Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2002-2007 Niels Provos <provos@citi.umich.edu> |
| 3 | * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include "event2/event-config.h" |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 29 | #include "evconfig-private.h" |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 30 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 31 | #ifdef EVENT__HAVE_SYS_PARAM_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 32 | #include <sys/param.h> |
| 33 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 34 | #ifdef EVENT__HAVE_SYS_TYPES_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 35 | #include <sys/types.h> |
| 36 | #endif |
| 37 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 38 | #ifdef HAVE_SYS_IOCCOM_H |
| 39 | #include <sys/ioccom.h> |
| 40 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 41 | #ifdef EVENT__HAVE_SYS_RESOURCE_H |
Josh Gao | 83a0c9c | 2017-08-10 12:30:25 -0700 | [diff] [blame] | 42 | #include <sys/resource.h> |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 43 | #endif |
| 44 | #ifdef EVENT__HAVE_SYS_TIME_H |
| 45 | #include <sys/time.h> |
| 46 | #endif |
| 47 | #ifdef EVENT__HAVE_SYS_WAIT_H |
| 48 | #include <sys/wait.h> |
| 49 | #endif |
| 50 | |
| 51 | #ifndef _WIN32 |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 52 | #include <sys/socket.h> |
| 53 | #include <sys/stat.h> |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 54 | #else /* _WIN32 */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 55 | #include <winsock2.h> |
| 56 | #include <ws2tcpip.h> |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 57 | #endif /* _WIN32 */ |
| 58 | |
| 59 | #ifdef EVENT__HAVE_SYS_UN_H |
| 60 | #include <sys/un.h> |
| 61 | #endif |
| 62 | #ifdef EVENT__HAVE_AFUNIX_H |
| 63 | #include <afunix.h> |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 64 | #endif |
| 65 | |
| 66 | #include <sys/queue.h> |
| 67 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 68 | #ifdef EVENT__HAVE_NETINET_IN_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 69 | #include <netinet/in.h> |
| 70 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 71 | #ifdef EVENT__HAVE_ARPA_INET_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 72 | #include <arpa/inet.h> |
| 73 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 74 | #ifdef EVENT__HAVE_NETDB_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 75 | #include <netdb.h> |
| 76 | #endif |
| 77 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 78 | #ifdef _WIN32 |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 79 | #include <winsock2.h> |
| 80 | #endif |
| 81 | |
| 82 | #include <errno.h> |
| 83 | #include <stdio.h> |
| 84 | #include <stdlib.h> |
| 85 | #include <string.h> |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 86 | #ifndef _WIN32 |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 87 | #include <syslog.h> |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 88 | #endif /* !_WIN32 */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 89 | #include <signal.h> |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 90 | #ifdef EVENT__HAVE_UNISTD_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 91 | #include <unistd.h> |
| 92 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 93 | #ifdef EVENT__HAVE_FCNTL_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 94 | #include <fcntl.h> |
| 95 | #endif |
| 96 | |
| 97 | #undef timeout_pending |
| 98 | #undef timeout_initialized |
| 99 | |
| 100 | #include "strlcpy-internal.h" |
| 101 | #include "event2/http.h" |
| 102 | #include "event2/event.h" |
| 103 | #include "event2/buffer.h" |
| 104 | #include "event2/bufferevent.h" |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 105 | #include "event2/http_struct.h" |
| 106 | #include "event2/http_compat.h" |
| 107 | #include "event2/util.h" |
| 108 | #include "event2/listener.h" |
| 109 | #include "log-internal.h" |
| 110 | #include "util-internal.h" |
| 111 | #include "http-internal.h" |
| 112 | #include "mm-internal.h" |
| 113 | #include "bufferevent-internal.h" |
| 114 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 115 | #ifndef EVENT__HAVE_GETNAMEINFO |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 116 | #define NI_MAXSERV 32 |
| 117 | #define NI_MAXHOST 1025 |
| 118 | |
| 119 | #ifndef NI_NUMERICHOST |
| 120 | #define NI_NUMERICHOST 1 |
| 121 | #endif |
| 122 | |
| 123 | #ifndef NI_NUMERICSERV |
| 124 | #define NI_NUMERICSERV 2 |
| 125 | #endif |
| 126 | |
| 127 | static int |
| 128 | fake_getnameinfo(const struct sockaddr *sa, size_t salen, char *host, |
| 129 | size_t hostlen, char *serv, size_t servlen, int flags) |
| 130 | { |
| 131 | struct sockaddr_in *sin = (struct sockaddr_in *)sa; |
| 132 | |
| 133 | if (serv != NULL) { |
| 134 | char tmpserv[16]; |
| 135 | evutil_snprintf(tmpserv, sizeof(tmpserv), |
| 136 | "%d", ntohs(sin->sin_port)); |
| 137 | if (strlcpy(serv, tmpserv, servlen) >= servlen) |
| 138 | return (-1); |
| 139 | } |
| 140 | |
| 141 | if (host != NULL) { |
| 142 | if (flags & NI_NUMERICHOST) { |
| 143 | if (strlcpy(host, inet_ntoa(sin->sin_addr), |
| 144 | hostlen) >= hostlen) |
| 145 | return (-1); |
| 146 | else |
| 147 | return (0); |
| 148 | } else { |
| 149 | struct hostent *hp; |
| 150 | hp = gethostbyaddr((char *)&sin->sin_addr, |
| 151 | sizeof(struct in_addr), AF_INET); |
| 152 | if (hp == NULL) |
| 153 | return (-2); |
| 154 | |
| 155 | if (strlcpy(host, hp->h_name, hostlen) >= hostlen) |
| 156 | return (-1); |
| 157 | else |
| 158 | return (0); |
| 159 | } |
| 160 | } |
| 161 | return (0); |
| 162 | } |
| 163 | |
| 164 | #endif |
| 165 | |
| 166 | #define REQ_VERSION_BEFORE(req, major_v, minor_v) \ |
| 167 | ((req)->major < (major_v) || \ |
| 168 | ((req)->major == (major_v) && (req)->minor < (minor_v))) |
| 169 | |
| 170 | #define REQ_VERSION_ATLEAST(req, major_v, minor_v) \ |
| 171 | ((req)->major > (major_v) || \ |
| 172 | ((req)->major == (major_v) && (req)->minor >= (minor_v))) |
| 173 | |
| 174 | #ifndef MIN |
| 175 | #define MIN(a,b) (((a)<(b))?(a):(b)) |
| 176 | #endif |
| 177 | |
| 178 | extern int debug; |
| 179 | |
| 180 | static evutil_socket_t bind_socket_ai(struct evutil_addrinfo *, int reuse); |
| 181 | static evutil_socket_t bind_socket(const char *, ev_uint16_t, int reuse); |
| 182 | static void name_from_addr(struct sockaddr *, ev_socklen_t, char **, char **); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 183 | static struct evhttp_uri *evhttp_uri_parse_authority(char *source_uri); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 184 | static int evhttp_associate_new_request_with_connection( |
| 185 | struct evhttp_connection *evcon); |
| 186 | static void evhttp_connection_start_detectclose( |
| 187 | struct evhttp_connection *evcon); |
| 188 | static void evhttp_connection_stop_detectclose( |
| 189 | struct evhttp_connection *evcon); |
| 190 | static void evhttp_request_dispatch(struct evhttp_connection* evcon); |
| 191 | static void evhttp_read_firstline(struct evhttp_connection *evcon, |
| 192 | struct evhttp_request *req); |
| 193 | static void evhttp_read_header(struct evhttp_connection *evcon, |
| 194 | struct evhttp_request *req); |
| 195 | static int evhttp_add_header_internal(struct evkeyvalq *headers, |
| 196 | const char *key, const char *value); |
| 197 | static const char *evhttp_response_phrase_internal(int code); |
| 198 | static void evhttp_get_request(struct evhttp *, evutil_socket_t, struct sockaddr *, ev_socklen_t); |
| 199 | static void evhttp_write_buffer(struct evhttp_connection *, |
| 200 | void (*)(struct evhttp_connection *, void *), void *); |
| 201 | static void evhttp_make_header(struct evhttp_connection *, struct evhttp_request *); |
| 202 | |
| 203 | /* callbacks for bufferevent */ |
| 204 | static void evhttp_read_cb(struct bufferevent *, void *); |
| 205 | static void evhttp_write_cb(struct bufferevent *, void *); |
| 206 | static void evhttp_error_cb(struct bufferevent *bufev, short what, void *arg); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 207 | static int evhttp_find_vhost(struct evhttp *http, struct evhttp **outhttp, |
| 208 | const char *hostname); |
| 209 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 210 | #ifndef EVENT__HAVE_STRSEP |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 211 | /* strsep replacement for platforms that lack it. Only works if |
| 212 | * del is one character long. */ |
| 213 | static char * |
| 214 | strsep(char **s, const char *del) |
| 215 | { |
| 216 | char *d, *tok; |
| 217 | EVUTIL_ASSERT(strlen(del) == 1); |
| 218 | if (!s || !*s) |
| 219 | return NULL; |
| 220 | tok = *s; |
| 221 | d = strstr(tok, del); |
| 222 | if (d) { |
| 223 | *d = '\0'; |
| 224 | *s = d + 1; |
| 225 | } else |
| 226 | *s = NULL; |
| 227 | return tok; |
| 228 | } |
| 229 | #endif |
| 230 | |
| 231 | static size_t |
| 232 | html_replace(const char ch, const char **escaped) |
| 233 | { |
| 234 | switch (ch) { |
| 235 | case '<': |
| 236 | *escaped = "<"; |
| 237 | return 4; |
| 238 | case '>': |
| 239 | *escaped = ">"; |
| 240 | return 4; |
| 241 | case '"': |
| 242 | *escaped = """; |
| 243 | return 6; |
| 244 | case '\'': |
| 245 | *escaped = "'"; |
| 246 | return 6; |
| 247 | case '&': |
| 248 | *escaped = "&"; |
| 249 | return 5; |
| 250 | default: |
| 251 | break; |
| 252 | } |
| 253 | |
| 254 | return 1; |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * Replaces <, >, ", ' and & with <, >, ", |
| 259 | * ' and & correspondingly. |
| 260 | * |
| 261 | * The returned string needs to be freed by the caller. |
| 262 | */ |
| 263 | |
| 264 | char * |
| 265 | evhttp_htmlescape(const char *html) |
| 266 | { |
| 267 | size_t i; |
| 268 | size_t new_size = 0, old_size = 0; |
| 269 | char *escaped_html, *p; |
| 270 | |
| 271 | if (html == NULL) |
| 272 | return (NULL); |
| 273 | |
| 274 | old_size = strlen(html); |
| 275 | for (i = 0; i < old_size; ++i) { |
| 276 | const char *replaced = NULL; |
| 277 | const size_t replace_size = html_replace(html[i], &replaced); |
| 278 | if (replace_size > EV_SIZE_MAX - new_size) { |
| 279 | event_warn("%s: html_replace overflow", __func__); |
| 280 | return (NULL); |
| 281 | } |
| 282 | new_size += replace_size; |
| 283 | } |
| 284 | |
| 285 | if (new_size == EV_SIZE_MAX) |
| 286 | return (NULL); |
| 287 | p = escaped_html = mm_malloc(new_size + 1); |
| 288 | if (escaped_html == NULL) { |
| 289 | event_warn("%s: malloc(%lu)", __func__, |
| 290 | (unsigned long)(new_size + 1)); |
| 291 | return (NULL); |
| 292 | } |
| 293 | for (i = 0; i < old_size; ++i) { |
| 294 | const char *replaced = &html[i]; |
| 295 | const size_t len = html_replace(html[i], &replaced); |
| 296 | memcpy(p, replaced, len); |
| 297 | p += len; |
| 298 | } |
| 299 | |
| 300 | *p = '\0'; |
| 301 | |
| 302 | return (escaped_html); |
| 303 | } |
| 304 | |
| 305 | /** Given an evhttp_cmd_type, returns a constant string containing the |
| 306 | * equivalent HTTP command, or NULL if the evhttp_command_type is |
| 307 | * unrecognized. */ |
| 308 | static const char * |
| 309 | evhttp_method(enum evhttp_cmd_type type) |
| 310 | { |
| 311 | const char *method; |
| 312 | |
| 313 | switch (type) { |
| 314 | case EVHTTP_REQ_GET: |
| 315 | method = "GET"; |
| 316 | break; |
| 317 | case EVHTTP_REQ_POST: |
| 318 | method = "POST"; |
| 319 | break; |
| 320 | case EVHTTP_REQ_HEAD: |
| 321 | method = "HEAD"; |
| 322 | break; |
| 323 | case EVHTTP_REQ_PUT: |
| 324 | method = "PUT"; |
| 325 | break; |
| 326 | case EVHTTP_REQ_DELETE: |
| 327 | method = "DELETE"; |
| 328 | break; |
| 329 | case EVHTTP_REQ_OPTIONS: |
| 330 | method = "OPTIONS"; |
| 331 | break; |
| 332 | case EVHTTP_REQ_TRACE: |
| 333 | method = "TRACE"; |
| 334 | break; |
| 335 | case EVHTTP_REQ_CONNECT: |
| 336 | method = "CONNECT"; |
| 337 | break; |
| 338 | case EVHTTP_REQ_PATCH: |
| 339 | method = "PATCH"; |
| 340 | break; |
| 341 | default: |
| 342 | method = NULL; |
| 343 | break; |
| 344 | } |
| 345 | |
| 346 | return (method); |
| 347 | } |
| 348 | |
| 349 | /** |
| 350 | * Determines if a response should have a body. |
| 351 | * Follows the rules in RFC 2616 section 4.3. |
| 352 | * @return 1 if the response MUST have a body; 0 if the response MUST NOT have |
| 353 | * a body. |
| 354 | */ |
| 355 | static int |
| 356 | evhttp_response_needs_body(struct evhttp_request *req) |
| 357 | { |
| 358 | return (req->response_code != HTTP_NOCONTENT && |
| 359 | req->response_code != HTTP_NOTMODIFIED && |
| 360 | (req->response_code < 100 || req->response_code >= 200) && |
| 361 | req->type != EVHTTP_REQ_HEAD); |
| 362 | } |
| 363 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 364 | /** Helper: called after we've added some data to an evcon's bufferevent's |
| 365 | * output buffer. Sets the evconn's writing-is-done callback, and puts |
| 366 | * the bufferevent into writing mode. |
| 367 | */ |
| 368 | static void |
| 369 | evhttp_write_buffer(struct evhttp_connection *evcon, |
| 370 | void (*cb)(struct evhttp_connection *, void *), void *arg) |
| 371 | { |
| 372 | event_debug(("%s: preparing to write buffer\n", __func__)); |
| 373 | |
| 374 | /* Set call back */ |
| 375 | evcon->cb = cb; |
| 376 | evcon->cb_arg = arg; |
| 377 | |
| 378 | /* Disable the read callback: we don't actually care about data; |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 379 | * we only care about close detection. (We don't disable reading -- |
| 380 | * EV_READ, since we *do* want to learn about any close events.) */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 381 | bufferevent_setcb(evcon->bufev, |
| 382 | NULL, /*read*/ |
| 383 | evhttp_write_cb, |
| 384 | evhttp_error_cb, |
| 385 | evcon); |
| 386 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 387 | bufferevent_enable(evcon->bufev, EV_READ|EV_WRITE); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | static void |
| 391 | evhttp_send_continue_done(struct evhttp_connection *evcon, void *arg) |
| 392 | { |
| 393 | bufferevent_disable(evcon->bufev, EV_WRITE); |
| 394 | } |
| 395 | |
| 396 | static void |
| 397 | evhttp_send_continue(struct evhttp_connection *evcon, |
| 398 | struct evhttp_request *req) |
| 399 | { |
| 400 | bufferevent_enable(evcon->bufev, EV_WRITE); |
| 401 | evbuffer_add_printf(bufferevent_get_output(evcon->bufev), |
| 402 | "HTTP/%d.%d 100 Continue\r\n\r\n", |
| 403 | req->major, req->minor); |
| 404 | evcon->cb = evhttp_send_continue_done; |
| 405 | evcon->cb_arg = NULL; |
| 406 | bufferevent_setcb(evcon->bufev, |
| 407 | evhttp_read_cb, |
| 408 | evhttp_write_cb, |
| 409 | evhttp_error_cb, |
| 410 | evcon); |
| 411 | } |
| 412 | |
| 413 | /** Helper: returns true iff evconn is in any connected state. */ |
| 414 | static int |
| 415 | evhttp_connected(struct evhttp_connection *evcon) |
| 416 | { |
| 417 | switch (evcon->state) { |
| 418 | case EVCON_DISCONNECTED: |
| 419 | case EVCON_CONNECTING: |
| 420 | return (0); |
| 421 | case EVCON_IDLE: |
| 422 | case EVCON_READING_FIRSTLINE: |
| 423 | case EVCON_READING_HEADERS: |
| 424 | case EVCON_READING_BODY: |
| 425 | case EVCON_READING_TRAILER: |
| 426 | case EVCON_WRITING: |
| 427 | default: |
| 428 | return (1); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /* Create the headers needed for an outgoing HTTP request, adds them to |
| 433 | * the request's header list, and writes the request line to the |
| 434 | * connection's output buffer. |
| 435 | */ |
| 436 | static void |
| 437 | evhttp_make_header_request(struct evhttp_connection *evcon, |
| 438 | struct evhttp_request *req) |
| 439 | { |
| 440 | const char *method; |
| 441 | |
| 442 | evhttp_remove_header(req->output_headers, "Proxy-Connection"); |
| 443 | |
| 444 | /* Generate request line */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 445 | if (!(method = evhttp_method(req->type))) { |
| 446 | method = "NULL"; |
| 447 | } |
| 448 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 449 | evbuffer_add_printf(bufferevent_get_output(evcon->bufev), |
| 450 | "%s %s HTTP/%d.%d\r\n", |
| 451 | method, req->uri, req->major, req->minor); |
| 452 | |
| 453 | /* Add the content length on a post or put request if missing */ |
| 454 | if ((req->type == EVHTTP_REQ_POST || req->type == EVHTTP_REQ_PUT) && |
| 455 | evhttp_find_header(req->output_headers, "Content-Length") == NULL){ |
| 456 | char size[22]; |
| 457 | evutil_snprintf(size, sizeof(size), EV_SIZE_FMT, |
| 458 | EV_SIZE_ARG(evbuffer_get_length(req->output_buffer))); |
| 459 | evhttp_add_header(req->output_headers, "Content-Length", size); |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | /** Return true if the list of headers in 'headers', intepreted with respect |
| 464 | * to flags, means that we should send a "connection: close" when the request |
| 465 | * is done. */ |
| 466 | static int |
| 467 | evhttp_is_connection_close(int flags, struct evkeyvalq* headers) |
| 468 | { |
| 469 | if (flags & EVHTTP_PROXY_REQUEST) { |
| 470 | /* proxy connection */ |
| 471 | const char *connection = evhttp_find_header(headers, "Proxy-Connection"); |
| 472 | return (connection == NULL || evutil_ascii_strcasecmp(connection, "keep-alive") != 0); |
| 473 | } else { |
| 474 | const char *connection = evhttp_find_header(headers, "Connection"); |
| 475 | return (connection != NULL && evutil_ascii_strcasecmp(connection, "close") == 0); |
| 476 | } |
| 477 | } |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 478 | static int |
| 479 | evhttp_is_request_connection_close(struct evhttp_request *req) |
| 480 | { |
| 481 | return |
| 482 | evhttp_is_connection_close(req->flags, req->input_headers) || |
| 483 | evhttp_is_connection_close(req->flags, req->output_headers); |
| 484 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 485 | |
| 486 | /* Return true iff 'headers' contains 'Connection: keep-alive' */ |
| 487 | static int |
| 488 | evhttp_is_connection_keepalive(struct evkeyvalq* headers) |
| 489 | { |
| 490 | const char *connection = evhttp_find_header(headers, "Connection"); |
| 491 | return (connection != NULL |
| 492 | && evutil_ascii_strncasecmp(connection, "keep-alive", 10) == 0); |
| 493 | } |
| 494 | |
| 495 | /* Add a correct "Date" header to headers, unless it already has one. */ |
| 496 | static void |
| 497 | evhttp_maybe_add_date_header(struct evkeyvalq *headers) |
| 498 | { |
| 499 | if (evhttp_find_header(headers, "Date") == NULL) { |
| 500 | char date[50]; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 501 | if (sizeof(date) - evutil_date_rfc1123(date, sizeof(date), NULL) > 0) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 502 | evhttp_add_header(headers, "Date", date); |
| 503 | } |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | /* Add a "Content-Length" header with value 'content_length' to headers, |
| 508 | * unless it already has a content-length or transfer-encoding header. */ |
| 509 | static void |
| 510 | evhttp_maybe_add_content_length_header(struct evkeyvalq *headers, |
| 511 | size_t content_length) |
| 512 | { |
| 513 | if (evhttp_find_header(headers, "Transfer-Encoding") == NULL && |
| 514 | evhttp_find_header(headers, "Content-Length") == NULL) { |
| 515 | char len[22]; |
| 516 | evutil_snprintf(len, sizeof(len), EV_SIZE_FMT, |
| 517 | EV_SIZE_ARG(content_length)); |
| 518 | evhttp_add_header(headers, "Content-Length", len); |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * Create the headers needed for an HTTP reply in req->output_headers, |
| 524 | * and write the first HTTP response for req line to evcon. |
| 525 | */ |
| 526 | static void |
| 527 | evhttp_make_header_response(struct evhttp_connection *evcon, |
| 528 | struct evhttp_request *req) |
| 529 | { |
| 530 | int is_keepalive = evhttp_is_connection_keepalive(req->input_headers); |
| 531 | evbuffer_add_printf(bufferevent_get_output(evcon->bufev), |
| 532 | "HTTP/%d.%d %d %s\r\n", |
| 533 | req->major, req->minor, req->response_code, |
| 534 | req->response_code_line); |
| 535 | |
| 536 | if (req->major == 1) { |
| 537 | if (req->minor >= 1) |
| 538 | evhttp_maybe_add_date_header(req->output_headers); |
| 539 | |
| 540 | /* |
| 541 | * if the protocol is 1.0; and the connection was keep-alive |
| 542 | * we need to add a keep-alive header, too. |
| 543 | */ |
| 544 | if (req->minor == 0 && is_keepalive) |
| 545 | evhttp_add_header(req->output_headers, |
| 546 | "Connection", "keep-alive"); |
| 547 | |
| 548 | if ((req->minor >= 1 || is_keepalive) && |
| 549 | evhttp_response_needs_body(req)) { |
| 550 | /* |
| 551 | * we need to add the content length if the |
| 552 | * user did not give it, this is required for |
| 553 | * persistent connections to work. |
| 554 | */ |
| 555 | evhttp_maybe_add_content_length_header( |
| 556 | req->output_headers, |
| 557 | evbuffer_get_length(req->output_buffer)); |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | /* Potentially add headers for unidentified content. */ |
| 562 | if (evhttp_response_needs_body(req)) { |
| 563 | if (evhttp_find_header(req->output_headers, |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 564 | "Content-Type") == NULL |
| 565 | && evcon->http_server->default_content_type) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 566 | evhttp_add_header(req->output_headers, |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 567 | "Content-Type", |
| 568 | evcon->http_server->default_content_type); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 569 | } |
| 570 | } |
| 571 | |
| 572 | /* if the request asked for a close, we send a close, too */ |
| 573 | if (evhttp_is_connection_close(req->flags, req->input_headers)) { |
| 574 | evhttp_remove_header(req->output_headers, "Connection"); |
| 575 | if (!(req->flags & EVHTTP_PROXY_REQUEST)) |
| 576 | evhttp_add_header(req->output_headers, "Connection", "close"); |
| 577 | evhttp_remove_header(req->output_headers, "Proxy-Connection"); |
| 578 | } |
| 579 | } |
| 580 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 581 | enum expect { NO, CONTINUE, OTHER }; |
| 582 | static enum expect evhttp_have_expect(struct evhttp_request *req, int input) |
| 583 | { |
| 584 | const char *expect; |
| 585 | struct evkeyvalq *h = input ? req->input_headers : req->output_headers; |
| 586 | |
| 587 | if (!(req->kind == EVHTTP_REQUEST) || !REQ_VERSION_ATLEAST(req, 1, 1)) |
| 588 | return NO; |
| 589 | |
| 590 | expect = evhttp_find_header(h, "Expect"); |
| 591 | if (!expect) |
| 592 | return NO; |
| 593 | |
| 594 | return !evutil_ascii_strcasecmp(expect, "100-continue") ? CONTINUE : OTHER; |
| 595 | } |
| 596 | |
| 597 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 598 | /** Generate all headers appropriate for sending the http request in req (or |
| 599 | * the response, if we're sending a response), and write them to evcon's |
| 600 | * bufferevent. Also writes all data from req->output_buffer */ |
| 601 | static void |
| 602 | evhttp_make_header(struct evhttp_connection *evcon, struct evhttp_request *req) |
| 603 | { |
| 604 | struct evkeyval *header; |
| 605 | struct evbuffer *output = bufferevent_get_output(evcon->bufev); |
| 606 | |
| 607 | /* |
| 608 | * Depending if this is a HTTP request or response, we might need to |
| 609 | * add some new headers or remove existing headers. |
| 610 | */ |
| 611 | if (req->kind == EVHTTP_REQUEST) { |
| 612 | evhttp_make_header_request(evcon, req); |
| 613 | } else { |
| 614 | evhttp_make_header_response(evcon, req); |
| 615 | } |
| 616 | |
| 617 | TAILQ_FOREACH(header, req->output_headers, next) { |
| 618 | evbuffer_add_printf(output, "%s: %s\r\n", |
| 619 | header->key, header->value); |
| 620 | } |
| 621 | evbuffer_add(output, "\r\n", 2); |
| 622 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 623 | if (evhttp_have_expect(req, 0) != CONTINUE && |
| 624 | evbuffer_get_length(req->output_buffer)) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 625 | /* |
| 626 | * For a request, we add the POST data, for a reply, this |
| 627 | * is the regular data. |
| 628 | */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 629 | evbuffer_add_buffer(output, req->output_buffer); |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | void |
| 634 | evhttp_connection_set_max_headers_size(struct evhttp_connection *evcon, |
| 635 | ev_ssize_t new_max_headers_size) |
| 636 | { |
| 637 | if (new_max_headers_size<0) |
| 638 | evcon->max_headers_size = EV_SIZE_MAX; |
| 639 | else |
| 640 | evcon->max_headers_size = new_max_headers_size; |
| 641 | } |
| 642 | void |
| 643 | evhttp_connection_set_max_body_size(struct evhttp_connection* evcon, |
| 644 | ev_ssize_t new_max_body_size) |
| 645 | { |
| 646 | if (new_max_body_size<0) |
| 647 | evcon->max_body_size = EV_UINT64_MAX; |
| 648 | else |
| 649 | evcon->max_body_size = new_max_body_size; |
| 650 | } |
| 651 | |
| 652 | static int |
| 653 | evhttp_connection_incoming_fail(struct evhttp_request *req, |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 654 | enum evhttp_request_error error) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 655 | { |
| 656 | switch (error) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 657 | case EVREQ_HTTP_DATA_TOO_LONG: |
| 658 | req->response_code = HTTP_ENTITYTOOLARGE; |
| 659 | break; |
| 660 | default: |
| 661 | req->response_code = HTTP_BADREQUEST; |
| 662 | } |
| 663 | |
| 664 | switch (error) { |
| 665 | case EVREQ_HTTP_TIMEOUT: |
| 666 | case EVREQ_HTTP_EOF: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 667 | /* |
| 668 | * these are cases in which we probably should just |
| 669 | * close the connection and not send a reply. this |
| 670 | * case may happen when a browser keeps a persistent |
| 671 | * connection open and we timeout on the read. when |
| 672 | * the request is still being used for sending, we |
| 673 | * need to disassociated it from the connection here. |
| 674 | */ |
| 675 | if (!req->userdone) { |
| 676 | /* remove it so that it will not be freed */ |
| 677 | TAILQ_REMOVE(&req->evcon->requests, req, next); |
| 678 | /* indicate that this request no longer has a |
| 679 | * connection object |
| 680 | */ |
| 681 | req->evcon = NULL; |
| 682 | } |
| 683 | return (-1); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 684 | case EVREQ_HTTP_INVALID_HEADER: |
| 685 | case EVREQ_HTTP_BUFFER_ERROR: |
| 686 | case EVREQ_HTTP_REQUEST_CANCEL: |
| 687 | case EVREQ_HTTP_DATA_TOO_LONG: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 688 | default: /* xxx: probably should just error on default */ |
| 689 | /* the callback looks at the uri to determine errors */ |
| 690 | if (req->uri) { |
| 691 | mm_free(req->uri); |
| 692 | req->uri = NULL; |
| 693 | } |
| 694 | if (req->uri_elems) { |
| 695 | evhttp_uri_free(req->uri_elems); |
| 696 | req->uri_elems = NULL; |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * the callback needs to send a reply, once the reply has |
| 701 | * been send, the connection should get freed. |
| 702 | */ |
| 703 | (*req->cb)(req, req->cb_arg); |
| 704 | } |
| 705 | |
| 706 | return (0); |
| 707 | } |
| 708 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 709 | /* Free connection ownership of which can be acquired by user using |
| 710 | * evhttp_request_own(). */ |
| 711 | static inline void |
| 712 | evhttp_request_free_auto(struct evhttp_request *req) |
| 713 | { |
| 714 | if (!(req->flags & EVHTTP_USER_OWNED)) |
| 715 | evhttp_request_free(req); |
| 716 | } |
| 717 | |
| 718 | static void |
| 719 | evhttp_request_free_(struct evhttp_connection *evcon, struct evhttp_request *req) |
| 720 | { |
| 721 | TAILQ_REMOVE(&evcon->requests, req, next); |
| 722 | evhttp_request_free_auto(req); |
| 723 | } |
| 724 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 725 | /* Called when evcon has experienced a (non-recoverable? -NM) error, as |
| 726 | * given in error. If it's an outgoing connection, reset the connection, |
| 727 | * retry any pending requests, and inform the user. If it's incoming, |
| 728 | * delegates to evhttp_connection_incoming_fail(). */ |
| 729 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 730 | evhttp_connection_fail_(struct evhttp_connection *evcon, |
| 731 | enum evhttp_request_error error) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 732 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 733 | const int errsave = EVUTIL_SOCKET_ERROR(); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 734 | struct evhttp_request* req = TAILQ_FIRST(&evcon->requests); |
| 735 | void (*cb)(struct evhttp_request *, void *); |
| 736 | void *cb_arg; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 737 | void (*error_cb)(enum evhttp_request_error, void *); |
| 738 | void *error_cb_arg; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 739 | EVUTIL_ASSERT(req != NULL); |
| 740 | |
| 741 | bufferevent_disable(evcon->bufev, EV_READ|EV_WRITE); |
| 742 | |
| 743 | if (evcon->flags & EVHTTP_CON_INCOMING) { |
| 744 | /* |
| 745 | * for incoming requests, there are two different |
| 746 | * failure cases. it's either a network level error |
| 747 | * or an http layer error. for problems on the network |
| 748 | * layer like timeouts we just drop the connections. |
| 749 | * For HTTP problems, we might have to send back a |
| 750 | * reply before the connection can be freed. |
| 751 | */ |
| 752 | if (evhttp_connection_incoming_fail(req, error) == -1) |
| 753 | evhttp_connection_free(evcon); |
| 754 | return; |
| 755 | } |
| 756 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 757 | error_cb = req->error_cb; |
| 758 | error_cb_arg = req->cb_arg; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 759 | /* when the request was canceled, the callback is not executed */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 760 | if (error != EVREQ_HTTP_REQUEST_CANCEL) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 761 | /* save the callback for later; the cb might free our object */ |
| 762 | cb = req->cb; |
| 763 | cb_arg = req->cb_arg; |
| 764 | } else { |
| 765 | cb = NULL; |
| 766 | cb_arg = NULL; |
| 767 | } |
| 768 | |
| 769 | /* do not fail all requests; the next request is going to get |
| 770 | * send over a new connection. when a user cancels a request, |
| 771 | * all other pending requests should be processed as normal |
| 772 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 773 | evhttp_request_free_(evcon, req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 774 | |
| 775 | /* reset the connection */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 776 | evhttp_connection_reset_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 777 | |
| 778 | /* We are trying the next request that was queued on us */ |
| 779 | if (TAILQ_FIRST(&evcon->requests) != NULL) |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 780 | evhttp_connection_connect_(evcon); |
| 781 | |
| 782 | /* The call to evhttp_connection_reset_ overwrote errno. |
| 783 | * Let's restore the original errno, so that the user's |
| 784 | * callback can have a better idea of what the error was. |
| 785 | */ |
| 786 | EVUTIL_SET_SOCKET_ERROR(errsave); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 787 | |
| 788 | /* inform the user */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 789 | if (error_cb != NULL) |
| 790 | error_cb(error, error_cb_arg); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 791 | if (cb != NULL) |
| 792 | (*cb)(NULL, cb_arg); |
| 793 | } |
| 794 | |
| 795 | /* Bufferevent callback: invoked when any data has been written from an |
| 796 | * http connection's bufferevent */ |
| 797 | static void |
| 798 | evhttp_write_cb(struct bufferevent *bufev, void *arg) |
| 799 | { |
| 800 | struct evhttp_connection *evcon = arg; |
| 801 | |
| 802 | /* Activate our call back */ |
| 803 | if (evcon->cb != NULL) |
| 804 | (*evcon->cb)(evcon, evcon->cb_arg); |
| 805 | } |
| 806 | |
| 807 | /** |
| 808 | * Advance the connection state. |
| 809 | * - If this is an outgoing connection, we've just processed the response; |
| 810 | * idle or close the connection. |
| 811 | * - If this is an incoming connection, we've just processed the request; |
| 812 | * respond. |
| 813 | */ |
| 814 | static void |
| 815 | evhttp_connection_done(struct evhttp_connection *evcon) |
| 816 | { |
| 817 | struct evhttp_request *req = TAILQ_FIRST(&evcon->requests); |
| 818 | int con_outgoing = evcon->flags & EVHTTP_CON_OUTGOING; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 819 | int free_evcon = 0; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 820 | |
| 821 | if (con_outgoing) { |
| 822 | /* idle or close the connection */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 823 | int need_close = evhttp_is_request_connection_close(req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 824 | TAILQ_REMOVE(&evcon->requests, req, next); |
| 825 | req->evcon = NULL; |
| 826 | |
| 827 | evcon->state = EVCON_IDLE; |
| 828 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 829 | /* check if we got asked to close the connection */ |
| 830 | if (need_close) |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 831 | evhttp_connection_reset_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 832 | |
| 833 | if (TAILQ_FIRST(&evcon->requests) != NULL) { |
| 834 | /* |
| 835 | * We have more requests; reset the connection |
| 836 | * and deal with the next request. |
| 837 | */ |
| 838 | if (!evhttp_connected(evcon)) |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 839 | evhttp_connection_connect_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 840 | else |
| 841 | evhttp_request_dispatch(evcon); |
| 842 | } else if (!need_close) { |
| 843 | /* |
| 844 | * The connection is going to be persistent, but we |
| 845 | * need to detect if the other side closes it. |
| 846 | */ |
| 847 | evhttp_connection_start_detectclose(evcon); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 848 | } else if ((evcon->flags & EVHTTP_CON_AUTOFREE)) { |
| 849 | /* |
| 850 | * If we have no more requests that need completion |
| 851 | * and we're not waiting for the connection to close |
| 852 | */ |
| 853 | free_evcon = 1; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 854 | } |
| 855 | } else { |
| 856 | /* |
| 857 | * incoming connection - we need to leave the request on the |
| 858 | * connection so that we can reply to it. |
| 859 | */ |
| 860 | evcon->state = EVCON_WRITING; |
| 861 | } |
| 862 | |
| 863 | /* notify the user of the request */ |
| 864 | (*req->cb)(req, req->cb_arg); |
| 865 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 866 | /* if this was an outgoing request, we own and it's done. so free it. */ |
| 867 | if (con_outgoing) { |
| 868 | evhttp_request_free_auto(req); |
| 869 | } |
| 870 | |
| 871 | /* If this was the last request of an outgoing connection and we're |
| 872 | * not waiting to receive a connection close event and we want to |
| 873 | * automatically free the connection. We check to ensure our request |
| 874 | * list is empty one last time just in case our callback added a |
| 875 | * new request. |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 876 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 877 | if (free_evcon && TAILQ_FIRST(&evcon->requests) == NULL) { |
| 878 | evhttp_connection_free(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 879 | } |
| 880 | } |
| 881 | |
| 882 | /* |
| 883 | * Handles reading from a chunked request. |
| 884 | * return ALL_DATA_READ: |
| 885 | * all data has been read |
| 886 | * return MORE_DATA_EXPECTED: |
| 887 | * more data is expected |
| 888 | * return DATA_CORRUPTED: |
| 889 | * data is corrupted |
| 890 | * return REQUEST_CANCELED: |
| 891 | * request was canceled by the user calling evhttp_cancel_request |
| 892 | * return DATA_TOO_LONG: |
| 893 | * ran over the maximum limit |
| 894 | */ |
| 895 | |
| 896 | static enum message_read_status |
| 897 | evhttp_handle_chunked_read(struct evhttp_request *req, struct evbuffer *buf) |
| 898 | { |
| 899 | if (req == NULL || buf == NULL) { |
| 900 | return DATA_CORRUPTED; |
| 901 | } |
| 902 | |
| 903 | while (1) { |
| 904 | size_t buflen; |
| 905 | |
| 906 | if ((buflen = evbuffer_get_length(buf)) == 0) { |
| 907 | break; |
| 908 | } |
| 909 | |
| 910 | /* evbuffer_get_length returns size_t, but len variable is ssize_t, |
| 911 | * check for overflow conditions */ |
| 912 | if (buflen > EV_SSIZE_MAX) { |
| 913 | return DATA_CORRUPTED; |
| 914 | } |
| 915 | |
| 916 | if (req->ntoread < 0) { |
| 917 | /* Read chunk size */ |
| 918 | ev_int64_t ntoread; |
| 919 | char *p = evbuffer_readln(buf, NULL, EVBUFFER_EOL_CRLF); |
| 920 | char *endp; |
| 921 | int error; |
| 922 | if (p == NULL) |
| 923 | break; |
| 924 | /* the last chunk is on a new line? */ |
| 925 | if (strlen(p) == 0) { |
| 926 | mm_free(p); |
| 927 | continue; |
| 928 | } |
| 929 | ntoread = evutil_strtoll(p, &endp, 16); |
| 930 | error = (*p == '\0' || |
| 931 | (*endp != '\0' && *endp != ' ') || |
| 932 | ntoread < 0); |
| 933 | mm_free(p); |
| 934 | if (error) { |
| 935 | /* could not get chunk size */ |
| 936 | return (DATA_CORRUPTED); |
| 937 | } |
| 938 | |
| 939 | /* ntoread is signed int64, body_size is unsigned size_t, check for under/overflow conditions */ |
| 940 | if ((ev_uint64_t)ntoread > EV_SIZE_MAX - req->body_size) { |
| 941 | return DATA_CORRUPTED; |
| 942 | } |
| 943 | |
| 944 | if (req->body_size + (size_t)ntoread > req->evcon->max_body_size) { |
| 945 | /* failed body length test */ |
| 946 | event_debug(("Request body is too long")); |
| 947 | return (DATA_TOO_LONG); |
| 948 | } |
| 949 | |
| 950 | req->body_size += (size_t)ntoread; |
| 951 | req->ntoread = ntoread; |
| 952 | if (req->ntoread == 0) { |
| 953 | /* Last chunk */ |
| 954 | return (ALL_DATA_READ); |
| 955 | } |
| 956 | continue; |
| 957 | } |
| 958 | |
| 959 | /* req->ntoread is signed int64, len is ssize_t, based on arch, |
| 960 | * ssize_t could only be 32b, check for these conditions */ |
| 961 | if (req->ntoread > EV_SSIZE_MAX) { |
| 962 | return DATA_CORRUPTED; |
| 963 | } |
| 964 | |
| 965 | /* don't have enough to complete a chunk; wait for more */ |
| 966 | if (req->ntoread > 0 && buflen < (ev_uint64_t)req->ntoread) |
| 967 | return (MORE_DATA_EXPECTED); |
| 968 | |
| 969 | /* Completed chunk */ |
| 970 | evbuffer_remove_buffer(buf, req->input_buffer, (size_t)req->ntoread); |
| 971 | req->ntoread = -1; |
| 972 | if (req->chunk_cb != NULL) { |
| 973 | req->flags |= EVHTTP_REQ_DEFER_FREE; |
| 974 | (*req->chunk_cb)(req, req->cb_arg); |
| 975 | evbuffer_drain(req->input_buffer, |
| 976 | evbuffer_get_length(req->input_buffer)); |
| 977 | req->flags &= ~EVHTTP_REQ_DEFER_FREE; |
| 978 | if ((req->flags & EVHTTP_REQ_NEEDS_FREE) != 0) { |
| 979 | return (REQUEST_CANCELED); |
| 980 | } |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | return (MORE_DATA_EXPECTED); |
| 985 | } |
| 986 | |
| 987 | static void |
| 988 | evhttp_read_trailer(struct evhttp_connection *evcon, struct evhttp_request *req) |
| 989 | { |
| 990 | struct evbuffer *buf = bufferevent_get_input(evcon->bufev); |
| 991 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 992 | switch (evhttp_parse_headers_(req, buf)) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 993 | case DATA_CORRUPTED: |
| 994 | case DATA_TOO_LONG: |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 995 | evhttp_connection_fail_(evcon, EVREQ_HTTP_DATA_TOO_LONG); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 996 | break; |
| 997 | case ALL_DATA_READ: |
| 998 | bufferevent_disable(evcon->bufev, EV_READ); |
| 999 | evhttp_connection_done(evcon); |
| 1000 | break; |
| 1001 | case MORE_DATA_EXPECTED: |
| 1002 | case REQUEST_CANCELED: /* ??? */ |
| 1003 | default: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1004 | break; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | static void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1009 | evhttp_lingering_close(struct evhttp_connection *evcon, |
| 1010 | struct evhttp_request *req) |
| 1011 | { |
| 1012 | struct evbuffer *buf = bufferevent_get_input(evcon->bufev); |
| 1013 | |
| 1014 | size_t n = evbuffer_get_length(buf); |
| 1015 | if (n > (size_t) req->ntoread) |
| 1016 | n = (size_t) req->ntoread; |
| 1017 | req->ntoread -= n; |
| 1018 | req->body_size += n; |
| 1019 | |
| 1020 | event_debug(("Request body is too long, left " EV_I64_FMT, |
| 1021 | EV_I64_ARG(req->ntoread))); |
| 1022 | |
| 1023 | evbuffer_drain(buf, n); |
| 1024 | if (!req->ntoread) |
| 1025 | evhttp_connection_fail_(evcon, EVREQ_HTTP_DATA_TOO_LONG); |
| 1026 | } |
| 1027 | static void |
| 1028 | evhttp_lingering_fail(struct evhttp_connection *evcon, |
| 1029 | struct evhttp_request *req) |
| 1030 | { |
| 1031 | if (evcon->flags & EVHTTP_CON_LINGERING_CLOSE) |
| 1032 | evhttp_lingering_close(evcon, req); |
| 1033 | else |
| 1034 | evhttp_connection_fail_(evcon, EVREQ_HTTP_DATA_TOO_LONG); |
| 1035 | } |
| 1036 | |
| 1037 | static void |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1038 | evhttp_read_body(struct evhttp_connection *evcon, struct evhttp_request *req) |
| 1039 | { |
| 1040 | struct evbuffer *buf = bufferevent_get_input(evcon->bufev); |
| 1041 | |
| 1042 | if (req->chunked) { |
| 1043 | switch (evhttp_handle_chunked_read(req, buf)) { |
| 1044 | case ALL_DATA_READ: |
| 1045 | /* finished last chunk */ |
| 1046 | evcon->state = EVCON_READING_TRAILER; |
| 1047 | evhttp_read_trailer(evcon, req); |
| 1048 | return; |
| 1049 | case DATA_CORRUPTED: |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1050 | case DATA_TOO_LONG: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1051 | /* corrupted data */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1052 | evhttp_connection_fail_(evcon, |
| 1053 | EVREQ_HTTP_DATA_TOO_LONG); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1054 | return; |
| 1055 | case REQUEST_CANCELED: |
| 1056 | /* request canceled */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1057 | evhttp_request_free_auto(req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1058 | return; |
| 1059 | case MORE_DATA_EXPECTED: |
| 1060 | default: |
| 1061 | break; |
| 1062 | } |
| 1063 | } else if (req->ntoread < 0) { |
| 1064 | /* Read until connection close. */ |
| 1065 | if ((size_t)(req->body_size + evbuffer_get_length(buf)) < req->body_size) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1066 | evhttp_connection_fail_(evcon, EVREQ_HTTP_INVALID_HEADER); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1067 | return; |
| 1068 | } |
| 1069 | |
| 1070 | req->body_size += evbuffer_get_length(buf); |
| 1071 | evbuffer_add_buffer(req->input_buffer, buf); |
| 1072 | } else if (req->chunk_cb != NULL || evbuffer_get_length(buf) >= (size_t)req->ntoread) { |
| 1073 | /* XXX: the above get_length comparison has to be fixed for overflow conditions! */ |
| 1074 | /* We've postponed moving the data until now, but we're |
| 1075 | * about to use it. */ |
| 1076 | size_t n = evbuffer_get_length(buf); |
| 1077 | |
| 1078 | if (n > (size_t) req->ntoread) |
| 1079 | n = (size_t) req->ntoread; |
| 1080 | req->ntoread -= n; |
| 1081 | req->body_size += n; |
| 1082 | evbuffer_remove_buffer(buf, req->input_buffer, n); |
| 1083 | } |
| 1084 | |
| 1085 | if (req->body_size > req->evcon->max_body_size || |
| 1086 | (!req->chunked && req->ntoread >= 0 && |
| 1087 | (size_t)req->ntoread > req->evcon->max_body_size)) { |
| 1088 | /* XXX: The above casted comparison must checked for overflow */ |
| 1089 | /* failed body length test */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1090 | |
| 1091 | evhttp_lingering_fail(evcon, req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1092 | return; |
| 1093 | } |
| 1094 | |
| 1095 | if (evbuffer_get_length(req->input_buffer) > 0 && req->chunk_cb != NULL) { |
| 1096 | req->flags |= EVHTTP_REQ_DEFER_FREE; |
| 1097 | (*req->chunk_cb)(req, req->cb_arg); |
| 1098 | req->flags &= ~EVHTTP_REQ_DEFER_FREE; |
| 1099 | evbuffer_drain(req->input_buffer, |
| 1100 | evbuffer_get_length(req->input_buffer)); |
| 1101 | if ((req->flags & EVHTTP_REQ_NEEDS_FREE) != 0) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1102 | evhttp_request_free_auto(req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1103 | return; |
| 1104 | } |
| 1105 | } |
| 1106 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1107 | if (!req->ntoread) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1108 | bufferevent_disable(evcon->bufev, EV_READ); |
| 1109 | /* Completed content length */ |
| 1110 | evhttp_connection_done(evcon); |
| 1111 | return; |
| 1112 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | #define get_deferred_queue(evcon) \ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1116 | ((evcon)->base) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1117 | |
| 1118 | /* |
| 1119 | * Gets called when more data becomes available |
| 1120 | */ |
| 1121 | |
| 1122 | static void |
| 1123 | evhttp_read_cb(struct bufferevent *bufev, void *arg) |
| 1124 | { |
| 1125 | struct evhttp_connection *evcon = arg; |
| 1126 | struct evhttp_request *req = TAILQ_FIRST(&evcon->requests); |
| 1127 | |
| 1128 | /* Cancel if it's pending. */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1129 | event_deferred_cb_cancel_(get_deferred_queue(evcon), |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1130 | &evcon->read_more_deferred_cb); |
| 1131 | |
| 1132 | switch (evcon->state) { |
| 1133 | case EVCON_READING_FIRSTLINE: |
| 1134 | evhttp_read_firstline(evcon, req); |
| 1135 | /* note the request may have been freed in |
| 1136 | * evhttp_read_body */ |
| 1137 | break; |
| 1138 | case EVCON_READING_HEADERS: |
| 1139 | evhttp_read_header(evcon, req); |
| 1140 | /* note the request may have been freed in |
| 1141 | * evhttp_read_body */ |
| 1142 | break; |
| 1143 | case EVCON_READING_BODY: |
| 1144 | evhttp_read_body(evcon, req); |
| 1145 | /* note the request may have been freed in |
| 1146 | * evhttp_read_body */ |
| 1147 | break; |
| 1148 | case EVCON_READING_TRAILER: |
| 1149 | evhttp_read_trailer(evcon, req); |
| 1150 | break; |
| 1151 | case EVCON_IDLE: |
| 1152 | { |
| 1153 | #ifdef USE_DEBUG |
| 1154 | struct evbuffer *input; |
| 1155 | size_t total_len; |
| 1156 | |
| 1157 | input = bufferevent_get_input(evcon->bufev); |
| 1158 | total_len = evbuffer_get_length(input); |
| 1159 | event_debug(("%s: read "EV_SIZE_FMT |
| 1160 | " bytes in EVCON_IDLE state," |
| 1161 | " resetting connection", |
| 1162 | __func__, EV_SIZE_ARG(total_len))); |
| 1163 | #endif |
| 1164 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1165 | evhttp_connection_reset_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1166 | } |
| 1167 | break; |
| 1168 | case EVCON_DISCONNECTED: |
| 1169 | case EVCON_CONNECTING: |
| 1170 | case EVCON_WRITING: |
| 1171 | default: |
| 1172 | event_errx(1, "%s: illegal connection state %d", |
| 1173 | __func__, evcon->state); |
| 1174 | } |
| 1175 | } |
| 1176 | |
| 1177 | static void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1178 | evhttp_deferred_read_cb(struct event_callback *cb, void *data) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1179 | { |
| 1180 | struct evhttp_connection *evcon = data; |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1181 | struct bufferevent *bev = evcon->bufev; |
| 1182 | if (bev->readcb) |
| 1183 | (bev->readcb)(evcon->bufev, evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1184 | } |
| 1185 | |
| 1186 | static void |
| 1187 | evhttp_write_connectioncb(struct evhttp_connection *evcon, void *arg) |
| 1188 | { |
| 1189 | /* This is after writing the request to the server */ |
| 1190 | struct evhttp_request *req = TAILQ_FIRST(&evcon->requests); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1191 | struct evbuffer *output = bufferevent_get_output(evcon->bufev); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1192 | EVUTIL_ASSERT(req != NULL); |
| 1193 | |
| 1194 | EVUTIL_ASSERT(evcon->state == EVCON_WRITING); |
| 1195 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1196 | /* We need to wait until we've written all of our output data before we can |
| 1197 | * continue */ |
| 1198 | if (evbuffer_get_length(output) > 0) |
| 1199 | return; |
| 1200 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1201 | /* We are done writing our header and are now expecting the response */ |
| 1202 | req->kind = EVHTTP_RESPONSE; |
| 1203 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1204 | evhttp_start_read_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * Clean up a connection object |
| 1209 | */ |
| 1210 | |
| 1211 | void |
| 1212 | evhttp_connection_free(struct evhttp_connection *evcon) |
| 1213 | { |
| 1214 | struct evhttp_request *req; |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1215 | int need_close = 0; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1216 | |
| 1217 | /* notify interested parties that this connection is going down */ |
| 1218 | if (evcon->fd != -1) { |
| 1219 | if (evhttp_connected(evcon) && evcon->closecb != NULL) |
| 1220 | (*evcon->closecb)(evcon, evcon->closecb_arg); |
| 1221 | } |
| 1222 | |
| 1223 | /* remove all requests that might be queued on this |
| 1224 | * connection. for server connections, this should be empty. |
| 1225 | * because it gets dequeued either in evhttp_connection_done or |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1226 | * evhttp_connection_fail_. |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1227 | */ |
| 1228 | while ((req = TAILQ_FIRST(&evcon->requests)) != NULL) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1229 | evhttp_request_free_(evcon, req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | if (evcon->http_server != NULL) { |
| 1233 | struct evhttp *http = evcon->http_server; |
| 1234 | TAILQ_REMOVE(&http->connections, evcon, next); |
| 1235 | } |
| 1236 | |
| 1237 | if (event_initialized(&evcon->retry_ev)) { |
| 1238 | event_del(&evcon->retry_ev); |
| 1239 | event_debug_unassign(&evcon->retry_ev); |
| 1240 | } |
| 1241 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1242 | event_deferred_cb_cancel_(get_deferred_queue(evcon), |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1243 | &evcon->read_more_deferred_cb); |
| 1244 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1245 | if (evcon->bufev != NULL) { |
| 1246 | need_close = |
| 1247 | !(bufferevent_get_options_(evcon->bufev) & BEV_OPT_CLOSE_ON_FREE); |
| 1248 | if (evcon->fd == -1) |
| 1249 | evcon->fd = bufferevent_getfd(evcon->bufev); |
| 1250 | |
| 1251 | bufferevent_free(evcon->bufev); |
| 1252 | } |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1253 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1254 | if (evcon->fd != -1) { |
| 1255 | shutdown(evcon->fd, EVUTIL_SHUT_WR); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1256 | if (need_close) |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1257 | evutil_closesocket(evcon->fd); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1258 | } |
| 1259 | |
| 1260 | if (evcon->bind_address != NULL) |
| 1261 | mm_free(evcon->bind_address); |
| 1262 | |
| 1263 | if (evcon->address != NULL) |
| 1264 | mm_free(evcon->address); |
| 1265 | |
| 1266 | mm_free(evcon); |
| 1267 | } |
| 1268 | |
| 1269 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1270 | evhttp_connection_free_on_completion(struct evhttp_connection *evcon) { |
| 1271 | evcon->flags |= EVHTTP_CON_AUTOFREE; |
| 1272 | } |
| 1273 | |
| 1274 | void |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1275 | evhttp_connection_set_local_address(struct evhttp_connection *evcon, |
| 1276 | const char *address) |
| 1277 | { |
| 1278 | EVUTIL_ASSERT(evcon->state == EVCON_DISCONNECTED); |
| 1279 | if (evcon->bind_address) |
| 1280 | mm_free(evcon->bind_address); |
| 1281 | if ((evcon->bind_address = mm_strdup(address)) == NULL) |
| 1282 | event_warn("%s: strdup", __func__); |
| 1283 | } |
| 1284 | |
| 1285 | void |
| 1286 | evhttp_connection_set_local_port(struct evhttp_connection *evcon, |
| 1287 | ev_uint16_t port) |
| 1288 | { |
| 1289 | EVUTIL_ASSERT(evcon->state == EVCON_DISCONNECTED); |
| 1290 | evcon->bind_port = port; |
| 1291 | } |
| 1292 | |
| 1293 | static void |
| 1294 | evhttp_request_dispatch(struct evhttp_connection* evcon) |
| 1295 | { |
| 1296 | struct evhttp_request *req = TAILQ_FIRST(&evcon->requests); |
| 1297 | |
| 1298 | /* this should not usually happy but it's possible */ |
| 1299 | if (req == NULL) |
| 1300 | return; |
| 1301 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1302 | EVUTIL_ASSERT(req->kind == EVHTTP_REQUEST); |
| 1303 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1304 | /* delete possible close detection events */ |
| 1305 | evhttp_connection_stop_detectclose(evcon); |
| 1306 | |
| 1307 | /* we assume that the connection is connected already */ |
| 1308 | EVUTIL_ASSERT(evcon->state == EVCON_IDLE); |
| 1309 | |
| 1310 | evcon->state = EVCON_WRITING; |
| 1311 | |
| 1312 | /* Create the header from the store arguments */ |
| 1313 | evhttp_make_header(evcon, req); |
| 1314 | |
| 1315 | evhttp_write_buffer(evcon, evhttp_write_connectioncb, NULL); |
| 1316 | } |
| 1317 | |
| 1318 | /* Reset our connection state: disables reading/writing, closes our fd (if |
| 1319 | * any), clears out buffers, and puts us in state DISCONNECTED. */ |
| 1320 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1321 | evhttp_connection_reset_(struct evhttp_connection *evcon) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1322 | { |
| 1323 | struct evbuffer *tmp; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1324 | int err; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1325 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1326 | bufferevent_setcb(evcon->bufev, NULL, NULL, NULL, NULL); |
| 1327 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1328 | /* XXXX This is not actually an optimal fix. Instead we ought to have |
| 1329 | an API for "stop connecting", or use bufferevent_setfd to turn off |
| 1330 | connecting. But for Libevent 2.0, this seems like a minimal change |
| 1331 | least likely to disrupt the rest of the bufferevent and http code. |
| 1332 | |
| 1333 | Why is this here? If the fd is set in the bufferevent, and the |
| 1334 | bufferevent is connecting, then you can't actually stop the |
| 1335 | bufferevent from trying to connect with bufferevent_disable(). The |
| 1336 | connect will never trigger, since we close the fd, but the timeout |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1337 | might. That caused an assertion failure in evhttp_connection_fail_. |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1338 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1339 | bufferevent_disable_hard_(evcon->bufev, EV_READ|EV_WRITE); |
| 1340 | |
| 1341 | if (evcon->fd == -1) |
| 1342 | evcon->fd = bufferevent_getfd(evcon->bufev); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1343 | |
| 1344 | if (evcon->fd != -1) { |
| 1345 | /* inform interested parties about connection close */ |
| 1346 | if (evhttp_connected(evcon) && evcon->closecb != NULL) |
| 1347 | (*evcon->closecb)(evcon, evcon->closecb_arg); |
| 1348 | |
| 1349 | shutdown(evcon->fd, EVUTIL_SHUT_WR); |
| 1350 | evutil_closesocket(evcon->fd); |
| 1351 | evcon->fd = -1; |
| 1352 | } |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1353 | err = bufferevent_setfd(evcon->bufev, -1); |
| 1354 | EVUTIL_ASSERT(!err && "setfd"); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1355 | |
| 1356 | /* we need to clean up any buffered data */ |
| 1357 | tmp = bufferevent_get_output(evcon->bufev); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1358 | err = evbuffer_drain(tmp, -1); |
| 1359 | EVUTIL_ASSERT(!err && "drain output"); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1360 | tmp = bufferevent_get_input(evcon->bufev); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1361 | err = evbuffer_drain(tmp, -1); |
| 1362 | EVUTIL_ASSERT(!err && "drain input"); |
| 1363 | |
| 1364 | evcon->flags &= ~EVHTTP_CON_READING_ERROR; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1365 | |
| 1366 | evcon->state = EVCON_DISCONNECTED; |
| 1367 | } |
| 1368 | |
| 1369 | static void |
| 1370 | evhttp_connection_start_detectclose(struct evhttp_connection *evcon) |
| 1371 | { |
| 1372 | evcon->flags |= EVHTTP_CON_CLOSEDETECT; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1373 | bufferevent_enable(evcon->bufev, EV_READ); |
| 1374 | } |
| 1375 | |
| 1376 | static void |
| 1377 | evhttp_connection_stop_detectclose(struct evhttp_connection *evcon) |
| 1378 | { |
| 1379 | evcon->flags &= ~EVHTTP_CON_CLOSEDETECT; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1380 | bufferevent_disable(evcon->bufev, EV_READ); |
| 1381 | } |
| 1382 | |
| 1383 | static void |
| 1384 | evhttp_connection_retry(evutil_socket_t fd, short what, void *arg) |
| 1385 | { |
| 1386 | struct evhttp_connection *evcon = arg; |
| 1387 | |
| 1388 | evcon->state = EVCON_DISCONNECTED; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1389 | evhttp_connection_connect_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1390 | } |
| 1391 | |
| 1392 | static void |
| 1393 | evhttp_connection_cb_cleanup(struct evhttp_connection *evcon) |
| 1394 | { |
| 1395 | struct evcon_requestq requests; |
| 1396 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1397 | evhttp_connection_reset_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1398 | if (evcon->retry_max < 0 || evcon->retry_cnt < evcon->retry_max) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1399 | struct timeval tv_retry = evcon->initial_retry_timeout; |
| 1400 | int i; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1401 | evtimer_assign(&evcon->retry_ev, evcon->base, evhttp_connection_retry, evcon); |
| 1402 | /* XXXX handle failure from evhttp_add_event */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1403 | for (i=0; i < evcon->retry_cnt; ++i) { |
| 1404 | tv_retry.tv_usec *= 2; |
| 1405 | if (tv_retry.tv_usec > 1000000) { |
| 1406 | tv_retry.tv_usec -= 1000000; |
| 1407 | tv_retry.tv_sec += 1; |
| 1408 | } |
| 1409 | tv_retry.tv_sec *= 2; |
| 1410 | if (tv_retry.tv_sec > 3600) { |
| 1411 | tv_retry.tv_sec = 3600; |
| 1412 | tv_retry.tv_usec = 0; |
| 1413 | } |
| 1414 | } |
| 1415 | event_add(&evcon->retry_ev, &tv_retry); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1416 | evcon->retry_cnt++; |
| 1417 | return; |
| 1418 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1419 | |
| 1420 | /* |
| 1421 | * User callback can do evhttp_make_request() on the same |
| 1422 | * evcon so new request will be added to evcon->requests. To |
| 1423 | * avoid freeing it prematurely we iterate over the copy of |
| 1424 | * the queue. |
| 1425 | */ |
| 1426 | TAILQ_INIT(&requests); |
| 1427 | while (TAILQ_FIRST(&evcon->requests) != NULL) { |
| 1428 | struct evhttp_request *request = TAILQ_FIRST(&evcon->requests); |
| 1429 | TAILQ_REMOVE(&evcon->requests, request, next); |
| 1430 | TAILQ_INSERT_TAIL(&requests, request, next); |
| 1431 | } |
| 1432 | |
| 1433 | /* for now, we just signal all requests by executing their callbacks */ |
| 1434 | while (TAILQ_FIRST(&requests) != NULL) { |
| 1435 | struct evhttp_request *request = TAILQ_FIRST(&requests); |
| 1436 | TAILQ_REMOVE(&requests, request, next); |
| 1437 | request->evcon = NULL; |
| 1438 | |
| 1439 | /* we might want to set an error here */ |
| 1440 | request->cb(request, request->cb_arg); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1441 | evhttp_request_free_auto(request); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1442 | } |
| 1443 | } |
| 1444 | |
| 1445 | static void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1446 | evhttp_connection_read_on_write_error(struct evhttp_connection *evcon, |
| 1447 | struct evhttp_request *req) |
| 1448 | { |
| 1449 | struct evbuffer *buf; |
| 1450 | |
| 1451 | /** Second time, we can't read anything */ |
| 1452 | if (evcon->flags & EVHTTP_CON_READING_ERROR) { |
| 1453 | evcon->flags &= ~EVHTTP_CON_READING_ERROR; |
| 1454 | evhttp_connection_fail_(evcon, EVREQ_HTTP_EOF); |
| 1455 | return; |
| 1456 | } |
| 1457 | |
| 1458 | req->kind = EVHTTP_RESPONSE; |
| 1459 | |
| 1460 | buf = bufferevent_get_output(evcon->bufev); |
| 1461 | evbuffer_unfreeze(buf, 1); |
| 1462 | evbuffer_drain(buf, evbuffer_get_length(buf)); |
| 1463 | evbuffer_freeze(buf, 1); |
| 1464 | |
| 1465 | evhttp_start_read_(evcon); |
| 1466 | evcon->flags |= EVHTTP_CON_READING_ERROR; |
| 1467 | } |
| 1468 | |
| 1469 | static void |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1470 | evhttp_error_cb(struct bufferevent *bufev, short what, void *arg) |
| 1471 | { |
| 1472 | struct evhttp_connection *evcon = arg; |
| 1473 | struct evhttp_request *req = TAILQ_FIRST(&evcon->requests); |
| 1474 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1475 | if (evcon->fd == -1) |
| 1476 | evcon->fd = bufferevent_getfd(bufev); |
| 1477 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1478 | switch (evcon->state) { |
| 1479 | case EVCON_CONNECTING: |
| 1480 | if (what & BEV_EVENT_TIMEOUT) { |
| 1481 | event_debug(("%s: connection timeout for \"%s:%d\" on " |
| 1482 | EV_SOCK_FMT, |
| 1483 | __func__, evcon->address, evcon->port, |
| 1484 | EV_SOCK_ARG(evcon->fd))); |
| 1485 | evhttp_connection_cb_cleanup(evcon); |
| 1486 | return; |
| 1487 | } |
| 1488 | break; |
| 1489 | |
| 1490 | case EVCON_READING_BODY: |
| 1491 | if (!req->chunked && req->ntoread < 0 |
| 1492 | && what == (BEV_EVENT_READING|BEV_EVENT_EOF)) { |
| 1493 | /* EOF on read can be benign */ |
| 1494 | evhttp_connection_done(evcon); |
| 1495 | return; |
| 1496 | } |
| 1497 | break; |
| 1498 | |
| 1499 | case EVCON_DISCONNECTED: |
| 1500 | case EVCON_IDLE: |
| 1501 | case EVCON_READING_FIRSTLINE: |
| 1502 | case EVCON_READING_HEADERS: |
| 1503 | case EVCON_READING_TRAILER: |
| 1504 | case EVCON_WRITING: |
| 1505 | default: |
| 1506 | break; |
| 1507 | } |
| 1508 | |
| 1509 | /* when we are in close detect mode, a read error means that |
| 1510 | * the other side closed their connection. |
| 1511 | */ |
| 1512 | if (evcon->flags & EVHTTP_CON_CLOSEDETECT) { |
| 1513 | evcon->flags &= ~EVHTTP_CON_CLOSEDETECT; |
| 1514 | EVUTIL_ASSERT(evcon->http_server == NULL); |
| 1515 | /* For connections from the client, we just |
| 1516 | * reset the connection so that it becomes |
| 1517 | * disconnected. |
| 1518 | */ |
| 1519 | EVUTIL_ASSERT(evcon->state == EVCON_IDLE); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1520 | evhttp_connection_reset_(evcon); |
| 1521 | |
| 1522 | /* |
| 1523 | * If we have no more requests that need completion |
| 1524 | * and we want to auto-free the connection when all |
| 1525 | * requests have been completed. |
| 1526 | */ |
| 1527 | if (TAILQ_FIRST(&evcon->requests) == NULL |
| 1528 | && (evcon->flags & EVHTTP_CON_OUTGOING) |
| 1529 | && (evcon->flags & EVHTTP_CON_AUTOFREE)) { |
| 1530 | evhttp_connection_free(evcon); |
| 1531 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1532 | return; |
| 1533 | } |
| 1534 | |
| 1535 | if (what & BEV_EVENT_TIMEOUT) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1536 | evhttp_connection_fail_(evcon, EVREQ_HTTP_TIMEOUT); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1537 | } else if (what & (BEV_EVENT_EOF|BEV_EVENT_ERROR)) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1538 | if (what & BEV_EVENT_WRITING && |
| 1539 | evcon->flags & EVHTTP_CON_READ_ON_WRITE_ERROR) { |
| 1540 | evhttp_connection_read_on_write_error(evcon, req); |
| 1541 | return; |
| 1542 | } |
| 1543 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1544 | if (what & BEV_EVENT_READING && |
| 1545 | evcon->flags & EVHTTP_CON_READ_ON_WRITE_ERROR && |
| 1546 | evbuffer_get_length(bufferevent_get_input(bufev))) { |
| 1547 | event_deferred_cb_schedule_(get_deferred_queue(evcon), |
| 1548 | &evcon->read_more_deferred_cb); |
| 1549 | return; |
| 1550 | } |
| 1551 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1552 | evhttp_connection_fail_(evcon, EVREQ_HTTP_EOF); |
| 1553 | } else if (what == BEV_EVENT_CONNECTED) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1554 | } else { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1555 | evhttp_connection_fail_(evcon, EVREQ_HTTP_BUFFER_ERROR); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | /* |
| 1560 | * Event callback for asynchronous connection attempt. |
| 1561 | */ |
| 1562 | static void |
| 1563 | evhttp_connection_cb(struct bufferevent *bufev, short what, void *arg) |
| 1564 | { |
| 1565 | struct evhttp_connection *evcon = arg; |
| 1566 | int error; |
| 1567 | ev_socklen_t errsz = sizeof(error); |
| 1568 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1569 | if (evcon->fd == -1) |
| 1570 | evcon->fd = bufferevent_getfd(bufev); |
| 1571 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1572 | if (!(what & BEV_EVENT_CONNECTED)) { |
| 1573 | /* some operating systems return ECONNREFUSED immediately |
| 1574 | * when connecting to a local address. the cleanup is going |
| 1575 | * to reschedule this function call. |
| 1576 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1577 | #ifndef _WIN32 |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1578 | if (errno == ECONNREFUSED) |
| 1579 | goto cleanup; |
| 1580 | #endif |
| 1581 | evhttp_error_cb(bufev, what, arg); |
| 1582 | return; |
| 1583 | } |
| 1584 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1585 | if (evcon->fd == -1) { |
| 1586 | event_debug(("%s: bufferevent_getfd returned -1", |
| 1587 | __func__)); |
| 1588 | goto cleanup; |
| 1589 | } |
| 1590 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1591 | /* Check if the connection completed */ |
| 1592 | if (getsockopt(evcon->fd, SOL_SOCKET, SO_ERROR, (void*)&error, |
| 1593 | &errsz) == -1) { |
| 1594 | event_debug(("%s: getsockopt for \"%s:%d\" on "EV_SOCK_FMT, |
| 1595 | __func__, evcon->address, evcon->port, |
| 1596 | EV_SOCK_ARG(evcon->fd))); |
| 1597 | goto cleanup; |
| 1598 | } |
| 1599 | |
| 1600 | if (error) { |
| 1601 | event_debug(("%s: connect failed for \"%s:%d\" on " |
| 1602 | EV_SOCK_FMT": %s", |
| 1603 | __func__, evcon->address, evcon->port, |
| 1604 | EV_SOCK_ARG(evcon->fd), |
| 1605 | evutil_socket_error_to_string(error))); |
| 1606 | goto cleanup; |
| 1607 | } |
| 1608 | |
| 1609 | /* We are connected to the server now */ |
| 1610 | event_debug(("%s: connected to \"%s:%d\" on "EV_SOCK_FMT"\n", |
| 1611 | __func__, evcon->address, evcon->port, |
| 1612 | EV_SOCK_ARG(evcon->fd))); |
| 1613 | |
| 1614 | /* Reset the retry count as we were successful in connecting */ |
| 1615 | evcon->retry_cnt = 0; |
| 1616 | evcon->state = EVCON_IDLE; |
| 1617 | |
| 1618 | /* reset the bufferevent cbs */ |
| 1619 | bufferevent_setcb(evcon->bufev, |
| 1620 | evhttp_read_cb, |
| 1621 | evhttp_write_cb, |
| 1622 | evhttp_error_cb, |
| 1623 | evcon); |
| 1624 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1625 | if (!evutil_timerisset(&evcon->timeout)) { |
| 1626 | const struct timeval read_tv = { HTTP_READ_TIMEOUT, 0 }; |
| 1627 | const struct timeval write_tv = { HTTP_WRITE_TIMEOUT, 0 }; |
| 1628 | bufferevent_set_timeouts(evcon->bufev, &read_tv, &write_tv); |
| 1629 | } else { |
| 1630 | bufferevent_set_timeouts(evcon->bufev, &evcon->timeout, &evcon->timeout); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1631 | } |
| 1632 | |
| 1633 | /* try to start requests that have queued up on this connection */ |
| 1634 | evhttp_request_dispatch(evcon); |
| 1635 | return; |
| 1636 | |
| 1637 | cleanup: |
| 1638 | evhttp_connection_cb_cleanup(evcon); |
| 1639 | } |
| 1640 | |
| 1641 | /* |
| 1642 | * Check if we got a valid response code. |
| 1643 | */ |
| 1644 | |
| 1645 | static int |
| 1646 | evhttp_valid_response_code(int code) |
| 1647 | { |
| 1648 | if (code == 0) |
| 1649 | return (0); |
| 1650 | |
| 1651 | return (1); |
| 1652 | } |
| 1653 | |
| 1654 | static int |
| 1655 | evhttp_parse_http_version(const char *version, struct evhttp_request *req) |
| 1656 | { |
| 1657 | int major, minor; |
| 1658 | char ch; |
| 1659 | int n = sscanf(version, "HTTP/%d.%d%c", &major, &minor, &ch); |
| 1660 | if (n != 2 || major > 1) { |
| 1661 | event_debug(("%s: bad version %s on message %p from %s", |
| 1662 | __func__, version, req, req->remote_host)); |
| 1663 | return (-1); |
| 1664 | } |
| 1665 | req->major = major; |
| 1666 | req->minor = minor; |
| 1667 | return (0); |
| 1668 | } |
| 1669 | |
| 1670 | /* Parses the status line of a web server */ |
| 1671 | |
| 1672 | static int |
| 1673 | evhttp_parse_response_line(struct evhttp_request *req, char *line) |
| 1674 | { |
| 1675 | char *protocol; |
| 1676 | char *number; |
| 1677 | const char *readable = ""; |
| 1678 | |
| 1679 | protocol = strsep(&line, " "); |
| 1680 | if (line == NULL) |
| 1681 | return (-1); |
| 1682 | number = strsep(&line, " "); |
| 1683 | if (line != NULL) |
| 1684 | readable = line; |
| 1685 | |
| 1686 | if (evhttp_parse_http_version(protocol, req) < 0) |
| 1687 | return (-1); |
| 1688 | |
| 1689 | req->response_code = atoi(number); |
| 1690 | if (!evhttp_valid_response_code(req->response_code)) { |
| 1691 | event_debug(("%s: bad response code \"%s\"", |
| 1692 | __func__, number)); |
| 1693 | return (-1); |
| 1694 | } |
| 1695 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1696 | if (req->response_code_line != NULL) |
| 1697 | mm_free(req->response_code_line); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1698 | if ((req->response_code_line = mm_strdup(readable)) == NULL) { |
| 1699 | event_warn("%s: strdup", __func__); |
| 1700 | return (-1); |
| 1701 | } |
| 1702 | |
| 1703 | return (0); |
| 1704 | } |
| 1705 | |
| 1706 | /* Parse the first line of a HTTP request */ |
| 1707 | |
| 1708 | static int |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1709 | evhttp_parse_request_line(struct evhttp_request *req, char *line, size_t len) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1710 | { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1711 | char *eos = line + len; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1712 | char *method; |
| 1713 | char *uri; |
| 1714 | char *version; |
| 1715 | const char *hostname; |
| 1716 | const char *scheme; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1717 | size_t method_len; |
| 1718 | enum evhttp_cmd_type type; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1719 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1720 | while (eos > line && *(eos-1) == ' ') { |
| 1721 | *(eos-1) = '\0'; |
| 1722 | --eos; |
| 1723 | --len; |
| 1724 | } |
| 1725 | if (len < strlen("GET / HTTP/1.0")) |
| 1726 | return -1; |
| 1727 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1728 | /* Parse the request line */ |
| 1729 | method = strsep(&line, " "); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1730 | if (!line) |
| 1731 | return -1; |
| 1732 | uri = line; |
| 1733 | version = strrchr(uri, ' '); |
| 1734 | if (!version || uri == version) |
| 1735 | return -1; |
| 1736 | *version = '\0'; |
| 1737 | version++; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1738 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1739 | method_len = (uri - method) - 1; |
| 1740 | type = EVHTTP_REQ_UNKNOWN_; |
| 1741 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1742 | /* First line */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1743 | switch (method_len) { |
| 1744 | case 3: |
| 1745 | /* The length of the method string is 3, meaning it can only be one of two methods: GET or PUT */ |
| 1746 | |
| 1747 | /* Since both GET and PUT share the same character 'T' at the end, |
| 1748 | * if the string doesn't have 'T', we can immediately determine this |
| 1749 | * is an invalid HTTP method */ |
| 1750 | |
| 1751 | if (method[2] != 'T') { |
| 1752 | break; |
| 1753 | } |
| 1754 | |
| 1755 | switch (*method) { |
| 1756 | case 'G': |
| 1757 | /* This first byte is 'G', so make sure the next byte is |
| 1758 | * 'E', if it isn't then this isn't a valid method */ |
| 1759 | |
| 1760 | if (method[1] == 'E') { |
| 1761 | type = EVHTTP_REQ_GET; |
| 1762 | } |
| 1763 | |
| 1764 | break; |
| 1765 | case 'P': |
| 1766 | /* First byte is P, check second byte for 'U', if not, |
| 1767 | * we know it's an invalid method */ |
| 1768 | if (method[1] == 'U') { |
| 1769 | type = EVHTTP_REQ_PUT; |
| 1770 | } |
| 1771 | break; |
| 1772 | default: |
| 1773 | break; |
| 1774 | } |
| 1775 | break; |
| 1776 | case 4: |
| 1777 | /* The method length is 4 bytes, leaving only the methods "POST" and "HEAD" */ |
| 1778 | switch (*method) { |
| 1779 | case 'P': |
| 1780 | if (method[3] == 'T' && method[2] == 'S' && method[1] == 'O') { |
| 1781 | type = EVHTTP_REQ_POST; |
| 1782 | } |
| 1783 | break; |
| 1784 | case 'H': |
| 1785 | if (method[3] == 'D' && method[2] == 'A' && method[1] == 'E') { |
| 1786 | type = EVHTTP_REQ_HEAD; |
| 1787 | } |
| 1788 | break; |
| 1789 | default: |
| 1790 | break; |
| 1791 | } |
| 1792 | break; |
| 1793 | case 5: |
| 1794 | /* Method length is 5 bytes, which can only encompass PATCH and TRACE */ |
| 1795 | switch (*method) { |
| 1796 | case 'P': |
| 1797 | if (method[4] == 'H' && method[3] == 'C' && method[2] == 'T' && method[1] == 'A') { |
| 1798 | type = EVHTTP_REQ_PATCH; |
| 1799 | } |
| 1800 | break; |
| 1801 | case 'T': |
| 1802 | if (method[4] == 'E' && method[3] == 'C' && method[2] == 'A' && method[1] == 'R') { |
| 1803 | type = EVHTTP_REQ_TRACE; |
| 1804 | } |
| 1805 | |
| 1806 | break; |
| 1807 | default: |
| 1808 | break; |
| 1809 | } |
| 1810 | break; |
| 1811 | case 6: |
| 1812 | /* Method length is 6, only valid method 6 bytes in length is DELEte */ |
| 1813 | |
| 1814 | /* If the first byte isn't 'D' then it's invalid */ |
| 1815 | if (*method != 'D') { |
| 1816 | break; |
| 1817 | } |
| 1818 | |
| 1819 | if (method[5] == 'E' && method[4] == 'T' && method[3] == 'E' && method[2] == 'L' && method[1] == 'E') { |
| 1820 | type = EVHTTP_REQ_DELETE; |
| 1821 | } |
| 1822 | |
| 1823 | break; |
| 1824 | case 7: |
| 1825 | /* Method length is 7, only valid methods are "OPTIONS" and "CONNECT" */ |
| 1826 | switch (*method) { |
| 1827 | case 'O': |
| 1828 | if (method[6] == 'S' && method[5] == 'N' && method[4] == 'O' && |
| 1829 | method[3] == 'I' && method[2] == 'T' && method[1] == 'P') { |
| 1830 | type = EVHTTP_REQ_OPTIONS; |
| 1831 | } |
| 1832 | |
| 1833 | break; |
| 1834 | case 'C': |
| 1835 | if (method[6] == 'T' && method[5] == 'C' && method[4] == 'E' && |
| 1836 | method[3] == 'N' && method[2] == 'N' && method[1] == 'O') { |
| 1837 | type = EVHTTP_REQ_CONNECT; |
| 1838 | } |
| 1839 | |
| 1840 | break; |
| 1841 | default: |
| 1842 | break; |
| 1843 | } |
| 1844 | break; |
| 1845 | } /* switch */ |
| 1846 | |
| 1847 | if ((int)type == EVHTTP_REQ_UNKNOWN_) { |
| 1848 | event_debug(("%s: bad method %s on request %p from %s", |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1849 | __func__, method, req, req->remote_host)); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1850 | /* No error yet; we'll give a better error later when |
| 1851 | * we see that req->type is unsupported. */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1852 | } |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 1853 | |
| 1854 | req->type = type; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1855 | |
| 1856 | if (evhttp_parse_http_version(version, req) < 0) |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1857 | return -1; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1858 | |
| 1859 | if ((req->uri = mm_strdup(uri)) == NULL) { |
| 1860 | event_debug(("%s: mm_strdup", __func__)); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1861 | return -1; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1862 | } |
| 1863 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1864 | if (type == EVHTTP_REQ_CONNECT) { |
| 1865 | if ((req->uri_elems = evhttp_uri_parse_authority(req->uri)) == NULL) { |
| 1866 | return -1; |
| 1867 | } |
| 1868 | } else { |
| 1869 | if ((req->uri_elems = evhttp_uri_parse_with_flags(req->uri, |
| 1870 | EVHTTP_URI_NONCONFORMANT)) == NULL) { |
| 1871 | return -1; |
| 1872 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1873 | } |
| 1874 | |
| 1875 | /* If we have an absolute-URI, check to see if it is an http request |
| 1876 | for a known vhost or server alias. If we don't know about this |
| 1877 | host, we consider it a proxy request. */ |
| 1878 | scheme = evhttp_uri_get_scheme(req->uri_elems); |
| 1879 | hostname = evhttp_uri_get_host(req->uri_elems); |
| 1880 | if (scheme && (!evutil_ascii_strcasecmp(scheme, "http") || |
| 1881 | !evutil_ascii_strcasecmp(scheme, "https")) && |
| 1882 | hostname && |
| 1883 | !evhttp_find_vhost(req->evcon->http_server, NULL, hostname)) |
| 1884 | req->flags |= EVHTTP_PROXY_REQUEST; |
| 1885 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 1886 | return 0; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1887 | } |
| 1888 | |
| 1889 | const char * |
| 1890 | evhttp_find_header(const struct evkeyvalq *headers, const char *key) |
| 1891 | { |
| 1892 | struct evkeyval *header; |
| 1893 | |
| 1894 | TAILQ_FOREACH(header, headers, next) { |
| 1895 | if (evutil_ascii_strcasecmp(header->key, key) == 0) |
| 1896 | return (header->value); |
| 1897 | } |
| 1898 | |
| 1899 | return (NULL); |
| 1900 | } |
| 1901 | |
| 1902 | void |
| 1903 | evhttp_clear_headers(struct evkeyvalq *headers) |
| 1904 | { |
| 1905 | struct evkeyval *header; |
| 1906 | |
| 1907 | for (header = TAILQ_FIRST(headers); |
| 1908 | header != NULL; |
| 1909 | header = TAILQ_FIRST(headers)) { |
| 1910 | TAILQ_REMOVE(headers, header, next); |
| 1911 | mm_free(header->key); |
| 1912 | mm_free(header->value); |
| 1913 | mm_free(header); |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * Returns 0, if the header was successfully removed. |
| 1919 | * Returns -1, if the header could not be found. |
| 1920 | */ |
| 1921 | |
| 1922 | int |
| 1923 | evhttp_remove_header(struct evkeyvalq *headers, const char *key) |
| 1924 | { |
| 1925 | struct evkeyval *header; |
| 1926 | |
| 1927 | TAILQ_FOREACH(header, headers, next) { |
| 1928 | if (evutil_ascii_strcasecmp(header->key, key) == 0) |
| 1929 | break; |
| 1930 | } |
| 1931 | |
| 1932 | if (header == NULL) |
| 1933 | return (-1); |
| 1934 | |
| 1935 | /* Free and remove the header that we found */ |
| 1936 | TAILQ_REMOVE(headers, header, next); |
| 1937 | mm_free(header->key); |
| 1938 | mm_free(header->value); |
| 1939 | mm_free(header); |
| 1940 | |
| 1941 | return (0); |
| 1942 | } |
| 1943 | |
| 1944 | static int |
| 1945 | evhttp_header_is_valid_value(const char *value) |
| 1946 | { |
| 1947 | const char *p = value; |
| 1948 | |
| 1949 | while ((p = strpbrk(p, "\r\n")) != NULL) { |
| 1950 | /* we really expect only one new line */ |
| 1951 | p += strspn(p, "\r\n"); |
| 1952 | /* we expect a space or tab for continuation */ |
| 1953 | if (*p != ' ' && *p != '\t') |
| 1954 | return (0); |
| 1955 | } |
| 1956 | return (1); |
| 1957 | } |
| 1958 | |
| 1959 | int |
| 1960 | evhttp_add_header(struct evkeyvalq *headers, |
| 1961 | const char *key, const char *value) |
| 1962 | { |
| 1963 | event_debug(("%s: key: %s val: %s\n", __func__, key, value)); |
| 1964 | |
| 1965 | if (strchr(key, '\r') != NULL || strchr(key, '\n') != NULL) { |
| 1966 | /* drop illegal headers */ |
| 1967 | event_debug(("%s: dropping illegal header key\n", __func__)); |
| 1968 | return (-1); |
| 1969 | } |
| 1970 | |
| 1971 | if (!evhttp_header_is_valid_value(value)) { |
| 1972 | event_debug(("%s: dropping illegal header value\n", __func__)); |
| 1973 | return (-1); |
| 1974 | } |
| 1975 | |
| 1976 | return (evhttp_add_header_internal(headers, key, value)); |
| 1977 | } |
| 1978 | |
| 1979 | static int |
| 1980 | evhttp_add_header_internal(struct evkeyvalq *headers, |
| 1981 | const char *key, const char *value) |
| 1982 | { |
| 1983 | struct evkeyval *header = mm_calloc(1, sizeof(struct evkeyval)); |
| 1984 | if (header == NULL) { |
| 1985 | event_warn("%s: calloc", __func__); |
| 1986 | return (-1); |
| 1987 | } |
| 1988 | if ((header->key = mm_strdup(key)) == NULL) { |
| 1989 | mm_free(header); |
| 1990 | event_warn("%s: strdup", __func__); |
| 1991 | return (-1); |
| 1992 | } |
| 1993 | if ((header->value = mm_strdup(value)) == NULL) { |
| 1994 | mm_free(header->key); |
| 1995 | mm_free(header); |
| 1996 | event_warn("%s: strdup", __func__); |
| 1997 | return (-1); |
| 1998 | } |
| 1999 | |
| 2000 | TAILQ_INSERT_TAIL(headers, header, next); |
| 2001 | |
| 2002 | return (0); |
| 2003 | } |
| 2004 | |
| 2005 | /* |
| 2006 | * Parses header lines from a request or a response into the specified |
| 2007 | * request object given an event buffer. |
| 2008 | * |
| 2009 | * Returns |
| 2010 | * DATA_CORRUPTED on error |
| 2011 | * MORE_DATA_EXPECTED when we need to read more headers |
| 2012 | * ALL_DATA_READ when all headers have been read. |
| 2013 | */ |
| 2014 | |
| 2015 | enum message_read_status |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2016 | evhttp_parse_firstline_(struct evhttp_request *req, struct evbuffer *buffer) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2017 | { |
| 2018 | char *line; |
| 2019 | enum message_read_status status = ALL_DATA_READ; |
| 2020 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2021 | size_t len; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2022 | /* XXX try */ |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2023 | line = evbuffer_readln(buffer, &len, EVBUFFER_EOL_CRLF); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2024 | if (line == NULL) { |
| 2025 | if (req->evcon != NULL && |
| 2026 | evbuffer_get_length(buffer) > req->evcon->max_headers_size) |
| 2027 | return (DATA_TOO_LONG); |
| 2028 | else |
| 2029 | return (MORE_DATA_EXPECTED); |
| 2030 | } |
| 2031 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2032 | if (req->evcon != NULL && len > req->evcon->max_headers_size) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2033 | mm_free(line); |
| 2034 | return (DATA_TOO_LONG); |
| 2035 | } |
| 2036 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2037 | req->headers_size = len; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2038 | |
| 2039 | switch (req->kind) { |
| 2040 | case EVHTTP_REQUEST: |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2041 | if (evhttp_parse_request_line(req, line, len) == -1) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2042 | status = DATA_CORRUPTED; |
| 2043 | break; |
| 2044 | case EVHTTP_RESPONSE: |
| 2045 | if (evhttp_parse_response_line(req, line) == -1) |
| 2046 | status = DATA_CORRUPTED; |
| 2047 | break; |
| 2048 | default: |
| 2049 | status = DATA_CORRUPTED; |
| 2050 | } |
| 2051 | |
| 2052 | mm_free(line); |
| 2053 | return (status); |
| 2054 | } |
| 2055 | |
| 2056 | static int |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2057 | evhttp_append_to_last_header(struct evkeyvalq *headers, char *line) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2058 | { |
| 2059 | struct evkeyval *header = TAILQ_LAST(headers, evkeyvalq); |
| 2060 | char *newval; |
| 2061 | size_t old_len, line_len; |
| 2062 | |
| 2063 | if (header == NULL) |
| 2064 | return (-1); |
| 2065 | |
| 2066 | old_len = strlen(header->value); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2067 | |
| 2068 | /* Strip space from start and end of line. */ |
| 2069 | while (*line == ' ' || *line == '\t') |
| 2070 | ++line; |
| 2071 | evutil_rtrim_lws_(line); |
| 2072 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2073 | line_len = strlen(line); |
| 2074 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2075 | newval = mm_realloc(header->value, old_len + line_len + 2); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2076 | if (newval == NULL) |
| 2077 | return (-1); |
| 2078 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2079 | newval[old_len] = ' '; |
| 2080 | memcpy(newval + old_len + 1, line, line_len + 1); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2081 | header->value = newval; |
| 2082 | |
| 2083 | return (0); |
| 2084 | } |
| 2085 | |
| 2086 | enum message_read_status |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2087 | evhttp_parse_headers_(struct evhttp_request *req, struct evbuffer* buffer) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2088 | { |
| 2089 | enum message_read_status errcode = DATA_CORRUPTED; |
| 2090 | char *line; |
| 2091 | enum message_read_status status = MORE_DATA_EXPECTED; |
| 2092 | |
| 2093 | struct evkeyvalq* headers = req->input_headers; |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2094 | size_t len; |
| 2095 | while ((line = evbuffer_readln(buffer, &len, EVBUFFER_EOL_CRLF)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2096 | != NULL) { |
| 2097 | char *skey, *svalue; |
| 2098 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2099 | req->headers_size += len; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2100 | |
| 2101 | if (req->evcon != NULL && |
| 2102 | req->headers_size > req->evcon->max_headers_size) { |
| 2103 | errcode = DATA_TOO_LONG; |
| 2104 | goto error; |
| 2105 | } |
| 2106 | |
| 2107 | if (*line == '\0') { /* Last header - Done */ |
| 2108 | status = ALL_DATA_READ; |
| 2109 | mm_free(line); |
| 2110 | break; |
| 2111 | } |
| 2112 | |
| 2113 | /* Check if this is a continuation line */ |
| 2114 | if (*line == ' ' || *line == '\t') { |
| 2115 | if (evhttp_append_to_last_header(headers, line) == -1) |
| 2116 | goto error; |
| 2117 | mm_free(line); |
| 2118 | continue; |
| 2119 | } |
| 2120 | |
| 2121 | /* Processing of header lines */ |
| 2122 | svalue = line; |
| 2123 | skey = strsep(&svalue, ":"); |
| 2124 | if (svalue == NULL) |
| 2125 | goto error; |
| 2126 | |
| 2127 | svalue += strspn(svalue, " "); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2128 | evutil_rtrim_lws_(svalue); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2129 | |
| 2130 | if (evhttp_add_header(headers, skey, svalue) == -1) |
| 2131 | goto error; |
| 2132 | |
| 2133 | mm_free(line); |
| 2134 | } |
| 2135 | |
| 2136 | if (status == MORE_DATA_EXPECTED) { |
| 2137 | if (req->evcon != NULL && |
| 2138 | req->headers_size + evbuffer_get_length(buffer) > req->evcon->max_headers_size) |
| 2139 | return (DATA_TOO_LONG); |
| 2140 | } |
| 2141 | |
| 2142 | return (status); |
| 2143 | |
| 2144 | error: |
| 2145 | mm_free(line); |
| 2146 | return (errcode); |
| 2147 | } |
| 2148 | |
| 2149 | static int |
| 2150 | evhttp_get_body_length(struct evhttp_request *req) |
| 2151 | { |
| 2152 | struct evkeyvalq *headers = req->input_headers; |
| 2153 | const char *content_length; |
| 2154 | const char *connection; |
| 2155 | |
| 2156 | content_length = evhttp_find_header(headers, "Content-Length"); |
| 2157 | connection = evhttp_find_header(headers, "Connection"); |
| 2158 | |
| 2159 | if (content_length == NULL && connection == NULL) |
| 2160 | req->ntoread = -1; |
| 2161 | else if (content_length == NULL && |
| 2162 | evutil_ascii_strcasecmp(connection, "Close") != 0) { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2163 | req->ntoread = 0; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2164 | } else if (content_length == NULL) { |
| 2165 | req->ntoread = -1; |
| 2166 | } else { |
| 2167 | char *endp; |
| 2168 | ev_int64_t ntoread = evutil_strtoll(content_length, &endp, 10); |
| 2169 | if (*content_length == '\0' || *endp != '\0' || ntoread < 0) { |
| 2170 | event_debug(("%s: illegal content length: %s", |
| 2171 | __func__, content_length)); |
| 2172 | return (-1); |
| 2173 | } |
| 2174 | req->ntoread = ntoread; |
| 2175 | } |
| 2176 | |
| 2177 | event_debug(("%s: bytes to read: "EV_I64_FMT" (in buffer "EV_SIZE_FMT")\n", |
| 2178 | __func__, EV_I64_ARG(req->ntoread), |
| 2179 | EV_SIZE_ARG(evbuffer_get_length(bufferevent_get_input(req->evcon->bufev))))); |
| 2180 | |
| 2181 | return (0); |
| 2182 | } |
| 2183 | |
| 2184 | static int |
| 2185 | evhttp_method_may_have_body(enum evhttp_cmd_type type) |
| 2186 | { |
| 2187 | switch (type) { |
| 2188 | case EVHTTP_REQ_POST: |
| 2189 | case EVHTTP_REQ_PUT: |
| 2190 | case EVHTTP_REQ_PATCH: |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2191 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2192 | case EVHTTP_REQ_GET: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2193 | case EVHTTP_REQ_DELETE: |
| 2194 | case EVHTTP_REQ_OPTIONS: |
| 2195 | case EVHTTP_REQ_CONNECT: |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2196 | return 1; |
| 2197 | |
| 2198 | case EVHTTP_REQ_TRACE: |
| 2199 | case EVHTTP_REQ_HEAD: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2200 | default: |
| 2201 | return 0; |
| 2202 | } |
| 2203 | } |
| 2204 | |
| 2205 | static void |
| 2206 | evhttp_get_body(struct evhttp_connection *evcon, struct evhttp_request *req) |
| 2207 | { |
| 2208 | const char *xfer_enc; |
| 2209 | |
| 2210 | /* If this is a request without a body, then we are done */ |
| 2211 | if (req->kind == EVHTTP_REQUEST && |
| 2212 | !evhttp_method_may_have_body(req->type)) { |
| 2213 | evhttp_connection_done(evcon); |
| 2214 | return; |
| 2215 | } |
| 2216 | evcon->state = EVCON_READING_BODY; |
| 2217 | xfer_enc = evhttp_find_header(req->input_headers, "Transfer-Encoding"); |
| 2218 | if (xfer_enc != NULL && evutil_ascii_strcasecmp(xfer_enc, "chunked") == 0) { |
| 2219 | req->chunked = 1; |
| 2220 | req->ntoread = -1; |
| 2221 | } else { |
| 2222 | if (evhttp_get_body_length(req) == -1) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2223 | evhttp_connection_fail_(evcon, EVREQ_HTTP_INVALID_HEADER); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2224 | return; |
| 2225 | } |
| 2226 | if (req->kind == EVHTTP_REQUEST && req->ntoread < 1) { |
| 2227 | /* An incoming request with no content-length and no |
| 2228 | * transfer-encoding has no body. */ |
| 2229 | evhttp_connection_done(evcon); |
| 2230 | return; |
| 2231 | } |
| 2232 | } |
| 2233 | |
| 2234 | /* Should we send a 100 Continue status line? */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2235 | switch (evhttp_have_expect(req, 1)) { |
| 2236 | case CONTINUE: |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2237 | /* XXX It would be nice to do some sanity |
| 2238 | checking here. Does the resource exist? |
| 2239 | Should the resource accept post requests? If |
| 2240 | no, we should respond with an error. For |
| 2241 | now, just optimistically tell the client to |
| 2242 | send their message body. */ |
| 2243 | if (req->ntoread > 0) { |
| 2244 | /* ntoread is ev_int64_t, max_body_size is ev_uint64_t */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2245 | if ((req->evcon->max_body_size <= EV_INT64_MAX) && |
| 2246 | (ev_uint64_t)req->ntoread > req->evcon->max_body_size) { |
| 2247 | evhttp_lingering_fail(evcon, req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2248 | return; |
| 2249 | } |
| 2250 | } |
| 2251 | if (!evbuffer_get_length(bufferevent_get_input(evcon->bufev))) |
| 2252 | evhttp_send_continue(evcon, req); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2253 | break; |
| 2254 | case OTHER: |
| 2255 | evhttp_send_error(req, HTTP_EXPECTATIONFAILED, NULL); |
| 2256 | return; |
| 2257 | case NO: break; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2258 | } |
| 2259 | |
| 2260 | evhttp_read_body(evcon, req); |
| 2261 | /* note the request may have been freed in evhttp_read_body */ |
| 2262 | } |
| 2263 | |
| 2264 | static void |
| 2265 | evhttp_read_firstline(struct evhttp_connection *evcon, |
| 2266 | struct evhttp_request *req) |
| 2267 | { |
| 2268 | enum message_read_status res; |
| 2269 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2270 | res = evhttp_parse_firstline_(req, bufferevent_get_input(evcon->bufev)); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2271 | if (res == DATA_CORRUPTED || res == DATA_TOO_LONG) { |
| 2272 | /* Error while reading, terminate */ |
| 2273 | event_debug(("%s: bad header lines on "EV_SOCK_FMT"\n", |
| 2274 | __func__, EV_SOCK_ARG(evcon->fd))); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2275 | evhttp_connection_fail_(evcon, EVREQ_HTTP_INVALID_HEADER); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2276 | return; |
| 2277 | } else if (res == MORE_DATA_EXPECTED) { |
| 2278 | /* Need more header lines */ |
| 2279 | return; |
| 2280 | } |
| 2281 | |
| 2282 | evcon->state = EVCON_READING_HEADERS; |
| 2283 | evhttp_read_header(evcon, req); |
| 2284 | } |
| 2285 | |
| 2286 | static void |
| 2287 | evhttp_read_header(struct evhttp_connection *evcon, |
| 2288 | struct evhttp_request *req) |
| 2289 | { |
| 2290 | enum message_read_status res; |
| 2291 | evutil_socket_t fd = evcon->fd; |
| 2292 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2293 | res = evhttp_parse_headers_(req, bufferevent_get_input(evcon->bufev)); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2294 | if (res == DATA_CORRUPTED || res == DATA_TOO_LONG) { |
| 2295 | /* Error while reading, terminate */ |
| 2296 | event_debug(("%s: bad header lines on "EV_SOCK_FMT"\n", |
| 2297 | __func__, EV_SOCK_ARG(fd))); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2298 | evhttp_connection_fail_(evcon, EVREQ_HTTP_INVALID_HEADER); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2299 | return; |
| 2300 | } else if (res == MORE_DATA_EXPECTED) { |
| 2301 | /* Need more header lines */ |
| 2302 | return; |
| 2303 | } |
| 2304 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2305 | /* Callback can shut down connection with negative return value */ |
| 2306 | if (req->header_cb != NULL) { |
| 2307 | if ((*req->header_cb)(req, req->cb_arg) < 0) { |
| 2308 | evhttp_connection_fail_(evcon, EVREQ_HTTP_EOF); |
| 2309 | return; |
| 2310 | } |
| 2311 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2312 | |
| 2313 | /* Done reading headers, do the real work */ |
| 2314 | switch (req->kind) { |
| 2315 | case EVHTTP_REQUEST: |
| 2316 | event_debug(("%s: checking for post data on "EV_SOCK_FMT"\n", |
| 2317 | __func__, EV_SOCK_ARG(fd))); |
| 2318 | evhttp_get_body(evcon, req); |
| 2319 | /* note the request may have been freed in evhttp_get_body */ |
| 2320 | break; |
| 2321 | |
| 2322 | case EVHTTP_RESPONSE: |
| 2323 | /* Start over if we got a 100 Continue response. */ |
| 2324 | if (req->response_code == 100) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2325 | struct evbuffer *output = bufferevent_get_output(evcon->bufev); |
| 2326 | evbuffer_add_buffer(output, req->output_buffer); |
| 2327 | evhttp_start_write_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2328 | return; |
| 2329 | } |
| 2330 | if (!evhttp_response_needs_body(req)) { |
| 2331 | event_debug(("%s: skipping body for code %d\n", |
| 2332 | __func__, req->response_code)); |
| 2333 | evhttp_connection_done(evcon); |
| 2334 | } else { |
| 2335 | event_debug(("%s: start of read body for %s on " |
| 2336 | EV_SOCK_FMT"\n", |
| 2337 | __func__, req->remote_host, EV_SOCK_ARG(fd))); |
| 2338 | evhttp_get_body(evcon, req); |
| 2339 | /* note the request may have been freed in |
| 2340 | * evhttp_get_body */ |
| 2341 | } |
| 2342 | break; |
| 2343 | |
| 2344 | default: |
| 2345 | event_warnx("%s: bad header on "EV_SOCK_FMT, __func__, |
| 2346 | EV_SOCK_ARG(fd)); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2347 | evhttp_connection_fail_(evcon, EVREQ_HTTP_INVALID_HEADER); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2348 | break; |
| 2349 | } |
| 2350 | /* request may have been freed above */ |
| 2351 | } |
| 2352 | |
| 2353 | /* |
| 2354 | * Creates a TCP connection to the specified port and executes a callback |
| 2355 | * when finished. Failure or success is indicate by the passed connection |
| 2356 | * object. |
| 2357 | * |
| 2358 | * Although this interface accepts a hostname, it is intended to take |
| 2359 | * only numeric hostnames so that non-blocking DNS resolution can |
| 2360 | * happen elsewhere. |
| 2361 | */ |
| 2362 | |
| 2363 | struct evhttp_connection * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2364 | evhttp_connection_new(const char *address, ev_uint16_t port) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2365 | { |
| 2366 | return (evhttp_connection_base_new(NULL, NULL, address, port)); |
| 2367 | } |
| 2368 | |
| 2369 | struct evhttp_connection * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2370 | evhttp_connection_base_bufferevent_new(struct event_base *base, struct evdns_base *dnsbase, struct bufferevent* bev, |
| 2371 | const char *address, ev_uint16_t port) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2372 | { |
| 2373 | struct evhttp_connection *evcon = NULL; |
| 2374 | |
| 2375 | event_debug(("Attempting connection to %s:%d\n", address, port)); |
| 2376 | |
| 2377 | if ((evcon = mm_calloc(1, sizeof(struct evhttp_connection))) == NULL) { |
| 2378 | event_warn("%s: calloc failed", __func__); |
| 2379 | goto error; |
| 2380 | } |
| 2381 | |
| 2382 | evcon->fd = -1; |
| 2383 | evcon->port = port; |
| 2384 | |
| 2385 | evcon->max_headers_size = EV_SIZE_MAX; |
| 2386 | evcon->max_body_size = EV_SIZE_MAX; |
| 2387 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2388 | evutil_timerclear(&evcon->timeout); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2389 | evcon->retry_cnt = evcon->retry_max = 0; |
| 2390 | |
| 2391 | if ((evcon->address = mm_strdup(address)) == NULL) { |
| 2392 | event_warn("%s: strdup failed", __func__); |
| 2393 | goto error; |
| 2394 | } |
| 2395 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2396 | if (bev == NULL) { |
| 2397 | if (!(bev = bufferevent_socket_new(base, -1, 0))) { |
| 2398 | event_warn("%s: bufferevent_socket_new failed", __func__); |
| 2399 | goto error; |
| 2400 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2401 | } |
| 2402 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2403 | bufferevent_setcb(bev, evhttp_read_cb, evhttp_write_cb, evhttp_error_cb, evcon); |
| 2404 | evcon->bufev = bev; |
| 2405 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2406 | evcon->state = EVCON_DISCONNECTED; |
| 2407 | TAILQ_INIT(&evcon->requests); |
| 2408 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2409 | evcon->initial_retry_timeout.tv_sec = 2; |
| 2410 | evcon->initial_retry_timeout.tv_usec = 0; |
| 2411 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2412 | if (base != NULL) { |
| 2413 | evcon->base = base; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2414 | if (bufferevent_get_base(bev) != base) |
| 2415 | bufferevent_base_set(base, evcon->bufev); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2416 | } |
| 2417 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2418 | event_deferred_cb_init_( |
| 2419 | &evcon->read_more_deferred_cb, |
| 2420 | bufferevent_get_priority(bev), |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2421 | evhttp_deferred_read_cb, evcon); |
| 2422 | |
| 2423 | evcon->dns_base = dnsbase; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2424 | evcon->ai_family = AF_UNSPEC; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2425 | |
| 2426 | return (evcon); |
| 2427 | |
| 2428 | error: |
| 2429 | if (evcon != NULL) |
| 2430 | evhttp_connection_free(evcon); |
| 2431 | return (NULL); |
| 2432 | } |
| 2433 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2434 | struct bufferevent* evhttp_connection_get_bufferevent(struct evhttp_connection *evcon) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2435 | { |
| 2436 | return evcon->bufev; |
| 2437 | } |
| 2438 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2439 | struct evhttp * |
| 2440 | evhttp_connection_get_server(struct evhttp_connection *evcon) |
| 2441 | { |
| 2442 | return evcon->http_server; |
| 2443 | } |
| 2444 | |
| 2445 | struct evhttp_connection * |
| 2446 | evhttp_connection_base_new(struct event_base *base, struct evdns_base *dnsbase, |
| 2447 | const char *address, ev_uint16_t port) |
| 2448 | { |
| 2449 | return evhttp_connection_base_bufferevent_new(base, dnsbase, NULL, address, port); |
| 2450 | } |
| 2451 | |
| 2452 | void evhttp_connection_set_family(struct evhttp_connection *evcon, |
| 2453 | int family) |
| 2454 | { |
| 2455 | evcon->ai_family = family; |
| 2456 | } |
| 2457 | |
| 2458 | int evhttp_connection_set_flags(struct evhttp_connection *evcon, |
| 2459 | int flags) |
| 2460 | { |
| 2461 | int avail_flags = 0; |
| 2462 | avail_flags |= EVHTTP_CON_REUSE_CONNECTED_ADDR; |
| 2463 | avail_flags |= EVHTTP_CON_READ_ON_WRITE_ERROR; |
| 2464 | |
| 2465 | if (flags & ~avail_flags || flags > EVHTTP_CON_PUBLIC_FLAGS_END) |
| 2466 | return 1; |
| 2467 | evcon->flags &= ~avail_flags; |
| 2468 | |
| 2469 | evcon->flags |= flags; |
| 2470 | |
| 2471 | return 0; |
| 2472 | } |
| 2473 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2474 | void |
| 2475 | evhttp_connection_set_base(struct evhttp_connection *evcon, |
| 2476 | struct event_base *base) |
| 2477 | { |
| 2478 | EVUTIL_ASSERT(evcon->base == NULL); |
| 2479 | EVUTIL_ASSERT(evcon->state == EVCON_DISCONNECTED); |
| 2480 | evcon->base = base; |
| 2481 | bufferevent_base_set(base, evcon->bufev); |
| 2482 | } |
| 2483 | |
| 2484 | void |
| 2485 | evhttp_connection_set_timeout(struct evhttp_connection *evcon, |
| 2486 | int timeout_in_secs) |
| 2487 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2488 | if (timeout_in_secs == -1) |
| 2489 | evhttp_connection_set_timeout_tv(evcon, NULL); |
| 2490 | else { |
| 2491 | struct timeval tv; |
| 2492 | tv.tv_sec = timeout_in_secs; |
| 2493 | tv.tv_usec = 0; |
| 2494 | evhttp_connection_set_timeout_tv(evcon, &tv); |
| 2495 | } |
| 2496 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2497 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2498 | void |
| 2499 | evhttp_connection_set_timeout_tv(struct evhttp_connection *evcon, |
| 2500 | const struct timeval* tv) |
| 2501 | { |
| 2502 | if (tv) { |
| 2503 | evcon->timeout = *tv; |
| 2504 | bufferevent_set_timeouts(evcon->bufev, &evcon->timeout, &evcon->timeout); |
| 2505 | } else { |
| 2506 | const struct timeval read_tv = { HTTP_READ_TIMEOUT, 0 }; |
| 2507 | const struct timeval write_tv = { HTTP_WRITE_TIMEOUT, 0 }; |
| 2508 | evutil_timerclear(&evcon->timeout); |
| 2509 | bufferevent_set_timeouts(evcon->bufev, &read_tv, &write_tv); |
| 2510 | } |
| 2511 | } |
| 2512 | |
| 2513 | void |
| 2514 | evhttp_connection_set_initial_retry_tv(struct evhttp_connection *evcon, |
| 2515 | const struct timeval *tv) |
| 2516 | { |
| 2517 | if (tv) { |
| 2518 | evcon->initial_retry_timeout = *tv; |
| 2519 | } else { |
| 2520 | evutil_timerclear(&evcon->initial_retry_timeout); |
| 2521 | evcon->initial_retry_timeout.tv_sec = 2; |
| 2522 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2523 | } |
| 2524 | |
| 2525 | void |
| 2526 | evhttp_connection_set_retries(struct evhttp_connection *evcon, |
| 2527 | int retry_max) |
| 2528 | { |
| 2529 | evcon->retry_max = retry_max; |
| 2530 | } |
| 2531 | |
| 2532 | void |
| 2533 | evhttp_connection_set_closecb(struct evhttp_connection *evcon, |
| 2534 | void (*cb)(struct evhttp_connection *, void *), void *cbarg) |
| 2535 | { |
| 2536 | evcon->closecb = cb; |
| 2537 | evcon->closecb_arg = cbarg; |
| 2538 | } |
| 2539 | |
| 2540 | void |
| 2541 | evhttp_connection_get_peer(struct evhttp_connection *evcon, |
| 2542 | char **address, ev_uint16_t *port) |
| 2543 | { |
| 2544 | *address = evcon->address; |
| 2545 | *port = evcon->port; |
| 2546 | } |
| 2547 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2548 | const struct sockaddr* |
| 2549 | evhttp_connection_get_addr(struct evhttp_connection *evcon) |
| 2550 | { |
| 2551 | return bufferevent_socket_get_conn_address_(evcon->bufev); |
| 2552 | } |
| 2553 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2554 | int |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2555 | evhttp_connection_connect_(struct evhttp_connection *evcon) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2556 | { |
| 2557 | int old_state = evcon->state; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2558 | const char *address = evcon->address; |
| 2559 | const struct sockaddr *sa = evhttp_connection_get_addr(evcon); |
| 2560 | int ret; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2561 | |
| 2562 | if (evcon->state == EVCON_CONNECTING) |
| 2563 | return (0); |
| 2564 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2565 | evhttp_connection_reset_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2566 | |
| 2567 | EVUTIL_ASSERT(!(evcon->flags & EVHTTP_CON_INCOMING)); |
| 2568 | evcon->flags |= EVHTTP_CON_OUTGOING; |
| 2569 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2570 | if (evcon->bind_address || evcon->bind_port) { |
| 2571 | evcon->fd = bind_socket( |
| 2572 | evcon->bind_address, evcon->bind_port, 0 /*reuse*/); |
| 2573 | if (evcon->fd == -1) { |
| 2574 | event_debug(("%s: failed to bind to \"%s\"", |
| 2575 | __func__, evcon->bind_address)); |
| 2576 | return (-1); |
| 2577 | } |
| 2578 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2579 | if (bufferevent_setfd(evcon->bufev, evcon->fd)) |
| 2580 | return (-1); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2581 | } else { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2582 | if (bufferevent_setfd(evcon->bufev, -1)) |
| 2583 | return (-1); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2584 | } |
| 2585 | |
| 2586 | /* Set up a callback for successful connection setup */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2587 | bufferevent_setcb(evcon->bufev, |
| 2588 | NULL /* evhttp_read_cb */, |
| 2589 | NULL /* evhttp_write_cb */, |
| 2590 | evhttp_connection_cb, |
| 2591 | evcon); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2592 | if (!evutil_timerisset(&evcon->timeout)) { |
| 2593 | const struct timeval conn_tv = { HTTP_CONNECT_TIMEOUT, 0 }; |
| 2594 | bufferevent_set_timeouts(evcon->bufev, &conn_tv, &conn_tv); |
| 2595 | } else { |
| 2596 | bufferevent_set_timeouts(evcon->bufev, &evcon->timeout, &evcon->timeout); |
| 2597 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2598 | /* make sure that we get a write callback */ |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2599 | if (bufferevent_enable(evcon->bufev, EV_WRITE)) |
| 2600 | return (-1); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2601 | |
| 2602 | evcon->state = EVCON_CONNECTING; |
| 2603 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2604 | if (evcon->flags & EVHTTP_CON_REUSE_CONNECTED_ADDR && |
| 2605 | sa && |
| 2606 | (sa->sa_family == AF_INET || sa->sa_family == AF_INET6)) { |
| 2607 | int socklen = sizeof(struct sockaddr_in); |
| 2608 | if (sa->sa_family == AF_INET6) { |
| 2609 | socklen = sizeof(struct sockaddr_in6); |
| 2610 | } |
| 2611 | ret = bufferevent_socket_connect(evcon->bufev, sa, socklen); |
| 2612 | } else { |
| 2613 | ret = bufferevent_socket_connect_hostname(evcon->bufev, |
| 2614 | evcon->dns_base, evcon->ai_family, address, evcon->port); |
| 2615 | } |
| 2616 | |
| 2617 | if (ret < 0) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2618 | evcon->state = old_state; |
| 2619 | event_sock_warn(evcon->fd, "%s: connection to \"%s\" failed", |
| 2620 | __func__, evcon->address); |
| 2621 | /* some operating systems return ECONNREFUSED immediately |
| 2622 | * when connecting to a local address. the cleanup is going |
| 2623 | * to reschedule this function call. |
| 2624 | */ |
| 2625 | evhttp_connection_cb_cleanup(evcon); |
| 2626 | return (0); |
| 2627 | } |
| 2628 | |
| 2629 | return (0); |
| 2630 | } |
| 2631 | |
| 2632 | /* |
| 2633 | * Starts an HTTP request on the provided evhttp_connection object. |
| 2634 | * If the connection object is not connected to the web server already, |
| 2635 | * this will start the connection. |
| 2636 | */ |
| 2637 | |
| 2638 | int |
| 2639 | evhttp_make_request(struct evhttp_connection *evcon, |
| 2640 | struct evhttp_request *req, |
| 2641 | enum evhttp_cmd_type type, const char *uri) |
| 2642 | { |
| 2643 | /* We are making a request */ |
| 2644 | req->kind = EVHTTP_REQUEST; |
| 2645 | req->type = type; |
| 2646 | if (req->uri != NULL) |
| 2647 | mm_free(req->uri); |
| 2648 | if ((req->uri = mm_strdup(uri)) == NULL) { |
| 2649 | event_warn("%s: strdup", __func__); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2650 | evhttp_request_free_auto(req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2651 | return (-1); |
| 2652 | } |
| 2653 | |
| 2654 | /* Set the protocol version if it is not supplied */ |
| 2655 | if (!req->major && !req->minor) { |
| 2656 | req->major = 1; |
| 2657 | req->minor = 1; |
| 2658 | } |
| 2659 | |
| 2660 | EVUTIL_ASSERT(req->evcon == NULL); |
| 2661 | req->evcon = evcon; |
| 2662 | EVUTIL_ASSERT(!(req->flags & EVHTTP_REQ_OWN_CONNECTION)); |
| 2663 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2664 | TAILQ_INSERT_TAIL(&evcon->requests, req, next); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2665 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2666 | /* We do not want to conflict with retry_ev */ |
| 2667 | if (evcon->retry_cnt) |
| 2668 | return (0); |
| 2669 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2670 | /* If the connection object is not connected; make it so */ |
| 2671 | if (!evhttp_connected(evcon)) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2672 | int res = evhttp_connection_connect_(evcon); |
| 2673 | /* evhttp_connection_fail_(), which is called through |
| 2674 | * evhttp_connection_connect_(), assumes that req lies in |
| 2675 | * evcon->requests. Thus, enqueue the request in advance and |
| 2676 | * remove it in the error case. */ |
| 2677 | if (res != 0) |
| 2678 | TAILQ_REMOVE(&evcon->requests, req, next); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2679 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2680 | return (res); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2681 | } |
| 2682 | |
| 2683 | /* |
| 2684 | * If it's connected already and we are the first in the queue, |
| 2685 | * then we can dispatch this request immediately. Otherwise, it |
| 2686 | * will be dispatched once the pending requests are completed. |
| 2687 | */ |
| 2688 | if (TAILQ_FIRST(&evcon->requests) == req) |
| 2689 | evhttp_request_dispatch(evcon); |
| 2690 | |
| 2691 | return (0); |
| 2692 | } |
| 2693 | |
| 2694 | void |
| 2695 | evhttp_cancel_request(struct evhttp_request *req) |
| 2696 | { |
| 2697 | struct evhttp_connection *evcon = req->evcon; |
| 2698 | if (evcon != NULL) { |
| 2699 | /* We need to remove it from the connection */ |
| 2700 | if (TAILQ_FIRST(&evcon->requests) == req) { |
| 2701 | /* it's currently being worked on, so reset |
| 2702 | * the connection. |
| 2703 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2704 | evhttp_connection_fail_(evcon, |
| 2705 | EVREQ_HTTP_REQUEST_CANCEL); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2706 | |
| 2707 | /* connection fail freed the request */ |
| 2708 | return; |
| 2709 | } else { |
| 2710 | /* otherwise, we can just remove it from the |
| 2711 | * queue |
| 2712 | */ |
| 2713 | TAILQ_REMOVE(&evcon->requests, req, next); |
| 2714 | } |
| 2715 | } |
| 2716 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2717 | evhttp_request_free_auto(req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2718 | } |
| 2719 | |
| 2720 | /* |
| 2721 | * Reads data from file descriptor into request structure |
| 2722 | * Request structure needs to be set up correctly. |
| 2723 | */ |
| 2724 | |
| 2725 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2726 | evhttp_start_read_(struct evhttp_connection *evcon) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2727 | { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2728 | bufferevent_disable(evcon->bufev, EV_WRITE); |
| 2729 | bufferevent_enable(evcon->bufev, EV_READ); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2730 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2731 | evcon->state = EVCON_READING_FIRSTLINE; |
| 2732 | /* Reset the bufferevent callbacks */ |
| 2733 | bufferevent_setcb(evcon->bufev, |
| 2734 | evhttp_read_cb, |
| 2735 | evhttp_write_cb, |
| 2736 | evhttp_error_cb, |
| 2737 | evcon); |
| 2738 | |
| 2739 | /* If there's still data pending, process it next time through the |
| 2740 | * loop. Don't do it now; that could get recusive. */ |
| 2741 | if (evbuffer_get_length(bufferevent_get_input(evcon->bufev))) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2742 | event_deferred_cb_schedule_(get_deferred_queue(evcon), |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2743 | &evcon->read_more_deferred_cb); |
| 2744 | } |
| 2745 | } |
| 2746 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2747 | void |
| 2748 | evhttp_start_write_(struct evhttp_connection *evcon) |
| 2749 | { |
| 2750 | bufferevent_disable(evcon->bufev, EV_WRITE); |
| 2751 | bufferevent_enable(evcon->bufev, EV_READ); |
| 2752 | |
| 2753 | evcon->state = EVCON_WRITING; |
| 2754 | evhttp_write_buffer(evcon, evhttp_write_connectioncb, NULL); |
| 2755 | } |
| 2756 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2757 | static void |
| 2758 | evhttp_send_done(struct evhttp_connection *evcon, void *arg) |
| 2759 | { |
| 2760 | int need_close; |
| 2761 | struct evhttp_request *req = TAILQ_FIRST(&evcon->requests); |
| 2762 | TAILQ_REMOVE(&evcon->requests, req, next); |
| 2763 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2764 | if (req->on_complete_cb != NULL) { |
| 2765 | req->on_complete_cb(req, req->on_complete_cb_arg); |
| 2766 | } |
| 2767 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2768 | need_close = |
| 2769 | (REQ_VERSION_BEFORE(req, 1, 1) && |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2770 | !evhttp_is_connection_keepalive(req->input_headers)) || |
| 2771 | evhttp_is_request_connection_close(req); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2772 | |
| 2773 | EVUTIL_ASSERT(req->flags & EVHTTP_REQ_OWN_CONNECTION); |
| 2774 | evhttp_request_free(req); |
| 2775 | |
| 2776 | if (need_close) { |
| 2777 | evhttp_connection_free(evcon); |
| 2778 | return; |
| 2779 | } |
| 2780 | |
| 2781 | /* we have a persistent connection; try to accept another request. */ |
| 2782 | if (evhttp_associate_new_request_with_connection(evcon) == -1) { |
| 2783 | evhttp_connection_free(evcon); |
| 2784 | } |
| 2785 | } |
| 2786 | |
| 2787 | /* |
| 2788 | * Returns an error page. |
| 2789 | */ |
| 2790 | |
| 2791 | void |
| 2792 | evhttp_send_error(struct evhttp_request *req, int error, const char *reason) |
| 2793 | { |
| 2794 | |
| 2795 | #define ERR_FORMAT "<HTML><HEAD>\n" \ |
| 2796 | "<TITLE>%d %s</TITLE>\n" \ |
| 2797 | "</HEAD><BODY>\n" \ |
| 2798 | "<H1>%s</H1>\n" \ |
| 2799 | "</BODY></HTML>\n" |
| 2800 | |
| 2801 | struct evbuffer *buf = evbuffer_new(); |
| 2802 | if (buf == NULL) { |
| 2803 | /* if we cannot allocate memory; we just drop the connection */ |
| 2804 | evhttp_connection_free(req->evcon); |
| 2805 | return; |
| 2806 | } |
| 2807 | if (reason == NULL) { |
| 2808 | reason = evhttp_response_phrase_internal(error); |
| 2809 | } |
| 2810 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2811 | evhttp_response_code_(req, error, reason); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2812 | |
| 2813 | evbuffer_add_printf(buf, ERR_FORMAT, error, reason, reason); |
| 2814 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2815 | evhttp_send_page_(req, buf); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2816 | |
| 2817 | evbuffer_free(buf); |
| 2818 | #undef ERR_FORMAT |
| 2819 | } |
| 2820 | |
| 2821 | /* Requires that headers and response code are already set up */ |
| 2822 | |
| 2823 | static inline void |
| 2824 | evhttp_send(struct evhttp_request *req, struct evbuffer *databuf) |
| 2825 | { |
| 2826 | struct evhttp_connection *evcon = req->evcon; |
| 2827 | |
| 2828 | if (evcon == NULL) { |
| 2829 | evhttp_request_free(req); |
| 2830 | return; |
| 2831 | } |
| 2832 | |
| 2833 | EVUTIL_ASSERT(TAILQ_FIRST(&evcon->requests) == req); |
| 2834 | |
| 2835 | /* we expect no more calls form the user on this request */ |
| 2836 | req->userdone = 1; |
| 2837 | |
| 2838 | /* xxx: not sure if we really should expose the data buffer this way */ |
| 2839 | if (databuf != NULL) |
| 2840 | evbuffer_add_buffer(req->output_buffer, databuf); |
| 2841 | |
| 2842 | /* Adds headers to the response */ |
| 2843 | evhttp_make_header(evcon, req); |
| 2844 | |
| 2845 | evhttp_write_buffer(evcon, evhttp_send_done, NULL); |
| 2846 | } |
| 2847 | |
| 2848 | void |
| 2849 | evhttp_send_reply(struct evhttp_request *req, int code, const char *reason, |
| 2850 | struct evbuffer *databuf) |
| 2851 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2852 | evhttp_response_code_(req, code, reason); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2853 | |
| 2854 | evhttp_send(req, databuf); |
| 2855 | } |
| 2856 | |
| 2857 | void |
| 2858 | evhttp_send_reply_start(struct evhttp_request *req, int code, |
| 2859 | const char *reason) |
| 2860 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2861 | evhttp_response_code_(req, code, reason); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 2862 | |
| 2863 | if (req->evcon == NULL) |
| 2864 | return; |
| 2865 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2866 | if (evhttp_find_header(req->output_headers, "Content-Length") == NULL && |
| 2867 | REQ_VERSION_ATLEAST(req, 1, 1) && |
| 2868 | evhttp_response_needs_body(req)) { |
| 2869 | /* |
| 2870 | * prefer HTTP/1.1 chunked encoding to closing the connection; |
| 2871 | * note RFC 2616 section 4.4 forbids it with Content-Length: |
| 2872 | * and it's not necessary then anyway. |
| 2873 | */ |
| 2874 | evhttp_add_header(req->output_headers, "Transfer-Encoding", |
| 2875 | "chunked"); |
| 2876 | req->chunked = 1; |
| 2877 | } else { |
| 2878 | req->chunked = 0; |
| 2879 | } |
| 2880 | evhttp_make_header(req->evcon, req); |
| 2881 | evhttp_write_buffer(req->evcon, NULL, NULL); |
| 2882 | } |
| 2883 | |
| 2884 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2885 | evhttp_send_reply_chunk_with_cb(struct evhttp_request *req, struct evbuffer *databuf, |
| 2886 | void (*cb)(struct evhttp_connection *, void *), void *arg) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2887 | { |
| 2888 | struct evhttp_connection *evcon = req->evcon; |
| 2889 | struct evbuffer *output; |
| 2890 | |
| 2891 | if (evcon == NULL) |
| 2892 | return; |
| 2893 | |
| 2894 | output = bufferevent_get_output(evcon->bufev); |
| 2895 | |
| 2896 | if (evbuffer_get_length(databuf) == 0) |
| 2897 | return; |
| 2898 | if (!evhttp_response_needs_body(req)) |
| 2899 | return; |
| 2900 | if (req->chunked) { |
| 2901 | evbuffer_add_printf(output, "%x\r\n", |
| 2902 | (unsigned)evbuffer_get_length(databuf)); |
| 2903 | } |
| 2904 | evbuffer_add_buffer(output, databuf); |
| 2905 | if (req->chunked) { |
| 2906 | evbuffer_add(output, "\r\n", 2); |
| 2907 | } |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2908 | evhttp_write_buffer(evcon, cb, arg); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2909 | } |
| 2910 | |
| 2911 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 2912 | evhttp_send_reply_chunk(struct evhttp_request *req, struct evbuffer *databuf) |
| 2913 | { |
| 2914 | evhttp_send_reply_chunk_with_cb(req, databuf, NULL, NULL); |
| 2915 | } |
| 2916 | void |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 2917 | evhttp_send_reply_end(struct evhttp_request *req) |
| 2918 | { |
| 2919 | struct evhttp_connection *evcon = req->evcon; |
| 2920 | struct evbuffer *output; |
| 2921 | |
| 2922 | if (evcon == NULL) { |
| 2923 | evhttp_request_free(req); |
| 2924 | return; |
| 2925 | } |
| 2926 | |
| 2927 | output = bufferevent_get_output(evcon->bufev); |
| 2928 | |
| 2929 | /* we expect no more calls form the user on this request */ |
| 2930 | req->userdone = 1; |
| 2931 | |
| 2932 | if (req->chunked) { |
| 2933 | evbuffer_add(output, "0\r\n\r\n", 5); |
| 2934 | evhttp_write_buffer(req->evcon, evhttp_send_done, NULL); |
| 2935 | req->chunked = 0; |
| 2936 | } else if (evbuffer_get_length(output) == 0) { |
| 2937 | /* let the connection know that we are done with the request */ |
| 2938 | evhttp_send_done(evcon, NULL); |
| 2939 | } else { |
| 2940 | /* make the callback execute after all data has been written */ |
| 2941 | evcon->cb = evhttp_send_done; |
| 2942 | evcon->cb_arg = NULL; |
| 2943 | } |
| 2944 | } |
| 2945 | |
| 2946 | static const char *informational_phrases[] = { |
| 2947 | /* 100 */ "Continue", |
| 2948 | /* 101 */ "Switching Protocols" |
| 2949 | }; |
| 2950 | |
| 2951 | static const char *success_phrases[] = { |
| 2952 | /* 200 */ "OK", |
| 2953 | /* 201 */ "Created", |
| 2954 | /* 202 */ "Accepted", |
| 2955 | /* 203 */ "Non-Authoritative Information", |
| 2956 | /* 204 */ "No Content", |
| 2957 | /* 205 */ "Reset Content", |
| 2958 | /* 206 */ "Partial Content" |
| 2959 | }; |
| 2960 | |
| 2961 | static const char *redirection_phrases[] = { |
| 2962 | /* 300 */ "Multiple Choices", |
| 2963 | /* 301 */ "Moved Permanently", |
| 2964 | /* 302 */ "Found", |
| 2965 | /* 303 */ "See Other", |
| 2966 | /* 304 */ "Not Modified", |
| 2967 | /* 305 */ "Use Proxy", |
| 2968 | /* 307 */ "Temporary Redirect" |
| 2969 | }; |
| 2970 | |
| 2971 | static const char *client_error_phrases[] = { |
| 2972 | /* 400 */ "Bad Request", |
| 2973 | /* 401 */ "Unauthorized", |
| 2974 | /* 402 */ "Payment Required", |
| 2975 | /* 403 */ "Forbidden", |
| 2976 | /* 404 */ "Not Found", |
| 2977 | /* 405 */ "Method Not Allowed", |
| 2978 | /* 406 */ "Not Acceptable", |
| 2979 | /* 407 */ "Proxy Authentication Required", |
| 2980 | /* 408 */ "Request Time-out", |
| 2981 | /* 409 */ "Conflict", |
| 2982 | /* 410 */ "Gone", |
| 2983 | /* 411 */ "Length Required", |
| 2984 | /* 412 */ "Precondition Failed", |
| 2985 | /* 413 */ "Request Entity Too Large", |
| 2986 | /* 414 */ "Request-URI Too Large", |
| 2987 | /* 415 */ "Unsupported Media Type", |
| 2988 | /* 416 */ "Requested range not satisfiable", |
| 2989 | /* 417 */ "Expectation Failed" |
| 2990 | }; |
| 2991 | |
| 2992 | static const char *server_error_phrases[] = { |
| 2993 | /* 500 */ "Internal Server Error", |
| 2994 | /* 501 */ "Not Implemented", |
| 2995 | /* 502 */ "Bad Gateway", |
| 2996 | /* 503 */ "Service Unavailable", |
| 2997 | /* 504 */ "Gateway Time-out", |
| 2998 | /* 505 */ "HTTP Version not supported" |
| 2999 | }; |
| 3000 | |
| 3001 | struct response_class { |
| 3002 | const char *name; |
| 3003 | size_t num_responses; |
| 3004 | const char **responses; |
| 3005 | }; |
| 3006 | |
| 3007 | #ifndef MEMBERSOF |
| 3008 | #define MEMBERSOF(x) (sizeof(x)/sizeof(x[0])) |
| 3009 | #endif |
| 3010 | |
| 3011 | static const struct response_class response_classes[] = { |
| 3012 | /* 1xx */ { "Informational", MEMBERSOF(informational_phrases), informational_phrases }, |
| 3013 | /* 2xx */ { "Success", MEMBERSOF(success_phrases), success_phrases }, |
| 3014 | /* 3xx */ { "Redirection", MEMBERSOF(redirection_phrases), redirection_phrases }, |
| 3015 | /* 4xx */ { "Client Error", MEMBERSOF(client_error_phrases), client_error_phrases }, |
| 3016 | /* 5xx */ { "Server Error", MEMBERSOF(server_error_phrases), server_error_phrases } |
| 3017 | }; |
| 3018 | |
| 3019 | static const char * |
| 3020 | evhttp_response_phrase_internal(int code) |
| 3021 | { |
| 3022 | int klass = code / 100 - 1; |
| 3023 | int subcode = code % 100; |
| 3024 | |
| 3025 | /* Unknown class - can't do any better here */ |
| 3026 | if (klass < 0 || klass >= (int) MEMBERSOF(response_classes)) |
| 3027 | return "Unknown Status Class"; |
| 3028 | |
| 3029 | /* Unknown sub-code, return class name at least */ |
| 3030 | if (subcode >= (int) response_classes[klass].num_responses) |
| 3031 | return response_classes[klass].name; |
| 3032 | |
| 3033 | return response_classes[klass].responses[subcode]; |
| 3034 | } |
| 3035 | |
| 3036 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3037 | evhttp_response_code_(struct evhttp_request *req, int code, const char *reason) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3038 | { |
| 3039 | req->kind = EVHTTP_RESPONSE; |
| 3040 | req->response_code = code; |
| 3041 | if (req->response_code_line != NULL) |
| 3042 | mm_free(req->response_code_line); |
| 3043 | if (reason == NULL) |
| 3044 | reason = evhttp_response_phrase_internal(code); |
| 3045 | req->response_code_line = mm_strdup(reason); |
| 3046 | if (req->response_code_line == NULL) { |
| 3047 | event_warn("%s: strdup", __func__); |
| 3048 | /* XXX what else can we do? */ |
| 3049 | } |
| 3050 | } |
| 3051 | |
| 3052 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3053 | evhttp_send_page_(struct evhttp_request *req, struct evbuffer *databuf) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3054 | { |
| 3055 | if (!req->major || !req->minor) { |
| 3056 | req->major = 1; |
| 3057 | req->minor = 1; |
| 3058 | } |
| 3059 | |
| 3060 | if (req->kind != EVHTTP_RESPONSE) |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3061 | evhttp_response_code_(req, 200, "OK"); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3062 | |
| 3063 | evhttp_clear_headers(req->output_headers); |
| 3064 | evhttp_add_header(req->output_headers, "Content-Type", "text/html"); |
| 3065 | evhttp_add_header(req->output_headers, "Connection", "close"); |
| 3066 | |
| 3067 | evhttp_send(req, databuf); |
| 3068 | } |
| 3069 | |
| 3070 | static const char uri_chars[256] = { |
| 3071 | /* 0 */ |
| 3072 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3073 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3074 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, |
| 3075 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, |
| 3076 | /* 64 */ |
| 3077 | 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 3078 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, |
| 3079 | 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 3080 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, |
| 3081 | /* 128 */ |
| 3082 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3083 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3084 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3085 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3086 | /* 192 */ |
| 3087 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3088 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3089 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3090 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 3091 | }; |
| 3092 | |
| 3093 | #define CHAR_IS_UNRESERVED(c) \ |
| 3094 | (uri_chars[(unsigned char)(c)]) |
| 3095 | |
| 3096 | /* |
| 3097 | * Helper functions to encode/decode a string for inclusion in a URI. |
| 3098 | * The returned string must be freed by the caller. |
| 3099 | */ |
| 3100 | char * |
| 3101 | evhttp_uriencode(const char *uri, ev_ssize_t len, int space_as_plus) |
| 3102 | { |
| 3103 | struct evbuffer *buf = evbuffer_new(); |
| 3104 | const char *p, *end; |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3105 | char *result = NULL; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3106 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3107 | if (!buf) { |
| 3108 | goto out; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3109 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3110 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3111 | if (len >= 0) { |
| 3112 | if (uri + len < uri) { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3113 | goto out; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3114 | } |
| 3115 | |
| 3116 | end = uri + len; |
| 3117 | } else { |
| 3118 | size_t slen = strlen(uri); |
| 3119 | |
| 3120 | if (slen >= EV_SSIZE_MAX) { |
| 3121 | /* we don't want to mix signed and unsigned */ |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3122 | goto out; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3123 | } |
| 3124 | |
| 3125 | if (uri + slen < uri) { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3126 | goto out; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3127 | } |
| 3128 | |
| 3129 | end = uri + slen; |
| 3130 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3131 | |
| 3132 | for (p = uri; p < end; p++) { |
| 3133 | if (CHAR_IS_UNRESERVED(*p)) { |
| 3134 | evbuffer_add(buf, p, 1); |
| 3135 | } else if (*p == ' ' && space_as_plus) { |
| 3136 | evbuffer_add(buf, "+", 1); |
| 3137 | } else { |
| 3138 | evbuffer_add_printf(buf, "%%%02X", (unsigned char)(*p)); |
| 3139 | } |
| 3140 | } |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3141 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3142 | evbuffer_add(buf, "", 1); /* NUL-terminator. */ |
| 3143 | result = mm_malloc(evbuffer_get_length(buf)); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3144 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3145 | if (result) |
| 3146 | evbuffer_remove(buf, result, evbuffer_get_length(buf)); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3147 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3148 | out: |
| 3149 | if (buf) |
| 3150 | evbuffer_free(buf); |
| 3151 | return result; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3152 | } |
| 3153 | |
| 3154 | char * |
| 3155 | evhttp_encode_uri(const char *str) |
| 3156 | { |
| 3157 | return evhttp_uriencode(str, -1, 0); |
| 3158 | } |
| 3159 | |
| 3160 | /* |
| 3161 | * @param decode_plus_ctl: if 1, we decode plus into space. If 0, we don't. |
| 3162 | * If -1, when true we transform plus to space only after we've seen |
| 3163 | * a ?. -1 is deprecated. |
| 3164 | * @return the number of bytes written to 'ret'. |
| 3165 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3166 | int |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3167 | evhttp_decode_uri_internal( |
| 3168 | const char *uri, size_t length, char *ret, int decode_plus_ctl) |
| 3169 | { |
| 3170 | char c; |
| 3171 | int j; |
| 3172 | int decode_plus = (decode_plus_ctl == 1) ? 1: 0; |
| 3173 | unsigned i; |
| 3174 | |
| 3175 | for (i = j = 0; i < length; i++) { |
| 3176 | c = uri[i]; |
| 3177 | if (c == '?') { |
| 3178 | if (decode_plus_ctl < 0) |
| 3179 | decode_plus = 1; |
| 3180 | } else if (c == '+' && decode_plus) { |
| 3181 | c = ' '; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3182 | } else if ((i + 2) < length && c == '%' && |
| 3183 | EVUTIL_ISXDIGIT_(uri[i+1]) && EVUTIL_ISXDIGIT_(uri[i+2])) { |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3184 | char tmp[3]; |
| 3185 | tmp[0] = uri[i+1]; |
| 3186 | tmp[1] = uri[i+2]; |
| 3187 | tmp[2] = '\0'; |
| 3188 | c = (char)strtol(tmp, NULL, 16); |
| 3189 | i += 2; |
| 3190 | } |
| 3191 | ret[j++] = c; |
| 3192 | } |
| 3193 | ret[j] = '\0'; |
| 3194 | |
| 3195 | return (j); |
| 3196 | } |
| 3197 | |
| 3198 | /* deprecated */ |
| 3199 | char * |
| 3200 | evhttp_decode_uri(const char *uri) |
| 3201 | { |
| 3202 | char *ret; |
| 3203 | |
| 3204 | if ((ret = mm_malloc(strlen(uri) + 1)) == NULL) { |
| 3205 | event_warn("%s: malloc(%lu)", __func__, |
| 3206 | (unsigned long)(strlen(uri) + 1)); |
| 3207 | return (NULL); |
| 3208 | } |
| 3209 | |
| 3210 | evhttp_decode_uri_internal(uri, strlen(uri), |
| 3211 | ret, -1 /*always_decode_plus*/); |
| 3212 | |
| 3213 | return (ret); |
| 3214 | } |
| 3215 | |
| 3216 | char * |
| 3217 | evhttp_uridecode(const char *uri, int decode_plus, size_t *size_out) |
| 3218 | { |
| 3219 | char *ret; |
| 3220 | int n; |
| 3221 | |
| 3222 | if ((ret = mm_malloc(strlen(uri) + 1)) == NULL) { |
| 3223 | event_warn("%s: malloc(%lu)", __func__, |
| 3224 | (unsigned long)(strlen(uri) + 1)); |
| 3225 | return (NULL); |
| 3226 | } |
| 3227 | |
| 3228 | n = evhttp_decode_uri_internal(uri, strlen(uri), |
| 3229 | ret, !!decode_plus/*always_decode_plus*/); |
| 3230 | |
| 3231 | if (size_out) { |
| 3232 | EVUTIL_ASSERT(n >= 0); |
| 3233 | *size_out = (size_t)n; |
| 3234 | } |
| 3235 | |
| 3236 | return (ret); |
| 3237 | } |
| 3238 | |
| 3239 | /* |
| 3240 | * Helper function to parse out arguments in a query. |
| 3241 | * The arguments are separated by key and value. |
| 3242 | */ |
| 3243 | |
| 3244 | static int |
| 3245 | evhttp_parse_query_impl(const char *str, struct evkeyvalq *headers, |
| 3246 | int is_whole_uri) |
| 3247 | { |
| 3248 | char *line=NULL; |
| 3249 | char *argument; |
| 3250 | char *p; |
| 3251 | const char *query_part; |
| 3252 | int result = -1; |
| 3253 | struct evhttp_uri *uri=NULL; |
| 3254 | |
| 3255 | TAILQ_INIT(headers); |
| 3256 | |
| 3257 | if (is_whole_uri) { |
| 3258 | uri = evhttp_uri_parse(str); |
| 3259 | if (!uri) |
| 3260 | goto error; |
| 3261 | query_part = evhttp_uri_get_query(uri); |
| 3262 | } else { |
| 3263 | query_part = str; |
| 3264 | } |
| 3265 | |
| 3266 | /* No arguments - we are done */ |
| 3267 | if (!query_part || !strlen(query_part)) { |
| 3268 | result = 0; |
| 3269 | goto done; |
| 3270 | } |
| 3271 | |
| 3272 | if ((line = mm_strdup(query_part)) == NULL) { |
| 3273 | event_warn("%s: strdup", __func__); |
| 3274 | goto error; |
| 3275 | } |
| 3276 | |
| 3277 | p = argument = line; |
| 3278 | while (p != NULL && *p != '\0') { |
| 3279 | char *key, *value, *decoded_value; |
| 3280 | argument = strsep(&p, "&"); |
| 3281 | |
| 3282 | value = argument; |
| 3283 | key = strsep(&value, "="); |
| 3284 | if (value == NULL || *key == '\0') { |
| 3285 | goto error; |
| 3286 | } |
| 3287 | |
| 3288 | if ((decoded_value = mm_malloc(strlen(value) + 1)) == NULL) { |
| 3289 | event_warn("%s: mm_malloc", __func__); |
| 3290 | goto error; |
| 3291 | } |
| 3292 | evhttp_decode_uri_internal(value, strlen(value), |
| 3293 | decoded_value, 1 /*always_decode_plus*/); |
| 3294 | event_debug(("Query Param: %s -> %s\n", key, decoded_value)); |
| 3295 | evhttp_add_header_internal(headers, key, decoded_value); |
| 3296 | mm_free(decoded_value); |
| 3297 | } |
| 3298 | |
| 3299 | result = 0; |
| 3300 | goto done; |
| 3301 | error: |
| 3302 | evhttp_clear_headers(headers); |
| 3303 | done: |
| 3304 | if (line) |
| 3305 | mm_free(line); |
| 3306 | if (uri) |
| 3307 | evhttp_uri_free(uri); |
| 3308 | return result; |
| 3309 | } |
| 3310 | |
| 3311 | int |
| 3312 | evhttp_parse_query(const char *uri, struct evkeyvalq *headers) |
| 3313 | { |
| 3314 | return evhttp_parse_query_impl(uri, headers, 1); |
| 3315 | } |
| 3316 | int |
| 3317 | evhttp_parse_query_str(const char *uri, struct evkeyvalq *headers) |
| 3318 | { |
| 3319 | return evhttp_parse_query_impl(uri, headers, 0); |
| 3320 | } |
| 3321 | |
| 3322 | static struct evhttp_cb * |
| 3323 | evhttp_dispatch_callback(struct httpcbq *callbacks, struct evhttp_request *req) |
| 3324 | { |
| 3325 | struct evhttp_cb *cb; |
| 3326 | size_t offset = 0; |
| 3327 | char *translated; |
| 3328 | const char *path; |
| 3329 | |
| 3330 | /* Test for different URLs */ |
| 3331 | path = evhttp_uri_get_path(req->uri_elems); |
| 3332 | offset = strlen(path); |
| 3333 | if ((translated = mm_malloc(offset + 1)) == NULL) |
| 3334 | return (NULL); |
| 3335 | evhttp_decode_uri_internal(path, offset, translated, |
| 3336 | 0 /* decode_plus */); |
| 3337 | |
| 3338 | TAILQ_FOREACH(cb, callbacks, next) { |
| 3339 | if (!strcmp(cb->what, translated)) { |
| 3340 | mm_free(translated); |
| 3341 | return (cb); |
| 3342 | } |
| 3343 | } |
| 3344 | |
| 3345 | mm_free(translated); |
| 3346 | return (NULL); |
| 3347 | } |
| 3348 | |
| 3349 | |
| 3350 | static int |
| 3351 | prefix_suffix_match(const char *pattern, const char *name, int ignorecase) |
| 3352 | { |
| 3353 | char c; |
| 3354 | |
| 3355 | while (1) { |
| 3356 | switch (c = *pattern++) { |
| 3357 | case '\0': |
| 3358 | return *name == '\0'; |
| 3359 | |
| 3360 | case '*': |
| 3361 | while (*name != '\0') { |
| 3362 | if (prefix_suffix_match(pattern, name, |
| 3363 | ignorecase)) |
| 3364 | return (1); |
| 3365 | ++name; |
| 3366 | } |
| 3367 | return (0); |
| 3368 | default: |
| 3369 | if (c != *name) { |
| 3370 | if (!ignorecase || |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3371 | EVUTIL_TOLOWER_(c) != EVUTIL_TOLOWER_(*name)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3372 | return (0); |
| 3373 | } |
| 3374 | ++name; |
| 3375 | } |
| 3376 | } |
| 3377 | /* NOTREACHED */ |
| 3378 | } |
| 3379 | |
| 3380 | /* |
| 3381 | Search the vhost hierarchy beginning with http for a server alias |
| 3382 | matching hostname. If a match is found, and outhttp is non-null, |
| 3383 | outhttp is set to the matching http object and 1 is returned. |
| 3384 | */ |
| 3385 | |
| 3386 | static int |
| 3387 | evhttp_find_alias(struct evhttp *http, struct evhttp **outhttp, |
| 3388 | const char *hostname) |
| 3389 | { |
| 3390 | struct evhttp_server_alias *alias; |
| 3391 | struct evhttp *vhost; |
| 3392 | |
| 3393 | TAILQ_FOREACH(alias, &http->aliases, next) { |
| 3394 | /* XXX Do we need to handle IP addresses? */ |
| 3395 | if (!evutil_ascii_strcasecmp(alias->alias, hostname)) { |
| 3396 | if (outhttp) |
| 3397 | *outhttp = http; |
| 3398 | return 1; |
| 3399 | } |
| 3400 | } |
| 3401 | |
| 3402 | /* XXX It might be good to avoid recursion here, but I don't |
| 3403 | see a way to do that w/o a list. */ |
| 3404 | TAILQ_FOREACH(vhost, &http->virtualhosts, next_vhost) { |
| 3405 | if (evhttp_find_alias(vhost, outhttp, hostname)) |
| 3406 | return 1; |
| 3407 | } |
| 3408 | |
| 3409 | return 0; |
| 3410 | } |
| 3411 | |
| 3412 | /* |
| 3413 | Attempts to find the best http object to handle a request for a hostname. |
| 3414 | All aliases for the root http object and vhosts are searched for an exact |
| 3415 | match. Then, the vhost hierarchy is traversed again for a matching |
| 3416 | pattern. |
| 3417 | |
| 3418 | If an alias or vhost is matched, 1 is returned, and outhttp, if non-null, |
| 3419 | is set with the best matching http object. If there are no matches, the |
| 3420 | root http object is stored in outhttp and 0 is returned. |
| 3421 | */ |
| 3422 | |
| 3423 | static int |
| 3424 | evhttp_find_vhost(struct evhttp *http, struct evhttp **outhttp, |
| 3425 | const char *hostname) |
| 3426 | { |
| 3427 | struct evhttp *vhost; |
| 3428 | struct evhttp *oldhttp; |
| 3429 | int match_found = 0; |
| 3430 | |
| 3431 | if (evhttp_find_alias(http, outhttp, hostname)) |
| 3432 | return 1; |
| 3433 | |
| 3434 | do { |
| 3435 | oldhttp = http; |
| 3436 | TAILQ_FOREACH(vhost, &http->virtualhosts, next_vhost) { |
| 3437 | if (prefix_suffix_match(vhost->vhost_pattern, |
| 3438 | hostname, 1 /* ignorecase */)) { |
| 3439 | http = vhost; |
| 3440 | match_found = 1; |
| 3441 | break; |
| 3442 | } |
| 3443 | } |
| 3444 | } while (oldhttp != http); |
| 3445 | |
| 3446 | if (outhttp) |
| 3447 | *outhttp = http; |
| 3448 | |
| 3449 | return match_found; |
| 3450 | } |
| 3451 | |
| 3452 | static void |
| 3453 | evhttp_handle_request(struct evhttp_request *req, void *arg) |
| 3454 | { |
| 3455 | struct evhttp *http = arg; |
| 3456 | struct evhttp_cb *cb = NULL; |
| 3457 | const char *hostname; |
| 3458 | |
| 3459 | /* we have a new request on which the user needs to take action */ |
| 3460 | req->userdone = 0; |
| 3461 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3462 | bufferevent_disable(req->evcon->bufev, EV_READ); |
| 3463 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3464 | if (req->type == 0 || req->uri == NULL) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3465 | evhttp_send_error(req, req->response_code, NULL); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3466 | return; |
| 3467 | } |
| 3468 | |
| 3469 | if ((http->allowed_methods & req->type) == 0) { |
| 3470 | event_debug(("Rejecting disallowed method %x (allowed: %x)\n", |
| 3471 | (unsigned)req->type, (unsigned)http->allowed_methods)); |
| 3472 | evhttp_send_error(req, HTTP_NOTIMPLEMENTED, NULL); |
| 3473 | return; |
| 3474 | } |
| 3475 | |
| 3476 | /* handle potential virtual hosts */ |
| 3477 | hostname = evhttp_request_get_host(req); |
| 3478 | if (hostname != NULL) { |
| 3479 | evhttp_find_vhost(http, &http, hostname); |
| 3480 | } |
| 3481 | |
| 3482 | if ((cb = evhttp_dispatch_callback(&http->callbacks, req)) != NULL) { |
| 3483 | (*cb->cb)(req, cb->cbarg); |
| 3484 | return; |
| 3485 | } |
| 3486 | |
| 3487 | /* Generic call back */ |
| 3488 | if (http->gencb) { |
| 3489 | (*http->gencb)(req, http->gencbarg); |
| 3490 | return; |
| 3491 | } else { |
| 3492 | /* We need to send a 404 here */ |
| 3493 | #define ERR_FORMAT "<html><head>" \ |
| 3494 | "<title>404 Not Found</title>" \ |
| 3495 | "</head><body>" \ |
| 3496 | "<h1>Not Found</h1>" \ |
| 3497 | "<p>The requested URL %s was not found on this server.</p>"\ |
| 3498 | "</body></html>\n" |
| 3499 | |
| 3500 | char *escaped_html; |
| 3501 | struct evbuffer *buf; |
| 3502 | |
| 3503 | if ((escaped_html = evhttp_htmlescape(req->uri)) == NULL) { |
| 3504 | evhttp_connection_free(req->evcon); |
| 3505 | return; |
| 3506 | } |
| 3507 | |
| 3508 | if ((buf = evbuffer_new()) == NULL) { |
| 3509 | mm_free(escaped_html); |
| 3510 | evhttp_connection_free(req->evcon); |
| 3511 | return; |
| 3512 | } |
| 3513 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3514 | evhttp_response_code_(req, HTTP_NOTFOUND, "Not Found"); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3515 | |
| 3516 | evbuffer_add_printf(buf, ERR_FORMAT, escaped_html); |
| 3517 | |
| 3518 | mm_free(escaped_html); |
| 3519 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3520 | evhttp_send_page_(req, buf); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3521 | |
| 3522 | evbuffer_free(buf); |
| 3523 | #undef ERR_FORMAT |
| 3524 | } |
| 3525 | } |
| 3526 | |
| 3527 | /* Listener callback when a connection arrives at a server. */ |
| 3528 | static void |
| 3529 | accept_socket_cb(struct evconnlistener *listener, evutil_socket_t nfd, struct sockaddr *peer_sa, int peer_socklen, void *arg) |
| 3530 | { |
| 3531 | struct evhttp *http = arg; |
| 3532 | |
| 3533 | evhttp_get_request(http, nfd, peer_sa, peer_socklen); |
| 3534 | } |
| 3535 | |
| 3536 | int |
| 3537 | evhttp_bind_socket(struct evhttp *http, const char *address, ev_uint16_t port) |
| 3538 | { |
| 3539 | struct evhttp_bound_socket *bound = |
| 3540 | evhttp_bind_socket_with_handle(http, address, port); |
| 3541 | if (bound == NULL) |
| 3542 | return (-1); |
| 3543 | return (0); |
| 3544 | } |
| 3545 | |
| 3546 | struct evhttp_bound_socket * |
| 3547 | evhttp_bind_socket_with_handle(struct evhttp *http, const char *address, ev_uint16_t port) |
| 3548 | { |
| 3549 | evutil_socket_t fd; |
| 3550 | struct evhttp_bound_socket *bound; |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3551 | int serrno; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3552 | |
| 3553 | if ((fd = bind_socket(address, port, 1 /*reuse*/)) == -1) |
| 3554 | return (NULL); |
| 3555 | |
| 3556 | if (listen(fd, 128) == -1) { |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3557 | serrno = EVUTIL_SOCKET_ERROR(); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3558 | event_sock_warn(fd, "%s: listen", __func__); |
| 3559 | evutil_closesocket(fd); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 3560 | EVUTIL_SET_SOCKET_ERROR(serrno); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3561 | return (NULL); |
| 3562 | } |
| 3563 | |
| 3564 | bound = evhttp_accept_socket_with_handle(http, fd); |
| 3565 | |
| 3566 | if (bound != NULL) { |
| 3567 | event_debug(("Bound to port %d - Awaiting connections ... ", |
| 3568 | port)); |
| 3569 | return (bound); |
| 3570 | } |
| 3571 | |
| 3572 | return (NULL); |
| 3573 | } |
| 3574 | |
| 3575 | int |
| 3576 | evhttp_accept_socket(struct evhttp *http, evutil_socket_t fd) |
| 3577 | { |
| 3578 | struct evhttp_bound_socket *bound = |
| 3579 | evhttp_accept_socket_with_handle(http, fd); |
| 3580 | if (bound == NULL) |
| 3581 | return (-1); |
| 3582 | return (0); |
| 3583 | } |
| 3584 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3585 | void |
| 3586 | evhttp_foreach_bound_socket(struct evhttp *http, |
| 3587 | evhttp_bound_socket_foreach_fn *function, |
| 3588 | void *argument) |
| 3589 | { |
| 3590 | struct evhttp_bound_socket *bound; |
| 3591 | |
| 3592 | TAILQ_FOREACH(bound, &http->sockets, next) |
| 3593 | function(bound, argument); |
| 3594 | } |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3595 | |
| 3596 | struct evhttp_bound_socket * |
| 3597 | evhttp_accept_socket_with_handle(struct evhttp *http, evutil_socket_t fd) |
| 3598 | { |
| 3599 | struct evhttp_bound_socket *bound; |
| 3600 | struct evconnlistener *listener; |
| 3601 | const int flags = |
| 3602 | LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_EXEC|LEV_OPT_CLOSE_ON_FREE; |
| 3603 | |
| 3604 | listener = evconnlistener_new(http->base, NULL, NULL, |
| 3605 | flags, |
| 3606 | 0, /* Backlog is '0' because we already said 'listen' */ |
| 3607 | fd); |
| 3608 | if (!listener) |
| 3609 | return (NULL); |
| 3610 | |
| 3611 | bound = evhttp_bind_listener(http, listener); |
| 3612 | if (!bound) { |
| 3613 | evconnlistener_free(listener); |
| 3614 | return (NULL); |
| 3615 | } |
| 3616 | return (bound); |
| 3617 | } |
| 3618 | |
| 3619 | struct evhttp_bound_socket * |
| 3620 | evhttp_bind_listener(struct evhttp *http, struct evconnlistener *listener) |
| 3621 | { |
| 3622 | struct evhttp_bound_socket *bound; |
| 3623 | |
| 3624 | bound = mm_malloc(sizeof(struct evhttp_bound_socket)); |
| 3625 | if (bound == NULL) |
| 3626 | return (NULL); |
| 3627 | |
| 3628 | bound->listener = listener; |
| 3629 | TAILQ_INSERT_TAIL(&http->sockets, bound, next); |
| 3630 | |
| 3631 | evconnlistener_set_cb(listener, accept_socket_cb, http); |
| 3632 | return bound; |
| 3633 | } |
| 3634 | |
| 3635 | evutil_socket_t |
| 3636 | evhttp_bound_socket_get_fd(struct evhttp_bound_socket *bound) |
| 3637 | { |
| 3638 | return evconnlistener_get_fd(bound->listener); |
| 3639 | } |
| 3640 | |
| 3641 | struct evconnlistener * |
| 3642 | evhttp_bound_socket_get_listener(struct evhttp_bound_socket *bound) |
| 3643 | { |
| 3644 | return bound->listener; |
| 3645 | } |
| 3646 | |
| 3647 | void |
| 3648 | evhttp_del_accept_socket(struct evhttp *http, struct evhttp_bound_socket *bound) |
| 3649 | { |
| 3650 | TAILQ_REMOVE(&http->sockets, bound, next); |
| 3651 | evconnlistener_free(bound->listener); |
| 3652 | mm_free(bound); |
| 3653 | } |
| 3654 | |
| 3655 | static struct evhttp* |
| 3656 | evhttp_new_object(void) |
| 3657 | { |
| 3658 | struct evhttp *http = NULL; |
| 3659 | |
| 3660 | if ((http = mm_calloc(1, sizeof(struct evhttp))) == NULL) { |
| 3661 | event_warn("%s: calloc", __func__); |
| 3662 | return (NULL); |
| 3663 | } |
| 3664 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3665 | evutil_timerclear(&http->timeout); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3666 | evhttp_set_max_headers_size(http, EV_SIZE_MAX); |
| 3667 | evhttp_set_max_body_size(http, EV_SIZE_MAX); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3668 | evhttp_set_default_content_type(http, "text/html; charset=ISO-8859-1"); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3669 | evhttp_set_allowed_methods(http, |
| 3670 | EVHTTP_REQ_GET | |
| 3671 | EVHTTP_REQ_POST | |
| 3672 | EVHTTP_REQ_HEAD | |
| 3673 | EVHTTP_REQ_PUT | |
| 3674 | EVHTTP_REQ_DELETE); |
| 3675 | |
| 3676 | TAILQ_INIT(&http->sockets); |
| 3677 | TAILQ_INIT(&http->callbacks); |
| 3678 | TAILQ_INIT(&http->connections); |
| 3679 | TAILQ_INIT(&http->virtualhosts); |
| 3680 | TAILQ_INIT(&http->aliases); |
| 3681 | |
| 3682 | return (http); |
| 3683 | } |
| 3684 | |
| 3685 | struct evhttp * |
| 3686 | evhttp_new(struct event_base *base) |
| 3687 | { |
| 3688 | struct evhttp *http = NULL; |
| 3689 | |
| 3690 | http = evhttp_new_object(); |
| 3691 | if (http == NULL) |
| 3692 | return (NULL); |
| 3693 | http->base = base; |
| 3694 | |
| 3695 | return (http); |
| 3696 | } |
| 3697 | |
| 3698 | /* |
| 3699 | * Start a web server on the specified address and port. |
| 3700 | */ |
| 3701 | |
| 3702 | struct evhttp * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3703 | evhttp_start(const char *address, ev_uint16_t port) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3704 | { |
| 3705 | struct evhttp *http = NULL; |
| 3706 | |
| 3707 | http = evhttp_new_object(); |
| 3708 | if (http == NULL) |
| 3709 | return (NULL); |
| 3710 | if (evhttp_bind_socket(http, address, port) == -1) { |
| 3711 | mm_free(http); |
| 3712 | return (NULL); |
| 3713 | } |
| 3714 | |
| 3715 | return (http); |
| 3716 | } |
| 3717 | |
| 3718 | void |
| 3719 | evhttp_free(struct evhttp* http) |
| 3720 | { |
| 3721 | struct evhttp_cb *http_cb; |
| 3722 | struct evhttp_connection *evcon; |
| 3723 | struct evhttp_bound_socket *bound; |
| 3724 | struct evhttp* vhost; |
| 3725 | struct evhttp_server_alias *alias; |
| 3726 | |
| 3727 | /* Remove the accepting part */ |
| 3728 | while ((bound = TAILQ_FIRST(&http->sockets)) != NULL) { |
| 3729 | TAILQ_REMOVE(&http->sockets, bound, next); |
| 3730 | |
| 3731 | evconnlistener_free(bound->listener); |
| 3732 | |
| 3733 | mm_free(bound); |
| 3734 | } |
| 3735 | |
| 3736 | while ((evcon = TAILQ_FIRST(&http->connections)) != NULL) { |
| 3737 | /* evhttp_connection_free removes the connection */ |
| 3738 | evhttp_connection_free(evcon); |
| 3739 | } |
| 3740 | |
| 3741 | while ((http_cb = TAILQ_FIRST(&http->callbacks)) != NULL) { |
| 3742 | TAILQ_REMOVE(&http->callbacks, http_cb, next); |
| 3743 | mm_free(http_cb->what); |
| 3744 | mm_free(http_cb); |
| 3745 | } |
| 3746 | |
| 3747 | while ((vhost = TAILQ_FIRST(&http->virtualhosts)) != NULL) { |
| 3748 | TAILQ_REMOVE(&http->virtualhosts, vhost, next_vhost); |
| 3749 | |
| 3750 | evhttp_free(vhost); |
| 3751 | } |
| 3752 | |
| 3753 | if (http->vhost_pattern != NULL) |
| 3754 | mm_free(http->vhost_pattern); |
| 3755 | |
| 3756 | while ((alias = TAILQ_FIRST(&http->aliases)) != NULL) { |
| 3757 | TAILQ_REMOVE(&http->aliases, alias, next); |
| 3758 | mm_free(alias->alias); |
| 3759 | mm_free(alias); |
| 3760 | } |
| 3761 | |
| 3762 | mm_free(http); |
| 3763 | } |
| 3764 | |
| 3765 | int |
| 3766 | evhttp_add_virtual_host(struct evhttp* http, const char *pattern, |
| 3767 | struct evhttp* vhost) |
| 3768 | { |
| 3769 | /* a vhost can only be a vhost once and should not have bound sockets */ |
| 3770 | if (vhost->vhost_pattern != NULL || |
| 3771 | TAILQ_FIRST(&vhost->sockets) != NULL) |
| 3772 | return (-1); |
| 3773 | |
| 3774 | vhost->vhost_pattern = mm_strdup(pattern); |
| 3775 | if (vhost->vhost_pattern == NULL) |
| 3776 | return (-1); |
| 3777 | |
| 3778 | TAILQ_INSERT_TAIL(&http->virtualhosts, vhost, next_vhost); |
| 3779 | |
| 3780 | return (0); |
| 3781 | } |
| 3782 | |
| 3783 | int |
| 3784 | evhttp_remove_virtual_host(struct evhttp* http, struct evhttp* vhost) |
| 3785 | { |
| 3786 | if (vhost->vhost_pattern == NULL) |
| 3787 | return (-1); |
| 3788 | |
| 3789 | TAILQ_REMOVE(&http->virtualhosts, vhost, next_vhost); |
| 3790 | |
| 3791 | mm_free(vhost->vhost_pattern); |
| 3792 | vhost->vhost_pattern = NULL; |
| 3793 | |
| 3794 | return (0); |
| 3795 | } |
| 3796 | |
| 3797 | int |
| 3798 | evhttp_add_server_alias(struct evhttp *http, const char *alias) |
| 3799 | { |
| 3800 | struct evhttp_server_alias *evalias; |
| 3801 | |
| 3802 | evalias = mm_calloc(1, sizeof(*evalias)); |
| 3803 | if (!evalias) |
| 3804 | return -1; |
| 3805 | |
| 3806 | evalias->alias = mm_strdup(alias); |
| 3807 | if (!evalias->alias) { |
| 3808 | mm_free(evalias); |
| 3809 | return -1; |
| 3810 | } |
| 3811 | |
| 3812 | TAILQ_INSERT_TAIL(&http->aliases, evalias, next); |
| 3813 | |
| 3814 | return 0; |
| 3815 | } |
| 3816 | |
| 3817 | int |
| 3818 | evhttp_remove_server_alias(struct evhttp *http, const char *alias) |
| 3819 | { |
| 3820 | struct evhttp_server_alias *evalias; |
| 3821 | |
| 3822 | TAILQ_FOREACH(evalias, &http->aliases, next) { |
| 3823 | if (evutil_ascii_strcasecmp(evalias->alias, alias) == 0) { |
| 3824 | TAILQ_REMOVE(&http->aliases, evalias, next); |
| 3825 | mm_free(evalias->alias); |
| 3826 | mm_free(evalias); |
| 3827 | return 0; |
| 3828 | } |
| 3829 | } |
| 3830 | |
| 3831 | return -1; |
| 3832 | } |
| 3833 | |
| 3834 | void |
| 3835 | evhttp_set_timeout(struct evhttp* http, int timeout_in_secs) |
| 3836 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3837 | if (timeout_in_secs == -1) { |
| 3838 | evhttp_set_timeout_tv(http, NULL); |
| 3839 | } else { |
| 3840 | struct timeval tv; |
| 3841 | tv.tv_sec = timeout_in_secs; |
| 3842 | tv.tv_usec = 0; |
| 3843 | evhttp_set_timeout_tv(http, &tv); |
| 3844 | } |
| 3845 | } |
| 3846 | |
| 3847 | void |
| 3848 | evhttp_set_timeout_tv(struct evhttp* http, const struct timeval* tv) |
| 3849 | { |
| 3850 | if (tv) { |
| 3851 | http->timeout = *tv; |
| 3852 | } else { |
| 3853 | evutil_timerclear(&http->timeout); |
| 3854 | } |
| 3855 | } |
| 3856 | |
| 3857 | int evhttp_set_flags(struct evhttp *http, int flags) |
| 3858 | { |
| 3859 | int avail_flags = 0; |
| 3860 | avail_flags |= EVHTTP_SERVER_LINGERING_CLOSE; |
| 3861 | |
| 3862 | if (flags & ~avail_flags) |
| 3863 | return 1; |
| 3864 | http->flags &= ~avail_flags; |
| 3865 | |
| 3866 | http->flags |= flags; |
| 3867 | |
| 3868 | return 0; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3869 | } |
| 3870 | |
| 3871 | void |
| 3872 | evhttp_set_max_headers_size(struct evhttp* http, ev_ssize_t max_headers_size) |
| 3873 | { |
| 3874 | if (max_headers_size < 0) |
| 3875 | http->default_max_headers_size = EV_SIZE_MAX; |
| 3876 | else |
| 3877 | http->default_max_headers_size = max_headers_size; |
| 3878 | } |
| 3879 | |
| 3880 | void |
| 3881 | evhttp_set_max_body_size(struct evhttp* http, ev_ssize_t max_body_size) |
| 3882 | { |
| 3883 | if (max_body_size < 0) |
| 3884 | http->default_max_body_size = EV_UINT64_MAX; |
| 3885 | else |
| 3886 | http->default_max_body_size = max_body_size; |
| 3887 | } |
| 3888 | |
| 3889 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3890 | evhttp_set_default_content_type(struct evhttp *http, |
| 3891 | const char *content_type) { |
| 3892 | http->default_content_type = content_type; |
| 3893 | } |
| 3894 | |
| 3895 | void |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3896 | evhttp_set_allowed_methods(struct evhttp* http, ev_uint16_t methods) |
| 3897 | { |
| 3898 | http->allowed_methods = methods; |
| 3899 | } |
| 3900 | |
| 3901 | int |
| 3902 | evhttp_set_cb(struct evhttp *http, const char *uri, |
| 3903 | void (*cb)(struct evhttp_request *, void *), void *cbarg) |
| 3904 | { |
| 3905 | struct evhttp_cb *http_cb; |
| 3906 | |
| 3907 | TAILQ_FOREACH(http_cb, &http->callbacks, next) { |
| 3908 | if (strcmp(http_cb->what, uri) == 0) |
| 3909 | return (-1); |
| 3910 | } |
| 3911 | |
| 3912 | if ((http_cb = mm_calloc(1, sizeof(struct evhttp_cb))) == NULL) { |
| 3913 | event_warn("%s: calloc", __func__); |
| 3914 | return (-2); |
| 3915 | } |
| 3916 | |
| 3917 | http_cb->what = mm_strdup(uri); |
| 3918 | if (http_cb->what == NULL) { |
| 3919 | event_warn("%s: strdup", __func__); |
| 3920 | mm_free(http_cb); |
| 3921 | return (-3); |
| 3922 | } |
| 3923 | http_cb->cb = cb; |
| 3924 | http_cb->cbarg = cbarg; |
| 3925 | |
| 3926 | TAILQ_INSERT_TAIL(&http->callbacks, http_cb, next); |
| 3927 | |
| 3928 | return (0); |
| 3929 | } |
| 3930 | |
| 3931 | int |
| 3932 | evhttp_del_cb(struct evhttp *http, const char *uri) |
| 3933 | { |
| 3934 | struct evhttp_cb *http_cb; |
| 3935 | |
| 3936 | TAILQ_FOREACH(http_cb, &http->callbacks, next) { |
| 3937 | if (strcmp(http_cb->what, uri) == 0) |
| 3938 | break; |
| 3939 | } |
| 3940 | if (http_cb == NULL) |
| 3941 | return (-1); |
| 3942 | |
| 3943 | TAILQ_REMOVE(&http->callbacks, http_cb, next); |
| 3944 | mm_free(http_cb->what); |
| 3945 | mm_free(http_cb); |
| 3946 | |
| 3947 | return (0); |
| 3948 | } |
| 3949 | |
| 3950 | void |
| 3951 | evhttp_set_gencb(struct evhttp *http, |
| 3952 | void (*cb)(struct evhttp_request *, void *), void *cbarg) |
| 3953 | { |
| 3954 | http->gencb = cb; |
| 3955 | http->gencbarg = cbarg; |
| 3956 | } |
| 3957 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 3958 | void |
| 3959 | evhttp_set_bevcb(struct evhttp *http, |
| 3960 | struct bufferevent* (*cb)(struct event_base *, void *), void *cbarg) |
| 3961 | { |
| 3962 | http->bevcb = cb; |
| 3963 | http->bevcbarg = cbarg; |
| 3964 | } |
| 3965 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 3966 | /* |
| 3967 | * Request related functions |
| 3968 | */ |
| 3969 | |
| 3970 | struct evhttp_request * |
| 3971 | evhttp_request_new(void (*cb)(struct evhttp_request *, void *), void *arg) |
| 3972 | { |
| 3973 | struct evhttp_request *req = NULL; |
| 3974 | |
| 3975 | /* Allocate request structure */ |
| 3976 | if ((req = mm_calloc(1, sizeof(struct evhttp_request))) == NULL) { |
| 3977 | event_warn("%s: calloc", __func__); |
| 3978 | goto error; |
| 3979 | } |
| 3980 | |
| 3981 | req->headers_size = 0; |
| 3982 | req->body_size = 0; |
| 3983 | |
| 3984 | req->kind = EVHTTP_RESPONSE; |
| 3985 | req->input_headers = mm_calloc(1, sizeof(struct evkeyvalq)); |
| 3986 | if (req->input_headers == NULL) { |
| 3987 | event_warn("%s: calloc", __func__); |
| 3988 | goto error; |
| 3989 | } |
| 3990 | TAILQ_INIT(req->input_headers); |
| 3991 | |
| 3992 | req->output_headers = mm_calloc(1, sizeof(struct evkeyvalq)); |
| 3993 | if (req->output_headers == NULL) { |
| 3994 | event_warn("%s: calloc", __func__); |
| 3995 | goto error; |
| 3996 | } |
| 3997 | TAILQ_INIT(req->output_headers); |
| 3998 | |
| 3999 | if ((req->input_buffer = evbuffer_new()) == NULL) { |
| 4000 | event_warn("%s: evbuffer_new", __func__); |
| 4001 | goto error; |
| 4002 | } |
| 4003 | |
| 4004 | if ((req->output_buffer = evbuffer_new()) == NULL) { |
| 4005 | event_warn("%s: evbuffer_new", __func__); |
| 4006 | goto error; |
| 4007 | } |
| 4008 | |
| 4009 | req->cb = cb; |
| 4010 | req->cb_arg = arg; |
| 4011 | |
| 4012 | return (req); |
| 4013 | |
| 4014 | error: |
| 4015 | if (req != NULL) |
| 4016 | evhttp_request_free(req); |
| 4017 | return (NULL); |
| 4018 | } |
| 4019 | |
| 4020 | void |
| 4021 | evhttp_request_free(struct evhttp_request *req) |
| 4022 | { |
| 4023 | if ((req->flags & EVHTTP_REQ_DEFER_FREE) != 0) { |
| 4024 | req->flags |= EVHTTP_REQ_NEEDS_FREE; |
| 4025 | return; |
| 4026 | } |
| 4027 | |
| 4028 | if (req->remote_host != NULL) |
| 4029 | mm_free(req->remote_host); |
| 4030 | if (req->uri != NULL) |
| 4031 | mm_free(req->uri); |
| 4032 | if (req->uri_elems != NULL) |
| 4033 | evhttp_uri_free(req->uri_elems); |
| 4034 | if (req->response_code_line != NULL) |
| 4035 | mm_free(req->response_code_line); |
| 4036 | if (req->host_cache != NULL) |
| 4037 | mm_free(req->host_cache); |
| 4038 | |
| 4039 | evhttp_clear_headers(req->input_headers); |
| 4040 | mm_free(req->input_headers); |
| 4041 | |
| 4042 | evhttp_clear_headers(req->output_headers); |
| 4043 | mm_free(req->output_headers); |
| 4044 | |
| 4045 | if (req->input_buffer != NULL) |
| 4046 | evbuffer_free(req->input_buffer); |
| 4047 | |
| 4048 | if (req->output_buffer != NULL) |
| 4049 | evbuffer_free(req->output_buffer); |
| 4050 | |
| 4051 | mm_free(req); |
| 4052 | } |
| 4053 | |
| 4054 | void |
| 4055 | evhttp_request_own(struct evhttp_request *req) |
| 4056 | { |
| 4057 | req->flags |= EVHTTP_USER_OWNED; |
| 4058 | } |
| 4059 | |
| 4060 | int |
| 4061 | evhttp_request_is_owned(struct evhttp_request *req) |
| 4062 | { |
| 4063 | return (req->flags & EVHTTP_USER_OWNED) != 0; |
| 4064 | } |
| 4065 | |
| 4066 | struct evhttp_connection * |
| 4067 | evhttp_request_get_connection(struct evhttp_request *req) |
| 4068 | { |
| 4069 | return req->evcon; |
| 4070 | } |
| 4071 | |
| 4072 | struct event_base * |
| 4073 | evhttp_connection_get_base(struct evhttp_connection *conn) |
| 4074 | { |
| 4075 | return conn->base; |
| 4076 | } |
| 4077 | |
| 4078 | void |
| 4079 | evhttp_request_set_chunked_cb(struct evhttp_request *req, |
| 4080 | void (*cb)(struct evhttp_request *, void *)) |
| 4081 | { |
| 4082 | req->chunk_cb = cb; |
| 4083 | } |
| 4084 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4085 | void |
| 4086 | evhttp_request_set_header_cb(struct evhttp_request *req, |
| 4087 | int (*cb)(struct evhttp_request *, void *)) |
| 4088 | { |
| 4089 | req->header_cb = cb; |
| 4090 | } |
| 4091 | |
| 4092 | void |
| 4093 | evhttp_request_set_error_cb(struct evhttp_request *req, |
| 4094 | void (*cb)(enum evhttp_request_error, void *)) |
| 4095 | { |
| 4096 | req->error_cb = cb; |
| 4097 | } |
| 4098 | |
| 4099 | void |
| 4100 | evhttp_request_set_on_complete_cb(struct evhttp_request *req, |
| 4101 | void (*cb)(struct evhttp_request *, void *), void *cb_arg) |
| 4102 | { |
| 4103 | req->on_complete_cb = cb; |
| 4104 | req->on_complete_cb_arg = cb_arg; |
| 4105 | } |
| 4106 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4107 | /* |
| 4108 | * Allows for inspection of the request URI |
| 4109 | */ |
| 4110 | |
| 4111 | const char * |
| 4112 | evhttp_request_get_uri(const struct evhttp_request *req) { |
| 4113 | if (req->uri == NULL) |
| 4114 | event_debug(("%s: request %p has no uri\n", __func__, req)); |
| 4115 | return (req->uri); |
| 4116 | } |
| 4117 | |
| 4118 | const struct evhttp_uri * |
| 4119 | evhttp_request_get_evhttp_uri(const struct evhttp_request *req) { |
| 4120 | if (req->uri_elems == NULL) |
| 4121 | event_debug(("%s: request %p has no uri elems\n", |
| 4122 | __func__, req)); |
| 4123 | return (req->uri_elems); |
| 4124 | } |
| 4125 | |
| 4126 | const char * |
| 4127 | evhttp_request_get_host(struct evhttp_request *req) |
| 4128 | { |
| 4129 | const char *host = NULL; |
| 4130 | |
| 4131 | if (req->host_cache) |
| 4132 | return req->host_cache; |
| 4133 | |
| 4134 | if (req->uri_elems) |
| 4135 | host = evhttp_uri_get_host(req->uri_elems); |
| 4136 | if (!host && req->input_headers) { |
| 4137 | const char *p; |
| 4138 | size_t len; |
| 4139 | |
| 4140 | host = evhttp_find_header(req->input_headers, "Host"); |
| 4141 | /* The Host: header may include a port. Remove it here |
| 4142 | to be consistent with uri_elems case above. */ |
| 4143 | if (host) { |
| 4144 | p = host + strlen(host) - 1; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4145 | while (p > host && EVUTIL_ISDIGIT_(*p)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4146 | --p; |
| 4147 | if (p > host && *p == ':') { |
| 4148 | len = p - host; |
| 4149 | req->host_cache = mm_malloc(len + 1); |
| 4150 | if (!req->host_cache) { |
| 4151 | event_warn("%s: malloc", __func__); |
| 4152 | return NULL; |
| 4153 | } |
| 4154 | memcpy(req->host_cache, host, len); |
| 4155 | req->host_cache[len] = '\0'; |
| 4156 | host = req->host_cache; |
| 4157 | } |
| 4158 | } |
| 4159 | } |
| 4160 | |
| 4161 | return host; |
| 4162 | } |
| 4163 | |
| 4164 | enum evhttp_cmd_type |
| 4165 | evhttp_request_get_command(const struct evhttp_request *req) { |
| 4166 | return (req->type); |
| 4167 | } |
| 4168 | |
| 4169 | int |
| 4170 | evhttp_request_get_response_code(const struct evhttp_request *req) |
| 4171 | { |
| 4172 | return req->response_code; |
| 4173 | } |
| 4174 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4175 | const char * |
| 4176 | evhttp_request_get_response_code_line(const struct evhttp_request *req) |
| 4177 | { |
| 4178 | return req->response_code_line; |
| 4179 | } |
| 4180 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4181 | /** Returns the input headers */ |
| 4182 | struct evkeyvalq *evhttp_request_get_input_headers(struct evhttp_request *req) |
| 4183 | { |
| 4184 | return (req->input_headers); |
| 4185 | } |
| 4186 | |
| 4187 | /** Returns the output headers */ |
| 4188 | struct evkeyvalq *evhttp_request_get_output_headers(struct evhttp_request *req) |
| 4189 | { |
| 4190 | return (req->output_headers); |
| 4191 | } |
| 4192 | |
| 4193 | /** Returns the input buffer */ |
| 4194 | struct evbuffer *evhttp_request_get_input_buffer(struct evhttp_request *req) |
| 4195 | { |
| 4196 | return (req->input_buffer); |
| 4197 | } |
| 4198 | |
| 4199 | /** Returns the output buffer */ |
| 4200 | struct evbuffer *evhttp_request_get_output_buffer(struct evhttp_request *req) |
| 4201 | { |
| 4202 | return (req->output_buffer); |
| 4203 | } |
| 4204 | |
| 4205 | |
| 4206 | /* |
| 4207 | * Takes a file descriptor to read a request from. |
| 4208 | * The callback is executed once the whole request has been read. |
| 4209 | */ |
| 4210 | |
| 4211 | static struct evhttp_connection* |
| 4212 | evhttp_get_request_connection( |
| 4213 | struct evhttp* http, |
| 4214 | evutil_socket_t fd, struct sockaddr *sa, ev_socklen_t salen) |
| 4215 | { |
| 4216 | struct evhttp_connection *evcon; |
| 4217 | char *hostname = NULL, *portname = NULL; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4218 | struct bufferevent* bev = NULL; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4219 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 4220 | #ifdef EVENT__HAVE_STRUCT_SOCKADDR_UN |
| 4221 | if (sa->sa_family == AF_UNIX) { |
| 4222 | struct sockaddr_un *sa_un = (struct sockaddr_un *)sa; |
| 4223 | sa_un->sun_path[0] = '\0'; |
| 4224 | } |
| 4225 | #endif |
| 4226 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4227 | name_from_addr(sa, salen, &hostname, &portname); |
| 4228 | if (hostname == NULL || portname == NULL) { |
| 4229 | if (hostname) mm_free(hostname); |
| 4230 | if (portname) mm_free(portname); |
| 4231 | return (NULL); |
| 4232 | } |
| 4233 | |
| 4234 | event_debug(("%s: new request from %s:%s on "EV_SOCK_FMT"\n", |
| 4235 | __func__, hostname, portname, EV_SOCK_ARG(fd))); |
| 4236 | |
| 4237 | /* we need a connection object to put the http request on */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4238 | if (http->bevcb != NULL) { |
| 4239 | bev = (*http->bevcb)(http->base, http->bevcbarg); |
| 4240 | } |
| 4241 | evcon = evhttp_connection_base_bufferevent_new( |
| 4242 | http->base, NULL, bev, hostname, atoi(portname)); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4243 | mm_free(hostname); |
| 4244 | mm_free(portname); |
| 4245 | if (evcon == NULL) |
| 4246 | return (NULL); |
| 4247 | |
| 4248 | evcon->max_headers_size = http->default_max_headers_size; |
| 4249 | evcon->max_body_size = http->default_max_body_size; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4250 | if (http->flags & EVHTTP_SERVER_LINGERING_CLOSE) |
| 4251 | evcon->flags |= EVHTTP_CON_LINGERING_CLOSE; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4252 | |
| 4253 | evcon->flags |= EVHTTP_CON_INCOMING; |
| 4254 | evcon->state = EVCON_READING_FIRSTLINE; |
| 4255 | |
| 4256 | evcon->fd = fd; |
| 4257 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 4258 | if (bufferevent_setfd(evcon->bufev, fd)) |
| 4259 | goto err; |
| 4260 | if (bufferevent_enable(evcon->bufev, EV_READ)) |
| 4261 | goto err; |
| 4262 | if (bufferevent_disable(evcon->bufev, EV_WRITE)) |
| 4263 | goto err; |
| 4264 | bufferevent_socket_set_conn_address_(evcon->bufev, sa, salen); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4265 | |
| 4266 | return (evcon); |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 4267 | |
| 4268 | err: |
| 4269 | evhttp_connection_free(evcon); |
| 4270 | return (NULL); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4271 | } |
| 4272 | |
| 4273 | static int |
| 4274 | evhttp_associate_new_request_with_connection(struct evhttp_connection *evcon) |
| 4275 | { |
| 4276 | struct evhttp *http = evcon->http_server; |
| 4277 | struct evhttp_request *req; |
| 4278 | if ((req = evhttp_request_new(evhttp_handle_request, http)) == NULL) |
| 4279 | return (-1); |
| 4280 | |
| 4281 | if ((req->remote_host = mm_strdup(evcon->address)) == NULL) { |
| 4282 | event_warn("%s: strdup", __func__); |
| 4283 | evhttp_request_free(req); |
| 4284 | return (-1); |
| 4285 | } |
| 4286 | req->remote_port = evcon->port; |
| 4287 | |
| 4288 | req->evcon = evcon; /* the request ends up owning the connection */ |
| 4289 | req->flags |= EVHTTP_REQ_OWN_CONNECTION; |
| 4290 | |
| 4291 | /* We did not present the request to the user user yet, so treat it as |
| 4292 | * if the user was done with the request. This allows us to free the |
| 4293 | * request on a persistent connection if the client drops it without |
| 4294 | * sending a request. |
| 4295 | */ |
| 4296 | req->userdone = 1; |
| 4297 | |
| 4298 | TAILQ_INSERT_TAIL(&evcon->requests, req, next); |
| 4299 | |
| 4300 | req->kind = EVHTTP_REQUEST; |
| 4301 | |
| 4302 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4303 | evhttp_start_read_(evcon); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4304 | |
| 4305 | return (0); |
| 4306 | } |
| 4307 | |
| 4308 | static void |
| 4309 | evhttp_get_request(struct evhttp *http, evutil_socket_t fd, |
| 4310 | struct sockaddr *sa, ev_socklen_t salen) |
| 4311 | { |
| 4312 | struct evhttp_connection *evcon; |
| 4313 | |
| 4314 | evcon = evhttp_get_request_connection(http, fd, sa, salen); |
| 4315 | if (evcon == NULL) { |
| 4316 | event_sock_warn(fd, "%s: cannot get connection on "EV_SOCK_FMT, |
| 4317 | __func__, EV_SOCK_ARG(fd)); |
| 4318 | evutil_closesocket(fd); |
| 4319 | return; |
| 4320 | } |
| 4321 | |
| 4322 | /* the timeout can be used by the server to close idle connections */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4323 | if (evutil_timerisset(&http->timeout)) |
| 4324 | evhttp_connection_set_timeout_tv(evcon, &http->timeout); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4325 | |
| 4326 | /* |
| 4327 | * if we want to accept more than one request on a connection, |
| 4328 | * we need to know which http server it belongs to. |
| 4329 | */ |
| 4330 | evcon->http_server = http; |
| 4331 | TAILQ_INSERT_TAIL(&http->connections, evcon, next); |
| 4332 | |
| 4333 | if (evhttp_associate_new_request_with_connection(evcon) == -1) |
| 4334 | evhttp_connection_free(evcon); |
| 4335 | } |
| 4336 | |
| 4337 | |
| 4338 | /* |
| 4339 | * Network helper functions that we do not want to export to the rest of |
| 4340 | * the world. |
| 4341 | */ |
| 4342 | |
| 4343 | static void |
| 4344 | name_from_addr(struct sockaddr *sa, ev_socklen_t salen, |
| 4345 | char **phost, char **pport) |
| 4346 | { |
| 4347 | char ntop[NI_MAXHOST]; |
| 4348 | char strport[NI_MAXSERV]; |
| 4349 | int ni_result; |
| 4350 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4351 | #ifdef EVENT__HAVE_GETNAMEINFO |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4352 | ni_result = getnameinfo(sa, salen, |
| 4353 | ntop, sizeof(ntop), strport, sizeof(strport), |
| 4354 | NI_NUMERICHOST|NI_NUMERICSERV); |
| 4355 | |
| 4356 | if (ni_result != 0) { |
| 4357 | #ifdef EAI_SYSTEM |
| 4358 | /* Windows doesn't have an EAI_SYSTEM. */ |
| 4359 | if (ni_result == EAI_SYSTEM) |
| 4360 | event_err(1, "getnameinfo failed"); |
| 4361 | else |
| 4362 | #endif |
| 4363 | event_errx(1, "getnameinfo failed: %s", gai_strerror(ni_result)); |
| 4364 | return; |
| 4365 | } |
| 4366 | #else |
| 4367 | ni_result = fake_getnameinfo(sa, salen, |
| 4368 | ntop, sizeof(ntop), strport, sizeof(strport), |
| 4369 | NI_NUMERICHOST|NI_NUMERICSERV); |
| 4370 | if (ni_result != 0) |
| 4371 | return; |
| 4372 | #endif |
| 4373 | |
| 4374 | *phost = mm_strdup(ntop); |
| 4375 | *pport = mm_strdup(strport); |
| 4376 | } |
| 4377 | |
| 4378 | /* Create a non-blocking socket and bind it */ |
| 4379 | /* todo: rename this function */ |
| 4380 | static evutil_socket_t |
| 4381 | bind_socket_ai(struct evutil_addrinfo *ai, int reuse) |
| 4382 | { |
| 4383 | evutil_socket_t fd; |
| 4384 | |
| 4385 | int on = 1, r; |
| 4386 | int serrno; |
| 4387 | |
| 4388 | /* Create listen socket */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4389 | fd = evutil_socket_(ai ? ai->ai_family : AF_INET, |
| 4390 | SOCK_STREAM|EVUTIL_SOCK_NONBLOCK|EVUTIL_SOCK_CLOEXEC, 0); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4391 | if (fd == -1) { |
| 4392 | event_sock_warn(-1, "socket"); |
| 4393 | return (-1); |
| 4394 | } |
| 4395 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4396 | if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof(on))<0) |
| 4397 | goto out; |
| 4398 | if (reuse) { |
| 4399 | if (evutil_make_listen_socket_reuseable(fd) < 0) |
| 4400 | goto out; |
| 4401 | } |
| 4402 | |
| 4403 | if (ai != NULL) { |
| 4404 | r = bind(fd, ai->ai_addr, (ev_socklen_t)ai->ai_addrlen); |
| 4405 | if (r == -1) |
| 4406 | goto out; |
| 4407 | } |
| 4408 | |
| 4409 | return (fd); |
| 4410 | |
| 4411 | out: |
| 4412 | serrno = EVUTIL_SOCKET_ERROR(); |
| 4413 | evutil_closesocket(fd); |
| 4414 | EVUTIL_SET_SOCKET_ERROR(serrno); |
| 4415 | return (-1); |
| 4416 | } |
| 4417 | |
| 4418 | static struct evutil_addrinfo * |
| 4419 | make_addrinfo(const char *address, ev_uint16_t port) |
| 4420 | { |
| 4421 | struct evutil_addrinfo *ai = NULL; |
| 4422 | |
| 4423 | struct evutil_addrinfo hints; |
| 4424 | char strport[NI_MAXSERV]; |
| 4425 | int ai_result; |
| 4426 | |
| 4427 | memset(&hints, 0, sizeof(hints)); |
| 4428 | hints.ai_family = AF_UNSPEC; |
| 4429 | hints.ai_socktype = SOCK_STREAM; |
| 4430 | /* turn NULL hostname into INADDR_ANY, and skip looking up any address |
| 4431 | * types we don't have an interface to connect to. */ |
| 4432 | hints.ai_flags = EVUTIL_AI_PASSIVE|EVUTIL_AI_ADDRCONFIG; |
| 4433 | evutil_snprintf(strport, sizeof(strport), "%d", port); |
| 4434 | if ((ai_result = evutil_getaddrinfo(address, strport, &hints, &ai)) |
| 4435 | != 0) { |
| 4436 | if (ai_result == EVUTIL_EAI_SYSTEM) |
| 4437 | event_warn("getaddrinfo"); |
| 4438 | else |
| 4439 | event_warnx("getaddrinfo: %s", |
| 4440 | evutil_gai_strerror(ai_result)); |
| 4441 | return (NULL); |
| 4442 | } |
| 4443 | |
| 4444 | return (ai); |
| 4445 | } |
| 4446 | |
| 4447 | static evutil_socket_t |
| 4448 | bind_socket(const char *address, ev_uint16_t port, int reuse) |
| 4449 | { |
| 4450 | evutil_socket_t fd; |
| 4451 | struct evutil_addrinfo *aitop = NULL; |
| 4452 | |
| 4453 | /* just create an unbound socket */ |
| 4454 | if (address == NULL && port == 0) |
| 4455 | return bind_socket_ai(NULL, 0); |
| 4456 | |
| 4457 | aitop = make_addrinfo(address, port); |
| 4458 | |
| 4459 | if (aitop == NULL) |
| 4460 | return (-1); |
| 4461 | |
| 4462 | fd = bind_socket_ai(aitop, reuse); |
| 4463 | |
| 4464 | evutil_freeaddrinfo(aitop); |
| 4465 | |
| 4466 | return (fd); |
| 4467 | } |
| 4468 | |
| 4469 | struct evhttp_uri { |
| 4470 | unsigned flags; |
| 4471 | char *scheme; /* scheme; e.g http, ftp etc */ |
| 4472 | char *userinfo; /* userinfo (typically username:pass), or NULL */ |
| 4473 | char *host; /* hostname, IP address, or NULL */ |
| 4474 | int port; /* port, or zero */ |
| 4475 | char *path; /* path, or "". */ |
| 4476 | char *query; /* query, or NULL */ |
| 4477 | char *fragment; /* fragment or NULL */ |
| 4478 | }; |
| 4479 | |
| 4480 | struct evhttp_uri * |
| 4481 | evhttp_uri_new(void) |
| 4482 | { |
| 4483 | struct evhttp_uri *uri = mm_calloc(sizeof(struct evhttp_uri), 1); |
| 4484 | if (uri) |
| 4485 | uri->port = -1; |
| 4486 | return uri; |
| 4487 | } |
| 4488 | |
| 4489 | void |
| 4490 | evhttp_uri_set_flags(struct evhttp_uri *uri, unsigned flags) |
| 4491 | { |
| 4492 | uri->flags = flags; |
| 4493 | } |
| 4494 | |
| 4495 | /* Return true if the string starting at s and ending immediately before eos |
| 4496 | * is a valid URI scheme according to RFC3986 |
| 4497 | */ |
| 4498 | static int |
| 4499 | scheme_ok(const char *s, const char *eos) |
| 4500 | { |
| 4501 | /* scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) */ |
| 4502 | EVUTIL_ASSERT(eos >= s); |
| 4503 | if (s == eos) |
| 4504 | return 0; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4505 | if (!EVUTIL_ISALPHA_(*s)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4506 | return 0; |
| 4507 | while (++s < eos) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4508 | if (! EVUTIL_ISALNUM_(*s) && |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4509 | *s != '+' && *s != '-' && *s != '.') |
| 4510 | return 0; |
| 4511 | } |
| 4512 | return 1; |
| 4513 | } |
| 4514 | |
| 4515 | #define SUBDELIMS "!$&'()*+,;=" |
| 4516 | |
| 4517 | /* Return true iff [s..eos) is a valid userinfo */ |
| 4518 | static int |
| 4519 | userinfo_ok(const char *s, const char *eos) |
| 4520 | { |
| 4521 | while (s < eos) { |
| 4522 | if (CHAR_IS_UNRESERVED(*s) || |
| 4523 | strchr(SUBDELIMS, *s) || |
| 4524 | *s == ':') |
| 4525 | ++s; |
| 4526 | else if (*s == '%' && s+2 < eos && |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4527 | EVUTIL_ISXDIGIT_(s[1]) && |
| 4528 | EVUTIL_ISXDIGIT_(s[2])) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4529 | s += 3; |
| 4530 | else |
| 4531 | return 0; |
| 4532 | } |
| 4533 | return 1; |
| 4534 | } |
| 4535 | |
| 4536 | static int |
| 4537 | regname_ok(const char *s, const char *eos) |
| 4538 | { |
| 4539 | while (s && s<eos) { |
| 4540 | if (CHAR_IS_UNRESERVED(*s) || |
| 4541 | strchr(SUBDELIMS, *s)) |
| 4542 | ++s; |
| 4543 | else if (*s == '%' && |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4544 | EVUTIL_ISXDIGIT_(s[1]) && |
| 4545 | EVUTIL_ISXDIGIT_(s[2])) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4546 | s += 3; |
| 4547 | else |
| 4548 | return 0; |
| 4549 | } |
| 4550 | return 1; |
| 4551 | } |
| 4552 | |
| 4553 | static int |
| 4554 | parse_port(const char *s, const char *eos) |
| 4555 | { |
| 4556 | int portnum = 0; |
| 4557 | while (s < eos) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4558 | if (! EVUTIL_ISDIGIT_(*s)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4559 | return -1; |
| 4560 | portnum = (portnum * 10) + (*s - '0'); |
| 4561 | if (portnum < 0) |
| 4562 | return -1; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4563 | if (portnum > 65535) |
| 4564 | return -1; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4565 | ++s; |
| 4566 | } |
| 4567 | return portnum; |
| 4568 | } |
| 4569 | |
| 4570 | /* returns 0 for bad, 1 for ipv6, 2 for IPvFuture */ |
| 4571 | static int |
| 4572 | bracket_addr_ok(const char *s, const char *eos) |
| 4573 | { |
| 4574 | if (s + 3 > eos || *s != '[' || *(eos-1) != ']') |
| 4575 | return 0; |
| 4576 | if (s[1] == 'v') { |
| 4577 | /* IPvFuture, or junk. |
| 4578 | "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" ) |
| 4579 | */ |
| 4580 | s += 2; /* skip [v */ |
| 4581 | --eos; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4582 | if (!EVUTIL_ISXDIGIT_(*s)) /*require at least one*/ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4583 | return 0; |
| 4584 | while (s < eos && *s != '.') { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4585 | if (EVUTIL_ISXDIGIT_(*s)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4586 | ++s; |
| 4587 | else |
| 4588 | return 0; |
| 4589 | } |
| 4590 | if (*s != '.') |
| 4591 | return 0; |
| 4592 | ++s; |
| 4593 | while (s < eos) { |
| 4594 | if (CHAR_IS_UNRESERVED(*s) || |
| 4595 | strchr(SUBDELIMS, *s) || |
| 4596 | *s == ':') |
| 4597 | ++s; |
| 4598 | else |
| 4599 | return 0; |
| 4600 | } |
| 4601 | return 2; |
| 4602 | } else { |
| 4603 | /* IPv6, or junk */ |
| 4604 | char buf[64]; |
| 4605 | ev_ssize_t n_chars = eos-s-2; |
| 4606 | struct in6_addr in6; |
| 4607 | if (n_chars >= 64) /* way too long */ |
| 4608 | return 0; |
| 4609 | memcpy(buf, s+1, n_chars); |
| 4610 | buf[n_chars]='\0'; |
| 4611 | return (evutil_inet_pton(AF_INET6,buf,&in6)==1) ? 1 : 0; |
| 4612 | } |
| 4613 | } |
| 4614 | |
| 4615 | static int |
| 4616 | parse_authority(struct evhttp_uri *uri, char *s, char *eos) |
| 4617 | { |
| 4618 | char *cp, *port; |
| 4619 | EVUTIL_ASSERT(eos); |
| 4620 | if (eos == s) { |
| 4621 | uri->host = mm_strdup(""); |
| 4622 | if (uri->host == NULL) { |
| 4623 | event_warn("%s: strdup", __func__); |
| 4624 | return -1; |
| 4625 | } |
| 4626 | return 0; |
| 4627 | } |
| 4628 | |
| 4629 | /* Optionally, we start with "userinfo@" */ |
| 4630 | |
| 4631 | cp = strchr(s, '@'); |
| 4632 | if (cp && cp < eos) { |
| 4633 | if (! userinfo_ok(s,cp)) |
| 4634 | return -1; |
| 4635 | *cp++ = '\0'; |
| 4636 | uri->userinfo = mm_strdup(s); |
| 4637 | if (uri->userinfo == NULL) { |
| 4638 | event_warn("%s: strdup", __func__); |
| 4639 | return -1; |
| 4640 | } |
| 4641 | } else { |
| 4642 | cp = s; |
| 4643 | } |
| 4644 | /* Optionally, we end with ":port" */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4645 | for (port=eos-1; port >= cp && EVUTIL_ISDIGIT_(*port); --port) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4646 | ; |
| 4647 | if (port >= cp && *port == ':') { |
| 4648 | if (port+1 == eos) /* Leave port unspecified; the RFC allows a |
| 4649 | * nil port */ |
| 4650 | uri->port = -1; |
| 4651 | else if ((uri->port = parse_port(port+1, eos))<0) |
| 4652 | return -1; |
| 4653 | eos = port; |
| 4654 | } |
| 4655 | /* Now, cp..eos holds the "host" port, which can be an IPv4Address, |
| 4656 | * an IP-Literal, or a reg-name */ |
| 4657 | EVUTIL_ASSERT(eos >= cp); |
| 4658 | if (*cp == '[' && eos >= cp+2 && *(eos-1) == ']') { |
| 4659 | /* IPv6address, IP-Literal, or junk. */ |
| 4660 | if (! bracket_addr_ok(cp, eos)) |
| 4661 | return -1; |
| 4662 | } else { |
| 4663 | /* Make sure the host part is ok. */ |
| 4664 | if (! regname_ok(cp,eos)) /* Match IPv4Address or reg-name */ |
| 4665 | return -1; |
| 4666 | } |
| 4667 | uri->host = mm_malloc(eos-cp+1); |
| 4668 | if (uri->host == NULL) { |
| 4669 | event_warn("%s: malloc", __func__); |
| 4670 | return -1; |
| 4671 | } |
| 4672 | memcpy(uri->host, cp, eos-cp); |
| 4673 | uri->host[eos-cp] = '\0'; |
| 4674 | return 0; |
| 4675 | |
| 4676 | } |
| 4677 | |
| 4678 | static char * |
| 4679 | end_of_authority(char *cp) |
| 4680 | { |
| 4681 | while (*cp) { |
| 4682 | if (*cp == '?' || *cp == '#' || *cp == '/') |
| 4683 | return cp; |
| 4684 | ++cp; |
| 4685 | } |
| 4686 | return cp; |
| 4687 | } |
| 4688 | |
| 4689 | enum uri_part { |
| 4690 | PART_PATH, |
| 4691 | PART_QUERY, |
| 4692 | PART_FRAGMENT |
| 4693 | }; |
| 4694 | |
| 4695 | /* Return the character after the longest prefix of 'cp' that matches... |
| 4696 | * *pchar / "/" if allow_qchars is false, or |
| 4697 | * *(pchar / "/" / "?") if allow_qchars is true. |
| 4698 | */ |
| 4699 | static char * |
| 4700 | end_of_path(char *cp, enum uri_part part, unsigned flags) |
| 4701 | { |
| 4702 | if (flags & EVHTTP_URI_NONCONFORMANT) { |
| 4703 | /* If NONCONFORMANT: |
| 4704 | * Path is everything up to a # or ? or nul. |
| 4705 | * Query is everything up a # or nul |
| 4706 | * Fragment is everything up to a nul. |
| 4707 | */ |
| 4708 | switch (part) { |
| 4709 | case PART_PATH: |
| 4710 | while (*cp && *cp != '#' && *cp != '?') |
| 4711 | ++cp; |
| 4712 | break; |
| 4713 | case PART_QUERY: |
| 4714 | while (*cp && *cp != '#') |
| 4715 | ++cp; |
| 4716 | break; |
| 4717 | case PART_FRAGMENT: |
| 4718 | cp += strlen(cp); |
| 4719 | break; |
| 4720 | }; |
| 4721 | return cp; |
| 4722 | } |
| 4723 | |
| 4724 | while (*cp) { |
| 4725 | if (CHAR_IS_UNRESERVED(*cp) || |
| 4726 | strchr(SUBDELIMS, *cp) || |
| 4727 | *cp == ':' || *cp == '@' || *cp == '/') |
| 4728 | ++cp; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4729 | else if (*cp == '%' && EVUTIL_ISXDIGIT_(cp[1]) && |
| 4730 | EVUTIL_ISXDIGIT_(cp[2])) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4731 | cp += 3; |
| 4732 | else if (*cp == '?' && part != PART_PATH) |
| 4733 | ++cp; |
| 4734 | else |
| 4735 | return cp; |
| 4736 | } |
| 4737 | return cp; |
| 4738 | } |
| 4739 | |
| 4740 | static int |
| 4741 | path_matches_noscheme(const char *cp) |
| 4742 | { |
| 4743 | while (*cp) { |
| 4744 | if (*cp == ':') |
| 4745 | return 0; |
| 4746 | else if (*cp == '/') |
| 4747 | return 1; |
| 4748 | ++cp; |
| 4749 | } |
| 4750 | return 1; |
| 4751 | } |
| 4752 | |
| 4753 | struct evhttp_uri * |
| 4754 | evhttp_uri_parse(const char *source_uri) |
| 4755 | { |
| 4756 | return evhttp_uri_parse_with_flags(source_uri, 0); |
| 4757 | } |
| 4758 | |
| 4759 | struct evhttp_uri * |
| 4760 | evhttp_uri_parse_with_flags(const char *source_uri, unsigned flags) |
| 4761 | { |
| 4762 | char *readbuf = NULL, *readp = NULL, *token = NULL, *query = NULL; |
| 4763 | char *path = NULL, *fragment = NULL; |
| 4764 | int got_authority = 0; |
| 4765 | |
| 4766 | struct evhttp_uri *uri = mm_calloc(1, sizeof(struct evhttp_uri)); |
| 4767 | if (uri == NULL) { |
| 4768 | event_warn("%s: calloc", __func__); |
| 4769 | goto err; |
| 4770 | } |
| 4771 | uri->port = -1; |
| 4772 | uri->flags = flags; |
| 4773 | |
| 4774 | readbuf = mm_strdup(source_uri); |
| 4775 | if (readbuf == NULL) { |
| 4776 | event_warn("%s: strdup", __func__); |
| 4777 | goto err; |
| 4778 | } |
| 4779 | |
| 4780 | readp = readbuf; |
| 4781 | token = NULL; |
| 4782 | |
| 4783 | /* We try to follow RFC3986 here as much as we can, and match |
| 4784 | the productions |
| 4785 | |
| 4786 | URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] |
| 4787 | |
| 4788 | relative-ref = relative-part [ "?" query ] [ "#" fragment ] |
| 4789 | */ |
| 4790 | |
| 4791 | /* 1. scheme: */ |
| 4792 | token = strchr(readp, ':'); |
| 4793 | if (token && scheme_ok(readp,token)) { |
| 4794 | *token = '\0'; |
| 4795 | uri->scheme = mm_strdup(readp); |
| 4796 | if (uri->scheme == NULL) { |
| 4797 | event_warn("%s: strdup", __func__); |
| 4798 | goto err; |
| 4799 | } |
| 4800 | readp = token+1; /* eat : */ |
| 4801 | } |
| 4802 | |
| 4803 | /* 2. Optionally, "//" then an 'authority' part. */ |
| 4804 | if (readp[0]=='/' && readp[1] == '/') { |
| 4805 | char *authority; |
| 4806 | readp += 2; |
| 4807 | authority = readp; |
| 4808 | path = end_of_authority(readp); |
| 4809 | if (parse_authority(uri, authority, path) < 0) |
| 4810 | goto err; |
| 4811 | readp = path; |
| 4812 | got_authority = 1; |
| 4813 | } |
| 4814 | |
| 4815 | /* 3. Query: path-abempty, path-absolute, path-rootless, or path-empty |
| 4816 | */ |
| 4817 | path = readp; |
| 4818 | readp = end_of_path(path, PART_PATH, flags); |
| 4819 | |
| 4820 | /* Query */ |
| 4821 | if (*readp == '?') { |
| 4822 | *readp = '\0'; |
| 4823 | ++readp; |
| 4824 | query = readp; |
| 4825 | readp = end_of_path(readp, PART_QUERY, flags); |
| 4826 | } |
| 4827 | /* fragment */ |
| 4828 | if (*readp == '#') { |
| 4829 | *readp = '\0'; |
| 4830 | ++readp; |
| 4831 | fragment = readp; |
| 4832 | readp = end_of_path(readp, PART_FRAGMENT, flags); |
| 4833 | } |
| 4834 | if (*readp != '\0') { |
| 4835 | goto err; |
| 4836 | } |
| 4837 | |
| 4838 | /* These next two cases may be unreachable; I'm leaving them |
| 4839 | * in to be defensive. */ |
| 4840 | /* If you didn't get an authority, the path can't begin with "//" */ |
| 4841 | if (!got_authority && path[0]=='/' && path[1]=='/') |
| 4842 | goto err; |
| 4843 | /* If you did get an authority, the path must begin with "/" or be |
| 4844 | * empty. */ |
| 4845 | if (got_authority && path[0] != '/' && path[0] != '\0') |
| 4846 | goto err; |
| 4847 | /* (End of maybe-unreachable cases) */ |
| 4848 | |
| 4849 | /* If there was no scheme, the first part of the path (if any) must |
| 4850 | * have no colon in it. */ |
| 4851 | if (! uri->scheme && !path_matches_noscheme(path)) |
| 4852 | goto err; |
| 4853 | |
| 4854 | EVUTIL_ASSERT(path); |
| 4855 | uri->path = mm_strdup(path); |
| 4856 | if (uri->path == NULL) { |
| 4857 | event_warn("%s: strdup", __func__); |
| 4858 | goto err; |
| 4859 | } |
| 4860 | |
| 4861 | if (query) { |
| 4862 | uri->query = mm_strdup(query); |
| 4863 | if (uri->query == NULL) { |
| 4864 | event_warn("%s: strdup", __func__); |
| 4865 | goto err; |
| 4866 | } |
| 4867 | } |
| 4868 | if (fragment) { |
| 4869 | uri->fragment = mm_strdup(fragment); |
| 4870 | if (uri->fragment == NULL) { |
| 4871 | event_warn("%s: strdup", __func__); |
| 4872 | goto err; |
| 4873 | } |
| 4874 | } |
| 4875 | |
| 4876 | mm_free(readbuf); |
| 4877 | |
| 4878 | return uri; |
| 4879 | err: |
| 4880 | if (uri) |
| 4881 | evhttp_uri_free(uri); |
| 4882 | if (readbuf) |
| 4883 | mm_free(readbuf); |
| 4884 | return NULL; |
| 4885 | } |
| 4886 | |
Haibo Huang | b227967 | 2019-05-31 16:12:39 -0700 | [diff] [blame] | 4887 | static struct evhttp_uri * |
| 4888 | evhttp_uri_parse_authority(char *source_uri) |
| 4889 | { |
| 4890 | struct evhttp_uri *uri = mm_calloc(1, sizeof(struct evhttp_uri)); |
| 4891 | char *end; |
| 4892 | |
| 4893 | if (uri == NULL) { |
| 4894 | event_warn("%s: calloc", __func__); |
| 4895 | goto err; |
| 4896 | } |
| 4897 | uri->port = -1; |
| 4898 | uri->flags = 0; |
| 4899 | |
| 4900 | end = end_of_authority(source_uri); |
| 4901 | if (parse_authority(uri, source_uri, end) < 0) |
| 4902 | goto err; |
| 4903 | |
| 4904 | uri->path = mm_strdup(""); |
| 4905 | if (uri->path == NULL) { |
| 4906 | event_warn("%s: strdup", __func__); |
| 4907 | goto err; |
| 4908 | } |
| 4909 | |
| 4910 | return uri; |
| 4911 | err: |
| 4912 | if (uri) |
| 4913 | evhttp_uri_free(uri); |
| 4914 | return NULL; |
| 4915 | } |
| 4916 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4917 | void |
| 4918 | evhttp_uri_free(struct evhttp_uri *uri) |
| 4919 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4920 | #define URI_FREE_STR_(f) \ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4921 | if (uri->f) { \ |
| 4922 | mm_free(uri->f); \ |
| 4923 | } |
| 4924 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4925 | URI_FREE_STR_(scheme); |
| 4926 | URI_FREE_STR_(userinfo); |
| 4927 | URI_FREE_STR_(host); |
| 4928 | URI_FREE_STR_(path); |
| 4929 | URI_FREE_STR_(query); |
| 4930 | URI_FREE_STR_(fragment); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4931 | |
| 4932 | mm_free(uri); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4933 | #undef URI_FREE_STR_ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4934 | } |
| 4935 | |
| 4936 | char * |
| 4937 | evhttp_uri_join(struct evhttp_uri *uri, char *buf, size_t limit) |
| 4938 | { |
| 4939 | struct evbuffer *tmp = 0; |
| 4940 | size_t joined_size = 0; |
| 4941 | char *output = NULL; |
| 4942 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4943 | #define URI_ADD_(f) evbuffer_add(tmp, uri->f, strlen(uri->f)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4944 | |
| 4945 | if (!uri || !buf || !limit) |
| 4946 | return NULL; |
| 4947 | |
| 4948 | tmp = evbuffer_new(); |
| 4949 | if (!tmp) |
| 4950 | return NULL; |
| 4951 | |
| 4952 | if (uri->scheme) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4953 | URI_ADD_(scheme); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4954 | evbuffer_add(tmp, ":", 1); |
| 4955 | } |
| 4956 | if (uri->host) { |
| 4957 | evbuffer_add(tmp, "//", 2); |
| 4958 | if (uri->userinfo) |
| 4959 | evbuffer_add_printf(tmp,"%s@", uri->userinfo); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4960 | URI_ADD_(host); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4961 | if (uri->port >= 0) |
| 4962 | evbuffer_add_printf(tmp,":%d", uri->port); |
| 4963 | |
| 4964 | if (uri->path && uri->path[0] != '/' && uri->path[0] != '\0') |
| 4965 | goto err; |
| 4966 | } |
| 4967 | |
| 4968 | if (uri->path) |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4969 | URI_ADD_(path); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4970 | |
| 4971 | if (uri->query) { |
| 4972 | evbuffer_add(tmp, "?", 1); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4973 | URI_ADD_(query); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4974 | } |
| 4975 | |
| 4976 | if (uri->fragment) { |
| 4977 | evbuffer_add(tmp, "#", 1); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4978 | URI_ADD_(fragment); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4979 | } |
| 4980 | |
| 4981 | evbuffer_add(tmp, "\0", 1); /* NUL */ |
| 4982 | |
| 4983 | joined_size = evbuffer_get_length(tmp); |
| 4984 | |
| 4985 | if (joined_size > limit) { |
| 4986 | /* It doesn't fit. */ |
| 4987 | evbuffer_free(tmp); |
| 4988 | return NULL; |
| 4989 | } |
| 4990 | evbuffer_remove(tmp, buf, joined_size); |
| 4991 | |
| 4992 | output = buf; |
| 4993 | err: |
| 4994 | evbuffer_free(tmp); |
| 4995 | |
| 4996 | return output; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 4997 | #undef URI_ADD_ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 4998 | } |
| 4999 | |
| 5000 | const char * |
| 5001 | evhttp_uri_get_scheme(const struct evhttp_uri *uri) |
| 5002 | { |
| 5003 | return uri->scheme; |
| 5004 | } |
| 5005 | const char * |
| 5006 | evhttp_uri_get_userinfo(const struct evhttp_uri *uri) |
| 5007 | { |
| 5008 | return uri->userinfo; |
| 5009 | } |
| 5010 | const char * |
| 5011 | evhttp_uri_get_host(const struct evhttp_uri *uri) |
| 5012 | { |
| 5013 | return uri->host; |
| 5014 | } |
| 5015 | int |
| 5016 | evhttp_uri_get_port(const struct evhttp_uri *uri) |
| 5017 | { |
| 5018 | return uri->port; |
| 5019 | } |
| 5020 | const char * |
| 5021 | evhttp_uri_get_path(const struct evhttp_uri *uri) |
| 5022 | { |
| 5023 | return uri->path; |
| 5024 | } |
| 5025 | const char * |
| 5026 | evhttp_uri_get_query(const struct evhttp_uri *uri) |
| 5027 | { |
| 5028 | return uri->query; |
| 5029 | } |
| 5030 | const char * |
| 5031 | evhttp_uri_get_fragment(const struct evhttp_uri *uri) |
| 5032 | { |
| 5033 | return uri->fragment; |
| 5034 | } |
| 5035 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5036 | #define URI_SET_STR_(f) do { \ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5037 | if (uri->f) \ |
| 5038 | mm_free(uri->f); \ |
| 5039 | if (f) { \ |
| 5040 | if ((uri->f = mm_strdup(f)) == NULL) { \ |
| 5041 | event_warn("%s: strdup()", __func__); \ |
| 5042 | return -1; \ |
| 5043 | } \ |
| 5044 | } else { \ |
| 5045 | uri->f = NULL; \ |
| 5046 | } \ |
| 5047 | } while(0) |
| 5048 | |
| 5049 | int |
| 5050 | evhttp_uri_set_scheme(struct evhttp_uri *uri, const char *scheme) |
| 5051 | { |
| 5052 | if (scheme && !scheme_ok(scheme, scheme+strlen(scheme))) |
| 5053 | return -1; |
| 5054 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5055 | URI_SET_STR_(scheme); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5056 | return 0; |
| 5057 | } |
| 5058 | int |
| 5059 | evhttp_uri_set_userinfo(struct evhttp_uri *uri, const char *userinfo) |
| 5060 | { |
| 5061 | if (userinfo && !userinfo_ok(userinfo, userinfo+strlen(userinfo))) |
| 5062 | return -1; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5063 | URI_SET_STR_(userinfo); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5064 | return 0; |
| 5065 | } |
| 5066 | int |
| 5067 | evhttp_uri_set_host(struct evhttp_uri *uri, const char *host) |
| 5068 | { |
| 5069 | if (host) { |
| 5070 | if (host[0] == '[') { |
| 5071 | if (! bracket_addr_ok(host, host+strlen(host))) |
| 5072 | return -1; |
| 5073 | } else { |
| 5074 | if (! regname_ok(host, host+strlen(host))) |
| 5075 | return -1; |
| 5076 | } |
| 5077 | } |
| 5078 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5079 | URI_SET_STR_(host); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5080 | return 0; |
| 5081 | } |
| 5082 | int |
| 5083 | evhttp_uri_set_port(struct evhttp_uri *uri, int port) |
| 5084 | { |
| 5085 | if (port < -1) |
| 5086 | return -1; |
| 5087 | uri->port = port; |
| 5088 | return 0; |
| 5089 | } |
| 5090 | #define end_of_cpath(cp,p,f) \ |
| 5091 | ((const char*)(end_of_path(((char*)(cp)), (p), (f)))) |
| 5092 | |
| 5093 | int |
| 5094 | evhttp_uri_set_path(struct evhttp_uri *uri, const char *path) |
| 5095 | { |
| 5096 | if (path && end_of_cpath(path, PART_PATH, uri->flags) != path+strlen(path)) |
| 5097 | return -1; |
| 5098 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5099 | URI_SET_STR_(path); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5100 | return 0; |
| 5101 | } |
| 5102 | int |
| 5103 | evhttp_uri_set_query(struct evhttp_uri *uri, const char *query) |
| 5104 | { |
| 5105 | if (query && end_of_cpath(query, PART_QUERY, uri->flags) != query+strlen(query)) |
| 5106 | return -1; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5107 | URI_SET_STR_(query); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5108 | return 0; |
| 5109 | } |
| 5110 | int |
| 5111 | evhttp_uri_set_fragment(struct evhttp_uri *uri, const char *fragment) |
| 5112 | { |
| 5113 | if (fragment && end_of_cpath(fragment, PART_FRAGMENT, uri->flags) != fragment+strlen(fragment)) |
| 5114 | return -1; |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 5115 | URI_SET_STR_(fragment); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 5116 | return 0; |
| 5117 | } |