Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * http_client - HTTP client |
| 3 | * Copyright (c) 2009, Jouni Malinen <j@w1.fi> |
| 4 | * |
Dmitry Shmidt | c5ec7f5 | 2012-03-06 16:33:24 -0800 | [diff] [blame] | 5 | * This software may be distributed under the terms of the BSD license. |
| 6 | * See README for more details. |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include "includes.h" |
| 10 | #include <fcntl.h> |
| 11 | |
| 12 | #include "common.h" |
| 13 | #include "eloop.h" |
| 14 | #include "httpread.h" |
| 15 | #include "http_client.h" |
| 16 | |
| 17 | |
| 18 | #define HTTP_CLIENT_TIMEOUT_SEC 30 |
| 19 | |
| 20 | |
| 21 | struct http_client { |
| 22 | struct sockaddr_in dst; |
| 23 | int sd; |
| 24 | struct wpabuf *req; |
| 25 | size_t req_pos; |
| 26 | size_t max_response; |
| 27 | |
| 28 | void (*cb)(void *ctx, struct http_client *c, |
| 29 | enum http_client_event event); |
| 30 | void *cb_ctx; |
| 31 | struct httpread *hread; |
| 32 | struct wpabuf body; |
| 33 | }; |
| 34 | |
| 35 | |
| 36 | static void http_client_timeout(void *eloop_data, void *user_ctx) |
| 37 | { |
| 38 | struct http_client *c = eloop_data; |
| 39 | wpa_printf(MSG_DEBUG, "HTTP: Timeout (c=%p)", c); |
| 40 | c->cb(c->cb_ctx, c, HTTP_CLIENT_TIMEOUT); |
| 41 | } |
| 42 | |
| 43 | |
| 44 | static void http_client_got_response(struct httpread *handle, void *cookie, |
| 45 | enum httpread_event e) |
| 46 | { |
| 47 | struct http_client *c = cookie; |
| 48 | |
| 49 | wpa_printf(MSG_DEBUG, "HTTP: httpread callback: handle=%p cookie=%p " |
| 50 | "e=%d", handle, cookie, e); |
| 51 | |
| 52 | eloop_cancel_timeout(http_client_timeout, c, NULL); |
| 53 | switch (e) { |
| 54 | case HTTPREAD_EVENT_FILE_READY: |
| 55 | if (httpread_hdr_type_get(c->hread) == HTTPREAD_HDR_TYPE_REPLY) |
| 56 | { |
| 57 | int reply_code = httpread_reply_code_get(c->hread); |
| 58 | if (reply_code == 200 /* OK */) { |
| 59 | wpa_printf(MSG_DEBUG, "HTTP: Response OK from " |
| 60 | "%s:%d", |
| 61 | inet_ntoa(c->dst.sin_addr), |
| 62 | ntohs(c->dst.sin_port)); |
| 63 | c->cb(c->cb_ctx, c, HTTP_CLIENT_OK); |
| 64 | } else { |
| 65 | wpa_printf(MSG_DEBUG, "HTTP: Error %d from " |
| 66 | "%s:%d", reply_code, |
| 67 | inet_ntoa(c->dst.sin_addr), |
| 68 | ntohs(c->dst.sin_port)); |
| 69 | c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY); |
| 70 | } |
| 71 | } else |
| 72 | c->cb(c->cb_ctx, c, HTTP_CLIENT_INVALID_REPLY); |
| 73 | break; |
| 74 | case HTTPREAD_EVENT_TIMEOUT: |
| 75 | c->cb(c->cb_ctx, c, HTTP_CLIENT_TIMEOUT); |
| 76 | break; |
| 77 | case HTTPREAD_EVENT_ERROR: |
| 78 | c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED); |
| 79 | break; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | |
| 84 | static void http_client_tx_ready(int sock, void *eloop_ctx, void *sock_ctx) |
| 85 | { |
| 86 | struct http_client *c = eloop_ctx; |
| 87 | int res; |
| 88 | |
| 89 | wpa_printf(MSG_DEBUG, "HTTP: Send client request to %s:%d (%lu of %lu " |
| 90 | "bytes remaining)", |
| 91 | inet_ntoa(c->dst.sin_addr), ntohs(c->dst.sin_port), |
| 92 | (unsigned long) wpabuf_len(c->req), |
| 93 | (unsigned long) wpabuf_len(c->req) - c->req_pos); |
| 94 | |
Dmitry Shmidt | 51b6ea8 | 2013-05-08 10:42:09 -0700 | [diff] [blame^] | 95 | res = send(c->sd, wpabuf_head_u8(c->req) + c->req_pos, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 96 | wpabuf_len(c->req) - c->req_pos, 0); |
| 97 | if (res < 0) { |
| 98 | wpa_printf(MSG_DEBUG, "HTTP: Failed to send buffer: %s", |
| 99 | strerror(errno)); |
| 100 | eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE); |
| 101 | c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED); |
| 102 | return; |
| 103 | } |
| 104 | |
| 105 | if ((size_t) res < wpabuf_len(c->req) - c->req_pos) { |
| 106 | wpa_printf(MSG_DEBUG, "HTTP: Sent %d of %lu bytes; %lu bytes " |
| 107 | "remaining", |
| 108 | res, (unsigned long) wpabuf_len(c->req), |
| 109 | (unsigned long) wpabuf_len(c->req) - c->req_pos - |
| 110 | res); |
| 111 | c->req_pos += res; |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | wpa_printf(MSG_DEBUG, "HTTP: Full client request sent to %s:%d", |
| 116 | inet_ntoa(c->dst.sin_addr), ntohs(c->dst.sin_port)); |
| 117 | eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE); |
| 118 | wpabuf_free(c->req); |
| 119 | c->req = NULL; |
| 120 | |
| 121 | c->hread = httpread_create(c->sd, http_client_got_response, c, |
| 122 | c->max_response, HTTP_CLIENT_TIMEOUT_SEC); |
| 123 | if (c->hread == NULL) { |
| 124 | c->cb(c->cb_ctx, c, HTTP_CLIENT_FAILED); |
| 125 | return; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | |
| 130 | struct http_client * http_client_addr(struct sockaddr_in *dst, |
| 131 | struct wpabuf *req, size_t max_response, |
| 132 | void (*cb)(void *ctx, |
| 133 | struct http_client *c, |
| 134 | enum http_client_event event), |
| 135 | void *cb_ctx) |
| 136 | { |
| 137 | struct http_client *c; |
| 138 | |
| 139 | c = os_zalloc(sizeof(*c)); |
| 140 | if (c == NULL) |
| 141 | return NULL; |
| 142 | c->sd = -1; |
| 143 | c->dst = *dst; |
| 144 | c->max_response = max_response; |
| 145 | c->cb = cb; |
| 146 | c->cb_ctx = cb_ctx; |
| 147 | |
| 148 | c->sd = socket(AF_INET, SOCK_STREAM, 0); |
| 149 | if (c->sd < 0) { |
| 150 | http_client_free(c); |
| 151 | return NULL; |
| 152 | } |
| 153 | |
| 154 | if (fcntl(c->sd, F_SETFL, O_NONBLOCK) != 0) { |
| 155 | wpa_printf(MSG_DEBUG, "HTTP: fnctl(O_NONBLOCK) failed: %s", |
| 156 | strerror(errno)); |
| 157 | http_client_free(c); |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | if (connect(c->sd, (struct sockaddr *) dst, sizeof(*dst))) { |
| 162 | if (errno != EINPROGRESS) { |
| 163 | wpa_printf(MSG_DEBUG, "HTTP: Failed to connect: %s", |
| 164 | strerror(errno)); |
| 165 | http_client_free(c); |
| 166 | return NULL; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Continue connecting in the background; eloop will call us |
| 171 | * once the connection is ready (or failed). |
| 172 | */ |
| 173 | } |
| 174 | |
| 175 | if (eloop_register_sock(c->sd, EVENT_TYPE_WRITE, http_client_tx_ready, |
| 176 | c, NULL)) { |
| 177 | http_client_free(c); |
| 178 | return NULL; |
| 179 | } |
| 180 | |
| 181 | if (eloop_register_timeout(HTTP_CLIENT_TIMEOUT_SEC, 0, |
| 182 | http_client_timeout, c, NULL)) { |
| 183 | http_client_free(c); |
| 184 | return NULL; |
| 185 | } |
| 186 | |
| 187 | c->req = req; |
| 188 | |
| 189 | return c; |
| 190 | } |
| 191 | |
| 192 | |
| 193 | char * http_client_url_parse(const char *url, struct sockaddr_in *dst, |
| 194 | char **ret_path) |
| 195 | { |
| 196 | char *u, *addr, *port, *path; |
| 197 | |
| 198 | u = os_strdup(url); |
| 199 | if (u == NULL) |
| 200 | return NULL; |
| 201 | |
| 202 | os_memset(dst, 0, sizeof(*dst)); |
| 203 | dst->sin_family = AF_INET; |
| 204 | addr = u + 7; |
| 205 | path = os_strchr(addr, '/'); |
| 206 | port = os_strchr(addr, ':'); |
| 207 | if (path == NULL) { |
| 208 | path = "/"; |
| 209 | } else { |
| 210 | *path = '\0'; /* temporary nul termination for address */ |
| 211 | if (port > path) |
| 212 | port = NULL; |
| 213 | } |
| 214 | if (port) |
| 215 | *port++ = '\0'; |
| 216 | |
| 217 | if (inet_aton(addr, &dst->sin_addr) == 0) { |
| 218 | /* TODO: name lookup */ |
| 219 | wpa_printf(MSG_DEBUG, "HTTP: Unsupported address in URL '%s' " |
| 220 | "(addr='%s' port='%s')", |
| 221 | url, addr, port); |
| 222 | os_free(u); |
| 223 | return NULL; |
| 224 | } |
| 225 | |
| 226 | if (port) |
| 227 | dst->sin_port = htons(atoi(port)); |
| 228 | else |
| 229 | dst->sin_port = htons(80); |
| 230 | |
| 231 | if (*path == '\0') { |
| 232 | /* remove temporary nul termination for address */ |
| 233 | *path = '/'; |
| 234 | } |
| 235 | |
| 236 | *ret_path = path; |
| 237 | |
| 238 | return u; |
| 239 | } |
| 240 | |
| 241 | |
| 242 | struct http_client * http_client_url(const char *url, |
| 243 | struct wpabuf *req, size_t max_response, |
| 244 | void (*cb)(void *ctx, |
| 245 | struct http_client *c, |
| 246 | enum http_client_event event), |
| 247 | void *cb_ctx) |
| 248 | { |
| 249 | struct sockaddr_in dst; |
| 250 | struct http_client *c; |
| 251 | char *u, *path; |
| 252 | struct wpabuf *req_buf = NULL; |
| 253 | |
| 254 | if (os_strncmp(url, "http://", 7) != 0) |
| 255 | return NULL; |
| 256 | u = http_client_url_parse(url, &dst, &path); |
| 257 | if (u == NULL) |
| 258 | return NULL; |
| 259 | |
| 260 | if (req == NULL) { |
| 261 | req_buf = wpabuf_alloc(os_strlen(url) + 1000); |
| 262 | if (req_buf == NULL) { |
| 263 | os_free(u); |
| 264 | return NULL; |
| 265 | } |
| 266 | req = req_buf; |
| 267 | wpabuf_printf(req, |
| 268 | "GET %s HTTP/1.1\r\n" |
| 269 | "Cache-Control: no-cache\r\n" |
| 270 | "Pragma: no-cache\r\n" |
| 271 | "Accept: text/xml, application/xml\r\n" |
| 272 | "User-Agent: wpa_supplicant\r\n" |
| 273 | "Host: %s:%d\r\n" |
| 274 | "\r\n", |
| 275 | path, inet_ntoa(dst.sin_addr), |
| 276 | ntohs(dst.sin_port)); |
| 277 | } |
| 278 | os_free(u); |
| 279 | |
| 280 | c = http_client_addr(&dst, req, max_response, cb, cb_ctx); |
| 281 | if (c == NULL) { |
| 282 | wpabuf_free(req_buf); |
| 283 | return NULL; |
| 284 | } |
| 285 | |
| 286 | return c; |
| 287 | } |
| 288 | |
| 289 | |
| 290 | void http_client_free(struct http_client *c) |
| 291 | { |
| 292 | if (c == NULL) |
| 293 | return; |
| 294 | httpread_destroy(c->hread); |
| 295 | wpabuf_free(c->req); |
| 296 | if (c->sd >= 0) { |
| 297 | eloop_unregister_sock(c->sd, EVENT_TYPE_WRITE); |
| 298 | close(c->sd); |
| 299 | } |
| 300 | eloop_cancel_timeout(http_client_timeout, c, NULL); |
| 301 | os_free(c); |
| 302 | } |
| 303 | |
| 304 | |
| 305 | struct wpabuf * http_client_get_body(struct http_client *c) |
| 306 | { |
| 307 | if (c->hread == NULL) |
| 308 | return NULL; |
| 309 | wpabuf_set(&c->body, httpread_data_get(c->hread), |
| 310 | httpread_length_get(c->hread)); |
| 311 | return &c->body; |
| 312 | } |
| 313 | |
| 314 | |
| 315 | char * http_client_get_hdr_line(struct http_client *c, const char *tag) |
| 316 | { |
| 317 | if (c->hread == NULL) |
| 318 | return NULL; |
| 319 | return httpread_hdr_line_get(c->hread, tag); |
| 320 | } |
| 321 | |
| 322 | |
| 323 | char * http_link_update(char *url, const char *base) |
| 324 | { |
| 325 | char *n; |
| 326 | size_t len; |
| 327 | const char *pos; |
| 328 | |
| 329 | /* RFC 2396, Chapter 5.2 */ |
| 330 | /* TODO: consider adding all cases described in RFC 2396 */ |
| 331 | |
| 332 | if (url == NULL) |
| 333 | return NULL; |
| 334 | |
| 335 | if (os_strncmp(url, "http://", 7) == 0) |
| 336 | return url; /* absolute link */ |
| 337 | |
| 338 | if (os_strncmp(base, "http://", 7) != 0) |
| 339 | return url; /* unable to handle base URL */ |
| 340 | |
| 341 | len = os_strlen(url) + 1 + os_strlen(base) + 1; |
| 342 | n = os_malloc(len); |
| 343 | if (n == NULL) |
| 344 | return url; /* failed */ |
| 345 | |
| 346 | if (url[0] == '/') { |
| 347 | pos = os_strchr(base + 7, '/'); |
| 348 | if (pos == NULL) { |
| 349 | os_snprintf(n, len, "%s%s", base, url); |
| 350 | } else { |
| 351 | os_memcpy(n, base, pos - base); |
| 352 | os_memcpy(n + (pos - base), url, os_strlen(url) + 1); |
| 353 | } |
| 354 | } else { |
| 355 | pos = os_strrchr(base + 7, '/'); |
| 356 | if (pos == NULL) { |
| 357 | os_snprintf(n, len, "%s/%s", base, url); |
| 358 | } else { |
| 359 | os_memcpy(n, base, pos - base + 1); |
| 360 | os_memcpy(n + (pos - base) + 1, url, os_strlen(url) + |
| 361 | 1); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | os_free(url); |
| 366 | |
| 367 | return n; |
| 368 | } |