The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 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. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the Computer Systems |
| 16 | * Engineering Group at Lawrence Berkeley Laboratory. |
| 17 | * 4. Neither the name of the University nor of the Laboratory may be used |
| 18 | * to endorse or promote products derived from this software without |
| 19 | * specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | static const char rcsid[] _U_ = |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 36 | "@(#) $Header: /tcpdump/master/libpcap/pcap.c,v 1.128 2008-12-23 20:13:29 guy Exp $ (LBL)"; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 37 | #endif |
| 38 | |
| 39 | #ifdef HAVE_CONFIG_H |
| 40 | #include "config.h" |
| 41 | #endif |
| 42 | |
| 43 | #ifdef WIN32 |
| 44 | #include <pcap-stdinc.h> |
| 45 | #else /* WIN32 */ |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 46 | #if HAVE_INTTYPES_H |
| 47 | #include <inttypes.h> |
| 48 | #elif HAVE_STDINT_H |
| 49 | #include <stdint.h> |
| 50 | #endif |
| 51 | #ifdef HAVE_SYS_BITYPES_H |
| 52 | #include <sys/bitypes.h> |
| 53 | #endif |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 54 | #include <sys/types.h> |
| 55 | #endif /* WIN32 */ |
| 56 | |
| 57 | #include <stdio.h> |
| 58 | #include <stdlib.h> |
| 59 | #include <string.h> |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 60 | #if !defined(_MSC_VER) && !defined(__BORLANDC__) && !defined(__MINGW32__) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 61 | #include <unistd.h> |
| 62 | #endif |
| 63 | #include <fcntl.h> |
| 64 | #include <errno.h> |
| 65 | |
| 66 | #ifdef HAVE_OS_PROTO_H |
| 67 | #include "os-proto.h" |
| 68 | #endif |
| 69 | |
| 70 | #ifdef MSDOS |
| 71 | #include "pcap-dos.h" |
| 72 | #endif |
| 73 | |
| 74 | #include "pcap-int.h" |
| 75 | |
| 76 | #ifdef HAVE_DAG_API |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 77 | #include "pcap-dag.h" |
| 78 | #endif /* HAVE_DAG_API */ |
| 79 | |
| 80 | #ifdef HAVE_SEPTEL_API |
| 81 | #include "pcap-septel.h" |
| 82 | #endif /* HAVE_SEPTEL_API */ |
| 83 | |
| 84 | #ifdef HAVE_SNF_API |
| 85 | #include "pcap-snf.h" |
| 86 | #endif /* HAVE_SNF_API */ |
| 87 | |
| 88 | #ifdef PCAP_SUPPORT_USB |
| 89 | #include "pcap-usb-linux.h" |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 90 | #endif |
| 91 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 92 | #ifdef PCAP_SUPPORT_BT |
| 93 | #include "pcap-bt-linux.h" |
| 94 | #endif |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 95 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 96 | #ifdef PCAP_SUPPORT_CAN |
| 97 | #include "pcap-can-linux.h" |
| 98 | #endif |
| 99 | |
| 100 | #ifdef PCAP_SUPPORT_CANUSB |
| 101 | #include "pcap-canusb-linux.h" |
| 102 | #endif |
| 103 | |
| 104 | #ifdef PCAP_SUPPORT_NETFILTER |
| 105 | #include "pcap-netfilter-linux.h" |
| 106 | #endif |
| 107 | |
| 108 | #ifdef PCAP_SUPPORT_DBUS |
| 109 | #include "pcap-dbus.h" |
| 110 | #endif |
| 111 | |
| 112 | int |
| 113 | pcap_not_initialized(pcap_t *pcap _U_) |
| 114 | { |
| 115 | /* this means 'not initialized' */ |
| 116 | return (PCAP_ERROR_NOT_ACTIVATED); |
| 117 | } |
| 118 | |
| 119 | #ifdef WIN32 |
| 120 | Adapter * |
| 121 | pcap_no_adapter(pcap_t *pcap _U_) |
| 122 | { |
| 123 | return (NULL); |
| 124 | } |
| 125 | #endif |
| 126 | |
| 127 | /* |
| 128 | * Returns 1 if rfmon mode can be set on the pcap_t, 0 if it can't, |
| 129 | * a PCAP_ERROR value on an error. |
| 130 | */ |
| 131 | int |
| 132 | pcap_can_set_rfmon(pcap_t *p) |
| 133 | { |
| 134 | return (p->can_set_rfmon_op(p)); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | /* |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 138 | * For systems where rfmon mode is never supported. |
| 139 | */ |
| 140 | static int |
| 141 | pcap_cant_set_rfmon(pcap_t *p _U_) |
| 142 | { |
| 143 | return (0); |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Sets *tstamp_typesp to point to an array 1 or more supported time stamp |
| 148 | * types; the return value is the number of supported time stamp types. |
| 149 | * The list should be freed by a call to pcap_free_tstamp_types() when |
| 150 | * you're done with it. |
| 151 | * |
| 152 | * A return value of 0 means "you don't get a choice of time stamp type", |
| 153 | * in which case *tstamp_typesp is set to null. |
| 154 | * |
| 155 | * PCAP_ERROR is returned on error. |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 156 | */ |
| 157 | int |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 158 | pcap_list_tstamp_types(pcap_t *p, int **tstamp_typesp) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 159 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 160 | if (p->tstamp_type_count == 0) { |
| 161 | /* |
| 162 | * We don't support multiple time stamp types. |
| 163 | */ |
| 164 | *tstamp_typesp = NULL; |
| 165 | } else { |
| 166 | *tstamp_typesp = (int*)calloc(sizeof(**tstamp_typesp), |
| 167 | p->tstamp_type_count); |
| 168 | if (*tstamp_typesp == NULL) { |
| 169 | (void)snprintf(p->errbuf, sizeof(p->errbuf), |
| 170 | "malloc: %s", pcap_strerror(errno)); |
| 171 | return (PCAP_ERROR); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 172 | } |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 173 | (void)memcpy(*tstamp_typesp, p->tstamp_type_list, |
| 174 | sizeof(**tstamp_typesp) * p->tstamp_type_count); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 175 | } |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 176 | return (p->tstamp_type_count); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 177 | } |
| 178 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 179 | /* |
| 180 | * In Windows, you might have a library built with one version of the |
| 181 | * C runtime library and an application built with another version of |
| 182 | * the C runtime library, which means that the library might use one |
| 183 | * version of malloc() and free() and the application might use another |
| 184 | * version of malloc() and free(). If so, that means something |
| 185 | * allocated by the library cannot be freed by the application, so we |
| 186 | * need to have a pcap_free_tstamp_types() routine to free up the list |
| 187 | * allocated by pcap_list_tstamp_types(), even though it's just a wrapper |
| 188 | * around free(). |
| 189 | */ |
| 190 | void |
| 191 | pcap_free_tstamp_types(int *tstamp_type_list) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 192 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 193 | free(tstamp_type_list); |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * Default one-shot callback; overridden for capture types where the |
| 198 | * packet data cannot be guaranteed to be available after the callback |
| 199 | * returns, so that a copy must be made. |
| 200 | */ |
| 201 | void |
| 202 | pcap_oneshot(u_char *user, const struct pcap_pkthdr *h, const u_char *pkt) |
| 203 | { |
| 204 | struct oneshot_userdata *sp = (struct oneshot_userdata *)user; |
| 205 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 206 | *sp->hdr = *h; |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 207 | *sp->pkt = pkt; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | const u_char * |
| 211 | pcap_next(pcap_t *p, struct pcap_pkthdr *h) |
| 212 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 213 | struct oneshot_userdata s; |
| 214 | const u_char *pkt; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 215 | |
| 216 | s.hdr = h; |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 217 | s.pkt = &pkt; |
| 218 | s.pd = p; |
| 219 | if (pcap_dispatch(p, 1, p->oneshot_callback, (u_char *)&s) <= 0) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 220 | return (0); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 221 | return (pkt); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | int |
| 225 | pcap_next_ex(pcap_t *p, struct pcap_pkthdr **pkt_header, |
| 226 | const u_char **pkt_data) |
| 227 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 228 | struct oneshot_userdata s; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 229 | |
| 230 | s.hdr = &p->pcap_header; |
| 231 | s.pkt = pkt_data; |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 232 | s.pd = p; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 233 | |
| 234 | /* Saves a pointer to the packet headers */ |
| 235 | *pkt_header= &p->pcap_header; |
| 236 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 237 | if (p->rfile != NULL) { |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 238 | int status; |
| 239 | |
| 240 | /* We are on an offline capture */ |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 241 | status = pcap_offline_read(p, 1, p->oneshot_callback, |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 242 | (u_char *)&s); |
| 243 | |
| 244 | /* |
| 245 | * Return codes for pcap_offline_read() are: |
| 246 | * - 0: EOF |
| 247 | * - -1: error |
| 248 | * - >1: OK |
| 249 | * The first one ('0') conflicts with the return code of |
| 250 | * 0 from pcap_read() meaning "no packets arrived before |
| 251 | * the timeout expired", so we map it to -2 so you can |
| 252 | * distinguish between an EOF from a savefile and a |
| 253 | * "no packets arrived before the timeout expired, try |
| 254 | * again" from a live capture. |
| 255 | */ |
| 256 | if (status == 0) |
| 257 | return (-2); |
| 258 | else |
| 259 | return (status); |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * Return codes for pcap_read() are: |
| 264 | * - 0: timeout |
| 265 | * - -1: error |
| 266 | * - -2: loop was broken out of with pcap_breakloop() |
| 267 | * - >1: OK |
| 268 | * The first one ('0') conflicts with the return code of 0 from |
| 269 | * pcap_offline_read() meaning "end of file". |
| 270 | */ |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 271 | return (p->read_op(p, 1, p->oneshot_callback, (u_char *)&s)); |
| 272 | } |
| 273 | |
| 274 | #if defined(DAG_ONLY) |
| 275 | int |
| 276 | pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf) |
| 277 | { |
| 278 | return (dag_findalldevs(alldevsp, errbuf)); |
| 279 | } |
| 280 | |
| 281 | pcap_t * |
| 282 | pcap_create(const char *source, char *errbuf) |
| 283 | { |
| 284 | return (dag_create(source, errbuf)); |
| 285 | } |
| 286 | #elif defined(SEPTEL_ONLY) |
| 287 | int |
| 288 | pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf) |
| 289 | { |
| 290 | return (septel_findalldevs(alldevsp, errbuf)); |
| 291 | } |
| 292 | |
| 293 | pcap_t * |
| 294 | pcap_create(const char *source, char *errbuf) |
| 295 | { |
| 296 | return (septel_create(source, errbuf)); |
| 297 | } |
| 298 | #elif defined(SNF_ONLY) |
| 299 | int |
| 300 | pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf) |
| 301 | { |
| 302 | return (snf_findalldevs(alldevsp, errbuf)); |
| 303 | } |
| 304 | |
| 305 | pcap_t * |
| 306 | pcap_create(const char *source, char *errbuf) |
| 307 | { |
| 308 | return (snf_create(source, errbuf)); |
| 309 | } |
| 310 | #else /* regular pcap */ |
| 311 | struct capture_source_type { |
| 312 | int (*findalldevs_op)(pcap_if_t **, char *); |
| 313 | pcap_t *(*create_op)(const char *, char *, int *); |
| 314 | } capture_source_types[] = { |
| 315 | #ifdef HAVE_DAG_API |
| 316 | { dag_findalldevs, dag_create }, |
| 317 | #endif |
| 318 | #ifdef HAVE_SEPTEL_API |
| 319 | { septel_findalldevs, septel_create }, |
| 320 | #endif |
| 321 | #ifdef HAVE_SNF_API |
| 322 | { snf_findalldevs, snf_create }, |
| 323 | #endif |
| 324 | #ifdef PCAP_SUPPORT_BT |
| 325 | { bt_findalldevs, bt_create }, |
| 326 | #endif |
| 327 | #if PCAP_SUPPORT_CANUSB |
| 328 | { canusb_findalldevs, canusb_create }, |
| 329 | #endif |
| 330 | #ifdef PCAP_SUPPORT_CAN |
| 331 | { can_findalldevs, can_create }, |
| 332 | #endif |
| 333 | #ifdef PCAP_SUPPORT_USB |
| 334 | { usb_findalldevs, usb_create }, |
| 335 | #endif |
| 336 | #ifdef PCAP_SUPPORT_NETFILTER |
| 337 | { netfilter_findalldevs, netfilter_create }, |
| 338 | #endif |
| 339 | #ifdef PCAP_SUPPORT_DBUS |
| 340 | { dbus_findalldevs, dbus_create }, |
| 341 | #endif |
| 342 | { NULL, NULL } |
| 343 | }; |
| 344 | |
| 345 | /* |
| 346 | * Get a list of all capture sources that are up and that we can open. |
| 347 | * Returns -1 on error, 0 otherwise. |
| 348 | * The list, as returned through "alldevsp", may be null if no interfaces |
| 349 | * were up and could be opened. |
| 350 | */ |
| 351 | int |
| 352 | pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf) |
| 353 | { |
| 354 | size_t i; |
| 355 | |
| 356 | /* |
| 357 | * Get the list of regular interfaces first. |
| 358 | */ |
| 359 | if (pcap_findalldevs_interfaces(alldevsp, errbuf) == -1) |
| 360 | return (-1); /* failure */ |
| 361 | |
| 362 | /* |
| 363 | * Add any interfaces that need a platform-specific mechanism |
| 364 | * to find. |
| 365 | */ |
| 366 | if (pcap_platform_finddevs(alldevsp, errbuf) == -1) { |
| 367 | /* |
| 368 | * We had an error; free the list we've been |
| 369 | * constructing. |
| 370 | */ |
| 371 | if (*alldevsp != NULL) { |
| 372 | pcap_freealldevs(*alldevsp); |
| 373 | *alldevsp = NULL; |
| 374 | } |
| 375 | return (-1); |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Ask each of the non-local-network-interface capture |
| 380 | * source types what interfaces they have. |
| 381 | */ |
| 382 | for (i = 0; capture_source_types[i].findalldevs_op != NULL; i++) { |
| 383 | if (capture_source_types[i].findalldevs_op(alldevsp, errbuf) == -1) { |
| 384 | /* |
| 385 | * We had an error; free the list we've been |
| 386 | * constructing. |
| 387 | */ |
| 388 | if (*alldevsp != NULL) { |
| 389 | pcap_freealldevs(*alldevsp); |
| 390 | *alldevsp = NULL; |
| 391 | } |
| 392 | return (-1); |
| 393 | } |
| 394 | } |
| 395 | return (0); |
| 396 | } |
| 397 | |
| 398 | pcap_t * |
| 399 | pcap_create(const char *source, char *errbuf) |
| 400 | { |
| 401 | size_t i; |
| 402 | int is_theirs; |
| 403 | pcap_t *p; |
| 404 | |
| 405 | /* |
| 406 | * A null source name is equivalent to the "any" device - |
| 407 | * which might not be supported on this platform, but |
| 408 | * this means that you'll get a "not supported" error |
| 409 | * rather than, say, a crash when we try to dereference |
| 410 | * the null pointer. |
| 411 | */ |
| 412 | if (source == NULL) |
| 413 | source = "any"; |
| 414 | |
| 415 | /* |
| 416 | * Try each of the non-local-network-interface capture |
| 417 | * source types until we find one that works for this |
| 418 | * device or run out of types. |
| 419 | */ |
| 420 | for (i = 0; capture_source_types[i].create_op != NULL; i++) { |
| 421 | is_theirs = 0; |
| 422 | p = capture_source_types[i].create_op(source, errbuf, &is_theirs); |
| 423 | if (is_theirs) { |
| 424 | /* |
| 425 | * The device name refers to a device of the |
| 426 | * type in question; either it succeeded, |
| 427 | * in which case p refers to a pcap_t to |
| 428 | * later activate for the device, or it |
| 429 | * failed, in which case p is null and we |
| 430 | * should return that to report the failure |
| 431 | * to create. |
| 432 | */ |
| 433 | return (p); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * OK, try it as a regular network interface. |
| 439 | */ |
| 440 | return (pcap_create_interface(source, errbuf)); |
| 441 | } |
| 442 | #endif |
| 443 | |
| 444 | static void |
| 445 | initialize_ops(pcap_t *p) |
| 446 | { |
| 447 | /* |
| 448 | * Set operation pointers for operations that only work on |
| 449 | * an activated pcap_t to point to a routine that returns |
| 450 | * a "this isn't activated" error. |
| 451 | */ |
| 452 | p->read_op = (read_op_t)pcap_not_initialized; |
| 453 | p->inject_op = (inject_op_t)pcap_not_initialized; |
| 454 | p->setfilter_op = (setfilter_op_t)pcap_not_initialized; |
| 455 | p->setdirection_op = (setdirection_op_t)pcap_not_initialized; |
| 456 | p->set_datalink_op = (set_datalink_op_t)pcap_not_initialized; |
| 457 | p->getnonblock_op = (getnonblock_op_t)pcap_not_initialized; |
| 458 | p->setnonblock_op = (setnonblock_op_t)pcap_not_initialized; |
| 459 | p->stats_op = (stats_op_t)pcap_not_initialized; |
| 460 | #ifdef WIN32 |
| 461 | p->setbuff_op = (setbuff_op_t)pcap_not_initialized; |
| 462 | p->setmode_op = (setmode_op_t)pcap_not_initialized; |
| 463 | p->setmintocopy_op = (setmintocopy_op_t)pcap_not_initialized; |
| 464 | p->getadapter_op = pcap_no_adapter; |
| 465 | #endif |
| 466 | |
| 467 | /* |
| 468 | * Default cleanup operation - implementations can override |
| 469 | * this, but should call pcap_cleanup_live_common() after |
| 470 | * doing their own additional cleanup. |
| 471 | */ |
| 472 | p->cleanup_op = pcap_cleanup_live_common; |
| 473 | |
| 474 | /* |
| 475 | * In most cases, the standard one-shot callback can |
| 476 | * be used for pcap_next()/pcap_next_ex(). |
| 477 | */ |
| 478 | p->oneshot_callback = pcap_oneshot; |
| 479 | } |
| 480 | |
| 481 | static pcap_t * |
| 482 | pcap_alloc_pcap_t(char *ebuf, size_t size) |
| 483 | { |
| 484 | char *chunk; |
| 485 | pcap_t *p; |
| 486 | |
| 487 | /* |
| 488 | * Allocate a chunk of memory big enough for a pcap_t |
| 489 | * plus a structure following it of size "size". The |
| 490 | * structure following it is a private data structure |
| 491 | * for the routines that handle this pcap_t. |
| 492 | */ |
| 493 | chunk = malloc(sizeof (pcap_t) + size); |
| 494 | if (chunk == NULL) { |
| 495 | snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", |
| 496 | pcap_strerror(errno)); |
| 497 | return (NULL); |
| 498 | } |
| 499 | memset(chunk, 0, sizeof (pcap_t) + size); |
| 500 | |
| 501 | /* |
| 502 | * Get a pointer to the pcap_t at the beginning. |
| 503 | */ |
| 504 | p = (pcap_t *)chunk; |
| 505 | |
| 506 | #ifndef WIN32 |
| 507 | p->fd = -1; /* not opened yet */ |
| 508 | p->selectable_fd = -1; |
| 509 | #endif |
| 510 | |
| 511 | if (size == 0) { |
| 512 | /* No private data was requested. */ |
| 513 | p->priv = NULL; |
| 514 | } else { |
| 515 | /* |
| 516 | * Set the pointer to the private data; that's the structure |
| 517 | * of size "size" following the pcap_t. |
| 518 | */ |
| 519 | p->priv = (void *)(chunk + sizeof (pcap_t)); |
| 520 | } |
| 521 | |
| 522 | return (p); |
| 523 | } |
| 524 | |
| 525 | pcap_t * |
| 526 | pcap_create_common(const char *source, char *ebuf, size_t size) |
| 527 | { |
| 528 | pcap_t *p; |
| 529 | |
| 530 | p = pcap_alloc_pcap_t(ebuf, size); |
| 531 | if (p == NULL) |
| 532 | return (NULL); |
| 533 | |
| 534 | p->opt.source = strdup(source); |
| 535 | if (p->opt.source == NULL) { |
| 536 | snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", |
| 537 | pcap_strerror(errno)); |
| 538 | free(p); |
| 539 | return (NULL); |
| 540 | } |
| 541 | |
| 542 | /* |
| 543 | * Default to "can't set rfmon mode"; if it's supported by |
| 544 | * a platform, the create routine that called us can set |
| 545 | * the op to its routine to check whether a particular |
| 546 | * device supports it. |
| 547 | */ |
| 548 | p->can_set_rfmon_op = pcap_cant_set_rfmon; |
| 549 | |
| 550 | initialize_ops(p); |
| 551 | |
| 552 | /* put in some defaults*/ |
| 553 | pcap_set_snaplen(p, 65535); /* max packet size */ |
| 554 | p->opt.timeout = 0; /* no timeout specified */ |
| 555 | p->opt.buffer_size = 0; /* use the platform's default */ |
| 556 | p->opt.promisc = 0; |
| 557 | p->opt.rfmon = 0; |
| 558 | p->opt.immediate = 0; |
| 559 | p->opt.tstamp_type = -1; /* default to not setting time stamp type */ |
| 560 | p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO; |
| 561 | return (p); |
| 562 | } |
| 563 | |
| 564 | int |
| 565 | pcap_check_activated(pcap_t *p) |
| 566 | { |
| 567 | if (p->activated) { |
| 568 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "can't perform " |
| 569 | " operation on activated capture"); |
| 570 | return (-1); |
| 571 | } |
| 572 | return (0); |
| 573 | } |
| 574 | |
| 575 | int |
| 576 | pcap_set_snaplen(pcap_t *p, int snaplen) |
| 577 | { |
| 578 | if (pcap_check_activated(p)) |
| 579 | return (PCAP_ERROR_ACTIVATED); |
| 580 | p->snapshot = snaplen; |
| 581 | return (0); |
| 582 | } |
| 583 | |
| 584 | int |
| 585 | pcap_set_promisc(pcap_t *p, int promisc) |
| 586 | { |
| 587 | if (pcap_check_activated(p)) |
| 588 | return (PCAP_ERROR_ACTIVATED); |
| 589 | p->opt.promisc = promisc; |
| 590 | return (0); |
| 591 | } |
| 592 | |
| 593 | int |
| 594 | pcap_set_rfmon(pcap_t *p, int rfmon) |
| 595 | { |
| 596 | if (pcap_check_activated(p)) |
| 597 | return (PCAP_ERROR_ACTIVATED); |
| 598 | p->opt.rfmon = rfmon; |
| 599 | return (0); |
| 600 | } |
| 601 | |
| 602 | int |
| 603 | pcap_set_timeout(pcap_t *p, int timeout_ms) |
| 604 | { |
| 605 | if (pcap_check_activated(p)) |
| 606 | return (PCAP_ERROR_ACTIVATED); |
| 607 | p->opt.timeout = timeout_ms; |
| 608 | return (0); |
| 609 | } |
| 610 | |
| 611 | int |
| 612 | pcap_set_tstamp_type(pcap_t *p, int tstamp_type) |
| 613 | { |
| 614 | int i; |
| 615 | |
| 616 | if (pcap_check_activated(p)) |
| 617 | return (PCAP_ERROR_ACTIVATED); |
| 618 | |
| 619 | /* |
| 620 | * If p->tstamp_type_count is 0, we only support PCAP_TSTAMP_HOST; |
| 621 | * the default time stamp type is PCAP_TSTAMP_HOST. |
| 622 | */ |
| 623 | if (p->tstamp_type_count == 0) { |
| 624 | if (tstamp_type == PCAP_TSTAMP_HOST) { |
| 625 | p->opt.tstamp_type = tstamp_type; |
| 626 | return (0); |
| 627 | } |
| 628 | } else { |
| 629 | /* |
| 630 | * Check whether we claim to support this type of time stamp. |
| 631 | */ |
| 632 | for (i = 0; i < p->tstamp_type_count; i++) { |
| 633 | if (p->tstamp_type_list[i] == tstamp_type) { |
| 634 | /* |
| 635 | * Yes. |
| 636 | */ |
| 637 | p->opt.tstamp_type = tstamp_type; |
| 638 | return (0); |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | * We don't support this type of time stamp. |
| 645 | */ |
| 646 | return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP); |
| 647 | } |
| 648 | |
| 649 | int |
| 650 | pcap_set_immediate_mode(pcap_t *p, int immediate) |
| 651 | { |
| 652 | if (pcap_check_activated(p)) |
| 653 | return (PCAP_ERROR_ACTIVATED); |
| 654 | p->opt.immediate = immediate; |
| 655 | return (0); |
| 656 | } |
| 657 | |
| 658 | int |
| 659 | pcap_set_buffer_size(pcap_t *p, int buffer_size) |
| 660 | { |
| 661 | if (pcap_check_activated(p)) |
| 662 | return (PCAP_ERROR_ACTIVATED); |
| 663 | p->opt.buffer_size = buffer_size; |
| 664 | return (0); |
| 665 | } |
| 666 | |
| 667 | int |
| 668 | pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision) |
| 669 | { |
| 670 | int i; |
| 671 | |
| 672 | if (pcap_check_activated(p)) |
| 673 | return (PCAP_ERROR_ACTIVATED); |
| 674 | |
| 675 | /* |
| 676 | * If p->tstamp_precision_count is 0, we only support setting |
| 677 | * the time stamp precision to microsecond precision; every |
| 678 | * pcap module *MUST* support microsecond precision, even if |
| 679 | * it does so by converting the native precision to |
| 680 | * microseconds. |
| 681 | */ |
| 682 | if (p->tstamp_precision_count == 0) { |
| 683 | if (tstamp_precision == PCAP_TSTAMP_PRECISION_MICRO) { |
| 684 | p->opt.tstamp_precision = tstamp_precision; |
| 685 | return (0); |
| 686 | } |
| 687 | } else { |
| 688 | /* |
| 689 | * Check whether we claim to support this precision of |
| 690 | * time stamp. |
| 691 | */ |
| 692 | for (i = 0; i < p->tstamp_precision_count; i++) { |
| 693 | if (p->tstamp_precision_list[i] == tstamp_precision) { |
| 694 | /* |
| 695 | * Yes. |
| 696 | */ |
| 697 | p->opt.tstamp_precision = tstamp_precision; |
| 698 | return (0); |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | /* |
| 704 | * We don't support this time stamp precision. |
| 705 | */ |
| 706 | return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP); |
| 707 | } |
| 708 | |
| 709 | int |
| 710 | pcap_get_tstamp_precision(pcap_t *p) |
| 711 | { |
| 712 | return (p->opt.tstamp_precision); |
| 713 | } |
| 714 | |
| 715 | int |
| 716 | pcap_activate(pcap_t *p) |
| 717 | { |
| 718 | int status; |
| 719 | |
| 720 | /* |
| 721 | * Catch attempts to re-activate an already-activated |
| 722 | * pcap_t; this should, for example, catch code that |
| 723 | * calls pcap_open_live() followed by pcap_activate(), |
| 724 | * as some code that showed up in a Stack Exchange |
| 725 | * question did. |
| 726 | */ |
| 727 | if (pcap_check_activated(p)) |
| 728 | return (PCAP_ERROR_ACTIVATED); |
| 729 | status = p->activate_op(p); |
| 730 | if (status >= 0) |
| 731 | p->activated = 1; |
| 732 | else { |
| 733 | if (p->errbuf[0] == '\0') { |
| 734 | /* |
| 735 | * No error message supplied by the activate routine; |
| 736 | * for the benefit of programs that don't specially |
| 737 | * handle errors other than PCAP_ERROR, return the |
| 738 | * error message corresponding to the status. |
| 739 | */ |
| 740 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s", |
| 741 | pcap_statustostr(status)); |
| 742 | } |
| 743 | |
| 744 | /* |
| 745 | * Undo any operation pointer setting, etc. done by |
| 746 | * the activate operation. |
| 747 | */ |
| 748 | initialize_ops(p); |
| 749 | } |
| 750 | return (status); |
| 751 | } |
| 752 | |
| 753 | pcap_t * |
| 754 | pcap_open_live(const char *source, int snaplen, int promisc, int to_ms, char *errbuf) |
| 755 | { |
| 756 | pcap_t *p; |
| 757 | int status; |
| 758 | |
| 759 | p = pcap_create(source, errbuf); |
| 760 | if (p == NULL) |
| 761 | return (NULL); |
| 762 | status = pcap_set_snaplen(p, snaplen); |
| 763 | if (status < 0) |
| 764 | goto fail; |
| 765 | status = pcap_set_promisc(p, promisc); |
| 766 | if (status < 0) |
| 767 | goto fail; |
| 768 | status = pcap_set_timeout(p, to_ms); |
| 769 | if (status < 0) |
| 770 | goto fail; |
| 771 | /* |
| 772 | * Mark this as opened with pcap_open_live(), so that, for |
| 773 | * example, we show the full list of DLT_ values, rather |
| 774 | * than just the ones that are compatible with capturing |
| 775 | * when not in monitor mode. That allows existing applications |
| 776 | * to work the way they used to work, but allows new applications |
| 777 | * that know about the new open API to, for example, find out the |
| 778 | * DLT_ values that they can select without changing whether |
| 779 | * the adapter is in monitor mode or not. |
| 780 | */ |
| 781 | p->oldstyle = 1; |
| 782 | status = pcap_activate(p); |
| 783 | if (status < 0) |
| 784 | goto fail; |
| 785 | return (p); |
| 786 | fail: |
| 787 | if (status == PCAP_ERROR) |
| 788 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", source, |
| 789 | p->errbuf); |
| 790 | else if (status == PCAP_ERROR_NO_SUCH_DEVICE || |
| 791 | status == PCAP_ERROR_PERM_DENIED || |
| 792 | status == PCAP_ERROR_PROMISC_PERM_DENIED) |
| 793 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s (%s)", source, |
| 794 | pcap_statustostr(status), p->errbuf); |
| 795 | else |
| 796 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", source, |
| 797 | pcap_statustostr(status)); |
| 798 | pcap_close(p); |
| 799 | return (NULL); |
| 800 | } |
| 801 | |
| 802 | pcap_t * |
| 803 | pcap_open_offline_common(char *ebuf, size_t size) |
| 804 | { |
| 805 | pcap_t *p; |
| 806 | |
| 807 | p = pcap_alloc_pcap_t(ebuf, size); |
| 808 | if (p == NULL) |
| 809 | return (NULL); |
| 810 | |
| 811 | p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO; |
| 812 | p->opt.source = strdup("(savefile)"); |
| 813 | if (p->opt.source == NULL) { |
| 814 | snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", |
| 815 | pcap_strerror(errno)); |
| 816 | free(p); |
| 817 | return (NULL); |
| 818 | } |
| 819 | |
| 820 | return (p); |
| 821 | } |
| 822 | |
| 823 | int |
| 824 | pcap_dispatch(pcap_t *p, int cnt, pcap_handler callback, u_char *user) |
| 825 | { |
| 826 | return (p->read_op(p, cnt, callback, user)); |
| 827 | } |
| 828 | |
| 829 | /* |
| 830 | * XXX - is this necessary? |
| 831 | */ |
| 832 | int |
| 833 | pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) |
| 834 | { |
| 835 | |
| 836 | return (p->read_op(p, cnt, callback, user)); |
| 837 | } |
| 838 | |
| 839 | int |
| 840 | pcap_loop(pcap_t *p, int cnt, pcap_handler callback, u_char *user) |
| 841 | { |
| 842 | register int n; |
| 843 | |
| 844 | for (;;) { |
| 845 | if (p->rfile != NULL) { |
| 846 | /* |
| 847 | * 0 means EOF, so don't loop if we get 0. |
| 848 | */ |
| 849 | n = pcap_offline_read(p, cnt, callback, user); |
| 850 | } else { |
| 851 | /* |
| 852 | * XXX keep reading until we get something |
| 853 | * (or an error occurs) |
| 854 | */ |
| 855 | do { |
| 856 | n = p->read_op(p, cnt, callback, user); |
| 857 | } while (n == 0); |
| 858 | } |
| 859 | if (n <= 0) |
| 860 | return (n); |
| 861 | if (!PACKET_COUNT_IS_UNLIMITED(cnt)) { |
| 862 | cnt -= n; |
| 863 | if (cnt <= 0) |
| 864 | return (0); |
| 865 | } |
| 866 | } |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 867 | } |
| 868 | |
| 869 | /* |
| 870 | * Force the loop in "pcap_read()" or "pcap_read_offline()" to terminate. |
| 871 | */ |
| 872 | void |
| 873 | pcap_breakloop(pcap_t *p) |
| 874 | { |
| 875 | p->break_loop = 1; |
| 876 | } |
| 877 | |
| 878 | int |
| 879 | pcap_datalink(pcap_t *p) |
| 880 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 881 | if (!p->activated) |
| 882 | return (PCAP_ERROR_NOT_ACTIVATED); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 883 | return (p->linktype); |
| 884 | } |
| 885 | |
| 886 | int |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 887 | pcap_datalink_ext(pcap_t *p) |
| 888 | { |
| 889 | if (!p->activated) |
| 890 | return (PCAP_ERROR_NOT_ACTIVATED); |
| 891 | return (p->linktype_ext); |
| 892 | } |
| 893 | |
| 894 | int |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 895 | pcap_list_datalinks(pcap_t *p, int **dlt_buffer) |
| 896 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 897 | if (!p->activated) |
| 898 | return (PCAP_ERROR_NOT_ACTIVATED); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 899 | if (p->dlt_count == 0) { |
| 900 | /* |
| 901 | * We couldn't fetch the list of DLTs, which means |
| 902 | * this platform doesn't support changing the |
| 903 | * DLT for an interface. Return a list of DLTs |
| 904 | * containing only the DLT this device supports. |
| 905 | */ |
| 906 | *dlt_buffer = (int*)malloc(sizeof(**dlt_buffer)); |
| 907 | if (*dlt_buffer == NULL) { |
| 908 | (void)snprintf(p->errbuf, sizeof(p->errbuf), |
| 909 | "malloc: %s", pcap_strerror(errno)); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 910 | return (PCAP_ERROR); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 911 | } |
| 912 | **dlt_buffer = p->linktype; |
| 913 | return (1); |
| 914 | } else { |
| 915 | *dlt_buffer = (int*)calloc(sizeof(**dlt_buffer), p->dlt_count); |
| 916 | if (*dlt_buffer == NULL) { |
| 917 | (void)snprintf(p->errbuf, sizeof(p->errbuf), |
| 918 | "malloc: %s", pcap_strerror(errno)); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 919 | return (PCAP_ERROR); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 920 | } |
| 921 | (void)memcpy(*dlt_buffer, p->dlt_list, |
| 922 | sizeof(**dlt_buffer) * p->dlt_count); |
| 923 | return (p->dlt_count); |
| 924 | } |
| 925 | } |
| 926 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 927 | /* |
| 928 | * In Windows, you might have a library built with one version of the |
| 929 | * C runtime library and an application built with another version of |
| 930 | * the C runtime library, which means that the library might use one |
| 931 | * version of malloc() and free() and the application might use another |
| 932 | * version of malloc() and free(). If so, that means something |
| 933 | * allocated by the library cannot be freed by the application, so we |
| 934 | * need to have a pcap_free_datalinks() routine to free up the list |
| 935 | * allocated by pcap_list_datalinks(), even though it's just a wrapper |
| 936 | * around free(). |
| 937 | */ |
| 938 | void |
| 939 | pcap_free_datalinks(int *dlt_list) |
| 940 | { |
| 941 | free(dlt_list); |
| 942 | } |
| 943 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 944 | int |
| 945 | pcap_set_datalink(pcap_t *p, int dlt) |
| 946 | { |
| 947 | int i; |
| 948 | const char *dlt_name; |
| 949 | |
| 950 | if (p->dlt_count == 0 || p->set_datalink_op == NULL) { |
| 951 | /* |
| 952 | * We couldn't fetch the list of DLTs, or we don't |
| 953 | * have a "set datalink" operation, which means |
| 954 | * this platform doesn't support changing the |
| 955 | * DLT for an interface. Check whether the new |
| 956 | * DLT is the one this interface supports. |
| 957 | */ |
| 958 | if (p->linktype != dlt) |
| 959 | goto unsupported; |
| 960 | |
| 961 | /* |
| 962 | * It is, so there's nothing we need to do here. |
| 963 | */ |
| 964 | return (0); |
| 965 | } |
| 966 | for (i = 0; i < p->dlt_count; i++) |
| 967 | if (p->dlt_list[i] == dlt) |
| 968 | break; |
| 969 | if (i >= p->dlt_count) |
| 970 | goto unsupported; |
| 971 | if (p->dlt_count == 2 && p->dlt_list[0] == DLT_EN10MB && |
| 972 | dlt == DLT_DOCSIS) { |
| 973 | /* |
| 974 | * This is presumably an Ethernet device, as the first |
| 975 | * link-layer type it offers is DLT_EN10MB, and the only |
| 976 | * other type it offers is DLT_DOCSIS. That means that |
| 977 | * we can't tell the driver to supply DOCSIS link-layer |
| 978 | * headers - we're just pretending that's what we're |
| 979 | * getting, as, presumably, we're capturing on a dedicated |
| 980 | * link to a Cisco Cable Modem Termination System, and |
| 981 | * it's putting raw DOCSIS frames on the wire inside low-level |
| 982 | * Ethernet framing. |
| 983 | */ |
| 984 | p->linktype = dlt; |
| 985 | return (0); |
| 986 | } |
| 987 | if (p->set_datalink_op(p, dlt) == -1) |
| 988 | return (-1); |
| 989 | p->linktype = dlt; |
| 990 | return (0); |
| 991 | |
| 992 | unsupported: |
| 993 | dlt_name = pcap_datalink_val_to_name(dlt); |
| 994 | if (dlt_name != NULL) { |
| 995 | (void) snprintf(p->errbuf, sizeof(p->errbuf), |
| 996 | "%s is not one of the DLTs supported by this device", |
| 997 | dlt_name); |
| 998 | } else { |
| 999 | (void) snprintf(p->errbuf, sizeof(p->errbuf), |
| 1000 | "DLT %d is not one of the DLTs supported by this device", |
| 1001 | dlt); |
| 1002 | } |
| 1003 | return (-1); |
| 1004 | } |
| 1005 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1006 | /* |
| 1007 | * This array is designed for mapping upper and lower case letter |
| 1008 | * together for a case independent comparison. The mappings are |
| 1009 | * based upon ascii character sequences. |
| 1010 | */ |
| 1011 | static const u_char charmap[] = { |
| 1012 | (u_char)'\000', (u_char)'\001', (u_char)'\002', (u_char)'\003', |
| 1013 | (u_char)'\004', (u_char)'\005', (u_char)'\006', (u_char)'\007', |
| 1014 | (u_char)'\010', (u_char)'\011', (u_char)'\012', (u_char)'\013', |
| 1015 | (u_char)'\014', (u_char)'\015', (u_char)'\016', (u_char)'\017', |
| 1016 | (u_char)'\020', (u_char)'\021', (u_char)'\022', (u_char)'\023', |
| 1017 | (u_char)'\024', (u_char)'\025', (u_char)'\026', (u_char)'\027', |
| 1018 | (u_char)'\030', (u_char)'\031', (u_char)'\032', (u_char)'\033', |
| 1019 | (u_char)'\034', (u_char)'\035', (u_char)'\036', (u_char)'\037', |
| 1020 | (u_char)'\040', (u_char)'\041', (u_char)'\042', (u_char)'\043', |
| 1021 | (u_char)'\044', (u_char)'\045', (u_char)'\046', (u_char)'\047', |
| 1022 | (u_char)'\050', (u_char)'\051', (u_char)'\052', (u_char)'\053', |
| 1023 | (u_char)'\054', (u_char)'\055', (u_char)'\056', (u_char)'\057', |
| 1024 | (u_char)'\060', (u_char)'\061', (u_char)'\062', (u_char)'\063', |
| 1025 | (u_char)'\064', (u_char)'\065', (u_char)'\066', (u_char)'\067', |
| 1026 | (u_char)'\070', (u_char)'\071', (u_char)'\072', (u_char)'\073', |
| 1027 | (u_char)'\074', (u_char)'\075', (u_char)'\076', (u_char)'\077', |
| 1028 | (u_char)'\100', (u_char)'\141', (u_char)'\142', (u_char)'\143', |
| 1029 | (u_char)'\144', (u_char)'\145', (u_char)'\146', (u_char)'\147', |
| 1030 | (u_char)'\150', (u_char)'\151', (u_char)'\152', (u_char)'\153', |
| 1031 | (u_char)'\154', (u_char)'\155', (u_char)'\156', (u_char)'\157', |
| 1032 | (u_char)'\160', (u_char)'\161', (u_char)'\162', (u_char)'\163', |
| 1033 | (u_char)'\164', (u_char)'\165', (u_char)'\166', (u_char)'\167', |
| 1034 | (u_char)'\170', (u_char)'\171', (u_char)'\172', (u_char)'\133', |
| 1035 | (u_char)'\134', (u_char)'\135', (u_char)'\136', (u_char)'\137', |
| 1036 | (u_char)'\140', (u_char)'\141', (u_char)'\142', (u_char)'\143', |
| 1037 | (u_char)'\144', (u_char)'\145', (u_char)'\146', (u_char)'\147', |
| 1038 | (u_char)'\150', (u_char)'\151', (u_char)'\152', (u_char)'\153', |
| 1039 | (u_char)'\154', (u_char)'\155', (u_char)'\156', (u_char)'\157', |
| 1040 | (u_char)'\160', (u_char)'\161', (u_char)'\162', (u_char)'\163', |
| 1041 | (u_char)'\164', (u_char)'\165', (u_char)'\166', (u_char)'\167', |
| 1042 | (u_char)'\170', (u_char)'\171', (u_char)'\172', (u_char)'\173', |
| 1043 | (u_char)'\174', (u_char)'\175', (u_char)'\176', (u_char)'\177', |
| 1044 | (u_char)'\200', (u_char)'\201', (u_char)'\202', (u_char)'\203', |
| 1045 | (u_char)'\204', (u_char)'\205', (u_char)'\206', (u_char)'\207', |
| 1046 | (u_char)'\210', (u_char)'\211', (u_char)'\212', (u_char)'\213', |
| 1047 | (u_char)'\214', (u_char)'\215', (u_char)'\216', (u_char)'\217', |
| 1048 | (u_char)'\220', (u_char)'\221', (u_char)'\222', (u_char)'\223', |
| 1049 | (u_char)'\224', (u_char)'\225', (u_char)'\226', (u_char)'\227', |
| 1050 | (u_char)'\230', (u_char)'\231', (u_char)'\232', (u_char)'\233', |
| 1051 | (u_char)'\234', (u_char)'\235', (u_char)'\236', (u_char)'\237', |
| 1052 | (u_char)'\240', (u_char)'\241', (u_char)'\242', (u_char)'\243', |
| 1053 | (u_char)'\244', (u_char)'\245', (u_char)'\246', (u_char)'\247', |
| 1054 | (u_char)'\250', (u_char)'\251', (u_char)'\252', (u_char)'\253', |
| 1055 | (u_char)'\254', (u_char)'\255', (u_char)'\256', (u_char)'\257', |
| 1056 | (u_char)'\260', (u_char)'\261', (u_char)'\262', (u_char)'\263', |
| 1057 | (u_char)'\264', (u_char)'\265', (u_char)'\266', (u_char)'\267', |
| 1058 | (u_char)'\270', (u_char)'\271', (u_char)'\272', (u_char)'\273', |
| 1059 | (u_char)'\274', (u_char)'\275', (u_char)'\276', (u_char)'\277', |
| 1060 | (u_char)'\300', (u_char)'\341', (u_char)'\342', (u_char)'\343', |
| 1061 | (u_char)'\344', (u_char)'\345', (u_char)'\346', (u_char)'\347', |
| 1062 | (u_char)'\350', (u_char)'\351', (u_char)'\352', (u_char)'\353', |
| 1063 | (u_char)'\354', (u_char)'\355', (u_char)'\356', (u_char)'\357', |
| 1064 | (u_char)'\360', (u_char)'\361', (u_char)'\362', (u_char)'\363', |
| 1065 | (u_char)'\364', (u_char)'\365', (u_char)'\366', (u_char)'\367', |
| 1066 | (u_char)'\370', (u_char)'\371', (u_char)'\372', (u_char)'\333', |
| 1067 | (u_char)'\334', (u_char)'\335', (u_char)'\336', (u_char)'\337', |
| 1068 | (u_char)'\340', (u_char)'\341', (u_char)'\342', (u_char)'\343', |
| 1069 | (u_char)'\344', (u_char)'\345', (u_char)'\346', (u_char)'\347', |
| 1070 | (u_char)'\350', (u_char)'\351', (u_char)'\352', (u_char)'\353', |
| 1071 | (u_char)'\354', (u_char)'\355', (u_char)'\356', (u_char)'\357', |
| 1072 | (u_char)'\360', (u_char)'\361', (u_char)'\362', (u_char)'\363', |
| 1073 | (u_char)'\364', (u_char)'\365', (u_char)'\366', (u_char)'\367', |
| 1074 | (u_char)'\370', (u_char)'\371', (u_char)'\372', (u_char)'\373', |
| 1075 | (u_char)'\374', (u_char)'\375', (u_char)'\376', (u_char)'\377', |
| 1076 | }; |
| 1077 | |
| 1078 | int |
| 1079 | pcap_strcasecmp(const char *s1, const char *s2) |
| 1080 | { |
| 1081 | register const u_char *cm = charmap, |
| 1082 | *us1 = (const u_char *)s1, |
| 1083 | *us2 = (const u_char *)s2; |
| 1084 | |
| 1085 | while (cm[*us1] == cm[*us2++]) |
| 1086 | if (*us1++ == '\0') |
| 1087 | return(0); |
| 1088 | return (cm[*us1] - cm[*--us2]); |
| 1089 | } |
| 1090 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1091 | struct dlt_choice { |
| 1092 | const char *name; |
| 1093 | const char *description; |
| 1094 | int dlt; |
| 1095 | }; |
| 1096 | |
| 1097 | #define DLT_CHOICE(code, description) { #code, description, code } |
| 1098 | #define DLT_CHOICE_SENTINEL { NULL, NULL, 0 } |
| 1099 | |
| 1100 | static struct dlt_choice dlt_choices[] = { |
| 1101 | DLT_CHOICE(DLT_NULL, "BSD loopback"), |
| 1102 | DLT_CHOICE(DLT_EN10MB, "Ethernet"), |
| 1103 | DLT_CHOICE(DLT_IEEE802, "Token ring"), |
| 1104 | DLT_CHOICE(DLT_ARCNET, "BSD ARCNET"), |
| 1105 | DLT_CHOICE(DLT_SLIP, "SLIP"), |
| 1106 | DLT_CHOICE(DLT_PPP, "PPP"), |
| 1107 | DLT_CHOICE(DLT_FDDI, "FDDI"), |
| 1108 | DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 LLC-encapsulated ATM"), |
| 1109 | DLT_CHOICE(DLT_RAW, "Raw IP"), |
| 1110 | DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"), |
| 1111 | DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"), |
| 1112 | DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"), |
| 1113 | DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"), |
| 1114 | DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"), |
| 1115 | DLT_CHOICE(DLT_SYMANTEC_FIREWALL, "Symantec Firewall"), |
| 1116 | DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"), |
| 1117 | DLT_CHOICE(DLT_IEEE802_11, "802.11"), |
| 1118 | DLT_CHOICE(DLT_FRELAY, "Frame Relay"), |
| 1119 | DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"), |
| 1120 | DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"), |
| 1121 | DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"), |
| 1122 | DLT_CHOICE(DLT_LTALK, "Localtalk"), |
| 1123 | DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"), |
| 1124 | DLT_CHOICE(DLT_PFSYNC, "Packet filter state syncing"), |
| 1125 | DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"), |
| 1126 | DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"), |
| 1127 | DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"), |
| 1128 | DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus radiotap header"), |
| 1129 | DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"), |
| 1130 | DLT_CHOICE(DLT_JUNIPER_MLPPP, "Juniper Multi-Link PPP"), |
| 1131 | DLT_CHOICE(DLT_JUNIPER_MLFR, "Juniper Multi-Link Frame Relay"), |
| 1132 | DLT_CHOICE(DLT_JUNIPER_ES, "Juniper Encryption Services PIC"), |
| 1133 | DLT_CHOICE(DLT_JUNIPER_GGSN, "Juniper GGSN PIC"), |
| 1134 | DLT_CHOICE(DLT_JUNIPER_MFR, "Juniper FRF.16 Frame Relay"), |
| 1135 | DLT_CHOICE(DLT_JUNIPER_ATM2, "Juniper ATM2 PIC"), |
| 1136 | DLT_CHOICE(DLT_JUNIPER_SERVICES, "Juniper Advanced Services PIC"), |
| 1137 | DLT_CHOICE(DLT_JUNIPER_ATM1, "Juniper ATM1 PIC"), |
| 1138 | DLT_CHOICE(DLT_APPLE_IP_OVER_IEEE1394, "Apple IP-over-IEEE 1394"), |
| 1139 | DLT_CHOICE(DLT_MTP2_WITH_PHDR, "SS7 MTP2 with Pseudo-header"), |
| 1140 | DLT_CHOICE(DLT_MTP2, "SS7 MTP2"), |
| 1141 | DLT_CHOICE(DLT_MTP3, "SS7 MTP3"), |
| 1142 | DLT_CHOICE(DLT_SCCP, "SS7 SCCP"), |
| 1143 | DLT_CHOICE(DLT_DOCSIS, "DOCSIS"), |
| 1144 | DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"), |
| 1145 | DLT_CHOICE(DLT_IEEE802_11_RADIO_AVS, "802.11 plus AVS radio information header"), |
| 1146 | DLT_CHOICE(DLT_JUNIPER_MONITOR, "Juniper Passive Monitor PIC"), |
| 1147 | DLT_CHOICE(DLT_BACNET_MS_TP, "BACnet MS/TP"), |
| 1148 | DLT_CHOICE(DLT_PPP_PPPD, "PPP for pppd, with direction flag"), |
| 1149 | DLT_CHOICE(DLT_JUNIPER_PPPOE, "Juniper PPPoE"), |
| 1150 | DLT_CHOICE(DLT_JUNIPER_PPPOE_ATM, "Juniper PPPoE/ATM"), |
| 1151 | DLT_CHOICE(DLT_GPRS_LLC, "GPRS LLC"), |
| 1152 | DLT_CHOICE(DLT_GPF_T, "GPF-T"), |
| 1153 | DLT_CHOICE(DLT_GPF_F, "GPF-F"), |
| 1154 | DLT_CHOICE(DLT_JUNIPER_PIC_PEER, "Juniper PIC Peer"), |
| 1155 | DLT_CHOICE(DLT_ERF_ETH, "Ethernet with Endace ERF header"), |
| 1156 | DLT_CHOICE(DLT_ERF_POS, "Packet-over-SONET with Endace ERF header"), |
| 1157 | DLT_CHOICE(DLT_LINUX_LAPD, "Linux vISDN LAPD"), |
| 1158 | DLT_CHOICE(DLT_JUNIPER_ETHER, "Juniper Ethernet"), |
| 1159 | DLT_CHOICE(DLT_JUNIPER_PPP, "Juniper PPP"), |
| 1160 | DLT_CHOICE(DLT_JUNIPER_FRELAY, "Juniper Frame Relay"), |
| 1161 | DLT_CHOICE(DLT_JUNIPER_CHDLC, "Juniper C-HDLC"), |
| 1162 | DLT_CHOICE(DLT_MFR, "FRF.16 Frame Relay"), |
| 1163 | DLT_CHOICE(DLT_JUNIPER_VP, "Juniper Voice PIC"), |
| 1164 | DLT_CHOICE(DLT_A429, "Arinc 429"), |
| 1165 | DLT_CHOICE(DLT_A653_ICM, "Arinc 653 Interpartition Communication"), |
| 1166 | DLT_CHOICE(DLT_USB, "USB"), |
| 1167 | DLT_CHOICE(DLT_BLUETOOTH_HCI_H4, "Bluetooth HCI UART transport layer"), |
| 1168 | DLT_CHOICE(DLT_IEEE802_16_MAC_CPS, "IEEE 802.16 MAC Common Part Sublayer"), |
| 1169 | DLT_CHOICE(DLT_USB_LINUX, "USB with Linux header"), |
| 1170 | DLT_CHOICE(DLT_CAN20B, "Controller Area Network (CAN) v. 2.0B"), |
| 1171 | DLT_CHOICE(DLT_IEEE802_15_4_LINUX, "IEEE 802.15.4 with Linux padding"), |
| 1172 | DLT_CHOICE(DLT_PPI, "Per-Packet Information"), |
| 1173 | DLT_CHOICE(DLT_IEEE802_16_MAC_CPS_RADIO, "IEEE 802.16 MAC Common Part Sublayer plus radiotap header"), |
| 1174 | DLT_CHOICE(DLT_JUNIPER_ISM, "Juniper Integrated Service Module"), |
| 1175 | DLT_CHOICE(DLT_IEEE802_15_4, "IEEE 802.15.4 with FCS"), |
| 1176 | DLT_CHOICE(DLT_SITA, "SITA pseudo-header"), |
| 1177 | DLT_CHOICE(DLT_ERF, "Endace ERF header"), |
| 1178 | DLT_CHOICE(DLT_RAIF1, "Ethernet with u10 Networks pseudo-header"), |
| 1179 | DLT_CHOICE(DLT_IPMB, "IPMB"), |
| 1180 | DLT_CHOICE(DLT_JUNIPER_ST, "Juniper Secure Tunnel"), |
| 1181 | DLT_CHOICE(DLT_BLUETOOTH_HCI_H4_WITH_PHDR, "Bluetooth HCI UART transport layer plus pseudo-header"), |
| 1182 | DLT_CHOICE(DLT_AX25_KISS, "AX.25 with KISS header"), |
| 1183 | DLT_CHOICE(DLT_IEEE802_15_4_NONASK_PHY, "IEEE 802.15.4 with non-ASK PHY data"), |
| 1184 | DLT_CHOICE(DLT_MPLS, "MPLS with label as link-layer header"), |
| 1185 | DLT_CHOICE(DLT_USB_LINUX_MMAPPED, "USB with padded Linux header"), |
| 1186 | DLT_CHOICE(DLT_DECT, "DECT"), |
| 1187 | DLT_CHOICE(DLT_AOS, "AOS Space Data Link protocol"), |
| 1188 | DLT_CHOICE(DLT_WIHART, "Wireless HART"), |
| 1189 | DLT_CHOICE(DLT_FC_2, "Fibre Channel FC-2"), |
| 1190 | DLT_CHOICE(DLT_FC_2_WITH_FRAME_DELIMS, "Fibre Channel FC-2 with frame delimiters"), |
| 1191 | DLT_CHOICE(DLT_IPNET, "Solaris ipnet"), |
| 1192 | DLT_CHOICE(DLT_CAN_SOCKETCAN, "CAN-bus with SocketCAN headers"), |
| 1193 | DLT_CHOICE(DLT_IPV4, "Raw IPv4"), |
| 1194 | DLT_CHOICE(DLT_IPV6, "Raw IPv6"), |
| 1195 | DLT_CHOICE(DLT_IEEE802_15_4_NOFCS, "IEEE 802.15.4 without FCS"), |
| 1196 | DLT_CHOICE(DLT_JUNIPER_VS, "Juniper Virtual Server"), |
| 1197 | DLT_CHOICE(DLT_JUNIPER_SRX_E2E, "Juniper SRX E2E"), |
| 1198 | DLT_CHOICE(DLT_JUNIPER_FIBRECHANNEL, "Juniper Fibre Channel"), |
| 1199 | DLT_CHOICE(DLT_DVB_CI, "DVB-CI"), |
| 1200 | DLT_CHOICE(DLT_JUNIPER_ATM_CEMIC, "Juniper ATM CEMIC"), |
| 1201 | DLT_CHOICE(DLT_NFLOG, "Linux netfilter log messages"), |
| 1202 | DLT_CHOICE(DLT_NETANALYZER, "Ethernet with Hilscher netANALYZER pseudo-header"), |
| 1203 | DLT_CHOICE(DLT_NETANALYZER_TRANSPARENT, "Ethernet with Hilscher netANALYZER pseudo-header and with preamble and SFD"), |
| 1204 | DLT_CHOICE(DLT_IPOIB, "RFC 4391 IP-over-Infiniband"), |
| 1205 | DLT_CHOICE(DLT_DBUS, "D-Bus"), |
| 1206 | DLT_CHOICE_SENTINEL |
| 1207 | }; |
| 1208 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1209 | int |
| 1210 | pcap_datalink_name_to_val(const char *name) |
| 1211 | { |
| 1212 | int i; |
| 1213 | |
| 1214 | for (i = 0; dlt_choices[i].name != NULL; i++) { |
| 1215 | if (pcap_strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1, |
| 1216 | name) == 0) |
| 1217 | return (dlt_choices[i].dlt); |
| 1218 | } |
| 1219 | return (-1); |
| 1220 | } |
| 1221 | |
| 1222 | const char * |
| 1223 | pcap_datalink_val_to_name(int dlt) |
| 1224 | { |
| 1225 | int i; |
| 1226 | |
| 1227 | for (i = 0; dlt_choices[i].name != NULL; i++) { |
| 1228 | if (dlt_choices[i].dlt == dlt) |
| 1229 | return (dlt_choices[i].name + sizeof("DLT_") - 1); |
| 1230 | } |
| 1231 | return (NULL); |
| 1232 | } |
| 1233 | |
| 1234 | const char * |
| 1235 | pcap_datalink_val_to_description(int dlt) |
| 1236 | { |
| 1237 | int i; |
| 1238 | |
| 1239 | for (i = 0; dlt_choices[i].name != NULL; i++) { |
| 1240 | if (dlt_choices[i].dlt == dlt) |
| 1241 | return (dlt_choices[i].description); |
| 1242 | } |
| 1243 | return (NULL); |
| 1244 | } |
| 1245 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1246 | struct tstamp_type_choice { |
| 1247 | const char *name; |
| 1248 | const char *description; |
| 1249 | int type; |
| 1250 | }; |
| 1251 | |
| 1252 | static struct tstamp_type_choice tstamp_type_choices[] = { |
| 1253 | { "host", "Host", PCAP_TSTAMP_HOST }, |
| 1254 | { "host_lowprec", "Host, low precision", PCAP_TSTAMP_HOST_LOWPREC }, |
| 1255 | { "host_hiprec", "Host, high precision", PCAP_TSTAMP_HOST_HIPREC }, |
| 1256 | { "adapter", "Adapter", PCAP_TSTAMP_ADAPTER }, |
| 1257 | { "adapter_unsynced", "Adapter, not synced with system time", PCAP_TSTAMP_ADAPTER_UNSYNCED }, |
| 1258 | { NULL, NULL, 0 } |
| 1259 | }; |
| 1260 | |
| 1261 | int |
| 1262 | pcap_tstamp_type_name_to_val(const char *name) |
| 1263 | { |
| 1264 | int i; |
| 1265 | |
| 1266 | for (i = 0; tstamp_type_choices[i].name != NULL; i++) { |
| 1267 | if (pcap_strcasecmp(tstamp_type_choices[i].name, name) == 0) |
| 1268 | return (tstamp_type_choices[i].type); |
| 1269 | } |
| 1270 | return (PCAP_ERROR); |
| 1271 | } |
| 1272 | |
| 1273 | const char * |
| 1274 | pcap_tstamp_type_val_to_name(int tstamp_type) |
| 1275 | { |
| 1276 | int i; |
| 1277 | |
| 1278 | for (i = 0; tstamp_type_choices[i].name != NULL; i++) { |
| 1279 | if (tstamp_type_choices[i].type == tstamp_type) |
| 1280 | return (tstamp_type_choices[i].name); |
| 1281 | } |
| 1282 | return (NULL); |
| 1283 | } |
| 1284 | |
| 1285 | const char * |
| 1286 | pcap_tstamp_type_val_to_description(int tstamp_type) |
| 1287 | { |
| 1288 | int i; |
| 1289 | |
| 1290 | for (i = 0; tstamp_type_choices[i].name != NULL; i++) { |
| 1291 | if (tstamp_type_choices[i].type == tstamp_type) |
| 1292 | return (tstamp_type_choices[i].description); |
| 1293 | } |
| 1294 | return (NULL); |
| 1295 | } |
| 1296 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1297 | int |
| 1298 | pcap_snapshot(pcap_t *p) |
| 1299 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1300 | if (!p->activated) |
| 1301 | return (PCAP_ERROR_NOT_ACTIVATED); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1302 | return (p->snapshot); |
| 1303 | } |
| 1304 | |
| 1305 | int |
| 1306 | pcap_is_swapped(pcap_t *p) |
| 1307 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1308 | if (!p->activated) |
| 1309 | return (PCAP_ERROR_NOT_ACTIVATED); |
| 1310 | return (p->swapped); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | int |
| 1314 | pcap_major_version(pcap_t *p) |
| 1315 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1316 | if (!p->activated) |
| 1317 | return (PCAP_ERROR_NOT_ACTIVATED); |
| 1318 | return (p->version_major); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | int |
| 1322 | pcap_minor_version(pcap_t *p) |
| 1323 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1324 | if (!p->activated) |
| 1325 | return (PCAP_ERROR_NOT_ACTIVATED); |
| 1326 | return (p->version_minor); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | FILE * |
| 1330 | pcap_file(pcap_t *p) |
| 1331 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1332 | return (p->rfile); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1333 | } |
| 1334 | |
| 1335 | int |
| 1336 | pcap_fileno(pcap_t *p) |
| 1337 | { |
| 1338 | #ifndef WIN32 |
| 1339 | return (p->fd); |
| 1340 | #else |
| 1341 | if (p->adapter != NULL) |
| 1342 | return ((int)(DWORD)p->adapter->hFile); |
| 1343 | else |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1344 | return (PCAP_ERROR); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1345 | #endif |
| 1346 | } |
| 1347 | |
| 1348 | #if !defined(WIN32) && !defined(MSDOS) |
| 1349 | int |
| 1350 | pcap_get_selectable_fd(pcap_t *p) |
| 1351 | { |
| 1352 | return (p->selectable_fd); |
| 1353 | } |
| 1354 | #endif |
| 1355 | |
| 1356 | void |
| 1357 | pcap_perror(pcap_t *p, char *prefix) |
| 1358 | { |
| 1359 | fprintf(stderr, "%s: %s\n", prefix, p->errbuf); |
| 1360 | } |
| 1361 | |
| 1362 | char * |
| 1363 | pcap_geterr(pcap_t *p) |
| 1364 | { |
| 1365 | return (p->errbuf); |
| 1366 | } |
| 1367 | |
| 1368 | int |
| 1369 | pcap_getnonblock(pcap_t *p, char *errbuf) |
| 1370 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1371 | int ret; |
| 1372 | |
| 1373 | ret = p->getnonblock_op(p, errbuf); |
| 1374 | if (ret == -1) { |
| 1375 | /* |
| 1376 | * In case somebody depended on the bug wherein |
| 1377 | * the error message was put into p->errbuf |
| 1378 | * by pcap_getnonblock_fd(). |
| 1379 | */ |
| 1380 | strlcpy(p->errbuf, errbuf, PCAP_ERRBUF_SIZE); |
| 1381 | } |
| 1382 | return (ret); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1383 | } |
| 1384 | |
| 1385 | /* |
| 1386 | * Get the current non-blocking mode setting, under the assumption that |
| 1387 | * it's just the standard POSIX non-blocking flag. |
| 1388 | * |
| 1389 | * We don't look at "p->nonblock", in case somebody tweaked the FD |
| 1390 | * directly. |
| 1391 | */ |
| 1392 | #if !defined(WIN32) && !defined(MSDOS) |
| 1393 | int |
| 1394 | pcap_getnonblock_fd(pcap_t *p, char *errbuf) |
| 1395 | { |
| 1396 | int fdflags; |
| 1397 | |
| 1398 | fdflags = fcntl(p->fd, F_GETFL, 0); |
| 1399 | if (fdflags == -1) { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1400 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1401 | pcap_strerror(errno)); |
| 1402 | return (-1); |
| 1403 | } |
| 1404 | if (fdflags & O_NONBLOCK) |
| 1405 | return (1); |
| 1406 | else |
| 1407 | return (0); |
| 1408 | } |
| 1409 | #endif |
| 1410 | |
| 1411 | int |
| 1412 | pcap_setnonblock(pcap_t *p, int nonblock, char *errbuf) |
| 1413 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1414 | int ret; |
| 1415 | |
| 1416 | ret = p->setnonblock_op(p, nonblock, errbuf); |
| 1417 | if (ret == -1) { |
| 1418 | /* |
| 1419 | * In case somebody depended on the bug wherein |
| 1420 | * the error message was put into p->errbuf |
| 1421 | * by pcap_setnonblock_fd(). |
| 1422 | */ |
| 1423 | strlcpy(p->errbuf, errbuf, PCAP_ERRBUF_SIZE); |
| 1424 | } |
| 1425 | return (ret); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1426 | } |
| 1427 | |
| 1428 | #if !defined(WIN32) && !defined(MSDOS) |
| 1429 | /* |
| 1430 | * Set non-blocking mode, under the assumption that it's just the |
| 1431 | * standard POSIX non-blocking flag. (This can be called by the |
| 1432 | * per-platform non-blocking-mode routine if that routine also |
| 1433 | * needs to do some additional work.) |
| 1434 | */ |
| 1435 | int |
| 1436 | pcap_setnonblock_fd(pcap_t *p, int nonblock, char *errbuf) |
| 1437 | { |
| 1438 | int fdflags; |
| 1439 | |
| 1440 | fdflags = fcntl(p->fd, F_GETFL, 0); |
| 1441 | if (fdflags == -1) { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1442 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1443 | pcap_strerror(errno)); |
| 1444 | return (-1); |
| 1445 | } |
| 1446 | if (nonblock) |
| 1447 | fdflags |= O_NONBLOCK; |
| 1448 | else |
| 1449 | fdflags &= ~O_NONBLOCK; |
| 1450 | if (fcntl(p->fd, F_SETFL, fdflags) == -1) { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1451 | snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_SETFL: %s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1452 | pcap_strerror(errno)); |
| 1453 | return (-1); |
| 1454 | } |
| 1455 | return (0); |
| 1456 | } |
| 1457 | #endif |
| 1458 | |
| 1459 | #ifdef WIN32 |
| 1460 | /* |
| 1461 | * Generate a string for the last Win32-specific error (i.e. an error generated when |
| 1462 | * calling a Win32 API). |
| 1463 | * For errors occurred during standard C calls, we still use pcap_strerror() |
| 1464 | */ |
| 1465 | char * |
| 1466 | pcap_win32strerror(void) |
| 1467 | { |
| 1468 | DWORD error; |
| 1469 | static char errbuf[PCAP_ERRBUF_SIZE+1]; |
| 1470 | int errlen; |
| 1471 | char *p; |
| 1472 | |
| 1473 | error = GetLastError(); |
| 1474 | FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error, 0, errbuf, |
| 1475 | PCAP_ERRBUF_SIZE, NULL); |
| 1476 | |
| 1477 | /* |
| 1478 | * "FormatMessage()" "helpfully" sticks CR/LF at the end of the |
| 1479 | * message. Get rid of it. |
| 1480 | */ |
| 1481 | errlen = strlen(errbuf); |
| 1482 | if (errlen >= 2) { |
| 1483 | errbuf[errlen - 1] = '\0'; |
| 1484 | errbuf[errlen - 2] = '\0'; |
| 1485 | } |
| 1486 | p = strchr(errbuf, '\0'); |
| 1487 | snprintf (p, sizeof(errbuf)-(p-errbuf), " (%lu)", error); |
| 1488 | return (errbuf); |
| 1489 | } |
| 1490 | #endif |
| 1491 | |
| 1492 | /* |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1493 | * Generate error strings for PCAP_ERROR_ and PCAP_WARNING_ values. |
| 1494 | */ |
| 1495 | const char * |
| 1496 | pcap_statustostr(int errnum) |
| 1497 | { |
| 1498 | static char ebuf[15+10+1]; |
| 1499 | |
| 1500 | switch (errnum) { |
| 1501 | |
| 1502 | case PCAP_WARNING: |
| 1503 | return("Generic warning"); |
| 1504 | |
| 1505 | case PCAP_WARNING_TSTAMP_TYPE_NOTSUP: |
| 1506 | return ("That type of time stamp is not supported by that device"); |
| 1507 | |
| 1508 | case PCAP_WARNING_PROMISC_NOTSUP: |
| 1509 | return ("That device doesn't support promiscuous mode"); |
| 1510 | |
| 1511 | case PCAP_ERROR: |
| 1512 | return("Generic error"); |
| 1513 | |
| 1514 | case PCAP_ERROR_BREAK: |
| 1515 | return("Loop terminated by pcap_breakloop"); |
| 1516 | |
| 1517 | case PCAP_ERROR_NOT_ACTIVATED: |
| 1518 | return("The pcap_t has not been activated"); |
| 1519 | |
| 1520 | case PCAP_ERROR_ACTIVATED: |
| 1521 | return ("The setting can't be changed after the pcap_t is activated"); |
| 1522 | |
| 1523 | case PCAP_ERROR_NO_SUCH_DEVICE: |
| 1524 | return ("No such device exists"); |
| 1525 | |
| 1526 | case PCAP_ERROR_RFMON_NOTSUP: |
| 1527 | return ("That device doesn't support monitor mode"); |
| 1528 | |
| 1529 | case PCAP_ERROR_NOT_RFMON: |
| 1530 | return ("That operation is supported only in monitor mode"); |
| 1531 | |
| 1532 | case PCAP_ERROR_PERM_DENIED: |
| 1533 | return ("You don't have permission to capture on that device"); |
| 1534 | |
| 1535 | case PCAP_ERROR_IFACE_NOT_UP: |
| 1536 | return ("That device is not up"); |
| 1537 | |
| 1538 | case PCAP_ERROR_CANTSET_TSTAMP_TYPE: |
| 1539 | return ("That device doesn't support setting the time stamp type"); |
| 1540 | |
| 1541 | case PCAP_ERROR_PROMISC_PERM_DENIED: |
| 1542 | return ("You don't have permission to capture in promiscuous mode on that device"); |
| 1543 | |
| 1544 | case PCAP_ERROR_TSTAMP_PRECISION_NOTSUP: |
| 1545 | return ("That device doesn't support that time stamp precision"); |
| 1546 | } |
| 1547 | (void)snprintf(ebuf, sizeof ebuf, "Unknown error: %d", errnum); |
| 1548 | return(ebuf); |
| 1549 | } |
| 1550 | |
| 1551 | /* |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1552 | * Not all systems have strerror(). |
| 1553 | */ |
| 1554 | const char * |
| 1555 | pcap_strerror(int errnum) |
| 1556 | { |
| 1557 | #ifdef HAVE_STRERROR |
| 1558 | return (strerror(errnum)); |
| 1559 | #else |
| 1560 | extern int sys_nerr; |
| 1561 | extern const char *const sys_errlist[]; |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1562 | static char ebuf[15+10+1]; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1563 | |
| 1564 | if ((unsigned int)errnum < sys_nerr) |
| 1565 | return ((char *)sys_errlist[errnum]); |
| 1566 | (void)snprintf(ebuf, sizeof ebuf, "Unknown error: %d", errnum); |
| 1567 | return(ebuf); |
| 1568 | #endif |
| 1569 | } |
| 1570 | |
| 1571 | int |
| 1572 | pcap_setfilter(pcap_t *p, struct bpf_program *fp) |
| 1573 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1574 | return (p->setfilter_op(p, fp)); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1575 | } |
| 1576 | |
| 1577 | /* |
| 1578 | * Set direction flag, which controls whether we accept only incoming |
| 1579 | * packets, only outgoing packets, or both. |
| 1580 | * Note that, depending on the platform, some or all direction arguments |
| 1581 | * might not be supported. |
| 1582 | */ |
| 1583 | int |
| 1584 | pcap_setdirection(pcap_t *p, pcap_direction_t d) |
| 1585 | { |
| 1586 | if (p->setdirection_op == NULL) { |
| 1587 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1588 | "Setting direction is not implemented on this platform"); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1589 | return (-1); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1590 | } else |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1591 | return (p->setdirection_op(p, d)); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1592 | } |
| 1593 | |
| 1594 | int |
| 1595 | pcap_stats(pcap_t *p, struct pcap_stat *ps) |
| 1596 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1597 | return (p->stats_op(p, ps)); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1598 | } |
| 1599 | |
| 1600 | static int |
| 1601 | pcap_stats_dead(pcap_t *p, struct pcap_stat *ps _U_) |
| 1602 | { |
| 1603 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1604 | "Statistics aren't available from a pcap_open_dead pcap_t"); |
| 1605 | return (-1); |
| 1606 | } |
| 1607 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1608 | #ifdef WIN32 |
| 1609 | int |
| 1610 | pcap_setbuff(pcap_t *p, int dim) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1611 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1612 | return (p->setbuff_op(p, dim)); |
| 1613 | } |
| 1614 | |
| 1615 | static int |
| 1616 | pcap_setbuff_dead(pcap_t *p, int dim) |
| 1617 | { |
| 1618 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1619 | "The kernel buffer size cannot be set on a pcap_open_dead pcap_t"); |
| 1620 | return (-1); |
| 1621 | } |
| 1622 | |
| 1623 | int |
| 1624 | pcap_setmode(pcap_t *p, int mode) |
| 1625 | { |
| 1626 | return (p->setmode_op(p, mode)); |
| 1627 | } |
| 1628 | |
| 1629 | static int |
| 1630 | pcap_setmode_dead(pcap_t *p, int mode) |
| 1631 | { |
| 1632 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1633 | "impossible to set mode on a pcap_open_dead pcap_t"); |
| 1634 | return (-1); |
| 1635 | } |
| 1636 | |
| 1637 | int |
| 1638 | pcap_setmintocopy(pcap_t *p, int size) |
| 1639 | { |
| 1640 | return (p->setmintocopy_op(p, size)); |
| 1641 | } |
| 1642 | |
| 1643 | Adapter * |
| 1644 | pcap_get_adapter(pcap_t *p) |
| 1645 | { |
| 1646 | return (p->getadapter_op(p)); |
| 1647 | } |
| 1648 | |
| 1649 | static int |
| 1650 | pcap_setmintocopy_dead(pcap_t *p, int size) |
| 1651 | { |
| 1652 | snprintf(p->errbuf, PCAP_ERRBUF_SIZE, |
| 1653 | "The mintocopy parameter cannot be set on a pcap_open_dead pcap_t"); |
| 1654 | return (-1); |
| 1655 | } |
| 1656 | #endif |
| 1657 | |
| 1658 | /* |
| 1659 | * On some platforms, we need to clean up promiscuous or monitor mode |
| 1660 | * when we close a device - and we want that to happen even if the |
| 1661 | * application just exits without explicitl closing devices. |
| 1662 | * On those platforms, we need to register a "close all the pcaps" |
| 1663 | * routine to be called when we exit, and need to maintain a list of |
| 1664 | * pcaps that need to be closed to clean up modes. |
| 1665 | * |
| 1666 | * XXX - not thread-safe. |
| 1667 | */ |
| 1668 | |
| 1669 | /* |
| 1670 | * List of pcaps on which we've done something that needs to be |
| 1671 | * cleaned up. |
| 1672 | * If there are any such pcaps, we arrange to call "pcap_close_all()" |
| 1673 | * when we exit, and have it close all of them. |
| 1674 | */ |
| 1675 | static struct pcap *pcaps_to_close; |
| 1676 | |
| 1677 | /* |
| 1678 | * TRUE if we've already called "atexit()" to cause "pcap_close_all()" to |
| 1679 | * be called on exit. |
| 1680 | */ |
| 1681 | static int did_atexit; |
| 1682 | |
| 1683 | static void |
| 1684 | pcap_close_all(void) |
| 1685 | { |
| 1686 | struct pcap *handle; |
| 1687 | |
| 1688 | while ((handle = pcaps_to_close) != NULL) |
| 1689 | pcap_close(handle); |
| 1690 | } |
| 1691 | |
| 1692 | int |
| 1693 | pcap_do_addexit(pcap_t *p) |
| 1694 | { |
| 1695 | /* |
| 1696 | * If we haven't already done so, arrange to have |
| 1697 | * "pcap_close_all()" called when we exit. |
| 1698 | */ |
| 1699 | if (!did_atexit) { |
| 1700 | if (atexit(pcap_close_all) == -1) { |
| 1701 | /* |
| 1702 | * "atexit()" failed; let our caller know. |
| 1703 | */ |
| 1704 | strncpy(p->errbuf, "atexit failed", |
| 1705 | PCAP_ERRBUF_SIZE); |
| 1706 | return (0); |
| 1707 | } |
| 1708 | did_atexit = 1; |
| 1709 | } |
| 1710 | return (1); |
| 1711 | } |
| 1712 | |
| 1713 | void |
| 1714 | pcap_add_to_pcaps_to_close(pcap_t *p) |
| 1715 | { |
| 1716 | p->next = pcaps_to_close; |
| 1717 | pcaps_to_close = p; |
| 1718 | } |
| 1719 | |
| 1720 | void |
| 1721 | pcap_remove_from_pcaps_to_close(pcap_t *p) |
| 1722 | { |
| 1723 | pcap_t *pc, *prevpc; |
| 1724 | |
| 1725 | for (pc = pcaps_to_close, prevpc = NULL; pc != NULL; |
| 1726 | prevpc = pc, pc = pc->next) { |
| 1727 | if (pc == p) { |
| 1728 | /* |
| 1729 | * Found it. Remove it from the list. |
| 1730 | */ |
| 1731 | if (prevpc == NULL) { |
| 1732 | /* |
| 1733 | * It was at the head of the list. |
| 1734 | */ |
| 1735 | pcaps_to_close = pc->next; |
| 1736 | } else { |
| 1737 | /* |
| 1738 | * It was in the middle of the list. |
| 1739 | */ |
| 1740 | prevpc->next = pc->next; |
| 1741 | } |
| 1742 | break; |
| 1743 | } |
| 1744 | } |
| 1745 | } |
| 1746 | |
| 1747 | void |
| 1748 | pcap_cleanup_live_common(pcap_t *p) |
| 1749 | { |
| 1750 | if (p->buffer != NULL) { |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1751 | free(p->buffer); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1752 | p->buffer = NULL; |
| 1753 | } |
| 1754 | if (p->dlt_list != NULL) { |
| 1755 | free(p->dlt_list); |
| 1756 | p->dlt_list = NULL; |
| 1757 | p->dlt_count = 0; |
| 1758 | } |
| 1759 | if (p->tstamp_type_list != NULL) { |
| 1760 | free(p->tstamp_type_list); |
| 1761 | p->tstamp_type_list = NULL; |
| 1762 | p->tstamp_type_count = 0; |
| 1763 | } |
| 1764 | if (p->tstamp_precision_list != NULL) { |
| 1765 | free(p->tstamp_precision_list); |
| 1766 | p->tstamp_precision_list = NULL; |
| 1767 | p->tstamp_precision_count = 0; |
| 1768 | } |
| 1769 | pcap_freecode(&p->fcode); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1770 | #if !defined(WIN32) && !defined(MSDOS) |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1771 | if (p->fd >= 0) { |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1772 | close(p->fd); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1773 | p->fd = -1; |
| 1774 | } |
| 1775 | p->selectable_fd = -1; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1776 | #endif |
| 1777 | } |
| 1778 | |
| 1779 | static void |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1780 | pcap_cleanup_dead(pcap_t *p _U_) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1781 | { |
| 1782 | /* Nothing to do. */ |
| 1783 | } |
| 1784 | |
| 1785 | pcap_t * |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1786 | pcap_open_dead_with_tstamp_precision(int linktype, int snaplen, u_int precision) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1787 | { |
| 1788 | pcap_t *p; |
| 1789 | |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1790 | switch (precision) { |
| 1791 | |
| 1792 | case PCAP_TSTAMP_PRECISION_MICRO: |
| 1793 | case PCAP_TSTAMP_PRECISION_NANO: |
| 1794 | break; |
| 1795 | |
| 1796 | default: |
| 1797 | return NULL; |
| 1798 | } |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1799 | p = malloc(sizeof(*p)); |
| 1800 | if (p == NULL) |
| 1801 | return NULL; |
| 1802 | memset (p, 0, sizeof(*p)); |
| 1803 | p->snapshot = snaplen; |
| 1804 | p->linktype = linktype; |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1805 | p->opt.tstamp_precision = precision; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1806 | p->stats_op = pcap_stats_dead; |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1807 | #ifdef WIN32 |
| 1808 | p->setbuff_op = pcap_setbuff_dead; |
| 1809 | p->setmode_op = pcap_setmode_dead; |
| 1810 | p->setmintocopy_op = pcap_setmintocopy_dead; |
| 1811 | #endif |
| 1812 | p->cleanup_op = pcap_cleanup_dead; |
| 1813 | p->activated = 1; |
| 1814 | return (p); |
| 1815 | } |
| 1816 | |
| 1817 | pcap_t * |
| 1818 | pcap_open_dead(int linktype, int snaplen) |
| 1819 | { |
| 1820 | return (pcap_open_dead_with_tstamp_precision(linktype, snaplen, |
| 1821 | PCAP_TSTAMP_PRECISION_MICRO)); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1822 | } |
| 1823 | |
| 1824 | /* |
| 1825 | * API compatible with WinPcap's "send a packet" routine - returns -1 |
| 1826 | * on error, 0 otherwise. |
| 1827 | * |
| 1828 | * XXX - what if we get a short write? |
| 1829 | */ |
| 1830 | int |
| 1831 | pcap_sendpacket(pcap_t *p, const u_char *buf, int size) |
| 1832 | { |
| 1833 | if (p->inject_op(p, buf, size) == -1) |
| 1834 | return (-1); |
| 1835 | return (0); |
| 1836 | } |
| 1837 | |
| 1838 | /* |
| 1839 | * API compatible with OpenBSD's "send a packet" routine - returns -1 on |
| 1840 | * error, number of bytes written otherwise. |
| 1841 | */ |
| 1842 | int |
| 1843 | pcap_inject(pcap_t *p, const void *buf, size_t size) |
| 1844 | { |
| 1845 | return (p->inject_op(p, buf, size)); |
| 1846 | } |
| 1847 | |
| 1848 | void |
| 1849 | pcap_close(pcap_t *p) |
| 1850 | { |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1851 | if (p->opt.source != NULL) |
| 1852 | free(p->opt.source); |
| 1853 | p->cleanup_op(p); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1854 | free(p); |
| 1855 | } |
| 1856 | |
| 1857 | /* |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1858 | * Given a BPF program, a pcap_pkthdr structure for a packet, and the raw |
| 1859 | * data for the packet, check whether the packet passes the filter. |
| 1860 | * Returns the return value of the filter program, which will be zero if |
| 1861 | * the packet doesn't pass and non-zero if the packet does pass. |
| 1862 | */ |
| 1863 | int |
| 1864 | pcap_offline_filter(const struct bpf_program *fp, const struct pcap_pkthdr *h, |
| 1865 | const u_char *pkt) |
| 1866 | { |
| 1867 | const struct bpf_insn *fcode = fp->bf_insns; |
| 1868 | |
| 1869 | if (fcode != NULL) |
| 1870 | return (bpf_filter(fcode, pkt, h->len, h->caplen)); |
| 1871 | else |
| 1872 | return (0); |
| 1873 | } |
| 1874 | |
| 1875 | /* |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1876 | * We make the version string static, and return a pointer to it, rather |
| 1877 | * than exporting the version string directly. On at least some UNIXes, |
| 1878 | * if you import data from a shared library into an program, the data is |
| 1879 | * bound into the program binary, so if the string in the version of the |
| 1880 | * library with which the program was linked isn't the same as the |
| 1881 | * string in the version of the library with which the program is being |
| 1882 | * run, various undesirable things may happen (warnings, the string |
| 1883 | * being the one from the version of the library with which the program |
| 1884 | * was linked, or even weirder things, such as the string being the one |
| 1885 | * from the library but being truncated). |
| 1886 | */ |
| 1887 | #ifdef HAVE_VERSION_H |
| 1888 | #include "version.h" |
| 1889 | #else |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1890 | static const char pcap_version_string[] = "libpcap version 1.x.y"; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1891 | #endif |
| 1892 | |
| 1893 | #ifdef WIN32 |
| 1894 | /* |
| 1895 | * XXX - it'd be nice if we could somehow generate the WinPcap and libpcap |
| 1896 | * version numbers when building WinPcap. (It'd be nice to do so for |
| 1897 | * the packet.dll version number as well.) |
| 1898 | */ |
| 1899 | static const char wpcap_version_string[] = "4.0"; |
| 1900 | static const char pcap_version_string_fmt[] = |
| 1901 | "WinPcap version %s, based on %s"; |
| 1902 | static const char pcap_version_string_packet_dll_fmt[] = |
| 1903 | "WinPcap version %s (packet.dll version %s), based on %s"; |
| 1904 | static char *full_pcap_version_string; |
| 1905 | |
| 1906 | const char * |
| 1907 | pcap_lib_version(void) |
| 1908 | { |
| 1909 | char *packet_version_string; |
| 1910 | size_t full_pcap_version_string_len; |
| 1911 | |
| 1912 | if (full_pcap_version_string == NULL) { |
| 1913 | /* |
| 1914 | * Generate the version string. |
| 1915 | */ |
| 1916 | packet_version_string = PacketGetVersion(); |
| 1917 | if (strcmp(wpcap_version_string, packet_version_string) == 0) { |
| 1918 | /* |
| 1919 | * WinPcap version string and packet.dll version |
| 1920 | * string are the same; just report the WinPcap |
| 1921 | * version. |
| 1922 | */ |
| 1923 | full_pcap_version_string_len = |
| 1924 | (sizeof pcap_version_string_fmt - 4) + |
| 1925 | strlen(wpcap_version_string) + |
| 1926 | strlen(pcap_version_string); |
| 1927 | full_pcap_version_string = |
| 1928 | malloc(full_pcap_version_string_len); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1929 | if (full_pcap_version_string == NULL) |
| 1930 | return (NULL); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1931 | sprintf(full_pcap_version_string, |
| 1932 | pcap_version_string_fmt, wpcap_version_string, |
| 1933 | pcap_version_string); |
| 1934 | } else { |
| 1935 | /* |
| 1936 | * WinPcap version string and packet.dll version |
| 1937 | * string are different; that shouldn't be the |
| 1938 | * case (the two libraries should come from the |
| 1939 | * same version of WinPcap), so we report both |
| 1940 | * versions. |
| 1941 | */ |
| 1942 | full_pcap_version_string_len = |
| 1943 | (sizeof pcap_version_string_packet_dll_fmt - 6) + |
| 1944 | strlen(wpcap_version_string) + |
| 1945 | strlen(packet_version_string) + |
| 1946 | strlen(pcap_version_string); |
| 1947 | full_pcap_version_string = malloc(full_pcap_version_string_len); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1948 | if (full_pcap_version_string == NULL) |
| 1949 | return (NULL); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1950 | sprintf(full_pcap_version_string, |
| 1951 | pcap_version_string_packet_dll_fmt, |
| 1952 | wpcap_version_string, packet_version_string, |
| 1953 | pcap_version_string); |
| 1954 | } |
| 1955 | } |
| 1956 | return (full_pcap_version_string); |
| 1957 | } |
| 1958 | |
| 1959 | #elif defined(MSDOS) |
| 1960 | |
| 1961 | static char *full_pcap_version_string; |
| 1962 | |
| 1963 | const char * |
| 1964 | pcap_lib_version (void) |
| 1965 | { |
| 1966 | char *packet_version_string; |
| 1967 | size_t full_pcap_version_string_len; |
| 1968 | static char dospfx[] = "DOS-"; |
| 1969 | |
| 1970 | if (full_pcap_version_string == NULL) { |
| 1971 | /* |
| 1972 | * Generate the version string. |
| 1973 | */ |
| 1974 | full_pcap_version_string_len = |
| 1975 | sizeof dospfx + strlen(pcap_version_string); |
| 1976 | full_pcap_version_string = |
| 1977 | malloc(full_pcap_version_string_len); |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 1978 | if (full_pcap_version_string == NULL) |
| 1979 | return (NULL); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1980 | strcpy(full_pcap_version_string, dospfx); |
| 1981 | strcat(full_pcap_version_string, pcap_version_string); |
| 1982 | } |
| 1983 | return (full_pcap_version_string); |
| 1984 | } |
| 1985 | |
| 1986 | #else /* UN*X */ |
| 1987 | |
| 1988 | const char * |
| 1989 | pcap_lib_version(void) |
| 1990 | { |
| 1991 | return (pcap_version_string); |
| 1992 | } |
| 1993 | #endif |