1 /* 2 * Copyright (c) 1994, 1995, 1996 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 pcap_int_h 35 #define pcap_int_h 36 37 #include <stddef.h> 38 39 #include <signal.h> 40 41 #include <pcap/pcap.h> 42 43 #include "varattrs.h" 44 #include "fmtutils.h" 45 46 /* 47 * Version string. 48 * Uses PACKAGE_VERSION from config.h. 49 */ 50 #define PCAP_VERSION_STRING "libpcap version " PACKAGE_VERSION 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 /* 57 * If pcap_new_api is set, we disable pcap_lookupdev(), because: 58 * 59 * it's not thread-safe, and is marked as deprecated, on all 60 * platforms; 61 * 62 * on Windows, it may return UTF-16LE strings, which the program 63 * might then pass to pcap_create() (or to pcap_open_live(), which 64 * then passes them to pcap_create()), requiring pcap_create() to 65 * check for UTF-16LE strings using a hack, and that hack 1) 66 * *cannot* be 100% reliable and 2) runs the risk of going past the 67 * end of the string. 68 * 69 * We keep it around in legacy mode for compatibility. 70 * 71 * We also disable the aforementioned hack in pcap_create(). 72 */ 73 extern int pcap_new_api; 74 75 /* 76 * If pcap_utf_8_mode is set, on Windows we treat strings as UTF-8. 77 * 78 * On UN*Xes, we assume all strings are and should be in UTF-8, regardless 79 * of the setting of this flag. 80 */ 81 extern int pcap_utf_8_mode; 82 83 #ifdef MSDOS 84 #include <fcntl.h> 85 #include <io.h> 86 #endif 87 88 /* 89 * Swap byte ordering of unsigned long long timestamp on a big endian 90 * machine. 91 */ 92 #define SWAPLL(ull) ((ull & 0xff00000000000000ULL) >> 56) | \ 93 ((ull & 0x00ff000000000000ULL) >> 40) | \ 94 ((ull & 0x0000ff0000000000ULL) >> 24) | \ 95 ((ull & 0x000000ff00000000ULL) >> 8) | \ 96 ((ull & 0x00000000ff000000ULL) << 8) | \ 97 ((ull & 0x0000000000ff0000ULL) << 24) | \ 98 ((ull & 0x000000000000ff00ULL) << 40) | \ 99 ((ull & 0x00000000000000ffULL) << 56) 100 101 /* 102 * Maximum snapshot length. 103 * 104 * Somewhat arbitrary, but chosen to be: 105 * 106 * 1) big enough for maximum-size Linux loopback packets (65549) 107 * and some USB packets captured with USBPcap: 108 * 109 * https://desowin.org/usbpcap/ 110 * 111 * (> 131072, < 262144) 112 * 113 * and 114 * 115 * 2) small enough not to cause attempts to allocate huge amounts of 116 * memory; some applications might use the snapshot length in a 117 * savefile header to control the size of the buffer they allocate, 118 * so a size of, say, 2^31-1 might not work well. (libpcap uses it 119 * as a hint, but doesn't start out allocating a buffer bigger than 120 * 2 KiB, and grows the buffer as necessary, but not beyond the 121 * per-linktype maximum snapshot length. Other code might naively 122 * use it; we want to avoid writing a too-large snapshot length, 123 * in order not to cause that code problems.) 124 * 125 * We don't enforce this in pcap_set_snaplen(), but we use it internally. 126 */ 127 #define MAXIMUM_SNAPLEN 262144 128 129 /* 130 * Locale-independent macros for testing character types. 131 * These can be passed any integral value, without worrying about, for 132 * example, sign-extending char values, unlike the C macros. 133 */ 134 #define PCAP_ISDIGIT(c) \ 135 ((c) >= '0' && (c) <= '9') 136 #define PCAP_ISXDIGIT(c) \ 137 (((c) >= '0' && (c) <= '9') || \ 138 ((c) >= 'A' && (c) <= 'F') || \ 139 ((c) >= 'a' && (c) <= 'f')) 140 141 struct pcap_opt { 142 char *device; 143 int timeout; /* timeout for buffering */ 144 u_int buffer_size; 145 int promisc; 146 int rfmon; /* monitor mode */ 147 int immediate; /* immediate mode - deliver packets as soon as they arrive */ 148 int nonblock; /* non-blocking mode - don't wait for packets to be delivered, return "no packets available" */ 149 int tstamp_type; 150 int tstamp_precision; 151 152 /* 153 * Platform-dependent options. 154 */ 155 #ifdef __linux__ 156 int protocol; /* protocol to use when creating PF_PACKET socket */ 157 #endif 158 #ifdef _WIN32 159 int nocapture_local;/* disable NPF loopback */ 160 #endif 161 }; 162 163 typedef int (*activate_op_t)(pcap_t *); 164 typedef int (*can_set_rfmon_op_t)(pcap_t *); 165 typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *); 166 typedef int (*next_packet_op_t)(pcap_t *, struct pcap_pkthdr *, u_char **); 167 typedef int (*inject_op_t)(pcap_t *, const void *, int); 168 typedef void (*save_current_filter_op_t)(pcap_t *, const char *); 169 typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *); 170 typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t); 171 typedef int (*set_datalink_op_t)(pcap_t *, int); 172 typedef int (*getnonblock_op_t)(pcap_t *); 173 typedef int (*setnonblock_op_t)(pcap_t *, int); 174 typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *); 175 typedef void (*breakloop_op_t)(pcap_t *); 176 #ifdef _WIN32 177 typedef struct pcap_stat *(*stats_ex_op_t)(pcap_t *, int *); 178 typedef int (*setbuff_op_t)(pcap_t *, int); 179 typedef int (*setmode_op_t)(pcap_t *, int); 180 typedef int (*setmintocopy_op_t)(pcap_t *, int); 181 typedef HANDLE (*getevent_op_t)(pcap_t *); 182 typedef int (*oid_get_request_op_t)(pcap_t *, bpf_u_int32, void *, size_t *); 183 typedef int (*oid_set_request_op_t)(pcap_t *, bpf_u_int32, const void *, size_t *); 184 typedef u_int (*sendqueue_transmit_op_t)(pcap_t *, pcap_send_queue *, int); 185 typedef int (*setuserbuffer_op_t)(pcap_t *, int); 186 typedef int (*live_dump_op_t)(pcap_t *, char *, int, int); 187 typedef int (*live_dump_ended_op_t)(pcap_t *, int); 188 typedef PAirpcapHandle (*get_airpcap_handle_op_t)(pcap_t *); 189 #endif 190 typedef void (*cleanup_op_t)(pcap_t *); 191 192 /* 193 * We put all the stuff used in the read code path at the beginning, 194 * to try to keep it together in the same cache line or lines. 195 */ 196 struct pcap { 197 /* 198 * Method to call to read packets on a live capture. 199 */ 200 read_op_t read_op; 201 202 /* 203 * Method to call to read the next packet from a savefile. 204 */ 205 next_packet_op_t next_packet_op; 206 207 #ifdef _WIN32 208 HANDLE handle; 209 #else 210 int fd; 211 #endif /* _WIN32 */ 212 213 /* 214 * Read buffer. 215 */ 216 u_int bufsize; 217 void *buffer; 218 u_char *bp; 219 int cc; 220 221 sig_atomic_t break_loop; /* flag set to force break from packet-reading loop */ 222 223 void *priv; /* private data for methods */ 224 225 #ifdef ENABLE_REMOTE 226 struct pcap_samp rmt_samp; /* parameters related to the sampling process. */ 227 #endif 228 229 int swapped; 230 FILE *rfile; /* null if live capture, non-null if savefile */ 231 u_int fddipad; 232 struct pcap *next; /* list of open pcaps that need stuff cleared on close */ 233 234 /* 235 * File version number; meaningful only for a savefile, but we 236 * keep it here so that apps that (mistakenly) ask for the 237 * version numbers will get the same zero values that they 238 * always did. 239 */ 240 int version_major; 241 int version_minor; 242 243 int snapshot; 244 int linktype; /* Network linktype */ 245 int linktype_ext; /* Extended information stored in the linktype field of a file */ 246 int offset; /* offset for proper alignment */ 247 int activated; /* true if the capture is really started */ 248 int oldstyle; /* if we're opening with pcap_open_live() */ 249 250 struct pcap_opt opt; 251 252 /* 253 * Place holder for pcap_next(). 254 */ 255 u_char *pkt; 256 257 #ifdef _WIN32 258 struct pcap_stat stat; /* used for pcap_stats_ex() */ 259 #endif 260 261 /* We're accepting only packets in this direction/these directions. */ 262 pcap_direction_t direction; 263 264 /* 265 * Flags to affect BPF code generation. 266 */ 267 int bpf_codegen_flags; 268 269 #if !defined(_WIN32) && !defined(MSDOS) 270 int selectable_fd; /* FD on which select()/poll()/epoll_wait()/kevent()/etc. can be done */ 271 272 /* 273 * In case there either is no selectable FD, or there is but 274 * it doesn't necessarily work (e.g., if it doesn't get notified 275 * if the packet capture timeout expires before the buffer 276 * fills up), this points to a timeout that should be used 277 * in select()/poll()/epoll_wait()/kevent() call. The pcap_t should 278 * be put into non-blocking mode, and, if the timeout expires on 279 * the call, an attempt should be made to read packets from all 280 * pcap_t's with a required timeout, and the code must be 281 * prepared not to see any packets from the attempt. 282 */ 283 const struct timeval *required_select_timeout; 284 #endif 285 286 /* 287 * Placeholder for filter code if bpf not in kernel. 288 */ 289 struct bpf_program fcode; 290 291 char errbuf[PCAP_ERRBUF_SIZE + 1]; 292 #ifdef _WIN32 293 char acp_errbuf[PCAP_ERRBUF_SIZE + 1]; /* buffer for local code page error strings */ 294 #endif 295 int dlt_count; 296 u_int *dlt_list; 297 int tstamp_type_count; 298 u_int *tstamp_type_list; 299 int tstamp_precision_count; 300 u_int *tstamp_precision_list; 301 302 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 303 304 /* 305 * More methods. 306 */ 307 activate_op_t activate_op; 308 can_set_rfmon_op_t can_set_rfmon_op; 309 inject_op_t inject_op; 310 save_current_filter_op_t save_current_filter_op; 311 setfilter_op_t setfilter_op; 312 setdirection_op_t setdirection_op; 313 set_datalink_op_t set_datalink_op; 314 getnonblock_op_t getnonblock_op; 315 setnonblock_op_t setnonblock_op; 316 stats_op_t stats_op; 317 breakloop_op_t breakloop_op; 318 319 /* 320 * Routine to use as callback for pcap_next()/pcap_next_ex(). 321 */ 322 pcap_handler oneshot_callback; 323 324 #ifdef _WIN32 325 /* 326 * These are, at least currently, specific to the Win32 NPF 327 * driver. 328 */ 329 stats_ex_op_t stats_ex_op; 330 setbuff_op_t setbuff_op; 331 setmode_op_t setmode_op; 332 setmintocopy_op_t setmintocopy_op; 333 getevent_op_t getevent_op; 334 oid_get_request_op_t oid_get_request_op; 335 oid_set_request_op_t oid_set_request_op; 336 sendqueue_transmit_op_t sendqueue_transmit_op; 337 setuserbuffer_op_t setuserbuffer_op; 338 live_dump_op_t live_dump_op; 339 live_dump_ended_op_t live_dump_ended_op; 340 get_airpcap_handle_op_t get_airpcap_handle_op; 341 #endif 342 cleanup_op_t cleanup_op; 343 }; 344 345 /* 346 * BPF code generation flags. 347 */ 348 #define BPF_SPECIAL_VLAN_HANDLING 0x00000001 /* special VLAN handling for Linux */ 349 350 /* 351 * This is a timeval as stored in a savefile. 352 * It has to use the same types everywhere, independent of the actual 353 * `struct timeval'; `struct timeval' has 32-bit tv_sec values on some 354 * platforms and 64-bit tv_sec values on other platforms, and writing 355 * out native `struct timeval' values would mean files could only be 356 * read on systems with the same tv_sec size as the system on which 357 * the file was written. 358 */ 359 360 struct pcap_timeval { 361 bpf_int32 tv_sec; /* seconds */ 362 bpf_int32 tv_usec; /* microseconds */ 363 }; 364 365 /* 366 * This is a `pcap_pkthdr' as actually stored in a savefile. 367 * 368 * Do not change the format of this structure, in any way (this includes 369 * changes that only affect the length of fields in this structure), 370 * and do not make the time stamp anything other than seconds and 371 * microseconds (e.g., seconds and nanoseconds). Instead: 372 * 373 * introduce a new structure for the new format; 374 * 375 * send mail to "tcpdump-workers@lists.tcpdump.org", requesting 376 * a new magic number for your new capture file format, and, when 377 * you get the new magic number, put it in "savefile.c"; 378 * 379 * use that magic number for save files with the changed record 380 * header; 381 * 382 * make the code in "savefile.c" capable of reading files with 383 * the old record header as well as files with the new record header 384 * (using the magic number to determine the header format). 385 * 386 * Then supply the changes by forking the branch at 387 * 388 * https://github.com/the-tcpdump-group/libpcap/tree/master 389 * 390 * and issuing a pull request, so that future versions of libpcap and 391 * programs that use it (such as tcpdump) will be able to read your new 392 * capture file format. 393 */ 394 395 struct pcap_sf_pkthdr { 396 struct pcap_timeval ts; /* time stamp */ 397 bpf_u_int32 caplen; /* length of portion present */ 398 bpf_u_int32 len; /* length of this packet (off wire) */ 399 }; 400 401 /* 402 * How a `pcap_pkthdr' is actually stored in savefiles written 403 * by some patched versions of libpcap (e.g. the ones in Red 404 * Hat Linux 6.1 and 6.2). 405 * 406 * Do not change the format of this structure, in any way (this includes 407 * changes that only affect the length of fields in this structure). 408 * Instead, introduce a new structure, as per the above. 409 */ 410 411 struct pcap_sf_patched_pkthdr { 412 struct pcap_timeval ts; /* time stamp */ 413 bpf_u_int32 caplen; /* length of portion present */ 414 bpf_u_int32 len; /* length of this packet (off wire) */ 415 int index; 416 unsigned short protocol; 417 unsigned char pkt_type; 418 }; 419 420 /* 421 * User data structure for the one-shot callback used for pcap_next() 422 * and pcap_next_ex(). 423 */ 424 struct oneshot_userdata { 425 struct pcap_pkthdr *hdr; 426 const u_char **pkt; 427 pcap_t *pd; 428 }; 429 430 #ifndef min 431 #define min(a, b) ((a) > (b) ? (b) : (a)) 432 #endif 433 434 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 435 436 #include <stdarg.h> 437 438 #include "portability.h" 439 440 /* 441 * Does the packet count argument to a module's read routine say 442 * "supply packets until you run out of packets"? 443 */ 444 #define PACKET_COUNT_IS_UNLIMITED(count) ((count) <= 0) 445 446 /* 447 * Routines that most pcap implementations can use for non-blocking mode. 448 */ 449 #if !defined(_WIN32) && !defined(MSDOS) 450 int pcap_getnonblock_fd(pcap_t *); 451 int pcap_setnonblock_fd(pcap_t *p, int); 452 #endif 453 454 /* 455 * Internal interfaces for "pcap_create()". 456 * 457 * "pcap_create_interface()" is the routine to do a pcap_create on 458 * a regular network interface. There are multiple implementations 459 * of this, one for each platform type (Linux, BPF, DLPI, etc.), 460 * with the one used chosen by the configure script. 461 * 462 * "pcap_create_common()" allocates and fills in a pcap_t, for use 463 * by pcap_create routines. 464 */ 465 pcap_t *pcap_create_interface(const char *, char *); 466 467 /* 468 * This wrapper takes an error buffer pointer and a type to use for the 469 * private data, and calls pcap_create_common(), passing it the error 470 * buffer pointer, the size fo the private data type, in bytes, and the 471 * offset of the private data from the beginning of the structure, in 472 * bytes. 473 */ 474 #define PCAP_CREATE_COMMON(ebuf, type) \ 475 pcap_create_common(ebuf, \ 476 sizeof (struct { pcap_t __common; type __private; }), \ 477 offsetof (struct { pcap_t __common; type __private; }, __private)) 478 pcap_t *pcap_create_common(char *, size_t, size_t); 479 int pcap_do_addexit(pcap_t *); 480 void pcap_add_to_pcaps_to_close(pcap_t *); 481 void pcap_remove_from_pcaps_to_close(pcap_t *); 482 void pcap_cleanup_live_common(pcap_t *); 483 int pcap_check_activated(pcap_t *); 484 void pcap_breakloop_common(pcap_t *); 485 486 /* 487 * Internal interfaces for "pcap_findalldevs()". 488 * 489 * A pcap_if_list_t * is a reference to a list of devices. 490 * 491 * A get_if_flags_func is a platform-dependent function called to get 492 * additional interface flags. 493 * 494 * "pcap_platform_finddevs()" is the platform-dependent routine to 495 * find local network interfaces. 496 * 497 * "pcap_findalldevs_interfaces()" is a helper to find those interfaces 498 * using the "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.). 499 * 500 * "add_dev()" adds an entry to a pcap_if_list_t. 501 * 502 * "find_dev()" tries to find a device, by name, in a pcap_if_list_t. 503 * 504 * "find_or_add_dev()" checks whether a device is already in a pcap_if_list_t 505 * and, if not, adds an entry for it. 506 */ 507 struct pcap_if_list; 508 typedef struct pcap_if_list pcap_if_list_t; 509 typedef int (*get_if_flags_func)(const char *, bpf_u_int32 *, char *); 510 int pcap_platform_finddevs(pcap_if_list_t *, char *); 511 #if !defined(_WIN32) && !defined(MSDOS) 512 int pcap_findalldevs_interfaces(pcap_if_list_t *, char *, 513 int (*)(const char *), get_if_flags_func); 514 #endif 515 pcap_if_t *find_or_add_dev(pcap_if_list_t *, const char *, bpf_u_int32, 516 get_if_flags_func, const char *, char *); 517 pcap_if_t *find_dev(pcap_if_list_t *, const char *); 518 pcap_if_t *add_dev(pcap_if_list_t *, const char *, bpf_u_int32, const char *, 519 char *); 520 int add_addr_to_dev(pcap_if_t *, struct sockaddr *, size_t, 521 struct sockaddr *, size_t, struct sockaddr *, size_t, 522 struct sockaddr *dstaddr, size_t, char *errbuf); 523 #ifndef _WIN32 524 pcap_if_t *find_or_add_if(pcap_if_list_t *, const char *, bpf_u_int32, 525 get_if_flags_func, char *); 526 int add_addr_to_if(pcap_if_list_t *, const char *, bpf_u_int32, 527 get_if_flags_func, 528 struct sockaddr *, size_t, struct sockaddr *, size_t, 529 struct sockaddr *, size_t, struct sockaddr *, size_t, char *); 530 #endif 531 532 /* 533 * Internal interfaces for "pcap_open_offline()" and other savefile 534 * I/O routines. 535 * 536 * "pcap_open_offline_common()" allocates and fills in a pcap_t, for use 537 * by pcap_open_offline routines. 538 * 539 * "pcap_adjust_snapshot()" adjusts the snapshot to be non-zero and 540 * fit within an int. 541 * 542 * "sf_cleanup()" closes the file handle associated with a pcap_t, if 543 * appropriate, and frees all data common to all modules for handling 544 * savefile types. 545 * 546 * "charset_fopen()", in UTF-8 mode on Windows, does an fopen() that 547 * treats the pathname as being in UTF-8, rather than the local 548 * code page, on Windows. 549 */ 550 551 /* 552 * This wrapper takes an error buffer pointer and a type to use for the 553 * private data, and calls pcap_create_common(), passing it the error 554 * buffer pointer, the size fo the private data type, in bytes, and the 555 * offset of the private data from the beginning of the structure, in 556 * bytes. 557 */ 558 #define PCAP_OPEN_OFFLINE_COMMON(ebuf, type) \ 559 pcap_open_offline_common(ebuf, \ 560 sizeof (struct { pcap_t __common; type __private; }), \ 561 offsetof (struct { pcap_t __common; type __private; }, __private)) 562 pcap_t *pcap_open_offline_common(char *ebuf, size_t total_size, 563 size_t private_data); 564 bpf_u_int32 pcap_adjust_snapshot(bpf_u_int32 linktype, bpf_u_int32 snaplen); 565 void sf_cleanup(pcap_t *p); 566 #ifdef _WIN32 567 FILE *charset_fopen(const char *path, const char *mode); 568 #else 569 /* 570 * On other OSes, just use Boring Old fopen(). 571 */ 572 #define charset_fopen(path, mode) fopen((path), (mode)) 573 #endif 574 575 /* 576 * Internal interfaces for loading code at run time. 577 */ 578 #ifdef _WIN32 579 #define pcap_code_handle_t HMODULE 580 #define pcap_funcptr_t FARPROC 581 582 pcap_code_handle_t pcap_load_code(const char *); 583 pcap_funcptr_t pcap_find_function(pcap_code_handle_t, const char *); 584 #endif 585 586 /* 587 * Internal interfaces for doing user-mode filtering of packets and 588 * validating filter programs. 589 */ 590 /* 591 * Auxiliary data, for use when interpreting a filter intended for the 592 * Linux kernel when the kernel rejects the filter (requiring us to 593 * run it in userland). It contains VLAN tag information. 594 */ 595 struct bpf_aux_data { 596 u_short vlan_tag_present; 597 u_short vlan_tag; 598 }; 599 600 /* 601 * Filtering routine that takes the auxiliary data as an additional 602 * argument. 603 */ 604 u_int pcap_filter_with_aux_data(const struct bpf_insn *, 605 const u_char *, u_int, u_int, const struct bpf_aux_data *); 606 607 /* 608 * Filtering routine that doesn't. 609 */ 610 u_int pcap_filter(const struct bpf_insn *, const u_char *, u_int, u_int); 611 612 /* 613 * Routine to validate a BPF program. 614 */ 615 int pcap_validate_filter(const struct bpf_insn *, int); 616 617 /* 618 * Internal interfaces for both "pcap_create()" and routines that 619 * open savefiles. 620 * 621 * "pcap_oneshot()" is the standard one-shot callback for "pcap_next()" 622 * and "pcap_next_ex()". 623 */ 624 void pcap_oneshot(u_char *, const struct pcap_pkthdr *, const u_char *); 625 626 int install_bpf_program(pcap_t *, struct bpf_program *); 627 628 int pcap_strcasecmp(const char *, const char *); 629 630 /* 631 * Internal interfaces for pcap_createsrcstr and pcap_parsesrcstr with 632 * the additional bit of information regarding SSL support (rpcap:// vs. 633 * rpcaps://). 634 */ 635 int pcap_createsrcstr_ex(char *, int, const char *, const char *, 636 const char *, unsigned char, char *); 637 int pcap_parsesrcstr_ex(const char *, int *, char *, char *, 638 char *, unsigned char *, char *); 639 640 #ifdef YYDEBUG 641 extern int pcap_debug; 642 #endif 643 644 #ifdef __cplusplus 645 } 646 #endif 647 648 #endif 649