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 #ifdef MSDOS 44 #include <fcntl.h> 45 #include <io.h> 46 #endif 47 48 #include "varattrs.h" 49 #include "fmtutils.h" 50 51 #include <stdarg.h> 52 53 #include "portability.h" 54 55 /* 56 * Version string. 57 * Uses PACKAGE_VERSION from config.h. 58 */ 59 #define PCAP_VERSION_STRING "libpcap version " PACKAGE_VERSION 60 61 #ifdef __cplusplus 62 extern "C" { 63 #endif 64 65 /* 66 * If pcap_new_api is set, we disable pcap_lookupdev(), because: 67 * 68 * it's not thread-safe, and is marked as deprecated, on all 69 * platforms; 70 * 71 * on Windows, it may return UTF-16LE strings, which the program 72 * might then pass to pcap_create() (or to pcap_open_live(), which 73 * then passes them to pcap_create()), requiring pcap_create() to 74 * check for UTF-16LE strings using a hack, and that hack 1) 75 * *cannot* be 100% reliable and 2) runs the risk of going past the 76 * end of the string. 77 * 78 * We keep it around in legacy mode for compatibility. 79 * 80 * We also disable the aforementioned hack in pcap_create(). 81 */ 82 extern int pcap_new_api; 83 84 /* 85 * If pcap_utf_8_mode is set, on Windows we treat strings as UTF-8. 86 * 87 * On UN*Xes, we assume all strings are and should be in UTF-8, regardless 88 * of the setting of this flag. 89 */ 90 extern int pcap_utf_8_mode; 91 92 /* 93 * Swap byte ordering of unsigned long long timestamp on a big endian 94 * machine. 95 */ 96 #define SWAPLL(ull) ((ull & 0xff00000000000000ULL) >> 56) | \ 97 ((ull & 0x00ff000000000000ULL) >> 40) | \ 98 ((ull & 0x0000ff0000000000ULL) >> 24) | \ 99 ((ull & 0x000000ff00000000ULL) >> 8) | \ 100 ((ull & 0x00000000ff000000ULL) << 8) | \ 101 ((ull & 0x0000000000ff0000ULL) << 24) | \ 102 ((ull & 0x000000000000ff00ULL) << 40) | \ 103 ((ull & 0x00000000000000ffULL) << 56) 104 105 /* 106 * Maximum snapshot length. 107 * 108 * Somewhat arbitrary, but chosen to be: 109 * 110 * 1) big enough for maximum-size Linux loopback packets (65549) 111 * and some USB packets captured with USBPcap: 112 * 113 * https://desowin.org/usbpcap/ 114 * 115 * (> 131072, < 262144) 116 * 117 * and 118 * 119 * 2) small enough not to cause attempts to allocate huge amounts of 120 * memory; some applications might use the snapshot length in a 121 * savefile header to control the size of the buffer they allocate, 122 * so a size of, say, 2^31-1 might not work well. (libpcap uses it 123 * as a hint, but doesn't start out allocating a buffer bigger than 124 * 2 KiB, and grows the buffer as necessary, but not beyond the 125 * per-linktype maximum snapshot length. Other code might naively 126 * use it; we want to avoid writing a too-large snapshot length, 127 * in order not to cause that code problems.) 128 * 129 * We don't enforce this in pcap_set_snaplen(), but we use it internally. 130 */ 131 #define MAXIMUM_SNAPLEN 262144 132 133 /* 134 * Locale-independent macros for testing character types. 135 * These can be passed any integral value, without worrying about, for 136 * example, sign-extending char values, unlike the C macros. 137 */ 138 #define PCAP_ISDIGIT(c) \ 139 ((c) >= '0' && (c) <= '9') 140 #define PCAP_ISXDIGIT(c) \ 141 (((c) >= '0' && (c) <= '9') || \ 142 ((c) >= 'A' && (c) <= 'F') || \ 143 ((c) >= 'a' && (c) <= 'f')) 144 145 struct pcap_opt { 146 char *device; 147 int timeout; /* timeout for buffering */ 148 u_int buffer_size; 149 int promisc; 150 int rfmon; /* monitor mode */ 151 int immediate; /* immediate mode - deliver packets as soon as they arrive */ 152 int nonblock; /* non-blocking mode - don't wait for packets to be delivered, return "no packets available" */ 153 int tstamp_type; 154 int tstamp_precision; 155 156 /* 157 * Platform-dependent options. 158 */ 159 #ifdef __linux__ 160 int protocol; /* protocol to use when creating PF_PACKET socket */ 161 #endif 162 #ifdef _WIN32 163 int nocapture_local;/* disable NPF loopback */ 164 #endif 165 }; 166 167 typedef int (*activate_op_t)(pcap_t *); 168 typedef int (*can_set_rfmon_op_t)(pcap_t *); 169 typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *); 170 typedef int (*next_packet_op_t)(pcap_t *, struct pcap_pkthdr *, u_char **); 171 typedef int (*inject_op_t)(pcap_t *, const void *, int); 172 typedef void (*save_current_filter_op_t)(pcap_t *, const char *); 173 typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *); 174 typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t); 175 typedef int (*set_datalink_op_t)(pcap_t *, int); 176 typedef int (*getnonblock_op_t)(pcap_t *); 177 typedef int (*setnonblock_op_t)(pcap_t *, int); 178 typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *); 179 typedef void (*breakloop_op_t)(pcap_t *); 180 #ifdef _WIN32 181 typedef struct pcap_stat *(*stats_ex_op_t)(pcap_t *, int *); 182 typedef int (*setbuff_op_t)(pcap_t *, int); 183 typedef int (*setmode_op_t)(pcap_t *, int); 184 typedef int (*setmintocopy_op_t)(pcap_t *, int); 185 typedef HANDLE (*getevent_op_t)(pcap_t *); 186 typedef int (*oid_get_request_op_t)(pcap_t *, bpf_u_int32, void *, size_t *); 187 typedef int (*oid_set_request_op_t)(pcap_t *, bpf_u_int32, const void *, size_t *); 188 typedef u_int (*sendqueue_transmit_op_t)(pcap_t *, pcap_send_queue *, int); 189 typedef int (*setuserbuffer_op_t)(pcap_t *, int); 190 typedef int (*live_dump_op_t)(pcap_t *, char *, int, int); 191 typedef int (*live_dump_ended_op_t)(pcap_t *, int); 192 typedef PAirpcapHandle (*get_airpcap_handle_op_t)(pcap_t *); 193 #endif 194 typedef void (*cleanup_op_t)(pcap_t *); 195 196 /* 197 * We put all the stuff used in the read code path at the beginning, 198 * to try to keep it together in the same cache line or lines. 199 */ 200 struct pcap { 201 /* 202 * Method to call to read packets on a live capture. 203 */ 204 read_op_t read_op; 205 206 /* 207 * Method to call to read the next packet from a savefile. 208 */ 209 next_packet_op_t next_packet_op; 210 211 #ifdef _WIN32 212 HANDLE handle; 213 #else 214 int fd; 215 #endif /* _WIN32 */ 216 217 /* 218 * Read buffer. 219 */ 220 u_int bufsize; 221 void *buffer; 222 u_char *bp; 223 int cc; 224 225 sig_atomic_t break_loop; /* flag set to force break from packet-reading loop */ 226 227 void *priv; /* private data for methods */ 228 229 #ifdef ENABLE_REMOTE 230 struct pcap_samp rmt_samp; /* parameters related to the sampling process. */ 231 #endif 232 233 int swapped; 234 FILE *rfile; /* null if live capture, non-null if savefile */ 235 u_int fddipad; 236 struct pcap *next; /* list of open pcaps that need stuff cleared on close */ 237 238 /* 239 * File version number; meaningful only for a savefile, but we 240 * keep it here so that apps that (mistakenly) ask for the 241 * version numbers will get the same zero values that they 242 * always did. 243 */ 244 int version_major; 245 int version_minor; 246 247 int snapshot; 248 int linktype; /* Network linktype */ 249 int linktype_ext; /* Extended information stored in the linktype field of a file */ 250 int offset; /* offset for proper alignment */ 251 int activated; /* true if the capture is really started */ 252 int oldstyle; /* if we're opening with pcap_open_live() */ 253 254 struct pcap_opt opt; 255 256 /* 257 * Place holder for pcap_next(). 258 */ 259 u_char *pkt; 260 261 #ifdef _WIN32 262 struct pcap_stat stat; /* used for pcap_stats_ex() */ 263 #endif 264 265 /* We're accepting only packets in this direction/these directions. */ 266 pcap_direction_t direction; 267 268 /* 269 * Flags to affect BPF code generation. 270 */ 271 int bpf_codegen_flags; 272 273 #if !defined(_WIN32) && !defined(MSDOS) 274 int selectable_fd; /* FD on which select()/poll()/epoll_wait()/kevent()/etc. can be done */ 275 276 /* 277 * In case there either is no selectable FD, or there is but 278 * it doesn't necessarily work (e.g., if it doesn't get notified 279 * if the packet capture timeout expires before the buffer 280 * fills up), this points to a timeout that should be used 281 * in select()/poll()/epoll_wait()/kevent() call. The pcap_t should 282 * be put into non-blocking mode, and, if the timeout expires on 283 * the call, an attempt should be made to read packets from all 284 * pcap_t's with a required timeout, and the code must be 285 * prepared not to see any packets from the attempt. 286 */ 287 const struct timeval *required_select_timeout; 288 #endif 289 290 /* 291 * Placeholder for filter code if bpf not in kernel. 292 */ 293 struct bpf_program fcode; 294 295 char errbuf[PCAP_ERRBUF_SIZE + 1]; 296 #ifdef _WIN32 297 char acp_errbuf[PCAP_ERRBUF_SIZE + 1]; /* buffer for local code page error strings */ 298 #endif 299 int dlt_count; 300 u_int *dlt_list; 301 int tstamp_type_count; 302 u_int *tstamp_type_list; 303 int tstamp_precision_count; 304 u_int *tstamp_precision_list; 305 306 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 307 308 /* 309 * More methods. 310 */ 311 activate_op_t activate_op; 312 can_set_rfmon_op_t can_set_rfmon_op; 313 inject_op_t inject_op; 314 save_current_filter_op_t save_current_filter_op; 315 setfilter_op_t setfilter_op; 316 setdirection_op_t setdirection_op; 317 set_datalink_op_t set_datalink_op; 318 getnonblock_op_t getnonblock_op; 319 setnonblock_op_t setnonblock_op; 320 stats_op_t stats_op; 321 breakloop_op_t breakloop_op; 322 323 /* 324 * Routine to use as callback for pcap_next()/pcap_next_ex(). 325 */ 326 pcap_handler oneshot_callback; 327 328 #ifdef _WIN32 329 /* 330 * These are, at least currently, specific to the Win32 NPF 331 * driver. 332 */ 333 stats_ex_op_t stats_ex_op; 334 setbuff_op_t setbuff_op; 335 setmode_op_t setmode_op; 336 setmintocopy_op_t setmintocopy_op; 337 getevent_op_t getevent_op; 338 oid_get_request_op_t oid_get_request_op; 339 oid_set_request_op_t oid_set_request_op; 340 sendqueue_transmit_op_t sendqueue_transmit_op; 341 setuserbuffer_op_t setuserbuffer_op; 342 live_dump_op_t live_dump_op; 343 live_dump_ended_op_t live_dump_ended_op; 344 get_airpcap_handle_op_t get_airpcap_handle_op; 345 #endif 346 cleanup_op_t cleanup_op; 347 }; 348 349 /* 350 * BPF code generation flags. 351 */ 352 #define BPF_SPECIAL_VLAN_HANDLING 0x00000001 /* special VLAN handling for Linux */ 353 354 /* 355 * This is a timeval as stored in a savefile. 356 * It has to use the same types everywhere, independent of the actual 357 * `struct timeval'; `struct timeval' has 32-bit tv_sec values on some 358 * platforms and 64-bit tv_sec values on other platforms, and writing 359 * out native `struct timeval' values would mean files could only be 360 * read on systems with the same tv_sec size as the system on which 361 * the file was written. 362 */ 363 364 struct pcap_timeval { 365 bpf_int32 tv_sec; /* seconds */ 366 bpf_int32 tv_usec; /* microseconds */ 367 }; 368 369 /* 370 * This is a `pcap_pkthdr' as actually stored in a savefile. 371 * 372 * Do not change the format of this structure, in any way (this includes 373 * changes that only affect the length of fields in this structure), 374 * and do not make the time stamp anything other than seconds and 375 * microseconds (e.g., seconds and nanoseconds). Instead: 376 * 377 * introduce a new structure for the new format; 378 * 379 * send mail to "tcpdump-workers@lists.tcpdump.org", requesting 380 * a new magic number for your new capture file format, and, when 381 * you get the new magic number, put it in "savefile.c"; 382 * 383 * use that magic number for save files with the changed record 384 * header; 385 * 386 * make the code in "savefile.c" capable of reading files with 387 * the old record header as well as files with the new record header 388 * (using the magic number to determine the header format). 389 * 390 * Then supply the changes by forking the branch at 391 * 392 * https://github.com/the-tcpdump-group/libpcap/tree/master 393 * 394 * and issuing a pull request, so that future versions of libpcap and 395 * programs that use it (such as tcpdump) will be able to read your new 396 * capture file format. 397 */ 398 399 struct pcap_sf_pkthdr { 400 struct pcap_timeval ts; /* time stamp */ 401 bpf_u_int32 caplen; /* length of portion present */ 402 bpf_u_int32 len; /* length of this packet (off wire) */ 403 }; 404 405 /* 406 * How a `pcap_pkthdr' is actually stored in savefiles written 407 * by some patched versions of libpcap (e.g. the ones in Red 408 * Hat Linux 6.1 and 6.2). 409 * 410 * Do not change the format of this structure, in any way (this includes 411 * changes that only affect the length of fields in this structure). 412 * Instead, introduce a new structure, as per the above. 413 */ 414 415 struct pcap_sf_patched_pkthdr { 416 struct pcap_timeval ts; /* time stamp */ 417 bpf_u_int32 caplen; /* length of portion present */ 418 bpf_u_int32 len; /* length of this packet (off wire) */ 419 int index; 420 unsigned short protocol; 421 unsigned char pkt_type; 422 }; 423 424 /* 425 * User data structure for the one-shot callback used for pcap_next() 426 * and pcap_next_ex(). 427 */ 428 struct oneshot_userdata { 429 struct pcap_pkthdr *hdr; 430 const u_char **pkt; 431 pcap_t *pd; 432 }; 433 434 #ifndef min 435 #define min(a, b) ((a) > (b) ? (b) : (a)) 436 #endif 437 438 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 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 pcap_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 pcap_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