1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ 2 /* 3 * Copyright (c) 1993, 1994, 1995, 1996, 1997 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the Computer Systems 17 * Engineering Group at Lawrence Berkeley Laboratory. 18 * 4. Neither the name of the University nor of the Laboratory may be used 19 * to endorse or promote products derived from this software without 20 * specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Remote packet capture mechanisms and extensions from WinPcap: 37 * 38 * Copyright (c) 2002 - 2003 39 * NetGroup, Politecnico di Torino (Italy) 40 * All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the Politecnico di Torino nor the names of its 52 * contributors may be used to endorse or promote products derived from 53 * this software without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 56 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 57 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 58 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 59 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 60 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 61 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 65 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 * 67 */ 68 69 #ifndef lib_pcap_pcap_h 70 #define lib_pcap_pcap_h 71 72 /* 73 * Some software that uses libpcap/WinPcap/Npcap defines _MSC_VER before 74 * including pcap.h if it's not defined - and it defines it to 1500. 75 * (I'm looking at *you*, lwIP!) 76 * 77 * Attempt to detect this, and undefine _MSC_VER so that we can *reliably* 78 * use it to know what compiler is being used and, if it's Visual Studio, 79 * what version is being used. 80 */ 81 #if defined(_MSC_VER) 82 /* 83 * We assume here that software such as that doesn't define _MSC_FULL_VER 84 * as well and that it defines _MSC_VER with a value > 1200. 85 * 86 * DO NOT BREAK THESE ASSUMPTIONS. IF YOU FEEL YOU MUST DEFINE _MSC_VER 87 * WITH A COMPILER THAT'S NOT MICROSOFT'S C COMPILER, PLEASE CONTACT 88 * US SO THAT WE CAN MAKE IT SO THAT YOU DON'T HAVE TO DO THAT. THANK 89 * YOU. 90 * 91 * OK, is _MSC_FULL_VER defined? 92 */ 93 #if !defined(_MSC_FULL_VER) 94 /* 95 * According to 96 * 97 * https://sourceforge.net/p/predef/wiki/Compilers/ 98 * 99 * with "Visual C++ 6.0 Processor Pack"/Visual C++ 6.0 SP6 and 100 * later, _MSC_FULL_VER is defined, so either this is an older 101 * version of Visual C++ or it's not Visual C++ at all. 102 * 103 * For Visual C++ 6.0, _MSC_VER is defined as 1200. 104 */ 105 #if _MSC_VER > 1200 106 /* 107 * If this is Visual C++, _MSC_FULL_VER should be defined, so we 108 * assume this isn't Visual C++, and undo the lie that it is. 109 */ 110 #undef _MSC_VER 111 #endif 112 #endif 113 #endif 114 115 #include <pcap/funcattrs.h> 116 117 #include <pcap/pcap-inttypes.h> 118 119 #if defined(_WIN32) 120 #include <winsock2.h> /* u_int, u_char etc. */ 121 #include <io.h> /* _get_osfhandle() */ 122 #elif defined(MSDOS) 123 #include <sys/types.h> /* u_int, u_char etc. */ 124 #include <sys/socket.h> 125 #else /* UN*X */ 126 #include <sys/types.h> /* u_int, u_char etc. */ 127 #include <sys/time.h> 128 #endif /* _WIN32/MSDOS/UN*X */ 129 130 #include <pcap/socket.h> /* for SOCKET, as the active-mode rpcap APIs use it */ 131 132 #ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H 133 #include <pcap/bpf.h> 134 #endif 135 136 #include <stdio.h> 137 138 #ifdef __cplusplus 139 extern "C" { 140 #endif 141 142 /* 143 * Version number of the current version of the pcap file format. 144 * 145 * NOTE: this is *NOT* the version number of the libpcap library. 146 * To fetch the version information for the version of libpcap 147 * you're using, use pcap_lib_version(). 148 */ 149 #define PCAP_VERSION_MAJOR 2 150 #define PCAP_VERSION_MINOR 4 151 152 #define PCAP_ERRBUF_SIZE 256 153 154 /* 155 * Compatibility for systems that have a bpf.h that 156 * predates the bpf typedefs for 64-bit support. 157 */ 158 #if BPF_RELEASE - 0 < 199406 159 typedef int bpf_int32; 160 typedef u_int bpf_u_int32; 161 #endif 162 163 typedef struct pcap pcap_t; 164 typedef struct pcap_dumper pcap_dumper_t; 165 typedef struct pcap_if pcap_if_t; 166 typedef struct pcap_addr pcap_addr_t; 167 168 /* 169 * The first record in the file contains saved values for some 170 * of the flags used in the printout phases of tcpdump. 171 * Many fields here are 32 bit ints so compilers won't insert unwanted 172 * padding; these files need to be interchangeable across architectures. 173 * Documentation: https://www.tcpdump.org/manpages/pcap-savefile.5.txt. 174 * 175 * Do not change the layout of this structure, in any way (this includes 176 * changes that only affect the length of fields in this structure). 177 * 178 * Also, do not change the interpretation of any of the members of this 179 * structure, in any way (this includes using values other than 180 * LINKTYPE_ values, as defined in "savefile.c", in the "linktype" 181 * field). 182 * 183 * Instead: 184 * 185 * introduce a new structure for the new format, if the layout 186 * of the structure changed; 187 * 188 * send mail to "tcpdump-workers@lists.tcpdump.org", requesting 189 * a new magic number for your new capture file format, and, when 190 * you get the new magic number, put it in "savefile.c"; 191 * 192 * use that magic number for save files with the changed file 193 * header; 194 * 195 * make the code in "savefile.c" capable of reading files with 196 * the old file header as well as files with the new file header 197 * (using the magic number to determine the header format). 198 * 199 * Then supply the changes by forking the branch at 200 * 201 * https://github.com/the-tcpdump-group/libpcap/tree/master 202 * 203 * and issuing a pull request, so that future versions of libpcap and 204 * programs that use it (such as tcpdump) will be able to read your new 205 * capture file format. 206 */ 207 struct pcap_file_header { 208 bpf_u_int32 magic; 209 u_short version_major; 210 u_short version_minor; 211 bpf_int32 thiszone; /* gmt to local correction; this is always 0 */ 212 bpf_u_int32 sigfigs; /* accuracy of timestamps; this is always 0 */ 213 bpf_u_int32 snaplen; /* max length saved portion of each pkt */ 214 bpf_u_int32 linktype; /* data link type (LINKTYPE_*) */ 215 }; 216 217 /* 218 * Macros for the value returned by pcap_datalink_ext(). 219 * 220 * If LT_FCS_LENGTH_PRESENT(x) is true, the LT_FCS_LENGTH(x) macro 221 * gives the FCS length of packets in the capture. 222 */ 223 #define LT_FCS_LENGTH_PRESENT(x) ((x) & 0x04000000) 224 #define LT_FCS_LENGTH(x) (((x) & 0xF0000000) >> 28) 225 #define LT_FCS_DATALINK_EXT(x) ((((x) & 0xF) << 28) | 0x04000000) 226 227 typedef enum { 228 PCAP_D_INOUT = 0, 229 PCAP_D_IN, 230 PCAP_D_OUT 231 } pcap_direction_t; 232 233 /* 234 * Generic per-packet information, as supplied by libpcap. 235 * 236 * The time stamp can and should be a "struct timeval", regardless of 237 * whether your system supports 32-bit tv_sec in "struct timeval", 238 * 64-bit tv_sec in "struct timeval", or both if it supports both 32-bit 239 * and 64-bit applications. The on-disk format of savefiles uses 32-bit 240 * tv_sec (and tv_usec); this structure is irrelevant to that. 32-bit 241 * and 64-bit versions of libpcap, even if they're on the same platform, 242 * should supply the appropriate version of "struct timeval", even if 243 * that's not what the underlying packet capture mechanism supplies. 244 */ 245 struct pcap_pkthdr { 246 struct timeval ts; /* time stamp */ 247 bpf_u_int32 caplen; /* length of portion present */ 248 bpf_u_int32 len; /* length of this packet (off wire) */ 249 }; 250 251 /* 252 * As returned by the pcap_stats() 253 */ 254 struct pcap_stat { 255 u_int ps_recv; /* number of packets received */ 256 u_int ps_drop; /* number of packets dropped */ 257 u_int ps_ifdrop; /* drops by interface -- only supported on some platforms */ 258 #ifdef _WIN32 259 u_int ps_capt; /* number of packets that reach the application */ 260 u_int ps_sent; /* number of packets sent by the server on the network */ 261 u_int ps_netdrop; /* number of packets lost on the network */ 262 #endif /* _WIN32 */ 263 }; 264 265 #ifdef MSDOS 266 /* 267 * As returned by the pcap_stats_ex() 268 */ 269 struct pcap_stat_ex { 270 u_long rx_packets; /* total packets received */ 271 u_long tx_packets; /* total packets transmitted */ 272 u_long rx_bytes; /* total bytes received */ 273 u_long tx_bytes; /* total bytes transmitted */ 274 u_long rx_errors; /* bad packets received */ 275 u_long tx_errors; /* packet transmit problems */ 276 u_long rx_dropped; /* no space in Rx buffers */ 277 u_long tx_dropped; /* no space available for Tx */ 278 u_long multicast; /* multicast packets received */ 279 u_long collisions; 280 281 /* detailed rx_errors: */ 282 u_long rx_length_errors; 283 u_long rx_over_errors; /* receiver ring buff overflow */ 284 u_long rx_crc_errors; /* recv'd pkt with crc error */ 285 u_long rx_frame_errors; /* recv'd frame alignment error */ 286 u_long rx_fifo_errors; /* recv'r fifo overrun */ 287 u_long rx_missed_errors; /* recv'r missed packet */ 288 289 /* detailed tx_errors */ 290 u_long tx_aborted_errors; 291 u_long tx_carrier_errors; 292 u_long tx_fifo_errors; 293 u_long tx_heartbeat_errors; 294 u_long tx_window_errors; 295 }; 296 #endif 297 298 /* 299 * Item in a list of interfaces. 300 */ 301 struct pcap_if { 302 struct pcap_if *next; 303 char *name; /* name to hand to "pcap_open_live()" */ 304 char *description; /* textual description of interface, or NULL */ 305 struct pcap_addr *addresses; 306 bpf_u_int32 flags; /* PCAP_IF_ interface flags */ 307 }; 308 309 #define PCAP_IF_LOOPBACK 0x00000001 /* interface is loopback */ 310 #define PCAP_IF_UP 0x00000002 /* interface is up */ 311 #define PCAP_IF_RUNNING 0x00000004 /* interface is running */ 312 #define PCAP_IF_WIRELESS 0x00000008 /* interface is wireless (*NOT* necessarily Wi-Fi!) */ 313 #define PCAP_IF_CONNECTION_STATUS 0x00000030 /* connection status: */ 314 #define PCAP_IF_CONNECTION_STATUS_UNKNOWN 0x00000000 /* unknown */ 315 #define PCAP_IF_CONNECTION_STATUS_CONNECTED 0x00000010 /* connected */ 316 #define PCAP_IF_CONNECTION_STATUS_DISCONNECTED 0x00000020 /* disconnected */ 317 #define PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE 0x00000030 /* not applicable */ 318 319 /* 320 * Representation of an interface address. 321 */ 322 struct pcap_addr { 323 struct pcap_addr *next; 324 struct sockaddr *addr; /* address */ 325 struct sockaddr *netmask; /* netmask for that address */ 326 struct sockaddr *broadaddr; /* broadcast address for that address */ 327 struct sockaddr *dstaddr; /* P2P destination address for that address */ 328 }; 329 330 typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *, 331 const u_char *); 332 333 /* 334 * Error codes for the pcap API. 335 * These will all be negative, so you can check for the success or 336 * failure of a call that returns these codes by checking for a 337 * negative value. 338 */ 339 #define PCAP_ERROR -1 /* generic error code */ 340 #define PCAP_ERROR_BREAK -2 /* loop terminated by pcap_breakloop */ 341 #define PCAP_ERROR_NOT_ACTIVATED -3 /* the capture needs to be activated */ 342 #define PCAP_ERROR_ACTIVATED -4 /* the operation can't be performed on already activated captures */ 343 #define PCAP_ERROR_NO_SUCH_DEVICE -5 /* no such device exists */ 344 #define PCAP_ERROR_RFMON_NOTSUP -6 /* this device doesn't support rfmon (monitor) mode */ 345 #define PCAP_ERROR_NOT_RFMON -7 /* operation supported only in monitor mode */ 346 #define PCAP_ERROR_PERM_DENIED -8 /* no permission to open the device */ 347 #define PCAP_ERROR_IFACE_NOT_UP -9 /* interface isn't up */ 348 #define PCAP_ERROR_CANTSET_TSTAMP_TYPE -10 /* this device doesn't support setting the time stamp type */ 349 #define PCAP_ERROR_PROMISC_PERM_DENIED -11 /* you don't have permission to capture in promiscuous mode */ 350 #define PCAP_ERROR_TSTAMP_PRECISION_NOTSUP -12 /* the requested time stamp precision is not supported */ 351 352 /* 353 * Warning codes for the pcap API. 354 * These will all be positive and non-zero, so they won't look like 355 * errors. 356 */ 357 #define PCAP_WARNING 1 /* generic warning code */ 358 #define PCAP_WARNING_PROMISC_NOTSUP 2 /* this device doesn't support promiscuous mode */ 359 #define PCAP_WARNING_TSTAMP_TYPE_NOTSUP 3 /* the requested time stamp type is not supported */ 360 361 /* 362 * Value to pass to pcap_compile() as the netmask if you don't know what 363 * the netmask is. 364 */ 365 #define PCAP_NETMASK_UNKNOWN 0xffffffff 366 367 /* 368 * Initialize pcap. If this isn't called, pcap is initialized to 369 * a mode source-compatible and binary-compatible with older versions 370 * that lack this routine. 371 */ 372 373 /* 374 * Initialization options. 375 * All bits not listed here are reserved for expansion. 376 * 377 * On UNIX-like systems, the local character encoding is assumed to be 378 * UTF-8, so no character encoding transformations are done. 379 * 380 * On Windows, the local character encoding is the local ANSI code page. 381 */ 382 #define PCAP_CHAR_ENC_LOCAL 0x00000000U /* strings are in the local character encoding */ 383 #define PCAP_CHAR_ENC_UTF_8 0x00000001U /* strings are in UTF-8 */ 384 385 PCAP_AVAILABLE_1_10 386 PCAP_API int pcap_init(unsigned int, char *); 387 388 /* 389 * We're deprecating pcap_lookupdev() for various reasons (not 390 * thread-safe, can behave weirdly with WinPcap). Callers 391 * should use pcap_findalldevs() and use the first device. 392 */ 393 PCAP_AVAILABLE_0_4 394 PCAP_DEPRECATED("use 'pcap_findalldevs' and use the first device") 395 PCAP_API char *pcap_lookupdev(char *); 396 397 PCAP_AVAILABLE_0_4 398 PCAP_API int pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *); 399 400 PCAP_AVAILABLE_1_0 401 PCAP_API pcap_t *pcap_create(const char *, char *); 402 403 PCAP_AVAILABLE_1_0 404 PCAP_API int pcap_set_snaplen(pcap_t *, int); 405 406 PCAP_AVAILABLE_1_0 407 PCAP_API int pcap_set_promisc(pcap_t *, int); 408 409 PCAP_AVAILABLE_1_0 410 PCAP_API int pcap_can_set_rfmon(pcap_t *); 411 412 PCAP_AVAILABLE_1_0 413 PCAP_API int pcap_set_rfmon(pcap_t *, int); 414 415 PCAP_AVAILABLE_1_0 416 PCAP_API int pcap_set_timeout(pcap_t *, int); 417 418 PCAP_AVAILABLE_1_2 419 PCAP_API int pcap_set_tstamp_type(pcap_t *, int); 420 421 PCAP_AVAILABLE_1_5 422 PCAP_API int pcap_set_immediate_mode(pcap_t *, int); 423 424 PCAP_AVAILABLE_1_0 425 PCAP_API int pcap_set_buffer_size(pcap_t *, int); 426 427 PCAP_AVAILABLE_1_5 428 PCAP_API int pcap_set_tstamp_precision(pcap_t *, int); 429 430 PCAP_AVAILABLE_1_5 431 PCAP_API int pcap_get_tstamp_precision(pcap_t *); 432 433 PCAP_AVAILABLE_1_0 434 PCAP_API int pcap_activate(pcap_t *); 435 436 PCAP_AVAILABLE_1_2 437 PCAP_API int pcap_list_tstamp_types(pcap_t *, int **); 438 439 PCAP_AVAILABLE_1_2 440 PCAP_API void pcap_free_tstamp_types(int *); 441 442 PCAP_AVAILABLE_1_2 443 PCAP_API int pcap_tstamp_type_name_to_val(const char *); 444 445 PCAP_AVAILABLE_1_2 446 PCAP_API const char *pcap_tstamp_type_val_to_name(int); 447 448 PCAP_AVAILABLE_1_2 449 PCAP_API const char *pcap_tstamp_type_val_to_description(int); 450 451 #ifdef __linux__ 452 PCAP_AVAILABLE_1_9 453 PCAP_API int pcap_set_protocol_linux(pcap_t *, int); 454 #endif 455 456 /* 457 * Time stamp types. 458 * Not all systems and interfaces will necessarily support all of these. 459 * 460 * A system that supports PCAP_TSTAMP_HOST is offering time stamps 461 * provided by the host machine, rather than by the capture device, 462 * but not committing to any characteristics of the time stamp. 463 * 464 * PCAP_TSTAMP_HOST_LOWPREC is a time stamp, provided by the host machine, 465 * that's low-precision but relatively cheap to fetch; it's normally done 466 * using the system clock, so it's normally synchronized with times you'd 467 * fetch from system calls. 468 * 469 * PCAP_TSTAMP_HOST_HIPREC is a time stamp, provided by the host machine, 470 * that's high-precision; it might be more expensive to fetch. It is 471 * synchronized with the system clock. 472 * 473 * PCAP_TSTAMP_HOST_HIPREC_UNSYNCED is a time stamp, provided by the host 474 * machine, that's high-precision; it might be more expensive to fetch. 475 * It is not synchronized with the system clock, and might have 476 * problems with time stamps for packets received on different CPUs, 477 * depending on the platform. It might be more likely to be strictly 478 * monotonic than PCAP_TSTAMP_HOST_HIPREC. 479 * 480 * PCAP_TSTAMP_ADAPTER is a high-precision time stamp supplied by the 481 * capture device; it's synchronized with the system clock. 482 * 483 * PCAP_TSTAMP_ADAPTER_UNSYNCED is a high-precision time stamp supplied by 484 * the capture device; it's not synchronized with the system clock. 485 * 486 * Note that time stamps synchronized with the system clock can go 487 * backwards, as the system clock can go backwards. If a clock is 488 * not in sync with the system clock, that could be because the 489 * system clock isn't keeping accurate time, because the other 490 * clock isn't keeping accurate time, or both. 491 * 492 * Note that host-provided time stamps generally correspond to the 493 * time when the time-stamping code sees the packet; this could 494 * be some unknown amount of time after the first or last bit of 495 * the packet is received by the network adapter, due to batching 496 * of interrupts for packet arrival, queueing delays, etc.. 497 */ 498 #define PCAP_TSTAMP_HOST 0 /* host-provided, unknown characteristics */ 499 #define PCAP_TSTAMP_HOST_LOWPREC 1 /* host-provided, low precision, synced with the system clock */ 500 #define PCAP_TSTAMP_HOST_HIPREC 2 /* host-provided, high precision, synced with the system clock */ 501 #define PCAP_TSTAMP_ADAPTER 3 /* device-provided, synced with the system clock */ 502 #define PCAP_TSTAMP_ADAPTER_UNSYNCED 4 /* device-provided, not synced with the system clock */ 503 #define PCAP_TSTAMP_HOST_HIPREC_UNSYNCED 5 /* host-provided, high precision, not synced with the system clock */ 504 505 /* 506 * Time stamp resolution types. 507 * Not all systems and interfaces will necessarily support all of these 508 * resolutions when doing live captures; all of them can be requested 509 * when reading a savefile. 510 */ 511 #define PCAP_TSTAMP_PRECISION_MICRO 0 /* use timestamps with microsecond precision, default */ 512 #define PCAP_TSTAMP_PRECISION_NANO 1 /* use timestamps with nanosecond precision */ 513 514 PCAP_AVAILABLE_0_4 515 PCAP_API pcap_t *pcap_open_live(const char *, int, int, int, char *); 516 517 PCAP_AVAILABLE_0_6 518 PCAP_API pcap_t *pcap_open_dead(int, int); 519 520 PCAP_AVAILABLE_1_5 521 PCAP_API pcap_t *pcap_open_dead_with_tstamp_precision(int, int, u_int); 522 523 PCAP_AVAILABLE_1_5 524 PCAP_API pcap_t *pcap_open_offline_with_tstamp_precision(const char *, u_int, char *); 525 526 PCAP_AVAILABLE_0_4 527 PCAP_API pcap_t *pcap_open_offline(const char *, char *); 528 529 #ifdef _WIN32 530 PCAP_AVAILABLE_1_5 531 PCAP_API pcap_t *pcap_hopen_offline_with_tstamp_precision(intptr_t, u_int, char *); 532 533 PCAP_API pcap_t *pcap_hopen_offline(intptr_t, char *); 534 /* 535 * If we're building libpcap, these are internal routines in savefile.c, 536 * so we must not define them as macros. 537 * 538 * If we're not building libpcap, given that the version of the C runtime 539 * with which libpcap was built might be different from the version 540 * of the C runtime with which an application using libpcap was built, 541 * and that a FILE structure may differ between the two versions of the 542 * C runtime, calls to _fileno() must use the version of _fileno() in 543 * the C runtime used to open the FILE *, not the version in the C 544 * runtime with which libpcap was built. (Maybe once the Universal CRT 545 * rules the world, this will cease to be a problem.) 546 */ 547 #ifndef BUILDING_PCAP 548 #define pcap_fopen_offline_with_tstamp_precision(f,p,b) \ 549 pcap_hopen_offline_with_tstamp_precision(_get_osfhandle(_fileno(f)), p, b) 550 #define pcap_fopen_offline(f,b) \ 551 pcap_hopen_offline(_get_osfhandle(_fileno(f)), b) 552 #endif 553 #else /*_WIN32*/ 554 PCAP_AVAILABLE_1_5 555 PCAP_API pcap_t *pcap_fopen_offline_with_tstamp_precision(FILE *, u_int, char *); 556 557 PCAP_AVAILABLE_0_9 558 PCAP_API pcap_t *pcap_fopen_offline(FILE *, char *); 559 #endif /*_WIN32*/ 560 561 PCAP_AVAILABLE_0_4 562 PCAP_API void pcap_close(pcap_t *); 563 564 PCAP_AVAILABLE_0_4 565 PCAP_API int pcap_loop(pcap_t *, int, pcap_handler, u_char *); 566 567 PCAP_AVAILABLE_0_4 568 PCAP_API int pcap_dispatch(pcap_t *, int, pcap_handler, u_char *); 569 570 PCAP_AVAILABLE_0_4 571 PCAP_API const u_char *pcap_next(pcap_t *, struct pcap_pkthdr *); 572 573 PCAP_AVAILABLE_0_8 574 PCAP_API int pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **); 575 576 PCAP_AVAILABLE_0_8 577 PCAP_API void pcap_breakloop(pcap_t *); 578 579 PCAP_AVAILABLE_0_4 580 PCAP_API int pcap_stats(pcap_t *, struct pcap_stat *); 581 582 PCAP_AVAILABLE_0_4 583 PCAP_API int pcap_setfilter(pcap_t *, struct bpf_program *); 584 585 PCAP_AVAILABLE_0_9 586 PCAP_API int pcap_setdirection(pcap_t *, pcap_direction_t); 587 588 PCAP_AVAILABLE_0_7 589 PCAP_API int pcap_getnonblock(pcap_t *, char *); 590 591 PCAP_AVAILABLE_0_7 592 PCAP_API int pcap_setnonblock(pcap_t *, int, char *); 593 594 PCAP_AVAILABLE_0_9 595 PCAP_API int pcap_inject(pcap_t *, const void *, size_t); 596 597 PCAP_AVAILABLE_0_8 598 PCAP_API int pcap_sendpacket(pcap_t *, const u_char *, int); 599 600 PCAP_AVAILABLE_1_0 601 PCAP_API const char *pcap_statustostr(int); 602 603 PCAP_AVAILABLE_0_4 604 PCAP_API const char *pcap_strerror(int); 605 606 PCAP_AVAILABLE_0_4 607 PCAP_API char *pcap_geterr(pcap_t *); 608 609 PCAP_AVAILABLE_0_4 610 PCAP_API void pcap_perror(pcap_t *, const char *); 611 612 PCAP_AVAILABLE_0_4 613 PCAP_API int pcap_compile(pcap_t *, struct bpf_program *, const char *, int, 614 bpf_u_int32); 615 616 PCAP_AVAILABLE_0_5 617 PCAP_DEPRECATED("use pcap_open_dead(), pcap_compile() and pcap_close()") 618 PCAP_API int pcap_compile_nopcap(int, int, struct bpf_program *, 619 const char *, int, bpf_u_int32); 620 621 /* XXX - this took two arguments in 0.4 and 0.5 */ 622 PCAP_AVAILABLE_0_6 623 PCAP_API void pcap_freecode(struct bpf_program *); 624 625 PCAP_AVAILABLE_1_0 626 PCAP_API int pcap_offline_filter(const struct bpf_program *, 627 const struct pcap_pkthdr *, const u_char *); 628 629 PCAP_AVAILABLE_0_4 630 PCAP_API int pcap_datalink(pcap_t *); 631 632 PCAP_AVAILABLE_1_0 633 PCAP_API int pcap_datalink_ext(pcap_t *); 634 635 PCAP_AVAILABLE_0_8 636 PCAP_API int pcap_list_datalinks(pcap_t *, int **); 637 638 PCAP_AVAILABLE_0_8 639 PCAP_API int pcap_set_datalink(pcap_t *, int); 640 641 PCAP_AVAILABLE_0_8 642 PCAP_API void pcap_free_datalinks(int *); 643 644 PCAP_AVAILABLE_0_8 645 PCAP_API int pcap_datalink_name_to_val(const char *); 646 647 PCAP_AVAILABLE_0_8 648 PCAP_API const char *pcap_datalink_val_to_name(int); 649 650 PCAP_AVAILABLE_0_8 651 PCAP_API const char *pcap_datalink_val_to_description(int); 652 653 PCAP_AVAILABLE_1_10 654 PCAP_API const char *pcap_datalink_val_to_description_or_dlt(int); 655 656 PCAP_AVAILABLE_0_4 657 PCAP_API int pcap_snapshot(pcap_t *); 658 659 PCAP_AVAILABLE_0_4 660 PCAP_API int pcap_is_swapped(pcap_t *); 661 662 PCAP_AVAILABLE_0_4 663 PCAP_API int pcap_major_version(pcap_t *); 664 665 PCAP_AVAILABLE_0_4 666 PCAP_API int pcap_minor_version(pcap_t *); 667 668 PCAP_AVAILABLE_1_9 669 PCAP_API int pcap_bufsize(pcap_t *); 670 671 /* XXX */ 672 PCAP_AVAILABLE_0_4 673 PCAP_API FILE *pcap_file(pcap_t *); 674 675 #ifdef _WIN32 676 /* 677 * This probably shouldn't have been kept in WinPcap; most if not all 678 * UN*X code that used it won't work on Windows. We deprecate it; if 679 * anybody really needs access to whatever HANDLE may be associated 680 * with a pcap_t (there's no guarantee that there is one), we can add 681 * a Windows-only pcap_handle() API that returns the HANDLE. 682 */ 683 PCAP_AVAILABLE_0_4 684 PCAP_DEPRECATED("request a 'pcap_handle' that returns a HANDLE if you need it") 685 PCAP_API int pcap_fileno(pcap_t *); 686 #else /* _WIN32 */ 687 PCAP_AVAILABLE_0_4 688 PCAP_API int pcap_fileno(pcap_t *); 689 #endif /* _WIN32 */ 690 691 #ifdef _WIN32 692 PCAP_API int pcap_wsockinit(void); 693 #endif 694 695 PCAP_AVAILABLE_0_4 696 PCAP_API pcap_dumper_t *pcap_dump_open(pcap_t *, const char *); 697 698 #ifdef _WIN32 699 PCAP_AVAILABLE_0_9 700 PCAP_API pcap_dumper_t *pcap_dump_hopen(pcap_t *, intptr_t); 701 702 /* 703 * If we're building libpcap, this is an internal routine in sf-pcap.c, so 704 * we must not define it as a macro. 705 * 706 * If we're not building libpcap, given that the version of the C runtime 707 * with which libpcap was built might be different from the version 708 * of the C runtime with which an application using libpcap was built, 709 * and that a FILE structure may differ between the two versions of the 710 * C runtime, calls to _fileno() must use the version of _fileno() in 711 * the C runtime used to open the FILE *, not the version in the C 712 * runtime with which libpcap was built. (Maybe once the Universal CRT 713 * rules the world, this will cease to be a problem.) 714 */ 715 #ifndef BUILDING_PCAP 716 #define pcap_dump_fopen(p,f) \ 717 pcap_dump_hopen(p, _get_osfhandle(_fileno(f))) 718 #endif 719 #else /*_WIN32*/ 720 PCAP_AVAILABLE_0_9 721 PCAP_API pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp); 722 #endif /*_WIN32*/ 723 724 PCAP_AVAILABLE_1_7 725 PCAP_API pcap_dumper_t *pcap_dump_open_append(pcap_t *, const char *); 726 727 PCAP_AVAILABLE_0_8 728 PCAP_API FILE *pcap_dump_file(pcap_dumper_t *); 729 730 PCAP_AVAILABLE_0_9 731 PCAP_API long pcap_dump_ftell(pcap_dumper_t *); 732 733 PCAP_AVAILABLE_1_9 734 PCAP_API int64_t pcap_dump_ftell64(pcap_dumper_t *); 735 736 PCAP_AVAILABLE_0_8 737 PCAP_API int pcap_dump_flush(pcap_dumper_t *); 738 739 PCAP_AVAILABLE_0_4 740 PCAP_API void pcap_dump_close(pcap_dumper_t *); 741 742 PCAP_AVAILABLE_0_4 743 PCAP_API void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *); 744 745 PCAP_AVAILABLE_0_7 746 PCAP_API int pcap_findalldevs(pcap_if_t **, char *); 747 748 PCAP_AVAILABLE_0_7 749 PCAP_API void pcap_freealldevs(pcap_if_t *); 750 751 /* 752 * We return a pointer to the version string, rather than exporting the 753 * version string directly. 754 * 755 * On at least some UNIXes, if you import data from a shared library into 756 * a program, the data is bound into the program binary, so if the string 757 * in the version of the library with which the program was linked isn't 758 * the same as the string in the version of the library with which the 759 * program is being run, various undesirable things may happen (warnings, 760 * the string being the one from the version of the library with which the 761 * program was linked, or even weirder things, such as the string being the 762 * one from the library but being truncated). 763 * 764 * On Windows, the string is constructed at run time. 765 */ 766 PCAP_AVAILABLE_0_8 767 PCAP_API const char *pcap_lib_version(void); 768 769 #if defined(_WIN32) 770 771 /* 772 * Win32 definitions 773 */ 774 775 /*! 776 \brief A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit(). 777 */ 778 struct pcap_send_queue 779 { 780 u_int maxlen; /* Maximum size of the queue, in bytes. This 781 variable contains the size of the buffer field. */ 782 u_int len; /* Current size of the queue, in bytes. */ 783 char *buffer; /* Buffer containing the packets to be sent. */ 784 }; 785 786 typedef struct pcap_send_queue pcap_send_queue; 787 788 /*! 789 \brief This typedef is a support for the pcap_get_airpcap_handle() function 790 */ 791 #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_) 792 #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_ 793 typedef struct _AirpcapHandle *PAirpcapHandle; 794 #endif 795 796 PCAP_API int pcap_setbuff(pcap_t *p, int dim); 797 PCAP_API int pcap_setmode(pcap_t *p, int mode); 798 PCAP_API int pcap_setmintocopy(pcap_t *p, int size); 799 800 PCAP_API HANDLE pcap_getevent(pcap_t *p); 801 802 PCAP_AVAILABLE_1_8 803 PCAP_API int pcap_oid_get_request(pcap_t *, bpf_u_int32, void *, size_t *); 804 805 PCAP_AVAILABLE_1_8 806 PCAP_API int pcap_oid_set_request(pcap_t *, bpf_u_int32, const void *, size_t *); 807 808 PCAP_API pcap_send_queue* pcap_sendqueue_alloc(u_int memsize); 809 810 PCAP_API void pcap_sendqueue_destroy(pcap_send_queue* queue); 811 812 PCAP_API int pcap_sendqueue_queue(pcap_send_queue* queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data); 813 814 PCAP_API u_int pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue* queue, int sync); 815 816 PCAP_API struct pcap_stat *pcap_stats_ex(pcap_t *p, int *pcap_stat_size); 817 818 PCAP_API int pcap_setuserbuffer(pcap_t *p, int size); 819 820 PCAP_API int pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks); 821 822 PCAP_API int pcap_live_dump_ended(pcap_t *p, int sync); 823 824 PCAP_API int pcap_start_oem(char* err_str, int flags); 825 826 PCAP_API PAirpcapHandle pcap_get_airpcap_handle(pcap_t *p); 827 828 #define MODE_CAPT 0 829 #define MODE_STAT 1 830 #define MODE_MON 2 831 832 #elif defined(MSDOS) 833 834 /* 835 * MS-DOS definitions 836 */ 837 838 PCAP_API int pcap_stats_ex (pcap_t *, struct pcap_stat_ex *); 839 PCAP_API void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait); 840 PCAP_API u_long pcap_mac_packets (void); 841 842 #else /* UN*X */ 843 844 /* 845 * UN*X definitions 846 */ 847 848 PCAP_AVAILABLE_0_8 849 PCAP_API int pcap_get_selectable_fd(pcap_t *); 850 851 PCAP_AVAILABLE_1_9 852 PCAP_API const struct timeval *pcap_get_required_select_timeout(pcap_t *); 853 854 #endif /* _WIN32/MSDOS/UN*X */ 855 856 /* 857 * Remote capture definitions. 858 * 859 * These routines are only present if libpcap has been configured to 860 * include remote capture support. 861 */ 862 863 /* 864 * The maximum buffer size in which address, port, interface names are kept. 865 * 866 * In case the adapter name or such is larger than this value, it is truncated. 867 * This is not used by the user; however it must be aware that an hostname / interface 868 * name longer than this value will be truncated. 869 */ 870 #define PCAP_BUF_SIZE 1024 871 872 /* 873 * The type of input source, passed to pcap_open(). 874 */ 875 #define PCAP_SRC_FILE 2 /* local savefile */ 876 #define PCAP_SRC_IFLOCAL 3 /* local network interface */ 877 #define PCAP_SRC_IFREMOTE 4 /* interface on a remote host, using RPCAP */ 878 879 /* 880 * The formats allowed by pcap_open() are the following: 881 * - file://path_and_filename [opens a local file] 882 * - rpcap://devicename [opens the selected device available on the local host, without using the RPCAP protocol] 883 * - rpcap://host/devicename [opens the selected device available on a remote host] 884 * - rpcap://host:port/devicename [opens the selected device available on a remote host, using a non-standard port for RPCAP] 885 * - adaptername [to open a local adapter; kept for compatibility, but it is strongly discouraged] 886 * - (NULL) [to open the first local adapter; kept for compatibility, but it is strongly discouraged] 887 * 888 * The formats allowed by the pcap_findalldevs_ex() are the following: 889 * - file://folder/ [lists all the files in the given folder] 890 * - rpcap:// [lists all local adapters] 891 * - rpcap://host:port/ [lists the devices available on a remote host] 892 * 893 * In all the above, "rpcaps://" can be substituted for "rpcap://" to enable 894 * SSL (if it has been compiled in). 895 * 896 * Referring to the 'host' and 'port' parameters, they can be either numeric or literal. Since 897 * IPv6 is fully supported, these are the allowed formats: 898 * 899 * - host (literal): e.g. host.foo.bar 900 * - host (numeric IPv4): e.g. 10.11.12.13 901 * - host (numeric IPv4, IPv6 style): e.g. [10.11.12.13] 902 * - host (numeric IPv6): e.g. [1:2:3::4] 903 * - port: can be either numeric (e.g. '80') or literal (e.g. 'http') 904 * 905 * Here you find some allowed examples: 906 * - rpcap://host.foo.bar/devicename [everything literal, no port number] 907 * - rpcap://host.foo.bar:1234/devicename [everything literal, with port number] 908 * - rpcap://10.11.12.13/devicename [IPv4 numeric, no port number] 909 * - rpcap://10.11.12.13:1234/devicename [IPv4 numeric, with port number] 910 * - rpcap://[10.11.12.13]:1234/devicename [IPv4 numeric with IPv6 format, with port number] 911 * - rpcap://[1:2:3::4]/devicename [IPv6 numeric, no port number] 912 * - rpcap://[1:2:3::4]:1234/devicename [IPv6 numeric, with port number] 913 * - rpcap://[1:2:3::4]:http/devicename [IPv6 numeric, with literal port number] 914 */ 915 916 /* 917 * URL schemes for capture source. 918 */ 919 /* 920 * This string indicates that the user wants to open a capture from a 921 * local file. 922 */ 923 #define PCAP_SRC_FILE_STRING "file://" 924 /* 925 * This string indicates that the user wants to open a capture from a 926 * network interface. This string does not necessarily involve the use 927 * of the RPCAP protocol. If the interface required resides on the local 928 * host, the RPCAP protocol is not involved and the local functions are used. 929 */ 930 #define PCAP_SRC_IF_STRING "rpcap://" 931 932 /* 933 * Flags to pass to pcap_open(). 934 */ 935 936 /* 937 * Specifies whether promiscuous mode is to be used. 938 */ 939 #define PCAP_OPENFLAG_PROMISCUOUS 0x00000001 940 941 /* 942 * Specifies, for an RPCAP capture, whether the data transfer (in 943 * case of a remote capture) has to be done with UDP protocol. 944 * 945 * If it is '1' if you want a UDP data connection, '0' if you want 946 * a TCP data connection; control connection is always TCP-based. 947 * A UDP connection is much lighter, but it does not guarantee that all 948 * the captured packets arrive to the client workstation. Moreover, 949 * it could be harmful in case of network congestion. 950 * This flag is meaningless if the source is not a remote interface. 951 * In that case, it is simply ignored. 952 */ 953 #define PCAP_OPENFLAG_DATATX_UDP 0x00000002 954 955 /* 956 * Specifies whether the remote probe will capture its own generated 957 * traffic. 958 * 959 * In case the remote probe uses the same interface to capture traffic 960 * and to send data back to the caller, the captured traffic includes 961 * the RPCAP traffic as well. If this flag is turned on, the RPCAP 962 * traffic is excluded from the capture, so that the trace returned 963 * back to the collector is does not include this traffic. 964 * 965 * Has no effect on local interfaces or savefiles. 966 */ 967 #define PCAP_OPENFLAG_NOCAPTURE_RPCAP 0x00000004 968 969 /* 970 * Specifies whether the local adapter will capture its own generated traffic. 971 * 972 * This flag tells the underlying capture driver to drop the packets 973 * that were sent by itself. This is useful when building applications 974 * such as bridges that should ignore the traffic they just sent. 975 * 976 * Supported only on Windows. 977 */ 978 #define PCAP_OPENFLAG_NOCAPTURE_LOCAL 0x00000008 979 980 /* 981 * This flag configures the adapter for maximum responsiveness. 982 * 983 * In presence of a large value for nbytes, WinPcap waits for the arrival 984 * of several packets before copying the data to the user. This guarantees 985 * a low number of system calls, i.e. lower processor usage, i.e. better 986 * performance, which is good for applications like sniffers. If the user 987 * sets the PCAP_OPENFLAG_MAX_RESPONSIVENESS flag, the capture driver will 988 * copy the packets as soon as the application is ready to receive them. 989 * This is suggested for real time applications (such as, for example, 990 * a bridge) that need the best responsiveness. 991 * 992 * The equivalent with pcap_create()/pcap_activate() is "immediate mode". 993 */ 994 #define PCAP_OPENFLAG_MAX_RESPONSIVENESS 0x00000010 995 996 /* 997 * Remote authentication methods. 998 * These are used in the 'type' member of the pcap_rmtauth structure. 999 */ 1000 1001 /* 1002 * NULL authentication. 1003 * 1004 * The 'NULL' authentication has to be equal to 'zero', so that old 1005 * applications can just put every field of struct pcap_rmtauth to zero, 1006 * and it does work. 1007 */ 1008 #define RPCAP_RMTAUTH_NULL 0 1009 /* 1010 * Username/password authentication. 1011 * 1012 * With this type of authentication, the RPCAP protocol will use the username/ 1013 * password provided to authenticate the user on the remote machine. If the 1014 * authentication is successful (and the user has the right to open network 1015 * devices) the RPCAP connection will continue; otherwise it will be dropped. 1016 * 1017 * *******NOTE********: unless TLS is being used, the username and password 1018 * are sent over the network to the capture server *IN CLEAR TEXT*. Don't 1019 * use this, without TLS (i.e., with rpcap:// rather than rpcaps://) on 1020 * a network that you don't completely control! (And be *really* careful 1021 * in your definition of "completely"!) 1022 */ 1023 #define RPCAP_RMTAUTH_PWD 1 1024 1025 /* 1026 * This structure keeps the information needed to authenticate the user 1027 * on a remote machine. 1028 * 1029 * The remote machine can either grant or refuse the access according 1030 * to the information provided. 1031 * In case the NULL authentication is required, both 'username' and 1032 * 'password' can be NULL pointers. 1033 * 1034 * This structure is meaningless if the source is not a remote interface; 1035 * in that case, the functions which requires such a structure can accept 1036 * a NULL pointer as well. 1037 */ 1038 struct pcap_rmtauth 1039 { 1040 /* 1041 * \brief Type of the authentication required. 1042 * 1043 * In order to provide maximum flexibility, we can support different types 1044 * of authentication based on the value of this 'type' variable. The currently 1045 * supported authentication methods are defined into the 1046 * \link remote_auth_methods Remote Authentication Methods Section\endlink. 1047 */ 1048 int type; 1049 /* 1050 * \brief Zero-terminated string containing the username that has to be 1051 * used on the remote machine for authentication. 1052 * 1053 * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication 1054 * and it can be NULL. 1055 */ 1056 char *username; 1057 /* 1058 * \brief Zero-terminated string containing the password that has to be 1059 * used on the remote machine for authentication. 1060 * 1061 * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication 1062 * and it can be NULL. 1063 */ 1064 char *password; 1065 }; 1066 1067 /* 1068 * This routine can open a savefile, a local device, or a device on 1069 * a remote machine running an RPCAP server. 1070 * 1071 * For opening a savefile, the pcap_open_offline routines can be used, 1072 * and will work just as well; code using them will work on more 1073 * platforms than code using pcap_open() to open savefiles. 1074 * 1075 * For opening a local device, pcap_open_live() can be used; it supports 1076 * most of the capabilities that pcap_open() supports, and code using it 1077 * will work on more platforms than code using pcap_open(). pcap_create() 1078 * and pcap_activate() can also be used; they support all capabilities 1079 * that pcap_open() supports, except for the Windows-only 1080 * PCAP_OPENFLAG_NOCAPTURE_LOCAL, and support additional capabilities. 1081 * 1082 * For opening a remote capture, pcap_open() is currently the only 1083 * API available. 1084 */ 1085 PCAP_AVAILABLE_1_9 1086 PCAP_API pcap_t *pcap_open(const char *source, int snaplen, int flags, 1087 int read_timeout, struct pcap_rmtauth *auth, char *errbuf); 1088 1089 PCAP_AVAILABLE_1_9 1090 PCAP_API int pcap_createsrcstr(char *source, int type, const char *host, 1091 const char *port, const char *name, char *errbuf); 1092 1093 PCAP_AVAILABLE_1_9 1094 PCAP_API int pcap_parsesrcstr(const char *source, int *type, char *host, 1095 char *port, char *name, char *errbuf); 1096 1097 /* 1098 * This routine can scan a directory for savefiles, list local capture 1099 * devices, or list capture devices on a remote machine running an RPCAP 1100 * server. 1101 * 1102 * For scanning for savefiles, it can be used on both UN*X systems and 1103 * Windows systems; for each directory entry it sees, it tries to open 1104 * the file as a savefile using pcap_open_offline(), and only includes 1105 * it in the list of files if the open succeeds, so it filters out 1106 * files for which the user doesn't have read permission, as well as 1107 * files that aren't valid savefiles readable by libpcap. 1108 * 1109 * For listing local capture devices, it's just a wrapper around 1110 * pcap_findalldevs(); code using pcap_findalldevs() will work on more 1111 * platforms than code using pcap_findalldevs_ex(). 1112 * 1113 * For listing remote capture devices, pcap_findalldevs_ex() is currently 1114 * the only API available. 1115 */ 1116 PCAP_AVAILABLE_1_9 1117 PCAP_API int pcap_findalldevs_ex(const char *source, 1118 struct pcap_rmtauth *auth, pcap_if_t **alldevs, char *errbuf); 1119 1120 /* 1121 * Sampling methods. 1122 * 1123 * These allow pcap_loop(), pcap_dispatch(), pcap_next(), and pcap_next_ex() 1124 * to see only a sample of packets, rather than all packets. 1125 * 1126 * Currently, they work only on Windows local captures. 1127 */ 1128 1129 /* 1130 * Specifies that no sampling is to be done on the current capture. 1131 * 1132 * In this case, no sampling algorithms are applied to the current capture. 1133 */ 1134 #define PCAP_SAMP_NOSAMP 0 1135 1136 /* 1137 * Specifies that only 1 out of N packets must be returned to the user. 1138 * 1139 * In this case, the 'value' field of the 'pcap_samp' structure indicates the 1140 * number of packets (minus 1) that must be discarded before one packet got 1141 * accepted. 1142 * In other words, if 'value = 10', the first packet is returned to the 1143 * caller, while the following 9 are discarded. 1144 */ 1145 #define PCAP_SAMP_1_EVERY_N 1 1146 1147 /* 1148 * Specifies that we have to return 1 packet every N milliseconds. 1149 * 1150 * In this case, the 'value' field of the 'pcap_samp' structure indicates 1151 * the 'waiting time' in milliseconds before one packet got accepted. 1152 * In other words, if 'value = 10', the first packet is returned to the 1153 * caller; the next returned one will be the first packet that arrives 1154 * when 10ms have elapsed. 1155 */ 1156 #define PCAP_SAMP_FIRST_AFTER_N_MS 2 1157 1158 /* 1159 * This structure defines the information related to sampling. 1160 * 1161 * In case the sampling is requested, the capturing device should read 1162 * only a subset of the packets coming from the source. The returned packets 1163 * depend on the sampling parameters. 1164 * 1165 * WARNING: The sampling process is applied *after* the filtering process. 1166 * In other words, packets are filtered first, then the sampling process 1167 * selects a subset of the 'filtered' packets and it returns them to the 1168 * caller. 1169 */ 1170 struct pcap_samp 1171 { 1172 /* 1173 * Method used for sampling; see above. 1174 */ 1175 int method; 1176 1177 /* 1178 * This value depends on the sampling method defined. 1179 * For its meaning, see above. 1180 */ 1181 int value; 1182 }; 1183 1184 /* 1185 * New functions. 1186 */ 1187 PCAP_AVAILABLE_1_9 1188 PCAP_API struct pcap_samp *pcap_setsampling(pcap_t *p); 1189 1190 /* 1191 * RPCAP active mode. 1192 */ 1193 1194 /* Maximum length of an host name (needed for the RPCAP active mode) */ 1195 #define RPCAP_HOSTLIST_SIZE 1024 1196 1197 PCAP_AVAILABLE_1_9 1198 PCAP_API SOCKET pcap_remoteact_accept(const char *address, const char *port, 1199 const char *hostlist, char *connectinghost, 1200 struct pcap_rmtauth *auth, char *errbuf); 1201 1202 PCAP_AVAILABLE_1_10 1203 PCAP_API SOCKET pcap_remoteact_accept_ex(const char *address, const char *port, 1204 const char *hostlist, char *connectinghost, 1205 struct pcap_rmtauth *auth, int uses_ssl, char *errbuf); 1206 1207 PCAP_AVAILABLE_1_9 1208 PCAP_API int pcap_remoteact_list(char *hostlist, char sep, int size, 1209 char *errbuf); 1210 1211 PCAP_AVAILABLE_1_9 1212 PCAP_API int pcap_remoteact_close(const char *host, char *errbuf); 1213 1214 PCAP_AVAILABLE_1_9 1215 PCAP_API void pcap_remoteact_cleanup(void); 1216 1217 #ifdef __cplusplus 1218 } 1219 #endif 1220 1221 #endif /* lib_pcap_pcap_h */ 1222