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 * includeing 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 #else 135 #include <net/bpf.h> 136 #endif 137 138 #include <stdio.h> 139 140 #ifdef __cplusplus 141 extern "C" { 142 #endif 143 144 /* 145 * Version number of the current version of the pcap file format. 146 * 147 * NOTE: this is *NOT* the version number of the libpcap library. 148 * To fetch the version information for the version of libpcap 149 * you're using, use pcap_lib_version(). 150 */ 151 #define PCAP_VERSION_MAJOR 2 152 #define PCAP_VERSION_MINOR 4 153 154 #define PCAP_ERRBUF_SIZE 256 155 156 /* 157 * Compatibility for systems that have a bpf.h that 158 * predates the bpf typedefs for 64-bit support. 159 */ 160 #if BPF_RELEASE - 0 < 199406 161 typedef int bpf_int32; 162 typedef u_int bpf_u_int32; 163 #endif 164 165 typedef struct pcap pcap_t; 166 typedef struct pcap_dumper pcap_dumper_t; 167 typedef struct pcap_if pcap_if_t; 168 typedef struct pcap_addr pcap_addr_t; 169 170 /* 171 * The first record in the file contains saved values for some 172 * of the flags used in the printout phases of tcpdump. 173 * Many fields here are 32 bit ints so compilers won't insert unwanted 174 * padding; these files need to be interchangeable across architectures. 175 * Documentation: https://www.tcpdump.org/manpages/pcap-savefile.5.txt. 176 * 177 * Do not change the layout of this structure, in any way (this includes 178 * changes that only affect the length of fields in this structure). 179 * 180 * Also, do not change the interpretation of any of the members of this 181 * structure, in any way (this includes using values other than 182 * LINKTYPE_ values, as defined in "savefile.c", in the "linktype" 183 * field). 184 * 185 * Instead: 186 * 187 * introduce a new structure for the new format, if the layout 188 * of the structure changed; 189 * 190 * send mail to "tcpdump-workers@lists.tcpdump.org", requesting 191 * a new magic number for your new capture file format, and, when 192 * you get the new magic number, put it in "savefile.c"; 193 * 194 * use that magic number for save files with the changed file 195 * header; 196 * 197 * make the code in "savefile.c" capable of reading files with 198 * the old file header as well as files with the new file header 199 * (using the magic number to determine the header format). 200 * 201 * Then supply the changes by forking the branch at 202 * 203 * https://github.com/the-tcpdump-group/libpcap/tree/master 204 * 205 * and issuing a pull request, so that future versions of libpcap and 206 * programs that use it (such as tcpdump) will be able to read your new 207 * capture file format. 208 */ 209 struct pcap_file_header { 210 bpf_u_int32 magic; 211 u_short version_major; 212 u_short version_minor; 213 bpf_int32 thiszone; /* gmt to local correction; this is always 0 */ 214 bpf_u_int32 sigfigs; /* accuracy of timestamps; this is always 0 */ 215 bpf_u_int32 snaplen; /* max length saved portion of each pkt */ 216 bpf_u_int32 linktype; /* data link type (LINKTYPE_*) */ 217 }; 218 219 /* 220 * Macros for the value returned by pcap_datalink_ext(). 221 * 222 * If LT_FCS_LENGTH_PRESENT(x) is true, the LT_FCS_LENGTH(x) macro 223 * gives the FCS length of packets in the capture. 224 */ 225 #define LT_FCS_LENGTH_PRESENT(x) ((x) & 0x04000000) 226 #define LT_FCS_LENGTH(x) (((x) & 0xF0000000) >> 28) 227 #define LT_FCS_DATALINK_EXT(x) ((((x) & 0xF) << 28) | 0x04000000) 228 229 typedef enum { 230 PCAP_D_INOUT = 0, 231 PCAP_D_IN, 232 PCAP_D_OUT 233 } pcap_direction_t; 234 235 /* 236 * Generic per-packet information, as supplied by libpcap. 237 * 238 * The time stamp can and should be a "struct timeval", regardless of 239 * whether your system supports 32-bit tv_sec in "struct timeval", 240 * 64-bit tv_sec in "struct timeval", or both if it supports both 32-bit 241 * and 64-bit applications. The on-disk format of savefiles uses 32-bit 242 * tv_sec (and tv_usec); this structure is irrelevant to that. 32-bit 243 * and 64-bit versions of libpcap, even if they're on the same platform, 244 * should supply the appropriate version of "struct timeval", even if 245 * that's not what the underlying packet capture mechanism supplies. 246 */ 247 struct pcap_pkthdr { 248 struct timeval ts; /* time stamp */ 249 bpf_u_int32 caplen; /* length of portion present */ 250 bpf_u_int32 len; /* length of this packet (off wire) */ 251 }; 252 253 /* 254 * As returned by the pcap_stats() 255 */ 256 struct pcap_stat { 257 u_int ps_recv; /* number of packets received */ 258 u_int ps_drop; /* number of packets dropped */ 259 u_int ps_ifdrop; /* drops by interface -- only supported on some platforms */ 260 #ifdef _WIN32 261 u_int ps_capt; /* number of packets that reach the application */ 262 u_int ps_sent; /* number of packets sent by the server on the network */ 263 u_int ps_netdrop; /* number of packets lost on the network */ 264 #endif /* _WIN32 */ 265 }; 266 267 #ifdef MSDOS 268 /* 269 * As returned by the pcap_stats_ex() 270 */ 271 struct pcap_stat_ex { 272 u_long rx_packets; /* total packets received */ 273 u_long tx_packets; /* total packets transmitted */ 274 u_long rx_bytes; /* total bytes received */ 275 u_long tx_bytes; /* total bytes transmitted */ 276 u_long rx_errors; /* bad packets received */ 277 u_long tx_errors; /* packet transmit problems */ 278 u_long rx_dropped; /* no space in Rx buffers */ 279 u_long tx_dropped; /* no space available for Tx */ 280 u_long multicast; /* multicast packets received */ 281 u_long collisions; 282 283 /* detailed rx_errors: */ 284 u_long rx_length_errors; 285 u_long rx_over_errors; /* receiver ring buff overflow */ 286 u_long rx_crc_errors; /* recv'd pkt with crc error */ 287 u_long rx_frame_errors; /* recv'd frame alignment error */ 288 u_long rx_fifo_errors; /* recv'r fifo overrun */ 289 u_long rx_missed_errors; /* recv'r missed packet */ 290 291 /* detailed tx_errors */ 292 u_long tx_aborted_errors; 293 u_long tx_carrier_errors; 294 u_long tx_fifo_errors; 295 u_long tx_heartbeat_errors; 296 u_long tx_window_errors; 297 }; 298 #endif 299 300 /* 301 * Item in a list of interfaces. 302 */ 303 struct pcap_if { 304 struct pcap_if *next; 305 char *name; /* name to hand to "pcap_open_live()" */ 306 char *description; /* textual description of interface, or NULL */ 307 struct pcap_addr *addresses; 308 bpf_u_int32 flags; /* PCAP_IF_ interface flags */ 309 }; 310 311 #define PCAP_IF_LOOPBACK 0x00000001 /* interface is loopback */ 312 #define PCAP_IF_UP 0x00000002 /* interface is up */ 313 #define PCAP_IF_RUNNING 0x00000004 /* interface is running */ 314 #define PCAP_IF_WIRELESS 0x00000008 /* interface is wireless (*NOT* necessarily Wi-Fi!) */ 315 #define PCAP_IF_CONNECTION_STATUS 0x00000030 /* connection status: */ 316 #define PCAP_IF_CONNECTION_STATUS_UNKNOWN 0x00000000 /* unknown */ 317 #define PCAP_IF_CONNECTION_STATUS_CONNECTED 0x00000010 /* connected */ 318 #define PCAP_IF_CONNECTION_STATUS_DISCONNECTED 0x00000020 /* disconnected */ 319 #define PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE 0x00000030 /* not applicable */ 320 321 /* 322 * Representation of an interface address. 323 */ 324 struct pcap_addr { 325 struct pcap_addr *next; 326 struct sockaddr *addr; /* address */ 327 struct sockaddr *netmask; /* netmask for that address */ 328 struct sockaddr *broadaddr; /* broadcast address for that address */ 329 struct sockaddr *dstaddr; /* P2P destination address for that address */ 330 }; 331 332 typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *, 333 const u_char *); 334 335 /* 336 * Error codes for the pcap API. 337 * These will all be negative, so you can check for the success or 338 * failure of a call that returns these codes by checking for a 339 * negative value. 340 */ 341 #define PCAP_ERROR -1 /* generic error code */ 342 #define PCAP_ERROR_BREAK -2 /* loop terminated by pcap_breakloop */ 343 #define PCAP_ERROR_NOT_ACTIVATED -3 /* the capture needs to be activated */ 344 #define PCAP_ERROR_ACTIVATED -4 /* the operation can't be performed on already activated captures */ 345 #define PCAP_ERROR_NO_SUCH_DEVICE -5 /* no such device exists */ 346 #define PCAP_ERROR_RFMON_NOTSUP -6 /* this device doesn't support rfmon (monitor) mode */ 347 #define PCAP_ERROR_NOT_RFMON -7 /* operation supported only in monitor mode */ 348 #define PCAP_ERROR_PERM_DENIED -8 /* no permission to open the device */ 349 #define PCAP_ERROR_IFACE_NOT_UP -9 /* interface isn't up */ 350 #define PCAP_ERROR_CANTSET_TSTAMP_TYPE -10 /* this device doesn't support setting the time stamp type */ 351 #define PCAP_ERROR_PROMISC_PERM_DENIED -11 /* you don't have permission to capture in promiscuous mode */ 352 #define PCAP_ERROR_TSTAMP_PRECISION_NOTSUP -12 /* the requested time stamp precision is not supported */ 353 354 /* 355 * Warning codes for the pcap API. 356 * These will all be positive and non-zero, so they won't look like 357 * errors. 358 */ 359 #define PCAP_WARNING 1 /* generic warning code */ 360 #define PCAP_WARNING_PROMISC_NOTSUP 2 /* this device doesn't support promiscuous mode */ 361 #define PCAP_WARNING_TSTAMP_TYPE_NOTSUP 3 /* the requested time stamp type is not supported */ 362 363 /* 364 * Value to pass to pcap_compile() as the netmask if you don't know what 365 * the netmask is. 366 */ 367 #define PCAP_NETMASK_UNKNOWN 0xffffffff 368 369 /* 370 * Initialize pcap. If this isn't called, pcap is initialized to 371 * a mode source-compatible and binary-compatible with older versions 372 * that lack this routine. 373 */ 374 375 /* 376 * Initialization options. 377 * All bits not listed here are reserved for expansion. 378 * 379 * On UNIX-like systems, the local character encoding is assumed to be 380 * UTF-8, so no character encoding transformations are done. 381 * 382 * On Windows, the local character encoding is the local ANSI code page. 383 */ 384 #define PCAP_CHAR_ENC_LOCAL 0x00000000U /* strings are in the local character encoding */ 385 #define PCAP_CHAR_ENC_UTF_8 0x00000001U /* strings are in UTF-8 */ 386 387 PCAP_AVAILABLE_1_10 388 PCAP_API int pcap_init(unsigned int, char *); 389 390 /* 391 * We're deprecating pcap_lookupdev() for various reasons (not 392 * thread-safe, can behave weirdly with WinPcap). Callers 393 * should use pcap_findalldevs() and use the first device. 394 */ 395 PCAP_AVAILABLE_0_4 396 PCAP_API char *pcap_lookupdev(char *) 397 PCAP_DEPRECATED(pcap_lookupdev, "use 'pcap_findalldevs' and use the first device"); 398 399 PCAP_AVAILABLE_0_4 400 PCAP_API int pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *); 401 402 PCAP_AVAILABLE_1_0 403 PCAP_API pcap_t *pcap_create(const char *, char *); 404 405 PCAP_AVAILABLE_1_0 406 PCAP_API int pcap_set_snaplen(pcap_t *, int); 407 408 PCAP_AVAILABLE_1_0 409 PCAP_API int pcap_set_promisc(pcap_t *, int); 410 411 PCAP_AVAILABLE_1_0 412 PCAP_API int pcap_can_set_rfmon(pcap_t *); 413 414 PCAP_AVAILABLE_1_0 415 PCAP_API int pcap_set_rfmon(pcap_t *, int); 416 417 PCAP_AVAILABLE_1_0 418 PCAP_API int pcap_set_timeout(pcap_t *, int); 419 420 PCAP_AVAILABLE_1_2 421 PCAP_API int pcap_set_tstamp_type(pcap_t *, int); 422 423 PCAP_AVAILABLE_1_5 424 PCAP_API int pcap_set_immediate_mode(pcap_t *, int); 425 426 PCAP_AVAILABLE_1_0 427 PCAP_API int pcap_set_buffer_size(pcap_t *, int); 428 429 PCAP_AVAILABLE_1_5 430 PCAP_API int pcap_set_tstamp_precision(pcap_t *, int); 431 432 PCAP_AVAILABLE_1_5 433 PCAP_API int pcap_get_tstamp_precision(pcap_t *); 434 435 PCAP_AVAILABLE_1_0 436 PCAP_API int pcap_activate(pcap_t *); 437 438 PCAP_AVAILABLE_1_2 439 PCAP_API int pcap_list_tstamp_types(pcap_t *, int **); 440 441 PCAP_AVAILABLE_1_2 442 PCAP_API void pcap_free_tstamp_types(int *); 443 444 PCAP_AVAILABLE_1_2 445 PCAP_API int pcap_tstamp_type_name_to_val(const char *); 446 447 PCAP_AVAILABLE_1_2 448 PCAP_API const char *pcap_tstamp_type_val_to_name(int); 449 450 PCAP_AVAILABLE_1_2 451 PCAP_API const char *pcap_tstamp_type_val_to_description(int); 452 453 #ifdef __linux__ 454 PCAP_AVAILABLE_1_9 455 PCAP_API int pcap_set_protocol_linux(pcap_t *, int); 456 #endif 457 458 /* 459 * Time stamp types. 460 * Not all systems and interfaces will necessarily support all of these. 461 * 462 * A system that supports PCAP_TSTAMP_HOST is offering time stamps 463 * provided by the host machine, rather than by the capture device, 464 * but not committing to any characteristics of the time stamp. 465 * 466 * PCAP_TSTAMP_HOST_LOWPREC is a time stamp, provided by the host machine, 467 * that's low-precision but relatively cheap to fetch; it's normally done 468 * using the system clock, so it's normally synchronized with times you'd 469 * fetch from system calls. 470 * 471 * PCAP_TSTAMP_HOST_HIPREC is a time stamp, provided by the host machine, 472 * that's high-precision; it might be more expensive to fetch. It is 473 * synchronized with the system clock. 474 * 475 * PCAP_TSTAMP_HOST_HIPREC_UNSYNCED is a time stamp, provided by the host 476 * machine, that's high-precision; it might be more expensive to fetch. 477 * It is not synchronized with the system clock, and might have 478 * problems with time stamps for packets received on different CPUs, 479 * depending on the platform. It might be more likely to be strictly 480 * monotonic than PCAP_TSTAMP_HOST_HIPREC. 481 * 482 * PCAP_TSTAMP_ADAPTER is a high-precision time stamp supplied by the 483 * capture device; it's synchronized with the system clock. 484 * 485 * PCAP_TSTAMP_ADAPTER_UNSYNCED is a high-precision time stamp supplied by 486 * the capture device; it's not synchronized with the system clock. 487 * 488 * Note that time stamps synchronized with the system clock can go 489 * backwards, as the system clock can go backwards. If a clock is 490 * not in sync with the system clock, that could be because the 491 * system clock isn't keeping accurate time, because the other 492 * clock isn't keeping accurate time, or both. 493 * 494 * Note that host-provided time stamps generally correspond to the 495 * time when the time-stamping code sees the packet; this could 496 * be some unknown amount of time after the first or last bit of 497 * the packet is received by the network adapter, due to batching 498 * of interrupts for packet arrival, queueing delays, etc.. 499 */ 500 #define PCAP_TSTAMP_HOST 0 /* host-provided, unknown characteristics */ 501 #define PCAP_TSTAMP_HOST_LOWPREC 1 /* host-provided, low precision, synced with the system clock */ 502 #define PCAP_TSTAMP_HOST_HIPREC 2 /* host-provided, high precision, synced with the system clock */ 503 #define PCAP_TSTAMP_ADAPTER 3 /* device-provided, synced with the system clock */ 504 #define PCAP_TSTAMP_ADAPTER_UNSYNCED 4 /* device-provided, not synced with the system clock */ 505 #define PCAP_TSTAMP_HOST_HIPREC_UNSYNCED 5 /* host-provided, high precision, not synced with the system clock */ 506 507 /* 508 * Time stamp resolution types. 509 * Not all systems and interfaces will necessarily support all of these 510 * resolutions when doing live captures; all of them can be requested 511 * when reading a savefile. 512 */ 513 #define PCAP_TSTAMP_PRECISION_MICRO 0 /* use timestamps with microsecond precision, default */ 514 #define PCAP_TSTAMP_PRECISION_NANO 1 /* use timestamps with nanosecond precision */ 515 516 PCAP_AVAILABLE_0_4 517 PCAP_API pcap_t *pcap_open_live(const char *, int, int, int, char *); 518 519 PCAP_AVAILABLE_0_6 520 PCAP_API pcap_t *pcap_open_dead(int, int); 521 522 PCAP_AVAILABLE_1_5 523 PCAP_API pcap_t *pcap_open_dead_with_tstamp_precision(int, int, u_int); 524 525 PCAP_AVAILABLE_1_5 526 PCAP_API pcap_t *pcap_open_offline_with_tstamp_precision(const char *, u_int, char *); 527 528 PCAP_AVAILABLE_0_4 529 PCAP_API pcap_t *pcap_open_offline(const char *, char *); 530 531 #ifdef _WIN32 532 PCAP_AVAILABLE_1_5 533 PCAP_API pcap_t *pcap_hopen_offline_with_tstamp_precision(intptr_t, u_int, char *); 534 535 PCAP_API pcap_t *pcap_hopen_offline(intptr_t, char *); 536 /* 537 * If we're building libpcap, these are internal routines in savefile.c, 538 * so we must not define them as macros. 539 * 540 * If we're not building libpcap, given that the version of the C runtime 541 * with which libpcap was built might be different from the version 542 * of the C runtime with which an application using libpcap was built, 543 * and that a FILE structure may differ between the two versions of the 544 * C runtime, calls to _fileno() must use the version of _fileno() in 545 * the C runtime used to open the FILE *, not the version in the C 546 * runtime with which libpcap was built. (Maybe once the Universal CRT 547 * rules the world, this will cease to be a problem.) 548 */ 549 #ifndef BUILDING_PCAP 550 #define pcap_fopen_offline_with_tstamp_precision(f,p,b) \ 551 pcap_hopen_offline_with_tstamp_precision(_get_osfhandle(_fileno(f)), p, b) 552 #define pcap_fopen_offline(f,b) \ 553 pcap_hopen_offline(_get_osfhandle(_fileno(f)), b) 554 #endif 555 #else /*_WIN32*/ 556 PCAP_AVAILABLE_1_5 557 PCAP_API pcap_t *pcap_fopen_offline_with_tstamp_precision(FILE *, u_int, char *); 558 559 PCAP_AVAILABLE_0_9 560 PCAP_API pcap_t *pcap_fopen_offline(FILE *, char *); 561 #endif /*_WIN32*/ 562 563 PCAP_AVAILABLE_0_4 564 PCAP_API void pcap_close(pcap_t *); 565 566 PCAP_AVAILABLE_0_4 567 PCAP_API int pcap_loop(pcap_t *, int, pcap_handler, u_char *); 568 569 PCAP_AVAILABLE_0_4 570 PCAP_API int pcap_dispatch(pcap_t *, int, pcap_handler, u_char *); 571 572 PCAP_AVAILABLE_0_4 573 PCAP_API const u_char *pcap_next(pcap_t *, struct pcap_pkthdr *); 574 575 PCAP_AVAILABLE_0_8 576 PCAP_API int pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **); 577 578 PCAP_AVAILABLE_0_8 579 PCAP_API void pcap_breakloop(pcap_t *); 580 581 PCAP_AVAILABLE_0_4 582 PCAP_API int pcap_stats(pcap_t *, struct pcap_stat *); 583 584 PCAP_AVAILABLE_0_4 585 PCAP_API int pcap_setfilter(pcap_t *, struct bpf_program *); 586 587 PCAP_AVAILABLE_0_9 588 PCAP_API int pcap_setdirection(pcap_t *, pcap_direction_t); 589 590 PCAP_AVAILABLE_0_7 591 PCAP_API int pcap_getnonblock(pcap_t *, char *); 592 593 PCAP_AVAILABLE_0_7 594 PCAP_API int pcap_setnonblock(pcap_t *, int, char *); 595 596 PCAP_AVAILABLE_0_9 597 PCAP_API int pcap_inject(pcap_t *, const void *, size_t); 598 599 PCAP_AVAILABLE_0_8 600 PCAP_API int pcap_sendpacket(pcap_t *, const u_char *, int); 601 602 PCAP_AVAILABLE_1_0 603 PCAP_API const char *pcap_statustostr(int); 604 605 PCAP_AVAILABLE_0_4 606 PCAP_API const char *pcap_strerror(int); 607 608 PCAP_AVAILABLE_0_4 609 PCAP_API char *pcap_geterr(pcap_t *); 610 611 PCAP_AVAILABLE_0_4 612 PCAP_API void pcap_perror(pcap_t *, const char *); 613 614 PCAP_AVAILABLE_0_4 615 PCAP_API int pcap_compile(pcap_t *, struct bpf_program *, const char *, int, 616 bpf_u_int32); 617 618 PCAP_AVAILABLE_0_5 619 PCAP_API int pcap_compile_nopcap(int, int, struct bpf_program *, 620 const char *, int, bpf_u_int32); 621 622 /* XXX - this took two arguments in 0.4 and 0.5 */ 623 PCAP_AVAILABLE_0_6 624 PCAP_API void pcap_freecode(struct bpf_program *); 625 626 PCAP_AVAILABLE_1_0 627 PCAP_API int pcap_offline_filter(const struct bpf_program *, 628 const struct pcap_pkthdr *, const u_char *); 629 630 PCAP_AVAILABLE_0_4 631 PCAP_API int pcap_datalink(pcap_t *); 632 633 PCAP_AVAILABLE_1_0 634 PCAP_API int pcap_datalink_ext(pcap_t *); 635 636 PCAP_AVAILABLE_0_8 637 PCAP_API int pcap_list_datalinks(pcap_t *, int **); 638 639 PCAP_AVAILABLE_0_8 640 PCAP_API int pcap_set_datalink(pcap_t *, int); 641 642 PCAP_AVAILABLE_0_8 643 PCAP_API void pcap_free_datalinks(int *); 644 645 PCAP_AVAILABLE_0_8 646 PCAP_API int pcap_datalink_name_to_val(const char *); 647 648 PCAP_AVAILABLE_0_8 649 PCAP_API const char *pcap_datalink_val_to_name(int); 650 651 PCAP_AVAILABLE_0_8 652 PCAP_API const char *pcap_datalink_val_to_description(int); 653 654 PCAP_AVAILABLE_1_10 655 PCAP_API const char *pcap_datalink_val_to_description_or_dlt(int); 656 657 PCAP_AVAILABLE_0_4 658 PCAP_API int pcap_snapshot(pcap_t *); 659 660 PCAP_AVAILABLE_0_4 661 PCAP_API int pcap_is_swapped(pcap_t *); 662 663 PCAP_AVAILABLE_0_4 664 PCAP_API int pcap_major_version(pcap_t *); 665 666 PCAP_AVAILABLE_0_4 667 PCAP_API int pcap_minor_version(pcap_t *); 668 669 PCAP_AVAILABLE_1_9 670 PCAP_API int pcap_bufsize(pcap_t *); 671 672 /* XXX */ 673 PCAP_AVAILABLE_0_4 674 PCAP_API FILE *pcap_file(pcap_t *); 675 676 #ifdef _WIN32 677 /* 678 * This probably shouldn't have been kept in WinPcap; most if not all 679 * UN*X code that used it won't work on Windows. We deprecate it; if 680 * anybody really needs access to whatever HANDLE may be associated 681 * with a pcap_t (there's no guarantee that there is one), we can add 682 * a Windows-only pcap_handle() API that returns the HANDLE. 683 */ 684 PCAP_AVAILABLE_0_4 685 PCAP_API int pcap_fileno(pcap_t *) 686 PCAP_DEPRECATED(pcap_fileno, "use 'pcap_handle'"); 687 #else /* _WIN32 */ 688 PCAP_AVAILABLE_0_4 689 PCAP_API int pcap_fileno(pcap_t *); 690 #endif /* _WIN32 */ 691 692 #ifdef _WIN32 693 PCAP_API int pcap_wsockinit(void); 694 #endif 695 696 PCAP_AVAILABLE_0_4 697 PCAP_API pcap_dumper_t *pcap_dump_open(pcap_t *, const char *); 698 699 #ifdef _WIN32 700 PCAP_AVAILABLE_0_9 701 PCAP_API pcap_dumper_t *pcap_dump_hopen(pcap_t *, intptr_t); 702 703 /* 704 * If we're building libpcap, this is an internal routine in sf-pcap.c, so 705 * we must not define it as a macro. 706 * 707 * If we're not building libpcap, given that the version of the C runtime 708 * with which libpcap was built might be different from the version 709 * of the C runtime with which an application using libpcap was built, 710 * and that a FILE structure may differ between the two versions of the 711 * C runtime, calls to _fileno() must use the version of _fileno() in 712 * the C runtime used to open the FILE *, not the version in the C 713 * runtime with which libpcap was built. (Maybe once the Universal CRT 714 * rules the world, this will cease to be a problem.) 715 */ 716 #ifndef BUILDING_PCAP 717 #define pcap_dump_fopen(p,f) \ 718 pcap_dump_hopen(p, _get_osfhandle(_fileno(f))) 719 #endif 720 #else /*_WIN32*/ 721 PCAP_AVAILABLE_0_9 722 PCAP_API pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp); 723 #endif /*_WIN32*/ 724 725 PCAP_AVAILABLE_1_7 726 PCAP_API pcap_dumper_t *pcap_dump_open_append(pcap_t *, const char *); 727 728 PCAP_AVAILABLE_0_8 729 PCAP_API FILE *pcap_dump_file(pcap_dumper_t *); 730 731 PCAP_AVAILABLE_0_9 732 PCAP_API long pcap_dump_ftell(pcap_dumper_t *); 733 734 PCAP_AVAILABLE_1_9 735 PCAP_API int64_t pcap_dump_ftell64(pcap_dumper_t *); 736 737 PCAP_AVAILABLE_0_8 738 PCAP_API int pcap_dump_flush(pcap_dumper_t *); 739 740 PCAP_AVAILABLE_0_4 741 PCAP_API void pcap_dump_close(pcap_dumper_t *); 742 743 PCAP_AVAILABLE_0_4 744 PCAP_API void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *); 745 746 PCAP_AVAILABLE_0_7 747 PCAP_API int pcap_findalldevs(pcap_if_t **, char *); 748 749 PCAP_AVAILABLE_0_7 750 PCAP_API void pcap_freealldevs(pcap_if_t *); 751 752 /* 753 * We return a pointer to the version string, rather than exporting the 754 * version string directly. 755 * 756 * On at least some UNIXes, if you import data from a shared library into 757 * a program, the data is bound into the program binary, so if the string 758 * in the version of the library with which the program was linked isn't 759 * the same as the string in the version of the library with which the 760 * program is being run, various undesirable things may happen (warnings, 761 * the string being the one from the version of the library with which the 762 * program was linked, or even weirder things, such as the string being the 763 * one from the library but being truncated). 764 * 765 * On Windows, the string is constructed at run time. 766 */ 767 PCAP_AVAILABLE_0_8 768 PCAP_API const char *pcap_lib_version(void); 769 770 #if defined(_WIN32) 771 772 /* 773 * Win32 definitions 774 */ 775 776 /*! 777 \brief A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit(). 778 */ 779 struct pcap_send_queue 780 { 781 u_int maxlen; /* Maximum size of the queue, in bytes. This 782 variable contains the size of the buffer field. */ 783 u_int len; /* Current size of the queue, in bytes. */ 784 char *buffer; /* Buffer containing the packets to be sent. */ 785 }; 786 787 typedef struct pcap_send_queue pcap_send_queue; 788 789 /*! 790 \brief This typedef is a support for the pcap_get_airpcap_handle() function 791 */ 792 #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_) 793 #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_ 794 typedef struct _AirpcapHandle *PAirpcapHandle; 795 #endif 796 797 PCAP_API int pcap_setbuff(pcap_t *p, int dim); 798 PCAP_API int pcap_setmode(pcap_t *p, int mode); 799 PCAP_API int pcap_setmintocopy(pcap_t *p, int size); 800 801 PCAP_API HANDLE pcap_getevent(pcap_t *p); 802 803 PCAP_AVAILABLE_1_8 804 PCAP_API int pcap_oid_get_request(pcap_t *, bpf_u_int32, void *, size_t *); 805 806 PCAP_AVAILABLE_1_8 807 PCAP_API int pcap_oid_set_request(pcap_t *, bpf_u_int32, const void *, size_t *); 808 809 PCAP_API pcap_send_queue* pcap_sendqueue_alloc(u_int memsize); 810 811 PCAP_API void pcap_sendqueue_destroy(pcap_send_queue* queue); 812 813 PCAP_API int pcap_sendqueue_queue(pcap_send_queue* queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data); 814 815 PCAP_API u_int pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue* queue, int sync); 816 817 PCAP_API struct pcap_stat *pcap_stats_ex(pcap_t *p, int *pcap_stat_size); 818 819 PCAP_API int pcap_setuserbuffer(pcap_t *p, int size); 820 821 PCAP_API int pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks); 822 823 PCAP_API int pcap_live_dump_ended(pcap_t *p, int sync); 824 825 PCAP_API int pcap_start_oem(char* err_str, int flags); 826 827 PCAP_API PAirpcapHandle pcap_get_airpcap_handle(pcap_t *p); 828 829 #define MODE_CAPT 0 830 #define MODE_STAT 1 831 #define MODE_MON 2 832 833 #elif defined(MSDOS) 834 835 /* 836 * MS-DOS definitions 837 */ 838 839 PCAP_API int pcap_stats_ex (pcap_t *, struct pcap_stat_ex *); 840 PCAP_API void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait); 841 PCAP_API u_long pcap_mac_packets (void); 842 843 #else /* UN*X */ 844 845 /* 846 * UN*X definitions 847 */ 848 849 PCAP_AVAILABLE_0_8 850 PCAP_API int pcap_get_selectable_fd(pcap_t *); 851 852 PCAP_AVAILABLE_1_9 853 PCAP_API const struct timeval *pcap_get_required_select_timeout(pcap_t *); 854 855 #endif /* _WIN32/MSDOS/UN*X */ 856 857 /* 858 * Remote capture definitions. 859 * 860 * These routines are only present if libpcap has been configured to 861 * include remote capture support. 862 */ 863 864 /* 865 * The maximum buffer size in which address, port, interface names are kept. 866 * 867 * In case the adapter name or such is larger than this value, it is truncated. 868 * This is not used by the user; however it must be aware that an hostname / interface 869 * name longer than this value will be truncated. 870 */ 871 #define PCAP_BUF_SIZE 1024 872 873 /* 874 * The type of input source, passed to pcap_open(). 875 */ 876 #define PCAP_SRC_FILE 2 /* local savefile */ 877 #define PCAP_SRC_IFLOCAL 3 /* local network interface */ 878 #define PCAP_SRC_IFREMOTE 4 /* interface on a remote host, using RPCAP */ 879 880 /* 881 * The formats allowed by pcap_open() are the following: 882 * - file://path_and_filename [opens a local file] 883 * - rpcap://devicename [opens the selected device devices available on the local host, without using the RPCAP protocol] 884 * - rpcap://host/devicename [opens the selected device available on a remote host] 885 * - rpcap://host:port/devicename [opens the selected device available on a remote host, using a non-standard port for RPCAP] 886 * - adaptername [to open a local adapter; kept for compatibility, but it is strongly discouraged] 887 * - (NULL) [to open the first local adapter; kept for compatibility, but it is strongly discouraged] 888 * 889 * The formats allowed by the pcap_findalldevs_ex() are the following: 890 * - file://folder/ [lists all the files in the given folder] 891 * - rpcap:// [lists all local adapters] 892 * - rpcap://host:port/ [lists the devices available on a remote host] 893 * 894 * In all the above, "rpcaps://" can be substituted for "rpcap://" to enable 895 * SSL (if it has been compiled in). 896 * 897 * Referring to the 'host' and 'port' parameters, they can be either numeric or literal. Since 898 * IPv6 is fully supported, these are the allowed formats: 899 * 900 * - host (literal): e.g. host.foo.bar 901 * - host (numeric IPv4): e.g. 10.11.12.13 902 * - host (numeric IPv4, IPv6 style): e.g. [10.11.12.13] 903 * - host (numeric IPv6): e.g. [1:2:3::4] 904 * - port: can be either numeric (e.g. '80') or literal (e.g. 'http') 905 * 906 * Here you find some allowed examples: 907 * - rpcap://host.foo.bar/devicename [everything literal, no port number] 908 * - rpcap://host.foo.bar:1234/devicename [everything literal, with port number] 909 * - rpcap://10.11.12.13/devicename [IPv4 numeric, no port number] 910 * - rpcap://10.11.12.13:1234/devicename [IPv4 numeric, with port number] 911 * - rpcap://[10.11.12.13]:1234/devicename [IPv4 numeric with IPv6 format, with port number] 912 * - rpcap://[1:2:3::4]/devicename [IPv6 numeric, no port number] 913 * - rpcap://[1:2:3::4]:1234/devicename [IPv6 numeric, with port number] 914 * - rpcap://[1:2:3::4]:http/devicename [IPv6 numeric, with literal port number] 915 */ 916 917 /* 918 * URL schemes for capture source. 919 */ 920 /* 921 * This string indicates that the user wants to open a capture from a 922 * local file. 923 */ 924 #define PCAP_SRC_FILE_STRING "file://" 925 /* 926 * This string indicates that the user wants to open a capture from a 927 * network interface. This string does not necessarily involve the use 928 * of the RPCAP protocol. If the interface required resides on the local 929 * host, the RPCAP protocol is not involved and the local functions are used. 930 */ 931 #define PCAP_SRC_IF_STRING "rpcap://" 932 933 /* 934 * Flags to pass to pcap_open(). 935 */ 936 937 /* 938 * Specifies whether promiscuous mode is to be used. 939 */ 940 #define PCAP_OPENFLAG_PROMISCUOUS 0x00000001 941 942 /* 943 * Specifies, for an RPCAP capture, whether the data transfer (in 944 * case of a remote capture) has to be done with UDP protocol. 945 * 946 * If it is '1' if you want a UDP data connection, '0' if you want 947 * a TCP data connection; control connection is always TCP-based. 948 * A UDP connection is much lighter, but it does not guarantee that all 949 * the captured packets arrive to the client workstation. Moreover, 950 * it could be harmful in case of network congestion. 951 * This flag is meaningless if the source is not a remote interface. 952 * In that case, it is simply ignored. 953 */ 954 #define PCAP_OPENFLAG_DATATX_UDP 0x00000002 955 956 /* 957 * Specifies whether the remote probe will capture its own generated 958 * traffic. 959 * 960 * In case the remote probe uses the same interface to capture traffic 961 * and to send data back to the caller, the captured traffic includes 962 * the RPCAP traffic as well. If this flag is turned on, the RPCAP 963 * traffic is excluded from the capture, so that the trace returned 964 * back to the collector is does not include this traffic. 965 * 966 * Has no effect on local interfaces or savefiles. 967 */ 968 #define PCAP_OPENFLAG_NOCAPTURE_RPCAP 0x00000004 969 970 /* 971 * Specifies whether the local adapter will capture its own generated traffic. 972 * 973 * This flag tells the underlying capture driver to drop the packets 974 * that were sent by itself. This is useful when building applications 975 * such as bridges that should ignore the traffic they just sent. 976 * 977 * Supported only on Windows. 978 */ 979 #define PCAP_OPENFLAG_NOCAPTURE_LOCAL 0x00000008 980 981 /* 982 * This flag configures the adapter for maximum responsiveness. 983 * 984 * In presence of a large value for nbytes, WinPcap waits for the arrival 985 * of several packets before copying the data to the user. This guarantees 986 * a low number of system calls, i.e. lower processor usage, i.e. better 987 * performance, which is good for applications like sniffers. If the user 988 * sets the PCAP_OPENFLAG_MAX_RESPONSIVENESS flag, the capture driver will 989 * copy the packets as soon as the application is ready to receive them. 990 * This is suggested for real time applications (such as, for example, 991 * a bridge) that need the best responsiveness. 992 * 993 * The equivalent with pcap_create()/pcap_activate() is "immediate mode". 994 */ 995 #define PCAP_OPENFLAG_MAX_RESPONSIVENESS 0x00000010 996 997 /* 998 * Remote authentication methods. 999 * These are used in the 'type' member of the pcap_rmtauth structure. 1000 */ 1001 1002 /* 1003 * NULL authentication. 1004 * 1005 * The 'NULL' authentication has to be equal to 'zero', so that old 1006 * applications can just put every field of struct pcap_rmtauth to zero, 1007 * and it does work. 1008 */ 1009 #define RPCAP_RMTAUTH_NULL 0 1010 /* 1011 * Username/password authentication. 1012 * 1013 * With this type of authentication, the RPCAP protocol will use the username/ 1014 * password provided to authenticate the user on the remote machine. If the 1015 * authentication is successful (and the user has the right to open network 1016 * devices) the RPCAP connection will continue; otherwise it will be dropped. 1017 * 1018 * *******NOTE********: the username and password are sent over the network 1019 * to the capture server *IN CLEAR TEXT*. Don't use this on a network 1020 * that you don't completely control! (And be *really* careful in your 1021 * 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