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 #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_API char *pcap_lookupdev(char *) 395 PCAP_DEPRECATED(pcap_lookupdev, "use 'pcap_findalldevs' and use the first device"); 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_API int pcap_compile_nopcap(int, int, struct bpf_program *, 618 const char *, int, bpf_u_int32); 619 620 /* XXX - this took two arguments in 0.4 and 0.5 */ 621 PCAP_AVAILABLE_0_6 622 PCAP_API void pcap_freecode(struct bpf_program *); 623 624 PCAP_AVAILABLE_1_0 625 PCAP_API int pcap_offline_filter(const struct bpf_program *, 626 const struct pcap_pkthdr *, const u_char *); 627 628 PCAP_AVAILABLE_0_4 629 PCAP_API int pcap_datalink(pcap_t *); 630 631 PCAP_AVAILABLE_1_0 632 PCAP_API int pcap_datalink_ext(pcap_t *); 633 634 PCAP_AVAILABLE_0_8 635 PCAP_API int pcap_list_datalinks(pcap_t *, int **); 636 637 PCAP_AVAILABLE_0_8 638 PCAP_API int pcap_set_datalink(pcap_t *, int); 639 640 PCAP_AVAILABLE_0_8 641 PCAP_API void pcap_free_datalinks(int *); 642 643 PCAP_AVAILABLE_0_8 644 PCAP_API int pcap_datalink_name_to_val(const char *); 645 646 PCAP_AVAILABLE_0_8 647 PCAP_API const char *pcap_datalink_val_to_name(int); 648 649 PCAP_AVAILABLE_0_8 650 PCAP_API const char *pcap_datalink_val_to_description(int); 651 652 PCAP_AVAILABLE_1_10 653 PCAP_API const char *pcap_datalink_val_to_description_or_dlt(int); 654 655 PCAP_AVAILABLE_0_4 656 PCAP_API int pcap_snapshot(pcap_t *); 657 658 PCAP_AVAILABLE_0_4 659 PCAP_API int pcap_is_swapped(pcap_t *); 660 661 PCAP_AVAILABLE_0_4 662 PCAP_API int pcap_major_version(pcap_t *); 663 664 PCAP_AVAILABLE_0_4 665 PCAP_API int pcap_minor_version(pcap_t *); 666 667 PCAP_AVAILABLE_1_9 668 PCAP_API int pcap_bufsize(pcap_t *); 669 670 /* XXX */ 671 PCAP_AVAILABLE_0_4 672 PCAP_API FILE *pcap_file(pcap_t *); 673 674 #ifdef _WIN32 675 /* 676 * This probably shouldn't have been kept in WinPcap; most if not all 677 * UN*X code that used it won't work on Windows. We deprecate it; if 678 * anybody really needs access to whatever HANDLE may be associated 679 * with a pcap_t (there's no guarantee that there is one), we can add 680 * a Windows-only pcap_handle() API that returns the HANDLE. 681 */ 682 PCAP_AVAILABLE_0_4 683 PCAP_API int pcap_fileno(pcap_t *) 684 PCAP_DEPRECATED(pcap_fileno, "use 'pcap_handle'"); 685 #else /* _WIN32 */ 686 PCAP_AVAILABLE_0_4 687 PCAP_API int pcap_fileno(pcap_t *); 688 #endif /* _WIN32 */ 689 690 #ifdef _WIN32 691 PCAP_API int pcap_wsockinit(void); 692 #endif 693 694 PCAP_AVAILABLE_0_4 695 PCAP_API pcap_dumper_t *pcap_dump_open(pcap_t *, const char *); 696 697 #ifdef _WIN32 698 PCAP_AVAILABLE_0_9 699 PCAP_API pcap_dumper_t *pcap_dump_hopen(pcap_t *, intptr_t); 700 701 /* 702 * If we're building libpcap, this is an internal routine in sf-pcap.c, so 703 * we must not define it as a macro. 704 * 705 * If we're not building libpcap, given that the version of the C runtime 706 * with which libpcap was built might be different from the version 707 * of the C runtime with which an application using libpcap was built, 708 * and that a FILE structure may differ between the two versions of the 709 * C runtime, calls to _fileno() must use the version of _fileno() in 710 * the C runtime used to open the FILE *, not the version in the C 711 * runtime with which libpcap was built. (Maybe once the Universal CRT 712 * rules the world, this will cease to be a problem.) 713 */ 714 #ifndef BUILDING_PCAP 715 #define pcap_dump_fopen(p,f) \ 716 pcap_dump_hopen(p, _get_osfhandle(_fileno(f))) 717 #endif 718 #else /*_WIN32*/ 719 PCAP_AVAILABLE_0_9 720 PCAP_API pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp); 721 #endif /*_WIN32*/ 722 723 PCAP_AVAILABLE_1_7 724 PCAP_API pcap_dumper_t *pcap_dump_open_append(pcap_t *, const char *); 725 726 PCAP_AVAILABLE_0_8 727 PCAP_API FILE *pcap_dump_file(pcap_dumper_t *); 728 729 PCAP_AVAILABLE_0_9 730 PCAP_API long pcap_dump_ftell(pcap_dumper_t *); 731 732 PCAP_AVAILABLE_1_9 733 PCAP_API int64_t pcap_dump_ftell64(pcap_dumper_t *); 734 735 PCAP_AVAILABLE_0_8 736 PCAP_API int pcap_dump_flush(pcap_dumper_t *); 737 738 PCAP_AVAILABLE_0_4 739 PCAP_API void pcap_dump_close(pcap_dumper_t *); 740 741 PCAP_AVAILABLE_0_4 742 PCAP_API void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *); 743 744 PCAP_AVAILABLE_0_7 745 PCAP_API int pcap_findalldevs(pcap_if_t **, char *); 746 747 PCAP_AVAILABLE_0_7 748 PCAP_API void pcap_freealldevs(pcap_if_t *); 749 750 /* 751 * We return a pointer to the version string, rather than exporting the 752 * version string directly. 753 * 754 * On at least some UNIXes, if you import data from a shared library into 755 * a program, the data is bound into the program binary, so if the string 756 * in the version of the library with which the program was linked isn't 757 * the same as the string in the version of the library with which the 758 * program is being run, various undesirable things may happen (warnings, 759 * the string being the one from the version of the library with which the 760 * program was linked, or even weirder things, such as the string being the 761 * one from the library but being truncated). 762 * 763 * On Windows, the string is constructed at run time. 764 */ 765 PCAP_AVAILABLE_0_8 766 PCAP_API const char *pcap_lib_version(void); 767 768 #if defined(_WIN32) 769 770 /* 771 * Win32 definitions 772 */ 773 774 /*! 775 \brief A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit(). 776 */ 777 struct pcap_send_queue 778 { 779 u_int maxlen; /* Maximum size of the queue, in bytes. This 780 variable contains the size of the buffer field. */ 781 u_int len; /* Current size of the queue, in bytes. */ 782 char *buffer; /* Buffer containing the packets to be sent. */ 783 }; 784 785 typedef struct pcap_send_queue pcap_send_queue; 786 787 /*! 788 \brief This typedef is a support for the pcap_get_airpcap_handle() function 789 */ 790 #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_) 791 #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_ 792 typedef struct _AirpcapHandle *PAirpcapHandle; 793 #endif 794 795 PCAP_API int pcap_setbuff(pcap_t *p, int dim); 796 PCAP_API int pcap_setmode(pcap_t *p, int mode); 797 PCAP_API int pcap_setmintocopy(pcap_t *p, int size); 798 799 PCAP_API HANDLE pcap_getevent(pcap_t *p); 800 801 PCAP_AVAILABLE_1_8 802 PCAP_API int pcap_oid_get_request(pcap_t *, bpf_u_int32, void *, size_t *); 803 804 PCAP_AVAILABLE_1_8 805 PCAP_API int pcap_oid_set_request(pcap_t *, bpf_u_int32, const void *, size_t *); 806 807 PCAP_API pcap_send_queue* pcap_sendqueue_alloc(u_int memsize); 808 809 PCAP_API void pcap_sendqueue_destroy(pcap_send_queue* queue); 810 811 PCAP_API int pcap_sendqueue_queue(pcap_send_queue* queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data); 812 813 PCAP_API u_int pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue* queue, int sync); 814 815 PCAP_API struct pcap_stat *pcap_stats_ex(pcap_t *p, int *pcap_stat_size); 816 817 PCAP_API int pcap_setuserbuffer(pcap_t *p, int size); 818 819 PCAP_API int pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks); 820 821 PCAP_API int pcap_live_dump_ended(pcap_t *p, int sync); 822 823 PCAP_API int pcap_start_oem(char* err_str, int flags); 824 825 PCAP_API PAirpcapHandle pcap_get_airpcap_handle(pcap_t *p); 826 827 #define MODE_CAPT 0 828 #define MODE_STAT 1 829 #define MODE_MON 2 830 831 #elif defined(MSDOS) 832 833 /* 834 * MS-DOS definitions 835 */ 836 837 PCAP_API int pcap_stats_ex (pcap_t *, struct pcap_stat_ex *); 838 PCAP_API void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait); 839 PCAP_API u_long pcap_mac_packets (void); 840 841 #else /* UN*X */ 842 843 /* 844 * UN*X definitions 845 */ 846 847 PCAP_AVAILABLE_0_8 848 PCAP_API int pcap_get_selectable_fd(pcap_t *); 849 850 PCAP_AVAILABLE_1_9 851 PCAP_API const struct timeval *pcap_get_required_select_timeout(pcap_t *); 852 853 #endif /* _WIN32/MSDOS/UN*X */ 854 855 /* 856 * Remote capture definitions. 857 * 858 * These routines are only present if libpcap has been configured to 859 * include remote capture support. 860 */ 861 862 /* 863 * The maximum buffer size in which address, port, interface names are kept. 864 * 865 * In case the adapter name or such is larger than this value, it is truncated. 866 * This is not used by the user; however it must be aware that an hostname / interface 867 * name longer than this value will be truncated. 868 */ 869 #define PCAP_BUF_SIZE 1024 870 871 /* 872 * The type of input source, passed to pcap_open(). 873 */ 874 #define PCAP_SRC_FILE 2 /* local savefile */ 875 #define PCAP_SRC_IFLOCAL 3 /* local network interface */ 876 #define PCAP_SRC_IFREMOTE 4 /* interface on a remote host, using RPCAP */ 877 878 /* 879 * The formats allowed by pcap_open() are the following: 880 * - file://path_and_filename [opens a local file] 881 * - rpcap://devicename [opens the selected device devices available on the local host, without using the RPCAP protocol] 882 * - rpcap://host/devicename [opens the selected device available on a remote host] 883 * - rpcap://host:port/devicename [opens the selected device available on a remote host, using a non-standard port for RPCAP] 884 * - adaptername [to open a local adapter; kept for compatibility, but it is strongly discouraged] 885 * - (NULL) [to open the first local adapter; kept for compatibility, but it is strongly discouraged] 886 * 887 * The formats allowed by the pcap_findalldevs_ex() are the following: 888 * - file://folder/ [lists all the files in the given folder] 889 * - rpcap:// [lists all local adapters] 890 * - rpcap://host:port/ [lists the devices available on a remote host] 891 * 892 * In all the above, "rpcaps://" can be substituted for "rpcap://" to enable 893 * SSL (if it has been compiled in). 894 * 895 * Referring to the 'host' and 'port' parameters, they can be either numeric or literal. Since 896 * IPv6 is fully supported, these are the allowed formats: 897 * 898 * - host (literal): e.g. host.foo.bar 899 * - host (numeric IPv4): e.g. 10.11.12.13 900 * - host (numeric IPv4, IPv6 style): e.g. [10.11.12.13] 901 * - host (numeric IPv6): e.g. [1:2:3::4] 902 * - port: can be either numeric (e.g. '80') or literal (e.g. 'http') 903 * 904 * Here you find some allowed examples: 905 * - rpcap://host.foo.bar/devicename [everything literal, no port number] 906 * - rpcap://host.foo.bar:1234/devicename [everything literal, with port number] 907 * - rpcap://10.11.12.13/devicename [IPv4 numeric, no port number] 908 * - rpcap://10.11.12.13:1234/devicename [IPv4 numeric, with port number] 909 * - rpcap://[10.11.12.13]:1234/devicename [IPv4 numeric with IPv6 format, with port number] 910 * - rpcap://[1:2:3::4]/devicename [IPv6 numeric, no port number] 911 * - rpcap://[1:2:3::4]:1234/devicename [IPv6 numeric, with port number] 912 * - rpcap://[1:2:3::4]:http/devicename [IPv6 numeric, with literal port number] 913 */ 914 915 /* 916 * URL schemes for capture source. 917 */ 918 /* 919 * This string indicates that the user wants to open a capture from a 920 * local file. 921 */ 922 #define PCAP_SRC_FILE_STRING "file://" 923 /* 924 * This string indicates that the user wants to open a capture from a 925 * network interface. This string does not necessarily involve the use 926 * of the RPCAP protocol. If the interface required resides on the local 927 * host, the RPCAP protocol is not involved and the local functions are used. 928 */ 929 #define PCAP_SRC_IF_STRING "rpcap://" 930 931 /* 932 * Flags to pass to pcap_open(). 933 */ 934 935 /* 936 * Specifies whether promiscuous mode is to be used. 937 */ 938 #define PCAP_OPENFLAG_PROMISCUOUS 0x00000001 939 940 /* 941 * Specifies, for an RPCAP capture, whether the data transfer (in 942 * case of a remote capture) has to be done with UDP protocol. 943 * 944 * If it is '1' if you want a UDP data connection, '0' if you want 945 * a TCP data connection; control connection is always TCP-based. 946 * A UDP connection is much lighter, but it does not guarantee that all 947 * the captured packets arrive to the client workstation. Moreover, 948 * it could be harmful in case of network congestion. 949 * This flag is meaningless if the source is not a remote interface. 950 * In that case, it is simply ignored. 951 */ 952 #define PCAP_OPENFLAG_DATATX_UDP 0x00000002 953 954 /* 955 * Specifies whether the remote probe will capture its own generated 956 * traffic. 957 * 958 * In case the remote probe uses the same interface to capture traffic 959 * and to send data back to the caller, the captured traffic includes 960 * the RPCAP traffic as well. If this flag is turned on, the RPCAP 961 * traffic is excluded from the capture, so that the trace returned 962 * back to the collector is does not include this traffic. 963 * 964 * Has no effect on local interfaces or savefiles. 965 */ 966 #define PCAP_OPENFLAG_NOCAPTURE_RPCAP 0x00000004 967 968 /* 969 * Specifies whether the local adapter will capture its own generated traffic. 970 * 971 * This flag tells the underlying capture driver to drop the packets 972 * that were sent by itself. This is useful when building applications 973 * such as bridges that should ignore the traffic they just sent. 974 * 975 * Supported only on Windows. 976 */ 977 #define PCAP_OPENFLAG_NOCAPTURE_LOCAL 0x00000008 978 979 /* 980 * This flag configures the adapter for maximum responsiveness. 981 * 982 * In presence of a large value for nbytes, WinPcap waits for the arrival 983 * of several packets before copying the data to the user. This guarantees 984 * a low number of system calls, i.e. lower processor usage, i.e. better 985 * performance, which is good for applications like sniffers. If the user 986 * sets the PCAP_OPENFLAG_MAX_RESPONSIVENESS flag, the capture driver will 987 * copy the packets as soon as the application is ready to receive them. 988 * This is suggested for real time applications (such as, for example, 989 * a bridge) that need the best responsiveness. 990 * 991 * The equivalent with pcap_create()/pcap_activate() is "immediate mode". 992 */ 993 #define PCAP_OPENFLAG_MAX_RESPONSIVENESS 0x00000010 994 995 /* 996 * Remote authentication methods. 997 * These are used in the 'type' member of the pcap_rmtauth structure. 998 */ 999 1000 /* 1001 * NULL authentication. 1002 * 1003 * The 'NULL' authentication has to be equal to 'zero', so that old 1004 * applications can just put every field of struct pcap_rmtauth to zero, 1005 * and it does work. 1006 */ 1007 #define RPCAP_RMTAUTH_NULL 0 1008 /* 1009 * Username/password authentication. 1010 * 1011 * With this type of authentication, the RPCAP protocol will use the username/ 1012 * password provided to authenticate the user on the remote machine. If the 1013 * authentication is successful (and the user has the right to open network 1014 * devices) the RPCAP connection will continue; otherwise it will be dropped. 1015 * 1016 * *******NOTE********: the username and password are sent over the network 1017 * to the capture server *IN CLEAR TEXT*. Don't use this on a network 1018 * that you don't completely control! (And be *really* careful in your 1019 * definition of "completely"!) 1020 */ 1021 #define RPCAP_RMTAUTH_PWD 1 1022 1023 /* 1024 * This structure keeps the information needed to authenticate the user 1025 * on a remote machine. 1026 * 1027 * The remote machine can either grant or refuse the access according 1028 * to the information provided. 1029 * In case the NULL authentication is required, both 'username' and 1030 * 'password' can be NULL pointers. 1031 * 1032 * This structure is meaningless if the source is not a remote interface; 1033 * in that case, the functions which requires such a structure can accept 1034 * a NULL pointer as well. 1035 */ 1036 struct pcap_rmtauth 1037 { 1038 /* 1039 * \brief Type of the authentication required. 1040 * 1041 * In order to provide maximum flexibility, we can support different types 1042 * of authentication based on the value of this 'type' variable. The currently 1043 * supported authentication methods are defined into the 1044 * \link remote_auth_methods Remote Authentication Methods Section\endlink. 1045 */ 1046 int type; 1047 /* 1048 * \brief Zero-terminated string containing the username that has to be 1049 * used on the remote machine for authentication. 1050 * 1051 * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication 1052 * and it can be NULL. 1053 */ 1054 char *username; 1055 /* 1056 * \brief Zero-terminated string containing the password that has to be 1057 * used on the remote machine for authentication. 1058 * 1059 * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication 1060 * and it can be NULL. 1061 */ 1062 char *password; 1063 }; 1064 1065 /* 1066 * This routine can open a savefile, a local device, or a device on 1067 * a remote machine running an RPCAP server. 1068 * 1069 * For opening a savefile, the pcap_open_offline routines can be used, 1070 * and will work just as well; code using them will work on more 1071 * platforms than code using pcap_open() to open savefiles. 1072 * 1073 * For opening a local device, pcap_open_live() can be used; it supports 1074 * most of the capabilities that pcap_open() supports, and code using it 1075 * will work on more platforms than code using pcap_open(). pcap_create() 1076 * and pcap_activate() can also be used; they support all capabilities 1077 * that pcap_open() supports, except for the Windows-only 1078 * PCAP_OPENFLAG_NOCAPTURE_LOCAL, and support additional capabilities. 1079 * 1080 * For opening a remote capture, pcap_open() is currently the only 1081 * API available. 1082 */ 1083 PCAP_AVAILABLE_1_9 1084 PCAP_API pcap_t *pcap_open(const char *source, int snaplen, int flags, 1085 int read_timeout, struct pcap_rmtauth *auth, char *errbuf); 1086 1087 PCAP_AVAILABLE_1_9 1088 PCAP_API int pcap_createsrcstr(char *source, int type, const char *host, 1089 const char *port, const char *name, char *errbuf); 1090 1091 PCAP_AVAILABLE_1_9 1092 PCAP_API int pcap_parsesrcstr(const char *source, int *type, char *host, 1093 char *port, char *name, char *errbuf); 1094 1095 /* 1096 * This routine can scan a directory for savefiles, list local capture 1097 * devices, or list capture devices on a remote machine running an RPCAP 1098 * server. 1099 * 1100 * For scanning for savefiles, it can be used on both UN*X systems and 1101 * Windows systems; for each directory entry it sees, it tries to open 1102 * the file as a savefile using pcap_open_offline(), and only includes 1103 * it in the list of files if the open succeeds, so it filters out 1104 * files for which the user doesn't have read permission, as well as 1105 * files that aren't valid savefiles readable by libpcap. 1106 * 1107 * For listing local capture devices, it's just a wrapper around 1108 * pcap_findalldevs(); code using pcap_findalldevs() will work on more 1109 * platforms than code using pcap_findalldevs_ex(). 1110 * 1111 * For listing remote capture devices, pcap_findalldevs_ex() is currently 1112 * the only API available. 1113 */ 1114 PCAP_AVAILABLE_1_9 1115 PCAP_API int pcap_findalldevs_ex(const char *source, 1116 struct pcap_rmtauth *auth, pcap_if_t **alldevs, char *errbuf); 1117 1118 /* 1119 * Sampling methods. 1120 * 1121 * These allow pcap_loop(), pcap_dispatch(), pcap_next(), and pcap_next_ex() 1122 * to see only a sample of packets, rather than all packets. 1123 * 1124 * Currently, they work only on Windows local captures. 1125 */ 1126 1127 /* 1128 * Specifies that no sampling is to be done on the current capture. 1129 * 1130 * In this case, no sampling algorithms are applied to the current capture. 1131 */ 1132 #define PCAP_SAMP_NOSAMP 0 1133 1134 /* 1135 * Specifies that only 1 out of N packets must be returned to the user. 1136 * 1137 * In this case, the 'value' field of the 'pcap_samp' structure indicates the 1138 * number of packets (minus 1) that must be discarded before one packet got 1139 * accepted. 1140 * In other words, if 'value = 10', the first packet is returned to the 1141 * caller, while the following 9 are discarded. 1142 */ 1143 #define PCAP_SAMP_1_EVERY_N 1 1144 1145 /* 1146 * Specifies that we have to return 1 packet every N milliseconds. 1147 * 1148 * In this case, the 'value' field of the 'pcap_samp' structure indicates 1149 * the 'waiting time' in milliseconds before one packet got accepted. 1150 * In other words, if 'value = 10', the first packet is returned to the 1151 * caller; the next returned one will be the first packet that arrives 1152 * when 10ms have elapsed. 1153 */ 1154 #define PCAP_SAMP_FIRST_AFTER_N_MS 2 1155 1156 /* 1157 * This structure defines the information related to sampling. 1158 * 1159 * In case the sampling is requested, the capturing device should read 1160 * only a subset of the packets coming from the source. The returned packets 1161 * depend on the sampling parameters. 1162 * 1163 * WARNING: The sampling process is applied *after* the filtering process. 1164 * In other words, packets are filtered first, then the sampling process 1165 * selects a subset of the 'filtered' packets and it returns them to the 1166 * caller. 1167 */ 1168 struct pcap_samp 1169 { 1170 /* 1171 * Method used for sampling; see above. 1172 */ 1173 int method; 1174 1175 /* 1176 * This value depends on the sampling method defined. 1177 * For its meaning, see above. 1178 */ 1179 int value; 1180 }; 1181 1182 /* 1183 * New functions. 1184 */ 1185 PCAP_AVAILABLE_1_9 1186 PCAP_API struct pcap_samp *pcap_setsampling(pcap_t *p); 1187 1188 /* 1189 * RPCAP active mode. 1190 */ 1191 1192 /* Maximum length of an host name (needed for the RPCAP active mode) */ 1193 #define RPCAP_HOSTLIST_SIZE 1024 1194 1195 PCAP_AVAILABLE_1_9 1196 PCAP_API SOCKET pcap_remoteact_accept(const char *address, const char *port, 1197 const char *hostlist, char *connectinghost, 1198 struct pcap_rmtauth *auth, char *errbuf); 1199 1200 PCAP_AVAILABLE_1_10 1201 PCAP_API SOCKET pcap_remoteact_accept_ex(const char *address, const char *port, 1202 const char *hostlist, char *connectinghost, 1203 struct pcap_rmtauth *auth, int uses_ssl, char *errbuf); 1204 1205 PCAP_AVAILABLE_1_9 1206 PCAP_API int pcap_remoteact_list(char *hostlist, char sep, int size, 1207 char *errbuf); 1208 1209 PCAP_AVAILABLE_1_9 1210 PCAP_API int pcap_remoteact_close(const char *host, char *errbuf); 1211 1212 PCAP_AVAILABLE_1_9 1213 PCAP_API void pcap_remoteact_cleanup(void); 1214 1215 #ifdef __cplusplus 1216 } 1217 #endif 1218 1219 #endif /* lib_pcap_pcap_h */ 1220