1# Original license 2#------------------------------------------------------------------------------- 3# Name: winpcapy.py 4# 5# Author: Massimo Ciani 6# 7# Created: 01/09/2009 8# Copyright: (c) Massimo Ciani 2009 9# 10#------------------------------------------------------------------------------- 11# Modified for scapy's usage 12 13## This file is part of Scapy 14## See http://www.secdev.org/projects/scapy for more informations 15## This program is published under a GPLv2 license 16 17from ctypes import * 18from ctypes.util import find_library 19import sys, os 20from scapy.consts import WINDOWS 21 22HAVE_REMOTE=False 23 24if WINDOWS: 25 HAVE_REMOTE=True 26 SOCKET = c_uint 27 npcap_folder = os.environ["WINDIR"] + "\\System32\\Npcap" 28 if os.path.exists(npcap_folder): 29 # Try to load npcap 30 os.environ['PATH'] = npcap_folder + ";" + os.environ['PATH'] 31 del npcap_folder 32 _lib=CDLL("wpcap.dll") 33else: 34 SOCKET = c_int 35 _lib_name = find_library("pcap") 36 if not _lib_name: 37 raise OSError("Cannot fine libpcap.so library") 38 _lib=CDLL(_lib_name) 39 40 41## 42## misc 43## 44u_short = c_ushort 45bpf_int32 = c_int 46u_int = c_int 47bpf_u_int32 = u_int 48pcap = c_void_p 49pcap_dumper = c_void_p 50u_char = c_ubyte 51FILE = c_void_p 52STRING = c_char_p 53 54class bpf_insn(Structure): 55 _fields_=[("code",c_ushort), 56 ("jt",c_ubyte), 57 ("jf",c_ubyte), 58 ("k",bpf_u_int32)] 59 60class bpf_program(Structure): 61 pass 62bpf_program._fields_ = [('bf_len', u_int), 63 ('bf_insns', POINTER(bpf_insn))] 64 65class bpf_version(Structure): 66 _fields_=[("bv_major",c_ushort), 67 ("bv_minor",c_ushort)] 68 69 70class timeval(Structure): 71 pass 72timeval._fields_ = [('tv_sec', c_long), 73 ('tv_usec', c_long)] 74 75## sockaddr is used by pcap_addr. 76## For example if sa_family==socket.AF_INET then we need cast 77## with sockaddr_in 78if WINDOWS: 79 class sockaddr(Structure): 80 _fields_ = [("sa_family", c_ushort), 81 ("sa_data",c_ubyte * 14)] 82 83 class sockaddr_in(Structure): 84 _fields_ = [("sin_family", c_ushort), 85 ("sin_port", c_uint16), 86 ("sin_addr", 4 * c_ubyte)] 87 88 class sockaddr_in6(Structure): 89 _fields_ = [("sin6_family", c_ushort), 90 ("sin6_port", c_uint16), 91 ("sin6_flowinfo", c_uint32), 92 ("sin6_addr", 16 * c_ubyte), 93 ("sin6_scope", c_uint32)] 94else: 95 class sockaddr(Structure): 96 _fields_ = [("sa_len", c_ubyte), 97 ("sa_family",c_ubyte), 98 ("sa_data",c_ubyte * 14)] 99 100 class sockaddr_in(Structure): 101 _fields_ = [("sin_len", c_ubyte), 102 ("sin_family", c_ubyte), 103 ("sin_port", c_uint16), 104 ("sin_addr", 4 * c_ubyte), 105 ("sin_zero", 8 * c_char)] 106 107 class sockaddr_in6(Structure): 108 _fields_ = [("sin6_len", c_ubyte), 109 ("sin6_family", c_ubyte), 110 ("sin6_port", c_uint16), 111 ("sin6_flowinfo", c_uint32), 112 ("sin6_addr", 16 * c_ubyte), 113 ("sin6_scope", c_uint32)] 114 115 class sockaddr_dl(Structure): 116 _fields_ = [("sdl_len", c_ubyte), 117 ("sdl_family", c_ubyte), 118 ("sdl_index", c_ushort), 119 ("sdl_type", c_ubyte), 120 ("sdl_nlen", c_ubyte), 121 ("sdl_alen", c_ubyte), 122 ("sdl_slen", c_ubyte), 123 ("sdl_data", 46 * c_ubyte)] 124## 125## END misc 126## 127 128## 129## Data Structures 130## 131 132## struct pcap_file_header 133## Header of a libpcap dump file. 134class pcap_file_header(Structure): 135 _fields_ = [('magic', bpf_u_int32), 136 ('version_major', u_short), 137 ('version_minor', u_short), 138 ('thiszone', bpf_int32), 139 ('sigfigs', bpf_u_int32), 140 ('snaplen', bpf_u_int32), 141 ('linktype', bpf_u_int32)] 142 143## struct pcap_pkthdr 144## Header of a packet in the dump file. 145class pcap_pkthdr(Structure): 146 _fields_ = [('ts', timeval), 147 ('caplen', bpf_u_int32), 148 ('len', bpf_u_int32)] 149 150## struct pcap_stat 151## Structure that keeps statistical values on an interface. 152class pcap_stat(Structure): 153 pass 154### _fields_ list in Structure is final. 155### We need a temp list 156_tmpList = [("ps_recv", c_uint), ("ps_drop", c_uint), ("ps_ifdrop", c_uint)] 157if HAVE_REMOTE: 158 _tmpList.append(("ps_capt",c_uint)) 159 _tmpList.append(("ps_sent",c_uint)) 160 _tmpList.append(("ps_netdrop",c_uint)) 161pcap_stat._fields_=_tmpList 162 163## struct pcap_addr 164## Representation of an interface address, used by pcap_findalldevs(). 165class pcap_addr(Structure): 166 pass 167pcap_addr._fields_ = [('next', POINTER(pcap_addr)), 168 ('addr', POINTER(sockaddr)), 169 ('netmask', POINTER(sockaddr)), 170 ('broadaddr', POINTER(sockaddr)), 171 ('dstaddr', POINTER(sockaddr))] 172 173## struct pcap_if 174## Item in a list of interfaces, used by pcap_findalldevs(). 175class pcap_if(Structure): 176 pass 177pcap_if._fields_ = [('next', POINTER(pcap_if)), 178 ('name', STRING), 179 ('description', STRING), 180 ('addresses', POINTER(pcap_addr)), 181 ('flags', bpf_u_int32)] 182 183## 184## END Data Structures 185## 186 187## 188## Defines 189## 190 191##define PCAP_VERSION_MAJOR 2 192# Major libpcap dump file version. 193PCAP_VERSION_MAJOR = 2 194##define PCAP_VERSION_MINOR 4 195# Minor libpcap dump file version. 196PCAP_VERSION_MINOR = 4 197##define PCAP_ERRBUF_SIZE 256 198# Size to use when allocating the buffer that contains the libpcap errors. 199PCAP_ERRBUF_SIZE = 256 200##define PCAP_IF_LOOPBACK 0x00000001 201# interface is loopback 202PCAP_IF_LOOPBACK = 1 203##define MODE_CAPT 0 204# Capture mode, to be used when calling pcap_setmode(). 205MODE_CAPT = 0 206##define MODE_STAT 1 207# Statistical mode, to be used when calling pcap_setmode(). 208MODE_STAT = 1 209 210## 211## END Defines 212## 213 214## 215## Typedefs 216## 217 218#typedef int bpf_int32 (already defined) 219# 32-bit integer 220#typedef u_int bpf_u_int32 (already defined) 221# 32-bit unsigned integer 222#typedef struct pcap pcap_t 223# Descriptor of an open capture instance. This structure is opaque to the user, that handles its content through the functions provided by wpcap.dll. 224pcap_t = pcap 225#typedef struct pcap_dumper pcap_dumper_t 226# libpcap savefile descriptor. 227pcap_dumper_t = pcap_dumper 228#typedef struct pcap_if pcap_if_t 229# Item in a list of interfaces, see pcap_if. 230pcap_if_t = pcap_if 231#typedef struct pcap_addr pcap_addr_t 232# Representation of an interface address, see pcap_addr. 233pcap_addr_t = pcap_addr 234 235## 236## END Typedefs 237## 238 239 240 241 242 243# values for enumeration 'pcap_direction_t' 244#pcap_direction_t = c_int # enum 245 246## 247## Unix-compatible Functions 248## These functions are part of the libpcap library, and therefore work both on Windows and on Linux. 249## 250 251#typedef void(* pcap_handler )(u_char *user, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data) 252# Prototype of the callback function that receives the packets. 253## This one is defined from programmer 254pcap_handler=CFUNCTYPE(None,POINTER(c_ubyte),POINTER(pcap_pkthdr),POINTER(c_ubyte)) 255 256#pcap_t * pcap_open_live (const char *device, int snaplen, int promisc, int to_ms, char *ebuf) 257# Open a live capture from the network. 258pcap_open_live = _lib.pcap_open_live 259pcap_open_live.restype = POINTER(pcap_t) 260pcap_open_live.argtypes = [STRING, c_int, c_int, c_int, STRING] 261 262#pcap_t * pcap_open_dead (int linktype, int snaplen) 263# Create a pcap_t structure without starting a capture. 264pcap_open_dead = _lib.pcap_open_dead 265pcap_open_dead.restype = POINTER(pcap_t) 266pcap_open_dead.argtypes = [c_int, c_int] 267 268#pcap_t * pcap_open_offline (const char *fname, char *errbuf) 269# Open a savefile in the tcpdump/libpcap format to read packets. 270pcap_open_offline = _lib.pcap_open_offline 271pcap_open_offline.restype = POINTER(pcap_t) 272pcap_open_offline.argtypes = [STRING, STRING] 273 274#pcap_dumper_t * pcap_dump_open (pcap_t *p, const char *fname) 275# Open a file to write packets. 276pcap_dump_open = _lib.pcap_dump_open 277pcap_dump_open.restype = POINTER(pcap_dumper_t) 278pcap_dump_open.argtypes = [POINTER(pcap_t), STRING] 279 280#int pcap_setnonblock (pcap_t *p, int nonblock, char *errbuf) 281# Switch between blocking and nonblocking mode. 282pcap_setnonblock = _lib.pcap_setnonblock 283pcap_setnonblock.restype = c_int 284pcap_setnonblock.argtypes = [POINTER(pcap_t), c_int, STRING] 285 286#int pcap_getnonblock (pcap_t *p, char *errbuf) 287# Get the "non-blocking" state of an interface. 288pcap_getnonblock = _lib.pcap_getnonblock 289pcap_getnonblock.restype = c_int 290pcap_getnonblock.argtypes = [POINTER(pcap_t), STRING] 291 292#int pcap_findalldevs (pcap_if_t **alldevsp, char *errbuf) 293# Construct a list of network devices that can be opened with pcap_open_live(). 294pcap_findalldevs = _lib.pcap_findalldevs 295pcap_findalldevs.restype = c_int 296pcap_findalldevs.argtypes = [POINTER(POINTER(pcap_if_t)), STRING] 297 298#void pcap_freealldevs (pcap_if_t *alldevsp) 299# Free an interface list returned by pcap_findalldevs(). 300pcap_freealldevs = _lib.pcap_freealldevs 301pcap_freealldevs.restype = None 302pcap_freealldevs.argtypes = [POINTER(pcap_if_t)] 303 304#char * pcap_lookupdev (char *errbuf) 305# Return the first valid device in the system. 306pcap_lookupdev = _lib.pcap_lookupdev 307pcap_lookupdev.restype = STRING 308pcap_lookupdev.argtypes = [STRING] 309 310#int pcap_lookupnet (const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp, char *errbuf) 311# Return the subnet and netmask of an interface. 312pcap_lookupnet = _lib.pcap_lookupnet 313pcap_lookupnet.restype = c_int 314pcap_lookupnet.argtypes = [STRING, POINTER(bpf_u_int32), POINTER(bpf_u_int32), STRING] 315 316#int pcap_dispatch (pcap_t *p, int cnt, pcap_handler callback, u_char *user) 317# Collect a group of packets. 318pcap_dispatch = _lib.pcap_dispatch 319pcap_dispatch.restype = c_int 320pcap_dispatch.argtypes = [POINTER(pcap_t), c_int, pcap_handler, POINTER(u_char)] 321 322#int pcap_loop (pcap_t *p, int cnt, pcap_handler callback, u_char *user) 323# Collect a group of packets. 324pcap_loop = _lib.pcap_loop 325pcap_loop.restype = c_int 326pcap_loop.argtypes = [POINTER(pcap_t), c_int, pcap_handler, POINTER(u_char)] 327 328#u_char * pcap_next (pcap_t *p, struct pcap_pkthdr *h) 329# Return the next available packet. 330pcap_next = _lib.pcap_next 331pcap_next.restype = POINTER(u_char) 332pcap_next.argtypes = [POINTER(pcap_t), POINTER(pcap_pkthdr)] 333 334#int pcap_next_ex (pcap_t *p, struct pcap_pkthdr **pkt_header, const u_char **pkt_data) 335# Read a packet from an interface or from an offline capture. 336pcap_next_ex = _lib.pcap_next_ex 337pcap_next_ex.restype = c_int 338pcap_next_ex.argtypes = [POINTER(pcap_t), POINTER(POINTER(pcap_pkthdr)), POINTER(POINTER(u_char))] 339 340#void pcap_breakloop (pcap_t *) 341# set a flag that will force pcap_dispatch() or pcap_loop() to return rather than looping. 342pcap_breakloop = _lib.pcap_breakloop 343pcap_breakloop.restype = None 344pcap_breakloop.argtypes = [POINTER(pcap_t)] 345 346#int pcap_sendpacket (pcap_t *p, u_char *buf, int size) 347# Send a raw packet. 348pcap_sendpacket = _lib.pcap_sendpacket 349pcap_sendpacket.restype = c_int 350#pcap_sendpacket.argtypes = [POINTER(pcap_t), POINTER(u_char), c_int] 351pcap_sendpacket.argtypes = [POINTER(pcap_t), c_void_p, c_int] 352 353#void pcap_dump (u_char *user, const struct pcap_pkthdr *h, const u_char *sp) 354# Save a packet to disk. 355pcap_dump = _lib.pcap_dump 356pcap_dump.restype = None 357pcap_dump.argtypes = [POINTER(pcap_dumper_t), POINTER(pcap_pkthdr), POINTER(u_char)] 358 359#long pcap_dump_ftell (pcap_dumper_t *) 360# Return the file position for a "savefile". 361pcap_dump_ftell = _lib.pcap_dump_ftell 362pcap_dump_ftell.restype = c_long 363pcap_dump_ftell.argtypes = [POINTER(pcap_dumper_t)] 364 365#int pcap_compile (pcap_t *p, struct bpf_program *fp, char *str, int optimize, bpf_u_int32 netmask) 366# Compile a packet filter, converting an high level filtering expression (see Filtering expression syntax) in a program that can be interpreted by the kernel-level filtering engine. 367pcap_compile = _lib.pcap_compile 368pcap_compile.restype = c_int 369pcap_compile.argtypes = [POINTER(pcap_t), POINTER(bpf_program), STRING, c_int, bpf_u_int32] 370 371#int pcap_compile_nopcap (int snaplen_arg, int linktype_arg, struct bpf_program *program, char *buf, int optimize, bpf_u_int32 mask) 372# Compile a packet filter without the need of opening an adapter. This function converts an high level filtering expression (see Filtering expression syntax) in a program that can be interpreted by the kernel-level filtering engine. 373pcap_compile_nopcap = _lib.pcap_compile_nopcap 374pcap_compile_nopcap.restype = c_int 375pcap_compile_nopcap.argtypes = [c_int, c_int, POINTER(bpf_program), STRING, c_int, bpf_u_int32] 376 377#int pcap_setfilter (pcap_t *p, struct bpf_program *fp) 378# Associate a filter to a capture. 379pcap_setfilter = _lib.pcap_setfilter 380pcap_setfilter.restype = c_int 381pcap_setfilter.argtypes = [POINTER(pcap_t), POINTER(bpf_program)] 382 383#void pcap_freecode (struct bpf_program *fp) 384# Free a filter. 385pcap_freecode = _lib.pcap_freecode 386pcap_freecode.restype = None 387pcap_freecode.argtypes = [POINTER(bpf_program)] 388 389#int pcap_datalink (pcap_t *p) 390# Return the link layer of an adapter. 391pcap_datalink = _lib.pcap_datalink 392pcap_datalink.restype = c_int 393pcap_datalink.argtypes = [POINTER(pcap_t)] 394 395#int pcap_list_datalinks (pcap_t *p, int **dlt_buf) 396# list datalinks 397pcap_list_datalinks = _lib.pcap_list_datalinks 398pcap_list_datalinks.restype = c_int 399#pcap_list_datalinks.argtypes = [POINTER(pcap_t), POINTER(POINTER(c_int))] 400 401#int pcap_set_datalink (pcap_t *p, int dlt) 402# Set the current data link type of the pcap descriptor to the type specified by dlt. -1 is returned on failure. 403pcap_set_datalink = _lib.pcap_set_datalink 404pcap_set_datalink.restype = c_int 405pcap_set_datalink.argtypes = [POINTER(pcap_t), c_int] 406 407#int pcap_datalink_name_to_val (const char *name) 408# Translates a data link type name, which is a DLT_ name with the DLT_ removed, to the corresponding data link type value. The translation is case-insensitive. -1 is returned on failure. 409pcap_datalink_name_to_val = _lib.pcap_datalink_name_to_val 410pcap_datalink_name_to_val.restype = c_int 411pcap_datalink_name_to_val.argtypes = [STRING] 412 413#const char * pcap_datalink_val_to_name (int dlt) 414# Translates a data link type value to the corresponding data link type name. NULL is returned on failure. 415pcap_datalink_val_to_name = _lib.pcap_datalink_val_to_name 416pcap_datalink_val_to_name.restype = STRING 417pcap_datalink_val_to_name.argtypes = [c_int] 418 419#const char * pcap_datalink_val_to_description (int dlt) 420# Translates a data link type value to a short description of that data link type. NULL is returned on failure. 421pcap_datalink_val_to_description = _lib.pcap_datalink_val_to_description 422pcap_datalink_val_to_description.restype = STRING 423pcap_datalink_val_to_description.argtypes = [c_int] 424 425#int pcap_snapshot (pcap_t *p) 426# Return the dimension of the packet portion (in bytes) that is delivered to the application. 427pcap_snapshot = _lib.pcap_snapshot 428pcap_snapshot.restype = c_int 429pcap_snapshot.argtypes = [POINTER(pcap_t)] 430 431#int pcap_is_swapped (pcap_t *p) 432# returns true if the current savefile uses a different byte order than the current system. 433pcap_is_swapped = _lib.pcap_is_swapped 434pcap_is_swapped.restype = c_int 435pcap_is_swapped.argtypes = [POINTER(pcap_t)] 436 437#int pcap_major_version (pcap_t *p) 438# return the major version number of the pcap library used to write the savefile. 439pcap_major_version = _lib.pcap_major_version 440pcap_major_version.restype = c_int 441pcap_major_version.argtypes = [POINTER(pcap_t)] 442 443#int pcap_minor_version (pcap_t *p) 444# return the minor version number of the pcap library used to write the savefile. 445pcap_minor_version = _lib.pcap_minor_version 446pcap_minor_version.restype = c_int 447pcap_minor_version.argtypes = [POINTER(pcap_t)] 448 449#FILE * pcap_file (pcap_t *p) 450# Return the standard stream of an offline capture. 451pcap_file=_lib.pcap_file 452pcap_file.restype = FILE 453pcap_file.argtypes = [POINTER(pcap_t)] 454 455#int pcap_stats (pcap_t *p, struct pcap_stat *ps) 456# Return statistics on current capture. 457pcap_stats = _lib.pcap_stats 458pcap_stats.restype = c_int 459pcap_stats.argtypes = [POINTER(pcap_t), POINTER(pcap_stat)] 460 461#void pcap_perror (pcap_t *p, char *prefix) 462# print the text of the last pcap library error on stderr, prefixed by prefix. 463pcap_perror = _lib.pcap_perror 464pcap_perror.restype = None 465pcap_perror.argtypes = [POINTER(pcap_t), STRING] 466 467#char * pcap_geterr (pcap_t *p) 468# return the error text pertaining to the last pcap library error. 469pcap_geterr = _lib.pcap_geterr 470pcap_geterr.restype = STRING 471pcap_geterr.argtypes = [POINTER(pcap_t)] 472 473#char * pcap_strerror (int error) 474# Provided in case strerror() isn't available. 475pcap_strerror = _lib.pcap_strerror 476pcap_strerror.restype = STRING 477pcap_strerror.argtypes = [c_int] 478 479#const char * pcap_lib_version (void) 480# Returns a pointer to a string giving information about the version of the libpcap library being used; note that it contains more information than just a version number. 481pcap_lib_version = _lib.pcap_lib_version 482pcap_lib_version.restype = STRING 483pcap_lib_version.argtypes = [] 484 485#void pcap_close (pcap_t *p) 486# close the files associated with p and deallocates resources. 487pcap_close = _lib.pcap_close 488pcap_close.restype = None 489pcap_close.argtypes = [POINTER(pcap_t)] 490 491#FILE * pcap_dump_file (pcap_dumper_t *p) 492# return the standard I/O stream of the 'savefile' opened by pcap_dump_open(). 493pcap_dump_file=_lib.pcap_dump_file 494pcap_dump_file.restype=FILE 495pcap_dump_file.argtypes= [POINTER(pcap_dumper_t)] 496 497#int pcap_dump_flush (pcap_dumper_t *p) 498# Flushes the output buffer to the ``savefile,'' so that any packets written with pcap_dump() but not yet written to the ``savefile'' will be written. -1 is returned on error, 0 on success. 499pcap_dump_flush = _lib.pcap_dump_flush 500pcap_dump_flush.restype = c_int 501pcap_dump_flush.argtypes = [POINTER(pcap_dumper_t)] 502 503#void pcap_dump_close (pcap_dumper_t *p) 504# Closes a savefile. 505pcap_dump_close = _lib.pcap_dump_close 506pcap_dump_close.restype = None 507pcap_dump_close.argtypes = [POINTER(pcap_dumper_t)] 508 509if not WINDOWS: 510 #int pcap_get_selectable_fd(pcap_t, *p) 511 # Returns, on UNIX, a file descriptor number for a file descriptor on which one can do a select(), poll(). -1 is returned if no such descriptor exists. 512 pcap_get_selectable_fd = _lib.pcap_get_selectable_fd 513 pcap_get_selectable_fd.restype = c_int 514 pcap_get_selectable_fd.argtypes = [POINTER(pcap_t)] 515 516########################################### 517## Windows-specific Extensions 518## The functions in this section extend libpcap to offer advanced functionalities 519## (like remote packet capture, packet buffer size variation or high-precision packet injection). 520## Howerver, at the moment they can be used only in Windows. 521########################################### 522if WINDOWS: 523 HANDLE = c_void_p 524 525 ############## 526 ## Identifiers related to the new source syntax 527 ############## 528 #define PCAP_SRC_FILE 2 529 #define PCAP_SRC_IFLOCAL 3 530 #define PCAP_SRC_IFREMOTE 4 531 #Internal representation of the type of source in use (file, remote/local interface). 532 PCAP_SRC_FILE = 2 533 PCAP_SRC_IFLOCAL = 3 534 PCAP_SRC_IFREMOTE = 4 535 536 ############## 537 ## Strings related to the new source syntax 538 ############## 539 #define PCAP_SRC_FILE_STRING "file://" 540 #define PCAP_SRC_IF_STRING "rpcap://" 541 #String that will be used to determine the type of source in use (file, remote/local interface). 542 PCAP_SRC_FILE_STRING="file://" 543 PCAP_SRC_IF_STRING="rpcap://" 544 545 ############## 546 ## Flags defined in the pcap_open() function 547 ############## 548 # define PCAP_OPENFLAG_PROMISCUOUS 1 549 # Defines if the adapter has to go in promiscuous mode. 550 PCAP_OPENFLAG_PROMISCUOUS=1 551 # define PCAP_OPENFLAG_DATATX_UDP 2 552 # Defines if the data transfer (in case of a remote capture) has to be done with UDP protocol. 553 PCAP_OPENFLAG_DATATX_UDP=2 554 # define PCAP_OPENFLAG_NOCAPTURE_RPCAP 4 555 PCAP_OPENFLAG_NOCAPTURE_RPCAP=4 556 # Defines if the remote probe will capture its own generated traffic. 557 # define PCAP_OPENFLAG_NOCAPTURE_LOCAL 8 558 PCAP_OPENFLAG_NOCAPTURE_LOCAL = 8 559 # define PCAP_OPENFLAG_MAX_RESPONSIVENESS 16 560 # This flag configures the adapter for maximum responsiveness. 561 PCAP_OPENFLAG_MAX_RESPONSIVENESS=16 562 563 ############## 564 ## Sampling methods defined in the pcap_setsampling() function 565 ############## 566 # define PCAP_SAMP_NOSAMP 0 567 # No sampling has to be done on the current capture. 568 PCAP_SAMP_NOSAMP=0 569 # define PCAP_SAMP_1_EVERY_N 1 570 # It defines that only 1 out of N packets must be returned to the user. 571 PCAP_SAMP_1_EVERY_N=1 572 #define PCAP_SAMP_FIRST_AFTER_N_MS 2 573 # It defines that we have to return 1 packet every N milliseconds. 574 PCAP_SAMP_FIRST_AFTER_N_MS=2 575 576 ############## 577 ## Authentication methods supported by the RPCAP protocol 578 ############## 579 # define RPCAP_RMTAUTH_NULL 0 580 # It defines the NULL authentication. 581 RPCAP_RMTAUTH_NULL=0 582 # define RPCAP_RMTAUTH_PWD 1 583 # It defines the username/password authentication. 584 RPCAP_RMTAUTH_PWD=1 585 586 587 ############## 588 ## Remote struct and defines 589 ############## 590 # define PCAP_BUF_SIZE 1024 591 # Defines the maximum buffer size in which address, port, interface names are kept. 592 PCAP_BUF_SIZE = 1024 593 # define RPCAP_HOSTLIST_SIZE 1024 594 # Maximum length of an host name (needed for the RPCAP active mode). 595 RPCAP_HOSTLIST_SIZE = 1024 596 597 class pcap_send_queue(Structure): 598 _fields_=[("maxlen",c_uint), 599 ("len",c_uint), 600 ("buffer",c_char_p)] 601 602 ## struct pcap_rmtauth 603 ## This structure keeps the information needed to autheticate the user on a remote machine 604 class pcap_rmtauth(Structure): 605 _fields_=[("type",c_int), 606 ("username",c_char_p), 607 ("password",c_char_p)] 608 609 ## struct pcap_samp 610 ## This structure defines the information related to sampling 611 class pcap_samp(Structure): 612 _fields_=[("method",c_int), 613 ("value",c_int)] 614 615 #PAirpcapHandle pcap_get_airpcap_handle (pcap_t *p) 616 # Returns the AirPcap handler associated with an adapter. This handler can be used to change the wireless-related settings of the CACE Technologies AirPcap wireless capture adapters. 617 618 #bool pcap_offline_filter (struct bpf_program *prog, const struct pcap_pkthdr *header, const u_char *pkt_data) 619 # Returns if a given filter applies to an offline packet. 620 pcap_offline_filter = _lib.pcap_offline_filter 621 pcap_offline_filter.restype = c_bool 622 pcap_offline_filter.argtypes = [POINTER(bpf_program),POINTER(pcap_pkthdr),POINTER(u_char)] 623 624 #int pcap_live_dump (pcap_t *p, char *filename, int maxsize, int maxpacks) 625 # Save a capture to file. 626 pcap_live_dump = _lib.pcap_live_dump 627 pcap_live_dump.restype = c_int 628 pcap_live_dump.argtypes = [POINTER(pcap_t), POINTER(c_char), c_int,c_int] 629 630 #int pcap_live_dump_ended (pcap_t *p, int sync) 631 # Return the status of the kernel dump process, i.e. tells if one of the limits defined with pcap_live_dump() has been reached. 632 pcap_live_dump_ended = _lib.pcap_live_dump_ended 633 pcap_live_dump_ended.restype = c_int 634 pcap_live_dump_ended.argtypes = [POINTER(pcap_t), c_int] 635 636 #struct pcap_stat * pcap_stats_ex (pcap_t *p, int *pcap_stat_size) 637 # Return statistics on current capture. 638 pcap_stats_ex = _lib.pcap_stats_ex 639 pcap_stats_ex.restype = POINTER(pcap_stat) 640 pcap_stats_ex.argtypes = [POINTER(pcap_t), POINTER(c_int)] 641 642 #int pcap_setbuff (pcap_t *p, int dim) 643 # Set the size of the kernel buffer associated with an adapter. 644 pcap_setbuff = _lib.pcap_setbuff 645 pcap_setbuff.restype = c_int 646 pcap_setbuff.argtypes = [POINTER(pcap_t), c_int] 647 648 #int pcap_setmode (pcap_t *p, int mode) 649 # Set the working mode of the interface p to mode. 650 pcap_setmode = _lib.pcap_setmode 651 pcap_setmode.restype = c_int 652 pcap_setmode.argtypes = [POINTER(pcap_t), c_int] 653 654 #int pcap_setmintocopy (pcap_t *p, int size) 655 # Set the minumum amount of data received by the kernel in a single call. 656 pcap_setmintocopy = _lib.pcap_setmintocopy 657 pcap_setmintocopy.restype = c_int 658 pcap_setmintocopy.argtype = [POINTER(pcap_t), c_int] 659 660 #HANDLE pcap_getevent (pcap_t *p) 661 # Return the handle of the event associated with the interface p. 662 pcap_getevent = _lib.pcap_getevent 663 pcap_getevent.restype = HANDLE 664 pcap_getevent.argtypes = [POINTER(pcap_t)] 665 666 #pcap_send_queue * pcap_sendqueue_alloc (u_int memsize) 667 # Allocate a send queue. 668 pcap_sendqueue_alloc = _lib.pcap_sendqueue_alloc 669 pcap_sendqueue_alloc.restype = POINTER(pcap_send_queue) 670 pcap_sendqueue_alloc.argtypes = [c_uint] 671 672 #void pcap_sendqueue_destroy (pcap_send_queue *queue) 673 # Destroy a send queue. 674 pcap_sendqueue_destroy = _lib.pcap_sendqueue_destroy 675 pcap_sendqueue_destroy.restype = None 676 pcap_sendqueue_destroy.argtypes = [POINTER(pcap_send_queue)] 677 678 #int pcap_sendqueue_queue (pcap_send_queue *queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data) 679 # Add a packet to a send queue. 680 pcap_sendqueue_queue = _lib.pcap_sendqueue_queue 681 pcap_sendqueue_queue.restype = c_int 682 pcap_sendqueue_queue.argtypes = [POINTER(pcap_send_queue), POINTER(pcap_pkthdr), POINTER(u_char)] 683 684 #u_int pcap_sendqueue_transmit (pcap_t *p, pcap_send_queue *queue, int sync) 685 # Send a queue of raw packets to the network. 686 pcap_sendqueue_transmit = _lib.pcap_sendqueue_transmit 687 pcap_sendqueue_transmit.retype = u_int 688 pcap_sendqueue_transmit.argtypes = [POINTER(pcap_t), POINTER(pcap_send_queue), c_int] 689 690 #int pcap_findalldevs_ex (char *source, struct pcap_rmtauth *auth, pcap_if_t **alldevs, char *errbuf) 691 # Create a list of network devices that can be opened with pcap_open(). 692 pcap_findalldevs_ex = _lib.pcap_findalldevs_ex 693 pcap_findalldevs_ex.retype = c_int 694 pcap_findalldevs_ex.argtypes = [STRING, POINTER(pcap_rmtauth), POINTER(POINTER(pcap_if_t)), STRING] 695 696 #int pcap_createsrcstr (char *source, int type, const char *host, const char *port, const char *name, char *errbuf) 697 # Accept a set of strings (host name, port, ...), and it returns the complete source string according to the new format (e.g. 'rpcap://1.2.3.4/eth0'). 698 pcap_createsrcstr = _lib.pcap_createsrcstr 699 pcap_createsrcstr.restype = c_int 700 pcap_createsrcstr.argtypes = [STRING, c_int, STRING, STRING, STRING, STRING] 701 702 #int pcap_parsesrcstr (const char *source, int *type, char *host, char *port, char *name, char *errbuf) 703 # Parse the source string and returns the pieces in which the source can be split. 704 pcap_parsesrcstr = _lib.pcap_parsesrcstr 705 pcap_parsesrcstr.retype = c_int 706 pcap_parsesrcstr.argtypes = [STRING, POINTER(c_int), STRING, STRING, STRING, STRING] 707 708 #pcap_t * pcap_open (const char *source, int snaplen, int flags, int read_timeout, struct pcap_rmtauth *auth, char *errbuf) 709 # Open a generic source in order to capture / send (WinPcap only) traffic. 710 pcap_open = _lib.pcap_open 711 pcap_open.restype = POINTER(pcap_t) 712 pcap_open.argtypes = [STRING, c_int, c_int, c_int, POINTER(pcap_rmtauth), STRING] 713 714 #struct pcap_samp * pcap_setsampling (pcap_t *p) 715 # Define a sampling method for packet capture. 716 pcap_setsampling = _lib.pcap_setsampling 717 pcap_setsampling.restype = POINTER(pcap_samp) 718 pcap_setsampling.argtypes = [POINTER(pcap_t)] 719 720 #SOCKET pcap_remoteact_accept (const char *address, const char *port, const char *hostlist, char *connectinghost, struct pcap_rmtauth *auth, char *errbuf) 721 # Block until a network connection is accepted (active mode only). 722 pcap_remoteact_accept = _lib.pcap_remoteact_accept 723 pcap_remoteact_accept.restype = SOCKET 724 pcap_remoteact_accept.argtypes = [STRING, STRING, STRING, STRING, POINTER(pcap_rmtauth), STRING] 725 726 #int pcap_remoteact_close (const char *host, char *errbuf) 727 # Drop an active connection (active mode only). 728 pcap_remoteact_close = _lib.pcap_remoteact_close 729 pcap_remoteact_close.restypes = c_int 730 pcap_remoteact_close.argtypes = [STRING, STRING] 731 732 #void pcap_remoteact_cleanup () 733 # Clean the socket that is currently used in waiting active connections. 734 pcap_remoteact_cleanup = _lib.pcap_remoteact_cleanup 735 pcap_remoteact_cleanup.restypes = None 736 pcap_remoteact_cleanup.argtypes = [] 737 738 #int pcap_remoteact_list (char *hostlist, char sep, int size, char *errbuf) 739 # Return the hostname of the host that have an active connection with us (active mode only). 740 pcap_remoteact_list = _lib.pcap_remoteact_list 741 pcap_remoteact_list.restype = c_int 742 pcap_remoteact_list.argtypes = [STRING, c_char, c_int, STRING] 743