1/*
| 1/*
|
2 * Copyright (c) 1999 - 2003 3 * NetGroup, Politecnico di Torino (Italy)
| 2 * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy) 3 * Copyright (c) 2005 - 2007 CACE Technologies, Davis (California)
|
4 * 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 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution.
| 4 * 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 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution.
|
15 * 3. Neither the name of the Politecnico di Torino nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission.
| 15 * 3. Neither the name of the Politecnico di Torino, CACE Technologies 16 * nor the names of its contributors may be used to endorse or promote 17 * products derived from this software without specific prior written 18 * permission.
|
18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33#ifndef lint 34static const char rcsid[] _U_ =
| 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34#ifndef lint 35static const char rcsid[] _U_ =
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35 "@(#) $Header: /tcpdump/master/libpcap/pcap-win32.c,v 1.25.2.3 2005/07/10 17:52:54 risso Exp $ (LBL)";
| 36 "@(#) $Header: /tcpdump/master/libpcap/pcap-win32.c,v 1.25.2.7 2007/06/14 22:07:14 gianluca Exp $ (LBL)";
|
36#endif 37 38#include <pcap-int.h>
| 37#endif 38 39#include <pcap-int.h>
|
39#include <packet32.h>
| 40#include <Packet32.h>
|
40#include <Ntddndis.h> 41#ifdef HAVE_DAG_API 42#include <dagnew.h> 43#include <dagapi.h> 44#endif /* HAVE_DAG_API */ 45#ifdef __MINGW32__ 46int* _errno(); 47#define errno (*_errno()) 48#endif /* __MINGW32__ */ 49 50static int pcap_setfilter_win32_npf(pcap_t *, struct bpf_program *); 51static int pcap_setfilter_win32_dag(pcap_t *, struct bpf_program *); 52static int pcap_getnonblock_win32(pcap_t *, char *); 53static int pcap_setnonblock_win32(pcap_t *, int, char *); 54 55#define PcapBufSize 256000 /*dimension of the buffer in the pcap_t structure*/ 56#define SIZE_BUF 1000000 57 58/* Equivalent to ntohs(), but a lot faster under Windows */ 59#define SWAPS(_X) ((_X & 0xff) << 8) | (_X >> 8) 60 61/* 62 * Header that the WinPcap driver associates to the packets. 63 * Once was in bpf.h 64 */ 65struct bpf_hdr { 66 struct timeval bh_tstamp; /* time stamp */ 67 bpf_u_int32 bh_caplen; /* length of captured portion */ 68 bpf_u_int32 bh_datalen; /* original length of packet */ 69 u_short bh_hdrlen; /* length of bpf header (this struct 70 plus alignment padding) */ 71}; 72 73/* Start winsock */ 74int 75wsockinit() 76{ 77 WORD wVersionRequested; 78 WSADATA wsaData; 79 int err; 80 wVersionRequested = MAKEWORD( 1, 1); 81 err = WSAStartup( wVersionRequested, &wsaData ); 82 if ( err != 0 ) 83 { 84 return -1; 85 } 86 return 0; 87} 88 89 90static int 91pcap_stats_win32(pcap_t *p, struct pcap_stat *ps) 92{ 93 94 if(PacketGetStats(p->adapter, (struct bpf_stat*)ps) != TRUE){ 95 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "PacketGetStats error: %s", pcap_win32strerror()); 96 return -1; 97 } 98 99 return 0; 100} 101 102static int 103pcap_read_win32_npf(pcap_t *p, int cnt, pcap_handler callback, u_char *user) 104{ 105 int cc; 106 int n = 0; 107 register u_char *bp, *ep; 108 109 cc = p->cc; 110 if (p->cc == 0) { 111 /* 112 * Has "pcap_breakloop()" been called? 113 */ 114 if (p->break_loop) { 115 /* 116 * Yes - clear the flag that indicates that it 117 * has, and return -2 to indicate that we were 118 * told to break out of the loop. 119 */ 120 p->break_loop = 0; 121 return (-2); 122 } 123 124 /* capture the packets */ 125 if(PacketReceivePacket(p->adapter,p->Packet,TRUE)==FALSE){ 126 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed"); 127 return (-1); 128 } 129 130 cc = p->Packet->ulBytesReceived; 131 132 bp = p->Packet->Buffer; 133 } 134 else 135 bp = p->bp; 136 137 /* 138 * Loop through each packet. 139 */ 140#define bhp ((struct bpf_hdr *)bp) 141 ep = bp + cc; 142 while (1) { 143 register int caplen, hdrlen; 144 145 /* 146 * Has "pcap_breakloop()" been called? 147 * If so, return immediately - if we haven't read any 148 * packets, clear the flag and return -2 to indicate 149 * that we were told to break out of the loop, otherwise 150 * leave the flag set, so that the *next* call will break 151 * out of the loop without having read any packets, and 152 * return the number of packets we've processed so far. 153 */ 154 if (p->break_loop) { 155 if (n == 0) { 156 p->break_loop = 0; 157 return (-2); 158 } else { 159 p->bp = bp; 160 p->cc = ep - bp; 161 return (n); 162 } 163 } 164 if (bp >= ep) 165 break; 166 167 caplen = bhp->bh_caplen; 168 hdrlen = bhp->bh_hdrlen; 169 170 /* 171 * XXX A bpf_hdr matches a pcap_pkthdr. 172 */ 173 (*callback)(user, (struct pcap_pkthdr*)bp, bp + hdrlen); 174 bp += BPF_WORDALIGN(caplen + hdrlen); 175 if (++n >= cnt && cnt > 0) { 176 p->bp = bp; 177 p->cc = ep - bp; 178 return (n); 179 } 180 } 181#undef bhp 182 p->cc = 0; 183 return (n); 184} 185 186#ifdef HAVE_DAG_API 187static int 188pcap_read_win32_dag(pcap_t *p, int cnt, pcap_handler callback, u_char *user) 189{ 190 u_char *dp = NULL; 191 int packet_len = 0, caplen = 0; 192 struct pcap_pkthdr pcap_header; 193 u_char *endofbuf; 194 int n = 0; 195 dag_record_t *header; 196 unsigned erf_record_len; 197 ULONGLONG ts; 198 int cc; 199 unsigned swt; 200 unsigned dfp = p->adapter->DagFastProcess; 201 202 cc = p->cc; 203 if (cc == 0) /* Get new packets only if we have processed all the ones of the previous read */ 204 { 205 /* Get new packets from the network */ 206 if(PacketReceivePacket(p->adapter, p->Packet, TRUE)==FALSE){ 207 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed"); 208 return (-1); 209 } 210 211 cc = p->Packet->ulBytesReceived; 212 if(cc == 0) 213 /* The timeout has expired but we no packets arrived */ 214 return 0; 215 header = (dag_record_t*)p->adapter->DagBuffer; 216 } 217 else 218 header = (dag_record_t*)p->bp; 219 220 endofbuf = (char*)header + cc; 221 222 /* 223 * Cycle through the packets 224 */ 225 do 226 { 227 erf_record_len = SWAPS(header->rlen); 228 if((char*)header + erf_record_len > endofbuf) 229 break; 230 231 /* Increase the number of captured packets */ 232 p->md.stat.ps_recv++; 233 234 /* Find the beginning of the packet */ 235 dp = ((u_char *)header) + dag_record_size; 236 237 /* Determine actual packet len */ 238 switch(header->type) 239 { 240 case TYPE_ATM: 241 packet_len = ATM_SNAPLEN; 242 caplen = ATM_SNAPLEN; 243 dp += 4; 244 245 break; 246 247 case TYPE_ETH: 248 swt = SWAPS(header->wlen); 249 packet_len = swt - (p->md.dag_fcs_bits); 250 caplen = erf_record_len - dag_record_size - 2; 251 if (caplen > packet_len) 252 { 253 caplen = packet_len; 254 } 255 dp += 2; 256 257 break; 258 259 case TYPE_HDLC_POS: 260 swt = SWAPS(header->wlen); 261 packet_len = swt - (p->md.dag_fcs_bits); 262 caplen = erf_record_len - dag_record_size; 263 if (caplen > packet_len) 264 { 265 caplen = packet_len; 266 } 267 268 break; 269 } 270 271 if(caplen > p->snapshot) 272 caplen = p->snapshot; 273 274 /* 275 * Has "pcap_breakloop()" been called? 276 * If so, return immediately - if we haven't read any 277 * packets, clear the flag and return -2 to indicate 278 * that we were told to break out of the loop, otherwise 279 * leave the flag set, so that the *next* call will break 280 * out of the loop without having read any packets, and 281 * return the number of packets we've processed so far. 282 */ 283 if (p->break_loop) 284 { 285 if (n == 0) 286 { 287 p->break_loop = 0; 288 return (-2); 289 } 290 else 291 { 292 p->bp = (char*)header; 293 p->cc = endofbuf - (char*)header; 294 return (n); 295 } 296 } 297 298 if(!dfp) 299 { 300 /* convert between timestamp formats */ 301 ts = header->ts; 302 pcap_header.ts.tv_sec = (int)(ts >> 32); 303 ts = (ts & 0xffffffffi64) * 1000000; 304 ts += 0x80000000; /* rounding */ 305 pcap_header.ts.tv_usec = (int)(ts >> 32); 306 if (pcap_header.ts.tv_usec >= 1000000) { 307 pcap_header.ts.tv_usec -= 1000000; 308 pcap_header.ts.tv_sec++; 309 } 310 } 311 312 /* No underlaying filtering system. We need to filter on our own */ 313 if (p->fcode.bf_insns) 314 { 315 if (bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen) == 0) 316 { 317 /* Move to next packet */ 318 header = (dag_record_t*)((char*)header + erf_record_len); 319 continue; 320 } 321 } 322 323 /* Fill the header for the user suppplied callback function */ 324 pcap_header.caplen = caplen; 325 pcap_header.len = packet_len; 326 327 /* Call the callback function */ 328 (*callback)(user, &pcap_header, dp); 329 330 /* Move to next packet */ 331 header = (dag_record_t*)((char*)header + erf_record_len); 332 333 /* Stop if the number of packets requested by user has been reached*/ 334 if (++n >= cnt && cnt > 0) 335 { 336 p->bp = (char*)header; 337 p->cc = endofbuf - (char*)header; 338 return (n); 339 } 340 } 341 while((u_char*)header < endofbuf); 342 343 return 1; 344} 345#endif /* HAVE_DAG_API */ 346 347/* Send a packet to the network */ 348static int 349pcap_inject_win32(pcap_t *p, const void *buf, size_t size){ 350 LPPACKET PacketToSend; 351 352 PacketToSend=PacketAllocatePacket(); 353 354 if (PacketToSend == NULL) 355 { 356 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: PacketAllocatePacket failed"); 357 return -1; 358 } 359 360 PacketInitPacket(PacketToSend,(PVOID)buf,size); 361 if(PacketSendPacket(p->adapter,PacketToSend,TRUE) == FALSE){ 362 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: PacketSendPacket failed"); 363 PacketFreePacket(PacketToSend); 364 return -1; 365 } 366 367 PacketFreePacket(PacketToSend); 368 369 /* 370 * We assume it all got sent if "PacketSendPacket()" succeeded. 371 * "pcap_inject()" is expected to return the number of bytes 372 * sent. 373 */ 374 return size; 375} 376 377static void 378pcap_close_win32(pcap_t *p) 379{ 380 pcap_close_common(p); 381 if (p->adapter != NULL) { 382 PacketCloseAdapter(p->adapter); 383 p->adapter = NULL; 384 } 385 if (p->Packet) { 386 PacketFreePacket(p->Packet); 387 p->Packet = NULL; 388 } 389} 390 391pcap_t * 392pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, 393 char *ebuf) 394{ 395 register pcap_t *p; 396 NetType type; 397 398 /* Init WinSock */ 399 wsockinit(); 400 401 p = (pcap_t *)malloc(sizeof(*p)); 402 if (p == NULL) 403 { 404 snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); 405 return (NULL); 406 } 407 memset(p, 0, sizeof(*p)); 408 p->adapter=NULL; 409 410 p->adapter = PacketOpenAdapter((char*)device); 411 412 if (p->adapter == NULL) 413 { 414 free(p); 415 /* Adapter detected but we are not able to open it. Return failure. */ 416 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Error opening adapter: %s", pcap_win32strerror()); 417 return NULL; 418 } 419 420 /*get network type*/ 421 if(PacketGetNetType (p->adapter,&type) == FALSE) 422 { 423 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Cannot determine the network type: %s", pcap_win32strerror()); 424 goto bad; 425 } 426 427 /*Set the linktype*/ 428 switch (type.LinkType) 429 { 430 case NdisMediumWan: 431 p->linktype = DLT_EN10MB; 432 break; 433 434 case NdisMedium802_3: 435 p->linktype = DLT_EN10MB; 436 /* 437 * This is (presumably) a real Ethernet capture; give it a 438 * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so 439 * that an application can let you choose it, in case you're 440 * capturing DOCSIS traffic that a Cisco Cable Modem 441 * Termination System is putting out onto an Ethernet (it 442 * doesn't put an Ethernet header onto the wire, it puts raw 443 * DOCSIS frames out on the wire inside the low-level 444 * Ethernet framing). 445 */ 446 p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2); 447 /* 448 * If that fails, just leave the list empty. 449 */ 450 if (p->dlt_list != NULL) { 451 p->dlt_list[0] = DLT_EN10MB; 452 p->dlt_list[1] = DLT_DOCSIS; 453 p->dlt_count = 2; 454 } 455 break; 456 457 case NdisMediumFddi: 458 p->linktype = DLT_FDDI; 459 break; 460 461 case NdisMedium802_5: 462 p->linktype = DLT_IEEE802; 463 break; 464 465 case NdisMediumArcnetRaw: 466 p->linktype = DLT_ARCNET; 467 break; 468 469 case NdisMediumArcnet878_2: 470 p->linktype = DLT_ARCNET; 471 break; 472 473 case NdisMediumAtm: 474 p->linktype = DLT_ATM_RFC1483; 475 break; 476 477 case NdisMediumCHDLC: 478 p->linktype = DLT_CHDLC; 479 break; 480 481 case NdisMediumPPPSerial: 482 p->linktype = DLT_PPP_SERIAL; 483 break; 484 485 case NdisMediumNull: 486 p->linktype = DLT_NULL; 487 break; 488
| 41#include <Ntddndis.h> 42#ifdef HAVE_DAG_API 43#include <dagnew.h> 44#include <dagapi.h> 45#endif /* HAVE_DAG_API */ 46#ifdef __MINGW32__ 47int* _errno(); 48#define errno (*_errno()) 49#endif /* __MINGW32__ */ 50 51static int pcap_setfilter_win32_npf(pcap_t *, struct bpf_program *); 52static int pcap_setfilter_win32_dag(pcap_t *, struct bpf_program *); 53static int pcap_getnonblock_win32(pcap_t *, char *); 54static int pcap_setnonblock_win32(pcap_t *, int, char *); 55 56#define PcapBufSize 256000 /*dimension of the buffer in the pcap_t structure*/ 57#define SIZE_BUF 1000000 58 59/* Equivalent to ntohs(), but a lot faster under Windows */ 60#define SWAPS(_X) ((_X & 0xff) << 8) | (_X >> 8) 61 62/* 63 * Header that the WinPcap driver associates to the packets. 64 * Once was in bpf.h 65 */ 66struct bpf_hdr { 67 struct timeval bh_tstamp; /* time stamp */ 68 bpf_u_int32 bh_caplen; /* length of captured portion */ 69 bpf_u_int32 bh_datalen; /* original length of packet */ 70 u_short bh_hdrlen; /* length of bpf header (this struct 71 plus alignment padding) */ 72}; 73 74/* Start winsock */ 75int 76wsockinit() 77{ 78 WORD wVersionRequested; 79 WSADATA wsaData; 80 int err; 81 wVersionRequested = MAKEWORD( 1, 1); 82 err = WSAStartup( wVersionRequested, &wsaData ); 83 if ( err != 0 ) 84 { 85 return -1; 86 } 87 return 0; 88} 89 90 91static int 92pcap_stats_win32(pcap_t *p, struct pcap_stat *ps) 93{ 94 95 if(PacketGetStats(p->adapter, (struct bpf_stat*)ps) != TRUE){ 96 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "PacketGetStats error: %s", pcap_win32strerror()); 97 return -1; 98 } 99 100 return 0; 101} 102 103static int 104pcap_read_win32_npf(pcap_t *p, int cnt, pcap_handler callback, u_char *user) 105{ 106 int cc; 107 int n = 0; 108 register u_char *bp, *ep; 109 110 cc = p->cc; 111 if (p->cc == 0) { 112 /* 113 * Has "pcap_breakloop()" been called? 114 */ 115 if (p->break_loop) { 116 /* 117 * Yes - clear the flag that indicates that it 118 * has, and return -2 to indicate that we were 119 * told to break out of the loop. 120 */ 121 p->break_loop = 0; 122 return (-2); 123 } 124 125 /* capture the packets */ 126 if(PacketReceivePacket(p->adapter,p->Packet,TRUE)==FALSE){ 127 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed"); 128 return (-1); 129 } 130 131 cc = p->Packet->ulBytesReceived; 132 133 bp = p->Packet->Buffer; 134 } 135 else 136 bp = p->bp; 137 138 /* 139 * Loop through each packet. 140 */ 141#define bhp ((struct bpf_hdr *)bp) 142 ep = bp + cc; 143 while (1) { 144 register int caplen, hdrlen; 145 146 /* 147 * Has "pcap_breakloop()" been called? 148 * If so, return immediately - if we haven't read any 149 * packets, clear the flag and return -2 to indicate 150 * that we were told to break out of the loop, otherwise 151 * leave the flag set, so that the *next* call will break 152 * out of the loop without having read any packets, and 153 * return the number of packets we've processed so far. 154 */ 155 if (p->break_loop) { 156 if (n == 0) { 157 p->break_loop = 0; 158 return (-2); 159 } else { 160 p->bp = bp; 161 p->cc = ep - bp; 162 return (n); 163 } 164 } 165 if (bp >= ep) 166 break; 167 168 caplen = bhp->bh_caplen; 169 hdrlen = bhp->bh_hdrlen; 170 171 /* 172 * XXX A bpf_hdr matches a pcap_pkthdr. 173 */ 174 (*callback)(user, (struct pcap_pkthdr*)bp, bp + hdrlen); 175 bp += BPF_WORDALIGN(caplen + hdrlen); 176 if (++n >= cnt && cnt > 0) { 177 p->bp = bp; 178 p->cc = ep - bp; 179 return (n); 180 } 181 } 182#undef bhp 183 p->cc = 0; 184 return (n); 185} 186 187#ifdef HAVE_DAG_API 188static int 189pcap_read_win32_dag(pcap_t *p, int cnt, pcap_handler callback, u_char *user) 190{ 191 u_char *dp = NULL; 192 int packet_len = 0, caplen = 0; 193 struct pcap_pkthdr pcap_header; 194 u_char *endofbuf; 195 int n = 0; 196 dag_record_t *header; 197 unsigned erf_record_len; 198 ULONGLONG ts; 199 int cc; 200 unsigned swt; 201 unsigned dfp = p->adapter->DagFastProcess; 202 203 cc = p->cc; 204 if (cc == 0) /* Get new packets only if we have processed all the ones of the previous read */ 205 { 206 /* Get new packets from the network */ 207 if(PacketReceivePacket(p->adapter, p->Packet, TRUE)==FALSE){ 208 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed"); 209 return (-1); 210 } 211 212 cc = p->Packet->ulBytesReceived; 213 if(cc == 0) 214 /* The timeout has expired but we no packets arrived */ 215 return 0; 216 header = (dag_record_t*)p->adapter->DagBuffer; 217 } 218 else 219 header = (dag_record_t*)p->bp; 220 221 endofbuf = (char*)header + cc; 222 223 /* 224 * Cycle through the packets 225 */ 226 do 227 { 228 erf_record_len = SWAPS(header->rlen); 229 if((char*)header + erf_record_len > endofbuf) 230 break; 231 232 /* Increase the number of captured packets */ 233 p->md.stat.ps_recv++; 234 235 /* Find the beginning of the packet */ 236 dp = ((u_char *)header) + dag_record_size; 237 238 /* Determine actual packet len */ 239 switch(header->type) 240 { 241 case TYPE_ATM: 242 packet_len = ATM_SNAPLEN; 243 caplen = ATM_SNAPLEN; 244 dp += 4; 245 246 break; 247 248 case TYPE_ETH: 249 swt = SWAPS(header->wlen); 250 packet_len = swt - (p->md.dag_fcs_bits); 251 caplen = erf_record_len - dag_record_size - 2; 252 if (caplen > packet_len) 253 { 254 caplen = packet_len; 255 } 256 dp += 2; 257 258 break; 259 260 case TYPE_HDLC_POS: 261 swt = SWAPS(header->wlen); 262 packet_len = swt - (p->md.dag_fcs_bits); 263 caplen = erf_record_len - dag_record_size; 264 if (caplen > packet_len) 265 { 266 caplen = packet_len; 267 } 268 269 break; 270 } 271 272 if(caplen > p->snapshot) 273 caplen = p->snapshot; 274 275 /* 276 * Has "pcap_breakloop()" been called? 277 * If so, return immediately - if we haven't read any 278 * packets, clear the flag and return -2 to indicate 279 * that we were told to break out of the loop, otherwise 280 * leave the flag set, so that the *next* call will break 281 * out of the loop without having read any packets, and 282 * return the number of packets we've processed so far. 283 */ 284 if (p->break_loop) 285 { 286 if (n == 0) 287 { 288 p->break_loop = 0; 289 return (-2); 290 } 291 else 292 { 293 p->bp = (char*)header; 294 p->cc = endofbuf - (char*)header; 295 return (n); 296 } 297 } 298 299 if(!dfp) 300 { 301 /* convert between timestamp formats */ 302 ts = header->ts; 303 pcap_header.ts.tv_sec = (int)(ts >> 32); 304 ts = (ts & 0xffffffffi64) * 1000000; 305 ts += 0x80000000; /* rounding */ 306 pcap_header.ts.tv_usec = (int)(ts >> 32); 307 if (pcap_header.ts.tv_usec >= 1000000) { 308 pcap_header.ts.tv_usec -= 1000000; 309 pcap_header.ts.tv_sec++; 310 } 311 } 312 313 /* No underlaying filtering system. We need to filter on our own */ 314 if (p->fcode.bf_insns) 315 { 316 if (bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen) == 0) 317 { 318 /* Move to next packet */ 319 header = (dag_record_t*)((char*)header + erf_record_len); 320 continue; 321 } 322 } 323 324 /* Fill the header for the user suppplied callback function */ 325 pcap_header.caplen = caplen; 326 pcap_header.len = packet_len; 327 328 /* Call the callback function */ 329 (*callback)(user, &pcap_header, dp); 330 331 /* Move to next packet */ 332 header = (dag_record_t*)((char*)header + erf_record_len); 333 334 /* Stop if the number of packets requested by user has been reached*/ 335 if (++n >= cnt && cnt > 0) 336 { 337 p->bp = (char*)header; 338 p->cc = endofbuf - (char*)header; 339 return (n); 340 } 341 } 342 while((u_char*)header < endofbuf); 343 344 return 1; 345} 346#endif /* HAVE_DAG_API */ 347 348/* Send a packet to the network */ 349static int 350pcap_inject_win32(pcap_t *p, const void *buf, size_t size){ 351 LPPACKET PacketToSend; 352 353 PacketToSend=PacketAllocatePacket(); 354 355 if (PacketToSend == NULL) 356 { 357 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: PacketAllocatePacket failed"); 358 return -1; 359 } 360 361 PacketInitPacket(PacketToSend,(PVOID)buf,size); 362 if(PacketSendPacket(p->adapter,PacketToSend,TRUE) == FALSE){ 363 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: PacketSendPacket failed"); 364 PacketFreePacket(PacketToSend); 365 return -1; 366 } 367 368 PacketFreePacket(PacketToSend); 369 370 /* 371 * We assume it all got sent if "PacketSendPacket()" succeeded. 372 * "pcap_inject()" is expected to return the number of bytes 373 * sent. 374 */ 375 return size; 376} 377 378static void 379pcap_close_win32(pcap_t *p) 380{ 381 pcap_close_common(p); 382 if (p->adapter != NULL) { 383 PacketCloseAdapter(p->adapter); 384 p->adapter = NULL; 385 } 386 if (p->Packet) { 387 PacketFreePacket(p->Packet); 388 p->Packet = NULL; 389 } 390} 391 392pcap_t * 393pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, 394 char *ebuf) 395{ 396 register pcap_t *p; 397 NetType type; 398 399 /* Init WinSock */ 400 wsockinit(); 401 402 p = (pcap_t *)malloc(sizeof(*p)); 403 if (p == NULL) 404 { 405 snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); 406 return (NULL); 407 } 408 memset(p, 0, sizeof(*p)); 409 p->adapter=NULL; 410 411 p->adapter = PacketOpenAdapter((char*)device); 412 413 if (p->adapter == NULL) 414 { 415 free(p); 416 /* Adapter detected but we are not able to open it. Return failure. */ 417 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Error opening adapter: %s", pcap_win32strerror()); 418 return NULL; 419 } 420 421 /*get network type*/ 422 if(PacketGetNetType (p->adapter,&type) == FALSE) 423 { 424 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Cannot determine the network type: %s", pcap_win32strerror()); 425 goto bad; 426 } 427 428 /*Set the linktype*/ 429 switch (type.LinkType) 430 { 431 case NdisMediumWan: 432 p->linktype = DLT_EN10MB; 433 break; 434 435 case NdisMedium802_3: 436 p->linktype = DLT_EN10MB; 437 /* 438 * This is (presumably) a real Ethernet capture; give it a 439 * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so 440 * that an application can let you choose it, in case you're 441 * capturing DOCSIS traffic that a Cisco Cable Modem 442 * Termination System is putting out onto an Ethernet (it 443 * doesn't put an Ethernet header onto the wire, it puts raw 444 * DOCSIS frames out on the wire inside the low-level 445 * Ethernet framing). 446 */ 447 p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2); 448 /* 449 * If that fails, just leave the list empty. 450 */ 451 if (p->dlt_list != NULL) { 452 p->dlt_list[0] = DLT_EN10MB; 453 p->dlt_list[1] = DLT_DOCSIS; 454 p->dlt_count = 2; 455 } 456 break; 457 458 case NdisMediumFddi: 459 p->linktype = DLT_FDDI; 460 break; 461 462 case NdisMedium802_5: 463 p->linktype = DLT_IEEE802; 464 break; 465 466 case NdisMediumArcnetRaw: 467 p->linktype = DLT_ARCNET; 468 break; 469 470 case NdisMediumArcnet878_2: 471 p->linktype = DLT_ARCNET; 472 break; 473 474 case NdisMediumAtm: 475 p->linktype = DLT_ATM_RFC1483; 476 break; 477 478 case NdisMediumCHDLC: 479 p->linktype = DLT_CHDLC; 480 break; 481 482 case NdisMediumPPPSerial: 483 p->linktype = DLT_PPP_SERIAL; 484 break; 485 486 case NdisMediumNull: 487 p->linktype = DLT_NULL; 488 break; 489
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| 490 case NdisMediumBare80211: 491 p->linktype = DLT_IEEE802_11; 492 break; 493 494 case NdisMediumRadio80211: 495 p->linktype = DLT_IEEE802_11_RADIO; 496 break; 497 498 case NdisMediumPpi: 499 p->linktype = DLT_PPI; 500 break; 501
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489 default: 490 p->linktype = DLT_EN10MB; /*an unknown adapter is assumed to be ethernet*/ 491 break; 492 } 493
| 502 default: 503 p->linktype = DLT_EN10MB; /*an unknown adapter is assumed to be ethernet*/ 504 break; 505 } 506
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494 /* Set promisquous mode */ 495 if (promisc) PacketSetHwFilter(p->adapter,NDIS_PACKET_TYPE_PROMISCUOUS); 496 else PacketSetHwFilter(p->adapter,NDIS_PACKET_TYPE_ALL_LOCAL);
| 507 /* Set promiscuous mode */ 508 if (promisc) 509 {
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497
| 510
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| 511 if (PacketSetHwFilter(p->adapter,NDIS_PACKET_TYPE_PROMISCUOUS) == FALSE) 512 { 513 snprintf(ebuf, PCAP_ERRBUF_SIZE, "failed to set hardware filter to promiscuous mode"); 514 goto bad; 515 } 516 } 517 else 518 { 519 if (PacketSetHwFilter(p->adapter,NDIS_PACKET_TYPE_ALL_LOCAL) == FALSE) 520 { 521 snprintf(ebuf, PCAP_ERRBUF_SIZE, "failed to set hardware filter to non-promiscuous mode"); 522 goto bad; 523 } 524 } 525
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498 /* Set the buffer size */ 499 p->bufsize = PcapBufSize; 500 501 /* Store the timeout. Used by pcap_setnonblock() */ 502 p->timeout= to_ms; 503 504 /* allocate Packet structure used during the capture */ 505 if((p->Packet = PacketAllocatePacket())==NULL) 506 { 507 snprintf(ebuf, PCAP_ERRBUF_SIZE, "failed to allocate the PACKET structure"); 508 goto bad; 509 } 510 511 if(!(p->adapter->Flags & INFO_FLAG_DAG_CARD)) 512 { 513 /* 514 * Traditional Adapter 515 */ 516 517 p->buffer = (u_char *)malloc(PcapBufSize); 518 if (p->buffer == NULL) 519 { 520 snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); 521 goto bad; 522 } 523 524 PacketInitPacket(p->Packet,(BYTE*)p->buffer,p->bufsize); 525 526 p->snapshot = snaplen; 527 528 /* allocate the standard buffer in the driver */ 529 if(PacketSetBuff( p->adapter, SIZE_BUF)==FALSE) 530 { 531 snprintf(ebuf, PCAP_ERRBUF_SIZE,"driver error: not enough memory to allocate the kernel buffer\n"); 532 goto bad; 533 } 534 535 /* tell the driver to copy the buffer only if it contains at least 16K */ 536 if(PacketSetMinToCopy(p->adapter,16000)==FALSE) 537 { 538 snprintf(ebuf, PCAP_ERRBUF_SIZE,"Error calling PacketSetMinToCopy: %s\n", pcap_win32strerror()); 539 goto bad; 540 } 541 } 542 else 543#ifdef HAVE_DAG_API 544 { 545 /* 546 * Dag Card 547 */ 548 LONG status; 549 HKEY dagkey; 550 DWORD lptype; 551 DWORD lpcbdata; 552 int postype = 0; 553 char keyname[512]; 554 555 snprintf(keyname, sizeof(keyname), "%s\\CardParams\\%s", 556 "SYSTEM\\CurrentControlSet\\Services\\DAG", 557 strstr(_strlwr((char*)device), "dag")); 558 do 559 { 560 status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, keyname, 0, KEY_READ, &dagkey); 561 if(status != ERROR_SUCCESS) 562 break; 563 564 status = RegQueryValueEx(dagkey, 565 "PosType", 566 NULL, 567 &lptype, 568 (char*)&postype, 569 &lpcbdata); 570 571 if(status != ERROR_SUCCESS) 572 { 573 postype = 0; 574 } 575 576 RegCloseKey(dagkey); 577 } 578 while(FALSE); 579 580 581 p->snapshot = PacketSetSnapLen(p->adapter, snaplen); 582 583 /* Set the length of the FCS associated to any packet. This value 584 * will be subtracted to the packet length */ 585 p->md.dag_fcs_bits = p->adapter->DagFcsLen; 586 } 587#else 588 goto bad; 589#endif /* HAVE_DAG_API */ 590 591 PacketSetReadTimeout(p->adapter, to_ms); 592 593#ifdef HAVE_DAG_API 594 if(p->adapter->Flags & INFO_FLAG_DAG_CARD) 595 { 596 /* install dag specific handlers for read and setfilter */ 597 p->read_op = pcap_read_win32_dag; 598 p->setfilter_op = pcap_setfilter_win32_dag; 599 } 600 else 601 { 602#endif /* HAVE_DAG_API */ 603 /* install traditional npf handlers for read and setfilter */ 604 p->read_op = pcap_read_win32_npf; 605 p->setfilter_op = pcap_setfilter_win32_npf; 606#ifdef HAVE_DAG_API 607 } 608#endif /* HAVE_DAG_API */ 609 p->setdirection_op = NULL; /* Not implemented. */ 610 /* XXX - can this be implemented on some versions of Windows? */ 611 p->inject_op = pcap_inject_win32; 612 p->set_datalink_op = NULL; /* can't change data link type */ 613 p->getnonblock_op = pcap_getnonblock_win32; 614 p->setnonblock_op = pcap_setnonblock_win32; 615 p->stats_op = pcap_stats_win32; 616 p->close_op = pcap_close_win32; 617 618 return (p); 619bad: 620 if (p->adapter) 621 PacketCloseAdapter(p->adapter); 622 if (p->buffer != NULL) 623 free(p->buffer); 624 if(p->Packet) 625 PacketFreePacket(p->Packet); 626 /* 627 * Get rid of any link-layer type list we allocated. 628 */ 629 if (p->dlt_list != NULL) 630 free(p->dlt_list); 631 free(p); 632 return (NULL); 633} 634 635 636static int 637pcap_setfilter_win32_npf(pcap_t *p, struct bpf_program *fp) 638{ 639 if(PacketSetBpf(p->adapter,fp)==FALSE){ 640 /* 641 * Kernel filter not installed. 642 * XXX - fall back on userland filtering, as is done 643 * on other platforms? 644 */ 645 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Driver error: cannot set bpf filter: %s", pcap_win32strerror()); 646 return (-1); 647 } 648 649 /* 650 * Discard any previously-received packets, as they might have 651 * passed whatever filter was formerly in effect, but might 652 * not pass this filter (BIOCSETF discards packets buffered 653 * in the kernel, so you can lose packets in any case). 654 */ 655 p->cc = 0; 656 return (0); 657} 658 659/* 660 * We filter at user level, since the kernel driver does't process the packets 661 */ 662static int 663pcap_setfilter_win32_dag(pcap_t *p, struct bpf_program *fp) { 664 665 if(!fp) 666 { 667 strncpy(p->errbuf, "setfilter: No filter specified", sizeof(p->errbuf)); 668 return -1; 669 } 670 671 /* Install a user level filter */ 672 if (install_bpf_program(p, fp) < 0) 673 { 674 snprintf(p->errbuf, sizeof(p->errbuf), 675 "setfilter, unable to install the filter: %s", pcap_strerror(errno)); 676 return -1; 677 } 678 679 p->md.use_bpf = 0; 680 681 return (0); 682} 683 684static int 685pcap_getnonblock_win32(pcap_t *p, char *errbuf) 686{ 687 /* 688 * XXX - if there were a PacketGetReadTimeout() call, we 689 * would use it, and return 1 if the timeout is -1 690 * and 0 otherwise. 691 */ 692 return (p->nonblock); 693} 694 695static int 696pcap_setnonblock_win32(pcap_t *p, int nonblock, char *errbuf) 697{ 698 int newtimeout; 699 700 if (nonblock) { 701 /* 702 * Set the read timeout to -1 for non-blocking mode. 703 */ 704 newtimeout = -1; 705 } else { 706 /* 707 * Restore the timeout set when the device was opened. 708 * (Note that this may be -1, in which case we're not 709 * really leaving non-blocking mode.) 710 */ 711 newtimeout = p->timeout; 712 } 713 if (!PacketSetReadTimeout(p->adapter, newtimeout)) { 714 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, 715 "PacketSetReadTimeout: %s", pcap_win32strerror()); 716 return (-1); 717 } 718 p->nonblock = (newtimeout == -1); 719 return (0); 720} 721 722/* Set the driver working mode */ 723int 724pcap_setmode(pcap_t *p, int mode){ 725 726 if (p->adapter==NULL) 727 { 728 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "impossible to set mode while reading from a file"); 729 return -1; 730 } 731 732 if(PacketSetMode(p->adapter,mode)==FALSE) 733 { 734 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: working mode not recognized"); 735 return -1; 736 } 737 738 return 0; 739} 740 741/* Set the dimension of the kernel-level capture buffer */ 742int 743pcap_setbuff(pcap_t *p, int dim) 744{ 745 if (p->adapter==NULL) 746 { 747 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "The kernel buffer size cannot be set while reading from a file"); 748 return -1; 749 } 750 751 if(PacketSetBuff(p->adapter,dim)==FALSE) 752 { 753 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer"); 754 return -1; 755 } 756 return 0; 757} 758 759/*set the minimum amount of data that will release a read call*/ 760int 761pcap_setmintocopy(pcap_t *p, int size) 762{ 763 if (p->adapter==NULL) 764 { 765 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Impossible to set the mintocopy parameter on an offline capture"); 766 return -1; 767 } 768 769 if(PacketSetMinToCopy(p->adapter, size)==FALSE) 770 { 771 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: unable to set the requested mintocopy size"); 772 return -1; 773 } 774 return 0; 775}
| 526 /* Set the buffer size */ 527 p->bufsize = PcapBufSize; 528 529 /* Store the timeout. Used by pcap_setnonblock() */ 530 p->timeout= to_ms; 531 532 /* allocate Packet structure used during the capture */ 533 if((p->Packet = PacketAllocatePacket())==NULL) 534 { 535 snprintf(ebuf, PCAP_ERRBUF_SIZE, "failed to allocate the PACKET structure"); 536 goto bad; 537 } 538 539 if(!(p->adapter->Flags & INFO_FLAG_DAG_CARD)) 540 { 541 /* 542 * Traditional Adapter 543 */ 544 545 p->buffer = (u_char *)malloc(PcapBufSize); 546 if (p->buffer == NULL) 547 { 548 snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno)); 549 goto bad; 550 } 551 552 PacketInitPacket(p->Packet,(BYTE*)p->buffer,p->bufsize); 553 554 p->snapshot = snaplen; 555 556 /* allocate the standard buffer in the driver */ 557 if(PacketSetBuff( p->adapter, SIZE_BUF)==FALSE) 558 { 559 snprintf(ebuf, PCAP_ERRBUF_SIZE,"driver error: not enough memory to allocate the kernel buffer\n"); 560 goto bad; 561 } 562 563 /* tell the driver to copy the buffer only if it contains at least 16K */ 564 if(PacketSetMinToCopy(p->adapter,16000)==FALSE) 565 { 566 snprintf(ebuf, PCAP_ERRBUF_SIZE,"Error calling PacketSetMinToCopy: %s\n", pcap_win32strerror()); 567 goto bad; 568 } 569 } 570 else 571#ifdef HAVE_DAG_API 572 { 573 /* 574 * Dag Card 575 */ 576 LONG status; 577 HKEY dagkey; 578 DWORD lptype; 579 DWORD lpcbdata; 580 int postype = 0; 581 char keyname[512]; 582 583 snprintf(keyname, sizeof(keyname), "%s\\CardParams\\%s", 584 "SYSTEM\\CurrentControlSet\\Services\\DAG", 585 strstr(_strlwr((char*)device), "dag")); 586 do 587 { 588 status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, keyname, 0, KEY_READ, &dagkey); 589 if(status != ERROR_SUCCESS) 590 break; 591 592 status = RegQueryValueEx(dagkey, 593 "PosType", 594 NULL, 595 &lptype, 596 (char*)&postype, 597 &lpcbdata); 598 599 if(status != ERROR_SUCCESS) 600 { 601 postype = 0; 602 } 603 604 RegCloseKey(dagkey); 605 } 606 while(FALSE); 607 608 609 p->snapshot = PacketSetSnapLen(p->adapter, snaplen); 610 611 /* Set the length of the FCS associated to any packet. This value 612 * will be subtracted to the packet length */ 613 p->md.dag_fcs_bits = p->adapter->DagFcsLen; 614 } 615#else 616 goto bad; 617#endif /* HAVE_DAG_API */ 618 619 PacketSetReadTimeout(p->adapter, to_ms); 620 621#ifdef HAVE_DAG_API 622 if(p->adapter->Flags & INFO_FLAG_DAG_CARD) 623 { 624 /* install dag specific handlers for read and setfilter */ 625 p->read_op = pcap_read_win32_dag; 626 p->setfilter_op = pcap_setfilter_win32_dag; 627 } 628 else 629 { 630#endif /* HAVE_DAG_API */ 631 /* install traditional npf handlers for read and setfilter */ 632 p->read_op = pcap_read_win32_npf; 633 p->setfilter_op = pcap_setfilter_win32_npf; 634#ifdef HAVE_DAG_API 635 } 636#endif /* HAVE_DAG_API */ 637 p->setdirection_op = NULL; /* Not implemented. */ 638 /* XXX - can this be implemented on some versions of Windows? */ 639 p->inject_op = pcap_inject_win32; 640 p->set_datalink_op = NULL; /* can't change data link type */ 641 p->getnonblock_op = pcap_getnonblock_win32; 642 p->setnonblock_op = pcap_setnonblock_win32; 643 p->stats_op = pcap_stats_win32; 644 p->close_op = pcap_close_win32; 645 646 return (p); 647bad: 648 if (p->adapter) 649 PacketCloseAdapter(p->adapter); 650 if (p->buffer != NULL) 651 free(p->buffer); 652 if(p->Packet) 653 PacketFreePacket(p->Packet); 654 /* 655 * Get rid of any link-layer type list we allocated. 656 */ 657 if (p->dlt_list != NULL) 658 free(p->dlt_list); 659 free(p); 660 return (NULL); 661} 662 663 664static int 665pcap_setfilter_win32_npf(pcap_t *p, struct bpf_program *fp) 666{ 667 if(PacketSetBpf(p->adapter,fp)==FALSE){ 668 /* 669 * Kernel filter not installed. 670 * XXX - fall back on userland filtering, as is done 671 * on other platforms? 672 */ 673 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Driver error: cannot set bpf filter: %s", pcap_win32strerror()); 674 return (-1); 675 } 676 677 /* 678 * Discard any previously-received packets, as they might have 679 * passed whatever filter was formerly in effect, but might 680 * not pass this filter (BIOCSETF discards packets buffered 681 * in the kernel, so you can lose packets in any case). 682 */ 683 p->cc = 0; 684 return (0); 685} 686 687/* 688 * We filter at user level, since the kernel driver does't process the packets 689 */ 690static int 691pcap_setfilter_win32_dag(pcap_t *p, struct bpf_program *fp) { 692 693 if(!fp) 694 { 695 strncpy(p->errbuf, "setfilter: No filter specified", sizeof(p->errbuf)); 696 return -1; 697 } 698 699 /* Install a user level filter */ 700 if (install_bpf_program(p, fp) < 0) 701 { 702 snprintf(p->errbuf, sizeof(p->errbuf), 703 "setfilter, unable to install the filter: %s", pcap_strerror(errno)); 704 return -1; 705 } 706 707 p->md.use_bpf = 0; 708 709 return (0); 710} 711 712static int 713pcap_getnonblock_win32(pcap_t *p, char *errbuf) 714{ 715 /* 716 * XXX - if there were a PacketGetReadTimeout() call, we 717 * would use it, and return 1 if the timeout is -1 718 * and 0 otherwise. 719 */ 720 return (p->nonblock); 721} 722 723static int 724pcap_setnonblock_win32(pcap_t *p, int nonblock, char *errbuf) 725{ 726 int newtimeout; 727 728 if (nonblock) { 729 /* 730 * Set the read timeout to -1 for non-blocking mode. 731 */ 732 newtimeout = -1; 733 } else { 734 /* 735 * Restore the timeout set when the device was opened. 736 * (Note that this may be -1, in which case we're not 737 * really leaving non-blocking mode.) 738 */ 739 newtimeout = p->timeout; 740 } 741 if (!PacketSetReadTimeout(p->adapter, newtimeout)) { 742 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, 743 "PacketSetReadTimeout: %s", pcap_win32strerror()); 744 return (-1); 745 } 746 p->nonblock = (newtimeout == -1); 747 return (0); 748} 749 750/* Set the driver working mode */ 751int 752pcap_setmode(pcap_t *p, int mode){ 753 754 if (p->adapter==NULL) 755 { 756 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "impossible to set mode while reading from a file"); 757 return -1; 758 } 759 760 if(PacketSetMode(p->adapter,mode)==FALSE) 761 { 762 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: working mode not recognized"); 763 return -1; 764 } 765 766 return 0; 767} 768 769/* Set the dimension of the kernel-level capture buffer */ 770int 771pcap_setbuff(pcap_t *p, int dim) 772{ 773 if (p->adapter==NULL) 774 { 775 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "The kernel buffer size cannot be set while reading from a file"); 776 return -1; 777 } 778 779 if(PacketSetBuff(p->adapter,dim)==FALSE) 780 { 781 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer"); 782 return -1; 783 } 784 return 0; 785} 786 787/*set the minimum amount of data that will release a read call*/ 788int 789pcap_setmintocopy(pcap_t *p, int size) 790{ 791 if (p->adapter==NULL) 792 { 793 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Impossible to set the mintocopy parameter on an offline capture"); 794 return -1; 795 } 796 797 if(PacketSetMinToCopy(p->adapter, size)==FALSE) 798 { 799 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: unable to set the requested mintocopy size"); 800 return -1; 801 } 802 return 0; 803}
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