1/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ 2/* 3 * Copyright (c) 1994, 1995, 1996, 1997, 1998 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#ifndef lint 36static const char rcsid[] _U_ =
| 1/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ 2/* 3 * Copyright (c) 1994, 1995, 1996, 1997, 1998 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#ifndef lint 36static const char rcsid[] _U_ =
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37 "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.66.2.1 2005/06/20 21:30:17 guy Exp $ (LBL)";
| 37 "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.66.2.6 2007/06/11 09:52:04 guy Exp $ (LBL)";
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38#endif 39 40#ifdef HAVE_CONFIG_H 41#include "config.h" 42#endif 43 44#ifdef WIN32 45#include <pcap-stdinc.h> 46#else /* WIN32 */ 47 48#include <sys/param.h> 49#ifndef MSDOS 50#include <sys/file.h> 51#endif 52#include <sys/ioctl.h> 53#include <sys/socket.h> 54#ifdef HAVE_SYS_SOCKIO_H 55#include <sys/sockio.h> 56#endif 57 58struct mbuf; /* Squelch compiler warnings on some platforms for */ 59struct rtentry; /* declarations in <net/if.h> */ 60#include <net/if.h> 61#include <netinet/in.h> 62#endif /* WIN32 */ 63 64#include <ctype.h> 65#include <errno.h> 66#include <memory.h> 67#include <stdio.h> 68#include <stdlib.h> 69#include <string.h> 70#if !defined(WIN32) && !defined(__BORLANDC__) 71#include <unistd.h> 72#endif /* !WIN32 && !__BORLANDC__ */ 73#ifdef HAVE_LIMITS_H 74#include <limits.h> 75#else 76#define INT_MAX 2147483647 77#endif 78 79#include "pcap-int.h" 80 81#ifdef HAVE_OS_PROTO_H 82#include "os-proto.h" 83#endif 84 85/* Not all systems have IFF_LOOPBACK */ 86#ifdef IFF_LOOPBACK 87#define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) 88#else 89#define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ 90 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) 91#endif 92 93struct sockaddr * 94dup_sockaddr(struct sockaddr *sa, size_t sa_length) 95{ 96 struct sockaddr *newsa; 97 98 if ((newsa = malloc(sa_length)) == NULL) 99 return (NULL); 100 return (memcpy(newsa, sa, sa_length)); 101} 102 103static int 104get_instance(const char *name) 105{ 106 const char *cp, *endcp; 107 int n; 108 109 if (strcmp(name, "any") == 0) { 110 /* 111 * Give the "any" device an artificially high instance 112 * number, so it shows up after all other non-loopback 113 * interfaces. 114 */ 115 return INT_MAX; 116 } 117 118 endcp = name + strlen(name); 119 for (cp = name; cp < endcp && !isdigit((unsigned char)*cp); ++cp) 120 continue; 121 122 if (isdigit((unsigned char)*cp)) 123 n = atoi(cp); 124 else 125 n = 0; 126 return (n); 127} 128 129int 130add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name, 131 u_int flags, const char *description, char *errbuf) 132{ 133 pcap_t *p; 134 pcap_if_t *curdev, *prevdev, *nextdev; 135 int this_instance; 136 137 /*
| 38#endif 39 40#ifdef HAVE_CONFIG_H 41#include "config.h" 42#endif 43 44#ifdef WIN32 45#include <pcap-stdinc.h> 46#else /* WIN32 */ 47 48#include <sys/param.h> 49#ifndef MSDOS 50#include <sys/file.h> 51#endif 52#include <sys/ioctl.h> 53#include <sys/socket.h> 54#ifdef HAVE_SYS_SOCKIO_H 55#include <sys/sockio.h> 56#endif 57 58struct mbuf; /* Squelch compiler warnings on some platforms for */ 59struct rtentry; /* declarations in <net/if.h> */ 60#include <net/if.h> 61#include <netinet/in.h> 62#endif /* WIN32 */ 63 64#include <ctype.h> 65#include <errno.h> 66#include <memory.h> 67#include <stdio.h> 68#include <stdlib.h> 69#include <string.h> 70#if !defined(WIN32) && !defined(__BORLANDC__) 71#include <unistd.h> 72#endif /* !WIN32 && !__BORLANDC__ */ 73#ifdef HAVE_LIMITS_H 74#include <limits.h> 75#else 76#define INT_MAX 2147483647 77#endif 78 79#include "pcap-int.h" 80 81#ifdef HAVE_OS_PROTO_H 82#include "os-proto.h" 83#endif 84 85/* Not all systems have IFF_LOOPBACK */ 86#ifdef IFF_LOOPBACK 87#define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) 88#else 89#define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ 90 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) 91#endif 92 93struct sockaddr * 94dup_sockaddr(struct sockaddr *sa, size_t sa_length) 95{ 96 struct sockaddr *newsa; 97 98 if ((newsa = malloc(sa_length)) == NULL) 99 return (NULL); 100 return (memcpy(newsa, sa, sa_length)); 101} 102 103static int 104get_instance(const char *name) 105{ 106 const char *cp, *endcp; 107 int n; 108 109 if (strcmp(name, "any") == 0) { 110 /* 111 * Give the "any" device an artificially high instance 112 * number, so it shows up after all other non-loopback 113 * interfaces. 114 */ 115 return INT_MAX; 116 } 117 118 endcp = name + strlen(name); 119 for (cp = name; cp < endcp && !isdigit((unsigned char)*cp); ++cp) 120 continue; 121 122 if (isdigit((unsigned char)*cp)) 123 n = atoi(cp); 124 else 125 n = 0; 126 return (n); 127} 128 129int 130add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name, 131 u_int flags, const char *description, char *errbuf) 132{ 133 pcap_t *p; 134 pcap_if_t *curdev, *prevdev, *nextdev; 135 int this_instance; 136 137 /*
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138 * Can we open this interface for live capture? 139 * 140 * We do this check so that interfaces that ae supplied 141 * by the interface enumeration mechanism we're using 142 * but that don't support packet capture aren't included 143 * in the list. An example of this is loopback interfaces 144 * on Solaris; we don't just omit loopback interfaces 145 * becaue you *can* capture on loopback interfaces on some 146 * OSes. 147 */ 148 p = pcap_open_live(name, 68, 0, 0, errbuf); 149 if (p == NULL) { 150 /* 151 * No. Don't bother including it. 152 * Don't treat this as an error, though. 153 */ 154 *curdev_ret = NULL; 155 return (0); 156 } 157 pcap_close(p); 158 159 /*
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160 * Is there already an entry in the list for this interface? 161 */ 162 for (curdev = *alldevs; curdev != NULL; curdev = curdev->next) { 163 if (strcmp(name, curdev->name) == 0) 164 break; /* yes, we found it */ 165 }
| 138 * Is there already an entry in the list for this interface? 139 */ 140 for (curdev = *alldevs; curdev != NULL; curdev = curdev->next) { 141 if (strcmp(name, curdev->name) == 0) 142 break; /* yes, we found it */ 143 }
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| 144
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166 if (curdev == NULL) { 167 /* 168 * No, we didn't find it.
| 145 if (curdev == NULL) { 146 /* 147 * No, we didn't find it.
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| 148 * 149 * Can we open this interface for live capture? 150 * 151 * We do this check so that interfaces that are 152 * supplied by the interface enumeration mechanism 153 * we're using but that don't support packet capture 154 * aren't included in the list. Loopback interfaces 155 * on Solaris are an example of this; we don't just 156 * omit loopback interfaces on all platforms because 157 * you *can* capture on loopback interfaces on some 158 * OSes. 159 * 160 * On OS X, we don't do this check if the device 161 * name begins with "wlt"; at least some versions 162 * of OS X offer monitor mode capturing by having 163 * a separate "monitor mode" device for each wireless 164 * adapter, rather than by implementing the ioctls 165 * that {Free,Net,Open,DragonFly}BSD provide. 166 * Opening that device puts the adapter into monitor 167 * mode, which, at least for some adapters, causes 168 * them to deassociate from the network with which 169 * they're associated. 170 * 171 * Instead, we try to open the corresponding "en" 172 * device (so that we don't end up with, for users 173 * without sufficient privilege to open capture 174 * devices, a list of adapters that only includes 175 * the wlt devices). 176 */ 177#ifdef __APPLE__ 178 if (strncmp(name, "wlt", 3) == 0) { 179 char *en_name; 180 size_t en_name_len; 181 182 /* 183 * Try to allocate a buffer for the "en" 184 * device's name. 185 */ 186 en_name_len = strlen(name) - 1; 187 en_name = malloc(en_name_len + 1); 188 if (en_name == NULL) { 189 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 190 "malloc: %s", pcap_strerror(errno)); 191 return (-1); 192 } 193 strcpy(en_name, "en"); 194 strcat(en_name, name + 3); 195 p = pcap_open_live(en_name, 68, 0, 0, errbuf); 196 free(en_name); 197 } else 198#endif /* __APPLE */ 199 p = pcap_open_live(name, 68, 0, 0, errbuf); 200 if (p == NULL) { 201 /* 202 * No. Don't bother including it. 203 * Don't treat this as an error, though. 204 */ 205 *curdev_ret = NULL; 206 return (0); 207 } 208 pcap_close(p); 209 210 /* 211 * Yes, we can open it.
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169 * Allocate a new entry. 170 */ 171 curdev = malloc(sizeof(pcap_if_t)); 172 if (curdev == NULL) { 173 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 174 "malloc: %s", pcap_strerror(errno)); 175 return (-1); 176 } 177 178 /* 179 * Fill in the entry. 180 */ 181 curdev->next = NULL;
| 212 * Allocate a new entry. 213 */ 214 curdev = malloc(sizeof(pcap_if_t)); 215 if (curdev == NULL) { 216 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 217 "malloc: %s", pcap_strerror(errno)); 218 return (-1); 219 } 220 221 /* 222 * Fill in the entry. 223 */ 224 curdev->next = NULL;
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182 curdev->name = malloc(strlen(name) + 1); 183 strcpy(curdev->name, name);
| 225 curdev->name = strdup(name); 226 if (curdev->name == NULL) { 227 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 228 "malloc: %s", pcap_strerror(errno)); 229 free(curdev); 230 return (-1); 231 }
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184 if (description != NULL) { 185 /* 186 * We have a description for this interface. 187 */
| 232 if (description != NULL) { 233 /* 234 * We have a description for this interface. 235 */
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188 curdev->description = malloc(strlen(description) + 1); 189 strcpy(curdev->description, description);
| 236 curdev->description = strdup(description); 237 if (curdev->description == NULL) { 238 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 239 "malloc: %s", pcap_strerror(errno)); 240 free(curdev->name); 241 free(curdev); 242 return (-1); 243 }
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190 } else { 191 /* 192 * We don't. 193 */ 194 curdev->description = NULL; 195 } 196 curdev->addresses = NULL; /* list starts out as empty */ 197 curdev->flags = 0; 198 if (ISLOOPBACK(name, flags)) 199 curdev->flags |= PCAP_IF_LOOPBACK; 200 201 /* 202 * Add it to the list, in the appropriate location. 203 * First, get the instance number of this interface. 204 */ 205 this_instance = get_instance(name); 206 207 /* 208 * Now look for the last interface with an instance number 209 * less than or equal to the new interface's instance 210 * number - except that non-loopback interfaces are 211 * arbitrarily treated as having interface numbers less 212 * than those of loopback interfaces, so the loopback 213 * interfaces are put at the end of the list. 214 * 215 * We start with "prevdev" being NULL, meaning we're before 216 * the first element in the list. 217 */ 218 prevdev = NULL; 219 for (;;) { 220 /* 221 * Get the interface after this one. 222 */ 223 if (prevdev == NULL) { 224 /* 225 * The next element is the first element. 226 */ 227 nextdev = *alldevs; 228 } else 229 nextdev = prevdev->next; 230 231 /* 232 * Are we at the end of the list? 233 */ 234 if (nextdev == NULL) { 235 /* 236 * Yes - we have to put the new entry 237 * after "prevdev". 238 */ 239 break; 240 } 241 242 /* 243 * Is the new interface a non-loopback interface 244 * and the next interface a loopback interface? 245 */ 246 if (!(curdev->flags & PCAP_IF_LOOPBACK) && 247 (nextdev->flags & PCAP_IF_LOOPBACK)) { 248 /* 249 * Yes, we should put the new entry 250 * before "nextdev", i.e. after "prevdev". 251 */ 252 break; 253 } 254 255 /* 256 * Is the new interface's instance number less 257 * than the next interface's instance number, 258 * and is it the case that the new interface is a 259 * non-loopback interface or the next interface is 260 * a loopback interface? 261 * 262 * (The goal of both loopback tests is to make 263 * sure that we never put a loopback interface 264 * before any non-loopback interface and that we 265 * always put a non-loopback interface before all 266 * loopback interfaces.) 267 */ 268 if (this_instance < get_instance(nextdev->name) && 269 (!(curdev->flags & PCAP_IF_LOOPBACK) || 270 (nextdev->flags & PCAP_IF_LOOPBACK))) { 271 /* 272 * Yes - we should put the new entry 273 * before "nextdev", i.e. after "prevdev". 274 */ 275 break; 276 } 277 278 prevdev = nextdev; 279 } 280 281 /* 282 * Insert before "nextdev". 283 */ 284 curdev->next = nextdev; 285 286 /* 287 * Insert after "prevdev" - unless "prevdev" is null, 288 * in which case this is the first interface. 289 */ 290 if (prevdev == NULL) { 291 /* 292 * This is the first interface. Pass back a 293 * pointer to it, and put "curdev" before 294 * "nextdev". 295 */ 296 *alldevs = curdev; 297 } else 298 prevdev->next = curdev; 299 } 300 301 *curdev_ret = curdev; 302 return (0); 303} 304 305int 306add_addr_to_iflist(pcap_if_t **alldevs, const char *name, u_int flags, 307 struct sockaddr *addr, size_t addr_size, 308 struct sockaddr *netmask, size_t netmask_size, 309 struct sockaddr *broadaddr, size_t broadaddr_size, 310 struct sockaddr *dstaddr, size_t dstaddr_size, 311 char *errbuf) 312{ 313 pcap_if_t *curdev; 314 pcap_addr_t *curaddr, *prevaddr, *nextaddr; 315 316 if (add_or_find_if(&curdev, alldevs, name, flags, NULL, errbuf) == -1) { 317 /* 318 * Error - give up. 319 */ 320 return (-1); 321 } 322 if (curdev == NULL) { 323 /* 324 * Device wasn't added because it can't be opened. 325 * Not a fatal error. 326 */ 327 return (0); 328 } 329 330 /* 331 * "curdev" is an entry for this interface; add an entry for this 332 * address to its list of addresses. 333 * 334 * Allocate the new entry and fill it in. 335 */ 336 curaddr = malloc(sizeof(pcap_addr_t)); 337 if (curaddr == NULL) { 338 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 339 "malloc: %s", pcap_strerror(errno)); 340 return (-1); 341 } 342 343 curaddr->next = NULL; 344 if (addr != NULL) { 345 curaddr->addr = dup_sockaddr(addr, addr_size); 346 if (curaddr->addr == NULL) { 347 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 348 "malloc: %s", pcap_strerror(errno)); 349 free(curaddr); 350 return (-1); 351 } 352 } else 353 curaddr->addr = NULL; 354 355 if (netmask != NULL) { 356 curaddr->netmask = dup_sockaddr(netmask, netmask_size); 357 if (curaddr->netmask == NULL) { 358 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 359 "malloc: %s", pcap_strerror(errno));
| 244 } else { 245 /* 246 * We don't. 247 */ 248 curdev->description = NULL; 249 } 250 curdev->addresses = NULL; /* list starts out as empty */ 251 curdev->flags = 0; 252 if (ISLOOPBACK(name, flags)) 253 curdev->flags |= PCAP_IF_LOOPBACK; 254 255 /* 256 * Add it to the list, in the appropriate location. 257 * First, get the instance number of this interface. 258 */ 259 this_instance = get_instance(name); 260 261 /* 262 * Now look for the last interface with an instance number 263 * less than or equal to the new interface's instance 264 * number - except that non-loopback interfaces are 265 * arbitrarily treated as having interface numbers less 266 * than those of loopback interfaces, so the loopback 267 * interfaces are put at the end of the list. 268 * 269 * We start with "prevdev" being NULL, meaning we're before 270 * the first element in the list. 271 */ 272 prevdev = NULL; 273 for (;;) { 274 /* 275 * Get the interface after this one. 276 */ 277 if (prevdev == NULL) { 278 /* 279 * The next element is the first element. 280 */ 281 nextdev = *alldevs; 282 } else 283 nextdev = prevdev->next; 284 285 /* 286 * Are we at the end of the list? 287 */ 288 if (nextdev == NULL) { 289 /* 290 * Yes - we have to put the new entry 291 * after "prevdev". 292 */ 293 break; 294 } 295 296 /* 297 * Is the new interface a non-loopback interface 298 * and the next interface a loopback interface? 299 */ 300 if (!(curdev->flags & PCAP_IF_LOOPBACK) && 301 (nextdev->flags & PCAP_IF_LOOPBACK)) { 302 /* 303 * Yes, we should put the new entry 304 * before "nextdev", i.e. after "prevdev". 305 */ 306 break; 307 } 308 309 /* 310 * Is the new interface's instance number less 311 * than the next interface's instance number, 312 * and is it the case that the new interface is a 313 * non-loopback interface or the next interface is 314 * a loopback interface? 315 * 316 * (The goal of both loopback tests is to make 317 * sure that we never put a loopback interface 318 * before any non-loopback interface and that we 319 * always put a non-loopback interface before all 320 * loopback interfaces.) 321 */ 322 if (this_instance < get_instance(nextdev->name) && 323 (!(curdev->flags & PCAP_IF_LOOPBACK) || 324 (nextdev->flags & PCAP_IF_LOOPBACK))) { 325 /* 326 * Yes - we should put the new entry 327 * before "nextdev", i.e. after "prevdev". 328 */ 329 break; 330 } 331 332 prevdev = nextdev; 333 } 334 335 /* 336 * Insert before "nextdev". 337 */ 338 curdev->next = nextdev; 339 340 /* 341 * Insert after "prevdev" - unless "prevdev" is null, 342 * in which case this is the first interface. 343 */ 344 if (prevdev == NULL) { 345 /* 346 * This is the first interface. Pass back a 347 * pointer to it, and put "curdev" before 348 * "nextdev". 349 */ 350 *alldevs = curdev; 351 } else 352 prevdev->next = curdev; 353 } 354 355 *curdev_ret = curdev; 356 return (0); 357} 358 359int 360add_addr_to_iflist(pcap_if_t **alldevs, const char *name, u_int flags, 361 struct sockaddr *addr, size_t addr_size, 362 struct sockaddr *netmask, size_t netmask_size, 363 struct sockaddr *broadaddr, size_t broadaddr_size, 364 struct sockaddr *dstaddr, size_t dstaddr_size, 365 char *errbuf) 366{ 367 pcap_if_t *curdev; 368 pcap_addr_t *curaddr, *prevaddr, *nextaddr; 369 370 if (add_or_find_if(&curdev, alldevs, name, flags, NULL, errbuf) == -1) { 371 /* 372 * Error - give up. 373 */ 374 return (-1); 375 } 376 if (curdev == NULL) { 377 /* 378 * Device wasn't added because it can't be opened. 379 * Not a fatal error. 380 */ 381 return (0); 382 } 383 384 /* 385 * "curdev" is an entry for this interface; add an entry for this 386 * address to its list of addresses. 387 * 388 * Allocate the new entry and fill it in. 389 */ 390 curaddr = malloc(sizeof(pcap_addr_t)); 391 if (curaddr == NULL) { 392 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 393 "malloc: %s", pcap_strerror(errno)); 394 return (-1); 395 } 396 397 curaddr->next = NULL; 398 if (addr != NULL) { 399 curaddr->addr = dup_sockaddr(addr, addr_size); 400 if (curaddr->addr == NULL) { 401 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 402 "malloc: %s", pcap_strerror(errno)); 403 free(curaddr); 404 return (-1); 405 } 406 } else 407 curaddr->addr = NULL; 408 409 if (netmask != NULL) { 410 curaddr->netmask = dup_sockaddr(netmask, netmask_size); 411 if (curaddr->netmask == NULL) { 412 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 413 "malloc: %s", pcap_strerror(errno));
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| 414 if (curaddr->addr != NULL) 415 free(curaddr->addr);
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360 free(curaddr); 361 return (-1); 362 } 363 } else 364 curaddr->netmask = NULL; 365 366 if (broadaddr != NULL) { 367 curaddr->broadaddr = dup_sockaddr(broadaddr, broadaddr_size); 368 if (curaddr->broadaddr == NULL) { 369 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 370 "malloc: %s", pcap_strerror(errno));
| 416 free(curaddr); 417 return (-1); 418 } 419 } else 420 curaddr->netmask = NULL; 421 422 if (broadaddr != NULL) { 423 curaddr->broadaddr = dup_sockaddr(broadaddr, broadaddr_size); 424 if (curaddr->broadaddr == NULL) { 425 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 426 "malloc: %s", pcap_strerror(errno));
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| 427 if (curaddr->netmask != NULL) 428 free(curaddr->netmask); 429 if (curaddr->addr != NULL) 430 free(curaddr->addr);
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371 free(curaddr); 372 return (-1); 373 } 374 } else 375 curaddr->broadaddr = NULL; 376 377 if (dstaddr != NULL) { 378 curaddr->dstaddr = dup_sockaddr(dstaddr, dstaddr_size); 379 if (curaddr->dstaddr == NULL) { 380 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 381 "malloc: %s", pcap_strerror(errno));
| 431 free(curaddr); 432 return (-1); 433 } 434 } else 435 curaddr->broadaddr = NULL; 436 437 if (dstaddr != NULL) { 438 curaddr->dstaddr = dup_sockaddr(dstaddr, dstaddr_size); 439 if (curaddr->dstaddr == NULL) { 440 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 441 "malloc: %s", pcap_strerror(errno));
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| 442 if (curaddr->broadaddr != NULL) 443 free(curaddr->broadaddr); 444 if (curaddr->netmask != NULL) 445 free(curaddr->netmask); 446 if (curaddr->addr != NULL) 447 free(curaddr->addr);
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382 free(curaddr); 383 return (-1); 384 } 385 } else 386 curaddr->dstaddr = NULL; 387 388 /* 389 * Find the end of the list of addresses. 390 */ 391 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) { 392 nextaddr = prevaddr->next; 393 if (nextaddr == NULL) { 394 /* 395 * This is the end of the list. 396 */ 397 break; 398 } 399 } 400 401 if (prevaddr == NULL) { 402 /* 403 * The list was empty; this is the first member. 404 */ 405 curdev->addresses = curaddr; 406 } else { 407 /* 408 * "prevaddr" is the last member of the list; append 409 * this member to it. 410 */ 411 prevaddr->next = curaddr; 412 } 413 414 return (0); 415} 416 417int 418pcap_add_if(pcap_if_t **devlist, const char *name, u_int flags, 419 const char *description, char *errbuf) 420{ 421 pcap_if_t *curdev; 422 423 return (add_or_find_if(&curdev, devlist, name, flags, description, 424 errbuf)); 425} 426 427 428/* 429 * Free a list of interfaces. 430 */ 431void 432pcap_freealldevs(pcap_if_t *alldevs) 433{ 434 pcap_if_t *curdev, *nextdev; 435 pcap_addr_t *curaddr, *nextaddr; 436 437 for (curdev = alldevs; curdev != NULL; curdev = nextdev) { 438 nextdev = curdev->next; 439 440 /* 441 * Free all addresses. 442 */ 443 for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) { 444 nextaddr = curaddr->next; 445 if (curaddr->addr) 446 free(curaddr->addr); 447 if (curaddr->netmask) 448 free(curaddr->netmask); 449 if (curaddr->broadaddr) 450 free(curaddr->broadaddr); 451 if (curaddr->dstaddr) 452 free(curaddr->dstaddr); 453 free(curaddr); 454 } 455 456 /* 457 * Free the name string. 458 */ 459 free(curdev->name); 460 461 /* 462 * Free the description string, if any. 463 */ 464 if (curdev->description != NULL) 465 free(curdev->description); 466 467 /* 468 * Free the interface. 469 */ 470 free(curdev); 471 } 472} 473 474#if !defined(WIN32) && !defined(MSDOS) 475 476/* 477 * Return the name of a network interface attached to the system, or NULL 478 * if none can be found. The interface must be configured up; the 479 * lowest unit number is preferred; loopback is ignored. 480 */ 481char * 482pcap_lookupdev(errbuf) 483 register char *errbuf; 484{ 485 pcap_if_t *alldevs; 486/* for old BSD systems, including bsdi3 */ 487#ifndef IF_NAMESIZE 488#define IF_NAMESIZE IFNAMSIZ 489#endif 490 static char device[IF_NAMESIZE + 1]; 491 char *ret; 492 493 if (pcap_findalldevs(&alldevs, errbuf) == -1) 494 return (NULL); 495 496 if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) { 497 /* 498 * There are no devices on the list, or the first device 499 * on the list is a loopback device, which means there 500 * are no non-loopback devices on the list. This means 501 * we can't return any device. 502 * 503 * XXX - why not return a loopback device? If we can't 504 * capture on it, it won't be on the list, and if it's 505 * on the list, there aren't any non-loopback devices, 506 * so why not just supply it as the default device? 507 */ 508 (void)strlcpy(errbuf, "no suitable device found", 509 PCAP_ERRBUF_SIZE); 510 ret = NULL; 511 } else { 512 /* 513 * Return the name of the first device on the list. 514 */ 515 (void)strlcpy(device, alldevs->name, sizeof(device)); 516 ret = device; 517 } 518 519 pcap_freealldevs(alldevs); 520 return (ret); 521} 522 523int 524pcap_lookupnet(device, netp, maskp, errbuf) 525 register const char *device; 526 register bpf_u_int32 *netp, *maskp; 527 register char *errbuf; 528{ 529 register int fd;
| 448 free(curaddr); 449 return (-1); 450 } 451 } else 452 curaddr->dstaddr = NULL; 453 454 /* 455 * Find the end of the list of addresses. 456 */ 457 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) { 458 nextaddr = prevaddr->next; 459 if (nextaddr == NULL) { 460 /* 461 * This is the end of the list. 462 */ 463 break; 464 } 465 } 466 467 if (prevaddr == NULL) { 468 /* 469 * The list was empty; this is the first member. 470 */ 471 curdev->addresses = curaddr; 472 } else { 473 /* 474 * "prevaddr" is the last member of the list; append 475 * this member to it. 476 */ 477 prevaddr->next = curaddr; 478 } 479 480 return (0); 481} 482 483int 484pcap_add_if(pcap_if_t **devlist, const char *name, u_int flags, 485 const char *description, char *errbuf) 486{ 487 pcap_if_t *curdev; 488 489 return (add_or_find_if(&curdev, devlist, name, flags, description, 490 errbuf)); 491} 492 493 494/* 495 * Free a list of interfaces. 496 */ 497void 498pcap_freealldevs(pcap_if_t *alldevs) 499{ 500 pcap_if_t *curdev, *nextdev; 501 pcap_addr_t *curaddr, *nextaddr; 502 503 for (curdev = alldevs; curdev != NULL; curdev = nextdev) { 504 nextdev = curdev->next; 505 506 /* 507 * Free all addresses. 508 */ 509 for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) { 510 nextaddr = curaddr->next; 511 if (curaddr->addr) 512 free(curaddr->addr); 513 if (curaddr->netmask) 514 free(curaddr->netmask); 515 if (curaddr->broadaddr) 516 free(curaddr->broadaddr); 517 if (curaddr->dstaddr) 518 free(curaddr->dstaddr); 519 free(curaddr); 520 } 521 522 /* 523 * Free the name string. 524 */ 525 free(curdev->name); 526 527 /* 528 * Free the description string, if any. 529 */ 530 if (curdev->description != NULL) 531 free(curdev->description); 532 533 /* 534 * Free the interface. 535 */ 536 free(curdev); 537 } 538} 539 540#if !defined(WIN32) && !defined(MSDOS) 541 542/* 543 * Return the name of a network interface attached to the system, or NULL 544 * if none can be found. The interface must be configured up; the 545 * lowest unit number is preferred; loopback is ignored. 546 */ 547char * 548pcap_lookupdev(errbuf) 549 register char *errbuf; 550{ 551 pcap_if_t *alldevs; 552/* for old BSD systems, including bsdi3 */ 553#ifndef IF_NAMESIZE 554#define IF_NAMESIZE IFNAMSIZ 555#endif 556 static char device[IF_NAMESIZE + 1]; 557 char *ret; 558 559 if (pcap_findalldevs(&alldevs, errbuf) == -1) 560 return (NULL); 561 562 if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) { 563 /* 564 * There are no devices on the list, or the first device 565 * on the list is a loopback device, which means there 566 * are no non-loopback devices on the list. This means 567 * we can't return any device. 568 * 569 * XXX - why not return a loopback device? If we can't 570 * capture on it, it won't be on the list, and if it's 571 * on the list, there aren't any non-loopback devices, 572 * so why not just supply it as the default device? 573 */ 574 (void)strlcpy(errbuf, "no suitable device found", 575 PCAP_ERRBUF_SIZE); 576 ret = NULL; 577 } else { 578 /* 579 * Return the name of the first device on the list. 580 */ 581 (void)strlcpy(device, alldevs->name, sizeof(device)); 582 ret = device; 583 } 584 585 pcap_freealldevs(alldevs); 586 return (ret); 587} 588 589int 590pcap_lookupnet(device, netp, maskp, errbuf) 591 register const char *device; 592 register bpf_u_int32 *netp, *maskp; 593 register char *errbuf; 594{ 595 register int fd;
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530 register struct sockaddr_in *sin;
| 596 register struct sockaddr_in *sin4;
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531 struct ifreq ifr; 532 533 /* 534 * The pseudo-device "any" listens on all interfaces and therefore 535 * has the network address and -mask "0.0.0.0" therefore catching 536 * all traffic. Using NULL for the interface is the same as "any". 537 */ 538 if (!device || strcmp(device, "any") == 0 539#ifdef HAVE_DAG_API 540 || strstr(device, "dag") != NULL 541#endif 542#ifdef HAVE_SEPTEL_API 543 || strstr(device, "septel") != NULL 544#endif 545 ) { 546 *netp = *maskp = 0; 547 return 0; 548 } 549 550 fd = socket(AF_INET, SOCK_DGRAM, 0); 551 if (fd < 0) { 552 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s", 553 pcap_strerror(errno)); 554 return (-1); 555 } 556 memset(&ifr, 0, sizeof(ifr)); 557#ifdef linux 558 /* XXX Work around Linux kernel bug */ 559 ifr.ifr_addr.sa_family = AF_INET; 560#endif 561 (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name)); 562 if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) { 563 if (errno == EADDRNOTAVAIL) { 564 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 565 "%s: no IPv4 address assigned", device); 566 } else { 567 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 568 "SIOCGIFADDR: %s: %s", 569 device, pcap_strerror(errno)); 570 } 571 (void)close(fd); 572 return (-1); 573 }
| 597 struct ifreq ifr; 598 599 /* 600 * The pseudo-device "any" listens on all interfaces and therefore 601 * has the network address and -mask "0.0.0.0" therefore catching 602 * all traffic. Using NULL for the interface is the same as "any". 603 */ 604 if (!device || strcmp(device, "any") == 0 605#ifdef HAVE_DAG_API 606 || strstr(device, "dag") != NULL 607#endif 608#ifdef HAVE_SEPTEL_API 609 || strstr(device, "septel") != NULL 610#endif 611 ) { 612 *netp = *maskp = 0; 613 return 0; 614 } 615 616 fd = socket(AF_INET, SOCK_DGRAM, 0); 617 if (fd < 0) { 618 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s", 619 pcap_strerror(errno)); 620 return (-1); 621 } 622 memset(&ifr, 0, sizeof(ifr)); 623#ifdef linux 624 /* XXX Work around Linux kernel bug */ 625 ifr.ifr_addr.sa_family = AF_INET; 626#endif 627 (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name)); 628 if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) { 629 if (errno == EADDRNOTAVAIL) { 630 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 631 "%s: no IPv4 address assigned", device); 632 } else { 633 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 634 "SIOCGIFADDR: %s: %s", 635 device, pcap_strerror(errno)); 636 } 637 (void)close(fd); 638 return (-1); 639 }
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574 sin = (struct sockaddr_in *)&ifr.ifr_addr; 575 *netp = sin->sin_addr.s_addr;
| 640 sin4 = (struct sockaddr_in *)&ifr.ifr_addr; 641 *netp = sin4->sin_addr.s_addr;
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576 if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) { 577 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 578 "SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno)); 579 (void)close(fd); 580 return (-1); 581 } 582 (void)close(fd);
| 642 if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) { 643 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 644 "SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno)); 645 (void)close(fd); 646 return (-1); 647 } 648 (void)close(fd);
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583 *maskp = sin->sin_addr.s_addr;
| 649 *maskp = sin4->sin_addr.s_addr;
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584 if (*maskp == 0) { 585 if (IN_CLASSA(*netp)) 586 *maskp = IN_CLASSA_NET; 587 else if (IN_CLASSB(*netp)) 588 *maskp = IN_CLASSB_NET; 589 else if (IN_CLASSC(*netp)) 590 *maskp = IN_CLASSC_NET; 591 else { 592 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 593 "inet class for 0x%x unknown", *netp); 594 return (-1); 595 } 596 } 597 *netp &= *maskp; 598 return (0); 599} 600 601#elif defined(WIN32) 602 603/* 604 * Return the name of a network interface attached to the system, or NULL 605 * if none can be found. The interface must be configured up; the 606 * lowest unit number is preferred; loopback is ignored. 607 */ 608char * 609pcap_lookupdev(errbuf) 610 register char *errbuf; 611{ 612 DWORD dwVersion; 613 DWORD dwWindowsMajorVersion; 614 dwVersion = GetVersion(); /* get the OS version */ 615 dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion))); 616 617 if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) { 618 /* 619 * Windows 95, 98, ME. 620 */ 621 ULONG NameLength = 8192; 622 static char AdaptersName[8192]; 623 624 if (PacketGetAdapterNames(AdaptersName,&NameLength) ) 625 return (AdaptersName); 626 else 627 return NULL; 628 } else { 629 /* 630 * Windows NT (NT 4.0, W2K, WXP). Convert the names to UNICODE for backward compatibility 631 */ 632 ULONG NameLength = 8192; 633 static WCHAR AdaptersName[8192]; 634 char *tAstr; 635 WCHAR *tUstr; 636 WCHAR *TAdaptersName = (WCHAR*)malloc(8192 * sizeof(WCHAR)); 637 int NAdapts = 0; 638 639 if(TAdaptersName == NULL) 640 { 641 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure"); 642 return NULL; 643 } 644 645 if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) ) 646 { 647 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 648 "PacketGetAdapterNames: %s", 649 pcap_win32strerror()); 650 free(TAdaptersName); 651 return NULL; 652 } 653 654 655 tAstr = (char*)TAdaptersName; 656 tUstr = (WCHAR*)AdaptersName; 657 658 /* 659 * Convert and copy the device names 660 */ 661 while(sscanf(tAstr, "%S", tUstr) > 0) 662 { 663 tAstr += strlen(tAstr) + 1; 664 tUstr += wcslen(tUstr) + 1; 665 NAdapts ++; 666 } 667 668 tAstr++; 669 *tUstr = 0; 670 tUstr++; 671 672 /* 673 * Copy the descriptions 674 */ 675 while(NAdapts--) 676 { 677 strcpy((char*)tUstr, tAstr); 678 (char*)tUstr += strlen(tAstr) + 1;; 679 tAstr += strlen(tAstr) + 1; 680 } 681 682 free(TAdaptersName); 683 return (char *)(AdaptersName); 684 } 685} 686 687 688int 689pcap_lookupnet(device, netp, maskp, errbuf) 690 register const char *device; 691 register bpf_u_int32 *netp, *maskp; 692 register char *errbuf; 693{ 694 /* 695 * We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo() 696 * in order to skip non IPv4 (i.e. IPv6 addresses) 697 */ 698 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES]; 699 LONG if_addr_size = 1; 700 struct sockaddr_in *t_addr; 701 unsigned int i; 702 703 if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) { 704 *netp = *maskp = 0; 705 return (0); 706 } 707 708 for(i=0; i<MAX_NETWORK_ADDRESSES; i++) 709 { 710 if(if_addrs[i].IPAddress.ss_family == AF_INET) 711 { 712 t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress); 713 *netp = t_addr->sin_addr.S_un.S_addr; 714 t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask); 715 *maskp = t_addr->sin_addr.S_un.S_addr; 716 717 *netp &= *maskp; 718 return (0); 719 } 720 721 } 722 723 *netp = *maskp = 0; 724 return (0); 725} 726 727#endif /* !WIN32 && !MSDOS */
| 650 if (*maskp == 0) { 651 if (IN_CLASSA(*netp)) 652 *maskp = IN_CLASSA_NET; 653 else if (IN_CLASSB(*netp)) 654 *maskp = IN_CLASSB_NET; 655 else if (IN_CLASSC(*netp)) 656 *maskp = IN_CLASSC_NET; 657 else { 658 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 659 "inet class for 0x%x unknown", *netp); 660 return (-1); 661 } 662 } 663 *netp &= *maskp; 664 return (0); 665} 666 667#elif defined(WIN32) 668 669/* 670 * Return the name of a network interface attached to the system, or NULL 671 * if none can be found. The interface must be configured up; the 672 * lowest unit number is preferred; loopback is ignored. 673 */ 674char * 675pcap_lookupdev(errbuf) 676 register char *errbuf; 677{ 678 DWORD dwVersion; 679 DWORD dwWindowsMajorVersion; 680 dwVersion = GetVersion(); /* get the OS version */ 681 dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion))); 682 683 if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) { 684 /* 685 * Windows 95, 98, ME. 686 */ 687 ULONG NameLength = 8192; 688 static char AdaptersName[8192]; 689 690 if (PacketGetAdapterNames(AdaptersName,&NameLength) ) 691 return (AdaptersName); 692 else 693 return NULL; 694 } else { 695 /* 696 * Windows NT (NT 4.0, W2K, WXP). Convert the names to UNICODE for backward compatibility 697 */ 698 ULONG NameLength = 8192; 699 static WCHAR AdaptersName[8192]; 700 char *tAstr; 701 WCHAR *tUstr; 702 WCHAR *TAdaptersName = (WCHAR*)malloc(8192 * sizeof(WCHAR)); 703 int NAdapts = 0; 704 705 if(TAdaptersName == NULL) 706 { 707 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure"); 708 return NULL; 709 } 710 711 if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) ) 712 { 713 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, 714 "PacketGetAdapterNames: %s", 715 pcap_win32strerror()); 716 free(TAdaptersName); 717 return NULL; 718 } 719 720 721 tAstr = (char*)TAdaptersName; 722 tUstr = (WCHAR*)AdaptersName; 723 724 /* 725 * Convert and copy the device names 726 */ 727 while(sscanf(tAstr, "%S", tUstr) > 0) 728 { 729 tAstr += strlen(tAstr) + 1; 730 tUstr += wcslen(tUstr) + 1; 731 NAdapts ++; 732 } 733 734 tAstr++; 735 *tUstr = 0; 736 tUstr++; 737 738 /* 739 * Copy the descriptions 740 */ 741 while(NAdapts--) 742 { 743 strcpy((char*)tUstr, tAstr); 744 (char*)tUstr += strlen(tAstr) + 1;; 745 tAstr += strlen(tAstr) + 1; 746 } 747 748 free(TAdaptersName); 749 return (char *)(AdaptersName); 750 } 751} 752 753 754int 755pcap_lookupnet(device, netp, maskp, errbuf) 756 register const char *device; 757 register bpf_u_int32 *netp, *maskp; 758 register char *errbuf; 759{ 760 /* 761 * We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo() 762 * in order to skip non IPv4 (i.e. IPv6 addresses) 763 */ 764 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES]; 765 LONG if_addr_size = 1; 766 struct sockaddr_in *t_addr; 767 unsigned int i; 768 769 if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) { 770 *netp = *maskp = 0; 771 return (0); 772 } 773 774 for(i=0; i<MAX_NETWORK_ADDRESSES; i++) 775 { 776 if(if_addrs[i].IPAddress.ss_family == AF_INET) 777 { 778 t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress); 779 *netp = t_addr->sin_addr.S_un.S_addr; 780 t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask); 781 *maskp = t_addr->sin_addr.S_un.S_addr; 782 783 *netp &= *maskp; 784 return (0); 785 } 786 787 } 788 789 *netp = *maskp = 0; 790 return (0); 791} 792 793#endif /* !WIN32 && !MSDOS */
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