The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 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 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 35 | #ifdef HAVE_CONFIG_H |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 36 | #include <config.h> |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 37 | #endif |
| 38 | |
| 39 | #include <sys/param.h> |
| 40 | #include <sys/file.h> |
| 41 | #include <sys/ioctl.h> |
| 42 | #include <sys/socket.h> |
| 43 | #ifdef HAVE_SYS_SOCKIO_H |
| 44 | #include <sys/sockio.h> |
| 45 | #endif |
| 46 | #include <sys/time.h> /* concession to AIX */ |
| 47 | |
| 48 | struct mbuf; /* Squelch compiler warnings on some platforms for */ |
| 49 | struct rtentry; /* declarations in <net/if.h> */ |
| 50 | #include <net/if.h> |
| 51 | #include <netinet/in.h> |
| 52 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 53 | #include <errno.h> |
| 54 | #include <memory.h> |
| 55 | #include <stdio.h> |
| 56 | #include <stdlib.h> |
| 57 | #include <string.h> |
| 58 | #include <unistd.h> |
| 59 | |
| 60 | #include "pcap-int.h" |
| 61 | |
| 62 | #ifdef HAVE_OS_PROTO_H |
| 63 | #include "os-proto.h" |
| 64 | #endif |
| 65 | |
| 66 | /* |
| 67 | * Get a list of all interfaces that are up and that we can open. |
| 68 | * Returns -1 on error, 0 otherwise. |
| 69 | * The list, as returned through "alldevsp", may be null if no interfaces |
| 70 | * were up and could be opened. |
| 71 | * |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 72 | * This is the implementation used on platforms that have SIOCGLIFCONF |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 73 | * but don't have "getifaddrs()". (Solaris 8 and later; we use |
JP Abgrall | 511eca3 | 2014-02-12 13:46:45 -0800 | [diff] [blame] | 74 | * SIOCGLIFCONF rather than SIOCGIFCONF in order to get IPv6 addresses.) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 75 | */ |
| 76 | int |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 77 | pcap_findalldevs_interfaces(pcap_if_list_t *devlistp, char *errbuf, |
| 78 | int (*check_usable)(const char *), get_if_flags_func get_flags_func) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 79 | { |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 80 | register int fd4, fd6, fd; |
| 81 | register struct lifreq *ifrp, *ifend; |
| 82 | struct lifnum ifn; |
| 83 | struct lifconf ifc; |
| 84 | char *buf = NULL; |
| 85 | unsigned buf_size; |
| 86 | #ifdef HAVE_SOLARIS |
| 87 | char *p, *q; |
| 88 | #endif |
| 89 | struct lifreq ifrflags, ifrnetmask, ifrbroadaddr, ifrdstaddr; |
| 90 | struct sockaddr *netmask, *broadaddr, *dstaddr; |
| 91 | int ret = 0; |
| 92 | |
| 93 | /* |
| 94 | * Create a socket from which to fetch the list of interfaces, |
| 95 | * and from which to fetch IPv4 information. |
| 96 | */ |
| 97 | fd4 = socket(AF_INET, SOCK_DGRAM, 0); |
| 98 | if (fd4 < 0) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 99 | pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, |
| 100 | errno, "socket: AF_INET"); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 101 | return (-1); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Create a socket from which to fetch IPv6 information. |
| 106 | */ |
| 107 | fd6 = socket(AF_INET6, SOCK_DGRAM, 0); |
| 108 | if (fd6 < 0) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 109 | pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, |
| 110 | errno, "socket: AF_INET6"); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 111 | (void)close(fd4); |
| 112 | return (-1); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * How many entries will SIOCGLIFCONF return? |
| 117 | */ |
| 118 | ifn.lifn_family = AF_UNSPEC; |
| 119 | ifn.lifn_flags = 0; |
| 120 | ifn.lifn_count = 0; |
| 121 | if (ioctl(fd4, SIOCGLIFNUM, (char *)&ifn) < 0) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 122 | pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, |
| 123 | errno, "SIOCGLIFNUM"); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 124 | (void)close(fd6); |
| 125 | (void)close(fd4); |
| 126 | return (-1); |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Allocate a buffer for those entries. |
| 131 | */ |
| 132 | buf_size = ifn.lifn_count * sizeof (struct lifreq); |
| 133 | buf = malloc(buf_size); |
| 134 | if (buf == NULL) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 135 | pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, |
| 136 | errno, "malloc"); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 137 | (void)close(fd6); |
| 138 | (void)close(fd4); |
| 139 | return (-1); |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * Get the entries. |
| 144 | */ |
| 145 | ifc.lifc_len = buf_size; |
| 146 | ifc.lifc_buf = buf; |
| 147 | ifc.lifc_family = AF_UNSPEC; |
| 148 | ifc.lifc_flags = 0; |
| 149 | memset(buf, 0, buf_size); |
| 150 | if (ioctl(fd4, SIOCGLIFCONF, (char *)&ifc) < 0) { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 151 | pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, |
| 152 | errno, "SIOCGLIFCONF"); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 153 | (void)close(fd6); |
| 154 | (void)close(fd4); |
| 155 | free(buf); |
| 156 | return (-1); |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Loop over the entries. |
| 161 | */ |
| 162 | ifrp = (struct lifreq *)buf; |
| 163 | ifend = (struct lifreq *)(buf + ifc.lifc_len); |
| 164 | |
| 165 | for (; ifrp < ifend; ifrp++) { |
| 166 | /* |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 167 | * Skip entries that begin with "dummy". |
| 168 | * XXX - what are these? Is this Linux-specific? |
| 169 | * Are there platforms on which we shouldn't do this? |
| 170 | */ |
| 171 | if (strncmp(ifrp->lifr_name, "dummy", 5) == 0) |
| 172 | continue; |
| 173 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 174 | /* |
Elliott Hughes | 965a4b5 | 2017-05-15 10:37:39 -0700 | [diff] [blame] | 175 | * Can we capture on this device? |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 176 | */ |
Elliott Hughes | 965a4b5 | 2017-05-15 10:37:39 -0700 | [diff] [blame] | 177 | if (!(*check_usable)(ifrp->lifr_name)) { |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 178 | /* |
Elliott Hughes | 965a4b5 | 2017-05-15 10:37:39 -0700 | [diff] [blame] | 179 | * No. |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 180 | */ |
Elliott Hughes | 965a4b5 | 2017-05-15 10:37:39 -0700 | [diff] [blame] | 181 | continue; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 182 | } |
Elliott Hughes | 965a4b5 | 2017-05-15 10:37:39 -0700 | [diff] [blame] | 183 | |
| 184 | /* |
| 185 | * IPv6 or not? |
| 186 | */ |
| 187 | if (((struct sockaddr *)&ifrp->lifr_addr)->sa_family == AF_INET6) |
| 188 | fd = fd6; |
| 189 | else |
| 190 | fd = fd4; |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 191 | |
| 192 | /* |
Elliott Hughes | d8845d7 | 2015-10-19 18:07:04 -0700 | [diff] [blame] | 193 | * Get the flags for this interface. |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 194 | */ |
| 195 | strncpy(ifrflags.lifr_name, ifrp->lifr_name, |
| 196 | sizeof(ifrflags.lifr_name)); |
| 197 | if (ioctl(fd, SIOCGLIFFLAGS, (char *)&ifrflags) < 0) { |
| 198 | if (errno == ENXIO) |
| 199 | continue; |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 200 | pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, |
| 201 | errno, "SIOCGLIFFLAGS: %.*s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 202 | (int)sizeof(ifrflags.lifr_name), |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 203 | ifrflags.lifr_name); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 204 | ret = -1; |
| 205 | break; |
| 206 | } |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 207 | |
| 208 | /* |
| 209 | * Get the netmask for this address on this interface. |
| 210 | */ |
| 211 | strncpy(ifrnetmask.lifr_name, ifrp->lifr_name, |
| 212 | sizeof(ifrnetmask.lifr_name)); |
| 213 | memcpy(&ifrnetmask.lifr_addr, &ifrp->lifr_addr, |
| 214 | sizeof(ifrnetmask.lifr_addr)); |
| 215 | if (ioctl(fd, SIOCGLIFNETMASK, (char *)&ifrnetmask) < 0) { |
| 216 | if (errno == EADDRNOTAVAIL) { |
| 217 | /* |
| 218 | * Not available. |
| 219 | */ |
| 220 | netmask = NULL; |
| 221 | } else { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 222 | pcap_fmt_errmsg_for_errno(errbuf, |
| 223 | PCAP_ERRBUF_SIZE, errno, |
| 224 | "SIOCGLIFNETMASK: %.*s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 225 | (int)sizeof(ifrnetmask.lifr_name), |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 226 | ifrnetmask.lifr_name); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 227 | ret = -1; |
| 228 | break; |
| 229 | } |
| 230 | } else |
| 231 | netmask = (struct sockaddr *)&ifrnetmask.lifr_addr; |
| 232 | |
| 233 | /* |
| 234 | * Get the broadcast address for this address on this |
| 235 | * interface (if any). |
| 236 | */ |
| 237 | if (ifrflags.lifr_flags & IFF_BROADCAST) { |
| 238 | strncpy(ifrbroadaddr.lifr_name, ifrp->lifr_name, |
| 239 | sizeof(ifrbroadaddr.lifr_name)); |
| 240 | memcpy(&ifrbroadaddr.lifr_addr, &ifrp->lifr_addr, |
| 241 | sizeof(ifrbroadaddr.lifr_addr)); |
| 242 | if (ioctl(fd, SIOCGLIFBRDADDR, |
| 243 | (char *)&ifrbroadaddr) < 0) { |
| 244 | if (errno == EADDRNOTAVAIL) { |
| 245 | /* |
| 246 | * Not available. |
| 247 | */ |
| 248 | broadaddr = NULL; |
| 249 | } else { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 250 | pcap_fmt_errmsg_for_errno(errbuf, |
| 251 | PCAP_ERRBUF_SIZE, errno, |
| 252 | "SIOCGLIFBRDADDR: %.*s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 253 | (int)sizeof(ifrbroadaddr.lifr_name), |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 254 | ifrbroadaddr.lifr_name); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 255 | ret = -1; |
| 256 | break; |
| 257 | } |
| 258 | } else |
| 259 | broadaddr = (struct sockaddr *)&ifrbroadaddr.lifr_broadaddr; |
| 260 | } else { |
| 261 | /* |
| 262 | * Not a broadcast interface, so no broadcast |
| 263 | * address. |
| 264 | */ |
| 265 | broadaddr = NULL; |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * Get the destination address for this address on this |
| 270 | * interface (if any). |
| 271 | */ |
| 272 | if (ifrflags.lifr_flags & IFF_POINTOPOINT) { |
| 273 | strncpy(ifrdstaddr.lifr_name, ifrp->lifr_name, |
| 274 | sizeof(ifrdstaddr.lifr_name)); |
| 275 | memcpy(&ifrdstaddr.lifr_addr, &ifrp->lifr_addr, |
| 276 | sizeof(ifrdstaddr.lifr_addr)); |
| 277 | if (ioctl(fd, SIOCGLIFDSTADDR, |
| 278 | (char *)&ifrdstaddr) < 0) { |
| 279 | if (errno == EADDRNOTAVAIL) { |
| 280 | /* |
| 281 | * Not available. |
| 282 | */ |
| 283 | dstaddr = NULL; |
| 284 | } else { |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 285 | pcap_fmt_errmsg_for_errno(errbuf, |
| 286 | PCAP_ERRBUF_SIZE, errno, |
| 287 | "SIOCGLIFDSTADDR: %.*s", |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 288 | (int)sizeof(ifrdstaddr.lifr_name), |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 289 | ifrdstaddr.lifr_name); |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 290 | ret = -1; |
| 291 | break; |
| 292 | } |
| 293 | } else |
| 294 | dstaddr = (struct sockaddr *)&ifrdstaddr.lifr_dstaddr; |
| 295 | } else |
| 296 | dstaddr = NULL; |
| 297 | |
| 298 | #ifdef HAVE_SOLARIS |
| 299 | /* |
| 300 | * If this entry has a colon followed by a number at |
| 301 | * the end, it's a logical interface. Those are just |
| 302 | * the way you assign multiple IP addresses to a real |
| 303 | * interface, so an entry for a logical interface should |
| 304 | * be treated like the entry for the real interface; |
| 305 | * we do that by stripping off the ":" and the number. |
| 306 | */ |
| 307 | p = strchr(ifrp->lifr_name, ':'); |
| 308 | if (p != NULL) { |
| 309 | /* |
| 310 | * We have a ":"; is it followed by a number? |
| 311 | */ |
| 312 | q = p + 1; |
Haibo Huang | ee759ce | 2021-01-05 21:34:29 -0800 | [diff] [blame] | 313 | while (PCAP_ISDIGIT(*q)) |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 314 | q++; |
| 315 | if (*q == '\0') { |
| 316 | /* |
| 317 | * All digits after the ":" until the end. |
| 318 | * Strip off the ":" and everything after |
| 319 | * it. |
| 320 | */ |
| 321 | *p = '\0'; |
| 322 | } |
| 323 | } |
| 324 | #endif |
| 325 | |
| 326 | /* |
| 327 | * Add information for this address to the list. |
| 328 | */ |
Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 329 | if (add_addr_to_if(devlistp, ifrp->lifr_name, |
| 330 | ifrflags.lifr_flags, get_flags_func, |
Elliott Hughes | 965a4b5 | 2017-05-15 10:37:39 -0700 | [diff] [blame] | 331 | (struct sockaddr *)&ifrp->lifr_addr, |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 332 | sizeof (struct sockaddr_storage), |
| 333 | netmask, sizeof (struct sockaddr_storage), |
| 334 | broadaddr, sizeof (struct sockaddr_storage), |
| 335 | dstaddr, sizeof (struct sockaddr_storage), errbuf) < 0) { |
| 336 | ret = -1; |
| 337 | break; |
| 338 | } |
| 339 | } |
| 340 | free(buf); |
| 341 | (void)close(fd6); |
| 342 | (void)close(fd4); |
| 343 | |
The Android Open Source Project | 478ab6c | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 344 | return (ret); |
| 345 | } |