The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * dhcpcd - DHCP client daemon |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 3 | * Copyright (c) 2006-2012 Roy Marples <roy@marples.name> |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 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 | * 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 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 | * SUCH DAMAGE. |
| 26 | */ |
| 27 | |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 28 | #include <sys/ioctl.h> |
| 29 | #include <sys/param.h> |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 30 | #include <sys/socket.h> |
| 31 | #include <sys/stat.h> |
| 32 | #include <sys/sysctl.h> |
| 33 | #include <sys/types.h> |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 34 | |
| 35 | #include <arpa/inet.h> |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 36 | #include <net/if.h> |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 37 | #include <net/if_dl.h> |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 38 | #include <net/route.h> |
| 39 | #include <netinet/in.h> |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 40 | #ifdef __DragonFly__ |
| 41 | # include <netproto/802_11/ieee80211_ioctl.h> |
| 42 | #elif __APPLE__ |
| 43 | /* FIXME: Add apple includes so we can work out SSID */ |
| 44 | #else |
| 45 | # include <net80211/ieee80211_ioctl.h> |
| 46 | #endif |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 47 | |
| 48 | #include <errno.h> |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 49 | #include <fnmatch.h> |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 50 | #include <stddef.h> |
| 51 | #include <stdio.h> |
| 52 | #include <stdlib.h> |
| 53 | #include <string.h> |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 54 | #include <syslog.h> |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 55 | #include <unistd.h> |
| 56 | |
| 57 | #include "config.h" |
| 58 | #include "common.h" |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 59 | #include "configure.h" |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 60 | #include "dhcp.h" |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 61 | #include "if-options.h" |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 62 | #include "net.h" |
| 63 | |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 64 | #ifndef RT_ROUNDUP |
| 65 | #define RT_ROUNDUP(a) \ |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 66 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 67 | #define RT_ADVANCE(x, n) (x += RT_ROUNDUP((n)->sa_len)) |
| 68 | #endif |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 69 | |
| 70 | /* FIXME: Why do we need to check for sa_family 255 */ |
| 71 | #define COPYOUT(sin, sa) \ |
| 72 | sin.s_addr = ((sa) != NULL) ? \ |
| 73 | (((struct sockaddr_in *)(void *)sa)->sin_addr).s_addr : 0 |
| 74 | |
| 75 | static int r_fd = -1; |
| 76 | static char *link_buf; |
| 77 | static ssize_t link_buflen; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 78 | |
| 79 | int |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 80 | if_init(_unused struct interface *iface) |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 81 | { |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 82 | /* BSD promotes secondary address by default */ |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | int |
| 87 | if_conf(_unused struct interface *iface) |
| 88 | { |
| 89 | /* No extra checks needed on BSD */ |
| 90 | return 0; |
| 91 | } |
| 92 | |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 93 | #ifdef DEBUG_MEMORY |
| 94 | static void |
| 95 | cleanup(void) |
| 96 | { |
| 97 | |
| 98 | free(link_buf); |
| 99 | } |
| 100 | #endif |
| 101 | |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 102 | int |
| 103 | init_sockets(void) |
| 104 | { |
| 105 | if ((socket_afnet = socket(AF_INET, SOCK_DGRAM, 0)) == -1) |
| 106 | return -1; |
| 107 | set_cloexec(socket_afnet); |
| 108 | if ((r_fd = socket(PF_ROUTE, SOCK_RAW, 0)) == -1) |
| 109 | return -1; |
| 110 | set_cloexec(r_fd); |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | int |
| 115 | getifssid(const char *ifname, char *ssid) |
| 116 | { |
| 117 | int retval = -1; |
| 118 | #if defined(SIOCG80211NWID) |
| 119 | struct ifreq ifr; |
| 120 | struct ieee80211_nwid nwid; |
| 121 | #elif defined(IEEE80211_IOC_SSID) |
| 122 | struct ieee80211req ireq; |
| 123 | char nwid[IEEE80211_NWID_LEN + 1]; |
| 124 | #endif |
| 125 | |
| 126 | #if defined(SIOCG80211NWID) /* NetBSD */ |
| 127 | memset(&ifr, 0, sizeof(ifr)); |
| 128 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
| 129 | memset(&nwid, 0, sizeof(nwid)); |
| 130 | ifr.ifr_data = (void *)&nwid; |
| 131 | if (ioctl(socket_afnet, SIOCG80211NWID, &ifr) == 0) { |
| 132 | retval = nwid.i_len; |
| 133 | memcpy(ssid, nwid.i_nwid, nwid.i_len); |
| 134 | ssid[nwid.i_len] = '\0'; |
| 135 | } |
| 136 | #elif defined(IEEE80211_IOC_SSID) /* FreeBSD */ |
| 137 | memset(&ireq, 0, sizeof(ireq)); |
| 138 | strlcpy(ireq.i_name, ifname, sizeof(ireq.i_name)); |
| 139 | ireq.i_type = IEEE80211_IOC_SSID; |
| 140 | ireq.i_val = -1; |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 141 | memset(nwid, 0, sizeof(nwid)); |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 142 | ireq.i_data = &nwid; |
| 143 | if (ioctl(socket_afnet, SIOCG80211, &ireq) == 0) { |
| 144 | retval = ireq.i_len; |
| 145 | memcpy(ssid, nwid, ireq.i_len); |
| 146 | ssid[ireq.i_len] = '\0'; |
| 147 | } |
| 148 | #endif |
| 149 | return retval; |
| 150 | } |
| 151 | |
| 152 | int |
| 153 | if_address(const struct interface *iface, const struct in_addr *address, |
| 154 | const struct in_addr *netmask, const struct in_addr *broadcast, |
| 155 | int action) |
| 156 | { |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 157 | int retval; |
| 158 | struct ifaliasreq ifa; |
| 159 | union { |
| 160 | struct sockaddr *sa; |
| 161 | struct sockaddr_in *sin; |
| 162 | } _s; |
| 163 | |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 164 | memset(&ifa, 0, sizeof(ifa)); |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 165 | strlcpy(ifa.ifra_name, iface->name, sizeof(ifa.ifra_name)); |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 166 | |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 167 | #define ADDADDR(_var, _addr) { \ |
| 168 | _s.sa = &_var; \ |
| 169 | _s.sin->sin_family = AF_INET; \ |
| 170 | _s.sin->sin_len = sizeof(*_s.sin); \ |
| 171 | memcpy(&_s.sin->sin_addr, _addr, sizeof(_s.sin->sin_addr)); \ |
| 172 | } |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 173 | |
| 174 | ADDADDR(ifa.ifra_addr, address); |
| 175 | ADDADDR(ifa.ifra_mask, netmask); |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 176 | if (action >= 0 && broadcast) { |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 177 | ADDADDR(ifa.ifra_broadaddr, broadcast); |
| 178 | } |
| 179 | #undef ADDADDR |
| 180 | |
| 181 | if (action < 0) |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 182 | retval = ioctl(socket_afnet, SIOCDIFADDR, &ifa); |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 183 | else |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 184 | retval = ioctl(socket_afnet, SIOCAIFADDR, &ifa); |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 185 | return retval; |
| 186 | } |
| 187 | |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 188 | /* ARGSUSED4 */ |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 189 | int |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 190 | if_route(const struct rt *rt, int action) |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 191 | { |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 192 | union sockunion { |
| 193 | struct sockaddr sa; |
| 194 | struct sockaddr_in sin; |
| 195 | #ifdef INET6 |
| 196 | struct sockaddr_in6 sin6; |
| 197 | #endif |
| 198 | struct sockaddr_dl sdl; |
| 199 | struct sockaddr_storage ss; |
| 200 | } su; |
| 201 | struct rtm |
| 202 | { |
| 203 | struct rt_msghdr hdr; |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 204 | char buffer[sizeof(su) * 4]; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 205 | } rtm; |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 206 | char *bp = rtm.buffer; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 207 | size_t l; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 208 | int retval = 0; |
| 209 | |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 210 | #define ADDSU(_su) { \ |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 211 | l = RT_ROUNDUP(_su.sa.sa_len); \ |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 212 | memcpy(bp, &(_su), l); \ |
| 213 | bp += l; \ |
| 214 | } |
| 215 | #define ADDADDR(_a) { \ |
| 216 | memset (&su, 0, sizeof(su)); \ |
| 217 | su.sin.sin_family = AF_INET; \ |
| 218 | su.sin.sin_len = sizeof(su.sin); \ |
| 219 | memcpy (&su.sin.sin_addr, _a, sizeof(su.sin.sin_addr)); \ |
| 220 | ADDSU(su); \ |
| 221 | } |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 222 | |
| 223 | memset(&rtm, 0, sizeof(rtm)); |
| 224 | rtm.hdr.rtm_version = RTM_VERSION; |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 225 | rtm.hdr.rtm_seq = 1; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 226 | if (action == 0) |
| 227 | rtm.hdr.rtm_type = RTM_CHANGE; |
| 228 | else if (action > 0) |
| 229 | rtm.hdr.rtm_type = RTM_ADD; |
| 230 | else |
| 231 | rtm.hdr.rtm_type = RTM_DELETE; |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 232 | rtm.hdr.rtm_flags = RTF_UP; |
| 233 | /* None interface subnet routes are static. */ |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 234 | if (rt->gate.s_addr != INADDR_ANY || |
| 235 | rt->net.s_addr != rt->iface->net.s_addr || |
| 236 | rt->dest.s_addr != (rt->iface->addr.s_addr & rt->iface->net.s_addr)) |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 237 | rtm.hdr.rtm_flags |= RTF_STATIC; |
| 238 | rtm.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 239 | if (rt->dest.s_addr == rt->gate.s_addr && |
| 240 | rt->net.s_addr == INADDR_BROADCAST) |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 241 | rtm.hdr.rtm_flags |= RTF_HOST; |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 242 | else { |
| 243 | rtm.hdr.rtm_addrs |= RTA_NETMASK; |
| 244 | if (rtm.hdr.rtm_flags & RTF_STATIC) |
| 245 | rtm.hdr.rtm_flags |= RTF_GATEWAY; |
| 246 | if (action >= 0) |
| 247 | rtm.hdr.rtm_addrs |= RTA_IFA; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 248 | } |
| 249 | |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 250 | ADDADDR(&rt->dest); |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 251 | if (rtm.hdr.rtm_flags & RTF_HOST || |
| 252 | !(rtm.hdr.rtm_flags & RTF_STATIC)) |
| 253 | { |
| 254 | /* Make us a link layer socket for the host gateway */ |
| 255 | memset(&su, 0, sizeof(su)); |
| 256 | su.sdl.sdl_len = sizeof(struct sockaddr_dl); |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 257 | link_addr(rt->iface->name, &su.sdl); |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 258 | ADDSU(su); |
| 259 | } else |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 260 | ADDADDR(&rt->gate); |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 261 | |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 262 | if (rtm.hdr.rtm_addrs & RTA_NETMASK) |
| 263 | ADDADDR(&rt->net); |
Dmitry Shmidt | 938bc38 | 2010-01-08 10:47:26 -0800 | [diff] [blame] | 264 | |
| 265 | if (rtm.hdr.rtm_addrs & RTA_IFA) |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 266 | ADDADDR(&rt->iface->addr); |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 267 | |
| 268 | rtm.hdr.rtm_msglen = l = bp - (char *)&rtm; |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 269 | if (write(r_fd, &rtm, l) == -1) |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 270 | retval = -1; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 271 | return retval; |
| 272 | } |
| 273 | |
| 274 | int |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 275 | open_link_socket(void) |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 276 | { |
| 277 | int fd; |
| 278 | |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 279 | #ifdef DEBUG_MEMORY |
| 280 | if (link_buf == NULL) |
| 281 | atexit(cleanup); |
| 282 | #endif |
| 283 | |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 284 | fd = socket(PF_ROUTE, SOCK_RAW, 0); |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 285 | if (fd != -1) { |
| 286 | set_cloexec(fd); |
| 287 | set_nonblock(fd); |
| 288 | } |
| 289 | return fd; |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 290 | } |
| 291 | |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 292 | static void |
| 293 | get_addrs(int type, char *cp, struct sockaddr **sa) |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 294 | { |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 295 | int i; |
| 296 | |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 297 | for (i = 0; i < RTAX_MAX; i++) { |
| 298 | if (type & (1 << i)) { |
| 299 | sa[i] = (struct sockaddr *)cp; |
| 300 | #ifdef DEBUG |
| 301 | printf ("got %d %d %s\n", i, sa[i]->sa_family, |
| 302 | inet_ntoa(((struct sockaddr_in *)sa[i])-> |
| 303 | sin_addr)); |
| 304 | #endif |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 305 | RT_ADVANCE(cp, sa[i]); |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 306 | } else |
| 307 | sa[i] = NULL; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | int |
| 312 | manage_link(int fd) |
| 313 | { |
| 314 | char *p, *e, *cp; |
| 315 | char ifname[IF_NAMESIZE]; |
| 316 | ssize_t bytes; |
| 317 | struct rt_msghdr *rtm; |
| 318 | struct if_announcemsghdr *ifan; |
| 319 | struct if_msghdr *ifm; |
| 320 | struct ifa_msghdr *ifam; |
| 321 | struct rt rt; |
| 322 | struct sockaddr *sa, *rti_info[RTAX_MAX]; |
| 323 | int len; |
| 324 | #ifdef RTM_CHGADDR |
| 325 | struct sockaddr_dl sdl; |
| 326 | unsigned char *hwaddr; |
| 327 | #endif |
| 328 | |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 329 | for (;;) { |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 330 | if (ioctl(fd, FIONREAD, &len) == -1) |
| 331 | return -1; |
| 332 | if (link_buflen < len) { |
| 333 | p = realloc(link_buf, len); |
| 334 | if (p == NULL) |
| 335 | return -1; |
| 336 | link_buf = p; |
| 337 | link_buflen = len; |
| 338 | } |
| 339 | bytes = read(fd, link_buf, link_buflen); |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 340 | if (bytes == -1) { |
| 341 | if (errno == EAGAIN) |
| 342 | return 0; |
| 343 | if (errno == EINTR) |
| 344 | continue; |
| 345 | return -1; |
| 346 | } |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 347 | e = link_buf + bytes; |
| 348 | for (p = link_buf; p < e; p += rtm->rtm_msglen) { |
| 349 | rtm = (struct rt_msghdr *)(void *)p; |
| 350 | switch(rtm->rtm_type) { |
| 351 | #ifdef RTM_IFANNOUNCE |
| 352 | case RTM_IFANNOUNCE: |
| 353 | ifan = (struct if_announcemsghdr *)(void *)p; |
| 354 | switch(ifan->ifan_what) { |
| 355 | case IFAN_ARRIVAL: |
| 356 | handle_interface(1, ifan->ifan_name); |
| 357 | break; |
| 358 | case IFAN_DEPARTURE: |
| 359 | handle_interface(-1, ifan->ifan_name); |
| 360 | break; |
| 361 | } |
| 362 | break; |
| 363 | #endif |
| 364 | case RTM_IFINFO: |
| 365 | ifm = (struct if_msghdr *)(void *)p; |
| 366 | memset(ifname, 0, sizeof(ifname)); |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 367 | if (!(if_indextoname(ifm->ifm_index, ifname))) |
| 368 | break; |
| 369 | switch (ifm->ifm_data.ifi_link_state) { |
| 370 | case LINK_STATE_DOWN: |
| 371 | len = -1; |
| 372 | break; |
| 373 | case LINK_STATE_UP: |
| 374 | len = 1; |
| 375 | break; |
| 376 | default: |
| 377 | /* handle_carrier will re-load |
| 378 | * the interface flags and check for |
| 379 | * IFF_RUNNING as some drivers that |
| 380 | * don't handle link state also don't |
| 381 | * set IFF_RUNNING when this routing |
| 382 | * message is generated. |
| 383 | * As such, it is a race ...*/ |
| 384 | len = 0; |
| 385 | break; |
| 386 | } |
| 387 | handle_carrier(len, ifm->ifm_flags, ifname); |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 388 | break; |
| 389 | case RTM_DELETE: |
Dmitry Shmidt | a3a2260 | 2012-07-23 16:45:46 -0700 | [diff] [blame] | 390 | if (~rtm->rtm_addrs & |
| 391 | (RTA_DST | RTA_GATEWAY | RTA_NETMASK)) |
Dmitry Shmidt | e86eee1 | 2011-01-24 16:27:51 -0800 | [diff] [blame] | 392 | break; |
| 393 | if (rtm->rtm_pid == getpid()) |
| 394 | break; |
| 395 | cp = (char *)(void *)(rtm + 1); |
| 396 | sa = (struct sockaddr *)(void *)cp; |
| 397 | if (sa->sa_family != AF_INET) |
| 398 | break; |
| 399 | get_addrs(rtm->rtm_addrs, cp, rti_info); |
| 400 | rt.iface = NULL; |
| 401 | rt.next = NULL; |
| 402 | COPYOUT(rt.dest, rti_info[RTAX_DST]); |
| 403 | COPYOUT(rt.net, rti_info[RTAX_NETMASK]); |
| 404 | COPYOUT(rt.gate, rti_info[RTAX_GATEWAY]); |
| 405 | route_deleted(&rt); |
| 406 | break; |
| 407 | #ifdef RTM_CHGADDR |
| 408 | case RTM_CHGADDR: /* FALLTHROUGH */ |
| 409 | #endif |
| 410 | case RTM_DELADDR: /* FALLTHROUGH */ |
| 411 | case RTM_NEWADDR: |
| 412 | ifam = (struct ifa_msghdr *)(void *)p; |
| 413 | if (!if_indextoname(ifam->ifam_index, ifname)) |
| 414 | break; |
| 415 | cp = (char *)(void *)(ifam + 1); |
| 416 | get_addrs(ifam->ifam_addrs, cp, rti_info); |
| 417 | if (rti_info[RTAX_IFA] == NULL) |
| 418 | break; |
| 419 | switch (rti_info[RTAX_IFA]->sa_family) { |
| 420 | #ifdef RTM_CHGADDR |
| 421 | case AF_LINK: |
| 422 | if (rtm->rtm_type != RTM_CHGADDR) |
| 423 | break; |
| 424 | memcpy(&sdl, rti_info[RTAX_IFA], |
| 425 | rti_info[RTAX_IFA]->sa_len); |
| 426 | hwaddr = xmalloc(sdl.sdl_alen); |
| 427 | memcpy(hwaddr, LLADDR(&sdl), |
| 428 | sdl.sdl_alen); |
| 429 | handle_hwaddr(ifname, hwaddr, |
| 430 | sdl.sdl_alen); |
| 431 | break; |
| 432 | #endif |
| 433 | case AF_INET: |
| 434 | case 255: /* FIXME: Why 255? */ |
| 435 | COPYOUT(rt.dest, rti_info[RTAX_IFA]); |
| 436 | COPYOUT(rt.net, rti_info[RTAX_NETMASK]); |
| 437 | COPYOUT(rt.gate, rti_info[RTAX_BRD]); |
| 438 | handle_ifa(rtm->rtm_type, ifname, |
| 439 | &rt.dest, &rt.net, &rt.gate); |
| 440 | break; |
| 441 | } |
| 442 | break; |
| 443 | } |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 444 | } |
| 445 | } |
The Android Open Source Project | f7c5421 | 2009-03-03 19:29:22 -0800 | [diff] [blame] | 446 | } |