| File: | src/usr.sbin/rad/frontend.c |
| Warning: | line 1227, column 2 Value stored to 'len' is never read |
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| 1 | /* $OpenBSD: frontend.c,v 1.39 2021/01/19 16:54:48 florian Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2018 Florian Obser <florian@openbsd.org> |
| 5 | * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> |
| 6 | * Copyright (c) 2004 Esben Norby <norby@openbsd.org> |
| 7 | * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> |
| 8 | * |
| 9 | * Permission to use, copy, modify, and distribute this software for any |
| 10 | * purpose with or without fee is hereby granted, provided that the above |
| 11 | * copyright notice and this permission notice appear in all copies. |
| 12 | * |
| 13 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 19 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
| 24 | * All rights reserved. |
| 25 | * |
| 26 | * Redistribution and use in source and binary forms, with or without |
| 27 | * modification, are permitted provided that the following conditions |
| 28 | * are met: |
| 29 | * 1. Redistributions of source code must retain the above copyright |
| 30 | * notice, this list of conditions and the following disclaimer. |
| 31 | * 2. Redistributions in binary form must reproduce the above copyright |
| 32 | * notice, this list of conditions and the following disclaimer in the |
| 33 | * documentation and/or other materials provided with the distribution. |
| 34 | * 3. Neither the name of the project nor the names of its contributors |
| 35 | * may be used to endorse or promote products derived from this software |
| 36 | * without specific prior written permission. |
| 37 | * |
| 38 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 39 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 41 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 42 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 43 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 44 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 45 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 46 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 47 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 48 | * SUCH DAMAGE. |
| 49 | */ |
| 50 | |
| 51 | #include <sys/types.h> |
| 52 | #include <sys/ioctl.h> |
| 53 | #include <sys/queue.h> |
| 54 | #include <sys/socket.h> |
| 55 | #include <sys/syslog.h> |
| 56 | #include <sys/uio.h> |
| 57 | |
| 58 | #include <net/if.h> |
| 59 | #include <net/if_types.h> |
| 60 | #include <net/route.h> |
| 61 | |
| 62 | #include <arpa/inet.h> |
| 63 | |
| 64 | #include <netinet/in.h> |
| 65 | #include <netinet/if_ether.h> |
| 66 | #include <netinet6/nd6.h> |
| 67 | #include <netinet6/in6_var.h> |
| 68 | #include <netinet/ip6.h> |
| 69 | #include <netinet6/ip6_var.h> |
| 70 | #include <netinet/icmp6.h> |
| 71 | |
| 72 | #include <ctype.h> |
| 73 | #include <errno(*__errno()).h> |
| 74 | #include <event.h> |
| 75 | #include <ifaddrs.h> |
| 76 | #include <imsg.h> |
| 77 | #include <pwd.h> |
| 78 | #include <signal.h> |
| 79 | #include <stdio.h> |
| 80 | #include <stdlib.h> |
| 81 | #include <string.h> |
| 82 | #include <unistd.h> |
| 83 | |
| 84 | #include "log.h" |
| 85 | #include "rad.h" |
| 86 | #include "frontend.h" |
| 87 | #include "control.h" |
| 88 | |
| 89 | #define RA_MAX_SIZE1500 1500 |
| 90 | #define ROUTE_SOCKET_BUF_SIZE16384 16384 |
| 91 | |
| 92 | struct icmp6_ev { |
| 93 | struct event ev; |
| 94 | uint8_t answer[1500]; |
| 95 | struct msghdr rcvmhdr; |
| 96 | struct iovec rcviov[1]; |
| 97 | struct sockaddr_in6 from; |
| 98 | int refcnt; |
| 99 | }; |
| 100 | |
| 101 | struct ra_iface { |
| 102 | TAILQ_ENTRY(ra_iface)struct { struct ra_iface *tqe_next; struct ra_iface **tqe_prev ; } entry; |
| 103 | struct icmp6_ev *icmp6ev; |
| 104 | struct ra_prefix_conf_head prefixes; |
| 105 | char name[IF_NAMESIZE16]; |
| 106 | char conf_name[IF_NAMESIZE16]; |
| 107 | uint32_t if_index; |
| 108 | int rdomain; |
| 109 | int removed; |
| 110 | int link_state; |
| 111 | int prefix_count; |
| 112 | size_t datalen; |
| 113 | uint8_t data[RA_MAX_SIZE1500]; |
| 114 | }; |
| 115 | |
| 116 | TAILQ_HEAD(, ra_iface)struct { struct ra_iface *tqh_first; struct ra_iface **tqh_last ; } ra_interfaces; |
| 117 | |
| 118 | __dead__attribute__((__noreturn__)) void frontend_shutdown(void); |
| 119 | void frontend_sig_handler(int, short, void *); |
| 120 | void frontend_startup(void); |
| 121 | void icmp6_receive(int, short, void *); |
| 122 | void join_all_routers_mcast_group(struct ra_iface *); |
| 123 | void leave_all_routers_mcast_group(struct ra_iface *); |
| 124 | int get_link_state(char *); |
| 125 | int get_ifrdomain(char *); |
| 126 | void merge_ra_interface(char *, char *); |
| 127 | void merge_ra_interfaces(void); |
| 128 | struct ra_iface *find_ra_iface_by_id(uint32_t); |
| 129 | struct ra_iface *find_ra_iface_by_name(char *); |
| 130 | struct ra_iface_conf *find_ra_iface_conf(struct ra_iface_conf_head *, |
| 131 | char *); |
| 132 | struct ra_prefix_conf *find_ra_prefix_conf(struct ra_prefix_conf_head*, |
| 133 | struct in6_addr *, int); |
| 134 | struct icmp6_ev *get_icmp6ev_by_rdomain(int); |
| 135 | void unref_icmp6ev(struct ra_iface *); |
| 136 | void set_icmp6sock(int, int); |
| 137 | void add_new_prefix_to_ra_iface(struct ra_iface *r, |
| 138 | struct in6_addr *, int, struct ra_prefix_conf *); |
| 139 | void free_ra_iface(struct ra_iface *); |
| 140 | int in6_mask2prefixlen(struct in6_addr *); |
| 141 | void get_interface_prefixes(struct ra_iface *, |
| 142 | struct ra_prefix_conf *); |
| 143 | int interface_has_linklocal_address(char *); |
| 144 | void build_packet(struct ra_iface *); |
| 145 | void build_leaving_packet(struct ra_iface *); |
| 146 | void ra_output(struct ra_iface *, struct sockaddr_in6 *); |
| 147 | void get_rtaddrs(int, struct sockaddr *, |
| 148 | struct sockaddr **); |
| 149 | void route_receive(int, short, void *); |
| 150 | void handle_route_message(struct rt_msghdr *, |
| 151 | struct sockaddr **); |
| 152 | |
| 153 | struct rad_conf *frontend_conf; |
| 154 | static struct imsgev *iev_main; |
| 155 | static struct imsgev *iev_engine; |
| 156 | struct event ev_route; |
| 157 | int ioctlsock = -1, routesock = -1; |
| 158 | struct ipv6_mreq all_routers; |
| 159 | struct msghdr sndmhdr; |
| 160 | struct iovec sndiov[2]; |
| 161 | |
| 162 | void |
| 163 | frontend_sig_handler(int sig, short event, void *bula) |
| 164 | { |
| 165 | /* |
| 166 | * Normal signal handler rules don't apply because libevent |
| 167 | * decouples for us. |
| 168 | */ |
| 169 | |
| 170 | switch (sig) { |
| 171 | case SIGINT2: |
| 172 | case SIGTERM15: |
| 173 | frontend_shutdown(); |
| 174 | default: |
| 175 | fatalx("unexpected signal"); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | void |
| 180 | frontend(int debug, int verbose) |
| 181 | { |
| 182 | struct event ev_sigint, ev_sigterm; |
| 183 | struct passwd *pw; |
| 184 | size_t sndcmsgbuflen; |
| 185 | uint8_t *sndcmsgbuf = NULL((void *)0); |
| 186 | |
| 187 | frontend_conf = config_new_empty(); |
| 188 | |
| 189 | log_init(debug, LOG_DAEMON(3<<3)); |
| 190 | log_setverbose(verbose); |
| 191 | |
| 192 | if ((pw = getpwnam(RAD_USER"_rad")) == NULL((void *)0)) |
| 193 | fatal("getpwnam"); |
| 194 | |
| 195 | if (chroot(pw->pw_dir) == -1) |
| 196 | fatal("chroot"); |
| 197 | if (chdir("/") == -1) |
| 198 | fatal("chdir(\"/\")"); |
| 199 | |
| 200 | setproctitle("%s", "frontend"); |
| 201 | log_procinit("frontend"); |
| 202 | |
| 203 | if (setgroups(1, &pw->pw_gid) || |
| 204 | setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) || |
| 205 | setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) |
| 206 | fatal("can't drop privileges"); |
| 207 | |
| 208 | /* XXX pass in from main */ |
| 209 | if ((ioctlsock = socket(AF_INET624, SOCK_DGRAM2 | SOCK_CLOEXEC0x8000, 0)) == -1) |
| 210 | fatal("socket"); |
| 211 | |
| 212 | if (pledge("stdio inet unix recvfd route mcast", NULL((void *)0)) == -1) |
| 213 | fatal("pledge"); |
| 214 | |
| 215 | event_init(); |
| 216 | |
| 217 | /* Setup signal handler. */ |
| 218 | signal_set(&ev_sigint, SIGINT, frontend_sig_handler, NULL)event_set(&ev_sigint, 2, 0x08|0x10, frontend_sig_handler, ((void *)0)); |
| 219 | signal_set(&ev_sigterm, SIGTERM, frontend_sig_handler, NULL)event_set(&ev_sigterm, 15, 0x08|0x10, frontend_sig_handler , ((void *)0)); |
| 220 | signal_add(&ev_sigint, NULL)event_add(&ev_sigint, ((void *)0)); |
| 221 | signal_add(&ev_sigterm, NULL)event_add(&ev_sigterm, ((void *)0)); |
| 222 | signal(SIGPIPE13, SIG_IGN(void (*)(int))1); |
| 223 | signal(SIGHUP1, SIG_IGN(void (*)(int))1); |
| 224 | |
| 225 | /* Setup pipe and event handler to the parent process. */ |
| 226 | if ((iev_main = malloc(sizeof(struct imsgev))) == NULL((void *)0)) |
| 227 | fatal(NULL((void *)0)); |
| 228 | imsg_init(&iev_main->ibuf, 3); |
| 229 | iev_main->handler = frontend_dispatch_main; |
| 230 | iev_main->events = EV_READ0x02; |
| 231 | event_set(&iev_main->ev, iev_main->ibuf.fd, iev_main->events, |
| 232 | iev_main->handler, iev_main); |
| 233 | event_add(&iev_main->ev, NULL((void *)0)); |
| 234 | |
| 235 | if (inet_pton(AF_INET624, "ff02::2", |
| 236 | &all_routers.ipv6mr_multiaddr.s6_addr__u6_addr.__u6_addr8) == -1) |
| 237 | fatal("inet_pton"); |
| 238 | |
| 239 | sndcmsgbuflen = CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) )) + |
| 240 | CMSG_SPACE(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(int)) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 241 | if ((sndcmsgbuf = malloc(sndcmsgbuflen)) == NULL((void *)0)) |
| 242 | fatal("%s", __func__); |
| 243 | |
| 244 | sndmhdr.msg_namelen = sizeof(struct sockaddr_in6); |
| 245 | sndmhdr.msg_iov = sndiov; |
| 246 | sndmhdr.msg_iovlen = 1; |
| 247 | sndmhdr.msg_control = sndcmsgbuf; |
| 248 | sndmhdr.msg_controllen = sndcmsgbuflen; |
| 249 | |
| 250 | TAILQ_INIT(&ra_interfaces)do { (&ra_interfaces)->tqh_first = ((void *)0); (& ra_interfaces)->tqh_last = &(&ra_interfaces)->tqh_first ; } while (0); |
| 251 | |
| 252 | event_dispatch(); |
| 253 | |
| 254 | frontend_shutdown(); |
| 255 | } |
| 256 | |
| 257 | __dead__attribute__((__noreturn__)) void |
| 258 | frontend_shutdown(void) |
| 259 | { |
| 260 | /* Close pipes. */ |
| 261 | msgbuf_write(&iev_engine->ibuf.w); |
| 262 | msgbuf_clear(&iev_engine->ibuf.w); |
| 263 | close(iev_engine->ibuf.fd); |
| 264 | msgbuf_write(&iev_main->ibuf.w); |
| 265 | msgbuf_clear(&iev_main->ibuf.w); |
| 266 | close(iev_main->ibuf.fd); |
| 267 | |
| 268 | config_clear(frontend_conf); |
| 269 | |
| 270 | free(iev_engine); |
| 271 | free(iev_main); |
| 272 | |
| 273 | log_info("frontend exiting"); |
| 274 | exit(0); |
| 275 | } |
| 276 | |
| 277 | int |
| 278 | frontend_imsg_compose_main(int type, pid_t pid, void *data, uint16_t datalen) |
| 279 | { |
| 280 | return (imsg_compose_event(iev_main, type, 0, pid, -1, data, |
| 281 | datalen)); |
| 282 | } |
| 283 | |
| 284 | int |
| 285 | frontend_imsg_compose_engine(int type, pid_t pid, void *data, uint16_t datalen) |
| 286 | { |
| 287 | return (imsg_compose_event(iev_engine, type, 0, pid, -1, data, |
| 288 | datalen)); |
| 289 | } |
| 290 | |
| 291 | void |
| 292 | frontend_dispatch_main(int fd, short event, void *bula) |
| 293 | { |
| 294 | static struct rad_conf *nconf; |
| 295 | static struct ra_iface_conf *ra_iface_conf; |
| 296 | static struct ra_options_conf *ra_options; |
| 297 | struct imsg imsg; |
| 298 | struct imsgev *iev = bula; |
| 299 | struct imsgbuf *ibuf = &iev->ibuf; |
| 300 | struct ra_prefix_conf *ra_prefix_conf; |
| 301 | struct ra_rdnss_conf *ra_rdnss_conf; |
| 302 | struct ra_dnssl_conf *ra_dnssl_conf; |
| 303 | int n, shut = 0, icmp6sock, rdomain; |
| 304 | |
| 305 | if (event & EV_READ0x02) { |
| 306 | if ((n = imsg_read(ibuf)) == -1 && errno(*__errno()) != EAGAIN35) |
| 307 | fatal("imsg_read error"); |
| 308 | if (n == 0) /* Connection closed. */ |
| 309 | shut = 1; |
| 310 | } |
| 311 | if (event & EV_WRITE0x04) { |
| 312 | if ((n = msgbuf_write(&ibuf->w)) == -1 && errno(*__errno()) != EAGAIN35) |
| 313 | fatal("msgbuf_write"); |
| 314 | if (n == 0) /* Connection closed. */ |
| 315 | shut = 1; |
| 316 | } |
| 317 | |
| 318 | for (;;) { |
| 319 | if ((n = imsg_get(ibuf, &imsg)) == -1) |
| 320 | fatal("%s: imsg_get error", __func__); |
| 321 | if (n == 0) /* No more messages. */ |
| 322 | break; |
| 323 | |
| 324 | switch (imsg.hdr.type) { |
| 325 | case IMSG_SOCKET_IPC: |
| 326 | /* |
| 327 | * Setup pipe and event handler to the engine |
| 328 | * process. |
| 329 | */ |
| 330 | if (iev_engine) |
| 331 | fatalx("%s: received unexpected imsg fd to " |
| 332 | "frontend", __func__); |
| 333 | if ((fd = imsg.fd) == -1) |
| 334 | fatalx("%s: expected to receive imsg fd to " |
| 335 | "frontend but didn't receive any", |
| 336 | __func__); |
| 337 | |
| 338 | iev_engine = malloc(sizeof(struct imsgev)); |
| 339 | if (iev_engine == NULL((void *)0)) |
| 340 | fatal(NULL((void *)0)); |
| 341 | |
| 342 | imsg_init(&iev_engine->ibuf, fd); |
| 343 | iev_engine->handler = frontend_dispatch_engine; |
| 344 | iev_engine->events = EV_READ0x02; |
| 345 | |
| 346 | event_set(&iev_engine->ev, iev_engine->ibuf.fd, |
| 347 | iev_engine->events, iev_engine->handler, iev_engine); |
| 348 | event_add(&iev_engine->ev, NULL((void *)0)); |
| 349 | break; |
| 350 | case IMSG_RECONF_CONF: |
| 351 | if (nconf != NULL((void *)0)) |
| 352 | fatalx("%s: IMSG_RECONF_CONF already in " |
| 353 | "progress", __func__); |
| 354 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(struct rad_conf)) |
| 355 | fatalx("%s: IMSG_RECONF_CONF wrong length: %lu", |
| 356 | __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 357 | if ((nconf = malloc(sizeof(struct rad_conf))) == |
| 358 | NULL((void *)0)) |
| 359 | fatal(NULL((void *)0)); |
| 360 | memcpy(nconf, imsg.data, sizeof(struct rad_conf)); |
| 361 | SIMPLEQ_INIT(&nconf->ra_iface_list)do { (&nconf->ra_iface_list)->sqh_first = ((void *) 0); (&nconf->ra_iface_list)->sqh_last = &(& nconf->ra_iface_list)->sqh_first; } while (0); |
| 362 | SIMPLEQ_INIT(&nconf->ra_options.ra_rdnss_list)do { (&nconf->ra_options.ra_rdnss_list)->sqh_first = ((void *)0); (&nconf->ra_options.ra_rdnss_list)->sqh_last = &(&nconf->ra_options.ra_rdnss_list)->sqh_first ; } while (0); |
| 363 | SIMPLEQ_INIT(&nconf->ra_options.ra_dnssl_list)do { (&nconf->ra_options.ra_dnssl_list)->sqh_first = ((void *)0); (&nconf->ra_options.ra_dnssl_list)->sqh_last = &(&nconf->ra_options.ra_dnssl_list)->sqh_first ; } while (0); |
| 364 | ra_options = &nconf->ra_options; |
| 365 | break; |
| 366 | case IMSG_RECONF_RA_IFACE: |
| 367 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(struct |
| 368 | ra_iface_conf)) |
| 369 | fatalx("%s: IMSG_RECONF_RA_IFACE wrong length: " |
| 370 | "%lu", __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 371 | if ((ra_iface_conf = malloc(sizeof(struct |
| 372 | ra_iface_conf))) == NULL((void *)0)) |
| 373 | fatal(NULL((void *)0)); |
| 374 | memcpy(ra_iface_conf, imsg.data, sizeof(struct |
| 375 | ra_iface_conf)); |
| 376 | ra_iface_conf->autoprefix = NULL((void *)0); |
| 377 | SIMPLEQ_INIT(&ra_iface_conf->ra_prefix_list)do { (&ra_iface_conf->ra_prefix_list)->sqh_first = ( (void *)0); (&ra_iface_conf->ra_prefix_list)->sqh_last = &(&ra_iface_conf->ra_prefix_list)->sqh_first ; } while (0); |
| 378 | SIMPLEQ_INIT(&ra_iface_conf->ra_options.ra_rdnss_list)do { (&ra_iface_conf->ra_options.ra_rdnss_list)->sqh_first = ((void *)0); (&ra_iface_conf->ra_options.ra_rdnss_list )->sqh_last = &(&ra_iface_conf->ra_options.ra_rdnss_list )->sqh_first; } while (0); |
| 379 | SIMPLEQ_INIT(&ra_iface_conf->ra_options.ra_dnssl_list)do { (&ra_iface_conf->ra_options.ra_dnssl_list)->sqh_first = ((void *)0); (&ra_iface_conf->ra_options.ra_dnssl_list )->sqh_last = &(&ra_iface_conf->ra_options.ra_dnssl_list )->sqh_first; } while (0); |
| 380 | SIMPLEQ_INSERT_TAIL(&nconf->ra_iface_list,do { (ra_iface_conf)->entry.sqe_next = ((void *)0); *(& nconf->ra_iface_list)->sqh_last = (ra_iface_conf); (& nconf->ra_iface_list)->sqh_last = &(ra_iface_conf)-> entry.sqe_next; } while (0) |
| 381 | ra_iface_conf, entry)do { (ra_iface_conf)->entry.sqe_next = ((void *)0); *(& nconf->ra_iface_list)->sqh_last = (ra_iface_conf); (& nconf->ra_iface_list)->sqh_last = &(ra_iface_conf)-> entry.sqe_next; } while (0); |
| 382 | ra_options = &ra_iface_conf->ra_options; |
| 383 | break; |
| 384 | case IMSG_RECONF_RA_AUTOPREFIX: |
| 385 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(struct |
| 386 | ra_prefix_conf)) |
| 387 | fatalx("%s: IMSG_RECONF_RA_AUTOPREFIX wrong " |
| 388 | "length: %lu", __func__, |
| 389 | IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 390 | if ((ra_iface_conf->autoprefix = malloc(sizeof(struct |
| 391 | ra_prefix_conf))) == NULL((void *)0)) |
| 392 | fatal(NULL((void *)0)); |
| 393 | memcpy(ra_iface_conf->autoprefix, imsg.data, |
| 394 | sizeof(struct ra_prefix_conf)); |
| 395 | break; |
| 396 | case IMSG_RECONF_RA_PREFIX: |
| 397 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(struct |
| 398 | ra_prefix_conf)) |
| 399 | fatalx("%s: IMSG_RECONF_RA_PREFIX wrong " |
| 400 | "length: %lu", __func__, |
| 401 | IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 402 | if ((ra_prefix_conf = malloc(sizeof(struct |
| 403 | ra_prefix_conf))) == NULL((void *)0)) |
| 404 | fatal(NULL((void *)0)); |
| 405 | memcpy(ra_prefix_conf, imsg.data, |
| 406 | sizeof(struct ra_prefix_conf)); |
| 407 | SIMPLEQ_INSERT_TAIL(&ra_iface_conf->ra_prefix_list,do { (ra_prefix_conf)->entry.sqe_next = ((void *)0); *(& ra_iface_conf->ra_prefix_list)->sqh_last = (ra_prefix_conf ); (&ra_iface_conf->ra_prefix_list)->sqh_last = & (ra_prefix_conf)->entry.sqe_next; } while (0) |
| 408 | ra_prefix_conf, entry)do { (ra_prefix_conf)->entry.sqe_next = ((void *)0); *(& ra_iface_conf->ra_prefix_list)->sqh_last = (ra_prefix_conf ); (&ra_iface_conf->ra_prefix_list)->sqh_last = & (ra_prefix_conf)->entry.sqe_next; } while (0); |
| 409 | break; |
| 410 | case IMSG_RECONF_RA_RDNSS: |
| 411 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(struct |
| 412 | ra_rdnss_conf)) |
| 413 | fatalx("%s: IMSG_RECONF_RA_RDNSS wrong length: " |
| 414 | "%lu", __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 415 | if ((ra_rdnss_conf = malloc(sizeof(struct |
| 416 | ra_rdnss_conf))) == NULL((void *)0)) |
| 417 | fatal(NULL((void *)0)); |
| 418 | memcpy(ra_rdnss_conf, imsg.data, sizeof(struct |
| 419 | ra_rdnss_conf)); |
| 420 | SIMPLEQ_INSERT_TAIL(&ra_options->ra_rdnss_list,do { (ra_rdnss_conf)->entry.sqe_next = ((void *)0); *(& ra_options->ra_rdnss_list)->sqh_last = (ra_rdnss_conf); (&ra_options->ra_rdnss_list)->sqh_last = &(ra_rdnss_conf )->entry.sqe_next; } while (0) |
| 421 | ra_rdnss_conf, entry)do { (ra_rdnss_conf)->entry.sqe_next = ((void *)0); *(& ra_options->ra_rdnss_list)->sqh_last = (ra_rdnss_conf); (&ra_options->ra_rdnss_list)->sqh_last = &(ra_rdnss_conf )->entry.sqe_next; } while (0); |
| 422 | break; |
| 423 | case IMSG_RECONF_RA_DNSSL: |
| 424 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(struct |
| 425 | ra_dnssl_conf)) |
| 426 | fatalx("%s: IMSG_RECONF_RA_DNSSL wrong length: " |
| 427 | "%lu", __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 428 | if ((ra_dnssl_conf = malloc(sizeof(struct |
| 429 | ra_dnssl_conf))) == NULL((void *)0)) |
| 430 | fatal(NULL((void *)0)); |
| 431 | memcpy(ra_dnssl_conf, imsg.data, sizeof(struct |
| 432 | ra_dnssl_conf)); |
| 433 | SIMPLEQ_INSERT_TAIL(&ra_options->ra_dnssl_list,do { (ra_dnssl_conf)->entry.sqe_next = ((void *)0); *(& ra_options->ra_dnssl_list)->sqh_last = (ra_dnssl_conf); (&ra_options->ra_dnssl_list)->sqh_last = &(ra_dnssl_conf )->entry.sqe_next; } while (0) |
| 434 | ra_dnssl_conf, entry)do { (ra_dnssl_conf)->entry.sqe_next = ((void *)0); *(& ra_options->ra_dnssl_list)->sqh_last = (ra_dnssl_conf); (&ra_options->ra_dnssl_list)->sqh_last = &(ra_dnssl_conf )->entry.sqe_next; } while (0); |
| 435 | break; |
| 436 | case IMSG_RECONF_END: |
| 437 | if (nconf == NULL((void *)0)) |
| 438 | fatalx("%s: IMSG_RECONF_END without " |
| 439 | "IMSG_RECONF_CONF", __func__); |
| 440 | merge_config(frontend_conf, nconf); |
| 441 | merge_ra_interfaces(); |
| 442 | nconf = NULL((void *)0); |
| 443 | break; |
| 444 | case IMSG_ICMP6SOCK: |
| 445 | if ((icmp6sock = imsg.fd) == -1) |
| 446 | fatalx("%s: expected to receive imsg " |
| 447 | "ICMPv6 fd but didn't receive any", |
| 448 | __func__); |
| 449 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(rdomain)) |
| 450 | fatalx("%s: IMSG_ICMP6SOCK wrong length: " |
| 451 | "%lu", __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 452 | memcpy(&rdomain, imsg.data, sizeof(rdomain)); |
| 453 | set_icmp6sock(icmp6sock, rdomain); |
| 454 | break; |
| 455 | case IMSG_ROUTESOCK: |
| 456 | if (routesock != -1) |
| 457 | fatalx("%s: received unexpected routesock fd", |
| 458 | __func__); |
| 459 | if ((routesock = imsg.fd) == -1) |
| 460 | fatalx("%s: expected to receive imsg " |
| 461 | "routesocket fd but didn't receive any", |
| 462 | __func__); |
| 463 | event_set(&ev_route, routesock, EV_READ0x02 | EV_PERSIST0x10, |
| 464 | route_receive, NULL((void *)0)); |
| 465 | break; |
| 466 | case IMSG_STARTUP: |
| 467 | frontend_startup(); |
| 468 | break; |
| 469 | case IMSG_CONTROLFD: |
| 470 | if ((fd = imsg.fd) == -1) |
| 471 | fatalx("%s: expected to receive imsg " |
| 472 | "control fd but didn't receive any", |
| 473 | __func__); |
| 474 | /* Listen on control socket. */ |
| 475 | control_listen(fd); |
| 476 | break; |
| 477 | default: |
| 478 | log_debug("%s: error handling imsg %d", __func__, |
| 479 | imsg.hdr.type); |
| 480 | break; |
| 481 | } |
| 482 | imsg_free(&imsg); |
| 483 | } |
| 484 | if (!shut) |
| 485 | imsg_event_add(iev); |
| 486 | else { |
| 487 | /* This pipe is dead. Remove its event handler. */ |
| 488 | event_del(&iev->ev); |
| 489 | event_loopexit(NULL((void *)0)); |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | void |
| 494 | frontend_dispatch_engine(int fd, short event, void *bula) |
| 495 | { |
| 496 | struct imsgev *iev = bula; |
| 497 | struct imsgbuf *ibuf = &iev->ibuf; |
| 498 | struct imsg imsg; |
| 499 | struct imsg_send_ra send_ra; |
| 500 | struct ra_iface *ra_iface; |
| 501 | uint32_t if_index; |
| 502 | int n, shut = 0; |
| 503 | |
| 504 | if (event & EV_READ0x02) { |
| 505 | if ((n = imsg_read(ibuf)) == -1 && errno(*__errno()) != EAGAIN35) |
| 506 | fatal("imsg_read error"); |
| 507 | if (n == 0) /* Connection closed. */ |
| 508 | shut = 1; |
| 509 | } |
| 510 | if (event & EV_WRITE0x04) { |
| 511 | if ((n = msgbuf_write(&ibuf->w)) == -1 && errno(*__errno()) != EAGAIN35) |
| 512 | fatal("msgbuf_write"); |
| 513 | if (n == 0) /* Connection closed. */ |
| 514 | shut = 1; |
| 515 | } |
| 516 | |
| 517 | for (;;) { |
| 518 | if ((n = imsg_get(ibuf, &imsg)) == -1) |
| 519 | fatal("%s: imsg_get error", __func__); |
| 520 | if (n == 0) /* No more messages. */ |
| 521 | break; |
| 522 | |
| 523 | switch (imsg.hdr.type) { |
| 524 | case IMSG_SEND_RA: |
| 525 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(send_ra)) |
| 526 | fatalx("%s: IMSG_SEND_RA wrong length: %lu", |
| 527 | __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 528 | memcpy(&send_ra, imsg.data, sizeof(send_ra)); |
| 529 | ra_iface = find_ra_iface_by_id(send_ra.if_index); |
| 530 | if (ra_iface) |
| 531 | ra_output(ra_iface, &send_ra.to); |
| 532 | break; |
| 533 | case IMSG_REMOVE_IF: |
| 534 | if (IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr)) != sizeof(if_index)) |
| 535 | fatalx("%s: IMSG_REMOVE_IF wrong length: %lu", |
| 536 | __func__, IMSG_DATA_SIZE(imsg)((imsg).hdr.len - sizeof(struct imsg_hdr))); |
| 537 | memcpy(&if_index, imsg.data, sizeof(if_index)); |
| 538 | ra_iface = find_ra_iface_by_id(if_index); |
| 539 | if (ra_iface) { |
| 540 | TAILQ_REMOVE(&ra_interfaces, ra_iface, entry)do { if (((ra_iface)->entry.tqe_next) != ((void *)0)) (ra_iface )->entry.tqe_next->entry.tqe_prev = (ra_iface)->entry .tqe_prev; else (&ra_interfaces)->tqh_last = (ra_iface )->entry.tqe_prev; *(ra_iface)->entry.tqe_prev = (ra_iface )->entry.tqe_next; ; ; } while (0); |
| 541 | free_ra_iface(ra_iface); |
| 542 | } |
| 543 | break; |
| 544 | default: |
| 545 | log_debug("%s: error handling imsg %d", __func__, |
| 546 | imsg.hdr.type); |
| 547 | break; |
| 548 | } |
| 549 | imsg_free(&imsg); |
| 550 | } |
| 551 | if (!shut) |
| 552 | imsg_event_add(iev); |
| 553 | else { |
| 554 | /* This pipe is dead. Remove its event handler. */ |
| 555 | event_del(&iev->ev); |
| 556 | event_loopexit(NULL((void *)0)); |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | void |
| 561 | frontend_startup(void) |
| 562 | { |
| 563 | if (!event_initialized(&ev_route)((&ev_route)->ev_flags & 0x80)) |
| 564 | fatalx("%s: did not receive a route socket from the main " |
| 565 | "process", __func__); |
| 566 | |
| 567 | event_add(&ev_route, NULL((void *)0)); |
| 568 | } |
| 569 | |
| 570 | |
| 571 | void |
| 572 | icmp6_receive(int fd, short events, void *arg) |
| 573 | { |
| 574 | struct icmp6_ev *icmp6ev; |
| 575 | struct icmp6_hdr *icmp6_hdr; |
| 576 | struct imsg_ra_rs ra_rs; |
| 577 | struct in6_pktinfo *pi = NULL((void *)0); |
| 578 | struct cmsghdr *cm; |
| 579 | ssize_t len; |
| 580 | int if_index = 0, *hlimp = NULL((void *)0); |
| 581 | char ntopbuf[INET6_ADDRSTRLEN46], ifnamebuf[IFNAMSIZ16]; |
| 582 | |
| 583 | icmp6ev = arg; |
| 584 | if ((len = recvmsg(fd, &icmp6ev->rcvmhdr, 0)) == -1) { |
| 585 | log_warn("recvmsg"); |
| 586 | return; |
| 587 | } |
| 588 | |
| 589 | if ((size_t)len < sizeof(struct icmp6_hdr)) |
| 590 | return; |
| 591 | |
| 592 | icmp6_hdr = (struct icmp6_hdr *)icmp6ev->answer; |
| 593 | if (icmp6_hdr->icmp6_type != ND_ROUTER_ADVERT134 && |
| 594 | icmp6_hdr->icmp6_type != ND_ROUTER_SOLICIT133) |
| 595 | return; |
| 596 | |
| 597 | /* extract optional information via Advanced API */ |
| 598 | for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&icmp6ev->rcvmhdr)((&icmp6ev->rcvmhdr)->msg_controllen >= sizeof(struct cmsghdr) ? (struct cmsghdr *)(&icmp6ev->rcvmhdr)-> msg_control : (struct cmsghdr *)((void *)0)); cm; |
| 599 | cm = (struct cmsghdr *)CMSG_NXTHDR(&icmp6ev->rcvmhdr, cm)(((char *)(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof (long) - 1)) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof (struct cmsghdr)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)) > ((char *)(&icmp6ev->rcvmhdr)->msg_control ) + (&icmp6ev->rcvmhdr)->msg_controllen) ? (struct cmsghdr *)((void *)0) : (struct cmsghdr *)((char *)(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof(long) - 1)) &~(sizeof (long) - 1))))) { |
| 600 | if (cm->cmsg_level == IPPROTO_IPV641 && |
| 601 | cm->cmsg_type == IPV6_PKTINFO46 && |
| 602 | cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(struct in6_pktinfo)))) { |
| 603 | pi = (struct in6_pktinfo *)(CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))); |
| 604 | if_index = pi->ipi6_ifindex; |
| 605 | } |
| 606 | if (cm->cmsg_level == IPPROTO_IPV641 && |
| 607 | cm->cmsg_type == IPV6_HOPLIMIT47 && |
| 608 | cm->cmsg_len == CMSG_LEN(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(int)))) |
| 609 | hlimp = (int *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 610 | } |
| 611 | |
| 612 | if (if_index == 0) { |
| 613 | log_warnx("failed to get receiving interface"); |
| 614 | return; |
| 615 | } |
| 616 | |
| 617 | if (hlimp == NULL((void *)0)) { |
| 618 | log_warnx("failed to get receiving hop limit"); |
| 619 | return; |
| 620 | } |
| 621 | |
| 622 | if (*hlimp != 255) { |
| 623 | log_warnx("invalid RA or RS with hop limit of %d from %s on %s", |
| 624 | *hlimp, inet_ntop(AF_INET624, &icmp6ev->from.sin6_addr, |
| 625 | ntopbuf, INET6_ADDRSTRLEN46), if_indextoname(if_index, |
| 626 | ifnamebuf)); |
| 627 | return; |
| 628 | } |
| 629 | |
| 630 | log_debug("RA or RS with hop limit of %d from %s on %s", |
| 631 | *hlimp, inet_ntop(AF_INET624, &icmp6ev->from.sin6_addr, |
| 632 | ntopbuf, INET6_ADDRSTRLEN46), if_indextoname(if_index, |
| 633 | ifnamebuf)); |
| 634 | |
| 635 | if ((size_t)len > sizeof(ra_rs.packet)) { |
| 636 | log_warnx("invalid RA or RS with size %ld from %s on %s", |
| 637 | len, inet_ntop(AF_INET624, &icmp6ev->from.sin6_addr, |
| 638 | ntopbuf, INET6_ADDRSTRLEN46), if_indextoname(if_index, |
| 639 | ifnamebuf)); |
| 640 | return; |
| 641 | } |
| 642 | |
| 643 | ra_rs.if_index = if_index; |
| 644 | memcpy(&ra_rs.from, &icmp6ev->from, sizeof(ra_rs.from)); |
| 645 | ra_rs.len = len; |
| 646 | memcpy(ra_rs.packet, icmp6ev->answer, len); |
| 647 | |
| 648 | frontend_imsg_compose_engine(IMSG_RA_RS, 0, &ra_rs, sizeof(ra_rs)); |
| 649 | } |
| 650 | |
| 651 | void |
| 652 | join_all_routers_mcast_group(struct ra_iface *ra_iface) |
| 653 | { |
| 654 | if (!event_initialized(&ra_iface->icmp6ev->ev)((&ra_iface->icmp6ev->ev)->ev_flags & 0x80)) |
| 655 | return; |
| 656 | log_debug("joining multicast group on %s", ra_iface->name); |
| 657 | all_routers.ipv6mr_interface = ra_iface->if_index; |
| 658 | if (setsockopt(EVENT_FD(&ra_iface->icmp6ev->ev)(int)(&ra_iface->icmp6ev->ev)->ev_fd, IPPROTO_IPV641, |
| 659 | IPV6_JOIN_GROUP12, &all_routers, sizeof(all_routers)) == -1) |
| 660 | fatal("IPV6_JOIN_GROUP(%s)", ra_iface->name); |
| 661 | } |
| 662 | |
| 663 | void |
| 664 | leave_all_routers_mcast_group(struct ra_iface *ra_iface) |
| 665 | { |
| 666 | if (!event_initialized(&ra_iface->icmp6ev->ev)((&ra_iface->icmp6ev->ev)->ev_flags & 0x80)) |
| 667 | return; |
| 668 | log_debug("leaving multicast group on %s", ra_iface->name); |
| 669 | all_routers.ipv6mr_interface = ra_iface->if_index; |
| 670 | setsockopt(EVENT_FD(&ra_iface->icmp6ev->ev)(int)(&ra_iface->icmp6ev->ev)->ev_fd, IPPROTO_IPV641, |
| 671 | IPV6_LEAVE_GROUP13, &all_routers, sizeof(all_routers)); |
| 672 | } |
| 673 | |
| 674 | struct ra_iface* |
| 675 | find_ra_iface_by_id(uint32_t if_index) |
| 676 | { |
| 677 | struct ra_iface *ra_iface; |
| 678 | |
| 679 | TAILQ_FOREACH(ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) { |
| 680 | if (ra_iface->if_index == if_index) |
| 681 | return ra_iface; |
| 682 | } |
| 683 | return (NULL((void *)0)); |
| 684 | } |
| 685 | |
| 686 | struct ra_iface* |
| 687 | find_ra_iface_by_name(char *if_name) |
| 688 | { |
| 689 | struct ra_iface *ra_iface; |
| 690 | |
| 691 | TAILQ_FOREACH(ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) { |
| 692 | if (strcmp(ra_iface->name, if_name) == 0) |
| 693 | return ra_iface; |
| 694 | } |
| 695 | return (NULL((void *)0)); |
| 696 | } |
| 697 | |
| 698 | struct ra_iface_conf* |
| 699 | find_ra_iface_conf(struct ra_iface_conf_head *head, char *if_name) |
| 700 | { |
| 701 | struct ra_iface_conf *ra_iface_conf; |
| 702 | |
| 703 | SIMPLEQ_FOREACH(ra_iface_conf, head, entry)for((ra_iface_conf) = ((head)->sqh_first); (ra_iface_conf) != ((void *)0); (ra_iface_conf) = ((ra_iface_conf)->entry .sqe_next)) { |
| 704 | if (strcmp(ra_iface_conf->name, if_name) == 0) |
| 705 | return ra_iface_conf; |
| 706 | } |
| 707 | return (NULL((void *)0)); |
| 708 | } |
| 709 | |
| 710 | int |
| 711 | get_link_state(char *if_name) |
| 712 | { |
| 713 | struct ifaddrs *ifap, *ifa; |
| 714 | int ls = LINK_STATE_UNKNOWN0; |
| 715 | |
| 716 | if (getifaddrs(&ifap) != 0) { |
| 717 | log_warn("getifaddrs"); |
| 718 | return LINK_STATE_UNKNOWN0; |
| 719 | } |
| 720 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
| 721 | if (ifa->ifa_addr == NULL((void *)0) || |
| 722 | ifa->ifa_addr->sa_family != AF_LINK18) |
| 723 | continue; |
| 724 | if (strcmp(if_name, ifa->ifa_name) != 0) |
| 725 | continue; |
| 726 | |
| 727 | ls = ((struct if_data*)ifa->ifa_data)->ifi_link_state; |
| 728 | break; |
| 729 | } |
| 730 | freeifaddrs(ifap); |
| 731 | return ls; |
| 732 | } |
| 733 | |
| 734 | int |
| 735 | get_ifrdomain(char *if_name) |
| 736 | { |
| 737 | struct ifreq ifr; |
| 738 | |
| 739 | strlcpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name)); |
| 740 | if (ioctl(ioctlsock, SIOCGIFRDOMAIN(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((160))), (caddr_t)&ifr) == -1) { |
| 741 | log_warn("SIOCGIFRDOMAIN"); |
| 742 | return -1; |
| 743 | } |
| 744 | return ifr.ifr_rdomainidifr_ifru.ifru_metric; |
| 745 | } |
| 746 | |
| 747 | void |
| 748 | merge_ra_interface(char *name, char *conf_name) |
| 749 | { |
| 750 | struct ra_iface *ra_iface; |
| 751 | uint32_t if_index; |
| 752 | int link_state, has_linklocal, ifrdomain; |
| 753 | |
| 754 | link_state = get_link_state(name); |
| 755 | has_linklocal = interface_has_linklocal_address(name); |
| 756 | ifrdomain = get_ifrdomain(name); |
| 757 | |
| 758 | if ((ra_iface = find_ra_iface_by_name(name)) != NULL((void *)0)) { |
| 759 | ra_iface->link_state = link_state; |
| 760 | if (!LINK_STATE_IS_UP(link_state)((link_state) >= 4 || (link_state) == 0)) { |
| 761 | log_debug("%s down, removing", name); |
| 762 | ra_iface->removed = 1; |
| 763 | } else if (!has_linklocal) { |
| 764 | log_debug("%s has no IPv6 link-local address, " |
| 765 | "removing", name); |
| 766 | ra_iface->removed = 1; |
| 767 | } else if (ifrdomain == -1) { |
| 768 | log_debug("can't get rdomain for %s, removing", name); |
| 769 | ra_iface->removed = 1; |
| 770 | } else if (ra_iface->rdomain != ifrdomain) { |
| 771 | leave_all_routers_mcast_group(ra_iface); |
| 772 | unref_icmp6ev(ra_iface); |
| 773 | ra_iface->rdomain = ifrdomain; |
| 774 | ra_iface->icmp6ev = get_icmp6ev_by_rdomain(ifrdomain); |
| 775 | join_all_routers_mcast_group(ra_iface); |
| 776 | ra_iface->removed = 0; |
| 777 | } else { |
| 778 | log_debug("keeping interface %s", name); |
| 779 | ra_iface->removed = 0; |
| 780 | } |
| 781 | return; |
| 782 | } |
| 783 | |
| 784 | if (!LINK_STATE_IS_UP(link_state)((link_state) >= 4 || (link_state) == 0)) { |
| 785 | log_debug("%s down, ignoring", name); |
| 786 | return; |
| 787 | } |
| 788 | |
| 789 | if (!has_linklocal) { |
| 790 | log_debug("%s has no IPv6 link-local address, ignoring", name); |
| 791 | return; |
| 792 | } |
| 793 | |
| 794 | log_debug("new interface %s", name); |
| 795 | if ((if_index = if_nametoindex(name)) == 0) |
| 796 | return; |
| 797 | |
| 798 | log_debug("adding interface %s", name); |
| 799 | if ((ra_iface = calloc(1, sizeof(*ra_iface))) == NULL((void *)0)) |
| 800 | fatal("%s", __func__); |
| 801 | |
| 802 | strlcpy(ra_iface->name, name, sizeof(ra_iface->name)); |
| 803 | strlcpy(ra_iface->conf_name, conf_name, |
| 804 | sizeof(ra_iface->conf_name)); |
| 805 | |
| 806 | ra_iface->if_index = if_index; |
| 807 | ra_iface->rdomain = ifrdomain; |
| 808 | |
| 809 | SIMPLEQ_INIT(&ra_iface->prefixes)do { (&ra_iface->prefixes)->sqh_first = ((void *)0) ; (&ra_iface->prefixes)->sqh_last = &(&ra_iface ->prefixes)->sqh_first; } while (0); |
| 810 | |
| 811 | ra_iface->icmp6ev = get_icmp6ev_by_rdomain(ifrdomain); |
| 812 | join_all_routers_mcast_group(ra_iface); |
| 813 | TAILQ_INSERT_TAIL(&ra_interfaces, ra_iface, entry)do { (ra_iface)->entry.tqe_next = ((void *)0); (ra_iface)-> entry.tqe_prev = (&ra_interfaces)->tqh_last; *(&ra_interfaces )->tqh_last = (ra_iface); (&ra_interfaces)->tqh_last = &(ra_iface)->entry.tqe_next; } while (0); |
| 814 | } |
| 815 | |
| 816 | void |
| 817 | merge_ra_interfaces(void) |
| 818 | { |
| 819 | struct ra_iface_conf *ra_iface_conf; |
| 820 | struct ra_prefix_conf *ra_prefix_conf; |
| 821 | struct ra_iface *ra_iface; |
| 822 | struct ifgroupreq ifgr; |
| 823 | struct ifg_req *ifg; |
| 824 | char *conf_name; |
| 825 | unsigned int len; |
| 826 | |
| 827 | TAILQ_FOREACH(ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) |
| 828 | ra_iface->removed = 1; |
| 829 | |
| 830 | SIMPLEQ_FOREACH(ra_iface_conf, &frontend_conf->ra_iface_list, entry)for((ra_iface_conf) = ((&frontend_conf->ra_iface_list) ->sqh_first); (ra_iface_conf) != ((void *)0); (ra_iface_conf ) = ((ra_iface_conf)->entry.sqe_next)) { |
| 831 | conf_name = ra_iface_conf->name; |
| 832 | |
| 833 | /* check if network interface or group */ |
| 834 | if (isdigit((unsigned char)conf_name[strlen(conf_name) - 1])) { |
| 835 | merge_ra_interface(conf_name, conf_name); |
| 836 | } else { |
| 837 | log_debug("interface group %s", conf_name); |
| 838 | |
| 839 | memset(&ifgr, 0, sizeof(ifgr)); |
| 840 | strlcpy(ifgr.ifgr_name, conf_name, |
| 841 | sizeof(ifgr.ifgr_name)); |
| 842 | if (ioctl(ioctlsock, SIOCGIFGMEMB(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifgroupreq) & 0x1fff) << 16) | ((('i')) << 8) | ((138))), |
| 843 | (caddr_t)&ifgr) == -1) |
| 844 | continue; |
| 845 | |
| 846 | len = ifgr.ifgr_len; |
| 847 | if ((ifgr.ifgr_groupsifgr_ifgru.ifgru_groups = calloc(1, len)) == NULL((void *)0)) |
| 848 | fatal("%s: calloc", __func__); |
| 849 | if (ioctl(ioctlsock, SIOCGIFGMEMB(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifgroupreq) & 0x1fff) << 16) | ((('i')) << 8) | ((138))), |
| 850 | (caddr_t)&ifgr) == -1) { |
| 851 | log_debug("group %s without members", |
| 852 | conf_name); |
| 853 | free(ifgr.ifgr_groupsifgr_ifgru.ifgru_groups); |
| 854 | continue; |
| 855 | } |
| 856 | |
| 857 | for (ifg = ifgr.ifgr_groupsifgr_ifgru.ifgru_groups; |
| 858 | (ifg != NULL((void *)0)) && (len >= sizeof(struct ifg_req)); |
| 859 | ifg++) { |
| 860 | len -= sizeof(struct ifg_req); |
| 861 | merge_ra_interface(ifg->ifgrq_memberifgrq_ifgrqu.ifgrqu_member, |
| 862 | conf_name); |
| 863 | } |
| 864 | free(ifgr.ifgr_groupsifgr_ifgru.ifgru_groups); |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | TAILQ_FOREACH(ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) { |
| 869 | while ((ra_prefix_conf = SIMPLEQ_FIRST(&ra_iface->prefixes)((&ra_iface->prefixes)->sqh_first)) |
| 870 | != NULL((void *)0)) { |
| 871 | SIMPLEQ_REMOVE_HEAD(&ra_iface->prefixes,do { if (((&ra_iface->prefixes)->sqh_first = (& ra_iface->prefixes)->sqh_first->entry.sqe_next) == ( (void *)0)) (&ra_iface->prefixes)->sqh_last = & (&ra_iface->prefixes)->sqh_first; } while (0) |
| 872 | entry)do { if (((&ra_iface->prefixes)->sqh_first = (& ra_iface->prefixes)->sqh_first->entry.sqe_next) == ( (void *)0)) (&ra_iface->prefixes)->sqh_last = & (&ra_iface->prefixes)->sqh_first; } while (0); |
| 873 | free(ra_prefix_conf); |
| 874 | } |
| 875 | ra_iface->prefix_count = 0; |
| 876 | |
| 877 | if (ra_iface->removed) { |
| 878 | log_debug("iface removed: %s", ra_iface->name); |
| 879 | build_leaving_packet(ra_iface); |
| 880 | frontend_imsg_compose_engine(IMSG_REMOVE_IF, 0, |
| 881 | &ra_iface->if_index, sizeof(ra_iface->if_index)); |
| 882 | continue; |
| 883 | } |
| 884 | |
| 885 | ra_iface_conf = find_ra_iface_conf( |
| 886 | &frontend_conf->ra_iface_list, ra_iface->conf_name); |
| 887 | |
| 888 | log_debug("add static prefixes for %s", ra_iface->name); |
| 889 | |
| 890 | SIMPLEQ_FOREACH(ra_prefix_conf, &ra_iface_conf->ra_prefix_list,for((ra_prefix_conf) = ((&ra_iface_conf->ra_prefix_list )->sqh_first); (ra_prefix_conf) != ((void *)0); (ra_prefix_conf ) = ((ra_prefix_conf)->entry.sqe_next)) |
| 891 | entry)for((ra_prefix_conf) = ((&ra_iface_conf->ra_prefix_list )->sqh_first); (ra_prefix_conf) != ((void *)0); (ra_prefix_conf ) = ((ra_prefix_conf)->entry.sqe_next)) { |
| 892 | add_new_prefix_to_ra_iface(ra_iface, |
| 893 | &ra_prefix_conf->prefix, |
| 894 | ra_prefix_conf->prefixlen, ra_prefix_conf); |
| 895 | } |
| 896 | |
| 897 | if (ra_iface_conf->autoprefix) |
| 898 | get_interface_prefixes(ra_iface, |
| 899 | ra_iface_conf->autoprefix); |
| 900 | |
| 901 | build_packet(ra_iface); |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | void |
| 906 | free_ra_iface(struct ra_iface *ra_iface) |
| 907 | { |
| 908 | struct ra_prefix_conf *prefix; |
| 909 | |
| 910 | leave_all_routers_mcast_group(ra_iface); |
| 911 | |
| 912 | while ((prefix = SIMPLEQ_FIRST(&ra_iface->prefixes)((&ra_iface->prefixes)->sqh_first)) != NULL((void *)0)) { |
| 913 | SIMPLEQ_REMOVE_HEAD(&ra_iface->prefixes, entry)do { if (((&ra_iface->prefixes)->sqh_first = (& ra_iface->prefixes)->sqh_first->entry.sqe_next) == ( (void *)0)) (&ra_iface->prefixes)->sqh_last = & (&ra_iface->prefixes)->sqh_first; } while (0); |
| 914 | free(prefix); |
| 915 | } |
| 916 | |
| 917 | unref_icmp6ev(ra_iface); |
| 918 | free(ra_iface); |
| 919 | } |
| 920 | |
| 921 | /* from kame via ifconfig, where it's called prefix() */ |
| 922 | int |
| 923 | in6_mask2prefixlen(struct in6_addr *in6) |
| 924 | { |
| 925 | u_char *nam = (u_char *)in6; |
| 926 | int byte, bit, plen = 0, size = sizeof(struct in6_addr); |
| 927 | |
| 928 | for (byte = 0; byte < size; byte++, plen += 8) |
| 929 | if (nam[byte] != 0xff) |
| 930 | break; |
| 931 | if (byte == size) |
| 932 | return (plen); |
| 933 | for (bit = 7; bit != 0; bit--, plen++) |
| 934 | if (!(nam[byte] & (1 << bit))) |
| 935 | break; |
| 936 | for (; bit != 0; bit--) |
| 937 | if (nam[byte] & (1 << bit)) |
| 938 | return (0); |
| 939 | byte++; |
| 940 | for (; byte < size; byte++) |
| 941 | if (nam[byte]) |
| 942 | return (0); |
| 943 | return (plen); |
| 944 | } |
| 945 | |
| 946 | int |
| 947 | interface_has_linklocal_address(char *name) |
| 948 | { |
| 949 | struct ifaddrs *ifap, *ifa; |
| 950 | struct sockaddr_in6 *sin6; |
| 951 | struct in6_ifreq ifr6; |
| 952 | int ret = 0; |
| 953 | |
| 954 | if (getifaddrs(&ifap) != 0) |
| 955 | fatal("getifaddrs"); |
| 956 | |
| 957 | for (ifa = ifap; ifa != NULL((void *)0); ifa = ifa->ifa_next) { |
| 958 | if (strcmp(name, ifa->ifa_name) != 0) |
| 959 | continue; |
| 960 | if (ifa->ifa_addr == NULL((void *)0) || |
| 961 | ifa->ifa_addr->sa_family != AF_INET624) |
| 962 | continue; |
| 963 | |
| 964 | sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; |
| 965 | |
| 966 | if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)(((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sin6->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) |
| 967 | continue; |
| 968 | |
| 969 | memset(&ifr6, 0, sizeof(ifr6)); |
| 970 | strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name)); |
| 971 | memcpy(&ifr6.ifr_addrifr_ifru.ifru_addr, sin6, sizeof(ifr6.ifr_addrifr_ifru.ifru_addr)); |
| 972 | if (ioctl(ioctlsock, SIOCGIFAFLAG_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct in6_ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((73))), (caddr_t)&ifr6) == -1) { |
| 973 | log_warn("SIOCGIFAFLAG_IN6"); |
| 974 | continue; |
| 975 | } |
| 976 | |
| 977 | if (ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_TENTATIVE0x02 | |
| 978 | IN6_IFF_DUPLICATED0x04)) |
| 979 | continue; |
| 980 | |
| 981 | ret = 1; |
| 982 | break; |
| 983 | } |
| 984 | freeifaddrs(ifap); |
| 985 | return (ret); |
| 986 | } |
| 987 | |
| 988 | void |
| 989 | get_interface_prefixes(struct ra_iface *ra_iface, struct ra_prefix_conf |
| 990 | *autoprefix) |
| 991 | { |
| 992 | struct in6_ifreq ifr6; |
| 993 | struct ifaddrs *ifap, *ifa; |
| 994 | struct sockaddr_in6 *sin6; |
| 995 | int prefixlen; |
| 996 | |
| 997 | log_debug("%s: %s", __func__, ra_iface->name); |
| 998 | |
| 999 | if (getifaddrs(&ifap) != 0) |
| 1000 | fatal("getifaddrs"); |
| 1001 | |
| 1002 | for (ifa = ifap; ifa != NULL((void *)0); ifa = ifa->ifa_next) { |
| 1003 | if (strcmp(ra_iface->name, ifa->ifa_name) != 0) |
| 1004 | continue; |
| 1005 | if (ifa->ifa_addr == NULL((void *)0) || |
| 1006 | ifa->ifa_addr->sa_family != AF_INET624) |
| 1007 | continue; |
| 1008 | |
| 1009 | sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; |
| 1010 | |
| 1011 | if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)(((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sin6->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) |
| 1012 | continue; |
| 1013 | |
| 1014 | memset(&ifr6, 0, sizeof(ifr6)); |
| 1015 | strlcpy(ifr6.ifr_name, ra_iface->name, sizeof(ifr6.ifr_name)); |
| 1016 | memcpy(&ifr6.ifr_addrifr_ifru.ifru_addr, sin6, sizeof(ifr6.ifr_addrifr_ifru.ifru_addr)); |
| 1017 | |
| 1018 | if (ioctl(ioctlsock, SIOCGIFNETMASK_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct in6_ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((37))), (caddr_t)&ifr6) == -1) |
| 1019 | continue; /* addr got deleted while we were looking */ |
| 1020 | |
| 1021 | prefixlen = in6_mask2prefixlen(&((struct sockaddr_in6 *) |
| 1022 | &ifr6.ifr_addrifr_ifru.ifru_addr)->sin6_addr); |
| 1023 | |
| 1024 | if (prefixlen == 128) |
| 1025 | continue; |
| 1026 | |
| 1027 | mask_prefix(&sin6->sin6_addr, prefixlen); |
| 1028 | |
| 1029 | add_new_prefix_to_ra_iface(ra_iface, &sin6->sin6_addr, |
| 1030 | prefixlen, autoprefix); |
| 1031 | } |
| 1032 | freeifaddrs(ifap); |
| 1033 | } |
| 1034 | |
| 1035 | struct ra_prefix_conf* |
| 1036 | find_ra_prefix_conf(struct ra_prefix_conf_head* head, struct in6_addr *prefix, |
| 1037 | int prefixlen) |
| 1038 | { |
| 1039 | struct ra_prefix_conf *ra_prefix_conf; |
| 1040 | |
| 1041 | SIMPLEQ_FOREACH(ra_prefix_conf, head, entry)for((ra_prefix_conf) = ((head)->sqh_first); (ra_prefix_conf ) != ((void *)0); (ra_prefix_conf) = ((ra_prefix_conf)->entry .sqe_next)) { |
| 1042 | if (ra_prefix_conf->prefixlen == prefixlen && |
| 1043 | memcmp(&ra_prefix_conf->prefix, prefix, sizeof(*prefix)) == |
| 1044 | 0) |
| 1045 | return (ra_prefix_conf); |
| 1046 | } |
| 1047 | return (NULL((void *)0)); |
| 1048 | } |
| 1049 | |
| 1050 | void |
| 1051 | add_new_prefix_to_ra_iface(struct ra_iface *ra_iface, struct in6_addr *addr, |
| 1052 | int prefixlen, struct ra_prefix_conf *ra_prefix_conf) |
| 1053 | { |
| 1054 | struct ra_prefix_conf *new_ra_prefix_conf; |
| 1055 | |
| 1056 | if (find_ra_prefix_conf(&ra_iface->prefixes, addr, prefixlen)) { |
| 1057 | log_debug("ignoring duplicate %s/%d prefix", |
| 1058 | in6_to_str(addr), prefixlen); |
| 1059 | return; |
| 1060 | } |
| 1061 | |
| 1062 | log_debug("adding %s/%d prefix", in6_to_str(addr), prefixlen); |
| 1063 | |
| 1064 | if ((new_ra_prefix_conf = calloc(1, sizeof(*ra_prefix_conf))) == NULL((void *)0)) |
| 1065 | fatal("%s", __func__); |
| 1066 | new_ra_prefix_conf->prefix = *addr; |
| 1067 | new_ra_prefix_conf->prefixlen = prefixlen; |
| 1068 | new_ra_prefix_conf->vltime = ra_prefix_conf->vltime; |
| 1069 | new_ra_prefix_conf->pltime = ra_prefix_conf->pltime; |
| 1070 | new_ra_prefix_conf->aflag = ra_prefix_conf->aflag; |
| 1071 | new_ra_prefix_conf->lflag = ra_prefix_conf->lflag; |
| 1072 | SIMPLEQ_INSERT_TAIL(&ra_iface->prefixes, new_ra_prefix_conf, entry)do { (new_ra_prefix_conf)->entry.sqe_next = ((void *)0); * (&ra_iface->prefixes)->sqh_last = (new_ra_prefix_conf ); (&ra_iface->prefixes)->sqh_last = &(new_ra_prefix_conf )->entry.sqe_next; } while (0); |
| 1073 | ra_iface->prefix_count++; |
| 1074 | } |
| 1075 | |
| 1076 | void |
| 1077 | build_packet(struct ra_iface *ra_iface) |
| 1078 | { |
| 1079 | struct nd_router_advert *ra; |
| 1080 | struct nd_opt_mtu *ndopt_mtu; |
| 1081 | struct nd_opt_prefix_info *ndopt_pi; |
| 1082 | struct ra_iface_conf *ra_iface_conf; |
| 1083 | struct ra_options_conf *ra_options_conf; |
| 1084 | struct ra_prefix_conf *ra_prefix_conf; |
| 1085 | struct nd_opt_rdnss *ndopt_rdnss; |
| 1086 | struct nd_opt_dnssl *ndopt_dnssl; |
| 1087 | struct ra_rdnss_conf *ra_rdnss; |
| 1088 | struct ra_dnssl_conf *ra_dnssl; |
| 1089 | size_t len, label_len; |
| 1090 | uint8_t *p, buf[RA_MAX_SIZE1500]; |
| 1091 | char *label_start, *label_end; |
| 1092 | |
| 1093 | ra_iface_conf = find_ra_iface_conf(&frontend_conf->ra_iface_list, |
| 1094 | ra_iface->conf_name); |
| 1095 | ra_options_conf = &ra_iface_conf->ra_options; |
| 1096 | |
| 1097 | len = sizeof(*ra); |
| 1098 | if (ra_options_conf->mtu > 0) |
| 1099 | len += sizeof(*ndopt_mtu); |
| 1100 | len += sizeof(*ndopt_pi) * ra_iface->prefix_count; |
| 1101 | if (ra_iface_conf->ra_options.rdnss_count > 0) |
| 1102 | len += sizeof(*ndopt_rdnss) + |
| 1103 | ra_iface_conf->ra_options.rdnss_count * |
| 1104 | sizeof(struct in6_addr); |
| 1105 | |
| 1106 | if (ra_iface_conf->ra_options.dnssl_len > 0) |
| 1107 | /* round up to 8 byte boundary */ |
| 1108 | len += sizeof(*ndopt_dnssl) + |
| 1109 | ((ra_iface_conf->ra_options.dnssl_len + 7) & ~7); |
| 1110 | |
| 1111 | if (len > sizeof(ra_iface->data)) |
| 1112 | fatalx("%s: packet too big", __func__); /* XXX send multiple */ |
| 1113 | |
| 1114 | p = buf; |
| 1115 | |
| 1116 | ra = (struct nd_router_advert *)p; |
| 1117 | |
| 1118 | memset(ra, 0, sizeof(*ra)); |
| 1119 | |
| 1120 | ra->nd_ra_typend_ra_hdr.icmp6_type = ND_ROUTER_ADVERT134; |
| 1121 | ra->nd_ra_curhoplimitnd_ra_hdr.icmp6_dataun.icmp6_un_data8[0] = ra_options_conf->cur_hl; |
| 1122 | if (ra_options_conf->m_flag) |
| 1123 | ra->nd_ra_flags_reservednd_ra_hdr.icmp6_dataun.icmp6_un_data8[1] |= ND_RA_FLAG_MANAGED0x80; |
| 1124 | if (ra_options_conf->o_flag) |
| 1125 | ra->nd_ra_flags_reservednd_ra_hdr.icmp6_dataun.icmp6_un_data8[1] |= ND_RA_FLAG_OTHER0x40; |
| 1126 | if (ra_iface->removed) |
| 1127 | /* tell clients that we are no longer a default router */ |
| 1128 | ra->nd_ra_router_lifetimend_ra_hdr.icmp6_dataun.icmp6_un_data16[1] = 0; |
| 1129 | else if (ra_options_conf->dfr) { |
| 1130 | ra->nd_ra_router_lifetimend_ra_hdr.icmp6_dataun.icmp6_un_data16[1] = |
| 1131 | htons(ra_options_conf->router_lifetime)(__uint16_t)(__builtin_constant_p(ra_options_conf->router_lifetime ) ? (__uint16_t)(((__uint16_t)(ra_options_conf->router_lifetime ) & 0xffU) << 8 | ((__uint16_t)(ra_options_conf-> router_lifetime) & 0xff00U) >> 8) : __swap16md(ra_options_conf ->router_lifetime)); |
| 1132 | } |
| 1133 | ra->nd_ra_reachable = htonl(ra_options_conf->reachable_time)(__uint32_t)(__builtin_constant_p(ra_options_conf->reachable_time ) ? (__uint32_t)(((__uint32_t)(ra_options_conf->reachable_time ) & 0xff) << 24 | ((__uint32_t)(ra_options_conf-> reachable_time) & 0xff00) << 8 | ((__uint32_t)(ra_options_conf ->reachable_time) & 0xff0000) >> 8 | ((__uint32_t )(ra_options_conf->reachable_time) & 0xff000000) >> 24) : __swap32md(ra_options_conf->reachable_time)); |
| 1134 | ra->nd_ra_retransmit = htonl(ra_options_conf->retrans_timer)(__uint32_t)(__builtin_constant_p(ra_options_conf->retrans_timer ) ? (__uint32_t)(((__uint32_t)(ra_options_conf->retrans_timer ) & 0xff) << 24 | ((__uint32_t)(ra_options_conf-> retrans_timer) & 0xff00) << 8 | ((__uint32_t)(ra_options_conf ->retrans_timer) & 0xff0000) >> 8 | ((__uint32_t )(ra_options_conf->retrans_timer) & 0xff000000) >> 24) : __swap32md(ra_options_conf->retrans_timer)); |
| 1135 | p += sizeof(*ra); |
| 1136 | |
| 1137 | if (ra_options_conf->mtu > 0) { |
| 1138 | ndopt_mtu = (struct nd_opt_mtu *)p; |
| 1139 | ndopt_mtu->nd_opt_mtu_type = ND_OPT_MTU5; |
| 1140 | ndopt_mtu->nd_opt_mtu_len = 1; |
| 1141 | ndopt_mtu->nd_opt_mtu_reserved = 0; |
| 1142 | ndopt_mtu->nd_opt_mtu_mtu = htonl(ra_options_conf->mtu)(__uint32_t)(__builtin_constant_p(ra_options_conf->mtu) ? ( __uint32_t)(((__uint32_t)(ra_options_conf->mtu) & 0xff ) << 24 | ((__uint32_t)(ra_options_conf->mtu) & 0xff00 ) << 8 | ((__uint32_t)(ra_options_conf->mtu) & 0xff0000 ) >> 8 | ((__uint32_t)(ra_options_conf->mtu) & 0xff000000 ) >> 24) : __swap32md(ra_options_conf->mtu)); |
| 1143 | p += sizeof(*ndopt_mtu); |
| 1144 | } |
| 1145 | |
| 1146 | SIMPLEQ_FOREACH(ra_prefix_conf, &ra_iface->prefixes, entry)for((ra_prefix_conf) = ((&ra_iface->prefixes)->sqh_first ); (ra_prefix_conf) != ((void *)0); (ra_prefix_conf) = ((ra_prefix_conf )->entry.sqe_next)) { |
| 1147 | ndopt_pi = (struct nd_opt_prefix_info *)p; |
| 1148 | memset(ndopt_pi, 0, sizeof(*ndopt_pi)); |
| 1149 | ndopt_pi->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION3; |
| 1150 | ndopt_pi->nd_opt_pi_len = 4; |
| 1151 | ndopt_pi->nd_opt_pi_prefix_len = ra_prefix_conf->prefixlen; |
| 1152 | if (ra_prefix_conf->lflag) |
| 1153 | ndopt_pi->nd_opt_pi_flags_reserved |= |
| 1154 | ND_OPT_PI_FLAG_ONLINK0x80; |
| 1155 | if (ra_prefix_conf->aflag) |
| 1156 | ndopt_pi->nd_opt_pi_flags_reserved |= |
| 1157 | ND_OPT_PI_FLAG_AUTO0x40; |
| 1158 | ndopt_pi->nd_opt_pi_valid_time = htonl(ra_prefix_conf->vltime)(__uint32_t)(__builtin_constant_p(ra_prefix_conf->vltime) ? (__uint32_t)(((__uint32_t)(ra_prefix_conf->vltime) & 0xff ) << 24 | ((__uint32_t)(ra_prefix_conf->vltime) & 0xff00) << 8 | ((__uint32_t)(ra_prefix_conf->vltime ) & 0xff0000) >> 8 | ((__uint32_t)(ra_prefix_conf-> vltime) & 0xff000000) >> 24) : __swap32md(ra_prefix_conf ->vltime)); |
| 1159 | ndopt_pi->nd_opt_pi_preferred_time = |
| 1160 | htonl(ra_prefix_conf->pltime)(__uint32_t)(__builtin_constant_p(ra_prefix_conf->pltime) ? (__uint32_t)(((__uint32_t)(ra_prefix_conf->pltime) & 0xff ) << 24 | ((__uint32_t)(ra_prefix_conf->pltime) & 0xff00) << 8 | ((__uint32_t)(ra_prefix_conf->pltime ) & 0xff0000) >> 8 | ((__uint32_t)(ra_prefix_conf-> pltime) & 0xff000000) >> 24) : __swap32md(ra_prefix_conf ->pltime)); |
| 1161 | ndopt_pi->nd_opt_pi_prefix = ra_prefix_conf->prefix; |
| 1162 | |
| 1163 | p += sizeof(*ndopt_pi); |
| 1164 | } |
| 1165 | |
| 1166 | if (ra_iface_conf->ra_options.rdnss_count > 0) { |
| 1167 | ndopt_rdnss = (struct nd_opt_rdnss *)p; |
| 1168 | ndopt_rdnss->nd_opt_rdnss_type = ND_OPT_RDNSS25; |
| 1169 | ndopt_rdnss->nd_opt_rdnss_len = 1 + |
| 1170 | ra_iface_conf->ra_options.rdnss_count * 2; |
| 1171 | ndopt_rdnss->nd_opt_rdnss_reserved = 0; |
| 1172 | ndopt_rdnss->nd_opt_rdnss_lifetime = |
| 1173 | htonl(ra_iface_conf->ra_options.rdns_lifetime)(__uint32_t)(__builtin_constant_p(ra_iface_conf->ra_options .rdns_lifetime) ? (__uint32_t)(((__uint32_t)(ra_iface_conf-> ra_options.rdns_lifetime) & 0xff) << 24 | ((__uint32_t )(ra_iface_conf->ra_options.rdns_lifetime) & 0xff00) << 8 | ((__uint32_t)(ra_iface_conf->ra_options.rdns_lifetime ) & 0xff0000) >> 8 | ((__uint32_t)(ra_iface_conf-> ra_options.rdns_lifetime) & 0xff000000) >> 24) : __swap32md (ra_iface_conf->ra_options.rdns_lifetime)); |
| 1174 | p += sizeof(struct nd_opt_rdnss); |
| 1175 | SIMPLEQ_FOREACH(ra_rdnss,for((ra_rdnss) = ((&ra_iface_conf->ra_options.ra_rdnss_list )->sqh_first); (ra_rdnss) != ((void *)0); (ra_rdnss) = ((ra_rdnss )->entry.sqe_next)) |
| 1176 | &ra_iface_conf->ra_options.ra_rdnss_list, entry)for((ra_rdnss) = ((&ra_iface_conf->ra_options.ra_rdnss_list )->sqh_first); (ra_rdnss) != ((void *)0); (ra_rdnss) = ((ra_rdnss )->entry.sqe_next)) { |
| 1177 | memcpy(p, &ra_rdnss->rdnss, sizeof(ra_rdnss->rdnss)); |
| 1178 | p += sizeof(ra_rdnss->rdnss); |
| 1179 | } |
| 1180 | } |
| 1181 | |
| 1182 | if (ra_iface_conf->ra_options.dnssl_len > 0) { |
| 1183 | ndopt_dnssl = (struct nd_opt_dnssl *)p; |
| 1184 | ndopt_dnssl->nd_opt_dnssl_type = ND_OPT_DNSSL31; |
| 1185 | /* round up to 8 byte boundary */ |
| 1186 | ndopt_dnssl->nd_opt_dnssl_len = 1 + |
| 1187 | ((ra_iface_conf->ra_options.dnssl_len + 7) & ~7) / 8; |
| 1188 | ndopt_dnssl->nd_opt_dnssl_reserved = 0; |
| 1189 | ndopt_dnssl->nd_opt_dnssl_lifetime = |
| 1190 | htonl(ra_iface_conf->ra_options.rdns_lifetime)(__uint32_t)(__builtin_constant_p(ra_iface_conf->ra_options .rdns_lifetime) ? (__uint32_t)(((__uint32_t)(ra_iface_conf-> ra_options.rdns_lifetime) & 0xff) << 24 | ((__uint32_t )(ra_iface_conf->ra_options.rdns_lifetime) & 0xff00) << 8 | ((__uint32_t)(ra_iface_conf->ra_options.rdns_lifetime ) & 0xff0000) >> 8 | ((__uint32_t)(ra_iface_conf-> ra_options.rdns_lifetime) & 0xff000000) >> 24) : __swap32md (ra_iface_conf->ra_options.rdns_lifetime)); |
| 1191 | p += sizeof(struct nd_opt_dnssl); |
| 1192 | |
| 1193 | SIMPLEQ_FOREACH(ra_dnssl,for((ra_dnssl) = ((&ra_iface_conf->ra_options.ra_dnssl_list )->sqh_first); (ra_dnssl) != ((void *)0); (ra_dnssl) = ((ra_dnssl )->entry.sqe_next)) |
| 1194 | &ra_iface_conf->ra_options.ra_dnssl_list, entry)for((ra_dnssl) = ((&ra_iface_conf->ra_options.ra_dnssl_list )->sqh_first); (ra_dnssl) != ((void *)0); (ra_dnssl) = ((ra_dnssl )->entry.sqe_next)) { |
| 1195 | label_start = ra_dnssl->search; |
| 1196 | while ((label_end = strchr(label_start, '.')) != NULL((void *)0)) { |
| 1197 | label_len = label_end - label_start; |
| 1198 | *p++ = label_len; |
| 1199 | memcpy(p, label_start, label_len); |
| 1200 | p += label_len; |
| 1201 | label_start = label_end + 1; |
| 1202 | } |
| 1203 | *p++ = '\0'; /* last dot */ |
| 1204 | } |
| 1205 | /* zero pad */ |
| 1206 | while (((uintptr_t)p) % 8 != 0) |
| 1207 | *p++ = '\0'; |
| 1208 | } |
| 1209 | |
| 1210 | if (len != ra_iface->datalen || memcmp(buf, ra_iface->data, len) |
| 1211 | != 0) { |
| 1212 | memcpy(ra_iface->data, buf, len); |
| 1213 | ra_iface->datalen = len; |
| 1214 | /* packet changed; tell engine to send new advertisments */ |
| 1215 | if (event_initialized(&ra_iface->icmp6ev->ev)((&ra_iface->icmp6ev->ev)->ev_flags & 0x80)) |
| 1216 | frontend_imsg_compose_engine(IMSG_UPDATE_IF, 0, |
| 1217 | &ra_iface->if_index, sizeof(ra_iface->if_index)); |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | void |
| 1222 | build_leaving_packet(struct ra_iface *ra_iface) |
| 1223 | { |
| 1224 | struct nd_router_advert ra; |
| 1225 | size_t len; |
| 1226 | |
| 1227 | len = sizeof(ra); |
Value stored to 'len' is never read | |
| 1228 | |
| 1229 | memset(&ra, 0, sizeof(ra)); |
| 1230 | |
| 1231 | ra.nd_ra_typend_ra_hdr.icmp6_type = ND_ROUTER_ADVERT134; |
| 1232 | |
| 1233 | memcpy(ra_iface->data, &ra, sizeof(ra)); |
| 1234 | ra_iface->datalen = sizeof(ra); |
| 1235 | } |
| 1236 | |
| 1237 | void |
| 1238 | ra_output(struct ra_iface *ra_iface, struct sockaddr_in6 *to) |
| 1239 | { |
| 1240 | |
| 1241 | struct cmsghdr *cm; |
| 1242 | struct in6_pktinfo *pi; |
| 1243 | ssize_t len; |
| 1244 | int hoplimit = 255; |
| 1245 | |
| 1246 | if (!LINK_STATE_IS_UP(ra_iface->link_state)((ra_iface->link_state) >= 4 || (ra_iface->link_state ) == 0)) |
| 1247 | return; |
| 1248 | |
| 1249 | sndmhdr.msg_name = to; |
| 1250 | sndmhdr.msg_iov[0].iov_base = ra_iface->data; |
| 1251 | sndmhdr.msg_iov[0].iov_len = ra_iface->datalen; |
| 1252 | |
| 1253 | cm = CMSG_FIRSTHDR(&sndmhdr)((&sndmhdr)->msg_controllen >= sizeof(struct cmsghdr ) ? (struct cmsghdr *)(&sndmhdr)->msg_control : (struct cmsghdr *)((void *)0)); |
| 1254 | /* specify the outgoing interface */ |
| 1255 | cm->cmsg_level = IPPROTO_IPV641; |
| 1256 | cm->cmsg_type = IPV6_PKTINFO46; |
| 1257 | cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(struct in6_pktinfo))); |
| 1258 | pi = (struct in6_pktinfo *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 1259 | memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); |
| 1260 | pi->ipi6_ifindex = ra_iface->if_index; |
| 1261 | |
| 1262 | /* specify the hop limit of the packet */ |
| 1263 | cm = CMSG_NXTHDR(&sndmhdr, cm)(((char *)(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof (long) - 1)) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof (struct cmsghdr)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)) > ((char *)(&sndmhdr)->msg_control) + (&sndmhdr )->msg_controllen) ? (struct cmsghdr *)((void *)0) : (struct cmsghdr *)((char *)(cm) + (((unsigned long)((cm)->cmsg_len ) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))); |
| 1264 | cm->cmsg_level = IPPROTO_IPV641; |
| 1265 | cm->cmsg_type = IPV6_HOPLIMIT47; |
| 1266 | cm->cmsg_len = CMSG_LEN(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(int))); |
| 1267 | memcpy(CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))), &hoplimit, sizeof(int)); |
| 1268 | |
| 1269 | log_debug("send RA on %s", ra_iface->name); |
| 1270 | |
| 1271 | len = sendmsg(EVENT_FD(&ra_iface->icmp6ev->ev)(int)(&ra_iface->icmp6ev->ev)->ev_fd, &sndmhdr, 0); |
| 1272 | if (len == -1) |
| 1273 | log_warn("sendmsg on %s", ra_iface->name); |
| 1274 | |
| 1275 | } |
| 1276 | |
| 1277 | #define ROUNDUP(a)((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof (long)) \ |
| 1278 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) |
| 1279 | |
| 1280 | void |
| 1281 | get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) |
| 1282 | { |
| 1283 | int i; |
| 1284 | |
| 1285 | for (i = 0; i < RTAX_MAX15; i++) { |
| 1286 | if (addrs & (1 << i)) { |
| 1287 | rti_info[i] = sa; |
| 1288 | sa = (struct sockaddr *)((char *)(sa) + |
| 1289 | ROUNDUP(sa->sa_len)((sa->sa_len) > 0 ? (1 + (((sa->sa_len) - 1) | (sizeof (long) - 1))) : sizeof(long))); |
| 1290 | } else |
| 1291 | rti_info[i] = NULL((void *)0); |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | void |
| 1296 | route_receive(int fd, short events, void *arg) |
| 1297 | { |
| 1298 | static uint8_t *buf; |
| 1299 | |
| 1300 | struct rt_msghdr *rtm; |
| 1301 | struct sockaddr *sa, *rti_info[RTAX_MAX15]; |
| 1302 | ssize_t n; |
| 1303 | |
| 1304 | if (buf == NULL((void *)0)) { |
| 1305 | buf = malloc(ROUTE_SOCKET_BUF_SIZE16384); |
| 1306 | if (buf == NULL((void *)0)) |
| 1307 | fatal("malloc"); |
| 1308 | } |
| 1309 | rtm = (struct rt_msghdr *)buf; |
| 1310 | if ((n = read(fd, buf, ROUTE_SOCKET_BUF_SIZE16384)) == -1) { |
| 1311 | if (errno(*__errno()) == EAGAIN35 || errno(*__errno()) == EINTR4) |
| 1312 | return; |
| 1313 | log_warn("dispatch_rtmsg: read error"); |
| 1314 | return; |
| 1315 | } |
| 1316 | |
| 1317 | if (n == 0) |
| 1318 | fatal("routing socket closed"); |
| 1319 | |
| 1320 | if (n < (ssize_t)sizeof(rtm->rtm_msglen) || n < rtm->rtm_msglen) { |
| 1321 | log_warnx("partial rtm of %zd in buffer", n); |
| 1322 | return; |
| 1323 | } |
| 1324 | |
| 1325 | if (rtm->rtm_version != RTM_VERSION5) |
| 1326 | return; |
| 1327 | |
| 1328 | sa = (struct sockaddr *)(buf + rtm->rtm_hdrlen); |
| 1329 | get_rtaddrs(rtm->rtm_addrs, sa, rti_info); |
| 1330 | |
| 1331 | handle_route_message(rtm, rti_info); |
| 1332 | } |
| 1333 | |
| 1334 | void |
| 1335 | handle_route_message(struct rt_msghdr *rtm, struct sockaddr **rti_info) |
| 1336 | { |
| 1337 | switch (rtm->rtm_type) { |
| 1338 | case RTM_IFINFO0xe: |
| 1339 | case RTM_NEWADDR0xc: |
| 1340 | case RTM_DELADDR0xd: |
| 1341 | case RTM_CHGADDRATTR0x14: |
| 1342 | /* |
| 1343 | * do the same thing as after a config reload when interfaces |
| 1344 | * change or IPv6 addresses show up / disappear |
| 1345 | */ |
| 1346 | merge_ra_interfaces(); |
| 1347 | break; |
| 1348 | default: |
| 1349 | log_debug("unexpected RTM: %d", rtm->rtm_type); |
| 1350 | break; |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | struct icmp6_ev* |
| 1355 | get_icmp6ev_by_rdomain(int rdomain) |
| 1356 | { |
| 1357 | struct ra_iface *ra_iface; |
| 1358 | struct icmp6_ev *icmp6ev = NULL((void *)0); |
| 1359 | |
| 1360 | TAILQ_FOREACH (ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) { |
| 1361 | if (ra_iface->rdomain == rdomain) { |
| 1362 | icmp6ev = ra_iface->icmp6ev; |
| 1363 | break; |
| 1364 | } |
| 1365 | } |
| 1366 | |
| 1367 | if (icmp6ev == NULL((void *)0)) { |
| 1368 | if ((icmp6ev = calloc(1, sizeof(*icmp6ev))) == NULL((void *)0)) |
| 1369 | fatal("calloc"); |
| 1370 | |
| 1371 | icmp6ev->rcviov[0].iov_base = (caddr_t)icmp6ev->answer; |
| 1372 | icmp6ev->rcviov[0].iov_len = sizeof(icmp6ev->answer); |
| 1373 | icmp6ev->rcvmhdr.msg_name = (caddr_t)&icmp6ev->from; |
| 1374 | icmp6ev->rcvmhdr.msg_namelen = sizeof(icmp6ev->from); |
| 1375 | icmp6ev->rcvmhdr.msg_iov = icmp6ev->rcviov; |
| 1376 | icmp6ev->rcvmhdr.msg_iovlen = 1; |
| 1377 | icmp6ev->rcvmhdr.msg_controllen = |
| 1378 | CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) )) + |
| 1379 | CMSG_SPACE(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(int)) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 1380 | if ((icmp6ev->rcvmhdr.msg_control = malloc(icmp6ev-> |
| 1381 | rcvmhdr.msg_controllen)) == NULL((void *)0)) |
| 1382 | fatal("malloc"); |
| 1383 | frontend_imsg_compose_main(IMSG_OPEN_ICMP6SOCK, 0, |
| 1384 | &rdomain, sizeof(rdomain)); |
| 1385 | } |
| 1386 | |
| 1387 | icmp6ev->refcnt++; |
| 1388 | return (icmp6ev); |
| 1389 | } |
| 1390 | |
| 1391 | void |
| 1392 | unref_icmp6ev(struct ra_iface *ra_iface) |
| 1393 | { |
| 1394 | struct icmp6_ev *icmp6ev = ra_iface->icmp6ev; |
| 1395 | |
| 1396 | ra_iface->icmp6ev = NULL((void *)0); |
| 1397 | |
| 1398 | if (icmp6ev != NULL((void *)0)) { |
| 1399 | icmp6ev->refcnt--; |
| 1400 | if (icmp6ev->refcnt == 0) { |
| 1401 | event_del(&icmp6ev->ev); |
| 1402 | close(EVENT_FD(&icmp6ev->ev)(int)(&icmp6ev->ev)->ev_fd); |
| 1403 | free(icmp6ev); |
| 1404 | } |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | void |
| 1409 | set_icmp6sock(int icmp6sock, int rdomain) |
| 1410 | { |
| 1411 | struct ra_iface *ra_iface; |
| 1412 | |
| 1413 | TAILQ_FOREACH (ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) { |
| 1414 | if (!event_initialized(&ra_iface->icmp6ev->ev)((&ra_iface->icmp6ev->ev)->ev_flags & 0x80) && |
| 1415 | ra_iface->rdomain == rdomain) { |
| 1416 | event_set(&ra_iface->icmp6ev->ev, icmp6sock, EV_READ0x02 | |
| 1417 | EV_PERSIST0x10, icmp6_receive, ra_iface->icmp6ev); |
| 1418 | event_add(&ra_iface->icmp6ev->ev, NULL((void *)0)); |
| 1419 | icmp6sock = -1; |
| 1420 | break; |
| 1421 | } |
| 1422 | } |
| 1423 | |
| 1424 | if (icmp6sock != -1) { |
| 1425 | /* |
| 1426 | * The interface disappeared or changed rdomain while we were |
| 1427 | * waiting for the parent process to open the raw socket. |
| 1428 | */ |
| 1429 | close(icmp6sock); |
| 1430 | return; |
| 1431 | } |
| 1432 | |
| 1433 | TAILQ_FOREACH (ra_iface, &ra_interfaces, entry)for((ra_iface) = ((&ra_interfaces)->tqh_first); (ra_iface ) != ((void *)0); (ra_iface) = ((ra_iface)->entry.tqe_next )) { |
| 1434 | if (ra_iface->rdomain == rdomain) { |
| 1435 | join_all_routers_mcast_group(ra_iface); |
| 1436 | frontend_imsg_compose_engine(IMSG_UPDATE_IF, 0, |
| 1437 | &ra_iface->if_index, sizeof(ra_iface->if_index)); |
| 1438 | } |
| 1439 | } |
| 1440 | } |