Samuel Tan | d7ed851 | 2015-08-13 16:11:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dhcpcd - DHCP client daemon |
| 3 | * Copyright (c) 2006-2015 Roy Marples <roy@marples.name> |
| 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 | |
| 28 | #include <sys/stat.h> |
| 29 | #include <sys/uio.h> |
| 30 | #include <sys/wait.h> |
| 31 | |
| 32 | #include <netinet/in.h> |
| 33 | #include <arpa/inet.h> |
| 34 | |
| 35 | #include <ctype.h> |
| 36 | #include <errno.h> |
| 37 | #include <signal.h> |
| 38 | /* We can't include spawn.h here because it may not exist. |
| 39 | * config.h will pull it in, or our compat one. */ |
| 40 | #include <stdlib.h> |
| 41 | #include <string.h> |
| 42 | #include <unistd.h> |
| 43 | |
| 44 | #include "config.h" |
| 45 | #include "common.h" |
| 46 | #include "dhcp.h" |
| 47 | #include "dhcp6.h" |
| 48 | #include "if.h" |
| 49 | #include "if-options.h" |
| 50 | #include "ipv6nd.h" |
| 51 | #include "script.h" |
| 52 | |
| 53 | #ifdef HAVE_SPAWN_H |
| 54 | #include <spawn.h> |
| 55 | #else |
| 56 | #include "compat/posix_spawn.h" |
| 57 | #endif |
| 58 | |
| 59 | /* Allow the OS to define another script env var name */ |
| 60 | #ifndef RC_SVCNAME |
| 61 | #define RC_SVCNAME "RC_SVCNAME" |
| 62 | #endif |
| 63 | |
| 64 | #define DEFAULT_PATH "PATH=/usr/bin:/usr/sbin:/bin:/sbin" |
| 65 | |
| 66 | static const char * const if_params[] = { |
| 67 | "interface", |
| 68 | "reason", |
| 69 | "pid", |
| 70 | "ifcarrier", |
| 71 | "ifmetric", |
| 72 | "ifwireless", |
| 73 | "ifflags", |
| 74 | "ssid", |
| 75 | "profile", |
| 76 | "interface_order", |
| 77 | NULL |
| 78 | }; |
| 79 | |
| 80 | void |
| 81 | if_printoptions(void) |
| 82 | { |
| 83 | const char * const *p; |
| 84 | |
| 85 | for (p = if_params; *p; p++) |
| 86 | printf(" - %s\n", *p); |
| 87 | } |
| 88 | |
| 89 | static int |
| 90 | exec_script(const struct dhcpcd_ctx *ctx, char *const *argv, char *const *env) |
| 91 | { |
| 92 | pid_t pid; |
| 93 | posix_spawnattr_t attr; |
| 94 | int i; |
| 95 | #ifdef USE_SIGNALS |
| 96 | short flags; |
| 97 | sigset_t defsigs; |
| 98 | #else |
| 99 | UNUSED(ctx); |
| 100 | #endif |
| 101 | |
| 102 | /* posix_spawn is a safe way of executing another image |
| 103 | * and changing signals back to how they should be. */ |
| 104 | if (posix_spawnattr_init(&attr) == -1) |
| 105 | return -1; |
| 106 | #ifdef USE_SIGNALS |
| 107 | flags = POSIX_SPAWN_SETSIGMASK | POSIX_SPAWN_SETSIGDEF; |
| 108 | posix_spawnattr_setflags(&attr, flags); |
| 109 | sigemptyset(&defsigs); |
| 110 | for (i = 0; dhcpcd_handlesigs[i]; i++) |
| 111 | sigaddset(&defsigs, dhcpcd_handlesigs[i]); |
| 112 | posix_spawnattr_setsigdefault(&attr, &defsigs); |
| 113 | posix_spawnattr_setsigmask(&attr, &ctx->sigset); |
| 114 | #endif |
| 115 | errno = 0; |
| 116 | i = posix_spawn(&pid, argv[0], NULL, &attr, argv, env); |
| 117 | if (i) { |
| 118 | errno = i; |
| 119 | return -1; |
| 120 | } |
| 121 | return pid; |
| 122 | } |
| 123 | |
| 124 | #ifdef INET |
| 125 | static char * |
| 126 | make_var(struct dhcpcd_ctx *ctx, const char *prefix, const char *var) |
| 127 | { |
| 128 | size_t len; |
| 129 | char *v; |
| 130 | |
| 131 | len = strlen(prefix) + strlen(var) + 2; |
| 132 | v = malloc(len); |
| 133 | if (v == NULL) { |
| 134 | logger(ctx, LOG_ERR, "%s: %m", __func__); |
| 135 | return NULL; |
| 136 | } |
| 137 | snprintf(v, len, "%s_%s", prefix, var); |
| 138 | return v; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | static int |
| 143 | append_config(struct dhcpcd_ctx *ctx, char ***env, size_t *len, |
| 144 | const char *prefix, const char *const *config) |
| 145 | { |
| 146 | size_t i, j, e1; |
| 147 | char **ne, *eq, **nep, *p; |
| 148 | int ret; |
| 149 | |
| 150 | if (config == NULL) |
| 151 | return 0; |
| 152 | |
| 153 | ne = *env; |
| 154 | ret = 0; |
| 155 | for (i = 0; config[i] != NULL; i++) { |
| 156 | eq = strchr(config[i], '='); |
| 157 | e1 = (size_t)(eq - config[i] + 1); |
| 158 | for (j = 0; j < *len; j++) { |
| 159 | if (strncmp(ne[j] + strlen(prefix) + 1, |
| 160 | config[i], e1) == 0) |
| 161 | { |
| 162 | p = make_var(ctx, prefix, config[i]); |
| 163 | if (p == NULL) { |
| 164 | ret = -1; |
| 165 | break; |
| 166 | } |
| 167 | free(ne[j]); |
| 168 | ne[j] = p; |
| 169 | break; |
| 170 | } |
| 171 | } |
| 172 | if (j == *len) { |
| 173 | j++; |
| 174 | p = make_var(ctx, prefix, config[i]); |
| 175 | if (p == NULL) { |
| 176 | ret = -1; |
| 177 | break; |
| 178 | } |
| 179 | nep = realloc(ne, sizeof(char *) * (j + 1)); |
| 180 | if (nep == NULL) { |
| 181 | logger(ctx, LOG_ERR, "%s: %m", __func__); |
| 182 | free(p); |
| 183 | ret = -1; |
| 184 | break; |
| 185 | } |
| 186 | ne = nep; |
| 187 | ne[j - 1] = p; |
| 188 | *len = j; |
| 189 | } |
| 190 | } |
| 191 | *env = ne; |
| 192 | return ret; |
| 193 | } |
| 194 | #endif |
| 195 | |
| 196 | static ssize_t |
| 197 | arraytostr(const char *const *argv, char **s) |
| 198 | { |
| 199 | const char *const *ap; |
| 200 | char *p; |
| 201 | size_t len, l; |
| 202 | |
| 203 | if (*argv == NULL) |
| 204 | return 0; |
| 205 | len = 0; |
| 206 | ap = argv; |
| 207 | while (*ap) |
| 208 | len += strlen(*ap++) + 1; |
| 209 | *s = p = malloc(len); |
| 210 | if (p == NULL) |
| 211 | return -1; |
| 212 | ap = argv; |
| 213 | while (*ap) { |
| 214 | l = strlen(*ap) + 1; |
| 215 | memcpy(p, *ap, l); |
| 216 | p += l; |
| 217 | ap++; |
| 218 | } |
| 219 | return (ssize_t)len; |
| 220 | } |
| 221 | |
| 222 | static ssize_t |
| 223 | make_env(const struct interface *ifp, const char *reason, char ***argv) |
| 224 | { |
| 225 | char **env, **nenv, *p; |
| 226 | size_t e, elen, l; |
| 227 | #if defined(INET) || defined(INET6) |
| 228 | ssize_t n; |
| 229 | #endif |
| 230 | const struct if_options *ifo = ifp->options; |
| 231 | const struct interface *ifp2; |
| 232 | #ifdef INET |
| 233 | int dhcp; |
| 234 | const struct dhcp_state *state; |
| 235 | #endif |
| 236 | #ifdef INET6 |
| 237 | const struct dhcp6_state *d6_state; |
| 238 | int dhcp6, ra; |
| 239 | #endif |
| 240 | |
| 241 | #ifdef INET |
| 242 | dhcp = 0; |
| 243 | state = D_STATE(ifp); |
| 244 | #endif |
| 245 | #ifdef INET6 |
| 246 | dhcp6 = ra = 0; |
| 247 | d6_state = D6_CSTATE(ifp); |
| 248 | #endif |
| 249 | if (strcmp(reason, "TEST") == 0) { |
| 250 | if (1 == 2) {} |
| 251 | #ifdef INET6 |
| 252 | else if (d6_state && d6_state->new) |
| 253 | dhcp6 = 1; |
| 254 | else if (ipv6nd_hasra(ifp)) |
| 255 | ra = 1; |
| 256 | #endif |
| 257 | #ifdef INET |
| 258 | else |
| 259 | dhcp = 1; |
| 260 | #endif |
| 261 | } |
| 262 | #ifdef INET6 |
| 263 | else if (reason[strlen(reason) - 1] == '6') |
| 264 | dhcp6 = 1; |
| 265 | else if (strcmp(reason, "ROUTERADVERT") == 0) |
| 266 | ra = 1; |
| 267 | #endif |
| 268 | else if (strcmp(reason, "PREINIT") == 0 || |
| 269 | strcmp(reason, "CARRIER") == 0 || |
| 270 | strcmp(reason, "NOCARRIER") == 0 || |
| 271 | strcmp(reason, "UNKNOWN") == 0 || |
| 272 | strcmp(reason, "DEPARTED") == 0 || |
| 273 | strcmp(reason, "STOPPED") == 0) |
| 274 | { |
| 275 | /* This space left intentionally blank */ |
| 276 | } |
| 277 | #ifdef INET |
| 278 | else |
| 279 | dhcp = 1; |
| 280 | #endif |
| 281 | |
| 282 | /* When dumping the lease, we only want to report interface and |
| 283 | reason - the other interface variables are meaningless */ |
| 284 | if (ifp->ctx->options & DHCPCD_DUMPLEASE) |
| 285 | elen = 2; |
| 286 | else |
| 287 | elen = 13; |
| 288 | |
| 289 | #define EMALLOC(i, l) if ((env[(i)] = malloc((l))) == NULL) goto eexit; |
| 290 | /* Make our env + space for profile, wireless and debug */ |
| 291 | env = calloc(1, sizeof(char *) * (elen + 3 + 1)); |
| 292 | if (env == NULL) |
| 293 | goto eexit; |
| 294 | e = strlen("interface") + strlen(ifp->name) + 2; |
| 295 | EMALLOC(0, e); |
| 296 | snprintf(env[0], e, "interface=%s", ifp->name); |
| 297 | e = strlen("reason") + strlen(reason) + 2; |
| 298 | EMALLOC(1, e); |
| 299 | snprintf(env[1], e, "reason=%s", reason); |
| 300 | if (ifp->ctx->options & DHCPCD_DUMPLEASE) |
| 301 | goto dumplease; |
| 302 | e = 20; |
| 303 | EMALLOC(2, e); |
| 304 | snprintf(env[2], e, "pid=%d", getpid()); |
| 305 | EMALLOC(3, e); |
| 306 | snprintf(env[3], e, "ifcarrier=%s", |
| 307 | ifp->carrier == LINK_UNKNOWN ? "unknown" : |
| 308 | ifp->carrier == LINK_UP ? "up" : "down"); |
| 309 | EMALLOC(4, e); |
| 310 | snprintf(env[4], e, "ifmetric=%d", ifp->metric); |
| 311 | EMALLOC(5, e); |
| 312 | snprintf(env[5], e, "ifwireless=%d", ifp->wireless); |
| 313 | EMALLOC(6, e); |
| 314 | snprintf(env[6], e, "ifflags=%u", ifp->flags); |
| 315 | EMALLOC(7, e); |
| 316 | snprintf(env[7], e, "ifmtu=%d", if_getmtu(ifp->name)); |
| 317 | l = e = strlen("interface_order="); |
| 318 | TAILQ_FOREACH(ifp2, ifp->ctx->ifaces, next) { |
| 319 | if (!(ifp2->options->options & DHCPCD_PFXDLGONLY)) |
| 320 | e += strlen(ifp2->name) + 1; |
| 321 | } |
| 322 | EMALLOC(8, e); |
| 323 | p = env[8]; |
| 324 | strlcpy(p, "interface_order=", e); |
| 325 | e -= l; |
| 326 | p += l; |
| 327 | TAILQ_FOREACH(ifp2, ifp->ctx->ifaces, next) { |
| 328 | if (!(ifp2->options->options & DHCPCD_PFXDLGONLY)) { |
| 329 | l = strlcpy(p, ifp2->name, e); |
| 330 | p += l; |
| 331 | e -= l; |
| 332 | *p++ = ' '; |
| 333 | e--; |
| 334 | } |
| 335 | } |
| 336 | *--p = '\0'; |
| 337 | if (strcmp(reason, "STOPPED") == 0) { |
| 338 | env[9] = strdup("if_up=false"); |
| 339 | if (ifo->options & DHCPCD_RELEASE) |
| 340 | env[10] = strdup("if_down=true"); |
| 341 | else |
| 342 | env[10] = strdup("if_down=false"); |
| 343 | } else if (strcmp(reason, "TEST") == 0 || |
| 344 | strcmp(reason, "PREINIT") == 0 || |
| 345 | strcmp(reason, "CARRIER") == 0 || |
| 346 | strcmp(reason, "UNKNOWN") == 0) |
| 347 | { |
| 348 | env[9] = strdup("if_up=false"); |
| 349 | env[10] = strdup("if_down=false"); |
| 350 | } else if (1 == 2 /* appease ifdefs */ |
| 351 | #ifdef INET |
| 352 | || (dhcp && state && state->new) |
| 353 | #endif |
| 354 | #ifdef INET6 |
| 355 | || (dhcp6 && d6_state && d6_state->new) |
| 356 | || (ra && ipv6nd_hasra(ifp)) |
| 357 | #endif |
| 358 | ) |
| 359 | { |
| 360 | env[9] = strdup("if_up=true"); |
| 361 | env[10] = strdup("if_down=false"); |
| 362 | } else { |
| 363 | env[9] = strdup("if_up=false"); |
| 364 | env[10] = strdup("if_down=true"); |
| 365 | } |
| 366 | if (env[9] == NULL || env[10] == NULL) |
| 367 | goto eexit; |
| 368 | if (dhcpcd_oneup(ifp->ctx)) |
| 369 | env[11] = strdup("if_oneup=true"); |
| 370 | else |
| 371 | env[11] = strdup("if_oneup=false"); |
| 372 | if (env[11] == NULL) |
| 373 | goto eexit; |
| 374 | if (dhcpcd_ipwaited(ifp->ctx)) |
| 375 | env[12] = strdup("if_ipwaited=true"); |
| 376 | else |
| 377 | env[12] = strdup("if_ipwaited=false"); |
| 378 | if (env[12] == NULL) |
| 379 | goto eexit; |
| 380 | if (ifo->options & DHCPCD_DEBUG) { |
| 381 | e = strlen("syslog_debug=true") + 1; |
| 382 | EMALLOC(elen, e); |
| 383 | snprintf(env[elen++], e, "syslog_debug=true"); |
| 384 | } |
| 385 | if (*ifp->profile) { |
| 386 | e = strlen("profile=") + strlen(ifp->profile) + 1; |
| 387 | EMALLOC(elen, e); |
| 388 | snprintf(env[elen++], e, "profile=%s", ifp->profile); |
| 389 | } |
| 390 | if (ifp->wireless) { |
| 391 | static const char *pfx = "ifssid="; |
| 392 | size_t pfx_len; |
| 393 | ssize_t psl; |
| 394 | |
| 395 | pfx_len = strlen(pfx); |
| 396 | psl = print_string(NULL, 0, ESCSTRING, |
| 397 | (const uint8_t *)ifp->ssid, ifp->ssid_len); |
| 398 | if (psl != -1) { |
| 399 | EMALLOC(elen, pfx_len + (size_t)psl + 1); |
| 400 | memcpy(env[elen], pfx, pfx_len); |
| 401 | print_string(env[elen] + pfx_len, (size_t)psl + 1, |
| 402 | ESCSTRING, |
| 403 | (const uint8_t *)ifp->ssid, ifp->ssid_len); |
| 404 | elen++; |
| 405 | } |
| 406 | } |
| 407 | #ifdef INET |
| 408 | if (dhcp && state && state->old) { |
| 409 | n = dhcp_env(NULL, NULL, state->old, ifp); |
| 410 | if (n == -1) |
| 411 | goto eexit; |
| 412 | if (n > 0) { |
| 413 | nenv = realloc(env, sizeof(char *) * |
| 414 | (elen + (size_t)n + 1)); |
| 415 | if (nenv == NULL) |
| 416 | goto eexit; |
| 417 | env = nenv; |
| 418 | n = dhcp_env(env + elen, "old", state->old, ifp); |
| 419 | if (n == -1) |
| 420 | goto eexit; |
| 421 | elen += (size_t)n; |
| 422 | } |
| 423 | if (append_config(ifp->ctx, &env, &elen, "old", |
| 424 | (const char *const *)ifo->config) == -1) |
| 425 | goto eexit; |
| 426 | } |
| 427 | #endif |
| 428 | #ifdef INET6 |
| 429 | if (dhcp6 && d6_state && ifo->options & DHCPCD_PFXDLGONLY) { |
| 430 | nenv = realloc(env, sizeof(char *) * (elen + 2)); |
| 431 | if (nenv == NULL) |
| 432 | goto eexit; |
| 433 | env = nenv; |
| 434 | env[elen] = strdup("ifclass=pd"); |
| 435 | if (env[elen] == NULL) |
| 436 | goto eexit; |
| 437 | elen++; |
| 438 | } |
| 439 | if (dhcp6 && d6_state && d6_state->old) { |
| 440 | n = dhcp6_env(NULL, NULL, ifp, |
| 441 | d6_state->old, d6_state->old_len); |
| 442 | if (n > 0) { |
| 443 | nenv = realloc(env, sizeof(char *) * |
| 444 | (elen + (size_t)n + 1)); |
| 445 | if (nenv == NULL) |
| 446 | goto eexit; |
| 447 | env = nenv; |
| 448 | n = dhcp6_env(env + elen, "old", ifp, |
| 449 | d6_state->old, d6_state->old_len); |
| 450 | if (n == -1) |
| 451 | goto eexit; |
| 452 | elen += (size_t)n; |
| 453 | } |
| 454 | } |
| 455 | #endif |
| 456 | |
| 457 | dumplease: |
| 458 | #ifdef INET |
| 459 | if (dhcp && state && state->new) { |
| 460 | n = dhcp_env(NULL, NULL, state->new, ifp); |
| 461 | if (n > 0) { |
| 462 | nenv = realloc(env, sizeof(char *) * |
| 463 | (elen + (size_t)n + 1)); |
| 464 | if (nenv == NULL) |
| 465 | goto eexit; |
| 466 | env = nenv; |
| 467 | n = dhcp_env(env + elen, "new", |
| 468 | state->new, ifp); |
| 469 | if (n == -1) |
| 470 | goto eexit; |
| 471 | elen += (size_t)n; |
| 472 | } |
| 473 | if (append_config(ifp->ctx, &env, &elen, "new", |
| 474 | (const char *const *)ifo->config) == -1) |
| 475 | goto eexit; |
| 476 | } |
| 477 | #endif |
| 478 | #ifdef INET6 |
| 479 | if (dhcp6 && D6_STATE_RUNNING(ifp)) { |
| 480 | n = dhcp6_env(NULL, NULL, ifp, |
| 481 | d6_state->new, d6_state->new_len); |
| 482 | if (n > 0) { |
| 483 | nenv = realloc(env, sizeof(char *) * |
| 484 | (elen + (size_t)n + 1)); |
| 485 | if (nenv == NULL) |
| 486 | goto eexit; |
| 487 | env = nenv; |
| 488 | n = dhcp6_env(env + elen, "new", ifp, |
| 489 | d6_state->new, d6_state->new_len); |
| 490 | if (n == -1) |
| 491 | goto eexit; |
| 492 | elen += (size_t)n; |
| 493 | } |
| 494 | } |
| 495 | if (ra) { |
| 496 | n = ipv6nd_env(NULL, NULL, ifp); |
| 497 | if (n > 0) { |
| 498 | nenv = realloc(env, sizeof(char *) * |
| 499 | (elen + (size_t)n + 1)); |
| 500 | if (nenv == NULL) |
| 501 | goto eexit; |
| 502 | env = nenv; |
| 503 | n = ipv6nd_env(env + elen, NULL, ifp); |
| 504 | if (n == -1) |
| 505 | goto eexit; |
| 506 | elen += (size_t)n; |
| 507 | } |
| 508 | } |
| 509 | #endif |
| 510 | |
| 511 | /* Add our base environment */ |
| 512 | if (ifo->environ) { |
| 513 | e = 0; |
| 514 | while (ifo->environ[e++]) |
| 515 | ; |
| 516 | nenv = realloc(env, sizeof(char *) * (elen + e + 1)); |
| 517 | if (nenv == NULL) |
| 518 | goto eexit; |
| 519 | env = nenv; |
| 520 | e = 0; |
| 521 | while (ifo->environ[e]) { |
| 522 | env[elen + e] = strdup(ifo->environ[e]); |
| 523 | if (env[elen + e] == NULL) |
| 524 | goto eexit; |
| 525 | e++; |
| 526 | } |
| 527 | elen += e; |
| 528 | } |
| 529 | env[elen] = NULL; |
| 530 | |
| 531 | *argv = env; |
| 532 | return (ssize_t)elen; |
| 533 | |
| 534 | eexit: |
| 535 | logger(ifp->ctx, LOG_ERR, "%s: %m", __func__); |
| 536 | if (env) { |
| 537 | nenv = env; |
| 538 | while (*nenv) |
| 539 | free(*nenv++); |
| 540 | free(env); |
| 541 | } |
| 542 | return -1; |
| 543 | } |
| 544 | |
| 545 | static int |
| 546 | send_interface1(struct fd_list *fd, const struct interface *iface, |
| 547 | const char *reason) |
| 548 | { |
| 549 | char **env, **ep, *s; |
| 550 | size_t elen; |
| 551 | int retval; |
| 552 | |
| 553 | if (make_env(iface, reason, &env) == -1) |
| 554 | return -1; |
| 555 | s = NULL; |
| 556 | elen = (size_t)arraytostr((const char *const *)env, &s); |
| 557 | if ((ssize_t)elen == -1) { |
| 558 | free(s); |
| 559 | return -1; |
| 560 | } |
| 561 | retval = control_queue(fd, s, elen, 1); |
| 562 | ep = env; |
| 563 | while (*ep) |
| 564 | free(*ep++); |
| 565 | free(env); |
| 566 | return retval; |
| 567 | } |
| 568 | |
| 569 | int |
| 570 | send_interface(struct fd_list *fd, const struct interface *ifp) |
| 571 | { |
| 572 | const char *reason; |
| 573 | int retval = 0; |
| 574 | #ifdef INET |
| 575 | const struct dhcp_state *d; |
| 576 | #endif |
| 577 | #ifdef INET6 |
| 578 | const struct dhcp6_state *d6; |
| 579 | #endif |
| 580 | |
| 581 | switch (ifp->carrier) { |
| 582 | case LINK_UP: |
| 583 | reason = "CARRIER"; |
| 584 | break; |
| 585 | case LINK_DOWN: |
| 586 | reason = "NOCARRIER"; |
| 587 | break; |
| 588 | default: |
| 589 | reason = "UNKNOWN"; |
| 590 | break; |
| 591 | } |
| 592 | if (send_interface1(fd, ifp, reason) == -1) |
| 593 | retval = -1; |
| 594 | #ifdef INET |
| 595 | if (D_STATE_RUNNING(ifp)) { |
| 596 | d = D_CSTATE(ifp); |
| 597 | if (send_interface1(fd, ifp, d->reason) == -1) |
| 598 | retval = -1; |
| 599 | } |
| 600 | #endif |
| 601 | |
| 602 | #ifdef INET6 |
| 603 | if (RS_STATE_RUNNING(ifp)) { |
| 604 | if (send_interface1(fd, ifp, "ROUTERADVERT") == -1) |
| 605 | retval = -1; |
| 606 | } |
| 607 | if (D6_STATE_RUNNING(ifp)) { |
| 608 | d6 = D6_CSTATE(ifp); |
| 609 | if (send_interface1(fd, ifp, d6->reason) == -1) |
| 610 | retval = -1; |
| 611 | } |
| 612 | #endif |
| 613 | |
| 614 | return retval; |
| 615 | } |
| 616 | |
| 617 | int |
| 618 | script_runreason(const struct interface *ifp, const char *reason) |
| 619 | { |
| 620 | char *argv[2]; |
| 621 | char **env = NULL, **ep; |
| 622 | char *svcname, *path, *bigenv; |
| 623 | size_t e, elen = 0; |
| 624 | pid_t pid; |
| 625 | int status = 0; |
| 626 | struct fd_list *fd; |
| 627 | |
| 628 | if (ifp->options->script && |
| 629 | (ifp->options->script[0] == '\0' || |
| 630 | strcmp(ifp->options->script, "/dev/null") == 0)) |
| 631 | return 0; |
| 632 | |
| 633 | argv[0] = ifp->options->script ? ifp->options->script : UNCONST(SCRIPT); |
| 634 | argv[1] = NULL; |
| 635 | logger(ifp->ctx, LOG_DEBUG, "%s: executing `%s' %s", |
| 636 | ifp->name, argv[0], reason); |
| 637 | |
| 638 | /* Make our env */ |
| 639 | elen = (size_t)make_env(ifp, reason, &env); |
| 640 | if (elen == (size_t)-1) { |
| 641 | logger(ifp->ctx, LOG_ERR, "%s: make_env: %m", ifp->name); |
| 642 | return -1; |
| 643 | } |
| 644 | /* Resize for PATH and RC_SVCNAME */ |
| 645 | svcname = getenv(RC_SVCNAME); |
| 646 | ep = realloc(env, sizeof(char *) * (elen + 2 + (svcname ? 1 : 0))); |
| 647 | if (ep == NULL) { |
| 648 | elen = 0; |
| 649 | goto out; |
| 650 | } |
| 651 | env = ep; |
| 652 | /* Add path to it */ |
| 653 | path = getenv("PATH"); |
| 654 | if (path) { |
| 655 | e = strlen("PATH") + strlen(path) + 2; |
| 656 | env[elen] = malloc(e); |
| 657 | if (env[elen] == NULL) { |
| 658 | elen = 0; |
| 659 | goto out; |
| 660 | } |
| 661 | snprintf(env[elen], e, "PATH=%s", path); |
| 662 | } else { |
| 663 | env[elen] = strdup(DEFAULT_PATH); |
| 664 | if (env[elen] == NULL) { |
| 665 | elen = 0; |
| 666 | goto out; |
| 667 | } |
| 668 | } |
| 669 | if (svcname) { |
| 670 | e = strlen(RC_SVCNAME) + strlen(svcname) + 2; |
| 671 | env[++elen] = malloc(e); |
| 672 | if (env[elen] == NULL) { |
| 673 | elen = 0; |
| 674 | goto out; |
| 675 | } |
| 676 | snprintf(env[elen], e, "%s=%s", RC_SVCNAME, svcname); |
| 677 | } |
| 678 | env[++elen] = NULL; |
| 679 | |
| 680 | pid = exec_script(ifp->ctx, argv, env); |
| 681 | if (pid == -1) |
| 682 | logger(ifp->ctx, LOG_ERR, "%s: %s: %m", __func__, argv[0]); |
| 683 | else if (pid != 0) { |
| 684 | /* Wait for the script to finish */ |
| 685 | while (waitpid(pid, &status, 0) == -1) { |
| 686 | if (errno != EINTR) { |
| 687 | logger(ifp->ctx, LOG_ERR, "waitpid: %m"); |
| 688 | status = 0; |
| 689 | break; |
| 690 | } |
| 691 | } |
| 692 | if (WIFEXITED(status)) { |
| 693 | if (WEXITSTATUS(status)) |
| 694 | logger(ifp->ctx, LOG_ERR, |
| 695 | "%s: %s: WEXITSTATUS %d", |
| 696 | __func__, argv[0], WEXITSTATUS(status)); |
| 697 | } else if (WIFSIGNALED(status)) |
| 698 | logger(ifp->ctx, LOG_ERR, "%s: %s: %s", |
| 699 | __func__, argv[0], strsignal(WTERMSIG(status))); |
| 700 | } |
| 701 | |
| 702 | /* Send to our listeners */ |
| 703 | bigenv = NULL; |
| 704 | status = 0; |
| 705 | TAILQ_FOREACH(fd, &ifp->ctx->control_fds, next) { |
| 706 | if (!(fd->flags & FD_LISTEN)) |
| 707 | continue; |
| 708 | if (bigenv == NULL) { |
| 709 | elen = (size_t)arraytostr((const char *const *)env, |
| 710 | &bigenv); |
| 711 | if ((ssize_t)elen == -1) { |
| 712 | logger(ifp->ctx, LOG_ERR, "%s: arraytostr: %m", |
| 713 | ifp->name); |
| 714 | break; |
| 715 | } |
| 716 | } |
| 717 | if (control_queue(fd, bigenv, elen, 1) == -1) |
| 718 | logger(ifp->ctx, LOG_ERR, |
| 719 | "%s: control_queue: %m", __func__); |
| 720 | else |
| 721 | status = 1; |
| 722 | } |
| 723 | if (!status) |
| 724 | free(bigenv); |
| 725 | |
| 726 | out: |
| 727 | /* Cleanup */ |
| 728 | ep = env; |
| 729 | while (*ep) |
| 730 | free(*ep++); |
| 731 | free(env); |
| 732 | if (elen == 0) |
| 733 | return -1; |
| 734 | return WEXITSTATUS(status); |
| 735 | } |