1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <netinet/in.h> 32 #include <net/if.h> 33 #include <net/if_dl.h> 34 #include <net/route.h> 35 #include <netinet/in_systm.h> 36 #include <netinet/in_var.h> 37 #include <netinet/ip.h> 38 #ifndef NOINET6 39 #include <netinet6/nd6.h> 40 #endif 41 #include <sys/un.h> 42 43 #include <errno.h> 44 #include <string.h> 45 #include <stdarg.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <sys/ioctl.h> 49 #include <sys/sysctl.h> 50 #include <termios.h> 51 #include <unistd.h> 52 53 #include "layer.h" 54 #include "defs.h" 55 #include "command.h" 56 #include "mbuf.h" 57 #include "log.h" 58 #include "id.h" 59 #include "timer.h" 60 #include "fsm.h" 61 #include "iplist.h" 62 #include "lqr.h" 63 #include "hdlc.h" 64 #include "throughput.h" 65 #include "slcompress.h" 66 #include "descriptor.h" 67 #include "ncpaddr.h" 68 #include "ipcp.h" 69 #include "filter.h" 70 #include "lcp.h" 71 #include "ccp.h" 72 #include "link.h" 73 #include "mp.h" 74 #ifndef NORADIUS 75 #include "radius.h" 76 #endif 77 #include "ipv6cp.h" 78 #include "ncp.h" 79 #include "bundle.h" 80 #include "prompt.h" 81 #include "iface.h" 82 83 #define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \ 84 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}} 85 static const struct in6_addr in6mask128 = IN6MASK128; 86 87 88 struct iface * 89 iface_Create(const char *name) 90 { 91 int mib[6], maxtries, err; 92 size_t needed, namelen; 93 char *buf, *ptr, *end; 94 struct if_msghdr *ifm; 95 struct ifa_msghdr *ifam; 96 struct sockaddr_dl *dl; 97 struct sockaddr *sa[RTAX_MAX]; 98 struct iface *iface; 99 struct iface_addr *addr; 100 101 mib[0] = CTL_NET; 102 mib[1] = PF_ROUTE; 103 mib[2] = 0; 104 mib[3] = 0; 105 mib[4] = NET_RT_IFLIST; 106 mib[5] = 0; 107 108 maxtries = 20; 109 err = 0; 110 do { 111 if (maxtries-- == 0 || (err && err != ENOMEM)) { 112 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err)); 113 return NULL; 114 } 115 116 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 117 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n", 118 strerror(errno)); 119 return NULL; 120 } 121 122 if ((buf = (char *)malloc(needed)) == NULL) { 123 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno)); 124 return NULL; 125 } 126 127 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 128 err = errno; 129 free(buf); 130 buf = NULL; 131 } 132 } while (buf == NULL); 133 134 ptr = buf; 135 end = buf + needed; 136 iface = NULL; 137 namelen = strlen(name); 138 139 while (ptr < end && iface == NULL) { 140 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */ 141 if (ifm->ifm_type != RTM_IFINFO) 142 break; 143 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */ 144 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) { 145 iface = (struct iface *)malloc(sizeof *iface); 146 if (iface == NULL) { 147 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno)); 148 free(buf); 149 return NULL; 150 } 151 iface->name = strdup(name); 152 iface->descr = NULL; 153 iface->index = ifm->ifm_index; 154 iface->flags = ifm->ifm_flags; 155 iface->mtu = 0; 156 iface->addrs = 0; 157 iface->addr = NULL; 158 } 159 ptr += ifm->ifm_msglen; /* First ifa_msghdr */ 160 for (; ptr < end; ptr += ifam->ifam_msglen) { 161 ifam = (struct ifa_msghdr *)ptr; /* Next if address */ 162 163 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */ 164 break; 165 166 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) { 167 /* Found a configured interface ! */ 168 iface_ParseHdr(ifam, sa); 169 170 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET 171 #ifndef NOINET6 172 || sa[RTAX_IFA]->sa_family == AF_INET6 173 #endif 174 )) { 175 /* Record the address */ 176 177 addr = (struct iface_addr *) 178 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]); 179 if (addr == NULL) 180 break; 181 iface->addr = addr; 182 183 addr += iface->addrs; 184 iface->addrs++; 185 186 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]); 187 if (sa[RTAX_BRD]) 188 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]); 189 else 190 ncpaddr_init(&addr->peer); 191 } 192 } 193 } 194 } 195 196 free(buf); 197 198 return iface; 199 } 200 201 static int 202 iface_addr_Zap(const char *name, struct iface_addr *addr, int s) 203 { 204 struct ifreq ifr; 205 #ifndef NOINET6 206 struct in6_ifreq ifr6; 207 #endif 208 struct sockaddr_in *me4; 209 struct sockaddr_storage ssme; 210 int res, saved_errno; 211 212 ncprange_getsa(&addr->ifa, &ssme, NULL); 213 res = 0; 214 215 switch (ncprange_family(&addr->ifa)) { 216 case AF_INET: 217 memset(&ifr, '\0', sizeof ifr); 218 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name - 1); 219 me4 = (struct sockaddr_in *)&ifr.ifr_addr; 220 memcpy(me4, &ssme, sizeof *me4); 221 222 res = ID0ioctl(s, SIOCDIFADDR, &ifr); 223 saved_errno = errno; 224 if (log_IsKept(LogDEBUG)) { 225 char buf[NCP_ASCIIBUFFERSIZE]; 226 227 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa)); 228 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n", 229 ifr.ifr_name, buf, ncpaddr_ntoa(&addr->peer), res); 230 } 231 break; 232 233 #ifndef NOINET6 234 case AF_INET6: 235 memset(&ifr6, '\0', sizeof ifr6); 236 strncpy(ifr6.ifr_name, name, sizeof ifr6.ifr_name - 1); 237 memcpy(&ifr6.ifr_addr, &ssme, sizeof ifr6.ifr_addr); 238 239 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifr6); 240 saved_errno = errno; 241 break; 242 #endif 243 } 244 245 if (res == -1) { 246 char dst[NCP_ASCIIBUFFERSIZE]; 247 const char *end = 248 #ifndef NOINET6 249 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" : 250 #endif 251 ""; 252 253 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 254 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n", 255 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno)); 256 else { 257 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer)); 258 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n", 259 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno)); 260 } 261 } 262 263 return res != -1; 264 } 265 266 static int 267 iface_addr_Add(const char *name, struct iface_addr *addr, int s) 268 { 269 struct ifaliasreq ifra; 270 #ifndef NOINET6 271 struct in6_aliasreq ifra6; 272 #endif 273 struct sockaddr_in *me4, *msk4, *peer4; 274 struct sockaddr_storage ssme, sspeer, ssmsk; 275 int res, saved_errno; 276 277 ncprange_getsa(&addr->ifa, &ssme, &ssmsk); 278 ncpaddr_getsa(&addr->peer, &sspeer); 279 res = 0; 280 281 switch (ncprange_family(&addr->ifa)) { 282 case AF_INET: 283 memset(&ifra, '\0', sizeof ifra); 284 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1); 285 286 me4 = (struct sockaddr_in *)&ifra.ifra_addr; 287 memcpy(me4, &ssme, sizeof *me4); 288 289 msk4 = (struct sockaddr_in *)&ifra.ifra_mask; 290 memcpy(msk4, &ssmsk, sizeof *msk4); 291 292 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr; 293 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) { 294 peer4->sin_family = AF_INET; 295 peer4->sin_len = sizeof(*peer4); 296 peer4->sin_addr.s_addr = INADDR_NONE; 297 } else 298 memcpy(peer4, &sspeer, sizeof *peer4); 299 300 res = ID0ioctl(s, SIOCAIFADDR, &ifra); 301 saved_errno = errno; 302 if (log_IsKept(LogDEBUG)) { 303 char buf[NCP_ASCIIBUFFERSIZE]; 304 305 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa)); 306 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n", 307 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res); 308 } 309 break; 310 311 #ifndef NOINET6 312 case AF_INET6: 313 memset(&ifra6, '\0', sizeof ifra6); 314 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1); 315 316 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr); 317 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask); 318 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 319 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC; 320 else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128, 321 sizeof in6mask128) == 0) 322 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr); 323 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; 324 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; 325 326 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6); 327 saved_errno = errno; 328 break; 329 #endif 330 } 331 332 if (res == -1) { 333 char dst[NCP_ASCIIBUFFERSIZE]; 334 const char *end = 335 #ifndef NOINET6 336 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" : 337 #endif 338 ""; 339 340 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 341 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n", 342 end, ncprange_ntoa(&addr->ifa), strerror(saved_errno)); 343 else { 344 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer)); 345 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n", 346 end, ncprange_ntoa(&addr->ifa), dst, strerror(saved_errno)); 347 } 348 } 349 350 return res != -1; 351 } 352 353 int 354 iface_Name(struct iface *iface, const char *name) 355 { 356 struct ifreq ifr; 357 int s; 358 char *newname; 359 360 if ((newname = strdup(name)) == NULL) { 361 log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno)); 362 return 0; 363 } 364 365 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { 366 log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno)); 367 free(newname); 368 return 0; 369 } 370 371 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name)); 372 ifr.ifr_data = newname; 373 if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 374 log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n", 375 name, newname, strerror(errno)); 376 free(newname); 377 return 0; 378 } 379 380 free(iface->name); 381 iface->name = newname; 382 383 return 1; 384 } 385 386 int 387 iface_Descr(struct cmdargs const *arg) 388 { 389 struct ifreq ifr; 390 struct iface *iface; 391 size_t sz, len; 392 int s, n, ifdescr_maxlen; 393 char *descr; 394 395 sz = sizeof(int); 396 if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) { 397 log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno)); 398 return 1; 399 } 400 401 if (ifdescr_maxlen < 1) { 402 log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n"); 403 return 1; 404 } 405 406 sz = sizeof(char) * ifdescr_maxlen; 407 if ((descr = malloc(sz)) == NULL) { 408 log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno)); 409 return 1; 410 } 411 412 *descr = '\0'; 413 n = arg->argn; 414 while (n < arg->argc) { 415 if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz) 416 break; 417 if ((len = strlcat(descr, arg->argv[n], sz)) >= sz) 418 break; 419 ++n; 420 } 421 if (len >= sz) { 422 log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n", 423 ifdescr_maxlen-1); 424 free(descr); 425 return 1; 426 } 427 428 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { 429 log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno)); 430 free(descr); 431 return 1; 432 } 433 434 iface = arg->bundle->iface; 435 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name)); 436 ifr.ifr_buffer.length = strlen(descr) + 1; 437 ifr.ifr_buffer.buffer = descr; 438 if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) { 439 log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n", 440 descr, strerror(errno)); 441 free(descr); 442 return 1; 443 } 444 445 free(iface->descr); 446 iface->descr = descr; 447 448 return 0; 449 } 450 451 void 452 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how) 453 { 454 int af, inskip, in6skip, s4 = -1, s6 = -1, *s; 455 unsigned n; 456 457 if (iface->addrs) { 458 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1; 459 460 for (n = 0; n < iface->addrs; n++) { 461 af = ncprange_family(&iface->addr[n].ifa); 462 if (family == 0 || family == af) { 463 if (!iface->addr[n].system && (how & IFACE_SYSTEM)) 464 continue; 465 switch (af) { 466 case AF_INET: 467 if (inskip) { 468 inskip = 0; 469 continue; 470 } 471 s = &s4; 472 break; 473 474 #ifndef NOINET6 475 case AF_INET6: 476 if (in6skip) { 477 in6skip = 0; 478 continue; 479 } 480 s = &s6; 481 break; 482 #endif 483 default: 484 continue; 485 } 486 487 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1) 488 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno)); 489 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) { 490 ncp_IfaceAddrDeleted(ncp, iface->addr + n); 491 bcopy(iface->addr + n + 1, iface->addr + n, 492 (iface->addrs - n - 1) * sizeof *iface->addr); 493 iface->addrs--; 494 n--; 495 } 496 } 497 } 498 499 /* Don't bother realloc()ing - we have little to gain */ 500 501 if (s4) 502 close(s4); 503 if (s6) 504 close(s6); 505 } 506 } 507 508 int 509 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa, 510 const struct ncpaddr *peer, int how) 511 { 512 int af, removed, s; 513 unsigned n; 514 struct ncpaddr ncplocal; 515 struct iface_addr *addr, newaddr; 516 517 af = ncprange_family(ifa); 518 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) { 519 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno)); 520 return 0; 521 } 522 ncprange_getaddr(ifa, &ncplocal); 523 524 for (n = 0; n < iface->addrs; n++) { 525 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) || 526 ncpaddr_equal(&iface->addr[n].peer, peer)) { 527 /* Replace this sockaddr */ 528 if (!(how & IFACE_FORCE_ADD)) { 529 close(s); 530 return 0; /* errno = EEXIST; */ 531 } 532 533 if (ncprange_equal(&iface->addr[n].ifa, ifa) && 534 ncpaddr_equal(&iface->addr[n].peer, peer)) { 535 close(s); 536 ncp_IfaceAddrAdded(ncp, iface->addr + n); 537 return 1; /* Already there */ 538 } 539 540 removed = iface_addr_Zap(iface->name, iface->addr + n, s); 541 if (removed) 542 ncp_IfaceAddrDeleted(ncp, iface->addr + n); 543 ncprange_copy(&iface->addr[n].ifa, ifa); 544 ncpaddr_copy(&iface->addr[n].peer, peer); 545 if (!iface_addr_Add(iface->name, iface->addr + n, s)) { 546 if (removed) { 547 bcopy(iface->addr + n + 1, iface->addr + n, 548 (iface->addrs - n - 1) * sizeof *iface->addr); 549 iface->addrs--; 550 n--; 551 } 552 close(s); 553 return 0; 554 } 555 close(s); 556 ncp_IfaceAddrAdded(ncp, iface->addr + n); 557 return 1; 558 } 559 } 560 561 addr = (struct iface_addr *)realloc 562 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]); 563 if (addr == NULL) { 564 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno)); 565 close(s); 566 return 0; 567 } 568 iface->addr = addr; 569 570 ncprange_copy(&newaddr.ifa, ifa); 571 ncpaddr_copy(&newaddr.peer, peer); 572 newaddr.system = !!(how & IFACE_SYSTEM); 573 if (!iface_addr_Add(iface->name, &newaddr, s)) { 574 close(s); 575 return 0; 576 } 577 578 if (how & IFACE_ADD_FIRST) { 579 /* Stuff it at the start of our list */ 580 n = 0; 581 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr); 582 } else 583 n = iface->addrs; 584 585 iface->addrs++; 586 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr)); 587 588 close(s); 589 ncp_IfaceAddrAdded(ncp, iface->addr + n); 590 591 return 1; 592 } 593 594 int 595 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del) 596 { 597 struct ncpaddr found; 598 unsigned n; 599 int res, s; 600 601 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) { 602 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno)); 603 return 0; 604 } 605 606 for (n = res = 0; n < iface->addrs; n++) { 607 ncprange_getaddr(&iface->addr[n].ifa, &found); 608 if (ncpaddr_equal(&found, del)) { 609 if (iface_addr_Zap(iface->name, iface->addr + n, s)) { 610 ncp_IfaceAddrDeleted(ncp, iface->addr + n); 611 bcopy(iface->addr + n + 1, iface->addr + n, 612 (iface->addrs - n - 1) * sizeof *iface->addr); 613 iface->addrs--; 614 res = 1; 615 } 616 break; 617 } 618 } 619 620 close(s); 621 622 return res; 623 } 624 625 #define IFACE_ADDFLAGS 1 626 #define IFACE_DELFLAGS 2 627 628 static int 629 iface_ChangeFlags(const char *ifname, int flags, int how) 630 { 631 struct ifreq ifrq; 632 int s, new_flags; 633 634 s = ID0socket(PF_INET, SOCK_DGRAM, 0); 635 if (s < 0) { 636 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno)); 637 return 0; 638 } 639 640 memset(&ifrq, '\0', sizeof ifrq); 641 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1); 642 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; 643 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { 644 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n", 645 strerror(errno)); 646 close(s); 647 return 0; 648 } 649 #ifdef __FreeBSD__ 650 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16); 651 #else 652 new_flags = ifrq.ifr_flags & 0xffff; 653 #endif 654 655 if (how == IFACE_ADDFLAGS) 656 new_flags |= flags; 657 else 658 new_flags &= ~flags; 659 ifrq.ifr_flags = new_flags & 0xffff; 660 #ifdef __FreeBSD__ 661 ifrq.ifr_flagshigh = new_flags >> 16; 662 #endif 663 664 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { 665 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n", 666 strerror(errno)); 667 close(s); 668 return 0; 669 } 670 close(s); 671 672 return 1; /* Success */ 673 } 674 675 int 676 iface_SetFlags(const char *ifname, int flags) 677 { 678 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS); 679 } 680 681 int 682 iface_ClearFlags(const char *ifname, int flags) 683 { 684 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS); 685 } 686 687 void 688 iface_Free(struct iface *iface) 689 { 690 free(iface->name); 691 free(iface->descr); 692 free(iface->addr); 693 free(iface); 694 } 695 696 void 697 iface_Destroy(struct iface *iface) 698 { 699 struct ifreq ifr; 700 int s; 701 702 if (iface != NULL) { 703 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { 704 log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno)); 705 } else { 706 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name)); 707 if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0) 708 log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n", 709 iface->name, strerror(errno)); 710 } 711 iface_Free(iface); 712 } 713 } 714 715 #define if_entry(x) { IFF_##x, #x } 716 717 struct { 718 int flag; 719 const char *value; 720 } if_flags[] = { 721 if_entry(UP), 722 if_entry(BROADCAST), 723 if_entry(DEBUG), 724 if_entry(LOOPBACK), 725 if_entry(POINTOPOINT), 726 if_entry(RUNNING), 727 if_entry(NOARP), 728 if_entry(PROMISC), 729 if_entry(ALLMULTI), 730 if_entry(OACTIVE), 731 if_entry(SIMPLEX), 732 if_entry(LINK0), 733 if_entry(LINK1), 734 if_entry(LINK2), 735 if_entry(MULTICAST), 736 { 0, "???" } 737 }; 738 739 int 740 iface_Show(struct cmdargs const *arg) 741 { 742 struct ncpaddr ncpaddr; 743 struct iface *iface = arg->bundle->iface, *current; 744 unsigned f; 745 int flags; 746 #ifndef NOINET6 747 int scopeid, width; 748 #endif 749 struct in_addr mask; 750 751 current = iface_Create(iface->name); 752 flags = iface->flags = current->flags; 753 iface_Free(current); 754 755 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index); 756 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++) 757 if ((if_flags[f].flag & flags)) { 758 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",", 759 if_flags[f].value); 760 flags &= ~if_flags[f].flag; 761 } 762 763 #if 0 764 if (flags) 765 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",", 766 flags); 767 #endif 768 769 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu, 770 iface->addrs, iface->addrs == 1 ? "" : "es"); 771 772 for (f = 0; f < iface->addrs; f++) { 773 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr); 774 switch (ncprange_family(&iface->addr[f].ifa)) { 775 case AF_INET: 776 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr)); 777 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC) 778 prompt_Printf(arg->prompt, "255.255.255.255"); 779 else 780 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer)); 781 ncprange_getip4mask(&iface->addr[f].ifa, &mask); 782 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr)); 783 break; 784 785 #ifndef NOINET6 786 case AF_INET6: 787 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr)); 788 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC) 789 prompt_Printf(arg->prompt, " --> %s", 790 ncpaddr_ntoa(&iface->addr[f].peer)); 791 ncprange_getwidth(&iface->addr[f].ifa, &width); 792 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC) 793 prompt_Printf(arg->prompt, " prefixlen %d", width); 794 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1) 795 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid); 796 break; 797 #endif 798 } 799 prompt_Printf(arg->prompt, "\n"); 800 } 801 802 return 0; 803 } 804 805 void 806 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX]) 807 { 808 char *wp; 809 int rtax; 810 811 wp = (char *)(ifam + 1); 812 813 for (rtax = 0; rtax < RTAX_MAX; rtax++) 814 if (ifam->ifam_addrs & (1 << rtax)) { 815 sa[rtax] = (struct sockaddr *)wp; 816 wp += ROUNDUP(sa[rtax]->sa_len); 817 } else 818 sa[rtax] = NULL; 819 } 820