networking/libiproute/ipaddress.c

   1 /*
   2  * ipaddress.c          "ip address".
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  *
  11  * Changes:
  12  *      Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
  13  */
  14
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18 #include <syslog.h>
  19 #include <fcntl.h>
  20 #include <sys/ioctl.h>
  21 #include <sys/socket.h>
  22 #include <sys/ioctl.h>
  23 #include <netinet/in.h>
  24 #include <arpa/inet.h>
  25 #include <string.h>
  26 #include <fnmatch.h>
  27
  28 #include <linux/netdevice.h>
  29 #include <linux/if_arp.h>
  30 #include <linux/sockios.h>
  31
  32 #include "rt_names.h"
  33 #include "utils.h"
  34 #include "ll_map.h"
  35 #include "ip_common.h"
  36
  37 #include "busybox.h"
  38
  39 static struct
  40 {
  41         int ifindex;
  42         int family;
  43         int oneline;
  44         int showqueue;
  45         inet_prefix pfx;
  46         int scope, scopemask;
  47         int flags, flagmask;
  48         int up;
  49         char *label;
  50         struct rtnl_handle *rth;
  51 } filter;
  52
  53 void print_link_flags(FILE *fp, unsigned flags, unsigned mdown)
  54 {
  55         fprintf(fp, "<");
  56         flags &= ~IFF_RUNNING;
  57 #define _PF(f) if (flags&IFF_##f) { \
  58                   flags &= ~IFF_##f ; \
  59                   fprintf(fp, #f "%s", flags ? "," : ""); }
  60         _PF(LOOPBACK);
  61         _PF(BROADCAST);
  62         _PF(POINTOPOINT);
  63         _PF(MULTICAST);
  64         _PF(NOARP);
  65 #if 0
  66         _PF(ALLMULTI);
  67         _PF(PROMISC);
  68         _PF(MASTER);
  69         _PF(SLAVE);
  70         _PF(DEBUG);
  71         _PF(DYNAMIC);
  72         _PF(AUTOMEDIA);
  73         _PF(PORTSEL);
  74         _PF(NOTRAILERS);
  75 #endif
  76         _PF(UP);
  77 #undef _PF
  78         if (flags)
  79                 fprintf(fp, "%x", flags);
  80         if (mdown)
  81                 fprintf(fp, ",M-DOWN");
  82         fprintf(fp, "> ");
  83 }
  84
  85 static void print_queuelen(char *name)
  86 {
  87         struct ifreq ifr;
  88         int s;
  89
  90         s = socket(AF_INET, SOCK_STREAM, 0);
  91         if (s < 0)
  92                 return;
  93
  94         memset(&ifr, 0, sizeof(ifr));
  95         strcpy(ifr.ifr_name, name);
  96         if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
  97                 perror("SIOCGIFXQLEN");
  98                 close(s);
  99                 return;
 100         }
 101         close(s);
 102
 103         if (ifr.ifr_qlen)
 104                 printf("qlen %d", ifr.ifr_qlen);
 105 }
 106
 107 static int print_linkinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 108 {
 109         FILE *fp = (FILE*)arg;
 110         struct ifinfomsg *ifi = NLMSG_DATA(n);
 111         struct rtattr * tb[IFLA_MAX+1];
 112         int len = n->nlmsg_len;
 113         unsigned m_flag = 0;
 114
 115         if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
 116                 return 0;
 117
 118         len -= NLMSG_LENGTH(sizeof(*ifi));
 119         if (len < 0)
 120                 return -1;
 121
 122         if (filter.ifindex && ifi->ifi_index != filter.ifindex)
 123                 return 0;
 124         if (filter.up && !(ifi->ifi_flags&IFF_UP))
 125                 return 0;
 126
 127         memset(tb, 0, sizeof(tb));
 128         parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
 129         if (tb[IFLA_IFNAME] == NULL) {
 130                 error_msg("nil ifname");
 131                 return -1;
 132         }
 133         if (filter.label &&
 134             (!filter.family || filter.family == AF_PACKET) &&
 135             fnmatch(filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0))
 136                 return 0;
 137
 138         if (n->nlmsg_type == RTM_DELLINK)
 139                 fprintf(fp, "Deleted ");
 140
 141         fprintf(fp, "%d: %s", ifi->ifi_index,
 142                 tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>");
 143
 144         if (tb[IFLA_LINK]) {
 145                 SPRINT_BUF(b1);
 146                 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
 147                 if (iflink == 0)
 148                         fprintf(fp, "@NONE: ");
 149                 else {
 150                         fprintf(fp, "@%s: ", ll_idx_n2a(iflink, b1));
 151                         m_flag = ll_index_to_flags(iflink);
 152                         m_flag = !(m_flag & IFF_UP);
 153                 }
 154         } else {
 155                 fprintf(fp, ": ");
 156         }
 157         print_link_flags(fp, ifi->ifi_flags, m_flag);
 158
 159         if (tb[IFLA_MTU])
 160                 fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
 161         if (tb[IFLA_QDISC])
 162                 fprintf(fp, "qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
 163 #ifdef IFLA_MASTER
 164         if (tb[IFLA_MASTER]) {
 165                 SPRINT_BUF(b1);
 166                 fprintf(fp, "master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
 167         }
 168 #endif
 169         if (filter.showqueue)
 170                 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
 171
 172         if (!filter.family || filter.family == AF_PACKET) {
 173                 SPRINT_BUF(b1);
 174                 fprintf(fp, "%s", _SL_);
 175                 fprintf(fp, "    link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
 176
 177                 if (tb[IFLA_ADDRESS]) {
 178                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
 179                                                       RTA_PAYLOAD(tb[IFLA_ADDRESS]),
 180                                                       ifi->ifi_type,
 181                                                       b1, sizeof(b1)));
 182                 }
 183                 if (tb[IFLA_BROADCAST]) {
 184                         if (ifi->ifi_flags&IFF_POINTOPOINT)
 185                                 fprintf(fp, " peer ");
 186                         else
 187                                 fprintf(fp, " brd ");
 188                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
 189                                                       RTA_PAYLOAD(tb[IFLA_BROADCAST]),
 190                                                       ifi->ifi_type,
 191                                                       b1, sizeof(b1)));
 192                 }
 193         }
 194         fprintf(fp, "\n");
 195         fflush(fp);
 196         return 0;
 197 }
 198
 199 static int print_addrinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 200 {
 201         FILE *fp = (FILE*)arg;
 202         struct ifaddrmsg *ifa = NLMSG_DATA(n);
 203         int len = n->nlmsg_len;
 204         struct rtattr * rta_tb[IFA_MAX+1];
 205         char abuf[256];
 206         SPRINT_BUF(b1);
 207
 208         if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
 209                 return 0;
 210         len -= NLMSG_LENGTH(sizeof(*ifa));
 211         if (len < 0) {
 212                 error_msg("wrong nlmsg len %d", len);
 213                 return -1;
 214         }
 215
 216         memset(rta_tb, 0, sizeof(rta_tb));
 217         parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
 218
 219         if (!rta_tb[IFA_LOCAL])
 220                 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
 221         if (!rta_tb[IFA_ADDRESS])
 222                 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
 223
 224         if (filter.ifindex && filter.ifindex != ifa->ifa_index)
 225                 return 0;
 226         if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 227                 return 0;
 228         if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 229                 return 0;
 230         if (filter.label) {
 231                 const char *label;
 232                 if (rta_tb[IFA_LABEL])
 233                         label = RTA_DATA(rta_tb[IFA_LABEL]);
 234                 else
 235                         label = ll_idx_n2a(ifa->ifa_index, b1);
 236                 if (fnmatch(filter.label, label, 0) != 0)
 237                         return 0;
 238         }
 239         if (filter.pfx.family) {
 240                 if (rta_tb[IFA_LOCAL]) {
 241                         inet_prefix dst;
 242                         memset(&dst, 0, sizeof(dst));
 243                         dst.family = ifa->ifa_family;
 244                         memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
 245                         if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 246                                 return 0;
 247                 }
 248         }
 249
 250         if (n->nlmsg_type == RTM_DELADDR)
 251                 fprintf(fp, "Deleted ");
 252
 253         if (filter.oneline)
 254                 fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
 255         if (ifa->ifa_family == AF_INET)
 256                 fprintf(fp, "    inet ");
 257         else if (ifa->ifa_family == AF_INET6)
 258                 fprintf(fp, "    inet6 ");
 259         else
 260                 fprintf(fp, "    family %d ", ifa->ifa_family);
 261
 262         if (rta_tb[IFA_LOCAL]) {
 263                 fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
 264                                               RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 265                                               RTA_DATA(rta_tb[IFA_LOCAL]),
 266                                               abuf, sizeof(abuf)));
 267
 268                 if (rta_tb[IFA_ADDRESS] == NULL ||
 269                     memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
 270                         fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 271                 } else {
 272                         fprintf(fp, " peer %s/%d ",
 273                                 rt_addr_n2a(ifa->ifa_family,
 274                                             RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 275                                             RTA_DATA(rta_tb[IFA_ADDRESS]),
 276                                             abuf, sizeof(abuf)),
 277                                 ifa->ifa_prefixlen);
 278                 }
 279         }
 280
 281         if (rta_tb[IFA_BROADCAST]) {
 282                 fprintf(fp, "brd %s ",
 283                         rt_addr_n2a(ifa->ifa_family,
 284                                     RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 285                                     RTA_DATA(rta_tb[IFA_BROADCAST]),
 286                                     abuf, sizeof(abuf)));
 287         }
 288         if (rta_tb[IFA_ANYCAST]) {
 289                 fprintf(fp, "any %s ",
 290                         rt_addr_n2a(ifa->ifa_family,
 291                                     RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 292                                     RTA_DATA(rta_tb[IFA_ANYCAST]),
 293                                     abuf, sizeof(abuf)));
 294         }
 295         fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
 296         if (ifa->ifa_flags&IFA_F_SECONDARY) {
 297                 ifa->ifa_flags &= ~IFA_F_SECONDARY;
 298                 fprintf(fp, "secondary ");
 299         }
 300         if (ifa->ifa_flags&IFA_F_TENTATIVE) {
 301                 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
 302                 fprintf(fp, "tentative ");
 303         }
 304         if (ifa->ifa_flags&IFA_F_DEPRECATED) {
 305                 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
 306                 fprintf(fp, "deprecated ");
 307         }
 308         if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
 309                 fprintf(fp, "dynamic ");
 310         } else
 311                 ifa->ifa_flags &= ~IFA_F_PERMANENT;
 312         if (ifa->ifa_flags)
 313                 fprintf(fp, "flags %02x ", ifa->ifa_flags);
 314         if (rta_tb[IFA_LABEL])
 315                 fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
 316         if (rta_tb[IFA_CACHEINFO]) {
 317                 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
 318                 char buf[128];
 319                 fprintf(fp, "%s", _SL_);
 320                 if (ci->ifa_valid == 0xFFFFFFFFU)
 321                         sprintf(buf, "valid_lft forever");
 322                 else
 323                         sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
 324                 if (ci->ifa_prefered == 0xFFFFFFFFU)
 325                         sprintf(buf+strlen(buf), " preferred_lft forever");
 326                 else
 327                         sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
 328                 fprintf(fp, "       %s", buf);
 329         }
 330         fprintf(fp, "\n");
 331         fflush(fp);
 332         return 0;
 333 }
 334
 335
 336 struct nlmsg_list
 337 {
 338         struct nlmsg_list *next;
 339         struct nlmsghdr   h;
 340 };
 341
 342 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
 343 {
 344         for ( ;ainfo ;  ainfo = ainfo->next) {
 345                 struct nlmsghdr *n = &ainfo->h;
 346                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 347
 348                 if (n->nlmsg_type != RTM_NEWADDR)
 349                         continue;
 350
 351                 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
 352                         return -1;
 353
 354                 if (ifa->ifa_index != ifindex ||
 355                     (filter.family && filter.family != ifa->ifa_family))
 356                         continue;
 357
 358                 print_addrinfo(NULL, n, fp);
 359         }
 360         return 0;
 361 }
 362
 363
 364 static int store_nlmsg(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 365 {
 366         struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
 367         struct nlmsg_list *h;
 368         struct nlmsg_list **lp;
 369
 370         h = malloc(n->nlmsg_len+sizeof(void*));
 371         if (h == NULL)
 372                 return -1;
 373
 374         memcpy(&h->h, n, n->nlmsg_len);
 375         h->next = NULL;
 376
 377         for (lp = linfo; *lp; lp = &(*lp)->next) /* NOTHING */;
 378         *lp = h;
 379
 380         ll_remember_index(who, n, NULL);
 381         return 0;
 382 }
 383
 384 static void ipaddr_reset_filter(int _oneline)
 385 {
 386         memset(&filter, 0, sizeof(filter));
 387         filter.oneline = _oneline;
 388 }
 389
 390 extern int ipaddr_list(int argc, char **argv)
 391 {
 392         const char *option[] = { "to", "scope", "up", "label", "dev", 0 };
 393         struct nlmsg_list *linfo = NULL;
 394         struct nlmsg_list *ainfo = NULL;
 395         struct nlmsg_list *l;
 396         struct rtnl_handle rth;
 397         char *filter_dev = NULL;
 398         int no_link = 0;
 399
 400         ipaddr_reset_filter(oneline);
 401         filter.showqueue = 1;
 402
 403         if (filter.family == AF_UNSPEC)
 404                 filter.family = preferred_family;
 405
 406         while (argc > 0) {
 407                 const unsigned short option_num = compare_string_array(option, *argv);
 408                 switch (option_num) {
 409                         case 0: /* to */
 410                                 NEXT_ARG();
 411                                 get_prefix(&filter.pfx, *argv, filter.family);
 412                                 if (filter.family == AF_UNSPEC) {
 413                                         filter.family = filter.pfx.family;
 414                                 }
 415                                 break;
 416                         case 1: /* scope */
 417                         {
 418                                 int scope = 0;
 419                                 NEXT_ARG();
 420                                 filter.scopemask = -1;
 421                                 if (rtnl_rtscope_a2n(&scope, *argv)) {
 422                                         if (strcmp(*argv, "all") != 0) {
 423                                                 invarg("invalid \"scope\"\n", *argv);
 424                                         }
 425                                         scope = RT_SCOPE_NOWHERE;
 426                                         filter.scopemask = 0;
 427                                 }
 428                                 filter.scope = scope;
 429                                 break;
 430                         }
 431                         case 2: /* up */
 432                                 filter.up = 1;
 433                                 break;
 434                         case 3: /* label */
 435                                 NEXT_ARG();
 436                                 filter.label = *argv;
 437                                 break;
 438                         case 4: /* dev */
 439                                 NEXT_ARG();
 440                         default:
 441                                 if (filter_dev) {
 442                                         duparg2("dev", *argv);
 443                                 }
 444                                 filter_dev = *argv;
 445                 }
 446                 argv++;
 447                 argc--;
 448         }
 449
 450         if (rtnl_open(&rth, 0) < 0)
 451                 exit(1);
 452
 453         if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
 454                 perror_msg_and_die("Cannot send dump request");
 455         }
 456
 457         if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
 458                 error_msg_and_die("Dump terminated");
 459         }
 460
 461         if (filter_dev) {
 462                 filter.ifindex = ll_name_to_index(filter_dev);
 463                 if (filter.ifindex <= 0) {
 464                         error_msg("Device \"%s\" does not exist.", filter_dev);
 465                         return -1;
 466                 }
 467         }
 468
 469         if (filter.family != AF_PACKET) {
 470                 if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 471                         perror_msg_and_die("Cannot send dump request");
 472                 }
 473
 474                 if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
 475                         error_msg_and_die("Dump terminated");
 476                 }
 477         }
 478
 479
 480         if (filter.family && filter.family != AF_PACKET) {
 481                 struct nlmsg_list **lp;
 482                 lp=&linfo;
 483
 484                 if (filter.oneline)
 485                         no_link = 1;
 486
 487                 while ((l=*lp)!=NULL) {
 488                         int ok = 0;
 489                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 490                         struct nlmsg_list *a;
 491
 492                         for (a=ainfo; a; a=a->next) {
 493                                 struct nlmsghdr *n = &a->h;
 494                                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 495
 496                                 if (ifa->ifa_index != ifi->ifi_index ||
 497                                     (filter.family && filter.family != ifa->ifa_family))
 498                                         continue;
 499                                 if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 500                                         continue;
 501                                 if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 502                                         continue;
 503                                 if (filter.pfx.family || filter.label) {
 504                                         struct rtattr *tb[IFA_MAX+1];
 505                                         memset(tb, 0, sizeof(tb));
 506                                         parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
 507                                         if (!tb[IFA_LOCAL])
 508                                                 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 509
 510                                         if (filter.pfx.family && tb[IFA_LOCAL]) {
 511                                                 inet_prefix dst;
 512                                                 memset(&dst, 0, sizeof(dst));
 513                                                 dst.family = ifa->ifa_family;
 514                                                 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
 515                                                 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 516                                                         continue;
 517                                         }
 518                                         if (filter.label) {
 519                                                 SPRINT_BUF(b1);
 520                                                 const char *label;
 521                                                 if (tb[IFA_LABEL])
 522                                                         label = RTA_DATA(tb[IFA_LABEL]);
 523                                                 else
 524                                                         label = ll_idx_n2a(ifa->ifa_index, b1);
 525                                                 if (fnmatch(filter.label, label, 0) != 0)
 526                                                         continue;
 527                                         }
 528                                 }
 529
 530                                 ok = 1;
 531                                 break;
 532                         }
 533                         if (!ok)
 534                                 *lp = l->next;
 535                         else
 536                                 lp = &l->next;
 537                 }
 538         }
 539
 540         for (l=linfo; l; l = l->next) {
 541                 if (no_link || print_linkinfo(NULL, &l->h, stdout) == 0) {
 542                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 543                         if (filter.family != AF_PACKET)
 544                                 print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
 545                 }
 546                 fflush(stdout);
 547         }
 548
 549         exit(0);
 550 }
 551
 552 static int default_scope(inet_prefix *lcl)
 553 {
 554         if (lcl->family == AF_INET) {
 555                 if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
 556                         return RT_SCOPE_HOST;
 557         }
 558         return 0;
 559 }
 560
 561 static int ipaddr_modify(int cmd, int argc, char **argv)
 562 {
 563         const char *option[] = { "peer", "remote", "broadcast", "brd",
 564                 "anycast", "scope", "dev", "label", "local", 0 };
 565         struct rtnl_handle rth;
 566         struct {
 567                 struct nlmsghdr         n;
 568                 struct ifaddrmsg        ifa;
 569                 char                    buf[256];
 570         } req;
 571         char  *d = NULL;
 572         char  *l = NULL;
 573         inet_prefix lcl;
 574         inet_prefix peer;
 575         int local_len = 0;
 576         int peer_len = 0;
 577         int brd_len = 0;
 578         int any_len = 0;
 579         int scoped = 0;
 580
 581         memset(&req, 0, sizeof(req));
 582
 583         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
 584         req.n.nlmsg_flags = NLM_F_REQUEST;
 585         req.n.nlmsg_type = cmd;
 586         req.ifa.ifa_family = preferred_family;
 587
 588         while (argc > 0) {
 589                 const unsigned short option_num = compare_string_array(option, *argv);
 590                 switch (option_num) {
 591                         case 0: /* peer */
 592                         case 1: /* remote */
 593                                 NEXT_ARG();
 594
 595                                 if (peer_len) {
 596                                         duparg("peer", *argv);
 597                                 }
 598                                 get_prefix(&peer, *argv, req.ifa.ifa_family);
 599                                 peer_len = peer.bytelen;
 600                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 601                                         req.ifa.ifa_family = peer.family;
 602                                 }
 603                                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
 604                                 req.ifa.ifa_prefixlen = peer.bitlen;
 605                                 break;
 606                         case 2: /* broadcast */
 607                         case 3: /* brd */
 608                         {
 609                                 inet_prefix addr;
 610                                 NEXT_ARG();
 611                                 if (brd_len) {
 612                                         duparg("broadcast", *argv);
 613                                 }
 614                                 if (strcmp(*argv, "+") == 0) {
 615                                         brd_len = -1;
 616                                 }
 617                                 else if (strcmp(*argv, "-") == 0) {
 618                                         brd_len = -2;
 619                                 } else {
 620                                         get_addr(&addr, *argv, req.ifa.ifa_family);
 621                                         if (req.ifa.ifa_family == AF_UNSPEC)
 622                                                 req.ifa.ifa_family = addr.family;
 623                                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
 624                                         brd_len = addr.bytelen;
 625                                 }
 626                                 break;
 627                         }
 628                         case 4: /* anycast */
 629                         {
 630                                 inet_prefix addr;
 631                                 NEXT_ARG();
 632                                 if (any_len) {
 633                                         duparg("anycast", *argv);
 634                                 }
 635                                 get_addr(&addr, *argv, req.ifa.ifa_family);
 636                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 637                                         req.ifa.ifa_family = addr.family;
 638                                 }
 639                                 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
 640                                 any_len = addr.bytelen;
 641                                 break;
 642                         }
 643                         case 5: /* scope */
 644                         {
 645                                 int scope = 0;
 646                                 NEXT_ARG();
 647                                 if (rtnl_rtscope_a2n(&scope, *argv)) {
 648                                         invarg(*argv, "invalid scope value.");
 649                                 }
 650                                 req.ifa.ifa_scope = scope;
 651                                 scoped = 1;
 652                                 break;
 653                         }
 654                         case 6: /* dev */
 655                                 NEXT_ARG();
 656                                 d = *argv;
 657                                 break;
 658                         case 7: /* label */
 659                                 NEXT_ARG();
 660                                 l = *argv;
 661                                 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
 662                                 break;
 663                         case 8: /* local */
 664                                 NEXT_ARG();
 665                         default:
 666                                 if (local_len) {
 667                                         duparg2("local", *argv);
 668                                 }
 669                                 get_prefix(&lcl, *argv, req.ifa.ifa_family);
 670                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 671                                         req.ifa.ifa_family = lcl.family;
 672                                 }
 673                                 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
 674                                 local_len = lcl.bytelen;
 675                 }
 676                 argc--;
 677                 argv++;
 678         }
 679
 680         if (d == NULL) {
 681                 error_msg("Not enough information: \"dev\" argument is required.");
 682                 return -1;
 683         }
 684         if (l && matches(d, l) != 0) {
 685                 error_msg_and_die("\"dev\" (%s) must match \"label\" (%s).", d, l);
 686         }
 687
 688         if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
 689                 peer = lcl;
 690                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
 691         }
 692         if (req.ifa.ifa_prefixlen == 0)
 693                 req.ifa.ifa_prefixlen = lcl.bitlen;
 694
 695         if (brd_len < 0 && cmd != RTM_DELADDR) {
 696                 inet_prefix brd;
 697                 int i;
 698                 if (req.ifa.ifa_family != AF_INET) {
 699                         error_msg("Broadcast can be set only for IPv4 addresses");
 700                         return -1;
 701                 }
 702                 brd = peer;
 703                 if (brd.bitlen <= 30) {
 704                         for (i=31; i>=brd.bitlen; i--) {
 705                                 if (brd_len == -1)
 706                                         brd.data[0] |= htonl(1<<(31-i));
 707                                 else
 708                                         brd.data[0] &= ~htonl(1<<(31-i));
 709                         }
 710                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
 711                         brd_len = brd.bytelen;
 712                 }
 713         }
 714         if (!scoped && cmd != RTM_DELADDR)
 715                 req.ifa.ifa_scope = default_scope(&lcl);
 716
 717         if (rtnl_open(&rth, 0) < 0)
 718                 exit(1);
 719
 720         ll_init_map(&rth);
 721
 722         if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
 723                 error_msg("Cannot find device \"%s\"", d);
 724                 return -1;
 725         }
 726
 727         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 728                 exit(2);
 729
 730         exit(0);
 731 }
 732
 733 extern int do_ipaddr(int argc, char **argv)
 734 {
 735         const char *commands[] = { "add", "delete", "list", "show", "lst", 0 };
 736         unsigned short command_num = 2;
 737
 738         if (*argv) {
 739                 command_num = compare_string_array(commands, *argv);
 740         }
 741         switch (command_num) {
 742                 case 0: /* add */
 743                         return ipaddr_modify(RTM_NEWADDR, argc-1, argv+1);
 744                 case 1: /* delete */
 745                         return ipaddr_modify(RTM_DELADDR, argc-1, argv+1);
 746                 case 2: /* list */
 747                 case 3: /* show */
 748                 case 4: /* lst */
 749                         return ipaddr_list(argc-1, argv+1);
 750         }
 751         error_msg_and_die("Unknown command %s", *argv);
 752 }