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 #define sysinfo kernel_sysinfo
  29 #include <linux/netdevice.h>
  30 #include <linux/if_arp.h>
  31 #include <linux/sockios.h>
  32 #undef sysinfo
  33
  34 #include "rt_names.h"
  35 #include "utils.h"
  36 #include "ll_map.h"
  37 #include "ip_common.h"
  38
  39 #include "busybox.h"
  40
  41 static struct
  42 {
  43         int ifindex;
  44         int family;
  45         int oneline;
  46         int showqueue;
  47         inet_prefix pfx;
  48         int scope, scopemask;
  49         int flags, flagmask;
  50         int up;
  51         char *label;
  52         struct rtnl_handle *rth;
  53 } filter;
  54
  55 void print_link_flags(FILE *fp, unsigned flags, unsigned mdown)
  56 {
  57         fprintf(fp, "<");
  58         flags &= ~IFF_RUNNING;
  59 #define _PF(f) if (flags&IFF_##f) { \
  60                   flags &= ~IFF_##f ; \
  61                   fprintf(fp, #f "%s", flags ? "," : ""); }
  62         _PF(LOOPBACK);
  63         _PF(BROADCAST);
  64         _PF(POINTOPOINT);
  65         _PF(MULTICAST);
  66         _PF(NOARP);
  67 #if 0
  68         _PF(ALLMULTI);
  69         _PF(PROMISC);
  70         _PF(MASTER);
  71         _PF(SLAVE);
  72         _PF(DEBUG);
  73         _PF(DYNAMIC);
  74         _PF(AUTOMEDIA);
  75         _PF(PORTSEL);
  76         _PF(NOTRAILERS);
  77 #endif
  78         _PF(UP);
  79 #undef _PF
  80         if (flags)
  81                 fprintf(fp, "%x", flags);
  82         if (mdown)
  83                 fprintf(fp, ",M-DOWN");
  84         fprintf(fp, "> ");
  85 }
  86
  87 static void print_queuelen(char *name)
  88 {
  89         struct ifreq ifr;
  90         int s;
  91
  92         s = socket(AF_INET, SOCK_STREAM, 0);
  93         if (s < 0)
  94                 return;
  95
  96         memset(&ifr, 0, sizeof(ifr));
  97         strcpy(ifr.ifr_name, name);
  98         if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
  99                 perror("SIOCGIFXQLEN");
 100                 close(s);
 101                 return;
 102         }
 103         close(s);
 104
 105         if (ifr.ifr_qlen)
 106                 printf("qlen %d", ifr.ifr_qlen);
 107 }
 108
 109 static int print_linkinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 110 {
 111         FILE *fp = (FILE*)arg;
 112         struct ifinfomsg *ifi = NLMSG_DATA(n);
 113         struct rtattr * tb[IFLA_MAX+1];
 114         int len = n->nlmsg_len;
 115         unsigned m_flag = 0;
 116
 117         if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
 118                 return 0;
 119
 120         len -= NLMSG_LENGTH(sizeof(*ifi));
 121         if (len < 0)
 122                 return -1;
 123
 124         if (filter.ifindex && ifi->ifi_index != filter.ifindex)
 125                 return 0;
 126         if (filter.up && !(ifi->ifi_flags&IFF_UP))
 127                 return 0;
 128
 129         memset(tb, 0, sizeof(tb));
 130         parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
 131         if (tb[IFLA_IFNAME] == NULL) {
 132                 error_msg("nil ifname");
 133                 return -1;
 134         }
 135         if (filter.label &&
 136             (!filter.family || filter.family == AF_PACKET) &&
 137             fnmatch(filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0))
 138                 return 0;
 139
 140         if (n->nlmsg_type == RTM_DELLINK)
 141                 fprintf(fp, "Deleted ");
 142
 143         fprintf(fp, "%d: %s", ifi->ifi_index,
 144                 tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>");
 145
 146         if (tb[IFLA_LINK]) {
 147                 SPRINT_BUF(b1);
 148                 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
 149                 if (iflink == 0)
 150                         fprintf(fp, "@NONE: ");
 151                 else {
 152                         fprintf(fp, "@%s: ", ll_idx_n2a(iflink, b1));
 153                         m_flag = ll_index_to_flags(iflink);
 154                         m_flag = !(m_flag & IFF_UP);
 155                 }
 156         } else {
 157                 fprintf(fp, ": ");
 158         }
 159         print_link_flags(fp, ifi->ifi_flags, m_flag);
 160
 161         if (tb[IFLA_MTU])
 162                 fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
 163         if (tb[IFLA_QDISC])
 164                 fprintf(fp, "qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
 165 #ifdef IFLA_MASTER
 166         if (tb[IFLA_MASTER]) {
 167                 SPRINT_BUF(b1);
 168                 fprintf(fp, "master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
 169         }
 170 #endif
 171         if (filter.showqueue)
 172                 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
 173
 174         if (!filter.family || filter.family == AF_PACKET) {
 175                 SPRINT_BUF(b1);
 176                 fprintf(fp, "%s", _SL_);
 177                 fprintf(fp, "    link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
 178
 179                 if (tb[IFLA_ADDRESS]) {
 180                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
 181                                                       RTA_PAYLOAD(tb[IFLA_ADDRESS]),
 182                                                       ifi->ifi_type,
 183                                                       b1, sizeof(b1)));
 184                 }
 185                 if (tb[IFLA_BROADCAST]) {
 186                         if (ifi->ifi_flags&IFF_POINTOPOINT)
 187                                 fprintf(fp, " peer ");
 188                         else
 189                                 fprintf(fp, " brd ");
 190                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
 191                                                       RTA_PAYLOAD(tb[IFLA_BROADCAST]),
 192                                                       ifi->ifi_type,
 193                                                       b1, sizeof(b1)));
 194                 }
 195         }
 196         fprintf(fp, "\n");
 197         fflush(fp);
 198         return 0;
 199 }
 200
 201 static int print_addrinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 202 {
 203         FILE *fp = (FILE*)arg;
 204         struct ifaddrmsg *ifa = NLMSG_DATA(n);
 205         int len = n->nlmsg_len;
 206         struct rtattr * rta_tb[IFA_MAX+1];
 207         char abuf[256];
 208         SPRINT_BUF(b1);
 209
 210         if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
 211                 return 0;
 212         len -= NLMSG_LENGTH(sizeof(*ifa));
 213         if (len < 0) {
 214                 error_msg("wrong nlmsg len %d", len);
 215                 return -1;
 216         }
 217
 218         memset(rta_tb, 0, sizeof(rta_tb));
 219         parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
 220
 221         if (!rta_tb[IFA_LOCAL])
 222                 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
 223         if (!rta_tb[IFA_ADDRESS])
 224                 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
 225
 226         if (filter.ifindex && filter.ifindex != ifa->ifa_index)
 227                 return 0;
 228         if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 229                 return 0;
 230         if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 231                 return 0;
 232         if (filter.label) {
 233                 const char *label;
 234                 if (rta_tb[IFA_LABEL])
 235                         label = RTA_DATA(rta_tb[IFA_LABEL]);
 236                 else
 237                         label = ll_idx_n2a(ifa->ifa_index, b1);
 238                 if (fnmatch(filter.label, label, 0) != 0)
 239                         return 0;
 240         }
 241         if (filter.pfx.family) {
 242                 if (rta_tb[IFA_LOCAL]) {
 243                         inet_prefix dst;
 244                         memset(&dst, 0, sizeof(dst));
 245                         dst.family = ifa->ifa_family;
 246                         memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
 247                         if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 248                                 return 0;
 249                 }
 250         }
 251
 252         if (n->nlmsg_type == RTM_DELADDR)
 253                 fprintf(fp, "Deleted ");
 254
 255         if (filter.oneline)
 256                 fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
 257         if (ifa->ifa_family == AF_INET)
 258                 fprintf(fp, "    inet ");
 259         else if (ifa->ifa_family == AF_INET6)
 260                 fprintf(fp, "    inet6 ");
 261         else
 262                 fprintf(fp, "    family %d ", ifa->ifa_family);
 263
 264         if (rta_tb[IFA_LOCAL]) {
 265                 fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
 266                                               RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 267                                               RTA_DATA(rta_tb[IFA_LOCAL]),
 268                                               abuf, sizeof(abuf)));
 269
 270                 if (rta_tb[IFA_ADDRESS] == NULL ||
 271                     memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
 272                         fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 273                 } else {
 274                         fprintf(fp, " peer %s/%d ",
 275                                 rt_addr_n2a(ifa->ifa_family,
 276                                             RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 277                                             RTA_DATA(rta_tb[IFA_ADDRESS]),
 278                                             abuf, sizeof(abuf)),
 279                                 ifa->ifa_prefixlen);
 280                 }
 281         }
 282
 283         if (rta_tb[IFA_BROADCAST]) {
 284                 fprintf(fp, "brd %s ",
 285                         rt_addr_n2a(ifa->ifa_family,
 286                                     RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 287                                     RTA_DATA(rta_tb[IFA_BROADCAST]),
 288                                     abuf, sizeof(abuf)));
 289         }
 290         if (rta_tb[IFA_ANYCAST]) {
 291                 fprintf(fp, "any %s ",
 292                         rt_addr_n2a(ifa->ifa_family,
 293                                     RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 294                                     RTA_DATA(rta_tb[IFA_ANYCAST]),
 295                                     abuf, sizeof(abuf)));
 296         }
 297         fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
 298         if (ifa->ifa_flags&IFA_F_SECONDARY) {
 299                 ifa->ifa_flags &= ~IFA_F_SECONDARY;
 300                 fprintf(fp, "secondary ");
 301         }
 302         if (ifa->ifa_flags&IFA_F_TENTATIVE) {
 303                 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
 304                 fprintf(fp, "tentative ");
 305         }
 306         if (ifa->ifa_flags&IFA_F_DEPRECATED) {
 307                 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
 308                 fprintf(fp, "deprecated ");
 309         }
 310         if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
 311                 fprintf(fp, "dynamic ");
 312         } else
 313                 ifa->ifa_flags &= ~IFA_F_PERMANENT;
 314         if (ifa->ifa_flags)
 315                 fprintf(fp, "flags %02x ", ifa->ifa_flags);
 316         if (rta_tb[IFA_LABEL])
 317                 fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
 318         if (rta_tb[IFA_CACHEINFO]) {
 319                 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
 320                 char buf[128];
 321                 fprintf(fp, "%s", _SL_);
 322                 if (ci->ifa_valid == 0xFFFFFFFFU)
 323                         sprintf(buf, "valid_lft forever");
 324                 else
 325                         sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
 326                 if (ci->ifa_prefered == 0xFFFFFFFFU)
 327                         sprintf(buf+strlen(buf), " preferred_lft forever");
 328                 else
 329                         sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
 330                 fprintf(fp, "       %s", buf);
 331         }
 332         fprintf(fp, "\n");
 333         fflush(fp);
 334         return 0;
 335 }
 336
 337
 338 struct nlmsg_list
 339 {
 340         struct nlmsg_list *next;
 341         struct nlmsghdr   h;
 342 };
 343
 344 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
 345 {
 346         for ( ;ainfo ;  ainfo = ainfo->next) {
 347                 struct nlmsghdr *n = &ainfo->h;
 348                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 349
 350                 if (n->nlmsg_type != RTM_NEWADDR)
 351                         continue;
 352
 353                 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
 354                         return -1;
 355
 356                 if (ifa->ifa_index != ifindex ||
 357                     (filter.family && filter.family != ifa->ifa_family))
 358                         continue;
 359
 360                 print_addrinfo(NULL, n, fp);
 361         }
 362         return 0;
 363 }
 364
 365
 366 static int store_nlmsg(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 367 {
 368         struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
 369         struct nlmsg_list *h;
 370         struct nlmsg_list **lp;
 371
 372         h = malloc(n->nlmsg_len+sizeof(void*));
 373         if (h == NULL)
 374                 return -1;
 375
 376         memcpy(&h->h, n, n->nlmsg_len);
 377         h->next = NULL;
 378
 379         for (lp = linfo; *lp; lp = &(*lp)->next) /* NOTHING */;
 380         *lp = h;
 381
 382         ll_remember_index(who, n, NULL);
 383         return 0;
 384 }
 385
 386 static void ipaddr_reset_filter(int _oneline)
 387 {
 388         memset(&filter, 0, sizeof(filter));
 389         filter.oneline = _oneline;
 390 }
 391
 392 extern int ipaddr_list(int argc, char **argv)
 393 {
 394         const char *option[] = { "to", "scope", "up", "label", "dev", 0 };
 395         struct nlmsg_list *linfo = NULL;
 396         struct nlmsg_list *ainfo = NULL;
 397         struct nlmsg_list *l;
 398         struct rtnl_handle rth;
 399         char *filter_dev = NULL;
 400         int no_link = 0;
 401
 402         ipaddr_reset_filter(oneline);
 403         filter.showqueue = 1;
 404
 405         if (filter.family == AF_UNSPEC)
 406                 filter.family = preferred_family;
 407
 408         while (argc > 0) {
 409                 const unsigned short option_num = compare_string_array(option, *argv);
 410                 switch (option_num) {
 411                         case 0: /* to */
 412                                 NEXT_ARG();
 413                                 get_prefix(&filter.pfx, *argv, filter.family);
 414                                 if (filter.family == AF_UNSPEC) {
 415                                         filter.family = filter.pfx.family;
 416                                 }
 417                                 break;
 418                         case 1: /* scope */
 419                         {
 420                                 int scope = 0;
 421                                 NEXT_ARG();
 422                                 filter.scopemask = -1;
 423                                 if (rtnl_rtscope_a2n(&scope, *argv)) {
 424                                         if (strcmp(*argv, "all") != 0) {
 425                                                 invarg("invalid \"scope\"\n", *argv);
 426                                         }
 427                                         scope = RT_SCOPE_NOWHERE;
 428                                         filter.scopemask = 0;
 429                                 }
 430                                 filter.scope = scope;
 431                                 break;
 432                         }
 433                         case 2: /* up */
 434                                 filter.up = 1;
 435                                 break;
 436                         case 3: /* label */
 437                                 NEXT_ARG();
 438                                 filter.label = *argv;
 439                                 break;
 440                         case 4: /* dev */
 441                                 NEXT_ARG();
 442                         default:
 443                                 if (filter_dev) {
 444                                         duparg2("dev", *argv);
 445                                 }
 446                                 filter_dev = *argv;
 447                 }
 448                 argv++;
 449                 argc--;
 450         }
 451
 452         if (rtnl_open(&rth, 0) < 0)
 453                 exit(1);
 454
 455         if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
 456                 perror_msg_and_die("Cannot send dump request");
 457         }
 458
 459         if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
 460                 error_msg_and_die("Dump terminated");
 461         }
 462
 463         if (filter_dev) {
 464                 filter.ifindex = ll_name_to_index(filter_dev);
 465                 if (filter.ifindex <= 0) {
 466                         error_msg("Device \"%s\" does not exist.", filter_dev);
 467                         return -1;
 468                 }
 469         }
 470
 471         if (filter.family != AF_PACKET) {
 472                 if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 473                         perror_msg_and_die("Cannot send dump request");
 474                 }
 475
 476                 if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
 477                         error_msg_and_die("Dump terminated");
 478                 }
 479         }
 480
 481
 482         if (filter.family && filter.family != AF_PACKET) {
 483                 struct nlmsg_list **lp;
 484                 lp=&linfo;
 485
 486                 if (filter.oneline)
 487                         no_link = 1;
 488
 489                 while ((l=*lp)!=NULL) {
 490                         int ok = 0;
 491                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 492                         struct nlmsg_list *a;
 493
 494                         for (a=ainfo; a; a=a->next) {
 495                                 struct nlmsghdr *n = &a->h;
 496                                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 497
 498                                 if (ifa->ifa_index != ifi->ifi_index ||
 499                                     (filter.family && filter.family != ifa->ifa_family))
 500                                         continue;
 501                                 if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 502                                         continue;
 503                                 if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 504                                         continue;
 505                                 if (filter.pfx.family || filter.label) {
 506                                         struct rtattr *tb[IFA_MAX+1];
 507                                         memset(tb, 0, sizeof(tb));
 508                                         parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
 509                                         if (!tb[IFA_LOCAL])
 510                                                 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 511
 512                                         if (filter.pfx.family && tb[IFA_LOCAL]) {
 513                                                 inet_prefix dst;
 514                                                 memset(&dst, 0, sizeof(dst));
 515                                                 dst.family = ifa->ifa_family;
 516                                                 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
 517                                                 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 518                                                         continue;
 519                                         }
 520                                         if (filter.label) {
 521                                                 SPRINT_BUF(b1);
 522                                                 const char *label;
 523                                                 if (tb[IFA_LABEL])
 524                                                         label = RTA_DATA(tb[IFA_LABEL]);
 525                                                 else
 526                                                         label = ll_idx_n2a(ifa->ifa_index, b1);
 527                                                 if (fnmatch(filter.label, label, 0) != 0)
 528                                                         continue;
 529                                         }
 530                                 }
 531
 532                                 ok = 1;
 533                                 break;
 534                         }
 535                         if (!ok)
 536                                 *lp = l->next;
 537                         else
 538                                 lp = &l->next;
 539                 }
 540         }
 541
 542         for (l=linfo; l; l = l->next) {
 543                 if (no_link || print_linkinfo(NULL, &l->h, stdout) == 0) {
 544                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 545                         if (filter.family != AF_PACKET)
 546                                 print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
 547                 }
 548                 fflush(stdout);
 549         }
 550
 551         exit(0);
 552 }
 553
 554 static int default_scope(inet_prefix *lcl)
 555 {
 556         if (lcl->family == AF_INET) {
 557                 if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
 558                         return RT_SCOPE_HOST;
 559         }
 560         return 0;
 561 }
 562
 563 static int ipaddr_modify(int cmd, int argc, char **argv)
 564 {
 565         const char *option[] = { "peer", "remote", "broadcast", "brd",
 566                 "anycast", "scope", "dev", "label", "local", 0 };
 567         struct rtnl_handle rth;
 568         struct {
 569                 struct nlmsghdr         n;
 570                 struct ifaddrmsg        ifa;
 571                 char                    buf[256];
 572         } req;
 573         char  *d = NULL;
 574         char  *l = NULL;
 575         inet_prefix lcl;
 576         inet_prefix peer;
 577         int local_len = 0;
 578         int peer_len = 0;
 579         int brd_len = 0;
 580         int any_len = 0;
 581         int scoped = 0;
 582
 583         memset(&req, 0, sizeof(req));
 584
 585         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
 586         req.n.nlmsg_flags = NLM_F_REQUEST;
 587         req.n.nlmsg_type = cmd;
 588         req.ifa.ifa_family = preferred_family;
 589
 590         while (argc > 0) {
 591                 const unsigned short option_num = compare_string_array(option, *argv);
 592                 switch (option_num) {
 593                         case 0: /* peer */
 594                         case 1: /* remote */
 595                                 NEXT_ARG();
 596
 597                                 if (peer_len) {
 598                                         duparg("peer", *argv);
 599                                 }
 600                                 get_prefix(&peer, *argv, req.ifa.ifa_family);
 601                                 peer_len = peer.bytelen;
 602                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 603                                         req.ifa.ifa_family = peer.family;
 604                                 }
 605                                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
 606                                 req.ifa.ifa_prefixlen = peer.bitlen;
 607                                 break;
 608                         case 2: /* broadcast */
 609                         case 3: /* brd */
 610                         {
 611                                 inet_prefix addr;
 612                                 NEXT_ARG();
 613                                 if (brd_len) {
 614                                         duparg("broadcast", *argv);
 615                                 }
 616                                 if (strcmp(*argv, "+") == 0) {
 617                                         brd_len = -1;
 618                                 }
 619                                 else if (strcmp(*argv, "-") == 0) {
 620                                         brd_len = -2;
 621                                 } else {
 622                                         get_addr(&addr, *argv, req.ifa.ifa_family);
 623                                         if (req.ifa.ifa_family == AF_UNSPEC)
 624                                                 req.ifa.ifa_family = addr.family;
 625                                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
 626                                         brd_len = addr.bytelen;
 627                                 }
 628                                 break;
 629                         }
 630                         case 4: /* anycast */
 631                         {
 632                                 inet_prefix addr;
 633                                 NEXT_ARG();
 634                                 if (any_len) {
 635                                         duparg("anycast", *argv);
 636                                 }
 637                                 get_addr(&addr, *argv, req.ifa.ifa_family);
 638                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 639                                         req.ifa.ifa_family = addr.family;
 640                                 }
 641                                 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
 642                                 any_len = addr.bytelen;
 643                                 break;
 644                         }
 645                         case 5: /* scope */
 646                         {
 647                                 int scope = 0;
 648                                 NEXT_ARG();
 649                                 if (rtnl_rtscope_a2n(&scope, *argv)) {
 650                                         invarg(*argv, "invalid scope value.");
 651                                 }
 652                                 req.ifa.ifa_scope = scope;
 653                                 scoped = 1;
 654                                 break;
 655                         }
 656                         case 6: /* dev */
 657                                 NEXT_ARG();
 658                                 d = *argv;
 659                                 break;
 660                         case 7: /* label */
 661                                 NEXT_ARG();
 662                                 l = *argv;
 663                                 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
 664                                 break;
 665                         case 8: /* local */
 666                                 NEXT_ARG();
 667                         default:
 668                                 if (local_len) {
 669                                         duparg2("local", *argv);
 670                                 }
 671                                 get_prefix(&lcl, *argv, req.ifa.ifa_family);
 672                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 673                                         req.ifa.ifa_family = lcl.family;
 674                                 }
 675                                 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
 676                                 local_len = lcl.bytelen;
 677                 }
 678                 argc--;
 679                 argv++;
 680         }
 681
 682         if (d == NULL) {
 683                 error_msg("Not enough information: \"dev\" argument is required.");
 684                 return -1;
 685         }
 686         if (l && matches(d, l) != 0) {
 687                 error_msg_and_die("\"dev\" (%s) must match \"label\" (%s).", d, l);
 688         }
 689
 690         if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
 691                 peer = lcl;
 692                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
 693         }
 694         if (req.ifa.ifa_prefixlen == 0)
 695                 req.ifa.ifa_prefixlen = lcl.bitlen;
 696
 697         if (brd_len < 0 && cmd != RTM_DELADDR) {
 698                 inet_prefix brd;
 699                 int i;
 700                 if (req.ifa.ifa_family != AF_INET) {
 701                         error_msg("Broadcast can be set only for IPv4 addresses");
 702                         return -1;
 703                 }
 704                 brd = peer;
 705                 if (brd.bitlen <= 30) {
 706                         for (i=31; i>=brd.bitlen; i--) {
 707                                 if (brd_len == -1)
 708                                         brd.data[0] |= htonl(1<<(31-i));
 709                                 else
 710                                         brd.data[0] &= ~htonl(1<<(31-i));
 711                         }
 712                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
 713                         brd_len = brd.bytelen;
 714                 }
 715         }
 716         if (!scoped && cmd != RTM_DELADDR)
 717                 req.ifa.ifa_scope = default_scope(&lcl);
 718
 719         if (rtnl_open(&rth, 0) < 0)
 720                 exit(1);
 721
 722         ll_init_map(&rth);
 723
 724         if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
 725                 error_msg("Cannot find device \"%s\"", d);
 726                 return -1;
 727         }
 728
 729         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 730                 exit(2);
 731
 732         exit(0);
 733 }
 734
 735 extern int do_ipaddr(int argc, char **argv)
 736 {
 737         const char *commands[] = { "add", "delete", "list", "show", "lst", 0 };
 738         unsigned short command_num = 2;
 739
 740         if (*argv) {
 741                 command_num = compare_string_array(commands, *argv);
 742         }
 743         switch (command_num) {
 744                 case 0: /* add */
 745                         return ipaddr_modify(RTM_NEWADDR, argc-1, argv+1);
 746                 case 1: /* delete */
 747                         return ipaddr_modify(RTM_DELADDR, argc-1, argv+1);
 748                 case 2: /* list */
 749                 case 3: /* show */
 750                 case 4: /* lst */
 751                         return ipaddr_list(argc-1, argv+1);
 752         }
 753         error_msg_and_die("Unknown command %s", *argv);
 754 }