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