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 static int do_link;
  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 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 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 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                 SPRINT_BUF(b1);
 234                 const char *label;
 235                 if (rta_tb[IFA_LABEL])
 236                         label = RTA_DATA(rta_tb[IFA_LABEL]);
 237                 else
 238                         label = ll_idx_n2a(ifa->ifa_index, b1);
 239                 if (fnmatch(filter.label, label, 0) != 0)
 240                         return 0;
 241         }
 242         if (filter.pfx.family) {
 243                 if (rta_tb[IFA_LOCAL]) {
 244                         inet_prefix dst;
 245                         memset(&dst, 0, sizeof(dst));
 246                         dst.family = ifa->ifa_family;
 247                         memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
 248                         if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 249                                 return 0;
 250                 }
 251         }
 252
 253         if (n->nlmsg_type == RTM_DELADDR)
 254                 fprintf(fp, "Deleted ");
 255
 256         if (filter.oneline)
 257                 fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
 258         if (ifa->ifa_family == AF_INET)
 259                 fprintf(fp, "    inet ");
 260         else if (ifa->ifa_family == AF_INET6)
 261                 fprintf(fp, "    inet6 ");
 262         else
 263                 fprintf(fp, "    family %d ", ifa->ifa_family);
 264
 265         if (rta_tb[IFA_LOCAL]) {
 266                 fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
 267                                               RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 268                                               RTA_DATA(rta_tb[IFA_LOCAL]),
 269                                               abuf, sizeof(abuf)));
 270
 271                 if (rta_tb[IFA_ADDRESS] == NULL ||
 272                     memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
 273                         fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 274                 } else {
 275                         fprintf(fp, " peer %s/%d ",
 276                                 rt_addr_n2a(ifa->ifa_family,
 277                                             RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 278                                             RTA_DATA(rta_tb[IFA_ADDRESS]),
 279                                             abuf, sizeof(abuf)),
 280                                 ifa->ifa_prefixlen);
 281                 }
 282         }
 283
 284         if (rta_tb[IFA_BROADCAST]) {
 285                 fprintf(fp, "brd %s ",
 286                         rt_addr_n2a(ifa->ifa_family,
 287                                     RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 288                                     RTA_DATA(rta_tb[IFA_BROADCAST]),
 289                                     abuf, sizeof(abuf)));
 290         }
 291         if (rta_tb[IFA_ANYCAST]) {
 292                 fprintf(fp, "any %s ",
 293                         rt_addr_n2a(ifa->ifa_family,
 294                                     RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 295                                     RTA_DATA(rta_tb[IFA_ANYCAST]),
 296                                     abuf, sizeof(abuf)));
 297         }
 298         fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
 299         if (ifa->ifa_flags&IFA_F_SECONDARY) {
 300                 ifa->ifa_flags &= ~IFA_F_SECONDARY;
 301                 fprintf(fp, "secondary ");
 302         }
 303         if (ifa->ifa_flags&IFA_F_TENTATIVE) {
 304                 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
 305                 fprintf(fp, "tentative ");
 306         }
 307         if (ifa->ifa_flags&IFA_F_DEPRECATED) {
 308                 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
 309                 fprintf(fp, "deprecated ");
 310         }
 311         if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
 312                 fprintf(fp, "dynamic ");
 313         } else
 314                 ifa->ifa_flags &= ~IFA_F_PERMANENT;
 315         if (ifa->ifa_flags)
 316                 fprintf(fp, "flags %02x ", ifa->ifa_flags);
 317         if (rta_tb[IFA_LABEL])
 318                 fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
 319         if (rta_tb[IFA_CACHEINFO]) {
 320                 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
 321                 char buf[128];
 322                 fprintf(fp, "%s", _SL_);
 323                 if (ci->ifa_valid == 0xFFFFFFFFU)
 324                         sprintf(buf, "valid_lft forever");
 325                 else
 326                         sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
 327                 if (ci->ifa_prefered == 0xFFFFFFFFU)
 328                         sprintf(buf+strlen(buf), " preferred_lft forever");
 329                 else
 330                         sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
 331                 fprintf(fp, "       %s", buf);
 332         }
 333         fprintf(fp, "\n");
 334         fflush(fp);
 335         return 0;
 336 }
 337
 338
 339 struct nlmsg_list
 340 {
 341         struct nlmsg_list *next;
 342         struct nlmsghdr   h;
 343 };
 344
 345 int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
 346 {
 347         for ( ;ainfo ;  ainfo = ainfo->next) {
 348                 struct nlmsghdr *n = &ainfo->h;
 349                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 350
 351                 if (n->nlmsg_type != RTM_NEWADDR)
 352                         continue;
 353
 354                 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
 355                         return -1;
 356
 357                 if (ifa->ifa_index != ifindex ||
 358                     (filter.family && filter.family != ifa->ifa_family))
 359                         continue;
 360
 361                 print_addrinfo(NULL, n, fp);
 362         }
 363         return 0;
 364 }
 365
 366
 367 int store_nlmsg(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 368 {
 369         struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
 370         struct nlmsg_list *h;
 371         struct nlmsg_list **lp;
 372
 373         h = malloc(n->nlmsg_len+sizeof(void*));
 374         if (h == NULL)
 375                 return -1;
 376
 377         memcpy(&h->h, n, n->nlmsg_len);
 378         h->next = NULL;
 379
 380         for (lp = linfo; *lp; lp = &(*lp)->next) /* NOTHING */;
 381         *lp = h;
 382
 383         ll_remember_index(who, n, NULL);
 384         return 0;
 385 }
 386
 387 int ipaddr_list(int argc, char **argv)
 388 {
 389         struct nlmsg_list *linfo = NULL;
 390         struct nlmsg_list *ainfo = NULL;
 391         struct nlmsg_list *l;
 392         struct rtnl_handle rth;
 393         char *filter_dev = NULL;
 394         int no_link = 0;
 395
 396         ipaddr_reset_filter(oneline);
 397         filter.showqueue = 1;
 398
 399         if (filter.family == AF_UNSPEC)
 400                 filter.family = preferred_family;
 401
 402         while (argc > 0) {
 403                 if (strcmp(*argv, "to") == 0) {
 404                         NEXT_ARG();
 405                         get_prefix(&filter.pfx, *argv, filter.family);
 406                         if (filter.family == AF_UNSPEC)
 407                                 filter.family = filter.pfx.family;
 408                 } else if (strcmp(*argv, "scope") == 0) {
 409                         int scope = 0;
 410                         NEXT_ARG();
 411                         filter.scopemask = -1;
 412                         if (rtnl_rtscope_a2n(&scope, *argv)) {
 413                                 if (strcmp(*argv, "all") != 0)
 414                                         invarg("invalid \"scope\"\n", *argv);
 415                                 scope = RT_SCOPE_NOWHERE;
 416                                 filter.scopemask = 0;
 417                         }
 418                         filter.scope = scope;
 419                 } else if (strcmp(*argv, "up") == 0) {
 420                         filter.up = 1;
 421                 } else if (strcmp(*argv, "label") == 0) {
 422                         NEXT_ARG();
 423                         filter.label = *argv;
 424                 } else {
 425                         if (strcmp(*argv, "dev") == 0) {
 426                                 NEXT_ARG();
 427                         }
 428                         if (filter_dev)
 429                                 duparg2("dev", *argv);
 430                         filter_dev = *argv;
 431                 }
 432                 argv++; argc--;
 433         }
 434
 435         if (rtnl_open(&rth, 0) < 0)
 436                 exit(1);
 437
 438         if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
 439                 perror_msg_and_die("Cannot send dump request");
 440         }
 441
 442         if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
 443                 error_msg_and_die("Dump terminated");
 444         }
 445
 446         if (filter_dev) {
 447                 filter.ifindex = ll_name_to_index(filter_dev);
 448                 if (filter.ifindex <= 0) {
 449                         error_msg("Device \"%s\" does not exist.", filter_dev);
 450                         return -1;
 451                 }
 452         }
 453
 454         if (filter.family != AF_PACKET) {
 455                 if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 456                         perror_msg_and_die("Cannot send dump request");
 457                 }
 458
 459                 if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
 460                         error_msg_and_die("Dump terminated");
 461                 }
 462         }
 463
 464
 465         if (filter.family && filter.family != AF_PACKET) {
 466                 struct nlmsg_list **lp;
 467                 lp=&linfo;
 468
 469                 if (filter.oneline)
 470                         no_link = 1;
 471
 472                 while ((l=*lp)!=NULL) {
 473                         int ok = 0;
 474                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 475                         struct nlmsg_list *a;
 476
 477                         for (a=ainfo; a; a=a->next) {
 478                                 struct nlmsghdr *n = &a->h;
 479                                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 480
 481                                 if (ifa->ifa_index != ifi->ifi_index ||
 482                                     (filter.family && filter.family != ifa->ifa_family))
 483                                         continue;
 484                                 if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 485                                         continue;
 486                                 if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 487                                         continue;
 488                                 if (filter.pfx.family || filter.label) {
 489                                         struct rtattr *tb[IFA_MAX+1];
 490                                         memset(tb, 0, sizeof(tb));
 491                                         parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
 492                                         if (!tb[IFA_LOCAL])
 493                                                 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 494
 495                                         if (filter.pfx.family && tb[IFA_LOCAL]) {
 496                                                 inet_prefix dst;
 497                                                 memset(&dst, 0, sizeof(dst));
 498                                                 dst.family = ifa->ifa_family;
 499                                                 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
 500                                                 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 501                                                         continue;
 502                                         }
 503                                         if (filter.label) {
 504                                                 SPRINT_BUF(b1);
 505                                                 const char *label;
 506                                                 if (tb[IFA_LABEL])
 507                                                         label = RTA_DATA(tb[IFA_LABEL]);
 508                                                 else
 509                                                         label = ll_idx_n2a(ifa->ifa_index, b1);
 510                                                 if (fnmatch(filter.label, label, 0) != 0)
 511                                                         continue;
 512                                         }
 513                                 }
 514
 515                                 ok = 1;
 516                                 break;
 517                         }
 518                         if (!ok)
 519                                 *lp = l->next;
 520                         else
 521                                 lp = &l->next;
 522                 }
 523         }
 524
 525         for (l=linfo; l; l = l->next) {
 526                 if (no_link || print_linkinfo(NULL, &l->h, stdout) == 0) {
 527                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 528                         if (filter.family != AF_PACKET)
 529                                 print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
 530                 }
 531                 fflush(stdout);
 532         }
 533
 534         exit(0);
 535 }
 536
 537 int ipaddr_list_link(int argc, char **argv)
 538 {
 539         preferred_family = AF_PACKET;
 540         do_link = 1;
 541         return ipaddr_list(argc, argv);
 542 }
 543
 544 void ipaddr_reset_filter(int oneline)
 545 {
 546         memset(&filter, 0, sizeof(filter));
 547         filter.oneline = oneline;
 548 }
 549
 550 int default_scope(inet_prefix *lcl)
 551 {
 552         if (lcl->family == AF_INET) {
 553                 if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
 554                         return RT_SCOPE_HOST;
 555         }
 556         return 0;
 557 }
 558
 559 int ipaddr_modify(int cmd, int argc, char **argv)
 560 {
 561         struct rtnl_handle rth;
 562         struct {
 563                 struct nlmsghdr         n;
 564                 struct ifaddrmsg        ifa;
 565                 char                    buf[256];
 566         } req;
 567         char  *d = NULL;
 568         char  *l = NULL;
 569         inet_prefix lcl;
 570         inet_prefix peer;
 571         int local_len = 0;
 572         int peer_len = 0;
 573         int brd_len = 0;
 574         int any_len = 0;
 575         int scoped = 0;
 576
 577         memset(&req, 0, sizeof(req));
 578
 579         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
 580         req.n.nlmsg_flags = NLM_F_REQUEST;
 581         req.n.nlmsg_type = cmd;
 582         req.ifa.ifa_family = preferred_family;
 583
 584         while (argc > 0) {
 585                 if (strcmp(*argv, "peer") == 0 ||
 586                     strcmp(*argv, "remote") == 0) {
 587                         NEXT_ARG();
 588
 589                         if (peer_len)
 590                                 duparg("peer", *argv);
 591                         get_prefix(&peer, *argv, req.ifa.ifa_family);
 592                         peer_len = peer.bytelen;
 593                         if (req.ifa.ifa_family == AF_UNSPEC)
 594                                 req.ifa.ifa_family = peer.family;
 595                         addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
 596                         req.ifa.ifa_prefixlen = peer.bitlen;
 597                 } else if (matches(*argv, "broadcast") == 0 ||
 598                            strcmp(*argv, "brd") == 0) {
 599                         inet_prefix addr;
 600                         NEXT_ARG();
 601                         if (brd_len)
 602                                 duparg("broadcast", *argv);
 603                         if (strcmp(*argv, "+") == 0)
 604                                 brd_len = -1;
 605                         else if (strcmp(*argv, "-") == 0)
 606                                 brd_len = -2;
 607                         else {
 608                                 get_addr(&addr, *argv, req.ifa.ifa_family);
 609                                 if (req.ifa.ifa_family == AF_UNSPEC)
 610                                         req.ifa.ifa_family = addr.family;
 611                                 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
 612                                 brd_len = addr.bytelen;
 613                         }
 614                 } else if (strcmp(*argv, "anycast") == 0) {
 615                         inet_prefix addr;
 616                         NEXT_ARG();
 617                         if (any_len)
 618                                 duparg("anycast", *argv);
 619                         get_addr(&addr, *argv, req.ifa.ifa_family);
 620                         if (req.ifa.ifa_family == AF_UNSPEC)
 621                                 req.ifa.ifa_family = addr.family;
 622                         addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
 623                         any_len = addr.bytelen;
 624                 } else if (strcmp(*argv, "scope") == 0) {
 625                         int scope = 0;
 626                         NEXT_ARG();
 627                         if (rtnl_rtscope_a2n(&scope, *argv))
 628                                 invarg(*argv, "invalid scope value.");
 629                         req.ifa.ifa_scope = scope;
 630                         scoped = 1;
 631                 } else if (strcmp(*argv, "dev") == 0) {
 632                         NEXT_ARG();
 633                         d = *argv;
 634                 } else if (strcmp(*argv, "label") == 0) {
 635                         NEXT_ARG();
 636                         l = *argv;
 637                         addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
 638                 } else {
 639                         if (strcmp(*argv, "local") == 0) {
 640                                 NEXT_ARG();
 641                         }
 642                         if (local_len)
 643                                 duparg2("local", *argv);
 644                         get_prefix(&lcl, *argv, req.ifa.ifa_family);
 645                         if (req.ifa.ifa_family == AF_UNSPEC)
 646                                 req.ifa.ifa_family = lcl.family;
 647                         addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
 648                         local_len = lcl.bytelen;
 649                 }
 650                 argc--; argv++;
 651         }
 652         if (d == NULL) {
 653                 error_msg("Not enough information: \"dev\" argument is required.");
 654                 return -1;
 655         }
 656         if (l && matches(d, l) != 0) {
 657                 error_msg_and_die("\"dev\" (%s) must match \"label\" (%s).", d, l);
 658         }
 659
 660         if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
 661                 peer = lcl;
 662                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
 663         }
 664         if (req.ifa.ifa_prefixlen == 0)
 665                 req.ifa.ifa_prefixlen = lcl.bitlen;
 666
 667         if (brd_len < 0 && cmd != RTM_DELADDR) {
 668                 inet_prefix brd;
 669                 int i;
 670                 if (req.ifa.ifa_family != AF_INET) {
 671                         error_msg("Broadcast can be set only for IPv4 addresses");
 672                         return -1;
 673                 }
 674                 brd = peer;
 675                 if (brd.bitlen <= 30) {
 676                         for (i=31; i>=brd.bitlen; i--) {
 677                                 if (brd_len == -1)
 678                                         brd.data[0] |= htonl(1<<(31-i));
 679                                 else
 680                                         brd.data[0] &= ~htonl(1<<(31-i));
 681                         }
 682                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
 683                         brd_len = brd.bytelen;
 684                 }
 685         }
 686         if (!scoped && cmd != RTM_DELADDR)
 687                 req.ifa.ifa_scope = default_scope(&lcl);
 688
 689         if (rtnl_open(&rth, 0) < 0)
 690                 exit(1);
 691
 692         ll_init_map(&rth);
 693
 694         if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
 695                 error_msg("Cannot find device \"%s\"", d);
 696                 return -1;
 697         }
 698
 699         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 700                 exit(2);
 701
 702         exit(0);
 703 }
 704
 705 int do_ipaddr(int argc, char **argv)
 706 {
 707         if (argc < 1)
 708                 return ipaddr_list(0, NULL);
 709         if (matches(*argv, "add") == 0)
 710                 return ipaddr_modify(RTM_NEWADDR, argc-1, argv+1);
 711         if (matches(*argv, "delete") == 0)
 712                 return ipaddr_modify(RTM_DELADDR, argc-1, argv+1);
 713         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
 714             || matches(*argv, "lst") == 0)
 715                 return ipaddr_list(argc-1, argv+1);
 716         error_msg("Command \"%s\" is unknown, try \"ip address help\".", *argv);
 717         exit(-1);
 718 }