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 #include <net/if.h>
  26 #include <net/if_arp.h>
  27
  28 #include "rt_names.h"
  29 #include "utils.h"
  30
  31 #include "libbb.h"
  32
  33 static struct
  34 {
  35         int ifindex;
  36         int family;
  37         int oneline;
  38         int showqueue;
  39         inet_prefix pfx;
  40         int scope, scopemask;
  41         int flags, flagmask;
  42         int up;
  43         char *label;
  44         int flushed;
  45         char *flushb;
  46         int flushp;
  47         int flushe;
  48         struct rtnl_handle *rth;
  49 } filter;
  50
  51 void print_link_flags(FILE *fp, unsigned flags, unsigned mdown)
  52 {
  53         fprintf(fp, "<");
  54         flags &= ~IFF_RUNNING;
  55 #define _PF(f) if (flags&IFF_##f) { \
  56                   flags &= ~IFF_##f ; \
  57                   fprintf(fp, #f "%s", flags ? "," : ""); }
  58         _PF(LOOPBACK);
  59         _PF(BROADCAST);
  60         _PF(POINTOPOINT);
  61         _PF(MULTICAST);
  62         _PF(NOARP);
  63 #if 0
  64         _PF(ALLMULTI);
  65         _PF(PROMISC);
  66         _PF(MASTER);
  67         _PF(SLAVE);
  68         _PF(DEBUG);
  69         _PF(DYNAMIC);
  70         _PF(AUTOMEDIA);
  71         _PF(PORTSEL);
  72         _PF(NOTRAILERS);
  73 #endif
  74         _PF(UP);
  75 #undef _PF
  76         if (flags)
  77                 fprintf(fp, "%x", flags);
  78         if (mdown)
  79                 fprintf(fp, ",M-DOWN");
  80         fprintf(fp, "> ");
  81 }
  82
  83 static void print_queuelen(char *name)
  84 {
  85         struct ifreq ifr;
  86         int s;
  87
  88         s = socket(AF_INET, SOCK_STREAM, 0);
  89         if (s < 0)
  90                 return;
  91
  92         memset(&ifr, 0, sizeof(ifr));
  93         strcpy(ifr.ifr_name, name);
  94         if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
  95                 perror("SIOCGIFXQLEN");
  96                 close(s);
  97                 return;
  98         }
  99         close(s);
 100
 101         if (ifr.ifr_qlen)
 102                 printf("qlen %d", ifr.ifr_qlen);
 103 }
 104
 105 static int print_linkinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 106 {
 107         FILE *fp = (FILE*)arg;
 108         struct ifinfomsg *ifi = NLMSG_DATA(n);
 109         struct rtattr * tb[IFLA_MAX+1];
 110         int len = n->nlmsg_len;
 111         unsigned m_flag = 0;
 112
 113         if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
 114                 return 0;
 115
 116         len -= NLMSG_LENGTH(sizeof(*ifi));
 117         if (len < 0)
 118                 return -1;
 119
 120         if (filter.ifindex && ifi->ifi_index != filter.ifindex)
 121                 return 0;
 122         if (filter.up && !(ifi->ifi_flags&IFF_UP))
 123                 return 0;
 124
 125         memset(tb, 0, sizeof(tb));
 126         parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
 127         if (tb[IFLA_IFNAME] == NULL) {
 128                 bb_error_msg("nil ifname");
 129                 return -1;
 130         }
 131         if (filter.label &&
 132             (!filter.family || filter.family == AF_PACKET) &&
 133             fnmatch(filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0))
 134                 return 0;
 135
 136         if (n->nlmsg_type == RTM_DELLINK)
 137                 fprintf(fp, "Deleted ");
 138
 139         fprintf(fp, "%d: %s", ifi->ifi_index,
 140                 tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>");
 141
 142         if (tb[IFLA_LINK]) {
 143                 SPRINT_BUF(b1);
 144                 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
 145                 if (iflink == 0)
 146                         fprintf(fp, "@NONE: ");
 147                 else {
 148                         fprintf(fp, "@%s: ", ll_idx_n2a(iflink, b1));
 149                         m_flag = ll_index_to_flags(iflink);
 150                         m_flag = !(m_flag & IFF_UP);
 151                 }
 152         } else {
 153                 fprintf(fp, ": ");
 154         }
 155         print_link_flags(fp, ifi->ifi_flags, m_flag);
 156
 157         if (tb[IFLA_MTU])
 158                 fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
 159         if (tb[IFLA_QDISC])
 160                 fprintf(fp, "qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
 161 #ifdef IFLA_MASTER
 162         if (tb[IFLA_MASTER]) {
 163                 SPRINT_BUF(b1);
 164                 fprintf(fp, "master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
 165         }
 166 #endif
 167         if (filter.showqueue)
 168                 print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
 169
 170         if (!filter.family || filter.family == AF_PACKET) {
 171                 SPRINT_BUF(b1);
 172                 fprintf(fp, "%s", _SL_);
 173                 fprintf(fp, "    link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
 174
 175                 if (tb[IFLA_ADDRESS]) {
 176                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
 177                                                       RTA_PAYLOAD(tb[IFLA_ADDRESS]),
 178                                                       ifi->ifi_type,
 179                                                       b1, sizeof(b1)));
 180                 }
 181                 if (tb[IFLA_BROADCAST]) {
 182                         if (ifi->ifi_flags&IFF_POINTOPOINT)
 183                                 fprintf(fp, " peer ");
 184                         else
 185                                 fprintf(fp, " brd ");
 186                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
 187                                                       RTA_PAYLOAD(tb[IFLA_BROADCAST]),
 188                                                       ifi->ifi_type,
 189                                                       b1, sizeof(b1)));
 190                 }
 191         }
 192         fprintf(fp, "\n");
 193         fflush(fp);
 194         return 0;
 195 }
 196
 197 static int flush_update(void)
 198 {
 199         if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
 200                 perror("Failed to send flush request\n");
 201                 return -1;
 202         }
 203         filter.flushp = 0;
 204         return 0;
 205 }
 206
 207 static int print_addrinfo(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 208 {
 209         FILE *fp = (FILE*)arg;
 210         struct ifaddrmsg *ifa = NLMSG_DATA(n);
 211         int len = n->nlmsg_len;
 212         struct rtattr * rta_tb[IFA_MAX+1];
 213         char abuf[256];
 214         SPRINT_BUF(b1);
 215
 216         if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
 217                 return 0;
 218         len -= NLMSG_LENGTH(sizeof(*ifa));
 219         if (len < 0) {
 220                 bb_error_msg("wrong nlmsg len %d", len);
 221                 return -1;
 222         }
 223
 224         if (filter.flushb && n->nlmsg_type != RTM_NEWADDR)
 225                 return 0;
 226
 227         memset(rta_tb, 0, sizeof(rta_tb));
 228         parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
 229
 230         if (!rta_tb[IFA_LOCAL])
 231                 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
 232         if (!rta_tb[IFA_ADDRESS])
 233                 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
 234
 235         if (filter.ifindex && filter.ifindex != ifa->ifa_index)
 236                 return 0;
 237         if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 238                 return 0;
 239         if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 240                 return 0;
 241         if (filter.label) {
 242                 const char *label;
 243                 if (rta_tb[IFA_LABEL])
 244                         label = RTA_DATA(rta_tb[IFA_LABEL]);
 245                 else
 246                         label = ll_idx_n2a(ifa->ifa_index, b1);
 247                 if (fnmatch(filter.label, label, 0) != 0)
 248                         return 0;
 249         }
 250         if (filter.pfx.family) {
 251                 if (rta_tb[IFA_LOCAL]) {
 252                         inet_prefix dst;
 253                         memset(&dst, 0, sizeof(dst));
 254                         dst.family = ifa->ifa_family;
 255                         memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
 256                         if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 257                                 return 0;
 258                 }
 259         }
 260
 261         if (filter.flushb) {
 262                 struct nlmsghdr *fn;
 263                 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
 264                         if (flush_update())
 265                                 return -1;
 266                 }
 267                 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
 268                 memcpy(fn, n, n->nlmsg_len);
 269                 fn->nlmsg_type = RTM_DELADDR;
 270                 fn->nlmsg_flags = NLM_F_REQUEST;
 271                 fn->nlmsg_seq = ++filter.rth->seq;
 272                 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
 273                 filter.flushed++;
 274                 return 0;
 275         }
 276
 277         if (n->nlmsg_type == RTM_DELADDR)
 278                 fprintf(fp, "Deleted ");
 279
 280         if (filter.oneline)
 281                 fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
 282         if (ifa->ifa_family == AF_INET)
 283                 fprintf(fp, "    inet ");
 284         else if (ifa->ifa_family == AF_INET6)
 285                 fprintf(fp, "    inet6 ");
 286         else
 287                 fprintf(fp, "    family %d ", ifa->ifa_family);
 288
 289         if (rta_tb[IFA_LOCAL]) {
 290                 fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
 291                                               RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 292                                               RTA_DATA(rta_tb[IFA_LOCAL]),
 293                                               abuf, sizeof(abuf)));
 294
 295                 if (rta_tb[IFA_ADDRESS] == NULL ||
 296                     memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
 297                         fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 298                 } else {
 299                         fprintf(fp, " peer %s/%d ",
 300                                 rt_addr_n2a(ifa->ifa_family,
 301                                             RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 302                                             RTA_DATA(rta_tb[IFA_ADDRESS]),
 303                                             abuf, sizeof(abuf)),
 304                                 ifa->ifa_prefixlen);
 305                 }
 306         }
 307
 308         if (rta_tb[IFA_BROADCAST]) {
 309                 fprintf(fp, "brd %s ",
 310                         rt_addr_n2a(ifa->ifa_family,
 311                                     RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 312                                     RTA_DATA(rta_tb[IFA_BROADCAST]),
 313                                     abuf, sizeof(abuf)));
 314         }
 315         if (rta_tb[IFA_ANYCAST]) {
 316                 fprintf(fp, "any %s ",
 317                         rt_addr_n2a(ifa->ifa_family,
 318                                     RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 319                                     RTA_DATA(rta_tb[IFA_ANYCAST]),
 320                                     abuf, sizeof(abuf)));
 321         }
 322         fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
 323         if (ifa->ifa_flags&IFA_F_SECONDARY) {
 324                 ifa->ifa_flags &= ~IFA_F_SECONDARY;
 325                 fprintf(fp, "secondary ");
 326         }
 327         if (ifa->ifa_flags&IFA_F_TENTATIVE) {
 328                 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
 329                 fprintf(fp, "tentative ");
 330         }
 331         if (ifa->ifa_flags&IFA_F_DEPRECATED) {
 332                 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
 333                 fprintf(fp, "deprecated ");
 334         }
 335         if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
 336                 fprintf(fp, "dynamic ");
 337         } else
 338                 ifa->ifa_flags &= ~IFA_F_PERMANENT;
 339         if (ifa->ifa_flags)
 340                 fprintf(fp, "flags %02x ", ifa->ifa_flags);
 341         if (rta_tb[IFA_LABEL])
 342                 fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
 343         if (rta_tb[IFA_CACHEINFO]) {
 344                 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
 345                 char buf[128];
 346                 fprintf(fp, "%s", _SL_);
 347                 if (ci->ifa_valid == 0xFFFFFFFFU)
 348                         sprintf(buf, "valid_lft forever");
 349                 else
 350                         sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
 351                 if (ci->ifa_prefered == 0xFFFFFFFFU)
 352                         sprintf(buf+strlen(buf), " preferred_lft forever");
 353                 else
 354                         sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
 355                 fprintf(fp, "       %s", buf);
 356         }
 357         fprintf(fp, "\n");
 358         fflush(fp);
 359         return 0;
 360 }
 361
 362
 363 struct nlmsg_list
 364 {
 365         struct nlmsg_list *next;
 366         struct nlmsghdr   h;
 367 };
 368
 369 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
 370 {
 371         for ( ;ainfo ;  ainfo = ainfo->next) {
 372                 struct nlmsghdr *n = &ainfo->h;
 373                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 374
 375                 if (n->nlmsg_type != RTM_NEWADDR)
 376                         continue;
 377
 378                 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
 379                         return -1;
 380
 381                 if (ifa->ifa_index != ifindex ||
 382                     (filter.family && filter.family != ifa->ifa_family))
 383                         continue;
 384
 385                 print_addrinfo(NULL, n, fp);
 386         }
 387         return 0;
 388 }
 389
 390
 391 static int store_nlmsg(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 392 {
 393         struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
 394         struct nlmsg_list *h;
 395         struct nlmsg_list **lp;
 396
 397         h = malloc(n->nlmsg_len+sizeof(void*));
 398         if (h == NULL)
 399                 return -1;
 400
 401         memcpy(&h->h, n, n->nlmsg_len);
 402         h->next = NULL;
 403
 404         for (lp = linfo; *lp; lp = &(*lp)->next) /* NOTHING */;
 405         *lp = h;
 406
 407         ll_remember_index(who, n, NULL);
 408         return 0;
 409 }
 410
 411 static void ipaddr_reset_filter(int _oneline)
 412 {
 413         memset(&filter, 0, sizeof(filter));
 414         filter.oneline = _oneline;
 415 }
 416
 417 extern int ipaddr_list_or_flush(int argc, char **argv, int flush)
 418 {
 419         const char *option[] = { "to", "scope", "up", "label", "dev", 0 };
 420         struct nlmsg_list *linfo = NULL;
 421         struct nlmsg_list *ainfo = NULL;
 422         struct nlmsg_list *l;
 423         struct rtnl_handle rth;
 424         char *filter_dev = NULL;
 425         int no_link = 0;
 426
 427         ipaddr_reset_filter(oneline);
 428         filter.showqueue = 1;
 429
 430         if (filter.family == AF_UNSPEC)
 431                 filter.family = preferred_family;
 432
 433         if (flush) {
 434                 if (argc <= 0) {
 435                         fprintf(stderr, "Flush requires arguments.\n");
 436                         return -1;
 437                 }
 438                 if (filter.family == AF_PACKET) {
 439                         fprintf(stderr, "Cannot flush link addresses.\n");
 440                         return -1;
 441                 }
 442         }
 443
 444         while (argc > 0) {
 445                 const unsigned short option_num = compare_string_array(option, *argv);
 446                 switch (option_num) {
 447                         case 0: /* to */
 448                                 NEXT_ARG();
 449                                 get_prefix(&filter.pfx, *argv, filter.family);
 450                                 if (filter.family == AF_UNSPEC) {
 451                                         filter.family = filter.pfx.family;
 452                                 }
 453                                 break;
 454                         case 1: /* scope */
 455                         {
 456                                 int scope = 0;
 457                                 NEXT_ARG();
 458                                 filter.scopemask = -1;
 459                                 if (rtnl_rtscope_a2n(&scope, *argv)) {
 460                                         if (strcmp(*argv, "all") != 0) {
 461                                                 invarg("invalid \"scope\"\n", *argv);
 462                                         }
 463                                         scope = RT_SCOPE_NOWHERE;
 464                                         filter.scopemask = 0;
 465                                 }
 466                                 filter.scope = scope;
 467                                 break;
 468                         }
 469                         case 2: /* up */
 470                                 filter.up = 1;
 471                                 break;
 472                         case 3: /* label */
 473                                 NEXT_ARG();
 474                                 filter.label = *argv;
 475                                 break;
 476                         case 4: /* dev */
 477                                 NEXT_ARG();
 478                         default:
 479                                 if (filter_dev) {
 480                                         duparg2("dev", *argv);
 481                                 }
 482                                 filter_dev = *argv;
 483                 }
 484                 argv++;
 485                 argc--;
 486         }
 487
 488         if (rtnl_open(&rth, 0) < 0)
 489                 exit(1);
 490
 491         if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
 492                 bb_perror_msg_and_die("Cannot send dump request");
 493         }
 494
 495         if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
 496                 bb_error_msg_and_die("Dump terminated");
 497         }
 498
 499         if (filter_dev) {
 500                 filter.ifindex = ll_name_to_index(filter_dev);
 501                 if (filter.ifindex <= 0) {
 502                         bb_error_msg("Device \"%s\" does not exist.", filter_dev);
 503                         return -1;
 504                 }
 505         }
 506
 507         if (flush) {
 508                 int round = 0;
 509                 char flushb[4096-512];
 510
 511                 filter.flushb = flushb;
 512                 filter.flushp = 0;
 513                 filter.flushe = sizeof(flushb);
 514                 filter.rth = &rth;
 515
 516                 for (;;) {
 517                         if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 518                                 perror("Cannot send dump request");
 519                                 exit(1);
 520                         }
 521                         filter.flushed = 0;
 522                         if (rtnl_dump_filter(&rth, print_addrinfo, stdout, NULL, NULL) < 0) {
 523                                 fprintf(stderr, "Flush terminated\n");
 524                                 exit(1);
 525                         }
 526                         if (filter.flushed == 0) {
 527 #if 0
 528                                 if (round == 0)
 529                                         fprintf(stderr, "Nothing to flush.\n");
 530 #endif
 531                                 fflush(stdout);
 532                                 return 0;
 533                         }
 534                         round++;
 535                         if (flush_update() < 0)
 536                                 exit(1);
 537                 }
 538         }
 539
 540         if (filter.family != AF_PACKET) {
 541                 if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 542                         bb_perror_msg_and_die("Cannot send dump request");
 543                 }
 544
 545                 if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
 546                         bb_error_msg_and_die("Dump terminated");
 547                 }
 548         }
 549
 550
 551         if (filter.family && filter.family != AF_PACKET) {
 552                 struct nlmsg_list **lp;
 553                 lp=&linfo;
 554
 555                 if (filter.oneline)
 556                         no_link = 1;
 557
 558                 while ((l=*lp)!=NULL) {
 559                         int ok = 0;
 560                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 561                         struct nlmsg_list *a;
 562
 563                         for (a=ainfo; a; a=a->next) {
 564                                 struct nlmsghdr *n = &a->h;
 565                                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 566
 567                                 if (ifa->ifa_index != ifi->ifi_index ||
 568                                     (filter.family && filter.family != ifa->ifa_family))
 569                                         continue;
 570                                 if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 571                                         continue;
 572                                 if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 573                                         continue;
 574                                 if (filter.pfx.family || filter.label) {
 575                                         struct rtattr *tb[IFA_MAX+1];
 576                                         memset(tb, 0, sizeof(tb));
 577                                         parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
 578                                         if (!tb[IFA_LOCAL])
 579                                                 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 580
 581                                         if (filter.pfx.family && tb[IFA_LOCAL]) {
 582                                                 inet_prefix dst;
 583                                                 memset(&dst, 0, sizeof(dst));
 584                                                 dst.family = ifa->ifa_family;
 585                                                 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
 586                                                 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 587                                                         continue;
 588                                         }
 589                                         if (filter.label) {
 590                                                 SPRINT_BUF(b1);
 591                                                 const char *label;
 592                                                 if (tb[IFA_LABEL])
 593                                                         label = RTA_DATA(tb[IFA_LABEL]);
 594                                                 else
 595                                                         label = ll_idx_n2a(ifa->ifa_index, b1);
 596                                                 if (fnmatch(filter.label, label, 0) != 0)
 597                                                         continue;
 598                                         }
 599                                 }
 600
 601                                 ok = 1;
 602                                 break;
 603                         }
 604                         if (!ok)
 605                                 *lp = l->next;
 606                         else
 607                                 lp = &l->next;
 608                 }
 609         }
 610
 611         for (l=linfo; l; l = l->next) {
 612                 if (no_link || print_linkinfo(NULL, &l->h, stdout) == 0) {
 613                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 614                         if (filter.family != AF_PACKET)
 615                                 print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
 616                 }
 617                 fflush(stdout);
 618         }
 619
 620         exit(0);
 621 }
 622
 623 static int default_scope(inet_prefix *lcl)
 624 {
 625         if (lcl->family == AF_INET) {
 626                 if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
 627                         return RT_SCOPE_HOST;
 628         }
 629         return 0;
 630 }
 631
 632 static int ipaddr_modify(int cmd, int argc, char **argv)
 633 {
 634         const char *option[] = { "peer", "remote", "broadcast", "brd",
 635                 "anycast", "scope", "dev", "label", "local", 0 };
 636         struct rtnl_handle rth;
 637         struct {
 638                 struct nlmsghdr         n;
 639                 struct ifaddrmsg        ifa;
 640                 char                    buf[256];
 641         } req;
 642         char  *d = NULL;
 643         char  *l = NULL;
 644         inet_prefix lcl;
 645         inet_prefix peer;
 646         int local_len = 0;
 647         int peer_len = 0;
 648         int brd_len = 0;
 649         int any_len = 0;
 650         int scoped = 0;
 651
 652         memset(&req, 0, sizeof(req));
 653
 654         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
 655         req.n.nlmsg_flags = NLM_F_REQUEST;
 656         req.n.nlmsg_type = cmd;
 657         req.ifa.ifa_family = preferred_family;
 658
 659         while (argc > 0) {
 660                 const unsigned short option_num = compare_string_array(option, *argv);
 661                 switch (option_num) {
 662                         case 0: /* peer */
 663                         case 1: /* remote */
 664                                 NEXT_ARG();
 665
 666                                 if (peer_len) {
 667                                         duparg("peer", *argv);
 668                                 }
 669                                 get_prefix(&peer, *argv, req.ifa.ifa_family);
 670                                 peer_len = peer.bytelen;
 671                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 672                                         req.ifa.ifa_family = peer.family;
 673                                 }
 674                                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
 675                                 req.ifa.ifa_prefixlen = peer.bitlen;
 676                                 break;
 677                         case 2: /* broadcast */
 678                         case 3: /* brd */
 679                         {
 680                                 inet_prefix addr;
 681                                 NEXT_ARG();
 682                                 if (brd_len) {
 683                                         duparg("broadcast", *argv);
 684                                 }
 685                                 if (strcmp(*argv, "+") == 0) {
 686                                         brd_len = -1;
 687                                 }
 688                                 else if (strcmp(*argv, "-") == 0) {
 689                                         brd_len = -2;
 690                                 } else {
 691                                         get_addr(&addr, *argv, req.ifa.ifa_family);
 692                                         if (req.ifa.ifa_family == AF_UNSPEC)
 693                                                 req.ifa.ifa_family = addr.family;
 694                                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
 695                                         brd_len = addr.bytelen;
 696                                 }
 697                                 break;
 698                         }
 699                         case 4: /* anycast */
 700                         {
 701                                 inet_prefix addr;
 702                                 NEXT_ARG();
 703                                 if (any_len) {
 704                                         duparg("anycast", *argv);
 705                                 }
 706                                 get_addr(&addr, *argv, req.ifa.ifa_family);
 707                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 708                                         req.ifa.ifa_family = addr.family;
 709                                 }
 710                                 addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
 711                                 any_len = addr.bytelen;
 712                                 break;
 713                         }
 714                         case 5: /* scope */
 715                         {
 716                                 int scope = 0;
 717                                 NEXT_ARG();
 718                                 if (rtnl_rtscope_a2n(&scope, *argv)) {
 719                                         invarg(*argv, "invalid scope value.");
 720                                 }
 721                                 req.ifa.ifa_scope = scope;
 722                                 scoped = 1;
 723                                 break;
 724                         }
 725                         case 6: /* dev */
 726                                 NEXT_ARG();
 727                                 d = *argv;
 728                                 break;
 729                         case 7: /* label */
 730                                 NEXT_ARG();
 731                                 l = *argv;
 732                                 addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
 733                                 break;
 734                         case 8: /* local */
 735                                 NEXT_ARG();
 736                         default:
 737                                 if (local_len) {
 738                                         duparg2("local", *argv);
 739                                 }
 740                                 get_prefix(&lcl, *argv, req.ifa.ifa_family);
 741                                 if (req.ifa.ifa_family == AF_UNSPEC) {
 742                                         req.ifa.ifa_family = lcl.family;
 743                                 }
 744                                 addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
 745                                 local_len = lcl.bytelen;
 746                 }
 747                 argc--;
 748                 argv++;
 749         }
 750
 751         if (d == NULL) {
 752                 bb_error_msg("Not enough information: \"dev\" argument is required.");
 753                 return -1;
 754         }
 755         if (l && matches(d, l) != 0) {
 756                 bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s).", d, l);
 757         }
 758
 759         if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
 760                 peer = lcl;
 761                 addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
 762         }
 763         if (req.ifa.ifa_prefixlen == 0)
 764                 req.ifa.ifa_prefixlen = lcl.bitlen;
 765
 766         if (brd_len < 0 && cmd != RTM_DELADDR) {
 767                 inet_prefix brd;
 768                 int i;
 769                 if (req.ifa.ifa_family != AF_INET) {
 770                         bb_error_msg("Broadcast can be set only for IPv4 addresses");
 771                         return -1;
 772                 }
 773                 brd = peer;
 774                 if (brd.bitlen <= 30) {
 775                         for (i=31; i>=brd.bitlen; i--) {
 776                                 if (brd_len == -1)
 777                                         brd.data[0] |= htonl(1<<(31-i));
 778                                 else
 779                                         brd.data[0] &= ~htonl(1<<(31-i));
 780                         }
 781                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
 782                         brd_len = brd.bytelen;
 783                 }
 784         }
 785         if (!scoped && cmd != RTM_DELADDR)
 786                 req.ifa.ifa_scope = default_scope(&lcl);
 787
 788         if (rtnl_open(&rth, 0) < 0)
 789                 exit(1);
 790
 791         ll_init_map(&rth);
 792
 793         if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
 794                 bb_error_msg("Cannot find device \"%s\"", d);
 795                 return -1;
 796         }
 797
 798         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 799                 exit(2);
 800
 801         exit(0);
 802 }
 803
 804 extern int do_ipaddr(int argc, char **argv)
 805 {
 806         const char *commands[] = { "add", "delete", "list", "show", "lst", "flush", 0 };
 807         unsigned short command_num = 2;
 808
 809         if (*argv) {
 810                 command_num = compare_string_array(commands, *argv);
 811         }
 812         switch (command_num) {
 813                 case 0: /* add */
 814                         return ipaddr_modify(RTM_NEWADDR, argc-1, argv+1);
 815                 case 1: /* delete */
 816                         return ipaddr_modify(RTM_DELADDR, argc-1, argv+1);
 817                 case 2: /* list */
 818                 case 3: /* show */
 819                 case 4: /* lst */
 820                         return ipaddr_list_or_flush(argc-1, argv+1, 0);
 821                 case 5: /* flush */
 822                         return ipaddr_list_or_flush(argc-1, argv+1, 1);
 823         }
 824         bb_error_msg_and_die("Unknown command %s", *argv);
 825 }