ip/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 <sys/errno.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 #include <string.h>
  27 #include <fnmatch.h>
  28
  29 #include <linux/netdevice.h>
  30 #include <linux/if_arp.h>
  31 #include <linux/sockios.h>
  32
  33 #include "rt_names.h"
  34 #include "utils.h"
  35 #include "ll_map.h"
  36 #include "ip_common.h"
  37
  38 #define MAX_ROUNDS 10
  39
  40 static struct
  41 {
  42         int ifindex;
  43         int family;
  44         int oneline;
  45         int showqueue;
  46         inet_prefix pfx;
  47         int scope, scopemask;
  48         int flags, flagmask;
  49         int up;
  50         char *label;
  51         int flushed;
  52         char *flushb;
  53         int flushp;
  54         int flushe;
  55 } filter;
  56
  57 static int do_link;
  58
  59 static void usage(void) __attribute__((noreturn));
  60
  61 static void usage(void)
  62 {
  63         if (do_link) {
  64                 iplink_usage();
  65         }
  66         fprintf(stderr, "Usage: ip addr {add|change|replace} IFADDR dev STRING [ LIFETIME ]\n");
  67         fprintf(stderr, "                                                      [ CONFFLAG-LIST]\n");
  68         fprintf(stderr, "       ip addr del IFADDR dev STRING\n");
  69         fprintf(stderr, "       ip addr {show|flush} [ dev STRING ] [ scope SCOPE-ID ]\n");
  70         fprintf(stderr, "                            [ to PREFIX ] [ FLAG-LIST ] [ label PATTERN ]\n");
  71         fprintf(stderr, "IFADDR := PREFIX | ADDR peer PREFIX\n");
  72         fprintf(stderr, "          [ broadcast ADDR ] [ anycast ADDR ]\n");
  73         fprintf(stderr, "          [ label STRING ] [ scope SCOPE-ID ]\n");
  74         fprintf(stderr, "SCOPE-ID := [ host | link | global | NUMBER ]\n");
  75         fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] FLAG\n");
  76         fprintf(stderr, "FLAG  := [ permanent | dynamic | secondary | primary |\n");
  77         fprintf(stderr, "           tentative | deprecated | CONFFLAG-LIST ]\n");
  78         fprintf(stderr, "CONFFLAG-LIST := [ CONFFLAG-LIST ] CONFFLAG\n");
  79         fprintf(stderr, "CONFFLAG  := [ home | nodad ]\n");
  80         fprintf(stderr, "LIFETIME := [ valid_lft LFT ] [ preferred_lft LFT ]\n");
  81         fprintf(stderr, "LFT := forever | SECONDS\n");
  82
  83         exit(-1);
  84 }
  85
  86 void print_link_flags(FILE *fp, unsigned flags, unsigned mdown)
  87 {
  88         fprintf(fp, "<");
  89         if (flags & IFF_UP && !(flags & IFF_RUNNING))
  90                 fprintf(fp, "NO-CARRIER%s", flags ? "," : "");
  91         flags &= ~IFF_RUNNING;
  92 #define _PF(f) if (flags&IFF_##f) { \
  93                   flags &= ~IFF_##f ; \
  94                   fprintf(fp, #f "%s", flags ? "," : ""); }
  95         _PF(LOOPBACK);
  96         _PF(BROADCAST);
  97         _PF(POINTOPOINT);
  98         _PF(MULTICAST);
  99         _PF(NOARP);
 100         _PF(ALLMULTI);
 101         _PF(PROMISC);
 102         _PF(MASTER);
 103         _PF(SLAVE);
 104         _PF(DEBUG);
 105         _PF(DYNAMIC);
 106         _PF(AUTOMEDIA);
 107         _PF(PORTSEL);
 108         _PF(NOTRAILERS);
 109         _PF(UP);
 110         _PF(LOWER_UP);
 111         _PF(DORMANT);
 112 #undef _PF
 113         if (flags)
 114                 fprintf(fp, "%x", flags);
 115         if (mdown)
 116                 fprintf(fp, ",M-DOWN");
 117         fprintf(fp, "> ");
 118 }
 119
 120 static const char *oper_states[] = {
 121         "UNKNOWN", "NOTPRESENT", "DOWN", "LOWERLAYERDOWN",
 122         "TESTING", "DORMANT",    "UP"
 123 };
 124
 125 static void print_operstate(FILE *f, __u8 state)
 126 {
 127         if (state >= sizeof(oper_states)/sizeof(oper_states[0]))
 128                 fprintf(f, "state %#x ", state);
 129         else
 130                 fprintf(f, "state %s ", oper_states[state]);
 131 }
 132
 133 static void print_queuelen(FILE *f, const char *name)
 134 {
 135         struct ifreq ifr;
 136         int s;
 137
 138         s = socket(AF_INET, SOCK_STREAM, 0);
 139         if (s < 0)
 140                 return;
 141
 142         memset(&ifr, 0, sizeof(ifr));
 143         strcpy(ifr.ifr_name, name);
 144         if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
 145                 fprintf(f, "ioctl(SIOCGIFXQLEN) failed: %s\n", strerror(errno));
 146                 close(s);
 147                 return;
 148         }
 149         close(s);
 150
 151         if (ifr.ifr_qlen)
 152                 fprintf(f, "qlen %d", ifr.ifr_qlen);
 153 }
 154
 155 static void print_linktype(FILE *fp, struct rtattr *tb)
 156 {
 157         struct rtattr *linkinfo[IFLA_INFO_MAX+1];
 158         struct link_util *lu;
 159         char *kind;
 160
 161         parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb);
 162
 163         if (!linkinfo[IFLA_INFO_KIND])
 164                 return;
 165         kind = RTA_DATA(linkinfo[IFLA_INFO_KIND]);
 166
 167         fprintf(fp, "%s", _SL_);
 168         fprintf(fp, "    %s ", kind);
 169
 170         lu = get_link_kind(kind);
 171         if (!lu || !lu->print_opt)
 172                 return;
 173
 174         if (1) {
 175                 struct rtattr *attr[lu->maxattr+1], **data = NULL;
 176
 177                 if (linkinfo[IFLA_INFO_DATA]) {
 178                         parse_rtattr_nested(attr, lu->maxattr,
 179                                             linkinfo[IFLA_INFO_DATA]);
 180                         data = attr;
 181                 }
 182                 lu->print_opt(lu, fp, data);
 183
 184                 if (linkinfo[IFLA_INFO_XSTATS] && show_stats &&
 185                     lu->print_xstats)
 186                         lu->print_xstats(lu, fp, linkinfo[IFLA_INFO_XSTATS]);
 187         }
 188 }
 189
 190 int print_linkinfo(const struct sockaddr_nl *who,
 191                    struct nlmsghdr *n, void *arg)
 192 {
 193         FILE *fp = (FILE*)arg;
 194         struct ifinfomsg *ifi = NLMSG_DATA(n);
 195         struct rtattr * tb[IFLA_MAX+1];
 196         int len = n->nlmsg_len;
 197         unsigned m_flag = 0;
 198
 199         if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
 200                 return 0;
 201
 202         len -= NLMSG_LENGTH(sizeof(*ifi));
 203         if (len < 0)
 204                 return -1;
 205
 206         if (filter.ifindex && ifi->ifi_index != filter.ifindex)
 207                 return 0;
 208         if (filter.up && !(ifi->ifi_flags&IFF_UP))
 209                 return 0;
 210
 211         parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
 212         if (tb[IFLA_IFNAME] == NULL) {
 213                 fprintf(stderr, "BUG: nil ifname\n");
 214                 return -1;
 215         }
 216         if (filter.label &&
 217             (!filter.family || filter.family == AF_PACKET) &&
 218             fnmatch(filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0))
 219                 return 0;
 220
 221         if (n->nlmsg_type == RTM_DELLINK)
 222                 fprintf(fp, "Deleted ");
 223
 224         fprintf(fp, "%d: %s", ifi->ifi_index,
 225                 tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>");
 226
 227         if (tb[IFLA_LINK]) {
 228                 SPRINT_BUF(b1);
 229                 int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
 230                 if (iflink == 0)
 231                         fprintf(fp, "@NONE: ");
 232                 else {
 233                         fprintf(fp, "@%s: ", ll_idx_n2a(iflink, b1));
 234                         m_flag = ll_index_to_flags(iflink);
 235                         m_flag = !(m_flag & IFF_UP);
 236                 }
 237         } else {
 238                 fprintf(fp, ": ");
 239         }
 240         print_link_flags(fp, ifi->ifi_flags, m_flag);
 241
 242         if (tb[IFLA_MTU])
 243                 fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
 244         if (tb[IFLA_QDISC])
 245                 fprintf(fp, "qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
 246 #ifdef IFLA_MASTER
 247         if (tb[IFLA_MASTER]) {
 248                 SPRINT_BUF(b1);
 249                 fprintf(fp, "master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
 250         }
 251 #endif
 252         if (tb[IFLA_OPERSTATE])
 253                 print_operstate(fp, *(__u8 *)RTA_DATA(tb[IFLA_OPERSTATE]));
 254
 255         if (filter.showqueue)
 256                 print_queuelen(fp, (char*)RTA_DATA(tb[IFLA_IFNAME]));
 257
 258         if (!filter.family || filter.family == AF_PACKET) {
 259                 SPRINT_BUF(b1);
 260                 fprintf(fp, "%s", _SL_);
 261                 fprintf(fp, "    link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
 262
 263                 if (tb[IFLA_ADDRESS]) {
 264                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
 265                                                       RTA_PAYLOAD(tb[IFLA_ADDRESS]),
 266                                                       ifi->ifi_type,
 267                                                       b1, sizeof(b1)));
 268                 }
 269                 if (tb[IFLA_BROADCAST]) {
 270                         if (ifi->ifi_flags&IFF_POINTOPOINT)
 271                                 fprintf(fp, " peer ");
 272                         else
 273                                 fprintf(fp, " brd ");
 274                         fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
 275                                                       RTA_PAYLOAD(tb[IFLA_BROADCAST]),
 276                                                       ifi->ifi_type,
 277                                                       b1, sizeof(b1)));
 278                 }
 279         }
 280
 281         if (do_link && tb[IFLA_LINKINFO] && show_details)
 282                 print_linktype(fp, tb[IFLA_LINKINFO]);
 283
 284         if (do_link && tb[IFLA_STATS] && show_stats) {
 285                 struct rtnl_link_stats slocal;
 286                 struct rtnl_link_stats *s = RTA_DATA(tb[IFLA_STATS]);
 287                 if (((unsigned long)s) & (sizeof(unsigned long)-1)) {
 288                         memcpy(&slocal, s, sizeof(slocal));
 289                         s = &slocal;
 290                 }
 291                 fprintf(fp, "%s", _SL_);
 292                 fprintf(fp, "    RX: bytes  packets  errors  dropped overrun mcast   %s%s",
 293                         s->rx_compressed ? "compressed" : "", _SL_);
 294                 fprintf(fp, "    %-10u %-8u %-7u %-7u %-7u %-7u",
 295                         s->rx_bytes, s->rx_packets, s->rx_errors,
 296                         s->rx_dropped, s->rx_over_errors,
 297                         s->multicast
 298                         );
 299                 if (s->rx_compressed)
 300                         fprintf(fp, " %-7u", s->rx_compressed);
 301                 if (show_stats > 1) {
 302                         fprintf(fp, "%s", _SL_);
 303                         fprintf(fp, "    RX errors: length  crc     frame   fifo    missed%s", _SL_);
 304                         fprintf(fp, "               %-7u  %-7u %-7u %-7u %-7u",
 305                                 s->rx_length_errors,
 306                                 s->rx_crc_errors,
 307                                 s->rx_frame_errors,
 308                                 s->rx_fifo_errors,
 309                                 s->rx_missed_errors
 310                                 );
 311                 }
 312                 fprintf(fp, "%s", _SL_);
 313                 fprintf(fp, "    TX: bytes  packets  errors  dropped carrier collsns %s%s",
 314                         s->tx_compressed ? "compressed" : "", _SL_);
 315                 fprintf(fp, "    %-10u %-8u %-7u %-7u %-7u %-7u",
 316                         s->tx_bytes, s->tx_packets, s->tx_errors,
 317                         s->tx_dropped, s->tx_carrier_errors, s->collisions);
 318                 if (s->tx_compressed)
 319                         fprintf(fp, " %-7u", s->tx_compressed);
 320                 if (show_stats > 1) {
 321                         fprintf(fp, "%s", _SL_);
 322                         fprintf(fp, "    TX errors: aborted fifo    window  heartbeat%s", _SL_);
 323                         fprintf(fp, "               %-7u  %-7u %-7u %-7u",
 324                                 s->tx_aborted_errors,
 325                                 s->tx_fifo_errors,
 326                                 s->tx_window_errors,
 327                                 s->tx_heartbeat_errors
 328                                 );
 329                 }
 330         }
 331         fprintf(fp, "\n");
 332         fflush(fp);
 333         return 0;
 334 }
 335
 336 static int flush_update(void)
 337 {
 338         if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
 339                 perror("Failed to send flush request");
 340                 return -1;
 341         }
 342         filter.flushp = 0;
 343         return 0;
 344 }
 345
 346 static int set_lifetime(unsigned int *lifetime, char *argv)
 347 {
 348         if (strcmp(argv, "forever") == 0)
 349                 *lifetime = INFINITY_LIFE_TIME;
 350         else if (get_u32(lifetime, argv, 0))
 351                 return -1;
 352
 353         return 0;
 354 }
 355
 356 int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 357                    void *arg)
 358 {
 359         FILE *fp = (FILE*)arg;
 360         struct ifaddrmsg *ifa = NLMSG_DATA(n);
 361         int len = n->nlmsg_len;
 362         int deprecated = 0;
 363         struct rtattr * rta_tb[IFA_MAX+1];
 364         char abuf[256];
 365         SPRINT_BUF(b1);
 366
 367         if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
 368                 return 0;
 369         len -= NLMSG_LENGTH(sizeof(*ifa));
 370         if (len < 0) {
 371                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 372                 return -1;
 373         }
 374
 375         if (filter.flushb && n->nlmsg_type != RTM_NEWADDR)
 376                 return 0;
 377
 378         parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
 379
 380         if (!rta_tb[IFA_LOCAL])
 381                 rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
 382         if (!rta_tb[IFA_ADDRESS])
 383                 rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
 384
 385         if (filter.ifindex && filter.ifindex != ifa->ifa_index)
 386                 return 0;
 387         if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 388                 return 0;
 389         if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 390                 return 0;
 391         if (filter.label) {
 392                 SPRINT_BUF(b1);
 393                 const char *label;
 394                 if (rta_tb[IFA_LABEL])
 395                         label = RTA_DATA(rta_tb[IFA_LABEL]);
 396                 else
 397                         label = ll_idx_n2a(ifa->ifa_index, b1);
 398                 if (fnmatch(filter.label, label, 0) != 0)
 399                         return 0;
 400         }
 401         if (filter.pfx.family) {
 402                 if (rta_tb[IFA_LOCAL]) {
 403                         inet_prefix dst;
 404                         memset(&dst, 0, sizeof(dst));
 405                         dst.family = ifa->ifa_family;
 406                         memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
 407                         if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 408                                 return 0;
 409                 }
 410         }
 411
 412         if (filter.family && filter.family != ifa->ifa_family)
 413                 return 0;
 414
 415         if (filter.flushb) {
 416                 struct nlmsghdr *fn;
 417                 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
 418                         if (flush_update())
 419                                 return -1;
 420                 }
 421                 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
 422                 memcpy(fn, n, n->nlmsg_len);
 423                 fn->nlmsg_type = RTM_DELADDR;
 424                 fn->nlmsg_flags = NLM_F_REQUEST;
 425                 fn->nlmsg_seq = ++rth.seq;
 426                 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
 427                 filter.flushed++;
 428                 if (show_stats < 2)
 429                         return 0;
 430         }
 431
 432         if (n->nlmsg_type == RTM_DELADDR)
 433                 fprintf(fp, "Deleted ");
 434
 435         if (filter.oneline || filter.flushb)
 436                 fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
 437         if (ifa->ifa_family == AF_INET)
 438                 fprintf(fp, "    inet ");
 439         else if (ifa->ifa_family == AF_INET6)
 440                 fprintf(fp, "    inet6 ");
 441         else if (ifa->ifa_family == AF_DECnet)
 442                 fprintf(fp, "    dnet ");
 443         else if (ifa->ifa_family == AF_IPX)
 444                 fprintf(fp, "     ipx ");
 445         else
 446                 fprintf(fp, "    family %d ", ifa->ifa_family);
 447
 448         if (rta_tb[IFA_LOCAL]) {
 449                 fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
 450                                               RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
 451                                               RTA_DATA(rta_tb[IFA_LOCAL]),
 452                                               abuf, sizeof(abuf)));
 453
 454                 if (rta_tb[IFA_ADDRESS] == NULL ||
 455                     memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
 456                         fprintf(fp, "/%d ", ifa->ifa_prefixlen);
 457                 } else {
 458                         fprintf(fp, " peer %s/%d ",
 459                                 rt_addr_n2a(ifa->ifa_family,
 460                                             RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
 461                                             RTA_DATA(rta_tb[IFA_ADDRESS]),
 462                                             abuf, sizeof(abuf)),
 463                                 ifa->ifa_prefixlen);
 464                 }
 465         }
 466
 467         if (rta_tb[IFA_BROADCAST]) {
 468                 fprintf(fp, "brd %s ",
 469                         rt_addr_n2a(ifa->ifa_family,
 470                                     RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
 471                                     RTA_DATA(rta_tb[IFA_BROADCAST]),
 472                                     abuf, sizeof(abuf)));
 473         }
 474         if (rta_tb[IFA_ANYCAST]) {
 475                 fprintf(fp, "any %s ",
 476                         rt_addr_n2a(ifa->ifa_family,
 477                                     RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
 478                                     RTA_DATA(rta_tb[IFA_ANYCAST]),
 479                                     abuf, sizeof(abuf)));
 480         }
 481         fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
 482         if (ifa->ifa_flags&IFA_F_SECONDARY) {
 483                 ifa->ifa_flags &= ~IFA_F_SECONDARY;
 484                 fprintf(fp, "secondary ");
 485         }
 486         if (ifa->ifa_flags&IFA_F_TENTATIVE) {
 487                 ifa->ifa_flags &= ~IFA_F_TENTATIVE;
 488                 fprintf(fp, "tentative ");
 489         }
 490         if (ifa->ifa_flags&IFA_F_DEPRECATED) {
 491                 ifa->ifa_flags &= ~IFA_F_DEPRECATED;
 492                 deprecated = 1;
 493                 fprintf(fp, "deprecated ");
 494         }
 495         if (ifa->ifa_flags&IFA_F_HOMEADDRESS) {
 496                 ifa->ifa_flags &= ~IFA_F_HOMEADDRESS;
 497                 fprintf(fp, "home ");
 498         }
 499         if (ifa->ifa_flags&IFA_F_NODAD) {
 500                 ifa->ifa_flags &= ~IFA_F_NODAD;
 501                 fprintf(fp, "nodad ");
 502         }
 503         if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
 504                 fprintf(fp, "dynamic ");
 505         } else
 506                 ifa->ifa_flags &= ~IFA_F_PERMANENT;
 507         if (ifa->ifa_flags)
 508                 fprintf(fp, "flags %02x ", ifa->ifa_flags);
 509         if (rta_tb[IFA_LABEL])
 510                 fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
 511         if (rta_tb[IFA_CACHEINFO]) {
 512                 struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
 513                 char buf[128];
 514                 fprintf(fp, "%s", _SL_);
 515                 if (ci->ifa_valid == INFINITY_LIFE_TIME)
 516                         sprintf(buf, "valid_lft forever");
 517                 else
 518                         sprintf(buf, "valid_lft %usec", ci->ifa_valid);
 519                 if (ci->ifa_prefered == INFINITY_LIFE_TIME)
 520                         sprintf(buf+strlen(buf), " preferred_lft forever");
 521                 else {
 522                         if (deprecated)
 523                                 sprintf(buf+strlen(buf), " preferred_lft %dsec",
 524                                         ci->ifa_prefered);
 525                         else
 526                                 sprintf(buf+strlen(buf), " preferred_lft %usec",
 527                                         ci->ifa_prefered);
 528                 }
 529                 fprintf(fp, "       %s", buf);
 530         }
 531         fprintf(fp, "\n");
 532         fflush(fp);
 533         return 0;
 534 }
 535
 536
 537 struct nlmsg_list
 538 {
 539         struct nlmsg_list *next;
 540         struct nlmsghdr   h;
 541 };
 542
 543 static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
 544 {
 545         for ( ;ainfo ;  ainfo = ainfo->next) {
 546                 struct nlmsghdr *n = &ainfo->h;
 547                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 548
 549                 if (n->nlmsg_type != RTM_NEWADDR)
 550                         continue;
 551
 552                 if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
 553                         return -1;
 554
 555                 if (ifa->ifa_index != ifindex ||
 556                     (filter.family && filter.family != ifa->ifa_family))
 557                         continue;
 558
 559                 print_addrinfo(NULL, n, fp);
 560         }
 561         return 0;
 562 }
 563
 564
 565 static int store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n,
 566                        void *arg)
 567 {
 568         struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
 569         struct nlmsg_list *h;
 570         struct nlmsg_list **lp;
 571
 572         h = malloc(n->nlmsg_len+sizeof(void*));
 573         if (h == NULL)
 574                 return -1;
 575
 576         memcpy(&h->h, n, n->nlmsg_len);
 577         h->next = NULL;
 578
 579         for (lp = linfo; *lp; lp = &(*lp)->next) /* NOTHING */;
 580         *lp = h;
 581
 582         ll_remember_index(who, n, NULL);
 583         return 0;
 584 }
 585
 586 static int ipaddr_list_or_flush(int argc, char **argv, int flush)
 587 {
 588         struct nlmsg_list *linfo = NULL;
 589         struct nlmsg_list *ainfo = NULL;
 590         struct nlmsg_list *l, *n;
 591         char *filter_dev = NULL;
 592         int no_link = 0;
 593
 594         ipaddr_reset_filter(oneline);
 595         filter.showqueue = 1;
 596
 597         if (filter.family == AF_UNSPEC)
 598                 filter.family = preferred_family;
 599
 600         if (flush) {
 601                 if (argc <= 0) {
 602                         fprintf(stderr, "Flush requires arguments.\n");
 603                         return -1;
 604                 }
 605                 if (filter.family == AF_PACKET) {
 606                         fprintf(stderr, "Cannot flush link addresses.\n");
 607                         return -1;
 608                 }
 609         }
 610
 611         while (argc > 0) {
 612                 if (strcmp(*argv, "to") == 0) {
 613                         NEXT_ARG();
 614                         get_prefix(&filter.pfx, *argv, filter.family);
 615                         if (filter.family == AF_UNSPEC)
 616                                 filter.family = filter.pfx.family;
 617                 } else if (strcmp(*argv, "scope") == 0) {
 618                         unsigned scope = 0;
 619                         NEXT_ARG();
 620                         filter.scopemask = -1;
 621                         if (rtnl_rtscope_a2n(&scope, *argv)) {
 622                                 if (strcmp(*argv, "all") != 0)
 623                                         invarg("invalid \"scope\"\n", *argv);
 624                                 scope = RT_SCOPE_NOWHERE;
 625                                 filter.scopemask = 0;
 626                         }
 627                         filter.scope = scope;
 628                 } else if (strcmp(*argv, "up") == 0) {
 629                         filter.up = 1;
 630                 } else if (strcmp(*argv, "dynamic") == 0) {
 631                         filter.flags &= ~IFA_F_PERMANENT;
 632                         filter.flagmask |= IFA_F_PERMANENT;
 633                 } else if (strcmp(*argv, "permanent") == 0) {
 634                         filter.flags |= IFA_F_PERMANENT;
 635                         filter.flagmask |= IFA_F_PERMANENT;
 636                 } else if (strcmp(*argv, "secondary") == 0) {
 637                         filter.flags |= IFA_F_SECONDARY;
 638                         filter.flagmask |= IFA_F_SECONDARY;
 639                 } else if (strcmp(*argv, "primary") == 0) {
 640                         filter.flags &= ~IFA_F_SECONDARY;
 641                         filter.flagmask |= IFA_F_SECONDARY;
 642                 } else if (strcmp(*argv, "tentative") == 0) {
 643                         filter.flags |= IFA_F_TENTATIVE;
 644                         filter.flagmask |= IFA_F_TENTATIVE;
 645                 } else if (strcmp(*argv, "deprecated") == 0) {
 646                         filter.flags |= IFA_F_DEPRECATED;
 647                         filter.flagmask |= IFA_F_DEPRECATED;
 648                 } else if (strcmp(*argv, "home") == 0) {
 649                         filter.flags |= IFA_F_HOMEADDRESS;
 650                         filter.flagmask |= IFA_F_HOMEADDRESS;
 651                 } else if (strcmp(*argv, "nodad") == 0) {
 652                         filter.flags |= IFA_F_NODAD;
 653                         filter.flagmask |= IFA_F_NODAD;
 654                 } else if (strcmp(*argv, "label") == 0) {
 655                         NEXT_ARG();
 656                         filter.label = *argv;
 657                 } else {
 658                         if (strcmp(*argv, "dev") == 0) {
 659                                 NEXT_ARG();
 660                         }
 661                         if (matches(*argv, "help") == 0)
 662                                 usage();
 663                         if (filter_dev)
 664                                 duparg2("dev", *argv);
 665                         filter_dev = *argv;
 666                 }
 667                 argv++; argc--;
 668         }
 669
 670         if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
 671                 perror("Cannot send dump request");
 672                 exit(1);
 673         }
 674
 675         if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
 676                 fprintf(stderr, "Dump terminated\n");
 677                 exit(1);
 678         }
 679
 680         if (filter_dev) {
 681                 filter.ifindex = ll_name_to_index(filter_dev);
 682                 if (filter.ifindex <= 0) {
 683                         fprintf(stderr, "Device \"%s\" does not exist.\n", filter_dev);
 684                         return -1;
 685                 }
 686         }
 687
 688         if (flush) {
 689                 int round = 0;
 690                 char flushb[4096-512];
 691
 692                 filter.flushb = flushb;
 693                 filter.flushp = 0;
 694                 filter.flushe = sizeof(flushb);
 695
 696                 while (round < MAX_ROUNDS) {
 697                         if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 698                                 perror("Cannot send dump request");
 699                                 exit(1);
 700                         }
 701                         filter.flushed = 0;
 702                         if (rtnl_dump_filter(&rth, print_addrinfo, stdout, NULL, NULL) < 0) {
 703                                 fprintf(stderr, "Flush terminated\n");
 704                                 exit(1);
 705                         }
 706                         if (filter.flushed == 0) {
 707                                 if (show_stats) {
 708                                         if (round == 0)
 709                                                 printf("Nothing to flush.\n");
 710                                         else
 711                                                 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
 712                                 }
 713                                 fflush(stdout);
 714                                 return 0;
 715                         }
 716                         round++;
 717                         if (flush_update() < 0)
 718                                 return 1;
 719
 720                         if (show_stats) {
 721                                 printf("\n*** Round %d, deleting %d addresses ***\n", round, filter.flushed);
 722                                 fflush(stdout);
 723                         }
 724                 }
 725                 fprintf(stderr, "*** Flush remains incomplete after %d rounds. ***\n", MAX_ROUNDS); fflush(stderr);
 726                 return 1;
 727         }
 728
 729         if (filter.family != AF_PACKET) {
 730                 if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 731                         perror("Cannot send dump request");
 732                         exit(1);
 733                 }
 734
 735                 if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
 736                         fprintf(stderr, "Dump terminated\n");
 737                         exit(1);
 738                 }
 739         }
 740
 741
 742         if (filter.family && filter.family != AF_PACKET) {
 743                 struct nlmsg_list **lp;
 744                 lp=&linfo;
 745
 746                 if (filter.oneline)
 747                         no_link = 1;
 748
 749                 while ((l=*lp)!=NULL) {
 750                         int ok = 0;
 751                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 752                         struct nlmsg_list *a;
 753
 754                         for (a=ainfo; a; a=a->next) {
 755                                 struct nlmsghdr *n = &a->h;
 756                                 struct ifaddrmsg *ifa = NLMSG_DATA(n);
 757
 758                                 if (ifa->ifa_index != ifi->ifi_index ||
 759                                     (filter.family && filter.family != ifa->ifa_family))
 760                                         continue;
 761                                 if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
 762                                         continue;
 763                                 if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
 764                                         continue;
 765                                 if (filter.pfx.family || filter.label) {
 766                                         struct rtattr *tb[IFA_MAX+1];
 767                                         parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
 768                                         if (!tb[IFA_LOCAL])
 769                                                 tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 770
 771                                         if (filter.pfx.family && tb[IFA_LOCAL]) {
 772                                                 inet_prefix dst;
 773                                                 memset(&dst, 0, sizeof(dst));
 774                                                 dst.family = ifa->ifa_family;
 775                                                 memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
 776                                                 if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
 777                                                         continue;
 778                                         }
 779                                         if (filter.label) {
 780                                                 SPRINT_BUF(b1);
 781                                                 const char *label;
 782                                                 if (tb[IFA_LABEL])
 783                                                         label = RTA_DATA(tb[IFA_LABEL]);
 784                                                 else
 785                                                         label = ll_idx_n2a(ifa->ifa_index, b1);
 786                                                 if (fnmatch(filter.label, label, 0) != 0)
 787                                                         continue;
 788                                         }
 789                                 }
 790
 791                                 ok = 1;
 792                                 break;
 793                         }
 794                         if (!ok)
 795                                 *lp = l->next;
 796                         else
 797                                 lp = &l->next;
 798                 }
 799         }
 800
 801         for (l=linfo; l; l = n) {
 802                 n = l->next;
 803                 if (no_link || print_linkinfo(NULL, &l->h, stdout) == 0) {
 804                         struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
 805                         if (filter.family != AF_PACKET)
 806                                 print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
 807                 }
 808                 fflush(stdout);
 809                 free(l);
 810         }
 811
 812         return 0;
 813 }
 814
 815 int ipaddr_list_link(int argc, char **argv)
 816 {
 817         preferred_family = AF_PACKET;
 818         do_link = 1;
 819         return ipaddr_list_or_flush(argc, argv, 0);
 820 }
 821
 822 void ipaddr_reset_filter(int oneline)
 823 {
 824         memset(&filter, 0, sizeof(filter));
 825         filter.oneline = oneline;
 826 }
 827
 828 static int default_scope(inet_prefix *lcl)
 829 {
 830         if (lcl->family == AF_INET) {
 831                 if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
 832                         return RT_SCOPE_HOST;
 833         }
 834         return 0;
 835 }
 836
 837 static int ipaddr_modify(int cmd, int flags, int argc, char **argv)
 838 {
 839         struct {
 840                 struct nlmsghdr         n;
 841                 struct ifaddrmsg        ifa;
 842                 char                    buf[256];
 843         } req;
 844         char  *d = NULL;
 845         char  *l = NULL;
 846         char  *lcl_arg = NULL;
 847         char  *valid_lftp = NULL;
 848         char  *preferred_lftp = NULL;
 849         inet_prefix lcl;
 850         inet_prefix peer;
 851         int local_len = 0;
 852         int peer_len = 0;
 853         int brd_len = 0;
 854         int any_len = 0;
 855         int scoped = 0;
 856         __u32 preferred_lft = INFINITY_LIFE_TIME;
 857         __u32 valid_lft = INFINITY_LIFE_TIME;
 858         struct ifa_cacheinfo cinfo;
 859
 860         memset(&req, 0, sizeof(req));
 861
 862         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
 863         req.n.nlmsg_flags = NLM_F_REQUEST | flags;
 864         req.n.nlmsg_type = cmd;
 865         req.ifa.ifa_family = preferred_family;
 866
 867         while (argc > 0) {
 868                 if (strcmp(*argv, "peer") == 0 ||
 869                     strcmp(*argv, "remote") == 0) {
 870                         NEXT_ARG();
 871
 872                         if (peer_len)
 873                                 duparg("peer", *argv);
 874                         get_prefix(&peer, *argv, req.ifa.ifa_family);
 875                         peer_len = peer.bytelen;
 876                         if (req.ifa.ifa_family == AF_UNSPEC)
 877                                 req.ifa.ifa_family = peer.family;
 878                         addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
 879                         req.ifa.ifa_prefixlen = peer.bitlen;
 880                 } else if (matches(*argv, "broadcast") == 0 ||
 881                            strcmp(*argv, "brd") == 0) {
 882                         inet_prefix addr;
 883                         NEXT_ARG();
 884                         if (brd_len)
 885                                 duparg("broadcast", *argv);
 886                         if (strcmp(*argv, "+") == 0)
 887                                 brd_len = -1;
 888                         else if (strcmp(*argv, "-") == 0)
 889                                 brd_len = -2;
 890                         else {
 891                                 get_addr(&addr, *argv, req.ifa.ifa_family);
 892                                 if (req.ifa.ifa_family == AF_UNSPEC)
 893                                         req.ifa.ifa_family = addr.family;
 894                                 addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
 895                                 brd_len = addr.bytelen;
 896                         }
 897                 } else if (strcmp(*argv, "anycast") == 0) {
 898                         inet_prefix addr;
 899                         NEXT_ARG();
 900                         if (any_len)
 901                                 duparg("anycast", *argv);
 902                         get_addr(&addr, *argv, req.ifa.ifa_family);
 903                         if (req.ifa.ifa_family == AF_UNSPEC)
 904                                 req.ifa.ifa_family = addr.family;
 905                         addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
 906                         any_len = addr.bytelen;
 907                 } else if (strcmp(*argv, "scope") == 0) {
 908                         unsigned scope = 0;
 909                         NEXT_ARG();
 910                         if (rtnl_rtscope_a2n(&scope, *argv))
 911                                 invarg(*argv, "invalid scope value.");
 912                         req.ifa.ifa_scope = scope;
 913                         scoped = 1;
 914                 } else if (strcmp(*argv, "dev") == 0) {
 915                         NEXT_ARG();
 916                         d = *argv;
 917                 } else if (strcmp(*argv, "label") == 0) {
 918                         NEXT_ARG();
 919                         l = *argv;
 920                         addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
 921                 } else if (matches(*argv, "valid_lft") == 0) {
 922                         if (valid_lftp)
 923                                 duparg("valid_lft", *argv);
 924                         NEXT_ARG();
 925                         valid_lftp = *argv;
 926                         if (set_lifetime(&valid_lft, *argv))
 927                                 invarg("valid_lft value", *argv);
 928                 } else if (matches(*argv, "preferred_lft") == 0) {
 929                         if (preferred_lftp)
 930                                 duparg("preferred_lft", *argv);
 931                         NEXT_ARG();
 932                         preferred_lftp = *argv;
 933                         if (set_lifetime(&preferred_lft, *argv))
 934                                 invarg("preferred_lft value", *argv);
 935                 } else if (strcmp(*argv, "home") == 0) {
 936                         req.ifa.ifa_flags |= IFA_F_HOMEADDRESS;
 937                 } else if (strcmp(*argv, "nodad") == 0) {
 938                         req.ifa.ifa_flags |= IFA_F_NODAD;
 939                 } else {
 940                         if (strcmp(*argv, "local") == 0) {
 941                                 NEXT_ARG();
 942                         }
 943                         if (matches(*argv, "help") == 0)
 944                                 usage();
 945                         if (local_len)
 946                                 duparg2("local", *argv);
 947                         lcl_arg = *argv;
 948                         get_prefix(&lcl, *argv, req.ifa.ifa_family);
 949                         if (req.ifa.ifa_family == AF_UNSPEC)
 950                                 req.ifa.ifa_family = lcl.family;
 951                         addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
 952                         local_len = lcl.bytelen;
 953                 }
 954                 argc--; argv++;
 955         }
 956         if (d == NULL) {
 957                 fprintf(stderr, "Not enough information: \"dev\" argument is required.\n");
 958                 return -1;
 959         }
 960         if (l && matches(d, l) != 0) {
 961                 fprintf(stderr, "\"dev\" (%s) must match \"label\" (%s).\n", d, l);
 962                 exit(1);
 963         }
 964
 965         if (peer_len == 0 && local_len) {
 966                 if (cmd == RTM_DELADDR && lcl.family == AF_INET && !(lcl.flags & PREFIXLEN_SPECIFIED)) {
 967                         fprintf(stderr,
 968                             "Warning: Executing wildcard deletion to stay compatible with old scripts.\n" \
 969                             "         Explicitly specify the prefix length (%s/%d) to avoid this warning.\n" \
 970                             "         This special behaviour is likely to disappear in further releases,\n" \
 971                             "         fix your scripts!\n", lcl_arg, local_len*8);
 972                 } else {
 973                         peer = lcl;
 974                         addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
 975                 }
 976         }
 977         if (req.ifa.ifa_prefixlen == 0)
 978                 req.ifa.ifa_prefixlen = lcl.bitlen;
 979
 980         if (brd_len < 0 && cmd != RTM_DELADDR) {
 981                 inet_prefix brd;
 982                 int i;
 983                 if (req.ifa.ifa_family != AF_INET) {
 984                         fprintf(stderr, "Broadcast can be set only for IPv4 addresses\n");
 985                         return -1;
 986                 }
 987                 brd = peer;
 988                 if (brd.bitlen <= 30) {
 989                         for (i=31; i>=brd.bitlen; i--) {
 990                                 if (brd_len == -1)
 991                                         brd.data[0] |= htonl(1<<(31-i));
 992                                 else
 993                                         brd.data[0] &= ~htonl(1<<(31-i));
 994                         }
 995                         addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
 996                         brd_len = brd.bytelen;
 997                 }
 998         }
 999         if (!scoped && cmd != RTM_DELADDR)
1000                 req.ifa.ifa_scope = default_scope(&lcl);
1001
1002         ll_init_map(&rth);
1003
1004         if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
1005                 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1006                 return -1;
1007         }
1008
1009         if (valid_lftp || preferred_lftp) {
1010                 if (!valid_lft) {
1011                         fprintf(stderr, "valid_lft is zero\n");
1012                         return -1;
1013                 }
1014                 if (valid_lft < preferred_lft) {
1015                         fprintf(stderr, "preferred_lft is greater than valid_lft\n");
1016                         return -1;
1017                 }
1018
1019                 memset(&cinfo, 0, sizeof(cinfo));
1020                 cinfo.ifa_prefered = preferred_lft;
1021                 cinfo.ifa_valid = valid_lft;
1022                 addattr_l(&req.n, sizeof(req), IFA_CACHEINFO, &cinfo,
1023                           sizeof(cinfo));
1024         }
1025
1026         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
1027                 exit(2);
1028
1029         return 0;
1030 }
1031
1032 int do_ipaddr(int argc, char **argv)
1033 {
1034         if (argc < 1)
1035                 return ipaddr_list_or_flush(0, NULL, 0);
1036         if (matches(*argv, "add") == 0)
1037                 return ipaddr_modify(RTM_NEWADDR, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1);
1038         if (matches(*argv, "change") == 0 ||
1039                 strcmp(*argv, "chg") == 0)
1040                 return ipaddr_modify(RTM_NEWADDR, NLM_F_REPLACE, argc-1, argv+1);
1041         if (matches(*argv, "replace") == 0)
1042                 return ipaddr_modify(RTM_NEWADDR, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1);
1043         if (matches(*argv, "delete") == 0)
1044                 return ipaddr_modify(RTM_DELADDR, 0, argc-1, argv+1);
1045         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1046             || matches(*argv, "lst") == 0)
1047                 return ipaddr_list_or_flush(argc-1, argv+1, 0);
1048         if (matches(*argv, "flush") == 0)
1049                 return ipaddr_list_or_flush(argc-1, argv+1, 1);
1050         if (matches(*argv, "help") == 0)
1051                 usage();
1052         fprintf(stderr, "Command \"%s\" is unknown, try \"ip addr help\".\n", *argv);
1053         exit(-1);
1054 }
1055