ip/iproute.c

   1 /*
   2  * iproute.c            "ip route".
   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  *
  12  * Changes:
  13  *
  14  * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
  15  * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized
  16  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <syslog.h>
  22 #include <fcntl.h>
  23 #include <string.h>
  24 #include <time.h>
  25 #include <sys/time.h>
  26 #include <sys/socket.h>
  27 #include <netinet/in.h>
  28 #include <netinet/ip.h>
  29 #include <arpa/inet.h>
  30 #include <linux/in_route.h>
  31
  32 #include "rt_names.h"
  33 #include "utils.h"
  34 #include "ip_common.h"
  35
  36 #ifndef RTAX_RTTVAR
  37 #define RTAX_RTTVAR RTAX_HOPS
  38 #endif
  39
  40
  41 static void usage(void) __attribute__((noreturn));
  42
  43 static void usage(void)
  44 {
  45         fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
  46         fprintf(stderr, "       ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
  47         fprintf(stderr, "                            [ oif STRING ]  [ tos TOS ]\n");
  48         fprintf(stderr, "       ip route { add | del | change | append | replace | monitor } ROUTE\n");
  49         fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
  50         fprintf(stderr, "            [ table TABLE_ID ] [ proto RTPROTO ]\n");
  51         fprintf(stderr, "            [ type TYPE ] [ scope SCOPE ]\n");
  52         fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
  53         fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
  54         fprintf(stderr, "             [ table TABLE_ID ] [ proto RTPROTO ]\n");
  55         fprintf(stderr, "             [ scope SCOPE ] [ metric METRIC ]\n");
  56         fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
  57         fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
  58         fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n");
  59         fprintf(stderr, "           [ rtt NUMBER ] [ rttvar NUMBER ]\n");
  60         fprintf(stderr, "           [ window NUMBER] [ cwnd NUMBER ] [ ssthresh REALM ]\n");
  61         fprintf(stderr, "           [ realms REALM ]\n");
  62         fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n");
  63         fprintf(stderr, "          unreachable | prohibit | blackhole | nat ]\n");
  64         fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
  65         fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
  66         fprintf(stderr, "FLAGS := [ equalize ]\n");
  67         fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
  68         fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
  69         exit(-1);
  70 }
  71
  72
  73 static struct
  74 {
  75         int tb;
  76         int flushed;
  77         char *flushb;
  78         int flushp;
  79         int flushe;
  80         struct rtnl_handle *rth;
  81         int protocol, protocolmask;
  82         int scope, scopemask;
  83         int type, typemask;
  84         int tos, tosmask;
  85         int iif, iifmask;
  86         int oif, oifmask;
  87         int realm, realmmask;
  88         inet_prefix rprefsrc;
  89         inet_prefix rvia;
  90         inet_prefix rdst;
  91         inet_prefix mdst;
  92         inet_prefix rsrc;
  93         inet_prefix msrc;
  94 } filter;
  95
  96 static int flush_update(void)
  97 {
  98         if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
  99                 perror("Failed to send flush request\n");
 100                 return -1;
 101         }
 102         filter.flushp = 0;
 103         return 0;
 104 }
 105
 106 int print_route(const struct sockaddr_nl *who, const struct nlmsghdr *n, void *arg)
 107 {
 108         FILE *fp = (FILE*)arg;
 109         struct rtmsg *r = NLMSG_DATA(n);
 110         int len = n->nlmsg_len;
 111         struct rtattr * tb[RTA_MAX+1];
 112         char abuf[256];
 113         inet_prefix dst;
 114         inet_prefix src;
 115         inet_prefix prefsrc;
 116         inet_prefix via;
 117         int host_len = -1;
 118         SPRINT_BUF(b1);
 119
 120
 121         if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
 122                 fprintf(stderr, "Not a route: %08x %08x %08x\n",
 123                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 124                 return 0;
 125         }
 126         if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
 127                 return 0;
 128         len -= NLMSG_LENGTH(sizeof(*r));
 129         if (len < 0) {
 130                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 131                 return -1;
 132         }
 133
 134         if (r->rtm_family == AF_INET6)
 135                 host_len = 128;
 136         else if (r->rtm_family == AF_INET)
 137                 host_len = 32;
 138         else if (r->rtm_family == AF_DECnet)
 139                 host_len = 16;
 140         else if (r->rtm_family == AF_IPX)
 141                 host_len = 80;
 142
 143         if (r->rtm_family == AF_INET6) {
 144                 if (filter.tb) {
 145                         if (filter.tb < 0) {
 146                                 if (!(r->rtm_flags&RTM_F_CLONED))
 147                                         return 0;
 148                         } else {
 149                                 if (r->rtm_flags&RTM_F_CLONED)
 150                                         return 0;
 151                                 if (filter.tb == RT_TABLE_LOCAL) {
 152                                         if (r->rtm_type != RTN_LOCAL)
 153                                                 return 0;
 154                                 } else if (filter.tb == RT_TABLE_MAIN) {
 155                                         if (r->rtm_type == RTN_LOCAL)
 156                                                 return 0;
 157                                 } else {
 158                                         return 0;
 159                                 }
 160                         }
 161                 }
 162         } else {
 163                 if (filter.tb > 0 && filter.tb != r->rtm_table)
 164                         return 0;
 165         }
 166         if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
 167                 return 0;
 168         if ((filter.scope^r->rtm_scope)&filter.scopemask)
 169                 return 0;
 170         if ((filter.type^r->rtm_type)&filter.typemask)
 171                 return 0;
 172         if ((filter.tos^r->rtm_tos)&filter.tosmask)
 173                 return 0;
 174         if (filter.rdst.family &&
 175             (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
 176                 return 0;
 177         if (filter.mdst.family &&
 178             (r->rtm_family != filter.mdst.family ||
 179              (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
 180                 return 0;
 181         if (filter.rsrc.family &&
 182             (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
 183                 return 0;
 184         if (filter.msrc.family &&
 185             (r->rtm_family != filter.msrc.family ||
 186              (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
 187                 return 0;
 188         if (filter.rvia.family && r->rtm_family != filter.rvia.family)
 189                 return 0;
 190         if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
 191                 return 0;
 192
 193
 194         memset(tb, 0, sizeof(tb));
 195         parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
 196
 197         memset(&dst, 0, sizeof(dst));
 198         dst.family = r->rtm_family;
 199         if (tb[RTA_DST])
 200                 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
 201         if (filter.rsrc.family || filter.msrc.family) {
 202                 memset(&src, 0, sizeof(src));
 203                 src.family = r->rtm_family;
 204                 if (tb[RTA_SRC])
 205                         memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
 206         }
 207         if (filter.rvia.bitlen>0) {
 208                 memset(&via, 0, sizeof(via));
 209                 via.family = r->rtm_family;
 210                 if (tb[RTA_GATEWAY])
 211                         memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len);
 212         }
 213         if (filter.rprefsrc.bitlen>0) {
 214                 memset(&prefsrc, 0, sizeof(prefsrc));
 215                 prefsrc.family = r->rtm_family;
 216                 if (tb[RTA_PREFSRC])
 217                         memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len);
 218         }
 219
 220         if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
 221                 return 0;
 222         if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
 223             inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
 224                 return 0;
 225
 226         if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
 227                 return 0;
 228         if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
 229             inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
 230                 return 0;
 231
 232         if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
 233                 return 0;
 234         if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
 235                 return 0;
 236         if (filter.realmmask) {
 237                 __u32 realms = 0;
 238                 if (tb[RTA_FLOW])
 239                         realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
 240                 if ((realms^filter.realm)&filter.realmmask)
 241                         return 0;
 242         }
 243         if (filter.iifmask) {
 244                 int iif = 0;
 245                 if (tb[RTA_IIF])
 246                         iif = *(int*)RTA_DATA(tb[RTA_IIF]);
 247                 if ((iif^filter.iif)&filter.iifmask)
 248                         return 0;
 249         }
 250         if (filter.oifmask) {
 251                 int oif = 0;
 252                 if (tb[RTA_OIF])
 253                         oif = *(int*)RTA_DATA(tb[RTA_OIF]);
 254                 if ((oif^filter.oif)&filter.oifmask)
 255                         return 0;
 256         }
 257         if (filter.flushb &&
 258             r->rtm_family == AF_INET6 &&
 259             r->rtm_dst_len == 0 &&
 260             r->rtm_type == RTN_UNREACHABLE &&
 261             tb[RTA_PRIORITY] &&
 262             *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
 263                 return 0;
 264
 265         if (filter.flushb) {
 266                 struct nlmsghdr *fn;
 267                 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
 268                         if (flush_update())
 269                                 return -1;
 270                 }
 271                 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
 272                 memcpy(fn, n, n->nlmsg_len);
 273                 fn->nlmsg_type = RTM_DELROUTE;
 274                 fn->nlmsg_flags = NLM_F_REQUEST;
 275                 fn->nlmsg_seq = ++filter.rth->seq;
 276                 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
 277                 filter.flushed++;
 278                 if (show_stats < 2)
 279                         return 0;
 280         }
 281
 282         if (n->nlmsg_type == RTM_DELROUTE)
 283                 fprintf(fp, "Deleted ");
 284         if (r->rtm_type != RTN_UNICAST && !filter.type)
 285                 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
 286
 287         if (tb[RTA_DST]) {
 288                 if (r->rtm_dst_len != host_len) {
 289                         fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
 290                                                          RTA_PAYLOAD(tb[RTA_DST]),
 291                                                          RTA_DATA(tb[RTA_DST]),
 292                                                          abuf, sizeof(abuf)),
 293                                 r->rtm_dst_len
 294                                 );
 295                 } else {
 296                         fprintf(fp, "%s ", format_host(r->rtm_family,
 297                                                        RTA_PAYLOAD(tb[RTA_DST]),
 298                                                        RTA_DATA(tb[RTA_DST]),
 299                                                        abuf, sizeof(abuf))
 300                                 );
 301                 }
 302         } else if (r->rtm_dst_len) {
 303                 fprintf(fp, "0/%d ", r->rtm_dst_len);
 304         } else {
 305                 fprintf(fp, "default ");
 306         }
 307         if (tb[RTA_SRC]) {
 308                 if (r->rtm_src_len != host_len) {
 309                         fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
 310                                                          RTA_PAYLOAD(tb[RTA_SRC]),
 311                                                          RTA_DATA(tb[RTA_SRC]),
 312                                                          abuf, sizeof(abuf)),
 313                                 r->rtm_src_len
 314                                 );
 315                 } else {
 316                         fprintf(fp, "from %s ", format_host(r->rtm_family,
 317                                                        RTA_PAYLOAD(tb[RTA_SRC]),
 318                                                        RTA_DATA(tb[RTA_SRC]),
 319                                                        abuf, sizeof(abuf))
 320                                 );
 321                 }
 322         } else if (r->rtm_src_len) {
 323                 fprintf(fp, "from 0/%u ", r->rtm_src_len);
 324         }
 325         if (r->rtm_tos && filter.tosmask != -1) {
 326                 SPRINT_BUF(b1);
 327                 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
 328         }
 329         if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
 330                 fprintf(fp, "via %s ",
 331                         format_host(r->rtm_family,
 332                                     RTA_PAYLOAD(tb[RTA_GATEWAY]),
 333                                     RTA_DATA(tb[RTA_GATEWAY]),
 334                                     abuf, sizeof(abuf)));
 335         }
 336         if (tb[RTA_OIF] && filter.oifmask != -1)
 337                 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
 338
 339         if (!(r->rtm_flags&RTM_F_CLONED)) {
 340                 if (r->rtm_table != RT_TABLE_MAIN && !filter.tb)
 341                         fprintf(fp, " table %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1)));
 342                 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1)
 343                         fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
 344                 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1)
 345                         fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
 346         }
 347         if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
 348                 /* Do not use format_host(). It is our local addr
 349                    and symbolic name will not be useful.
 350                  */
 351                 fprintf(fp, " src %s ",
 352                         rt_addr_n2a(r->rtm_family,
 353                                     RTA_PAYLOAD(tb[RTA_PREFSRC]),
 354                                     RTA_DATA(tb[RTA_PREFSRC]),
 355                                     abuf, sizeof(abuf)));
 356         }
 357         if (tb[RTA_PRIORITY])
 358                 fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY]));
 359         if (r->rtm_flags & RTNH_F_DEAD)
 360                 fprintf(fp, "dead ");
 361         if (r->rtm_flags & RTNH_F_ONLINK)
 362                 fprintf(fp, "onlink ");
 363         if (r->rtm_flags & RTNH_F_PERVASIVE)
 364                 fprintf(fp, "pervasive ");
 365         if (r->rtm_flags & RTM_F_EQUALIZE)
 366                 fprintf(fp, "equalize ");
 367         if (r->rtm_flags & RTM_F_NOTIFY)
 368                 fprintf(fp, "notify ");
 369
 370         if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
 371                 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
 372                 __u32 from = to>>16;
 373                 to &= 0xFFFF;
 374                 fprintf(fp, "realm%s ", from ? "s" : "");
 375                 if (from) {
 376                         fprintf(fp, "%s/",
 377                                 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
 378                 }
 379                 fprintf(fp, "%s ",
 380                         rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
 381         }
 382         if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
 383                 __u32 flags = r->rtm_flags&~0xFFFF;
 384                 int first = 1;
 385
 386                 fprintf(fp, "%s    cache ", _SL_);
 387
 388 #define PRTFL(fl,flname) if (flags&RTCF_##fl) { \
 389   flags &= ~RTCF_##fl; \
 390   fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
 391   first = 0; }
 392                 PRTFL(LOCAL, "local");
 393                 PRTFL(REJECT, "reject");
 394                 PRTFL(MULTICAST, "mc");
 395                 PRTFL(BROADCAST, "brd");
 396                 PRTFL(DNAT, "dst-nat");
 397                 PRTFL(SNAT, "src-nat");
 398                 PRTFL(MASQ, "masq");
 399                 PRTFL(DIRECTDST, "dst-direct");
 400                 PRTFL(DIRECTSRC, "src-direct");
 401                 PRTFL(REDIRECTED, "redirected");
 402                 PRTFL(DOREDIRECT, "redirect");
 403                 PRTFL(FAST, "fastroute");
 404                 PRTFL(NOTIFY, "notify");
 405                 PRTFL(TPROXY, "proxy");
 406 #ifdef RTCF_EQUALIZE
 407                 PRTFL(EQUALIZE, "equalize");
 408 #endif
 409                 if (flags)
 410                         fprintf(fp, "%s%x> ", first ? "<" : "", flags);
 411                 if (tb[RTA_CACHEINFO]) {
 412                         struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
 413                         static int hz;
 414                         if (!hz)
 415                                 hz = get_hz();
 416                         if (ci->rta_expires != 0)
 417                                 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
 418                         if (ci->rta_error != 0)
 419                                 fprintf(fp, " error %d", ci->rta_error);
 420                         if (show_stats) {
 421                                 if (ci->rta_clntref)
 422                                         fprintf(fp, " users %d", ci->rta_clntref);
 423                                 if (ci->rta_used != 0)
 424                                         fprintf(fp, " used %d", ci->rta_used);
 425                                 if (ci->rta_lastuse != 0)
 426                                         fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
 427                         }
 428 #ifdef RTNETLINK_HAVE_PEERINFO
 429                         if (ci->rta_id)
 430                                 fprintf(fp, " ipid 0x%04x", ci->rta_id);
 431                         if (ci->rta_ts || ci->rta_tsage)
 432                                 fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage);
 433 #endif
 434                 }
 435         } else if (r->rtm_family == AF_INET6) {
 436                 struct rta_cacheinfo *ci = NULL;
 437                 if (tb[RTA_CACHEINFO])
 438                         ci = RTA_DATA(tb[RTA_CACHEINFO]);
 439                 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
 440                         static int hz;
 441                         if (!hz)
 442                                 hz = get_hz();
 443                         if (r->rtm_flags & RTM_F_CLONED)
 444                                 fprintf(fp, "%s    cache ", _SL_);
 445                         if (ci->rta_expires)
 446                                 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
 447                         if (ci->rta_error != 0)
 448                                 fprintf(fp, " error %d", ci->rta_error);
 449                         if (show_stats) {
 450                                 if (ci->rta_clntref)
 451                                         fprintf(fp, " users %d", ci->rta_clntref);
 452                                 if (ci->rta_used != 0)
 453                                         fprintf(fp, " used %d", ci->rta_used);
 454                                 if (ci->rta_lastuse != 0)
 455                                         fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
 456                         }
 457                 } else if (ci) {
 458                         if (ci->rta_error != 0)
 459                                 fprintf(fp, " error %d", ci->rta_error);
 460                 }
 461         }
 462         if (tb[RTA_METRICS]) {
 463                 int i;
 464                 unsigned mxlock = 0;
 465                 struct rtattr *mxrta[RTAX_MAX+1];
 466
 467                 memset(mxrta, 0, sizeof(mxrta));
 468
 469                 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
 470                             RTA_PAYLOAD(tb[RTA_METRICS]));
 471                 if (mxrta[RTAX_LOCK])
 472                         mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]);
 473
 474                 for (i=2; i<=RTAX_MAX; i++) {
 475                         static char *mx_names[] =
 476                         {
 477                                 "mtu",
 478                                 "window",
 479                                 "rtt",
 480                                 "rttvar",
 481                                 "ssthresh",
 482                                 "cwnd",
 483                                 "advmss",
 484                                 "reordering",
 485                         };
 486                         static int hz;
 487                         if (mxrta[i] == NULL)
 488                                 continue;
 489                         if (!hz)
 490                                 hz = get_hz();
 491                         if (i-2 < sizeof(mx_names)/sizeof(char*))
 492                                 fprintf(fp, " %s", mx_names[i-2]);
 493                         else
 494                                 fprintf(fp, " metric%d", i);
 495                         if (mxlock & (1<<i))
 496                                 fprintf(fp, " lock");
 497
 498                         if (i != RTAX_RTT && i != RTAX_RTTVAR)
 499                                 fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i]));
 500                         else {
 501                                 unsigned val = *(unsigned*)RTA_DATA(mxrta[i]);
 502
 503                                 val *= 1000;
 504                                 if (i == RTAX_RTT)
 505                                         val /= 8;
 506                                 else
 507                                         val /= 4;
 508                                 if (val >= hz)
 509                                         fprintf(fp, " %ums", val/hz);
 510                                 else
 511                                         fprintf(fp, " %.2fms", (float)val/hz);
 512                         }
 513                 }
 514         }
 515         if (tb[RTA_IIF] && filter.iifmask != -1) {
 516                 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
 517         }
 518         if (tb[RTA_MULTIPATH]) {
 519                 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
 520                 int first = 0;
 521
 522                 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
 523
 524                 for (;;) {
 525                         if (len < sizeof(*nh))
 526                                 break;
 527                         if (nh->rtnh_len > len)
 528                                 break;
 529                         if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
 530                                 if (first)
 531                                         fprintf(fp, " Oifs:");
 532                                 else
 533                                         fprintf(fp, " ");
 534                         } else
 535                                 fprintf(fp, "%s\tnexthop", _SL_);
 536                         if (nh->rtnh_len > sizeof(*nh)) {
 537                                 memset(tb, 0, sizeof(tb));
 538                                 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
 539                                 if (tb[RTA_GATEWAY]) {
 540                                         fprintf(fp, " via %s ",
 541                                                 format_host(r->rtm_family,
 542                                                             RTA_PAYLOAD(tb[RTA_GATEWAY]),
 543                                                             RTA_DATA(tb[RTA_GATEWAY]),
 544                                                             abuf, sizeof(abuf)));
 545                                 }
 546                         }
 547                         if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
 548                                 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex));
 549                                 if (nh->rtnh_hops != 1)
 550                                         fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
 551                         } else {
 552                                 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
 553                                 fprintf(fp, " weight %d", nh->rtnh_hops+1);
 554                         }
 555                         if (nh->rtnh_flags & RTNH_F_DEAD)
 556                                 fprintf(fp, " dead");
 557                         if (nh->rtnh_flags & RTNH_F_ONLINK)
 558                                 fprintf(fp, " onlink");
 559                         if (nh->rtnh_flags & RTNH_F_PERVASIVE)
 560                                 fprintf(fp, " pervasive");
 561                         len -= NLMSG_ALIGN(nh->rtnh_len);
 562                         nh = RTNH_NEXT(nh);
 563                 }
 564         }
 565         fprintf(fp, "\n");
 566         fflush(fp);
 567         return 0;
 568 }
 569
 570
 571 int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp)
 572 {
 573         int argc = *argcp;
 574         char **argv = *argvp;
 575
 576         while (++argv, --argc > 0) {
 577                 if (strcmp(*argv, "via") == 0) {
 578                         NEXT_ARG();
 579                         rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv));
 580                         rtnh->rtnh_len += sizeof(struct rtattr) + 4;
 581                 } else if (strcmp(*argv, "dev") == 0) {
 582                         NEXT_ARG();
 583                         if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
 584                                 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
 585                                 exit(1);
 586                         }
 587                 } else if (strcmp(*argv, "weight") == 0) {
 588                         unsigned w;
 589                         NEXT_ARG();
 590                         if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
 591                                 invarg("\"weight\" is invalid\n", *argv);
 592                         rtnh->rtnh_hops = w - 1;
 593                 } else if (strcmp(*argv, "onlink") == 0) {
 594                         rtnh->rtnh_flags |= RTNH_F_ONLINK;
 595                 } else
 596                         break;
 597         }
 598         *argcp = argc;
 599         *argvp = argv;
 600         return 0;
 601 }
 602
 603 int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
 604 {
 605         char buf[1024];
 606         struct rtattr *rta = (void*)buf;
 607         struct rtnexthop *rtnh;
 608
 609         rta->rta_type = RTA_MULTIPATH;
 610         rta->rta_len = RTA_LENGTH(0);
 611         rtnh = RTA_DATA(rta);
 612
 613         while (argc > 0) {
 614                 if (strcmp(*argv, "nexthop") != 0) {
 615                         fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
 616                         exit(-1);
 617                 }
 618                 if (argc <= 1) {
 619                         fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
 620                         exit(-1);
 621                 }
 622                 memset(rtnh, 0, sizeof(*rtnh));
 623                 rtnh->rtnh_len = sizeof(*rtnh);
 624                 rta->rta_len += rtnh->rtnh_len;
 625                 parse_one_nh(rta, rtnh, &argc, &argv);
 626                 rtnh = RTNH_NEXT(rtnh);
 627         }
 628
 629         if (rta->rta_len > RTA_LENGTH(0))
 630                 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
 631         return 0;
 632 }
 633
 634
 635 int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
 636 {
 637         struct rtnl_handle rth;
 638         struct {
 639                 struct nlmsghdr         n;
 640                 struct rtmsg            r;
 641                 char                    buf[1024];
 642         } req;
 643         char  mxbuf[256];
 644         struct rtattr * mxrta = (void*)mxbuf;
 645         unsigned mxlock = 0;
 646         char  *d = NULL;
 647         int gw_ok = 0;
 648         int dst_ok = 0;
 649         int nhs_ok = 0;
 650         int scope_ok = 0;
 651         int table_ok = 0;
 652         int proto_ok = 0;
 653         int type_ok = 0;
 654
 655         memset(&req, 0, sizeof(req));
 656
 657         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
 658         req.n.nlmsg_flags = NLM_F_REQUEST|flags;
 659         req.n.nlmsg_type = cmd;
 660         req.r.rtm_family = preferred_family;
 661         req.r.rtm_table = RT_TABLE_MAIN;
 662         req.r.rtm_scope = RT_SCOPE_NOWHERE;
 663
 664         if (cmd != RTM_DELROUTE) {
 665                 req.r.rtm_protocol = RTPROT_BOOT;
 666                 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
 667                 req.r.rtm_type = RTN_UNICAST;
 668         }
 669
 670         mxrta->rta_type = RTA_METRICS;
 671         mxrta->rta_len = RTA_LENGTH(0);
 672
 673         while (argc > 0) {
 674                 if (strcmp(*argv, "src") == 0) {
 675                         inet_prefix addr;
 676                         NEXT_ARG();
 677                         get_addr(&addr, *argv, req.r.rtm_family);
 678                         if (req.r.rtm_family == AF_UNSPEC)
 679                                 req.r.rtm_family = addr.family;
 680                         addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
 681                 } else if (strcmp(*argv, "via") == 0) {
 682                         inet_prefix addr;
 683                         gw_ok = 1;
 684                         NEXT_ARG();
 685                         get_addr(&addr, *argv, req.r.rtm_family);
 686                         if (req.r.rtm_family == AF_UNSPEC)
 687                                 req.r.rtm_family = addr.family;
 688                         addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
 689                 } else if (strcmp(*argv, "from") == 0) {
 690                         inet_prefix addr;
 691                         NEXT_ARG();
 692                         get_prefix(&addr, *argv, req.r.rtm_family);
 693                         if (req.r.rtm_family == AF_UNSPEC)
 694                                 req.r.rtm_family = addr.family;
 695                         if (addr.bytelen)
 696                                 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
 697                         req.r.rtm_src_len = addr.bitlen;
 698                 } else if (strcmp(*argv, "tos") == 0 ||
 699                            matches(*argv, "dsfield") == 0) {
 700                         __u32 tos;
 701                         NEXT_ARG();
 702                         if (rtnl_dsfield_a2n(&tos, *argv))
 703                                 invarg("\"tos\" value is invalid\n", *argv);
 704                         req.r.rtm_tos = tos;
 705                 } else if (matches(*argv, "metric") == 0 ||
 706                            matches(*argv, "priority") == 0 ||
 707                            matches(*argv, "preference") == 0) {
 708                         __u32 metric;
 709                         NEXT_ARG();
 710                         if (get_u32(&metric, *argv, 0))
 711                                 invarg("\"metric\" value is invalid\n", *argv);
 712                         addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
 713                 } else if (strcmp(*argv, "scope") == 0) {
 714                         int scope = 0;
 715                         NEXT_ARG();
 716                         if (rtnl_rtscope_a2n(&scope, *argv))
 717                                 invarg("invalid \"scope\" value\n", *argv);
 718                         req.r.rtm_scope = scope;
 719                         scope_ok = 1;
 720                 } else if (strcmp(*argv, "mtu") == 0) {
 721                         unsigned mtu;
 722                         NEXT_ARG();
 723                         if (strcmp(*argv, "lock") == 0) {
 724                                 mxlock |= (1<<RTAX_MTU);
 725                                 NEXT_ARG();
 726                         }
 727                         if (get_unsigned(&mtu, *argv, 0))
 728                                 invarg("\"mtu\" value is invalid\n", *argv);
 729                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
 730 #ifdef RTAX_ADVMSS
 731                 } else if (strcmp(*argv, "advmss") == 0) {
 732                         unsigned mss;
 733                         NEXT_ARG();
 734                         if (strcmp(*argv, "lock") == 0) {
 735                                 mxlock |= (1<<RTAX_ADVMSS);
 736                                 NEXT_ARG();
 737                         }
 738                         if (get_unsigned(&mss, *argv, 0))
 739                                 invarg("\"mss\" value is invalid\n", *argv);
 740                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
 741 #endif
 742 #ifdef RTAX_REORDERING
 743                 } else if (matches(*argv, "reordering") == 0) {
 744                         unsigned reord;
 745                         NEXT_ARG();
 746                         if (strcmp(*argv, "lock") == 0) {
 747                                 mxlock |= (1<<RTAX_REORDERING);
 748                                 NEXT_ARG();
 749                         }
 750                         if (get_unsigned(&reord, *argv, 0))
 751                                 invarg("\"reordering\" value is invalid\n", *argv);
 752                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
 753 #endif
 754                 } else if (strcmp(*argv, "rtt") == 0) {
 755                         unsigned rtt;
 756                         NEXT_ARG();
 757                         if (strcmp(*argv, "lock") == 0) {
 758                                 mxlock |= (1<<RTAX_RTT);
 759                                 NEXT_ARG();
 760                         }
 761                         if (get_unsigned(&rtt, *argv, 0))
 762                                 invarg("\"rtt\" value is invalid\n", *argv);
 763                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, rtt);
 764                 } else if (matches(*argv, "window") == 0) {
 765                         unsigned win;
 766                         NEXT_ARG();
 767                         if (strcmp(*argv, "lock") == 0) {
 768                                 mxlock |= (1<<RTAX_WINDOW);
 769                                 NEXT_ARG();
 770                         }
 771                         if (get_unsigned(&win, *argv, 0))
 772                                 invarg("\"window\" value is invalid\n", *argv);
 773                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
 774                 } else if (matches(*argv, "cwnd") == 0) {
 775                         unsigned win;
 776                         NEXT_ARG();
 777                         if (strcmp(*argv, "lock") == 0) {
 778                                 mxlock |= (1<<RTAX_CWND);
 779                                 NEXT_ARG();
 780                         }
 781                         if (get_unsigned(&win, *argv, 0))
 782                                 invarg("\"cwnd\" value is invalid\n", *argv);
 783                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
 784                 } else if (matches(*argv, "rttvar") == 0) {
 785                         unsigned win;
 786                         NEXT_ARG();
 787                         if (strcmp(*argv, "lock") == 0) {
 788                                 mxlock |= (1<<RTAX_RTTVAR);
 789                                 NEXT_ARG();
 790                         }
 791                         if (get_unsigned(&win, *argv, 0))
 792                                 invarg("\"rttvar\" value is invalid\n", *argv);
 793                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, win);
 794                 } else if (matches(*argv, "ssthresh") == 0) {
 795                         unsigned win;
 796                         NEXT_ARG();
 797                         if (strcmp(*argv, "lock") == 0) {
 798                                 mxlock |= (1<<RTAX_SSTHRESH);
 799                                 NEXT_ARG();
 800                         }
 801                         if (get_unsigned(&win, *argv, 0))
 802                                 invarg("\"ssthresh\" value is invalid\n", *argv);
 803                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
 804                 } else if (matches(*argv, "realms") == 0) {
 805                         __u32 realm;
 806                         NEXT_ARG();
 807                         if (get_rt_realms(&realm, *argv))
 808                                 invarg("\"realm\" value is invalid\n", *argv);
 809                         addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
 810                 } else if (strcmp(*argv, "onlink") == 0) {
 811                         req.r.rtm_flags |= RTNH_F_ONLINK;
 812                 } else if (matches(*argv, "equalize") == 0 ||
 813                            strcmp(*argv, "eql") == 0) {
 814                         req.r.rtm_flags |= RTM_F_EQUALIZE;
 815                 } else if (strcmp(*argv, "nexthop") == 0) {
 816                         nhs_ok = 1;
 817                         break;
 818                 } else if (matches(*argv, "protocol") == 0) {
 819                         int prot;
 820                         NEXT_ARG();
 821                         if (rtnl_rtprot_a2n(&prot, *argv))
 822                                 invarg("\"protocol\" value is invalid\n", *argv);
 823                         req.r.rtm_protocol = prot;
 824                         proto_ok =1;
 825                 } else if (matches(*argv, "table") == 0) {
 826                         int tid;
 827                         NEXT_ARG();
 828                         if (rtnl_rttable_a2n(&tid, *argv))
 829                                 invarg("\"table\" value is invalid\n", *argv);
 830                         req.r.rtm_table = tid;
 831                         table_ok = 1;
 832                 } else if (strcmp(*argv, "dev") == 0 ||
 833                            strcmp(*argv, "oif") == 0) {
 834                         NEXT_ARG();
 835                         d = *argv;
 836                 } else {
 837                         int type;
 838                         inet_prefix dst;
 839
 840                         if (strcmp(*argv, "to") == 0) {
 841                                 NEXT_ARG();
 842                         }
 843                         if ((**argv < '0' || **argv > '9') &&
 844                             rtnl_rtntype_a2n(&type, *argv) == 0) {
 845                                 NEXT_ARG();
 846                                 req.r.rtm_type = type;
 847                                 type_ok = 1;
 848                         }
 849
 850                         if (matches(*argv, "help") == 0)
 851                                 usage();
 852                         if (dst_ok)
 853                                 duparg2("to", *argv);
 854                         get_prefix(&dst, *argv, req.r.rtm_family);
 855                         if (req.r.rtm_family == AF_UNSPEC)
 856                                 req.r.rtm_family = dst.family;
 857                         req.r.rtm_dst_len = dst.bitlen;
 858                         dst_ok = 1;
 859                         if (dst.bytelen)
 860                                 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
 861                 }
 862                 argc--; argv++;
 863         }
 864
 865         if (rtnl_open(&rth, 0) < 0)
 866                 exit(1);
 867
 868         if (d || nhs_ok)  {
 869                 int idx;
 870
 871                 ll_init_map(&rth);
 872
 873                 if (d) {
 874                         if ((idx = ll_name_to_index(d)) == 0) {
 875                                 fprintf(stderr, "Cannot find device \"%s\"\n", d);
 876                                 return -1;
 877                         }
 878                         addattr32(&req.n, sizeof(req), RTA_OIF, idx);
 879                 }
 880         }
 881
 882         if (mxrta->rta_len > RTA_LENGTH(0)) {
 883                 if (mxlock)
 884                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
 885                 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
 886         }
 887
 888         if (nhs_ok)
 889                 parse_nexthops(&req.n, &req.r, argc, argv);
 890
 891         if (!table_ok) {
 892                 if (req.r.rtm_type == RTN_LOCAL ||
 893                     req.r.rtm_type == RTN_BROADCAST ||
 894                     req.r.rtm_type == RTN_NAT ||
 895                     req.r.rtm_type == RTN_ANYCAST)
 896                         req.r.rtm_table = RT_TABLE_LOCAL;
 897         }
 898         if (!scope_ok) {
 899                 if (req.r.rtm_type == RTN_LOCAL ||
 900                     req.r.rtm_type == RTN_NAT)
 901                         req.r.rtm_scope = RT_SCOPE_HOST;
 902                 else if (req.r.rtm_type == RTN_BROADCAST ||
 903                          req.r.rtm_type == RTN_MULTICAST ||
 904                          req.r.rtm_type == RTN_ANYCAST)
 905                         req.r.rtm_scope = RT_SCOPE_LINK;
 906                 else if (req.r.rtm_type == RTN_UNICAST ||
 907                          req.r.rtm_type == RTN_UNSPEC) {
 908                         if (cmd == RTM_DELROUTE)
 909                                 req.r.rtm_scope = RT_SCOPE_NOWHERE;
 910                         else if (!gw_ok && !nhs_ok)
 911                                 req.r.rtm_scope = RT_SCOPE_LINK;
 912                 }
 913         }
 914
 915         if (req.r.rtm_family == AF_UNSPEC)
 916                 req.r.rtm_family = AF_INET;
 917
 918         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 919                 exit(2);
 920
 921         return 0;
 922 }
 923
 924 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
 925 {
 926         struct {
 927                 struct nlmsghdr nlh;
 928                 struct rtmsg rtm;
 929         } req;
 930         struct sockaddr_nl nladdr;
 931
 932         memset(&nladdr, 0, sizeof(nladdr));
 933         memset(&req, 0, sizeof(req));
 934         nladdr.nl_family = AF_NETLINK;
 935
 936         req.nlh.nlmsg_len = sizeof(req);
 937         req.nlh.nlmsg_type = RTM_GETROUTE;
 938         req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
 939         req.nlh.nlmsg_pid = 0;
 940         req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
 941         req.rtm.rtm_family = family;
 942         req.rtm.rtm_flags |= RTM_F_CLONED;
 943
 944         return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
 945 }
 946
 947 static int iproute_flush_cache(void)
 948 {
 949 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
 950
 951         int len;
 952         int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
 953         char *buffer = "-1";
 954
 955         if (flush_fd < 0) {
 956                 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
 957                 return -1;
 958         }
 959
 960         len = strlen (buffer);
 961
 962         if ((write (flush_fd, (void *)buffer, len)) < len) {
 963                 fprintf (stderr, "Cannot flush routing cache\n");
 964                 return -1;
 965         }
 966         close(flush_fd);
 967         return 0;
 968 }
 969
 970
 971 static int iproute_list_or_flush(int argc, char **argv, int flush)
 972 {
 973         int do_ipv6 = preferred_family;
 974         struct rtnl_handle rth;
 975         char *id = NULL;
 976         char *od = NULL;
 977
 978         iproute_reset_filter();
 979         filter.tb = RT_TABLE_MAIN;
 980
 981         if (flush && argc <= 0) {
 982                 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
 983                 return -1;
 984         }
 985
 986         while (argc > 0) {
 987                 if (matches(*argv, "table") == 0) {
 988                         int tid;
 989                         NEXT_ARG();
 990                         if (rtnl_rttable_a2n(&tid, *argv)) {
 991                                 if (strcmp(*argv, "all") == 0) {
 992                                         tid = 0;
 993                                 } else if (strcmp(*argv, "cache") == 0) {
 994                                         tid = -1;
 995                                 } else if (strcmp(*argv, "help") == 0) {
 996                                         usage();
 997                                 } else {
 998                                         invarg("table id value is invalid\n", *argv);
 999                                 }
1000                         }
1001                         filter.tb = tid;
1002                 } else if (matches(*argv, "cached") == 0 ||
1003                            matches(*argv, "cloned") == 0) {
1004                         filter.tb = -1;
1005                 } else if (strcmp(*argv, "tos") == 0 ||
1006                            matches(*argv, "dsfield") == 0) {
1007                         __u32 tos;
1008                         NEXT_ARG();
1009                         if (rtnl_dsfield_a2n(&tos, *argv))
1010                                 invarg("TOS value is invalid\n", *argv);
1011                         filter.tos = tos;
1012                         filter.tosmask = -1;
1013                 } else if (matches(*argv, "protocol") == 0) {
1014                         int prot = 0;
1015                         NEXT_ARG();
1016                         filter.protocolmask = -1;
1017                         if (rtnl_rtprot_a2n(&prot, *argv)) {
1018                                 if (strcmp(*argv, "all") != 0)
1019                                         invarg("invalid \"protocol\"\n", *argv);
1020                                 prot = 0;
1021                                 filter.protocolmask = 0;
1022                         }
1023                         filter.protocol = prot;
1024                 } else if (matches(*argv, "scope") == 0) {
1025                         int scope = 0;
1026                         NEXT_ARG();
1027                         filter.scopemask = -1;
1028                         if (rtnl_rtscope_a2n(&scope, *argv)) {
1029                                 if (strcmp(*argv, "all") != 0)
1030                                         invarg("invalid \"scope\"\n", *argv);
1031                                 scope = RT_SCOPE_NOWHERE;
1032                                 filter.scopemask = 0;
1033                         }
1034                         filter.scope = scope;
1035                 } else if (matches(*argv, "type") == 0) {
1036                         int type;
1037                         NEXT_ARG();
1038                         filter.typemask = -1;
1039                         if (rtnl_rtntype_a2n(&type, *argv))
1040                                 invarg("node type value is invalid\n", *argv);
1041                         filter.type = type;
1042                 } else if (strcmp(*argv, "dev") == 0 ||
1043                            strcmp(*argv, "oif") == 0) {
1044                         NEXT_ARG();
1045                         od = *argv;
1046                 } else if (strcmp(*argv, "iif") == 0) {
1047                         NEXT_ARG();
1048                         id = *argv;
1049                 } else if (strcmp(*argv, "via") == 0) {
1050                         NEXT_ARG();
1051                         get_prefix(&filter.rvia, *argv, do_ipv6);
1052                 } else if (strcmp(*argv, "src") == 0) {
1053                         NEXT_ARG();
1054                         get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1055                 } else if (matches(*argv, "realms") == 0) {
1056                         __u32 realm;
1057                         NEXT_ARG();
1058                         if (get_rt_realms(&realm, *argv))
1059                                 invarg("invalid realms\n", *argv);
1060                         filter.realm = realm;
1061                         filter.realmmask = ~0U;
1062                         if ((filter.realm&0xFFFF) == 0 &&
1063                             (*argv)[strlen(*argv) - 1] == '/')
1064                                 filter.realmmask &= ~0xFFFF;
1065                         if ((filter.realm&0xFFFF0000U) == 0 &&
1066                             (strchr(*argv, '/') == NULL ||
1067                              (*argv)[0] == '/'))
1068                                 filter.realmmask &= ~0xFFFF0000U;
1069                 } else if (matches(*argv, "from") == 0) {
1070                         NEXT_ARG();
1071                         if (matches(*argv, "root") == 0) {
1072                                 NEXT_ARG();
1073                                 get_prefix(&filter.rsrc, *argv, do_ipv6);
1074                         } else if (matches(*argv, "match") == 0) {
1075                                 NEXT_ARG();
1076                                 get_prefix(&filter.msrc, *argv, do_ipv6);
1077                         } else {
1078                                 if (matches(*argv, "exact") == 0) {
1079                                         NEXT_ARG();
1080                                 }
1081                                 get_prefix(&filter.msrc, *argv, do_ipv6);
1082                                 filter.rsrc = filter.msrc;
1083                         }
1084                 } else {
1085                         if (matches(*argv, "to") == 0) {
1086                                 NEXT_ARG();
1087                         }
1088                         if (matches(*argv, "root") == 0) {
1089                                 NEXT_ARG();
1090                                 get_prefix(&filter.rdst, *argv, do_ipv6);
1091                         } else if (matches(*argv, "match") == 0) {
1092                                 NEXT_ARG();
1093                                 get_prefix(&filter.mdst, *argv, do_ipv6);
1094                         } else {
1095                                 if (matches(*argv, "exact") == 0) {
1096                                         NEXT_ARG();
1097                                 }
1098                                 get_prefix(&filter.mdst, *argv, do_ipv6);
1099                                 filter.rdst = filter.mdst;
1100                         }
1101                 }
1102                 argc--; argv++;
1103         }
1104
1105         if (do_ipv6 == AF_UNSPEC && filter.tb)
1106                 do_ipv6 = AF_INET;
1107
1108         if (rtnl_open(&rth, 0) < 0)
1109                 exit(1);
1110
1111         ll_init_map(&rth);
1112
1113         if (id || od)  {
1114                 int idx;
1115
1116                 if (id) {
1117                         if ((idx = ll_name_to_index(id)) == 0) {
1118                                 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1119                                 return -1;
1120                         }
1121                         filter.iif = idx;
1122                         filter.iifmask = -1;
1123                 }
1124                 if (od) {
1125                         if ((idx = ll_name_to_index(od)) == 0) {
1126                                 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1127                                 return -1;
1128                         }
1129                         filter.oif = idx;
1130                         filter.oifmask = -1;
1131                 }
1132         }
1133
1134         if (flush) {
1135                 int round = 0;
1136                 char flushb[4096-512];
1137                 time_t start = time(0);
1138
1139                 if (filter.tb == -1) {
1140                         if (do_ipv6 != AF_INET6) {
1141                                 iproute_flush_cache();
1142                                 if (show_stats)
1143                                         printf("*** IPv4 routing cache is flushed.\n");
1144                         }
1145                         if (do_ipv6 == AF_INET)
1146                                 return 0;
1147                 }
1148
1149                 filter.flushb = flushb;
1150                 filter.flushp = 0;
1151                 filter.flushe = sizeof(flushb);
1152                 filter.rth = &rth;
1153
1154                 for (;;) {
1155                         if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1156                                 perror("Cannot send dump request");
1157                                 exit(1);
1158                         }
1159                         filter.flushed = 0;
1160                         if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1161                                 fprintf(stderr, "Flush terminated\n");
1162                                 exit(1);
1163                         }
1164                         if (filter.flushed == 0) {
1165                                 if (round == 0) {
1166                                         if (filter.tb != -1 || do_ipv6 == AF_INET6)
1167                                                 fprintf(stderr, "Nothing to flush.\n");
1168                                 } else if (show_stats)
1169                                         printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
1170                                 fflush(stdout);
1171                                 return 0;
1172                         }
1173                         round++;
1174                         if (flush_update() < 0)
1175                                 exit(1);
1176
1177                         if (time(0) - start > 30) {
1178                                 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1179                                        time(0) - start, filter.flushed);
1180                                 exit(1);
1181                         }
1182
1183                         if (show_stats) {
1184                                 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1185                                 fflush(stdout);
1186                         }
1187                 }
1188         }
1189
1190         if (filter.tb != -1) {
1191                 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1192                         perror("Cannot send dump request");
1193                         exit(1);
1194                 }
1195         } else {
1196                 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1197                         perror("Cannot send dump request");
1198                         exit(1);
1199                 }
1200         }
1201
1202         if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1203                 fprintf(stderr, "Dump terminated\n");
1204                 exit(1);
1205         }
1206
1207         exit(0);
1208 }
1209
1210
1211 int iproute_get(int argc, char **argv)
1212 {
1213         struct rtnl_handle rth;
1214         struct {
1215                 struct nlmsghdr         n;
1216                 struct rtmsg            r;
1217                 char                    buf[1024];
1218         } req;
1219         char  *idev = NULL;
1220         char  *odev = NULL;
1221         int connected = 0;
1222         int from_ok = 0;
1223
1224         memset(&req, 0, sizeof(req));
1225
1226         iproute_reset_filter();
1227
1228         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1229         req.n.nlmsg_flags = NLM_F_REQUEST;
1230         req.n.nlmsg_type = RTM_GETROUTE;
1231         req.r.rtm_family = preferred_family;
1232         req.r.rtm_table = 0;
1233         req.r.rtm_protocol = 0;
1234         req.r.rtm_scope = 0;
1235         req.r.rtm_type = 0;
1236         req.r.rtm_src_len = 0;
1237         req.r.rtm_dst_len = 0;
1238         req.r.rtm_tos = 0;
1239
1240         while (argc > 0) {
1241                 if (strcmp(*argv, "tos") == 0 ||
1242                     matches(*argv, "dsfield") == 0) {
1243                         __u32 tos;
1244                         NEXT_ARG();
1245                         if (rtnl_dsfield_a2n(&tos, *argv))
1246                                 invarg("TOS value is invalid\n", *argv);
1247                         req.r.rtm_tos = tos;
1248                 } else if (matches(*argv, "from") == 0) {
1249                         inet_prefix addr;
1250                         NEXT_ARG();
1251                         if (matches(*argv, "help") == 0)
1252                                 usage();
1253                         from_ok = 1;
1254                         get_prefix(&addr, *argv, req.r.rtm_family);
1255                         if (req.r.rtm_family == AF_UNSPEC)
1256                                 req.r.rtm_family = addr.family;
1257                         if (addr.bytelen)
1258                                 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1259                         req.r.rtm_src_len = addr.bitlen;
1260                 } else if (matches(*argv, "iif") == 0) {
1261                         NEXT_ARG();
1262                         idev = *argv;
1263                 } else if (matches(*argv, "oif") == 0 ||
1264                            strcmp(*argv, "dev") == 0) {
1265                         NEXT_ARG();
1266                         odev = *argv;
1267                 } else if (matches(*argv, "notify") == 0) {
1268                         req.r.rtm_flags |= RTM_F_NOTIFY;
1269                 } else if (matches(*argv, "connected") == 0) {
1270                         connected = 1;
1271                 } else {
1272                         inet_prefix addr;
1273                         if (strcmp(*argv, "to") == 0) {
1274                                 NEXT_ARG();
1275                         }
1276                         if (matches(*argv, "help") == 0)
1277                                 usage();
1278                         get_prefix(&addr, *argv, req.r.rtm_family);
1279                         if (req.r.rtm_family == AF_UNSPEC)
1280                                 req.r.rtm_family = addr.family;
1281                         if (addr.bytelen)
1282                                 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1283                         req.r.rtm_dst_len = addr.bitlen;
1284                 }
1285                 argc--; argv++;
1286         }
1287
1288         if (req.r.rtm_dst_len == 0) {
1289                 fprintf(stderr, "need at least destination address\n");
1290                 exit(1);
1291         }
1292
1293         if (rtnl_open(&rth, 0) < 0)
1294                 exit(1);
1295
1296         ll_init_map(&rth);
1297
1298         if (idev || odev)  {
1299                 int idx;
1300
1301                 if (idev) {
1302                         if ((idx = ll_name_to_index(idev)) == 0) {
1303                                 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1304                                 return -1;
1305                         }
1306                         addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1307                 }
1308                 if (odev) {
1309                         if ((idx = ll_name_to_index(odev)) == 0) {
1310                                 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1311                                 return -1;
1312                         }
1313                         addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1314                 }
1315         }
1316
1317         if (req.r.rtm_family == AF_UNSPEC)
1318                 req.r.rtm_family = AF_INET;
1319
1320         if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1321                 exit(2);
1322
1323         if (connected && !from_ok) {
1324                 struct rtmsg *r = NLMSG_DATA(&req.n);
1325                 int len = req.n.nlmsg_len;
1326                 struct rtattr * tb[RTA_MAX+1];
1327
1328                 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1329                         fprintf(stderr, "An error :-)\n");
1330                         exit(1);
1331                 }
1332
1333                 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1334                         fprintf(stderr, "Not a route?\n");
1335                         return -1;
1336                 }
1337                 len -= NLMSG_LENGTH(sizeof(*r));
1338                 if (len < 0) {
1339                         fprintf(stderr, "Wrong len %d\n", len);
1340                         return -1;
1341                 }
1342
1343                 memset(tb, 0, sizeof(tb));
1344                 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1345
1346                 if (tb[RTA_PREFSRC]) {
1347                         tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1348                         r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1349                 } else if (!tb[RTA_SRC]) {
1350                         fprintf(stderr, "Failed to connect the route\n");
1351                         return -1;
1352                 }
1353                 if (!odev && tb[RTA_OIF])
1354                         tb[RTA_OIF]->rta_type = 0;
1355                 if (tb[RTA_GATEWAY])
1356                         tb[RTA_GATEWAY]->rta_type = 0;
1357                 if (!idev && tb[RTA_IIF])
1358                         tb[RTA_IIF]->rta_type = 0;
1359                 req.n.nlmsg_flags = NLM_F_REQUEST;
1360                 req.n.nlmsg_type = RTM_GETROUTE;
1361
1362                 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1363                         exit(2);
1364         }
1365
1366         if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1367                 fprintf(stderr, "An error :-)\n");
1368                 exit(1);
1369         }
1370
1371         exit(0);
1372 }
1373
1374 void iproute_reset_filter()
1375 {
1376         memset(&filter, 0, sizeof(filter));
1377         filter.mdst.bitlen = -1;
1378         filter.msrc.bitlen = -1;
1379 }
1380
1381 int do_iproute(int argc, char **argv)
1382 {
1383         if (argc < 1)
1384                 return iproute_list_or_flush(0, NULL, 0);
1385
1386         if (matches(*argv, "add") == 0)
1387                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1388                                       argc-1, argv+1);
1389         if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1390                 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1391                                       argc-1, argv+1);
1392         if (matches(*argv, "replace") == 0)
1393                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1394                                       argc-1, argv+1);
1395         if (matches(*argv, "prepend") == 0)
1396                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1397                                       argc-1, argv+1);
1398         if (matches(*argv, "append") == 0)
1399                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1400                                       argc-1, argv+1);
1401         if (matches(*argv, "test") == 0)
1402                 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1403                                       argc-1, argv+1);
1404         if (matches(*argv, "delete") == 0)
1405                 return iproute_modify(RTM_DELROUTE, 0,
1406                                       argc-1, argv+1);
1407         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1408             || matches(*argv, "lst") == 0)
1409                 return iproute_list_or_flush(argc-1, argv+1, 0);
1410         if (matches(*argv, "get") == 0)
1411                 return iproute_get(argc-1, argv+1);
1412         if (matches(*argv, "flush") == 0)
1413                 return iproute_list_or_flush(argc-1, argv+1, 1);
1414         if (matches(*argv, "help") == 0)
1415                 usage();
1416         fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1417         exit(-1);
1418 }
1419