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