ip/iproute.c.initvar

   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                 rta->rta_len += rtnh->rtnh_len;
 620                 parse_one_nh(rta, rtnh, &argc, &argv);
 621                 rtnh = RTNH_NEXT(rtnh);
 622         }
 623
 624         if (rta->rta_len > RTA_LENGTH(0))
 625                 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
 626         return 0;
 627 }
 628
 629
 630 int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
 631 {
 632         struct rtnl_handle rth;
 633         struct {
 634                 struct nlmsghdr         n;
 635                 struct rtmsg            r;
 636                 char                    buf[1024];
 637         } req;
 638         char  mxbuf[256];
 639         struct rtattr * mxrta = (void*)mxbuf;
 640         unsigned mxlock = 0;
 641         char  *d = NULL;
 642         int gw_ok = 0;
 643         int dst_ok = 0;
 644         int nhs_ok = 0;
 645         int scope_ok = 0;
 646         int table_ok = 0;
 647         int proto_ok = 0;
 648         int type_ok = 0;
 649
 650         memset(&req, 0, sizeof(req));
 651
 652         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
 653         req.n.nlmsg_flags = NLM_F_REQUEST|flags;
 654         req.n.nlmsg_type = cmd;
 655         req.r.rtm_family = preferred_family;
 656         req.r.rtm_table = RT_TABLE_MAIN;
 657         req.r.rtm_scope = RT_SCOPE_NOWHERE;
 658
 659         if (cmd != RTM_DELROUTE) {
 660                 req.r.rtm_protocol = RTPROT_BOOT;
 661                 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
 662                 req.r.rtm_type = RTN_UNICAST;
 663         }
 664
 665         mxrta->rta_type = RTA_METRICS;
 666         mxrta->rta_len = RTA_LENGTH(0);
 667
 668         while (argc > 0) {
 669                 if (strcmp(*argv, "src") == 0) {
 670                         inet_prefix addr;
 671                         NEXT_ARG();
 672                         get_addr(&addr, *argv, req.r.rtm_family);
 673                         if (req.r.rtm_family == AF_UNSPEC)
 674                                 req.r.rtm_family = addr.family;
 675                         addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
 676                 } else if (strcmp(*argv, "via") == 0) {
 677                         inet_prefix addr;
 678                         gw_ok = 1;
 679                         NEXT_ARG();
 680                         get_addr(&addr, *argv, req.r.rtm_family);
 681                         if (req.r.rtm_family == AF_UNSPEC)
 682                                 req.r.rtm_family = addr.family;
 683                         addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
 684                 } else if (strcmp(*argv, "from") == 0) {
 685                         inet_prefix addr;
 686                         NEXT_ARG();
 687                         get_prefix(&addr, *argv, req.r.rtm_family);
 688                         if (req.r.rtm_family == AF_UNSPEC)
 689                                 req.r.rtm_family = addr.family;
 690                         if (addr.bytelen)
 691                                 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
 692                         req.r.rtm_src_len = addr.bitlen;
 693                 } else if (strcmp(*argv, "tos") == 0 ||
 694                            matches(*argv, "dsfield") == 0) {
 695                         __u32 tos;
 696                         NEXT_ARG();
 697                         if (rtnl_dsfield_a2n(&tos, *argv))
 698                                 invarg("\"tos\" value is invalid\n", *argv);
 699                         req.r.rtm_tos = tos;
 700                 } else if (matches(*argv, "metric") == 0 ||
 701                            matches(*argv, "priority") == 0 ||
 702                            matches(*argv, "preference") == 0) {
 703                         __u32 metric;
 704                         NEXT_ARG();
 705                         if (get_u32(&metric, *argv, 0))
 706                                 invarg("\"metric\" value is invalid\n", *argv);
 707                         addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
 708                 } else if (strcmp(*argv, "scope") == 0) {
 709                         int scope = 0;
 710                         NEXT_ARG();
 711                         if (rtnl_rtscope_a2n(&scope, *argv))
 712                                 invarg("invalid \"scope\" value\n", *argv);
 713                         req.r.rtm_scope = scope;
 714                         scope_ok = 1;
 715                 } else if (strcmp(*argv, "mtu") == 0) {
 716                         unsigned mtu;
 717                         NEXT_ARG();
 718                         if (strcmp(*argv, "lock") == 0) {
 719                                 mxlock |= (1<<RTAX_MTU);
 720                                 NEXT_ARG();
 721                         }
 722                         if (get_unsigned(&mtu, *argv, 0))
 723                                 invarg("\"mtu\" value is invalid\n", *argv);
 724                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
 725 #ifdef RTAX_ADVMSS
 726                 } else if (strcmp(*argv, "advmss") == 0) {
 727                         unsigned mss;
 728                         NEXT_ARG();
 729                         if (strcmp(*argv, "lock") == 0) {
 730                                 mxlock |= (1<<RTAX_ADVMSS);
 731                                 NEXT_ARG();
 732                         }
 733                         if (get_unsigned(&mss, *argv, 0))
 734                                 invarg("\"mss\" value is invalid\n", *argv);
 735                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
 736 #endif
 737 #ifdef RTAX_REORDERING
 738                 } else if (matches(*argv, "reordering") == 0) {
 739                         unsigned reord;
 740                         NEXT_ARG();
 741                         if (strcmp(*argv, "lock") == 0) {
 742                                 mxlock |= (1<<RTAX_REORDERING);
 743                                 NEXT_ARG();
 744                         }
 745                         if (get_unsigned(&reord, *argv, 0))
 746                                 invarg("\"reordering\" value is invalid\n", *argv);
 747                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
 748 #endif
 749                 } else if (strcmp(*argv, "rtt") == 0) {
 750                         unsigned rtt;
 751                         NEXT_ARG();
 752                         if (strcmp(*argv, "lock") == 0) {
 753                                 mxlock |= (1<<RTAX_RTT);
 754                                 NEXT_ARG();
 755                         }
 756                         if (get_unsigned(&rtt, *argv, 0))
 757                                 invarg("\"rtt\" value is invalid\n", *argv);
 758                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, rtt);
 759                 } else if (matches(*argv, "window") == 0) {
 760                         unsigned win;
 761                         NEXT_ARG();
 762                         if (strcmp(*argv, "lock") == 0) {
 763                                 mxlock |= (1<<RTAX_WINDOW);
 764                                 NEXT_ARG();
 765                         }
 766                         if (get_unsigned(&win, *argv, 0))
 767                                 invarg("\"window\" value is invalid\n", *argv);
 768                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
 769                 } else if (matches(*argv, "cwnd") == 0) {
 770                         unsigned win;
 771                         NEXT_ARG();
 772                         if (strcmp(*argv, "lock") == 0) {
 773                                 mxlock |= (1<<RTAX_CWND);
 774                                 NEXT_ARG();
 775                         }
 776                         if (get_unsigned(&win, *argv, 0))
 777                                 invarg("\"cwnd\" value is invalid\n", *argv);
 778                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
 779                 } else if (matches(*argv, "rttvar") == 0) {
 780                         unsigned win;
 781                         NEXT_ARG();
 782                         if (strcmp(*argv, "lock") == 0) {
 783                                 mxlock |= (1<<RTAX_RTTVAR);
 784                                 NEXT_ARG();
 785                         }
 786                         if (get_unsigned(&win, *argv, 0))
 787                                 invarg("\"rttvar\" value is invalid\n", *argv);
 788                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, win);
 789                 } else if (matches(*argv, "ssthresh") == 0) {
 790                         unsigned win;
 791                         NEXT_ARG();
 792                         if (strcmp(*argv, "lock") == 0) {
 793                                 mxlock |= (1<<RTAX_SSTHRESH);
 794                                 NEXT_ARG();
 795                         }
 796                         if (get_unsigned(&win, *argv, 0))
 797                                 invarg("\"ssthresh\" value is invalid\n", *argv);
 798                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
 799                 } else if (matches(*argv, "realms") == 0) {
 800                         __u32 realm;
 801                         NEXT_ARG();
 802                         if (get_rt_realms(&realm, *argv))
 803                                 invarg("\"realm\" value is invalid\n", *argv);
 804                         addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
 805                 } else if (strcmp(*argv, "onlink") == 0) {
 806                         req.r.rtm_flags |= RTNH_F_ONLINK;
 807                 } else if (matches(*argv, "equalize") == 0 ||
 808                            strcmp(*argv, "eql") == 0) {
 809                         req.r.rtm_flags |= RTM_F_EQUALIZE;
 810                 } else if (strcmp(*argv, "nexthop") == 0) {
 811                         nhs_ok = 1;
 812                         break;
 813                 } else if (matches(*argv, "protocol") == 0) {
 814                         int prot;
 815                         NEXT_ARG();
 816                         if (rtnl_rtprot_a2n(&prot, *argv))
 817                                 invarg("\"protocol\" value is invalid\n", *argv);
 818                         req.r.rtm_protocol = prot;
 819                         proto_ok =1;
 820                 } else if (matches(*argv, "table") == 0) {
 821                         int tid;
 822                         NEXT_ARG();
 823                         if (rtnl_rttable_a2n(&tid, *argv))
 824                                 invarg("\"table\" value is invalid\n", *argv);
 825                         req.r.rtm_table = tid;
 826                         table_ok = 1;
 827                 } else if (strcmp(*argv, "dev") == 0 ||
 828                            strcmp(*argv, "oif") == 0) {
 829                         NEXT_ARG();
 830                         d = *argv;
 831                 } else {
 832                         int type;
 833                         inet_prefix dst;
 834
 835                         if (strcmp(*argv, "to") == 0) {
 836                                 NEXT_ARG();
 837                         }
 838                         if ((**argv < '0' || **argv > '9') &&
 839                             rtnl_rtntype_a2n(&type, *argv) == 0) {
 840                                 NEXT_ARG();
 841                                 req.r.rtm_type = type;
 842                                 type_ok = 1;
 843                         }
 844
 845                         if (matches(*argv, "help") == 0)
 846                                 usage();
 847                         if (dst_ok)
 848                                 duparg2("to", *argv);
 849                         get_prefix(&dst, *argv, req.r.rtm_family);
 850                         if (req.r.rtm_family == AF_UNSPEC)
 851                                 req.r.rtm_family = dst.family;
 852                         req.r.rtm_dst_len = dst.bitlen;
 853                         dst_ok = 1;
 854                         if (dst.bytelen)
 855                                 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
 856                 }
 857                 argc--; argv++;
 858         }
 859
 860         if (rtnl_open(&rth, 0) < 0)
 861                 exit(1);
 862
 863         if (d || nhs_ok)  {
 864                 int idx;
 865
 866                 ll_init_map(&rth);
 867
 868                 if (d) {
 869                         if ((idx = ll_name_to_index(d)) == 0) {
 870                                 fprintf(stderr, "Cannot find device \"%s\"\n", d);
 871                                 return -1;
 872                         }
 873                         addattr32(&req.n, sizeof(req), RTA_OIF, idx);
 874                 }
 875         }
 876
 877         if (mxrta->rta_len > RTA_LENGTH(0)) {
 878                 if (mxlock)
 879                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
 880                 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
 881         }
 882
 883         if (nhs_ok)
 884                 parse_nexthops(&req.n, &req.r, argc, argv);
 885
 886         if (!table_ok) {
 887                 if (req.r.rtm_type == RTN_LOCAL ||
 888                     req.r.rtm_type == RTN_BROADCAST ||
 889                     req.r.rtm_type == RTN_NAT ||
 890                     req.r.rtm_type == RTN_ANYCAST)
 891                         req.r.rtm_table = RT_TABLE_LOCAL;
 892         }
 893         if (!scope_ok) {
 894                 if (req.r.rtm_type == RTN_LOCAL ||
 895                     req.r.rtm_type == RTN_NAT)
 896                         req.r.rtm_scope = RT_SCOPE_HOST;
 897                 else if (req.r.rtm_type == RTN_BROADCAST ||
 898                          req.r.rtm_type == RTN_MULTICAST ||
 899                          req.r.rtm_type == RTN_ANYCAST)
 900                         req.r.rtm_scope = RT_SCOPE_LINK;
 901                 else if (req.r.rtm_type == RTN_UNICAST ||
 902                          req.r.rtm_type == RTN_UNSPEC) {
 903                         if (cmd == RTM_DELROUTE)
 904                                 req.r.rtm_scope = RT_SCOPE_NOWHERE;
 905                         else if (!gw_ok && !nhs_ok)
 906                                 req.r.rtm_scope = RT_SCOPE_LINK;
 907                 }
 908         }
 909
 910         if (req.r.rtm_family == AF_UNSPEC)
 911                 req.r.rtm_family = AF_INET;
 912
 913         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 914                 exit(2);
 915
 916         return 0;
 917 }
 918
 919 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
 920 {
 921         struct {
 922                 struct nlmsghdr nlh;
 923                 struct rtmsg rtm;
 924         } req;
 925         struct sockaddr_nl nladdr;
 926
 927         memset(&nladdr, 0, sizeof(nladdr));
 928         memset(&req, 0, sizeof(req));
 929         nladdr.nl_family = AF_NETLINK;
 930
 931         req.nlh.nlmsg_len = sizeof(req);
 932         req.nlh.nlmsg_type = RTM_GETROUTE;
 933         req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
 934         req.nlh.nlmsg_pid = 0;
 935         req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
 936         req.rtm.rtm_family = family;
 937         req.rtm.rtm_flags |= RTM_F_CLONED;
 938
 939         return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
 940 }
 941
 942 static int iproute_flush_cache(void)
 943 {
 944 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
 945
 946         int len;
 947         int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
 948         char *buffer = "-1";
 949
 950         if (flush_fd < 0) {
 951                 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
 952                 return -1;
 953         }
 954
 955         len = strlen (buffer);
 956
 957         if ((write (flush_fd, (void *)buffer, len)) < len) {
 958                 fprintf (stderr, "Cannot flush routing cache\n");
 959                 return -1;
 960         }
 961         close(flush_fd);
 962         return 0;
 963 }
 964
 965
 966 static int iproute_list_or_flush(int argc, char **argv, int flush)
 967 {
 968         int do_ipv6 = preferred_family;
 969         struct rtnl_handle rth;
 970         char *id = NULL;
 971         char *od = NULL;
 972
 973         iproute_reset_filter();
 974         filter.tb = RT_TABLE_MAIN;
 975
 976         if (flush && argc <= 0) {
 977                 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
 978                 return -1;
 979         }
 980
 981         while (argc > 0) {
 982                 if (matches(*argv, "table") == 0) {
 983                         int tid;
 984                         NEXT_ARG();
 985                         if (rtnl_rttable_a2n(&tid, *argv)) {
 986                                 if (strcmp(*argv, "all") == 0) {
 987                                         tid = 0;
 988                                 } else if (strcmp(*argv, "cache") == 0) {
 989                                         tid = -1;
 990                                 } else if (strcmp(*argv, "help") == 0) {
 991                                         usage();
 992                                 } else {
 993                                         invarg("table id value is invalid\n", *argv);
 994                                 }
 995                         }
 996                         filter.tb = tid;
 997                 } else if (matches(*argv, "cached") == 0 ||
 998                            matches(*argv, "cloned") == 0) {
 999                         filter.tb = -1;
1000                 } else if (strcmp(*argv, "tos") == 0 ||
1001                            matches(*argv, "dsfield") == 0) {
1002                         __u32 tos;
1003                         NEXT_ARG();
1004                         if (rtnl_dsfield_a2n(&tos, *argv))
1005                                 invarg("TOS value is invalid\n", *argv);
1006                         filter.tos = tos;
1007                         filter.tosmask = -1;
1008                 } else if (matches(*argv, "protocol") == 0) {
1009                         int prot = 0;
1010                         NEXT_ARG();
1011                         filter.protocolmask = -1;
1012                         if (rtnl_rtprot_a2n(&prot, *argv)) {
1013                                 if (strcmp(*argv, "all") != 0)
1014                                         invarg("invalid \"protocol\"\n", *argv);
1015                                 prot = 0;
1016                                 filter.protocolmask = 0;
1017                         }
1018                         filter.protocol = prot;
1019                 } else if (matches(*argv, "scope") == 0) {
1020                         int scope = 0;
1021                         NEXT_ARG();
1022                         filter.scopemask = -1;
1023                         if (rtnl_rtscope_a2n(&scope, *argv)) {
1024                                 if (strcmp(*argv, "all") != 0)
1025                                         invarg("invalid \"scope\"\n", *argv);
1026                                 scope = RT_SCOPE_NOWHERE;
1027                                 filter.scopemask = 0;
1028                         }
1029                         filter.scope = scope;
1030                 } else if (matches(*argv, "type") == 0) {
1031                         int type;
1032                         NEXT_ARG();
1033                         filter.typemask = -1;
1034                         if (rtnl_rtntype_a2n(&type, *argv))
1035                                 invarg("node type value is invalid\n", *argv);
1036                         filter.type = type;
1037                 } else if (strcmp(*argv, "dev") == 0 ||
1038                            strcmp(*argv, "oif") == 0) {
1039                         NEXT_ARG();
1040                         od = *argv;
1041                 } else if (strcmp(*argv, "iif") == 0) {
1042                         NEXT_ARG();
1043                         id = *argv;
1044                 } else if (strcmp(*argv, "via") == 0) {
1045                         NEXT_ARG();
1046                         get_prefix(&filter.rvia, *argv, do_ipv6);
1047                 } else if (strcmp(*argv, "src") == 0) {
1048                         NEXT_ARG();
1049                         get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1050                 } else if (matches(*argv, "realms") == 0) {
1051                         __u32 realm;
1052                         NEXT_ARG();
1053                         if (get_rt_realms(&realm, *argv))
1054                                 invarg("invalid realms\n", *argv);
1055                         filter.realm = realm;
1056                         filter.realmmask = ~0U;
1057                         if ((filter.realm&0xFFFF) == 0 &&
1058                             (*argv)[strlen(*argv) - 1] == '/')
1059                                 filter.realmmask &= ~0xFFFF;
1060                         if ((filter.realm&0xFFFF0000U) == 0 &&
1061                             (strchr(*argv, '/') == NULL ||
1062                              (*argv)[0] == '/'))
1063                                 filter.realmmask &= ~0xFFFF0000U;
1064                 } else if (matches(*argv, "from") == 0) {
1065                         NEXT_ARG();
1066                         if (matches(*argv, "root") == 0) {
1067                                 NEXT_ARG();
1068                                 get_prefix(&filter.rsrc, *argv, do_ipv6);
1069                         } else if (matches(*argv, "match") == 0) {
1070                                 NEXT_ARG();
1071                                 get_prefix(&filter.msrc, *argv, do_ipv6);
1072                         } else {
1073                                 if (matches(*argv, "exact") == 0) {
1074                                         NEXT_ARG();
1075                                 }
1076                                 get_prefix(&filter.msrc, *argv, do_ipv6);
1077                                 filter.rsrc = filter.msrc;
1078                         }
1079                 } else {
1080                         if (matches(*argv, "to") == 0) {
1081                                 NEXT_ARG();
1082                         }
1083                         if (matches(*argv, "root") == 0) {
1084                                 NEXT_ARG();
1085                                 get_prefix(&filter.rdst, *argv, do_ipv6);
1086                         } else if (matches(*argv, "match") == 0) {
1087                                 NEXT_ARG();
1088                                 get_prefix(&filter.mdst, *argv, do_ipv6);
1089                         } else {
1090                                 if (matches(*argv, "exact") == 0) {
1091                                         NEXT_ARG();
1092                                 }
1093                                 get_prefix(&filter.mdst, *argv, do_ipv6);
1094                                 filter.rdst = filter.mdst;
1095                         }
1096                 }
1097                 argc--; argv++;
1098         }
1099
1100         if (do_ipv6 == AF_UNSPEC && filter.tb)
1101                 do_ipv6 = AF_INET;
1102
1103         if (rtnl_open(&rth, 0) < 0)
1104                 exit(1);
1105
1106         ll_init_map(&rth);
1107
1108         if (id || od)  {
1109                 int idx;
1110
1111                 if (id) {
1112                         if ((idx = ll_name_to_index(id)) == 0) {
1113                                 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1114                                 return -1;
1115                         }
1116                         filter.iif = idx;
1117                         filter.iifmask = -1;
1118                 }
1119                 if (od) {
1120                         if ((idx = ll_name_to_index(od)) == 0) {
1121                                 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1122                                 return -1;
1123                         }
1124                         filter.oif = idx;
1125                         filter.oifmask = -1;
1126                 }
1127         }
1128
1129         if (flush) {
1130                 int round = 0;
1131                 char flushb[4096-512];
1132                 time_t start = time(0);
1133
1134                 if (filter.tb == -1) {
1135                         if (do_ipv6 != AF_INET6) {
1136                                 iproute_flush_cache();
1137                                 if (show_stats)
1138                                         printf("*** IPv4 routing cache is flushed.\n");
1139                         }
1140                         if (do_ipv6 == AF_INET)
1141                                 return 0;
1142                 }
1143
1144                 filter.flushb = flushb;
1145                 filter.flushp = 0;
1146                 filter.flushe = sizeof(flushb);
1147                 filter.rth = &rth;
1148
1149                 for (;;) {
1150                         if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1151                                 perror("Cannot send dump request");
1152                                 exit(1);
1153                         }
1154                         filter.flushed = 0;
1155                         if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1156                                 fprintf(stderr, "Flush terminated\n");
1157                                 exit(1);
1158                         }
1159                         if (filter.flushed == 0) {
1160                                 if (round == 0) {
1161                                         if (filter.tb != -1 || do_ipv6 == AF_INET6)
1162                                                 fprintf(stderr, "Nothing to flush.\n");
1163                                 } else if (show_stats)
1164                                         printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
1165                                 fflush(stdout);
1166                                 return 0;
1167                         }
1168                         round++;
1169                         if (flush_update() < 0)
1170                                 exit(1);
1171
1172                         if (time(0) - start > 30) {
1173                                 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1174                                        time(0) - start, filter.flushed);
1175                                 exit(1);
1176                         }
1177
1178                         if (show_stats) {
1179                                 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1180                                 fflush(stdout);
1181                         }
1182                 }
1183         }
1184
1185         if (filter.tb != -1) {
1186                 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1187                         perror("Cannot send dump request");
1188                         exit(1);
1189                 }
1190         } else {
1191                 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1192                         perror("Cannot send dump request");
1193                         exit(1);
1194                 }
1195         }
1196
1197         if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1198                 fprintf(stderr, "Dump terminated\n");
1199                 exit(1);
1200         }
1201
1202         exit(0);
1203 }
1204
1205
1206 int iproute_get(int argc, char **argv)
1207 {
1208         struct rtnl_handle rth;
1209         struct {
1210                 struct nlmsghdr         n;
1211                 struct rtmsg            r;
1212                 char                    buf[1024];
1213         } req;
1214         char  *idev = NULL;
1215         char  *odev = NULL;
1216         int connected = 0;
1217         int from_ok = 0;
1218
1219         memset(&req, 0, sizeof(req));
1220
1221         iproute_reset_filter();
1222
1223         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1224         req.n.nlmsg_flags = NLM_F_REQUEST;
1225         req.n.nlmsg_type = RTM_GETROUTE;
1226         req.r.rtm_family = preferred_family;
1227         req.r.rtm_table = 0;
1228         req.r.rtm_protocol = 0;
1229         req.r.rtm_scope = 0;
1230         req.r.rtm_type = 0;
1231         req.r.rtm_src_len = 0;
1232         req.r.rtm_dst_len = 0;
1233         req.r.rtm_tos = 0;
1234
1235         while (argc > 0) {
1236                 if (strcmp(*argv, "tos") == 0 ||
1237                     matches(*argv, "dsfield") == 0) {
1238                         __u32 tos;
1239                         NEXT_ARG();
1240                         if (rtnl_dsfield_a2n(&tos, *argv))
1241                                 invarg("TOS value is invalid\n", *argv);
1242                         req.r.rtm_tos = tos;
1243                 } else if (matches(*argv, "from") == 0) {
1244                         inet_prefix addr;
1245                         NEXT_ARG();
1246                         if (matches(*argv, "help") == 0)
1247                                 usage();
1248                         from_ok = 1;
1249                         get_prefix(&addr, *argv, req.r.rtm_family);
1250                         if (req.r.rtm_family == AF_UNSPEC)
1251                                 req.r.rtm_family = addr.family;
1252                         if (addr.bytelen)
1253                                 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1254                         req.r.rtm_src_len = addr.bitlen;
1255                 } else if (matches(*argv, "iif") == 0) {
1256                         NEXT_ARG();
1257                         idev = *argv;
1258                 } else if (matches(*argv, "oif") == 0 ||
1259                            strcmp(*argv, "dev") == 0) {
1260                         NEXT_ARG();
1261                         odev = *argv;
1262                 } else if (matches(*argv, "notify") == 0) {
1263                         req.r.rtm_flags |= RTM_F_NOTIFY;
1264                 } else if (matches(*argv, "connected") == 0) {
1265                         connected = 1;
1266                 } else {
1267                         inet_prefix addr;
1268                         if (strcmp(*argv, "to") == 0) {
1269                                 NEXT_ARG();
1270                         }
1271                         if (matches(*argv, "help") == 0)
1272                                 usage();
1273                         get_prefix(&addr, *argv, req.r.rtm_family);
1274                         if (req.r.rtm_family == AF_UNSPEC)
1275                                 req.r.rtm_family = addr.family;
1276                         if (addr.bytelen)
1277                                 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1278                         req.r.rtm_dst_len = addr.bitlen;
1279                 }
1280                 argc--; argv++;
1281         }
1282
1283         if (req.r.rtm_dst_len == 0) {
1284                 fprintf(stderr, "need at least destination address\n");
1285                 exit(1);
1286         }
1287
1288         if (rtnl_open(&rth, 0) < 0)
1289                 exit(1);
1290
1291         ll_init_map(&rth);
1292
1293         if (idev || odev)  {
1294                 int idx;
1295
1296                 if (idev) {
1297                         if ((idx = ll_name_to_index(idev)) == 0) {
1298                                 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1299                                 return -1;
1300                         }
1301                         addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1302                 }
1303                 if (odev) {
1304                         if ((idx = ll_name_to_index(odev)) == 0) {
1305                                 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1306                                 return -1;
1307                         }
1308                         addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1309                 }
1310         }
1311
1312         if (req.r.rtm_family == AF_UNSPEC)
1313                 req.r.rtm_family = AF_INET;
1314
1315         if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1316                 exit(2);
1317
1318         if (connected && !from_ok) {
1319                 struct rtmsg *r = NLMSG_DATA(&req.n);
1320                 int len = req.n.nlmsg_len;
1321                 struct rtattr * tb[RTA_MAX+1];
1322
1323                 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1324                         fprintf(stderr, "An error :-)\n");
1325                         exit(1);
1326                 }
1327
1328                 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1329                         fprintf(stderr, "Not a route?\n");
1330                         return -1;
1331                 }
1332                 len -= NLMSG_LENGTH(sizeof(*r));
1333                 if (len < 0) {
1334                         fprintf(stderr, "Wrong len %d\n", len);
1335                         return -1;
1336                 }
1337
1338                 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1339
1340                 if (tb[RTA_PREFSRC]) {
1341                         tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1342                         r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1343                 } else if (!tb[RTA_SRC]) {
1344                         fprintf(stderr, "Failed to connect the route\n");
1345                         return -1;
1346                 }
1347                 if (!odev && tb[RTA_OIF])
1348                         tb[RTA_OIF]->rta_type = 0;
1349                 if (tb[RTA_GATEWAY])
1350                         tb[RTA_GATEWAY]->rta_type = 0;
1351                 if (!idev && tb[RTA_IIF])
1352                         tb[RTA_IIF]->rta_type = 0;
1353                 req.n.nlmsg_flags = NLM_F_REQUEST;
1354                 req.n.nlmsg_type = RTM_GETROUTE;
1355
1356                 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1357                         exit(2);
1358         }
1359
1360         if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1361                 fprintf(stderr, "An error :-)\n");
1362                 exit(1);
1363         }
1364
1365         exit(0);
1366 }
1367
1368 void iproute_reset_filter()
1369 {
1370         memset(&filter, 0, sizeof(filter));
1371         filter.mdst.bitlen = -1;
1372         filter.msrc.bitlen = -1;
1373 }
1374
1375 int do_iproute(int argc, char **argv)
1376 {
1377         if (argc < 1)
1378                 return iproute_list_or_flush(0, NULL, 0);
1379
1380         if (matches(*argv, "add") == 0)
1381                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1382                                       argc-1, argv+1);
1383         if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1384                 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1385                                       argc-1, argv+1);
1386         if (matches(*argv, "replace") == 0)
1387                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1388                                       argc-1, argv+1);
1389         if (matches(*argv, "prepend") == 0)
1390                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1391                                       argc-1, argv+1);
1392         if (matches(*argv, "append") == 0)
1393                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1394                                       argc-1, argv+1);
1395         if (matches(*argv, "test") == 0)
1396                 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1397                                       argc-1, argv+1);
1398         if (matches(*argv, "delete") == 0)
1399                 return iproute_modify(RTM_DELROUTE, 0,
1400                                       argc-1, argv+1);
1401         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1402             || matches(*argv, "lst") == 0)
1403                 return iproute_list_or_flush(argc-1, argv+1, 0);
1404         if (matches(*argv, "get") == 0)
1405                 return iproute_get(argc-1, argv+1);
1406         if (matches(*argv, "flush") == 0)
1407                 return iproute_list_or_flush(argc-1, argv+1, 1);
1408         if (matches(*argv, "help") == 0)
1409                 usage();
1410         fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1411         exit(-1);
1412 }
1413