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
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <syslog.h>
  17 #include <fcntl.h>
  18 #include <string.h>
  19 #include <time.h>
  20 #include <sys/time.h>
  21 #include <sys/socket.h>
  22 #include <netinet/in.h>
  23 #include <netinet/ip.h>
  24 #include <arpa/inet.h>
  25 #include <linux/in_route.h>
  26 #include <errno.h>
  27
  28 #include "rt_names.h"
  29 #include "utils.h"
  30 #include "ip_common.h"
  31
  32 #ifndef RTAX_RTTVAR
  33 #define RTAX_RTTVAR RTAX_HOPS
  34 #endif
  35
  36 enum list_action {
  37         IPROUTE_LIST,
  38         IPROUTE_FLUSH,
  39         IPROUTE_SAVE,
  40 };
  41 static const char *mx_names[RTAX_MAX+1] = {
  42         [RTAX_MTU]      = "mtu",
  43         [RTAX_WINDOW]   = "window",
  44         [RTAX_RTT]      = "rtt",
  45         [RTAX_RTTVAR]   = "rttvar",
  46         [RTAX_SSTHRESH] = "ssthresh",
  47         [RTAX_CWND]     = "cwnd",
  48         [RTAX_ADVMSS]   = "advmss",
  49         [RTAX_REORDERING]="reordering",
  50         [RTAX_HOPLIMIT] = "hoplimit",
  51         [RTAX_INITCWND] = "initcwnd",
  52         [RTAX_FEATURES] = "features",
  53         [RTAX_RTO_MIN]  = "rto_min",
  54         [RTAX_INITRWND] = "initrwnd",
  55 };
  56 static void usage(void) __attribute__((noreturn));
  57
  58 static void usage(void)
  59 {
  60         fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
  61         fprintf(stderr, "       ip route save SELECTOR\n");
  62         fprintf(stderr, "       ip route restore\n");
  63         fprintf(stderr, "       ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
  64         fprintf(stderr, "                            [ oif STRING ]  [ tos TOS ]\n");
  65         fprintf(stderr, "                            [ mark NUMBER ]\n");
  66         fprintf(stderr, "       ip route { add | del | change | append | replace | monitor } ROUTE\n");
  67         fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
  68         fprintf(stderr, "            [ table TABLE_ID ] [ proto RTPROTO ]\n");
  69         fprintf(stderr, "            [ type TYPE ] [ scope SCOPE ]\n");
  70         fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
  71         fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
  72         fprintf(stderr, "             [ table TABLE_ID ] [ proto RTPROTO ]\n");
  73         fprintf(stderr, "             [ scope SCOPE ] [ metric METRIC ]\n");
  74         fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
  75         fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
  76         fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n");
  77         fprintf(stderr, "           [ rtt TIME ] [ rttvar TIME ] [reordering NUMBER ]\n");
  78         fprintf(stderr, "           [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
  79         fprintf(stderr, "           [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
  80         fprintf(stderr, "           [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
  81         fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n");
  82         fprintf(stderr, "          unreachable | prohibit | blackhole | nat ]\n");
  83         fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
  84         fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
  85         fprintf(stderr, "MP_ALGO := { rr | drr | random | wrandom }\n");
  86         fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
  87         fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
  88         fprintf(stderr, "TIME := NUMBER[s|ms|us|ns|j]\n");
  89         exit(-1);
  90 }
  91
  92
  93 static struct
  94 {
  95         int tb;
  96         int cloned;
  97         int flushed;
  98         char *flushb;
  99         int flushp;
 100         int flushe;
 101         int protocol, protocolmask;
 102         int scope, scopemask;
 103         int type, typemask;
 104         int tos, tosmask;
 105         int iif, iifmask;
 106         int oif, oifmask;
 107         int mark, markmask;
 108         int realm, realmmask;
 109         inet_prefix rprefsrc;
 110         inet_prefix rvia;
 111         inet_prefix rdst;
 112         inet_prefix mdst;
 113         inet_prefix rsrc;
 114         inet_prefix msrc;
 115 } filter;
 116
 117 static int flush_update(void)
 118 {
 119         if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
 120                 perror("Failed to send flush request");
 121                 return -1;
 122         }
 123         filter.flushp = 0;
 124         return 0;
 125 }
 126
 127 int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
 128 {
 129         struct rtmsg *r = NLMSG_DATA(n);
 130         inet_prefix dst;
 131         inet_prefix src;
 132         inet_prefix via;
 133         inet_prefix prefsrc;
 134         __u32 table;
 135         static int ip6_multiple_tables;
 136
 137         table = rtm_get_table(r, tb);
 138
 139         if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
 140                 ip6_multiple_tables = 1;
 141
 142         if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
 143                 return 0;
 144
 145         if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
 146                 if (filter.tb) {
 147                         if (filter.tb == RT_TABLE_LOCAL) {
 148                                 if (r->rtm_type != RTN_LOCAL)
 149                                         return 0;
 150                         } else if (filter.tb == RT_TABLE_MAIN) {
 151                                 if (r->rtm_type == RTN_LOCAL)
 152                                         return 0;
 153                         } else {
 154                                 return 0;
 155                         }
 156                 }
 157         } else {
 158                 if (filter.tb > 0 && filter.tb != table)
 159                         return 0;
 160         }
 161         if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
 162                 return 0;
 163         if ((filter.scope^r->rtm_scope)&filter.scopemask)
 164                 return 0;
 165         if ((filter.type^r->rtm_type)&filter.typemask)
 166                 return 0;
 167         if ((filter.tos^r->rtm_tos)&filter.tosmask)
 168                 return 0;
 169         if (filter.rdst.family &&
 170             (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
 171                 return 0;
 172         if (filter.mdst.family &&
 173             (r->rtm_family != filter.mdst.family ||
 174              (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
 175                 return 0;
 176         if (filter.rsrc.family &&
 177             (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
 178                 return 0;
 179         if (filter.msrc.family &&
 180             (r->rtm_family != filter.msrc.family ||
 181              (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
 182                 return 0;
 183         if (filter.rvia.family && r->rtm_family != filter.rvia.family)
 184                 return 0;
 185         if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
 186                 return 0;
 187
 188         memset(&dst, 0, sizeof(dst));
 189         dst.family = r->rtm_family;
 190         if (tb[RTA_DST])
 191                 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
 192         if (filter.rsrc.family || filter.msrc.family) {
 193                 memset(&src, 0, sizeof(src));
 194                 src.family = r->rtm_family;
 195                 if (tb[RTA_SRC])
 196                         memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
 197         }
 198         if (filter.rvia.bitlen>0) {
 199                 memset(&via, 0, sizeof(via));
 200                 via.family = r->rtm_family;
 201                 if (tb[RTA_GATEWAY])
 202                         memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
 203         }
 204         if (filter.rprefsrc.bitlen>0) {
 205                 memset(&prefsrc, 0, sizeof(prefsrc));
 206                 prefsrc.family = r->rtm_family;
 207                 if (tb[RTA_PREFSRC])
 208                         memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
 209         }
 210
 211         if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
 212                 return 0;
 213         if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
 214             inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
 215                 return 0;
 216
 217         if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
 218                 return 0;
 219         if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
 220             inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
 221                 return 0;
 222
 223         if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
 224                 return 0;
 225         if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
 226                 return 0;
 227         if (filter.realmmask) {
 228                 __u32 realms = 0;
 229                 if (tb[RTA_FLOW])
 230                         realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
 231                 if ((realms^filter.realm)&filter.realmmask)
 232                         return 0;
 233         }
 234         if (filter.iifmask) {
 235                 int iif = 0;
 236                 if (tb[RTA_IIF])
 237                         iif = *(int*)RTA_DATA(tb[RTA_IIF]);
 238                 if ((iif^filter.iif)&filter.iifmask)
 239                         return 0;
 240         }
 241         if (filter.oifmask) {
 242                 int oif = 0;
 243                 if (tb[RTA_OIF])
 244                         oif = *(int*)RTA_DATA(tb[RTA_OIF]);
 245                 if ((oif^filter.oif)&filter.oifmask)
 246                         return 0;
 247         }
 248         if (filter.markmask) {
 249                 int mark = 0;
 250                 if (tb[RTA_MARK])
 251                         mark = *(int *)RTA_DATA(tb[RTA_MARK]);
 252                 if ((mark ^ filter.mark) & filter.markmask)
 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         return 1;
 264 }
 265
 266 int calc_host_len(struct rtmsg *r)
 267 {
 268         if (r->rtm_family == AF_INET6)
 269                 return 128;
 270         else if (r->rtm_family == AF_INET)
 271                 return 32;
 272         else if (r->rtm_family == AF_DECnet)
 273                 return 16;
 274         else if (r->rtm_family == AF_IPX)
 275                 return 80;
 276         else
 277                 return -1;
 278 }
 279
 280 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 281 {
 282         FILE *fp = (FILE*)arg;
 283         struct rtmsg *r = NLMSG_DATA(n);
 284         int len = n->nlmsg_len;
 285         struct rtattr * tb[RTA_MAX+1];
 286         char abuf[256];
 287         int host_len = -1;
 288         __u32 table;
 289         SPRINT_BUF(b1);
 290         static int hz;
 291
 292         if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
 293                 fprintf(stderr, "Not a route: %08x %08x %08x\n",
 294                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 295                 return 0;
 296         }
 297         if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
 298                 return 0;
 299         len -= NLMSG_LENGTH(sizeof(*r));
 300         if (len < 0) {
 301                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 302                 return -1;
 303         }
 304
 305         host_len = calc_host_len(r);
 306
 307         parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
 308         table = rtm_get_table(r, tb);
 309
 310         if (!filter_nlmsg(n, tb, host_len))
 311                 return 0;
 312
 313         if (filter.flushb) {
 314                 struct nlmsghdr *fn;
 315                 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
 316                         if (flush_update())
 317                                 return -1;
 318                 }
 319                 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
 320                 memcpy(fn, n, n->nlmsg_len);
 321                 fn->nlmsg_type = RTM_DELROUTE;
 322                 fn->nlmsg_flags = NLM_F_REQUEST;
 323                 fn->nlmsg_seq = ++rth.seq;
 324                 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
 325                 filter.flushed++;
 326                 if (show_stats < 2)
 327                         return 0;
 328         }
 329
 330         if (n->nlmsg_type == RTM_DELROUTE)
 331                 fprintf(fp, "Deleted ");
 332         if (r->rtm_type != RTN_UNICAST && !filter.type)
 333                 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
 334
 335         if (tb[RTA_DST]) {
 336                 if (r->rtm_dst_len != host_len) {
 337                         fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
 338                                                          RTA_PAYLOAD(tb[RTA_DST]),
 339                                                          RTA_DATA(tb[RTA_DST]),
 340                                                          abuf, sizeof(abuf)),
 341                                 r->rtm_dst_len
 342                                 );
 343                 } else {
 344                         fprintf(fp, "%s ", format_host(r->rtm_family,
 345                                                        RTA_PAYLOAD(tb[RTA_DST]),
 346                                                        RTA_DATA(tb[RTA_DST]),
 347                                                        abuf, sizeof(abuf))
 348                                 );
 349                 }
 350         } else if (r->rtm_dst_len) {
 351                 fprintf(fp, "0/%d ", r->rtm_dst_len);
 352         } else {
 353                 fprintf(fp, "default ");
 354         }
 355         if (tb[RTA_SRC]) {
 356                 if (r->rtm_src_len != host_len) {
 357                         fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
 358                                                          RTA_PAYLOAD(tb[RTA_SRC]),
 359                                                          RTA_DATA(tb[RTA_SRC]),
 360                                                          abuf, sizeof(abuf)),
 361                                 r->rtm_src_len
 362                                 );
 363                 } else {
 364                         fprintf(fp, "from %s ", format_host(r->rtm_family,
 365                                                        RTA_PAYLOAD(tb[RTA_SRC]),
 366                                                        RTA_DATA(tb[RTA_SRC]),
 367                                                        abuf, sizeof(abuf))
 368                                 );
 369                 }
 370         } else if (r->rtm_src_len) {
 371                 fprintf(fp, "from 0/%u ", r->rtm_src_len);
 372         }
 373         if (r->rtm_tos && filter.tosmask != -1) {
 374                 SPRINT_BUF(b1);
 375                 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
 376         }
 377
 378         if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
 379                 fprintf(fp, "via %s ",
 380                         format_host(r->rtm_family,
 381                                     RTA_PAYLOAD(tb[RTA_GATEWAY]),
 382                                     RTA_DATA(tb[RTA_GATEWAY]),
 383                                     abuf, sizeof(abuf)));
 384         }
 385         if (tb[RTA_OIF] && filter.oifmask != -1)
 386                 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
 387
 388         if (!(r->rtm_flags&RTM_F_CLONED)) {
 389                 if (table != RT_TABLE_MAIN && !filter.tb)
 390                         fprintf(fp, " table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
 391                 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1)
 392                         fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
 393                 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1)
 394                         fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
 395         }
 396         if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
 397                 /* Do not use format_host(). It is our local addr
 398                    and symbolic name will not be useful.
 399                  */
 400                 fprintf(fp, " src %s ",
 401                         rt_addr_n2a(r->rtm_family,
 402                                     RTA_PAYLOAD(tb[RTA_PREFSRC]),
 403                                     RTA_DATA(tb[RTA_PREFSRC]),
 404                                     abuf, sizeof(abuf)));
 405         }
 406         if (tb[RTA_PRIORITY])
 407                 fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY]));
 408         if (r->rtm_flags & RTNH_F_DEAD)
 409                 fprintf(fp, "dead ");
 410         if (r->rtm_flags & RTNH_F_ONLINK)
 411                 fprintf(fp, "onlink ");
 412         if (r->rtm_flags & RTNH_F_PERVASIVE)
 413                 fprintf(fp, "pervasive ");
 414         if (r->rtm_flags & RTM_F_NOTIFY)
 415                 fprintf(fp, "notify ");
 416         if (tb[RTA_MARK]) {
 417                 unsigned int mark = *(unsigned int*)RTA_DATA(tb[RTA_MARK]);
 418                 if (mark) {
 419                         if (mark >= 16)
 420                                 fprintf(fp, " mark 0x%x", mark);
 421                         else
 422                                 fprintf(fp, " mark %u", mark);
 423                 }
 424         }
 425
 426         if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
 427                 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
 428                 __u32 from = to>>16;
 429                 to &= 0xFFFF;
 430                 fprintf(fp, "realm%s ", from ? "s" : "");
 431                 if (from) {
 432                         fprintf(fp, "%s/",
 433                                 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
 434                 }
 435                 fprintf(fp, "%s ",
 436                         rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
 437         }
 438         if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
 439                 __u32 flags = r->rtm_flags&~0xFFFF;
 440                 int first = 1;
 441
 442                 fprintf(fp, "%s    cache ", _SL_);
 443
 444 #define PRTFL(fl,flname) if (flags&RTCF_##fl) { \
 445   flags &= ~RTCF_##fl; \
 446   fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
 447   first = 0; }
 448                 PRTFL(LOCAL, "local");
 449                 PRTFL(REJECT, "reject");
 450                 PRTFL(MULTICAST, "mc");
 451                 PRTFL(BROADCAST, "brd");
 452                 PRTFL(DNAT, "dst-nat");
 453                 PRTFL(SNAT, "src-nat");
 454                 PRTFL(MASQ, "masq");
 455                 PRTFL(DIRECTDST, "dst-direct");
 456                 PRTFL(DIRECTSRC, "src-direct");
 457                 PRTFL(REDIRECTED, "redirected");
 458                 PRTFL(DOREDIRECT, "redirect");
 459                 PRTFL(FAST, "fastroute");
 460                 PRTFL(NOTIFY, "notify");
 461                 PRTFL(TPROXY, "proxy");
 462
 463                 if (flags)
 464                         fprintf(fp, "%s%x> ", first ? "<" : "", flags);
 465                 if (tb[RTA_CACHEINFO]) {
 466                         struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
 467                         if (!hz)
 468                                 hz = get_user_hz();
 469                         if (ci->rta_expires != 0)
 470                                 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
 471                         if (ci->rta_error != 0)
 472                                 fprintf(fp, " error %d", ci->rta_error);
 473                         if (show_stats) {
 474                                 if (ci->rta_clntref)
 475                                         fprintf(fp, " users %d", ci->rta_clntref);
 476                                 if (ci->rta_used != 0)
 477                                         fprintf(fp, " used %d", ci->rta_used);
 478                                 if (ci->rta_lastuse != 0)
 479                                         fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
 480                         }
 481 #ifdef RTNETLINK_HAVE_PEERINFO
 482                         if (ci->rta_id)
 483                                 fprintf(fp, " ipid 0x%04x", ci->rta_id);
 484                         if (ci->rta_ts || ci->rta_tsage)
 485                                 fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage);
 486 #endif
 487                 }
 488         } else if (r->rtm_family == AF_INET6) {
 489                 struct rta_cacheinfo *ci = NULL;
 490                 if (tb[RTA_CACHEINFO])
 491                         ci = RTA_DATA(tb[RTA_CACHEINFO]);
 492                 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
 493                         if (!hz)
 494                                 hz = get_user_hz();
 495                         if (r->rtm_flags & RTM_F_CLONED)
 496                                 fprintf(fp, "%s    cache ", _SL_);
 497                         if (ci->rta_expires)
 498                                 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
 499                         if (ci->rta_error != 0)
 500                                 fprintf(fp, " error %d", ci->rta_error);
 501                         if (show_stats) {
 502                                 if (ci->rta_clntref)
 503                                         fprintf(fp, " users %d", ci->rta_clntref);
 504                                 if (ci->rta_used != 0)
 505                                         fprintf(fp, " used %d", ci->rta_used);
 506                                 if (ci->rta_lastuse != 0)
 507                                         fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
 508                         }
 509                 } else if (ci) {
 510                         if (ci->rta_error != 0)
 511                                 fprintf(fp, " error %d", ci->rta_error);
 512                 }
 513         }
 514         if (tb[RTA_METRICS]) {
 515                 int i;
 516                 unsigned mxlock = 0;
 517                 struct rtattr *mxrta[RTAX_MAX+1];
 518
 519                 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
 520                             RTA_PAYLOAD(tb[RTA_METRICS]));
 521                 if (mxrta[RTAX_LOCK])
 522                         mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]);
 523
 524                 for (i=2; i<= RTAX_MAX; i++) {
 525                         unsigned val;
 526
 527                         if (mxrta[i] == NULL)
 528                                 continue;
 529                         if (!hz)
 530                                 hz = get_user_hz();
 531
 532                         if (i < sizeof(mx_names)/sizeof(char*) && mx_names[i])
 533                                 fprintf(fp, " %s", mx_names[i]);
 534                         else
 535                                 fprintf(fp, " metric %d", i);
 536                         if (mxlock & (1<<i))
 537                                 fprintf(fp, " lock");
 538
 539                         val = *(unsigned*)RTA_DATA(mxrta[i]);
 540                         switch (i) {
 541                         case RTAX_HOPLIMIT:
 542                                 if ((int)val == -1)
 543                                         val = 0;
 544                                 /* fall through */
 545                         default:
 546                                 fprintf(fp, " %u", val);
 547                                 break;
 548
 549                         case RTAX_RTT:
 550                         case RTAX_RTTVAR:
 551                         case RTAX_RTO_MIN:
 552                                 val *= 1000;
 553                                 if (i == RTAX_RTT)
 554                                         val /= 8;
 555                                 else if (i == RTAX_RTTVAR)
 556                                         val /= 4;
 557
 558                                 if (val >= hz)
 559                                         fprintf(fp, " %llums",
 560                                                 (unsigned long long) val / hz);
 561                                 else
 562                                         fprintf(fp, " %.2fms",
 563                                                 (double)val / hz);
 564                         }
 565                 }
 566         }
 567         if (tb[RTA_IIF] && filter.iifmask != -1) {
 568                 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
 569         }
 570         if (tb[RTA_MULTIPATH]) {
 571                 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
 572                 int first = 0;
 573
 574                 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
 575
 576                 for (;;) {
 577                         if (len < sizeof(*nh))
 578                                 break;
 579                         if (nh->rtnh_len > len)
 580                                 break;
 581                         if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
 582                                 if (first)
 583                                         fprintf(fp, " Oifs:");
 584                                 else
 585                                         fprintf(fp, " ");
 586                         } else
 587                                 fprintf(fp, "%s\tnexthop", _SL_);
 588                         if (nh->rtnh_len > sizeof(*nh)) {
 589                                 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
 590                                 if (tb[RTA_GATEWAY]) {
 591                                         fprintf(fp, " via %s ",
 592                                                 format_host(r->rtm_family,
 593                                                             RTA_PAYLOAD(tb[RTA_GATEWAY]),
 594                                                             RTA_DATA(tb[RTA_GATEWAY]),
 595                                                             abuf, sizeof(abuf)));
 596                                 }
 597                                 if (tb[RTA_FLOW]) {
 598                                         __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
 599                                         __u32 from = to>>16;
 600                                         to &= 0xFFFF;
 601                                         fprintf(fp, " realm%s ", from ? "s" : "");
 602                                         if (from) {
 603                                                 fprintf(fp, "%s/",
 604                                                         rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
 605                                         }
 606                                         fprintf(fp, "%s",
 607                                                 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
 608                                 }
 609                         }
 610                         if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
 611                                 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex));
 612                                 if (nh->rtnh_hops != 1)
 613                                         fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
 614                         } else {
 615                                 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
 616                                 fprintf(fp, " weight %d", nh->rtnh_hops+1);
 617                         }
 618                         if (nh->rtnh_flags & RTNH_F_DEAD)
 619                                 fprintf(fp, " dead");
 620                         if (nh->rtnh_flags & RTNH_F_ONLINK)
 621                                 fprintf(fp, " onlink");
 622                         if (nh->rtnh_flags & RTNH_F_PERVASIVE)
 623                                 fprintf(fp, " pervasive");
 624                         len -= NLMSG_ALIGN(nh->rtnh_len);
 625                         nh = RTNH_NEXT(nh);
 626                 }
 627         }
 628         fprintf(fp, "\n");
 629         fflush(fp);
 630         return 0;
 631 }
 632
 633
 634 int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp)
 635 {
 636         int argc = *argcp;
 637         char **argv = *argvp;
 638
 639         while (++argv, --argc > 0) {
 640                 if (strcmp(*argv, "via") == 0) {
 641                         NEXT_ARG();
 642                         rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv));
 643                         rtnh->rtnh_len += sizeof(struct rtattr) + 4;
 644                 } else if (strcmp(*argv, "dev") == 0) {
 645                         NEXT_ARG();
 646                         if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
 647                                 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
 648                                 exit(1);
 649                         }
 650                 } else if (strcmp(*argv, "weight") == 0) {
 651                         unsigned w;
 652                         NEXT_ARG();
 653                         if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
 654                                 invarg("\"weight\" is invalid\n", *argv);
 655                         rtnh->rtnh_hops = w - 1;
 656                 } else if (strcmp(*argv, "onlink") == 0) {
 657                         rtnh->rtnh_flags |= RTNH_F_ONLINK;
 658                 } else if (matches(*argv, "realms") == 0) {
 659                         __u32 realm;
 660                         NEXT_ARG();
 661                         if (get_rt_realms(&realm, *argv))
 662                                 invarg("\"realm\" value is invalid\n", *argv);
 663                         rta_addattr32(rta, 4096, RTA_FLOW, realm);
 664                         rtnh->rtnh_len += sizeof(struct rtattr) + 4;
 665                 } else
 666                         break;
 667         }
 668         *argcp = argc;
 669         *argvp = argv;
 670         return 0;
 671 }
 672
 673 int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
 674 {
 675         char buf[1024];
 676         struct rtattr *rta = (void*)buf;
 677         struct rtnexthop *rtnh;
 678
 679         rta->rta_type = RTA_MULTIPATH;
 680         rta->rta_len = RTA_LENGTH(0);
 681         rtnh = RTA_DATA(rta);
 682
 683         while (argc > 0) {
 684                 if (strcmp(*argv, "nexthop") != 0) {
 685                         fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
 686                         exit(-1);
 687                 }
 688                 if (argc <= 1) {
 689                         fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
 690                         exit(-1);
 691                 }
 692                 memset(rtnh, 0, sizeof(*rtnh));
 693                 rtnh->rtnh_len = sizeof(*rtnh);
 694                 rta->rta_len += rtnh->rtnh_len;
 695                 parse_one_nh(rta, rtnh, &argc, &argv);
 696                 rtnh = RTNH_NEXT(rtnh);
 697         }
 698
 699         if (rta->rta_len > RTA_LENGTH(0))
 700                 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
 701         return 0;
 702 }
 703
 704
 705 int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
 706 {
 707         struct {
 708                 struct nlmsghdr         n;
 709                 struct rtmsg            r;
 710                 char                    buf[1024];
 711         } req;
 712         char  mxbuf[256];
 713         struct rtattr * mxrta = (void*)mxbuf;
 714         unsigned mxlock = 0;
 715         char  *d = NULL;
 716         int gw_ok = 0;
 717         int dst_ok = 0;
 718         int nhs_ok = 0;
 719         int scope_ok = 0;
 720         int table_ok = 0;
 721         int proto_ok = 0;
 722         int type_ok = 0;
 723         int raw = 0;
 724
 725         memset(&req, 0, sizeof(req));
 726
 727         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
 728         req.n.nlmsg_flags = NLM_F_REQUEST|flags;
 729         req.n.nlmsg_type = cmd;
 730         req.r.rtm_family = preferred_family;
 731         req.r.rtm_table = RT_TABLE_MAIN;
 732         req.r.rtm_scope = RT_SCOPE_NOWHERE;
 733
 734         if (cmd != RTM_DELROUTE) {
 735                 req.r.rtm_protocol = RTPROT_BOOT;
 736                 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
 737                 req.r.rtm_type = RTN_UNICAST;
 738         }
 739
 740         mxrta->rta_type = RTA_METRICS;
 741         mxrta->rta_len = RTA_LENGTH(0);
 742
 743         while (argc > 0) {
 744                 if (strcmp(*argv, "src") == 0) {
 745                         inet_prefix addr;
 746                         NEXT_ARG();
 747                         get_addr(&addr, *argv, req.r.rtm_family);
 748                         if (req.r.rtm_family == AF_UNSPEC)
 749                                 req.r.rtm_family = addr.family;
 750                         addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
 751                 } else if (strcmp(*argv, "via") == 0) {
 752                         inet_prefix addr;
 753                         gw_ok = 1;
 754                         NEXT_ARG();
 755                         get_addr(&addr, *argv, req.r.rtm_family);
 756                         if (req.r.rtm_family == AF_UNSPEC)
 757                                 req.r.rtm_family = addr.family;
 758                         addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
 759                 } else if (strcmp(*argv, "from") == 0) {
 760                         inet_prefix addr;
 761                         NEXT_ARG();
 762                         get_prefix(&addr, *argv, req.r.rtm_family);
 763                         if (req.r.rtm_family == AF_UNSPEC)
 764                                 req.r.rtm_family = addr.family;
 765                         if (addr.bytelen)
 766                                 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
 767                         req.r.rtm_src_len = addr.bitlen;
 768                 } else if (strcmp(*argv, "tos") == 0 ||
 769                            matches(*argv, "dsfield") == 0) {
 770                         __u32 tos;
 771                         NEXT_ARG();
 772                         if (rtnl_dsfield_a2n(&tos, *argv))
 773                                 invarg("\"tos\" value is invalid\n", *argv);
 774                         req.r.rtm_tos = tos;
 775                 } else if (matches(*argv, "metric") == 0 ||
 776                            matches(*argv, "priority") == 0 ||
 777                            matches(*argv, "preference") == 0) {
 778                         __u32 metric;
 779                         NEXT_ARG();
 780                         if (get_u32(&metric, *argv, 0))
 781                                 invarg("\"metric\" value is invalid\n", *argv);
 782                         addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
 783                 } else if (strcmp(*argv, "scope") == 0) {
 784                         __u32 scope = 0;
 785                         NEXT_ARG();
 786                         if (rtnl_rtscope_a2n(&scope, *argv))
 787                                 invarg("invalid \"scope\" value\n", *argv);
 788                         req.r.rtm_scope = scope;
 789                         scope_ok = 1;
 790                 } else if (strcmp(*argv, "mtu") == 0) {
 791                         unsigned mtu;
 792                         NEXT_ARG();
 793                         if (strcmp(*argv, "lock") == 0) {
 794                                 mxlock |= (1<<RTAX_MTU);
 795                                 NEXT_ARG();
 796                         }
 797                         if (get_unsigned(&mtu, *argv, 0))
 798                                 invarg("\"mtu\" value is invalid\n", *argv);
 799                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
 800 #ifdef RTAX_HOPLIMIT
 801                 } else if (strcmp(*argv, "hoplimit") == 0) {
 802                         unsigned hoplimit;
 803                         NEXT_ARG();
 804                         if (strcmp(*argv, "lock") == 0) {
 805                                 mxlock |= (1<<RTAX_HOPLIMIT);
 806                                 NEXT_ARG();
 807                         }
 808                         if (get_unsigned(&hoplimit, *argv, 0))
 809                                 invarg("\"hoplimit\" value is invalid\n", *argv);
 810                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
 811 #endif
 812 #ifdef RTAX_ADVMSS
 813                 } else if (strcmp(*argv, "advmss") == 0) {
 814                         unsigned mss;
 815                         NEXT_ARG();
 816                         if (strcmp(*argv, "lock") == 0) {
 817                                 mxlock |= (1<<RTAX_ADVMSS);
 818                                 NEXT_ARG();
 819                         }
 820                         if (get_unsigned(&mss, *argv, 0))
 821                                 invarg("\"mss\" value is invalid\n", *argv);
 822                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
 823 #endif
 824 #ifdef RTAX_REORDERING
 825                 } else if (matches(*argv, "reordering") == 0) {
 826                         unsigned reord;
 827                         NEXT_ARG();
 828                         if (strcmp(*argv, "lock") == 0) {
 829                                 mxlock |= (1<<RTAX_REORDERING);
 830                                 NEXT_ARG();
 831                         }
 832                         if (get_unsigned(&reord, *argv, 0))
 833                                 invarg("\"reordering\" value is invalid\n", *argv);
 834                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
 835 #endif
 836                 } else if (strcmp(*argv, "rtt") == 0) {
 837                         unsigned rtt;
 838                         NEXT_ARG();
 839                         if (strcmp(*argv, "lock") == 0) {
 840                                 mxlock |= (1<<RTAX_RTT);
 841                                 NEXT_ARG();
 842                         }
 843                         if (get_jiffies(&rtt, *argv, &raw))
 844                                 invarg("\"rtt\" value is invalid\n", *argv);
 845                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
 846                                 (raw) ? rtt : rtt * 8);
 847                 } else if (strcmp(*argv, "rto_min") == 0) {
 848                         unsigned rto_min;
 849                         NEXT_ARG();
 850                         mxlock |= (1<<RTAX_RTO_MIN);
 851                         if (get_jiffies(&rto_min, *argv, &raw))
 852                                 invarg("\"rto_min\" value is invalid\n",
 853                                        *argv);
 854                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
 855                                       rto_min);
 856                 } else if (matches(*argv, "window") == 0) {
 857                         unsigned win;
 858                         NEXT_ARG();
 859                         if (strcmp(*argv, "lock") == 0) {
 860                                 mxlock |= (1<<RTAX_WINDOW);
 861                                 NEXT_ARG();
 862                         }
 863                         if (get_unsigned(&win, *argv, 0))
 864                                 invarg("\"window\" value is invalid\n", *argv);
 865                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
 866                 } else if (matches(*argv, "cwnd") == 0) {
 867                         unsigned win;
 868                         NEXT_ARG();
 869                         if (strcmp(*argv, "lock") == 0) {
 870                                 mxlock |= (1<<RTAX_CWND);
 871                                 NEXT_ARG();
 872                         }
 873                         if (get_unsigned(&win, *argv, 0))
 874                                 invarg("\"cwnd\" value is invalid\n", *argv);
 875                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
 876                 } else if (matches(*argv, "initcwnd") == 0) {
 877                         unsigned win;
 878                         NEXT_ARG();
 879                         if (strcmp(*argv, "lock") == 0) {
 880                                 mxlock |= (1<<RTAX_INITCWND);
 881                                 NEXT_ARG();
 882                         }
 883                         if (get_unsigned(&win, *argv, 0))
 884                                 invarg("\"initcwnd\" value is invalid\n", *argv);
 885                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
 886                 } else if (matches(*argv, "initrwnd") == 0) {
 887                         unsigned win;
 888                         NEXT_ARG();
 889                         if (strcmp(*argv, "lock") == 0) {
 890                                 mxlock |= (1<<RTAX_INITRWND);
 891                                 NEXT_ARG();
 892                         }
 893                         if (get_unsigned(&win, *argv, 0))
 894                                 invarg("\"initrwnd\" value is invalid\n", *argv);
 895                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
 896                 } else if (matches(*argv, "rttvar") == 0) {
 897                         unsigned win;
 898                         NEXT_ARG();
 899                         if (strcmp(*argv, "lock") == 0) {
 900                                 mxlock |= (1<<RTAX_RTTVAR);
 901                                 NEXT_ARG();
 902                         }
 903                         if (get_jiffies(&win, *argv, &raw))
 904                                 invarg("\"rttvar\" value is invalid\n", *argv);
 905                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
 906                                 (raw) ? win : win * 4);
 907                 } else if (matches(*argv, "ssthresh") == 0) {
 908                         unsigned win;
 909                         NEXT_ARG();
 910                         if (strcmp(*argv, "lock") == 0) {
 911                                 mxlock |= (1<<RTAX_SSTHRESH);
 912                                 NEXT_ARG();
 913                         }
 914                         if (get_unsigned(&win, *argv, 0))
 915                                 invarg("\"ssthresh\" value is invalid\n", *argv);
 916                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
 917                 } else if (matches(*argv, "realms") == 0) {
 918                         __u32 realm;
 919                         NEXT_ARG();
 920                         if (get_rt_realms(&realm, *argv))
 921                                 invarg("\"realm\" value is invalid\n", *argv);
 922                         addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
 923                 } else if (strcmp(*argv, "onlink") == 0) {
 924                         req.r.rtm_flags |= RTNH_F_ONLINK;
 925                 } else if (strcmp(*argv, "nexthop") == 0) {
 926                         nhs_ok = 1;
 927                         break;
 928                 } else if (matches(*argv, "protocol") == 0) {
 929                         __u32 prot;
 930                         NEXT_ARG();
 931                         if (rtnl_rtprot_a2n(&prot, *argv))
 932                                 invarg("\"protocol\" value is invalid\n", *argv);
 933                         req.r.rtm_protocol = prot;
 934                         proto_ok =1;
 935                 } else if (matches(*argv, "table") == 0) {
 936                         __u32 tid;
 937                         NEXT_ARG();
 938                         if (rtnl_rttable_a2n(&tid, *argv))
 939                                 invarg("\"table\" value is invalid\n", *argv);
 940                         if (tid < 256)
 941                                 req.r.rtm_table = tid;
 942                         else {
 943                                 req.r.rtm_table = RT_TABLE_UNSPEC;
 944                                 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
 945                         }
 946                         table_ok = 1;
 947                 } else if (strcmp(*argv, "dev") == 0 ||
 948                            strcmp(*argv, "oif") == 0) {
 949                         NEXT_ARG();
 950                         d = *argv;
 951                 } else {
 952                         int type;
 953                         inet_prefix dst;
 954
 955                         if (strcmp(*argv, "to") == 0) {
 956                                 NEXT_ARG();
 957                         }
 958                         if ((**argv < '0' || **argv > '9') &&
 959                             rtnl_rtntype_a2n(&type, *argv) == 0) {
 960                                 NEXT_ARG();
 961                                 req.r.rtm_type = type;
 962                                 type_ok = 1;
 963                         }
 964
 965                         if (matches(*argv, "help") == 0)
 966                                 usage();
 967                         if (dst_ok)
 968                                 duparg2("to", *argv);
 969                         get_prefix(&dst, *argv, req.r.rtm_family);
 970                         if (req.r.rtm_family == AF_UNSPEC)
 971                                 req.r.rtm_family = dst.family;
 972                         req.r.rtm_dst_len = dst.bitlen;
 973                         dst_ok = 1;
 974                         if (dst.bytelen)
 975                                 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
 976                 }
 977                 argc--; argv++;
 978         }
 979
 980         if (d || nhs_ok)  {
 981                 int idx;
 982
 983                 ll_init_map(&rth);
 984
 985                 if (d) {
 986                         if ((idx = ll_name_to_index(d)) == 0) {
 987                                 fprintf(stderr, "Cannot find device \"%s\"\n", d);
 988                                 return -1;
 989                         }
 990                         addattr32(&req.n, sizeof(req), RTA_OIF, idx);
 991                 }
 992         }
 993
 994         if (mxrta->rta_len > RTA_LENGTH(0)) {
 995                 if (mxlock)
 996                         rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
 997                 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
 998         }
 999
1000         if (nhs_ok)
1001                 parse_nexthops(&req.n, &req.r, argc, argv);
1002
1003         if (!table_ok) {
1004                 if (req.r.rtm_type == RTN_LOCAL ||
1005                     req.r.rtm_type == RTN_BROADCAST ||
1006                     req.r.rtm_type == RTN_NAT ||
1007                     req.r.rtm_type == RTN_ANYCAST)
1008                         req.r.rtm_table = RT_TABLE_LOCAL;
1009         }
1010         if (!scope_ok) {
1011                 if (req.r.rtm_type == RTN_LOCAL ||
1012                     req.r.rtm_type == RTN_NAT)
1013                         req.r.rtm_scope = RT_SCOPE_HOST;
1014                 else if (req.r.rtm_type == RTN_BROADCAST ||
1015                          req.r.rtm_type == RTN_MULTICAST ||
1016                          req.r.rtm_type == RTN_ANYCAST)
1017                         req.r.rtm_scope = RT_SCOPE_LINK;
1018                 else if (req.r.rtm_type == RTN_UNICAST ||
1019                          req.r.rtm_type == RTN_UNSPEC) {
1020                         if (cmd == RTM_DELROUTE)
1021                                 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1022                         else if (!gw_ok && !nhs_ok)
1023                                 req.r.rtm_scope = RT_SCOPE_LINK;
1024                 }
1025         }
1026
1027         if (req.r.rtm_family == AF_UNSPEC)
1028                 req.r.rtm_family = AF_INET;
1029
1030         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
1031                 exit(2);
1032
1033         return 0;
1034 }
1035
1036 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1037 {
1038         struct {
1039                 struct nlmsghdr nlh;
1040                 struct rtmsg rtm;
1041         } req;
1042         struct sockaddr_nl nladdr;
1043
1044         memset(&nladdr, 0, sizeof(nladdr));
1045         memset(&req, 0, sizeof(req));
1046         nladdr.nl_family = AF_NETLINK;
1047
1048         req.nlh.nlmsg_len = sizeof(req);
1049         req.nlh.nlmsg_type = RTM_GETROUTE;
1050         req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
1051         req.nlh.nlmsg_pid = 0;
1052         req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
1053         req.rtm.rtm_family = family;
1054         req.rtm.rtm_flags |= RTM_F_CLONED;
1055
1056         return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
1057 }
1058
1059 static int iproute_flush_cache(void)
1060 {
1061 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1062
1063         int len;
1064         int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
1065         char *buffer = "-1";
1066
1067         if (flush_fd < 0) {
1068                 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
1069                 return -1;
1070         }
1071
1072         len = strlen (buffer);
1073
1074         if ((write (flush_fd, (void *)buffer, len)) < len) {
1075                 fprintf (stderr, "Cannot flush routing cache\n");
1076                 return -1;
1077         }
1078         close(flush_fd);
1079         return 0;
1080 }
1081
1082 int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
1083 {
1084         int ret;
1085         int len = n->nlmsg_len;
1086         struct rtmsg *r = NLMSG_DATA(n);
1087         struct rtattr *tb[RTA_MAX+1];
1088         int host_len = -1;
1089
1090         if (isatty(STDOUT_FILENO)) {
1091                 fprintf(stderr, "Not sending binary stream to stdout\n");
1092                 return -1;
1093         }
1094
1095         host_len = calc_host_len(r);
1096         len -= NLMSG_LENGTH(sizeof(*r));
1097         parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1098
1099         if (!filter_nlmsg(n, tb, host_len))
1100                 return 0;
1101
1102         ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1103         if ((ret > 0) && (ret != n->nlmsg_len)) {
1104                 fprintf(stderr, "Short write while saving nlmsg\n");
1105                 ret = -EIO;
1106         }
1107
1108         return ret == n->nlmsg_len ? 0 : ret;
1109 }
1110
1111 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1112 {
1113         int do_ipv6 = preferred_family;
1114         char *id = NULL;
1115         char *od = NULL;
1116         unsigned int mark = 0;
1117         rtnl_filter_t filter_fn;
1118
1119         if (action == IPROUTE_SAVE)
1120                 filter_fn = save_route;
1121         else
1122                 filter_fn = print_route;
1123
1124         iproute_reset_filter();
1125         filter.tb = RT_TABLE_MAIN;
1126
1127         if ((action == IPROUTE_FLUSH) && argc <= 0) {
1128                 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1129                 return -1;
1130         }
1131
1132         while (argc > 0) {
1133                 if (matches(*argv, "table") == 0) {
1134                         __u32 tid;
1135                         NEXT_ARG();
1136                         if (rtnl_rttable_a2n(&tid, *argv)) {
1137                                 if (strcmp(*argv, "all") == 0) {
1138                                         filter.tb = 0;
1139                                 } else if (strcmp(*argv, "cache") == 0) {
1140                                         filter.cloned = 1;
1141                                 } else if (strcmp(*argv, "help") == 0) {
1142                                         usage();
1143                                 } else {
1144                                         invarg("table id value is invalid\n", *argv);
1145                                 }
1146                         } else
1147                                 filter.tb = tid;
1148                 } else if (matches(*argv, "cached") == 0 ||
1149                            matches(*argv, "cloned") == 0) {
1150                         filter.cloned = 1;
1151                 } else if (strcmp(*argv, "tos") == 0 ||
1152                            matches(*argv, "dsfield") == 0) {
1153                         __u32 tos;
1154                         NEXT_ARG();
1155                         if (rtnl_dsfield_a2n(&tos, *argv))
1156                                 invarg("TOS value is invalid\n", *argv);
1157                         filter.tos = tos;
1158                         filter.tosmask = -1;
1159                 } else if (matches(*argv, "protocol") == 0) {
1160                         __u32 prot = 0;
1161                         NEXT_ARG();
1162                         filter.protocolmask = -1;
1163                         if (rtnl_rtprot_a2n(&prot, *argv)) {
1164                                 if (strcmp(*argv, "all") != 0)
1165                                         invarg("invalid \"protocol\"\n", *argv);
1166                                 prot = 0;
1167                                 filter.protocolmask = 0;
1168                         }
1169                         filter.protocol = prot;
1170                 } else if (matches(*argv, "scope") == 0) {
1171                         __u32 scope = 0;
1172                         NEXT_ARG();
1173                         filter.scopemask = -1;
1174                         if (rtnl_rtscope_a2n(&scope, *argv)) {
1175                                 if (strcmp(*argv, "all") != 0)
1176                                         invarg("invalid \"scope\"\n", *argv);
1177                                 scope = RT_SCOPE_NOWHERE;
1178                                 filter.scopemask = 0;
1179                         }
1180                         filter.scope = scope;
1181                 } else if (matches(*argv, "type") == 0) {
1182                         int type;
1183                         NEXT_ARG();
1184                         filter.typemask = -1;
1185                         if (rtnl_rtntype_a2n(&type, *argv))
1186                                 invarg("node type value is invalid\n", *argv);
1187                         filter.type = type;
1188                 } else if (strcmp(*argv, "dev") == 0 ||
1189                            strcmp(*argv, "oif") == 0) {
1190                         NEXT_ARG();
1191                         od = *argv;
1192                 } else if (strcmp(*argv, "iif") == 0) {
1193                         NEXT_ARG();
1194                         id = *argv;
1195                 } else if (strcmp(*argv, "mark") == 0) {
1196                         NEXT_ARG();
1197                         get_unsigned(&mark, *argv, 0);
1198                         filter.markmask = -1;
1199                 } else if (strcmp(*argv, "via") == 0) {
1200                         NEXT_ARG();
1201                         get_prefix(&filter.rvia, *argv, do_ipv6);
1202                 } else if (strcmp(*argv, "src") == 0) {
1203                         NEXT_ARG();
1204                         get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1205                 } else if (matches(*argv, "realms") == 0) {
1206                         __u32 realm;
1207                         NEXT_ARG();
1208                         if (get_rt_realms(&realm, *argv))
1209                                 invarg("invalid realms\n", *argv);
1210                         filter.realm = realm;
1211                         filter.realmmask = ~0U;
1212                         if ((filter.realm&0xFFFF) == 0 &&
1213                             (*argv)[strlen(*argv) - 1] == '/')
1214                                 filter.realmmask &= ~0xFFFF;
1215                         if ((filter.realm&0xFFFF0000U) == 0 &&
1216                             (strchr(*argv, '/') == NULL ||
1217                              (*argv)[0] == '/'))
1218                                 filter.realmmask &= ~0xFFFF0000U;
1219                 } else if (matches(*argv, "from") == 0) {
1220                         NEXT_ARG();
1221                         if (matches(*argv, "root") == 0) {
1222                                 NEXT_ARG();
1223                                 get_prefix(&filter.rsrc, *argv, do_ipv6);
1224                         } else if (matches(*argv, "match") == 0) {
1225                                 NEXT_ARG();
1226                                 get_prefix(&filter.msrc, *argv, do_ipv6);
1227                         } else {
1228                                 if (matches(*argv, "exact") == 0) {
1229                                         NEXT_ARG();
1230                                 }
1231                                 get_prefix(&filter.msrc, *argv, do_ipv6);
1232                                 filter.rsrc = filter.msrc;
1233                         }
1234                 } else {
1235                         if (matches(*argv, "to") == 0) {
1236                                 NEXT_ARG();
1237                         }
1238                         if (matches(*argv, "root") == 0) {
1239                                 NEXT_ARG();
1240                                 get_prefix(&filter.rdst, *argv, do_ipv6);
1241                         } else if (matches(*argv, "match") == 0) {
1242                                 NEXT_ARG();
1243                                 get_prefix(&filter.mdst, *argv, do_ipv6);
1244                         } else {
1245                                 if (matches(*argv, "exact") == 0) {
1246                                         NEXT_ARG();
1247                                 }
1248                                 get_prefix(&filter.mdst, *argv, do_ipv6);
1249                                 filter.rdst = filter.mdst;
1250                         }
1251                 }
1252                 argc--; argv++;
1253         }
1254
1255         if (do_ipv6 == AF_UNSPEC && filter.tb)
1256                 do_ipv6 = AF_INET;
1257
1258         ll_init_map(&rth);
1259
1260         if (id || od)  {
1261                 int idx;
1262
1263                 if (id) {
1264                         if ((idx = ll_name_to_index(id)) == 0) {
1265                                 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1266                                 return -1;
1267                         }
1268                         filter.iif = idx;
1269                         filter.iifmask = -1;
1270                 }
1271                 if (od) {
1272                         if ((idx = ll_name_to_index(od)) == 0) {
1273                                 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1274                                 return -1;
1275                         }
1276                         filter.oif = idx;
1277                         filter.oifmask = -1;
1278                 }
1279         }
1280         filter.mark = mark;
1281
1282         if (action == IPROUTE_FLUSH) {
1283                 int round = 0;
1284                 char flushb[4096-512];
1285                 time_t start = time(0);
1286
1287                 if (filter.cloned) {
1288                         if (do_ipv6 != AF_INET6) {
1289                                 iproute_flush_cache();
1290                                 if (show_stats)
1291                                         printf("*** IPv4 routing cache is flushed.\n");
1292                         }
1293                         if (do_ipv6 == AF_INET)
1294                                 return 0;
1295                 }
1296
1297                 filter.flushb = flushb;
1298                 filter.flushp = 0;
1299                 filter.flushe = sizeof(flushb);
1300
1301                 for (;;) {
1302                         if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1303                                 perror("Cannot send dump request");
1304                                 exit(1);
1305                         }
1306                         filter.flushed = 0;
1307                         if (rtnl_dump_filter(&rth, filter_fn, stdout, NULL, NULL) < 0) {
1308                                 fprintf(stderr, "Flush terminated\n");
1309                                 exit(1);
1310                         }
1311                         if (filter.flushed == 0) {
1312                                 if (show_stats) {
1313                                         if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1314                                                 printf("Nothing to flush.\n");
1315                                         else
1316                                                 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
1317                                 }
1318                                 fflush(stdout);
1319                                 return 0;
1320                         }
1321                         round++;
1322                         if (flush_update() < 0)
1323                                 exit(1);
1324
1325                         if (time(0) - start > 30) {
1326                                 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1327                                        time(0) - start, filter.flushed);
1328                                 exit(1);
1329                         }
1330
1331                         if (show_stats) {
1332                                 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1333                                 fflush(stdout);
1334                         }
1335                 }
1336         }
1337
1338         if (!filter.cloned) {
1339                 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1340                         perror("Cannot send dump request");
1341                         exit(1);
1342                 }
1343         } else {
1344                 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1345                         perror("Cannot send dump request");
1346                         exit(1);
1347                 }
1348         }
1349
1350         if (rtnl_dump_filter(&rth, filter_fn, stdout, NULL, NULL) < 0) {
1351                 fprintf(stderr, "Dump terminated\n");
1352                 exit(1);
1353         }
1354
1355         exit(0);
1356 }
1357
1358
1359 int iproute_get(int argc, char **argv)
1360 {
1361         struct {
1362                 struct nlmsghdr         n;
1363                 struct rtmsg            r;
1364                 char                    buf[1024];
1365         } req;
1366         char  *idev = NULL;
1367         char  *odev = NULL;
1368         int connected = 0;
1369         int from_ok = 0;
1370         unsigned int mark = 0;
1371
1372         memset(&req, 0, sizeof(req));
1373
1374         iproute_reset_filter();
1375         filter.cloned = 2;
1376
1377         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1378         req.n.nlmsg_flags = NLM_F_REQUEST;
1379         req.n.nlmsg_type = RTM_GETROUTE;
1380         req.r.rtm_family = preferred_family;
1381         req.r.rtm_table = 0;
1382         req.r.rtm_protocol = 0;
1383         req.r.rtm_scope = 0;
1384         req.r.rtm_type = 0;
1385         req.r.rtm_src_len = 0;
1386         req.r.rtm_dst_len = 0;
1387         req.r.rtm_tos = 0;
1388
1389         while (argc > 0) {
1390                 if (strcmp(*argv, "tos") == 0 ||
1391                     matches(*argv, "dsfield") == 0) {
1392                         __u32 tos;
1393                         NEXT_ARG();
1394                         if (rtnl_dsfield_a2n(&tos, *argv))
1395                                 invarg("TOS value is invalid\n", *argv);
1396                         req.r.rtm_tos = tos;
1397                 } else if (matches(*argv, "from") == 0) {
1398                         inet_prefix addr;
1399                         NEXT_ARG();
1400                         if (matches(*argv, "help") == 0)
1401                                 usage();
1402                         from_ok = 1;
1403                         get_prefix(&addr, *argv, req.r.rtm_family);
1404                         if (req.r.rtm_family == AF_UNSPEC)
1405                                 req.r.rtm_family = addr.family;
1406                         if (addr.bytelen)
1407                                 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1408                         req.r.rtm_src_len = addr.bitlen;
1409                 } else if (matches(*argv, "iif") == 0) {
1410                         NEXT_ARG();
1411                         idev = *argv;
1412                 } else if (matches(*argv, "mark") == 0) {
1413                         NEXT_ARG();
1414                         get_unsigned(&mark, *argv, 0);
1415                 } else if (matches(*argv, "oif") == 0 ||
1416                            strcmp(*argv, "dev") == 0) {
1417                         NEXT_ARG();
1418                         odev = *argv;
1419                 } else if (matches(*argv, "notify") == 0) {
1420                         req.r.rtm_flags |= RTM_F_NOTIFY;
1421                 } else if (matches(*argv, "connected") == 0) {
1422                         connected = 1;
1423                 } else {
1424                         inet_prefix addr;
1425                         if (strcmp(*argv, "to") == 0) {
1426                                 NEXT_ARG();
1427                         }
1428                         if (matches(*argv, "help") == 0)
1429                                 usage();
1430                         get_prefix(&addr, *argv, req.r.rtm_family);
1431                         if (req.r.rtm_family == AF_UNSPEC)
1432                                 req.r.rtm_family = addr.family;
1433                         if (addr.bytelen)
1434                                 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1435                         req.r.rtm_dst_len = addr.bitlen;
1436                 }
1437                 argc--; argv++;
1438         }
1439
1440         if (req.r.rtm_dst_len == 0) {
1441                 fprintf(stderr, "need at least destination address\n");
1442                 exit(1);
1443         }
1444
1445         ll_init_map(&rth);
1446
1447         if (idev || odev)  {
1448                 int idx;
1449
1450                 if (idev) {
1451                         if ((idx = ll_name_to_index(idev)) == 0) {
1452                                 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1453                                 return -1;
1454                         }
1455                         addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1456                 }
1457                 if (odev) {
1458                         if ((idx = ll_name_to_index(odev)) == 0) {
1459                                 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1460                                 return -1;
1461                         }
1462                         addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1463                 }
1464         }
1465         if (mark)
1466                 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1467
1468         if (req.r.rtm_family == AF_UNSPEC)
1469                 req.r.rtm_family = AF_INET;
1470
1471         if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1472                 exit(2);
1473
1474         if (connected && !from_ok) {
1475                 struct rtmsg *r = NLMSG_DATA(&req.n);
1476                 int len = req.n.nlmsg_len;
1477                 struct rtattr * tb[RTA_MAX+1];
1478
1479                 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1480                         fprintf(stderr, "An error :-)\n");
1481                         exit(1);
1482                 }
1483
1484                 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1485                         fprintf(stderr, "Not a route?\n");
1486                         return -1;
1487                 }
1488                 len -= NLMSG_LENGTH(sizeof(*r));
1489                 if (len < 0) {
1490                         fprintf(stderr, "Wrong len %d\n", len);
1491                         return -1;
1492                 }
1493
1494                 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1495
1496                 if (tb[RTA_PREFSRC]) {
1497                         tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1498                         r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1499                 } else if (!tb[RTA_SRC]) {
1500                         fprintf(stderr, "Failed to connect the route\n");
1501                         return -1;
1502                 }
1503                 if (!odev && tb[RTA_OIF])
1504                         tb[RTA_OIF]->rta_type = 0;
1505                 if (tb[RTA_GATEWAY])
1506                         tb[RTA_GATEWAY]->rta_type = 0;
1507                 if (!idev && tb[RTA_IIF])
1508                         tb[RTA_IIF]->rta_type = 0;
1509                 req.n.nlmsg_flags = NLM_F_REQUEST;
1510                 req.n.nlmsg_type = RTM_GETROUTE;
1511
1512                 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1513                         exit(2);
1514         }
1515
1516         if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1517                 fprintf(stderr, "An error :-)\n");
1518                 exit(1);
1519         }
1520
1521         exit(0);
1522 }
1523
1524 int restore_handler(const struct sockaddr_nl *nl, struct nlmsghdr *n, void *arg)
1525 {
1526         int ret;
1527
1528         n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1529
1530         ll_init_map(&rth);
1531
1532         ret = rtnl_talk(&rth, n, 0, 0, n, NULL, NULL);
1533         if ((ret < 0) && (errno == EEXIST))
1534                 ret = 0;
1535
1536         return ret;
1537 }
1538
1539 int iproute_restore(void)
1540 {
1541         exit(rtnl_from_file(stdin, &restore_handler, NULL));
1542 }
1543
1544 void iproute_reset_filter()
1545 {
1546         memset(&filter, 0, sizeof(filter));
1547         filter.mdst.bitlen = -1;
1548         filter.msrc.bitlen = -1;
1549 }
1550
1551 int do_iproute(int argc, char **argv)
1552 {
1553         if (argc < 1)
1554                 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
1555
1556         if (matches(*argv, "add") == 0)
1557                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1558                                       argc-1, argv+1);
1559         if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1560                 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1561                                       argc-1, argv+1);
1562         if (matches(*argv, "replace") == 0)
1563                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1564                                       argc-1, argv+1);
1565         if (matches(*argv, "prepend") == 0)
1566                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1567                                       argc-1, argv+1);
1568         if (matches(*argv, "append") == 0)
1569                 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1570                                       argc-1, argv+1);
1571         if (matches(*argv, "test") == 0)
1572                 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1573                                       argc-1, argv+1);
1574         if (matches(*argv, "delete") == 0)
1575                 return iproute_modify(RTM_DELROUTE, 0,
1576                                       argc-1, argv+1);
1577         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1578             || matches(*argv, "lst") == 0)
1579                 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
1580         if (matches(*argv, "get") == 0)
1581                 return iproute_get(argc-1, argv+1);
1582         if (matches(*argv, "flush") == 0)
1583                 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
1584         if (matches(*argv, "save") == 0)
1585                 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
1586         if (matches(*argv, "restore") == 0)
1587                 return iproute_restore();
1588         if (matches(*argv, "help") == 0)
1589                 usage();
1590         fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1591         exit(-1);
1592 }
1593