iproute2/ip/iproute.c
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   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 <fcntl.h>
  17#include <string.h>
  18#include <time.h>
  19#include <sys/time.h>
  20#include <sys/socket.h>
  21#include <netinet/in.h>
  22#include <netinet/ip.h>
  23#include <arpa/inet.h>
  24#include <linux/in_route.h>
  25#include <linux/icmpv6.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
  36enum list_action {
  37        IPROUTE_LIST,
  38        IPROUTE_FLUSH,
  39        IPROUTE_SAVE,
  40};
  41static 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        [RTAX_QUICKACK]                 = "quickack",
  56        [RTAX_CC_ALGO]                  = "congctl",
  57        [RTAX_FASTOPEN_NO_COOKIE]       = "fastopen_no_cookie"
  58};
  59static void usage(void) __attribute__((noreturn));
  60
  61static void usage(void)
  62{
  63        fprintf(stderr,
  64                "Usage: ip route { list | flush } SELECTOR\n"
  65                "       ip route save SELECTOR\n"
  66                "       ip route restore\n"
  67                "       ip route showdump\n"
  68                "       ip route get [ ROUTE_GET_FLAGS ] ADDRESS\n"
  69                "                            [ from ADDRESS iif STRING ]\n"
  70                "                            [ oif STRING ] [ tos TOS ]\n"
  71                "                            [ mark NUMBER ] [ vrf NAME ]\n"
  72                "                            [ uid NUMBER ] [ ipproto PROTOCOL ]\n"
  73                "                            [ sport NUMBER ] [ dport NUMBER ]\n"
  74                "       ip route { add | del | change | append | replace } ROUTE\n"
  75                "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
  76                "            [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
  77                "            [ type TYPE ] [ scope SCOPE ]\n"
  78                "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
  79                "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
  80                "             [ table TABLE_ID ] [ proto RTPROTO ]\n"
  81                "             [ scope SCOPE ] [ metric METRIC ]\n"
  82                "             [ ttl-propagate { enabled | disabled } ]\n"
  83                "INFO_SPEC := { NH | nhid ID } OPTIONS FLAGS [ nexthop NH ]...\n"
  84                "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
  85                "           [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
  86                "FAMILY := [ inet | inet6 | mpls | bridge | link ]\n"
  87                "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
  88                "           [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
  89                "           [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
  90                "           [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
  91                "           [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
  92                "           [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
  93                "           [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
  94                "TYPE := { unicast | local | broadcast | multicast | throw |\n"
  95                "          unreachable | prohibit | blackhole | nat }\n"
  96                "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
  97                "SCOPE := [ host | link | global | NUMBER ]\n"
  98                "NHFLAGS := [ onlink | pervasive ]\n"
  99                "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
 100                "PREF := [ low | medium | high ]\n"
 101                "TIME := NUMBER[s|ms]\n"
 102                "BOOL := [1|0]\n"
 103                "FEATURES := ecn\n"
 104                "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local | rpl ]\n"
 105                "ENCAPHDR := [ MPLSLABEL | SEG6HDR | SEG6LOCAL ]\n"
 106                "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
 107                "SEGMODE := [ encap | inline ]\n"
 108                "SEG6LOCAL := action ACTION [ OPTIONS ] [ count ]\n"
 109                "ACTION := { End | End.X | End.T | End.DX2 | End.DX6 | End.DX4 |\n"
 110                "            End.DT6 | End.DT4 | End.DT46 | End.B6 | End.B6.Encaps |\n"
 111                "            End.BM | End.S | End.AS | End.AM | End.BPF }\n"
 112                "OPTIONS := OPTION [ OPTIONS ]\n"
 113                "OPTION := { srh SEG6HDR | nh4 ADDR | nh6 ADDR | iif DEV | oif DEV |\n"
 114                "            table TABLEID | vrftable TABLEID | endpoint PROGNAME }\n"
 115                "ROUTE_GET_FLAGS := [ fibmatch ]\n");
 116        exit(-1);
 117}
 118
 119
 120static struct
 121{
 122        unsigned int tb;
 123        int cloned;
 124        int flushed;
 125        char *flushb;
 126        int flushp;
 127        int flushe;
 128        int protocol, protocolmask;
 129        int scope, scopemask;
 130        __u64 typemask;
 131        int tos, tosmask;
 132        int iif, iifmask;
 133        int oif, oifmask;
 134        int mark, markmask;
 135        int realm, realmmask;
 136        __u32 metric, metricmask;
 137        inet_prefix rprefsrc;
 138        inet_prefix rvia;
 139        inet_prefix rdst;
 140        inet_prefix mdst;
 141        inet_prefix rsrc;
 142        inet_prefix msrc;
 143} filter;
 144
 145static int flush_update(void)
 146{
 147        if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
 148                perror("Failed to send flush request");
 149                return -2;
 150        }
 151        filter.flushp = 0;
 152        return 0;
 153}
 154
 155static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
 156{
 157        struct rtmsg *r = NLMSG_DATA(n);
 158        inet_prefix dst = { .family = r->rtm_family };
 159        inet_prefix src = { .family = r->rtm_family };
 160        inet_prefix via = { .family = r->rtm_family };
 161        inet_prefix prefsrc = { .family = r->rtm_family };
 162        __u32 table;
 163        static int ip6_multiple_tables;
 164
 165        table = rtm_get_table(r, tb);
 166
 167        if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
 168                return 0;
 169
 170        if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
 171                ip6_multiple_tables = 1;
 172
 173        if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
 174                return 0;
 175
 176        if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
 177                if (filter.tb) {
 178                        if (filter.tb == RT_TABLE_LOCAL) {
 179                                if (r->rtm_type != RTN_LOCAL)
 180                                        return 0;
 181                        } else if (filter.tb == RT_TABLE_MAIN) {
 182                                if (r->rtm_type == RTN_LOCAL)
 183                                        return 0;
 184                        } else {
 185                                return 0;
 186                        }
 187                }
 188        } else {
 189                if (filter.tb > 0 && filter.tb != table)
 190                        return 0;
 191        }
 192        if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
 193                return 0;
 194        if ((filter.scope^r->rtm_scope)&filter.scopemask)
 195                return 0;
 196
 197        if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
 198                return 0;
 199        if ((filter.tos^r->rtm_tos)&filter.tosmask)
 200                return 0;
 201        if (filter.rdst.family) {
 202                if (r->rtm_family != filter.rdst.family ||
 203                    filter.rdst.bitlen > r->rtm_dst_len)
 204                        return 0;
 205        } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
 206                if (filter.rdst.bitlen > r->rtm_dst_len)
 207                        return 0;
 208        }
 209        if (filter.mdst.family) {
 210                if (r->rtm_family != filter.mdst.family ||
 211                    (filter.mdst.bitlen >= 0 &&
 212                     filter.mdst.bitlen < r->rtm_dst_len))
 213                        return 0;
 214        } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
 215                if (filter.mdst.bitlen >= 0 &&
 216                    filter.mdst.bitlen < r->rtm_dst_len)
 217                        return 0;
 218        }
 219        if (filter.rsrc.family) {
 220                if (r->rtm_family != filter.rsrc.family ||
 221                    filter.rsrc.bitlen > r->rtm_src_len)
 222                        return 0;
 223        } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
 224                if (filter.rsrc.bitlen > r->rtm_src_len)
 225                        return 0;
 226        }
 227        if (filter.msrc.family) {
 228                if (r->rtm_family != filter.msrc.family ||
 229                    (filter.msrc.bitlen >= 0 &&
 230                     filter.msrc.bitlen < r->rtm_src_len))
 231                        return 0;
 232        } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
 233                if (filter.msrc.bitlen >= 0 &&
 234                    filter.msrc.bitlen < r->rtm_src_len)
 235                        return 0;
 236        }
 237        if (filter.rvia.family) {
 238                int family = r->rtm_family;
 239
 240                if (tb[RTA_VIA]) {
 241                        struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
 242
 243                        family = via->rtvia_family;
 244                }
 245                if (family != filter.rvia.family)
 246                        return 0;
 247        }
 248        if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
 249                return 0;
 250
 251        if (tb[RTA_DST])
 252                memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
 253        if (filter.rsrc.family || filter.msrc.family ||
 254            filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
 255            filter.msrc.flags & PREFIXLEN_SPECIFIED) {
 256                if (tb[RTA_SRC])
 257                        memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
 258        }
 259        if (filter.rvia.bitlen > 0) {
 260                if (tb[RTA_GATEWAY])
 261                        memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
 262                if (tb[RTA_VIA]) {
 263                        size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
 264                        struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
 265
 266                        via.family = rtvia->rtvia_family;
 267                        memcpy(&via.data, rtvia->rtvia_addr, len);
 268                }
 269        }
 270        if (filter.rprefsrc.bitlen > 0) {
 271                if (tb[RTA_PREFSRC])
 272                        memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
 273        }
 274
 275        if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
 276            inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
 277                return 0;
 278        if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
 279            inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
 280                return 0;
 281
 282        if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
 283            inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
 284                return 0;
 285        if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
 286            filter.msrc.bitlen >= 0 &&
 287            inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
 288                return 0;
 289
 290        if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
 291                return 0;
 292        if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
 293                return 0;
 294        if (filter.realmmask) {
 295                __u32 realms = 0;
 296
 297                if (tb[RTA_FLOW])
 298                        realms = rta_getattr_u32(tb[RTA_FLOW]);
 299                if ((realms^filter.realm)&filter.realmmask)
 300                        return 0;
 301        }
 302        if (filter.iifmask) {
 303                int iif = 0;
 304
 305                if (tb[RTA_IIF])
 306                        iif = rta_getattr_u32(tb[RTA_IIF]);
 307                if ((iif^filter.iif)&filter.iifmask)
 308                        return 0;
 309        }
 310        if (filter.oifmask) {
 311                int oif = 0;
 312
 313                if (tb[RTA_OIF])
 314                        oif = rta_getattr_u32(tb[RTA_OIF]);
 315                if ((oif^filter.oif)&filter.oifmask)
 316                        return 0;
 317        }
 318        if (filter.markmask) {
 319                int mark = 0;
 320
 321                if (tb[RTA_MARK])
 322                        mark = rta_getattr_u32(tb[RTA_MARK]);
 323                if ((mark ^ filter.mark) & filter.markmask)
 324                        return 0;
 325        }
 326        if (filter.metricmask) {
 327                __u32 metric = 0;
 328
 329                if (tb[RTA_PRIORITY])
 330                        metric = rta_getattr_u32(tb[RTA_PRIORITY]);
 331                if ((metric ^ filter.metric) & filter.metricmask)
 332                        return 0;
 333        }
 334        if (filter.flushb &&
 335            r->rtm_family == AF_INET6 &&
 336            r->rtm_dst_len == 0 &&
 337            r->rtm_type == RTN_UNREACHABLE &&
 338            tb[RTA_PRIORITY] &&
 339            rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
 340                return 0;
 341
 342        return 1;
 343}
 344
 345static void print_rtax_features(FILE *fp, unsigned int features)
 346{
 347        unsigned int of = features;
 348
 349        if (features & RTAX_FEATURE_ECN) {
 350                print_null(PRINT_ANY, "ecn", "ecn ", NULL);
 351                features &= ~RTAX_FEATURE_ECN;
 352        }
 353
 354        if (features)
 355                print_0xhex(PRINT_ANY,
 356                            "features", "%#llx ", of);
 357}
 358
 359void print_rt_flags(FILE *fp, unsigned int flags)
 360{
 361        open_json_array(PRINT_JSON,
 362                        is_json_context() ?  "flags" : "");
 363
 364        if (flags & RTNH_F_DEAD)
 365                print_string(PRINT_ANY, NULL, "%s ", "dead");
 366        if (flags & RTNH_F_ONLINK)
 367                print_string(PRINT_ANY, NULL, "%s ", "onlink");
 368        if (flags & RTNH_F_PERVASIVE)
 369                print_string(PRINT_ANY, NULL, "%s ", "pervasive");
 370        if (flags & RTNH_F_OFFLOAD)
 371                print_string(PRINT_ANY, NULL, "%s ", "offload");
 372        if (flags & RTNH_F_TRAP)
 373                print_string(PRINT_ANY, NULL, "%s ", "trap");
 374        if (flags & RTM_F_NOTIFY)
 375                print_string(PRINT_ANY, NULL, "%s ", "notify");
 376        if (flags & RTNH_F_LINKDOWN)
 377                print_string(PRINT_ANY, NULL, "%s ", "linkdown");
 378        if (flags & RTNH_F_UNRESOLVED)
 379                print_string(PRINT_ANY, NULL, "%s ", "unresolved");
 380        if (flags & RTM_F_OFFLOAD)
 381                print_string(PRINT_ANY, NULL, "%s ", "rt_offload");
 382        if (flags & RTM_F_TRAP)
 383                print_string(PRINT_ANY, NULL, "%s ", "rt_trap");
 384        if (flags & RTM_F_OFFLOAD_FAILED)
 385                print_string(PRINT_ANY, NULL, "%s ", "rt_offload_failed");
 386
 387        close_json_array(PRINT_JSON, NULL);
 388}
 389
 390static void print_rt_pref(FILE *fp, unsigned int pref)
 391{
 392
 393        switch (pref) {
 394        case ICMPV6_ROUTER_PREF_LOW:
 395                print_string(PRINT_ANY,
 396                             "pref", "pref %s", "low");
 397                break;
 398        case ICMPV6_ROUTER_PREF_MEDIUM:
 399                print_string(PRINT_ANY,
 400                             "pref", "pref %s", "medium");
 401                break;
 402        case ICMPV6_ROUTER_PREF_HIGH:
 403                print_string(PRINT_ANY,
 404                             "pref", "pref %s", "high");
 405                break;
 406        default:
 407                print_uint(PRINT_ANY,
 408                           "pref", "%u", pref);
 409        }
 410}
 411
 412void print_rta_if(FILE *fp, const struct rtattr *rta, const char *prefix)
 413{
 414        const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
 415
 416        if (is_json_context())
 417                print_string(PRINT_JSON, prefix, NULL, ifname);
 418        else {
 419                fprintf(fp, "%s ", prefix);
 420                color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
 421        }
 422}
 423
 424static void print_cache_flags(FILE *fp, __u32 flags)
 425{
 426        json_writer_t *jw = get_json_writer();
 427        flags &= ~0xFFFF;
 428
 429        if (jw) {
 430                jsonw_name(jw, "cache");
 431                jsonw_start_array(jw);
 432        } else {
 433                fprintf(fp, "%s    cache ", _SL_);
 434                if (flags == 0)
 435                        return;
 436                putc('<', fp);
 437        }
 438
 439#define PRTFL(fl, flname)                                               \
 440        if (flags & RTCF_##fl) {                                        \
 441                flags &= ~RTCF_##fl;                                    \
 442                if (jw)                                                 \
 443                        jsonw_string(jw, flname);                       \
 444                else                                                    \
 445                        fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
 446        }
 447
 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#undef PRTFL
 463
 464        if (flags)
 465                print_hex(PRINT_ANY, "flags", "%x>", flags);
 466
 467        if (jw)
 468                jsonw_end_array(jw);
 469}
 470
 471static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
 472{
 473        static int hz;
 474
 475        if (!hz)
 476                hz = get_user_hz();
 477
 478        if (ci->rta_expires != 0)
 479                print_int(PRINT_ANY, "expires",
 480                           "expires %dsec ", ci->rta_expires/hz);
 481        if (ci->rta_error != 0)
 482                print_uint(PRINT_ANY, "error",
 483                           "error %u ", ci->rta_error);
 484
 485        if (show_stats) {
 486                if (ci->rta_clntref)
 487                        print_uint(PRINT_ANY, "users",
 488                                   "users %u ", ci->rta_clntref);
 489                if (ci->rta_used != 0)
 490                        print_uint(PRINT_ANY, "used",
 491                                   "used %u ", ci->rta_used);
 492                if (ci->rta_lastuse != 0)
 493                        print_uint(PRINT_ANY, "age",
 494                                   "age %usec ", ci->rta_lastuse/hz);
 495        }
 496        if (ci->rta_id)
 497                print_0xhex(PRINT_ANY, "ipid",
 498                            "ipid 0x%04llx ", ci->rta_id);
 499        if (ci->rta_ts || ci->rta_tsage) {
 500                print_0xhex(PRINT_ANY, "ts",
 501                            "ts 0x%llx", ci->rta_ts);
 502                print_uint(PRINT_ANY, "tsage",
 503                           "tsage %usec ", ci->rta_tsage);
 504        }
 505}
 506
 507static void print_rta_flow(FILE *fp, const struct rtattr *rta)
 508{
 509        __u32 to = rta_getattr_u32(rta);
 510        __u32 from = to >> 16;
 511        SPRINT_BUF(b1);
 512
 513        to &= 0xFFFF;
 514        if (is_json_context()) {
 515                open_json_object("flow");
 516
 517                if (from)
 518                        print_string(PRINT_JSON, "from", NULL,
 519                                     rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
 520                print_string(PRINT_JSON, "to", NULL,
 521                             rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
 522                close_json_object();
 523        } else {
 524                fprintf(fp, "realm%s ", from ? "s" : "");
 525
 526                if (from)
 527                        print_string(PRINT_FP, NULL, "%s/",
 528                                     rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
 529                print_string(PRINT_FP, NULL, "%s ",
 530                             rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
 531        }
 532}
 533
 534static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
 535                             const struct rtattr *rta)
 536{
 537        const char *newdst = format_host_rta(r->rtm_family, rta);
 538
 539        if (is_json_context())
 540                print_string(PRINT_JSON, "to", NULL, newdst);
 541        else {
 542                fprintf(fp, "as to ");
 543                print_color_string(PRINT_FP,
 544                                   ifa_family_color(r->rtm_family),
 545                                   NULL, "%s ", newdst);
 546        }
 547}
 548
 549void print_rta_gateway(FILE *fp, unsigned char family, const struct rtattr *rta)
 550{
 551        const char *gateway = format_host_rta(family, rta);
 552
 553        if (is_json_context())
 554                print_string(PRINT_JSON, "gateway", NULL, gateway);
 555        else {
 556                fprintf(fp, "via ");
 557                print_color_string(PRINT_FP,
 558                                   ifa_family_color(family),
 559                                   NULL, "%s ", gateway);
 560        }
 561}
 562
 563static void print_rta_via(FILE *fp, const struct rtattr *rta)
 564{
 565        size_t len = RTA_PAYLOAD(rta) - 2;
 566        const struct rtvia *via = RTA_DATA(rta);
 567
 568        if (is_json_context()) {
 569                open_json_object("via");
 570                print_string(PRINT_JSON, "family", NULL,
 571                             family_name(via->rtvia_family));
 572                print_string(PRINT_JSON, "host", NULL,
 573                             format_host(via->rtvia_family, len,
 574                                         via->rtvia_addr));
 575                close_json_object();
 576        } else {
 577                print_string(PRINT_FP, NULL, "via %s ",
 578                             family_name(via->rtvia_family));
 579                print_color_string(PRINT_FP,
 580                                   ifa_family_color(via->rtvia_family),
 581                                   NULL, "%s ",
 582                                   format_host(via->rtvia_family,
 583                                               len, via->rtvia_addr));
 584        }
 585}
 586
 587static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
 588{
 589        struct rtattr *mxrta[RTAX_MAX+1];
 590        unsigned int mxlock = 0;
 591        int i;
 592
 593        open_json_array(PRINT_JSON, "metrics");
 594        open_json_object(NULL);
 595
 596        parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
 597
 598        if (mxrta[RTAX_LOCK])
 599                mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
 600
 601        for (i = 2; i <= RTAX_MAX; i++) {
 602                __u32 val = 0U;
 603
 604                if (mxrta[i] == NULL && !(mxlock & (1 << i)))
 605                        continue;
 606
 607                if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
 608                        val = rta_getattr_u32(mxrta[i]);
 609
 610                if (i == RTAX_HOPLIMIT && (int)val == -1)
 611                        continue;
 612
 613                if (!is_json_context()) {
 614                        if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
 615                                fprintf(fp, "%s ", mx_names[i]);
 616                        else
 617                                fprintf(fp, "metric %d ", i);
 618
 619                        if (mxlock & (1<<i))
 620                                fprintf(fp, "lock ");
 621                }
 622
 623                switch (i) {
 624                case RTAX_FEATURES:
 625                        print_rtax_features(fp, val);
 626                        break;
 627                default:
 628                        print_uint(PRINT_ANY, mx_names[i], "%u ", val);
 629                        break;
 630
 631                case RTAX_RTT:
 632                case RTAX_RTTVAR:
 633                case RTAX_RTO_MIN:
 634                        if (i == RTAX_RTT)
 635                                val /= 8;
 636                        else if (i == RTAX_RTTVAR)
 637                                val /= 4;
 638
 639                        if (is_json_context())
 640                                print_uint(PRINT_JSON, mx_names[i],
 641                                           NULL, val);
 642                        else {
 643                                if (val >= 1000)
 644                                        fprintf(fp, "%gs ", val/1e3);
 645                                else
 646                                        fprintf(fp, "%ums ", val);
 647                        }
 648                        break;
 649                case RTAX_CC_ALGO:
 650                        print_string(PRINT_ANY, "congestion",
 651                                     "%s ", rta_getattr_str(mxrta[i]));
 652                        break;
 653                }
 654        }
 655
 656        close_json_object();
 657        close_json_array(PRINT_JSON, NULL);
 658}
 659
 660static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
 661                                struct rtattr *rta)
 662{
 663        const struct rtnexthop *nh = RTA_DATA(rta);
 664        int len = RTA_PAYLOAD(rta);
 665        int first = 1;
 666
 667        open_json_array(PRINT_JSON, "nexthops");
 668
 669        while (len >= sizeof(*nh)) {
 670                struct rtattr *tb[RTA_MAX + 1];
 671
 672                if (nh->rtnh_len > len)
 673                        break;
 674
 675                open_json_object(NULL);
 676
 677                if ((r->rtm_flags & RTM_F_CLONED) &&
 678                    r->rtm_type == RTN_MULTICAST) {
 679                        if (first) {
 680                                print_string(PRINT_FP, NULL, "Oifs: ", NULL);
 681                                first = 0;
 682                        } else {
 683                                print_string(PRINT_FP, NULL, " ", NULL);
 684                        }
 685                } else
 686                        print_string(PRINT_FP, NULL, "%s\tnexthop ", _SL_);
 687
 688                if (nh->rtnh_len > sizeof(*nh)) {
 689                        parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
 690                                     nh->rtnh_len - sizeof(*nh));
 691
 692                        if (tb[RTA_ENCAP])
 693                                lwt_print_encap(fp,
 694                                                tb[RTA_ENCAP_TYPE],
 695                                                tb[RTA_ENCAP]);
 696                        if (tb[RTA_NEWDST])
 697                                print_rta_newdst(fp, r, tb[RTA_NEWDST]);
 698                        if (tb[RTA_GATEWAY])
 699                                print_rta_gateway(fp, r->rtm_family,
 700                                                  tb[RTA_GATEWAY]);
 701                        if (tb[RTA_VIA])
 702                                print_rta_via(fp, tb[RTA_VIA]);
 703                        if (tb[RTA_FLOW])
 704                                print_rta_flow(fp, tb[RTA_FLOW]);
 705                }
 706
 707                if ((r->rtm_flags & RTM_F_CLONED) &&
 708                    r->rtm_type == RTN_MULTICAST) {
 709                        print_string(PRINT_ANY, "dev",
 710                                     "%s", ll_index_to_name(nh->rtnh_ifindex));
 711
 712                        if (nh->rtnh_hops != 1)
 713                                print_int(PRINT_ANY, "ttl", "(ttl>%d)", nh->rtnh_hops);
 714
 715                        print_string(PRINT_FP, NULL, " ", NULL);
 716                } else {
 717                        print_string(PRINT_ANY, "dev",
 718                                     "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
 719
 720                        if (r->rtm_family != AF_MPLS)
 721                                print_int(PRINT_ANY, "weight",
 722                                          "weight %d ", nh->rtnh_hops + 1);
 723                }
 724
 725                print_rt_flags(fp, nh->rtnh_flags);
 726
 727                len -= NLMSG_ALIGN(nh->rtnh_len);
 728                nh = RTNH_NEXT(nh);
 729
 730                close_json_object();
 731        }
 732        close_json_array(PRINT_JSON, NULL);
 733}
 734
 735int print_route(struct nlmsghdr *n, void *arg)
 736{
 737        FILE *fp = (FILE *)arg;
 738        struct rtmsg *r = NLMSG_DATA(n);
 739        int len = n->nlmsg_len;
 740        struct rtattr *tb[RTA_MAX+1];
 741        int family, color, host_len;
 742        __u32 table;
 743        int ret;
 744
 745        SPRINT_BUF(b1);
 746
 747        if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
 748                fprintf(stderr, "Not a route: %08x %08x %08x\n",
 749                        n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 750                return -1;
 751        }
 752        if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
 753                return 0;
 754        len -= NLMSG_LENGTH(sizeof(*r));
 755        if (len < 0) {
 756                fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 757                return -1;
 758        }
 759
 760        host_len = af_bit_len(r->rtm_family);
 761
 762        parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
 763        table = rtm_get_table(r, tb);
 764
 765        if (!filter_nlmsg(n, tb, host_len))
 766                return 0;
 767
 768        if (filter.flushb) {
 769                struct nlmsghdr *fn;
 770
 771                if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
 772                        ret = flush_update();
 773                        if (ret < 0)
 774                                return ret;
 775                }
 776                fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
 777                memcpy(fn, n, n->nlmsg_len);
 778                fn->nlmsg_type = RTM_DELROUTE;
 779                fn->nlmsg_flags = NLM_F_REQUEST;
 780                fn->nlmsg_seq = ++rth.seq;
 781                filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
 782                filter.flushed++;
 783                if (show_stats < 2)
 784                        return 0;
 785        }
 786
 787        open_json_object(NULL);
 788        if (n->nlmsg_type == RTM_DELROUTE)
 789                print_bool(PRINT_ANY, "deleted", "Deleted ", true);
 790
 791        if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
 792            (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
 793                print_string(PRINT_ANY, "type", "%s ",
 794                             rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
 795
 796        color = COLOR_NONE;
 797        if (tb[RTA_DST]) {
 798                family = get_real_family(r->rtm_type, r->rtm_family);
 799                color = ifa_family_color(family);
 800
 801                if (r->rtm_dst_len != host_len) {
 802                        snprintf(b1, sizeof(b1),
 803                                 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
 804                                 r->rtm_dst_len);
 805                } else {
 806                        const char *hostname = format_host_rta_r(family, tb[RTA_DST],
 807                                          b1, sizeof(b1));
 808                        if (hostname)
 809                                strncpy(b1, hostname, sizeof(b1) - 1);
 810                }
 811        } else if (r->rtm_dst_len) {
 812                snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
 813        } else {
 814                strncpy(b1, "default", sizeof(b1));
 815        }
 816        print_color_string(PRINT_ANY, color,
 817                           "dst", "%s ", b1);
 818
 819        if (tb[RTA_SRC]) {
 820                family = get_real_family(r->rtm_type, r->rtm_family);
 821                color = ifa_family_color(family);
 822
 823                if (r->rtm_src_len != host_len) {
 824                        snprintf(b1, sizeof(b1),
 825                                 "%s/%u",
 826                                 rt_addr_n2a_rta(family, tb[RTA_SRC]),
 827                                 r->rtm_src_len);
 828                } else {
 829                        const char *hostname = format_host_rta_r(family, tb[RTA_SRC],
 830                                          b1, sizeof(b1));
 831                        if (hostname)
 832                                strncpy(b1, hostname, sizeof(b1) - 1);
 833                }
 834                print_color_string(PRINT_ANY, color,
 835                                   "from", "from %s ", b1);
 836        } else if (r->rtm_src_len) {
 837                snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
 838
 839                print_string(PRINT_ANY, "src", "from %s ", b1);
 840        }
 841
 842        if (tb[RTA_NH_ID])
 843                print_uint(PRINT_ANY, "nhid", "nhid %u ",
 844                           rta_getattr_u32(tb[RTA_NH_ID]));
 845
 846        if (tb[RTA_NEWDST])
 847                print_rta_newdst(fp, r, tb[RTA_NEWDST]);
 848
 849        if (tb[RTA_ENCAP])
 850                lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
 851
 852        if (r->rtm_tos && filter.tosmask != -1) {
 853                print_string(PRINT_ANY, "tos", "tos %s ",
 854                             rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
 855        }
 856
 857        if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
 858                print_rta_gateway(fp, r->rtm_family, tb[RTA_GATEWAY]);
 859
 860        if (tb[RTA_VIA])
 861                print_rta_via(fp, tb[RTA_VIA]);
 862
 863        if (tb[RTA_OIF] && filter.oifmask != -1)
 864                print_rta_if(fp, tb[RTA_OIF], "dev");
 865
 866        if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
 867                print_string(PRINT_ANY,
 868                             "table", "table %s ",
 869                             rtnl_rttable_n2a(table, b1, sizeof(b1)));
 870
 871        if (!(r->rtm_flags & RTM_F_CLONED)) {
 872                if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
 873                    filter.protocolmask != -1)
 874                        print_string(PRINT_ANY,
 875                                     "protocol", "proto %s ",
 876                                     rtnl_rtprot_n2a(r->rtm_protocol,
 877                                                     b1, sizeof(b1)));
 878
 879                if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
 880                    filter.scopemask != -1)
 881                        print_string(PRINT_ANY,
 882                                     "scope", "scope %s ",
 883                                     rtnl_rtscope_n2a(r->rtm_scope,
 884                                                      b1, sizeof(b1)));
 885        }
 886
 887        if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
 888                const char *psrc
 889                        = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
 890
 891                /* Do not use format_host(). It is our local addr
 892                   and symbolic name will not be useful.
 893                */
 894                if (is_json_context())
 895                        print_string(PRINT_JSON, "prefsrc", NULL, psrc);
 896                else {
 897                        fprintf(fp, "src ");
 898                        print_color_string(PRINT_FP,
 899                                           ifa_family_color(r->rtm_family),
 900                                           NULL, "%s ", psrc);
 901                }
 902
 903        }
 904
 905        if (tb[RTA_PRIORITY] && filter.metricmask != -1)
 906                print_uint(PRINT_ANY, "metric", "metric %u ",
 907                           rta_getattr_u32(tb[RTA_PRIORITY]));
 908
 909        print_rt_flags(fp, r->rtm_flags);
 910
 911        if (tb[RTA_MARK]) {
 912                unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
 913
 914                if (mark) {
 915                        if (is_json_context())
 916                                print_uint(PRINT_JSON, "mark", NULL, mark);
 917                        else if (mark >= 16)
 918                                print_0xhex(PRINT_FP, NULL,
 919                                            "mark 0x%llx ", mark);
 920                        else
 921                                print_uint(PRINT_FP, NULL,
 922                                           "mark %u ", mark);
 923                }
 924        }
 925
 926        if (tb[RTA_FLOW] && filter.realmmask != ~0U)
 927                print_rta_flow(fp, tb[RTA_FLOW]);
 928
 929        if (tb[RTA_UID])
 930                print_uint(PRINT_ANY, "uid", "uid %u ",
 931                           rta_getattr_u32(tb[RTA_UID]));
 932
 933        if (r->rtm_family == AF_INET) {
 934                if (r->rtm_flags & RTM_F_CLONED)
 935                        print_cache_flags(fp, r->rtm_flags);
 936
 937                if (tb[RTA_CACHEINFO])
 938                        print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
 939        } else if (r->rtm_family == AF_INET6) {
 940                if (tb[RTA_CACHEINFO])
 941                        print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
 942        }
 943
 944        if (tb[RTA_METRICS])
 945                print_rta_metrics(fp, tb[RTA_METRICS]);
 946
 947        if (tb[RTA_IIF] && filter.iifmask != -1)
 948                print_rta_if(fp, tb[RTA_IIF], "iif");
 949
 950        if (tb[RTA_PREF])
 951                print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
 952
 953        if (tb[RTA_TTL_PROPAGATE]) {
 954                bool propagate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
 955
 956                if (is_json_context())
 957                        print_bool(PRINT_JSON, "ttl-propogate", NULL,
 958                                   propagate);
 959                else
 960                        print_string(PRINT_FP, NULL,
 961                                     "ttl-propogate %s",
 962                                     propagate ? "enabled" : "disabled");
 963        }
 964
 965        if (tb[RTA_MULTIPATH])
 966                print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
 967
 968        /* If you are adding new route RTA_XXXX then place it above
 969         * the RTA_MULTIPATH else it will appear that the last nexthop
 970         * in the ECMP has new attributes
 971         */
 972
 973        print_string(PRINT_FP, NULL, "\n", NULL);
 974        close_json_object();
 975        fflush(fp);
 976        return 0;
 977}
 978
 979static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
 980                        struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
 981                        int *argcp, char ***argvp)
 982{
 983        int argc = *argcp;
 984        char **argv = *argvp;
 985
 986        while (++argv, --argc > 0) {
 987                if (strcmp(*argv, "via") == 0) {
 988                        inet_prefix addr;
 989                        int family;
 990
 991                        NEXT_ARG();
 992                        family = read_family(*argv);
 993                        if (family == AF_UNSPEC)
 994                                family = r->rtm_family;
 995                        else
 996                                NEXT_ARG();
 997                        get_addr(&addr, *argv, family);
 998                        if (r->rtm_family == AF_UNSPEC)
 999                                r->rtm_family = addr.family;
1000                        if (addr.family == r->rtm_family) {
1001                                if (rta_addattr_l(rta, len, RTA_GATEWAY,
1002                                                  &addr.data, addr.bytelen))
1003                                        return -1;
1004                                rtnh->rtnh_len += sizeof(struct rtattr)
1005                                                  + addr.bytelen;
1006                        } else {
1007                                if (rta_addattr_l(rta, len, RTA_VIA,
1008                                                  &addr.family, addr.bytelen + 2))
1009                                        return -1;
1010                                rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
1011                        }
1012                } else if (strcmp(*argv, "dev") == 0) {
1013                        NEXT_ARG();
1014                        rtnh->rtnh_ifindex = ll_name_to_index(*argv);
1015                        if (!rtnh->rtnh_ifindex)
1016                                return nodev(*argv);
1017                } else if (strcmp(*argv, "weight") == 0) {
1018                        unsigned int w;
1019
1020                        NEXT_ARG();
1021                        if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
1022                                invarg("\"weight\" is invalid\n", *argv);
1023                        rtnh->rtnh_hops = w - 1;
1024                } else if (strcmp(*argv, "onlink") == 0) {
1025                        rtnh->rtnh_flags |= RTNH_F_ONLINK;
1026                } else if (matches(*argv, "realms") == 0) {
1027                        __u32 realm;
1028
1029                        NEXT_ARG();
1030                        if (get_rt_realms_or_raw(&realm, *argv))
1031                                invarg("\"realm\" value is invalid\n", *argv);
1032                        if (rta_addattr32(rta, len, RTA_FLOW, realm))
1033                                return -1;
1034                        rtnh->rtnh_len += sizeof(struct rtattr) + 4;
1035                } else if (strcmp(*argv, "encap") == 0) {
1036                        int old_len = rta->rta_len;
1037
1038                        if (lwt_parse_encap(rta, len, &argc, &argv,
1039                                            RTA_ENCAP, RTA_ENCAP_TYPE))
1040                                return -1;
1041                        rtnh->rtnh_len += rta->rta_len - old_len;
1042                } else if (strcmp(*argv, "as") == 0) {
1043                        inet_prefix addr;
1044
1045                        NEXT_ARG();
1046                        if (strcmp(*argv, "to") == 0)
1047                                NEXT_ARG();
1048                        get_addr(&addr, *argv, r->rtm_family);
1049                        if (rta_addattr_l(rta, len, RTA_NEWDST,
1050                                          &addr.data, addr.bytelen))
1051                                return -1;
1052                        rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
1053                } else
1054                        break;
1055        }
1056        *argcp = argc;
1057        *argvp = argv;
1058        return 0;
1059}
1060
1061static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1062                          int argc, char **argv)
1063{
1064        char buf[4096];
1065        struct rtattr *rta = (void *)buf;
1066        struct rtnexthop *rtnh;
1067
1068        rta->rta_type = RTA_MULTIPATH;
1069        rta->rta_len = RTA_LENGTH(0);
1070        rtnh = RTA_DATA(rta);
1071
1072        while (argc > 0) {
1073                if (strcmp(*argv, "nexthop") != 0) {
1074                        fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1075                        exit(-1);
1076                }
1077                if (argc <= 1) {
1078                        fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1079                        exit(-1);
1080                }
1081                memset(rtnh, 0, sizeof(*rtnh));
1082                rtnh->rtnh_len = sizeof(*rtnh);
1083                rta->rta_len += rtnh->rtnh_len;
1084                if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
1085                        fprintf(stderr, "Error: cannot parse nexthop\n");
1086                        exit(-1);
1087                }
1088                rtnh = RTNH_NEXT(rtnh);
1089        }
1090
1091        if (rta->rta_len > RTA_LENGTH(0))
1092                return addattr_l(n, 4096, RTA_MULTIPATH,
1093                                 RTA_DATA(rta), RTA_PAYLOAD(rta));
1094        return 0;
1095}
1096
1097static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
1098{
1099        struct {
1100                struct nlmsghdr n;
1101                struct rtmsg            r;
1102                char                    buf[4096];
1103        } req = {
1104                .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1105                .n.nlmsg_flags = NLM_F_REQUEST | flags,
1106                .n.nlmsg_type = cmd,
1107                .r.rtm_family = preferred_family,
1108                .r.rtm_table = RT_TABLE_MAIN,
1109                .r.rtm_scope = RT_SCOPE_NOWHERE,
1110        };
1111        char  mxbuf[256];
1112        struct rtattr *mxrta = (void *)mxbuf;
1113        unsigned int mxlock = 0;
1114        char  *d = NULL;
1115        int gw_ok = 0;
1116        int dst_ok = 0;
1117        int nhs_ok = 0;
1118        int scope_ok = 0;
1119        int table_ok = 0;
1120        int raw = 0;
1121        int type_ok = 0;
1122        __u32 nhid = 0;
1123
1124        if (cmd != RTM_DELROUTE) {
1125                req.r.rtm_protocol = RTPROT_BOOT;
1126                req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1127                req.r.rtm_type = RTN_UNICAST;
1128        }
1129
1130        mxrta->rta_type = RTA_METRICS;
1131        mxrta->rta_len = RTA_LENGTH(0);
1132
1133        while (argc > 0) {
1134                if (strcmp(*argv, "src") == 0) {
1135                        inet_prefix addr;
1136
1137                        NEXT_ARG();
1138                        get_addr(&addr, *argv, req.r.rtm_family);
1139                        if (req.r.rtm_family == AF_UNSPEC)
1140                                req.r.rtm_family = addr.family;
1141                        addattr_l(&req.n, sizeof(req),
1142                                  RTA_PREFSRC, &addr.data, addr.bytelen);
1143                } else if (strcmp(*argv, "as") == 0) {
1144                        inet_prefix addr;
1145
1146                        NEXT_ARG();
1147                        if (strcmp(*argv, "to") == 0) {
1148                                NEXT_ARG();
1149                        }
1150                        get_addr(&addr, *argv, req.r.rtm_family);
1151                        if (req.r.rtm_family == AF_UNSPEC)
1152                                req.r.rtm_family = addr.family;
1153                        addattr_l(&req.n, sizeof(req),
1154                                  RTA_NEWDST, &addr.data, addr.bytelen);
1155                } else if (strcmp(*argv, "via") == 0) {
1156                        inet_prefix addr;
1157                        int family;
1158
1159                        if (gw_ok) {
1160                                invarg("use nexthop syntax to specify multiple via\n",
1161                                       *argv);
1162                        }
1163                        gw_ok = 1;
1164                        NEXT_ARG();
1165                        family = read_family(*argv);
1166                        if (family == AF_UNSPEC)
1167                                family = req.r.rtm_family;
1168                        else
1169                                NEXT_ARG();
1170                        get_addr(&addr, *argv, family);
1171                        if (req.r.rtm_family == AF_UNSPEC)
1172                                req.r.rtm_family = addr.family;
1173                        if (addr.family == req.r.rtm_family)
1174                                addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1175                                          &addr.data, addr.bytelen);
1176                        else
1177                                addattr_l(&req.n, sizeof(req), RTA_VIA,
1178                                          &addr.family, addr.bytelen+2);
1179                } else if (strcmp(*argv, "from") == 0) {
1180                        inet_prefix addr;
1181
1182                        NEXT_ARG();
1183                        get_prefix(&addr, *argv, req.r.rtm_family);
1184                        if (req.r.rtm_family == AF_UNSPEC)
1185                                req.r.rtm_family = addr.family;
1186                        if (addr.bytelen)
1187                                addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1188                        req.r.rtm_src_len = addr.bitlen;
1189                } else if (strcmp(*argv, "tos") == 0 ||
1190                           matches(*argv, "dsfield") == 0) {
1191                        __u32 tos;
1192
1193                        NEXT_ARG();
1194                        if (rtnl_dsfield_a2n(&tos, *argv))
1195                                invarg("\"tos\" value is invalid\n", *argv);
1196                        req.r.rtm_tos = tos;
1197                } else if (strcmp(*argv, "expires") == 0) {
1198                        __u32 expires;
1199
1200                        NEXT_ARG();
1201                        if (get_u32(&expires, *argv, 0))
1202                                invarg("\"expires\" value is invalid\n", *argv);
1203                        addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1204                } else if (matches(*argv, "metric") == 0 ||
1205                           matches(*argv, "priority") == 0 ||
1206                           strcmp(*argv, "preference") == 0) {
1207                        __u32 metric;
1208
1209                        NEXT_ARG();
1210                        if (get_u32(&metric, *argv, 0))
1211                                invarg("\"metric\" value is invalid\n", *argv);
1212                        addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1213                } else if (strcmp(*argv, "scope") == 0) {
1214                        __u32 scope = 0;
1215
1216                        NEXT_ARG();
1217                        if (rtnl_rtscope_a2n(&scope, *argv))
1218                                invarg("invalid \"scope\" value\n", *argv);
1219                        req.r.rtm_scope = scope;
1220                        scope_ok = 1;
1221                } else if (strcmp(*argv, "mtu") == 0) {
1222                        unsigned int mtu;
1223
1224                        NEXT_ARG();
1225                        if (strcmp(*argv, "lock") == 0) {
1226                                mxlock |= (1<<RTAX_MTU);
1227                                NEXT_ARG();
1228                        }
1229                        if (get_unsigned(&mtu, *argv, 0))
1230                                invarg("\"mtu\" value is invalid\n", *argv);
1231                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1232                } else if (strcmp(*argv, "hoplimit") == 0) {
1233                        unsigned int hoplimit;
1234
1235                        NEXT_ARG();
1236                        if (strcmp(*argv, "lock") == 0) {
1237                                mxlock |= (1<<RTAX_HOPLIMIT);
1238                                NEXT_ARG();
1239                        }
1240                        if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1241                                invarg("\"hoplimit\" value is invalid\n", *argv);
1242                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1243                } else if (strcmp(*argv, "advmss") == 0) {
1244                        unsigned int mss;
1245
1246                        NEXT_ARG();
1247                        if (strcmp(*argv, "lock") == 0) {
1248                                mxlock |= (1<<RTAX_ADVMSS);
1249                                NEXT_ARG();
1250                        }
1251                        if (get_unsigned(&mss, *argv, 0))
1252                                invarg("\"mss\" value is invalid\n", *argv);
1253                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1254                } else if (matches(*argv, "reordering") == 0) {
1255                        unsigned int reord;
1256
1257                        NEXT_ARG();
1258                        if (strcmp(*argv, "lock") == 0) {
1259                                mxlock |= (1<<RTAX_REORDERING);
1260                                NEXT_ARG();
1261                        }
1262                        if (get_unsigned(&reord, *argv, 0))
1263                                invarg("\"reordering\" value is invalid\n", *argv);
1264                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1265                } else if (strcmp(*argv, "rtt") == 0) {
1266                        unsigned int rtt;
1267
1268                        NEXT_ARG();
1269                        if (strcmp(*argv, "lock") == 0) {
1270                                mxlock |= (1<<RTAX_RTT);
1271                                NEXT_ARG();
1272                        }
1273                        if (get_time_rtt(&rtt, *argv, &raw))
1274                                invarg("\"rtt\" value is invalid\n", *argv);
1275                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1276                                (raw) ? rtt : rtt * 8);
1277                } else if (strcmp(*argv, "rto_min") == 0) {
1278                        unsigned int rto_min;
1279
1280                        NEXT_ARG();
1281                        mxlock |= (1<<RTAX_RTO_MIN);
1282                        if (get_time_rtt(&rto_min, *argv, &raw))
1283                                invarg("\"rto_min\" value is invalid\n",
1284                                       *argv);
1285                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1286                                      rto_min);
1287                } else if (matches(*argv, "window") == 0) {
1288                        unsigned int win;
1289
1290                        NEXT_ARG();
1291                        if (strcmp(*argv, "lock") == 0) {
1292                                mxlock |= (1<<RTAX_WINDOW);
1293                                NEXT_ARG();
1294                        }
1295                        if (get_unsigned(&win, *argv, 0))
1296                                invarg("\"window\" value is invalid\n", *argv);
1297                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1298                } else if (matches(*argv, "cwnd") == 0) {
1299                        unsigned int win;
1300
1301                        NEXT_ARG();
1302                        if (strcmp(*argv, "lock") == 0) {
1303                                mxlock |= (1<<RTAX_CWND);
1304                                NEXT_ARG();
1305                        }
1306                        if (get_unsigned(&win, *argv, 0))
1307                                invarg("\"cwnd\" value is invalid\n", *argv);
1308                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1309                } else if (matches(*argv, "initcwnd") == 0) {
1310                        unsigned int win;
1311
1312                        NEXT_ARG();
1313                        if (strcmp(*argv, "lock") == 0) {
1314                                mxlock |= (1<<RTAX_INITCWND);
1315                                NEXT_ARG();
1316                        }
1317                        if (get_unsigned(&win, *argv, 0))
1318                                invarg("\"initcwnd\" value is invalid\n", *argv);
1319                        rta_addattr32(mxrta, sizeof(mxbuf),
1320                                      RTAX_INITCWND, win);
1321                } else if (matches(*argv, "initrwnd") == 0) {
1322                        unsigned int win;
1323
1324                        NEXT_ARG();
1325                        if (strcmp(*argv, "lock") == 0) {
1326                                mxlock |= (1<<RTAX_INITRWND);
1327                                NEXT_ARG();
1328                        }
1329                        if (get_unsigned(&win, *argv, 0))
1330                                invarg("\"initrwnd\" value is invalid\n", *argv);
1331                        rta_addattr32(mxrta, sizeof(mxbuf),
1332                                      RTAX_INITRWND, win);
1333                } else if (matches(*argv, "features") == 0) {
1334                        unsigned int features = 0;
1335
1336                        while (argc > 0) {
1337                                NEXT_ARG();
1338
1339                                if (strcmp(*argv, "ecn") == 0)
1340                                        features |= RTAX_FEATURE_ECN;
1341                                else
1342                                        invarg("\"features\" value not valid\n", *argv);
1343                                break;
1344                        }
1345
1346                        rta_addattr32(mxrta, sizeof(mxbuf),
1347                                      RTAX_FEATURES, features);
1348                } else if (matches(*argv, "quickack") == 0) {
1349                        unsigned int quickack;
1350
1351                        NEXT_ARG();
1352                        if (get_unsigned(&quickack, *argv, 0))
1353                                invarg("\"quickack\" value is invalid\n", *argv);
1354                        if (quickack != 1 && quickack != 0)
1355                                invarg("\"quickack\" value should be 0 or 1\n", *argv);
1356                        rta_addattr32(mxrta, sizeof(mxbuf),
1357                                      RTAX_QUICKACK, quickack);
1358                } else if (matches(*argv, "congctl") == 0) {
1359                        NEXT_ARG();
1360                        if (strcmp(*argv, "lock") == 0) {
1361                                mxlock |= 1 << RTAX_CC_ALGO;
1362                                NEXT_ARG();
1363                        }
1364                        rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1365                                      strlen(*argv));
1366                } else if (matches(*argv, "rttvar") == 0) {
1367                        unsigned int win;
1368
1369                        NEXT_ARG();
1370                        if (strcmp(*argv, "lock") == 0) {
1371                                mxlock |= (1<<RTAX_RTTVAR);
1372                                NEXT_ARG();
1373                        }
1374                        if (get_time_rtt(&win, *argv, &raw))
1375                                invarg("\"rttvar\" value is invalid\n", *argv);
1376                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1377                                (raw) ? win : win * 4);
1378                } else if (matches(*argv, "ssthresh") == 0) {
1379                        unsigned int win;
1380
1381                        NEXT_ARG();
1382                        if (strcmp(*argv, "lock") == 0) {
1383                                mxlock |= (1<<RTAX_SSTHRESH);
1384                                NEXT_ARG();
1385                        }
1386                        if (get_unsigned(&win, *argv, 0))
1387                                invarg("\"ssthresh\" value is invalid\n", *argv);
1388                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1389                } else if (matches(*argv, "realms") == 0) {
1390                        __u32 realm;
1391
1392                        NEXT_ARG();
1393                        if (get_rt_realms_or_raw(&realm, *argv))
1394                                invarg("\"realm\" value is invalid\n", *argv);
1395                        addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1396                } else if (strcmp(*argv, "onlink") == 0) {
1397                        req.r.rtm_flags |= RTNH_F_ONLINK;
1398                } else if (strcmp(*argv, "nexthop") == 0) {
1399                        nhs_ok = 1;
1400                        break;
1401                } else if (!strcmp(*argv, "nhid")) {
1402                        NEXT_ARG();
1403                        if (get_u32(&nhid, *argv, 0))
1404                                invarg("\"id\" value is invalid\n", *argv);
1405                        addattr32(&req.n, sizeof(req), RTA_NH_ID, nhid);
1406                } else if (matches(*argv, "protocol") == 0) {
1407                        __u32 prot;
1408
1409                        NEXT_ARG();
1410                        if (rtnl_rtprot_a2n(&prot, *argv))
1411                                invarg("\"protocol\" value is invalid\n", *argv);
1412                        req.r.rtm_protocol = prot;
1413                } else if (matches(*argv, "table") == 0) {
1414                        __u32 tid;
1415
1416                        NEXT_ARG();
1417                        if (rtnl_rttable_a2n(&tid, *argv))
1418                                invarg("\"table\" value is invalid\n", *argv);
1419                        if (tid < 256)
1420                                req.r.rtm_table = tid;
1421                        else {
1422                                req.r.rtm_table = RT_TABLE_UNSPEC;
1423                                addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1424                        }
1425                        table_ok = 1;
1426                } else if (matches(*argv, "vrf") == 0) {
1427                        __u32 tid;
1428
1429                        NEXT_ARG();
1430                        tid = ipvrf_get_table(*argv);
1431                        if (tid == 0)
1432                                invarg("Invalid VRF\n", *argv);
1433                        if (tid < 256)
1434                                req.r.rtm_table = tid;
1435                        else {
1436                                req.r.rtm_table = RT_TABLE_UNSPEC;
1437                                addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1438                        }
1439                        table_ok = 1;
1440                } else if (strcmp(*argv, "dev") == 0 ||
1441                           strcmp(*argv, "oif") == 0) {
1442                        NEXT_ARG();
1443                        d = *argv;
1444                } else if (matches(*argv, "pref") == 0) {
1445                        __u8 pref;
1446
1447                        NEXT_ARG();
1448                        if (strcmp(*argv, "low") == 0)
1449                                pref = ICMPV6_ROUTER_PREF_LOW;
1450                        else if (strcmp(*argv, "medium") == 0)
1451                                pref = ICMPV6_ROUTER_PREF_MEDIUM;
1452                        else if (strcmp(*argv, "high") == 0)
1453                                pref = ICMPV6_ROUTER_PREF_HIGH;
1454                        else if (get_u8(&pref, *argv, 0))
1455                                invarg("\"pref\" value is invalid\n", *argv);
1456                        addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1457                } else if (strcmp(*argv, "encap") == 0) {
1458                        char buf[1024];
1459                        struct rtattr *rta = (void *)buf;
1460
1461                        rta->rta_type = RTA_ENCAP;
1462                        rta->rta_len = RTA_LENGTH(0);
1463
1464                        lwt_parse_encap(rta, sizeof(buf), &argc, &argv,
1465                                        RTA_ENCAP, RTA_ENCAP_TYPE);
1466
1467                        if (rta->rta_len > RTA_LENGTH(0))
1468                                addraw_l(&req.n, 1024
1469                                         , RTA_DATA(rta), RTA_PAYLOAD(rta));
1470                } else if (strcmp(*argv, "ttl-propagate") == 0) {
1471                        __u8 ttl_prop;
1472
1473                        NEXT_ARG();
1474                        if (matches(*argv, "enabled") == 0)
1475                                ttl_prop = 1;
1476                        else if (matches(*argv, "disabled") == 0)
1477                                ttl_prop = 0;
1478                        else
1479                                invarg("\"ttl-propagate\" value is invalid\n",
1480                                       *argv);
1481
1482                        addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1483                                 ttl_prop);
1484                } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1485                        unsigned int fastopen_no_cookie;
1486
1487                        NEXT_ARG();
1488                        if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1489                                invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1490                        if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1491                                invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1492                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1493                } else {
1494                        int type;
1495                        inet_prefix dst;
1496
1497                        if (strcmp(*argv, "to") == 0) {
1498                                NEXT_ARG();
1499                        }
1500                        if ((**argv < '0' || **argv > '9') &&
1501                            rtnl_rtntype_a2n(&type, *argv) == 0) {
1502                                NEXT_ARG();
1503                                req.r.rtm_type = type;
1504                                type_ok = 1;
1505                        }
1506
1507                        if (matches(*argv, "help") == 0)
1508                                usage();
1509                        if (dst_ok)
1510                                duparg2("to", *argv);
1511                        get_prefix(&dst, *argv, req.r.rtm_family);
1512                        if (req.r.rtm_family == AF_UNSPEC)
1513                                req.r.rtm_family = dst.family;
1514                        req.r.rtm_dst_len = dst.bitlen;
1515                        dst_ok = 1;
1516                        if (dst.bytelen)
1517                                addattr_l(&req.n, sizeof(req),
1518                                          RTA_DST, &dst.data, dst.bytelen);
1519                }
1520                argc--; argv++;
1521        }
1522
1523        if (!dst_ok)
1524                usage();
1525
1526        if (d) {
1527                int idx = ll_name_to_index(d);
1528
1529                if (!idx)
1530                        return nodev(d);
1531                addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1532        }
1533
1534        if (mxrta->rta_len > RTA_LENGTH(0)) {
1535                if (mxlock)
1536                        rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1537                addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1538        }
1539
1540        if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
1541                return -1;
1542
1543        if (req.r.rtm_family == AF_UNSPEC)
1544                req.r.rtm_family = AF_INET;
1545
1546        if (!table_ok) {
1547                if (req.r.rtm_type == RTN_LOCAL ||
1548                    req.r.rtm_type == RTN_BROADCAST ||
1549                    req.r.rtm_type == RTN_NAT ||
1550                    req.r.rtm_type == RTN_ANYCAST)
1551                        req.r.rtm_table = RT_TABLE_LOCAL;
1552        }
1553        if (!scope_ok) {
1554                if (req.r.rtm_family == AF_INET6 ||
1555                    req.r.rtm_family == AF_MPLS)
1556                        req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1557                else if (req.r.rtm_type == RTN_LOCAL ||
1558                         req.r.rtm_type == RTN_NAT)
1559                        req.r.rtm_scope = RT_SCOPE_HOST;
1560                else if (req.r.rtm_type == RTN_BROADCAST ||
1561                         req.r.rtm_type == RTN_MULTICAST ||
1562                         req.r.rtm_type == RTN_ANYCAST)
1563                        req.r.rtm_scope = RT_SCOPE_LINK;
1564                else if (req.r.rtm_type == RTN_UNICAST ||
1565                         req.r.rtm_type == RTN_UNSPEC) {
1566                        if (cmd == RTM_DELROUTE)
1567                                req.r.rtm_scope = RT_SCOPE_NOWHERE;
1568                        else if (!gw_ok && !nhs_ok && !nhid)
1569                                req.r.rtm_scope = RT_SCOPE_LINK;
1570                }
1571        }
1572
1573        if (!type_ok && req.r.rtm_family == AF_MPLS)
1574                req.r.rtm_type = RTN_UNICAST;
1575
1576        if (rtnl_talk(&rth, &req.n, NULL) < 0)
1577                return -2;
1578
1579        return 0;
1580}
1581
1582static int iproute_flush_cache(void)
1583{
1584#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1585
1586        int len;
1587        int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1588        char *buffer = "-1";
1589
1590        if (flush_fd < 0) {
1591                fprintf(stderr, "Cannot open \"%s\": %s\n",
1592                                ROUTE_FLUSH_PATH, strerror(errno));
1593                return -1;
1594        }
1595
1596        len = strlen(buffer);
1597
1598        if ((write(flush_fd, (void *)buffer, len)) < len) {
1599                fprintf(stderr, "Cannot flush routing cache\n");
1600                close(flush_fd);
1601                return -1;
1602        }
1603        close(flush_fd);
1604        return 0;
1605}
1606
1607static __u32 route_dump_magic = 0x45311224;
1608
1609static int save_route(struct nlmsghdr *n, void *arg)
1610{
1611        int ret;
1612        int len = n->nlmsg_len;
1613        struct rtmsg *r = NLMSG_DATA(n);
1614        struct rtattr *tb[RTA_MAX+1];
1615        int host_len;
1616
1617        host_len = af_bit_len(r->rtm_family);
1618        len -= NLMSG_LENGTH(sizeof(*r));
1619        parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1620
1621        if (!filter_nlmsg(n, tb, host_len))
1622                return 0;
1623
1624        ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1625        if ((ret > 0) && (ret != n->nlmsg_len)) {
1626                fprintf(stderr, "Short write while saving nlmsg\n");
1627                ret = -EIO;
1628        }
1629
1630        return ret == n->nlmsg_len ? 0 : ret;
1631}
1632
1633static int save_route_prep(void)
1634{
1635        int ret;
1636
1637        if (isatty(STDOUT_FILENO)) {
1638                fprintf(stderr, "Not sending a binary stream to stdout\n");
1639                return -1;
1640        }
1641
1642        ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1643        if (ret != sizeof(route_dump_magic)) {
1644                fprintf(stderr, "Can't write magic to dump file\n");
1645                return -1;
1646        }
1647
1648        return 0;
1649}
1650
1651static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
1652{
1653        struct rtmsg *rtm = NLMSG_DATA(nlh);
1654        int err;
1655
1656        rtm->rtm_protocol = filter.protocol;
1657        if (filter.cloned)
1658                rtm->rtm_flags |= RTM_F_CLONED;
1659
1660        if (filter.tb) {
1661                err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb);
1662                if (err)
1663                        return err;
1664        }
1665
1666        if (filter.oif) {
1667                err = addattr32(nlh, reqlen, RTA_OIF, filter.oif);
1668                if (err)
1669                        return err;
1670        }
1671
1672        return 0;
1673}
1674
1675static int iproute_flush(int family, rtnl_filter_t filter_fn)
1676{
1677        time_t start = time(0);
1678        char flushb[4096-512];
1679        int round = 0;
1680        int ret;
1681
1682        if (filter.cloned) {
1683                if (family != AF_INET6) {
1684                        iproute_flush_cache();
1685                        if (show_stats)
1686                                printf("*** IPv4 routing cache is flushed.\n");
1687                }
1688                if (family == AF_INET)
1689                        return 0;
1690        }
1691
1692        filter.flushb = flushb;
1693        filter.flushp = 0;
1694        filter.flushe = sizeof(flushb);
1695
1696        for (;;) {
1697                if (rtnl_routedump_req(&rth, family, iproute_dump_filter) < 0) {
1698                        perror("Cannot send dump request");
1699                        return -2;
1700                }
1701                filter.flushed = 0;
1702                if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1703                        fprintf(stderr, "Flush terminated\n");
1704                        return -2;
1705                }
1706                if (filter.flushed == 0) {
1707                        if (show_stats) {
1708                                if (round == 0 &&
1709                                    (!filter.cloned || family == AF_INET6))
1710                                        printf("Nothing to flush.\n");
1711                                else
1712                                        printf("*** Flush is complete after %d round%s ***\n",
1713                                               round, round > 1 ? "s" : "");
1714                        }
1715                        fflush(stdout);
1716                        return 0;
1717                }
1718                round++;
1719                ret = flush_update();
1720                if (ret < 0)
1721                        return ret;
1722
1723                if (time(0) - start > 30) {
1724                        printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1725                               (long)(time(0) - start), filter.flushed);
1726                        return -1;
1727                }
1728
1729                if (show_stats) {
1730                        printf("\n*** Round %d, deleting %d entries ***\n",
1731                               round, filter.flushed);
1732                        fflush(stdout);
1733                }
1734        }
1735}
1736
1737static int save_route_errhndlr(struct nlmsghdr *n, void *arg)
1738{
1739        int err = -*(int *)NLMSG_DATA(n);
1740
1741        if (n->nlmsg_type == NLMSG_DONE &&
1742            filter.tb == RT_TABLE_MAIN &&
1743            err == ENOENT)
1744                return RTNL_SUPPRESS_NLMSG_DONE_NLERR;
1745
1746        return RTNL_LET_NLERR;
1747}
1748
1749static int iproute_list_flush_or_save(int argc, char **argv, int action)
1750{
1751        int dump_family = preferred_family;
1752        char *id = NULL;
1753        char *od = NULL;
1754        unsigned int mark = 0;
1755        rtnl_filter_t filter_fn;
1756
1757        if (action == IPROUTE_SAVE) {
1758                if (save_route_prep())
1759                        return -1;
1760
1761                filter_fn = save_route;
1762        } else
1763                filter_fn = print_route;
1764
1765        iproute_reset_filter(0);
1766        filter.tb = RT_TABLE_MAIN;
1767
1768        if ((action == IPROUTE_FLUSH) && argc <= 0) {
1769                fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1770                return -1;
1771        }
1772
1773        while (argc > 0) {
1774                if (matches(*argv, "table") == 0) {
1775                        __u32 tid;
1776
1777                        NEXT_ARG();
1778                        if (rtnl_rttable_a2n(&tid, *argv)) {
1779                                if (strcmp(*argv, "all") == 0) {
1780                                        filter.tb = 0;
1781                                } else if (strcmp(*argv, "cache") == 0) {
1782                                        filter.cloned = 1;
1783                                } else if (strcmp(*argv, "help") == 0) {
1784                                        usage();
1785                                } else {
1786                                        invarg("table id value is invalid\n", *argv);
1787                                }
1788                        } else
1789                                filter.tb = tid;
1790                } else if (matches(*argv, "vrf") == 0) {
1791                        __u32 tid;
1792
1793                        NEXT_ARG();
1794                        tid = ipvrf_get_table(*argv);
1795                        if (tid == 0)
1796                                invarg("Invalid VRF\n", *argv);
1797                        filter.tb = tid;
1798                        filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1799                } else if (matches(*argv, "cached") == 0 ||
1800                           matches(*argv, "cloned") == 0) {
1801                        filter.cloned = 1;
1802                } else if (strcmp(*argv, "tos") == 0 ||
1803                           matches(*argv, "dsfield") == 0) {
1804                        __u32 tos;
1805
1806                        NEXT_ARG();
1807                        if (rtnl_dsfield_a2n(&tos, *argv))
1808                                invarg("TOS value is invalid\n", *argv);
1809                        filter.tos = tos;
1810                        filter.tosmask = -1;
1811                } else if (matches(*argv, "protocol") == 0) {
1812                        __u32 prot = 0;
1813
1814                        NEXT_ARG();
1815                        filter.protocolmask = -1;
1816                        if (rtnl_rtprot_a2n(&prot, *argv)) {
1817                                if (strcmp(*argv, "all") != 0)
1818                                        invarg("invalid \"protocol\"\n", *argv);
1819                                prot = 0;
1820                                filter.protocolmask = 0;
1821                        }
1822                        filter.protocol = prot;
1823                } else if (matches(*argv, "scope") == 0) {
1824                        __u32 scope = 0;
1825
1826                        NEXT_ARG();
1827                        filter.scopemask = -1;
1828                        if (rtnl_rtscope_a2n(&scope, *argv)) {
1829                                if (strcmp(*argv, "all") != 0)
1830                                        invarg("invalid \"scope\"\n", *argv);
1831                                scope = RT_SCOPE_NOWHERE;
1832                                filter.scopemask = 0;
1833                        }
1834                        filter.scope = scope;
1835                } else if (matches(*argv, "type") == 0) {
1836                        int type;
1837
1838                        NEXT_ARG();
1839                        if (rtnl_rtntype_a2n(&type, *argv))
1840                                invarg("node type value is invalid\n", *argv);
1841                        filter.typemask = (1<<type);
1842                } else if (strcmp(*argv, "dev") == 0 ||
1843                           strcmp(*argv, "oif") == 0) {
1844                        NEXT_ARG();
1845                        od = *argv;
1846                } else if (strcmp(*argv, "iif") == 0) {
1847                        NEXT_ARG();
1848                        id = *argv;
1849                } else if (strcmp(*argv, "mark") == 0) {
1850                        NEXT_ARG();
1851                        if (get_unsigned(&mark, *argv, 0))
1852                                invarg("invalid mark value", *argv);
1853                        filter.markmask = -1;
1854                } else if (matches(*argv, "metric") == 0 ||
1855                           matches(*argv, "priority") == 0 ||
1856                           strcmp(*argv, "preference") == 0) {
1857                        __u32 metric;
1858
1859                        NEXT_ARG();
1860                        if (get_u32(&metric, *argv, 0))
1861                                invarg("\"metric\" value is invalid\n", *argv);
1862                        filter.metric = metric;
1863                        filter.metricmask = -1;
1864                } else if (strcmp(*argv, "via") == 0) {
1865                        int family;
1866
1867                        NEXT_ARG();
1868                        family = read_family(*argv);
1869                        if (family == AF_UNSPEC)
1870                                family = dump_family;
1871                        else
1872                                NEXT_ARG();
1873                        get_prefix(&filter.rvia, *argv, family);
1874                } else if (strcmp(*argv, "src") == 0) {
1875                        NEXT_ARG();
1876                        get_prefix(&filter.rprefsrc, *argv, dump_family);
1877                } else if (matches(*argv, "realms") == 0) {
1878                        __u32 realm;
1879
1880                        NEXT_ARG();
1881                        if (get_rt_realms_or_raw(&realm, *argv))
1882                                invarg("invalid realms\n", *argv);
1883                        filter.realm = realm;
1884                        filter.realmmask = ~0U;
1885                        if ((filter.realm&0xFFFF) == 0 &&
1886                            (*argv)[strlen(*argv) - 1] == '/')
1887                                filter.realmmask &= ~0xFFFF;
1888                        if ((filter.realm&0xFFFF0000U) == 0 &&
1889                            (strchr(*argv, '/') == NULL ||
1890                             (*argv)[0] == '/'))
1891                                filter.realmmask &= ~0xFFFF0000U;
1892                } else if (matches(*argv, "from") == 0) {
1893                        NEXT_ARG();
1894                        if (matches(*argv, "root") == 0) {
1895                                NEXT_ARG();
1896                                get_prefix(&filter.rsrc, *argv, dump_family);
1897                        } else if (matches(*argv, "match") == 0) {
1898                                NEXT_ARG();
1899                                get_prefix(&filter.msrc, *argv, dump_family);
1900                        } else {
1901                                if (matches(*argv, "exact") == 0) {
1902                                        NEXT_ARG();
1903                                }
1904                                get_prefix(&filter.msrc, *argv, dump_family);
1905                                filter.rsrc = filter.msrc;
1906                        }
1907                } else {
1908                        if (matches(*argv, "to") == 0) {
1909                                NEXT_ARG();
1910                        }
1911                        if (matches(*argv, "root") == 0) {
1912                                NEXT_ARG();
1913                                get_prefix(&filter.rdst, *argv, dump_family);
1914                        } else if (matches(*argv, "match") == 0) {
1915                                NEXT_ARG();
1916                                get_prefix(&filter.mdst, *argv, dump_family);
1917                        } else {
1918                                if (matches(*argv, "exact") == 0) {
1919                                        NEXT_ARG();
1920                                }
1921                                get_prefix(&filter.mdst, *argv, dump_family);
1922                                filter.rdst = filter.mdst;
1923                        }
1924                }
1925                argc--; argv++;
1926        }
1927
1928        if (dump_family == AF_UNSPEC && filter.tb)
1929                dump_family = AF_INET;
1930
1931        if (id || od)  {
1932                int idx;
1933
1934                if (id) {
1935                        idx = ll_name_to_index(id);
1936                        if (!idx)
1937                                return nodev(id);
1938                        filter.iif = idx;
1939                        filter.iifmask = -1;
1940                }
1941                if (od) {
1942                        idx = ll_name_to_index(od);
1943                        if (!idx)
1944                                return nodev(od);
1945                        filter.oif = idx;
1946                        filter.oifmask = -1;
1947                }
1948        }
1949        filter.mark = mark;
1950
1951        if (action == IPROUTE_FLUSH)
1952                return iproute_flush(dump_family, filter_fn);
1953
1954        if (rtnl_routedump_req(&rth, dump_family, iproute_dump_filter) < 0) {
1955                perror("Cannot send dump request");
1956                return -2;
1957        }
1958
1959        new_json_obj(json);
1960
1961        if (rtnl_dump_filter_errhndlr(&rth, filter_fn, stdout,
1962                                      save_route_errhndlr, NULL) < 0) {
1963                fprintf(stderr, "Dump terminated\n");
1964                return -2;
1965        }
1966
1967        delete_json_obj();
1968        fflush(stdout);
1969        return 0;
1970}
1971
1972
1973static int iproute_get(int argc, char **argv)
1974{
1975        struct {
1976                struct nlmsghdr n;
1977                struct rtmsg            r;
1978                char                    buf[1024];
1979        } req = {
1980                .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1981                .n.nlmsg_flags = NLM_F_REQUEST,
1982                .n.nlmsg_type = RTM_GETROUTE,
1983                .r.rtm_family = preferred_family,
1984        };
1985        char  *idev = NULL;
1986        char  *odev = NULL;
1987        struct nlmsghdr *answer;
1988        int connected = 0;
1989        int fib_match = 0;
1990        int from_ok = 0;
1991        unsigned int mark = 0;
1992        bool address_found = false;
1993
1994        iproute_reset_filter(0);
1995        filter.cloned = 2;
1996
1997        while (argc > 0) {
1998                if (strcmp(*argv, "tos") == 0 ||
1999                    matches(*argv, "dsfield") == 0) {
2000                        __u32 tos;
2001
2002                        NEXT_ARG();
2003                        if (rtnl_dsfield_a2n(&tos, *argv))
2004                                invarg("TOS value is invalid\n", *argv);
2005                        req.r.rtm_tos = tos;
2006                } else if (matches(*argv, "from") == 0) {
2007                        inet_prefix addr;
2008
2009                        NEXT_ARG();
2010                        if (matches(*argv, "help") == 0)
2011                                usage();
2012                        from_ok = 1;
2013                        get_prefix(&addr, *argv, req.r.rtm_family);
2014                        if (req.r.rtm_family == AF_UNSPEC)
2015                                req.r.rtm_family = addr.family;
2016                        if (addr.bytelen)
2017                                addattr_l(&req.n, sizeof(req), RTA_SRC,
2018                                          &addr.data, addr.bytelen);
2019                        req.r.rtm_src_len = addr.bitlen;
2020                } else if (matches(*argv, "iif") == 0) {
2021                        NEXT_ARG();
2022                        idev = *argv;
2023                } else if (matches(*argv, "mark") == 0) {
2024                        NEXT_ARG();
2025                        if (get_unsigned(&mark, *argv, 0))
2026                                invarg("invalid mark value", *argv);
2027                } else if (matches(*argv, "oif") == 0 ||
2028                           strcmp(*argv, "dev") == 0) {
2029                        NEXT_ARG();
2030                        odev = *argv;
2031                } else if (matches(*argv, "notify") == 0) {
2032                        req.r.rtm_flags |= RTM_F_NOTIFY;
2033                } else if (matches(*argv, "connected") == 0) {
2034                        connected = 1;
2035                } else if (matches(*argv, "vrf") == 0) {
2036                        NEXT_ARG();
2037                        if (!name_is_vrf(*argv))
2038                                invarg("Invalid VRF\n", *argv);
2039                        odev = *argv;
2040                } else if (matches(*argv, "uid") == 0) {
2041                        uid_t uid;
2042
2043                        NEXT_ARG();
2044                        if (get_unsigned(&uid, *argv, 0))
2045                                invarg("invalid UID\n", *argv);
2046                        addattr32(&req.n, sizeof(req), RTA_UID, uid);
2047                } else if (matches(*argv, "fibmatch") == 0) {
2048                        fib_match = 1;
2049                } else if (strcmp(*argv, "as") == 0) {
2050                        inet_prefix addr;
2051
2052                        NEXT_ARG();
2053                        if (strcmp(*argv, "to") == 0)
2054                                NEXT_ARG();
2055                        get_addr(&addr, *argv, req.r.rtm_family);
2056                        if (req.r.rtm_family == AF_UNSPEC)
2057                                req.r.rtm_family = addr.family;
2058                        addattr_l(&req.n, sizeof(req), RTA_NEWDST,
2059                                  &addr.data, addr.bytelen);
2060                } else if (matches(*argv, "sport") == 0) {
2061                        __be16 sport;
2062
2063                        NEXT_ARG();
2064                        if (get_be16(&sport, *argv, 0))
2065                                invarg("invalid sport\n", *argv);
2066                        addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
2067                } else if (matches(*argv, "dport") == 0) {
2068                        __be16 dport;
2069
2070                        NEXT_ARG();
2071                        if (get_be16(&dport, *argv, 0))
2072                                invarg("invalid dport\n", *argv);
2073                        addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
2074                } else if (matches(*argv, "ipproto") == 0) {
2075                        int ipproto;
2076
2077                        NEXT_ARG();
2078                        ipproto = inet_proto_a2n(*argv);
2079                        if (ipproto < 0)
2080                                invarg("Invalid \"ipproto\" value\n",
2081                                       *argv);
2082                        addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
2083                } else {
2084                        inet_prefix addr;
2085
2086                        if (strcmp(*argv, "to") == 0) {
2087                                NEXT_ARG();
2088                        }
2089                        if (matches(*argv, "help") == 0)
2090                                usage();
2091                        get_prefix(&addr, *argv, req.r.rtm_family);
2092                        if (req.r.rtm_family == AF_UNSPEC)
2093                                req.r.rtm_family = addr.family;
2094                        if (addr.bytelen)
2095                                addattr_l(&req.n, sizeof(req),
2096                                          RTA_DST, &addr.data, addr.bytelen);
2097                        if (req.r.rtm_family == AF_INET && addr.bitlen != 32) {
2098                                fprintf(stderr,
2099                                        "Warning: /%u as prefix is invalid, only /32 (or none) is supported.\n",
2100                                        addr.bitlen);
2101                                req.r.rtm_dst_len = 32;
2102                        } else if (req.r.rtm_family == AF_INET6 && addr.bitlen != 128) {
2103                                fprintf(stderr,
2104                                        "Warning: /%u as prefix is invalid, only /128 (or none) is supported.\n",
2105                                        addr.bitlen);
2106                                req.r.rtm_dst_len = 128;
2107                        } else
2108                                req.r.rtm_dst_len = addr.bitlen;
2109                        address_found = true;
2110                }
2111                argc--; argv++;
2112        }
2113
2114        if (!address_found) {
2115                fprintf(stderr, "need at least a destination address\n");
2116                return -1;
2117        }
2118
2119        if (idev || odev)  {
2120                int idx;
2121
2122                if (idev) {
2123                        idx = ll_name_to_index(idev);
2124                        if (!idx)
2125                                return nodev(idev);
2126                        addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2127                }
2128                if (odev) {
2129                        idx = ll_name_to_index(odev);
2130                        if (!idx)
2131                                return nodev(odev);
2132                        addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2133                }
2134        }
2135        if (mark)
2136                addattr32(&req.n, sizeof(req), RTA_MARK, mark);
2137
2138        if (req.r.rtm_family == AF_UNSPEC)
2139                req.r.rtm_family = AF_INET;
2140
2141        /* Only IPv4 supports the RTM_F_LOOKUP_TABLE flag */
2142        if (req.r.rtm_family == AF_INET)
2143                req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
2144        if (fib_match)
2145                req.r.rtm_flags |= RTM_F_FIB_MATCH;
2146
2147        if (rtnl_talk(&rth, &req.n, &answer) < 0)
2148                return -2;
2149
2150        new_json_obj(json);
2151
2152        if (connected && !from_ok) {
2153                struct rtmsg *r = NLMSG_DATA(answer);
2154                int len = answer->nlmsg_len;
2155                struct rtattr *tb[RTA_MAX+1];
2156
2157                if (print_route(answer, (void *)stdout) < 0) {
2158                        fprintf(stderr, "An error :-)\n");
2159                        free(answer);
2160                        return -1;
2161                }
2162
2163                if (answer->nlmsg_type != RTM_NEWROUTE) {
2164                        fprintf(stderr, "Not a route?\n");
2165                        free(answer);
2166                        return -1;
2167                }
2168                len -= NLMSG_LENGTH(sizeof(*r));
2169                if (len < 0) {
2170                        fprintf(stderr, "Wrong len %d\n", len);
2171                        free(answer);
2172                        return -1;
2173                }
2174
2175                parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2176
2177                if (tb[RTA_PREFSRC]) {
2178                        tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2179                        r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2180                } else if (!tb[RTA_SRC]) {
2181                        fprintf(stderr, "Failed to connect the route\n");
2182                        free(answer);
2183                        return -1;
2184                }
2185                if (!odev && tb[RTA_OIF])
2186                        tb[RTA_OIF]->rta_type = 0;
2187                if (tb[RTA_GATEWAY])
2188                        tb[RTA_GATEWAY]->rta_type = 0;
2189                if (tb[RTA_VIA])
2190                        tb[RTA_VIA]->rta_type = 0;
2191                if (!idev && tb[RTA_IIF])
2192                        tb[RTA_IIF]->rta_type = 0;
2193                req.n.nlmsg_flags = NLM_F_REQUEST;
2194                req.n.nlmsg_type = RTM_GETROUTE;
2195
2196                delete_json_obj();
2197                free(answer);
2198                if (rtnl_talk(&rth, &req.n, &answer) < 0)
2199                        return -2;
2200        }
2201
2202        if (print_route(answer, (void *)stdout) < 0) {
2203                fprintf(stderr, "An error :-)\n");
2204                free(answer);
2205                return -1;
2206        }
2207
2208        delete_json_obj();
2209        free(answer);
2210        return 0;
2211}
2212
2213static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
2214{
2215        if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2216                return 1;
2217
2218        return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2219}
2220
2221static int restore_handler(struct rtnl_ctrl_data *ctrl,
2222                           struct nlmsghdr *n, void *arg)
2223{
2224        struct rtmsg *r = NLMSG_DATA(n);
2225        struct rtattr *tb[RTA_MAX+1];
2226        int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2227        int ret, prio = *(int *)arg;
2228
2229        parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2230
2231        /* Restore routes in correct order:
2232         * 0. ones for local addresses,
2233         * 1. ones for local networks,
2234         * 2. others (remote networks/hosts).
2235         */
2236        if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2237            !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2238                goto restore;
2239        else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
2240                 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2241                goto restore;
2242        else if (prio == 2 && tb[RTA_GATEWAY])
2243                goto restore;
2244
2245        return 0;
2246
2247restore:
2248        n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2249
2250        ll_init_map(&rth);
2251
2252        ret = rtnl_talk(&rth, n, NULL);
2253        if ((ret < 0) && (errno == EEXIST))
2254                ret = 0;
2255
2256        return ret;
2257}
2258
2259static int route_dump_check_magic(void)
2260{
2261        int ret;
2262        __u32 magic = 0;
2263
2264        if (isatty(STDIN_FILENO)) {
2265                fprintf(stderr, "Can't restore route dump from a terminal\n");
2266                return -1;
2267        }
2268
2269        ret = fread(&magic, sizeof(magic), 1, stdin);
2270        if (magic != route_dump_magic) {
2271                fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2272                return -1;
2273        }
2274
2275        return 0;
2276}
2277
2278static int iproute_restore(void)
2279{
2280        int pos, prio;
2281
2282        if (route_dump_check_magic())
2283                return -1;
2284
2285        pos = ftell(stdin);
2286        if (pos == -1) {
2287                perror("Failed to restore: ftell");
2288                return -1;
2289        }
2290
2291        for (prio = 0; prio < 3; prio++) {
2292                int err;
2293
2294                err = rtnl_from_file(stdin, &restore_handler, &prio);
2295                if (err)
2296                        return -2;
2297
2298                if (fseek(stdin, pos, SEEK_SET) == -1) {
2299                        perror("Failed to restore: fseek");
2300                        return -1;
2301                }
2302        }
2303
2304        return 0;
2305}
2306
2307static int show_handler(struct rtnl_ctrl_data *ctrl,
2308                        struct nlmsghdr *n, void *arg)
2309{
2310        print_route(n, stdout);
2311        return 0;
2312}
2313
2314static int iproute_showdump(void)
2315{
2316        if (route_dump_check_magic())
2317                return -1;
2318
2319        if (rtnl_from_file(stdin, &show_handler, NULL))
2320                return -2;
2321
2322        return 0;
2323}
2324
2325void iproute_reset_filter(int ifindex)
2326{
2327        memset(&filter, 0, sizeof(filter));
2328        filter.mdst.bitlen = -1;
2329        filter.msrc.bitlen = -1;
2330        filter.oif = ifindex;
2331        if (filter.oif > 0)
2332                filter.oifmask = -1;
2333}
2334
2335int do_iproute(int argc, char **argv)
2336{
2337        if (argc < 1)
2338                return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2339
2340        if (matches(*argv, "add") == 0)
2341                return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2342                                      argc-1, argv+1);
2343        if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2344                return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2345                                      argc-1, argv+1);
2346        if (matches(*argv, "replace") == 0)
2347                return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2348                                      argc-1, argv+1);
2349        if (matches(*argv, "prepend") == 0)
2350                return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2351                                      argc-1, argv+1);
2352        if (matches(*argv, "append") == 0)
2353                return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2354                                      argc-1, argv+1);
2355        if (matches(*argv, "test") == 0)
2356                return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2357                                      argc-1, argv+1);
2358        if (matches(*argv, "delete") == 0)
2359                return iproute_modify(RTM_DELROUTE, 0,
2360                                      argc-1, argv+1);
2361        if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2362            || matches(*argv, "lst") == 0)
2363                return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2364        if (matches(*argv, "get") == 0)
2365                return iproute_get(argc-1, argv+1);
2366        if (matches(*argv, "flush") == 0)
2367                return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2368        if (matches(*argv, "save") == 0)
2369                return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2370        if (matches(*argv, "restore") == 0)
2371                return iproute_restore();
2372        if (matches(*argv, "showdump") == 0)
2373                return iproute_showdump();
2374        if (matches(*argv, "help") == 0)
2375                usage();
2376
2377        fprintf(stderr,
2378                "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2379        exit(-1);
2380}
2381