diff options
Diffstat (limited to 'ip/iproute.c')
-rw-r--r-- | ip/iproute.c | 1410 |
1 files changed, 1410 insertions, 0 deletions
diff --git a/ip/iproute.c b/ip/iproute.c index e69de29b..404f8e0e 100644 --- a/ip/iproute.c +++ b/ip/iproute.c @@ -0,0 +1,1410 @@ +/* + * iproute.c "ip route". + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> + * + * + * Changes: + * + * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses + * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <syslog.h> +#include <fcntl.h> +#include <string.h> +#include <sys/time.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <netinet/ip.h> +#include <arpa/inet.h> +#include <linux/in_route.h> + +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" + +#ifndef RTAX_RTTVAR +#define RTAX_RTTVAR RTAX_HOPS +#endif + + +static void usage(void) __attribute__((noreturn)); + +static void usage(void) +{ + fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n"); + fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n"); + fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n"); + fprintf(stderr, " ip route { add | del | change | append | replace | monitor } ROUTE\n"); + fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"); + fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n"); + fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n"); + fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"); + fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"); + fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n"); + fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n"); + fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"); + fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"); + fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n"); + fprintf(stderr, " [ rtt NUMBER ] [ rttvar NUMBER ]\n"); + fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ ssthresh REALM ]\n"); + fprintf(stderr, " [ realms REALM ]\n"); + fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n"); + fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n"); + fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n"); + fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n"); + fprintf(stderr, "FLAGS := [ equalize ]\n"); + fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n"); + fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n"); + exit(-1); +} + + +static struct +{ + int tb; + int flushed; + char *flushb; + int flushp; + int flushe; + struct rtnl_handle *rth; + int protocol, protocolmask; + int scope, scopemask; + int type, typemask; + int tos, tosmask; + int iif, iifmask; + int oif, oifmask; + int realm, realmmask; + inet_prefix rprefsrc; + inet_prefix rvia; + inet_prefix rdst; + inet_prefix mdst; + inet_prefix rsrc; + inet_prefix msrc; +} filter; + +static int flush_update(void) +{ + if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) { + perror("Failed to send flush request\n"); + return -1; + } + filter.flushp = 0; + return 0; +} + +int print_route(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) +{ + FILE *fp = (FILE*)arg; + struct rtmsg *r = NLMSG_DATA(n); + int len = n->nlmsg_len; + struct rtattr * tb[RTA_MAX+1]; + char abuf[256]; + inet_prefix dst; + inet_prefix src; + inet_prefix prefsrc; + inet_prefix via; + int host_len = -1; + SPRINT_BUF(b1); + + + if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) { + fprintf(stderr, "Not a route: %08x %08x %08x\n", + n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); + return 0; + } + if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE) + return 0; + len -= NLMSG_LENGTH(sizeof(*r)); + if (len < 0) { + fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); + return -1; + } + + if (r->rtm_family == AF_INET6) + host_len = 128; + else if (r->rtm_family == AF_INET) + host_len = 32; + else if (r->rtm_family == AF_DECnet) + host_len = 16; + else if (r->rtm_family == AF_IPX) + host_len = 80; + + if (r->rtm_family == AF_INET6) { + if (filter.tb) { + if (filter.tb < 0) { + if (!(r->rtm_flags&RTM_F_CLONED)) + return 0; + } else { + if (r->rtm_flags&RTM_F_CLONED) + return 0; + if (filter.tb == RT_TABLE_LOCAL) { + if (r->rtm_type != RTN_LOCAL) + return 0; + } else if (filter.tb == RT_TABLE_MAIN) { + if (r->rtm_type == RTN_LOCAL) + return 0; + } else { + return 0; + } + } + } + } else { + if (filter.tb > 0 && filter.tb != r->rtm_table) + return 0; + } + if ((filter.protocol^r->rtm_protocol)&filter.protocolmask) + return 0; + if ((filter.scope^r->rtm_scope)&filter.scopemask) + return 0; + if ((filter.type^r->rtm_type)&filter.typemask) + return 0; + if ((filter.tos^r->rtm_tos)&filter.tosmask) + return 0; + if (filter.rdst.family && + (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) + return 0; + if (filter.mdst.family && + (r->rtm_family != filter.mdst.family || + (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) + return 0; + if (filter.rsrc.family && + (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) + return 0; + if (filter.msrc.family && + (r->rtm_family != filter.msrc.family || + (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) + return 0; + if (filter.rvia.family && r->rtm_family != filter.rvia.family) + return 0; + if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family) + return 0; + + + memset(tb, 0, sizeof(tb)); + parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); + + memset(&dst, 0, sizeof(dst)); + dst.family = r->rtm_family; + if (tb[RTA_DST]) + memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8); + if (filter.rsrc.family || filter.msrc.family) { + memset(&src, 0, sizeof(src)); + src.family = r->rtm_family; + if (tb[RTA_SRC]) + memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8); + } + if (filter.rvia.bitlen>0) { + memset(&via, 0, sizeof(via)); + via.family = r->rtm_family; + if (tb[RTA_GATEWAY]) + memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len); + } + if (filter.rprefsrc.bitlen>0) { + memset(&prefsrc, 0, sizeof(prefsrc)); + prefsrc.family = r->rtm_family; + if (tb[RTA_PREFSRC]) + memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len); + } + + if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen)) + return 0; + if (filter.mdst.family && filter.mdst.bitlen >= 0 && + inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len)) + return 0; + + if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen)) + return 0; + if (filter.msrc.family && filter.msrc.bitlen >= 0 && + inet_addr_match(&src, &filter.msrc, r->rtm_src_len)) + return 0; + + if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen)) + return 0; + if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen)) + return 0; + if (filter.realmmask) { + __u32 realms = 0; + if (tb[RTA_FLOW]) + realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]); + if ((realms^filter.realm)&filter.realmmask) + return 0; + } + if (filter.iifmask) { + int iif = 0; + if (tb[RTA_IIF]) + iif = *(int*)RTA_DATA(tb[RTA_IIF]); + if ((iif^filter.iif)&filter.iifmask) + return 0; + } + if (filter.oifmask) { + int oif = 0; + if (tb[RTA_OIF]) + oif = *(int*)RTA_DATA(tb[RTA_OIF]); + if ((oif^filter.oif)&filter.oifmask) + return 0; + } + if (filter.flushb && + r->rtm_family == AF_INET6 && + r->rtm_dst_len == 0 && + r->rtm_type == RTN_UNREACHABLE && + tb[RTA_PRIORITY] && + *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1) + return 0; + + if (filter.flushb) { + struct nlmsghdr *fn; + if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) { + if (flush_update()) + return -1; + } + fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp)); + memcpy(fn, n, n->nlmsg_len); + fn->nlmsg_type = RTM_DELROUTE; + fn->nlmsg_flags = NLM_F_REQUEST; + fn->nlmsg_seq = ++filter.rth->seq; + filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb; + filter.flushed++; + if (show_stats < 2) + return 0; + } + + if (n->nlmsg_type == RTM_DELROUTE) + fprintf(fp, "Deleted "); + if (r->rtm_type != RTN_UNICAST && !filter.type) + fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1))); + + if (tb[RTA_DST]) { + if (r->rtm_dst_len != host_len) { + fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family, + RTA_PAYLOAD(tb[RTA_DST]), + RTA_DATA(tb[RTA_DST]), + abuf, sizeof(abuf)), + r->rtm_dst_len + ); + } else { + fprintf(fp, "%s ", format_host(r->rtm_family, + RTA_PAYLOAD(tb[RTA_DST]), + RTA_DATA(tb[RTA_DST]), + abuf, sizeof(abuf)) + ); + } + } else if (r->rtm_dst_len) { + fprintf(fp, "0/%d ", r->rtm_dst_len); + } else { + fprintf(fp, "default "); + } + if (tb[RTA_SRC]) { + if (r->rtm_src_len != host_len) { + fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family, + RTA_PAYLOAD(tb[RTA_SRC]), + RTA_DATA(tb[RTA_SRC]), + abuf, sizeof(abuf)), + r->rtm_src_len + ); + } else { + fprintf(fp, "from %s ", format_host(r->rtm_family, + RTA_PAYLOAD(tb[RTA_SRC]), + RTA_DATA(tb[RTA_SRC]), + abuf, sizeof(abuf)) + ); + } + } else if (r->rtm_src_len) { + fprintf(fp, "from 0/%u ", r->rtm_src_len); + } + if (r->rtm_tos && filter.tosmask != -1) { + SPRINT_BUF(b1); + fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1))); + } + if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) { + fprintf(fp, "via %s ", + format_host(r->rtm_family, + RTA_PAYLOAD(tb[RTA_GATEWAY]), + RTA_DATA(tb[RTA_GATEWAY]), + abuf, sizeof(abuf))); + } + if (tb[RTA_OIF] && filter.oifmask != -1) + fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF]))); + + if (!(r->rtm_flags&RTM_F_CLONED)) { + if (r->rtm_table != RT_TABLE_MAIN && !filter.tb) + fprintf(fp, " table %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1))); + if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1) + fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1))); + if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1) + fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1))); + } + if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) { + /* Do not use format_host(). It is our local addr + and symbolic name will not be useful. + */ + fprintf(fp, " src %s ", + rt_addr_n2a(r->rtm_family, + RTA_PAYLOAD(tb[RTA_PREFSRC]), + RTA_DATA(tb[RTA_PREFSRC]), + abuf, sizeof(abuf))); + } + if (tb[RTA_PRIORITY]) + fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY])); + if (r->rtm_flags & RTNH_F_DEAD) + fprintf(fp, "dead "); + if (r->rtm_flags & RTNH_F_ONLINK) + fprintf(fp, "onlink "); + if (r->rtm_flags & RTNH_F_PERVASIVE) + fprintf(fp, "pervasive "); + if (r->rtm_flags & RTM_F_EQUALIZE) + fprintf(fp, "equalize "); + if (r->rtm_flags & RTM_F_NOTIFY) + fprintf(fp, "notify "); + + if (tb[RTA_FLOW] && filter.realmmask != ~0U) { + __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]); + __u32 from = to>>16; + to &= 0xFFFF; + fprintf(fp, "realm%s ", from ? "s" : ""); + if (from) { + fprintf(fp, "%s/", + rtnl_rtrealm_n2a(from, b1, sizeof(b1))); + } + fprintf(fp, "%s ", + rtnl_rtrealm_n2a(to, b1, sizeof(b1))); + } + if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) { + __u32 flags = r->rtm_flags&~0xFFFF; + int first = 1; + + fprintf(fp, "%s cache ", _SL_); + +#define PRTFL(fl,flname) if (flags&RTCF_##fl) { \ + flags &= ~RTCF_##fl; \ + fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \ + first = 0; } + PRTFL(LOCAL, "local"); + PRTFL(REJECT, "reject"); + PRTFL(MULTICAST, "mc"); + PRTFL(BROADCAST, "brd"); + PRTFL(DNAT, "dst-nat"); + PRTFL(SNAT, "src-nat"); + PRTFL(MASQ, "masq"); + PRTFL(DIRECTDST, "dst-direct"); + PRTFL(DIRECTSRC, "src-direct"); + PRTFL(REDIRECTED, "redirected"); + PRTFL(DOREDIRECT, "redirect"); + PRTFL(FAST, "fastroute"); + PRTFL(NOTIFY, "notify"); + PRTFL(TPROXY, "proxy"); +#ifdef RTCF_EQUALIZE + PRTFL(EQUALIZE, "equalize"); +#endif + if (flags) + fprintf(fp, "%s%x> ", first ? "<" : "", flags); + if (tb[RTA_CACHEINFO]) { + struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]); + static int hz; + if (!hz) + hz = get_hz(); + if (ci->rta_expires != 0) + fprintf(fp, " expires %dsec", ci->rta_expires/hz); + if (ci->rta_error != 0) + fprintf(fp, " error %d", ci->rta_error); + if (show_stats) { + if (ci->rta_clntref) + fprintf(fp, " users %d", ci->rta_clntref); + if (ci->rta_used != 0) + fprintf(fp, " used %d", ci->rta_used); + if (ci->rta_lastuse != 0) + fprintf(fp, " age %dsec", ci->rta_lastuse/hz); + } +#ifdef RTNETLINK_HAVE_PEERINFO + if (ci->rta_id) + fprintf(fp, " ipid 0x%04x", ci->rta_id); + if (ci->rta_ts || ci->rta_tsage) + fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage); +#endif + } + } else if (r->rtm_family == AF_INET6) { + struct rta_cacheinfo *ci = NULL; + if (tb[RTA_CACHEINFO]) + ci = RTA_DATA(tb[RTA_CACHEINFO]); + if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) { + static int hz; + if (!hz) + hz = get_hz(); + if (r->rtm_flags & RTM_F_CLONED) + fprintf(fp, "%s cache ", _SL_); + if (ci->rta_expires) + fprintf(fp, " expires %dsec", ci->rta_expires/hz); + if (ci->rta_error != 0) + fprintf(fp, " error %d", ci->rta_error); + if (show_stats) { + if (ci->rta_clntref) + fprintf(fp, " users %d", ci->rta_clntref); + if (ci->rta_used != 0) + fprintf(fp, " used %d", ci->rta_used); + if (ci->rta_lastuse != 0) + fprintf(fp, " age %dsec", ci->rta_lastuse/hz); + } + } else if (ci) { + if (ci->rta_error != 0) + fprintf(fp, " error %d", ci->rta_error); + } + } + if (tb[RTA_METRICS]) { + int i; + unsigned mxlock = 0; + struct rtattr *mxrta[RTAX_MAX+1]; + + memset(mxrta, 0, sizeof(mxrta)); + + parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), + RTA_PAYLOAD(tb[RTA_METRICS])); + if (mxrta[RTAX_LOCK]) + mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]); + + for (i=2; i<=RTAX_MAX; i++) { + static char *mx_names[] = + { + "mtu", + "window", + "rtt", + "rttvar", + "ssthresh", + "cwnd", + "advmss", + "reordering", + }; + static int hz; + if (mxrta[i] == NULL) + continue; + if (!hz) + hz = get_hz(); + if (i-2 < sizeof(mx_names)/sizeof(char*)) + fprintf(fp, " %s", mx_names[i-2]); + else + fprintf(fp, " metric%d", i); + if (mxlock & (1<<i)) + fprintf(fp, " lock"); + + if (i != RTAX_RTT && i != RTAX_RTTVAR) + fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i])); + else { + unsigned val = *(unsigned*)RTA_DATA(mxrta[i]); + + val *= 1000; + if (i == RTAX_RTT) + val /= 8; + else + val /= 4; + if (val >= hz) + fprintf(fp, " %ums", val/hz); + else + fprintf(fp, " %.2fms", (float)val/hz); + } + } + } + if (tb[RTA_IIF] && filter.iifmask != -1) { + fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF]))); + } + if (tb[RTA_MULTIPATH]) { + struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]); + int first = 0; + + len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); + + for (;;) { + if (len < sizeof(*nh)) + break; + if (nh->rtnh_len > len) + break; + if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) { + if (first) + fprintf(fp, " Oifs:"); + else + fprintf(fp, " "); + } else + fprintf(fp, "%s\tnexthop", _SL_); + if (nh->rtnh_len > sizeof(*nh)) { + memset(tb, 0, sizeof(tb)); + parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh)); + if (tb[RTA_GATEWAY]) { + fprintf(fp, " via %s ", + format_host(r->rtm_family, + RTA_PAYLOAD(tb[RTA_GATEWAY]), + RTA_DATA(tb[RTA_GATEWAY]), + abuf, sizeof(abuf))); + } + } + if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) { + fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex)); + if (nh->rtnh_hops != 1) + fprintf(fp, "(ttl>%d)", nh->rtnh_hops); + } else { + fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex)); + fprintf(fp, " weight %d", nh->rtnh_hops+1); + } + if (nh->rtnh_flags & RTNH_F_DEAD) + fprintf(fp, " dead"); + if (nh->rtnh_flags & RTNH_F_ONLINK) + fprintf(fp, " onlink"); + if (nh->rtnh_flags & RTNH_F_PERVASIVE) + fprintf(fp, " pervasive"); + len -= NLMSG_ALIGN(nh->rtnh_len); + nh = RTNH_NEXT(nh); + } + } + fprintf(fp, "\n"); + fflush(fp); + return 0; +} + + +int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp) +{ + int argc = *argcp; + char **argv = *argvp; + + while (++argv, --argc > 0) { + if (strcmp(*argv, "via") == 0) { + NEXT_ARG(); + rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv)); + rtnh->rtnh_len += sizeof(struct rtattr) + 4; + } else if (strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) { + fprintf(stderr, "Cannot find device \"%s\"\n", *argv); + exit(1); + } + } else if (strcmp(*argv, "weight") == 0) { + unsigned w; + NEXT_ARG(); + if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256) + invarg("\"weight\" is invalid\n", *argv); + rtnh->rtnh_hops = w - 1; + } else if (strcmp(*argv, "onlink") == 0) { + rtnh->rtnh_flags |= RTNH_F_ONLINK; + } else + break; + } + *argcp = argc; + *argvp = argv; + return 0; +} + +int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv) +{ + char buf[1024]; + struct rtattr *rta = (void*)buf; + struct rtnexthop *rtnh; + + rta->rta_type = RTA_MULTIPATH; + rta->rta_len = RTA_LENGTH(0); + rtnh = RTA_DATA(rta); + + while (argc > 0) { + if (strcmp(*argv, "nexthop") != 0) { + fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv); + exit(-1); + } + if (argc <= 1) { + fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n"); + exit(-1); + } + memset(rtnh, 0, sizeof(*rtnh)); + rtnh->rtnh_len = sizeof(*rtnh); + rta->rta_len += rtnh->rtnh_len; + parse_one_nh(rta, rtnh, &argc, &argv); + rtnh = RTNH_NEXT(rtnh); + } + + if (rta->rta_len > RTA_LENGTH(0)) + addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta)); + return 0; +} + + +int iproute_modify(int cmd, unsigned flags, int argc, char **argv) +{ + struct rtnl_handle rth; + struct { + struct nlmsghdr n; + struct rtmsg r; + char buf[1024]; + } req; + char mxbuf[256]; + struct rtattr * mxrta = (void*)mxbuf; + unsigned mxlock = 0; + char *d = NULL; + int gw_ok = 0; + int dst_ok = 0; + int nhs_ok = 0; + int scope_ok = 0; + int table_ok = 0; + int proto_ok = 0; + int type_ok = 0; + + memset(&req, 0, sizeof(req)); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); + req.n.nlmsg_flags = NLM_F_REQUEST|flags; + req.n.nlmsg_type = cmd; + req.r.rtm_family = preferred_family; + req.r.rtm_table = RT_TABLE_MAIN; + req.r.rtm_scope = RT_SCOPE_NOWHERE; + + if (cmd != RTM_DELROUTE) { + req.r.rtm_protocol = RTPROT_BOOT; + req.r.rtm_scope = RT_SCOPE_UNIVERSE; + req.r.rtm_type = RTN_UNICAST; + } + + mxrta->rta_type = RTA_METRICS; + mxrta->rta_len = RTA_LENGTH(0); + + while (argc > 0) { + if (strcmp(*argv, "src") == 0) { + inet_prefix addr; + NEXT_ARG(); + get_addr(&addr, *argv, req.r.rtm_family); + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = addr.family; + addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen); + } else if (strcmp(*argv, "via") == 0) { + inet_prefix addr; + gw_ok = 1; + NEXT_ARG(); + get_addr(&addr, *argv, req.r.rtm_family); + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = addr.family; + addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen); + } else if (strcmp(*argv, "from") == 0) { + inet_prefix addr; + NEXT_ARG(); + get_prefix(&addr, *argv, req.r.rtm_family); + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = addr.family; + if (addr.bytelen) + addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); + req.r.rtm_src_len = addr.bitlen; + } else if (strcmp(*argv, "tos") == 0 || + matches(*argv, "dsfield") == 0) { + __u32 tos; + NEXT_ARG(); + if (rtnl_dsfield_a2n(&tos, *argv)) + invarg("\"tos\" value is invalid\n", *argv); + req.r.rtm_tos = tos; + } else if (matches(*argv, "metric") == 0 || + matches(*argv, "priority") == 0 || + matches(*argv, "preference") == 0) { + __u32 metric; + NEXT_ARG(); + if (get_u32(&metric, *argv, 0)) + invarg("\"metric\" value is invalid\n", *argv); + addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric); + } else if (strcmp(*argv, "scope") == 0) { + int scope = 0; + NEXT_ARG(); + if (rtnl_rtscope_a2n(&scope, *argv)) + invarg("invalid \"scope\" value\n", *argv); + req.r.rtm_scope = scope; + scope_ok = 1; + } else if (strcmp(*argv, "mtu") == 0) { + unsigned mtu; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_MTU); + NEXT_ARG(); + } + if (get_unsigned(&mtu, *argv, 0)) + invarg("\"mtu\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu); +#ifdef RTAX_ADVMSS + } else if (strcmp(*argv, "advmss") == 0) { + unsigned mss; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_ADVMSS); + NEXT_ARG(); + } + if (get_unsigned(&mss, *argv, 0)) + invarg("\"mss\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss); +#endif +#ifdef RTAX_REORDERING + } else if (matches(*argv, "reordering") == 0) { + unsigned reord; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_REORDERING); + NEXT_ARG(); + } + if (get_unsigned(&reord, *argv, 0)) + invarg("\"reordering\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord); +#endif + } else if (strcmp(*argv, "rtt") == 0) { + unsigned rtt; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_RTT); + NEXT_ARG(); + } + if (get_unsigned(&rtt, *argv, 0)) + invarg("\"rtt\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, rtt); + } else if (matches(*argv, "window") == 0) { + unsigned win; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_WINDOW); + NEXT_ARG(); + } + if (get_unsigned(&win, *argv, 0)) + invarg("\"window\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win); + } else if (matches(*argv, "cwnd") == 0) { + unsigned win; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_CWND); + NEXT_ARG(); + } + if (get_unsigned(&win, *argv, 0)) + invarg("\"cwnd\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win); + } else if (matches(*argv, "rttvar") == 0) { + unsigned win; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_RTTVAR); + NEXT_ARG(); + } + if (get_unsigned(&win, *argv, 0)) + invarg("\"rttvar\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, win); + } else if (matches(*argv, "ssthresh") == 0) { + unsigned win; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<<RTAX_SSTHRESH); + NEXT_ARG(); + } + if (get_unsigned(&win, *argv, 0)) + invarg("\"ssthresh\" value is invalid\n", *argv); + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win); + } else if (matches(*argv, "realms") == 0) { + __u32 realm; + NEXT_ARG(); + if (get_rt_realms(&realm, *argv)) + invarg("\"realm\" value is invalid\n", *argv); + addattr32(&req.n, sizeof(req), RTA_FLOW, realm); + } else if (strcmp(*argv, "onlink") == 0) { + req.r.rtm_flags |= RTNH_F_ONLINK; + } else if (matches(*argv, "equalize") == 0 || + strcmp(*argv, "eql") == 0) { + req.r.rtm_flags |= RTM_F_EQUALIZE; + } else if (strcmp(*argv, "nexthop") == 0) { + nhs_ok = 1; + break; + } else if (matches(*argv, "protocol") == 0) { + int prot; + NEXT_ARG(); + if (rtnl_rtprot_a2n(&prot, *argv)) + invarg("\"protocol\" value is invalid\n", *argv); + req.r.rtm_protocol = prot; + proto_ok =1; + } else if (matches(*argv, "table") == 0) { + int tid; + NEXT_ARG(); + if (rtnl_rttable_a2n(&tid, *argv)) + invarg("\"table\" value is invalid\n", *argv); + req.r.rtm_table = tid; + table_ok = 1; + } else if (strcmp(*argv, "dev") == 0 || + strcmp(*argv, "oif") == 0) { + NEXT_ARG(); + d = *argv; + } else { + int type; + inet_prefix dst; + + if (strcmp(*argv, "to") == 0) { + NEXT_ARG(); + } + if ((**argv < '0' || **argv > '9') && + rtnl_rtntype_a2n(&type, *argv) == 0) { + NEXT_ARG(); + req.r.rtm_type = type; + type_ok = 1; + } + + if (matches(*argv, "help") == 0) + usage(); + if (dst_ok) + duparg2("to", *argv); + get_prefix(&dst, *argv, req.r.rtm_family); + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = dst.family; + req.r.rtm_dst_len = dst.bitlen; + dst_ok = 1; + if (dst.bytelen) + addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen); + } + argc--; argv++; + } + + if (rtnl_open(&rth, 0) < 0) + exit(1); + + if (d || nhs_ok) { + int idx; + + ll_init_map(&rth); + + if (d) { + if ((idx = ll_name_to_index(d)) == 0) { + fprintf(stderr, "Cannot find device \"%s\"\n", d); + return -1; + } + addattr32(&req.n, sizeof(req), RTA_OIF, idx); + } + } + + if (mxrta->rta_len > RTA_LENGTH(0)) { + if (mxlock) + rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock); + addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta)); + } + + if (nhs_ok) + parse_nexthops(&req.n, &req.r, argc, argv); + + if (!table_ok) { + if (req.r.rtm_type == RTN_LOCAL || + req.r.rtm_type == RTN_BROADCAST || + req.r.rtm_type == RTN_NAT || + req.r.rtm_type == RTN_ANYCAST) + req.r.rtm_table = RT_TABLE_LOCAL; + } + if (!scope_ok) { + if (req.r.rtm_type == RTN_LOCAL || + req.r.rtm_type == RTN_NAT) + req.r.rtm_scope = RT_SCOPE_HOST; + else if (req.r.rtm_type == RTN_BROADCAST || + req.r.rtm_type == RTN_MULTICAST || + req.r.rtm_type == RTN_ANYCAST) + req.r.rtm_scope = RT_SCOPE_LINK; + else if (req.r.rtm_type == RTN_UNICAST || + req.r.rtm_type == RTN_UNSPEC) { + if (cmd == RTM_DELROUTE) + req.r.rtm_scope = RT_SCOPE_NOWHERE; + else if (!gw_ok && !nhs_ok) + req.r.rtm_scope = RT_SCOPE_LINK; + } + } + + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = AF_INET; + + if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) + exit(2); + + return 0; +} + +static int rtnl_rtcache_request(struct rtnl_handle *rth, int family) +{ + struct { + struct nlmsghdr nlh; + struct rtmsg rtm; + } req; + struct sockaddr_nl nladdr; + + memset(&nladdr, 0, sizeof(nladdr)); + memset(&req, 0, sizeof(req)); + nladdr.nl_family = AF_NETLINK; + + req.nlh.nlmsg_len = sizeof(req); + req.nlh.nlmsg_type = RTM_GETROUTE; + req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST; + req.nlh.nlmsg_pid = 0; + req.nlh.nlmsg_seq = rth->dump = ++rth->seq; + req.rtm.rtm_family = family; + req.rtm.rtm_flags |= RTM_F_CLONED; + + return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr)); +} + +static int iproute_flush_cache(void) +{ +#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush" + + int len; + int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY); + char *buffer = "-1"; + + if (flush_fd < 0) { + fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH); + return -1; + } + + len = strlen (buffer); + + if ((write (flush_fd, (void *)buffer, len)) < len) { + fprintf (stderr, "Cannot flush routing cache\n"); + return -1; + } + close(flush_fd); + return 0; +} + + +static int iproute_list_or_flush(int argc, char **argv, int flush) +{ + int do_ipv6 = preferred_family; + struct rtnl_handle rth; + char *id = NULL; + char *od = NULL; + + iproute_reset_filter(); + filter.tb = RT_TABLE_MAIN; + + if (flush && argc <= 0) { + fprintf(stderr, "\"ip route flush\" requires arguments.\n"); + return -1; + } + + while (argc > 0) { + if (matches(*argv, "table") == 0) { + int tid; + NEXT_ARG(); + if (rtnl_rttable_a2n(&tid, *argv)) { + if (strcmp(*argv, "all") == 0) { + tid = 0; + } else if (strcmp(*argv, "cache") == 0) { + tid = -1; + } else if (strcmp(*argv, "help") == 0) { + usage(); + } else { + invarg("table id value is invalid\n", *argv); + } + } + filter.tb = tid; + } else if (matches(*argv, "cached") == 0 || + matches(*argv, "cloned") == 0) { + filter.tb = -1; + } else if (strcmp(*argv, "tos") == 0 || + matches(*argv, "dsfield") == 0) { + __u32 tos; + NEXT_ARG(); + if (rtnl_dsfield_a2n(&tos, *argv)) + invarg("TOS value is invalid\n", *argv); + filter.tos = tos; + filter.tosmask = -1; + } else if (matches(*argv, "protocol") == 0) { + int prot = 0; + NEXT_ARG(); + filter.protocolmask = -1; + if (rtnl_rtprot_a2n(&prot, *argv)) { + if (strcmp(*argv, "all") != 0) + invarg("invalid \"protocol\"\n", *argv); + prot = 0; + filter.protocolmask = 0; + } + filter.protocol = prot; + } else if (matches(*argv, "scope") == 0) { + int scope = 0; + NEXT_ARG(); + filter.scopemask = -1; + if (rtnl_rtscope_a2n(&scope, *argv)) { + if (strcmp(*argv, "all") != 0) + invarg("invalid \"scope\"\n", *argv); + scope = RT_SCOPE_NOWHERE; + filter.scopemask = 0; + } + filter.scope = scope; + } else if (matches(*argv, "type") == 0) { + int type; + NEXT_ARG(); + filter.typemask = -1; + if (rtnl_rtntype_a2n(&type, *argv)) + invarg("node type value is invalid\n", *argv); + filter.type = type; + } else if (strcmp(*argv, "dev") == 0 || + strcmp(*argv, "oif") == 0) { + NEXT_ARG(); + od = *argv; + } else if (strcmp(*argv, "iif") == 0) { + NEXT_ARG(); + id = *argv; + } else if (strcmp(*argv, "via") == 0) { + NEXT_ARG(); + get_prefix(&filter.rvia, *argv, do_ipv6); + } else if (strcmp(*argv, "src") == 0) { + NEXT_ARG(); + get_prefix(&filter.rprefsrc, *argv, do_ipv6); + } else if (matches(*argv, "realms") == 0) { + __u32 realm; + NEXT_ARG(); + if (get_rt_realms(&realm, *argv)) + invarg("invalid realms\n", *argv); + filter.realm = realm; + filter.realmmask = ~0U; + if ((filter.realm&0xFFFF) == 0 && + (*argv)[strlen(*argv) - 1] == '/') + filter.realmmask &= ~0xFFFF; + if ((filter.realm&0xFFFF0000U) == 0 && + (strchr(*argv, '/') == NULL || + (*argv)[0] == '/')) + filter.realmmask &= ~0xFFFF0000U; + } else if (matches(*argv, "from") == 0) { + NEXT_ARG(); + if (matches(*argv, "root") == 0) { + NEXT_ARG(); + get_prefix(&filter.rsrc, *argv, do_ipv6); + } else if (matches(*argv, "match") == 0) { + NEXT_ARG(); + get_prefix(&filter.msrc, *argv, do_ipv6); + } else { + if (matches(*argv, "exact") == 0) { + NEXT_ARG(); + } + get_prefix(&filter.msrc, *argv, do_ipv6); + filter.rsrc = filter.msrc; + } + } else { + if (matches(*argv, "to") == 0) { + NEXT_ARG(); + } + if (matches(*argv, "root") == 0) { + NEXT_ARG(); + get_prefix(&filter.rdst, *argv, do_ipv6); + } else if (matches(*argv, "match") == 0) { + NEXT_ARG(); + get_prefix(&filter.mdst, *argv, do_ipv6); + } else { + if (matches(*argv, "exact") == 0) { + NEXT_ARG(); + } + get_prefix(&filter.mdst, *argv, do_ipv6); + filter.rdst = filter.mdst; + } + } + argc--; argv++; + } + + if (do_ipv6 == AF_UNSPEC && filter.tb) + do_ipv6 = AF_INET; + + if (rtnl_open(&rth, 0) < 0) + exit(1); + + ll_init_map(&rth); + + if (id || od) { + int idx; + + if (id) { + if ((idx = ll_name_to_index(id)) == 0) { + fprintf(stderr, "Cannot find device \"%s\"\n", id); + return -1; + } + filter.iif = idx; + filter.iifmask = -1; + } + if (od) { + if ((idx = ll_name_to_index(od)) == 0) { + fprintf(stderr, "Cannot find device \"%s\"\n", od); + return -1; + } + filter.oif = idx; + filter.oifmask = -1; + } + } + + if (flush) { + int round = 0; + char flushb[4096-512]; + + if (filter.tb == -1) { + if (do_ipv6 != AF_INET6) { + iproute_flush_cache(); + if (show_stats) + printf("*** IPv4 routing cache is flushed.\n"); + } + if (do_ipv6 == AF_INET) + return 0; + } + + filter.flushb = flushb; + filter.flushp = 0; + filter.flushe = sizeof(flushb); + filter.rth = &rth; + + for (;;) { + if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { + perror("Cannot send dump request"); + exit(1); + } + filter.flushed = 0; + if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { + fprintf(stderr, "Flush terminated\n"); + exit(1); + } + if (filter.flushed == 0) { + if (round == 0) { + if (filter.tb != -1 || do_ipv6 == AF_INET6) + fprintf(stderr, "Nothing to flush.\n"); + } else if (show_stats) + printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":""); + fflush(stdout); + return 0; + } + round++; + if (flush_update() < 0) + exit(1); + if (show_stats) { + printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed); + fflush(stdout); + } + } + } + + if (filter.tb != -1) { + if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { + perror("Cannot send dump request"); + exit(1); + } + } else { + if (rtnl_rtcache_request(&rth, do_ipv6) < 0) { + perror("Cannot send dump request"); + exit(1); + } + } + + if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { + fprintf(stderr, "Dump terminated\n"); + exit(1); + } + + exit(0); +} + + +int iproute_get(int argc, char **argv) +{ + struct rtnl_handle rth; + struct { + struct nlmsghdr n; + struct rtmsg r; + char buf[1024]; + } req; + char *idev = NULL; + char *odev = NULL; + int connected = 0; + int from_ok = 0; + + memset(&req, 0, sizeof(req)); + + iproute_reset_filter(); + + req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); + req.n.nlmsg_flags = NLM_F_REQUEST; + req.n.nlmsg_type = RTM_GETROUTE; + req.r.rtm_family = preferred_family; + req.r.rtm_table = 0; + req.r.rtm_protocol = 0; + req.r.rtm_scope = 0; + req.r.rtm_type = 0; + req.r.rtm_src_len = 0; + req.r.rtm_dst_len = 0; + req.r.rtm_tos = 0; + + while (argc > 0) { + if (strcmp(*argv, "tos") == 0 || + matches(*argv, "dsfield") == 0) { + __u32 tos; + NEXT_ARG(); + if (rtnl_dsfield_a2n(&tos, *argv)) + invarg("TOS value is invalid\n", *argv); + req.r.rtm_tos = tos; + } else if (matches(*argv, "from") == 0) { + inet_prefix addr; + NEXT_ARG(); + if (matches(*argv, "help") == 0) + usage(); + from_ok = 1; + get_prefix(&addr, *argv, req.r.rtm_family); + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = addr.family; + if (addr.bytelen) + addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); + req.r.rtm_src_len = addr.bitlen; + } else if (matches(*argv, "iif") == 0) { + NEXT_ARG(); + idev = *argv; + } else if (matches(*argv, "oif") == 0 || + strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + odev = *argv; + } else if (matches(*argv, "notify") == 0) { + req.r.rtm_flags |= RTM_F_NOTIFY; + } else if (matches(*argv, "connected") == 0) { + connected = 1; + } else { + inet_prefix addr; + if (strcmp(*argv, "to") == 0) { + NEXT_ARG(); + } + if (matches(*argv, "help") == 0) + usage(); + get_prefix(&addr, *argv, req.r.rtm_family); + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = addr.family; + if (addr.bytelen) + addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen); + req.r.rtm_dst_len = addr.bitlen; + } + argc--; argv++; + } + + if (req.r.rtm_dst_len == 0) { + fprintf(stderr, "need at least destination address\n"); + exit(1); + } + + if (rtnl_open(&rth, 0) < 0) + exit(1); + + ll_init_map(&rth); + + if (idev || odev) { + int idx; + + if (idev) { + if ((idx = ll_name_to_index(idev)) == 0) { + fprintf(stderr, "Cannot find device \"%s\"\n", idev); + return -1; + } + addattr32(&req.n, sizeof(req), RTA_IIF, idx); + } + if (odev) { + if ((idx = ll_name_to_index(odev)) == 0) { + fprintf(stderr, "Cannot find device \"%s\"\n", odev); + return -1; + } + addattr32(&req.n, sizeof(req), RTA_OIF, idx); + } + } + + if (req.r.rtm_family == AF_UNSPEC) + req.r.rtm_family = AF_INET; + + if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) + exit(2); + + if (connected && !from_ok) { + struct rtmsg *r = NLMSG_DATA(&req.n); + int len = req.n.nlmsg_len; + struct rtattr * tb[RTA_MAX+1]; + + if (print_route(NULL, &req.n, (void*)stdout) < 0) { + fprintf(stderr, "An error :-)\n"); + exit(1); + } + + if (req.n.nlmsg_type != RTM_NEWROUTE) { + fprintf(stderr, "Not a route?\n"); + return -1; + } + len -= NLMSG_LENGTH(sizeof(*r)); + if (len < 0) { + fprintf(stderr, "Wrong len %d\n", len); + return -1; + } + + memset(tb, 0, sizeof(tb)); + parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); + + if (tb[RTA_PREFSRC]) { + tb[RTA_PREFSRC]->rta_type = RTA_SRC; + r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]); + } else if (!tb[RTA_SRC]) { + fprintf(stderr, "Failed to connect the route\n"); + return -1; + } + if (!odev && tb[RTA_OIF]) + tb[RTA_OIF]->rta_type = 0; + if (tb[RTA_GATEWAY]) + tb[RTA_GATEWAY]->rta_type = 0; + if (!idev && tb[RTA_IIF]) + tb[RTA_IIF]->rta_type = 0; + req.n.nlmsg_flags = NLM_F_REQUEST; + req.n.nlmsg_type = RTM_GETROUTE; + + if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) + exit(2); + } + + if (print_route(NULL, &req.n, (void*)stdout) < 0) { + fprintf(stderr, "An error :-)\n"); + exit(1); + } + + exit(0); +} + +void iproute_reset_filter() +{ + memset(&filter, 0, sizeof(filter)); + filter.mdst.bitlen = -1; + filter.msrc.bitlen = -1; +} + +int do_iproute(int argc, char **argv) +{ + if (argc < 1) + return iproute_list_or_flush(0, NULL, 0); + + if (matches(*argv, "add") == 0) + return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL, + argc-1, argv+1); + if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0) + return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE, + argc-1, argv+1); + if (matches(*argv, "replace") == 0) + return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE, + argc-1, argv+1); + if (matches(*argv, "prepend") == 0) + return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE, + argc-1, argv+1); + if (matches(*argv, "append") == 0) + return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND, + argc-1, argv+1); + if (matches(*argv, "test") == 0) + return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL, + argc-1, argv+1); + if (matches(*argv, "delete") == 0) + return iproute_modify(RTM_DELROUTE, 0, + argc-1, argv+1); + if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 + || matches(*argv, "lst") == 0) + return iproute_list_or_flush(argc-1, argv+1, 0); + if (matches(*argv, "get") == 0) + return iproute_get(argc-1, argv+1); + if (matches(*argv, "flush") == 0) + return iproute_list_or_flush(argc-1, argv+1, 1); + if (matches(*argv, "help") == 0) + usage(); + fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv); + exit(-1); +} + |