| /* |
| * 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> |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <syslog.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <time.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 <errno.h> |
| |
| #include "rt_names.h" |
| #include "utils.h" |
| #include "ip_common.h" |
| |
| #ifndef RTAX_RTTVAR |
| #define RTAX_RTTVAR RTAX_HOPS |
| #endif |
| |
| enum list_action { |
| IPROUTE_LIST, |
| IPROUTE_FLUSH, |
| IPROUTE_SAVE, |
| }; |
| static const char *mx_names[RTAX_MAX+1] = { |
| [RTAX_MTU] = "mtu", |
| [RTAX_WINDOW] = "window", |
| [RTAX_RTT] = "rtt", |
| [RTAX_RTTVAR] = "rttvar", |
| [RTAX_SSTHRESH] = "ssthresh", |
| [RTAX_CWND] = "cwnd", |
| [RTAX_ADVMSS] = "advmss", |
| [RTAX_REORDERING]="reordering", |
| [RTAX_HOPLIMIT] = "hoplimit", |
| [RTAX_INITCWND] = "initcwnd", |
| [RTAX_FEATURES] = "features", |
| [RTAX_RTO_MIN] = "rto_min", |
| [RTAX_INITRWND] = "initrwnd", |
| }; |
| static void usage(void) __attribute__((noreturn)); |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n"); |
| fprintf(stderr, " ip route save SELECTOR\n"); |
| fprintf(stderr, " ip route restore\n"); |
| fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n"); |
| fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n"); |
| fprintf(stderr, " [ mark NUMBER ]\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 TIME ] [ rttvar TIME ] [reordering NUMBER ]\n"); |
| fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"); |
| fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"); |
| fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\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, "MP_ALGO := { rr | drr | random | wrandom }\n"); |
| fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n"); |
| fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n"); |
| fprintf(stderr, "TIME := NUMBER[s|ms]\n"); |
| exit(-1); |
| } |
| |
| |
| static struct |
| { |
| int tb; |
| int cloned; |
| int flushed; |
| char *flushb; |
| int flushp; |
| int flushe; |
| int protocol, protocolmask; |
| int scope, scopemask; |
| int type, typemask; |
| int tos, tosmask; |
| int iif, iifmask; |
| int oif, oifmask; |
| int mark, markmask; |
| 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_check(&rth, filter.flushb, filter.flushp) < 0) { |
| perror("Failed to send flush request"); |
| return -1; |
| } |
| filter.flushp = 0; |
| return 0; |
| } |
| |
| int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len) |
| { |
| struct rtmsg *r = NLMSG_DATA(n); |
| inet_prefix dst; |
| inet_prefix src; |
| inet_prefix via; |
| inet_prefix prefsrc; |
| __u32 table; |
| static int ip6_multiple_tables; |
| |
| table = rtm_get_table(r, tb); |
| |
| if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN) |
| ip6_multiple_tables = 1; |
| |
| if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED)) |
| return 0; |
| |
| if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) { |
| if (filter.tb) { |
| 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 != 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(&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/8); |
| } |
| 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/8); |
| } |
| |
| 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.markmask) { |
| int mark = 0; |
| if (tb[RTA_MARK]) |
| mark = *(int *)RTA_DATA(tb[RTA_MARK]); |
| if ((mark ^ filter.mark) & filter.markmask) |
| 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; |
| |
| return 1; |
| } |
| |
| int calc_host_len(struct rtmsg *r) |
| { |
| if (r->rtm_family == AF_INET6) |
| return 128; |
| else if (r->rtm_family == AF_INET) |
| return 32; |
| else if (r->rtm_family == AF_DECnet) |
| return 16; |
| else if (r->rtm_family == AF_IPX) |
| return 80; |
| else |
| return -1; |
| } |
| |
| int print_route(const 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]; |
| int host_len = -1; |
| __u32 table; |
| SPRINT_BUF(b1); |
| static int hz; |
| |
| 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; |
| } |
| |
| host_len = calc_host_len(r); |
| |
| parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); |
| table = rtm_get_table(r, tb); |
| |
| if (!filter_nlmsg(n, tb, host_len)) |
| 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 = ++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 (table != RT_TABLE_MAIN && !filter.tb) |
| fprintf(fp, " table %s ", rtnl_rttable_n2a(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_NOTIFY) |
| fprintf(fp, "notify "); |
| if (tb[RTA_MARK]) { |
| unsigned int mark = *(unsigned int*)RTA_DATA(tb[RTA_MARK]); |
| if (mark) { |
| if (mark >= 16) |
| fprintf(fp, " mark 0x%x", mark); |
| else |
| fprintf(fp, " mark %u", mark); |
| } |
| } |
| |
| 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"); |
| |
| if (flags) |
| fprintf(fp, "%s%x> ", first ? "<" : "", flags); |
| if (tb[RTA_CACHEINFO]) { |
| struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]); |
| if (!hz) |
| hz = get_user_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)) { |
| if (!hz) |
| hz = get_user_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]; |
| |
| 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++) { |
| unsigned val; |
| |
| if (mxrta[i] == NULL) |
| continue; |
| |
| if (i < sizeof(mx_names)/sizeof(char*) && mx_names[i]) |
| fprintf(fp, " %s", mx_names[i]); |
| else |
| fprintf(fp, " metric %d", i); |
| if (mxlock & (1<<i)) |
| fprintf(fp, " lock"); |
| |
| val = *(unsigned*)RTA_DATA(mxrta[i]); |
| switch (i) { |
| case RTAX_HOPLIMIT: |
| if ((int)val == -1) |
| val = 0; |
| /* fall through */ |
| default: |
| fprintf(fp, " %u", val); |
| break; |
| |
| case RTAX_RTT: |
| case RTAX_RTTVAR: |
| case RTAX_RTO_MIN: |
| if (i == RTAX_RTT) |
| val /= 8; |
| else if (i == RTAX_RTTVAR) |
| val /= 4; |
| |
| if (val >= 1000) |
| fprintf(fp, " %gs", val/1e3); |
| else |
| fprintf(fp, " %ums", val); |
| } |
| } |
| } |
| 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)) { |
| 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 (tb[RTA_FLOW]) { |
| __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_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 if (matches(*argv, "realms") == 0) { |
| __u32 realm; |
| NEXT_ARG(); |
| if (get_rt_realms(&realm, *argv)) |
| invarg("\"realm\" value is invalid\n", *argv); |
| rta_addattr32(rta, 4096, RTA_FLOW, realm); |
| rtnh->rtnh_len += sizeof(struct rtattr) + 4; |
| } 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 { |
| 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; |
| int raw = 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) { |
| __u32 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_HOPLIMIT |
| } else if (strcmp(*argv, "hoplimit") == 0) { |
| unsigned hoplimit; |
| NEXT_ARG(); |
| if (strcmp(*argv, "lock") == 0) { |
| mxlock |= (1<<RTAX_HOPLIMIT); |
| NEXT_ARG(); |
| } |
| if (get_unsigned(&hoplimit, *argv, 0)) |
| invarg("\"hoplimit\" value is invalid\n", *argv); |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit); |
| #endif |
| #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_jiffies(&rtt, *argv, &raw)) |
| invarg("\"rtt\" value is invalid\n", *argv); |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, |
| (raw) ? rtt : rtt * 8); |
| } else if (strcmp(*argv, "rto_min") == 0) { |
| unsigned rto_min; |
| NEXT_ARG(); |
| mxlock |= (1<<RTAX_RTO_MIN); |
| if (get_jiffies(&rto_min, *argv, &raw)) |
| invarg("\"rto_min\" value is invalid\n", |
| *argv); |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN, |
| rto_min); |
| } 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, "initcwnd") == 0) { |
| unsigned win; |
| NEXT_ARG(); |
| if (strcmp(*argv, "lock") == 0) { |
| mxlock |= (1<<RTAX_INITCWND); |
| NEXT_ARG(); |
| } |
| if (get_unsigned(&win, *argv, 0)) |
| invarg("\"initcwnd\" value is invalid\n", *argv); |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win); |
| } else if (matches(*argv, "initrwnd") == 0) { |
| unsigned win; |
| NEXT_ARG(); |
| if (strcmp(*argv, "lock") == 0) { |
| mxlock |= (1<<RTAX_INITRWND); |
| NEXT_ARG(); |
| } |
| if (get_unsigned(&win, *argv, 0)) |
| invarg("\"initrwnd\" value is invalid\n", *argv); |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win); |
| } else if (matches(*argv, "rttvar") == 0) { |
| unsigned win; |
| NEXT_ARG(); |
| if (strcmp(*argv, "lock") == 0) { |
| mxlock |= (1<<RTAX_RTTVAR); |
| NEXT_ARG(); |
| } |
| if (get_jiffies(&win, *argv, &raw)) |
| invarg("\"rttvar\" value is invalid\n", *argv); |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, |
| (raw) ? win : win * 4); |
| } 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 (strcmp(*argv, "nexthop") == 0) { |
| nhs_ok = 1; |
| break; |
| } else if (matches(*argv, "protocol") == 0) { |
| __u32 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) { |
| __u32 tid; |
| NEXT_ARG(); |
| if (rtnl_rttable_a2n(&tid, *argv)) |
| invarg("\"table\" value is invalid\n", *argv); |
| if (tid < 256) |
| req.r.rtm_table = tid; |
| else { |
| req.r.rtm_table = RT_TABLE_UNSPEC; |
| addattr32(&req.n, sizeof(req), RTA_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 (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; |
| } |
| |
| int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| { |
| int ret; |
| int len = n->nlmsg_len; |
| struct rtmsg *r = NLMSG_DATA(n); |
| struct rtattr *tb[RTA_MAX+1]; |
| int host_len = -1; |
| |
| if (isatty(STDOUT_FILENO)) { |
| fprintf(stderr, "Not sending binary stream to stdout\n"); |
| return -1; |
| } |
| |
| host_len = calc_host_len(r); |
| len -= NLMSG_LENGTH(sizeof(*r)); |
| parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); |
| |
| if (!filter_nlmsg(n, tb, host_len)) |
| return 0; |
| |
| ret = write(STDOUT_FILENO, n, n->nlmsg_len); |
| if ((ret > 0) && (ret != n->nlmsg_len)) { |
| fprintf(stderr, "Short write while saving nlmsg\n"); |
| ret = -EIO; |
| } |
| |
| return ret == n->nlmsg_len ? 0 : ret; |
| } |
| |
| static int iproute_list_flush_or_save(int argc, char **argv, int action) |
| { |
| int do_ipv6 = preferred_family; |
| char *id = NULL; |
| char *od = NULL; |
| unsigned int mark = 0; |
| rtnl_filter_t filter_fn; |
| |
| if (action == IPROUTE_SAVE) |
| filter_fn = save_route; |
| else |
| filter_fn = print_route; |
| |
| iproute_reset_filter(); |
| filter.tb = RT_TABLE_MAIN; |
| |
| if ((action == IPROUTE_FLUSH) && argc <= 0) { |
| fprintf(stderr, "\"ip route flush\" requires arguments.\n"); |
| return -1; |
| } |
| |
| while (argc > 0) { |
| if (matches(*argv, "table") == 0) { |
| __u32 tid; |
| NEXT_ARG(); |
| if (rtnl_rttable_a2n(&tid, *argv)) { |
| if (strcmp(*argv, "all") == 0) { |
| filter.tb = 0; |
| } else if (strcmp(*argv, "cache") == 0) { |
| filter.cloned = 1; |
| } else if (strcmp(*argv, "help") == 0) { |
| usage(); |
| } else { |
| invarg("table id value is invalid\n", *argv); |
| } |
| } else |
| filter.tb = tid; |
| } else if (matches(*argv, "cached") == 0 || |
| matches(*argv, "cloned") == 0) { |
| filter.cloned = 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) { |
| __u32 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) { |
| __u32 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, "mark") == 0) { |
| NEXT_ARG(); |
| get_unsigned(&mark, *argv, 0); |
| filter.markmask = -1; |
| } 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; |
| |
| 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; |
| } |
| } |
| filter.mark = mark; |
| |
| if (action == IPROUTE_FLUSH) { |
| int round = 0; |
| char flushb[4096-512]; |
| time_t start = time(0); |
| |
| if (filter.cloned) { |
| 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); |
| |
| 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, filter_fn, stdout, NULL, NULL) < 0) { |
| fprintf(stderr, "Flush terminated\n"); |
| exit(1); |
| } |
| if (filter.flushed == 0) { |
| if (show_stats) { |
| if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6)) |
| printf("Nothing to flush.\n"); |
| else |
| 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 (time(0) - start > 30) { |
| printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n", |
| time(0) - start, filter.flushed); |
| exit(1); |
| } |
| |
| if (show_stats) { |
| printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed); |
| fflush(stdout); |
| } |
| } |
| } |
| |
| if (!filter.cloned) { |
| 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, filter_fn, stdout, NULL, NULL) < 0) { |
| fprintf(stderr, "Dump terminated\n"); |
| exit(1); |
| } |
| |
| exit(0); |
| } |
| |
| |
| int iproute_get(int argc, char **argv) |
| { |
| struct { |
| struct nlmsghdr n; |
| struct rtmsg r; |
| char buf[1024]; |
| } req; |
| char *idev = NULL; |
| char *odev = NULL; |
| int connected = 0; |
| int from_ok = 0; |
| unsigned int mark = 0; |
| |
| memset(&req, 0, sizeof(req)); |
| |
| iproute_reset_filter(); |
| filter.cloned = 2; |
| |
| 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, "mark") == 0) { |
| NEXT_ARG(); |
| get_unsigned(&mark, *argv, 0); |
| } 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); |
| } |
| |
| 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 (mark) |
| addattr32(&req.n, sizeof(req), RTA_MARK, mark); |
| |
| 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; |
| } |
| |
| 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); |
| } |
| |
| int restore_handler(const struct sockaddr_nl *nl, struct nlmsghdr *n, void *arg) |
| { |
| int ret; |
| |
| n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK; |
| |
| ll_init_map(&rth); |
| |
| ret = rtnl_talk(&rth, n, 0, 0, n, NULL, NULL); |
| if ((ret < 0) && (errno == EEXIST)) |
| ret = 0; |
| |
| return ret; |
| } |
| |
| int iproute_restore(void) |
| { |
| exit(rtnl_from_file(stdin, &restore_handler, NULL)); |
| } |
| |
| 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_flush_or_save(0, NULL, IPROUTE_LIST); |
| |
| 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_flush_or_save(argc-1, argv+1, IPROUTE_LIST); |
| if (matches(*argv, "get") == 0) |
| return iproute_get(argc-1, argv+1); |
| if (matches(*argv, "flush") == 0) |
| return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH); |
| if (matches(*argv, "save") == 0) |
| return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE); |
| if (matches(*argv, "restore") == 0) |
| return iproute_restore(); |
| if (matches(*argv, "help") == 0) |
| usage(); |
| fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv); |
| exit(-1); |
| } |
| |