[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * iproute.c "ip route".
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| 4 | *
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| 5 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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| 6 | *
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| 7 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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| 8 | *
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| 9 | *
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| 10 | * Changes:
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| 11 | *
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| 12 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
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| 13 | * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized
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| 14 | */
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| 15 |
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| 16 | #include "libbb.h"
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| 17 |
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| 18 | #include <sys/socket.h>
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| 19 |
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| 20 | #include <string.h>
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| 21 | #include <fcntl.h>
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| 22 | #include <unistd.h>
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| 23 |
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| 24 | #include "rt_names.h"
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| 25 | #include "utils.h"
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| 26 | #include "ip_common.h"
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| 27 |
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| 28 | #ifndef RTAX_RTTVAR
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| 29 | #define RTAX_RTTVAR RTAX_HOPS
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| 30 | #endif
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| 31 |
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| 32 |
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| 33 | static struct
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| 34 | {
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| 35 | int tb;
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| 36 | int flushed;
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| 37 | char *flushb;
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| 38 | int flushp;
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| 39 | int flushe;
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| 40 | struct rtnl_handle *rth;
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| 41 | int protocol, protocolmask;
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| 42 | int scope, scopemask;
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| 43 | int type, typemask;
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| 44 | int tos, tosmask;
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| 45 | int iif, iifmask;
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| 46 | int oif, oifmask;
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| 47 | int realm, realmmask;
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| 48 | inet_prefix rprefsrc;
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| 49 | inet_prefix rvia;
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| 50 | inet_prefix rdst;
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| 51 | inet_prefix mdst;
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| 52 | inet_prefix rsrc;
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| 53 | inet_prefix msrc;
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| 54 | } filter;
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| 55 |
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| 56 | static int flush_update(void)
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| 57 | {
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| 58 | if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
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| 59 | perror("Failed to send flush request\n");
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| 60 | return -1;
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| 61 | }
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| 62 | filter.flushp = 0;
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| 63 | return 0;
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| 64 | }
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| 65 |
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| 66 | static int print_route(struct sockaddr_nl *who ATTRIBUTE_UNUSED,
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| 67 | struct nlmsghdr *n, void *arg)
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| 68 | {
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| 69 | FILE *fp = (FILE*)arg;
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| 70 | struct rtmsg *r = NLMSG_DATA(n);
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| 71 | int len = n->nlmsg_len;
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| 72 | struct rtattr * tb[RTA_MAX+1];
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| 73 | char abuf[256];
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| 74 | inet_prefix dst;
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| 75 | inet_prefix src;
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| 76 | int host_len = -1;
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| 77 | SPRINT_BUF(b1);
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| 78 |
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| 79 |
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| 80 | if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
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| 81 | fprintf(stderr, "Not a route: %08x %08x %08x\n",
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| 82 | n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
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| 83 | return 0;
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| 84 | }
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| 85 | if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
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| 86 | return 0;
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| 87 | len -= NLMSG_LENGTH(sizeof(*r));
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| 88 | if (len < 0) {
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| 89 | bb_error_msg("wrong nlmsg len %d", len);
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| 90 | return -1;
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| 91 | }
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| 92 |
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| 93 | if (r->rtm_family == AF_INET6)
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| 94 | host_len = 128;
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| 95 | else if (r->rtm_family == AF_INET)
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| 96 | host_len = 32;
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| 97 |
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| 98 | if (r->rtm_family == AF_INET6) {
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| 99 | if (filter.tb) {
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| 100 | if (filter.tb < 0) {
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| 101 | if (!(r->rtm_flags&RTM_F_CLONED)) {
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| 102 | return 0;
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| 103 | }
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| 104 | } else {
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| 105 | if (r->rtm_flags&RTM_F_CLONED) {
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| 106 | return 0;
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| 107 | }
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| 108 | if (filter.tb == RT_TABLE_LOCAL) {
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| 109 | if (r->rtm_type != RTN_LOCAL) {
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| 110 | return 0;
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| 111 | }
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| 112 | } else if (filter.tb == RT_TABLE_MAIN) {
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| 113 | if (r->rtm_type == RTN_LOCAL) {
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| 114 | return 0;
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| 115 | }
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| 116 | } else {
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| 117 | return 0;
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| 118 | }
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| 119 | }
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| 120 | }
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| 121 | } else {
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| 122 | if (filter.tb > 0 && filter.tb != r->rtm_table) {
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| 123 | return 0;
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| 124 | }
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| 125 | }
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| 126 | if (filter.rdst.family &&
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| 127 | (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) {
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| 128 | return 0;
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| 129 | }
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| 130 | if (filter.mdst.family &&
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| 131 | (r->rtm_family != filter.mdst.family ||
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| 132 | (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) {
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| 133 | return 0;
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| 134 | }
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| 135 | if (filter.rsrc.family &&
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| 136 | (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) {
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| 137 | return 0;
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| 138 | }
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| 139 | if (filter.msrc.family &&
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| 140 | (r->rtm_family != filter.msrc.family ||
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| 141 | (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) {
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| 142 | return 0;
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| 143 | }
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| 144 |
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| 145 | memset(tb, 0, sizeof(tb));
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| 146 | parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
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| 147 |
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| 148 | if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
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| 149 | return 0;
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| 150 | if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
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| 151 | inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
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| 152 | return 0;
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| 153 |
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| 154 | if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
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| 155 | return 0;
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| 156 | if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
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| 157 | inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
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| 158 | return 0;
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| 159 |
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| 160 | if (filter.flushb &&
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| 161 | r->rtm_family == AF_INET6 &&
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| 162 | r->rtm_dst_len == 0 &&
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| 163 | r->rtm_type == RTN_UNREACHABLE &&
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| 164 | tb[RTA_PRIORITY] &&
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| 165 | *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
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| 166 | return 0;
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| 167 |
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| 168 | if (filter.flushb) {
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| 169 | struct nlmsghdr *fn;
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| 170 | if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
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| 171 | if (flush_update())
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| 172 | return -1;
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| 173 | }
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| 174 | fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
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| 175 | memcpy(fn, n, n->nlmsg_len);
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| 176 | fn->nlmsg_type = RTM_DELROUTE;
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| 177 | fn->nlmsg_flags = NLM_F_REQUEST;
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| 178 | fn->nlmsg_seq = ++filter.rth->seq;
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| 179 | filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
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| 180 | filter.flushed++;
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| 181 | return 0;
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| 182 | }
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| 183 |
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| 184 | if (n->nlmsg_type == RTM_DELROUTE) {
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| 185 | fprintf(fp, "Deleted ");
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| 186 | }
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| 187 | if (r->rtm_type != RTN_UNICAST && !filter.type) {
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| 188 | fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
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| 189 | }
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| 190 |
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| 191 | if (tb[RTA_DST]) {
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| 192 | if (r->rtm_dst_len != host_len) {
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| 193 | fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
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| 194 | RTA_PAYLOAD(tb[RTA_DST]),
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| 195 | RTA_DATA(tb[RTA_DST]),
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| 196 | abuf, sizeof(abuf)),
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| 197 | r->rtm_dst_len
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| 198 | );
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| 199 | } else {
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| 200 | fprintf(fp, "%s ", format_host(r->rtm_family,
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| 201 | RTA_PAYLOAD(tb[RTA_DST]),
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| 202 | RTA_DATA(tb[RTA_DST]),
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| 203 | abuf, sizeof(abuf))
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| 204 | );
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| 205 | }
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| 206 | } else if (r->rtm_dst_len) {
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| 207 | fprintf(fp, "0/%d ", r->rtm_dst_len);
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| 208 | } else {
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| 209 | fprintf(fp, "default ");
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| 210 | }
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| 211 | if (tb[RTA_SRC]) {
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| 212 | if (r->rtm_src_len != host_len) {
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| 213 | fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
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| 214 | RTA_PAYLOAD(tb[RTA_SRC]),
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| 215 | RTA_DATA(tb[RTA_SRC]),
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| 216 | abuf, sizeof(abuf)),
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| 217 | r->rtm_src_len
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| 218 | );
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| 219 | } else {
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| 220 | fprintf(fp, "from %s ", format_host(r->rtm_family,
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| 221 | RTA_PAYLOAD(tb[RTA_SRC]),
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| 222 | RTA_DATA(tb[RTA_SRC]),
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| 223 | abuf, sizeof(abuf))
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| 224 | );
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| 225 | }
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| 226 | } else if (r->rtm_src_len) {
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| 227 | fprintf(fp, "from 0/%u ", r->rtm_src_len);
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| 228 | }
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| 229 | if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
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| 230 | fprintf(fp, "via %s ",
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| 231 | format_host(r->rtm_family,
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| 232 | RTA_PAYLOAD(tb[RTA_GATEWAY]),
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| 233 | RTA_DATA(tb[RTA_GATEWAY]),
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| 234 | abuf, sizeof(abuf)));
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| 235 | }
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| 236 | if (tb[RTA_OIF] && filter.oifmask != -1) {
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| 237 | fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
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| 238 | }
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| 239 |
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| 240 | if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
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| 241 | /* Do not use format_host(). It is our local addr
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| 242 | and symbolic name will not be useful.
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| 243 | */
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| 244 | fprintf(fp, " src %s ",
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| 245 | rt_addr_n2a(r->rtm_family,
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| 246 | RTA_PAYLOAD(tb[RTA_PREFSRC]),
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| 247 | RTA_DATA(tb[RTA_PREFSRC]),
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| 248 | abuf, sizeof(abuf)));
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| 249 | }
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| 250 | if (tb[RTA_PRIORITY]) {
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| 251 | fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY]));
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| 252 | }
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| 253 | if (r->rtm_family == AF_INET6) {
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| 254 | struct rta_cacheinfo *ci = NULL;
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| 255 | if (tb[RTA_CACHEINFO]) {
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| 256 | ci = RTA_DATA(tb[RTA_CACHEINFO]);
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| 257 | }
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| 258 | if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
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| 259 | static int hz;
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| 260 | if (!hz) {
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| 261 | hz = get_hz();
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| 262 | }
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| 263 | if (r->rtm_flags & RTM_F_CLONED) {
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| 264 | fprintf(fp, "%s cache ", _SL_);
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| 265 | }
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| 266 | if (ci->rta_expires) {
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| 267 | fprintf(fp, " expires %dsec", ci->rta_expires/hz);
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| 268 | }
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| 269 | if (ci->rta_error != 0) {
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| 270 | fprintf(fp, " error %d", ci->rta_error);
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| 271 | }
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| 272 | } else if (ci) {
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| 273 | if (ci->rta_error != 0)
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| 274 | fprintf(fp, " error %d", ci->rta_error);
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| 275 | }
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| 276 | }
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| 277 | if (tb[RTA_IIF] && filter.iifmask != -1) {
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| 278 | fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
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| 279 | }
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| 280 | fprintf(fp, "\n");
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| 281 | fflush(fp);
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| 282 | return 0;
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| 283 | }
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| 284 |
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| 285 | static int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
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| 286 | {
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| 287 | struct rtnl_handle rth;
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| 288 | struct {
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| 289 | struct nlmsghdr n;
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| 290 | struct rtmsg r;
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| 291 | char buf[1024];
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| 292 | } req;
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| 293 | char mxbuf[256];
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| 294 | struct rtattr * mxrta = (void*)mxbuf;
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| 295 | unsigned mxlock = 0;
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| 296 | char *d = NULL;
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| 297 | int gw_ok = 0;
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| 298 | int dst_ok = 0;
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| 299 | int proto_ok = 0;
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| 300 | int type_ok = 0;
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| 301 |
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| 302 | memset(&req, 0, sizeof(req));
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| 303 |
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| 304 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
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| 305 | req.n.nlmsg_flags = NLM_F_REQUEST|flags;
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| 306 | req.n.nlmsg_type = cmd;
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| 307 | req.r.rtm_family = preferred_family;
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| 308 | req.r.rtm_table = RT_TABLE_MAIN;
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| 309 | req.r.rtm_scope = RT_SCOPE_NOWHERE;
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| 310 |
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| 311 | if (cmd != RTM_DELROUTE) {
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| 312 | req.r.rtm_protocol = RTPROT_BOOT;
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| 313 | req.r.rtm_scope = RT_SCOPE_UNIVERSE;
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| 314 | req.r.rtm_type = RTN_UNICAST;
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| 315 | }
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| 316 |
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| 317 | mxrta->rta_type = RTA_METRICS;
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| 318 | mxrta->rta_len = RTA_LENGTH(0);
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| 319 |
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| 320 | while (argc > 0) {
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| 321 | if (strcmp(*argv, "src") == 0) {
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| 322 | inet_prefix addr;
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| 323 | NEXT_ARG();
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| 324 | get_addr(&addr, *argv, req.r.rtm_family);
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| 325 | if (req.r.rtm_family == AF_UNSPEC) {
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| 326 | req.r.rtm_family = addr.family;
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| 327 | }
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| 328 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
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| 329 | } else if (strcmp(*argv, "via") == 0) {
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| 330 | inet_prefix addr;
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| 331 | gw_ok = 1;
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| 332 | NEXT_ARG();
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| 333 | get_addr(&addr, *argv, req.r.rtm_family);
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| 334 | if (req.r.rtm_family == AF_UNSPEC) {
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| 335 | req.r.rtm_family = addr.family;
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| 336 | }
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| 337 | addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
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| 338 | } else if (strcmp(*argv, "mtu") == 0) {
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| 339 | unsigned mtu;
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| 340 | NEXT_ARG();
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| 341 | if (strcmp(*argv, "lock") == 0) {
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| 342 | mxlock |= (1<<RTAX_MTU);
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| 343 | NEXT_ARG();
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| 344 | }
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| 345 | if (get_unsigned(&mtu, *argv, 0)) {
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| 346 | invarg(*argv, "mtu");
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| 347 | }
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| 348 | rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
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| 349 | } else if (matches(*argv, "protocol") == 0) {
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| 350 | uint32_t prot;
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| 351 | NEXT_ARG();
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| 352 | if (rtnl_rtprot_a2n(&prot, *argv))
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| 353 | invarg(*argv, "protocol");
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| 354 | req.r.rtm_protocol = prot;
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| 355 | proto_ok =1;
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| 356 | } else if (strcmp(*argv, "dev") == 0 ||
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| 357 | strcmp(*argv, "oif") == 0) {
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| 358 | NEXT_ARG();
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| 359 | d = *argv;
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| 360 | } else {
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| 361 | int type;
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| 362 | inet_prefix dst;
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| 363 |
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| 364 | if (strcmp(*argv, "to") == 0) {
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| 365 | NEXT_ARG();
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| 366 | }
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| 367 | if ((**argv < '0' || **argv > '9') &&
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| 368 | rtnl_rtntype_a2n(&type, *argv) == 0) {
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| 369 | NEXT_ARG();
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| 370 | req.r.rtm_type = type;
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| 371 | type_ok = 1;
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| 372 | }
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| 373 |
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| 374 | if (dst_ok) {
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| 375 | duparg2("to", *argv);
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| 376 | }
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| 377 | get_prefix(&dst, *argv, req.r.rtm_family);
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| 378 | if (req.r.rtm_family == AF_UNSPEC) {
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| 379 | req.r.rtm_family = dst.family;
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| 380 | }
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| 381 | req.r.rtm_dst_len = dst.bitlen;
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| 382 | dst_ok = 1;
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| 383 | if (dst.bytelen) {
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| 384 | addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
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| 385 | }
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| 386 | }
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| 387 | argc--; argv++;
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| 388 | }
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| 389 |
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| 390 | if (rtnl_open(&rth, 0) < 0) {
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| 391 | exit(1);
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| 392 | }
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| 393 |
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| 394 | if (d) {
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| 395 | int idx;
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| 396 |
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| 397 | ll_init_map(&rth);
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| 398 |
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| 399 | if (d) {
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| 400 | if ((idx = ll_name_to_index(d)) == 0) {
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| 401 | bb_error_msg("Cannot find device \"%s\"", d);
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| 402 | return -1;
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| 403 | }
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| 404 | addattr32(&req.n, sizeof(req), RTA_OIF, idx);
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| 405 | }
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| 406 | }
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| 407 |
|
---|
| 408 | if (mxrta->rta_len > RTA_LENGTH(0)) {
|
---|
| 409 | if (mxlock) {
|
---|
| 410 | rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
|
---|
| 411 | }
|
---|
| 412 | addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
|
---|
| 413 | }
|
---|
| 414 |
|
---|
| 415 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
| 416 | req.r.rtm_family = AF_INET;
|
---|
| 417 | }
|
---|
| 418 |
|
---|
| 419 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) {
|
---|
| 420 | exit(2);
|
---|
| 421 | }
|
---|
| 422 |
|
---|
| 423 | return 0;
|
---|
| 424 | }
|
---|
| 425 |
|
---|
| 426 | static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
|
---|
| 427 | {
|
---|
| 428 | struct {
|
---|
| 429 | struct nlmsghdr nlh;
|
---|
| 430 | struct rtmsg rtm;
|
---|
| 431 | } req;
|
---|
| 432 | struct sockaddr_nl nladdr;
|
---|
| 433 |
|
---|
| 434 | memset(&nladdr, 0, sizeof(nladdr));
|
---|
| 435 | memset(&req, 0, sizeof(req));
|
---|
| 436 | nladdr.nl_family = AF_NETLINK;
|
---|
| 437 |
|
---|
| 438 | req.nlh.nlmsg_len = sizeof(req);
|
---|
| 439 | req.nlh.nlmsg_type = RTM_GETROUTE;
|
---|
| 440 | req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
|
---|
| 441 | req.nlh.nlmsg_pid = 0;
|
---|
| 442 | req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
|
---|
| 443 | req.rtm.rtm_family = family;
|
---|
| 444 | req.rtm.rtm_flags |= RTM_F_CLONED;
|
---|
| 445 |
|
---|
| 446 | return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
|
---|
| 447 | }
|
---|
| 448 |
|
---|
| 449 | static int iproute_flush_cache(void)
|
---|
| 450 | {
|
---|
| 451 | #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
|
---|
| 452 |
|
---|
| 453 | int len;
|
---|
| 454 | int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
|
---|
| 455 | char *buffer = "-1";
|
---|
| 456 |
|
---|
| 457 | if (flush_fd < 0) {
|
---|
| 458 | fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
|
---|
| 459 | return -1;
|
---|
| 460 | }
|
---|
| 461 |
|
---|
| 462 | len = strlen (buffer);
|
---|
| 463 |
|
---|
| 464 | if ((write (flush_fd, (void *)buffer, len)) < len) {
|
---|
| 465 | fprintf (stderr, "Cannot flush routing cache\n");
|
---|
| 466 | return -1;
|
---|
| 467 | }
|
---|
| 468 | close(flush_fd);
|
---|
| 469 | return 0;
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 | static void iproute_reset_filter(void)
|
---|
| 473 | {
|
---|
| 474 | memset(&filter, 0, sizeof(filter));
|
---|
| 475 | filter.mdst.bitlen = -1;
|
---|
| 476 | filter.msrc.bitlen = -1;
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | static int iproute_list_or_flush(int argc, char **argv, int flush)
|
---|
| 480 | {
|
---|
| 481 | int do_ipv6 = preferred_family;
|
---|
| 482 | struct rtnl_handle rth;
|
---|
| 483 | char *id = NULL;
|
---|
| 484 | char *od = NULL;
|
---|
| 485 |
|
---|
| 486 | iproute_reset_filter();
|
---|
| 487 | filter.tb = RT_TABLE_MAIN;
|
---|
| 488 |
|
---|
| 489 | if (flush && argc <= 0) {
|
---|
| 490 | bb_error_msg(bb_msg_requires_arg, "\"ip route flush\"");
|
---|
| 491 | return -1;
|
---|
| 492 | }
|
---|
| 493 |
|
---|
| 494 | while (argc > 0) {
|
---|
| 495 | if (matches(*argv, "protocol") == 0) {
|
---|
| 496 | uint32_t prot = 0;
|
---|
| 497 | NEXT_ARG();
|
---|
| 498 | filter.protocolmask = -1;
|
---|
| 499 | if (rtnl_rtprot_a2n(&prot, *argv)) {
|
---|
| 500 | if (strcmp(*argv, "all") != 0) {
|
---|
| 501 | invarg(*argv, "protocol");
|
---|
| 502 | }
|
---|
| 503 | prot = 0;
|
---|
| 504 | filter.protocolmask = 0;
|
---|
| 505 | }
|
---|
| 506 | filter.protocol = prot;
|
---|
| 507 | } else if (strcmp(*argv, "dev") == 0 ||
|
---|
| 508 | strcmp(*argv, "oif") == 0) {
|
---|
| 509 | NEXT_ARG();
|
---|
| 510 | od = *argv;
|
---|
| 511 | } else if (strcmp(*argv, "iif") == 0) {
|
---|
| 512 | NEXT_ARG();
|
---|
| 513 | id = *argv;
|
---|
| 514 | } else if (matches(*argv, "from") == 0) {
|
---|
| 515 | NEXT_ARG();
|
---|
| 516 | if (matches(*argv, "root") == 0) {
|
---|
| 517 | NEXT_ARG();
|
---|
| 518 | get_prefix(&filter.rsrc, *argv, do_ipv6);
|
---|
| 519 | } else if (matches(*argv, "match") == 0) {
|
---|
| 520 | NEXT_ARG();
|
---|
| 521 | get_prefix(&filter.msrc, *argv, do_ipv6);
|
---|
| 522 | } else {
|
---|
| 523 | if (matches(*argv, "exact") == 0) {
|
---|
| 524 | NEXT_ARG();
|
---|
| 525 | }
|
---|
| 526 | get_prefix(&filter.msrc, *argv, do_ipv6);
|
---|
| 527 | filter.rsrc = filter.msrc;
|
---|
| 528 | }
|
---|
| 529 | } else {
|
---|
| 530 | if (matches(*argv, "to") == 0) {
|
---|
| 531 | NEXT_ARG();
|
---|
| 532 | }
|
---|
| 533 | if (matches(*argv, "root") == 0) {
|
---|
| 534 | NEXT_ARG();
|
---|
| 535 | get_prefix(&filter.rdst, *argv, do_ipv6);
|
---|
| 536 | } else if (matches(*argv, "match") == 0) {
|
---|
| 537 | NEXT_ARG();
|
---|
| 538 | get_prefix(&filter.mdst, *argv, do_ipv6);
|
---|
| 539 | } else if (matches(*argv, "table") == 0) {
|
---|
| 540 | NEXT_ARG();
|
---|
| 541 | if (matches(*argv, "cache") == 0) {
|
---|
| 542 | filter.tb = -1;
|
---|
| 543 | } else if (matches(*argv, "main") != 0) {
|
---|
| 544 | invarg(*argv, "table");
|
---|
| 545 | }
|
---|
| 546 | } else if (matches(*argv, "cache") == 0) {
|
---|
| 547 | filter.tb = -1;
|
---|
| 548 | } else {
|
---|
| 549 | if (matches(*argv, "exact") == 0) {
|
---|
| 550 | NEXT_ARG();
|
---|
| 551 | }
|
---|
| 552 | get_prefix(&filter.mdst, *argv, do_ipv6);
|
---|
| 553 | filter.rdst = filter.mdst;
|
---|
| 554 | }
|
---|
| 555 | }
|
---|
| 556 | argc--; argv++;
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | if (do_ipv6 == AF_UNSPEC && filter.tb) {
|
---|
| 560 | do_ipv6 = AF_INET;
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | if (rtnl_open(&rth, 0) < 0) {
|
---|
| 564 | exit(1);
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | ll_init_map(&rth);
|
---|
| 568 |
|
---|
| 569 | if (id || od) {
|
---|
| 570 | int idx;
|
---|
| 571 |
|
---|
| 572 | if (id) {
|
---|
| 573 | if ((idx = ll_name_to_index(id)) == 0) {
|
---|
| 574 | bb_error_msg("Cannot find device \"%s\"", id);
|
---|
| 575 | return -1;
|
---|
| 576 | }
|
---|
| 577 | filter.iif = idx;
|
---|
| 578 | filter.iifmask = -1;
|
---|
| 579 | }
|
---|
| 580 | if (od) {
|
---|
| 581 | if ((idx = ll_name_to_index(od)) == 0) {
|
---|
| 582 | bb_error_msg("Cannot find device \"%s\"", od);
|
---|
| 583 | }
|
---|
| 584 | filter.oif = idx;
|
---|
| 585 | filter.oifmask = -1;
|
---|
| 586 | }
|
---|
| 587 | }
|
---|
| 588 |
|
---|
| 589 | if (flush) {
|
---|
| 590 | char flushb[4096-512];
|
---|
| 591 |
|
---|
| 592 | if (filter.tb == -1) {
|
---|
| 593 | if (do_ipv6 != AF_INET6)
|
---|
| 594 | iproute_flush_cache();
|
---|
| 595 | if (do_ipv6 == AF_INET)
|
---|
| 596 | return 0;
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | filter.flushb = flushb;
|
---|
| 600 | filter.flushp = 0;
|
---|
| 601 | filter.flushe = sizeof(flushb);
|
---|
| 602 | filter.rth = &rth;
|
---|
| 603 |
|
---|
| 604 | for (;;) {
|
---|
| 605 | if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
|
---|
| 606 | perror("Cannot send dump request");
|
---|
| 607 | return -1;
|
---|
| 608 | }
|
---|
| 609 | filter.flushed = 0;
|
---|
| 610 | if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
|
---|
| 611 | bb_error_msg("Flush terminated\n");
|
---|
| 612 | return -1;
|
---|
| 613 | }
|
---|
| 614 | if (filter.flushed == 0) {
|
---|
| 615 | fflush(stdout);
|
---|
| 616 | return 0;
|
---|
| 617 | }
|
---|
| 618 | if (flush_update() < 0)
|
---|
| 619 | exit(1);
|
---|
| 620 | }
|
---|
| 621 | }
|
---|
| 622 |
|
---|
| 623 | if (filter.tb != -1) {
|
---|
| 624 | if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
|
---|
| 625 | bb_perror_msg_and_die("Cannot send dump request");
|
---|
| 626 | }
|
---|
| 627 | } else {
|
---|
| 628 | if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
|
---|
| 629 | bb_perror_msg_and_die("Cannot send dump request");
|
---|
| 630 | }
|
---|
| 631 | }
|
---|
| 632 |
|
---|
| 633 | if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
|
---|
| 634 | bb_error_msg_and_die("Dump terminated");
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | exit(0);
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 |
|
---|
| 641 | static int iproute_get(int argc, char **argv)
|
---|
| 642 | {
|
---|
| 643 | struct rtnl_handle rth;
|
---|
| 644 | struct {
|
---|
| 645 | struct nlmsghdr n;
|
---|
| 646 | struct rtmsg r;
|
---|
| 647 | char buf[1024];
|
---|
| 648 | } req;
|
---|
| 649 | char *idev = NULL;
|
---|
| 650 | char *odev = NULL;
|
---|
| 651 | int connected = 0;
|
---|
| 652 | int from_ok = 0;
|
---|
| 653 | static const char * const options[] =
|
---|
| 654 | { "from", "iif", "oif", "dev", "notify", "connected", "to", 0 };
|
---|
| 655 |
|
---|
| 656 | memset(&req, 0, sizeof(req));
|
---|
| 657 |
|
---|
| 658 | iproute_reset_filter();
|
---|
| 659 |
|
---|
| 660 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
|
---|
| 661 | req.n.nlmsg_flags = NLM_F_REQUEST;
|
---|
| 662 | req.n.nlmsg_type = RTM_GETROUTE;
|
---|
| 663 | req.r.rtm_family = preferred_family;
|
---|
| 664 | req.r.rtm_table = 0;
|
---|
| 665 | req.r.rtm_protocol = 0;
|
---|
| 666 | req.r.rtm_scope = 0;
|
---|
| 667 | req.r.rtm_type = 0;
|
---|
| 668 | req.r.rtm_src_len = 0;
|
---|
| 669 | req.r.rtm_dst_len = 0;
|
---|
| 670 | req.r.rtm_tos = 0;
|
---|
| 671 |
|
---|
| 672 | while (argc > 0) {
|
---|
| 673 | switch (compare_string_array(options, *argv)) {
|
---|
| 674 | case 0: /* from */
|
---|
| 675 | {
|
---|
| 676 | inet_prefix addr;
|
---|
| 677 | NEXT_ARG();
|
---|
| 678 | from_ok = 1;
|
---|
| 679 | get_prefix(&addr, *argv, req.r.rtm_family);
|
---|
| 680 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
| 681 | req.r.rtm_family = addr.family;
|
---|
| 682 | }
|
---|
| 683 | if (addr.bytelen) {
|
---|
| 684 | addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
|
---|
| 685 | }
|
---|
| 686 | req.r.rtm_src_len = addr.bitlen;
|
---|
| 687 | break;
|
---|
| 688 | }
|
---|
| 689 | case 1: /* iif */
|
---|
| 690 | NEXT_ARG();
|
---|
| 691 | idev = *argv;
|
---|
| 692 | break;
|
---|
| 693 | case 2: /* oif */
|
---|
| 694 | case 3: /* dev */
|
---|
| 695 | NEXT_ARG();
|
---|
| 696 | odev = *argv;
|
---|
| 697 | break;
|
---|
| 698 | case 4: /* notify */
|
---|
| 699 | req.r.rtm_flags |= RTM_F_NOTIFY;
|
---|
| 700 | break;
|
---|
| 701 | case 5: /* connected */
|
---|
| 702 | connected = 1;
|
---|
| 703 | break;
|
---|
| 704 | case 6: /* to */
|
---|
| 705 | NEXT_ARG();
|
---|
| 706 | default:
|
---|
| 707 | {
|
---|
| 708 | inet_prefix addr;
|
---|
| 709 | get_prefix(&addr, *argv, req.r.rtm_family);
|
---|
| 710 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
| 711 | req.r.rtm_family = addr.family;
|
---|
| 712 | }
|
---|
| 713 | if (addr.bytelen) {
|
---|
| 714 | addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
|
---|
| 715 | }
|
---|
| 716 | req.r.rtm_dst_len = addr.bitlen;
|
---|
| 717 | }
|
---|
| 718 | argc--; argv++;
|
---|
| 719 | }
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 | if (req.r.rtm_dst_len == 0) {
|
---|
| 723 | bb_error_msg_and_die("need at least destination address");
|
---|
| 724 | }
|
---|
| 725 |
|
---|
| 726 | if (rtnl_open(&rth, 0) < 0)
|
---|
| 727 | exit(1);
|
---|
| 728 |
|
---|
| 729 | ll_init_map(&rth);
|
---|
| 730 |
|
---|
| 731 | if (idev || odev) {
|
---|
| 732 | int idx;
|
---|
| 733 |
|
---|
| 734 | if (idev) {
|
---|
| 735 | if ((idx = ll_name_to_index(idev)) == 0) {
|
---|
| 736 | bb_error_msg("Cannot find device \"%s\"", idev);
|
---|
| 737 | return -1;
|
---|
| 738 | }
|
---|
| 739 | addattr32(&req.n, sizeof(req), RTA_IIF, idx);
|
---|
| 740 | }
|
---|
| 741 | if (odev) {
|
---|
| 742 | if ((idx = ll_name_to_index(odev)) == 0) {
|
---|
| 743 | bb_error_msg("Cannot find device \"%s\"", odev);
|
---|
| 744 | return -1;
|
---|
| 745 | }
|
---|
| 746 | addattr32(&req.n, sizeof(req), RTA_OIF, idx);
|
---|
| 747 | }
|
---|
| 748 | }
|
---|
| 749 |
|
---|
| 750 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
| 751 | req.r.rtm_family = AF_INET;
|
---|
| 752 | }
|
---|
| 753 |
|
---|
| 754 | if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
|
---|
| 755 | exit(2);
|
---|
| 756 | }
|
---|
| 757 |
|
---|
| 758 | if (connected && !from_ok) {
|
---|
| 759 | struct rtmsg *r = NLMSG_DATA(&req.n);
|
---|
| 760 | int len = req.n.nlmsg_len;
|
---|
| 761 | struct rtattr * tb[RTA_MAX+1];
|
---|
| 762 |
|
---|
| 763 | if (print_route(NULL, &req.n, (void*)stdout) < 0) {
|
---|
| 764 | bb_error_msg_and_die("An error :-)");
|
---|
| 765 | }
|
---|
| 766 |
|
---|
| 767 | if (req.n.nlmsg_type != RTM_NEWROUTE) {
|
---|
| 768 | bb_error_msg("Not a route?");
|
---|
| 769 | return -1;
|
---|
| 770 | }
|
---|
| 771 | len -= NLMSG_LENGTH(sizeof(*r));
|
---|
| 772 | if (len < 0) {
|
---|
| 773 | bb_error_msg("Wrong len %d", len);
|
---|
| 774 | return -1;
|
---|
| 775 | }
|
---|
| 776 |
|
---|
| 777 | memset(tb, 0, sizeof(tb));
|
---|
| 778 | parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
|
---|
| 779 |
|
---|
| 780 | if (tb[RTA_PREFSRC]) {
|
---|
| 781 | tb[RTA_PREFSRC]->rta_type = RTA_SRC;
|
---|
| 782 | r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
|
---|
| 783 | } else if (!tb[RTA_SRC]) {
|
---|
| 784 | bb_error_msg("Failed to connect the route");
|
---|
| 785 | return -1;
|
---|
| 786 | }
|
---|
| 787 | if (!odev && tb[RTA_OIF]) {
|
---|
| 788 | tb[RTA_OIF]->rta_type = 0;
|
---|
| 789 | }
|
---|
| 790 | if (tb[RTA_GATEWAY]) {
|
---|
| 791 | tb[RTA_GATEWAY]->rta_type = 0;
|
---|
| 792 | }
|
---|
| 793 | if (!idev && tb[RTA_IIF]) {
|
---|
| 794 | tb[RTA_IIF]->rta_type = 0;
|
---|
| 795 | }
|
---|
| 796 | req.n.nlmsg_flags = NLM_F_REQUEST;
|
---|
| 797 | req.n.nlmsg_type = RTM_GETROUTE;
|
---|
| 798 |
|
---|
| 799 | if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
|
---|
| 800 | exit(2);
|
---|
| 801 | }
|
---|
| 802 | }
|
---|
| 803 |
|
---|
| 804 | if (print_route(NULL, &req.n, (void*)stdout) < 0) {
|
---|
| 805 | bb_error_msg_and_die("An error :-)");
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | exit(0);
|
---|
| 809 | }
|
---|
| 810 |
|
---|
| 811 | int do_iproute(int argc, char **argv)
|
---|
| 812 | {
|
---|
| 813 | static const char * const ip_route_commands[] =
|
---|
| 814 | { "add", "append", "change", "chg", "delete", "del", "get",
|
---|
| 815 | "list", "show", "prepend", "replace", "test", "flush", 0 };
|
---|
| 816 | int command_num = 7;
|
---|
| 817 | unsigned int flags = 0;
|
---|
| 818 | int cmd = RTM_NEWROUTE;
|
---|
| 819 |
|
---|
| 820 | if (*argv) {
|
---|
| 821 | command_num = compare_string_array(ip_route_commands, *argv);
|
---|
| 822 | }
|
---|
| 823 | switch(command_num) {
|
---|
| 824 | case 0: /* add*/
|
---|
| 825 | flags = NLM_F_CREATE|NLM_F_EXCL;
|
---|
| 826 | break;
|
---|
| 827 | case 1: /* append */
|
---|
| 828 | flags = NLM_F_CREATE|NLM_F_APPEND;
|
---|
| 829 | break;
|
---|
| 830 | case 2: /* change */
|
---|
| 831 | case 3: /* chg */
|
---|
| 832 | flags = NLM_F_REPLACE;
|
---|
| 833 | break;
|
---|
| 834 | case 4: /* delete */
|
---|
| 835 | case 5: /* del */
|
---|
| 836 | cmd = RTM_DELROUTE;
|
---|
| 837 | break;
|
---|
| 838 | case 6: /* get */
|
---|
| 839 | return iproute_get(argc-1, argv+1);
|
---|
| 840 | case 7: /* list */
|
---|
| 841 | case 8: /* show */
|
---|
| 842 | return iproute_list_or_flush(argc-1, argv+1, 0);
|
---|
| 843 | case 9: /* prepend */
|
---|
| 844 | flags = NLM_F_CREATE;
|
---|
| 845 | case 10: /* replace */
|
---|
| 846 | flags = NLM_F_CREATE|NLM_F_REPLACE;
|
---|
| 847 | case 11: /* test */
|
---|
| 848 | flags = NLM_F_EXCL;
|
---|
| 849 | case 12: /* flush */
|
---|
| 850 | return iproute_list_or_flush(argc-1, argv+1, 1);
|
---|
| 851 | default:
|
---|
| 852 | bb_error_msg_and_die("Unknown command %s", *argv);
|
---|
| 853 | }
|
---|
| 854 |
|
---|
| 855 | return iproute_modify(cmd, flags, argc-1, argv+1);
|
---|
| 856 | }
|
---|