blob: c33cdcbbde21bb8dc6e52002fa31ae11a4349da8 [file] [log] [blame]
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +00001/*
2 * ipmroute.c "ip mroute".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <syslog.h>
17#include <fcntl.h>
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080018#include <inttypes.h>
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000019#include <sys/ioctl.h>
20#include <sys/socket.h>
osdl.org!shemminger03156412004-06-09 22:58:42 +000021#include <netinet/in.h>
22#include <arpa/inet.h>
23#include <string.h>
24
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000025#include <linux/netdevice.h>
26#include <linux/if.h>
27#include <linux/if_arp.h>
28#include <linux/sockios.h>
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000029
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080030#include <rt_names.h>
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000031#include "utils.h"
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080032#include "ip_common.h"
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000033
34static void usage(void) __attribute__((noreturn));
35
36static void usage(void)
37{
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080038 fprintf(stderr, "Usage: ip mroute show [ [ to ] PREFIX ] [ from PREFIX ] [ iif DEVICE ]\n");
Nicolas Dichtel2a898322012-12-14 09:56:47 -080039 fprintf(stderr, " [ table TABLE_ID ]\n");
40 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000041#if 0
42 fprintf(stderr, "Usage: ip mroute [ add | del ] DESTINATION from SOURCE [ iif DEVICE ] [ oif DEVICE ]\n");
43#endif
44 exit(-1);
45}
46
Stephen Hemminger56f5daa2016-03-21 11:52:19 -070047struct rtfilter {
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080048 int tb;
49 int af;
50 int iif;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000051 inet_prefix mdst;
52 inet_prefix msrc;
53} filter;
54
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080055int print_mroute(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000056{
Stephen Hemminger56f5daa2016-03-21 11:52:19 -070057 FILE *fp = (FILE *)arg;
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080058 struct rtmsg *r = NLMSG_DATA(n);
59 int len = n->nlmsg_len;
Stephen Hemminger56f5daa2016-03-21 11:52:19 -070060 struct rtattr *tb[RTA_MAX+1];
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080061 char obuf[256];
Stephen Hemminger56f5daa2016-03-21 11:52:19 -070062
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080063 SPRINT_BUF(b1);
64 __u32 table;
65 int iif = 0;
66 int family;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000067
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080068 if ((n->nlmsg_type != RTM_NEWROUTE &&
Nicolas Dichtel505f9182015-04-22 10:27:07 +020069 n->nlmsg_type != RTM_DELROUTE)) {
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080070 fprintf(stderr, "Not a multicast route: %08x %08x %08x\n",
71 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
72 return 0;
Thomas Jarosch67ef60a2011-10-03 05:24:08 +000073 }
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080074 len -= NLMSG_LENGTH(sizeof(*r));
75 if (len < 0) {
76 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
77 return -1;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000078 }
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080079 if (r->rtm_type != RTN_MULTICAST) {
80 fprintf(stderr, "Not a multicast route (type: %s)\n",
81 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
82 return 0;
Thomas Jarosche588a7d2011-10-03 05:24:18 +000083 }
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000084
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080085 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
86 table = rtm_get_table(r, tb);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000087
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080088 if (filter.tb > 0 && filter.tb != table)
89 return 0;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000090
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080091 if (tb[RTA_IIF])
Stephen Hemminger56f5daa2016-03-21 11:52:19 -070092 iif = *(int *)RTA_DATA(tb[RTA_IIF]);
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080093 if (filter.iif && filter.iif != iif)
94 return 0;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000095
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -080096 if (filter.af && filter.af != r->rtm_family)
97 return 0;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +000098
Mazhar Rana45b01c42015-06-11 21:37:36 +053099 if (tb[RTA_DST] && filter.mdst.bitlen > 0) {
100 inet_prefix dst;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000101
Mazhar Rana45b01c42015-06-11 21:37:36 +0530102 memset(&dst, 0, sizeof(dst));
103 dst.family = r->rtm_family;
104 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), RTA_PAYLOAD(tb[RTA_DST]));
105 if (inet_addr_match(&dst, &filter.mdst, filter.mdst.bitlen))
106 return 0;
107 }
108
109 if (tb[RTA_SRC] && filter.msrc.bitlen > 0) {
110 inet_prefix src;
111
112 memset(&src, 0, sizeof(src));
113 src.family = r->rtm_family;
114 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), RTA_PAYLOAD(tb[RTA_SRC]));
115 if (inet_addr_match(&src, &filter.msrc, filter.msrc.bitlen))
116 return 0;
117 }
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000118
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800119 family = r->rtm_family == RTNL_FAMILY_IPMR ? AF_INET : AF_INET6;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000120
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800121 if (n->nlmsg_type == RTM_DELROUTE)
122 fprintf(fp, "Deleted ");
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000123
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800124 if (tb[RTA_SRC])
125 len = snprintf(obuf, sizeof(obuf),
Phil Sutter7faf1582016-03-22 19:35:18 +0100126 "(%s, ", rt_addr_n2a_rta(family, tb[RTA_SRC]));
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800127 else
128 len = sprintf(obuf, "(unknown, ");
129 if (tb[RTA_DST])
130 snprintf(obuf + len, sizeof(obuf) - len,
Phil Sutter7faf1582016-03-22 19:35:18 +0100131 "%s)", rt_addr_n2a_rta(family, tb[RTA_DST]));
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800132 else
133 snprintf(obuf + len, sizeof(obuf) - len, "unknown) ");
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000134
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800135 fprintf(fp, "%-32s Iif: ", obuf);
136 if (iif)
137 fprintf(fp, "%-10s ", ll_index_to_name(iif));
138 else
139 fprintf(fp, "unresolved ");
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000140
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800141 if (tb[RTA_MULTIPATH]) {
142 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
143 int first = 1;
144
145 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
146
147 for (;;) {
148 if (len < sizeof(*nh))
149 break;
150 if (nh->rtnh_len > len)
151 break;
152
153 if (first) {
154 fprintf(fp, "Oifs: ");
155 first = 0;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000156 }
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800157 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
158 if (nh->rtnh_hops > 1)
159 fprintf(fp, "(ttl %d) ", nh->rtnh_hops);
160 else
161 fprintf(fp, " ");
162 len -= NLMSG_ALIGN(nh->rtnh_len);
163 nh = RTNH_NEXT(nh);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000164 }
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000165 }
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800166 if (show_stats && tb[RTA_MFC_STATS]) {
167 struct rta_mfc_stats *mfcs = RTA_DATA(tb[RTA_MFC_STATS]);
168
169 fprintf(fp, "%s %"PRIu64" packets, %"PRIu64" bytes", _SL_,
170 (uint64_t)mfcs->mfcs_packets,
171 (uint64_t)mfcs->mfcs_bytes);
172 if (mfcs->mfcs_wrong_if)
173 fprintf(fp, ", %"PRIu64" arrived on wrong iif.",
174 (uint64_t)mfcs->mfcs_wrong_if);
175 }
176 fprintf(fp, "\n");
177 fflush(fp);
178 return 0;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000179}
180
vadimk093b7642014-10-20 12:25:17 +0300181void ipmroute_reset_filter(int ifindex)
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800182{
183 memset(&filter, 0, sizeof(filter));
184 filter.mdst.bitlen = -1;
185 filter.msrc.bitlen = -1;
vadimk093b7642014-10-20 12:25:17 +0300186 filter.iif = ifindex;
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800187}
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000188
189static int mroute_list(int argc, char **argv)
190{
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800191 char *id = NULL;
192 int family;
193
vadimk093b7642014-10-20 12:25:17 +0300194 ipmroute_reset_filter(0);
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800195 if (preferred_family == AF_UNSPEC)
196 family = AF_INET;
197 else
198 family = AF_INET6;
199 if (family == AF_INET) {
200 filter.af = RTNL_FAMILY_IPMR;
201 filter.tb = RT_TABLE_DEFAULT; /* for backward compatibility */
202 } else
203 filter.af = RTNL_FAMILY_IP6MR;
204
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000205 while (argc > 0) {
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800206 if (matches(*argv, "table") == 0) {
207 __u32 tid;
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700208
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000209 NEXT_ARG();
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800210 if (rtnl_rttable_a2n(&tid, *argv)) {
211 if (strcmp(*argv, "all") == 0) {
212 filter.tb = 0;
213 } else if (strcmp(*argv, "help") == 0) {
214 usage();
215 } else {
216 invarg("table id value is invalid\n", *argv);
217 }
218 } else
219 filter.tb = tid;
220 } else if (strcmp(*argv, "iif") == 0) {
221 NEXT_ARG();
222 id = *argv;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000223 } else if (matches(*argv, "from") == 0) {
224 NEXT_ARG();
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800225 get_prefix(&filter.msrc, *argv, family);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000226 } else {
227 if (strcmp(*argv, "to") == 0) {
228 NEXT_ARG();
229 }
230 if (matches(*argv, "help") == 0)
231 usage();
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800232 get_prefix(&filter.mdst, *argv, family);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000233 }
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800234 argc--; argv++;
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000235 }
236
Nicolas Dichtele34d3dc2012-12-14 10:08:17 -0800237 ll_init_map(&rth);
238
239 if (id) {
240 int idx;
241
242 if ((idx = ll_name_to_index(id)) == 0) {
243 fprintf(stderr, "Cannot find device \"%s\"\n", id);
244 return -1;
245 }
246 filter.iif = idx;
247 }
248
249 if (rtnl_wilddump_request(&rth, filter.af, RTM_GETROUTE) < 0) {
250 perror("Cannot send dump request");
251 return 1;
252 }
253
254 if (rtnl_dump_filter(&rth, print_mroute, stdout) < 0) {
255 fprintf(stderr, "Dump terminated\n");
256 exit(1);
257 }
258
259 exit(0);
osdl.org!shemmingeraba5acd2004-04-15 20:56:59 +0000260}
261
262int do_multiroute(int argc, char **argv)
263{
264 if (argc < 1)
265 return mroute_list(0, NULL);
266#if 0
267 if (matches(*argv, "add") == 0)
268 return mroute_modify(RTM_NEWADDR, argc-1, argv+1);
269 if (matches(*argv, "delete") == 0)
270 return mroute_modify(RTM_DELADDR, argc-1, argv+1);
271 if (matches(*argv, "get") == 0)
272 return mroute_get(argc-1, argv+1);
273#endif
274 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
275 || matches(*argv, "lst") == 0)
276 return mroute_list(argc-1, argv+1);
277 if (matches(*argv, "help") == 0)
278 usage();
279 fprintf(stderr, "Command \"%s\" is unknown, try \"ip mroute help\".\n", *argv);
280 exit(-1);
281}