2 * ipmroute.c "ip mroute".
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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
18 #include <sys/ioctl.h>
19 #include <sys/socket.h>
20 #include <netinet/in.h>
21 #include <arpa/inet.h>
24 #include <linux/netdevice.h>
26 #include <linux/if_arp.h>
27 #include <linux/sockios.h>
34 static void usage(void) __attribute__((noreturn));
36 static void usage(void)
38 fprintf(stderr, "Usage: ip mroute show [ PREFIX ] [ from PREFIX ] [ iif DEVICE ]\n");
40 fprintf(stderr, "Usage: ip mroute [ add | del ] DESTINATION from SOURCE [ iif DEVICE ] [ oif DEVICE ]\n");
45 static char *viftable[32];
53 static void read_viftable(void)
56 FILE *fp = fopen("/proc/net/ip_mr_vif", "r");
61 if (!fgets(buf, sizeof(buf), fp)) {
65 while (fgets(buf, sizeof(buf), fp)) {
69 if (sscanf(buf, "%d%s", &vifi, dev) < 2)
72 if (vifi<0 || vifi>31)
75 viftable[vifi] = strdup(dev);
80 static void read_mroute_list(FILE *ofp)
83 FILE *fp = fopen("/proc/net/ip_mr_cache", "r");
88 if (!fgets(buf, sizeof(buf), fp)) {
93 while (fgets(buf, sizeof(buf), fp)) {
94 inet_prefix maddr, msrc;
103 if (sscanf(buf, "%x%x%d%u%u%u %[^\n]",
104 maddr.data, msrc.data, &vifi,
105 &pkts, &b, &w, oiflist) < 6)
108 if (vifi!=-1 && (vifi < 0 || vifi>31))
111 if (filter_dev[0] && (vifi<0 || strcmp(filter_dev, viftable[vifi])))
113 if (filter.mdst.family && inet_addr_match(&maddr, &filter.mdst, filter.mdst.bitlen))
115 if (filter.msrc.family && inet_addr_match(&msrc, &filter.msrc, filter.msrc.bitlen))
118 snprintf(obuf, sizeof(obuf), "(%s, %s)",
119 format_host(AF_INET, 4, &msrc.data[0], sbuf, sizeof(sbuf)),
120 format_host(AF_INET, 4, &maddr.data[0], mbuf, sizeof(mbuf)));
122 fprintf(ofp, "%-32s Iif: ", obuf);
125 fprintf(ofp, "unresolved ");
127 fprintf(ofp, "%-10s ", viftable[vifi]);
134 fprintf(ofp, "Oifs: ");
137 next = strchr(p, ' ');
142 if (sscanf(p, "%d:%d", &ovifi, &ottl)<2) {
148 fprintf(ofp, "%s", viftable[ovifi]);
150 fprintf(ofp, "(ttl %d) ", ovifi);
156 if (show_stats && b) {
157 fprintf(ofp, "%s %u packets, %u bytes", _SL_, pkts, b);
159 fprintf(ofp, ", %u arrived on wrong iif.", w);
167 static int mroute_list(int argc, char **argv)
170 if (strcmp(*argv, "iif") == 0) {
172 strncpy(filter_dev, *argv, sizeof(filter_dev)-1);
173 } else if (matches(*argv, "from") == 0) {
175 get_prefix(&filter.msrc, *argv, AF_INET);
177 if (strcmp(*argv, "to") == 0) {
180 if (matches(*argv, "help") == 0)
182 get_prefix(&filter.mdst, *argv, AF_INET);
188 read_mroute_list(stdout);
192 int do_multiroute(int argc, char **argv)
195 return mroute_list(0, NULL);
197 if (matches(*argv, "add") == 0)
198 return mroute_modify(RTM_NEWADDR, argc-1, argv+1);
199 if (matches(*argv, "delete") == 0)
200 return mroute_modify(RTM_DELADDR, argc-1, argv+1);
201 if (matches(*argv, "get") == 0)
202 return mroute_get(argc-1, argv+1);
204 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
205 || matches(*argv, "lst") == 0)
206 return mroute_list(argc-1, argv+1);
207 if (matches(*argv, "help") == 0)
209 fprintf(stderr, "Command \"%s\" is unknown, try \"ip mroute help\".\n", *argv);