2 * Copyright (c) 2012 Ed Maste. All rights reserved.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "route-table.h"
21 #include <sys/socket.h>
22 #include <sys/types.h>
25 #include <net/route.h>
26 #include <net/if_dl.h>
27 #include <netinet/in.h>
34 VLOG_DEFINE_THIS_MODULE(route_table);
37 static unsigned int register_count = 0;
40 route_table_get_name(ovs_be32 ip, char name[IFNAMSIZ])
47 struct rt_msghdr *rtm = &rtmsg.rtm;
48 struct sockaddr_dl *ifp = NULL;
49 struct sockaddr_in *sin;
52 int i, len, namelen, rtsock;
54 rtsock = socket(PF_ROUTE, SOCK_RAW, 0);
58 memset(&rtmsg, 0, sizeof(rtmsg));
60 rtm->rtm_msglen = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in);
61 rtm->rtm_version = RTM_VERSION;
62 rtm->rtm_type = RTM_GET;
63 rtm->rtm_addrs = RTA_DST | RTA_IFP;
66 sin = (struct sockaddr_in *)(rtm + 1);
67 sin->sin_len = len = sizeof(struct sockaddr_in);
68 sin->sin_family = AF_INET;
69 sin->sin_addr.s_addr = ip;
71 if ((write(rtsock, (char *)&rtmsg, rtm->rtm_msglen)) < 0) {
77 len = read(rtsock, (char *)&rtmsg, sizeof(rtmsg));
78 } while (len > 0 && (rtmsg.rtm.rtm_seq != seq ||
79 rtmsg.rtm.rtm_pid != pid));
87 sa = (struct sockaddr *)(rtm + 1);
88 for (i = 1; i; i <<= 1) {
89 if (rtm->rtm_addrs & i) {
90 if (i == RTA_IFP && sa->sa_family == AF_LINK &&
91 ((struct sockaddr_dl *)sa)->sdl_nlen) {
92 ifp = (struct sockaddr_dl *)sa;
93 namelen = ifp->sdl_nlen;
94 if (namelen > IFNAMSIZ - 1)
95 namelen = IFNAMSIZ - 1;
96 memcpy(name, ifp->sdl_data, namelen);
100 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
107 route_table_register(void)
118 route_table_unregister(void)
124 route_table_run(void)
129 route_table_wait(void)