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>
32 VLOG_DEFINE_THIS_MODULE(route_table);
35 static unsigned int register_count = 0;
38 route_table_get_name(ovs_be32 ip, char name[IFNAMSIZ])
45 struct rt_msghdr *rtm = &rtmsg.rtm;
46 struct sockaddr_dl *ifp = NULL;
47 struct sockaddr_in *sin;
50 int i, len, namelen, rtsock;
52 rtsock = socket(PF_ROUTE, SOCK_RAW, 0);
56 memset(&rtmsg, 0, sizeof(rtmsg));
58 rtm->rtm_msglen = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in);
59 rtm->rtm_version = RTM_VERSION;
60 rtm->rtm_type = RTM_GET;
61 rtm->rtm_addrs = RTA_DST | RTA_IFP;
64 sin = (struct sockaddr_in *)(rtm + 1);
65 sin->sin_len = len = sizeof(struct sockaddr_in);
66 sin->sin_family = AF_INET;
67 sin->sin_addr.s_addr = ip;
69 if ((write(rtsock, (char *)&rtmsg, rtm->rtm_msglen)) < 0) {
75 len = read(rtsock, (char *)&rtmsg, sizeof(rtmsg));
76 } while (len > 0 && (rtmsg.rtm.rtm_seq != seq ||
77 rtmsg.rtm.rtm_pid != pid));
85 sa = (struct sockaddr *)(rtm + 1);
86 for (i = 1; i; i <<= 1) {
87 if (rtm->rtm_addrs & i) {
88 if (i == RTA_IFP && sa->sa_family == AF_LINK &&
89 ((struct sockaddr_dl *)sa)->sdl_nlen) {
90 ifp = (struct sockaddr_dl *)sa;
91 namelen = ifp->sdl_nlen;
92 if (namelen > IFNAMSIZ - 1)
93 namelen = IFNAMSIZ - 1;
94 memcpy(name, ifp->sdl_data, namelen);
98 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
105 route_table_register()
116 route_table_unregister()
122 route_table_run(void)
127 route_table_wait(void)