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 #include "ovs-router.h"
36 ovs_router_lookup(ovs_be32 ip, char name[], ovs_be32 *gw)
43 struct rt_msghdr *rtm = &rtmsg.rtm;
44 struct sockaddr_dl *ifp = NULL;
45 struct sockaddr_in *sin;
48 int i, len, namelen, rtsock;
49 const pid_t pid = getpid();
51 rtsock = socket(PF_ROUTE, SOCK_RAW, 0);
55 memset(&rtmsg, 0, sizeof(rtmsg));
57 rtm->rtm_msglen = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in);
58 rtm->rtm_version = RTM_VERSION;
59 rtm->rtm_type = RTM_GET;
60 rtm->rtm_addrs = RTA_DST | RTA_IFP;
63 sin = (struct sockaddr_in *)(rtm + 1);
64 sin->sin_len = len = sizeof(struct sockaddr_in);
65 sin->sin_family = AF_INET;
66 sin->sin_addr.s_addr = ip;
68 if ((write(rtsock, (char *)&rtmsg, rtm->rtm_msglen)) < 0) {
74 len = read(rtsock, (char *)&rtmsg, sizeof(rtmsg));
75 } while (len > 0 && (rtmsg.rtm.rtm_seq != seq ||
76 rtmsg.rtm.rtm_pid != pid));
84 sa = (struct sockaddr *)(rtm + 1);
85 for (i = 1; i; i <<= 1) {
86 if (rtm->rtm_addrs & i) {
87 if (i == RTA_IFP && sa->sa_family == AF_LINK &&
88 ALIGNED_CAST(struct sockaddr_dl *, sa)->sdl_nlen) {
89 ifp = ALIGNED_CAST(struct sockaddr_dl *, sa);
90 namelen = ifp->sdl_nlen;
91 if (namelen > IFNAMSIZ - 1)
92 namelen = IFNAMSIZ - 1;
93 memcpy(name, ifp->sdl_data, namelen);
98 #if defined(__FreeBSD__)
99 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
100 #elif defined(__NetBSD__)
101 sa = (struct sockaddr *)((char *)sa + RT_ROUNDUP(sa->sa_len));
111 route_table_get_change_seq(void)
117 route_table_init(void)
122 route_table_run(void)
127 route_table_wait(void)
132 ovs_router_init(void)