1 /* SPDX-License-Identifier: LGPL-2.1-only */
2
3 #include "nl-default.h"
4
5 #include <netlink/route/link/ipgre.h>
6
main(int argc,char * argv[])7 int main(int argc, char *argv[])
8 {
9 struct nl_cache *link_cache;
10 struct rtnl_link *link;
11 struct in_addr addr;
12 struct nl_sock *sk;
13 int err, if_index;
14
15 sk = nl_socket_alloc();
16 if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
17 nl_perror(err, "Unable to connect socket");
18 return err;
19 }
20
21 err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache);
22 if ( err < 0) {
23 nl_perror(err, "Unable to allocate cache");
24 return err;
25 }
26
27 if_index = rtnl_link_name2i(link_cache, "eno16777736");
28 if (!if_index) {
29 fprintf(stderr, "Unable to lookup eno16777736");
30 return -1;
31 }
32
33 link = rtnl_link_ipgre_alloc();
34 if(!link) {
35 nl_perror(err, "Unable to allocate link");
36 return -1;
37
38 }
39 rtnl_link_set_name(link, "ipgre-tun");
40 rtnl_link_ipgre_set_link(link, if_index);
41
42 inet_pton(AF_INET, "192.168.254.12", &addr.s_addr);
43 rtnl_link_ipgre_set_local(link, addr.s_addr);
44
45 inet_pton(AF_INET, "192.168.254.13", &addr.s_addr);
46 rtnl_link_ipgre_set_remote(link, addr.s_addr);
47
48 rtnl_link_ipgre_set_ttl(link, 64);
49 err = rtnl_link_add(sk, link, NLM_F_CREATE);
50 if (err < 0) {
51 nl_perror(err, "Unable to add link");
52 return err;
53 }
54
55 rtnl_link_put(link);
56 nl_close(sk);
57
58 return 0;
59 }
60