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#include <netlink/route/link/ipgre.h>
#include <netlink-private/netlink.h>
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link;
struct in_addr addr;
struct nl_sock *sk;
int err, if_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache);
if ( err < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if_index = rtnl_link_name2i(link_cache, "eno16777736");
if (!if_index) {
fprintf(stderr, "Unable to lookup eno16777736");
return -1;
}
link = rtnl_link_ipgre_alloc();
if(!link) {
nl_perror(err, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "ipgre-tun");
rtnl_link_ipgre_set_link(link, if_index);
inet_pton(AF_INET, "192.168.254.12", &addr.s_addr);
rtnl_link_ipgre_set_local(link, addr.s_addr);
inet_pton(AF_INET, "192.168.254.13", &addr.s_addr);
rtnl_link_ipgre_set_remote(link, addr.s_addr);
rtnl_link_ipgre_set_ttl(link, 64);
err = rtnl_link_add(sk, link, NLM_F_CREATE);
if (err < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
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