TError TNlLink::AddVeth(const std::string &name,
const std::string &hw,
int mtu, int nsFd) {
struct rtnl_link *veth, *peer;
int ret;
peer = rtnl_link_veth_alloc();
if (!peer)
return TError(EError::Unknown, "Unable to allocate veth");
rtnl_link_set_name(peer, rtnl_link_get_name(Link));
veth = rtnl_link_veth_get_peer(peer);
rtnl_link_set_name(veth, name.c_str());
if (nsFd >= 0)
rtnl_link_set_ns_fd(veth, nsFd);
if (mtu > 0) {
rtnl_link_set_mtu(peer, mtu);
rtnl_link_set_mtu(veth, mtu);
}
if (!hw.empty()) {
TNlAddr addr;
TError error = addr.Parse(AF_LLC, hw.c_str());
if (error)
return error;
rtnl_link_set_addr(veth, addr.Addr);
}
rtnl_link_set_flags(peer, IFF_UP);
Dump("add", veth);
rtnl_link_put(veth);
Dump("add", peer);
ret = rtnl_link_add(GetSock(), peer, NLM_F_CREATE | NLM_F_EXCL);
if (ret < 0) {
rtnl_link_put(peer);
return Error(ret, "Cannot add veth");
}
rtnl_link_put(peer);
return Load();
}
int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_cache *link_cache;
struct nl_sock *sk;
struct nl_addr* addr;
int err, master_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if (!(master_index = rtnl_link_name2i(link_cache, "eth0"))) {
fprintf(stderr, "Unable to lookup eth0");
return -1;
}
link = rtnl_link_macvtap_alloc();
rtnl_link_set_link(link, master_index);
addr = nl_addr_build(AF_LLC, ether_aton("00:11:22:33:44:55"), ETH_ALEN);
rtnl_link_set_addr(link, addr);
nl_addr_put(addr);
rtnl_link_macvtap_set_mode(link, rtnl_link_macvtap_str2mode("bridge"));
if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
