int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_sock *sk;
int err;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
link = rtnl_link_alloc();
rtnl_link_set_name(link, "my_bond");
if ((err = rtnl_link_set_type(link, "bond")) < 0) {
nl_perror(err, "Unable to set link info type");
return err;
}
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;
}
/**
* Create a new kernel bonding device
* @arg sock netlink socket
* @arg name name of bonding device or NULL
* @arg opts bonding options (currently unused)
*
* Creates a new bonding device in the kernel. If no name is
* provided, the kernel will automatically pick a name of the
* form "type%d" (e.g. bond0, vlan1, etc.)
*
* The \a opts argument is currently unused. In the future, it
* may be used to carry additional bonding options to be set
* when creating the bonding device.
*
* @note When letting the kernel assign a name, it will become
* difficult to retrieve the interface afterwards because
* you have to guess the name the kernel has chosen. It is
* therefore not recommended to not provide a device name.
*
* @see rtnl_link_bond_enslave()
* @see rtnl_link_bond_release()
*
* @return 0 on success or a negative error code
*/
int rtnl_link_bond_add(struct nl_sock *sock, const char *name,
struct rtnl_link *opts)
{
struct rtnl_link *link;
int err;
if (!(link = rtnl_link_alloc()))
return -NLE_NOMEM;
if (!name) {
if (opts)
name = rtnl_link_get_name(opts);
if (!name)
return -NLE_MISSING_ATTR;
}
if ((err = rtnl_link_set_type(link, "bond")) < 0)
goto errout;
rtnl_link_set_name(link, name);
err = rtnl_link_add(sock, link, NLM_F_CREATE);
errout:
rtnl_link_put(link);
return err;
}
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link, *link2;
struct nl_sock *sk;
uint32_t tb_id;
int err;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
if (!(link = rtnl_link_vrf_alloc())) {
fprintf(stderr, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "vrf-red");
if ((err = rtnl_link_vrf_set_tableid(link, 10)) < 0) {
nl_perror(err, "Unable to set VRF table id");
return err;
}
if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
nl_perror(err, "Unable to add link");
return err;
}
if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if (!(link2 = rtnl_link_get_by_name(link_cache, "vrf-red"))) {
fprintf(stderr, "Unable to lookup vrf-red");
return -1;
}
if ((err = rtnl_link_vrf_get_tableid(link2, &tb_id)) < 0) {
nl_perror(err, "Unable to get VRF table id");
return err;
}
if (tb_id != 10) {
fprintf(stderr, "Mismatch with VRF table id\n");
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
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_sit_alloc();
if(!link) {
nl_perror(err, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "sit-tun");
rtnl_link_sit_set_link(link, if_index);
inet_pton(AF_INET, "192.168.254.12", &addr.s_addr);
rtnl_link_sit_set_local(link, addr.s_addr);
inet_pton(AF_INET, "192.168.254.13", &addr.s_addr);
rtnl_link_sit_set_remote(link, addr.s_addr);
rtnl_link_sit_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;
}
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link;
struct in6_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, "ens33");
if (!if_index) {
fprintf(stderr, "Unable to lookup ens33");
return -1;
}
link = rtnl_link_ip6_tnl_alloc();
if(!link) {
nl_perror(err, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "ip6tnl-tun");
rtnl_link_ip6_tnl_set_link(link, if_index);
inet_pton(AF_INET6, "2607:f0d0:1002:51::4", &addr);
rtnl_link_ip6_tnl_set_local(link, &addr);
inet_pton(AF_INET6, "2607:f0d0:1002:52::5", &addr);
rtnl_link_ip6_tnl_set_remote(link, &addr);
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;
}
/**
* Create a new kernel bridge device
* @arg sk netlink socket
* @arg name name of the bridge device or NULL
*
* Creates a new bridge device in the kernel. If no name is
* provided, the kernel will automatically pick a name of the
* form "type%d" (e.g. bridge0, vlan1, etc.)
*
* @return 0 on success or a negative error code
*/
int rtnl_link_bridge_add(struct nl_sock *sk, const char *name)
{
int err;
struct rtnl_link *link;
if (!(link = rtnl_link_bridge_alloc()))
return -NLE_NOMEM;
if(name)
rtnl_link_set_name(link, name);
err = rtnl_link_add(sk, link, NLM_F_CREATE);
rtnl_link_put(link);
return err;
}
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();
}
/*
* Create a bridge interface. Returns 0 if successful, libnl error if not.
*/
static int create_bridge_link(struct nl_sock *sk, const char *name)
{
struct rtnl_link *l_bridge;
int err;
l_bridge = rtnl_link_bridge_alloc();
assert(l_bridge);
rtnl_link_set_name(l_bridge, name);
err = rtnl_link_add(sk, l_bridge, NLM_F_CREATE);
if (err < 0) {
rtnl_link_put(l_bridge);
return err;
}
rtnl_link_put(l_bridge);
return 0;
}
int create_bridge(struct nl_sock *sk, struct nl_cache *link_cache, const char *name) {
struct rtnl_link *link;
int err;
link = rtnl_link_alloc();
if ((err = rtnl_link_set_type(link, "bridge")) < 0) {
rtnl_link_put(link);
return err;
}
rtnl_link_set_name(link, name);
if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
return err;
}
rtnl_link_put(link);
return 0;
}
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;
}
int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_cache *link_cache;
struct nl_sock *sk;
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;
}
if (!(link = rtnl_link_ipvlan_alloc())) {
fprintf(stderr, "Unable to allocate link");
return -1;
}
rtnl_link_set_link(link, master_index);
rtnl_link_ipvlan_set_mode(link, rtnl_link_ipvlan_str2mode("l2"));
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;
}
/**
* Create a new kernel veth device
* @arg sock netlink socket
* @arg name name of the veth device or NULL
* @arg peer_name name of its peer or NULL
* @arg pid pid of the process in the new netns
*
* Creates a new veth device pair in the kernel and move the peer
* to the network namespace where the process is. If no name is
* provided, the kernel will automatically pick a name of the
* form "veth%d" (e.g. veth0, veth1, etc.)
*
* @return 0 on success or a negative error code
*/
int rtnl_link_veth_add(struct nl_sock *sock, const char *name,
const char *peer_name, pid_t pid)
{
struct rtnl_link *link, *peer;
int err = -NLE_NOMEM;
if (!(link = rtnl_link_veth_alloc()))
return -NLE_NOMEM;
peer = rtnl_link_veth_get_peer(link);
if (name && peer_name) {
rtnl_link_set_name(link, name);
rtnl_link_set_name(peer, peer_name);
}
rtnl_link_set_ns_pid(peer, pid);
err = rtnl_link_add(sock, link, NLM_F_CREATE);
rtnl_link_put(peer);
rtnl_link_put(link);
return err;
}
/*
* Add a vlan interface with name 'vlan_if_name', VLAN ID 'vid' and
* tagged interface 'if_name'.
*
* returns -1 on error
* returns 1 if the interface already exists
* returns 0 otherwise
*/
int vlan_add(const char *if_name, int vid, const char *vlan_if_name)
{
int ret = -1;
struct nl_sock *handle = NULL;
struct nl_cache *cache = NULL;
struct rtnl_link *rlink = NULL;
int if_idx = 0;
wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d, "
"vlan_if_name=%s)", if_name, vid, vlan_if_name);
if ((os_strlen(if_name) + 1) > IFNAMSIZ) {
wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
if_name);
return -1;
}
if ((os_strlen(vlan_if_name) + 1) > IFNAMSIZ) {
wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
vlan_if_name);
return -1;
}
handle = nl_socket_alloc();
if (!handle) {
wpa_printf(MSG_ERROR, "VLAN: failed to open netlink socket");
goto vlan_add_error;
}
if (nl_connect(handle, NETLINK_ROUTE) < 0) {
wpa_printf(MSG_ERROR, "VLAN: failed to connect to netlink");
goto vlan_add_error;
}
if (rtnl_link_alloc_cache(handle, AF_UNSPEC, &cache) < 0) {
cache = NULL;
wpa_printf(MSG_ERROR, "VLAN: failed to alloc cache");
goto vlan_add_error;
}
if (!(if_idx = rtnl_link_name2i(cache, if_name))) {
/* link does not exist */
wpa_printf(MSG_ERROR, "VLAN: interface %s does not exist",
if_name);
goto vlan_add_error;
}
if ((rlink = rtnl_link_get_by_name(cache, vlan_if_name))) {
/* link does exist */
rtnl_link_put(rlink);
rlink = NULL;
wpa_printf(MSG_ERROR, "VLAN: interface %s already exists",
vlan_if_name);
ret = 1;
goto vlan_add_error;
}
rlink = rtnl_link_alloc();
if (!rlink) {
wpa_printf(MSG_ERROR, "VLAN: failed to allocate new link");
goto vlan_add_error;
}
if (rtnl_link_set_type(rlink, "vlan") < 0) {
wpa_printf(MSG_ERROR, "VLAN: failed to set link type");
goto vlan_add_error;
}
rtnl_link_set_link(rlink, if_idx);
rtnl_link_set_name(rlink, vlan_if_name);
if (rtnl_link_vlan_set_id(rlink, vid) < 0) {
wpa_printf(MSG_ERROR, "VLAN: failed to set link vlan id");
goto vlan_add_error;
}
if (rtnl_link_add(handle, rlink, NLM_F_CREATE) < 0) {
wpa_printf(MSG_ERROR, "VLAN: failed to create link %s for "
"vlan %d on %s (%d)",
vlan_if_name, vid, if_name, if_idx);
goto vlan_add_error;
}
ret = 0;
vlan_add_error:
if (rlink)
rtnl_link_put(rlink);
if (cache)
nl_cache_free(cache);
if (handle)
nl_socket_free(handle);
return ret;
}