Commit 5dac94e1 authored by James Chapman's avatar James Chapman Committed by David S. Miller
Browse files

l2tp: let iproute2 create L2TPv3 IP tunnels using IPv6 



The netlink API lets users create unmanaged L2TPv3 tunnels using
iproute2. Until now, a request to create an unmanaged L2TPv3 IP
encapsulation tunnel over IPv6 would be rejected with
EPROTONOSUPPORT. Now that l2tp_ip6 implements sockets for L2TP IP
encapsulation over IPv6, we can add support for that tunnel type.

Signed-off-by: default avatarJames Chapman <jchapman@katalix.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a32e0eec

net/l2tp/l2tp_core.c

+50 −22
Original line number Diff line number Diff line
@@ -1368,6 +1368,7 @@ static int l2tp_tunnel_sock_create(u32 tunnel_id, u32 peer_tunnel_id, struct l2t 
	struct sockaddr_in udp_addr;

#if IS_ENABLED(CONFIG_IPV6)

	struct sockaddr_in6 udp6_addr;

	struct sockaddr_l2tpip6 ip6_addr;

#endif

	struct sockaddr_l2tpip ip_addr;

	struct socket *sock = NULL;
@@ -1437,12 +1438,37 @@ static int l2tp_tunnel_sock_create(u32 tunnel_id, u32 peer_tunnel_id, struct l2t 
	case L2TP_ENCAPTYPE_IP:

#if IS_ENABLED(CONFIG_IPV6)

		if (cfg->local_ip6 && cfg->peer_ip6) {

			/* IP encap over IPv6 not yet supported */

			err = -EPROTONOSUPPORT;

			err = sock_create(AF_INET6, SOCK_DGRAM, IPPROTO_L2TP,

					  sockp);

			if (err < 0)

				goto out;

		}



			sock = *sockp;



			memset(&ip6_addr, 0, sizeof(ip6_addr));

			ip6_addr.l2tp_family = AF_INET6;

			memcpy(&ip6_addr.l2tp_addr, cfg->local_ip6,

			       sizeof(ip6_addr.l2tp_addr));

			ip6_addr.l2tp_conn_id = tunnel_id;

			err = kernel_bind(sock, (struct sockaddr *) &ip6_addr,

					  sizeof(ip6_addr));

			if (err < 0)

				goto out;



			ip6_addr.l2tp_family = AF_INET6;

			memcpy(&ip6_addr.l2tp_addr, cfg->peer_ip6,

			       sizeof(ip6_addr.l2tp_addr));

			ip6_addr.l2tp_conn_id = peer_tunnel_id;

			err = kernel_connect(sock,

					     (struct sockaddr *) &ip6_addr,

					     sizeof(ip6_addr), 0);

			if (err < 0)

				goto out;

		} else

#endif

		err = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_L2TP, sockp);

		{

			err = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_L2TP,

					  sockp);

			if (err < 0)

				goto out;
@@ -1452,17 +1478,19 @@ static int l2tp_tunnel_sock_create(u32 tunnel_id, u32 peer_tunnel_id, struct l2t 
			ip_addr.l2tp_family = AF_INET;

			ip_addr.l2tp_addr = cfg->local_ip;

			ip_addr.l2tp_conn_id = tunnel_id;

		err = kernel_bind(sock, (struct sockaddr *) &ip_addr, sizeof(ip_addr));

			err = kernel_bind(sock, (struct sockaddr *) &ip_addr,

					  sizeof(ip_addr));

			if (err < 0)

				goto out;



			ip_addr.l2tp_family = AF_INET;

			ip_addr.l2tp_addr = cfg->peer_ip;

			ip_addr.l2tp_conn_id = peer_tunnel_id;

		err = kernel_connect(sock, (struct sockaddr *) &ip_addr, sizeof(ip_addr), 0);

			err = kernel_connect(sock, (struct sockaddr *) &ip_addr,

					     sizeof(ip_addr), 0);

			if (err < 0)

				goto out;



		}

		break;



	default:

CRA Git | Maintained and supported by SUSTech CRA and CCSE