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l2tp: let iproute2 create L2TPv3 IP tunnels using IPv6

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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: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
James Chapman 2012-04-29 21:48:55 +00:00 committed by David S. Miller
parent a32e0eec70
commit 5dac94e109
1 changed files with 50 additions and 22 deletions
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72
net/l2tp/l2tp_core.c
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@ -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;
@ -1437,32 +1438,59 @@ 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;
goto out;
}
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);
if (err < 0)
goto out;
{
err = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_L2TP,
sockp);
if (err < 0)
goto out;
sock = *sockp;
sock = *sockp;
memset(&ip_addr, 0, sizeof(ip_addr));
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));
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);
if (err < 0)
goto out;
memset(&ip_addr, 0, sizeof(ip_addr));
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));
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);
if (err < 0)
goto out;
}
break;
default: