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authorChris Elston <celston@katalix.com>2012-04-29 23:48:52 +0200
committerDavid S. Miller <davem@davemloft.net>2012-05-01 15:30:55 +0200
commitf9bac8df908d7c0a36960265c92f3445623b19d1 (patch)
tree58bc4af4f65eed62a01027d2358b713b1a060e37 /net/l2tp/l2tp_netlink.c
parentl2tp: show IPv6 addresses in l2tp debugfs file (diff)
downloadlinux-f9bac8df908d7c0a36960265c92f3445623b19d1.tar.xz
linux-f9bac8df908d7c0a36960265c92f3445623b19d1.zip
l2tp: netlink api for l2tpv3 ipv6 unmanaged tunnels
This patch adds support for unmanaged L2TPv3 tunnels over IPv6 using the netlink API. We already support unmanaged L2TPv3 tunnels over IPv4. A patch to iproute2 to make use of this feature will be submitted separately. Signed-off-by: Chris Elston <celston@katalix.com> Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp/l2tp_netlink.c')
-rw-r--r--net/l2tp/l2tp_netlink.c48
1 files changed, 44 insertions, 4 deletions
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index 1dbb9772fc45..24edad0fd9ba 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -133,10 +133,25 @@ static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info
if (info->attrs[L2TP_ATTR_FD]) {
fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]);
} else {
- if (info->attrs[L2TP_ATTR_IP_SADDR])
- cfg.local_ip.s_addr = nla_get_be32(info->attrs[L2TP_ATTR_IP_SADDR]);
- if (info->attrs[L2TP_ATTR_IP_DADDR])
- cfg.peer_ip.s_addr = nla_get_be32(info->attrs[L2TP_ATTR_IP_DADDR]);
+#if IS_ENABLED(CONFIG_IPV6)
+ if (info->attrs[L2TP_ATTR_IP6_SADDR] &&
+ info->attrs[L2TP_ATTR_IP6_DADDR]) {
+ cfg.local_ip6 = nla_data(
+ info->attrs[L2TP_ATTR_IP6_SADDR]);
+ cfg.peer_ip6 = nla_data(
+ info->attrs[L2TP_ATTR_IP6_DADDR]);
+ } else
+#endif
+ if (info->attrs[L2TP_ATTR_IP_SADDR] &&
+ info->attrs[L2TP_ATTR_IP_DADDR]) {
+ cfg.local_ip.s_addr = nla_get_be32(
+ info->attrs[L2TP_ATTR_IP_SADDR]);
+ cfg.peer_ip.s_addr = nla_get_be32(
+ info->attrs[L2TP_ATTR_IP_DADDR]);
+ } else {
+ ret = -EINVAL;
+ goto out;
+ }
if (info->attrs[L2TP_ATTR_UDP_SPORT])
cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]);
if (info->attrs[L2TP_ATTR_UDP_DPORT])
@@ -225,6 +240,9 @@ static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
struct nlattr *nest;
struct sock *sk = NULL;
struct inet_sock *inet;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct ipv6_pinfo *np = NULL;
+#endif
struct l2tp_stats stats;
unsigned int start;
@@ -273,6 +291,11 @@ static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
if (!sk)
goto out;
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6)
+ np = inet6_sk(sk);
+#endif
+
inet = inet_sk(sk);
switch (tunnel->encap) {
@@ -284,6 +307,15 @@ static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
goto nla_put_failure;
/* NOBREAK */
case L2TP_ENCAPTYPE_IP:
+#if IS_ENABLED(CONFIG_IPV6)
+ if (np) {
+ if (nla_put(skb, L2TP_ATTR_IP6_SADDR, sizeof(np->saddr),
+ &np->saddr) ||
+ nla_put(skb, L2TP_ATTR_IP6_DADDR, sizeof(np->daddr),
+ &np->daddr))
+ goto nla_put_failure;
+ } else
+#endif
if (nla_put_be32(skb, L2TP_ATTR_IP_SADDR, inet->inet_saddr) ||
nla_put_be32(skb, L2TP_ATTR_IP_DADDR, inet->inet_daddr))
goto nla_put_failure;
@@ -752,6 +784,14 @@ static struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = {
[L2TP_ATTR_MTU] = { .type = NLA_U16, },
[L2TP_ATTR_MRU] = { .type = NLA_U16, },
[L2TP_ATTR_STATS] = { .type = NLA_NESTED, },
+ [L2TP_ATTR_IP6_SADDR] = {
+ .type = NLA_BINARY,
+ .len = sizeof(struct in6_addr),
+ },
+ [L2TP_ATTR_IP6_DADDR] = {
+ .type = NLA_BINARY,
+ .len = sizeof(struct in6_addr),
+ },
[L2TP_ATTR_IFNAME] = {
.type = NLA_NUL_STRING,
.len = IFNAMSIZ - 1,