From ea3dc9601bda69d8d695b57c4f7a997cd7039781 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Wed, 5 Nov 2014 08:03:50 +0100 Subject: [PATCH] ip6_tunnel: Add support for wildcard tunnel endpoints. This patch adds support for tunnels with local or remote wildcard endpoints. With this we get a NBMA tunnel mode like we have it for ipv4 and sit tunnels. Signed-off-by: Steffen Klassert Signed-off-by: David S. Miller --- net/ipv6/ip6_tunnel.c | 41 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index a8f94ff9c606..4550d08f44de 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -183,6 +183,7 @@ ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_ unsigned int hash = HASH(remote, local); struct ip6_tnl *t; struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); + struct in6_addr any; for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { if (ipv6_addr_equal(local, &t->parms.laddr) && @@ -190,6 +191,22 @@ ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_ (t->dev->flags & IFF_UP)) return t; } + + memset(&any, 0, sizeof(any)); + hash = HASH(&any, local); + for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { + if (ipv6_addr_equal(local, &t->parms.laddr) && + (t->dev->flags & IFF_UP)) + return t; + } + + hash = HASH(remote, &any); + for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { + if (ipv6_addr_equal(remote, &t->parms.raddr) && + (t->dev->flags & IFF_UP)) + return t; + } + t = rcu_dereference(ip6n->tnls_wc[0]); if (t && (t->dev->flags & IFF_UP)) return t; @@ -979,7 +996,29 @@ static int ip6_tnl_xmit2(struct sk_buff *skb, u8 proto; int err = -1; - if (!fl6->flowi6_mark) + /* NBMA tunnel */ + if (ipv6_addr_any(&t->parms.raddr)) { + struct in6_addr *addr6; + struct neighbour *neigh; + int addr_type; + + if (!skb_dst(skb)) + goto tx_err_link_failure; + + neigh = dst_neigh_lookup(skb_dst(skb), + &ipv6_hdr(skb)->daddr); + if (!neigh) + goto tx_err_link_failure; + + addr6 = (struct in6_addr *)&neigh->primary_key; + addr_type = ipv6_addr_type(addr6); + + if (addr_type == IPV6_ADDR_ANY) + addr6 = &ipv6_hdr(skb)->daddr; + + memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr)); + neigh_release(neigh); + } else if (!fl6->flowi6_mark) dst = ip6_tnl_dst_check(t); if (!ip6_tnl_xmit_ctl(t, &fl6->saddr, &fl6->daddr)) -- 2.34.1