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authorTimo Teras <timo.teras@iki.fi>2007-10-23 20:31:53 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-23 21:27:53 -0700
commit6a5f44d7a048c97b8bae8ce464c97b8fad61ff99 (patch)
tree7e7a8e51c34ae5038ea5e228d4b86dce6684fb7f /net/ipv4
parent16d14ef9f29dfa9b1d99f3eff860e9f15bc99f39 (diff)
[IPV4] ip_gre: sendto/recvfrom NBMA address
When GRE tunnel is in NBMA mode, this patch allows an application to use a PF_PACKET socket to: - send a packet to specific NBMA address with sendto() - use recvfrom() to receive packet and check which NBMA address it came from This is required to implement properly NHRP over GRE tunnel. Signed-off-by: Timo Teras <timo.teras@iki.fi> Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/ip_gre.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index f151900efaf9..c5b77bbbe844 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1033,7 +1033,6 @@ static int ipgre_tunnel_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
-#ifdef CONFIG_NET_IPGRE_BROADCAST
/* Nice toy. Unfortunately, useless in real life :-)
It allows to construct virtual multiprotocol broadcast "LAN"
over the Internet, provided multicast routing is tuned.
@@ -1092,10 +1091,19 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev,
return -t->hlen;
}
+static int ipgre_header_parse(const struct sk_buff *skb, unsigned char *haddr)
+{
+ struct iphdr *iph = (struct iphdr*) skb_mac_header(skb);
+ memcpy(haddr, &iph->saddr, 4);
+ return 4;
+}
+
static const struct header_ops ipgre_header_ops = {
.create = ipgre_header,
+ .parse = ipgre_header_parse,
};
+#ifdef CONFIG_NET_IPGRE_BROADCAST
static int ipgre_open(struct net_device *dev)
{
struct ip_tunnel *t = netdev_priv(dev);
@@ -1197,6 +1205,8 @@ static int ipgre_tunnel_init(struct net_device *dev)
dev->stop = ipgre_close;
}
#endif
+ } else {
+ dev->header_ops = &ipgre_header_ops;
}
if (!tdev && tunnel->parms.link)