fix a kernel bug where IPv6 packets are received on IPv4 sockets, this fixes dual stack software like OLSRd when running on Kernel 2.4 Signed-off-by: Alina Friedrichsen <x-alina@gmx.net>

SVN-Revision: 21461
2010-05-15 22:36:56 +00:00 · 2010-05-15 22:36:56 +00:00 · f155da0922
commit f155da0922
parent 52f1e9e50f
1 changed files with 18 additions and 0 deletions
--- a/target/linux/brcm-2.4/patches/200-fix_ipv6_receiving_with_ipv4_socket.patch
+++ b/target/linux/brcm-2.4/patches/200-fix_ipv6_receiving_with_ipv4_socket.patch
@ -0,0 +1,18 @@
+--- a/net/ipv4/udp.c	2009-12-26 00:06:59.000000000 +0100
+++ b/net/ipv4/udp.c	2009-12-27 00:27:05.003012266 +0100
+@@ -711,7 +711,14 @@
+ 	skb = skb_recv_datagram(sk, flags, noblock, &err);
+ 	if (!skb)
+ 		goto out;
+-  
+
+	if (skb->nh.iph->version != 4) {
+		skb_free_datagram(sk, skb);
+		if (noblock)
+			return -EAGAIN;
+		goto try_again;
+	}
+
+   	copied = skb->len - sizeof(struct udphdr);
+ 	if (copied > len) {
+ 		copied = len;