[PATCH] 2.4.18 IPV6_ADDRFORM

[Steve G]

The attached patch is created against 2.4.18 (but
2.4.19 seems very close). It adds support for
IPV6_ADDRFORM getsockopt. I sent a patch earlier
deleting IPV6_ADDRFORM from 2.5, but since 2.4 has
IPV6_ADDRFORM defined (and its shipped), it should be
supported rather than deleted.

Cheers,
Steve Grubb

-------

diff -ur linux-2.4.18/net/ipv6/ipv6_sockglue.c
linux-2.4.18a/net/ipv6/ipv6_sockglue.c
--- linux-2.4.18/net/ipv6/ipv6_sockglue.c	Thu Sep 20
17:12:56 2001
+++ linux-2.4.18a/net/ipv6/ipv6_sockglue.c	Thu Oct  3
09:23:55 2002
@@ -412,6 +412,16 @@
 	if (get_user(len, optlen))
 		return -EFAULT;
 	switch (optname) {
+	case IPV6_ADDRFORM:
+		if (sk->protocol != IPPROTO_UDP &&
+                    sk->protocol != IPPROTO_TCP)
+			return -EINVAL;
+
+		if (sk->state != TCP_ESTABLISHED) 
+			return -ENOTCONN;
+					 
+		val = sk->family;	
+		break;
 	case IPV6_PKTOPTIONS:
 	{
 		struct msghdr msg;

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