Re: IPv6 Support in Owl

On Thu, 10 Dec 2009 17:37:03 -0000, <[email protected]> wrote:

> On 10-Dec-2009 15:13:45 -0000, Simon Baker wrote:
>
>  > Since I've upgraded one of my machines (running IPv6 natively)
>  > I've hit a strange issue, whereby I can no long ping6 or
>  > tracepath6 to hosts:
>  > 	tachikoma!simonb:/usr/src/kernel$ ping6 hobo.kaizo.org
>  > 	can't receive hop limit: Protocol not available
>  > Similar errors occur when trying to run tracepath6 as well:
>  > 	tachikoma!simonb:/usr/src/kernel$ tracepath6 hobo.kaizo.org
>  > 	IPV6_HOPLIMIT: Protocol not available
>
> gremlin@owl-test:~ > zcat /proc/config.gz | grep IPV6
> # CONFIG_IPV6 is not set

Hiya,

I already have IPv6 in my kernel, indeed it's actually all working fine ;  
I can create and accept IPv6 connections with no problems.

traceroute6 for example actually works fine:

traceroute to k.kaizo.org (2001:470:103:68::2), 30 hops max, 40 byte  
packets
  1  section9.kaizo.org (2001:470:944b:abcd::225) 0.298 ms  0.117 ms  0.119  
ms
  2  spbkaizo-1.tunnel.tserv5.lon1.ipv6.he.net (2001:470:1f08:514::1)  
17.652 ms  21.689 ms  20.913 ms
  3  gige-g4-6.core1.lon1.he.net (2001:470:0:67::1) 22.327 ms  21.376 ms   
28.828 ms
  4  10gigabitethernet2-3.core1.nyc4.he.net (2001:470:0:3e::1) 91.110 ms   
90.114 ms 2001:470:0:128::1 (2001:470:0:128::1) 86.620 ms
  5  10gigabitethernet1-2.core1.chi1.he.net (2001:470:0:4e::1) 136.391 ms   
135.493 ms  134.498 ms
  6  2001:470:1:35::2 (2001:470:1:35::2) 111.786 ms  110.791 ms  114.876 ms
  7  k.kaizo.org (2001:470:103:68::2) 113.879 ms  112.886 ms  111.908 ms

It's simply ping6 and tracepath6 that are broken.

The attached iputils.spec and diff fix this issue.

Regards,

Simon.

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diff -uNr iputils.orig/ping6.c iputils/ping6.c
--- iputils.orig/ping6.c	2002-09-20 16:08:11 +0100
+++ iputils/ping6.c	2009-12-10 18:12:49 +0000
@@ -483,7 +483,7 @@
 
 	if (1) {
 		int on = 1;
-		if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_HOPLIMIT,
+		if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_2292HOPLIMIT,
 			       &on, sizeof(on)) == -1) {
 			perror ("can't receive hop limit");
 			exit(2);
@@ -701,7 +701,7 @@
 
 	for (c = CMSG_FIRSTHDR(msg); c; c = CMSG_NXTHDR(msg, c)) {
 		if (c->cmsg_level != SOL_IPV6 ||
-		    c->cmsg_type != IPV6_HOPLIMIT)
+		    c->cmsg_type != IPV6_2292HOPLIMIT)
 			continue;
 		if (c->cmsg_len < CMSG_LEN(sizeof(int)))
 			continue;
diff -uNr iputils.orig/tracepath6.c iputils/tracepath6.c
--- iputils.orig/tracepath6.c	2001-09-02 03:03:46 +0100
+++ iputils/tracepath6.c	2009-12-10 18:08:44 +0000
@@ -111,7 +111,7 @@
 		if (cmsg->cmsg_level == SOL_IPV6) {
 			if (cmsg->cmsg_type == IPV6_RECVERR) {
 				e = (struct sock_extended_err *)CMSG_DATA(cmsg);
-			} else if (cmsg->cmsg_type == IPV6_HOPLIMIT) {
+			} else if (cmsg->cmsg_type == IPV6_2292HOPLIMIT) {
 				rethops = *(int*)CMSG_DATA(cmsg);
 			}
 		} else if (cmsg->cmsg_level == SOL_IP) {