From 14809558dba9fe8c9ff2943fbea8cb05f6a1bfbf Mon Sep 17 00:00:00 2001

From: Phil Sutter <phil@nwl.cc>

Date: Wed, 24 Jun 2015 13:07:20 +0200

Subject: [PATCH 2/2] ss: print value of IPV6_V6ONLY socket option if set

If available and set, print 'v6only:1' for AF_INET6 sockets upon request

of extended information. For IPv6 sockets bound to in6addr_any, this is

the only way to determine if they will also accept IPv4 requests or not.

Signed-off-by: Phil Sutter <phil@nwl.cc>

---

 misc/ss.c | 5 +++++

 1 file changed, 5 insertions(+)

diff --git a/misc/ss.c b/misc/ss.c

index 954a30b..ec08e03 100644

--- a/misc/ss.c

+++ b/misc/ss.c

@@ -2026,6 +2026,11 @@ static int inet_show_sock(struct nlmsghdr *nlh, struct filter *f, int protocol)

 	if (show_details) {

 		sock_details_print(&s);

+		if (s.local.family == AF_INET6 && tb[INET_DIAG_SKV6ONLY]) {

+			unsigned char v6only;

+			v6only = *(__u8 *)RTA_DATA(tb[INET_DIAG_SKV6ONLY]);

+			printf(" v6only:%u", v6only);

+		}

 		if (tb[INET_DIAG_SHUTDOWN]) {

 			unsigned char mask;

 			mask = *(__u8 *)RTA_DATA(tb[INET_DIAG_SHUTDOWN]);

-- 

1.8.3.1