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ss: print value of IPV6_V6ONLY socket option if set

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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>
This commit is contained in:
Phil Sutter 2015-06-24 13:07:20 +02:00 committed by Stephen Hemminger
parent 528c2551cd
commit f32dc7467f
1 changed files with 5 additions and 0 deletions
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5
misc/ss.c
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@ -2045,6 +2045,11 @@ 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]);