* iproute2: add ability to filter neighbour discovery by protocol
@ 2013-08-29 19:21 Stephen Hemminger
0 siblings, 0 replies; only message in thread
From: Stephen Hemminger @ 2013-08-29 19:21 UTC (permalink / raw)
To: netdev
Useful to be able to monitor arp and IPv6 nd seperately.
Default is both.
---
ip/ipmonitor.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/ip/ipmonitor.c b/ip/ipmonitor.c
index 4895390..70f2a7a 100644
--- a/ip/ipmonitor.c
+++ b/ip/ipmonitor.c
@@ -36,7 +36,6 @@ static void usage(void)
exit(-1);
}
-
static int accept_msg(const struct sockaddr_nl *who,
struct nlmsghdr *n, void *arg)
{
@@ -88,6 +87,13 @@ static int accept_msg(const struct sockaddr_nl *who,
}
if (n->nlmsg_type == RTM_NEWNEIGH || n->nlmsg_type == RTM_DELNEIGH ||
n->nlmsg_type == RTM_GETNEIGH) {
+ if (preferred_family) {
+ struct ndmsg *r = NLMSG_DATA(n);
+
+ if (r->ndm_family != preferred_family)
+ return 0;
+ }
+
if (prefix_banner)
fprintf(fp, "[NEIGH]");
print_neigh(who, n, arg);
--
1.7.10.4
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