[PATCH iproute2 3/6] ip neigh: Add support for keyword

[David Ahern <dsa@cumulusnetworks.com>]

Add vrf keyword to 'ip neigh' commands. Allows listing neighbor
entries for all links associated with a given VRF.
  $ ip neigh show vrf NAME

versus current syntax:
  $ ip neigh show master DEV

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
---
 ip/ipneigh.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/ip/ipneigh.c b/ip/ipneigh.c
index 4ddb747e2086..3e444712645f 100644
--- a/ip/ipneigh.c
+++ b/ip/ipneigh.c
@@ -48,7 +48,8 @@ static void usage(void)
 {
 	fprintf(stderr, "Usage: ip neigh { add | del | change | replace }\n"
 			"                { ADDR [ lladdr LLADDR ] [ nud STATE ] | proxy ADDR } [ dev DEV ]\n");
-	fprintf(stderr, "       ip neigh { show | flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n\n");
+	fprintf(stderr, "       ip neigh { show | flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
+	fprintf(stderr, "                                 [ vrf NAME ]\n\n");
 	fprintf(stderr, "STATE := { permanent | noarp | stale | reachable | none |\n"
 			"           incomplete | delay | probe | failed }\n");
 	exit(-1);
@@ -385,6 +386,17 @@ static int do_show_or_flush(int argc, char **argv, int flush)
 				invarg("Device does not exist\n", *argv);
 			addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
 			filter.master = ifindex;
+		} else if (strcmp(*argv, "vrf") == 0) {
+			int ifindex;
+
+			NEXT_ARG();
+			ifindex = ll_name_to_index(*argv);
+			if (!ifindex)
+				invarg("Not a valid VRF name\n", *argv);
+			if (!name_is_vrf(*argv))
+				invarg("Not a valid VRF name\n", *argv);
+			addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
+			filter.master = ifindex;
 		} else if (strcmp(*argv, "unused") == 0) {
 			filter.unused_only = 1;
 		} else if (strcmp(*argv, "nud") == 0) {
-- 
2.1.4