trace: display neigh advert solicited flag

Include the solicited flag value in NDP neighbor advertisement trace
output. This flag distinguishes between advertisements sent in response
to neighbor solicitations (solicited=1) and unsolicited announcements
broadcast when an interface comes up (solicited=0).

Signed-off-by: Robin Jarry <[email protected]>

Author: rjarry

modules/infra/datapath/trace.c

@@ -266,7 +266,7 @@ int trace_icmp6_format(char *buf, size_t len, const struct icmp6 *icmp6, size_t
 		const struct icmp6_neigh_advert *na = PAYLOAD(icmp6);
 		payload_len -= sizeof(*na);
 		inet_ntop(AF_INET6, &na->target, dst, sizeof(dst));
-		SAFE_BUF(snprintf, len, "neigh advert %s is at", dst);
+		SAFE_BUF(snprintf, len, "neigh advert %s is at (solicited=%u)", dst, na->solicited);
 		opt = PAYLOAD(na);
 		break;
 	}