Log error condition if a new or changed Router Advertisment to avoid

spamming the log.

diff --git a/ipv6nd.c b/ipv6nd.c
index f6769da88dc7118fb3a24cfb8e482378f4702ad5..e0e45ae4d1332f06c2b665627827af7b2d3813c9 100644 (file)
--- a/ipv6nd.c
+++ b/ipv6nd.c
@@ -822,27 +822,28 @@ ipv6nd_handlera(struct ipv6_ctx *ctx, struct interface *ifp,
                case ND_OPT_PREFIX_INFORMATION:
                        pi = (struct nd_opt_prefix_info *)(void *)ndo;
                        if (pi->nd_opt_pi_len != 4) {
-                               syslog(LOG_ERR,
+                               syslog(new_data ? LOG_ERR : LOG_DEBUG,
                                    "%s: invalid option len for prefix",
                                    ifp->name);
                                continue;
                        }
                        if (pi->nd_opt_pi_prefix_len > 128) {
-                               syslog(LOG_ERR, "%s: invalid prefix len",
+                               syslog(new_data ? LOG_ERR : LOG_DEBUG,
+                                   "%s: invalid prefix len",
                                    ifp->name);
                                continue;
                        }
                        if (IN6_IS_ADDR_MULTICAST(&pi->nd_opt_pi_prefix) ||
                            IN6_IS_ADDR_LINKLOCAL(&pi->nd_opt_pi_prefix))
                        {
-                               syslog(LOG_ERR,
+                               syslog(new_data ? LOG_ERR : LOG_DEBUG,
                                    "%s: invalid prefix in RA", ifp->name);
                                continue;
                        }
                        if (ntohl(pi->nd_opt_pi_preferred_time) >
                            ntohl(pi->nd_opt_pi_valid_time))
                        {
-                               syslog(LOG_ERR,
+                               syslog(new_data ? LOG_ERR : LOG_DEBUG,
                                    "%s: pltime > vltime", ifp->name);
                                continue;
                        }
@@ -977,7 +978,8 @@ ipv6nd_handlera(struct ipv6_ctx *ctx, struct interface *ifp,
                        n = (dnssl->nd_opt_dnssl_len - 1) * 8;
                        r = decode_rfc3397(NULL, 0, op, n);
                        if (r < 1) {
-                               syslog(LOG_ERR, "%s: invalid DNSSL option",
+                               syslog(new_data ? LOG_ERR : LOG_DEBUG,
+                                   "%s: invalid DNSSL option",
                                    ifp->name);
                                continue;
                        } else {