From: Marek Vavruša <marek.vavrusa@nic.cz>
Date: Wed, 3 Jun 2015 00:39:13 +0000 (+0200)
Subject: lib/resolve: impose limits on NS election iterations
X-Git-Tag: v1.0.0-beta1~124^2~15
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2ce9f414fea103c2305bb39b806f323d4312caa8;p=thirdparty%2Fknot-resolver.git

lib/resolve: impose limits on NS election iterations
---

diff --git a/lib/resolve.c b/lib/resolve.c
index cd9d72d6b..3810a9d9f 100644
--- a/lib/resolve.c
+++ b/lib/resolve.c
@@ -381,6 +381,7 @@ int kr_resolve_produce(struct kr_request *request, struct sockaddr **dst, int *t
 {
 	struct kr_rplan *rplan = &request->rplan;
 	struct kr_query *qry = kr_rplan_current(rplan);
+	unsigned ns_election_iter = 0;
 	
 	/* No query left for resolution */
 	if (kr_rplan_empty(rplan)) {
@@ -429,6 +430,7 @@ int kr_resolve_produce(struct kr_request *request, struct sockaddr **dst, int *t
 
 ns_election:
 	/* Elect best nameserver candidate */
+	assert(++ns_election_iter < KR_ITER_LIMIT);
 	kr_nsrep_elect(&qry->ns, &qry->zone_cut.nsset, request->ctx->nsrep);
 	if (qry->ns.score > KR_NS_MAX_SCORE) {
 		DEBUG_MSG("=> no valid NS left\n");