[sr-dev] git:4.4:e20b38e0: core: safety check for retrying dns cache find

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 4.4
Commit: e20b38e0084c1f89c43a921a8a2affbea060aaa5
URL: https://github.com/kamailio/kamailio/commit/e20b38e0084c1f89c43a921a8a2affbea060aaa5

Author: Daniel-Constantin Mierla <miconda at gmail.com>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2017-03-28T13:35:11+02:00

core: safety check for retrying dns cache find

(cherry picked from commit 9a56b88c1438e2d4f0c5b57c71bbe4e904b1a8e4)
(cherry picked from commit 3883a3174707bbaa3ce836faca035bae9c90c456)

---

Modified: dns_cache.c

---

Diff:  https://github.com/kamailio/kamailio/commit/e20b38e0084c1f89c43a921a8a2affbea060aaa5.diff
Patch: https://github.com/kamailio/kamailio/commit/e20b38e0084c1f89c43a921a8a2affbea060aaa5.patch

---

diff --git a/dns_cache.c b/dns_cache.c
index 4273d2f..39bed3d 100644
--- a/dns_cache.c
+++ b/dns_cache.c
@@ -597,8 +597,10 @@ inline static struct dns_hash_entry* _dns_hash_find(str* name, int type,
 			cname_chain++;
 			cname.s=((struct cname_rdata*)e->rr_lst->rdata)->name;
 			cname.len= ((struct cname_rdata*)e->rr_lst->rdata)->name_len;
-			name=&cname;
-			goto again;
+			if(cname.s!=NULL && cname.len>0) {
+				name=&cname;
+				goto again;
+			}
 		}
 	}
 	return ret;