[sr-dev] git:5.2:eed2a7f8: core: fix an error in check_via_address, reported from Mojtaba, mespio at gmail dot com

[Henning Westerholt]

Module: kamailio
Branch: 5.2
Commit: eed2a7f86129950e5f20a4b4010a7e67ea04eac5
URL: https://github.com/kamailio/kamailio/commit/eed2a7f86129950e5f20a4b4010a7e67ea04eac5

Author: Henning Westerholt <hw at kamailio.org>
Committer: Henning Westerholt <hw at kamailio.org>
Date: 2018-12-30T18:41:44+01:00

core: fix an error in check_via_address, reported from 	Mojtaba, mespio at gmail dot com

- fix an error in check_via_address, reported from  Mojtaba, mespio at gmail dot com
- use the same logic for IPv4 string comparison as for IPv6
- the old comparison could return true for e.g. via="192.168.1.1", src="192.1.1.100"
- the new logic is also faster for the trivial case with different string length

(cherry picked from commit 98ee014a88ca951d82a0389f0be119078ba525f7)

---

Modified: src/core/msg_translator.c

---

Diff:  https://github.com/kamailio/kamailio/commit/eed2a7f86129950e5f20a4b4010a7e67ea04eac5.diff
Patch: https://github.com/kamailio/kamailio/commit/eed2a7f86129950e5f20a4b4010a7e67ea04eac5.patch

---

diff --git a/src/core/msg_translator.c b/src/core/msg_translator.c
index 08e518a9d8..038b02f461 100644
--- a/src/core/msg_translator.c
+++ b/src/core/msg_translator.c
@@ -179,7 +179,7 @@ static int check_via_address(struct ip_addr* ip, str *name,
 				LM_CRIT("invalid Via host name\n");
 				return -1;
 			}
-			if (strncmp(name->s, s, name->len)==0)
+			if (len==name->len&&(strncmp(name->s, s, name->len)==0))
 				return 0;
 		}
 	}else{