srtp: Allow zero as tag value for a sRTP Crypto Suite.

ASTERISK-25490 #close Change-Id: I1c5fc0942c33c96d62b24203aad0f1e1a1a0131f
8 years ago · ef19db9261
parent 95c66234ba
commit ef19db9261
1 changed files with 2 additions and 2 deletions
--- a/main/sdp_srtp.c
+++ b/main/sdp_srtp.c
@ -238,8 +238,8 @@ int ast_sdp_crypto_process(struct ast_rtp_instance *rtp, struct ast_sdp_srtp *sr
 		return -1;
 	}

-	/* RFC4568 9.1 - tag is 1-9 digits, greater than zero */
-	if (sscanf(tag, "%30d", &crypto->tag) != 1 || crypto->tag <= 0 || crypto->tag > 999999999) {
+	/* RFC4568 9.1 - tag is 1-9 digits */
+	if (sscanf(tag, "%30d", &crypto->tag) != 1 || crypto->tag < 0 || crypto->tag > 999999999) {
 		ast_log(LOG_WARNING, "Unacceptable a=crypto tag: %s\n", tag);
 		return -1;
 	}