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-rw-r--r--main/sdp_srtp.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/main/sdp_srtp.c b/main/sdp_srtp.c
index 8c86f1407..e576258c3 100644
--- a/main/sdp_srtp.c
+++ b/main/sdp_srtp.c
@@ -16,7 +16,7 @@
* at the top of the source tree.
*/
-/*! \file ast_sdp_crypto.c
+/*! \file
*
* \brief SRTP and SDP Security descriptions
*
@@ -238,7 +238,8 @@ int ast_sdp_crypto_process(struct ast_rtp_instance *rtp, struct ast_sdp_srtp *sr
return -1;
}
- if (sscanf(tag, "%30d", &crypto->tag) != 1 || crypto->tag <= 0 || crypto->tag > 9) {
+ /* RFC4568 9.1 - tag is 1-9 digits, greater than zero */
+ 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;
}