check CSeq method matches that of the reqeust line

baresip · Aug 21, 2021 · ae1a19a · ae1a19a
1 parent 98b122c
commit ae1a19a
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/sip/transp.c b/src/sip/transp.c
@@ -337,6 +337,12 @@ static void sip_recv(struct sip *sip, const struct sip_msg *msg,
 		}
 	}
 
+	/* check consistency between CSeq method and that of request line */
+	if (msg->req && pl_casecmp(&(msg->cseq.met), &(msg->met))){
+		(void)sip_reply(sip, msg, 400, "Bad Request");
+		return;
+	}
+
 	while (le) {
 		struct sip_lsnr *lsnr = le->data;