MT#63317 fix AEAD encryption with header extension

Change-Id: I75ddb3f4b711b31f21a240b04ac680a31894fa16

kernel-module/extmap_filter.inc.c

@@ -241,6 +241,7 @@ static void apply_extmap_filter(struct sk_buff *skb, struct rtpengine_output *o,
 		else
 			add_extmap_hdr_short(skb, o, rtp);
 	}
+	rtp->header_len = rtp->payload - (unsigned char *) rtp->rtp_header;
 }
 
 

t/kernel-extmap-filter.c

@@ -35,6 +35,7 @@ struct rtp_exthdr {
 
 struct rtp_parsed {
 	struct rtp_header *rtp_header;
+	size_t header_len;
 	unsigned char *payload;
 	size_t payload_len;
 	struct rtp_exthdr *ext_hdr;