[sr-dev] git:5.5:01ab21c4: core: parse session sendrecv_mode in sdp

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 5.5
Commit: 01ab21c4ba28259be72fd704afd389132260e258
URL: https://github.com/kamailio/kamailio/commit/01ab21c4ba28259be72fd704afd389132260e258

Author: Luis Azedo <luis.azedo at factorlusitano.com>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2021-08-19T21:32:55+02:00

core: parse session sendrecv_mode in sdp

- some user agents send a=sendonly as session attribute which apply to all media streams

(cherry picked from commit 8da4477fd6d9590b9946071b9ac2a778b1d55d01)

---

Modified: src/core/parser/sdp/sdp.c
Modified: src/core/parser/sdp/sdp.h

---

Diff:  https://github.com/kamailio/kamailio/commit/01ab21c4ba28259be72fd704afd389132260e258.diff
Patch: https://github.com/kamailio/kamailio/commit/01ab21c4ba28259be72fd704afd389132260e258.patch

---

diff --git a/src/core/parser/sdp/sdp.c b/src/core/parser/sdp/sdp.c
index d5e4f0695b..14779e4d12 100644
--- a/src/core/parser/sdp/sdp.c
+++ b/src/core/parser/sdp/sdp.c
@@ -453,6 +453,18 @@ static int parse_sdp_session(str *sdp_body, int session_num, str *cnt_disp, sdp_
 		extract_bwidth(&tmpstr1, &session->bw_type, &session->bw_width);
 	}
 
+	/* Find sendrecv_mode between session begin and first media.
+	 * parse session attributes to check is_on_hold for a= for all medias. */
+	a1p = find_first_sdp_line(o1p, m1p, 'a', NULL);
+	while (a1p) {
+		tmpstr1.s = a1p;
+		tmpstr1.len = m1p - a1p;
+		if (extract_sendrecv_mode(&tmpstr1, &session->sendrecv_mode, &session->is_on_hold) == 0) {
+			break;
+		}
+		a1p = find_next_sdp_line(a1p, m1p, 'a', NULL);
+	}
+
 	/* Have session. Iterate media descriptions in session */
 	m2p = m1p;
 	stream_num = 0;
diff --git a/src/core/parser/sdp/sdp.h b/src/core/parser/sdp/sdp.h
index 84ebcfc8a2..d8c1b15b66 100644
--- a/src/core/parser/sdp/sdp.h
+++ b/src/core/parser/sdp/sdp.h
@@ -111,6 +111,8 @@ typedef struct sdp_session_cell {
 				AS - application specific */
 	str bw_width;     /**< The <bandwidth> is interpreted as kilobits per second by default */
 	int streams_num;  /**< number of streams inside a session */
+	str sendrecv_mode;
+	int is_on_hold; /**< flag indicating if this session is on hold */
 	struct sdp_stream_cell*  streams;
 } sdp_session_cell_t;