add simplistic IuUP FSM and strip/add IuUP headers
This should really be using the FSM in libosmocore/laforge/iu_up: take the best
of both sides and integate in the libosmocore FSM implementation, then use it
here.
- in libosmocore, the FSM definition is nicer.
- here, we have correct header checksums.
Introduce using msgb to receive, pass and send RTP packets.
Add/strip IuUP from RTP data (for which msgb is particularly useful).
The payload type on an IuUP conn is maintained as negotiated in the IuUP
Initialization. For the pure RTP side, an SDP "AMR" ptmap attribute is looked
up, so that payload type numbers are translated between IuUP <-> RTP.
Change-Id: Ibc70e0aa00476926dd1f4ea8139c34f31f9cdfa3
diff --git a/include/osmocom/mgcp/mgcp_endp.h b/include/osmocom/mgcp/mgcp_endp.h
index 75f093d..9c0dc8c 100644
--- a/include/osmocom/mgcp/mgcp_endp.h
+++ b/include/osmocom/mgcp/mgcp_endp.h
@@ -23,15 +23,27 @@
#pragma once
+#include <osmocom/core/msgb.h>
+
struct sockaddr_in;
struct mgcp_conn;
+struct mgcp_conn_rtp;
struct mgcp_endpoint;
-/* Callback type for RTP dispatcher functions
- (e.g mgcp_dispatch_rtp_bridge_cb, see below) */
-typedef int (*mgcp_dispatch_rtp_cb) (int proto, struct sockaddr_in *addr,
- char *buf, unsigned int buf_size,
- struct mgcp_conn *conn);
+struct osmo_rtp_msg_ctx {
+ int proto;
+ struct mgcp_conn_rtp *conn_src;
+ struct sockaddr_in *from_addr;
+};
+
+#define OSMO_RTP_MSG_CTX(MSGB) (*(struct osmo_rtp_msg_ctx**)&((MSGB)->dst))
+
+#define LOG_ENDP(endp, level, fmt, args...) \
+ LOGP(DRTP, level, "%x@ " fmt, ENDPOINT_NUMBER(endp), ## args)
+
+/* Callback type for RTP dispatcher functions (e.g mgcp_dispatch_rtp_bridge_cb, see below).
+ * The OSMO_RTP_MSG_CTX() should be set appropriately on the msg. */
+typedef int (*mgcp_dispatch_rtp_cb) (struct msgb *msg);
/* Callback type for endpoint specific cleanup actions. This function
* is automatically executed when a connection is freed (see mgcp_conn_free()