cellular-infrastructure
/
osmo-msc
mirror of https://gerrit.osmocom.org/osmo-msc
9
0
Fork 0
Code Issues Releases Wiki Activity

mgcp: hack to keep IuUP working 

Since change If9a81d057f73150e483286472e73c45e7a453a6d removes the
RTP loopback at the beginning. This also means that the Hack we
do to run the IuUP negotiation via looping back the first few
RTP packets will not work anymore. However, we should keep that
hack as long as we do not have IuUP support in the MGW.

- Start RTP connection in loopback mode for IuUP

Change-Id: I4c7d90de4dc87e8baf7cf4a0c69d0e9e8c92e27b
This commit is contained in:
Philipp Maier 2018-05-29 12:02:38 +02:00
parent 65d8d0d9b5
commit 5046db98b1
1 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
src/libmsc/msc_mgcp.c
View File

@ -278,10 +278,22 @@ static void fsm_crcx_ran_cb(struct osmo_fsm_inst *fi, uint32_t event, void *data
struct msgb *msg;
int rc;
#ifdef BUILD_IU
struct gsm_trans *trans;
struct gsm_subscriber_connection *conn;
#endif
OSMO_ASSERT(mgcp_ctx);
mgcp = mgcp_ctx->mgcp;
OSMO_ASSERT(mgcp);
#ifdef BUILD_IU
trans = mgcp_ctx->trans;
OSMO_ASSERT(trans);
conn = trans->conn;
OSMO_ASSERT(conn);
#endif
/* NOTE: In case of error, we will not be able to perform any DLCX
* operation because until this point we do not have requested any
* endpoint yet. */
@ -302,6 +314,14 @@ static void fsm_crcx_ran_cb(struct osmo_fsm_inst *fi, uint32_t event, void *data
return;
}
/* HACK: We put the connection in loopback mode at the beginnig to
* trick the NodeB into doing the IuUP negotiation with itsself.
* this is a hack we need because osmo-mgw does not support IuUP yet */
#ifdef BUILD_IU
if (conn->via_ran == RAN_UTRAN_IU)
mgcp_msg.conn_mode = MGCP_CONN_LOOPBACK;
#endif
msg = mgcp_msg_gen(mgcp, &mgcp_msg);
OSMO_ASSERT(msg);
@ -377,10 +397,22 @@ static void fsm_crcx_cn_cb(struct osmo_fsm_inst *fi, uint32_t event, void *data)
struct msgb *msg;
int rc;
#ifdef BUILD_IU
struct gsm_trans *trans;
struct gsm_subscriber_connection *conn;
#endif
OSMO_ASSERT(mgcp_ctx);
mgcp = mgcp_ctx->mgcp;
OSMO_ASSERT(mgcp);
#ifdef BUILD_IU
trans = mgcp_ctx->trans;
OSMO_ASSERT(trans);
conn = trans->conn;
OSMO_ASSERT(conn);
#endif
switch (event) {
case EV_CRCX_RAN_RESP:
break;
@ -405,6 +437,14 @@ static void fsm_crcx_cn_cb(struct osmo_fsm_inst *fi, uint32_t event, void *data)
return;
}
/* HACK: We put the connection in loopback mode at the beginnig to
* trick the NodeB into doing the IuUP negotiation with itsself.
* this is a hack we need because osmo-mgw does not support IuUP yet */
#ifdef BUILD_IU
if (conn->via_ran == RAN_UTRAN_IU)
mgcp_msg.conn_mode = MGCP_CONN_LOOPBACK;
#endif
msg = mgcp_msg_gen(mgcp, &mgcp_msg);
OSMO_ASSERT(msg);