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2017-03-16bridge calls via mgcpgwNeels Hofmeyr1-0/+1
Change-Id: Ie259e30bc532fe9817c96562022ac33443d5747a
2017-03-16IuCS: cosmetic prep for msc_call_assignment()Neels Hofmeyr1-0/+1
Rename gsm48_cc_tx_call_proc() to gsm48_cc_tx_call_proc_and_assign() to mark the place where the A-interface will send a BSSAP Assignment Request / where the IuCS-interface will send a RAB Assignment Request. Add function msc_call_assignment() to decide between A-iface and IuCS assignment, to be implemented in subsequent commit. Change-Id: I0695e233d57d13658793b0e63bb7c3ff224909a0
2017-03-16IuCS: send RANAP CommonIDNeels Hofmeyr1-0/+2
Add libiu function to send a CommonID message down a UE connection, iu_tx_common_id(); add also a corresponding stub to libiudummy for linking with tests. Add libmsc function msc_tx_common_id() to call the above. Add this mostly to clearly indicate in msc_ifaces.h that libmsc is calling out of the MSC; also to do conn->via_iface checking. Call msc_tx_common_id() after ciphering is established, in _gsm48_rx_mm_serv_req_sec_cb()'s GSM_SECURITY_SUCCEEDED case. Change-Id: I576ddd5bbabfc989149debd2f8a9743db6d26043
2017-03-16libmsc: duplicate gsm0808 / gsm48 functions (towards BSC)Neels Hofmeyr1-0/+8
In osmo-nitb, libmsc would directly call the functions on the BSC level, not always via the bsc_api. When separating libmsc from libbsc, some functions are missing from the linkage. Hence duplicate these functions to libmsc, add an msc_ prefix for clarity, also add a _tx to gsm0808_cipher_mode(): * add msc_gsm0808_tx_cipher_mode() (dummy/stub) * add msc_gsm48_tx_mm_serv_ack() * add msc_gsm48_tx_mm_serv_rej() Call these from libmsc instead of * gsm0808_cipher_mode() * gsm48_tx_mm_serv_ack() * gsm48_tx_mm_serv_rej() Also add a comment relatd to msc_gsm0808_tx_cipher_mode() in two places. Change-Id: I5b276853d3af71f5e3f0a031fd17b4fff0580020
2017-03-16Prepare entry/exit point for MSC -> BSC and MSC -> RNC communication.Neels Hofmeyr1-0/+39
Add msc_ifaces.[hc], a_iface.c, with a general msc_tx_dtap() to redirect to different interfaces depending on the actual subscriber connection. While iu_tx() is going to be functional fairly soon, the a_tx() is going to be just a dummy for some time (see comment). Add Iu specific fields in gsm_subscriber_connection: the UE connection pointer and an indicator for the Integrity Protection status on Iu (to be fully implemented in later commits). Add lac member to gsm_subscriber_connection, to allow decoupling from bts->location_area_code. The conn->lac will actually be set in iu.c in an upcoming commit ("add iucs.[hc]"). Change-Id: Idf8020a30562426e8f939706bf5c2188d5a09798