50 lines
2.0 KiB
C
50 lines
2.0 KiB
C
/* Simple TRAU frame reflector to route voice calls */
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/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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/* The "TRAU mux map" defines which particular 16kbit sub-slot (in which E1
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* timeslot on which E1 interface) should be directly muxed to which other
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* sub-slot. Entries in the mux map are always bi-directional.
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*
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* The idea of all this is to directly switch voice channels in the BSC
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* from one phone to another. We do this right now since we don't support
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* any external interface for voice channels, and in the future as an
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* optimization to routing them externally.
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*/
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/* map a TRAU mux map entry */
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int trau_mux_map(const struct gsm_e1_subslot *src,
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const struct gsm_e1_subslot *dst);
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int trau_mux_map_lchan(const struct gsm_lchan *src,
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const struct gsm_lchan *dst);
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/* unmap a TRAU mux map entry */
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int trau_mux_unmap(const struct gsm_e1_subslot *ss, u_int32_t callref);
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/* we get called by subchan_demux */
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int trau_mux_input(struct gsm_e1_subslot *src_e1_ss,
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const u_int8_t *trau_bits, int num_bits);
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/* add a trau receiver */
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int trau_recv_lchan(struct gsm_lchan *lchan, u_int32_t callref);
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/* send trau from application */
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int trau_send_lchan(struct gsm_lchan *lchan, struct decoded_trau_frame *tf);
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