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