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Diffstat (limited to 'include/openbsc/trau_mux.h')
-rw-r--r-- | include/openbsc/trau_mux.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/include/openbsc/trau_mux.h b/include/openbsc/trau_mux.h new file mode 100644 index 000000000..dcf33ee8f --- /dev/null +++ b/include/openbsc/trau_mux.h @@ -0,0 +1,48 @@ +/* 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 Affero General Public License as published by + * the Free Software Foundation; either version 3 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +/* 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, u_int32_t callref); + +/* 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); + +/* add a trau receiver */ +int trau_recv_lchan(struct gsm_lchan *lchan, u_int32_t callref); + +/* send trau from application */ +int trau_send_frame(struct gsm_lchan *lchan, struct gsm_data_frame *frame); |