diff options
author | Pablo Neira Ayuso <pablo@gnumonks.org> | 2011-08-17 22:44:07 +0200 |
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committer | Harald Welte <laforge@gnumonks.org> | 2011-08-19 22:38:35 +0200 |
commit | ed5cacb240b846c106f0fc6a3ab8e8721f4c70a5 (patch) | |
tree | ba6bffbf0c95ecc0c50b5335bed77f3a2b29120f /openbsc/src/libtrau/trau_frame.c | |
parent | 7abecfcfc9ef94c1367cd88ac858b79d20f75db0 (diff) |
src: port openBSC over libosmo-abisopenbsc/0.9.150.9.15
This is a big patch that ports openBSC over libosmo-abis.
Sorry, the changes that are included here are all dependent
of libosmo-abis, splitting them into smaller pieces would
leave the repository in some intermediate state, which is
not desired.
The main changes are:
- The directory libabis/ has been removed as it now lives in
libosmo-abis.
- new configuration file format for nanoBTS and HSL femto, we
need to define the virtual e1_line and attach it to the OML
link.
- all the existing BTS drivers (nanoBTS, hsl femto, Nokia site,
BS11 and rbs2000) now use the new libosmo-abis framework.
- use r232 input driver available in libosmo-abis for bs11_config.
- use ipa_msg_recv instead of old ipaccess_read_msg function.
- delete definition of gsm_e1_subslot and input_signal_data.
These structures now lives in libosmo-abis.
Most of this patch are deletions of libabis/ which has been
moved to libosmo-abis.
This patch also modifies openBSC to use all the new definitions
available in libosmocore and libosmo-abis. In order to do that,
we have replaced the following:
- DINP, DMI, DMIB and DMUX by their respective DL* correspondences.
- SS_GLOBAL by SS_L_GLOBAL
- SS_INPUT by SS_L_INPUT
- S_GLOBAL_SHUTDOWN by S_L_GLOBAL_SHUTDOWN
- SS_INPUT by SS_L_INPUT
- S_INP_* by S_L_INP_* sub-signals
- E1INP_NODE by L_E1INP_NODE vty node
This patch has been tested with:
- one nanoBTS
- the HSL femto with the examples available under libosmo-abis
- BS11 with both dahdi and misdn drivers.
Diffstat (limited to 'openbsc/src/libtrau/trau_frame.c')
-rw-r--r-- | openbsc/src/libtrau/trau_frame.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/openbsc/src/libtrau/trau_frame.c b/openbsc/src/libtrau/trau_frame.c deleted file mode 100644 index 8fbaf8606..000000000 --- a/openbsc/src/libtrau/trau_frame.c +++ /dev/null @@ -1,286 +0,0 @@ -/* TRAU frame handling according to GSM TS 08.60 */ - -/* (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/>. - * - */ - -#include <unistd.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <errno.h> - -#include <openbsc/trau_frame.h> -#include <openbsc/subchan_demux.h> -#include <openbsc/debug.h> - -static uint32_t get_bits(const uint8_t *bitbuf, int offset, int num) -{ - int i; - uint32_t ret = 0; - - for (i = offset; i < offset + num; i++) { - ret = ret << 1; - if (bitbuf[i]) - ret |= 1; - } - return ret; -} - -/* Decode according to 3.1.1 */ -static void decode_fr(struct decoded_trau_frame *fr, const uint8_t *trau_bits) -{ - int i; - int d_idx = 0; - - /* C1 .. C15 */ - memcpy(fr->c_bits+0, trau_bits+17, 15); - /* C16 .. C21 */ - memcpy(fr->c_bits+15, trau_bits+310, 6); - /* T1 .. T4 */ - memcpy(fr->t_bits+0, trau_bits+316, 4); - /* D1 .. D255 */ - for (i = 32; i < 304; i+= 16) { - memcpy(fr->d_bits + d_idx, trau_bits+i+1, 15); - d_idx += 15; - } - /* D256 .. D260 */ - memcpy(fr->d_bits + d_idx, trau_bits + 305, 5); -} - -/* Decode according to 3.1.2 */ -static void decode_amr(struct decoded_trau_frame *fr, const uint8_t *trau_bits) -{ - int i; - int d_idx = 0; - - /* C1 .. C15 */ - memcpy(fr->c_bits+0, trau_bits+17, 15); - /* C16 .. C25 */ - memcpy(fr->c_bits+15, trau_bits+33, 10); - /* T1 .. T4 */ - memcpy(fr->t_bits+0, trau_bits+316, 4); - /* D1 .. D5 */ - memcpy(fr->d_bits, trau_bits+43, 5); - /* D6 .. D245 */ - for (i = 48; i < 304; i += 16) { - memcpy(fr->d_bits + d_idx, trau_bits+i+1, 15); - d_idx += 15; - } - /* D246 .. D256 */ - memcpy(fr->d_bits + d_idx, trau_bits + 305, 11); -} - -int decode_trau_frame(struct decoded_trau_frame *fr, const uint8_t *trau_bits) -{ - uint8_t cbits5 = get_bits(trau_bits, 17, 5); - - switch (cbits5) { - case TRAU_FT_FR_UP: - case TRAU_FT_FR_DOWN: - case TRAU_FT_IDLE_UP: - case TRAU_FT_IDLE_DOWN: - case TRAU_FT_EFR: - decode_fr(fr, trau_bits); - break; - case TRAU_FT_AMR: - decode_amr(fr, trau_bits); - break; - case TRAU_FT_OM_UP: - case TRAU_FT_OM_DOWN: - case TRAU_FT_DATA_UP: - case TRAU_FT_DATA_DOWN: - case TRAU_FT_D145_SYNC: - case TRAU_FT_EDATA: - LOGP(DMUX, LOGL_NOTICE, "can't decode unimplemented TRAU " - "Frame Type 0x%02x\n", cbits5); - return -1; - break; - default: - LOGP(DMUX, LOGL_NOTICE, "can't decode unknown TRAU " - "Frame Type 0x%02x\n", cbits5); - return -1; - break; - } - - return 0; -} - -const uint8_t ft_fr_down_bits[] = { 1, 1, 1, 0, 0 }; -const uint8_t ft_idle_down_bits[] = { 0, 1, 1, 1, 0 }; - -/* modify an uplink TRAU frame so we can send it downlink */ -int trau_frame_up2down(struct decoded_trau_frame *fr) -{ - uint8_t cbits5 = get_bits(fr->c_bits, 0, 5); - - switch (cbits5) { - case TRAU_FT_FR_UP: - memcpy(fr->c_bits, ft_fr_down_bits, 5); - /* clear time alignment */ - memset(fr->c_bits+5, 0, 6); - /* FIXME: SP / BFI in case of DTx */ - /* C12 .. C21 are spare and coded as '1' */ - memset(fr->c_bits+11, 0x01, 10); - break; - case TRAU_FT_EFR: - /* clear time alignment */ - memset(fr->c_bits+5, 0, 6); - /* set UFE appropriately */ - fr->c_bits[11] = 1; /* C12 (UFE), good frame (TODO) */ - /* C13 .. C15 are spare and coded as '1' */ - memset(fr->c_bits+12, 0x01, 3); - /* SP / BFI in case of DTx */ - fr->c_bits[15] = 1; /* C16 (SP), no DTX (TODO) */ - /* C17 .. C21 are spare and coded as '1' */ - memset(fr->c_bits+16, 0x01, 5); - break; - case TRAU_FT_IDLE_UP: - memcpy(fr->c_bits, ft_idle_down_bits, 5); - /* clear time alignment */ - memset(fr->c_bits+5, 0, 6); - /* FIXME: SP / BFI in case of DTx */ - /* C12 .. C21 are spare and coded as '1' */ - memset(fr->c_bits+11, 0x01, 10); - break; - case TRAU_FT_FR_DOWN: - case TRAU_FT_IDLE_DOWN: - case TRAU_FT_OM_DOWN: - case TRAU_FT_DATA_DOWN: - /* we cannot convert a downlink to a downlink frame */ - return -EINVAL; - break; - case TRAU_FT_AMR: - case TRAU_FT_OM_UP: - case TRAU_FT_DATA_UP: - case TRAU_FT_D145_SYNC: - case TRAU_FT_EDATA: - LOGP(DMUX, LOGL_NOTICE, "unimplemented TRAU Frame Type " - "0x%02x\n", cbits5); - return -1; - break; - default: - LOGP(DMUX, LOGL_NOTICE, "unknown TRAU Frame Type " - "0x%02x\n", cbits5); - return -1; - break; - } - - return 0; - -} - -static void encode_fr(uint8_t *trau_bits, const struct decoded_trau_frame *fr) -{ - int i; - int d_idx = 0; - - trau_bits[16] = 1; - /* C1 .. C15 */ - memcpy(trau_bits+17, fr->c_bits+0, 15); - /* D1 .. D255 */ - for (i = 32; i < 304; i+= 16) { - trau_bits[i] = 1; - memcpy(trau_bits+i+1, fr->d_bits + d_idx, 15); - d_idx += 15; - } - /* D256 .. D260 */ - trau_bits[304] = 1; - memcpy(trau_bits + 305, fr->d_bits + d_idx, 5); - /* C16 .. C21 */ - memcpy(trau_bits+310, fr->c_bits+15, 6); - - /* FIXME: handle timing adjustment */ - - /* T1 .. T4 */ - memcpy(trau_bits+316, fr->t_bits+0, 4); -} - - -int encode_trau_frame(uint8_t *trau_bits, const struct decoded_trau_frame *fr) -{ - uint8_t cbits5 = get_bits(fr->c_bits, 0, 5); - - /* 16 bits of sync header */ - memset(trau_bits, 0, 16); - - switch (cbits5) { - case TRAU_FT_FR_UP: - case TRAU_FT_FR_DOWN: - case TRAU_FT_IDLE_UP: - case TRAU_FT_IDLE_DOWN: - case TRAU_FT_EFR: - encode_fr(trau_bits, fr); - break; - case TRAU_FT_AMR: - case TRAU_FT_OM_UP: - case TRAU_FT_OM_DOWN: - case TRAU_FT_DATA_UP: - case TRAU_FT_DATA_DOWN: - case TRAU_FT_D145_SYNC: - case TRAU_FT_EDATA: - LOGP(DMUX, LOGL_NOTICE, "unimplemented TRAU Frame Type " - "0x%02x\n", cbits5); - return -1; - break; - default: - LOGP(DMUX, LOGL_NOTICE, "unknown TRAU Frame Type " - "0x%02x\n", cbits5); - return -1; - break; - } - - return 0; -} - -static struct decoded_trau_frame fr_idle_frame = { - .c_bits = { 0, 1, 1, 1, 0 }, /* IDLE DOWNLINK 3.5.5 */ - .t_bits = { 1, 1, 1, 1 }, -}; -static uint8_t encoded_idle_frame[TRAU_FRAME_BITS]; -static int dbits_initted = 0; - -uint8_t *trau_idle_frame(void) -{ - /* only initialize during the first call */ - if (!dbits_initted) { - /* set all D-bits to 1 */ - memset(&fr_idle_frame.d_bits, 0x01, 260); - - memset(&fr_idle_frame.c_bits, 0x01, 25); /* spare are set to 1 */ - /* set Downlink Idle Speech Frame pattern */ - fr_idle_frame.c_bits[0] = 0; /* C1 */ - fr_idle_frame.c_bits[1] = 1; /* C2 */ - fr_idle_frame.c_bits[2] = 1; /* C3 */ - fr_idle_frame.c_bits[3] = 1; /* C4 */ - fr_idle_frame.c_bits[4] = 0; /* C5 */ - /* set no Time Alignment pattern */ - fr_idle_frame.c_bits[5] = 0; /* C6 */ - fr_idle_frame.c_bits[6] = 0; /* C7 */ - fr_idle_frame.c_bits[7] = 0; /* C8 */ - fr_idle_frame.c_bits[8] = 0; /* C9 */ - fr_idle_frame.c_bits[9] = 0; /* C10 */ - fr_idle_frame.c_bits[10] = 0; /* C11 */ - /* already set to 1, but maybe we need to modify it in the future */ - fr_idle_frame.c_bits[11] = 1; /* C12 (UFE), good frame */ - fr_idle_frame.c_bits[15] = 1; /* C16 (SP), no DTX */ - - encode_fr(encoded_idle_frame, &fr_idle_frame); - dbits_initted = 1; /* set it to 1 to not call it again */ - } - return encoded_idle_frame; -} |