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[bsc] Move the GSM 04.08 helper functions to gsm_04_08_utils.c 

The existing gsm_04_08.c implementation is mixing BSC and MSC
behavior. Move some simple parsing and generation functions over
to gsm_04_08_utils.c to allow a different MSC to define the policy.
This commit is contained in:
Holger Hans Peter Freyther 2009-08-01 07:26:59 +02:00
parent 93d4394d1d
commit 1494a768c1
5 changed files with 326 additions and 283 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
openbsc/include/openbsc/gsm_04_08.h
View File

@ -681,6 +681,11 @@ enum gsm48_bcap_rrq {
GSM48_BCAP_RRQ_DUAL_FR = 3,
};
#define GSM48_TMSI_LEN 5
#define GSM48_MID_TMSI_LEN (GSM48_TMSI_LEN + 2)
struct msgb;
struct gsm_bts;
struct gsm_subscriber;
@ -718,4 +723,6 @@ int encode_bcd_number(u_int8_t *bcd_lv, u_int8_t max_len,
int decode_bcd_number(char *output, int output_len, const u_int8_t *bcd_lv,
int h_len);
extern const char *gsm0408_cc_msg_names[];
#endif

8
openbsc/src/Makefile.am
View File

@ -5,16 +5,16 @@ sbin_PROGRAMS = bsc_hack bs11_config ipaccess-find ipaccess-config isdnsync
noinst_LIBRARIES = libbsc.a libmsc.a libvty.a
noinst_HEADERS = vty/cardshell.h
libbsc_a_SOURCES = abis_rsl.c abis_nm.c gsm_data.c \
libbsc_a_SOURCES = abis_rsl.c abis_nm.c gsm_data.c gsm_04_08_utils.c \
msgb.c select.c chan_alloc.c timer.c debug.c \
gsm_subscriber_base.c subchan_demux.c bsc_rll.c \
gsm_subscriber_base.c subchan_demux.c bsc_rll.c transaction.c \
trau_frame.c trau_mux.c paging.c e1_config.c e1_input.c tlv_parser.c \
input/misdn.c input/ipaccess.c signal.c gsm_utils.c talloc.c \
talloc_ctx.c
libmsc_a_SOURCES = gsm_subscriber.c db.c telnet_interface.c \
mncc.c rtp_proxy.c gsm_04_08.c gsm_04_11.c transaction.c token_auth.c \
rrlp.c
mncc.c rtp_proxy.c gsm_04_08.c gsm_04_11.c transaction.c \
token_auth.c rrlp.c
libvty_a_SOURCES = vty/buffer.c vty/command.c vty/vector.c vty/vty.c

282
openbsc/src/gsm_04_08.c
View File

@ -49,18 +49,13 @@
#include <openbsc/talloc.h>
#include <openbsc/transaction.h>
#define GSM48_ALLOC_SIZE 1024
#define GSM48_ALLOC_HEADROOM 128
#define GSM_MAX_FACILITY 128
#define GSM_MAX_SSVERSION 128
#define GSM_MAX_USERUSER 128
void *tall_locop_ctx;
/* should ip.access BTS use direct RTP streams between each other (1),
* or should OpenBSC always act as RTP relay/proxy in between (0) ? */
int ipacc_rtp_direct = 1;
extern int ipacc_rtp_direct;
static const struct tlv_definition rsl_att_tlvdef = {
.def = {
@ -158,73 +153,6 @@ static const char *cc_state_names[] = {
"illegal state 31",
};
static const char *cc_msg_names[] = {
"unknown 0x00",
"ALERTING",
"CALL_PROC",
"PROGRESS",
"ESTAB",
"SETUP",
"ESTAB_CONF",
"CONNECT",
"CALL_CONF",
"START_CC",
"unknown 0x0a",
"RECALL",
"unknown 0x0c",
"unknown 0x0d",
"EMERG_SETUP",
"CONNECT_ACK",
"USER_INFO",
"unknown 0x11",
"unknown 0x12",
"MODIFY_REJECT",
"unknown 0x14",
"unknown 0x15",
"unknown 0x16",
"MODIFY",
"HOLD",
"HOLD_ACK",
"HOLD_REJ",
"unknown 0x1b",
"RETR",
"RETR_ACK",
"RETR_REJ",
"MODIFY_COMPL",
"unknown 0x20",
"unknown 0x21",
"unknown 0x22",
"unknown 0x23",
"unknown 0x24",
"DISCONNECT",
"unknown 0x26",
"unknown 0x27",
"unknown 0x28",
"unknown 0x29",
"RELEASE_COMPL",
"unknown 0x2b",
"unknown 0x2c",
"RELEASE",
"unknown 0x2e",
"unknown 0x2f",
"unknown 0x30",
"STOP_DTMF",
"STOP_DTMF_ACK",
"unknown 0x33",
"STATUS_ENQ",
"START_DTMF",
"START_DTMF_ACK",
"START_DTMF_REJ",
"unknown 0x38",
"CONG_CTRL",
"FACILITY",
"unknown 0x3b",
"STATUS",
"unknown 0x3c",
"NOTIFY",
"unknown 0x3f",
};
static char strbuf[64];
static const char *rr_cause_name(u_int8_t cause)
@ -413,53 +341,6 @@ static int gsm0408_handle_lchan_signal(unsigned int subsys, unsigned int signal,
return 0;
}
static void to_bcd(u_int8_t *bcd, u_int16_t val)
{
bcd[2] = val % 10;
val = val / 10;
bcd[1] = val % 10;
val = val / 10;
bcd[0] = val % 10;
val = val / 10;
}
void gsm0408_generate_lai(struct gsm48_loc_area_id *lai48, u_int16_t mcc,
u_int16_t mnc, u_int16_t lac)
{
u_int8_t bcd[3];
to_bcd(bcd, mcc);
lai48->digits[0] = bcd[0] | (bcd[1] << 4);
lai48->digits[1] = bcd[2];
to_bcd(bcd, mnc);
/* FIXME: do we need three-digit MNC? See Table 10.5.3 */
#if 0
lai48->digits[1] |= bcd[2] << 4;
lai48->digits[2] = bcd[0] | (bcd[1] << 4);
#else
lai48->digits[1] |= 0xf << 4;
lai48->digits[2] = bcd[1] | (bcd[2] << 4);
#endif
lai48->lac = htons(lac);
}
#define TMSI_LEN 5
#define MID_TMSI_LEN (TMSI_LEN + 2)
int generate_mid_from_tmsi(u_int8_t *buf, u_int32_t tmsi)
{
u_int32_t *tptr = (u_int32_t *) &buf[3];
buf[0] = GSM48_IE_MOBILE_ID;
buf[1] = TMSI_LEN;
buf[2] = 0xf0 | GSM_MI_TYPE_TMSI;
*tptr = htonl(tmsi);
return 7;
}
static const char bcd_num_digits[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', '*', '#', 'a', 'b', 'c', '\0'
@ -979,44 +860,6 @@ static int encode_more(struct msgb *msg)
return 0;
}
struct msgb *gsm48_msgb_alloc(void)
{
return msgb_alloc_headroom(GSM48_ALLOC_SIZE, GSM48_ALLOC_HEADROOM,
"GSM 04.08");
}
int gsm48_sendmsg(struct msgb *msg, struct gsm_trans *trans)
{
struct gsm48_hdr *gh = (struct gsm48_hdr *) msg->data;
/* if we get passed a transaction reference, do some common
* work that the caller no longer has to do */
if (trans) {
gh->proto_discr = trans->protocol | (trans->transaction_id << 4);
msg->lchan = trans->lchan;
}
if (msg->lchan) {
msg->trx = msg->lchan->ts->trx;
if ((gh->proto_discr & GSM48_PDISC_MASK) == GSM48_PDISC_CC)
DEBUGP(DCC, "(bts %d trx %d ts %d ti %02x) "
"Sending '%s' to MS.\n", msg->trx->bts->nr,
msg->trx->nr, msg->lchan->ts->nr,
gh->proto_discr & 0xf0,
cc_msg_names[gh->msg_type & 0x3f]);
else
DEBUGP(DCC, "(bts %d trx %d ts %d pd %02x) "
"Sending 0x%02x to MS.\n", msg->trx->bts->nr,
msg->trx->nr, msg->lchan->ts->nr,
gh->proto_discr, gh->msg_type);
}
msg->l3h = msg->data;
return rsl_data_request(msg, 0);
}
/* Chapter 9.2.14 : Send LOCATION UPDATING REJECT */
int gsm0408_loc_upd_rej(struct gsm_lchan *lchan, u_int8_t cause)
{
@ -1055,7 +898,7 @@ int gsm0408_loc_upd_acc(struct gsm_lchan *lchan, u_int32_t tmsi)
gsm0408_generate_lai(lai, bts->network->country_code,
bts->network->network_code, bts->location_area_code);
mid = msgb_put(msg, MID_TMSI_LEN);
mid = msgb_put(msg, GSM48_MID_TMSI_LEN);
generate_mid_from_tmsi(mid, tmsi);
DEBUGP(DMM, "-> LOCATION UPDATE ACCEPT\n");
@ -1091,7 +934,7 @@ static int mi_to_string(char *string, int str_len, u_int8_t *mi, int mi_len)
break;
case GSM_MI_TYPE_TMSI:
/* Table 10.5.4.3, reverse generate_mid_from_tmsi */
if (mi_len == TMSI_LEN && mi[0] == (0xf0 | GSM_MI_TYPE_TMSI)) {
if (mi_len == GSM48_TMSI_LEN && mi[0] == (0xf0 | GSM_MI_TYPE_TMSI)) {
memcpy(&tmsi, &mi[1], 4);
tmsi = ntohl(tmsi);
return snprintf(string, str_len, "%u", tmsi);
@ -1891,30 +1734,6 @@ static int gsm0408_rcv_rr(struct msgb *msg)
return rc;
}
/* 7.1.7 and 9.1.7: RR CHANnel RELease */
int gsm48_send_rr_release(struct gsm_lchan *lchan)
{
struct msgb *msg = gsm48_msgb_alloc();
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
u_int8_t *cause;
msg->lchan = lchan;
gh->proto_discr = GSM48_PDISC_RR;
gh->msg_type = GSM48_MT_RR_CHAN_REL;
cause = msgb_put(msg, 1);
cause[0] = GSM48_RR_CAUSE_NORMAL;
DEBUGP(DRR, "Sending Channel Release: Chan: Number: %d Type: %d\n",
lchan->nr, lchan->type);
/* Send actual release request to MS */
gsm48_sendmsg(msg, NULL);
/* FIXME: Start Timer T3109 */
/* Deactivate the SACCH on the BTS side */
return rsl_deact_sacch(lchan);
}
int gsm48_send_rr_app_info(struct gsm_lchan *lchan, u_int8_t apdu_id,
u_int8_t apdu_len, u_int8_t *apdu)
@ -3756,7 +3575,7 @@ static int gsm0408_rcv_cc(struct msgb *msg)
"Received '%s' from MS in state %d (%s)\n",
lchan->ts->trx->bts->nr, lchan->ts->trx->nr, lchan->ts->nr,
transaction_id, (lchan->subscr)?(lchan->subscr->extension):"-",
cc_msg_names[msg_type], trans?(trans->cc.state):0,
gsm0408_cc_msg_names[msg_type], trans?(trans->cc.state):0,
cc_state_names[trans?(trans->cc.state):0]);
/* Create transaction */
@ -3827,99 +3646,6 @@ int gsm0408_rcvmsg(struct msgb *msg, u_int8_t link_id)
return rc;
}
/* Section 9.1.8 / Table 9.9 */
struct chreq {
u_int8_t val;
u_int8_t mask;
enum chreq_type type;
};
/* If SYSTEM INFORMATION TYPE 4 NECI bit == 1 */
static const struct chreq chreq_type_neci1[] = {
{ 0xa0, 0xe0, CHREQ_T_EMERG_CALL },
{ 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_F },
{ 0x68, 0xfc, CHREQ_T_CALL_REEST_TCH_H },
{ 0x6c, 0xfc, CHREQ_T_CALL_REEST_TCH_H_DBL },
{ 0xe0, 0xe0, CHREQ_T_SDCCH },
{ 0x40, 0xf0, CHREQ_T_VOICE_CALL_TCH_H },
{ 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H },
{ 0x00, 0xf0, CHREQ_T_LOCATION_UPD },
{ 0x10, 0xf0, CHREQ_T_SDCCH },
{ 0x80, 0xe0, CHREQ_T_PAG_R_ANY },
{ 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F },
{ 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH },
};
/* If SYSTEM INFORMATION TYPE 4 NECI bit == 0 */
static const struct chreq chreq_type_neci0[] = {
{ 0xa0, 0xe0, CHREQ_T_EMERG_CALL },
{ 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_H },
{ 0xe0, 0xe0, CHREQ_T_TCH_F },
{ 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H },
{ 0x00, 0xe0, CHREQ_T_LOCATION_UPD },
{ 0x80, 0xe0, CHREQ_T_PAG_R_ANY },
{ 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F },
{ 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH },
};
static const enum gsm_chan_t ctype_by_chreq[] = {
[CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_F,
[CHREQ_T_CALL_REEST_TCH_F] = GSM_LCHAN_TCH_F,
[CHREQ_T_CALL_REEST_TCH_H] = GSM_LCHAN_TCH_H,
[CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_LCHAN_TCH_H,
[CHREQ_T_SDCCH] = GSM_LCHAN_SDCCH,
[CHREQ_T_TCH_F] = GSM_LCHAN_TCH_F,
[CHREQ_T_VOICE_CALL_TCH_H] = GSM_LCHAN_TCH_H,
[CHREQ_T_DATA_CALL_TCH_H] = GSM_LCHAN_TCH_H,
[CHREQ_T_LOCATION_UPD] = GSM_LCHAN_SDCCH,
[CHREQ_T_PAG_R_ANY] = GSM_LCHAN_SDCCH,
[CHREQ_T_PAG_R_TCH_F] = GSM_LCHAN_TCH_F,
[CHREQ_T_PAG_R_TCH_FH] = GSM_LCHAN_TCH_F,
};
static const enum gsm_chreq_reason_t reason_by_chreq[] = {
[CHREQ_T_EMERG_CALL] = GSM_CHREQ_REASON_EMERG,
[CHREQ_T_CALL_REEST_TCH_F] = GSM_CHREQ_REASON_CALL,
[CHREQ_T_CALL_REEST_TCH_H] = GSM_CHREQ_REASON_CALL,
[CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_CHREQ_REASON_CALL,
[CHREQ_T_SDCCH] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_TCH_F] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_VOICE_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_DATA_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_LOCATION_UPD] = GSM_CHREQ_REASON_LOCATION_UPD,
[CHREQ_T_PAG_R_ANY] = GSM_CHREQ_REASON_PAG,
[CHREQ_T_PAG_R_TCH_F] = GSM_CHREQ_REASON_PAG,
[CHREQ_T_PAG_R_TCH_FH] = GSM_CHREQ_REASON_PAG,
};
enum gsm_chan_t get_ctype_by_chreq(struct gsm_bts *bts, u_int8_t ra)
{
int i;
/* FIXME: determine if we set NECI = 0 in the BTS SI4 */
for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
const struct chreq *chr = &chreq_type_neci0[i];
if ((ra & chr->mask) == chr->val)
return ctype_by_chreq[chr->type];
}
fprintf(stderr, "Unknown CHANNEL REQUEST RQD 0x%02x\n", ra);
return GSM_LCHAN_SDCCH;
}
enum gsm_chreq_reason_t get_reason_by_chreq(struct gsm_bts *bts, u_int8_t ra)
{
int i;
/* FIXME: determine if we set NECI = 0 in the BTS SI4 */
for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
const struct chreq *chr = &chreq_type_neci0[i];
if ((ra & chr->mask) == chr->val)
return reason_by_chreq[chr->type];
}
fprintf(stderr, "Unknown CHANNEL REQUEST REASON 0x%02x\n", ra);
return GSM_CHREQ_REASON_OTHER;
}
/* dequeue messages to layer 4 */
int bsc_upqueue(struct gsm_network *net)
{

310
openbsc/src/gsm_04_08_utils.c Normal file
View File

@ -0,0 +1,310 @@
/* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0
* utility functions
*/
/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <openbsc/msgb.h>
#include <openbsc/debug.h>
#include <openbsc/gsm_04_08.h>
#include <openbsc/transaction.h>
#define GSM48_ALLOC_SIZE 1024
#define GSM48_ALLOC_HEADROOM 128
/* should ip.access BTS use direct RTP streams between each other (1),
* or should OpenBSC always act as RTP relay/proxy in between (0) ? */
int ipacc_rtp_direct = 1;
const char *gsm0408_cc_msg_names[] = {
"unknown 0x00",
"ALERTING",
"CALL_PROC",
"PROGRESS",
"ESTAB",
"SETUP",
"ESTAB_CONF",
"CONNECT",
"CALL_CONF",
"START_CC",
"unknown 0x0a",
"RECALL",
"unknown 0x0c",
"unknown 0x0d",
"EMERG_SETUP",
"CONNECT_ACK",
"USER_INFO",
"unknown 0x11",
"unknown 0x12",
"MODIFY_REJECT",
"unknown 0x14",
"unknown 0x15",
"unknown 0x16",
"MODIFY",
"HOLD",
"HOLD_ACK",
"HOLD_REJ",
"unknown 0x1b",
"RETR",
"RETR_ACK",
"RETR_REJ",
"MODIFY_COMPL",
"unknown 0x20",
"unknown 0x21",
"unknown 0x22",
"unknown 0x23",
"unknown 0x24",
"DISCONNECT",
"unknown 0x26",
"unknown 0x27",
"unknown 0x28",
"unknown 0x29",
"RELEASE_COMPL",
"unknown 0x2b",
"unknown 0x2c",
"RELEASE",
"unknown 0x2e",
"unknown 0x2f",
"unknown 0x30",
"STOP_DTMF",
"STOP_DTMF_ACK",
"unknown 0x33",
"STATUS_ENQ",
"START_DTMF",
"START_DTMF_ACK",
"START_DTMF_REJ",
"unknown 0x38",
"CONG_CTRL",
"FACILITY",
"unknown 0x3b",
"STATUS",
"unknown 0x3c",
"NOTIFY",
"unknown 0x3f",
};
struct msgb *gsm48_msgb_alloc(void)
{
return msgb_alloc_headroom(GSM48_ALLOC_SIZE, GSM48_ALLOC_HEADROOM,
"GSM 04.08");
}
int gsm48_sendmsg(struct msgb *msg, struct gsm_trans *trans)
{
struct gsm48_hdr *gh = (struct gsm48_hdr *) msg->data;
/* if we get passed a transaction reference, do some common
* work that the caller no longer has to do */
if (trans) {
gh->proto_discr = trans->protocol | (trans->transaction_id << 4);
msg->lchan = trans->lchan;
}
if (msg->lchan) {
msg->trx = msg->lchan->ts->trx;
if ((gh->proto_discr & GSM48_PDISC_MASK) == GSM48_PDISC_CC)
DEBUGP(DCC, "(bts %d trx %d ts %d ti %02x) "
"Sending '%s' to MS.\n", msg->trx->bts->nr,
msg->trx->nr, msg->lchan->ts->nr,
gh->proto_discr & 0xf0,
gsm0408_cc_msg_names[gh->msg_type & 0x3f]);
else
DEBUGP(DCC, "(bts %d trx %d ts %d pd %02x) "
"Sending 0x%02x to MS.\n", msg->trx->bts->nr,
msg->trx->nr, msg->lchan->ts->nr,
gh->proto_discr, gh->msg_type);
}
msg->l3h = msg->data;
return rsl_data_request(msg, 0);
}
static void to_bcd(u_int8_t *bcd, u_int16_t val)
{
bcd[2] = val % 10;
val = val / 10;
bcd[1] = val % 10;
val = val / 10;
bcd[0] = val % 10;
val = val / 10;
}
void gsm0408_generate_lai(struct gsm48_loc_area_id *lai48, u_int16_t mcc,
u_int16_t mnc, u_int16_t lac)
{
u_int8_t bcd[3];
to_bcd(bcd, mcc);
lai48->digits[0] = bcd[0] | (bcd[1] << 4);
lai48->digits[1] = bcd[2];
to_bcd(bcd, mnc);
/* FIXME: do we need three-digit MNC? See Table 10.5.3 */
#if 0
lai48->digits[1] |= bcd[2] << 4;
lai48->digits[2] = bcd[0] | (bcd[1] << 4);
#else
lai48->digits[1] |= 0xf << 4;
lai48->digits[2] = bcd[1] | (bcd[2] << 4);
#endif
lai48->lac = htons(lac);
}
int generate_mid_from_tmsi(u_int8_t *buf, u_int32_t tmsi)
{
u_int32_t *tptr = (u_int32_t *) &buf[3];
buf[0] = GSM48_IE_MOBILE_ID;
buf[1] = GSM48_TMSI_LEN;
buf[2] = 0xf0 | GSM_MI_TYPE_TMSI;
*tptr = htonl(tmsi);
return 7;
}
/* Section 9.1.8 / Table 9.9 */
struct chreq {
u_int8_t val;
u_int8_t mask;
enum chreq_type type;
};
/* If SYSTEM INFORMATION TYPE 4 NECI bit == 1 */
static const struct chreq chreq_type_neci1[] = {
{ 0xa0, 0xe0, CHREQ_T_EMERG_CALL },
{ 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_F },
{ 0x68, 0xfc, CHREQ_T_CALL_REEST_TCH_H },
{ 0x6c, 0xfc, CHREQ_T_CALL_REEST_TCH_H_DBL },
{ 0xe0, 0xe0, CHREQ_T_SDCCH },
{ 0x40, 0xf0, CHREQ_T_VOICE_CALL_TCH_H },
{ 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H },
{ 0x00, 0xf0, CHREQ_T_LOCATION_UPD },
{ 0x10, 0xf0, CHREQ_T_SDCCH },
{ 0x80, 0xe0, CHREQ_T_PAG_R_ANY },
{ 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F },
{ 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH },
};
/* If SYSTEM INFORMATION TYPE 4 NECI bit == 0 */
static const struct chreq chreq_type_neci0[] = {
{ 0xa0, 0xe0, CHREQ_T_EMERG_CALL },
{ 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_H },
{ 0xe0, 0xe0, CHREQ_T_TCH_F },
{ 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H },
{ 0x00, 0xe0, CHREQ_T_LOCATION_UPD },
{ 0x80, 0xe0, CHREQ_T_PAG_R_ANY },
{ 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F },
{ 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH },
};
static const enum gsm_chan_t ctype_by_chreq[] = {
[CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_F,
[CHREQ_T_CALL_REEST_TCH_F] = GSM_LCHAN_TCH_F,
[CHREQ_T_CALL_REEST_TCH_H] = GSM_LCHAN_TCH_H,
[CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_LCHAN_TCH_H,
[CHREQ_T_SDCCH] = GSM_LCHAN_SDCCH,
[CHREQ_T_TCH_F] = GSM_LCHAN_TCH_F,
[CHREQ_T_VOICE_CALL_TCH_H] = GSM_LCHAN_TCH_H,
[CHREQ_T_DATA_CALL_TCH_H] = GSM_LCHAN_TCH_H,
[CHREQ_T_LOCATION_UPD] = GSM_LCHAN_SDCCH,
[CHREQ_T_PAG_R_ANY] = GSM_LCHAN_SDCCH,
[CHREQ_T_PAG_R_TCH_F] = GSM_LCHAN_TCH_F,
[CHREQ_T_PAG_R_TCH_FH] = GSM_LCHAN_TCH_F,
};
static const enum gsm_chreq_reason_t reason_by_chreq[] = {
[CHREQ_T_EMERG_CALL] = GSM_CHREQ_REASON_EMERG,
[CHREQ_T_CALL_REEST_TCH_F] = GSM_CHREQ_REASON_CALL,
[CHREQ_T_CALL_REEST_TCH_H] = GSM_CHREQ_REASON_CALL,
[CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_CHREQ_REASON_CALL,
[CHREQ_T_SDCCH] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_TCH_F] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_VOICE_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_DATA_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
[CHREQ_T_LOCATION_UPD] = GSM_CHREQ_REASON_LOCATION_UPD,
[CHREQ_T_PAG_R_ANY] = GSM_CHREQ_REASON_PAG,
[CHREQ_T_PAG_R_TCH_F] = GSM_CHREQ_REASON_PAG,
[CHREQ_T_PAG_R_TCH_FH] = GSM_CHREQ_REASON_PAG,
};
enum gsm_chan_t get_ctype_by_chreq(struct gsm_bts *bts, u_int8_t ra)
{
int i;
/* FIXME: determine if we set NECI = 0 in the BTS SI4 */
for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
const struct chreq *chr = &chreq_type_neci0[i];
if ((ra & chr->mask) == chr->val)
return ctype_by_chreq[chr->type];
}
fprintf(stderr, "Unknown CHANNEL REQUEST RQD 0x%02x\n", ra);
return GSM_LCHAN_SDCCH;
}
enum gsm_chreq_reason_t get_reason_by_chreq(struct gsm_bts *bts, u_int8_t ra)
{
int i;
/* FIXME: determine if we set NECI = 0 in the BTS SI4 */
for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
const struct chreq *chr = &chreq_type_neci0[i];
if ((ra & chr->mask) == chr->val)
return reason_by_chreq[chr->type];
}
fprintf(stderr, "Unknown CHANNEL REQUEST REASON 0x%02x\n", ra);
return GSM_CHREQ_REASON_OTHER;
}
/* 7.1.7 and 9.1.7: RR CHANnel RELease */
int gsm48_send_rr_release(struct gsm_lchan *lchan)
{
struct msgb *msg = gsm48_msgb_alloc();
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
u_int8_t *cause;
msg->lchan = lchan;
gh->proto_discr = GSM48_PDISC_RR;
gh->msg_type = GSM48_MT_RR_CHAN_REL;
cause = msgb_put(msg, 1);
cause[0] = GSM48_RR_CAUSE_NORMAL;
DEBUGP(DRR, "Sending Channel Release: Chan: Number: %d Type: %d\n",
lchan->nr, lchan->type);
/* Send actual release request to MS */
gsm48_sendmsg(msg, NULL);
/* FIXME: Start Timer T3109 */
/* Deactivate the SACCH on the BTS side */
return rsl_deact_sacch(lchan);
}

2
openbsc/tests/gsm0408/Makefile.am
View File

@ -2,4 +2,4 @@ INCLUDES = $(all_includes) -I$(top_srcdir)/include
noinst_PROGRAMS = gsm0408_test
gsm0408_test_SOURCES = gsm0408_test.c
gsm0408_test_LDADD = $(top_builddir)/src/libmsc.a $(top_builddir)/src/libbsc.a -ldbi
gsm0408_test_LDADD = $(top_builddir)/src/libbsc.a $(top_builddir)/src/libmsc.a $(top_builddir)/src/libbsc.a -ldbi