[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.
diff --git a/openbsc/include/openbsc/gsm_04_08.h b/openbsc/include/openbsc/gsm_04_08.h
index 161364c..2518dfd 100644
--- a/openbsc/include/openbsc/gsm_04_08.h
+++ b/openbsc/include/openbsc/gsm_04_08.h
@@ -681,6 +681,11 @@
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 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
diff --git a/openbsc/src/Makefile.am b/openbsc/src/Makefile.am
index cd0a0e6..30968b0 100644
--- a/openbsc/src/Makefile.am
+++ b/openbsc/src/Makefile.am
@@ -5,16 +5,16 @@
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
diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 46b4479..94f9ef4 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -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 @@
"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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
"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 @@
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)
{
diff --git a/openbsc/src/gsm_04_08_utils.c b/openbsc/src/gsm_04_08_utils.c
new file mode 100644
index 0000000..50deb2b
--- /dev/null
+++ b/openbsc/src/gsm_04_08_utils.c
@@ -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);
+}
+
diff --git a/openbsc/tests/gsm0408/Makefile.am b/openbsc/tests/gsm0408/Makefile.am
index c68b4ed..ff8caf9 100644
--- a/openbsc/tests/gsm0408/Makefile.am
+++ b/openbsc/tests/gsm0408/Makefile.am
@@ -2,4 +2,4 @@
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