-#warning rr on MDL error handling (as specified in 04.08 / 04.06)
/*
* (C) 2010 by Andreas Eversberg <jolly@eversberg.eu>
*
*
*/
+/* Testing delayed (immediate) assigment / handover
+ *
+ * When enabled, the starting time will be set by given frames in the future.
+ * If a starting time is given by the network, this time is ignored.
+ */
+//#define TEST_STARTING_TIMER 140
+
+/* Testing if frequency modification works correctly "after time".
+ *
+ * When enabled, the starting time will be set in the future.
+ * A wrong channel is defined "before time", so noise is received until
+ * starting time elapses.
+ * If a starting time is given by the network, this time is ignored.
+ * Also channel definitions "before time" are ignored.
+ *
+ * NOTE: TEST_STARTING_TIMER MUST be defined also.
+ */
+//#define TEST_FREQUENCY_MOD
+
#include <stdint.h>
#include <errno.h>
#include <stdio.h>
static void start_rr_t_monitor(struct gsm48_rrlayer *rr, int sec, int micro);
static void stop_rr_t_monitor(struct gsm48_rrlayer *rr);
+static void stop_rr_t_starting(struct gsm48_rrlayer *rr);
+static void stop_rr_t3124(struct gsm48_rrlayer *rr);
static int gsm48_rcv_rsl(struct osmocom_ms *ms, struct msgb *msg);
static int gsm48_rr_dl_est(struct osmocom_ms *ms);
return 0;
}
+int gsm48_encode_lai(struct gsm48_loc_area_id *lai, uint16_t mcc,
+ uint16_t mnc, uint16_t lac)
+{
+ lai->digits[0] = (mcc >> 8) | (mcc & 0xf0);
+ lai->digits[1] = (mcc & 0x0f) | (mnc << 4);
+ lai->digits[2] = (mnc >> 8) | (mnc & 0xf0);
+ lai->lac = htons(lac);
+
+ return 0;
+}
+
static int gsm48_decode_chan_h0(struct gsm48_chan_desc *cd, uint8_t *tsc,
uint16_t *arfcn)
{
return 0;
}
+/* decode "Cell Description" (10.5.2.2) */
+static int gsm48_decode_cell_desc(struct gsm48_cell_desc *cd, uint16_t *arfcn,
+ uint8_t *ncc, uint8_t *bcc)
+{
+ *arfcn = (cd->arfcn_hi << 8) + cd->arfcn_lo;
+ *ncc = cd->ncc;
+ *bcc = cd->bcc;
+
+ return 0;
+}
+
+/* decode "Synchronization Indication" (10.5.2.39) */
+static int gsm48_decode_sync_ind(struct gsm48_rrlayer *rr,
+ struct gsm48_sync_ind *si)
+{
+ rr->hando_sync_ind = si->si;
+ rr->hando_rot = si->rot;
+ rr->hando_nci = si->nci;
+
+ return 0;
+}
+
/* 3.1.4.3 set sequence number and increment */
static int gsm48_apply_v_sd(struct gsm48_rrlayer *rr, struct msgb *msg)
{
gsm48_rr_state_names[rr->state], gsm48_rr_state_names[state]);
/* abort handover, in case of release of dedicated mode */
- if (rr->state == GSM48_RR_ST_DEDICATED && state != rr->state) {
- rr->hando_susp_state = 0;
- rr->assign_susp_state = 0;
+ if (rr->state == GSM48_RR_ST_DEDICATED) {
+ /* disable handover / assign state */
+ rr->modify_state = GSM48_RR_MOD_NONE;
+ /* stop start_time_timer */
+ stop_rr_t_starting(rr);
+ /* stop handover timer */
+ stop_rr_t3124(rr);
}
rr->state = state;
msgb_free(msg);
/* clear all descriptions of last channel */
memset(&rr->cd_now, 0, sizeof(rr->cd_now));
- /* reset cipering */
+ /* reset ciphering */
rr->cipher_on = 0;
/* tell cell selection process to return to idle mode
* NOTE: this must be sent unbuffered, because it will
rxlev = meas->rxlev / meas->frames;
berr = meas->berr / meas->frames;
snr = meas->snr / meas->frames;
- sprintf(text, "MON: arfcn=%d lev=%s snr=%2d ber=%2d "
+ sprintf(text, "MON: f=%d lev=%s snr=%2d ber=%3d "
"LAI=%s %s %04x ID=%04x", cs->sel_arfcn,
gsm_print_rxlev(rxlev), berr, snr,
gsm_print_mcc(cs->sel_mcc),
start_rr_t_monitor(rr, 1, 0);
}
+/* special timer to assign / handover when starting time is reached */
+static void timeout_rr_t_starting(void *arg)
+{
+ struct gsm48_rrlayer *rr = arg;
+ struct msgb *nmsg;
+
+ LOGP(DRR, LOGL_INFO, "starting timer has fired\n");
+
+ /* open channel when starting timer of IMM.ASS has fired */
+ if (rr->modify_state == GSM48_RR_MOD_IMM_ASS) {
+ rr->modify_state = GSM48_RR_MOD_NONE;
+ gsm48_rr_dl_est(rr->ms);
+ return;
+ }
+
+ /* start suspension of current link */
+ LOGP(DRR, LOGL_INFO, "request suspension of data link\n");
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return;
+ gsm48_send_rsl(rr->ms, RSL_MT_SUSP_REQ, nmsg);
+}
+
/* special timer to ensure that UA is sent before disconnecting channel */
static void timeout_rr_t_rel_wait(void *arg)
{
LOGP(DRR, LOGL_INFO, "timer T3122 has fired\n");
}
+static void timeout_rr_t3124(void *arg)
+{
+ LOGP(DRR, LOGL_INFO, "timer T3124 has fired\n");
+}
+
static void timeout_rr_t3126(void *arg)
{
struct gsm48_rrlayer *rr = arg;
static void start_rr_t_rel_wait(struct gsm48_rrlayer *rr, int sec, int micro)
{
- LOGP(DRR, LOGL_INFO, "starting T_rel_wait with %d seconds\n", sec);
+ LOGP(DRR, LOGL_INFO, "starting T_rel_wait with %d.%03d seconds\n", sec,
+ micro / 1000);
rr->t_rel_wait.cb = timeout_rr_t_rel_wait;
rr->t_rel_wait.data = rr;
bsc_schedule_timer(&rr->t_rel_wait, sec, micro);
}
+static void start_rr_t_starting(struct gsm48_rrlayer *rr, int sec, int micro)
+{
+ LOGP(DRR, LOGL_INFO, "starting T_starting with %d.%03d seconds\n", sec,
+ micro / 1000);
+ rr->t_starting.cb = timeout_rr_t_starting;
+ rr->t_starting.data = rr;
+ bsc_schedule_timer(&rr->t_starting, sec, micro);
+}
+
static void start_rr_t3110(struct gsm48_rrlayer *rr, int sec, int micro)
{
- LOGP(DRR, LOGL_INFO, "starting T3110 with %d seconds\n", sec);
+ LOGP(DRR, LOGL_INFO, "starting T3110 with %d.%03d seconds\n", sec,
+ micro / 1000);
rr->t3110.cb = timeout_rr_t3110;
rr->t3110.data = rr;
bsc_schedule_timer(&rr->t3110, sec, micro);
static void start_rr_t3122(struct gsm48_rrlayer *rr, int sec, int micro)
{
- LOGP(DRR, LOGL_INFO, "starting T3122 with %d seconds\n", sec);
+ LOGP(DRR, LOGL_INFO, "starting T3122 with %d.%03d seconds\n", sec,
+ micro / 1000);
rr->t3122.cb = timeout_rr_t3122;
rr->t3122.data = rr;
bsc_schedule_timer(&rr->t3122, sec, micro);
}
+static void start_rr_t3124(struct gsm48_rrlayer *rr, int sec, int micro)
+{
+ LOGP(DRR, LOGL_INFO, "starting T3124 with %d.%03d seconds\n", sec,
+ micro / 1000);
+ rr->t3124.cb = timeout_rr_t3124;
+ rr->t3124.data = rr;
+ bsc_schedule_timer(&rr->t3124, sec, micro);
+}
+
static void start_rr_t3126(struct gsm48_rrlayer *rr, int sec, int micro)
{
- LOGP(DRR, LOGL_INFO, "starting T3126 with %d seconds\n", sec);
+ LOGP(DRR, LOGL_INFO, "starting T3126 with %d.%03d seconds\n", sec,
+ micro / 1000);
rr->t3126.cb = timeout_rr_t3126;
rr->t3126.data = rr;
bsc_schedule_timer(&rr->t3126, sec, micro);
}
}
+static void stop_rr_t_starting(struct gsm48_rrlayer *rr)
+{
+ if (bsc_timer_pending(&rr->t_starting)) {
+ LOGP(DRR, LOGL_INFO, "stopping pending timer T_starting\n");
+ bsc_del_timer(&rr->t_starting);
+ }
+}
+
static void stop_rr_t_rel_wait(struct gsm48_rrlayer *rr)
{
if (bsc_timer_pending(&rr->t_rel_wait)) {
}
}
+static void stop_rr_t3124(struct gsm48_rrlayer *rr)
+{
+ if (bsc_timer_pending(&rr->t3124)) {
+ LOGP(DRR, LOGL_INFO, "stopping pending timer T3124\n");
+ bsc_del_timer(&rr->t3124);
+ }
+}
+
static void stop_rr_t3126(struct gsm48_rrlayer *rr)
{
if (bsc_timer_pending(&rr->t3126)) {
struct gsm_settings *set = &ms->settings;
struct msgb *nmsg;
struct gsm48_hdr *gh;
+ struct gsm48_rr_hdr *nrrh;
uint8_t buf[11], *tlv;
LOGP(DRR, LOGL_INFO, "CIPHERING MODE COMPLETE (cr %d)\n", cr);
/* MI */
if (cr) {
gsm48_generate_mid_from_imsi(buf, set->imeisv);
+ /* alter MI type */
+ buf[2] = (buf[2] & ~GSM_MI_TYPE_MASK) | GSM_MI_TYPE_IMEISV;
tlv = msgb_put(nmsg, 2 + buf[1]);
memcpy(tlv, buf, 2 + buf[1]);
}
- return gsm48_send_rsl(ms, RSL_MT_DATA_REQ, nmsg);
+ gsm48_send_rsl(ms, RSL_MT_DATA_REQ, nmsg);
+
+ /* send RR_SYNC_IND(ciphering) */
+ nmsg = gsm48_rr_msgb_alloc(GSM48_RR_SYNC_IND);
+ if (!nmsg)
+ return -ENOMEM;
+ nrrh = (struct gsm48_rr_hdr *)nmsg->data;
+ nrrh->cause = RR_SYNC_CAUSE_CIPHERING;
+ return gsm48_rr_upmsg(ms, nmsg);
}
/* receive ciphering mode command */
static int gsm48_rr_rx_cip_mode_cmd(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_rrlayer *rr = &ms->rrlayer;
+ struct gsm_subscriber *subscr = &ms->subscr;
struct gsm_support *sup = &ms->support;
struct gsm48_hdr *gh = msgb_l3(msg);
struct gsm48_cip_mode_cmd *cm = (struct gsm48_cip_mode_cmd *)gh->data;
/* cipher mode response */
cr = cm->cr;
- if (sc)
- LOGP(DRR, LOGL_INFO, "CIPHERING MODE COMMAND (sc=%u, cr=%u)",
+ if (!sc)
+ LOGP(DRR, LOGL_INFO, "CIPHERING MODE COMMAND (sc=%u, cr=%u)\n",
sc, cr);
else
LOGP(DRR, LOGL_INFO, "CIPHERING MODE COMMAND (sc=%u, "
- "algo=A5/%d cr=%u)", sc, alg_id + 1, cr);
+ "algo=A5/%d cr=%u)\n", sc, alg_id + 1, cr);
/* 3.4.7.2 */
if (rr->cipher_on && sc) {
- LOGP(DRR, LOGL_INFO, "cipering already applied.\n");
+ LOGP(DRR, LOGL_NOTICE, "chiphering already applied\n");
return gsm48_rr_tx_rr_status(ms,
GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
}
/* check if we actually support this cipher */
- if ((alg_id == GSM_CIPHER_A5_1 && !sup->a5_1)
- || (alg_id == GSM_CIPHER_A5_2 && !sup->a5_2)
- || (alg_id == GSM_CIPHER_A5_3 && !sup->a5_3)
- || (alg_id == GSM_CIPHER_A5_4 && !sup->a5_4)
- || (alg_id == GSM_CIPHER_A5_5 && !sup->a5_5)
- || (alg_id == GSM_CIPHER_A5_6 && !sup->a5_6)
- || (alg_id == GSM_CIPHER_A5_7 && !sup->a5_7))
+ if (sc && ((alg_id == GSM_CIPHER_A5_1 && !sup->a5_1)
+ || (alg_id == GSM_CIPHER_A5_2 && !sup->a5_2)
+ || (alg_id == GSM_CIPHER_A5_3 && !sup->a5_3)
+ || (alg_id == GSM_CIPHER_A5_4 && !sup->a5_4)
+ || (alg_id == GSM_CIPHER_A5_5 && !sup->a5_5)
+ || (alg_id == GSM_CIPHER_A5_6 && !sup->a5_6)
+ || (alg_id == GSM_CIPHER_A5_7 && !sup->a5_7))) {
+ LOGP(DRR, LOGL_NOTICE, "algo not supported\n");
return gsm48_rr_tx_rr_status(ms,
GSM48_RR_CAUSE_CHAN_MODE_UNACCT);
+ }
+
+ /* check if we have no key */
+ if (sc && subscr->key_seq == 7) {
+ LOGP(DRR, LOGL_NOTICE, "no key available\n");
+ return gsm48_rr_tx_rr_status(ms,
+ GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
+ }
/* change to ciphering */
-#ifdef TODO
- rsl command to activate ciperhing
-#endif
rr->cipher_on = sc, rr->cipher_type = alg_id;
+ if (sc)
+ l1ctl_tx_crypto_req(ms, alg_id + 1, subscr->key, 8);
+ else
+ l1ctl_tx_crypto_req(ms, 0, NULL, 0);
- /* response */
+ /* response (using the new mode) */
return gsm48_rr_tx_cip_mode_cpl(ms, cr);
}
cm->pwr_lev = sup->pwr_lev_1800;
else
cm->pwr_lev = sup->pwr_lev_900;
- cm->a5_1 = sup->a5_1;
+ cm->a5_1 = !sup->a5_1;
cm->es_ind = sup->es_ind;
cm->rev_lev = sup->rev_lev;
cm->fc = (sup->r_gsm || sup->e_gsm);
/* given LV of mobile identity is checked agains ms */
static int gsm_match_mi(struct osmocom_ms *ms, uint8_t *mi)
{
+ struct gsm322_cellsel *cs = &ms->cellsel;
char imsi[16];
uint32_t tmsi;
uint8_t mi_type;
return 0;
memcpy(&tmsi, mi+2, 4);
if (ms->subscr.tmsi == ntohl(tmsi)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n",
ntohl(tmsi));
chan_2 = pa->cneed2;
/* first MI */
if (ms->subscr.tmsi == ntohl(pa->tmsi1)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n", ntohl(pa->tmsi1));
return gsm48_rr_chan_req(ms, gsm48_rr_chan2cause[chan_1], 1);
} else
ntohl(pa->tmsi1));
/* second MI */
if (ms->subscr.tmsi == ntohl(pa->tmsi2)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n", ntohl(pa->tmsi2));
return gsm48_rr_chan_req(ms, gsm48_rr_chan2cause[chan_2], 1);
} else
chan_4 = pa->cneed4;
/* first MI */
if (ms->subscr.tmsi == ntohl(pa->tmsi1)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n", ntohl(pa->tmsi1));
return gsm48_rr_chan_req(ms, gsm48_rr_chan2cause[chan_1], 1);
} else
ntohl(pa->tmsi1));
/* second MI */
if (ms->subscr.tmsi == ntohl(pa->tmsi2)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n", ntohl(pa->tmsi2));
return gsm48_rr_chan_req(ms, gsm48_rr_chan2cause[chan_2], 1);
} else
ntohl(pa->tmsi2));
/* thrid MI */
if (ms->subscr.tmsi == ntohl(pa->tmsi3)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n", ntohl(pa->tmsi3));
return gsm48_rr_chan_req(ms, gsm48_rr_chan2cause[chan_3], 1);
} else
ntohl(pa->tmsi3));
/* fourth MI */
if (ms->subscr.tmsi == ntohl(pa->tmsi4)
- && ms->subscr.tmsi_valid) {
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
LOGP(DPAG, LOGL_INFO, "TMSI %08x matches\n", ntohl(pa->tmsi4));
return gsm48_rr_chan_req(ms, gsm48_rr_chan2cause[chan_4], 1);
} else
int ma_len = msgb_l3len(msg) - sizeof(*ia);
uint8_t ch_type, ch_subch, ch_ts;
struct gsm48_rr_cd cd;
+#ifndef TEST_STARTING_TIMER
uint8_t *st, st_len;
+#endif
memset(&cd, 0, sizeof(cd));
}
/* starting time */
+#ifdef TEST_STARTING_TIMER
+ cd.start = 1;
+ cd.start_tm.fn = (ms->meas.last_fn + TEST_STARTING_TIMER) % 42432;
+ LOGP(DRR, LOGL_INFO, " TESTING: starting time ahead\n");
+#else
st_len = ma_len - ia->mob_alloc_len;
st = ia->mob_alloc + ia->mob_alloc_len;
if (st_len >= 3 && st[0] == GSM48_IE_START_TIME)
gsm48_decode_start_time(&cd, (struct gsm48_start_time *)(st+1));
+#endif
/* decode channel description */
LOGP(DRR, LOGL_INFO, "IMMEDIATE ASSIGNMENT:\n");
memcpy(&rr->cd_now.mob_alloc_lv, &ia->mob_alloc_len,
ia->mob_alloc_len + 1);
rr->wait_assign = 2;
+ /* reset scheduler */
+ LOGP(DRR, LOGL_INFO, "resetting scheduler\n");
+ l1ctl_tx_reset_req(ms, L1CTL_RES_T_SCHED);
+
return gsm48_rr_dl_est(ms);
}
LOGP(DRR, LOGL_INFO, "Request, but not for us.\n");
int ma_len = msgb_l3len(msg) - sizeof(*ia);
uint8_t ch_type, ch_subch, ch_ts;
struct gsm48_rr_cd cd1, cd2;
+#ifndef TEST_STARTING_TIMER
uint8_t *st, st_len;
+#endif
memset(&cd1, 0, sizeof(cd1));
memset(&cd2, 0, sizeof(cd2));
return -EINVAL;
}
+#ifdef TEST_STARTING_TIMER
+ cd1.start = 1;
+ cd2.start_tm.fn = (ms->meas.last_fn + TEST_STARTING_TIMER) % 42432;
+ memcpy(&cd2, &cd1, sizeof(cd2));
+ LOGP(DRR, LOGL_INFO, " TESTING: starting time ahead\n");
+#else
/* starting time */
st_len = ma_len - ia->mob_alloc_len;
st = ia->mob_alloc + ia->mob_alloc_len;
(struct gsm48_start_time *)(st+1));
memcpy(&cd2, &cd1, sizeof(cd2));
}
+#endif
/* decode channel description */
LOGP(DRR, LOGL_INFO, "IMMEDIATE ASSIGNMENT EXTENDED:\n");
memcpy(&rr->cd_now.mob_alloc_lv, &ia->mob_alloc_len,
ia->mob_alloc_len + 1);
rr->wait_assign = 2;
+ /* reset scheduler */
+ LOGP(DRR, LOGL_INFO, "resetting scheduler\n");
+ l1ctl_tx_reset_req(ms, L1CTL_RES_T_SCHED);
+
return gsm48_rr_dl_est(ms);
}
/* request ref 1 */
memcpy(&rr->cd_now.mob_alloc_lv, &ia->mob_alloc_len,
ia->mob_alloc_len + 1);
rr->wait_assign = 2;
+ /* reset scheduler */
+ LOGP(DRR, LOGL_INFO, "resetting scheduler\n");
+ l1ctl_tx_reset_req(ms, L1CTL_RES_T_SCHED);
+
return gsm48_rr_dl_est(ms);
}
LOGP(DRR, LOGL_INFO, "Request, but not for us.\n");
return 0;
}
-/* 9.1.1 ADDITIONAL ASSIGMENT is received */
+/* 9.1.1 ADDITIONAL ASSIGMENT is received */
static int gsm48_rr_rx_add_ass(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
struct gsm_settings *set = &ms->settings;
uint8_t ch_type, ch_subch, ch_ts;
- /* reset scheduler */
- LOGP(DRR, LOGL_INFO, "resetting scheduler\n");
- l1ctl_tx_reset_req(ms, L1CTL_RES_T_SCHED);
-
/* setting (new) timing advance */
LOGP(DRR, LOGL_INFO, "setting indicated TA %d (actual TA %d)\n",
cd->ind_ta, cd->ind_ta - set->alter_delay);
return 0;
}
+/* frequency change of channel "after time" */
+static int gsm48_rr_channel_after_time(struct osmocom_ms *ms,
+ struct gsm48_rr_cd *cd, uint16_t *ma, uint8_t ma_len, uint16_t fn)
+{
+ if (cd->h)
+ l1ctl_tx_dm_freq_req_h1(ms, cd->maio, cd->hsn,
+ ma, ma_len, cd->tsc, fn);
+ else
+ l1ctl_tx_dm_freq_req_h0(ms, cd->arfcn, cd->tsc, fn);
+
+#warning FIXME: channel mode, cyphering command
+
+ return 0;
+}
+
/* render list of hopping channels from channel description elements */
static int gsm48_rr_render_ma(struct osmocom_ms *ms, struct gsm48_rr_cd *cd,
uint16_t *ma, uint8_t *ma_len)
cd->mob_alloc_lv[0], ma, ma_len, 0);
if (*ma_len < 1) {
LOGP(DRR, LOGL_NOTICE, "mobile allocation with no "
- "frequency\n");
- return GSM48_RR_CAUSE_ABNORMAL_UNSPEC;
+ "frequency available\n");
+ return GSM48_RR_CAUSE_NO_CELL_ALLOC_A;
+
}
} else
/* decode frequency list */
}
}
-#if 0
- if (no CA) {
- LOGP(DRR, LOGL_NOTICE, "No current cell allocation available.\n");
- return GSM48_GSM48_RR_CAUSE_NO_CELL_ALLOC_A;
- }
-#endif
-
return 0;
}
static int gsm48_rr_dl_est(struct osmocom_ms *ms)
{
struct gsm48_rrlayer *rr = &ms->rrlayer;
+ struct gsm322_cellsel *cs = &ms->cellsel;
struct gsm_subscriber *subscr = &ms->subscr;
struct msgb *nmsg;
struct gsm48_hdr *gh;
uint16_t ma[64];
uint8_t ma_len;
+ /* check if we have to change channel at starting time (we delay) */
+ if (rr->cd_now.start) {
+ int32_t now, start, diff;
+ uint32_t start_mili = 0;
+
+ /* how much time do we have left? */
+ now = ms->meas.last_fn % 42432;
+ start = rr->cd_now.start_tm.fn % 42432;
+ diff = start - now;
+ if (diff < 0)
+ diff += 42432;
+ LOGP(DRR, LOGL_INFO, " (Tnow %d Tstart %d diff %d)\n",
+ now, start, diff);
+ start_mili = (uint32_t)diff * 19580 / 42432 * 10;
+ if (diff >= 32024 || !start_mili) {
+ LOGP(DRR, LOGL_INFO, " -> Start time already "
+ "elapsed\n");
+ rr->cd_now.start = 0;
+ } else {
+ LOGP(DRR, LOGL_INFO, " -> Start time is %d ms in the "
+ "future\n", start_mili);
+ }
+
+#ifndef TEST_FREQUENCY_MOD
+ /* schedule start of IMM.ASS */
+ rr->modify_state = GSM48_RR_MOD_IMM_ASS;
+ start_rr_t_starting(rr, start_mili / 1000,
+ (start_mili % 1000) * 1000);
+ /* when timer fires, start time is already elapsed */
+ rr->cd_now.start = 0;
+
+ return 0;
+#endif
+ }
+
/* get hopping sequence, if required */
if (gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len))
return -EINVAL;
pr->cm2_len = sizeof(pr->cm2);
gsm48_rr_enc_cm2(ms, &pr->cm2);
/* mobile identity */
- if (ms->subscr.tmsi_valid) {
+ if (ms->subscr.tmsi != 0xffffffff
+ && ms->subscr.mcc == cs->sel_mcc
+ && ms->subscr.mnc == cs->sel_mnc
+ && ms->subscr.lac == cs->sel_lac) {
gsm48_generate_mid_from_tmsi(mi, subscr->tmsi);
LOGP(DRR, LOGL_INFO, "sending paging response with "
"TMSI\n");
memcpy(pr->data, mi + 1, 1 + mi[1]);
}
+#ifdef TEST_FREQUENCY_MOD
+ LOGP(DRR, LOGL_INFO, " TESTING: frequency modify IMM.ASS\n");
+ memcpy(&rr->cd_before, &rr->cd_now, sizeof(rr->cd_before));
+ rr->cd_before.h = 0;
+ rr->cd_before.arfcn = 0;
+ /* activate channel */
+ gsm48_rr_activate_channel(ms, &rr->cd_before, ma, ma_len);
+ /* render channel "after time" */
+ gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
+ /* schedule change of channel */
+ gsm48_rr_channel_after_time(ms, &rr->cd_now, ma, ma_len,
+ rr->cd_now.start_tm.fn);
+#else
/* activate channel */
gsm48_rr_activate_channel(ms, &rr->cd_now, ma, ma_len);
+#endif
/* start establishmnet */
return gsm48_send_rsl(ms, RSL_MT_EST_REQ, nmsg);
}
/*
- * chanel mode modify, assignment, and handover
+ * frequency redefition, chanel mode modify, assignment, and handover
*/
+/* 9.1.13 FREQUENCY REDEFINITION is received */
+static int gsm48_rr_rx_frq_redef(struct osmocom_ms *ms, struct msgb *msg)
+{
+#warning disabled, until added to libosmocore
+#if 0
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
+ struct gsm48_frq_redef *fr = msgb_l3(msg);
+ int mob_al_len = msgb_l3len(msg) - sizeof(*fr);
+ uint8_t ch_type, ch_subch, ch_ts;
+ struct gsm48_rr_cd cd;
+ uint8_t cause;
+ uint8_t *st;
+ uint16_t ma[64];
+ uint8_t ma_len;
+
+ memcpy(&cd, &rr->cd_now, sizeof(cd));
+
+ if (mob_al_len < 0 /* mobile allocation IE must be included */
+ || fr->mob_alloc_len + 2 > mob_al_len) { /* short read of IE */
+ LOGP(DRR, LOGL_NOTICE, "Short read of FREQUENCY REDEFINITION "
+ "message.\n");
+ return -EINVAL;
+ }
+ if (fr->mob_alloc_len > 8) {
+ LOGP(DRR, LOGL_NOTICE, "Moble allocation in FREQUENCY "
+ "REDEFINITION too large.\n");
+ return -EINVAL;
+ }
+
+ /* decode channel description */
+ LOGP(DRR, LOGL_INFO, "FREQUENCY REDEFINITION:\n");
+ cd.chan_nr = fr->chan_desc.chan_nr;
+ rsl_dec_chan_nr(cd.chan_nr, &ch_type, &ch_subch, &ch_ts);
+ if (fr->chan_desc.h0.h) {
+ cd.h = 1;
+ gsm48_decode_chan_h1(&fr->chan_desc, &cd.tsc, &cd.maio,
+ &cd.hsn);
+ LOGP(DRR, LOGL_INFO, " (MAIO %u HSN %u TS %u SS %u TSC %u)\n",
+ cd.maio, cd.hsn, ch_ts, ch_subch, cd.tsc);
+ } else {
+ cd.h = 0;
+ gsm48_decode_chan_h0(&fr->chan_desc, &cd.tsc, &cd.arfcn);
+ LOGP(DRR, LOGL_INFO, " (ARFCN %u TS %u SS %u TSC %u)\n",
+ cd.arfcn, ch_ts, ch_subch, cd.tsc);
+ }
+
+ /* mobile allocation */
+ memcpy(&rr->cd_now.mob_alloc_lv, &fr->mob_alloc_len,
+ fr->mob_alloc_len + 1);
+
+ /* starting time */
+ st = fr->mob_alloc + fr->mob_alloc_len;
+ gsm48_decode_start_time(&cd, (struct gsm48_start_time *)(st+1));
+
+ /* cell channel description */
+ if (mob_al_len >= fr->mob_alloc_len + 2 + 17
+ && fr->mob_alloc[fr->mob_alloc_len + 2] == GSM48_IE_CELL_CH_DESC) {
+ const uint8_t *v = fr->mob_alloc + fr->mob_alloc_len + 3 + 1;
+
+ LOGP(DRR, LOGL_INFO, " using cell channel description)\n");
+ memcpy(&cd.cell_desc_lv + 1, v, 17);
+ cd.cell_desc_lv[0] = 16;
+ }
+
+ /* render channel "after time" */
+ cause = gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
+ if (cause)
+ return gsm48_rr_tx_rr_status(ms, cause);
+
+ /* update to new channel data */
+ memcpy(&rr->cd_now, &cd, sizeof(rr->cd_now));
+
+ /* schedule change of channel */
+ gsm48_rr_channel_after_time(ms, &rr->cd_now, ma, ma_len,
+ rr->cd_now.start_tm.fn);
+
+ rr->cd_now.start = 0;
+
+#endif
+ return 0;
+}
+
/* 9.1.6 sending CHANNEL MODE MODIFY ACKNOWLEDGE */
static int gsm48_rr_tx_chan_modify_ack(struct osmocom_ms *ms,
struct gsm48_chan_desc *cd, uint8_t mode)
LOGP(DRR, LOGL_ERROR, "Mode %u not supported!\n", mode);
}
rr->cd_now.mode = mode;
-#warning FIXME: set mode
+#warning FIXME: channel mode
return gsm48_rr_tx_chan_modify_ack(ms, &cm->chan_desc, mode);
}
}
/* starting time */
+#ifdef TEST_STARTING_TIMER
+ cda->start = 1;
+ cda->start_tm.fn = (ms->meas.last_fn + TEST_STARTING_TIMER) % 42432;
+ LOGP(DRR, LOGL_INFO, " TESTING: starting time ahead\n");
+#else
if (TLVP_PRESENT(&tp, GSM48_IE_START_TIME)) {
gsm48_decode_start_time(cda, (struct gsm48_start_time *)
TLVP_VAL(&tp, GSM48_IE_START_TIME));
/* 9.1.2.5 "... before time IE is not present..." */
if (!before_time) {
LOGP(DRR, LOGL_INFO, " -> channel description after "
- "time only, using it before time also\n");
- before_time = 1;
- cdb->tsc = cda->tsc;
- cdb->h = cda->h;
- cdb->arfcn = cda->arfcn;
- cdb->maio = cda->maio;
- cdb->hsn = cda->hsn;
- cdb->chan_nr = cda->chan_nr;
+ "time only, but starting time\n");
} else
LOGP(DRR, LOGL_INFO, " -> channel description before "
"and after time\n");
"time, but no starting time, ignoring!\n");
}
}
+#endif
/* mobile allocation / frequency list after time */
if (cda->h) {
LOGP(DRR, LOGL_INFO, " both: (tx_power %d TA %d)\n", cda->ind_tx_power,
cda->ind_ta);
- /* check if we have to change channel "before time" */
- if (before_time) {
- uint16_t now, start, diff;
+ /* check if we have to change channel at starting time */
+ if (cda->start) {
+ int32_t now, start, diff;
/* how much time do we have left? */
now = ms->meas.last_fn % 42432;
start = cda->start_tm.fn % 42432;
- diff = (start - now) % 42432;
- LOGP(DRR, LOGL_INFO, " after: (Tnow %d Tstart %d)\n", now,
- start);
- if (diff >= 32024) {
- LOGP(DRR, LOGL_INFO, " -> Start time is in the past\n");
+ diff = start - now;
+ if (diff < 0)
+ diff += 42432;
+ LOGP(DRR, LOGL_INFO, " after: (Tnow %d Tstart %d diff %d)\n",
+ now, start, diff);
+ start_mili = (uint32_t)diff * 19580 / 42432 * 10;
+ if (diff >= 32024 || !start_mili) {
+ LOGP(DRR, LOGL_INFO, " -> Start time already "
+ "elapsed\n");
before_time = 0;
+ cda->start = 0;
} else {
- start_mili = (uint32_t)diff * 19580 / 42432 * 10;
LOGP(DRR, LOGL_INFO, " -> Start time is %d ms in the "
"future\n", start_mili);
- /* GSM 05.10 Clause 6.8 */
- if (start_mili < 120) {
- LOGP(DRR, LOGL_INFO, " -> Start time too close "
- "in the future, ignoring channel "
- "before time\n");
- before_time = 0;
- }
}
}
}
#endif
+#ifdef TEST_FREQUENCY_MOD
+ LOGP(DRR, LOGL_INFO, " TESTING: frequency modify ASS.CMD\n");
+ before_time = 1;
+ memcpy(cdb, cda, sizeof(*cdb));
+ cdb->h = 0;
+ cdb->arfcn = 0;
+#endif
+
/* schedule start of assignment */
- if (before_time) {
- LOGP(DRR, LOGL_INFO, "FIXME starting time not supported yet\n");
- return -ENOTSUP;
+ rr->modify_state = GSM48_RR_MOD_ASSIGN;
+ if (!before_time && cda->start) {
+ start_rr_t_starting(rr, start_mili / 1000, start_mili % 1000);
+ /* when timer fires, start time is already elapsed */
+ cda->start = 0;
+
+ return 0;
}
- /* start suspension of current link */
+ /* if no starting time, start suspension of current link directly */
LOGP(DRR, LOGL_INFO, "request suspension of data link\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gsm48_send_rsl(ms, RSL_MT_SUSP_REQ, nmsg);
- /* change into special assignment suspension state */
- rr->assign_susp_state = 1;
- rr->resume_last_state = 0;
-
return 0;
}
-/* send all queued messages down to layer 2 */
-static int gsm48_rr_dequeue_down(struct osmocom_ms *ms)
+/* 9.1.16 sending HANDOVER COMPLETE */
+static int gsm48_rr_tx_hando_cpl(struct osmocom_ms *ms, uint8_t cause)
{
- struct gsm48_rrlayer *rr = &ms->rrlayer;
- struct msgb *msg;
+#warning disabled, until added to libosmocore
+#if 0
+ struct msgb *nmsg;
+ struct gsm48_hdr *gh;
+ struct gsm48_ho_cpl *hc;
- while((msg = msgb_dequeue(&rr->downqueue))) {
- LOGP(DRR, LOGL_INFO, "Sending queued message.\n");
- gsm48_send_rsl(ms, RSL_MT_DATA_REQ, msg);
- }
+ LOGP(DRR, LOGL_INFO, "HANDOVER COMPLETE (cause #%d)\n", cause);
- return 0;
-}
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return -ENOMEM;
+ gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
+ hc = (struct gsm48_ho_cpl *) msgb_put(nmsg, sizeof(*hc));
-/* channel is resumed in dedicated mode */
-static int gsm48_rr_estab_cnf_dedicated(struct osmocom_ms *ms, struct msgb *msg)
-{
- struct gsm48_rrlayer *rr = &ms->rrlayer;
+ gh->proto_discr = GSM48_PDISC_RR;
+ gh->msg_type = GSM48_MT_RR_HANDO_COMPL;
- if (rr->hando_susp_state || rr->assign_susp_state) {
- LOGP(DRR, LOGL_INFO, "data link is resumed\n");
+ /* RR_CAUSE */
+ hc->rr_cause = cause;
- if (rr->resume_last_state) {
- rr->resume_last_state = 0;
- gsm48_rr_tx_ass_fail(ms,
- GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
- } else {
- gsm48_rr_tx_ass_cpl(ms, GSM48_RR_CAUSE_NORMAL);
- }
- /* transmit queued frames during ho / ass transition */
- gsm48_rr_dequeue_down(ms);
- }
+ // FIXME: mobile observed time
- return 0;
+ return gsm48_send_rsl(ms, RSL_MT_DATA_REQ, nmsg);
+#endif
}
-/* suspend confirm in dedicated mode */
-static int gsm48_rr_susp_cnf_dedicated(struct osmocom_ms *ms, struct msgb *msg)
+/* 9.1.4 sending HANDOVER FAILURE */
+static int gsm48_rr_tx_hando_fail(struct osmocom_ms *ms, uint8_t cause)
{
- struct gsm48_rrlayer *rr = &ms->rrlayer;
-
- if (rr->hando_susp_state || rr->assign_susp_state) {
- struct msgb *nmsg;
- uint16_t ma[64];
- uint8_t ma_len;
-
- LOGP(DRR, LOGL_INFO, "suspend complete, request resume of "
- "data link\n");
+#warning disabled, until added to libosmocore
+#if 0
+ struct msgb *nmsg;
+ struct gsm48_hdr *gh;
+ struct gsm48_ho_fail *hf;
- /* deactivating dedicated mode */
- LOGP(DRR, LOGL_INFO, "leaving dedicated mode\n");
- l1ctl_tx_dm_rel_req(rr->ms);
+ LOGP(DRR, LOGL_INFO, "HANDOVER FAILURE (cause #%d)\n", cause);
- /* store current channel descriptions */
- memcpy(&rr->cd_last, &rr->cd_now, sizeof(rr->cd_last));
- /* copy channel description "after time" */
- memcpy(&rr->cd_now, &rr->cd_after, sizeof(rr->cd_now));
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return -ENOMEM;
+ gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
+ hf = (struct gsm48_ho_fail *) msgb_put(nmsg, sizeof(*hf));
- /* render and activate channel */
- gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
- gsm48_rr_activate_channel(ms, &rr->cd_now, ma, ma_len);
+ gh->proto_discr = GSM48_PDISC_RR;
+ gh->msg_type = GSM48_MT_RR_ASS_COMPL;
- /* send DL-RESUME REQUEST */
- LOGP(DRR, LOGL_INFO, "request resume of data link\n");
- nmsg = gsm48_l3_msgb_alloc();
- if (!nmsg)
- return -ENOMEM;
- gsm48_send_rsl(ms, RSL_MT_RES_REQ, nmsg);
+ /* RR_CAUSE */
+ hf->rr_cause = cause;
-#ifdef TODO
- /* trigger RACH */
- if (rr->hando_susp_state) {
- gsm48_rr_tx_hando_access(ms);
- rr->hando_acc_left = 3;
- }
+ return gsm48_send_rsl(ms, RSL_MT_DATA_REQ, nmsg);
#endif
- }
- return 0;
}
-/*
- * radio ressource requests
- */
-
-/* establish request for dedicated mode */
-static int gsm48_rr_est_req(struct osmocom_ms *ms, struct msgb *msg)
+/* receiving HANDOVER COMMAND message (9.1.15) */
+static int gsm48_rr_rx_hando_cmd(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_rrlayer *rr = &ms->rrlayer;
- struct gsm322_cellsel *cs = &ms->cellsel;
- struct gsm48_sysinfo *s = cs->si;
- struct gsm_subscriber *subscr = &ms->subscr;
- struct gsm48_rr_hdr *rrh = (struct gsm48_rr_hdr *) msg->data;
struct gsm48_hdr *gh = msgb_l3(msg);
- uint8_t cause;
- struct msgb *nmsg;
+ struct gsm48_ho_cmd *ho = (struct gsm48_ho_cmd *)gh->data;
+ int payload_len = msgb_l3len(msg) - sizeof(*gh) - sizeof(*ho);
+ struct tlv_parsed tp;
+ struct gsm48_rr_cd *cda = &rr->cd_after;
+ struct gsm48_rr_cd *cdb = &rr->cd_before;
+ uint16_t arfcn;
+ uint8_t bcc, ncc;
+ uint8_t ch_type, ch_subch, ch_ts;
+ uint8_t before_time = 0;
+ uint16_t ma[64];
+ uint8_t ma_len;
+ uint32_t start_mili = 0;
+ uint8_t cause;
+ struct msgb *nmsg;
+
+ LOGP(DRR, LOGL_INFO, "HANDOVER COMMAND\n");
+
+ memset(cda, 0, sizeof(*cda));
+ memset(cdb, 0, sizeof(*cdb));
+
+ if (payload_len < 0) {
+ LOGP(DRR, LOGL_NOTICE, "Short read of HANDOVER COMMAND "
+ "message.\n");
+ return gsm48_rr_tx_rr_status(ms,
+ GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
+ }
+
+ /* cell description */
+ gsm48_decode_cell_desc(&ho->cell_desc, &arfcn, &ncc, &bcc);
+
+ /* handover reference */
+ rr->chan_req_val = ho->ho_ref;
+ rr->chan_req_mask = 0x00;
+
+ /* sync ind */
+ if (TLVP_PRESENT(&tp, GSM48_IE_SYNC_IND)) {
+ gsm48_decode_sync_ind(rr, (struct gsm48_sync_ind *)
+ TLVP_VAL(&tp, GSM48_IE_SYNC_IND));
+ LOGP(DRR, LOGL_INFO, " (sync_ind=%d rot=%d nci=%d)\n",
+ rr->hando_sync_ind, rr->hando_rot, rr->hando_nci);
+ }
+
+ tlv_parse(&tp, &gsm48_rr_att_tlvdef, ho->data, payload_len, 0, 0);
+
+ /* decode channel description (before time) */
+ if (TLVP_PRESENT(&tp, GSM48_IE_CH_DESC_1_BEFORE)) {
+ struct gsm48_chan_desc *ccd = (struct gsm48_chan_desc *)
+ TLVP_VAL(&tp, GSM48_IE_CH_DESC_1_BEFORE);
+ cdb->chan_nr = ccd->chan_nr;
+ rsl_dec_chan_nr(cdb->chan_nr, &ch_type, &ch_subch, &ch_ts);
+ if (ccd->h0.h) {
+ cdb->h = 1;
+ gsm48_decode_chan_h1(ccd, &cdb->tsc, &cdb->maio,
+ &cdb->hsn);
+ LOGP(DRR, LOGL_INFO, " before: (chan_nr 0x%02x MAIO %u "
+ "HSN %u TS %u SS %u TSC %u)\n", ccd->chan_nr,
+ cdb->maio, cdb->hsn, ch_ts, ch_subch, cdb->tsc);
+ } else {
+ cdb->h = 0;
+ gsm48_decode_chan_h0(ccd, &cdb->tsc, &cdb->arfcn);
+ LOGP(DRR, LOGL_INFO, " before: (chan_nr 0x%02x "
+ "ARFCN %u TS %u SS %u TSC %u)\n", ccd->chan_nr,
+ cdb->arfcn, ch_ts, ch_subch, cdb->tsc);
+ }
+ before_time = 1;
+ }
+
+ /* decode channel description (after time) */
+ cda->chan_nr = ho->chan_desc.chan_nr;
+ rsl_dec_chan_nr(cda->chan_nr, &ch_type, &ch_subch, &ch_ts);
+ if (ho->chan_desc.h0.h) {
+ cda->h = 1;
+ gsm48_decode_chan_h1(&ho->chan_desc, &cda->tsc, &cda->maio,
+ &cda->hsn);
+ LOGP(DRR, LOGL_INFO, " after: (chan_nr 0x%02x MAIO %u HSN %u "
+ "TS %u SS %u TSC %u)\n", ho->chan_desc.chan_nr,
+ cda->maio, cda->hsn, ch_ts, ch_subch, cda->tsc);
+ } else {
+ cda->h = 0;
+ gsm48_decode_chan_h0(&ho->chan_desc, &cda->tsc, &cda->arfcn);
+ LOGP(DRR, LOGL_INFO, " after: (chan_nr 0x%02x ARFCN %u TS %u "
+ "SS %u TSC %u)\n", ho->chan_desc.chan_nr,
+ cda->arfcn, ch_ts, ch_subch, cda->tsc);
+ }
+
+ /* starting time */
+#ifdef TEST_STARTING_TIMER
+ cda->start = 1;
+ cda->start_tm.fn = (ms->meas.last_fn + TEST_STARTING_TIMER) % 42432;
+ LOGP(DRR, LOGL_INFO, " TESTING: starting time ahead\n");
+#else
+ if (TLVP_PRESENT(&tp, GSM48_IE_START_TIME)) {
+ gsm48_decode_start_time(cda, (struct gsm48_start_time *)
+ TLVP_VAL(&tp, GSM48_IE_START_TIME));
+ /* 9.1.2.5 "... before time IE is not present..." */
+ if (!before_time) {
+ LOGP(DRR, LOGL_INFO, " -> channel description after "
+ "time only, but starting time\n");
+ } else
+ LOGP(DRR, LOGL_INFO, " -> channel description before "
+ "and after time\n");
+ } else {
+ /* 9.1.2.5 "... IEs unnecessary in this message." */
+ if (before_time) {
+ before_time = 0;
+ LOGP(DRR, LOGL_INFO, " -> channel description before "
+ "time, but no starting time, ignoring!\n");
+ }
+ }
+#endif
+
+ /* mobile allocation / frequency list after time */
+ if (cda->h) {
+ if (TLVP_PRESENT(&tp, GSM48_IE_MA_AFTER)) {
+ const uint8_t *lv =
+ TLVP_VAL(&tp, GSM48_IE_MA_AFTER) - 1;
+
+ LOGP(DRR, LOGL_INFO, " after: hopping required and "
+ "mobile allocation available\n");
+ if (*lv + 1 > sizeof(cda->mob_alloc_lv)) {
+ LOGP(DRR, LOGL_ERROR, "Error: no LV space!\n");
+ return -ENOMEM;
+ }
+ memcpy(&cda->mob_alloc_lv, lv, *lv + 1);
+ } else
+ if (TLVP_PRESENT(&tp, GSM48_IE_FREQ_L_AFTER)) {
+ const uint8_t *lv =
+ TLVP_VAL(&tp, GSM48_IE_FREQ_L_AFTER) - 1;
+
+ LOGP(DRR, LOGL_INFO, " after: hopping required and "
+ "frequency list available\n");
+ if (*lv + 1 > sizeof(cda->freq_list_lv)) {
+ LOGP(DRR, LOGL_ERROR, "Error: no LV space!\n");
+ return -ENOMEM;
+ }
+ memcpy(&cda->freq_list_lv, lv, *lv + 1);
+ } else {
+ LOGP(DRR, LOGL_NOTICE, " after: hopping required, but "
+ "no mobile allocation / frequency list\n");
+ }
+ }
+
+ /* mobile allocation / frequency list before time */
+ if (cdb->h) {
+ if (TLVP_PRESENT(&tp, GSM48_IE_MA_BEFORE)) {
+ const uint8_t *lv =
+ TLVP_VAL(&tp, GSM48_IE_MA_BEFORE) - 1;
+
+ LOGP(DRR, LOGL_INFO, " before: hopping required and "
+ "mobile allocation available\n");
+ if (*lv + 1 > sizeof(cdb->mob_alloc_lv)) {
+ LOGP(DRR, LOGL_ERROR, "Error: no LV space!\n");
+ return -ENOMEM;
+ }
+ memcpy(&cdb->mob_alloc_lv, lv, *lv + 1);
+ } else
+ if (TLVP_PRESENT(&tp, GSM48_IE_FREQ_L_BEFORE)) {
+ const uint8_t *lv =
+ TLVP_VAL(&tp, GSM48_IE_FREQ_L_BEFORE) - 1;
+
+ LOGP(DRR, LOGL_INFO, " before: hopping required and "
+ "frequency list available\n");
+ if (*lv + 1 > sizeof(cdb->freq_list_lv)) {
+ LOGP(DRR, LOGL_ERROR, "Error: no LV space!\n");
+ return -ENOMEM;
+ }
+ memcpy(&cdb->freq_list_lv, lv, *lv + 1);
+ } else
+ if (TLVP_PRESENT(&tp, GSM48_IE_F_CH_SEQ_BEFORE)) {
+ const uint8_t *lv =
+ TLVP_VAL(&tp, GSM48_IE_F_CH_SEQ_BEFORE) - 1;
+
+ LOGP(DRR, LOGL_INFO, " before: hopping required and "
+ "frequency channel sequence available\n");
+ if (*lv + 1 > sizeof(cdb->freq_seq_lv)) {
+ LOGP(DRR, LOGL_ERROR, "Error: no LV space!\n");
+ return -ENOMEM;
+ }
+ memcpy(&cdb->freq_seq_lv, lv, *lv + 1);
+ } else
+ if (cda->mob_alloc_lv[0]) {
+ LOGP(DRR, LOGL_INFO, " before: hopping required and "
+ "mobile allocation not available, using "
+ "mobile allocation after time\n");
+ memcpy(&cdb->mob_alloc_lv, &cda->mob_alloc_lv,
+ sizeof(cdb->mob_alloc_lv));
+ if (cda->freq_list_lv[0]) {
+ LOGP(DRR, LOGL_INFO, " before: hopping required and "
+ "frequency list not available, using "
+ "frequency list after time\n");
+ memcpy(&cdb->freq_list_lv, &cda->freq_list_lv,
+ sizeof(cdb->freq_list_lv));
+ } else {
+ LOGP(DRR, LOGL_NOTICE, " before: hopping required, but "
+ "no mobile allocation / frequency list\n");
+ }
+ }
+
+ /* cell channel description */
+ if (TLVP_PRESENT(&tp, GSM48_IE_CELL_CH_DESC)) {
+ const uint8_t *lv = TLVP_VAL(&tp, GSM48_IE_CELL_CH_DESC) - 1;
+
+ LOGP(DRR, LOGL_INFO, " both: using cell channel description "
+ "in case of mobile allocation\n");
+ if (*lv + 1 > sizeof(cdb->cell_desc_lv)) {
+ LOGP(DRR, LOGL_ERROR, "Error: no LV space!\n");
+ return -ENOMEM;
+ }
+ memcpy(&cdb->cell_desc_lv, lv, *lv + 1);
+ memcpy(&cda->cell_desc_lv, lv, *lv + 1);
+ } else {
+ /* keep old */
+ memcpy(&cdb->cell_desc_lv, &rr->cd_now.cell_desc_lv,
+ sizeof(cdb->cell_desc_lv));
+ memcpy(&cda->cell_desc_lv, &rr->cd_now.cell_desc_lv,
+ sizeof(cda->cell_desc_lv));
+ }
+
+ /* channel mode */
+ if (TLVP_PRESENT(&tp, GSM48_IE_CHANMODE_1)) {
+ cda->mode = cdb->mode = *TLVP_VAL(&tp, GSM48_IE_CHANMODE_1);
+ LOGP(DRR, LOGL_INFO, " both: changing channel mode 0x%02x\n",
+ cda->mode);
+ } else
+ cda->mode = cdb->mode = rr->cd_now.mode;
+
+ /* cipher mode setting */
+ if (TLVP_PRESENT(&tp, GSM48_IE_CIP_MODE_SET))
+ cda->cipher = cdb->cipher =
+ *TLVP_VAL(&tp, GSM48_IE_CIP_MODE_SET);
+ LOGP(DRR, LOGL_INFO, " both: changing cipher mode 0x%02x\n",
+ cda->cipher);
+ } else
+ cda->cipher = cdb->cipher = rr->cd_now.cipher;
+
+ /* power command and TA (before and after time) */
+ gsm48_decode_power_cmd_acc(
+ (struct gsm48_power_cmd *) &ho->power_command,
+ &cda->ind_tx_power, &rr->hando_act);
+ cdb->ind_tx_power = cda->ind_tx_power;
+ cda->ind_ta = cdb->ind_ta = rr->cd_now.ind_ta; /* same cell */
+ LOGP(DRR, LOGL_INFO, " both: (tx_power %d TA %d access=%s)\n",
+ cda->ind_tx_power, cda->ind_ta,
+ (rr->hando_act) ? "optional" : "mandatory");
+
+ /* check if we have to change channel at starting time */
+ if (cda->start) {
+ int32_t now, start, diff;
+
+ /* how much time do we have left? */
+ now = ms->meas.last_fn % 42432;
+ start = cda->start_tm.fn % 42432;
+ diff = start - now;
+ if (diff < 0)
+ diff += 42432;
+ LOGP(DRR, LOGL_INFO, " after: (Tnow %d Tstart %d diff %d)\n",
+ now, start, diff);
+ start_mili = (uint32_t)diff * 19580 / 42432 * 10;
+ if (diff >= 32024 || !start_mili) {
+ LOGP(DRR, LOGL_INFO, " -> Start time already "
+ "elapsed\n");
+ before_time = 0;
+ cda->start = 0;
+ } else {
+ LOGP(DRR, LOGL_INFO, " -> Start time is %d ms in the "
+ "future\n", start_mili);
+ }
+ }
+
+ /* check if channels are valid */
+ if (before_time) {
+ cause = gsm48_rr_render_ma(ms, cdb, ma, &ma_len);
+ if (cause)
+ return gsm48_rr_tx_hando_fail(ms, cause);
+ }
+ cause = gsm48_rr_render_ma(ms, cda, ma, &ma_len);
+ if (cause)
+ return gsm48_rr_tx_hando_fail(ms, cause);
+
+
+#if 0
+ if (not supported) {
+ LOGP(DRR, LOGL_NOTICE, "New channel is not supported.\n");
+ return GSM48_RR_CAUSE_CHAN_MODE_UNACCEPT;
+ }
+#endif
+
+#ifdef TEST_FREQUENCY_MOD
+ LOGP(DRR, LOGL_INFO, " TESTING: frequency modify HANDO.CMD\n");
+ before_time = 1;
+ memcpy(cdb, cda, sizeof(*cdb));
+ cdb->h = 0;
+ cdb->arfcn = 0;
+#endif
+
+ /* schedule start of handover */
+ rr->modify_state = GSM48_RR_MOD_HANDO;
+ if (!before_time && cda->start) {
+ start_rr_t_starting(rr, start_mili / 1000, start_mili % 1000);
+ /* when timer fires, start time is already elapsed */
+ cda->start = 0;
+
+ return 0;
+ }
+
+ /* if no starting time, start suspension of current link directly */
+ LOGP(DRR, LOGL_INFO, "request suspension of data link\n");
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return -ENOMEM;
+ gsm48_send_rsl(ms, RSL_MT_SUSP_REQ, nmsg);
+
+ return 0;
+}
+
+/* send all queued messages down to layer 2 */
+static int gsm48_rr_dequeue_down(struct osmocom_ms *ms)
+{
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
+ struct msgb *msg;
+
+ while((msg = msgb_dequeue(&rr->downqueue))) {
+ LOGP(DRR, LOGL_INFO, "Sending queued message.\n");
+ gsm48_send_rsl(ms, RSL_MT_DATA_REQ, msg);
+ }
+
+ return 0;
+}
+
+/* channel is resumed in dedicated mode */
+static int gsm48_rr_estab_cnf_dedicated(struct osmocom_ms *ms, struct msgb *msg)
+{
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
+
+ LOGP(DRR, LOGL_INFO, "data link is resumed\n");
+
+ switch (rr->modify_state) {
+ case GSM48_RR_MOD_ASSIGN:
+ gsm48_rr_tx_ass_cpl(ms, GSM48_RR_CAUSE_NORMAL);
+ break;
+ case GSM48_RR_MOD_HANDO:
+ gsm48_rr_tx_hando_cpl(ms, GSM48_RR_CAUSE_NORMAL);
+ break;
+ case GSM48_RR_MOD_ASSIGN_RESUME:
+ gsm48_rr_tx_ass_fail(ms, GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
+ break;
+ case GSM48_RR_MOD_HANDO_RESUME:
+ gsm48_rr_tx_hando_fail(ms, GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
+ break;
+ }
+
+ /* transmit queued frames during ho / ass transition */
+ gsm48_rr_dequeue_down(ms);
+
+ rr->modify_state = GSM48_RR_MOD_NONE;
+
+ return 0;
+}
+
+/* suspend confirm in dedicated mode */
+static int gsm48_rr_susp_cnf_dedicated(struct osmocom_ms *ms, struct msgb *msg)
+{
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
+
+ if (rr->modify_state) {
+ struct msgb *nmsg;
+ uint16_t ma[64];
+ uint8_t ma_len;
+
+ /* deactivating dedicated mode */
+ LOGP(DRR, LOGL_INFO, "suspension coplete, leaving dedicated "
+ "mode\n");
+ l1ctl_tx_dm_rel_req(ms);
+ l1ctl_tx_reset_req(ms, L1CTL_RES_T_SCHED);
+
+ /* store current channel descriptions */
+ memcpy(&rr->cd_last, &rr->cd_now, sizeof(rr->cd_last));
+
+ /* copy channel description "after time" */
+ memcpy(&rr->cd_now, &rr->cd_after, sizeof(rr->cd_now));
+
+ if (rr->cd_after.start) {
+ /* render channel "before time" */
+ gsm48_rr_render_ma(ms, &rr->cd_before, ma, &ma_len);
+
+ /* activate channel */
+ gsm48_rr_activate_channel(ms, &rr->cd_before, ma,
+ ma_len);
+
+ /* render channel "after time" */
+ gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
+
+ /* schedule change of channel */
+ gsm48_rr_channel_after_time(ms, &rr->cd_now, ma, ma_len,
+ rr->cd_now.start_tm.fn);
+ } else {
+ /* render channel "after time" */
+ gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
+
+ /* activate channel */
+ gsm48_rr_activate_channel(ms, &rr->cd_now, ma, ma_len);
+ }
+
+ /* send DL-RESUME REQUEST */
+ LOGP(DRR, LOGL_INFO, "request resume of data link\n");
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return -ENOMEM;
+ gsm48_send_rsl(ms, RSL_MT_RES_REQ, nmsg);
+
+#ifdef TODO
+ /* trigger RACH */
+ if (rr->modify_state == GSM48_RR_MOD_HANDO) {
+ gsm48_rr_tx_hando_access(ms);
+ rr->hando_acc_left = 3;
+ }
+#endif
+ }
+ return 0;
+}
+
+/*
+ * radio ressource requests
+ */
+
+/* establish request for dedicated mode */
+static int gsm48_rr_est_req(struct osmocom_ms *ms, struct msgb *msg)
+{
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
+ struct gsm322_cellsel *cs = &ms->cellsel;
+ struct gsm48_sysinfo *s = cs->si;
+ struct gsm_subscriber *subscr = &ms->subscr;
+ struct gsm48_rr_hdr *rrh = (struct gsm48_rr_hdr *) msg->data;
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ uint8_t cause;
+ struct msgb *nmsg;
struct gsm48_rr_hdr *nrrh;
uint16_t acc_class;
gsm48_apply_v_sd(rr, msg);
/* queue message, during handover or assignment procedure */
- if (rr->hando_susp_state || rr->assign_susp_state) {
+ if (rr->modify_state == GSM48_RR_MOD_ASSIGN
+ || rr->modify_state == GSM48_RR_MOD_HANDO) {
LOGP(DRR, LOGL_INFO, "Queueing message during suspend.\n");
msgb_enqueue(&rr->downqueue, msg);
return 0;
case GSM48_MT_RR_CHAN_MODE_MODIF:
rc = gsm48_rr_rx_chan_modify(ms, msg);
break;
-#if 0
case GSM48_MT_RR_HANDO_CMD:
rc = gsm48_rr_rx_hando_cmd(ms, msg);
break;
case GSM48_MT_RR_FREQ_REDEF:
- rc = gsm48_rr_rx_freq_redef(ms, msg);
+ rc = gsm48_rr_rx_frq_redef(ms, msg);
break;
-#endif
case GSM48_MT_RR_CHAN_REL:
rc = gsm48_rr_rx_chan_rel(ms, msg);
break;
+ case GSM48_MT_RR_APP_INFO:
+ LOGP(DRR, LOGL_NOTICE, "APP INFO not supported!\n");
+ break;
default:
LOGP(DRR, LOGL_NOTICE, "Message type 0x%02x unknown.\n",
gh->msg_type);
return 0;
}
+/* MDL-ERROR */
+static int gsm48_rr_mdl_error_ind(struct osmocom_ms *ms, struct msgb *msg)
+{
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
+ struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
+ struct msgb *nmsg;
+ struct gsm48_rr_hdr *nrrh;
+ uint8_t *mode;
+ uint8_t cause = rllh->data[2];
+ uint16_t ma[64];
+ uint8_t ma_len;
+
+ switch (cause) {
+ case RLL_CAUSE_SEQ_ERR:
+ case RLL_CAUSE_UNSOL_DM_RESP_MF:
+ break;
+ default:
+ LOGP(DRR, LOGL_NOTICE, "MDL-Error (cause %d) ignoring\n",
+ cause);
+ }
+
+ LOGP(DRR, LOGL_NOTICE, "MDL-Error (cause %d) aborting\n", cause);
+
+ /* disconnect the main signalling link */
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return -ENOMEM;
+ mode = msgb_put(nmsg, 2);
+ mode[0] = RSL_IE_RELEASE_MODE;
+ mode[1] = 1; /* local release */
+ gsm48_send_rsl_rel(ms, RSL_MT_REL_REQ, nmsg);
+
+ /* deactivate channel */
+ l1ctl_tx_dm_rel_req(ms);
+ l1ctl_tx_reset_req(ms, L1CTL_RES_T_SCHED);
+
+ switch (rr->modify_state) {
+ case GSM48_RR_MOD_ASSIGN:
+ case GSM48_RR_MOD_HANDO:
+ if (rr->modify_state == GSM48_RR_MOD_ASSIGN)
+ rr->modify_state = GSM48_RR_MOD_ASSIGN_RESUME;
+ else
+ rr->modify_state = GSM48_RR_MOD_HANDO_RESUME;
+
+ /* get old channel description */
+ memcpy(&rr->cd_now, &rr->cd_last, sizeof(rr->cd_now));
+
+ /* render and change radio to old channel */
+ gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
+ gsm48_rr_activate_channel(ms, &rr->cd_now, ma, ma_len);
+
+ /* re-establish old link */
+ nmsg = gsm48_l3_msgb_alloc();
+ if (!nmsg)
+ return -ENOMEM;
+ return gsm48_send_rsl(ms, RSL_MT_RECON_REQ, nmsg);
+ case GSM48_RR_MOD_ASSIGN_RESUME:
+ case GSM48_RR_MOD_HANDO_RESUME:
+ rr->modify_state = GSM48_RR_MOD_NONE;
+ break;
+ }
+
+ /* send abort ind to upper layer */
+ nmsg = gsm48_rr_msgb_alloc(GSM48_RR_ABORT_IND);
+ if (!nmsg)
+ return -ENOMEM;
+ nrrh = (struct gsm48_rr_hdr *)nmsg->data;
+ nrrh->cause = RR_REL_CAUSE_LINK_FAILURE;
+ gsm48_rr_upmsg(ms, nmsg);
+
+ /* return idle */
+ new_rr_state(rr, GSM48_RR_ST_IDLE);
+ return 0;
+}
+
/*
* state machines
*/
#if 0
{SBIT(GSM48_RR_ST_DEDICATED),
RSL_MT_CHAN_CNF, gsm48_rr_rand_acc_cnf_dedicated},
-
- {SBIT(GSM_RRSTATE),
- RSL_MT_MDL_ERROR_IND, gsm48_rr_mdl_error_ind},
#endif
+
+ {SBIT(GSM48_RR_ST_DEDICATED),
+ RSL_MT_ERROR_IND, gsm48_rr_mdl_error_ind},
};
#define DLDATASLLEN \
{SBIT(GSM48_RR_ST_CONN_PEND) |
SBIT(GSM48_RR_ST_DEDICATED), /* 3.4.13.3 */
GSM48_RR_ABORT_REQ, gsm48_rr_abort_req},
-
-#if 0
- {SBIT(GSM48_RR_ST_DEDICATED),
- GSM48_RR_ACT_REQ, gsm48_rr_act_req},
-#endif
};
#define RRDOWNSLLEN \
}
stop_rr_t_monitor(rr);
+ stop_rr_t_starting(rr);
stop_rr_t_rel_wait(rr);
stop_rr_t3110(rr);
stop_rr_t3122(rr);
+ stop_rr_t3124(rr);
stop_rr_t3126(rr);
return 0;
todo rr_sync_ind when receiving ciph, re ass, channel mode modify
-/* decode "Cell Description" (10.5.2.2) */
-static int gsm48_decode_cell_desc(struct gsm48_cell_desc *cd, uint16_t *arfcn, uint8_t *ncc uint8_t *bcc)
-{
- *arfcn = (cd->bcch_hi << 8) + cd->bcch_lo;
- *ncc = cd->ncc;
- *bcc = cd->bcc;
-}
-
-/* decode "Synchronization Indication" (10.5.2.39) */
-static int gsm48_decode_sync_ind(struct gsm48_rrlayer *rr, struct gsm48_rr_sync_ind *si)
-{
- rr->ho_sync_ind = si->si;
- rr->ho_rot = si->rot;
- rr->ho_nci = si->nci;
-}
-
-/* receiving HANDOVER COMMAND message (9.1.15) */
-static int gsm48_rr_rx_hando_cmd(struct osmocom_ms *ms, struct msgb *msg)
-{
- struct gsm48_rrlayer *rr = ms->rrlayer;
- struct gsm48_hdr *gh = msgb_l3(msg);
- struct gsm48_ho_cmd *ho = (struct gsm48_ho_cmd *)gh->data;
- int payload_len = msgb_l3len(msg) - sizeof(*gh) - wirklich sizeof(*ho);
- struct tlv_parsed tp;
- struct gsm48_rr_cd cd;
- struct msgb *nmsg;
-
- memset(&cd, 0, sizeof(cd));
-
- if (payload_len < 0) {
- LOGP(DRR, LOGL_NOTICE, "Short read of HANDOVER COMMAND message.\n");
- return gsm48_rr_tx_rr_status(ms, GSM48_RR_CAUSE_PROT_ERROR_UNSPC);
- }
- tlv_parse(&tp, &gsm48_rr_att_tlvdef, ho->data, payload_len, 0, 0);
-
-TODO
-
- /* start suspension of current link */
- nmsg = gsm48_l3_msgb_alloc();
- if (!nmsg)
- return -ENOMEM;
- gsm48_send_rsl(ms, RSL_MT_SUSP_REQ, nmsg);
-
- /* change into special handover suspension state */
- rr->hando_susp_state = 1;
- rr->resume_last_state = 0;
-
- return 0;
-}
-
-static int gsm48_rr_mdl_error_ind(struct osmocom_ms *ms, struct msgb *msg)
-{
- struct gsm48_rrlayer *rr = ms->rrlayer;
- struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
- struct msgb *nmsg;
- uint8_t cause = rllh->data[2];
-
- printing of the cause
-
- switch (cause) {
- case RLL_CAUSE_SEQ_ERR:
- case RLL_CAUSE_UNSOL_DM_RESP_MF:
- einige muessen ignoriert werden
- andere gelten als release
- }
-
- if (rr->hando_susp_state || rr->assign_susp_state) {
- if (!rr->resume_last_state) {
- uint16_t ma[64];
- uint8_t ma_len;
-
- rr->resume_last_state = 1;
-
- /* get old channel description */
- memcpy(&rr->cd_now, &rr->chan_last, sizeof(rr->cd_now));
-
- /* render and change radio to old channel */
- gsm48_rr_render_ma(ms, &rr->cd_now, ma, &ma_len);
- gsm48_rr_activate_channel(ms, &rr->cd_now, ma, ma_len);
-
- /* re-establish old link */
- nmsg = gsm48_l3_msgb_alloc();
- if (!nmsg)
- return -ENOMEM;
- return gsm48_send_rsl(ms, RSL_MT_RECON_REQ, nmsg);
- }
- rr->resume_last_state = 0;
- }
-
- /* deactivate channel */
- l1ctl_tx_dm_rel_req(ms, arfcn, rr->chan_desc.chan_desc.chan_nr);
-
- /* send abort ind to upper layer */
- nmsg = gsm48_mm_msgb_alloc();
-
- if (!msg)
- return -ENOMEM;
- nrrh = (struct gsm_mm_hdr *)nmsg->data;
- nrrh->msg_type = RR_ABORT_IND;
- nrrh->cause = GSM_MM_CAUSE_LINK_FAILURE;
- return gsm48_rr_upmsg(ms, msg);
-}
-
static void timeout_rr_t3124(void *arg)
{
struct gsm48_rrlayer *rr = arg;
hando_acc_left = 0;
/* get old channel description */
- memcpy(&rr->chan_desc, &rr->chan_last, sizeof(*cd));
+ memcpy(&rr->chan_desc, &rr->chan_last, sizeof(rr->chan_desc));
/* change radio to old channel */
tx_ph_dm_est_req(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr,
struct msgb *nmsg;
int s;
- if (!rr->hando_susp_state) {
+ if (rr->modify_state != GSM48_RR_MOD_HANDO) {
LOGP(DRR, LOGL_NOTICE, "Random acces confirm, but not in handover state.\n");
return 0;
}
projects / osmocom-bb.git / blobdiff