/**
* @brief Handler for received L1CTL_DM_EST_REQ from L23.
*
* -- dedicated mode established request --
*
* @param [in] msg the received message.
*
* Handle state change from idle to dedicated mode.
*
*/
void l1ctl_rx_dm_est_req(struct l1_model_ms *ms, struct msgb *msg)
{
struct l1ctl_hdr *l1h = (struct l1ctl_hdr *) msg->data;
struct l1ctl_info_ul *ul = (struct l1ctl_info_ul *) l1h->data;
struct l1ctl_dm_est_req *est_req = (struct l1ctl_dm_est_req *) ul->payload;
uint8_t rsl_chantype, subslot, timeslot;
rsl_dec_chan_nr(ul->chan_nr, &rsl_chantype, &subslot, ×lot);
LOGPMS(DL1C, LOGL_INFO, ms, "Rx L1CTL_DM_EST_REQ (chan_nr=0x%02x, tn=%u, ss=%u)\n",
ul->chan_nr, timeslot, subslot);
ms->state.dedicated.chan_type = rsl_chantype;
ms->state.dedicated.tn = timeslot;
ms->state.dedicated.subslot = subslot;
ms->state.state = MS_STATE_DEDICATED;
/* TCH config */
if (rsl_chantype == RSL_CHAN_Bm_ACCHs || rsl_chantype == RSL_CHAN_Lm_ACCHs) {
ms->state.tch_mode = est_req->tch_mode;
l1_model_tch_mode_set(ms, est_req->tch_mode);
ms->state.audio_mode = est_req->audio_mode;
/* TODO: configure audio hardware for encoding /
* decoding / recording / playing voice */
}
}
int process_handle_burst(struct session_info *s, struct l1ctl_burst_ind *bi)
{
int ul;
//int len;
//uint32_t fn;
uint8_t type, subch, ts;
struct burst_buf *bb = 0;
rsl_dec_chan_nr(bi->chan_nr, &type, &subch, &ts);
//fn = ntohl(bi->frame_nr);
ul = !!(ntohs(bi->band_arfcn) & ARFCN_UPLINK);
//printf("fn %d ts %d ul %d snr %d ", fn, ts, ul, bi->snr);
//printf(" sub %d\n", chan_detect(fn, ts, comb, &sub), sub);
switch (type) {
case RSL_CHAN_Lm_ACCHs:
// interleaved user data and signalling
break;
case RSL_CHAN_Bm_ACCHs:
if (bi->flags & BI_FLG_SACCH) {
/* burst is SACCH/T */
process_ccch(s, &s->saccht[ul], bi);
} else {
//FIXME: detect type of channel
/* try TCH (FACCH) */
//len = process_tch(s, bi, msg);
/* try PDCH */
//len = process_pdch(s, bi, msg);
}
break;
case RSL_CHAN_BCCH:
//FIXME: check fn to know which type it really is
case RSL_CHAN_SDCCH4_ACCH:
//FIXME: check fn to know which type it really is
case RSL_CHAN_SDCCH8_ACCH:
//FIXME: check fn to know which type it really is
if (bi->flags & BI_FLG_SACCH) {
bb = &s->sacch;
} else {
bb = &s->sdcch;
}
process_ccch(s, bb, bi);
break;
case RSL_CHAN_RACH:
case RSL_CHAN_PCH_AGCH:
default:
printf("Type not handled! %.02x\n", type);
}
return 0;
}
static int unit_data_ind(struct osmocom_ms *ms, struct msgb *msg)
{
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
struct tlv_parsed tv;
uint8_t ch_type, ch_subch, ch_ts;
DEBUGP(DRSL, "RSLms UNIT DATA IND chan_nr=0x%02x link_id=0x%02x\n",
rllh->chan_nr, rllh->link_id);
rsl_tlv_parse(&tv, rllh->data, msgb_l2len(msg)-sizeof(*rllh));
if (!TLVP_PRESENT(&tv, RSL_IE_L3_INFO)) {
DEBUGP(DRSL, "UNIT_DATA_IND without L3 INFO ?!?\n");
return -EIO;
}
msg->l3h = (uint8_t *) TLVP_VAL(&tv, RSL_IE_L3_INFO);
if (state != SCAN_STATE_READ && state != SCAN_STATE_RACH) {
return -EINVAL;
}
rsl_dec_chan_nr(rllh->chan_nr, &ch_type, &ch_subch, &ch_ts);
switch (ch_type) {
case RSL_CHAN_PCH_AGCH:
return pch_agch(ms, msg);
case RSL_CHAN_BCCH:
return bcch(ms, msg);
#if 0
case RSL_CHAN_Bm_ACCHs:
case RSL_CHAN_Lm_ACCHs:
case RSL_CHAN_SDCCH4_ACCH:
case RSL_CHAN_SDCCH8_ACCH:
return rx_acch(ms, msg);
#endif
default:
LOGP(DRSL, LOGL_NOTICE, "RSL with chan_nr 0x%02x unknown.\n",
rllh->chan_nr);
return -EINVAL;
}
}
static int unit_data_ind(struct osmocom_ms *ms, struct msgb *msg)
{
struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
struct tlv_parsed tv;
uint8_t ch_type, ch_subch, ch_ts;
DEBUGP(DRSL, "RSLms UNIT DATA IND chan_nr=0x%02x link_id=0x%02x\n",
rllh->chan_nr, rllh->link_id);
rsl_tlv_parse(&tv, rllh->data, msgb_l2len(msg)-sizeof(*rllh));
if (!TLVP_PRESENT(&tv, RSL_IE_L3_INFO)) {
DEBUGP(DRSL, "UNIT_DATA_IND without L3 INFO ?!?\n");
return -EIO;
}
msg->l3h = (uint8_t *) TLVP_VAL(&tv, RSL_IE_L3_INFO);
rsl_dec_chan_nr(rllh->chan_nr, &ch_type, &ch_subch, &ch_ts);
switch (ch_type) {
case RSL_CHAN_BCCH:
return bcch(ms, msg);
default:
return 0;
}
}
/**
* This method used to send a l1ctl_tx_dm_est_req_h0 or
* a l1ctl_tx_dm_est_req_h1 to the layer1 to follow this
* assignment. The code has been removed.
*/
static int gsm48_rx_imm_ass(struct msgb *msg, struct osmocom_ms *ms)
{
struct gsm48_imm_ass *ia = msgb_l3(msg);
uint8_t ch_type, ch_subch, ch_ts;
int rv;
/* Discard packet TBF assignement */
if (ia->page_mode & 0xf0)
return 0;
/* If we're not ready yet, or just busy ... */
if ((!app_state.has_si1) || (app_state.dch_state != DCH_NONE))
return 0;
rsl_dec_chan_nr(ia->chan_desc.chan_nr, &ch_type, &ch_subch, &ch_ts);
if (!ia->chan_desc.h0.h) {
/* Non-hopping */
uint16_t arfcn;
arfcn = ia->chan_desc.h0.arfcn_low | (ia->chan_desc.h0.arfcn_high << 8);
LOGP(DRR, LOGL_NOTICE, "GSM48 IMM ASS (ra=0x%02x, chan_nr=0x%02x, "
"ARFCN=%u, TS=%u, SS=%u, TSC=%u) ", ia->req_ref.ra,
ia->chan_desc.chan_nr, arfcn, ch_ts, ch_subch,
ia->chan_desc.h0.tsc);
/* request L1 to go to dedicated mode on assigned channel */
rv = l1ctl_tx_dm_est_req_h0(ms,
arfcn, ia->chan_desc.chan_nr, ia->chan_desc.h0.tsc,
GSM48_CMODE_SIGN, 0);
} else {
/* Hopping */
uint8_t maio, hsn, ma_len;
uint16_t ma[64], arfcn;
int i, j, k;
hsn = ia->chan_desc.h1.hsn;
maio = ia->chan_desc.h1.maio_low | (ia->chan_desc.h1.maio_high << 2);
LOGP(DRR, LOGL_NOTICE, "GSM48 IMM ASS (ra=0x%02x, chan_nr=0x%02x, "
"HSN=%u, MAIO=%u, TS=%u, SS=%u, TSC=%u) ", ia->req_ref.ra,
ia->chan_desc.chan_nr, hsn, maio, ch_ts, ch_subch,
ia->chan_desc.h1.tsc);
/* decode mobile allocation */
ma_len = 0;
for (i=1, j=0; i<=1024; i++) {
arfcn = i & 1023;
if (app_state.cell_arfcns[arfcn].mask & 0x01) {
k = ia->mob_alloc_len - (j>>3) - 1;
if (ia->mob_alloc[k] & (1 << (j&7))) {
ma[ma_len++] = arfcn;
}
j++;
}
}
/* request L1 to go to dedicated mode on assigned channel */
rv = l1ctl_tx_dm_est_req_h1(ms,
maio, hsn, ma, ma_len,
ia->chan_desc.chan_nr, ia->chan_desc.h1.tsc,
GSM48_CMODE_SIGN, 0);
}
/**
* @brief Get the scheduled fn for a msg depending on its chan_nr and link_id.
*/
uint32_t sched_fn_ul(struct gsm_time cur_time, uint8_t chan_nr, uint8_t link_id)
{
uint8_t chan_type, chan_ss, chan_ts;
uint32_t sched_fn = cur_time.fn;
uint16_t mod_102 = cur_time.fn % 2 * 51;
rsl_dec_chan_nr(chan_nr, &chan_type, &chan_ss, &chan_ts);
/* TODO: Replace this spaghetti monster with some lookup table */
switch (chan_type) {
case RSL_CHAN_Bm_ACCHs:
switch (link_id) {
case LID_DEDIC:
/* dl=[0...11,13...24] ul=[0...11,13...24]
* skip idle frames and frames reserved for TCH_ACCH */
if (cur_time.t2 == 12 || cur_time.t2 == 25)
sched_fn++;
break;
/* dl=42, ul=42+15 */
case LID_SACCH:
if ((chan_ts & 1)) {
/* Odd traffic channel timeslot -> dl=[25] ul=[25]
* TCH_ACCH always at the end of tch multiframe (mod 26) */
sched_fn -= cur_time.t2;
sched_fn += 25;
} else {
/* Even traffic channel timeslot -> dl=[12] ul=[12] */
if (cur_time.t2 <= 12) {
sched_fn -= cur_time.t2;
sched_fn += 12;
} else {
sched_fn -= cur_time.t2;
sched_fn += 26 + 12;
}
}
break;
}
break;
case RSL_CHAN_Lm_ACCHs:
break; /* TCH/H not supported */
case RSL_CHAN_SDCCH4_ACCH:
switch (chan_ss) {
case 0:
switch (link_id) {
/* dl=22, ul=22+15 */
case LID_DEDIC:
if (cur_time.t3 <= 22 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 22 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 22 + 15;
}
break;
/* dl=42, ul=42+15 */
case LID_SACCH:
if (mod_102 <= 42 + 15) {
sched_fn -= mod_102;
sched_fn += 42 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 42 + 15;
}
break;
}
break;
case 1:
switch (link_id) {
/* dl=26, ul=26+15 */
case LID_DEDIC:
if (cur_time.t3 <= 26 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 26 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 26 + 15;
}
break;
/* dl=46, ul=46+15 */
case LID_SACCH:
if (mod_102 <= 46 + 15) {
sched_fn -= mod_102;
sched_fn += 46 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 46 + 15;
}
break;
}
break;
case 2:
switch (link_id) {
/* dl=32, ul=32+15 */
case LID_DEDIC:
if (cur_time.t3 <= 32 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 32 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 32 + 15;
}
break;
/* dl=51+42, ul=51+42+15 */
case LID_SACCH:
if (mod_102 <= 51 + 42 + 15) {
sched_fn -= mod_102;
sched_fn += 51 + 42 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 51 + 42 + 15;
}
break;
}
break;
case 3:
switch (link_id) {
/* dl=36, ul=36+15 */
case LID_DEDIC:
if (cur_time.t3 <= 36 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 36 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 36 + 15;
}
break;
/* dl=51+46, ul=51+46+15 */
case LID_SACCH:
if (mod_102 <= 51 + 46 + 15) {
sched_fn -= mod_102;
sched_fn += 51 + 46 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 51 + 46 + 15;
}
break;
}
break;
}
break;
case RSL_CHAN_SDCCH8_ACCH:
switch (chan_ss) {
case 0:
switch (link_id) {
/* dl=0, ul=0+15 */
case LID_DEDIC:
if (cur_time.t3 <= 0 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 0 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 0 + 15;
}
break;
/* dl=32, ul=32+15 */
case LID_SACCH:
if (mod_102 <= 32 + 15) {
sched_fn -= mod_102;
sched_fn += 32 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 32 + 15;
}
break;
}
break;
case 1:
switch (link_id) {
/* dl=4, ul=4+15 */
case LID_DEDIC:
if (cur_time.t3 <= 4 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 4 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 4 + 15;
}
break;
/* dl=36, ul=36+15 */
case LID_SACCH:
if (mod_102 <= 36 + 15) {
sched_fn -= mod_102;
sched_fn += 36 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 36 + 15;
}
break;
}
break;
case 2:
switch (link_id) {
/* dl=8, ul=8+15 */
case LID_DEDIC:
if (cur_time.t3 <= 8 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 8 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 8 + 15;
}
break;
/* dl=40, ul=40+15 */
case LID_SACCH:
if (mod_102 <= 40 + 15) {
sched_fn -= mod_102;
sched_fn += 40 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 40 + 15;
}
break;
}
break;
case 3:
switch (link_id) {
/* dl=12, ul=12+15 */
case LID_DEDIC:
if (cur_time.t3 <= 12 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 12 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 12 + 15;
}
break;
/* dl=44, ul=44+15 */
case LID_SACCH:
if (mod_102 <= 44 + 15) {
sched_fn -= mod_102;
sched_fn += 44 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 44 + 15;
}
break;
}
break;
case 4:
switch (link_id) {
/* dl=16, ul=16+15 */
case LID_DEDIC:
if (cur_time.t3 <= 16 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 16 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 16 + 15;
}
break;
/* dl=51+32, ul=51+32+15 */
case LID_SACCH:
if (mod_102 <= 51 + 32 + 15) {
sched_fn -= mod_102;
sched_fn += 51 + 32 + 15;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 51 + 32 + 15;
}
break;
}
break;
case 5:
switch (link_id) {
/* dl=20, ul=36+15 */
case LID_DEDIC:
if (cur_time.t3 <= 20 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 20 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 20 + 15;
}
break;
/* dl=51+36, ul=51+36+15 ==> 0 */
case LID_SACCH:
if (mod_102 <= 0) {
sched_fn -= mod_102;
sched_fn += 0;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 0;
}
break;
}
break;
case 6:
switch (link_id) {
/* dl=24, ul=24+15 */
case LID_DEDIC:
if (cur_time.t3 <= 24 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 24 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 24 + 15;
}
break;
/* dl=51+40, ul=51+40+15 ==> 4 */
case LID_SACCH:
if (mod_102 <= 4) {
sched_fn -= mod_102;
sched_fn += 4;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 4;
}
break;
}
break;
case 7:
switch (link_id) {
/* dl=28, ul=28+15 */
case LID_DEDIC:
if (cur_time.t3 <= 28 + 15) {
sched_fn -= cur_time.t3;
sched_fn += 28 + 15;
} else {
sched_fn -= cur_time.t3;
sched_fn += 51 + 28 + 15;
}
break;
/* dl=51+44, ul=51+44+15 ==> 8 */
case LID_SACCH:
if (mod_102 <= 8) {
sched_fn -= mod_102;
sched_fn += 8;
} else {
sched_fn -= mod_102;
sched_fn += 2 * 51 + 8;
}
break;
}
break;
}
break;
case RSL_CHAN_RACH:
break; /* Use virt_prim_rach.c for calculation of sched fn for rach */
default:
break; /* Use current fn as default */
}
return sched_fn;
}
void parse_assignment(struct gsm48_hdr *hdr, unsigned len, struct gsm_sysinfo_freq *cell_arfcns, struct gsm_assignment *ga)
{
struct gsm48_ass_cmd *ac;
struct gsm48_ho_cmd *hoc;
struct gsm48_chan_desc *cd = NULL;
int payload_len = 0;
uint8_t *payload_data = NULL;
struct tlv_parsed tp;
uint8_t *ma = 0;
uint8_t ma_len;
uint8_t ch_type, ch_subch, ch_ts;
unsigned i, mask;
if (!ga)
return;
memset(ga, 0, sizeof(*ga));
/* handover */
if (hdr->msg_type == 0x2b) {
if (len < (sizeof(*hdr) + sizeof(*hoc))) {
return;
}
hoc = (struct gsm48_ho_cmd *) hdr->data;
cd = &hoc->chan_desc;
payload_len = len - sizeof(*hdr) - sizeof(*hoc);
payload_data = hoc->data;
ga->bcch_arfcn = hoc->cell_desc.arfcn_lo;
ga->bcch_arfcn |= (hoc->cell_desc.arfcn_hi << 8);
}
/* assignment */
if (hdr->msg_type == 0x2e) {
if (len < (sizeof(*hdr) + sizeof(*ac))) {
return;
}
ac = (struct gsm48_ass_cmd *) hdr->data;
cd = &ac->chan_desc;
payload_len = len - sizeof(*hdr) - sizeof(*ac);
payload_data = ac->data;
}
if (!cd)
return;
if (!payload_len)
return;
/* Parse TLV in the message */
tlv_parse(&tp, &gsm48_rr_att_tlvdef, payload_data, payload_len, 0, 0);
ma_len = 0;
ma = NULL;
mask = 0;
/* Cell channel description */
if (TLVP_PRESENT(&tp, GSM48_IE_CELL_CH_DESC)) {
const uint8_t *v = TLVP_VAL(&tp, GSM48_IE_CELL_CH_DESC);
uint8_t len = TLVP_LEN(&tp, GSM48_IE_CELL_CH_DESC);
gsm48_decode_freq_list(cell_arfcns, (uint8_t *) v, len, 0xff, 0x02);
mask = 0x02;
} else if (TLVP_PRESENT(&tp, GSM48_IE_MA_AFTER)) {
/* Mobile allocation */
const uint8_t *v = TLVP_VAL(&tp, GSM48_IE_MA_AFTER);
uint8_t len = TLVP_LEN(&tp, GSM48_IE_MA_AFTER);
ma_len = len;
ma = (uint8_t *) v;
mask = 0x01;
} else if (TLVP_PRESENT(&tp, GSM48_IE_FREQ_L_AFTER)) {
/* Frequency list after time */
const uint8_t *v = TLVP_VAL(&tp, GSM48_IE_FREQ_L_AFTER);
uint8_t len = TLVP_LEN(&tp, GSM48_IE_FREQ_L_AFTER);
gsm48_decode_freq_list(cell_arfcns, (uint8_t *) v, len, 0xff, 0x04);
ma_len = 0;
ma = NULL;
mask = 0x04;
} else {
/* Use the old one */
for (i=0; i<1024; i++) {
cell_arfcns[i].mask &= ~0x02;
if (cell_arfcns[i].mask & 0x01) {
cell_arfcns[i].mask |= 0x02;
mask = 0x02;
}
}
}
/* Channel mode (HR/FR/EFR/AMR) */
if (TLVP_PRESENT(&tp, GSM48_IE_CHANMODE_1)) {
const uint8_t *v = TLVP_VAL(&tp, GSM48_IE_CHANMODE_1);
//uint8_t len = TLVP_LEN(&tp, GSM48_IE_CHANMODE_1);
ga->chan_mode = v[0];
}
/* Multirate configuration */
if (TLVP_PRESENT(&tp, GSM48_IE_MUL_RATE_CFG)) {
const uint8_t *v = TLVP_VAL(&tp, GSM48_IE_MUL_RATE_CFG);
//uint8_t len = TLVP_LEN(&tp, GSM48_IE_MUL_RATE_CFG);
ga->rate_conf = v[1];
}
rsl_dec_chan_nr(cd->chan_nr, &ch_type, &ch_subch, &ch_ts);
ga->h = cd->h0.h;
ga->chan_nr = cd->chan_nr;
if (!ga->h) {
/* Non-Hopping */
uint16_t arfcn = cd->h0.arfcn_low | (cd->h0.arfcn_high << 8);
ga->tsc = cd->h0.tsc;
ga->h0.band_arfcn = arfcn;
} else {
/* Hopping */
uint16_t arfcn;
int i, j, k;
ga->tsc = cd->h1.tsc;
ga->h1.maio = cd->h1.maio_low | (cd->h1.maio_high << 2);;
ga->h1.hsn = cd->h1.hsn;
ga->h1.ma_len = 0;
/* decode mobile allocation */
if (ma) {
if (ma_len == 0) {
return;
}
for (i=1, j=0; i<=1024; i++) {
arfcn = i & 1023;
if (cell_arfcns[arfcn].mask & mask) {
k = ma_len - (j>>3) - 1;
if (ma[k] & (1 << (j&7))) {
ga->h1.ma[ga->h1.ma_len++] = arfcn;
}
j++;
}
}
if (ga->h1.ma_len == 0) {
/* cell information not found */
/* just compute ma_len */
for (i=0; i<(ma_len*8); i++){
int k = i/8;
if (ma[k] & (1 << (i&7))) {
ga->h1.ma_len++;
}
}
}
} else {
for (i=1; i<=1024; i++) {
static int gsm48_rx_imm_ass(struct msgb *msg, struct osmocom_ms *ms)
{
struct gsm48_imm_ass *ia = msgb_l3(msg);
uint8_t ch_type, ch_subch, ch_ts;
int rv;
/* Discard packet TBF assignement */
if (ia->page_mode & 0xf0)
return 0;
/* FIXME: compare RA and GSM time with when we sent RACH req */
rsl_dec_chan_nr(ia->chan_desc.chan_nr, &ch_type, &ch_subch, &ch_ts);
if (!ia->chan_desc.h0.h) {
/* Non-hopping */
uint16_t arfcn;
arfcn = ia->chan_desc.h0.arfcn_low | (ia->chan_desc.h0.arfcn_high << 8);
DEBUGP(DRR, "GSM48 IMM ASS (ra=0x%02x, chan_nr=0x%02x, "
"ARFCN=%u, TS=%u, SS=%u, TSC=%u) ", ia->req_ref.ra,
ia->chan_desc.chan_nr, arfcn, ch_ts, ch_subch,
ia->chan_desc.h0.tsc);
if (ch_ts >= 4) {
DEBUGPC(DRR, "UNSUPPORTED!\n");
return 0;
}
/* request L1 to go to dedicated mode on assigned channel */
rv = l1ctl_tx_dm_est_req_h0(ms,
arfcn, ia->chan_desc.chan_nr, ia->chan_desc.h0.tsc);
} else {
/* Hopping */
uint8_t maio, hsn, ma_len;
uint16_t ma[64], arfcn;
int i, j, k;
hsn = ia->chan_desc.h1.hsn;
maio = ia->chan_desc.h1.maio_low | (ia->chan_desc.h1.maio_high << 2);
DEBUGP(DRR, "GSM48 IMM ASS (ra=0x%02x, chan_nr=0x%02x, "
"HSN=%u, MAIO=%u, TS=%u, SS=%u, TSC=%u) ", ia->req_ref.ra,
ia->chan_desc.chan_nr, hsn, maio, ch_ts, ch_subch,
ia->chan_desc.h1.tsc);
/* decode mobile allocation */
ma_len = 0;
for (i=1, j=0; i<=1024; i++) {
arfcn = i & 1023;
if (app_state.cell_arfcns[arfcn].mask & 0x01) {
k = ia->mob_alloc_len - (j>>3) - 1;
if (ia->mob_alloc[k] & (1 << (j&7))) {
ma[ma_len++] = arfcn;
}
j++;
}
}
if (ch_ts >= 4) {
DEBUGPC(DRR, "UNSUPPORTED!\n");
return 0;
}
/* request L1 to go to dedicated mode on assigned channel */
rv = l1ctl_tx_dm_est_req_h1(ms,
maio, hsn, ma, ma_len,
ia->chan_desc.chan_nr, ia->chan_desc.h1.tsc);
}