static int try_cbch(struct osmocom_ms *ms, struct gsm48_sysinfo *s)
{
if (!s->si1 || !s->si4)
return 0;
if (!s->chan_nr) {
LOGP(DRR, LOGL_INFO, "no CBCH chan_nr found\n");
return 0;
}
if (s->h) {
LOGP(DRR, LOGL_INFO, "chan_nr = 0x%02x TSC = %d MAIO = %d "
"HSN = %d hseq (%d): %s\n",
s->chan_nr, s->tsc, s->maio, s->hsn,
s->hopp_len,
osmo_hexdump((unsigned char *) s->hopping, s->hopp_len * 2));
return l1ctl_tx_dm_est_req_h1(ms,
s->maio, s->hsn, s->hopping, s->hopp_len,
s->chan_nr, s->tsc,
GSM48_CMODE_SIGN, 0);
} else {
LOGP(DRR, LOGL_INFO, "chan_nr = 0x%02x TSC = %d ARFCN = %d\n",
s->chan_nr, s->tsc, s->arfcn);
return l1ctl_tx_dm_est_req_h0(ms, s->arfcn,
s->chan_nr, s->tsc, GSM48_CMODE_SIGN, 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);
}
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);
}
