#include <osmocom/l1l2_interface.h>
#include <osmocom/logging.h>
#include <osmocom/networks.h>
+#include <osmocom/l1ctl.h>
static int gsm48_rcv_rsl(struct osmocom_ms *ms, struct msgb *msg);
static int gsm48_rr_dl_est(struct osmocom_ms *ms);
if (state == GSM48_RR_ST_IDLE) {
struct msgb *msg, *nmsg;
+ /* release dedicated mode, if any */
+// tx_ph_dm_rel_req(rr->ms);
+ l1ctl_tx_reset_req(rr->ms, L1CTL_RES_T_FULL);
/* free establish message, if any */
rr->rr_est_req = 0;
if (rr->rr_est_msg) {
/* TODO: turn this into a channel activation timeout, later */
#define RSL_MT_CHAN_CNF 0x19
#include <osmocom/l1ctl.h>
-static void temp_rach_to(void *arg)
+int gsm48_rr_rach_conf(struct osmocom_ms *ms, uint32_t fn)
{
- struct gsm48_rrlayer *rr = arg;
- struct osmocom_ms *ms = rr->ms;
+ struct gsm48_rrlayer *rr = &ms->rrlayer;
struct msgb *msg = msgb_alloc_headroom(23+10, 10, "LAPDm RR");
- struct abis_rsl_rll_hdr *rllh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rllh));
+ struct abis_rsl_rll_hdr *rllh =
+ (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rllh));
+
+ if (!rr->wait_assign) {
+ LOGP(DRR, LOGL_INFO, "RACH confirm ignored, not waiting for "
+ "assignment.\n");
+ return 0;
+ }
+ LOGP(DRR, LOGL_INFO, "RACH confirm framenr=%u\n", fn);
+ rr->cr_hist[0].valid = 2;
+ rr->cr_hist[0].fn = fn;
rllh->c.msg_type = RSL_MT_CHAN_CNF;
msg->l2h = (unsigned char *)rllh;
gsm48_rcv_rsl(ms, msg);
- return;
+ return 0;
}
/* start random access */
return -EINVAL;
}
-// TODO: turn this into the channel activation timer
- rr->temp_rach_ti.cb = temp_rach_to;
- rr->temp_rach_ti.data = rr;
- bsc_schedule_timer(&rr->temp_rach_ti, ms->support.sync_to, 0);
-
/* store value, mask and history */
rr->chan_req_val = chan_req_val;
rr->chan_req_mask = chan_req_mask;
- rr->cr_hist[2] = -1;
- rr->cr_hist[1] = -1;
- rr->cr_hist[0] = -1;
+ rr->cr_hist[2].valid = 0;
+ rr->cr_hist[1].valid = 0;
+ rr->cr_hist[0].valid = 0;
/* if channel is already active somehow */
if (cs->ccch_state == GSM322_CCCH_ST_DATA)
slots = 55;
else
slots = 41;
+ break;
case 4: case 9: case 16:
if (s->ccch_conf != 1)
slots = 76;
else
slots = 52;
+ break;
case 5: case 10: case 20:
if (s->ccch_conf != 1)
slots = 109;
else
slots = 58;
+ break;
case 6: case 11: case 25:
if (s->ccch_conf != 1)
slots = 163;
else
slots = 86;
+ break;
default:
if (s->ccch_conf != 1)
slots = 217;
else
slots = 115;
+ break;
}
}
chan_req &= rr->chan_req_mask;
chan_req |= rr->chan_req_val;
nra->ra = chan_req;
-#ifdef TODO
- at this point we require chan req to be sent at a given delay
- also we require a confirm from radio part
- nra->delay = (random() % s->tx_integer) + slots;
-
- LOGP(DRR, LOGL_INFO, "RANDOM ACCESS (ra 0x%02x delay %d)\n", nra->ra,
- nra->delay);
-#else
- rr->temp_rach_ti.cb = temp_rach_to;
- rr->temp_rach_ti.data = rr;
- bsc_schedule_timer(&rr->temp_rach_ti, 0, 900000);
+#warning TODO
+ nra->mf_off = 1; // (random() % s->tx_integer) + slots;
+ nra->fn51 = (s->ccch_conf == 1) ? 27 : 50;
- LOGP(DRR, LOGL_INFO, "RANDOM ACCESS (ra 0x%02x)\n", nra->ra);
-#endif
+ LOGP(DRR, LOGL_INFO, "RANDOM ACCESS (Tx-integer %d combined %s "
+ "S(lots) %d ra 0x%02x offset %d)\n", s->tx_integer,
+ (s->ccch_conf == 1) ? "yes": "no", slots, nra->ra, nra->mf_off);
/* shift history and store */
- rr->cr_hist[2] = rr->cr_hist[1];
- rr->cr_hist[1] = rr->cr_hist[0];
- rr->cr_hist[0] = chan_req;
+ memcpy(&(rr->cr_hist[2]), &(rr->cr_hist[1]),
+ sizeof(struct gsm48_cr_hist));
+ memcpy(&(rr->cr_hist[1]), &(rr->cr_hist[0]),
+ sizeof(struct gsm48_cr_hist));
+ rr->cr_hist[0].valid = 1;
+ rr->cr_hist[0].chan_req = chan_req;
#ifdef TODO
add layer 1 conrols to RSL...
/* decode "Mobile Allocation" (10.5.2.21) */
static int gsm48_decode_mobile_alloc(struct gsm48_sysinfo *s,
- uint8_t *ma, uint8_t len)
+ uint8_t *ma, uint8_t len, uint16_t *hopping, uint8_t *hopp_len, int si4)
{
int i, j = 0;
uint16_t f[len << 3];
return -EINVAL;
/* tabula rasa */
- s->hopp_len = 0;
- for (i = 0; i < 1024; i++)
- s->freq[i].mask &= ~FREQ_TYPE_HOPP;
+ *hopp_len = 0;
+ if (si4) {
+ for (i = 0; i < 1024; i++)
+ s->freq[i].mask &= ~FREQ_TYPE_HOPP;
+ }
/* generating list of all frequencies (1..1023,0) */
for (i = 1; i <= 1024; i++) {
if ((s->freq[i & 1023].mask & FREQ_TYPE_SERV)) {
+ LOGP(DRR, LOGL_INFO, "Serving cell ARFCN #%d: %d\n",
+ j, i & 1023);
f[j++] = i & 1023;
if (j == (len << 3))
break;
for (i = 0; i < (len << 3); i++) {
/* if bit is set, this frequency index is used for hopping */
if ((ma[len - 1 - (i >> 3)] & (1 << (i & 7)))) {
+ LOGP(DRR, LOGL_INFO, "Hopping ARFCN: %d (bit %d)\n",
+ i, f[i]);
/* index higher than entries in list ? */
if (i >= j) {
LOGP(DRR, LOGL_NOTICE, "Mobile Allocation "
i + 1, j);
break;
}
- s->hopping[s->hopp_len++] = f[i];
- s->freq[f[i]].mask |= FREQ_TYPE_HOPP;
+ hopping[(*hopp_len)++] = f[i];
+ if (si4)
+ s->freq[f[i]].mask |= FREQ_TYPE_HOPP;
}
}
static int gsm48_rr_rx_sysinfo3(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_system_information_type_3 *si = msgb_l3(msg);
- struct gsm48_sysinfo *s = ms->cellsel.si;
+ struct gsm322_cellsel *cs = &ms->cellsel;
+ struct gsm48_sysinfo *s = cs->si;
int payload_len = msgb_l3len(msg) - sizeof(*si);
if (!s) {
s->si3 = 1;
+ if (cs->ccch_mode == CCCH_MODE_NONE) {
+ cs->ccch_mode = (s->ccch_conf == 1) ? CCCH_MODE_COMBINED :
+ CCCH_MODE_NON_COMBINED;
+ LOGP(DRR, LOGL_NOTICE, "Changing CCCH_MODE to %d\n",
+ cs->ccch_mode);
+ l1ctl_tx_ccch_mode_req(ms, cs->ccch_mode);
+ }
+
return gsm48_send_sysinfo(ms, si->header.system_information);
}
return -EINVAL;
}
+ if (!s->si1) {
+ LOGP(DRR, LOGL_NOTICE, "Ignoring SYSTEM INFORMATION 4 "
+ "until SI 1 is received.\n");
+ return -EBUSY;
+ }
+
if (!memcmp(si, s->si4_msg, MIN(msgb_l3len(msg), sizeof(s->si4_msg))))
return 0;
memcpy(s->si4_msg, si, MIN(msgb_l3len(msg), sizeof(s->si4_msg)));
if (payload_len >= 1 && data[0] == GSM48_IE_CBCH_MOB_AL) {
if (payload_len < 1 || payload_len < 2 + data[1])
goto short_read;
- gsm48_decode_mobile_alloc(s, data + 2, si->data[1]);
+ gsm48_decode_mobile_alloc(s, data + 2, si->data[1], s->hopping,
+ &s->hopp_len, 1);
payload_len -= 2 + data[1];
data += 2 + data[1];
}
{
struct gsm48_rrlayer *rr = &ms->rrlayer;
int i;
+ struct gsm_time tm;
+ uint8_t ia_t1, ia_t2, ia_t3;
for (i = 0; i < 3; i++) {
- if (rr->cr_hist[i] >= 0
- && ref->ra == rr->cr_hist[i]) {
- LOGP(DRR, LOGL_INFO, "request %02x matches\n", ref->ra);
- // todo: match timeslot
- return 1;
+ /* filter confirmed RACH requests only */
+ if (rr->cr_hist[i].valid == 2
+ && ref->ra == rr->cr_hist[i].chan_req) {
+ ia_t1 = ref->t1;
+ ia_t2 = ref->t2;
+ ia_t3 = (ref->t3_high << 3) | ref->t3_low;
+ gsm_fn2gsmtime(&tm, rr->cr_hist[i].fn);
+ if (ia_t1 == (tm.t1 & 0x1f) && ia_t2 == tm.t2
+ && ia_t3 == tm.t3) {
+ LOGP(DRR, LOGL_INFO, "request %02x matches "
+ "(fn=%d,%d,%d)\n", ref->ra, ia_t1,
+ ia_t2, ia_t3);
+ return 1;
+ } else
+ LOGP(DRR, LOGL_INFO, "request %02x matches "
+ "but not frame number (IMM.ASS "
+ "fn=%d,%d,%d != RACH fn=%d,%d,%d)\n",
+ ref->ra, ia_t1, ia_t2, ia_t3,
+ tm.t1 & 0x1f, tm.t2, tm.t3);
}
}
{
struct gsm48_rrlayer *rr = &ms->rrlayer;
struct gsm_subscriber *subscr = &ms->subscr;
+ struct gsm322_cellsel *cs = &ms->cellsel;
+ struct gsm48_sysinfo *s = cs->si;
struct msgb *nmsg;
struct gsm48_hdr *gh;
struct gsm48_pag_rsp *pr;
uint8_t mi[11];
uint8_t ch_type, ch_subch, ch_ts;
+ uint16_t ma[64];
+ uint8_t ma_len;
/* 3.3.1.1.3.1 */
stop_rr_t3126(rr);
- /* flush pending RACH requests */
-#ifdef TODO
- rr->n_chan_req = 0; // just to be safe
- nmsg = msgb_alloc_headroom(20, 16, "RAND_FLUSH");
- if (!nmsg)
- return -ENOMEM;
- gsm48_send_rsl(ms, RSL_MT_RAND_ACC_FLSH, msg);
-#else
- if (bsc_timer_pending(&rr->temp_rach_ti))
- bsc_del_timer(&rr->temp_rach_ti);
-#endif
+ if (rr->cd_now.h) {
+ gsm48_decode_mobile_alloc(s, rr->cd_now.mob_alloc_lv + 1,
+ rr->cd_now.mob_alloc_lv[0], ma, &ma_len, 0);
+ if (ma_len < 1) {
+ LOGP(DRR, LOGL_NOTICE, "Hopping, but no allocation\n");
+ return -EINVAL;
+ }
+ }
/* send DL_EST_REQ */
if (rr->rr_est_msg) {
RSL_MT_ to activate channel with all the cd_now informations
#else
rsl_dec_chan_nr(rr->cd_now.chan_nr, &ch_type, &ch_subch, &ch_ts);
- if (ch_type != RSL_CHAN_SDCCH4_ACCH || ch_ts != 0) {
- printf("Channel type not supported, exitting.\n");
+ if ((ch_type != RSL_CHAN_SDCCH8_ACCH
+ && ch_type != RSL_CHAN_SDCCH4_ACCH) || ch_ts > 4) {
+ printf("Channel type %d, subch %d, ts %d not supported, "
+ "exitting.\n", ch_type, ch_subch, ch_ts);
exit(-ENOTSUP);
}
- tx_ph_dm_est_req(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr);
+ if (rr->cd_now.h)
+ tx_ph_dm_est_req_h1(ms, rr->cd_now.maio, rr->cd_now.hsn,
+ ma, ma_len, rr->cd_now.chan_nr, rr->cd_now.tsc, 0);
+ else
+ tx_ph_dm_est_req_h0(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr,
+ rr->cd_now.tsc, 0);
#endif
/* start establishmnet */
struct gsm48_system_information_type_header *sih = msgb_l3(msg);
switch (sih->system_information) {
- case GSM48_MT_RR_SYSINFO_5:
- return gsm48_rr_rx_sysinfo5(ms, msg);
- case GSM48_MT_RR_SYSINFO_5bis:
- return gsm48_rr_rx_sysinfo5bis(ms, msg);
- case GSM48_MT_RR_SYSINFO_5ter:
- return gsm48_rr_rx_sysinfo5ter(ms, msg);
- case GSM48_MT_RR_SYSINFO_6:
- return gsm48_rr_rx_sysinfo6(ms, msg);
-
case GSM48_MT_RR_PAG_REQ_1:
return gsm48_rr_rx_pag_req_1(ms, msg);
case GSM48_MT_RR_PAG_REQ_2:
case GSM48_MT_RR_IMM_ASS_REJ:
return gsm48_rr_rx_imm_ass_rej(ms, msg);
default:
-#if 0
LOGP(DRR, LOGL_NOTICE, "CCCH message type 0x%02x unknown.\n",
sih->system_information);
-#endif
+ return -EINVAL;
+ }
+}
+
+/* receive ACCH at RR layer */
+static int gsm48_rr_rx_acch(struct osmocom_ms *ms, struct msgb *msg)
+{
+ struct gsm48_system_information_type_header *sih = msgb_l3(msg);
+
+ switch (sih->system_information) {
+ case GSM48_MT_RR_SYSINFO_5:
+ return gsm48_rr_rx_sysinfo5(ms, msg);
+ case GSM48_MT_RR_SYSINFO_5bis:
+ return gsm48_rr_rx_sysinfo5bis(ms, msg);
+ case GSM48_MT_RR_SYSINFO_5ter:
+ return gsm48_rr_rx_sysinfo5ter(ms, msg);
+ case GSM48_MT_RR_SYSINFO_6:
+ return gsm48_rr_rx_sysinfo6(ms, msg);
+ default:
+ LOGP(DRR, LOGL_NOTICE, "ACCH message type 0x%02x unknown.\n",
+ sih->system_information);
return -EINVAL;
}
}
// TODO: timer depends on BCCH config
}
- switch (rllh->chan_nr) {
- case RSL_CHAN_PCH_AGCH:
+ if (rllh->chan_nr == RSL_CHAN_PCH_AGCH)
return gsm48_rr_rx_pch_agch(ms, msg);
- case RSL_CHAN_BCCH:
-#if 0
-#warning testing corrupt frames
-{int i;
-if (ms->cellsel.state == GSM322_C7_CAMPED_ANY_CELL)
-for(i=0;i<msgb_l3len(msg);i++)
- msg->l3h[i] = random();
- }
-#endif
+ if (rllh->chan_nr == RSL_CHAN_BCCH)
return gsm48_rr_rx_bcch(ms, msg);
- default:
- LOGP(DRSL, LOGL_NOTICE, "RSL with chan_nr 0x%02x unknown.\n",
- rllh->chan_nr);
- return -EINVAL;
- }
+ if ((rllh->chan_nr & 0xf0) == RSL_CHAN_SDCCH4_ACCH)
+ return gsm48_rr_rx_acch(ms, msg);
+ if ((rllh->chan_nr & 0xf0) == RSL_CHAN_SDCCH8_ACCH)
+ return gsm48_rr_rx_acch(ms, msg);
+ LOGP(DRSL, LOGL_NOTICE, "RSL with chan_nr 0x%02x unknown.\n",
+ rllh->chan_nr);
+ return -EINVAL;
}
/* 3.4.13.3 RR abort in dedicated mode (also in conn. pending mode) */
struct msgb *nmsg;
/* change radio to new channel */
- tx_ph_dm_est_req(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr);
+//todo tx_ph_dm_est_req(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr,
+// rr->cd_now.tsc);
/* send DL-ESTABLISH REQUEST */
nmsg = gsm48_l3_msgb_alloc();
/* change radio to old channel */
tx_ph_dm_est_req(ms, rr->cd_now.arfcn,
- rr->cd_now.chan_nr);
+ rr->cd_now.chan_nr, rr->cd_now.tsc);
/* re-establish old link */
nmsg = gsm48_l3_msgb_alloc();
memcpy(&rr->chan_desc, &rr->chan_last, sizeof(*cd));
/* change radio to old channel */
- tx_ph_dm_est_req(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr);
+ tx_ph_dm_est_req(ms, rr->cd_now.arfcn, rr->cd_now.chan_nr,
+ rr->cd_now.tsc);
/* re-establish old link */
nmsg = gsm48_l3_msgb_alloc();
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