diff options
Diffstat (limited to 'src/gsm_04_08.c')
| -rw-r--r-- | src/gsm_04_08.c | 143 |
1 files changed, 141 insertions, 2 deletions
diff --git a/src/gsm_04_08.c b/src/gsm_04_08.c index 80c3771db..274d3b6bf 100644 --- a/src/gsm_04_08.c +++ b/src/gsm_04_08.c @@ -118,6 +118,63 @@ static const char *rr_cause_name(u_int8_t cause) return strbuf; } +static void parse_meas_rep(struct gsm_meas_rep *rep, const u_int8_t *data, + int len) +{ + memset(rep, 0, sizeof(*rep)); + + if (data[0] & 0x80) + rep->flags |= MEAS_REP_F_BA1; + if (data[0] & 0x40) + rep->flags |= MEAS_REP_F_DTX; + if (data[1] & 0x40) + rep->flags |= MEAS_REP_F_VALID; + + rep->rxlev_full = data[0] & 0x3f; + rep->rxlev_sub = data[1] & 0x3f; + rep->rxqual_full = (data[3] >> 4) & 0x7; + rep->rxqual_sub = (data[3] >> 1) & 0x7; + rep->num_cell = data[4] >> 6 | ((data[3] & 0x01) << 2); + if (rep->num_cell < 1) + return; + + /* an encoding nightmare in perfection */ + + rep->cell[0].rxlev = data[4] & 0x3f; + rep->cell[0].bcch_freq = data[5] >> 2; + rep->cell[0].bsic = ((data[5] & 0x03) << 3) | (data[6] >> 5); + if (rep->num_cell < 2) + return; + + rep->cell[1].rxlev = ((data[6] & 0x1f) << 1) | (data[7] >> 7); + rep->cell[1].bcch_freq = (data[7] >> 2) & 0x1f; + rep->cell[1].bsic = ((data[7] & 0x03) << 4) | (data[8] >> 4); + if (rep->num_cell < 3) + return; + + rep->cell[2].rxlev = ((data[8] & 0x0f) << 2) | (data[9] >> 6); + rep->cell[2].bcch_freq = (data[9] >> 1) & 0x1f; + rep->cell[2].bsic = ((data[9] & 0x01) << 6) | (data[10] >> 3); + if (rep->num_cell < 4) + return; + + rep->cell[3].rxlev = ((data[10] & 0x07) << 3) | (data[11] >> 5); + rep->cell[3].bcch_freq = data[11] & 0x1f; + rep->cell[3].bsic = data[12] >> 2; + if (rep->num_cell < 5) + return; + + rep->cell[4].rxlev = ((data[12] & 0x03) << 4) | (data[13] >> 4); + rep->cell[4].bcch_freq = ((data[13] & 0xf) << 1) | (data[14] >> 7); + rep->cell[4].bsic = (data[14] >> 1) & 0x3f; + if (rep->num_cell < 6) + return; + + rep->cell[5].rxlev = ((data[14] & 0x01) << 5) | (data[15] >> 3); + rep->cell[5].bcch_freq = ((data[15] & 0x07) << 2) | (data[16] >> 6); + rep->cell[5].bsic = data[16] & 0x3f; +} + int gsm0408_loc_upd_acc(struct gsm_lchan *lchan, u_int32_t tmsi); static int gsm48_tx_simple(struct gsm_lchan *lchan, u_int8_t pdisc, u_int8_t msg_type); @@ -847,6 +904,9 @@ static int gsm48_rx_mm_serv_req(struct msgb *msg) subscr_put(subscr); } + subscr->classmark2_len = classmark2_len; + memcpy(subscr->classmark2, classmark2, classmark2_len); + return gsm48_tx_mm_serv_ack(msg->lchan); } @@ -979,6 +1039,9 @@ static int gsm48_rr_rx_pag_resp(struct msgb *msg) DEBUGP(DRR, "<- Channel was requested by %s\n", subscr->name ? subscr->name : subscr->imsi); + subscr->classmark2_len = *classmark2_lv; + memcpy(subscr->classmark2, classmark2_lv+1, *classmark2_lv); + if (!msg->lchan->subscr) { msg->lchan->subscr = subscr; } else if (msg->lchan->subscr != subscr) { @@ -1004,6 +1067,54 @@ static int gsm48_rr_rx_pag_resp(struct msgb *msg) return rc; } +static int gsm48_rx_rr_classmark(struct msgb *msg) +{ + struct gsm48_hdr *gh = msgb_l3(msg); + struct gsm_subscriber *subscr = msg->lchan->subscr; + unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); + u_int8_t cm2_len, cm3_len = 0; + u_int8_t *cm2, *cm3 = NULL; + + DEBUGP(DRR, "CLASSMARK CHANGE "); + + /* classmark 2 */ + cm2_len = gh->data[0]; + cm2 = &gh->data[1]; + DEBUGPC(DRR, "CM2(len=%u) ", cm2_len); + + if (payload_len > cm2_len + 1) { + /* we must have a classmark3 */ + if (gh->data[cm2_len+1] != 0x20) { + DEBUGPC(DRR, "ERR CM3 TAG\n"); + return -EINVAL; + } + if (cm2_len > 3) { + DEBUGPC(DRR, "CM2 too long!\n"); + return -EINVAL; + } + + cm3_len = gh->data[cm2_len+2]; + cm3 = &gh->data[cm2_len+3]; + if (cm3_len > 14) { + DEBUGPC(DRR, "CM3 len %u too long!\n", cm3_len); + return -EINVAL; + } + DEBUGPC(DRR, "CM3(len=%u)\n", cm3_len); + } + if (subscr) { + subscr->classmark2_len = cm2_len; + memcpy(subscr->classmark2, cm2, cm2_len); + if (cm3) { + subscr->classmark3_len = cm3_len; + memcpy(subscr->classmark3, cm3, cm3_len); + } + } + + /* FIXME: store the classmark2/3 values with the equipment register */ + + return 0; +} + static int gsm48_rx_rr_status(struct msgb *msg) { struct gsm48_hdr *gh = msgb_l3(msg); @@ -1014,6 +1125,32 @@ static int gsm48_rx_rr_status(struct msgb *msg) return 0; } +static int gsm48_rx_rr_meas_rep(struct msgb *msg) +{ + struct gsm48_hdr *gh = msgb_l3(msg); + unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); + static struct gsm_meas_rep meas_rep; + + DEBUGP(DRR, "MEASUREMENT REPORT "); + parse_meas_rep(&meas_rep, gh->data, payload_len); + if (meas_rep.flags & MEAS_REP_F_DTX) + DEBUGPC(DRR, "DTX "); + if (meas_rep.flags & MEAS_REP_F_BA1) + DEBUGPC(DRR, "BA1 "); + if (!(meas_rep.flags & MEAS_REP_F_VALID)) + DEBUGPC(DRR, "NOT VALID "); + else + DEBUGPC(DRR, "FULL(lev=%u, qual=%u) SUB(lev=%u, qual=%u) ", + meas_rep.rxlev_full, meas_rep.rxqual_full, meas_rep.rxlev_sub, + meas_rep.rxqual_sub); + + DEBUGPC(DRR, "NUM_NEIGH=%u\n", meas_rep.num_cell); + + /* FIXME: put the results somwhere */ + + return 0; +} + /* Receive a GSM 04.08 Radio Resource (RR) message */ static int gsm0408_rcv_rr(struct msgb *msg) { @@ -1022,8 +1159,7 @@ static int gsm0408_rcv_rr(struct msgb *msg) switch (gh->msg_type) { case GSM48_MT_RR_CLSM_CHG: - DEBUGP(DRR, "CLASSMARK CHANGE\n"); - /* FIXME: what to do ?!? */ + rc = gsm48_rx_rr_classmark(msg); break; case GSM48_MT_RR_GPRS_SUSP_REQ: DEBUGP(DRR, "GRPS SUSPEND REQUEST\n"); @@ -1038,6 +1174,9 @@ static int gsm0408_rcv_rr(struct msgb *msg) case GSM48_MT_RR_STATUS: rc = gsm48_rx_rr_status(msg); break; + case GSM48_MT_RR_MEAS_REP: + rc = gsm48_rx_rr_meas_rep(msg); + break; default: fprintf(stderr, "Unimplemented GSM 04.08 RR msg type 0x%02x\n", gh->msg_type); |