| /* GPRS Gb message parser */ |
| |
| /* (C) 2014 by On-Waves |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <osmocom/gsm/gsm48.h> |
| #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
| |
| #include <openbsc/gprs_gb_parse.h> |
| |
| #include <openbsc/gprs_utils.h> |
| |
| #include <openbsc/debug.h> |
| |
| #include <osmocom/gprs/gprs_bssgp.h> |
| |
| static int gprs_gb_parse_gmm_attach_req(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| size_t value_len; |
| |
| parse_ctx->llc_msg_name = "ATTACH_REQ"; |
| |
| /* Skip MS network capability */ |
| if (osmo_shift_lv(&data, &data_len, NULL, &value_len) <= 0 || |
| value_len < 1 || value_len > 8) |
| /* invalid */ |
| return 0; |
| |
| /* Skip Attach type */ |
| /* Skip Ciphering key sequence number */ |
| /* Skip DRX parameter */ |
| osmo_shift_v_fixed(&data, &data_len, 3, NULL); |
| |
| /* Get Mobile identity */ |
| if (osmo_shift_lv(&data, &data_len, &value, &value_len) <= 0 || |
| value_len < 5 || value_len > 8) |
| /* invalid */ |
| return 0; |
| |
| if (gprs_is_mi_tmsi(value, value_len)) { |
| parse_ctx->ptmsi_enc = value + 1; |
| } else if (gprs_is_mi_imsi(value, value_len)) { |
| parse_ctx->imsi = value; |
| parse_ctx->imsi_len = value_len; |
| } |
| |
| if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) |
| return 0; |
| |
| parse_ctx->old_raid_enc = value; |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_attach_ack(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| size_t value_len; |
| |
| parse_ctx->llc_msg_name = "ATTACH_ACK"; |
| |
| /* Skip Attach result */ |
| /* Skip Force to standby */ |
| /* Skip Periodic RA update timer */ |
| /* Skip Radio priority for SMS */ |
| /* Skip Spare half octet */ |
| osmo_shift_v_fixed(&data, &data_len, 3, NULL); |
| |
| if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) |
| return 0; |
| |
| parse_ctx->raid_enc = value; |
| |
| /* Skip P-TMSI signature (P-TMSI signature, opt, TV, length 4) */ |
| osmo_match_shift_tv_fixed(&data, &data_len, GSM48_IE_GMM_PTMSI_SIG, 3, NULL); |
| |
| /* Skip Negotiated READY timer value (GPRS timer, opt, TV, length 2) */ |
| osmo_match_shift_tv_fixed(&data, &data_len, GSM48_IE_GMM_TIMER_READY, 1, NULL); |
| |
| /* Allocated P-TMSI (Mobile identity, opt, TLV, length 7) */ |
| if (osmo_match_shift_tlv(&data, &data_len, GSM48_IE_GMM_ALLOC_PTMSI, |
| &value, &value_len) > 0 && |
| gprs_is_mi_tmsi(value, value_len)) |
| parse_ctx->new_ptmsi_enc = value + 1; |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_attach_rej(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| |
| parse_ctx->llc_msg_name = "ATTACH_REJ"; |
| |
| /* GMM cause */ |
| if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) |
| return 0; |
| |
| parse_ctx->invalidate_tlli = 1; |
| |
| return 1; |
| } |
| |
| |
| static int gprs_gb_parse_gmm_detach_req(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| size_t value_len; |
| int detach_type; |
| int power_off; |
| |
| parse_ctx->llc_msg_name = "DETACH_REQ"; |
| |
| /* Skip spare half octet */ |
| /* Get Detach type */ |
| if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) |
| /* invalid */ |
| return 0; |
| |
| detach_type = *value & 0x07; |
| power_off = *value & 0x08 ? 1 : 0; |
| |
| if (parse_ctx->to_bss) { |
| /* Network originated */ |
| if (detach_type == GPRS_DET_T_MT_REATT_REQ) |
| parse_ctx->await_reattach = 1; |
| } else { |
| /* Mobile originated */ |
| |
| if (power_off) |
| parse_ctx->invalidate_tlli = 1; |
| |
| /* Get P-TMSI (Mobile identity), see GSM 24.008, 9.4.5.2 */ |
| if (osmo_match_shift_tlv(&data, &data_len, |
| GSM48_IE_GMM_ALLOC_PTMSI, &value, &value_len) > 0) |
| { |
| if (gprs_is_mi_tmsi(value, value_len)) |
| parse_ctx->ptmsi_enc = value + 1; |
| } |
| } |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_ra_upd_req(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| |
| parse_ctx->llc_msg_name = "RA_UPD_REQ"; |
| |
| /* Skip Update type */ |
| /* Skip GPRS ciphering key sequence number */ |
| osmo_shift_v_fixed(&data, &data_len, 1, NULL); |
| |
| if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) |
| return 0; |
| |
| parse_ctx->old_raid_enc = value; |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_ra_upd_rej(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| uint8_t cause; |
| int force_standby; |
| |
| parse_ctx->llc_msg_name = "RA_UPD_REJ"; |
| |
| /* GMM cause */ |
| if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) |
| return 0; |
| |
| cause = value[0]; |
| |
| /* Force to standby, 1/2 */ |
| /* spare bits, 1/2 */ |
| if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) |
| return 0; |
| |
| force_standby = (value[0] & 0x07) == 0x01; |
| |
| if (cause == GMM_CAUSE_IMPL_DETACHED && !force_standby) |
| parse_ctx->await_reattach = 1; |
| |
| parse_ctx->invalidate_tlli = 1; |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_ra_upd_ack(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| size_t value_len; |
| |
| parse_ctx->llc_msg_name = "RA_UPD_ACK"; |
| |
| /* Skip Force to standby */ |
| /* Skip Update result */ |
| /* Skip Periodic RA update timer */ |
| osmo_shift_v_fixed(&data, &data_len, 2, NULL); |
| |
| if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) |
| return 0; |
| |
| parse_ctx->raid_enc = value; |
| |
| /* Skip P-TMSI signature (P-TMSI signature, opt, TV, length 4) */ |
| osmo_match_shift_tv_fixed(&data, &data_len, GSM48_IE_GMM_PTMSI_SIG, 3, NULL); |
| |
| /* Allocated P-TMSI (Mobile identity, opt, TLV, length 7) */ |
| if (osmo_match_shift_tlv(&data, &data_len, GSM48_IE_GMM_ALLOC_PTMSI, |
| &value, &value_len) > 0 && |
| gprs_is_mi_tmsi(value, value_len)) |
| parse_ctx->new_ptmsi_enc = value + 1; |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_ptmsi_reall_cmd(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| size_t value_len; |
| |
| parse_ctx->llc_msg_name = "PTMSI_REALL_CMD"; |
| |
| LOGP(DLLC, LOGL_NOTICE, |
| "Got P-TMSI Reallocation Command which is not covered by unit tests yet.\n"); |
| |
| /* Allocated P-TMSI */ |
| if (osmo_shift_lv(&data, &data_len, &value, &value_len) > 0 && |
| gprs_is_mi_tmsi(value, value_len)) |
| parse_ctx->new_ptmsi_enc = value + 1; |
| |
| if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) |
| return 0; |
| |
| parse_ctx->raid_enc = value; |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gmm_id_resp(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| uint8_t *value; |
| size_t value_len; |
| |
| parse_ctx->llc_msg_name = "ID_RESP"; |
| |
| /* Mobile identity, Mobile identity 10.5.1.4, M LV 2-10 */ |
| if (osmo_shift_lv(&data, &data_len, &value, &value_len) <= 0 || |
| value_len < 1 || value_len > 9) |
| /* invalid */ |
| return 0; |
| |
| if (gprs_is_mi_tmsi(value, value_len)) { |
| parse_ctx->ptmsi_enc = value + 1; |
| } else if (gprs_is_mi_imsi(value, value_len)) { |
| parse_ctx->imsi = value; |
| parse_ctx->imsi_len = value_len; |
| } |
| |
| return 1; |
| } |
| |
| static int gprs_gb_parse_gsm_act_pdp_req(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| ssize_t old_len; |
| uint8_t *value; |
| size_t value_len; |
| |
| parse_ctx->llc_msg_name = "ACT_PDP_REQ"; |
| |
| /* Skip Requested NSAPI */ |
| /* Skip Requested LLC SAPI */ |
| osmo_shift_v_fixed(&data, &data_len, 2, NULL); |
| |
| /* Skip Requested QoS (support 04.08 and 24.008) */ |
| if (osmo_shift_lv(&data, &data_len, NULL, &value_len) <= 0 || |
| value_len < 4 || value_len > 14) |
| /* invalid */ |
| return 0; |
| |
| /* Skip Requested PDP address */ |
| if (osmo_shift_lv(&data, &data_len, NULL, &value_len) <= 0 || |
| value_len < 2 || value_len > 18) |
| /* invalid */ |
| return 0; |
| |
| /* Access point name */ |
| old_len = osmo_match_shift_tlv(&data, &data_len, |
| GSM48_IE_GSM_APN, &value, &value_len); |
| |
| if (old_len > 0 && value_len >=1 && value_len <= 100) { |
| parse_ctx->apn_ie = data - old_len; |
| parse_ctx->apn_ie_len = old_len; |
| } |
| |
| return 1; |
| } |
| |
| int gprs_gb_parse_dtap(uint8_t *data, size_t data_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| struct gsm48_hdr *g48h; |
| uint8_t pdisc; |
| uint8_t msg_type; |
| |
| if (osmo_shift_v_fixed(&data, &data_len, sizeof(*g48h), (uint8_t **)&g48h) <= 0) |
| return 0; |
| |
| parse_ctx->g48_hdr = g48h; |
| |
| pdisc = gsm48_hdr_pdisc(g48h); |
| if (pdisc != GSM48_PDISC_MM_GPRS && pdisc != GSM48_PDISC_SM_GPRS) |
| return 1; |
| |
| msg_type = gsm48_hdr_msg_type(g48h); |
| switch (msg_type) { |
| case GSM48_MT_GMM_ATTACH_REQ: |
| return gprs_gb_parse_gmm_attach_req(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_ATTACH_REJ: |
| return gprs_gb_parse_gmm_attach_rej(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_ATTACH_ACK: |
| return gprs_gb_parse_gmm_attach_ack(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_RA_UPD_REQ: |
| return gprs_gb_parse_gmm_ra_upd_req(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_RA_UPD_REJ: |
| return gprs_gb_parse_gmm_ra_upd_rej(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_RA_UPD_ACK: |
| return gprs_gb_parse_gmm_ra_upd_ack(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_PTMSI_REALL_CMD: |
| return gprs_gb_parse_gmm_ptmsi_reall_cmd(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GSM_ACT_PDP_REQ: |
| return gprs_gb_parse_gsm_act_pdp_req(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_ID_RESP: |
| return gprs_gb_parse_gmm_id_resp(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_DETACH_REQ: |
| return gprs_gb_parse_gmm_detach_req(data, data_len, parse_ctx); |
| |
| case GSM48_MT_GMM_DETACH_ACK: |
| parse_ctx->llc_msg_name = "DETACH_ACK"; |
| parse_ctx->invalidate_tlli = 1; |
| break; |
| |
| default: |
| LOGP(DLLC, LOGL_NOTICE, |
| "Unknown GSM 04.08 message type 0x%02hhx for protocol" |
| " discriminator 0x%02hhx.\n", |
| msg_type, pdisc); |
| break; |
| }; |
| |
| return 1; |
| } |
| |
| int gprs_gb_parse_llc(uint8_t *llc, size_t llc_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| struct gprs_llc_hdr_parsed *ghp = &parse_ctx->llc_hdr_parsed; |
| int rc; |
| int fcs; |
| |
| /* parse LLC */ |
| rc = gprs_llc_hdr_parse(ghp, llc, llc_len); |
| gprs_llc_hdr_dump(ghp); |
| if (rc != 0) { |
| LOGP(DLLC, LOGL_NOTICE, "Error during LLC header parsing\n"); |
| return 0; |
| } |
| |
| fcs = gprs_llc_fcs(llc, ghp->crc_length); |
| LOGP(DLLC, LOGL_DEBUG, "Got LLC message, CRC: %06x (computed %06x)\n", |
| ghp->fcs, fcs); |
| |
| if (!ghp->data) |
| return 0; |
| |
| if (ghp->sapi != GPRS_SAPI_GMM) |
| return 1; |
| |
| if (ghp->cmd != GPRS_LLC_UI) |
| return 1; |
| |
| if (ghp->is_encrypted) { |
| parse_ctx->need_decryption = 1; |
| return 0; |
| } |
| |
| return gprs_gb_parse_dtap(ghp->data, ghp->data_len, parse_ctx); |
| } |
| |
| int gprs_gb_parse_bssgp(uint8_t *bssgp, size_t bssgp_len, |
| struct gprs_gb_parse_context *parse_ctx) |
| { |
| struct bssgp_normal_hdr *bgph; |
| struct bssgp_ud_hdr *budh = NULL; |
| struct tlv_parsed *tp = &parse_ctx->bssgp_tp; |
| uint8_t pdu_type; |
| uint8_t *data; |
| size_t data_len; |
| int rc; |
| |
| if (bssgp_len < sizeof(struct bssgp_normal_hdr)) |
| return 0; |
| |
| bgph = (struct bssgp_normal_hdr *)bssgp; |
| pdu_type = bgph->pdu_type; |
| |
| if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
| if (bssgp_len < sizeof(struct bssgp_ud_hdr)) |
| return 0; |
| budh = (struct bssgp_ud_hdr *)bssgp; |
| bgph = NULL; |
| data = budh->data; |
| data_len = bssgp_len - sizeof(*budh); |
| } else { |
| data = bgph->data; |
| data_len = bssgp_len - sizeof(*bgph); |
| } |
| |
| parse_ctx->pdu_type = pdu_type; |
| parse_ctx->bud_hdr = budh; |
| parse_ctx->bgp_hdr = bgph; |
| parse_ctx->bssgp_data = data; |
| parse_ctx->bssgp_data_len = data_len; |
| |
| if (bssgp_tlv_parse(tp, data, data_len) < 0) |
| return 0; |
| |
| if (budh) |
| parse_ctx->tlli_enc = (uint8_t *)&budh->tlli; |
| |
| if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) |
| parse_ctx->bssgp_raid_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); |
| |
| if (TLVP_PRESENT(tp, BSSGP_IE_CELL_ID)) |
| parse_ctx->bssgp_raid_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_CELL_ID); |
| |
| if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { |
| parse_ctx->imsi = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_IMSI); |
| parse_ctx->imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI); |
| } |
| |
| if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) { |
| if (parse_ctx->tlli_enc) |
| /* This is TLLI old, don't confuse it with TLLI current */ |
| parse_ctx->old_tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI); |
| else |
| parse_ctx->tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI); |
| } |
| |
| if (TLVP_PRESENT(tp, BSSGP_IE_TMSI) && pdu_type == BSSGP_PDUT_PAGING_PS) |
| parse_ctx->bssgp_ptmsi_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TMSI); |
| |
| if (TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) { |
| uint8_t *llc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LLC_PDU); |
| size_t llc_len = TLVP_LEN(tp, BSSGP_IE_LLC_PDU); |
| |
| rc = gprs_gb_parse_llc(llc, llc_len, parse_ctx); |
| if (!rc) |
| return 0; |
| |
| parse_ctx->llc = llc; |
| parse_ctx->llc_len = llc_len; |
| } |
| |
| if (parse_ctx->tlli_enc) { |
| uint32_t tmp_tlli; |
| memcpy(&tmp_tlli, parse_ctx->tlli_enc, sizeof(tmp_tlli)); |
| parse_ctx->tlli = ntohl(tmp_tlli); |
| } |
| |
| if (parse_ctx->bssgp_raid_enc && parse_ctx->old_raid_enc && |
| memcmp(parse_ctx->bssgp_raid_enc, parse_ctx->old_raid_enc, 6) != 0) |
| parse_ctx->old_raid_is_foreign = 1; |
| |
| return 1; |
| } |
| |
| void gprs_gb_log_parse_context(int log_level, |
| struct gprs_gb_parse_context *parse_ctx, |
| const char *default_msg_name) |
| { |
| const char *msg_name; |
| const char *sep = ""; |
| |
| if (!parse_ctx->tlli_enc && |
| !parse_ctx->ptmsi_enc && |
| !parse_ctx->new_ptmsi_enc && |
| !parse_ctx->bssgp_ptmsi_enc && |
| !parse_ctx->imsi) |
| return; |
| |
| msg_name = gprs_gb_message_name(parse_ctx, default_msg_name); |
| |
| if (parse_ctx->llc_msg_name) |
| msg_name = parse_ctx->llc_msg_name; |
| |
| LOGP(DGPRS, log_level, "%s: Got", msg_name); |
| |
| if (parse_ctx->tlli_enc) { |
| LOGPC(DGPRS, log_level, "%s TLLI %08x", sep, parse_ctx->tlli); |
| sep = ","; |
| } |
| |
| if (parse_ctx->old_tlli_enc) { |
| LOGPC(DGPRS, log_level, "%s old TLLI %02x%02x%02x%02x", sep, |
| parse_ctx->old_tlli_enc[0], |
| parse_ctx->old_tlli_enc[1], |
| parse_ctx->old_tlli_enc[2], |
| parse_ctx->old_tlli_enc[3]); |
| sep = ","; |
| } |
| |
| if (parse_ctx->bssgp_raid_enc) { |
| struct gprs_ra_id raid; |
| gsm48_parse_ra(&raid, parse_ctx->bssgp_raid_enc); |
| LOGPC(DGPRS, log_level, "%s BSSGP RAID %u-%u-%u-%u", sep, |
| raid.mcc, raid.mnc, raid.lac, raid.rac); |
| sep = ","; |
| } |
| |
| if (parse_ctx->raid_enc) { |
| struct gprs_ra_id raid; |
| gsm48_parse_ra(&raid, parse_ctx->raid_enc); |
| LOGPC(DGPRS, log_level, "%s RAID %u-%u-%u-%u", sep, |
| raid.mcc, raid.mnc, raid.lac, raid.rac); |
| sep = ","; |
| } |
| |
| if (parse_ctx->old_raid_enc) { |
| struct gprs_ra_id raid; |
| gsm48_parse_ra(&raid, parse_ctx->old_raid_enc); |
| LOGPC(DGPRS, log_level, "%s old RAID %u-%u-%u-%u", sep, |
| raid.mcc, raid.mnc, raid.lac, raid.rac); |
| sep = ","; |
| } |
| |
| if (parse_ctx->bssgp_ptmsi_enc) { |
| uint32_t ptmsi = GSM_RESERVED_TMSI; |
| gprs_parse_tmsi(parse_ctx->bssgp_ptmsi_enc, &ptmsi); |
| LOGPC(DGPRS, log_level, "%s BSSGP PTMSI %08x", sep, ptmsi); |
| sep = ","; |
| } |
| |
| if (parse_ctx->ptmsi_enc) { |
| uint32_t ptmsi = GSM_RESERVED_TMSI; |
| gprs_parse_tmsi(parse_ctx->ptmsi_enc, &ptmsi); |
| LOGPC(DGPRS, log_level, "%s PTMSI %08x", sep, ptmsi); |
| sep = ","; |
| } |
| |
| if (parse_ctx->new_ptmsi_enc) { |
| uint32_t new_ptmsi = GSM_RESERVED_TMSI; |
| gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_ptmsi); |
| LOGPC(DGPRS, log_level, "%s new PTMSI %08x", sep, new_ptmsi); |
| sep = ","; |
| } |
| |
| if (parse_ctx->imsi) { |
| char mi_buf[200]; |
| mi_buf[0] = '\0'; |
| gsm48_mi_to_string(mi_buf, sizeof(mi_buf), |
| parse_ctx->imsi, parse_ctx->imsi_len); |
| LOGPC(DGPRS, log_level, "%s IMSI %s", |
| sep, mi_buf); |
| sep = ","; |
| } |
| if (parse_ctx->invalidate_tlli) { |
| LOGPC(DGPRS, log_level, "%s invalidate", sep); |
| sep = ","; |
| } |
| if (parse_ctx->await_reattach) { |
| LOGPC(DGPRS, log_level, "%s re-attach", sep); |
| sep = ","; |
| } |
| |
| LOGPC(DGPRS, log_level, "\n"); |
| } |
| |
| const char *gprs_gb_message_name(const struct gprs_gb_parse_context *parse_ctx, |
| const char *default_msg_name) |
| { |
| if (parse_ctx->llc_msg_name) |
| return parse_ctx->llc_msg_name; |
| |
| if (parse_ctx->g48_hdr) |
| return "GMM"; |
| |
| if (parse_ctx->llc) |
| return "LLC"; |
| |
| if (parse_ctx->bud_hdr) |
| return "BSSGP-UNITDATA"; |
| |
| if (parse_ctx->bgp_hdr) |
| return "BSSGP"; |
| |
| return "unknown"; |
| } |