/* (C) 2009,2010 by Holger Hans Peter Freyther * (C) 2009,2010 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 General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ #include #include #include #include #define BSSMAP_MSG_SIZE 512 #define BSSMAP_MSG_HEADROOM 128 struct msgb *gsm0808_create_layer3(struct msgb *msg_l3, uint16_t nc, uint16_t cc, int lac, uint16_t _ci) { struct msgb* msg; struct { uint8_t ident; struct gsm48_loc_area_id lai; uint16_t ci; } __attribute__ ((packed)) lai_ci; msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap cmpl l3"); if (!msg) return NULL; /* create layer 3 header */ msgb_v_put(msg, BSS_MAP_MSG_COMPLETE_LAYER_3); /* create the cell header */ lai_ci.ident = CELL_IDENT_WHOLE_GLOBAL; gsm48_generate_lai(&lai_ci.lai, cc, nc, lac); lai_ci.ci = htons(_ci); msgb_tlv_put(msg, GSM0808_IE_CELL_IDENTIFIER, sizeof(lai_ci), (uint8_t *) &lai_ci); /* copy the layer3 data */ msgb_tlv_put(msg, GSM0808_IE_LAYER_3_INFORMATION, msgb_l3len(msg_l3), msg_l3->l3h); /* push the bssmap header */ msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_reset(void) { uint8_t cause = GSM0808_CAUSE_EQUIPMENT_FAILURE; struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: reset"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_RESET); msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_reset_ack(void) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: reset ack"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_RESET_ACKNOWLEDGE); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_clear_complete(void) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: clear complete"); uint8_t val = BSS_MAP_MSG_CLEAR_COMPLETE; if (!msg) return NULL; msg->l3h = msg->data; msgb_tlv_put(msg, BSSAP_MSG_BSS_MANAGEMENT, 1, &val); return msg; } struct msgb *gsm0808_create_clear_command(uint8_t reason) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: clear command"); if (!msg) return NULL; msg->l3h = msgb_tv_put(msg, BSSAP_MSG_BSS_MANAGEMENT, 4); msgb_v_put(msg, BSS_MAP_MSG_CLEAR_CMD); msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &reason); return msg; } struct msgb *gsm0808_create_cipher_complete(struct msgb *layer3, uint8_t alg_id) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "cipher-complete"); if (!msg) return NULL; /* send response with BSS override for A5/1... cheating */ msgb_v_put(msg, BSS_MAP_MSG_CIPHER_MODE_COMPLETE); /* include layer3 in case we have at least two octets */ if (layer3 && msgb_l3len(layer3) > 2) { msg->l4h = msgb_tlv_put(msg, GSM0808_IE_LAYER_3_MESSAGE_CONTENTS, msgb_l3len(layer3), layer3->l3h); } /* and the optional BSS message */ msgb_tv_put(msg, GSM0808_IE_CHOSEN_ENCR_ALG, alg_id); /* pre-pend the header */ msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_cipher_reject(uint8_t cause) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: clear complete"); if (!msg) return NULL; msgb_tv_put(msg, BSS_MAP_MSG_CIPHER_MODE_REJECT, cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_classmark_update(const uint8_t *cm2, uint8_t cm2_len, const uint8_t *cm3, uint8_t cm3_len) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "classmark-update"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_CLASSMARK_UPDATE); msgb_tlv_put(msg, GSM0808_IE_CLASSMARK_INFORMATION_T2, cm2_len, cm2); if (cm3) msgb_tlv_put(msg, GSM0808_IE_CLASSMARK_INFORMATION_T3, cm3_len, cm3); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_sapi_reject(uint8_t link_id) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: sapi 'n' reject"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_SAPI_N_REJECT); msgb_v_put(msg, link_id); msgb_v_put(msg, GSM0808_CAUSE_BSS_NOT_EQUIPPED); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_assignment_completed(uint8_t rr_cause, uint8_t chosen_channel, uint8_t encr_alg_id, uint8_t speech_mode) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: ass compl"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_ASSIGMENT_COMPLETE); /* write 3.2.2.22 */ msgb_tv_put(msg, GSM0808_IE_RR_CAUSE, rr_cause); /* write cirtcuit identity code 3.2.2.2 */ /* write cell identifier 3.2.2.17 */ /* write chosen channel 3.2.2.33 when BTS picked it */ msgb_tv_put(msg, GSM0808_IE_CHOSEN_CHANNEL, chosen_channel); /* write chosen encryption algorithm 3.2.2.44 */ msgb_tv_put(msg, GSM0808_IE_CHOSEN_ENCR_ALG, encr_alg_id); /* write circuit pool 3.2.2.45 */ /* write speech version chosen: 3.2.2.51 when BTS picked it */ if (speech_mode != 0) msgb_tv_put(msg, GSM0808_IE_SPEECH_VERSION, speech_mode); /* write LSA identifier 3.2.2.15 */ msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_assignment_failure(uint8_t cause, uint8_t *rr_cause) { struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: ass fail"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_ASSIGMENT_FAILURE); msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); /* RR cause 3.2.2.22 */ if (rr_cause) msgb_tv_put(msg, GSM0808_IE_RR_CAUSE, *rr_cause); /* Circuit pool 3.22.45 */ /* Circuit pool list 3.2.2.46 */ /* update the size */ msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } struct msgb *gsm0808_create_clear_rqst(uint8_t cause) { struct msgb *msg; msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: clear rqst"); if (!msg) return NULL; msgb_v_put(msg, BSS_MAP_MSG_CLEAR_RQST); msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; } void gsm0808_prepend_dtap_header(struct msgb *msg, uint8_t link_id) { uint8_t *hh = msgb_push(msg, 3); hh[0] = BSSAP_MSG_DTAP; hh[1] = link_id; hh[2] = msg->len - 3; } struct msgb *gsm0808_create_dtap(struct msgb *msg_l3, uint8_t link_id) { struct dtap_header *header; uint8_t *data; struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "dtap"); if (!msg) return NULL; /* DTAP header */ msg->l3h = msgb_put(msg, sizeof(*header)); header = (struct dtap_header *) &msg->l3h[0]; header->type = BSSAP_MSG_DTAP; header->link_id = link_id; header->length = msgb_l3len(msg_l3); /* Payload */ data = msgb_put(msg, header->length); memcpy(data, msg_l3->l3h, header->length); return msg; } static const struct tlv_definition bss_att_tlvdef = { .def = { [GSM0808_IE_IMSI] = { TLV_TYPE_TLV }, [GSM0808_IE_TMSI] = { TLV_TYPE_TLV }, [GSM0808_IE_CELL_IDENTIFIER_LIST] = { TLV_TYPE_TLV }, [GSM0808_IE_CHANNEL_NEEDED] = { TLV_TYPE_TV }, [GSM0808_IE_EMLPP_PRIORITY] = { TLV_TYPE_TV }, [GSM0808_IE_CHANNEL_TYPE] = { TLV_TYPE_TLV }, [GSM0808_IE_PRIORITY] = { TLV_TYPE_TLV }, [GSM0808_IE_CIRCUIT_IDENTITY_CODE] = { TLV_TYPE_FIXED, 2 }, [GSM0808_IE_DOWNLINK_DTX_FLAG] = { TLV_TYPE_TV }, [GSM0808_IE_INTERFERENCE_BAND_TO_USE] = { TLV_TYPE_TV }, [GSM0808_IE_CLASSMARK_INFORMATION_T2] = { TLV_TYPE_TLV }, [GSM0808_IE_GROUP_CALL_REFERENCE] = { TLV_TYPE_TLV }, [GSM0808_IE_TALKER_FLAG] = { TLV_TYPE_T }, [GSM0808_IE_CONFIG_EVO_INDI] = { TLV_TYPE_TV }, [GSM0808_IE_LSA_ACCESS_CTRL_SUPPR] = { TLV_TYPE_TV }, [GSM0808_IE_SERVICE_HANDOVER] = { TLV_TYPE_TLV }, [GSM0808_IE_ENCRYPTION_INFORMATION] = { TLV_TYPE_TLV }, [GSM0808_IE_CIPHER_RESPONSE_MODE] = { TLV_TYPE_TV }, [GSM0808_IE_CELL_IDENTIFIER] = { TLV_TYPE_TLV }, [GSM0808_IE_CHOSEN_CHANNEL] = { TLV_TYPE_TV }, [GSM0808_IE_LAYER_3_INFORMATION] = { TLV_TYPE_TLV }, [GSM0808_IE_LAYER_3_HEADER_INFORMATION] = { TLV_TYPE_TLV }, [GSM0808_IE_SPEECH_VERSION] = { TLV_TYPE_TV }, [GSM0808_IE_CHOSEN_ENCR_ALG] = { TLV_TYPE_TV }, }, }; const struct tlv_definition *gsm0808_att_tlvdef(void) { return &bss_att_tlvdef; } static const struct value_string gsm0808_msgt_names[] = { { BSS_MAP_MSG_ASSIGMENT_RQST, "ASSIGNMENT REQ" }, { BSS_MAP_MSG_ASSIGMENT_COMPLETE, "ASSIGNMENT COMPL" }, { BSS_MAP_MSG_ASSIGMENT_FAILURE, "ASSIGNMENT FAIL" }, { BSS_MAP_MSG_HANDOVER_RQST, "HANDOVER REQ" }, { BSS_MAP_MSG_HANDOVER_REQUIRED, "HANDOVER REQUIRED" }, { BSS_MAP_MSG_HANDOVER_RQST_ACKNOWLEDGE,"HANDOVER REQ ACK" }, { BSS_MAP_MSG_HANDOVER_CMD, "HANDOVER CMD" }, { BSS_MAP_MSG_HANDOVER_COMPLETE, "HANDOVER COMPLETE" }, { BSS_MAP_MSG_HANDOVER_SUCCEEDED, "HANDOVER SUCCESS" }, { BSS_MAP_MSG_HANDOVER_FAILURE, "HANDOVER FAILURE" }, { BSS_MAP_MSG_HANDOVER_PERFORMED, "HANDOVER PERFORMED" }, { BSS_MAP_MSG_HANDOVER_CANDIDATE_ENQUIRE, "HANDOVER CAND ENQ" }, { BSS_MAP_MSG_HANDOVER_CANDIDATE_RESPONSE, "HANDOVER CAND RESP" }, { BSS_MAP_MSG_HANDOVER_REQUIRED_REJECT, "HANDOVER REQ REJ" }, { BSS_MAP_MSG_HANDOVER_DETECT, "HANDOVER DETECT" }, { BSS_MAP_MSG_CLEAR_CMD, "CLEAR COMMAND" }, { BSS_MAP_MSG_CLEAR_COMPLETE, "CLEAR COMPLETE" }, { BSS_MAP_MSG_CLEAR_RQST, "CLEAR REQUEST" }, { BSS_MAP_MSG_SAPI_N_REJECT, "SAPI N REJECT" }, { BSS_MAP_MSG_CONFUSION, "CONFUSION" }, { BSS_MAP_MSG_SUSPEND, "SUSPEND" }, { BSS_MAP_MSG_RESUME, "RESUME" }, { BSS_MAP_MSG_CONNECTION_ORIENTED_INFORMATION, "CONN ORIENT INFO" }, { BSS_MAP_MSG_PERFORM_LOCATION_RQST, "PERFORM LOC REQ" }, { BSS_MAP_MSG_LSA_INFORMATION, "LSA INFORMATION" }, { BSS_MAP_MSG_PERFORM_LOCATION_RESPONSE, "PERFORM LOC RESP" }, { BSS_MAP_MSG_PERFORM_LOCATION_ABORT, "PERFORM LOC ABORT" }, { BSS_MAP_MSG_COMMON_ID, "COMMON ID" }, { BSS_MAP_MSG_RESET, "RESET" }, { BSS_MAP_MSG_RESET_ACKNOWLEDGE, "RESET ACK" }, { BSS_MAP_MSG_OVERLOAD, "OVERLOAD" }, { BSS_MAP_MSG_RESET_CIRCUIT, "RESET CIRCUIT" }, { BSS_MAP_MSG_RESET_CIRCUIT_ACKNOWLEDGE, "RESET CIRCUIT ACK" }, { BSS_MAP_MSG_MSC_INVOKE_TRACE, "MSC INVOKE TRACE" }, { BSS_MAP_MSG_BSS_INVOKE_TRACE, "BSS INVOKE TRACE" }, { BSS_MAP_MSG_CONNECTIONLESS_INFORMATION, "CONNLESS INFO" }, { BSS_MAP_MSG_BLOCK, "BLOCK" }, { BSS_MAP_MSG_BLOCKING_ACKNOWLEDGE, "BLOCK ACK" }, { BSS_MAP_MSG_UNBLOCK, "UNBLOCK" }, { BSS_MAP_MSG_UNBLOCKING_ACKNOWLEDGE, "UNBLOCK ACK" }, { BSS_MAP_MSG_CIRCUIT_GROUP_BLOCK, "CIRC GROUP BLOCK" }, { BSS_MAP_MSG_CIRCUIT_GROUP_BLOCKING_ACKNOWLEDGE, "CIRC GORUP BLOCK ACK" }, { BSS_MAP_MSG_CIRCUIT_GROUP_UNBLOCK, "CIRC GROUP UNBLOCK" }, { BSS_MAP_MSG_CIRCUIT_GROUP_UNBLOCKING_ACKNOWLEDGE, "CIRC GROUP UNBLOCK ACK" }, { BSS_MAP_MSG_UNEQUIPPED_CIRCUIT, "UNEQUIPPED CIRCUIT" }, { BSS_MAP_MSG_CHANGE_CIRCUIT, "CHANGE CIRCUIT" }, { BSS_MAP_MSG_CHANGE_CIRCUIT_ACKNOWLEDGE, "CHANGE CIRCUIT ACK" }, { BSS_MAP_MSG_RESOURCE_RQST, "RESOURCE REQ" }, { BSS_MAP_MSG_RESOURCE_INDICATION, "RESOURCE IND" }, { BSS_MAP_MSG_PAGING, "PAGING" }, { BSS_MAP_MSG_CIPHER_MODE_CMD, "CIPHER MODE CMD" }, { BSS_MAP_MSG_CLASSMARK_UPDATE, "CLASSMARK UPDATE" }, { BSS_MAP_MSG_CIPHER_MODE_COMPLETE, "CIPHER MODE COMPLETE" }, { BSS_MAP_MSG_QUEUING_INDICATION, "QUEUING INDICATION" }, { BSS_MAP_MSG_COMPLETE_LAYER_3, "COMPLETE LAYER 3" }, { BSS_MAP_MSG_CLASSMARK_RQST, "CLASSMARK REQ" }, { BSS_MAP_MSG_CIPHER_MODE_REJECT, "CIPHER MODE REJECT" }, { BSS_MAP_MSG_LOAD_INDICATION, "LOAD IND" }, /* FIXME: VGCS/VBS */ { 0, NULL } }; const char *gsm0808_bssmap_name(uint8_t msg_type) { return get_value_string(gsm0808_msgt_names, msg_type); } static const struct value_string gsm0808_bssap_names[] = { { BSSAP_MSG_BSS_MANAGEMENT, "MANAGEMENT" }, { BSSAP_MSG_DTAP, "DTAP" }, }; const char *gsm0808_bssap_name(uint8_t msg_type) { return get_value_string(gsm0808_bssap_names, msg_type); }