/*! \defgroup gsm0808 GSM 08.08 / 3GPP TS 48.008 A Interface * @{ * \file gsm0808.h */ /* * (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. * */ #pragma once #include "tlv.h" #include #include #include #include #include #define BSSMAP_MSG_SIZE 1024 #define BSSMAP_MSG_HEADROOM 512 struct sockaddr_storage; struct msgb; struct gsm0808_cell_id_list2; struct msgb *gsm0808_create_layer3(struct msgb *msg_l3, uint16_t nc, uint16_t cc, int lac, uint16_t _ci) OSMO_DEPRECATED("Use gsm0808_create_layer3_2() instead, to not lose leading zeros in the MNC"); struct msgb *gsm0808_create_layer3_aoip(const struct msgb *msg_l3, uint16_t nc, uint16_t cc, int lac, uint16_t _ci, const struct gsm0808_speech_codec_list *scl) OSMO_DEPRECATED("Use gsm0808_create_layer3_2() instead, to not lose leading zeros in the MNC"); struct msgb *gsm0808_create_layer3_2(const struct msgb *msg_l3, const struct osmo_cell_global_id *cell, const struct gsm0808_speech_codec_list *scl); struct msgb *gsm0808_create_reset(void); struct msgb *gsm0808_create_reset_ack(void); struct msgb *gsm0808_create_clear_command(uint8_t cause); struct msgb *gsm0808_create_clear_command2(uint8_t cause, bool csfb_ind); struct msgb *gsm0808_create_clear_complete(void); struct msgb *gsm0808_create_cipher(const struct gsm0808_encrypt_info *ei, const uint8_t *cipher_response_mode); struct msgb *gsm0808_create_cipher_complete(struct msgb *layer3, uint8_t alg_id); struct msgb *gsm0808_create_cipher_reject(enum gsm0808_cause cause); struct msgb *gsm0808_create_cipher_reject_ext(enum gsm0808_cause_class class, uint8_t ext); struct msgb *gsm0808_create_classmark_request(); struct msgb *gsm0808_create_classmark_update(const uint8_t *cm2, uint8_t cm2_len, const uint8_t *cm3, uint8_t cm3_len); struct msgb *gsm0808_create_sapi_reject(uint8_t link_id); struct msgb *gsm0808_create_ass(const struct gsm0808_channel_type *ct, const uint16_t *cic, const struct sockaddr_storage *ss, const struct gsm0808_speech_codec_list *scl, const uint32_t *ci); struct msgb *gsm0808_create_ass2(const struct gsm0808_channel_type *ct, const uint16_t *cic, const struct sockaddr_storage *ss, const struct gsm0808_speech_codec_list *scl, const uint32_t *ci, const uint8_t *kc, const struct osmo_lcls *lcls); struct msgb *gsm0808_create_ass_compl(uint8_t rr_cause, uint8_t chosen_channel, uint8_t encr_alg_id, uint8_t speech_mode, const struct sockaddr_storage *ss, const struct gsm0808_speech_codec *sc, const struct gsm0808_speech_codec_list *scl); struct msgb *gsm0808_create_ass_compl2(uint8_t rr_cause, uint8_t chosen_channel, uint8_t encr_alg_id, uint8_t speech_mode, const struct sockaddr_storage *ss, const struct gsm0808_speech_codec *sc, const struct gsm0808_speech_codec_list *scl, enum gsm0808_lcls_status lcls_bss_status); 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 *gsm0808_create_ass_fail(uint8_t cause, const uint8_t *rr_cause, const struct gsm0808_speech_codec_list *scl); struct msgb *gsm0808_create_assignment_failure(uint8_t cause, uint8_t *rr_cause); struct msgb *gsm0808_create_clear_rqst(uint8_t cause); struct msgb *gsm0808_create_paging2(const char *imsi, const uint32_t *tmsi, const struct gsm0808_cell_id_list2 *cil, const uint8_t *chan_needed); struct msgb *gsm0808_create_paging(const char *imsi, const uint32_t *tmsi, const struct gsm0808_cell_id_list *cil, const uint8_t *chan_needed) OSMO_DEPRECATED("use gsm0808_create_paging2 instead"); struct msgb *gsm0808_create_lcls_conn_ctrl(enum gsm0808_lcls_config config, enum gsm0808_lcls_control control); struct msgb *gsm0808_create_lcls_conn_ctrl_ack(enum gsm0808_lcls_status status); struct msgb *gsm0808_create_lcls_notification(enum gsm0808_lcls_status status, bool break_req); /*! 3GPP TS 48.008 §3.2.2.5.8 Old BSS to New BSS information */ struct gsm0808_old_bss_to_new_bss_info { bool extra_information_present; struct { bool prec; bool lcs; bool ue_prob; } extra_information; bool current_channel_type_2_present; struct { uint8_t mode; uint8_t field; } current_channel_type_2; /* more items are defined in the spec and may be added later */ bool more_items; /*< always set this to false */ }; /*! 3GPP TS 48.008 §3.2.1.9 HANDOVER REQUIRED */ struct gsm0808_handover_required { uint16_t cause; struct gsm0808_cell_id_list2 cil; bool current_channel_type_1_present; uint8_t current_channel_type_1; bool speech_version_used_present; enum gsm0808_permitted_speech speech_version_used; bool old_bss_to_new_bss_info_present; struct gsm0808_old_bss_to_new_bss_info old_bss_to_new_bss_info; /* more items are defined in the spec and may be added later */ bool more_items; /*< always set this to false */ }; struct msgb *gsm0808_create_handover_required(const struct gsm0808_handover_required *params); /*! 3GPP TS 48.008 §3.2.1.37 HANDOVER REQUIRED REJECT */ struct gsm0808_handover_required_reject { uint16_t cause; /* more items are defined in the spec and may be added later */ bool more_items; /*< always set this to false */ }; struct msgb *gsm0808_create_handover_required_reject(const struct gsm0808_handover_required_reject *params); /*! 3GPP TS 48.008 §3.2.1.8 HANDOVER REQUEST */ struct gsm0808_handover_request { struct gsm0808_channel_type channel_type; struct gsm0808_encrypt_info encryption_information; struct osmo_gsm48_classmark classmark_information; struct gsm0808_cell_id cell_identifier_serving; struct gsm0808_cell_id cell_identifier_target; enum gsm0808_cause cause; bool current_channel_type_1_present; uint8_t current_channel_type_1; enum gsm0808_permitted_speech speech_version_used; uint8_t chosen_encryption_algorithm_serving; /*! Pass either old_bss_to_new_bss_info or old_bss_to_new_bss_info_raw. */ bool old_bss_to_new_bss_info_present; struct gsm0808_old_bss_to_new_bss_info old_bss_to_new_bss_info; /*! To feed the Old BSS to New BSS Information IE unchanged from the Handover Required message without having to * decode it. Pass either old_bss_to_new_bss_info or old_bss_to_new_bss_info_raw. Omit the TL part. */ const uint8_t *old_bss_to_new_bss_info_raw; uint8_t old_bss_to_new_bss_info_raw_len; const char *imsi; const struct sockaddr_storage *aoip_transport_layer; const struct gsm0808_speech_codec_list *codec_list_msc_preferred; bool call_id_present; uint32_t call_id; const uint8_t *global_call_reference; uint8_t global_call_reference_len; /* more items are defined in the spec and may be added later */ bool more_items; /*!< always set this to false */ }; struct msgb *gsm0808_create_handover_request(const struct gsm0808_handover_request *params); struct msgb *gsm0808_create_handover_request_ack(const uint8_t *l3_info, uint8_t l3_info_len, uint8_t chosen_channel, uint8_t chosen_encr_alg, uint8_t chosen_speech_version); struct gsm0808_handover_request_ack { const uint8_t *l3_info; uint8_t l3_info_len; bool chosen_channel_present; uint8_t chosen_channel; /*! For A5/N set chosen_encr_alg = N+1, e.g. chosen_encr_alg = 1 means A5/0 (no encryption), 2 means A5/1, 4 * means A5/3. Set chosen_encr_alg = 0 to omit the Chosen Encryption Algorithm IE. */ uint8_t chosen_encr_alg; /* chosen_speech_version == 0 omits the IE */ enum gsm0808_permitted_speech chosen_speech_version; bool speech_codec_chosen_present; struct gsm0808_speech_codec speech_codec_chosen; const struct sockaddr_storage *aoip_transport_layer; /* more items are defined in the spec and may be added later */ bool more_items; /*!< always set this to false */ }; struct msgb *gsm0808_create_handover_request_ack2(const struct gsm0808_handover_request_ack *params); struct gsm0808_handover_command { const uint8_t *l3_info; uint8_t l3_info_len; struct gsm0808_cell_id cell_identifier; const uint8_t *new_bss_to_old_bss_info_raw; size_t new_bss_to_old_bss_info_raw_len; /* more items are defined in the spec and may be added later */ bool more_items; /*!< always set this to false */ }; struct msgb *gsm0808_create_handover_command(const struct gsm0808_handover_command *params); struct msgb *gsm0808_create_handover_detect(); struct msgb *gsm0808_create_handover_succeeded(); struct gsm0808_handover_complete { bool rr_cause_present; uint8_t rr_cause; bool speech_codec_chosen_present; struct gsm0808_speech_codec speech_codec_chosen; struct gsm0808_speech_codec_list codec_list_bss_supported; /*< omit when .len == 0 */ bool chosen_encr_alg_present; uint8_t chosen_encr_alg; bool chosen_channel_present; uint8_t chosen_channel; bool lcls_bss_status_present; enum gsm0808_lcls_status lcls_bss_status; /* more items are defined in the spec and may be added later */ bool more_items; /*< always set this to false */ }; struct msgb *gsm0808_create_handover_complete(const struct gsm0808_handover_complete *params); struct gsm0808_handover_failure { uint16_t cause; bool rr_cause_present; uint8_t rr_cause; struct gsm0808_speech_codec_list codec_list_bss_supported; /*< omit when .len == 0 */ /* more items are defined in the spec and may be added later */ bool more_items; /*< always set this to false */ }; struct msgb *gsm0808_create_handover_failure(const struct gsm0808_handover_failure *params); struct gsm0808_handover_performed { uint16_t cause; struct gsm0808_cell_id cell_id; bool chosen_channel_present; uint8_t chosen_channel; bool chosen_encr_alg_present; uint8_t chosen_encr_alg; bool speech_version_chosen_present; enum gsm0808_permitted_speech speech_version_chosen; bool speech_codec_chosen_present; struct gsm0808_speech_codec speech_codec_chosen; bool lcls_bss_status_present; enum gsm0808_lcls_status lcls_bss_status; /* more items are defined in the spec and may be added later */ bool more_items; /*< always set this to false */ }; struct msgb *gsm0808_create_handover_performed(const struct gsm0808_handover_performed *params); struct msgb *gsm0808_create_dtap(struct msgb *msg, uint8_t link_id); void gsm0808_prepend_dtap_header(struct msgb *msg, uint8_t link_id); const struct tlv_definition *gsm0808_att_tlvdef(void); /*! Parse BSSAP TLV structure using \ref tlv_parse */ #define osmo_bssap_tlv_parse(dec, buf, len) tlv_parse(dec, gsm0808_att_tlvdef(), buf, len, 0, 0) /*! Parse BSSAP TLV structure using \ref tlv_parse2 */ #define osmo_bssap_tlv_parse2(dec, dec_multiples, buf, len) \ tlv_parse2(dec, dec_multiples, gsm0808_att_tlvdef(), buf, len, 0, 0) const char *gsm0808_bssmap_name(uint8_t msg_type); const char *gsm0808_bssap_name(uint8_t msg_type); const char *gsm0808_cause_name(enum gsm0808_cause cause); const char *gsm0808_cause_class_name(enum gsm0808_cause_class class); extern const struct value_string gsm0808_lcls_config_names[]; extern const struct value_string gsm0808_lcls_control_names[]; extern const struct value_string gsm0808_lcls_status_names[]; static inline const char *gsm0808_lcls_config_name(enum gsm0808_lcls_config val) { return get_value_string(gsm0808_lcls_config_names, val); } static inline const char *gsm0808_lcls_control_name(enum gsm0808_lcls_control val) { return get_value_string(gsm0808_lcls_control_names, val); } static inline const char *gsm0808_lcls_status_name(enum gsm0808_lcls_status val) { return get_value_string(gsm0808_lcls_status_names, val); } /*! @} */