588 lines
16 KiB
Plaintext
588 lines
16 KiB
Plaintext
/* Encoding/Decoding routines for GSM System Information messages
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* according to 3GPP TS 44.018 Version 12.3.0 Release 12 */
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/* (C) 2017 by Harald Welte <laforge@gnumonks.org> */
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module GSM_Types {
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import from General_Types all;
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import from Osmocom_Types all;
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type integer GsmArfcn (0..1023);
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type integer UmtsArfcn (0..16383);
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type integer UmtsScramblingCode (0..511);
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const integer GsmMaxFrameNumber := 26*51*2048;
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type integer GsmFrameNumber (0..GsmMaxFrameNumber);
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type integer GsmRxLev (0..63);
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type integer GsmTsc (0..7) with { variant "FIELDLENGTH(8)" };
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type uint32_t GsmTmsi;
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/* Table 10.4.1 of Section 10.4 / 3GPP TS 44.018 */
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type enumerated RrMessageType {
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ADDITIONAL_ASSIGNMENT ('00111011'B),
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IMMEDIATE_ASSIGNMENT ('00111111'B),
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IMMEDIATE_ASSIGNMENT_EXTENDED ('00111001'B),
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IMMEDIATE_ASSIGNMENT_REJECT ('00111010'B),
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IMMEDIATE_PACKET_ASSIGNMENT ('01101001'B),
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CIPHERING_MODE_COMMAND ('00110101'B),
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CIPHERING_MODE_COMPLETE ('00110010'B),
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CONFIGURATION_CHANGE_COMMAND ('00110000'B),
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CONFIGURATION_CHANGE_ACK ('00110001'B),
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CONFIGURATION_CHANGE_REJECT ('00110011'B),
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ASSIGNMENT_COMMAND ('00101110'B),
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ASSIGNMENT_COMPLETE ('00101001'B),
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ASSIGNMENT_FAILURE ('00101111'B),
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HANDOVER_COMMAND ('00101011'B),
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HANDOVER_COMPLETE ('00101100'B),
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HANDOVER_FAILURE ('00101000'B),
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PHYSICAL_INFORMATION ('00101101'B),
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CHANNEL_RELEASE ('00001101'B),
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PARTIAL_RELEASE ('00001010'B),
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PARTIAL_RELEASE_COMPLETE ('00001111'B),
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PAGING_REQUEST_TYPE_1 ('00100001'B),
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PAGING_REQUEST_TYPE_2 ('00100010'B),
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PAGING_REQUEST_TYPE_3 ('00100100'B),
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PAGING_RESPONSE ('00100111'B),
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NOTIFICATION_NCH ('00100000'B),
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NOTIFICATION_RESPOSNE ('00100110'B),
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SYSTEM_INFORMATION_TYPE_8 ('00011000'B),
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SYSTEM_INFORMATION_TYPE_1 ('00011001'B),
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SYSTEM_INFORMATION_TYPE_2 ('00011010'B),
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SYSTEM_INFORMATION_TYPE_3 ('00011011'B),
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SYSTEM_INFORMATION_TYPE_4 ('00011100'B),
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SYSTEM_INFORMATION_TYPE_5 ('00011101'B),
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SYSTEM_INFORMATION_TYPE_6 ('00011110'B),
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SYSTEM_INFORMATION_TYPE_7 ('00011111'B),
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SYSTEM_INFORMATION_TYPE_2bis ('00000010'B),
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SYSTEM_INFORMATION_TYPE_2ter ('00000011'B),
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SYSTEM_INFORMATION_TYPE_2quater ('00000111'B),
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SYSTEM_INFORMATION_TYPE_5bis ('00000101'B),
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SYSTEM_INFORMATION_TYPE_5ter ('00000110'B),
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SYSTEM_INFORMATION_TYPE_9 ('00000100'B),
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SYSTEM_INFORMATION_TYPE_13 ('00000000'B),
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SYSTEM_INFORMATION_TYPE_16 ('00111101'B),
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SYSTEM_INFORMATION_TYPE_17 ('00111110'B),
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CHANNEL_MODE_MODIFY ('00010000'B),
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RR_STATUS ('00010010'B),
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CHANNEL_MODE_MODIFY_ACKNOWLEDGE ('00010111'B),
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FREQUENCY_REDEFINITION ('00010100'B),
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MEASUREMENT_REPORT ('00010101'B),
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CLASSMARK_CHANGE ('00010110'B),
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CLASSMARK_ENQUIRY ('00010011'B),
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EXTENDED_MEASUREMENT_REPORT ('00110110'B),
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EXTENDED_MEASUREMENT_ORDER ('00110111'B),
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GPRS_SUSPENSION_REQUEST ('00110100'B),
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//MBMS_ANNOUNCEMENT ('00010110'B), duplicate?
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//SERVICE_INFORMATION ('00110110'B), duplicate?
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APPLICATION_INFORMATION ('00111000'B),
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SYSTEM_INFORMATION_TYPE_14 ('00000001'B),
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SYSTEM_INFORMATION_TYPE_15 ('01000011'B),
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SYSTEM_INFORMATION_TYPE_18 ('01000000'B),
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SYSTEM_INFORMATION_TYPE_19 ('01000001'B),
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SYSTEM_INFORMATION_TYPE_20 ('01000010'B),
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SYSTEM_INFORMATION_TYPE_13alt ('01000100'B),
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SYSTEM_INFORMATION_TYPE_2n ('01000101'B),
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SYSTEM_INFORMATION_TYPE_21 ('01000110'B),
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SYSTEM_INFORMATION_TYPE_22 ('01000111'B),
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SYSTEM_INFORMATION_TYPE_23 ('01001111'B),
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DTM_ASSIGNMENT_FAILURE ('01001000'B),
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DTM_REJECT ('01001001'B),
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DTM_REQUEST ('01001010'B),
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PACKET_ASSIGNMENT ('01001011'B),
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DTM_ASSIGNMENT_COMMAND ('01001100'B),
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DTM_INFORMATION ('01001101'B),
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PACKET_INFORMATION ('01001110'B),
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UTRAN_CLASSMARK_CHANGE ('01100000'B),
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CDMA2000_CLASSMARK_CHANGE ('01100010'B),
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INTERSYS_TO_UTRAN_HO_CMD ('01100011'B),
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INTERSYS_TO_CDMA2000_HO_CMD ('01100100'B),
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GERAN_IU_MODE_CLASSMARK_CHG ('01100101'B),
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INTERSYS_TO_EUTRAN_HO_CMD ('01100110'B)
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} with { variant "FIELDLENGTH(8)" };
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type octetstring RestOctets with { variant "PADDING(yes), PADDING_PATTERN('00101011'B)" };
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type hexstring GsmBcdString with { variant "HEXORDER(low)" };
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type GsmBcdString BcdMccMnc with { variant "FIELDLENGTH(6)" };
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type record L2PseudoLength {
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uint6_t l2_plen,
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BIT2 zero_one
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} with { variant "" };
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template L2PseudoLength t_L2Pseudolength(template uint6_t len) := {
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l2_plen := len,
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zero_one := '01'B
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};
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type record RrHeader {
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L2PseudoLength l2_plen,
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uint4_t skip_indicator,
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uint4_t rr_protocol_discriminator,
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RrMessageType message_type
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} with { variant "" };
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template RrHeader t_RrHeader(RrMessageType msg_type, template uint6_t len) := {
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l2_plen := t_L2Pseudolength(len),
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skip_indicator := 0,
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rr_protocol_discriminator := 6,
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message_type := msg_type
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};
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type record RrL3Header {
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uint4_t skip_indicator,
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uint4_t rr_protocol_discriminator,
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RrMessageType message_type
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} with { variant "" };
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type record MaioHsn {
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} with { variant "" };
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/* TS 24.008 10.5.1.2 */
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type uint4_t CipheringKeySeqNr (0..7);
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/* 24.008 10.5.1.3 */
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type record LocationAreaIdentification {
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BcdMccMnc mcc_mnc,
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uint16_t lac
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} with { variant "" };
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/* TS 24.008 10.5.1.4 */
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type enumerated MobileIdentityType {
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MI_TYPE_NONE (0),
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MI_TYPE_IMSI,
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MI_TYPE_IMEI,
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MI_TYPE_IMEISV,
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MI_TYPE_TMSI,
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MI_TYPE_TMGI
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} with { variant "FIELDLENGTH(3)" };
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type record MobileIdentityBCD {
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MobileIdentityType mi_type (MI_TYPE_IMSI, MI_TYPE_IMEI, MI_TYPE_IMEISV),
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boolean odd,
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hexstring digits
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} with { variant "" };
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type record MobileIdentityTMSI {
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BIT4 pad ('1111'B),
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boolean odd (false),
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MobileIdentityType mi_type (MI_TYPE_TMSI),
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GsmTmsi tmsi
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} with { variant "" };
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type record MobileIdentityNone {
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BIT4 pad ('1111'B),
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boolean odd (false),
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MobileIdentityType mi_type (MI_TYPE_NONE)
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} with { variant "" };
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type union MobileIdentity {
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MobileIdentityBCD bcd,
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MobileIdentityTMSI tmsi,
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MobileIdentityNone unused
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} with { variant "TAG(bcd, mi_type = MI_TYPE_IMSI;
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bcd, mi_type = MI_TYPE_IMEI;
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bcd, mi_type = MI_TYPE_IMEISV;
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tmsi, mi_type = MI_TYPE_TMSI;
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unused, mi_type = MI_TYPE_NONE)" };
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type record MobileIdentityLV {
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uint8_t len,
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MobileIdentity mi
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} with { variant (len) "LENGTHTO(mi)" };
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type record MobileIdentityTLV {
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uint8_t tag,
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uint8_t len,
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MobileIdentity mi
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} with { variant (len) "LENGTHTO(mi)" };
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/* TS 24.008 10.5.1.5 */
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type record MsClassmark1 {
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BIT1 spare,
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uint2_t rev_level,
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boolean es_ind,
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boolean a51,
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uint3_t rf_pwr_cap
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} with { variant "" };
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/* TS 24.008 10.5.1.6 */
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type record MsClassmark2 {
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BIT1 spare,
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uint2_t rev_level,
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boolean es_ind,
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boolean a51,
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uint3_t rf_pwr_cap,
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BIT1 spare1,
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boolean ps_cap,
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uint2_t ss_screen_ind,
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boolean sm_cap,
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boolean vbs,
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boolean vgcs,
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boolean fc,
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boolean cm3,
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BIT1 spare2,
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boolean lcsva_cap,
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boolean ucs2,
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boolean solsa,
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boolean cmsp,
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boolean a53,
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boolean a52
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} with { variant "" };
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type record MsClassmark2LV {
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uint8_t len,
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MsClassmark2 cm2
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} with { variant (len) "LENGTHTO(cm2)" };
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/* 44.018 10.5.2.5 */
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type record ChannelDescription {
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RslChannelNr chan_nr,
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uint3_t tsc,
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boolean h,
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uint12_t arfcn optional,
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MaioHsn maio_hsn optional
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} with { variant (arfcn) "PRESENCE(h = false)"
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variant (maio_hsn) "PRESENCE(h = true)" };
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type record ChannelDescriptionTV {
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OCT1 iei,
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ChannelDescription v
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} with { variant "" };
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/* 10.5.2.8 */
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type enumerated ChannelNeeded {
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CHAN_NEED_ANY (0),
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CHAN_NEED_SDCCH (1),
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CHAN_NEED_TCH_F (2),
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CHAN_NEED_TCH_H (3)
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} with { variant "FIELDLENGTH(2)" };
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type record ChannelNeeded12 {
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ChannelNeeded second,
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ChannelNeeded first
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} with { variant "" };
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/* 10.5.2.21 */
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type record MobileAllocation {
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uint8_t len,
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bitstring ma
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} with { variant (len) "LENGTHTO(ma)" };
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/* 10.5.2.25a */
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type OCT3 PacketChannelDescription;
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/* 10.5.2.25b */
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type record DedicatedModeOrTbf {
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BIT1 spare,
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boolean tma,
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boolean downlink,
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boolean tbf
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} with { variant "" };
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/* 10.5.2.26 */
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type enumerated PageMode {
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PAGE_MODE_NORMAL,
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PAGE_MODE_EXTENDED,
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PAGE_MODE_REORGANIZATION,
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PAGE_MODE_SAME_AS_BEFORE
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} with { variant "FIELDLENGTH(4)" };
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/* 10.5.2.30 */
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type record RequestReference {
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bitstring ra length(8),
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uint5_t t1p,
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uint6_t t3,
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uint5_t t2
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} with { variant "" };
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template RequestReference t_RequestReference(template bitstring ra, template uint5_t t1p, template uint6_t t3, template uint5_t t2) := {
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ra := ra,
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t1p := t1p,
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t3 := t3,
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t2 := t2
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}
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/* compute the expected request reference for given RA + FN */
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function f_compute_ReqRef(uint8_t ra, GsmFrameNumber fn) return RequestReference {
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var RequestReference req_ref := { ra := int2bit(ra, 8) };
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req_ref.t1p := (fn / 1326) mod 32;
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req_ref.t2 := fn mod 26;
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req_ref.t3 := fn mod 51;
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return req_ref
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}
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/* 10.5.2.40 */
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type integer TimingAdvance (0..219);
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/* 10.5.2.43 */
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type uint8_t WaitIndication;
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/* 10.5.2.76 */
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type record FeatureIndicator {
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BIT2 spare,
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boolean cs_ir,
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boolean ps_ir
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} with { variant "" };
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/* 9.1.18 */
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type record ImmediateAssignment {
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DedicatedModeOrTbf ded_or_tbf,
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PageMode page_mode,
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ChannelDescription chan_desc optional,
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PacketChannelDescription pkt_chan_desc optional,
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RequestReference req_ref,
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TimingAdvance timing_advance,
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MobileAllocation mobile_allocation
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} with { variant (chan_desc) "PRESENCE(ded_or_tbf.tbf = false)"
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variant (pkt_chan_desc) "PRESENCE(ded_or_tbf.tbf = true)" };
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/* 9.1.20 */
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type record ReqRefWaitInd {
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RequestReference req_ref,
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WaitIndication wait_ind
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} with { variant "" };
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type record length(4) of ReqRefWaitInd ReqRefWaitInd4;
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type record ImmediateAssignmentReject {
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FeatureIndicator feature_ind,
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PageMode page_mode,
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ReqRefWaitInd4 payload
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} with { variant "" };
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/* 9.1.22 */
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type record PagingRequestType1 {
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ChannelNeeded12 chan_needed,
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PageMode page_mode,
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MobileIdentityLV mi1,
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MobileIdentityTLV mi2 optional,
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RestOctets rest_octets
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} with { variant "TAG(mi2, tag = 23)" };
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/* 9.1.23 */
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type record PagingRequestType2 {
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ChannelNeeded12 chan_needed,
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PageMode page_mode,
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GsmTmsi mi1,
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GsmTmsi mi2,
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MobileIdentityTLV mi3 optional,
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RestOctets rest_octets
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} with { variant "TAG(mi3, tag = 23)" };
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/* 9.1.24 */
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type record length(4) of GsmTmsi GsmTmsi4;
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type record PagingRequestType3 {
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ChannelNeeded12 chan_needed,
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PageMode page_mode,
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GsmTmsi4 mi,
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RestOctets rest_octets
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} with { variant "" };
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type union RrUnion {
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/*
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SystemInformationType1 si1,
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SystemInformationType2 si2,
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SystemInformationType2bis si2bis,
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SystemInformationType2ter si2ter,
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SystemInformationType3 si3,
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SystemInformationType4 si4,
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SystemInformationType5 si5,
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SystemInformationType5bis si5bis,
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SystemInformationType5ter si5ter,
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SystemInformationType6 si6,
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*/
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ImmediateAssignment imm_ass,
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ImmediateAssignmentReject imm_ass_rej,
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PagingRequestType1 pag_req_1,
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PagingRequestType2 pag_req_2,
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PagingRequestType3 pag_req_3,
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octetstring other
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} with { variant "" };
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/* Special RR Message on BCCH / CCCH Dowlink */
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type record GsmRrMessage {
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RrHeader header,
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RrUnion payload
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} with { variant (payload) "CROSSTAG(
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/*
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si1, header.message_type = SYSTEM_INFORMATION_TYPE_1;
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si2, header.message_type = SYSTEM_INFORMATION_TYPE_2;
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si2bis, header.message_type = SYSTEM_INFORMATION_TYPE_2bis;
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si2ter, header.message_type = SYSTEM_INFORMATION_TYPE_2ter;
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si3, header.message_type = SYSTEM_INFORMATION_TYPE_3;
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si4, header.message_type = SYSTEM_INFORMATION_TYPE_4;
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si5, header.message_type = SYSTEM_INFORMATION_TYPE_5;
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si5bis, header.message_type = SYSTEM_INFORMATION_TYPE_5bis;
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si5ter, header.message_type = SYSTEM_INFORMATION_TYPE_5ter;
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si6, header.message_type = SYSTEM_INFORMATION_TYPE_6;
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*/
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imm_ass, header.message_type = IMMEDIATE_ASSIGNMENT;
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imm_ass_rej, header.message_type = IMMEDIATE_ASSIGNMENT_REJECT;
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pag_req_1, header.message_type = PAGING_REQUEST_TYPE_1;
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pag_req_2, header.message_type = PAGING_REQUEST_TYPE_2;
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pag_req_3, header.message_type = PAGING_REQUEST_TYPE_3;
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other, OTHERWISE;
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)" };
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external function enc_GsmRrMessage(in GsmRrMessage msg) return octetstring
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with { extension "prototype(convert) encode(RAW)" };
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external function dec_GsmRrMessage(in octetstring stream) return GsmRrMessage
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with { extension "prototype(convert) decode(RAW)" };
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/* Normal L3 Message on Dedicated Channel */
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/* 9.1.25 Paging Response */
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type record PagingResponse {
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uint4_t spare_half_octet,
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CipheringKeySeqNr cksn,
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MsClassmark2LV cm2,
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MobileIdentityLV mi,
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uint8_t addl_upd_par optional
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} with { variant "" };
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type union RrL3Union {
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PagingResponse paging_response,
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octetstring other
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};
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type record GsmRrL3Message {
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RrL3Header header,
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RrL3Union payload
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} with { variant (payload) "CROSSTAG(
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paging_response, header.message_type = PAGING_RESPONSE;
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other, OTHERWISE;
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)" }
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/* TS 48.058 9.3.1 Channel Number IE */
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type enumerated RslChanNr0 {
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RSL_CHAN_NR_INVALID ('00'H),
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RSL_CHAN_NR_Bm_ACCH ('01'H),
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RSL_CHAN_NR_BCCH ('10'H),
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RSL_CHAN_NR_RACH ('11'H),
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RSL_CHAN_NR_PCH_AGCH ('12'H)
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} with { variant "FIELDLENGTH(5)" };
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type record RslChanNr2 {
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BIT4 tag ('0001'B),
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uint1_t sub_chan
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} with { variant "FIELDLENGTH(5)" };
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type record RslChanNr4 {
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BIT3 tag ('001'B),
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uint2_t sub_chan
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} with { variant "FIELDLENGTH(5)" };
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type record RslChanNr8 {
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BIT2 tag ('01'B),
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uint3_t sub_chan
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} with { variant "FIELDLENGTH(5)" };
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type union RslChanNrU {
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RslChanNr0 ch0,
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RslChanNr2 lm,
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RslChanNr4 sdcch4,
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RslChanNr8 sdcch8
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} with {
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variant "TAG(lm, tag = '0001'B;
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sdcch4, tag = '001'B;
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sdcch8, tag = '01'B;
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ch0, OTHERWISE)"
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variant "FIELDLENGTH(5)"
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};
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type record RslChannelNr {
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RslChanNrU u,
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uint3_t tn
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} with { variant "FIELDLENGTH(8)" };
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template RslChannelNr t_RslChanNr0(template uint3_t tn, template RslChanNr0 cht) := {
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u := { ch0 := cht },
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tn := tn
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}
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template RslChannelNr t_RslChanNr_RACH(template uint3_t tn) := t_RslChanNr0(tn, RSL_CHAN_NR_RACH);
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template RslChannelNr t_RslChanNr_BCCH(template uint3_t tn) := t_RslChanNr0(tn, RSL_CHAN_NR_BCCH);
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template RslChannelNr t_RslChanNr_PCH_AGCH(template uint3_t tn) := t_RslChanNr0(tn, RSL_CHAN_NR_PCH_AGCH);
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template RslChannelNr t_RslChanNr_Bm(template uint3_t tn) := t_RslChanNr0(tn, RSL_CHAN_NR_Bm_ACCH);
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template RslChannelNr t_RslChanNr_Lm(template uint3_t tn, uint1_t sub_slot) := {
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u := { lm := { tag := '0001'B, sub_chan := sub_slot } },
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tn := tn
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}
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template RslChannelNr t_RslChanNr_SDCCH4(template uint3_t tn, template uint2_t sub_slot) := {
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u := { sdcch4 := { tag := '001'B, sub_chan := sub_slot } },
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tn := tn
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}
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template RslChannelNr t_RslChanNr_SDCCH8(template uint3_t tn, template uint3_t sub_slot) := {
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u := { sdcch8 := { tag := '01'B, sub_chan := sub_slot } },
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tn := tn
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}
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/* TS 48.058 9.3.2 Link ID */
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type enumerated RslLinkIdC {
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FACCH_SDCCH (0),
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SACCH (1)
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} with { variant "FIELDLENGTH(2)" };
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type enumerated RslSapi0Prio {
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|
SAPI0_PRIO_NORMAL (0),
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|
SAPI0_PRIO_HIGH (1),
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|
SAPI0_PRIO_LOW (2)
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|
} with { variant "FIELDLENGTH(2)" };
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type uint3_t GsmSapi;
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type record RslLinkId {
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RslLinkIdC c,
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|
boolean na,
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|
RslSapi0Prio prio,
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|
GsmSapi sapi
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|
} with { variant "" };
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|
|
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template RslLinkId tr_RslLinkId := {
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|
c := ?,
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|
na := ?,
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|
prio := ?,
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|
sapi := ?
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|
};
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template RslLinkId tr_RslLinkID_DCCH(template GsmSapi sapi) modifies tr_RslLinkId := {
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|
c := FACCH_SDCCH,
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|
na := false,
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|
sapi := sapi
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|
};
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|
|
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template RslLinkId tr_RslLinkID_SACCH(template GsmSapi sapi) modifies tr_RslLinkId := {
|
|
c := SACCH,
|
|
na := false,
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|
sapi := sapi
|
|
};
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|
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template RslLinkId ts_RslLinkID_DCCH(GsmSapi sapi) := {
|
|
c := FACCH_SDCCH,
|
|
na := false,
|
|
prio := SAPI0_PRIO_NORMAL,
|
|
sapi := sapi
|
|
};
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|
|
|
template RslLinkId ts_RslLinkID_SACCH(GsmSapi sapi) := {
|
|
c := SACCH,
|
|
na := false,
|
|
prio := SAPI0_PRIO_NORMAL,
|
|
sapi := sapi
|
|
};
|
|
|
|
} with { encode "RAW"; variant "FIELDORDER(msb)" }
|