164 lines
4.4 KiB
Plaintext
164 lines
4.4 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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type uint32_t GprsTlli;
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type hexstring GsmMcc length(3);
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type hexstring GsmMnc length(2 .. 3);
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type uint16_t GsmLac;
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type uint16_t GsmCellId;
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type enumerated GprsCodingScheme {
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CS1, CS2, CS3, CS4
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};
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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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/* TS 48.058 9.3.1 Channel Number IE */
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type enumerated RslChanNr0 {
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RSL_CHAN_NR_INVALID ('00000'B),
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RSL_CHAN_NR_Bm_ACCH ('00001'B),
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RSL_CHAN_NR_BCCH ('10000'B),
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RSL_CHAN_NR_RACH ('10001'B),
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RSL_CHAN_NR_PCH_AGCH ('10010'B),
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RSL_CHAN_NR_OSMO_PDCH ('11000'B)
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} with { variant "FIELDLENGTH(5)" variant "FIELDORDER(msb)" };
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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)" variant "FIELDORDER(msb)" };
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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)" variant "FIELDORDER(msb)" };
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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)" variant "FIELDORDER(msb)" };
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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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variant "FIELDORDER(msb)"
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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)" variant "FIELDORDER(msb)" };
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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_PDCH(template uint3_t tn) := t_RslChanNr0(tn, RSL_CHAN_NR_OSMO_PDCH);
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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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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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template RslLinkId tr_RslLinkID_SACCH(template GsmSapi sapi) modifies tr_RslLinkId := {
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c := SACCH,
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na := false,
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sapi := sapi
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};
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template (value) RslLinkId ts_RslLinkID_DCCH(GsmSapi sapi) := {
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c := FACCH_SDCCH,
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na := false,
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prio := SAPI0_PRIO_NORMAL,
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sapi := sapi
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};
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template (value) RslLinkId ts_RslLinkID_SACCH(GsmSapi sapi) := {
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c := SACCH,
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na := false,
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prio := SAPI0_PRIO_NORMAL,
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sapi := sapi
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};
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} with { encode "RAW"; variant "FIELDORDER(msb)" }
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