99 lines
2.4 KiB
Smalltalk
99 lines
2.4 KiB
Smalltalk
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Object subclass: GSM0808IE [
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<comment: 'Base class of IEs for GSM0808'>
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]
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Object subclass: GSM0808Helper [
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GSM0808Helper class >> msgComplL3 [ ^ 16r57 ]
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GSM0808Helper class >> msgReset [ ^ 16r30 ]
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GSM0808Helper class >> msgResetAck [ ^ 16r31 ]
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GSM0808Helper class >> msgClear [ ^ 16r20 ]
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GSM0808Helper class >> msgClearComp [ ^ 16r21 ]
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]
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Object subclass: BCD [
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BCD class >> encode: aNumber [
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| col num |
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col := OrderedCollection new.
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num := aNumber.
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1 to: 3 do: [:each |
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col add: num \\ 10.
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num := num // 10.
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].
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^ col reverse asByteArray
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]
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]
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Object subclass: LAI [
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LAI class >> generateLAI: mcc mnc: mnc [
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| mcc_bcd mnc_bcd lai_0 lai_1 lai_2 |
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mcc_bcd := BCD encode: mcc.
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mnc_bcd := BCD encode: mnc.
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lai_0 := (mcc_bcd at: 1) bitOr: ((mcc_bcd at: 2) bitShift: 4).
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lai_1 := mcc_bcd at: 3.
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mnc > 99
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ifTrue: [
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lai_1 := lai_1 bitOr: ((mnc_bcd at: 3) bitShift: 4).
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lai_2 := (mnc_bcd at: 1) bitOr: ((mnc_bcd at: 2) bitShift: 4)
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]
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ifFalse: [
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lai_1 := lai_1 bitOr: (16rF bitShift: 4).
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lai_2 := (mnc_bcd at: 2) bitOr: ((mnc_bcd at: 3) bitShift: 4)
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].
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^ ByteArray with: lai_0 with: lai_1 with: lai_2
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]
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]
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GSM0808IE subclass: GSMCellIdentifier [
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| mcc mnc lac ci |
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GSMCellIdentifier class >> elementId [ ^ 5 ]
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GSMCellIdentifier class >> initWith: mcc mnc: mnc lac: lac ci: ci [
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^ (self new)
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mcc: mcc mnc: mnc lac: lac ci: ci;
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yourself
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]
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mcc: aMcc mnc: aMnc lac: aLac ci: aCi [
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mcc := aMcc.
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mnc := aMnc.
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lac := aLac.
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ci := aCi.
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]
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storeOn: aMsg [
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| lai |
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lai := LAI generateLAI: mcc mnc: mnc.
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aMsg putByte: self class elementId.
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aMsg putByte: 1 + lai size + 2 + 2.
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aMsg putByte: 0.
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aMsg putByteArray: lai.
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aMsg putLen16: lac.
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aMsg putLen16: ci.
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]
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]
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GSM0808IE subclass: GSMLayer3Info [
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| data |
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GSMLayer3Info class >> elementId [ ^ 23 ]
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GSMLayer3Info class >> initWith: data [
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^ (self new)
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data: data;
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yourself
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]
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data: aData [
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data := aData
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]
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storeOn: aMsg [
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aMsg putByte: self class elementId.
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aMsg putByte: data size.
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aMsg putByteArray: data.
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]
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]
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