423 lines
11 KiB
Smalltalk
423 lines
11 KiB
Smalltalk
"
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(C) 2010-2011 by Holger Hans Peter Freyther
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All Rights Reserved
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"
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PackageLoader fileInPackage: #OsmoASN1.
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Object subclass: GSMDriver [
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| sccp proc sapis completeSem phoneConfig |
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<category: 'osmo-gsm-operation'>
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<comment: 'I create a SCCP connection and handle stuff on it. In the base class
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I am just capable of handling BSSMAP Management and need to dispatch it to other
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classes.'>
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<import: OsmoGSM>
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GSMDriver class >> new [
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<category: 'private'>
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^ super new initialize; yourself
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]
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GSMDriver class >> initWith: aSCCPConnection sapi: aSapi on: aProc phone: aPhone[
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<category: 'creation'>
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^ self new
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sapi: aSapi on: aProc;
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sccp: aSCCPConnection;
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phone: aPhone;
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yourself
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]
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initialize [
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<category: 'private'>
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completeSem := Semaphore new.
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sapis := Dictionary new.
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]
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completeSem [
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^ completeSem
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]
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waitForCompletion [
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<category: 'accessing'>
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^ completeSem wait
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]
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waitWithTimeout: aTimeout [
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| delay |
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<category: 'accessing'>
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delay := Delay forSeconds: aTimeout.
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delay timedWaitOn: completeSem.
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]
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sapi: aSapi on: aProc [
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<category: 'manage'>
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sapis at: aSapi put: aProc.
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]
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phone: aPhone [
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<category: 'private'>
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phoneConfig := aPhone.
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]
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sccp: aSCCPConnection [
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sccp := aSCCPConnection
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]
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sendClearRequest [
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| clear |
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clear := IEMessage initWith: GSM0808Helper msgClearReq.
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clear addIe: (GSMCauseIE initWith: 0).
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sccp nextPutData: (BSSAPManagement initWith: clear).
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]
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run [
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| connected |
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<category: 'processing'>
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"Process all messages in a thread"
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connected := true.
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proc := [
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[
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[
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[true] whileTrue: [
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| msg |
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msg := sccp next.
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self dispatch: msg.
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].
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] on: SystemExceptions.EndOfStream do: [
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connected := false.
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'SCCP Connection is now disconnected' printNl.
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].
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] ensure: [
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connected ifTrue: [
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'SCCP Cleaning up connection' printNl.
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connected := false.
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self sendClearRequest.
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].
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completeSem signal.
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].
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] fork.
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]
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cleanUp [
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<category: 'protected'>
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]
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dispatchMan: aMsg [
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<category: 'private'>
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aMsg type = GSM0808Helper msgClear ifTrue: [
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| resp |
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resp := IEMessage initWith: GSM0808Helper msgClearComp.
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sccp nextPutData: (BSSAPManagement initWith: resp).
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^ true
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].
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aMsg type = GSM0808Helper msgCipherModeCmd ifTrue: [
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| resp |
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resp := IEMessage initWith: GSM0808Helper msgCipherModeCmpl.
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resp addIe: (GSM0808ChosenEncrIE initWith: 1).
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sccp nextPutData: (BSSAPManagement initWith: resp).
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self dispatchCMAccept.
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^ true
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].
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aMsg type = GSM0808Helper msgAssRequest ifTrue: [
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| resp |
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"Reply with a AMR halfrate statement"
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resp := IEMessage initWith: GSM0808Helper msgAssComplete.
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resp addIe: (GSM0808CauseIE initWith: 0).
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resp addIe: (GSM0808ChosenChannel initWith: 16r98).
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resp addIe: (GSM0808ChosenEncrIE initWith: 1).
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resp addIe: (GSM0808SpeechVerIE initWith: 16r25).
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sccp nextPutData: (BSSAPManagement initWith: resp).
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^ true
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].
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'Unhandled message' printNl.
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aMsg inspect.
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]
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auKey [
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^ phoneConfig auKeyByteArray.
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]
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imsi [
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^ phoneConfig imsi.
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]
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dispatchDTAP: aMsg sapi: aSapi [
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<category: 'private'>
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aMsg class messageType = GSM48MMMessage msgAuReq ifTrue: [
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| auth resp |
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auth := A3A8 COMP128_v3: self auKey rand: aMsg auth data.
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resp := GSM48AuthResp new.
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resp sres data: (auth copyFrom: 1 to: 4).
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sccp nextPutData: (BSSAPDTAP initWith: resp linkIdentifier: 0).
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^ true
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].
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aMsg class messageType = GSM48MMMessage msgCMAccept ifTrue: [
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self dispatchCMAccept.
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^ true
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].
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sapis at: aSapi ifPresent: [:handler |
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handler handleData: aMsg sapi: aSapi.
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].
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'Unhandled DTAP message' printNl.
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aMsg inspect.
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]
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dispatch: aMsg [
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<category: 'protected'>
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aMsg class msgType = BSSAPHelper msgManagemnt
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ifTrue: [
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self dispatchMan: aMsg data.
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]
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ifFalse: [
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self dispatchDTAP: aMsg data sapi: aMsg sapi.
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].
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aMsg inspect.
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]
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dispatchCMAccept [
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sapis do: [:each |
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each serviceAccepted.
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].
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]
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]
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Object subclass: ProcedureBase [
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| driver conn success |
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<import: OsmoGSM>
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ProcedureBase class >> initWith: aHandler phone: aPhone [
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^ self new
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createConnection: aHandler phone: aPhone;
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yourself
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]
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openConnection: aMsg sapi: aSapi phone: aPhone handler: aHandler [
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| msg bssap |
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msg := IEMessage initWith: GSM0808Helper msgComplL3.
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msg addIe: (GSMCellIdentifier initWith: 274 mnc: 8 lac: 4099 ci: 40000).
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msg addIe: (GSMLayer3Info initWith: aMsg).
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bssap := BSSAPManagement initWith: msg.
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conn := aHandler createConnection: bssap.
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driver := GSMDriver initWith: conn sapi: aSapi on: self phone: aPhone.
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'Created the driver' printNl.
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]
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run [
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driver run.
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]
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execute [
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driver run.
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driver waitForCompletion.
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]
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driver [
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^ driver
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]
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complete [
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^ driver completeSem signals > 0
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]
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success [
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^ success ifNil: [false]
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]
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success: aSuc [
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success := aSuc.
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]
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serviceAccepted [
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"TO BE implemented"
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]
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]
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ProcedureBase subclass: LUProcedure [
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createConnection: aHandler phone: aPhone [
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| lu |
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lu := GSM48LURequest new.
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lu mi imsi: aPhone imsi.
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'LU proc started' printNl.
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self openConnection: lu sapi: 0 phone: aPhone handler: aHandler.
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]
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name [
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^ 'Location Updating Procedure'
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]
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execute [
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super execute.
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self success
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ifTrue: [
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'LUAccept nicely succeeded.' printNl.
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]
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ifFalse: [
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'LURejected.' printNl.
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]
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]
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handleData: aMsg sapi: aSapi [
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aMsg class messageType = GSM48MMMessage msgLUAcc ifTrue: [
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self success: true.
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].
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]
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]
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ProcedureBase subclass: CallProcedure [
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| nr |
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CallProcedure class >> initWith: aConn phone: aPhone nr: aNr [
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^ (super initWith: aConn phone: aPhone)
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nr: aNr; yourself
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]
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nr: aNr [
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nr := (ByteArray with: 16r80), (GSMNumberDigits encodeFrom: aNr).
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]
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createConnection: aHandler phone: aPhone [
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| cm |
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cm := GSM48CMServiceReq new.
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cm mi imsi: aPhone imsi.
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cm keyAndType val: 16r21.
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self openConnection: cm sapi: 0 phone: aPhone handler: aHandler.
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]
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name [
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^ 'Call Procedure'
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]
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execute [
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super execute.
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self success
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ifTrue: [
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'Call got accepted on the way' printNl.
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]
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ifFalse: [
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'Call was never connected' printNl.
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].
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]
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serviceAccepted [
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| resp |
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'Accepted' printNl.
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resp := GSM48CCSetup new.
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resp bearer1OrDefault data: #(16r60 16r02 0 1 4 16r85) asByteArray.
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resp calledOrDefault data: nr.
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conn nextPutData: (BSSAPDTAP initWith: resp linkIdentifier: 0).
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]
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handleData: aMsg sapi: aSapi [
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aMsg class messageType = GSM48CCMessage msgConnect ifTrue: [
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| resp |
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resp := GSM48CCConnectAck new.
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conn nextPutData: (BSSAPDTAP initWith: resp linkIdentifier: 0).
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self success: true.
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].
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aMsg class messageType = GSM48CCMessage msgDisconnect ifTrue: [
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| resp |
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resp := GSM48CCRelease new.
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resp causeOrDefault data: #(16rE1 16r90) asByteArray.
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conn nextPutData: (BSSAPDTAP initWith: resp linkIdentifier: 0)
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].
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]
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]
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ProcedureBase subclass: USSDProcedure [
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| nr |
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<import: Osmo>
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USSDProcedure class >> initWith: aConn phone: aPhone nr: aNr [
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^ (super initWith: aConn phone: aPhone)
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nr: aNr; yourself
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]
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USSDProcedure class >> buildProcessUnstructReq: aNr [
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| req str |
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req := {BERTag fromTuple: #(2 true 1). OrderedCollection
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with: {BERTag integer. #(4).}
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with: {BERTag integer. #(59).}
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with: {BERTag fromTuple: #(0 true 16). OrderedCollection
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with: {BERTag octetString. #(15).}
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with: {BERTag octetString. aNr asUSSD7Bit.}.}.}.
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str := WriteStream on: (ByteArray new: 40).
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(DERTLVStream on: str) nextPut: req.
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^ str contents
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]
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nr: aNr [
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nr := aNr.
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]
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createConnection: aHandler phone: aPhone [
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| cm |
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cm := GSM48CMServiceReq new.
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cm mi imsi: aPhone imsi.
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cm keyAndType val: 8.
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self openConnection: cm sapi: 0 phone: aPhone handler: aHandler.
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]
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name [
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^ 'USSD Procedure'
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]
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serviceAccepted [
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| reg |
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reg := GSM48SSRegister new.
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reg facility data: (self class buildProcessUnstructReq: nr).
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reg ssVersionOrDefault data: #(0).
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conn nextPutData: (BSSAPDTAP initWith: reg linkIdentifier: 0).
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]
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handleData: aMsg sapi: aSapi [
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aMsg class messageType = GSM48SSMessage msgReleaseCompl ifTrue:[
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aMsg inspect.
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self success: true.
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]
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]
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]
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