109 lines
2.9 KiB
Smalltalk
109 lines
2.9 KiB
Smalltalk
"
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(C) 2010-2012 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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Object subclass: IPAProtoHandler [
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| token muxer |
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<comment: 'I can be registered on an IPADispatcher and will
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handle the IPA protocol. You can subclass me to change the
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behavior.'>
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<category: 'OsmoNetwork-IPA'>
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IPAProtoHandler class [
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| handlers |
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initialize [
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<category: 'creation'>
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^ self initializeHandlers
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]
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]
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IPAProtoHandler class >> initializeHandlers [
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<category: 'private'>
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(handlers := Dictionary new)
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at: IPAConstants msgPing put: #handlePing:;
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at: IPAConstants msgPong put: #handlePong:;
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at: IPAConstants msgIdGet put: #handleIdGet:;
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at: IPAConstants msgIdAck put: #handleIdAck:.
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]
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IPAProtoHandler class >> handlers [
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^ handlers ifNil: [self initialize. handlers].
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]
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registerOn: aDispatcher [
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<category: 'initialize'>
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aDispatcher addHandler: IPAConstants protocolIPA on: self with: #handleMsg:.
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]
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muxer: aMuxer [
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<category: 'initialize'>
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muxer := aMuxer.
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]
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token: aToken [
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<category: 'authentication'>
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token := aToken.
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]
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handleMsg: aMsg [
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| selector |
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<category: 'dispatch'>
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selector := self class handlers at: (aMsg first asInteger) ifAbsent: [
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self logError: 'IPA message not understood ', aMsg first asInteger asString
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area: #ipa.
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^ false
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].
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self perform: selector with: aMsg.
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]
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handlePing: aMsg [
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<category: 'private'>
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muxer nextPut: (ByteArray with: IPAConstants msgPong) with: IPAConstants protocolIPA.
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]
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handlePong: aMsg [
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<category: 'private'>
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self logDebug: 'PONG' area: #ipa.
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]
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handleIdGet: aMsg [
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| msg |
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<category: 'authentication'>
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msg := MessageBuffer new.
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msg putByte: IPAConstants msgIdResp.
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msg putLen16: token size + 1.
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msg putByte: IPAConstants idtagUnitName.
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msg putByteArray: token asByteArray.
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muxer nextPut: msg asByteArray with: IPAConstants protocolIPA.
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]
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handleIdAck: aMsg [
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<category: 'private'>
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self logDebug: 'ID ACK' area: #ipa.
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]
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]
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Eval [
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IPAProtoHandler initialize.
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]
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