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|
"
(C) 2011-2014 by Holger Hans Peter Freyther
All Rights Reserved
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"
Object subclass: SIPUserAgentBase [
| transport name |
<category: 'OsmoSIP-Callagent'>
<comment: 'I am a user agent base'>
SIPUserAgentBase class >> createOn: aTransport [
<category: 'factory'>
^ self new
transport: aTransport;
yourself
]
SIPUserAgentBase class >> branchStart [
<category: 'ids'>
"magic marker..."
^ 'z9hG4bK'
]
SIPUserAgentBase class >> generateBranch [
| data |
data := '<1p>,<2p>' expandMacrosWithArguments:
{DateTime now asUTC asSeconds. Random between: 0 and: 99999}.
^ self branchStart, (SIPBase64 encode: data).
]
SIPUserAgentBase class >> generateCSeq [
<category: 'helper'>
"CSeq must be < 2^31 but Random only allows 2^29"
^ Random between: 1 and: (2 raisedTo: 29).
]
injectDefaults: aRequest [
aRequest addParameter: 'Max-Forwards' value: '70'.
aRequest addParameter: 'User-Agent' value: self name.
]
generateVia: aBranch [
<category: 'ids'>
^ (WriteStream on: String new)
nextPutAll: 'SIP/2.0/';
nextPutAll: transport type;
nextPutAll: ' ';
nextPutAll: transport address printString;
nextPutAll: ':';
nextPutAll: transport port asString;
nextPutAll: ';branch=';
nextPutAll: aBranch;
nextPutAll: ';rport';
contents.
]
name [
<category: 'accessing'>
^ name ifNil: ['OsmoST-SIP 0.34']
]
transport: aTransport [
transport ifNotNil: [transport handler: nil].
transport := aTransport.
transport handler: self.
]
transport [
<category: 'accessing'>
^ transport
]
queueData: aData dialog: aDialog [
| datagram |
<category: 'output'>
datagram := Sockets.Datagram
data: aData
address: (Sockets.SocketAddress
byName: aDialog destIp)
port: aDialog destPort.
transport queueDatagram: datagram.
]
]
|
