GB28181流媒體web直播方案設備信息查詢信令分析

關於LiveGBS GB28181流媒體服務器的部署詳見https://www.liveqing.com/docs/download/LiveGBS.html。經過LiveGBS流媒體服務能夠實現GB28181接入攝像頭、硬盤錄像機、其餘支持GB28181的視頻平臺，實現網頁無插件直播。

以下是GB28181註冊成功後設備狀態查詢的信令分析：

一、發送設備信息查詢命令 （服務>> 設備）

MESSAGE sip:34020000001320000264@3402000000 SIP/2.0
Via: SIP/2.0/UDP 192.168.2.135:5060;rport;branch=z9hG4bK818290845
From: <sip:34020000002000000001@3402000000>;tag=23290845
To: <sip:34020000001320000264@3402000000>
Call-ID: 298290845
CSeq: 13 MESSAGE
Max-Forwards: 70
User-Agent: LiveQing
Content-Length: 165
Content-Type: Application/MANSCDP+xml

<?xml version="1.0" encoding="UTF-8"?>
<Query>
    <CmdType>DeviceInfo</CmdType>
    <SN>340290845</SN>
    <DeviceID>34020000001320000264</DeviceID>
</Query>

二、設備響應回覆 （設備>>服務）

SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.2.135:5060;rport=5060;branch=z9hG4bK818290845
From: <sip:34020000002000000001@3402000000>;tag=23290845
To: <sip:34020000001320000264@3402000000>;tag=334737784
Call-ID: 298290845
CSeq: 13 MESSAGE
User-Agent: IP Camera
Content-Length: 0

三、國標流媒體服務等待設備上傳設備信息（設備>>服務）

MESSAGE sip:34020000002000000001@3402000000 SIP/2.0
Via: SIP/2.0/UDP 192.168.2.64:5060;rport=5060;received=192.168.2.64;branch=z9hG4bK431546301
From: <sip:34020000001320000264@3402000000>;tag=1013752338
To: <sip:34020000002000000001@3402000000>
Call-ID: 358460854
CSeq: 20 MESSAGE
Content-Type: Application/MANSCDP+xml
Max-Forwards: 70
User-Agent: IP Camera
Content-Length: 307

<?xml version="1.0" encoding="UTF-8"?>
<Response>
<CmdType>DeviceInfo</CmdType>
<SN>340290845</SN>
<DeviceID>34020000001320000264</DeviceID>
<Result>OK</Result>
<DeviceName>IP CAMERA</DeviceName>
<Manufacturer>Hikvision</Manufacturer>
<Model>DS-2CD2T20FD-I3</Model>
<Firmware>V5.4.41</Firmware>
</Response>