SIP Provision

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本文介绍了一种SIP终端自动配置(SIPProvision)方案。该方案通过SIP终端发送组播SUBSCRIBE消息，携带MAC地址等信息，由IPPBX监听并回复NOTIFY消息，包含配置文件下载URL。终端据此下载配置文件实现自动配置。

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SIPProvision说明文档

V1.0

SIP Provision方案简介

SIP终端上电启动之后自动向局域网发送组播SUBSCRIBE,并且带上自身MAC和其它设备信息,PBX监听到这个组播之后回复SIP终端,并且发生NOTIFY消息给终端,带上配置文件的下载地址URL,SIP终端获得这个地址之后向服务器进行配置文件的下载

SIP Provision具体配置

首先在IPPBX服务器上使能"Listen to sip.mcast.net ",并且将设备的MAC地址绑定到一个帐号上

这个组播地址为RFC3261中的规定地址:

aUA can be configured to use multicast. Multicast

registrationsare addressed to the well-known "all SIP servers"

multicastaddress "sip.mcast.net" (224.0.1.75 for IPv4)

话机设备启动之后会向局域网发送组播的SUBSCRIBE带上自己的MAC地址,厂商信息,设备型号,版本号,IPPBX监听到这个组播之后就回复NOTIFY消息,带上包含SettingsURL的消息体,然后终端会向服务器请求这个配置文件

Example:https://192.168.1.109:443/provisioning/snom320.htm.当电话设备收到这个文件,就会向IPPBX请求配置文件

消息流程

OverviewPlug & Play

Plug& Play (PnP)provides a proprietory method to enable "Auto Provisioning"on all snomVoIP phonesEXCEPTsnomm3,.By default (Parameter pnpconfig = on)the phones send SIP SUBSCRIBES messages to a multicast address. AnySIP server understanding that message may reply with a SIP NOTIFYmessage containing the Auto Provisioning Server URL where the phonescan request their configuration from.

SIPFlow

snom3x0/snom8xxphones send on boot-up a SIP SUBSCRIBE message to a multicastaddress:

Sentto udp:224.0.1.75:5060 at 24/12/2001 00:00:19:248 (448 bytes):

SUBSCRIBEsip:MAC%3a00135E874B49@intern.snom.de SIP/2.0

Via:SIP/2.0/UDP 192.168.10.67:5060;rport

From:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=658512961

To:<sip:MAC%3a00135E874B49@intern.snom.de>

Call-ID:1930770594@192.168.10.67

CSeq:1 SUBSCRIBE

Event:ua-profile;profile-type="device";vendor="OEM";model="OEM";version="7.1.19"

Expires:0

Accept:application/url

Contact:<sip:192.168.10.67:5060>

Content-Length:0

Ifany SIP application within one hop range understands this message aconfirmation is sent:

Receivedfrom udp:192.168.100.10:5060 at 24/12/2001 00:00:19:287 (480 bytes):

SIP/2.0200 OK

Via:SIP/2.0/UDP 192.168.10.67:5060;rport=5060

Record-Route:<sip:127.0.0.1;lr;transport=tcp;route-id=fb4fb92b7775c2a7>

Record-Route:<sip:192.168.100.10;lr;transport=UDP;route-id=fb4fb92b7775c2a7>

Contact:<sip:192.168.100.10;transport=TCP;handler=dum>

To:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=91955270

From:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=658512961

Call-ID:1930770594@192.168.10.67

CSeq:1 SUBSCRIBE

Expires:0

Content-Length:0

followedby a SIP NOTIFY message containing the Auto Provisioning URL"http://192.168.100.10/sipphone/sipphoneconfig.xml?mac={mac}":

Receivedfrom udp:192.168.100.10:5060 at 24/12/2001 00:00:19:293 (868 bytes):

NOTIFYsip:192.168.10.67:5060 SIP/2.0

Via:SIP/2.0/UDP192.168.100.10:5060;branch=z9hG4bK-d8754z-c3ea5f0e74462613-1---d8754z-;rport

Via:SIP/2.0/TCP127.0.0.1:5060;branch=z9hG4bK-d8754z-7ca96c30144f3e04-1---d8754z-;rport=40916

Max-Forwards:20

Record-Route:<sip:192.168.100.10;lr;route-id=e3470eb400e9c0a4>

Record-Route:<sip:127.0.0.1;lr;transport=TCP;route-id=e3470eb400e9c0a4>

Contact:<sip:192.168.100.10;transport=TCP;handler=dum>

To:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=658512961

From:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=91955270

Call-ID:1930770594@192.168.10.67

CSeq:3 NOTIFY

Content-Type:application/url

Subscription-State:terminated;reason=timeout

Event:ua-profile;profile-type="device";vendor="OEM";model="OEM";version="7.1.19"

Content-Length:59

http://192.168.100.10/sipphone/sipphoneconfig.xml?mac={mac}

Thephone accepts this message and confirms:

Sentto udp:192.168.100.10:5060 at 24/12/2001 00:00:19:315 (542 bytes):

SIP/2.0200 Ok

Via:SIP/2.0/UDP192.168.100.10:5060;branch=z9hG4bK-d8754z-c3ea5f0e74462613-1---d8754z-;rport=5060

Via:SIP/2.0/TCP127.0.0.1:5060;branch=z9hG4bK-d8754z-7ca96c30144f3e04-1---d8754z-;rport=40916

Record-Route:<sip:192.168.100.10;lr;route-id=e3470eb400e9c0a4>

Record-Route:<sip:127.0.0.1;lr;transport=TCP;route-id=e3470eb400e9c0a4>

From:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=91955270

To:<sip:MAC%3a00135E874B49@intern.snom.de>;tag=658512961

Call-ID:1930770594@192.168.10.67

CSeq:3 NOTIFY

Content-Length:0

TestTool

Ourdevelopment provides a tool (Python Script) which can be installed onany OS platform which is supported by Python.The script will reply to any phone within the network, so please testit thoroughly before applying it to a live environment.