한국어

소프트스위치

온누리070 플레이스토어 다운로드
    acrobits softphone
     온누리 070 카카오 프러스 친구추가온누리 070 카카오 프러스 친구추가친추
     카카오톡 채팅 상담 카카오톡 채팅 상담카톡
    
     라인상담
     라인으로 공유

     페북공유

   ◎위챗 : speedseoul


  
     PAYPAL
     
     PRICE
     

pixel.gif

    before pay call 0088 from app


https://voipmagazine.wordpress.com/2014/12/05/strict-and-loose-routing-of-sip-sequential-requests/


http://www.opensips.org/html/docs/modules/1.11.x/rr.html#loose-route-id


sequential-requests-routing1.png


1.5.1.  loose_route()

The function performs routing of SIP requests which contain a route set. The name is a little bit confusing, as this function also routes requests which are in the strict router format.

This function is usually used to route in-dialog requests (like ACK, BYE, reINVITE). Nevertheless also out-of-dialog requests can have a pre-loaded route set and my be routed with loose_route. It also takes care of translating between strict-routers and loose-router.

The loose_route() function analyzes the Route headers in the requests. If there is no Route header, the function returns FALSE and routing should be done exclusivly via RURI. If a Route header is found, the function returns TRUE and behaves as described in section 16.12 of RFC 3261. The only exception is for requests with preload Route headers (intial requests, carrying a Route header): if there is only one Route header indicating the local proxy, then the Route header is removed and the function returns FALSE.

If there is a Route header but other parsing errors occur ( like parsing the TO header to get the TAG ), the function also returns FALSE.

Make sure your loose_routing function can't be used by attackers to bypass proxy authorization.

The loose_routing topic is very complex. See the RFC3261 for more details (grep for route set is a good starting point in this comprehensive RFC).

This function can be used from REQUEST_ROUTE.

Example 1.6. loose_route usage

...
loose_route();
...





Strict Routing of SIP Sequential Requests

Sequential requests within a dialog (like ACK, BYE, reINVITE) must take the path determined by record-routing and represented by Route set. In other words strict routing exactly follows the path represented by the Route set. Each strict router on the routing path, will route the SIP message as following: Rewrite the Request-URI with the topmost Route header field value and forward the message to the new Request URI. The Request-URI always contains the URI of the next hop. The next hop can be another SIP router or destination user agent. Strict Routing is legacy approach. 

Loose Routing of SIP Sequential Requests

Sequential requests within a dialog should take the path determined by record-routing and represented by Route set. Loose routing of the sequential requests leaves the Request-URI and does not change it.

  • The sequential request has “To-tag” (i.e. belongs to a dialog) whereas the initial request does not have “To-tag” (does not belong to any dialog). The initial request (Method: INVITE, or SUBSCRIBE) creates the dialog.
  • The Request-URI of the sequential request contains the URI of the destination user agent (username@FQDN/IP) whereas the initial request has AOR (username@proxyDomain).
  • Taking a simple case where all routers on the routing path are loose routers and the user agents support loose routing (i.e. The user agent will not insert its URI (user@FQDN) in a Record-Route). According to this, we can say:

 The Request-URI of the sequential request will not be changed by any proxy at all because the one who is responsible for the resource associated with this Request-URI is the destination user agent. Whereas the Request-URI of the initial request will be changed once by the proxy which is responsible for the domain in the Request-URI.

 The last Route header field value will be for the last proxy in the routing path.

Upon this, the routing procedure will look like following:

sequential-requests-routing1.png?w=637&h=546

The Pre-loaded Route header field values (Route Set in an initial SIP Request) should not be allowed for security reasons.

Note: Transition from strict routing to loose routing would break the compatibility with the older user agents. Avoiding this problem adds lot of overhead and causes problems.

Routing Path (Route Set) in SIP Message

Assume a set of loose proxies {P1 -> P2 -> P3}.

The Route set which will be included in the SIP sequential requests , will look like this:

Route: <sip:p1.domain.com;lr>,<sip:p2.domain.com;lr>,<sip:p3.domain.com;lr>

lr parameter is added to indicate that the router is a loose router. If the SIP router is strict, then the URI will not have the lr parameter.

In the strict routing,the Request-URI is overwritten so we keep the destination user agent (the contact address) in an additional Route header field value.

OpenSIPS Route Processing

In OpenSIPS, I would like to mention two important functions in “rr” module:

  • The function loose_route() which used in routing SIP requests that contain Route Set. For example to route the sequential requests we call this function as following:

if (has_totag()){

loose_route()

 # route it out to whatever destination was set by loose_route()
# in $du (destination URI).
route(relay);

}

If Route set is not empty the loose_route() returns TRUE and the destination uri ($du) is set to the first Route header field value.

  • The function record_route() which used for building the routing path by adding Record-Route header field value upon passing each proxy in a way the initial request follows to reach the destination user agent.



List of Articles
번호 제목 글쓴이 날짜 조회 수
162 Opensips Gateway between SIP and SMPP messages admin 2019-02-19 297
161 smpp sms opensips admin 2019-02-19 279
160 Busy Lamp Field (BLF) feature on Opensips 2.4.0 with Zoiper configuration admin 2018-05-29 2022
159 Documentation -> Tutorials -> WebSocket Transport using OpenSIPS admin 2018-05-17 1910
158 List of SIP response codes admin 2017-12-20 3568
157 opensips/modules/event_routing/ Push Notification Call pickup admin 2017-12-20 3125
156 opensips push notification How to detail file admin 2017-12-20 3043
155 OpenSIPS routing logic admin 2017-12-12 3103
154 OpenSIPS example configuration admin 2017-12-12 3087
153 opensips log output admin 2017-12-11 3088
152 opensips complete configuration example admin 2017-12-10 3197
151 Opensips1.6 ebook detail configuration and SIP signal and NAT etc file admin 2017-12-10 3166
150 dictionary.opensips radius admin 2017-12-09 4126
149 what is record_route() in opensips ? admin 2017-12-09 4056
» what is loose_route() in opensips ? file admin 2017-12-09 4202
147 in opensips what is lookup(domain [, flags [, aor]]) admin 2017-12-09 4082
146 in opensips db_does_uri_exist() what is admin 2017-12-09 3918
145 in opensips what is has_totag() admin 2017-12-09 4090
144 opensips exec module admin 2017-12-08 4254
143 opensips push notification How to admin 2017-12-07 4059
142 OpenSIPS Module Interface admin 2017-12-07 4159
141 opensips configuration config explain easy basic 오픈쉽스 컨피그레이션 기본 설명 file admin 2017-12-07 4244
140 openssl 을 이용한 인증서 생성 절차를 정리한다. 개인키 CSR SSL 인증서 파일 생성 admin 2017-09-14 5333
139 Documentation -> Tutorials -> TLS opensips.cfg admin 2017-09-14 5104
138 Using TLS in OpenSIPS v2.2.x admin 2017-09-14 5095
137 opensips tls cfg admin 2017-09-14 5176
136 How to setup a Jabber / XMPP server on Debian 8 (jessie) using ejabberd admin 2017-09-13 5724
135 SIP to XMPP Gateway + SIP Presence Server opensips admin 2017-09-13 5047
134 OpenSIPS command line tricks admin 2017-09-13 5020
133 Fail2Ban Freeswitch How to secure admin 2017-09-12 5292
132 opensips.cfg. sample admin 2017-09-12 4981
131 Advanced SIP scenarios with Event-based-Routing admin 2017-09-11 5160
130 PUSH SERVER 푸시서버 안드로이드 애플 admin 2017-09-11 5624
129 오픈소스 (사내)메신저 서버 구축, 오픈 파이어(openfire) 설치방법과 세팅(리눅스 기준) admin 2017-09-09 13962
128 rtpengine config basic and opensips configuration and command admin 2017-09-06 5326
127 WebSocket Transport using OpenSIPS configuration 웹 소켓 컨피그레이션 기본 admin 2017-09-06 5153
126 OpenSIPS basic configuration script 기본 컨피그 admin 2017-09-05 5247
125 rtpengine install and config admin 2017-09-05 5229
124 Installing RTPEngine on Ubuntu 14.04 admin 2017-09-05 5332
123 compile only the textops module make modules=modules/textops modules admin 2017-09-05 5209
122 opensips command /sbin/opensipsctl detail admin 2017-09-04 5308
121 2017 08 31 opensips 2.32 install debian8.8 module install compile err modules admin 2017-09-04 5239
120 Build-Depends debian 8.8 opensips 2.3 admin 2017-09-04 5129
119 What is new in 2.3.0 opensips admin 2017-09-04 5956
118 ubuntu 安装配置opensips,rtpproxy,mediaproxy admin 2017-09-04 5493
117 How to install Mediaproxy 2.5.2 on CentOS 6 64 bit admin 2017-09-04 5707
116 Using TLS in OpenSIPS v2.2.x configuration admin 2017-09-04 5386
115 How to 2.3 download , OpenSIPS new apt repository. DEBs for Debian / Ubuntu admin 2017-09-02 5347
114 You can install CDRTool in the following ways: admin 2017-09-01 5639
113 How to Install OpenSIPS 2.1.2 Server on Ubuntu 15.04 admin 2017-09-01 5558
112 Opensips 2.32 download admin 2017-09-01 5332
111 OpenSIPS 2.3 install admin 2017-09-01 5665
110 JsSIP: The JavaScript SIP Library admin 2017-09-01 5593
109 WebSocket Transport using OpenSIPS admin 2017-09-01 5680
108 A2Billing and OpenSIPS – Part 1 admin 2017-08-29 5394
107 A2Billing and OpenSIPS – Part 2 admin 2017-08-29 5300
106 A2Billing and OpenSIPS – Part 3 admin 2017-08-29 5516
105 OpenSIPS 2.3 philosophy admin 2017-08-17 6046
104 The timeline for OpenSIPS 2.3 is admin 2017-08-17 6179
103 OpenSIPS Control Panel and Homer integration admin 2017-08-17 6233
102 Opensips sip capture re designed admin 2017-07-16 5680
101 WebRTC with OpenSIPS WebSocket is a protocol provides full-duplex admin 2015-04-04 10693
100 WebSocket Support in OpenSIPS 2.1 admin 2015-04-04 12041
99 OpenSIPS 2.1 (rc) is available, download now! admin 2015-03-22 10586
98 Service Provision Using Asterisk & OpenSIPS - AstriCon 2014 admin 2015-02-25 12412
97 SIP Signaling-Messages OpenSIPS Running On Multicore Server file admin 2014-11-02 19938
96 opensips.cfg for Asterisk admin 2014-10-20 22162
95 A2Billing and OpenSIPS config admin 2014-10-20 21494
94 Jitsi Videobridge meets WebRTC admin 2014-10-18 23164
93 A Survey of Open Source Products for Building a SIP Communication Platform admin 2014-10-18 21115
92 Script Function , Module Index v1.11 함수 모듈 opensips admin 2014-10-14 21311
91 Opensips TM module enables stateful processing of SIP transactions admin 2014-10-04 19016
90 kamailio.cfg configuration Example admin 2014-10-04 21283
89 opensips NAT Traversal Module admin 2014-10-02 20557
88 UAC Registrant Module admin 2014-09-28 22337
87 MediaProxy 2.3.x & OpenSIPS 1.5.x Integration admin 2014-08-24 21502
86 RTPPROXY Admin Guide admin 2014-08-24 21854
85 CANCEL MESSAGE not handled correctly admin 2014-08-23 21660
84 [Sipdroid] SIP data collection study tour admin 2014-08-23 22067
83 [OpenSIPS-Users] Opensips 1.10 NAT radius aaa admin 2014-08-23 22067
82 OpenSIPS Consultancy Pricing module install Server 판매 또는 설치및 컨설팅 가이드 admin 2014-08-23 21967
81 ICE: The ultimate way of beating NAT in SIP admin 2014-08-23 21608
80 Many OPENSIPS Configuration Examples This will Help you admin 2014-08-23 21267
79 Real-time Charging System for Telecom & ISP environments admin 2014-08-23 22021
78 OPENSIPS EBOOK admin 2014-08-21 22171
77 Opensips Documentation Function admin 2014-08-21 21858
76 Presence Tutorial OpenXCAP setup admin 2014-08-18 21454
75 Opensips Modules Documentation admin 2014-08-18 22128
74 A lightweight RPC library based on XML and HTTP admin 2014-08-18 21306
73 opensips Nat script with RTPPROXY - English Good perfect admin 2014-08-15 20110
72 OpenSIPS Control Panel (OCP) Installation Guide Good admin 2014-08-13 20325
71 Installation and configuration process record opensips opensips-cp admin 2014-08-13 46543
70 OpenSIPS as Homer Capture server admin 2014-08-13 19221
69 OpenSIPS , default script , Types of Routs , Routing in SIP, Video lecture admin 2014-08-13 21394
68 Configuracion de Kamailio 3.3 con NAT Traversal y XCAP. admin 2014-08-12 21869
67 Under RHEL6.5 install OpenSIPS 1.11.1 tls admin 2014-08-12 21165
66 OpenSIPS/OpenSER-a versatile SIP Server cfg admin 2014-08-11 22033
65 Kamailio Nat Traversal using RTPProxy admin 2014-08-11 21593
64 MediaProxy wiki page install configuration admin 2014-08-11 21648
63 오픈소스 (사내)메신저 서버 구축, 오픈 파이어(openfire) 설치방법과 세팅 admin 2014-08-11 40497
62 MediaProxy Installation Guide admin 2014-08-10 21158
61 RTPProxy 1.2.x Installation & Integration with OpenSIPS 1.5x admin 2014-08-10 22395
60 Opensips Installation, How to. Good guide wiki page admin 2014-08-10 19415
59 OpenSIPS Installation Notes admin 2014-08-09 18925
58 Installation and configuration process record opensips 1.9.1 admin 2014-08-09 32527
57 opensips 1.11.2 install Good Giide admin 2014-08-09 22495
56 fusionPBX install debian wheezy admin 2014-08-09 21353
55 opensips 1.11.2 install guide good 인스톨 가이드 admin 2014-08-09 21664
54 SigIMS IMS Platform admin 2014-05-24 21898
53 2013 2012년 분야별 최고의 오픈소스 소프트웨어 124선 admin 2014-04-05 26373
52 Video conference server OpenMCU-ru - Introduction admin 2014-04-01 24594
51 SIPSorcery admin 2014-03-18 22336
50 Ekiga (formely known as GnomeMeeting) is an open source SoftPhone admin 2014-03-12 22753
49 telepresence: Open Source SIP Telepresence/MCU admin 2014-03-12 47201
48 SIP PBX - OpenSIPS and Asterisk configuration admin 2014-03-12 35633
47 Conference Support in Kamailio (OpenSER) admin 2014-03-12 30022
46 OpenSIPS configuration for 2 or more FreeSWITCH installs admin 2014-03-12 20926
45 The Impact of TLS on SIP Server Performance file admin 2014-03-12 22364
44 book-opensips-101 / content / 3.2. SIP TLS Secure Calling.mediawiki admin 2014-03-12 21595
43 Where to check OpenSIPS does not start? admin 2014-03-09 21699
42 opensips-1.10.0_src.tar.gz experimental source code documentation admin 2014-03-09 22737
41 Kamailo OpenSIPs installation on Debian admin 2014-03-09 28484
40 Using the openSIPS Registrant Module admin 2014-03-09 23208
39 RTPproxy Frequentry Asked Questions (FAQ) ¶ admin 2014-03-07 21172
38 Building Telephony Systems with OpenSIPS 1.6 RTPProxy + OpenSIPS 1.7 admin 2014-03-07 22246
37 Installing RTPproxy Start RTPproxy in Bridged mode very good admin 2014-03-07 36079
36 OpenSIPS Control Panel (OCP) Installation Guide admin 2014-03-06 20915
35 OpenSIPS Control Panel install guide admin 2014-03-06 22154
34 rtpproxy Module admin 2014-03-06 22028
33 MediaProxy Installation Guide admin 2014-03-06 30419
32 How to install OpenSIPS on CentOS debian module add xcap admin 2014-03-06 22912
31 Problem with presence_xml module Opensips 1.9 admin 2014-03-06 22413
30 Building Telephony Systems with OpenSIPS 1.6 books file admin 2014-03-06 23429
29 Multimedia Service Platform admin 2014-03-06 21733
28 How to install OpenSIPS on CentOS Debian etc admin 2014-03-05 22520
27 Opensips Installation, How to. admin 2014-03-05 19209
26 100% CPU usage opensips admin 2014-03-05 21926
25 A2Billing and OpenSIPS admin 2014-03-04 23762
24 Opensips_1.9 install guide this is great I like this admin 2014-03-04 29246
23 Opensips install debian admin 2014-03-03 23049
22 Open Source VOIP applications, both clients and servers. admin 2013-11-20 23440
21 OfficeSIP Server is freeware VoIP, SIP server for Windows admin 2013-09-11 24646
20 My new toy: Bluebox-ng admin 2013-04-06 39043
19 Flooding Asterisk, Freeswitch and Kamailio with Metasploit admin 2013-04-06 41565
18 Asterisk Installation Asterisk Realtime configuration admin 2013-04-06 27530
17 The SIP Router Project admin 2013-04-06 26470
16 Kamailio :: A Quick Introduction admin 2013-04-06 24012
15 Welcome to the Smartvox Knowledgebase admin 2013-04-06 24315
14 Kamailio 3.3.x and Asterisk 10.7.0 Realtime Integration using Asterisk Database admin 2013-04-06 29235
13 OpenSIPS vs Asterisk admin 2013-04-06 72930