Today the work encountered two devices between the SIP packet crawl and analysis, and then combined with the RFC3261 document description, recorded today understand.1.SIP Protocol:Detailed RFC documentation for SIP is visible: rfc3261Session initiation, which allows you to use Internet endpoints (user agents) to find participants and allow you to create a shareab
Today, I encountered the capture and analysis of the SIP packets between the two devices. Then, combined with the instructions in rfc3261 documents, I recorded what I understood today.
1. SIP protocol:The detailed RFC documentation for SIP can be found at: rfc3261Session Initiation (Session Initiation Protocol) allows the use of internet endpoints (User proxies
Introduction
1. About the SIP protocol
Currently, there are three basic communication protocols based on VOIP: H 323, SIP, and MGCP. The following describes the comparison between the H 323 protocol and the SIP protocol.
H.323 was proposed by ITU. It attempts to regard IP phones as well-known traditional phones, but the transmission mode is changed from circuit s
Create a list
If you are developing an application using the sip api, remember that this function is only supported in Versions later than Android (API level 9. In addition, not all devices running Versions later than Android (API level 9) provide SIP support.
Add the following permissions to your application list to use the SIP
1. Android. Permission. use_sip
2.
The use of the SIP protocol is not uncommon. With the popularity of the VoIP service, we also have a better understanding of the SIP protocol. Here we will focus on the advantages of SIP. In this case, we need to compare this advantage with other protocols.
Advantages of SIP:
Service providers can select standard compo
We also talked about the SIP Protocol and related SIP protocol stack. In this paper, we propose a software structure and design implementation scheme of the software telephone based on the SIP protocol. this solution is based on the embedded Windows CE platform. The middleware uses the Open-Source SIP protocol stack oS
SIP is an application control signaling protocol proposed by IETF. As the name implies, it is used to initiate a session. It can be used to create, modify, and end multimedia session processes attended by multiple participants. Participants can communicate with each other through multicast, unicast, or network connection.There are clients and servers in the SIP. A client is an application that establishes a
1.1.1. Route/record-route
? Record-route can be used:
-Ensures firewall proxy stays in Path
? A firewall proxy adds record-Route Header
-Clients and servers copy record-route and put in Route Header for all messages
Request Routing
Example: only proxy 3 remains in route
1. ua1 is being ucted to invite "SIP: ua2 @ proxy1"
2. The message shocould be sent to proxy 1
3. The message shocould be sent to proxy 2
4. The message shocould be sent to proxy
Http://www.cnblogs.com/lovers/articles/2624745.html
Background:A task is received to encapsulate the video SDK provided by a manufacturer and connect it to a unified video monitoring platform of a Power Grid Company. The interface protocol proposed by the platform shows the SIP and some interactive packets for the first time. Once again, I deeply feel the lack of knowledge ..... After two days, Google, forums, and blogs have all been used to
The registration process of SIP is easy to understand. First, I have a number, but if my number can be moved, how can the server find me? The SIP registration mechanism reports the location of the SIP terminal to the registration server. The registration server is only a logical role. It is not necessarily an independent physical entity. It can be the same physic
In the process of learning the SIP protocol, we need to be clear about a concept, that is, the concept of SIP relay. In order to help you better understand this aspect, we use a comparison between Chinese and English translations to help you understand this aspect. The specific information is as follows:
A sip Trunk is a logical connection between an ip pbx and a
I. background and functions of the SIP protocolSIP (Session Initiation Protocol) is developed to help provide advanced telephone services that span the internet. Internet telephone IP telephone) is evolving to a formal business telephone model, and SIP is an important member of the series of protocols to ensure the implementation of this evolution.SIP is part of the IETF standard process. It is built based
The business support environment mainly includes the application server, Business Management Server, and business generation environment. They work together to quickly complete the tasks that provide users with diverse and flexible value-added services based on the next generation network. The application server is the subject of the business support environment. The Business Management Server and business generation environment can be used as part of the application server.
Figure 2
Label: style blog HTTP Io color OS ar sp
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Category: Linux applications-open-source VoIP-Based on Osip-qutecom Brief Description: reprinted, please keep the link
NOTE: If any error occurs, please correct it. These are my Learning Log articles ......
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The SIP Session Initiation Protocol has been added in many systems. Therefore, we have summarized and summarized some problems of the SIP Session Initiation Protocol, hoping to help you solve some problems. For the sip faq, the Session Initiation Protocol SIP Servlet 1.0 support (JSR 116) was added for the first time i
The original link (also reproduced) http://blog.csdn.net/yetyongjin/article/details/6881491. I have modified some typos. SIPWhat kind of problems do you encounter from the private network to the public network? 1. Address translation of the package.2. SIP address translation inside SIP messages.3. The RTP address translation in the SDP in the SIP message.The exis
Chapter 3 SIP messages
SIP is a text-based protocol that uses the UTF-8 character set (rfc2279 ). A sip message can be a request sent from a client to a server, or a response sent from a server to a client.
Both requests (rfc3261 section 7.1) and responses (rfc3261 section 7.2) are in the format described in rfc2822. However, there are some differences between ch
What is VoIP?
The complete name of VoIP is voice over Internet protocol, which is translated as Internet voice. It can be simply understood as a technology that uses an Internet system instead of a traditional telephone communication system for voice calls. In fact, the biggest difference between the two is that traditional voice calls use analog signal technology, which is prone to interference and difficult to avoid signal distortion, the capacity of traditional analog signal communication tec
SIP: Session Initiation ProtocolDocument StatusThis document has developed an Internet standard tracking protocol for Internet communications that asks for discussion and elevation of recommendations. Please refer to the "Official Internet Protocol Standard" for the standardized status of this agreement. Forward Unlimited!Copyright noticeCopyright (c) Internet community (2002). All rights Reserved!ProfileThis document describes the Session Initiation
The previous article briefly analyzes the imsdroid project. This article continues the previous article. Continue to analyze the IMS Private Identity (IMPI) Identity authentication user id for example: banketreeIMS Public Identity (IMPU) Public authentication such as: sip: 33446677887@doubango.org service settings: [java] // Sets IP address final String proxyHost = "192.168.0.1"; mConfigurationService (ConfigurationEntry. NETWORK_PCSCF_HOST, proxyHost
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