the Sofia of FreeSWITCH kernel research
call flow involves content
1, received the nua_i_invite of a, returned 407, as follows:
Sofia_handle_sip_i_invite =>sofia_reg_handle_register => sofia_reg_auth_challenge => 407
2, received the nua_i_invite of a, returned 180, as follows:
Sofia_handle_sip_i_invite =>sofia_reg_handle_register => Sofia_reg_parse_auth
Processing Nua_i_state messagesSofia.c:sofia_handle_sip_i_state...Mod_dialplan_xml.c:dialplan_hunt (Ring_ready)Resolves the dialing scheme, exec
This digest from: http://blog.chinaunix.net/uid-20655530-id-1589483.htmlThe quickest way to learn the SIP protocol is to learn by example,Found a complete call flow, let's go!INVITEThe calling party Tesla First initiates the INVITE message to the called party Marconi. The INVITE message contains the session type and the parameters necessary for some calls. The session type may be simple speech, or it may b
Invite transaction:When using the UDP transmission protocol to transmit INVITE messages, you must use the hop-by-hop retransmission mechanism to ensure the final transmission of invite. That is, both the user agent UA and the SIP proxy must ensure that invite reach the next hop, when the next hop is received, a tempora
various ways described earlierList.3-4 guest list : If you can invite anyone to dinner (whether alive or dead),Who will you invite? Please create a list of at least 3 people you would like to invite; then, use thisList to print a message inviting these people to dinner with you.dinner = []dinner.append(‘zhangsan‘)dinner.append(‘lisi‘)dinner.append(‘wangwu‘)print
" link of the Group Voice invitation message in the text information display area of the QQ Group session window
Group Friends Voice Chat Open Group Voice after you will see the following image shows a pop-up voice session window, speak to the microphone can be in the group with the group is trying to voice the voice function of a group of friends to talk to.
The voice is being marked: The Voice session window of the group of Friends QQ head to the left of the green Sonic icon indicates t
"Original address: http://blog.greenl.ee/2011/09/04/rerouting-requests-ucma-application-mspl/"One of the most useful (and most confusing) things you can does with Microsoft SIP processing Language (MSPL) are change the Routing behaviour of Lync Server. There is a variety of reasons why is might want to does this, but the this post I want to discuss a specific case:reroutin G Calls to a UCMA application.Let's say, for purposes of illustration, that's a UCMA application that establishes a user end
state changesWhen the state changes, by switch_channel_set_running_state function to change the running_state,and executes the associated callback to notify it that the state has changed:Endpoint_interface->io_routines->state_runCaller status Change
Cs_new
Switch_core_session_run Initial state is cs_new
Cs_initSofia_handle_sip_i_stateCase Nua_callstate_received (Received invite request) modifies the state of the state machine: cs_ne
SIP (Session Initiation Protocol, conversational initial protocol) was developed to help provide advanced telephony services across the Internet. Internet telephony (IP telephony) is evolving into a formal business telephony model, and sip is an important part of the NGN (Next Generation Network) family of protocols needed to ensure this evolution. Support for the H + protocolSIP Learning Note 2007-12-28 21:39:23The quickest way to learn the SIP protocol is to learn by example,Found a complete c
converted to the "Confirmed" status after receiving the 2XX final response. If other or no response is received, the "early" dialog will be terminated.Section 1 create a dialog
Creates a dialog by constructing a non-Failed response to a request for a specific method. In this manual, only 2XX and 101-199 responses to invite requests will create a dialog. A dialog created for a non-final response to a request is in the "early" state and called an early
Call persistence process and call ProcessCall persistence FlowchartCall persistence signaling:
1) when user 1000 sends the re-INVITE message to IPBX, the call between 1000 and 1002 needs to be maintained. The Re-INVITE message carries c = IN IP4 0.0.0.0 in sdp, indicating that the re-INVITE message is a call persistence message.
Rfc3261 and rfc3262 define CSeq and rack respectively, but they often do not understand their meaning during the application process, leading to errors. The call-ID of the request must be set to the call-ID of the dialog.
Requests within a dialog must contain strictly monotonically
Increasing and contiguous CSeq sequence numbers (increasing-by-one)
In each direction (sort ting ack and cancel of course, whose numbers
Equal the requests being acknowledged or canceled). These are rfc3261 requiremen
between two ue, u1-> P1-> P2-> u2, and both proxies are willing to add record-route header fields. Message stream: [note] because we only care about the SIP routing mechanism here, the following headers irrelevant to the routing mechanism are omitted. U1 sends an invite request to p1 (P1 is the U1 outbound Proxy Server): Invite SIP: callee@domain.com Sip/2.0
Contact: SIP: caller@u1.example.com
P1 is not re
Translator: 9 times on the Lushan Road
The SIP method options allows one UA to query the capabilities of another UA or proxy server. This provides a client to query methods supported by the server, such as content types, extensions, and codecs. None of these require the "Ringing" peer. For example, when the client tries to add a request field option to the invite request header, it does not know whether the UAS of the other party can support this op
How do I make the app job?
Download an appliance top mobile phone application and experience, get the appropriate rewards
How does a dollar make money?
(1) Make the task to make money: Download the device top mobile phone application and experience, get the corresponding reward;
(2) Friends divided into rewards: Successfully invited a friend micro-letter login A dollar to earn, you and friends will immediately randomly get 0.2-1.5 yuan in cash, 7-level friends in the
-on-linux.html)
Install reference (http://docs.asp.net/en/1.0.0-beta7/getting-started/installing-on-mac.html) in Mac ).
In addition to fully cross-platform implementations, there are also the following changes and enhancements:
The dnx command is simplified. You do not need to enter the "point ".
You can use the previous app. config file when using the full version of. NET Framework.
Optimized MVC functions in Razor, ViewComponent, and TagHelper.
Changed the MVC startup code: https://github
Test instructions: N boxes with chocolates in the box, each time you can move the chocolate to the adjacent position box, ask the minimum number of moves, so that each box has a maximum of one chocolate.Idea: Build a picture that connects the chocolate that needs to move and the empty box between the edges.#include #include #include #include #include #include #include #include #include #include #include #include #define Lson (rt#define Rson (rt#define M ((l+r) >>1)#define CL (A, B) memset (A,b,s
of a [I] + B [J] is reduced. That is to say, it originally does not belong to an equal subgraph, And now it may have entered an equal subgraph, thus expanding the equal subgraph.
The problem now is to evaluate the value of D. To ensure that a [I] + B [J]> = W [I, j] is always valid, and at least one edge enters an equal subgraph, D should be equal:
Min {A [I] + B [J]-W [I, j] | Xi is in the staggered tree, Yi is not in the staggered tree }. The above is the basic idea of the KM algorithm. H
during the augmented process, all the labels of the Y vertices in the augmented orbit Add a constant D. Then, for any side (I, j, W) in the graph (I is the X vertices, and J is the y vertices):
(5) After the modification, the system continues to expand the DFS on the x-point. If the change fails, the modification continues until the modification is successful;
(6) The above is the basic idea of the KM algorithm. However, in a simple implementation method, the time co
: the timing requirement is not met,Measure: Double-click compilation report --> time analyzer --> red part (for example, clock setup: 'clk') --> left-click list path to view the fmax slack report and solve it as prompted, it may be Program Of Algorithm Problem14. can't achieve minimum setup and hold requirement along path (s). See report window for details.Cause: timing analysis finds that a certain number of paths violate the minimum setup and reten
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