WO2019223167A1

WO2019223167A1 - Method, apparatus and device for obtaining sip server address and storage medium

Info

Publication number: WO2019223167A1
Application number: PCT/CN2018/104134
Authority: WO
Inventors: 刘丹; 蒋辉
Original assignee: 平安科技（深圳）有限公司
Priority date: 2018-05-21
Filing date: 2018-09-05
Publication date: 2019-11-28
Also published as: CN108712516A; CN108712516B

Abstract

The present application relates to a method, apparatus and device for obtaining a SIP (Session Initiation Protocol) server address and a storage medium. The method comprises: receiving a SIP message initiated by a session; allocating a SIP server of a user associated with the SIP message; obtaining domain name information of an SIP server address according to the SIP server, obtaining a dynamic host configuration protocol (DHCP) message according to the SIP server, and carrying out binary string processing so as to obtain a needed domain name, and obtaining the domain name information set for obtaining the SIP server address; and initiating a domain name system (DNS) resolution request according to the domain name information to obtain the SIP server address. The described method and device can improve the reliability of a call service, reduce the access cost, decrease the cross-operator access, and improve the service efficiency.

Description

Method, device, equipment and storage medium for obtaining SIP server address

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on May 21, 2018, with application number 201810485588.2. And the invention name is "Method, Device, Equipment, and Storage Medium for Obtaining SIP Server Address". Citations are incorporated in this application.

Technical field

This application relates to communication technology, and in particular, to a method, an apparatus, a device, and a storage medium for obtaining a SIP server address.

Background technique

With the development of network and communication technology, the Internet phone (also known as VOIP phone) that directly dials each other's fixed or mobile phone via the Internet has been increasingly used by people for its stable call quality and low tariffs. Applied. When an existing call center provides voice channel services on the public network, it needs to access the operator's public network services. At present, BGP (Border Gateway Gateway) access is mainly used. BGP is an autonomous system routing running on TCP. protocol. BGP is a protocol used to handle networks like the size of the Internet, capable of handling multiple connections between unrelated routing domains. BGP is used to exchange routing information between different autonomous systems (AS). When two ASs need to exchange routing information, each AS must designate a node running BGP to exchange routing information with other ASs on behalf of the AS. This node can be a host. But usually routers perform BGP. The routers that use BGP to exchange information in the two ASs are also called Border Gateways or Border Routers. Or use telecommunications, China Unicom, mobile single network access methods, the operator will assign an IP address to the call center, the call center resolves the previously applied domain name to the IP address for users to dial in.

Therefore, the common defects in the prior art when calling are: the operator's network is abnormal, the service is stopped, and the reliability is poor; the cross-operator access takes a long time and the efficiency is low; and the BGP access method has a high cost.

Summary of the Invention

In view of this, it is necessary to provide a method, an apparatus, a device, and a storage medium for obtaining a SIP (Session Initiation Protocol) server address in view of the shortcomings of the prior art.

A method for obtaining a SIP server address includes:

A SIP protocol stack for receiving and sending SIP messages and parsing and encapsulating the SIP messages is set in advance on the SIP server. The SIP protocol stack is used for receiving and sending SIP messages and receiving SIP messages initiated by a session. The session is Internet phone signaling, complying with the session initiation protocol;

Assigning a SIP server of a user associated with the SIP message;

Obtaining a Dynamic Host Distribution Protocol DHCP message according to the SIP server, and performing binary string processing to obtain a required domain name, and obtaining domain name information for obtaining a SIP server address;

Initiate a DNS resolution request for the domain name system according to the domain name information, call the domain name query interface provided by the DNS module of the gateway device, and send a query message for the service location SRV record to the DNS server, and process the query message The response packet is obtained from the IP address of the required SIP server.

A device for obtaining a SIP server address includes:

The receiving unit is configured to set in advance a SIP protocol stack on the SIP server for receiving and sending SIP messages, and for parsing and encapsulating the SIP messages. The SIP protocol stack is used for receiving and sending SIP messages and receiving session initiated SIP messages. The session is internet phone signaling and complies with the session initiation protocol;

A determining unit configured to allocate a SIP server of a user associated with the SIP message;

The obtaining unit is configured to obtain a dynamic host allocation protocol DHCP message according to the SIP server, and perform binary string processing to obtain a required domain name and obtain domain name information for obtaining a SIP server address;

The resolution unit is configured to initiate a DNS resolution request of the domain name system according to the domain name information, invoke a domain name query interface provided by a DNS module of the gateway device, and send a query message for a service location SRV record to the DNS server, and process the DNS server according to the The response message returned by the query message is used to obtain the IP address of the required SIP server.

A computer device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

Assigning a SIP server of a user associated with the SIP message;

Initiate a DNS resolution request for the domain name system according to the domain name information, call the domain name query interface provided by the DNS module of the gateway device, and send a query message for the service location SRV record to the DNS server, and process the query message returned by the DNS server according to the query message The response packet is obtained from the IP address of the required SIP server.

A storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute the following steps:

Assigning a SIP server of a user associated with the SIP message;

The foregoing method, device, device, and storage medium for obtaining a SIP server address are provided by a SIP server stack for receiving and sending SIP messages and parsing and encapsulating the SIP messages in advance on the SIP server. The SIP protocol stack is used for receiving And send a SIP message, receive a SIP message initiated by the session, the session is Internet telephone signaling, comply with the session initiation protocol, allocate a SIP server of the user associated with the SIP message, and assign the first identifier of the SIP server Stored in the home user server, inserting the second identifier of the SIP server into the message header of the SIP message, and receiving the second identifier of the SIP server in the intermediate network device before storing the first identifier; and In the intermediate network device, the second identifier of the SIP server is converted into the first identifier of the SIP server, wherein the first identifier of the SIP server is stored in the home user server, including the first identifier of the SIP server Upload from the intermediate network device to the home user server. According to the SIP server, obtain a dynamic host allocation protocol DHCP message, perform binary string processing to obtain a required domain name, obtain domain name information for obtaining a SIP server address, and initiate a domain name system DNS resolution request according to the domain name information, and call The domain name query interface provided by the DNS module of the gateway device sends a query message for the service location SRV record to the DNS server, and processes the response message returned by the DNS server according to the query message to obtain the required SIP server IP addresses improve the reliability of call services, reduce access costs, reduce access across carriers, and improve service efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the detailed description of the preferred embodiments below. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present application.

FIG. 1 is a flowchart of a method for obtaining a SIP server address provided in an embodiment; FIG.

2 is a flowchart of a method for storing a first identifier and inserting a second identifier according to an embodiment;

3 is a flowchart of a method for receiving one or more SIP messages according to an embodiment;

4 is a structural block diagram of a device for obtaining a SIP server address provided in an embodiment;

FIG. 5 is a structural block diagram of a determining unit provided in an embodiment.

Detailed ways

In order to make the purpose, technical solution, and advantages of the present application clearer, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "the" may include plural forms. It should be further understood that the word "comprising" used in the specification of the present application refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof.

As a better embodiment, as shown in FIG. 1, a method for obtaining a SIP server address includes the following steps:

In step S101, a SIP protocol stack for receiving and sending SIP messages and parsing and encapsulating the SIP messages is set on the SIP server in advance. The SIP protocol stack is used for receiving and sending SIP messages, and receiving SIP messages initiated by the session. It is said that the session is Internet telephone signaling and complies with the session initiation protocol;

SIP (Session Initialization Protocol) was developed to help provide advanced telephone services across the Internet. Internet telephony (IP telephony) is evolving to a formal business telephony model. SIP is an important member of the NGN (Next Generation Network) series of protocols needed to ensure this evolution. The Session Initiation Protocol (SIP) can be used to establish, modify, and terminate signaling transfer protocols for multimedia sessions (eg, multimedia phone calls) on a packet network, and to authenticate access to IMS-based services. The IMS core network may include various nodes configured to use SIP signaling to control and manage multimedia sessions of the IMS core network. Such nodes are referred to herein as "SIP servers".

Step S102: Allocate a user's SIP server associated with the SIP message;

The SIP message is associated with the call session. The SIP server receives the incoming SIP message from the originating node. The SIP server determines the routing key based on at least one header field in the incoming SIP message. The SIP server uses the routing key to identify the responsible key. User agent for the call session; sending the incoming SIP message to the identified user agent; creating the outgoing SIP message by the user agent, using the routing keyword to generate a header field in the outgoing SIP message, and sending the outgoing SIP message from the SIP server to the termination node. After receiving the SIP message, the SIP server determines whether the SIP message carries an associated session identifier. If not, the SIP message is processed according to the new session mode. If it is carried, the associated SIP message is found according to the associated session identifier. The session ID is a string used to identify each dial-in user's session during billing. The user dials in to a network device (such as an access server). The network device acts as a RADIUS client and generates a string to uniquely identify the dial-in user. Enter the user's session for server-side billing.

Step S103: Obtain a dynamic host allocation protocol DHCP message according to the SIP server, and perform binary string processing to obtain a required domain name, and obtain domain name information for obtaining a SIP server address;

According to the SIP server, obtain a dynamic host allocation protocol DHCP message, and perform binary string processing to obtain the required domain name, and obtain the domain name information used to obtain the SIP server address. The SIP server supports a domain name query function to the domain name server, and can quickly return a domain name query response. When the domain name information is processed, it is used to perform binary string processing according to the format to obtain the required domain name. The DNS module initiates a DNS request And when obtaining the address of the SIP server, it is used to call the domain name query interface provided by the DNS module to send a query message for the SRV record to the DNS server, and process the response message returned by the DNS server according to the query message, Obtain the IP address of the required SIP server from it.

Step S104: Initiate a DNS resolution request of the domain name system according to the domain name information, call the domain name query interface provided by the DNS module of the gateway device, and send a query message for the service location SRV record to the DNS server, and process the DNS server according to the query message. The returned response packet is obtained from the IP address of the required SIP server.

The DNS server is configured to receive a domain name resolution request message forwarded by the gateway, and a response message returned according to the domain name resolution request message, where the response message carries address information allocated by the DNS for accessing a network.

As shown in FIG. 2, in one embodiment, the SIP server that allocates users associated with SIP messages further includes the following steps:

Step S201: Store the first identifier of the SIP server in the home user server.

Step S202: Insert the second identifier of the SIP server into the message header of the SIP message.

The first identifier of the SIP server can be transmitted through the Diameter interface. For example, during the IMS registration process, the first identifier of the SIP server can be uploaded to the Home Subscriber Server through the Diameter interface, so that the HSS can store the first identifier of the SIP server in association with the user as an IMS registration. Part of the program. The second identifier of the SIP server may be transmitted through a SIP (ISC) interface. For example, during a user's wireless communication session, the second identifier of the SIP server may be inserted into the message header of the SIP request received at the SIP server to generate a modified SIP request, and the modified SIP request may be It is forwarded to the next node as part of the wireless communication session.

In one embodiment, the SIP server includes a serving call session control function node.

SIP server (CSCF) nodes in the form of call session control functions include an interrogating CSCF (I-CSCF) node and multiple serving CSCF (S-CSCF) nodes. IMS (IP Multimedia Subsystem) is an IP multimedia subsystem, which is a new type of multimedia service that can meet the needs of newer and more diversified multimedia services of current end customers. Call Session Control Function (CSCF) is the core part of IMS, which is mainly used for SIP session control based on packet switching. In IMS, CSCF is responsible for processing user multimedia sessions and can be regarded as a SIP server in the IETF architecture. According to their respective main functions, they are divided into proxy call session control function P.CSCF (Proxy CSCF), inquiry call session control function I-CSCF (Interrogation CSCF), and service call session control function S.CSCF (Serving CSCF), three Functions can be physically separate or independent.

As shown in FIG. 3, in one embodiment, the method further includes:

Step S301, receiving one or more SIP messages;

Receive one or more SIP messages, where the indication message or identifier in the SIP message carries service setting information, and the service setting information carries association rules.

In step S302, the first fully qualified domain name is retrieved from the home user server. The fully qualified domain name includes both the host name and the domain name where the host is located, which can accurately indicate where the host is, and dispatch the domain name into the distribution according to a preset scheduling policy. In the task queue, you can perform priority scheduling for domain names. The scheduling strategy assigns the weight of CPU time quota to each domain name queue. The thread selects the query domain name in the corresponding domain name queue according to the weight.

A fully qualified domain name (Fully Qualified Domain Name) carries both the host name and the name of the domain name. For example: if the host name is bigserver and the domain name is mycompany.com, then the FQDN is bigserver.mycompany.com. A fully qualified domain name can logically and accurately indicate where the host is. It can also be said that a fully qualified domain name is a complete representation of a host name. From the information contained in the fully qualified domain name, you can see where the host is in the domain name tree. The DNS resolution process first finds the local HOSTS table, and some directly use the definition in the table, but does not look up the DNS server set in the network connection for him to resolve. Retrieve the first fully qualified domain name from the home user server. The fully qualified domain name contains both the host name and the domain name where the host is located. It can accurately indicate where the host is, and dispatch the domain name into the distributed task queue according to a preset scheduling policy. In the domain name, priority scheduling can be performed. The scheduling strategy assigns the weight of the CPU time quota to each domain name queue, and the thread selects the query domain name in the corresponding domain name queue according to the weight.

Step S303: Use the first fully qualified domain name DNS server;

The first fully-qualified domain name DNS server retrieved by a policy such as CPU time quota. The full domain name is very useful in actual business. The email uses the full domain name as the recipient's email address, such as janicejones@acmecompany.com, where the recipient is janicejones, followed by the recipient name with the symbols @, @ Is the full domain name of the mail server, or the domain name of the company where the mail server is located, and finally the top-level domain name .com. .com means acmecompany is a business organization.

Step S304: Receive an empty response from the DNS server. The empty response indicates the failure of the SIP server, and re-register the user to allocate a new SIP server.

If the number carries a local policy in the QoR mode, the call is released and the user is migrated out through a specific failure reason code in the failure response returned to the serving network to which the calling terminal belongs, that is, the S-CSCF on the calling side; the main After receiving the failure response, the calling S-CSCF accesses the NPDB through the DNS or ENUM interface to obtain the NP data of the called terminal, and then uses the obtained NP data to reroute the call to the new service network of the called user terminal, that is, Second service network. If the number carries a local policy in the Call Dropback mode, the I-CSCF of the first service network accesses the NPDB through the DNS or ENUM interface to obtain the NP data of the called user terminal, then releases the call, and sends the call to the S on the calling side. -The failure response returned by the CSCF carries the acquired NP data. After receiving the failure response, the calling S-CSCF uses the NP data to reroute the call to the new service network of the called user.

For example, the user Xiao Zhang is registered and assigned an S-CSCF node. Any new SIP service (for example, a SIP request) received at the I-CSCF node causes the I-CSCF node to query the S for the user Xiao Zhang. -HSS of the identifier of the CSCF node, which returns the first identifier retrieved from the master database. The I-CSCF node may use the first identifier to query the IP address of the S-CSCF node corresponding to the first identifier by the DNS server along the signaling path. When a DNS query is received, the DNS server can access the service distribution server to determine that the S-CSCF node corresponding to the first identifier has been cancelled by the service distribution server. This causes the DNS server to return a "NULL" response along the signaling path. This indicates that the S-CSCF node has been cancelled, that is, it has failed. DNS queries and NULL responses take several milliseconds to complete. The receipt of the NULL response at the I-CSCF node causes the I-CSCF node to re-register the user Xiao Zhang by initiating a capability discovery for the initial S-CSCF node allocation process. In this way, different available S-CSCF nodes (such as S-CSCF nodes) can be assigned to the user Xiao Zhang to restore the user Xiao Zhang's session. In this example, a node failure was discovered through a DNS query, and the user's session could be recovered within milliseconds. In other embodiments, re-registration may involve a SIP conversation including a unique CALL-ID.

In one embodiment, before further storing the first identifier: receiving the second identifier of the SIP server in the intermediate network device; and in the intermediate network device, converting the second identifier of the SIP server into the The first identifier, wherein storing the first identifier of the SIP server in the home user server includes uploading the first identifier of the SIP server from the intermediate network device to the home user server.

The SIP service (eg, a node in the S-CSCF) identified by the first identifier may be uploaded to a home server (HSS). The home server is used to store the associated users (eg, user Zhang). The upload may be performed by the SIP server, or may be uploaded by the intermediate network device (for example, a proxy node) from the SIP server and converted to the first identifier to the HSS after receiving a different identifier. In some embodiments, as part of the IMS registration process, such as when a user experiences that an IMS-based service (eg, a telephone service) is being registered with the IMS network, an upload is performed. For example, a SCF message may be received in response to a message (e.g., such as SIP, REGISTER method, SIP INVITE, SIP, SUBSCRIBE method, or any other SIP method, any type of SIP request) CSCF node, determining a SIP server (e.g., S-CSCF node) Associated with the user (for example, user Xiao Zhang), and the I-CSCF node selects the SIP server to serve the user. This technical solution allows some of the advantages of the hierarchical structure to be combined to include the first identifier and the second as described above. The structure of the identifier server overcomes the shortcomings of its inherent latency and enables participation in storage requests through any of the available second identifier servers.

As shown in FIG. 4, in one embodiment, a device for obtaining a SIP server address is proposed, and the device includes:

As shown in FIG. 5, in an embodiment, the determining unit further includes:

A storage module configured to store a first identifier of the SIP server in a home user server;

The inserting module is configured to insert a second identifier of the SIP server into a message header of the SIP message.

In one embodiment, the receiving unit is further configured to receive one or more SIP messages; retrieve the first fully qualified domain name from the home user server, where the fully qualified domain name contains both the host name and the domain name where the host is located, which can be accurate It indicates where the host is, and the domain name is dispatched into the distributed task queue according to a preset scheduling policy. Priority scheduling can be performed on the domain name. The scheduling policy allocates a CPU time quota for each of the domain name queues. Weight, the thread selects the corresponding query domain name in the domain name queue according to the weight; uses the first fully qualified domain name DNS server; receives an empty response from the DNS server, and the empty response indicates the SIP server's Failed, and re-registered the user to assign a new SIP server.

In one embodiment, the determining unit further includes:

A receiving module configured to receive a second identifier of a SIP server in an intermediate network device before storing the first identifier;

A conversion module configured to convert the second identifier of the SIP server into the first identifier of the SIP server in the intermediate network device, wherein storing the first identifier of the SIP server in the home user server includes including the SIP server The first identifier is uploaded from the intermediate network device to the home user server.

In one embodiment, a computer device is provided. The computer device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to execute the computer program. To implement the steps in the method for obtaining the SIP server address in the above embodiments.

In one embodiment, a storage medium storing computer-readable instructions is provided. When the computer-readable instructions are executed by one or more processors, the one or more processors are executed to obtain the SIP server in the foregoing embodiments. Steps in the method of address. The storage medium may be a non-volatile storage medium.

A person of ordinary skill in the art may understand that all or part of the steps in the various methods of the foregoing embodiments may be implemented by a program instructing related hardware. The program may be stored in a computer-readable storage medium. The storage medium may include: Read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks, etc.

The technical features of the embodiments described above can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above embodiments have not been described. However, as long as there is no contradiction in the combination of these technical features, It should be considered as the scope described in this specification.

The above-mentioned embodiments only express some exemplary embodiments of the present application, and their descriptions are more specific and detailed, but cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of this application patent shall be subject to the appended claims.

Claims

A method for obtaining a SIP server address includes:

A SIP protocol stack for receiving and sending SIP messages and parsing and encapsulating the SIP messages is set in advance on the SIP server. The SIP protocol stack is used for receiving and sending SIP messages and receiving SIP messages initiated by a session. The session is Internet phone signaling, complying with the session initiation protocol;

Assigning a SIP server of a user associated with the SIP message;

Obtaining a Dynamic Host Distribution Protocol DHCP message according to the SIP server, and performing binary string processing to obtain a required domain name, and obtaining domain name information for obtaining a SIP server address;

Initiate a DNS resolution request for the domain name system according to the domain name information, call the domain name query interface provided by the DNS module of the gateway device, and send a query message for the service location SRV record to the DNS server, and process the query message returned by the DNS server according to the query message The response packet is obtained from the IP address of the required SIP server.
The method for obtaining a SIP server address according to claim 1, wherein the assigning a SIP server of a user associated with the SIP message further comprises the following steps:

Storing the first identifier of the SIP server in a home user server;

Inserting the second identifier of the SIP server into a message header of the SIP message.
The method for obtaining a SIP server address according to claim 1, wherein the SIP server comprises a service call session control function node.
The method for obtaining a SIP server address according to claim 1, further comprising:

Receive one or more SIP messages;

Retrieve the first fully qualified domain name from the home user server. The fully qualified domain name contains both the host name and the domain name where the host is located. It can accurately indicate where the host is and dispatch the domain name into the distributed according to a preset scheduling policy. In the task queue, priority scheduling may be performed on domain names. The scheduling strategy assigns a weight of a CPU time quota to each of the domain name queues, and a thread selects a query domain name in the corresponding domain name queue according to the weight;

Using the first fully qualified domain name DNS server;

Receiving an empty response from the DNS server, the empty response indicating the failure of the SIP server, and re-registering the user to allocate a new SIP server.
The method for obtaining a SIP server address according to claim 2, further comprising before storing the first identifier: receiving a second identifier of the SIP server in the intermediate network device; and in the intermediate network device, receiving the SIP server Converting the second identifier of the SIP server to the first identifier of the SIP server, wherein storing the first identifier of the SIP server in the home user server includes uploading the first identifier of the SIP server from the intermediate network device to the home user server .
A device for obtaining a SIP server address includes:

The receiving unit is configured to set in advance a SIP protocol stack on the SIP server for receiving and sending SIP messages, and for parsing and encapsulating the SIP messages. The SIP protocol stack is used for receiving and sending SIP messages and receiving session initiated SIP messages. The session is internet phone signaling and complies with the session initiation protocol;

A determining unit configured to allocate a SIP server of a user associated with the SIP message;

The obtaining unit is configured to obtain a dynamic host allocation protocol DHCP message according to the SIP server, and perform binary string processing to obtain a required domain name and obtain domain name information for obtaining a SIP server address;

The resolution unit is configured to initiate a DNS resolution request of the domain name system according to the domain name information, invoke a domain name query interface provided by a DNS module of the gateway device, and send a query message for a service location SRV record to the DNS server, and process the DNS server according to the The response message returned by the query message is used to obtain the IP address of the required SIP server.
The apparatus for obtaining a SIP server address according to claim 6, wherein the determining unit further comprises:

A storage module configured to store a first identifier of the SIP server in a home user server;

The inserting module is configured to insert a second identifier of the SIP server into a message header of the SIP message.
The apparatus for obtaining a SIP server address according to claim 6, wherein the SIP server comprises a service call session control function node.
The device for obtaining a SIP server address according to claim 6, wherein the receiving unit is further configured to receive one or more SIP messages; retrieve a first fully qualified domain name from a home user server, and the fully qualified domain name is simultaneously Contains the host name and the domain name where the host is located. It can accurately indicate where the host is, and dispatch the domain name into the distributed task queue according to a preset scheduling policy. Priority scheduling can be performed on the domain name. The scheduling policy is Each of the domain name queues assigns a CPU time quota weight, and the thread selects a corresponding query domain name in the domain name queue according to the weight; uses the first fully qualified domain name DNS server; receives an empty response from the DNS server, The null response indicates the failure of the SIP server and re-registers the user to allocate a new SIP server.
The apparatus for obtaining a SIP server address according to claim 7, wherein the determining unit further comprises:

A receiving module configured to receive a second identifier of a SIP server in an intermediate network device before storing the first identifier;

A conversion module configured to convert the second identifier of the SIP server into the first identifier of the SIP server in the intermediate network device, wherein storing the first identifier of the SIP server in the home user server includes including the SIP server The first identifier is uploaded from the intermediate network device to the home user server.
A computer device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

A SIP protocol stack configured to receive and send SIP messages and parse and encapsulate the SIP messages is set in advance on the SIP server. The SIP protocol stack is configured to receive and send SIP messages and receive SIP messages initiated by a session. Internet phone signaling, complying with the session initiation protocol;

Assigning a SIP server of a user associated with the SIP message;

Obtaining, according to the SIP server, a dynamic host allocation protocol DHCP message, and performing binary string processing to obtain a required domain name, and obtaining domain name information set to obtain a SIP server address;

Initiate a DNS resolution request for the domain name system according to the domain name information, call the domain name query interface provided by the DNS module of the gateway device, and send a query message for the service location SRV record to the DNS server, and process the query message returned by the DNS server according to the query message The response packet is obtained from the IP address of the required SIP server.
The computer device of claim 11, wherein the assigning a user's SIP server associated with the SIP message further causes the processor to perform the following steps:

Storing the first identifier of the SIP server in a home user server;

Inserting the second identifier of the SIP server into a message header of the SIP message.
The computer device of claim 11, wherein the SIP server includes a serving call session control function node.
The computer device according to claim 11, wherein the computer-readable instructions, when executed by the processor, further cause the processor to perform the following steps:

Receive one or more SIP messages;

Retrieve the first fully qualified domain name from the home user server. The fully qualified domain name contains both the host name and the domain name where the host is located. It can accurately indicate where the host is and dispatch the domain name into the distributed according to a preset scheduling policy. In the task queue, priority scheduling may be performed on domain names. The scheduling strategy assigns a weight of a CPU time quota to each of the domain name queues, and a thread selects a query domain name in the corresponding domain name queue according to the weight;

Using the first fully qualified domain name DNS server;

Receiving an empty response from the DNS server, the empty response indicating the failure of the SIP server, and re-registering the user to allocate a new SIP server.
The computer device according to claim 11, wherein before storing the first identifier, the processor is further caused to perform the following steps:

Receiving the second identifier of the SIP server in the intermediate network device; and converting the second identifier of the SIP server into the first identifier of the SIP server in the intermediate network device, wherein the first identifier of the SIP server is stored The home user server includes uploading the first identifier of the SIP server from the intermediate network device to the home user server.
A storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute the following steps:

A SIP protocol stack configured to receive and send SIP messages and parse and encapsulate the SIP messages is set in advance on the SIP server. The SIP protocol stack is configured to receive and send SIP messages and receive SIP messages initiated by a session. Internet phone signaling, complying with the session initiation protocol;

Assigning a SIP server of a user associated with the SIP message;

Obtaining, according to the SIP server, a dynamic host allocation protocol DHCP message, and performing binary string processing to obtain a required domain name, and obtaining domain name information set to obtain a SIP server address;

Initiate a DNS resolution request for the domain name system according to the domain name information, call the domain name query interface provided by the DNS module of the gateway device, and send a query message for the service location SRV record to the DNS server, and process the query message returned by the DNS server according to the query message The response packet is obtained from the IP address of the required SIP server.
The storage medium of claim 16, wherein the assigning a user's SIP server associated with the SIP message further causes one or more processors to perform the following steps:

Storing the first identifier of the SIP server in a home user server;

Inserting the second identifier of the SIP server into a message header of the SIP message.
The storage medium of claim 16, wherein the SIP server comprises a serving call session control function node.
The storage medium of claim 16, wherein the computer-readable instructions, when executed by the processor, further cause one or more processors to perform the following steps:

Receive one or more SIP messages;

Retrieve the first fully qualified domain name from the home user server. The fully qualified domain name contains both the host name and the domain name where the host is located. It can accurately indicate where the host is and dispatch the domain name into the distributed according to a preset scheduling policy. In the task queue, priority scheduling may be performed on domain names. The scheduling strategy assigns a weight of a CPU time quota to each of the domain name queues, and a thread selects a query domain name in the corresponding domain name queue according to the weight;

Using the first fully qualified domain name DNS server;

Receiving an empty response from the DNS server, the empty response indicating the failure of the SIP server, and re-registering the user to allocate a new SIP server.
The storage medium of claim 16, wherein before storing the first identifier, one or more processors are further caused to perform the following steps:

Receiving the second identifier of the SIP server in the intermediate network device; and converting the second identifier of the SIP server into the first identifier of the SIP server in the intermediate network device, wherein the first identifier of the SIP server is stored The home user server includes uploading the first identifier of the SIP server from the intermediate network device to the home user server.