CN108307694A - A kind of network connection information acquisition methods and router - Google Patents

Abstract

The present invention relates to the technical field of mobile communication, in particular to a method for obtaining network connection information and a router to solve the technical problem of how a new router automatically obtains the network connection information of an old router; in the present invention, the new router can receive the network connection information through the LAN interface. The data message sent by the old router through the WAN interface, so that the new router can directly obtain the network connection information of the old router through the received data message, which solves the technical problem of how the new router automatically obtains the network connection information of the old router.

Description

Method for acquiring network connection information and router technical field

The invention relates to the technical field of communication, in particular to a method for acquiring network connection information and a router.

Background technique

At present, many users' home networks are connected to Ethernet through Asymmetric Digital Subscriber Line (ADSL) or fiber-to-the-home. At this time, operators generally deploy ADSL in users' home networks. terminal or passive optical network (Passive Optical Network, PON) terminal. However, with the increasing demand for WIreless-Fidelity (Wi-Fi) Internet access, many users generally buy a new wireless router to replace the ADSL terminal or PON deployed in the user's home in order to solve the Wi-Fi signal coverage of the home. The terminal is connected to the Ethernet.

Generally speaking, there are three main network access methods for routers: 1. Point-to-Point Protocol over Ethernet (PPPoE) dial-up authentication mode (referred to as dial-up authentication mode); 2. Dynamic address allocation mode, That is, the way of automatically assigning addresses through the Dynamic Host Configuration Protocol (DHCP) server; 3. The way of static addresses, that is, the way of networking by inputting known Internet Protocol (Internet Protocol, IP) addresses.

When a user replaces an old router at home (a router already connected to the uplink network) with a new router (the router that will be connected to the uplink network), it is generally necessary to first understand the network access method used by the old router, and then manually follow the network access method of the old router. The access method is to set the new router so that the new router can successfully connect to the uplink network. If the old router adopts the PPPoE authentication method for network access, the user needs to know the user name and password. Generally, the user name and password for broadband access can only be entered once when the old router is initially installed, and the saved user name and password will be used automatically for subsequent use. For network connection, users generally do not remember the user name and password when replacing the old router; if the old router adopts a static address method for network access, the user also needs to obtain an IP address first, and ordinary users do not know how to obtain an IP address. All bring a lot of trouble to replace the new router.

In summary, how the new router automatically obtains the network connection information of the old router will be an urgent problem to be solved.

Contents of the invention

The present application provides a method for obtaining network connection information and a router to solve the technical problem of how a new router automatically obtains the network connection information of an old router.

In the first aspect, a method for obtaining network connection information is provided, which is applied to a new router capable of obtaining network connection information of an old router, including:

The new router receives a data message through the LAN interface of the new router, and the data message includes an Ethernet message sent by the old router to the LAN interface of the new router through the WAN interface of the old router;

The new router determines the network connection information of the old router according to the data packet.

In this application, the new router can receive the data packets sent by the old router through the Wide Area Network (Wide Area Network, WAN) interface through the local area network (Local Area Network, LAN) interface, and the data packets sent by the old router through the WAN interface are generally They are all normally sent to the server in the uplink network during work, so the new router is equivalent to intercepting the data packets sent by the old router to the server in the uplink network. Then, the new router can directly obtain the network connection information of the old router through the received data message, which solves the technical problem of how the new router automatically obtains the network connection information of the old router, and then the new router can directly use the obtained network connection information and Uplink network connection does not require users to manually configure new routers, which simplifies the process of enabling new routers, reduces the probability of errors caused by manual processing by users, and also reduces the burden on users.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the network connection information includes: authentication information, one or more of a network connection mode or an IP address.

Because the network access method of the old router may be different, the obtained network connection information may also be different, but no matter which network access method is used, the obtained network connection information can include authentication information, network connection method or IP address. One or more of them, so as to ensure that the new router can It is possible to obtain relatively complete network connection information of the old router.

With reference to the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the new router determines the network connection information of the old router according to the data packet, including:

If the data message is an Ethernet message and is a broadcast message, and the data message includes a PPPoE message, then the new router determines that the network connection mode of the old router is a dial-up authentication mode;

Described new router accepts the PPPoE conversation that described old router initiates; Wherein, described new router works in PPPoE Server mode;

During the PPPoE session process between the new router and the old router, the new router obtains the authentication information of the old router.

If the new router determines that the network connection mode of the old router is dial-up authentication, the new router can also enter the PPPoE Server mode, and obtain the authentication information of the old router through the PPPoE session process with the old router, so that the obtained authentication information can be passed. Access to the uplink network through dial-up authentication, that is, the new router can obtain authentication information and access the uplink network by itself, without manual operation by the user, and also without the need for the user to memorize the user name and password of the old router, which reduces the burden on the user and improves The user experience also improves the intelligence and practicality of the new router.

With reference to the first possible implementation of the first aspect, in a third possible implementation of the first aspect, the new router determines the network connection information of the old router according to the data packet, including:

If the data message is an Ethernet message and is a broadcast message, and the data message includes a DHCP broadcast message, then the new router determines that the network connection mode of the old router is a dynamic address allocation mode.

With reference to the first possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the new router determines the network connection information of the old router according to the data packet, including:

If the data message is an Ethernet message and is a non-broadcast message, and the data message includes IP message, the new router determines whether the source address of the IP message is legal;

If the source address of the IP message is valid, the new router determines that the network connection mode of the old router is a static address mode, and the IP address is the source address of the IP message.

The new router can determine the network connection mode of the old router according to the received data packets, and can perform uplink network access by itself according to different network connection modes without user participation. For example, if the data packet contains an IP packet, the new router can obtain the source address of the IP packet by itself, so that the source address of the IP packet can be used as the IP address for the uplink network connection, and the user does not need to obtain the IP address , to reduce the burden on users.

With reference to the second possible implementation of the first aspect, in the fifth possible implementation of the first aspect, after obtaining the authentication information of the old router, further include:

The new router is switched from the PPPoE Server mode to the PPPoE client mode;

In the PPPoE client mode, the new router uses the obtained network connection information to connect to the network.

When the new router obtains the authentication information, the new router works in PPPoE Server mode, and when connecting to the uplink network, the new router needs to work in the PPPoE client mode. Therefore, after obtaining the authentication information, the new router can start from the PPPoE Server mode. Switch to PPPoE client mode, so that the new router can obtain authentication information by itself, and can also perform uplink network connection without user participation, and the new router can switch working modes by itself, and can also avoid errors.

In combination with the first aspect or any possible implementation manner of the first to fifth possible implementation manners of the first aspect, in the sixth possible implementation manner of the first aspect, in the After the new router receives the data message through the LAN interface of the new router, it also includes:

The new router records the source MAC address of the data packet, and sets the source MAC address as the MAC address of the WAN interface of the new router.

There are still many Internet Service Providers (Internet Service Providers, ISPs) that bind MAC addresses, that is, only routers with specific MAC addresses can connect to the network. For example, in a family, if you use an old router for the first time network connection, then the ISP will recognize the MAC address of the old router, and if another router is changed later, because the MAC address of the router Already, the ISP may not provide the Internet connection. Therefore, in this application, a new function can be added to the new router, that is, the MAC address of other routers (such as the old router) can be automatically detected and obtained as the MAC address of the WAN interface of the router, thereby ensuring that the new router can replace the old router for uplink Network connection, try to avoid the situation that the new router cannot connect to the uplink network.

In a second aspect, the first router is provided, the router has the ability to obtain the network connection information of the old router, and the router includes:

A LAN interface, configured to receive a data message, the data message includes an Ethernet message sent by the old router to the LAN interface through the WAN interface of the old router;

A processor, configured to determine the network connection information of the old router according to the data packet.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the network connection information includes: authentication information, one or more of a network connection mode or an IP address.

With reference to the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the processor is configured to:

If the data message is an Ethernet message and is a broadcast message, and the data message includes a PPPoE message, then it is determined that the network connection mode of the old router is a dial-up authentication mode;

Accept the PPPoE session that described old router initiates; Wherein, described router works in PPPoE Server mode;

In the PPPoE session process between the router and the old router, the authentication information of the old router is acquired.

With reference to the first possible implementation of the second aspect, in a third possible implementation of the second aspect, the processor is configured to:

If the data message is an Ethernet message and is a broadcast message, and the data message includes a DHCP broadcast message, then determine that the network connection mode of the old router is a dynamic address allocation mode.

With reference to the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the processor is configured to:

If the data message is an Ethernet message and is a non-broadcast message, and the data message includes IP message, determining whether the source address of the IP message is legal;

If the source address of the IP message is legal, then determine that the network connection mode of the old router is a static address mode, and the IP address is the source address of the IP message.

With reference to the second possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the processor is further configured to:

After obtaining the authentication information of the old router, switch the router from the PPPoE Server mode to the PPPoE client mode;

In the PPPoE client mode, use the obtained network connection information for network connection.

In combination with the second aspect or any possible implementation manner of the first possible implementation manner to the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner of the second aspect, the Processors are also used to:

After the LAN interface receives the data message, record the source MAC address of the data message, and set the source MAC address as the MAC address of the WAN interface of the router.

In a third aspect, a second type of router is provided, the router has the capability of obtaining network connection information of the old router, and the router includes a module for executing the method of the first aspect.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1A is a schematic diagram of a scenario where a terminal accesses an Ethernet through a router;

FIG. 1B is a schematic diagram of a connection between a new router and an old router in an embodiment of the present invention;

Fig. 2 is the first flow chart of the network connection method in the embodiment of the present invention;

Fig. 3 is a schematic diagram of the format of an Ethernet broadcast message in an embodiment of the present invention;

FIG. 4 is a schematic diagram of obtaining authentication information through a PPPoE session process in an embodiment of the present invention;

Fig. 5 is a second flow chart of the network connection method in the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention.

Hereinafter, some terms used in the present invention will be explained.

1) The old router is a router that has been connected to the uplink network.

The new router is the router that will be connected to the uplink network and is used to replace the old router.

2) "Multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

Firstly, the application scenarios of the embodiments of the present invention are introduced.

Please refer to FIG. 1A , which is a schematic diagram of a scenario where a terminal accesses an Ethernet through a router. Terminal 1 in Fig. 1 is for example mobile phone, and terminal 2 is for example personal computer (Personal computer, PC), and terminal 1 and terminal 2 are connected router 1 by wireless mode, and router 1 is connected to Internet (Internet) again, thereby realized terminal 1 and Terminal 2's connection to the Internet.

Wherein, a modem (modulator-demodulator, modem) is integrated in the router 1, so it can be directly connected to the Internet. If the modem is not integrated in the router 1, the router 1 can be connected to the modem through Ethernet, and the modem is then connected to the Internet, so as to realize the connection between the terminal 1 and the terminal 2 and the Internet.

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Wherein, in the embodiment of the present invention, when the old router needs to be replaced by a new router to continue working, the technical solution provided in the embodiment of the present invention can be adopted.

In addition, please refer to FIG. 1B , which is a schematic diagram of a wiring manner in an embodiment of the present invention, wherein FIG. 1B is a family scene as an example. In Figure 1B, the WAN interface of the new router is connected to the Ethernet port in the home to access the Internet, and the LAN interface of the new router should have been connected to the network in the home. The device connection may include, for example, devices such as personal computers (PCs). However, in order to realize the technical solution of the embodiment of the present invention, the LAN interface of the new router can be connected to the equipment in the family after first connecting the new router to the uplink network, that is, when the old router is to be replaced by the new router, the new The LAN interface of the router is connected to the WAN interface of the old router, as shown in FIG. 1B , after the two interfaces are connected, the new router can execute the network connection information acquisition method provided by the embodiment of the present invention.

Generally speaking, old routers often interact with uplink network devices during work. For example, if the old router uses a dynamic address allocation method for network connection, then the old router will communicate with uplink network devices such as DHCP servers during work. to interact. The old router generally sends data packets to the upstream network equipment through the WAN interface of the old router, and also receives the data packets of the old upstream network equipment through the WAN interface of the old router. After the interface is connected to the WAN interface of the old router, for the old router, it will regard the new router as an uplink network device, so it will normally send Ethernet packets through the WAN interface, and the new router is equivalent to intercepting the old router to send All data packets sent to uplink network devices.

Wherein, the data message may include an Ethernet message, that is, the data message sent by the old router to the LAN interface of the new router through the WAN interface of the old router may include the LAN message sent by the old router to the new router through the WAN interface of the old router. Ethernet packets of the interface.

Referring to FIG. 2 , an embodiment of the present invention provides a method for obtaining network connection information, which can be applied to a new router capable of obtaining network connection information of an old router, and the flow of the method is described as follows.

Step 201: the new router receives the data message through the LAN interface of the new router, and the data message includes the first Ethernet message sent by the old router to the LAN interface of the new router through the WAN interface of the old router;

Step 202: The new router determines the network information of the old router according to the data packet.

Optionally, the new router may have at least two modes, for example, may have at least a normal working mode and a detection mode. After the new router is connected to the uplink network, it can work normally In mode, the new router can provide normal network connection for devices in the home through the uplink network. When the new router performs the work of obtaining network connection information provided in the embodiment of the present invention, it can work in the detection mode. In the detection mode, the new router can obtain the network connection information of the old router.

For example, when a new router leaves the factory, it can be set to the detection mode by default, or it can be automatically switched to the detection mode when no uplink network is detected, or the user can manually switch the new router to the detection mode (for example, the user can press the the corresponding button on the new router to switch the mode of the new router), and so on.

For example, after the new router is successfully connected to the uplink network, it can automatically switch to the normal working mode, or when the new router leaves the factory, it can be set to the normal working mode by default, or the user can manually switch the new router to the normal working mode, etc. Wait.

optional,

Before the new router receives data packets through the LAN interface of the new router, it also includes:

The new router starts the timer;

The new router receives data packets through the LAN interface of the new router, including:

Before the timer expires, the new router receives the data message through the LAN interface of the new router.

The purpose of starting the timer is to give a time limit to the network connection information acquisition process, because it does not rule out that the old router may not send data packets through the WAN interface for a long time, if the new router is still waiting to receive in this case If not, the power consumption of the new router is relatively large, and it has also done useless work. So, the new router can set a timer, after connecting the new router's LAN interface with the old router's WAN interface, the new router can start the timer, and before the timer expires, the new router can receive the datagram sent by the old router After the timer expires, no matter whether the new router has received the data message, the new router can stop receiving the data message, thereby reducing the power consumption of the new router. The duration of the timer can be set when the new router leaves the factory, or can be set by the user later, which is not limited by the embodiment of the present invention.

Generally speaking, when the uplink network connection of the old router is relatively stable, it may not send data packets through the WAN interface, or may send a small amount of data packets. In this case, the new router Datagrams may not be easily received. Then, in order to ensure that the new router can receive the data packets sent by the old router, after connecting the LAN interface of the new router to the WAN interface of the old router, you can restart the old router. Send the datagram so that the new router can receive the datagram sent by the old router through the LAN interface.

Optionally, if the new router has not intercepted any data packets after the timer expires, or although it has intercepted the data packets, the network connection information of the old router cannot be obtained through the intercepted data packets, then the new router can Continue to use the method in the prior art for network connection.

Please refer to Fig. 3, it is a kind of possible format of Ethernet message, comprise destination Media Access Control (Media Access Control, MAC) address (generally occupy 6 bytes), source MAC address (generally) in an Ethernet message Occupies 6 bytes), type (also known as the protocol type field, generally occupies 2 bytes), data (that is, the data carried by the message, generally occupies 46-1500 bytes), and generally occupies 4 Byte Frame Check Sequence (Frame Check Sequence, FCS).

Optionally, to determine the network connection information of the old router according to the Ethernet packets, it is necessary to first determine the type of the Ethernet packets, and different types indicate different network connection information. The type of an Ethernet packet can be judged through the protocol type field in the Ethernet packet.

Optionally, the network connection information includes: authentication information, one or more of network connection mode or IP address.

For example, the network connection mode may include dial-up authentication mode, dynamic address allocation mode and static address mode. If the network connection mode of the old router obtained by the new router is a dial-up authentication mode, the new router also needs to obtain the authentication information of the old router, so as to perform network connection through the authentication information, and the authentication information may include, for example, a user name and/or a password etc.; if the network connection mode of the old router obtained by the new router is a static address mode, then the new router also needs to obtain the IP address of the old router, so as to perform network connection through this IP address.

The following describes how the new router obtains network connection information.

1. Dial-up authentication method.

The new router receives the data message sent by the old router through the LAN interface, and the new router analyzes the received data message. If any data message in the received data message is an Ethernet message, And the destination MAC address of this Ethernet message is FF:FF:FF:FF:FF:FF, then the new router determines that this Ethernet message is a broadcast message, if the value of the protocol type field in the broadcast message is 0x8863, then the new router can determine that the broadcast message is a PPPoE broadcast message, then the new router determines that the network connection mode of the old router is the dial-up authentication mode, and the new router determines that it needs to further obtain the authentication information of the old router.

Optionally, after it is determined that the network connection mode of the old router is the dial-up authentication mode, the new router can enter the PPPoE server (Server) mode. At present, routers generally can only work in PPPoE client (Client) mode, and PPPoE Server mode is generally the working mode of the server. In the embodiment of the present invention, in order to enable the new router to carry out the PPPoE session, it is necessary to make some improvements to the new router so that the new router can simulate working in the PPPoE Server mode.

After the new router enters the PPPoE Server mode, it can accept the PPPoE sessions initiated by the old router. Generally speaking, after the old router sends the PPPoE broadcast message to the upstream network equipment (in the embodiment of the present invention, the new router receives the PPPoE broadcast message), the old router will initiate a PPPoE session to the upstream network equipment, so, the present invention In an embodiment, the new router working in PPPoE Server mode can accept the PPPoE session initiated by the old router, and the new router can obtain the authentication information of the old router through the PPPoE session process with the old router.

At present, the PPPoE session process can be divided into three phases, that is, the discovery (Discovery) phase, the session (Session) phase and the termination (Terminate) phase.

Please refer to FIG. 4 , which is a schematic diagram of interaction of the PPPoE session flow between the new router and the old router. The first step is the Discovery stage, which consists of four processes. After completion, both the new router and the old router will know the session ID number (Session_ID) of PPPoE and the Ethernet address of the other party. These parameters jointly determine the unique PPPoE Session.

First, the old router sends a PPPoE Active Discovery Initiation (PADI) message by broadcast, and the PADI message contains the service type information that the old router wants to obtain.

After the new router receives the PADI message, it compares the service requested in the PADI message with the service it can provide, and if it can provide it, it will reply PPPoE to the old router through unicast Active Discovery Offer (PPPoE Active Discovery Offer, PADO) message.

After the old router receives the PADO message, it sends a PPPoE Active Discovery Request (PPPoE Active Discovery Request, PADR) message to the new router through unicast.

The new router generates a unique session ID (Session_ID), which is used to identify the current PPPoE session with the old router. The new router sends a PPPoE active discovery session confirmation (PPPoE Active Discovery Session-confirmation, PADS) message to the old router, and carries the Session_ID in the PADS message and sends it to the old router.

If no errors occur in the above processes, the PPPoE session is established, the Discovery phase ends, and then enters the Session phase.

The work in the Discovery stage establishes a session between the new router and the old router, and then enters the Session stage. The Session stage can be divided into two parts. The first part is the Point to Point Protocol (PPP) negotiation stage, and the second part is the PPP packet transmission stage after the PPP negotiation stage ends and if the negotiation is successful.

Among them, the PPP negotiation method in PPPoE is consistent with the ordinary PPP negotiation method, which is divided into three stages: the link control protocol (Link Control Protocol, LCP) negotiation stage, the authentication stage, and the network control protocol (Network Control Protocol, NCP) stage. stage.

The first is the LCP negotiation stage. The LCP negotiation stage mainly completes the establishment, configuration, and detection of data link connections.

Generally speaking, during the LCP negotiation phase, the communication parties can adopt different authentication methods, such as the Password Authentication Protocol (Password Authentication Protocol, PAP) authentication method, or the Challenge Handshake Authentication Protocol (Challenge Handshake Authentication Protocol, CHAP). Authentication methods, etc., in the embodiment of the present invention, the PPPoE session is performed in order to obtain the authentication information when the old router connects to the network through the dial-up authentication method. Therefore, in the embodiment of the present invention, in the LCP negotiation stage, the new router and the old router Use the PAP authentication method for authentication.

In the PAP authentication mode, the old router sends the authentication information of the dial-up authentication mode to the new router in plain text, as shown in Figure 4, the old router sends a PAP Request (PAP request) to the new router, and carries the authentication information in plain text In PAP Request. In the embodiment of the present invention, authentication information example For example, information such as user names and passwords for network connections through dial-up authentication may be included.

After the new router obtains the authentication information of the old router, because there is no need to continue the subsequent session process, the new router can respond to the old router with an authentication failure (PAP NAK). Thus, the PPP session process is terminated.

Afterwards, the new router can send a PPPoE Active Discovery Terminate (PPPoE Active Discovery Terminate, PADT) message to the old router to terminate the PPPoE session process, or the PADT message can also be sent by the old router to the new router.

At this point, the PPPoE session process is over, and the new router can switch to the normal PPPoE Client mode again, and can connect to the uplink network by means of dial-up authentication through the obtained authentication information.

In addition, after the new router successfully connects to the uplink network, it can output prompt information, which is used to remind the user that the uplink network has been successfully connected. After receiving the prompt information, the user can disconnect the connection between the new router and the old router. The devices in the home that need to be connected to the Internet are connected to the LAN interface of the new router, so that they can be connected to the Internet through the new router.

Wherein, for example, the prompt information can be a sound prompt, or it can also be a text prompt (for example, a new router sends information to a terminal used by a user), or it can also be a vibration prompt, or it can be other types of prompts, for example, it can be a prompt As long as the indicator light set on the new router flickers and the like can be used to prompt the user, the embodiment of the present invention does not limit the type of prompt information.

Now when the user replaces the router, if he knows that the original router is connected to the network through dial-up authentication, the user needs to obtain the user name and password of the old router again. The router's World Wide Web (Web) page to obtain, or to obtain by calling the operator, etc., in a word, very troublesome. However, with the method provided by the embodiment of the present invention, even if it is a dial-up authentication method, the new router can automatically obtain the authentication information of the old router without manual operation by the user, which greatly reduces the burden on the user.

Second, the dynamic allocation of addresses.

The new router receives the data packet sent by the old router through the LAN interface, and the new router analyzes the received data packet. If any data packet in the received data packet is an Ethernet packet, and the Ethernet packet’s If the destination MAC address is FF:FF:FF:FF:FF:FF, the new router determines the The Ethernet message is a broadcast message, if the value of the protocol type field in the broadcast message is 0x0800 (IPv4 message) or 0x86DD (IPv6 message), then it is determined that the broadcast message is an IP broadcast message, and then See if the protocol type of the IP broadcast message is User Datagram Protocol (UDP), if it is a UDP broadcast message, and the original port of the broadcast message is 68, and the destination port is 67, then the new router can After determining that the broadcast message is a DHCP broadcast message, the new router determines that the network connection mode of the old router is a dynamic address allocation mode.

In the embodiment of the present invention, if the new router determines that the network connection mode of the old router is a dynamic address allocation mode, then the new router can send a request message to the DHCP server, and the request message is used to request the DHCP server to assign a dynamic address for the new router. If the DHCP server assigns a dynamic address to the new router, the new router can connect to the network according to the assigned dynamic address.

3. Static address mode.

The new router receives the data packet sent by the old router through the LAN interface, and the new router analyzes the received data packet. If any data packet in the received data packet is an Ethernet packet, and the Ethernet packet’s If the destination MAC address is not FF:FF:FF:FF:FF:FF, the new router determines that the Ethernet packet is a non-broadcast packet. If the value of the protocol type field in the non-broadcast packet is 0x0800 or 0x86DD, then Determine that this non-broadcast message is an IP message, then the new router can determine whether the source address (i.e. source IP address) of this IP message is legal, if the source address of this IP message is legal, then the new router determines the network address of the old router The connection mode is a static address mode, and the new router determines that the IP address to be obtained is the source address of the IP packet.

In the embodiment of the present invention, if the new router determines that the network connection mode of the old router is a static address mode, the new router can use the source address of the IP message as the address of the WAN interface of the new router to connect to the network.

At present, if a static address is used to connect to the network, the user needs to manually enter the IP address, but in the embodiment of the present invention, these operations can be automatically completed by the new router, which reduces the burden on the user and reduces the burden caused by the manual operation of the user. to the probability of error.

For broadcast packets, except for PPPoE-type broadcast packets and DHCP-type broadcast packets, other types of broadcast packets may not be used to obtain the network connection information of the old router. Therefore, if the new router receives the broadcast packet before the timer expires and determines that the received broadcast packet is neither a PPPoE broadcast packet nor a DHCP type broadcast packet, the new router can discard the received broadcast packet , the network connection information of the old router could not be obtained.

For non-broadcast packets, except for IP packets with legal source addresses, other types of non-broadcast packets may not be used to obtain the network connection information of the old router. Therefore, if the new router receives If a non-broadcast packet is received, and the non-broadcast packet is not an IP packet, or is an IP packet with an illegal source address, the new router can discard these received packets and cannot obtain the network connection information of the old router.

Optionally, although old routers may only connect to the network through a network connection method, such as dial-up authentication, some old routers may send multiple types of Ethernet packets when sending Ethernet packets through the WAN interface. The message, for example, may send a PPPoE broadcast message, may also send a DHCP broadcast message, and may also send an IP message. If so, the new router may receive multiple different types of Ethernet packets before the timer expires. In this case, the embodiment of the present invention assigns priority to each network connection mode according to the stability of the network connection. For example, the dial-up authentication method has the highest priority, followed by the dynamic address allocation method, and the static address method has the lowest priority. If the new router receives multiple types of Ethernet packets, the new router can start from Highest to lowest order to determine how the old router is connected to the network. The following examples are introduced.

Optionally, before the timer expires, if the new router receives two different types of Ethernet packets, for example, including a first Ethernet packet and a second Ethernet packet, wherein the first Ethernet packet is, for example, is a PPPoE broadcast message, and the second Ethernet message is, for example, a DHCP broadcast message, then the new router can determine that the network connection mode of the old router is the dial-up authentication mode indicated by the PPPoE broadcast message according to the priority of each network connection mode. , that is, because the success rate of the network connection through the dial-up authentication method is high, and the network connection is relatively stable, so the embodiment of the present invention preferentially adopts the dial-up authentication method for network connection.

Optionally, before the timer expires, if the new router receives two different types of Ethernet packets, for example, including the first Ethernet packet and the third Ethernet packet, wherein the first Ethernet packet The text is, for example, a PPPoE broadcast message, and the third Ethernet message is, for example, an IP message (the third Ethernet message here is a non-broadcast message with a legal source address), so the new router is based on the priority of each network connection mode. level, it can be determined that the network connection mode of the old router is the dial-up authentication mode indicated by the PPPoE broadcast message.

Optionally, before the timer expires, if the new router receives three different types of Ethernet packets, for example, including the first Ethernet packet, the second Ethernet packet and the third Ethernet packet, wherein , the first Ethernet message is, for example, a PPPoE broadcast message, the second Ethernet message is, for example, a DHCP broadcast message, and the third Ethernet message is, for example, an IP message. , it can be determined that the network connection mode of the old router is the dial-up authentication mode indicated by the PPPoE broadcast message.

Optionally, before the timer expires, if the new router receives two different types of Ethernet packets, for example, including a second Ethernet packet and a third Ethernet packet, wherein the second Ethernet packet is, for example, It is a DHCP broadcast message, and the third Ethernet message is, for example, an IP message, so the new router can determine that the network connection mode of the old router is the dynamic address allocation mode indicated by the DHCP broadcast message according to the priority of each network connection mode .

Optionally, when the new router has received both the PPPoE broadcast message and the DHCP broadcast message, if the new router fails to connect to the network through dial-up authentication, the new router can reconnect to the network by dynamically assigning addresses. If the new router fails to connect to the network by dynamically assigning addresses, the new router can connect to the network by using the method provided in the prior art.

Optionally, when the new router has received both the PPPoE broadcast message and the IP message, if the new router fails to connect to the network through dial-up authentication, the new router can reconnect to the network with a static address. If the new router fails to connect to the network using the static address method, the new router can connect to the network using the method provided in the prior art.

Optionally, when the new router has received both PPPoE broadcast packets and DHCP broadcast packets and IP packets, if the new router fails to connect to the network through dial-up authentication, the new router can use dynamic address allocation again way to connect to the network. If the new router fails to connect to the network by dynamically assigning addresses, the new router can continue to use static addresses to connect network. If the static address method also fails to connect to the network, the new router can use the method provided in the prior art to connect to the network.

Optionally, when the new router has received both the DHCP broadcast message and the IP message, if the new router fails to connect to the network by dynamically assigning addresses, the new router can reconnect to the network by using a static address. If the new router fails to connect to the network using the static address method, the new router can connect to the network using the method provided in the prior art.

Optionally, in the case that the new router only receives the PPPoE broadcast message, if the new router fails to connect to the network through dial-up authentication, the new router can connect to the network using the method provided in the prior art.

Optionally, in the case that the new router only receives the DHCP broadcast message, if the new router fails to connect to the network through dynamic address allocation, the new router can connect to the network in the way provided in the prior art.

Optionally, in the case that the new router has only received non-broadcast IP packets with a legal source address, if the new router fails to connect to the network through a static address, the new router can use the method provided in the prior art to connect to the network .

Please refer to FIG. 5 , which is a more detailed flow chart of the network connection method in the embodiment of the present invention, which generally introduces the previous steps. Because each step involved in this flow chart and various turning relationships have been introduced before, so I won't repeat them here.

Optionally, many ISPs are still bound with MAC addresses, that is, only routers with specific MAC addresses can connect to the network. For example, in a family, if the old router is used for the first time to connect to the network, the ISP will After identifying the MAC address of the old router, if you change to another router later, the ISP may not provide network connection because the MAC address of the router has changed.

In order to solve this problem, in the embodiment of the present invention, a new function can be added to the router, that is, the MAC address of other routers can be automatically detected and obtained as the MAC address of the WAN interface of the router. This feature can be turned on automatically when the router leaves the factory, or it can be enabled by the user when desired.

Then, if the new router has this function, the LAN interface of the new router and the old router After the WAN interface of the new router is connected, the new router receives the data packet sent by the old router, then the new router can record the source MAC address carried in the received data packet, and use the recorded source MAC address as the MAC address of the WAN interface of the new router. for network connection. Wherein, the source MAC address carried in the data message received by the new router through the LAN interface is the MAC address of the old router, that is, the new router is equivalent to cloning the MAC address of the old router.

Wherein, the new router records the data message of the source MAC address, which can be a PPPoE broadcast message, or a DHCP broadcast message, or an IP message with a legal source address, or other types of broadcast messages, or can also be are other types of non-broadcast packets, and so on. In addition, the new router records the data packet of the source MAC address, which can be the first data packet sent by the old router after the LAN interface of the new router is connected to the WAN interface of the old router, or it can be any data packet sent by the old router. message.

The devices in the embodiments of the present invention are introduced below.

Based on the same inventive concept, an embodiment of the present invention provides a router, where the router may include a LAN interface and a processor.

Wherein, the router may include one or more LAN interfaces.

Optionally, the router may also include other interfaces, for example, may also include a WAN interface for communicating with uplink network devices (such as a DHCP server, etc.).

Likewise, the router may also include one or more WAN interfaces.

Specifically, the processor can be a central processing unit or an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), which can be one or more integrated circuits used to control program execution, or can be implemented using a Field Programmable Gate Array (Field Programmable Gate Array) , FPGA) developed hardware circuit can be a baseband chip.

These LAN interfaces and WAN interfaces can be connected to the processor through a bus, or can also be connected to the processor respectively through special connection lines.

By designing and programming the processor, the code corresponding to the aforementioned method is solidified into the chip, so that the chip can execute the aforementioned method shown in FIG. 2 during operation. How to design and program a processor is well known to those skilled in the art, and will not be repeated here.

The router may be used to execute the method described in FIG. 2 above, for example, it may be the new router as described above.

The LAN interface of the new router can be connected to the WAN interface of the old router, and the new router can receive the data message sent by the old router through the LAN interface, so that the processor can obtain the network connection information of the old router according to the received data message.

The new router receives the data message sent by the old router, and the processor analyzes the received data message. For example, by analyzing the destination MAC address and protocol field type of the data message, the processor can determine the type of the data message.

Optionally, if it is determined that the received data message includes an Ethernet message, such as including a PPPoE broadcast message, the processor determines that the network connection mode of the old router is a dial-up authentication mode, then the processor can make the new router enter the PPPoE Server mode, After the new router enters the PPPoE Server mode, the processor can accept the PPPoE session initiated by the old router, so that the processor can obtain the authentication information of the old router through the PPPoE process with the old router. After obtaining the authentication information of the old router, the processor can use the obtained authentication information to connect to the uplink network in a dial-up authentication manner.

Optionally, if it is determined that the received data message includes an Ethernet message, such as a DHCP broadcast message, and the processor determines that the network connection mode of the old router is a dynamic address allocation mode, the processor may send a request message to the DHCP server, The request message is used to request the DHCP server to assign a dynamic address for the new router. If the DHCP server assigns a dynamic address to the processor, the processor can connect to the uplink network according to the assigned dynamic address.

Optionally, if it is determined that the received data packet is an Ethernet packet, such as including a non-broadcast packet, and is an IP packet, the processor can determine whether the source address of the IP packet is legal, if the IP packet If the source address is valid, the processor determines that the network connection mode of the old router is a static address mode, and the processor determines that the IP address to be obtained is the source address of the IP message. After obtaining the source address of the IP message, the processor can use the source address of the IP message as the address of the WAN interface of the new router to connect to the uplink network.

Optionally, the new router can also clone the MAC address of the old router if necessary. For example, if the processor receives a data packet sent by the old router through the LAN interface, the processor will By parsing the data packet, the source MAC address carried by the data packet can be obtained. The source MAC address carried by the data packet is also the MAC address of the old router, and the processor can record the source MAC address carried by the data packet. MAC address, and set the source MAC address carried in the data packet as the MAC address of the WAN interface of the new router.

For more functions realized by each functional unit in the router, reference may be made to the description of the method part in FIG. 2 , and details are not repeated here.

Based on the same inventive concept, an embodiment of the present invention also provides a router, which may include a receiving module and a processing module.

In practical applications, the physical device corresponding to the processing module may be the aforementioned processor, and the physical device corresponding to the receiving module may be the aforementioned LAN interface. When the processing module communicates with an uplink network device (such as a DHCP server, etc.), it can be implemented through the aforementioned WAN interface.

The router may be used to execute the method described in FIG. 2 above, for example, the router may be the new router as described above. Therefore, for the functions realized by the functional units in the router, etc., reference may be made to the description of the method part in FIG. 2 , and details will not be repeated.

In the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to implement the embodiments of the present invention.

Each functional unit in the embodiment of the present invention may be integrated into one processing unit, or each unit may also be an independent physical module.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, all or part of the technical solutions of the present invention may be embodied in the form of software products, which are stored in a storage medium and include instructions to enable a computer device (which may be a personal computer, A server, or a network device, etc.) or a processor (processor) executes all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: Universal Serial Bus flash drive (Universal Serial Bus flash drive), mobile hard disk, read-only memory (read-only memory, ROM), random-access memory (random-access memory, RAM), magnetic disk Various media that can store program codes such as discs or optical discs.

As mentioned above, the above embodiments are only used to introduce the technical solutions of the present invention in detail, but the descriptions of the above embodiments are only used to help understand the methods of the embodiments of the present invention, and should not be construed as limitations on the embodiments of the present invention. Changes or substitutions that can be easily imagined by those skilled in the art should fall within the protection scope of the embodiments of the present invention.

Claims (21)

A method for obtaining network connection information, applied to a new router capable of obtaining network connection information of an old router, characterized in that it includes: The new router receives a data packet through the LAN interface of the new router, and the data packet includes the Ethernet packet sent by the old router to the LAN interface of the new router through the WAN interface of the old router. arts; The new router determines the network connection information of the old router according to the data packet. The method of claim 1, wherein The network connection information includes: authentication information, one or more of network connection mode or Internet Protocol IP address. The method according to claim 2, wherein the new router determines the network connection information of the old router according to the data message, including: If the data message is an Ethernet message and is a broadcast message, and the data message includes a point-to-point protocol PPPoE message on the Ethernet, then the new router determines that the network connection mode of the old router is dial-up verification method; The new router accepts the PPPoE session initiated by the old router; wherein, the new router works in the PPPoE server mode; During the PPPoE session process between the new router and the old router, the new router obtains the authentication information of the old router. The method according to claim 2, wherein the new router determines the network connection information of the old router according to the data message, including: If the data message is an Ethernet message and is a broadcast message, and the data message includes a Dynamic Host Configuration Protocol DHCP broadcast message, then the new router determines that the network connection mode of the old router is dynamic Address allocation method. The method according to claim 2, wherein the new router according to the data message, to determine the network connection information of the old router, including: If the data message is an Ethernet message and is a non-broadcast message, and the data message includes an IP message, the new router determines whether the source address of the IP message is legal; If the source address of the IP message is valid, the new router determines that the network connection mode of the old router is a static address mode, and the IP address is the source address of the IP message. The method according to claim 3, further comprising: after obtaining the authentication information of the old router: The new router is switched from the PPPoE Server mode to the PPPoE client client mode; In the PPPoE client mode, the new router uses the obtained network connection information to connect to the network. The method according to any one of claims 1-6, wherein, after the new router receives the data message through the LAN interface of the new router, further comprising: The new router records the source MAC address of the data packet, and sets the source MAC address as the MAC address of the WAN interface of the new router. A router, characterized in that, the router has the ability to obtain the network connection information of the old router, and the router includes: The LAN interface of the local area network is used to receive the data message, and the data message includes the Ethernet message sent by the old router to the LAN interface through the WAN interface of the old router; A processor, configured to determine the network connection information of the old router according to the data packet. The router according to claim 8, wherein the network connection information includes: one or more of authentication information, network connection mode or Internet Protocol IP address. The router according to claim 9, wherein the processor is used for: If the data message is an Ethernet message and is a broadcast message, and the data message includes a point-to-point protocol PPPoE message on the Ethernet, then it is determined that the network connection mode of the old router is a dial-up authentication mode; Accept the PPPoE session initiated by the old router; wherein, the router works in PPPoE Server Server mode; In the PPPoE session process between the router and the old router, the authentication information of the old router is acquired. The router according to claim 9, wherein the processor is used for: If the data message is an Ethernet message and is a broadcast message, and the data message includes a DHCP broadcast message, it is determined that the network connection mode of the old router is a dynamic address allocation mode. The router according to claim 9, wherein the processor is used for: If the data message is an Ethernet message and is a non-broadcast message, and the data message includes an IP message, determine whether the source address of the IP message is legal; If the source address of the IP message is legal, then determine that the network connection mode of the old router is a static address mode, and the IP address is the source address of the IP message. The router according to claim 10, wherein the processor is further used for: After obtaining the authentication information of the old router, the router is switched from the PPPoE Server mode to the PPPoE client client mode; In the PPPoE client mode, use the obtained network connection information for network connection. The router according to any one of claims 8-13, wherein the processor is further configured to: After the LAN interface receives the data message, record the source MAC address of the data message, and set the source MAC address as the MAC address of the WAN interface of the router. A router, characterized in that, the router has the ability to obtain the network connection information of the old router, and the router includes: A receiving module, configured to receive a data message through the LAN interface of the router, the data message includes an Ethernet message sent by the old router to the LAN interface of the router through the WAN interface of the old router; A processing module, configured to determine the network connection of the old router according to the data packet information. The router according to claim 15, wherein the network connection information includes: one or more of authentication information, network connection mode or Internet Protocol IP address. The router according to claim 16, wherein the processing module is used for: If the data message is an Ethernet message and is a broadcast message, and the data message includes a point-to-point protocol PPPoE message on the Ethernet, then it is determined that the network connection mode of the old router is a dial-up authentication mode; Accept the PPPoE session that described old router initiates; Wherein, described router works in PPPoE server Server pattern; In the PPPoE session process between the router and the old router, the authentication information of the old router is acquired. The router according to claim 16, wherein the processing module is used for: If the data message is an Ethernet message and is a broadcast message, and the data message includes a DHCP broadcast message, it is determined that the network connection mode of the old router is a dynamic address allocation mode. The router according to claim 16, wherein the processing module is used for: If the data message is an Ethernet message and is a non-broadcast message, and the data message includes an IP message, determine whether the source address of the IP message is legal; If the source address of the IP message is legal, then determine that the network connection mode of the old router is a static address mode, and the IP address is the source address of the IP message. The router according to claim 17, wherein the processing module is also used for: After obtaining the authentication information of the old router, the router is switched from the PPPoE Server mode to the PPPoE client client mode; In the PPPoE client mode, use the obtained network connection information for network connection. The router according to any one of claims 15-20, wherein the processing module is further used for: After the LAN interface receives the data message, record the source media access control of the data message Control the MAC address, and set the source MAC address as the MAC address of the WAN interface of the router.