CN106301997A - Gateway device response to network connectedness method and apparatus - Google Patents

Abstract

The invention discloses a kind of gateway device response to network connectedness method, when receiving control protocol message i.e. icmp message between the net that terminal sends, line card obtains ip address, source and the purpose ip address of described icmp message；Mate with the ip address of the gateway device at its place in described purpose ip address, and when ip address, described source is mated with the IP address in the routing table of described gateway device, described line card generates response icmp message based on described icmp message；Described line card feeds back described response icmp message to described terminal.The invention also discloses a kind of gateway device response to network connectivity means.The present invention improves the speed of gateway device response terminal ping request.

Description

Gateway device response network connectivity method and device

technical field

The invention relates to the field of computer communication, in particular to a gateway device response network connectivity method and device.

Background technique

Network connectivity detection technology ping technology is a technology used to test network connectivity in ip network. At present, the gateway equipment used as the operator or enterprise data center is basically composed of the main control and the line card. When the gateway equipment receives the ping request sent by the terminal, it basically obtains the control protocol message of the terminal through the line card. icmp message, and then the line card will report the obtained icmp message to the main control for processing, and when a large number of end users ping the gateway device at the same time, and other protocol messages are also processed in the main control, the main control of the gateway device The utilization rate of the controller will increase, causing the master controller to take too long to process the icmp message, and the time to respond to the terminal ping request is also prolonged, thereby reducing the speed of the gateway device responding to the terminal ping request.

Contents of the invention

The main purpose of the present invention is to propose a gateway device response network connectivity method and device, aiming to solve the technical problem that the gateway device responds to the terminal ping request at a low speed when a large number of terminal users ping the gateway device at the same time.

In order to achieve the above object, the present invention provides a gateway device response network connectivity method, the gateway device response network connectivity method includes the following steps:

When receiving the Internet control protocol message sent by the terminal, that is, the icmp message, the line card obtains the source ip address and the destination ip address of the icmp message;

When the destination ip address matches the ip address of the gateway device where it is located, and the source ip address matches the IP address in the routing table of the gateway device, the line card generates a response icmp based on the icmp message message;

The line card feeds back the response icmp message to the terminal.

Preferably, the step of generating a response icmp message based on the icmp message by the line card includes:

The line card calculates the checksum of the icmp message and determines whether the checksum is 0;

If the checksum is 0, the line card exchanges the source ip address and the destination ip address of the icmp message;

The line card calculates the checksum of the icmp header in the icmp message after the ip address is exchanged, and writes the calculated checksum into the corresponding position of the icmp header;

The line card calculates the checksum of the entire icmp message, and writes the calculated checksum into the corresponding position of the icmp message;

The line card uses the mac address of the network device as the source mac address and the mac address corresponding to the terminal as the destination mac address, and encapsulates the source mac address and the destination mac address into the icmp message, To generate a response icmp message.

Preferably, the step of feeding back the response icmp message to the terminal by the line card includes:

The line card looks up the output port of the next hop table corresponding to the source ip address in the routing table;

The line card sends the response icmp message to the terminal through the output port.

Preferably, when the Internet control protocol message sent by the terminal is received, that is, the icmp message, before the line card obtains the source ip address and the destination ip address of the icmp message, the gateway device responds Network connectivity methods include:

When receiving the message sent by the terminal, the line card detects whether the gateway device is in the mode of quickly responding to the icmp message;

If it is detected that the gateway device is in the mode of quickly responding to icmp messages, the line card judges whether the currently received message is an icmp message.

Preferably, the gateway device response network connectivity method further includes:

When receiving the message sent by the terminal and the message is not an icmp message, the line card sends the received message to the main control, so that the main control responds to the message.

In addition, in order to achieve the above purpose, the present invention also proposes a gateway device responding network connectivity device, the gateway device responding network connectivity device comprising:

The obtaining module is used to obtain the source ip address and the destination ip address of the icmp message when receiving the Internet control protocol message sent by the terminal, that is, the icmp message;

A generating module, configured to generate a response based on the icmp message when the destination ip address matches the ip address of the gateway device where the destination ip address is located, and the source ip address matches the ip address in the routing table of the gateway device icmp message;

A feedback module, configured to feed back the response icmp message to the terminal.

Preferably, the generating module includes:

A calculation unit, configured to calculate the checksum of the icmp message and determine whether the checksum is 0;

an exchange unit, configured to exchange the source ip address and the destination ip address of the icmp message if the checksum is 0;

The processing unit is used to calculate the checksum of the icmp message header in the icmp message after the ip address is exchanged, and write the calculated checksum into the corresponding position of the icmp message header;

The processing unit is also used to calculate the checksum of the entire icmp message, and write the calculated checksum into the corresponding position of the icmp message;

A generating unit, configured to use the mac address of the network device as the source mac address and the mac address corresponding to the terminal as the destination mac address, and encapsulate the source mac address and the destination mac address into the icmp message , to generate a response icmp message.

Preferably, the feedback module includes:

A lookup unit, configured to look up the output port of the next hop table corresponding to the source ip address in the routing table;

A sending unit, configured to send the response icmp message to the terminal through the output port.

Preferably, the gateway device response network connectivity device further includes:

A detection module, configured to detect whether the gateway device is in the quick response icmp message mode when receiving the message sent by the terminal;

The judging module is used to judge whether the currently received message is an icmp message if it is detected that the gateway device is in the fast response icmp message mode.

Preferably, the gateway device response network connectivity device further includes:

The processing module is configured to send the received message to the main control when the message sent by the terminal is received and the message is not an icmp message, so that the main control can respond to the message.

In the gateway device response network connectivity method and device proposed by the present invention, the line card of the gateway device first obtains the source ip address and the destination ip address of the icmp message, then processes the icmp message to generate a response icmp message, and finally Send the response icmp message to the terminal to respond to the request of the terminal to ping the gateway device, instead of obtaining the icmp message of the terminal through the line card, and then the line card reports the obtained icmp message to the main control for processing, Because the main control has to process various messages, it takes longer to respond to icmp messages, and the method of directly processing icmp messages and sending them to the terminal through the line card improves the speed of the gateway device responding to the ping request of the terminal.

Description of drawings

FIG. 1 is a schematic flowchart of a first embodiment of a gateway device response network connectivity method according to the present invention;

Fig. 2 is a schematic flow diagram of a preferred embodiment of the line card generating a response icmp message based on the icmp message of the present invention;

Fig. 3 is a flow diagram of a preferred embodiment of the line card feeding back the response icmp message to the terminal in the present invention;

4 is a schematic flowchart of a fourth embodiment of a method for a gateway device responding to network connectivity according to the present invention;

FIG. 5 is a schematic diagram of functional modules of the first embodiment of the gateway device response network connectivity device of the present invention;

Fig. 6 is a schematic diagram of a preferred embodiment of the generation module in Fig. 5, which refines the functional modules;

Fig. 7 is a schematic diagram of a preferred embodiment of the feedback module in Fig. 5 and refines the functional modules;

FIG. 8 is a schematic diagram of functional modules of a fourth embodiment of an apparatus for a gateway device responding to network connectivity according to the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The invention provides a gateway device response network connectivity method.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a first embodiment of a method for a gateway device responding to network connectivity according to the present invention.

This embodiment proposes a method for a gateway device to respond to network connectivity, and the method for the gateway device to respond to network connectivity includes:

Step S10, when receiving the Internet control protocol message sent by the terminal, that is, the icmp message, the line card obtains the source ip address and the destination ip address of the icmp message;

In this embodiment, if the message sent by the terminal is received as an icmp message, the line card first extracts the pointer of the icmp message, and the pointer is a pointer of a layer 2 message header, which needs to be offset by 12 byte, pointing to the vlan field of the message, and the line card judges whether the icmp message is a message of the multi-vlan tag type, and further obtains the number of the vlan tags of the icmp message. It can be understood that the icmp The source mac address and the destination mac address of the message each occupy 6 bytes, a total of 12 bytes, and a vlan occupies 4 bytes, and then multiplied by the number of vlan tags to get the total number of bytes occupied by the vlan information, so mac The total number of bytes occupied by the address plus vlan is the offset of the Layer 3 header relative to the Layer 2 header. The Layer 2 header pointer of the packet plus this offset points to the Layer 3 information of the packet. Header, the first 4 bytes of the layer 3 information header is the destination ip address of the message, and the 5-8 bytes are the source ip address of the message. In this way, we can get the source ip and destination ip of the message address.

Step S20, when the destination ip address matches the ip address of the gateway device where it is located, and the source ip address matches the IP address in the routing table of the gateway device, the line card based on the icmp message Generate a response icmp message;

In this embodiment, the step S20 includes the steps of:

Step A, the line card judges whether the destination ip address is the gateway ip address of the gateway device where it is located;

In this embodiment, the preferred way for the line card to determine whether the destination ip address is the gateway ip address of the gateway device is as follows: after the line card obtains the destination ip of the icmp message, it determines whether the ip is the gateway ip. Generally speaking, when configuring the gateway ip, the gateway device will issue the host route to the hardware chip routing table, that is, the gateway ip of the gateway device, and the gateway device will also save a copy of the same record in the software routing table, different types The ip will have different types of marks, the gateway ip will be marked as a local ip by the device, and the loopback port address of the gateway will also have a loopback (loopback address) mark. Use the destination ip to search the software routing table. If the ip is found in the host routing table, and the ip ID is the local ip ID or the loopback ID, it proves that the icmp message is for other devices to ping the gateway ip address. We need Perform fast packet return processing, that is, a response to a ping request is required.

Step B, the line card judges whether the source IP address exists in the routing table of the gateway device;

In this embodiment, the preferred way for the line card to determine whether the source ip address exists in the routing table of the gateway device is: the line card determines whether the source ip address of the icmp message is in the routing table of the gateway device , the purpose of doing this is to judge that after the source ip address and the destination ip address are swapped in the follow-up, the destination ip of the last sent message (that is, the source ip of the received icmp message) can find the corresponding routing table, That is, the actual egress port can be found. Further, if it is judged that the source ip address is not in the routing table of the gateway device, then the subsequent process will not be continued, but the icmp message will be sent to the master for processing.

Step C, the line card processes the icmp message to generate a corresponding icmp message.

In this embodiment, preferably, the line card calculates and checks the checksum of the icmp message, and exchanges the source ip address and the destination ip address according to the checksum check result, so as to The destination ip of the icmp message sent out at last (i.e. the source ip of the received icmp message) can find the corresponding routing table, that is, the actual output port can be found, and finally, the line card obtains the ip of the network device The source mac address and the destination mac address of the routing table are encapsulated into the icmp message to generate a response icmp message. Step S30, the line card feeds back the response icmp message to the terminal.

In the gateway device response network connectivity method proposed in this embodiment, the line card of the gateway device first obtains the source ip address and the destination ip address of the icmp message, then processes the icmp message to generate a response icmp message, and finally The response icmp message is sent to the terminal in response to the request of the terminal to ping the gateway device, instead of obtaining the icmp message of the terminal through the line card, and then the line card reports the obtained icmp message to the main control for processing, because The main control has to process various messages, so the time to respond to icmp messages will be longer, and the method of directly processing icmp messages and sending them to the terminal through the line card improves the speed of the gateway device responding to the terminal ping request.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, a second embodiment of the method for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, referring to FIG. 2, the step S20 includes :

Step S21, the line card calculates the checksum of the icmp message and determines whether the checksum is 0;

In this embodiment, the line card first calculates the checksum of the icmp message and judges whether the checksum is 0. The specific algorithm is: regard the header of the icmp message as a number composed of 16 bits, and then Perform binary one’s complement summation. For example, the header of the currently acquired icmp message is a 32-bit number. Divide the 32 number into two hexadecimal numbers, perform binary one’s complement calculations, and sum the calculated structures ; Then check whether the result of the calculated checksum is 0, if it is not 0, it means that the checksum is wrong and no subsequent processing will be performed, and an error will be returned, that is, the following steps will be stopped.

Step S22, if the checksum is 0, the line card exchanges the source ip address and the destination ip address of the icmp message;

In this embodiment, the line card obtains the source ip address and the destination ip address of the message according to the previously found layer 3 header pointer information pointing to the message, and then writes the changed destination ip address into the layer 3 pointer In the first 4 bytes of the message, write the changed source ip address into the 5 to 8 bytes of the layer 3 pointer offset, thus completing the exchange of the source ip address and the destination ip address of the message.

Step S23, the line card calculates the checksum of the icmp header in the icmp message after the ip address is exchanged, and writes the calculated checksum into the corresponding position of the icmp header;

In this embodiment, the line card recalculates the checksum of the message after the source ip address and the destination ip address have been exchanged, and the calculation algorithm is: the data to be checked is regarded as 16-bit The number of the unit is composed of numbers, and the binary one's complement is summed sequentially; the obtained result is stored in the corresponding position of the icmp message header.

Step S24, the line card calculates the checksum of the entire icmp message, and writes the calculated checksum into the corresponding position of the icmp message;

In this embodiment, the line card can also set the ttl value of the ip message in advance, preferably the ttl value is set to a default value of 255. It can be understood that the time to live field of the ip message is specified The maximum number of network segments allowed to pass before the ip packet is discarded by the router is set to the default value of 255, and the checksum of the entire ip packet is calculated again, and the calculated checksum is written to the corresponding position of the icmp message.

Step S25, the line card uses the mac address of the network device as the source mac address and the mac address corresponding to the terminal as the destination mac address, and encapsulates the source mac address and the destination mac address into the icmp report In the text, to generate a response icmp message.

In this embodiment, the way the line card encapsulates the source mac address and the destination mac address into the icmp message is preferably that the line card first adds the next hop table associated with the routing table mac address to the destination mac address of the icmp message, add the gateway mac address of the gateway device to the source mac address of the icmp message, and then use the corresponding IP address in the gateway device according to the source ip address of the icmp message The next hop table of the routing table, find the next hop table of the routing table of the source ip address, use the next hop table found as the outgoing port, and encapsulate the source mac address and the destination mac address The icmp message is sent to the terminal to complete the response to the terminal's request to ping the gateway device.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, a third embodiment of the method for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, referring to FIG. 3 , the step S30 includes :

Step S31, the line card looks up the output port of the next hop table corresponding to the source ip address in the routing table;

Step S32, the line card sends the response icmp message to the terminal through the output port.

In this embodiment, it can be understood that the address information corresponding to the source ip address is stored in the routing table, but the address information is not the outgoing port corresponding to the source ip address, that is, the address information in the routing table is a fast response The index information of the icmp message, when the address information corresponding to the source ip address is found in the routing table, index to the next hop table according to the address information, and confirm that the corresponding position in the next hop table is The output port that responds to icmp packets.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, a fourth embodiment of the method for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, refer to FIG. 4, before the step S10 , the gateway device response network connectivity method includes:

Step S40, when receiving the message sent by the terminal, the line card detects whether the gateway device is in the quick response icmp message mode;

Step S50, if it is detected that the gateway device is in the fast response icmp message mode, the line card judges whether the currently received message is an icmp message.

In this embodiment, before step S40, it includes the step of configuring and enabling the quick response ping request command, that is, the user can trigger the command of the quick response ping gateway device through the command of the quick response icmp message, when the user is in the mode of the quick response ping gateway device When receiving the ping request sent by the terminal, the gateway device will trigger the command and enter the process of quickly processing the icmp message; if it detects that the gateway device is in the mode of quickly responding to the icmp message, the line card Whether the message is an icmp message, that is, the line card first obtains the message corresponding to the terminal, and judges whether the obtained message is an icmp message, and determines whether the obtained message is an icmp message The method is preferably judged by the acl rule (a kind of access control technology), and the method of using the acl judgment is preferably to obtain the unique identifier of the message such as the protocol number. According to the obtained protocol number, it can be judged whether the type of the currently obtained message is Matches the type of the icmp message. If it matches, the line card can determine that the received message is an icmp message. And carry out the process of quickly responding to the ping request. If not, enter the normal processing flow of the message, that is, obtain the message through the line card, and then send the obtained message to the main control, and perform a series of response processes through the main control.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, a fifth embodiment of the method for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, the gateway device responds to the network connectivity method Also includes:

When receiving the message sent by the terminal and the message is not an icmp message, the line card sends the received message to the main control, so that the main control responds to the message.

In this embodiment, preferably, it is judged whether the received icmp message is received, and if not, the main control is sent according to a normal process for the main control to respond to the message.

The present invention further provides a gateway device responding network connectivity device.

Referring to FIG. 5 , FIG. 5 is a schematic diagram of functional modules of a preferred embodiment of an apparatus for responding to network connectivity of a gateway device according to the present invention.

It should be emphasized that, for those skilled in the art, the functional block diagram shown in FIG. 5 is only an example diagram of a preferred embodiment, and those skilled in the art respond to the network connectivity device shown in FIG. 5 Functional modules can easily supplement new functional modules; the names of each functional module are self-defined names, which are only used to assist in understanding the various program function blocks of the gateway device responding to the network connectivity device, and are not used to limit the technical solution of the present invention , the core of the technical solution of the present invention is the functions to be achieved by the function modules with self-defined names.

This embodiment proposes a device for responding to network connectivity of a gateway device. The device for responding to network connectivity of a gateway device includes:

Obtaining module 10, is used for when receiving the Internet Control Protocol message that terminal sends, i.e. icmp message, obtains the source ip address and destination ip address of described icmp message;

In this embodiment, if the received message sent by the terminal is an icmp message, the acquisition module 10 first extracts the pointer of the icmp message, and the pointer is a pointer of a layer 2 message header, which needs to be passed through the offset 12 bytes point to the vlan field of the message, and then judge whether the icmp message is a message of multiple vlan tag types, and the acquisition module 10 further obtains the number of the vlan tags of the icmp message, it can be understood that , the source mac address and the destination mac address of the icmp message each occupy 6 bytes, a total of 12 bytes, and a vlan occupies 4 bytes, and then multiplied by the number of vlan tags to get the total number of bytes occupied by the vlan information, In this way, the total number of bytes occupied by the mac address plus vlan is the offset of the layer 3 packet header relative to the layer 2 packet header, and the layer 2 header pointer of the packet plus this offset points to the 3 Layer information header, the first 4 bytes of the layer 3 information header is the destination ip address of the message, and the 5-8 bytes are the source ip address of the message. In this way, we can get the source ip and Destination IP address.

A generating module 20, configured to generate based on the icmp message when the destination ip address matches the ip address of the gateway device where it is located, and the source ip address matches the IP address in the routing table of the gateway device Respond to icmp message;

In this embodiment, the generating module 20 includes:

A judging unit, configured to judge whether the destination ip address is the gateway ip address of the gateway device where it is located;

In this embodiment, the judging unit judges whether the destination ip address is the gateway ip address of the gateway device. The preferred method is: after the acquisition module 10 obtains the destination ip of the icmp message, the judging unit judges whether the ip is a gateway ip. Generally speaking, when configuring the gateway ip, the gateway device will issue the host route to the hardware chip routing table, that is, the gateway ip of the gateway device, and the gateway device will also save a copy of the same record in the software routing table, different types The ip will have different types of marks, the gateway ip will be marked as a local ip by the device, and the loopback port address of the gateway will also have a loopback (loopback address) mark. Use the destination ip to search the software routing table. If the ip is found in the host routing table, and the ip ID is the local ip ID or the loopback ID, it proves that the icmp message is for other devices to ping the gateway ip address. We need Perform fast packet return processing, that is, a response to a ping request is required.

The judging unit is also used to judge whether the source IP address exists in the routing table of the gateway device;

In this embodiment, the preferred way for the judging unit to judge whether the source ip address exists in the routing table of the gateway device is: the judging unit judges whether the source ip address of the icmp message is in the routing table of the gateway device , the purpose of doing this is to judge that after the source ip address and the destination ip address are swapped in the follow-up, the destination ip of the last sent message (that is, the source ip of the received icmp message) can find the corresponding routing table, That is, the actual egress port can be found. Further, if the judging unit judges that the source ip address is not in the routing table of the gateway device, it will not continue the following process, but send the icmp message to the master for processing.

A generating unit, configured to process the icmp message to generate a corresponding icmp message.

In this embodiment, it is preferred that the generating unit calculates and checks the checksum of the icmp message, and exchanges the source ip address and the destination ip address according to the checksum check result, so as to The destination ip of the icmp message sent out at last (i.e. the source ip of the received icmp message) can find the corresponding routing table, that is, the actual output port can be found, and finally, the source mac address and the source mac address of the network device are obtained The destination mac address of the routing table encapsulates the source mac address and destination mac address into the icmp message for the generation unit to generate a response icmp message.

In the gateway device response network connectivity device proposed in this embodiment, the line card of the gateway device first obtains the source ip address and the destination ip address of the icmp message, then processes the icmp message to generate a response icmp message, and finally The response icmp message is sent to the terminal in response to the request of the terminal to ping the gateway device, instead of obtaining the icmp message of the terminal through the line card, and then the line card reports the obtained icmp message to the main control for processing, because The main control has to process various messages, so the time to respond to icmp messages will be longer, and the method of directly processing icmp messages and sending them to the terminal through the line card improves the speed of the gateway device responding to the terminal ping request.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, the second embodiment of the device for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, referring to FIG. 6, the generation module 20 include:

Calculation unit 21, for calculating the checksum of the icmp message and judging whether the checksum is 0;

In the present embodiment, calculation unit 21 first calculates the checksum of the icmp message and judges whether the checksum is 0. The specific algorithm is as follows: the header of the icmp message is regarded as a 16-bit number, Carry out binary one’s complement summation sequentially. For example, the header of the currently acquired icmp message is a 32-bit number, divide the 32 number into two hexadecimal numbers, perform binary one’s complement calculation respectively, and calculate the calculated structure and; then check whether the result of the calculated checksum is 0, if it is not 0, it means that the checksum is wrong and no subsequent processing will be performed, and an error will be returned, that is, the following steps will be stopped.

The exchange unit 22 is used to exchange the source ip address and the destination ip address of the icmp message if the checksum is 0;

In this embodiment, the exchange unit 22 obtains the source ip address and the destination ip address of the message according to the layer 3 header pointer information found before the message, and then writes the changed destination ip address into 3 In the first 4 bytes of the layer pointer, write the changed source ip address into the 5 to 8 bytes of the layer 3 pointer offset, thus completing the exchange of the source ip address and the destination ip address of the message.

The processing unit 23 is used to calculate the checksum of the icmp header in the icmp message after the ip address is exchanged, and write the calculated checksum into the corresponding position of the icmp header;

In this embodiment, the processing unit 23 recalculates the checksum of the message after the source ip address and the destination ip address have been exchanged, and the calculation algorithm is: regard the data to be checked as 16-bit Composed of numbers in unit, perform binary one's complement summation sequentially; store the obtained result in the corresponding position of the icmp message header.

The processing unit 23 is also used to calculate the checksum of the entire icmp message, and write the calculated checksum to the corresponding position of the icmp message;

In this embodiment, the processing unit 23 can also set the ttl value of the ip message in advance, preferably the ttl value is set to a default value of 255. It can be understood that the time to live field of the ip message is Specify the maximum number of network segments allowed to pass before the ip packet is discarded by the router, set the default value to 255, and calculate the checksum of the entire ip packet again, and write the calculated checksum to the corresponding position of the icmp packet.

A generating unit 24, configured to use the mac address of the network device as the source mac address and the mac address corresponding to the terminal as the destination mac address, and encapsulate the source mac address and the destination mac address into the icmp message to generate a response icmp message.

In this embodiment, the method of first encapsulating the source mac address and the destination mac address into the icmp message is preferably that the generating unit 24 first adds the mac address of the routing table to the destination mac of the icmp message In the address, add the gateway mac address of the gateway device to the source mac address of the icmp message, and then search according to the next hop table of the corresponding routing table in the gateway device according to the source ip address of the icmp message To the next hop table of the routing table of the source ip address, using the found next hop table as an outgoing port, and sending the icmp message encapsulating the source mac address and the destination mac address to the terminal to complete Respond to the request of the terminal to ping the gateway device.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, a third embodiment of the device for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, referring to FIG. 7, the feedback module 30 include:

A lookup unit 31, configured to look up the output port of the next hop table corresponding to the source ip address in the routing table;

A sending unit 32, configured to send the response icmp message to the terminal through the output port.

In this embodiment, it can be understood that the address information corresponding to the source ip address is stored in the routing table, but the address information is not the outgoing port corresponding to the source ip address, that is, the address information in the routing table is a fast response The index information of the icmp message, when the address information corresponding to the source ip address is found in the routing table, the search unit 31 indexes into the next hop table according to the address information, and confirms that the corresponding The location of is the output port of the response icmp message.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, the fourth embodiment of the device for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, referring to FIG. 8, the gateway device responds to The network connectivity unit also includes:

The detection module 40 is used to detect whether the gateway device is in the quick response icmp message mode when receiving the message sent by the terminal;

The judging module 50 is configured to judge whether the currently received packet is an icmp packet if it is detected that the gateway device is in the fast response icmp packet mode.

In this embodiment, the detection module 40 also includes a configuration unit, configured to enable the quick response ping request, that is, the user can trigger the quick response ping gateway device instruction through the quick response icmp message instruction, when the user is in the quick response ping gateway In the mode of the device, when receiving the ping request sent by the terminal, the gateway device will trigger the instruction and enter the process of quickly processing the icmp message; if it is detected that the gateway device is in the fast response icmp message mode, the judgment module 50 judges Whether the currently received message is an icmp message, that is, first obtain the message corresponding to the terminal, and judge whether the obtained message is an icmp message, and determine whether the obtained message is an icmp message The way of text is preferably judged by acl rule (a kind of access control technology), and the mode of using acl judgment is preferably obtained by obtaining the unique identifier of the message such as the protocol number, and the currently obtained message can be judged according to the obtained protocol number Whether the type matches the type of the icmp message, if so, the judging module 50 can judge that the received message is an icmp message. And carry out the process of quickly responding to the ping request, if not, enter the normal processing flow of the message, that is, obtain the message through the line card, and then send the obtained message to the main control, and perform a series of response processes through the main control.

Further, in order to increase the flexibility of the gateway device responding to the network connectivity, based on the first embodiment, a fifth embodiment of the device for the gateway device responding to the network connectivity of the present invention is proposed. In this embodiment, the gateway device responds to the network connectivity device Also includes:

The processing module is configured to send the received message to the main control when the message sent by the terminal is received and the message is not an icmp message, so that the main control can respond to the message.

In this embodiment, preferably, the processing module judges whether the received icmp message is received, and if not, sends the master control according to a normal process for the master control to respond to the message.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to make a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in various embodiments of the present invention.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. a gateway device response to network connectedness method, it is characterised in that described gateway device responds Network connectivty method comprises the following steps:

When receiving control protocol message i.e. icmp message between the net that terminal sends, line card obtains described The ip address, source of icmp message and purpose ip address；

Mate with the ip address of the gateway device at its place in described purpose ip address, and ip address, described source When mating with the IP address in the routing table of described gateway device, described line card is raw based on described icmp message Become response icmp message；

Described line card feeds back described response icmp message to described terminal.

2. gateway device response to network connectedness method as claimed in claim 1, it is characterised in that institute State line card step based on described icmp message generation response icmp message to include:

Whether described line card calculates the verification of described icmp message and and judges described verification and be 0；

If described verification and be 0, described line card exchanges ip address, source and purpose ip of described icmp message Address；

Described line card calculate exchange icmp heading in the icmp message behind ip address verification and, and will The position that verification after calculating is corresponding with being written to icmp heading；

Described line card calculate whole icmp message verification and, and will calculate after verification and be written to icmp The position that message is corresponding；

Described line card using the mac address of the described network equipment as mac address, source and by described terminal pair The mac address answered is as purpose mac address, and is encapsulated in mac address, described source and purpose mac address To described icmp message, to generate response icmp message.

3. gateway device response to network connectedness method as claimed in claim 1, it is characterised in that institute The step stating the line card described response icmp message of feedback extremely described terminal includes:

Described line card searches the output port of next skip list corresponding with ip address, described source in routing table；

Described response icmp message is sent to terminal by described output port by described line card.

4. gateway device response to network connectedness method as claimed in claim 1, it is characterised in that institute Stating when receiving control protocol message i.e. icmp message between the net that terminal sends, described line card obtains described Before the ip address, source of icmp message and the step of purpose ip address, described gateway device response to network connects Property method includes:

When receiving the message that terminal sends, described line card detects whether described gateway device is in quickly Response icmp message pattern；

If detecting, gateway device is in quickly response icmp message pattern, and described line card judges current reception To message whether be icmp message.

5. the gateway device response to network connectedness method as described in any one of claim 1-4, its feature Being, described gateway device response to network connectedness method also includes:

Receiving the message that terminal sends, and when described message is not icmp message, described line card will connect The message received is sent to master control, responds described message for master control.

6. a gateway device response to network connectivity means, it is characterised in that described gateway device responds Network connectivty device includes:

Acquisition module, is used for when receiving control protocol message i.e. icmp message between the net that terminal sends, Obtain ip address, source and the purpose ip address of described icmp message；

Generation module, for mating with the ip address of the gateway device at its place in described purpose ip address, And ip address, described source is when mating with the IP address in the routing table of described gateway device, based on described icmp Message generates response icmp message；

Feedback module, is used for feeding back described response icmp message to described terminal.

7. gateway device response to network connectivity means as claimed in claim 6, it is characterised in that institute State generation module to include:

Whether computing unit, for calculating the verification of described icmp message and and judging described verification and be 0；

Exchange unit, if for described verification and be 0, exchanging ip address, source and the mesh of described icmp message Ip address；

Processing unit, for calculate the verification exchanging icmp heading in the icmp message behind ip address and, And the verification position corresponding with being written to icmp heading after calculating；

Described processing unit, be additionally operable to calculate whole icmp message verification and, and the verification after calculating The position corresponding with being written to icmp message；

Signal generating unit, is used for the mac address of the described network equipment as mac address, source and by described Mac address corresponding to terminal is as purpose mac address, and by mac address, described source and purpose mac ground In location encapsulation extremely described icmp message, to generate response icmp message.

8. gateway device response to network connectivity means as claimed in claim 6, it is characterised in that institute State feedback module to include:

Search unit, for searching the outfan of next skip list corresponding with ip address, described source in routing table Mouthful；

Transmitting element, for being sent to terminal by described response icmp message by described output port.

9. gateway device response to network connectivity means as claimed in claim 6, it is characterised in that institute State gateway device response to network connectivity means also to include:

Detection module, for when receiving the message that terminal sends, detecting whether described gateway device is located In quickly response icmp message pattern；

Judge module, if for detecting that gateway device is in quickly response icmp message pattern, it is judged that when Before the message that receives whether be icmp message.

10. the gateway device response to network connectivity means as described in any one of claim 6-9, its feature Being, described gateway device response to network connectivity means also includes:

Processing module, for receiving the message that terminal sends, and when described message is not icmp message, The message received is sent to master control, responds described message for master control.