WO2016058429A1

WO2016058429A1 - Processing method and device for unicast data package

Info

Publication number: WO2016058429A1
Application number: PCT/CN2015/084951
Authority: WO
Inventors: 黄金虎; 张海; 何鹏
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-10-15
Filing date: 2015-07-23
Publication date: 2016-04-21
Also published as: CN105577550A

Abstract

Disclosed are a processing method and device for a unicast data package. The method comprises: monitoring whether a network card receives a unicast data package which does not belong thereto; after it is monitored that the unicast data package is received, parsing out a destination IP of the unicast data package; and sending a request packet to a host to which the destination IP belongs, wherein the request packet is used for requesting feedback of a MAC address for a corresponding destination host in the unicast data package. By means of the present invention, the problem in the related art of the harmful effect on a network due to unicast package flooding is effectively solved, so as to effectively eliminate the unicast package flooding on the destination MAC by various switches in the network.

Description

Method and device for processing unicast data packet

Technical field

The present invention relates to the field of mobile communications, and in particular, to a method and an apparatus for processing a unicast data packet.

Background technique

In an Ethernet LAN, for unknown unicast, the switch floods out from each port. Unknown unicast, that is, the entry corresponding to the destination MAC of the unicast frame in the MAC forwarding table of the switch. Therefore, when the switch receives the unknown unicast data packet from a certain port, the switch floods all the ports except the receiving port, which is the unicast flooding of the switch. If the switch has not learned the destination MAC, it will continue to flood the packet for this destination MAC for this MAC. In this abnormal situation, continuous flooding consumes network bandwidth, affects network patency, and consumes the network card, CPU (Central Processing Unit), and other comprehensive performance resources of the terminal, resulting in slow or even stuck operation of the terminal.

In view of the problem that the unicast packet flooding has adverse effects on the network in the related art, an effective solution has not been proposed yet.

Summary of the invention

For the problem that the unicast packet flooding has a bad influence on the network in the related art, the embodiment of the present invention provides a method and a device for processing a unicast data packet, which are used to solve the above technical problem.

According to an aspect of the present invention, an embodiment of the present invention provides a method for processing a unicast data packet, where the method includes: monitoring whether a network card receives a unicast data packet that does not belong to itself; After the data packet is broadcast, the destination IP address of the unicast data packet is parsed; the request packet is sent to the host to which the destination IP belongs; wherein the request packet is used to request the corresponding destination host in the unicast data packet. MAC address feedback.

Optionally, the method further includes: establishing a unicast flooding data set to be cleaned, wherein the unicast flooding data set to be cleaned is recorded Destination MAC.

Optionally, the sending the request message to the host to which the destination IP belongs includes: after the first time the request packet is sent to the host to which the destination IP belongs, the first condition is met: the current time-request message sending time is ≥ the first preset time; The sending time of the request message is the time when the request message is sent to the host for the previous time; if yes, the request message is resent to the host; if not, the real-time monitoring continues to meet the first condition.

Optionally, before the real-time monitoring whether the first condition is met, the method further includes: determining the unicast flood data set to be cleaned, and recording the destination MAC of the host.

Optionally, the sending the request message to the host to which the destination IP belongs includes: real-time monitoring whether the second condition is met: the current time-unicast data packet receiving time ≥ the second preset time; wherein the unicast data packet receiving time The time when the NIC received the unicast data packet the previous time; if yes, the destination MAC address corresponding to the unicast data packet is cleared from the unicast flooding data set to be cleaned; if not, Continue to monitor in real time whether the second condition is met.

According to another aspect of the present invention, an embodiment of the present invention further provides a processing apparatus for a unicast data packet, where the apparatus includes: a data packet monitoring module, configured to monitor whether the network card receives unicast data that is not his own. a packet parsing module, configured to parse the destination IP address of the unicast data packet after receiving the unicast data packet, and set the packet sending module to send a request packet to the host to which the destination IP belongs; The request message is used to request MAC address feedback for the corresponding destination host in the unicast data packet.

Optionally, the device further includes: a data set establishing module, configured to: before monitoring whether the network card receives the unicast data packet that is not owned by itself, establishing a unicast flooding data set to be cleaned; wherein the to-be-cleaned list The broadcast flood data centrally records the destination MAC.

Optionally, the packet sending module includes: a first condition determining unit, configured to monitor whether the first condition is met after the first time the request packet is sent to the host to which the destination IP belongs: the current time-request message sending time ≥ a preset time; wherein the request message sending time is a time when the request message is sent to the host for the previous time; the first processing unit is configured to resend the message to the host if the determination result is yes Requesting a message; if the judgment result is no, continuing to monitor in real time whether the first condition is satisfied.

Optionally, the message sending module further includes:

The record determining unit is configured to determine, in the real-time monitoring, whether the first condition is that the first condition determining unit meets the first condition, the unicast flooding data set to be cleaned, and record the destination MAC of the host.

Optionally, the message sending module further includes: a second condition determining unit configured to monitor whether the second condition is met in real time: the current time-unicast data packet receiving time ≥ the second preset time; wherein the single time The broadcast packet receiving time is the time when the network card receives the unicast data packet the previous time; the second processing unit is configured to set the destination MAC corresponding to the unicast data packet if the determination result is yes. And clearing from the unicast flood data set to be cleaned; if the judgment result is no, continuing to monitor whether the second condition is met in real time.

The purpose of the embodiment of the present invention is to provide a method for eliminating unicast flooding in a local area network by using an IP terminal, and automatically detecting, in an IP terminal, whether the network card of the terminal receives a unicast data packet of a network card other than the IP terminal in real time. Then, the destination IP address of the unicast data packet is parsed, and then an ARP request packet or a ping packet is sent to the host to which the destination IP belongs. In this way, the host to which the destination IP belongs will reply to the arp request packet or the ping packet, and the reply packets will pass through the switch in the network, so that the switches learn the MAC of the host to which the IP belongs, and join the MAC to the switch. The MAC forwarding table eliminates the flooding of unicast packets of the destination MAC by each switch in the network.

The above description is only an overview of the technical solutions of the embodiments of the present invention, and the technical means of the embodiments of the present invention can be more clearly understood, and can be implemented according to the contents of the specification, and the above and other objects, features and features of the embodiments of the present invention are Advantages will be more apparent and obvious, and specific embodiments of the invention are set forth below.

DRAWINGS

1 is a flowchart of a method for processing a unicast data packet according to an embodiment of the present invention;

2 is a flowchart of a technical solution according to Embodiment 1 of the present invention;

3 is a flowchart of a technical solution according to Embodiment 2 of the present invention;

4 is a block diagram showing the structure of a processing apparatus for a unicast data packet according to an embodiment of the present invention.

detailed description

In order to solve the problem that the unicast packet flooding has a bad influence on the network in the prior art, the embodiment of the present invention provides a method and an apparatus for processing a unicast data packet, and the following describes the embodiment of the present invention with reference to the accompanying drawings and embodiments. Further details. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

This embodiment provides a method for processing a unicast data packet, which can be implemented on the terminal side, such as a personal computer (PC), a personal tablet computer, an IP set top box, an intelligent IP set top box, and the like. 1 is a flowchart of a method for processing a unicast data packet according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps (step S102 - step S106):

Step S102, monitoring whether the network card receives a unicast data packet that is not its own (a unicast data packet that is not the local network card);

Step S104, after monitoring the receipt of the unicast data packet, parsing the destination IP of the unicast data packet;

Step S106, sending a request message (for example, an ARP request message or a ping message, or other message that may cause the host to which the destination IP belongs to respond) to the host to which the destination IP belongs; wherein the request message is used to request the foregoing The corresponding destination host in the unicast packet performs MAC address feedback.

With the embodiment, the problem that the unicast packet flooding adversely affects the network in the related art is effectively solved, thereby effectively eliminating the unicast packet flooding of the destination MAC by each switch in the network.

In a specific implementation process, in order to facilitate the recording of the destination MAC, the embodiment provides a preferred implementation manner, that is, before monitoring whether the network card receives a unicast data packet that does not belong to itself, the method further includes: establishing a unicast pan to be cleaned up. a flood data set; wherein the unicast flood data to be cleaned records the destination MAC.

For the above-mentioned unicast flooding data set to be cleaned, there may be various forms, for example, it may be embodied in the form of a unicast flooding linked list to be cleaned, or may be an array, a stack, a collection, a hash table, or the like.

Optionally, sending the request message to the host to which the destination IP belongs includes the following preferred implementation manners:

After the first time the request packet is sent to the host to which the destination IP belongs, the first condition is met: the current time-request packet sending time ≥ the first preset time; wherein the request packet sending time is sent to the host the previous time. The time when the message is requested; if yes, the request message is resent to the host; if not, the real-time monitoring continues to monitor whether the first condition is met.

Before the real-time monitoring whether the first condition is met, the method further includes: determining the unicast flood data set to be cleaned, and recording the destination MAC of the host.

Optionally, sending the request message to the host to which the destination IP belongs further includes the following preferred implementation manners:

The real-time monitoring whether the second condition is met: the current time-unicast data packet receiving time ≥ the second preset time; wherein the unicast data packet receiving time is the time when the network card receives the unicast data packet the previous time; And clearing the destination MAC corresponding to the unicast data packet from the unicast flood data set to be cleaned; if not, continuing to monitor whether the second condition is met in real time.

In a specific implementation process, the first preset time and the second preset time may be set according to actual conditions.

The following describes the technical solutions of the embodiments of the present invention by using an arp packet as an example and a ping packet as an example.

Embodiment 1: Eliminate the corresponding unicast flood by sending an ARP request packet

The embodiment provides a method for eliminating unicast flooding in a local area network by using an IP terminal: after the IP terminal detects that the NIC receives a unicast data packet that does not belong to itself, parses the destination IP address of the unicast data packet, and the purpose is The host to which the IP belongs sends an ARP Request packet. In this way, after receiving the ARP request packet, the host to which the destination IP belongs will reply to the ARP request, so that the switches learn the MAC of the host to which the IP belongs, and add the MAC to the MAC forwarding table of the switch, thereby eliminating the network. Each switch in the road floods the unicast packet of the destination MAC.

In this embodiment, a “unicast flooding linked list to be cleaned up” is maintained, and each detected non-native flooding unicast packet information is organized into an entry and saved in a linked list (using the destination MAC as a table). The item is uniquely marked. The entry information includes the destination MAC address, the destination IP address, the last unicast data packet received by the destination MAC address, and the ARP request packet transmission time. The re-sending ARP interval T1 is used to control the interval for sending ARP request packets of each entry. The aging time of the unicast flooding entry is aging and the entry is deleted.

2 is a flowchart of a technical solution according to Embodiment 1 of the present invention. As shown in FIG. 2, the process includes:

Step 201: Create and initialize a "unicast flooding linked list to be cleaned up".

Step 202: Start a sub-thread of "to-be-cleaned unicast flooding list". The sub-thread is used to re-send the ARP request packet of the unicast flooding list to be cleared and delete the aging of the entry. This sub-thread is described later.

Step 203: Dynamically monitor whether the network card receives the unicast data packet that is not the local network card. If yes, go to step 204; if not, continue with step 203.

Step 204: Parse the received destination MAC address of the non-local network card unicast data packet.

Step 205: Determine whether the unicast flooding list to be cleaned has an entry corresponding to the destination MAC. If yes, go to step 205a; if not, go to step 206.

Step 205a: Update the "reception time of the last received MAC unicast data packet" of the destination MAC corresponding entry to the current time, and then proceed to step 203 to continue detecting the new situation.

Step 206: Record the destination MAC entry to the "unicast flooding linked list to be cleaned up".

Step 207: Parse the received destination IP address of the non-local network card unicast data packet, and update the destination IP address of the corresponding entry.

Step 208: Send an ARP request packet to the host to which the destination IP belongs.

Step 209: Update the ARP request sending time of the destination MAC corresponding entry to the current time. Then proceed to step 203 to continue detecting the new situation.

In this embodiment, the steps of the sub-thread of the "unicast flooding linked list to be cleaned up" initiated by the above step 202 are as follows:

Step 2101: Initialize the retransmission ARP interval T1, and initialize the entry aging time T2, generally T2>2T1.

Step 2102: Whether the unicast flooding linked list to be cleaned item is empty. If it is empty, proceed to step 2102; if not, go to step 2103.

Step 2103: Detect whether each entry needs to resend the ARP request packet: if the "current time" minus the entry "APR request sending time" is greater than or equal to T1, resend the ARP request packet of the entry, and Update the APR Request Send Time of this entry to the current time.

Step 2104: Check whether the aging time of each entry has arrived. If it has arrived, clear the corresponding entry. That is, if the "current time" minus the entry "the last time the receiving time of the MAC unicast packet received this destination" is greater than or equal to T2, the entry is cleared. Then proceed to step 2102.

Embodiment 2: Eliminating the corresponding unicast flooding by sending a ping request packet

The embodiment provides a method for eliminating unicast flooding in a local area network by using an IP terminal: after the IP terminal detects that the NIC receives a unicast data packet that does not belong to itself, parses the destination IP address of the unicast data packet, and the purpose is The host to which the IP belongs sends a ping request packet. In this way, after receiving the ping request packet, the host to which the destination IP belongs will reply to the ping request, so that the switches learn the MAC of the host to which the IP belongs, and add the MAC to the MAC forwarding table of the switch, thereby eliminating the network. Each switch in the road floods the unicast packet of the destination MAC.

In this embodiment, a “unicast flooding linked list to be cleaned up” is maintained, and each detected non-native flooding unicast packet information is organized into an entry and saved in a linked list (using the destination MAC as a table). The item is uniquely marked. The entry information includes the destination MAC address, the destination IP address, the last unicast data packet received by the destination MAC address, and the ping request packet transmission time. The ping request interval is set to aging the ping request packet of each entry. The aging time of the unicast flooding entry is aging and the entry is deleted.

FIG. 3 is a flowchart of a technical solution according to Embodiment 2 of the present invention. As shown in FIG. 3, the process includes:

Step 301: Create and initialize a "unicast flooding linked list to be cleaned up".

Step 302: Start the "unilateral flooding linked list to be cleaned up" sub-thread. The sub-thread is used to re-send the ping request packet and delete the aging of the unicast flooding list. This sub-thread is described later.

Step 303: Dynamically monitor whether the network card receives the unicast data packet that is not the local network card. If yes, go to step 304; if not, continue with step 303.

Step 304: Parse the received destination MAC address of the non-local network card unicast data packet.

Step 305: Determine whether the unicast flooding list to be cleaned has an entry corresponding to the destination MAC. If yes, go to step 305a; if not, go to step 306.

Step 305a: Update the "reception time of the last received MAC unicast data packet" of the destination MAC corresponding entry to the current time, and then proceed to step 303 to continue detecting the new situation.

Step 306: Record the destination MAC entry to the "unicast flooding linked list to be cleaned up".

Step 307: Parse the received destination IP address of the non-local network card unicast data packet, and update the destination IP address of the corresponding entry.

Step 308: Send a ping request packet to the host to which the destination IP belongs.

Step 309: Update the ping request sending time of the destination MAC corresponding entry to the current time. Then proceed to step 203 to continue detecting the new situation.

In this embodiment, the steps of the sub-thread of the "unicast flooding linked list to be cleaned up" initiated by the above step 302 are as follows:

Step 3101: Initialize the retransmission ARP interval T1, and initialize the entry aging time T2, generally T2>2T1.

Step 3102: Whether the item of the unicast flooding linked list to be cleaned is empty. If it is empty, proceed to step 3102; if not, go to step 3103.

Step 3103: Detect whether each entry needs to resend the ping request packet: if the current time minus the ping request sending time is greater than or equal to T1, the ping request packet of the entry is resent, and Update the "ping request send time" of this entry to the current time.

Step 3104: Detect whether the aging time of each entry has arrived. If yes, clear the corresponding entry. That is, if the "current time" minus the entry "the last time the receiving time of the MAC unicast packet received this destination" is greater than or equal to T2, the entry is cleared. Then proceed to step 3102.

The above description is only a preferred embodiment of the present invention. It is detected by different methods whether a non-native unicast data packet is received by the local device, and the host belongs to the host that receives the non-native unicast data packet destination. Sending other messages except the ARP request message and the ping message that may cause the "received host of the non-native unicast data packet destination host" to respond, or indirectly causing the "received non-native device" The unicast data packet destination IP belongs to the host, and the method for sending the ARP request packet and the ping packet can implement the technical solution of the present invention.

Corresponding to the processing method of the unicast data packet introduced in the foregoing embodiment, the embodiment provides a processing device for the unicast data packet, and the device may be disposed on the terminal side to implement the foregoing embodiment. FIG. 4 is a structural block diagram of a processing apparatus for a unicast data packet according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes: a data packet monitoring module 10, an IP parsing module 20, and a message sending module 30. The structure is described in detail below.

The data packet monitoring module 10 is configured to monitor whether the network card receives a unicast data packet that does not belong to itself;

The IP parsing module 20 is configured to parse the destination IP of the unicast data packet after monitoring the receiving the unicast data packet;

The message sending module 30 is configured to send a request message to the host to which the destination IP belongs. The request message is used to request MAC address feedback for the corresponding destination host in the unicast data packet.

In a specific implementation process, in order to facilitate the recording of the destination MAC, the embodiment provides a preferred implementation manner, that is, the apparatus further includes: a data set establishing module, configured to monitor whether the network card receives unicast data that is not its own. Before the packet, the unicast flood data set to be cleaned is set up; wherein the destination unicast flood data is to be recorded in the centralized MAC address.

Optionally, the message sending module 30 includes: a first condition determining unit, configured to monitor whether the first condition is met after the first time the request packet is sent to the host to which the destination IP belongs: the current time-request message sending time ≥ a first preset time; wherein the request message sending time is a time when the request message is sent to the host for the previous time; the first processing unit is configured to resend the host to the host if the judgment result is yes The request message is sent; if the judgment result is no, the real-time monitoring continues to monitor whether the first condition is satisfied.

The message sending module 30 further includes: a record determining unit, configured to determine, in the real-time monitoring, whether the first condition determining unit meets the first condition, determining the unicast flooding data set to be cleaned, and recording The destination MAC of the host.

The message sending module 30 further includes: a second condition determining unit configured to monitor whether the second condition is met in real time: the current time-unicast data packet receiving time ≥ the second preset time; wherein the unicast data packet The receiving time is the time when the NIC received the unicast data packet the previous time; the second processing unit is configured to: if the determination result is yes, the destination MAC corresponding to the unicast data packet, from the The unicast flood data to be cleaned is cleared; if the judgment result is no, the real-time monitoring continues to monitor whether the second condition is satisfied.

The embodiment of the present invention automatically detects whether the network card receives the unicast data packet whose destination MAC address is not the MAC address of the local network card, and if received, parses the destination IP address of the unicast data packet, and then sends an arp request to the host to which the destination IP belongs. Packet, or ping message, etc. In this way, the host to which the destination IP belongs will reply to the arp request message or reply. Ping packets, these replies will pass through the switches in the network, so that the switches learn the MAC of the host to which the IP belongs, and add the MAC to the MAC forwarding table of the switch, thereby eliminating the MACs of the switches in the network. The unicast package is flooded.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Industrial applicability

As described above, in the foregoing embodiment and the preferred embodiment, the host to which the destination IP belongs will reply to the arp request packet or the reply ping packet, and the reply packets will pass through the switch in the network, so that the switches learn the IP address. The MAC address of the host is added to the MAC forwarding table of the switch, thereby eliminating the flooding of the unicast packets of the destination MAC by each switch in the network.

Claims

A method for processing a unicast data packet, the method comprising:

Monitor whether the NIC receives a unicast packet that does not belong to itself;

After monitoring the received unicast data packet, parsing the destination network interconnection protocol IP of the unicast data packet;

The request message is sent to the host to which the destination IP belongs, and the request message is used to request MAC address feedback for the corresponding destination host in the unicast data packet.
The method of claim 1, wherein the method further comprises: before monitoring whether the network card receives a unicast data packet that does not belong to itself, the method further comprising:

Establishing a unicast flood data set to be cleaned; wherein the unicast flood data to be cleaned records the destination MAC.
The method of claim 2, wherein the sending the request message to the host to which the destination IP belongs includes:

After the first time the request packet is sent to the host to which the destination IP belongs, the first condition is met: the current time-request packet sending time ≥ the first preset time; wherein the request packet sending time is the previous time to the host The time when the request message was sent;

If yes, the request message is resent to the host; if not, the real-time monitoring continues to monitor whether the first condition is met.
The method of claim 3, wherein the method further comprises: before real time monitoring whether the first condition is met, the method further comprising:

Determining the unicast flood data set to be cleaned, and recording the destination MAC of the host.
The method of claim 2, wherein the sending the request message to the host to which the destination IP belongs further includes:

Real time monitoring whether the second condition is met: the current time - the unicast data packet receiving time ≥ the second preset time; wherein the unicast data packet receiving time is the time when the network card receives the unicast data packet ;

If yes, the destination MAC corresponding to the unicast data packet is cleared from the unicast flooding data set to be cleaned; if not, the real-time monitoring continues to monitor whether the second condition is met.
A processing device for a unicast data packet, the device comprising:

a packet monitoring module configured to monitor whether the network card receives a unicast data packet that is not its own;

The IP parsing module is configured to parse the destination network interconnection protocol IP of the unicast data packet after monitoring the receiving the unicast data packet;

The message sending module is configured to send a request message to the host to which the destination IP belongs, where the request message is used to request MAC address feedback for the corresponding destination host in the unicast data packet.
The device of claim 6 wherein said device further comprises:

a data set establishing module, configured to: before the monitoring network card receives the unicast data packet that is not its own, establish a unicast flooding data set to be cleaned; wherein the unicast flooding data to be cleaned records the destination MAC address .
The apparatus of claim 7, wherein the message sending module comprises:

The first condition judging unit is configured to monitor whether the first condition is met after the request packet is sent to the host to which the destination IP belongs for the first time: the current time-request packet sending time ≥ the first preset time; wherein the request message The sending time is the time when the request message was sent to the host the previous time;

The first processing unit is configured to: when the determination result is yes, resend the request message to the host; if the determination result is no, continue to monitor whether the first condition is met in real time.
The device of claim 8, wherein the message sending module further comprises:

The record determining unit is configured to determine, in the real-time monitoring, whether the first condition is that the first condition determining unit meets the first condition, the unicast flooding data set to be cleaned, and record the destination MAC of the host.
The device of claim 7, wherein the message sending module further comprises:

The second condition determining unit is configured to monitor whether the second condition is met in real time: the current time-unicast data packet receiving time ≥ the second preset time; wherein the unicast data packet receiving time is that the network card received the previous time The time of the unicast data packet;

The second processing unit is configured to: if the determination result is yes, clear the destination MAC corresponding to the unicast data packet from the unicast flooding data set to be cleaned; if the determination result is no, Continue to monitor in real time whether the second condition is met.