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UDP message-based IP path active measurement method

An active measurement and message technology, applied in the direction of digital transmission systems, data exchange networks, electrical components, etc., can solve the problems that detection messages are easily identified as measurement path behavior or attack behavior, and damage the integrity of path measurement. Achieve the effect of ensuring path identity, enhancing detection capability, and expanding measurement space

Inactive Publication Date: 2010-11-17
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, when UDP packets are used for detection, the detection packets of the same measurement source point use the high port as the destination port. As a result, the behavior of the detected measurement path or multi-point measurement is considered to be a denial of service attack and is filtered. , that is, the probe packets of this method are easily identified as the behavior or attack behavior of measuring the path, thus destroying the integrity of the path measurement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The method for actively measuring the IP path based on the UDP message is characterized in that it comprises the following steps:

[0024] Step 1, for a given detection target address D, select the destination port and source port in the UDP message header;

[0025] Step 2, fill in the UDP message header and the IP message header field according to the provisions of the protocol, including recording the detection message number and the corresponding process number or thread number in the checksum field of the UDP header and the identification field of the IP header, and in the UDP header The data field of the message records the inspection of the UDP message, and then sends the detection message;

[0026] Step 3: If a response message is received within a given time, the response message is processed according to the type of the response message; or if the response message is not received within a given time, the waiting time is exceeded.

Embodiment 2

[0028] In the method for actively measuring an IP path based on a UDP message described in Embodiment 1, for a given detection target address D, the destination port in the header of the UDP message is selected for the target address D, and the specified well-known port range 1 Select a UDP service port in 1023 as the destination port of the detection message; at a measurement source point, for the same destination address D, once the destination port is selected, all the detections sent by the measurement source point for the same destination address D The destination port of the packet remains unchanged.

Embodiment 3

[0030] A method for actively measuring an IP path based on a UDP packet described in Embodiment 1, for a given detection target address D, selecting the source port in the UDP packet header is for the target address D, and from the specified port Select a port number from the number range 1 to 65535, including the well-known port whose UDP service has not been started on the host of the measurement source point, as the source port of the detection message; at a measurement source point, for the same target address D, once the source port is selected If it is set, the source ports of all the detection packets sent by the measurement source point for the same destination address D remain unchanged.

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Abstract

The invention discloses a UDP message-based IP path active measurement method. In the prior art, a detection message is so likely to be identified as a path measurement behavior or attack behavior and filtered that the integrity of path measurement is destructed. The method comprises: selecting a target port and a source port in a UDP message header according to a given detection target address D; filling the fields of the UDP message header and an IP message header according to the provisions of a protocol and sending the detection message: recording the number of the detection message and a corresponding process number or thread number in the detection sum field of the UDP header and the identifier field of the IP header, recording the detection of a UDP message in the data field of the UDP message and sending the detection message; and receiving a response message in a given time period and processing the response message according to the type of the response message, or waiting overtiming processing if the response message is not received in the given time period. The measurement method is used for resisting filtration in an IP network.

Description

Technical field: [0001] The invention relates to an active measurement method of an IP path based on a UDP message. Background technique: [0002] To detect the network topology path by active measurement mainly adopts a method similar to traceroute. First, send a detection message with TTL=1 from the measurement source point S to a certain measurement target D, and receive the returned ICMP timeout message, or wait for the given time t 0 (for example, 5 seconds), then send a message with TTL=2, and so on, until a message indicating that the target is reached is received from the detection target, or the TTL increases to a predetermined threshold (for example, 30). At this point, the path detection process for the measurement target D ends. According to the source IP addresses contained in the returned packets in sequence, the topological path from the measurement source point S to the measurement target D is obtained. Traditionally, when UDP packets are used for detectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/56H04L29/06
Inventor 姜誉方滨兴任健
Owner HEILONGJIANG UNIV
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