Myra::Traffic::FTP Namespace Reference

Detect and examine plain text FTP packets. More...

Functions
bool	examine (Flow &flow, const Myra::PktInfo &info)
	Examine a packet for FTP, and mark the flow if found. More...
bool	helper (Flow &flow, const Myra::PktInfo &info)
	Helper exam to detect when a data connection will be taking place. More...

Detailed Description

Detect and examine plain text FTP packets.

Function Documentation

bool Myra::Traffic::FTP::examine	(	Myra::Flow &	flow,
		const Myra::PktInfo &	info
	)

Examine a packet for FTP, and mark the flow if found.

Returns

true if this exam needs to be called again for the given flow

false if this exam never needs to be called again

Within the first few packets, look for:

^220[- ].*\r\n

A simple example:

 0: 32 32 30 20 46 69 6c 65 43 61 74 61 6c 79 73 74 20 53 65 72 76 65 72 20 45 6e 74 65 72 70 72 69 - 220 FileCatalyst Server Enterpri
20: 73 65 20 76 33 2e 34 20 42 75 69 6c 64 20 31 31 20 28 30 36 2f 30 35 2f 32 30 31 34 20 31 36 31 - se v3.4 Build 11 (06/05/2014 161
40: 38 29 0d 0a                                                                                     - 8)..

A more complex example with the "-" continuation character after the 220 response code:

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bool Myra::Traffic::FTP::helper	(	Myra::Flow &	flow,
		const Myra::PktInfo &	info
	)

Helper exam to detect when a data connection will be taking place.

This exam is automatically added to a flow once FTP::examine() has detected that a flow is Traffic::Type::FTP.

Returns

true if this exam needs to be called again for the given flow

false if this exam never needs to be called again

Look for traffic like this which contains both the IP address and port we expect to see for the data connections:

 0: 32 32 37 20 45 6e 74 65 72 69 6e 67 20 50 61 73 73 69 76 65 20 4d 6f 64 65 20 28 31 39 32 2c 31 - 227 Entering Passive Mode (192,1
20: 36 38 2c 31 2c 33 2c 33 34 2c 31 36 35 29 0d 0a                                                 - 68,1,3,34,165)..

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