[asterisk-dev] [Code Review] 4139: stun: fix size of attribute string to match rfc

[Scott Griepentrog]

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Review request for Asterisk Developers.


Repository: Asterisk


Description
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When sending a USERNAME attribute in an RTP STUN response, the implementation in append_attr_string() passes the actual length of the string instead of padding it up to a multiple of 4 bytes size as required by the RFC 3489.

This patch adds separate variables for calculating the string and padded attribute lengths, and handles the proper padding.


Diffs
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  /branches/1.8/main/stun.c 426921 

Diff: https://reviewboard.asterisk.org/r/4139/diff/


Testing
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Since I don't have an easy way to generate RTP STUN messages, I've tested the change on a separate test bed, and submitted the patch to the reporter for confirmation. 


Thanks,

Scott Griepentrog

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