tree b9288badaf39184d9f015073e1fc8b792ce68de8
parent f259bd8359de61e9c8aa92c775b95665c1a143d5
author Holger Hans Peter Freyther <holger@moiji-mobile.com> 1400763790 +0200
committer Holger Hans Peter Freyther <holger@moiji-mobile.com> 1400769971 +0200

mgcp: Add proper length checking for line handling

In ae1997248ccb4fba1394267d3051082dfd85448a the handwritten tokenizer
was replaced with strtok_r. As part of this change the structural
checking of MGCP parameters was stopped. This means that a code like
"line + 3" might access beyond the first NUL and be possibly behind
the msgb. Manually add size checking again. Manually jumping to the
error label is not possible anymore as it has been removed. The result
is that invalid lines will be skipped. This is matching the general
approach by the IETF RFCs to be permissive in data being received.