[Winpcap-users] pcap_compile leak?
guy at alum.mit.edu
Tue Sep 25 23:38:31 GMT 2007
On Sep 25, 2007, at 3:52 PM, Paul Heil wrote:
> I have a pcap application that uses a filter (as below). The 15th
> time I call pcap_compile(), it fails with the error "too many
> registers needed to evaluate expression".
Wow. I thought I fixed that one in *2001*:
date: 2001-12-18 01:10:49 -0800; author: guy; state: Exp; lines:
Free up both "registers" (scratch memory locations, really) used by an
arithmetic expression in a filter; otherwise, we leak registers when
compiling arithmetic expressions.
> I'm using PCAP v4.0.1 and developer pack 4.0.1.
WinPcap 4.0.1 should be based on a version of libpcap with that fix
(which first showed up in libpcap 0.8); perhaps there's another place
where the code generator leaks registers.
> Is there a call other than pcap_freecode() I should be using to free
> the memory allocated in the pcap_compile() command?
No. This leak isn't a memory leak, so pcap_freecode() won't help.
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