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RTSP Netfilter code for v2.6 respectively 3.x kernels
C Makefile
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maru-sama Merge pull request #9 from sforshee/master
Fix build with Linux 5.3
Latest commit acb3f80 Oct 31, 2019

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.gitattributes Add .gitattributes file Jan 26, 2014
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Makefile
README.rst More typo fixes in README.rst Dec 29, 2009
netfilter_helpers.h
netfilter_mime.h New code layout Oct 29, 2008
nf_conntrack_rtsp.c Merge pull request #9 from sforshee/master Oct 31, 2019
nf_conntrack_rtsp.h
nf_nat_rtsp.c

README.rst

Disclaimer:

This software is provided as is. I take no responsibility if it destroys your data or opens up a security hole on your firewall. That said, I have yet to hear something about this happening.

I did not create this code myself, most was written by Tom Marshall, later on Harald Welte and then Steven van Acker ported it to the new 2.6 netfilter API. I just picked up this code in 2007 and made it compile and hopefully work with the new changed netfilter API.

Bugs:

Of course there are. One of the most important ones, is that you MUST NOT filter outgoing connections otherwise the reply packes go missing. I tried to figure out, why the _expect call is not taking care of the outgoing connections but I was not able to figure this out. I gladly welcome patches that fix this and other bugs.

Build Instructions:

Have the kernel source ready in some place and NF_CONNTRACK_NAT enabled in the configuration otherwise you will get an error during make. The Kbuild setup looks in /lib/modules/`uname -r`/build for the source.

If the source is located in another place set the KERNELDIR environment variable accordingly.

After that a:

  • make
  • make modules_install (as root)

should be enough. Then do a "modprobe nf_nat_rtsp" as root and try to connect to a RTSP service.

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