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Forum Topic - Set TOS for outgoing packages: (2 Items)

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Michael Radzieda(deleted)

08/07/2019 11:00 PM

post119801

Hey,

I want to change the TOS values of all outgoing TCP packages. I tried to do that with the package filter pf. In the pf 
versions of other operating systems like openBSD is a possibility to set the TOS. This option is not in the pf version 
of QNX. I am using QNX Neutrino 7.0.0. 

Are there another possibilities to change the TOS value for all outgoing TCP packages? 

I know its possible to create a RAW socket to create the IP header manually, but then its necessary to implement the 
whole handshake procedure themselves. This is an effort we want to prevent for our project.

Ted Zhang

08/08/2019 9:01 AM

post119802

Re: Set TOS for outgoing packages

Hi,

You need to get the latest io-pkt, libsocket.so, lsm-pf-v4.so (or lsm-pf-v6.so), pfctl. With the latest version, you can
 set tos using the following PF scrub rule:
scrub out on <interface> all set-tos <your_tos>

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