On 04/03/2017 03:40 PM, Mauricio Vasquez via iovisor-dev wrote:
Dear All,
I am trying to inject a BPF_PROG_TYPE_SCHED_ACT program and attach it to the TC
using C++.
Out of curiosity, why not .._SCHED_CLS program in direct-action mode
(same functionality wrt BPF and would save you additional layers of
indirection in tc at least), or are you required to run something
different as a classifier entity?
I had no particular problems compiling and injecting the program, however I
haven't been able to attach it to TC, I know that in go I can use the netlink
library [1] or in python pyroute2 [2], unfortunately it appears not to be a
similar library in C++
Is there a library that implements this functionality for C or C++? in case of
negative, does some body have a example code of how to achieve this using the
netlink protocol?
Not aware of a C++ lib (but I also haven't looked much). You could
check the iproute2 code, f.e. tc/f_bpf.c to set up the nl message.
Thanks in Advance,
Mauricio
[1] https://github.com/vishvananda/netlink
[2] http://docs.pyroute2.org/
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