Add pcap over net support for ue

[matan1008]

Tested over zmq.
Thanks a lot!

[andrepuschmann]

Thanks @matan1008 for the contribution. Unfortunately we didn't have the bandwidth to review and integrate this before the 21.10 release. However, I encourage you to rebase the branch again on current master so we can consider it again. I
apologize for this.

[andrepuschmann]

Thanks for that. Could you check the SCTP thing please.

[andrepuschmann]

why is this needed for the UE?

[matan1008]

I don't really know why it is required (maybe to send the capture over the network?) but without linking with SCTP the build fails with:

[ 78%] Linking CXX executable srsue
/usr/bin/ld: ../../lib/src/common/libsrsran_common.a(network_utils.cc.o): in function `srsran::task_details::heap_table_t<srsran::sctp_recvmsg_pdu_task, bool, int>::call(void*, int) const':
network_utils.cc:(.text._ZNK6srsran12task_details12heap_table_tINS_21sctp_recvmsg_pdu_taskEbJiEE4callEPvi[_ZNK6srsran12task_details12heap_table_tINS_21sctp_recvmsg_pdu_taskEbJiEE4callEPvi]+0xe6): undefined reference to `sctp_recvmsg'
collect2: error: ld returned 1 exit status
make[2]: *** [srsue/src/CMakeFiles/srsue.dir/build.make:181: srsue/src/srsue] Error 1
make[1]: *** [CMakeFiles/Makefile2:10845: srsue/src/CMakeFiles/srsue.dir/all] Error 2
make: *** [Makefile:163: all] Error 2

[andrepuschmann]

Mhh, maybe the network utils need to be stripped to have a version without SCTP that can be used in srsUE. I have to say that we are reluctant to do this change now. I'd leave the PR open in case it's useful for others like it is.

[andrepuschmann]

this shouldn't be needed for the UE

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