Building with Debug Symbols¶
First make sure srsRAN 4G has been downloaded, and you have created and navigated to the build folder:
git clone https://github.com/srsran/srsran_4g.git cd srsRAN_4G mkdir build cd build
To build srsRAN 4G with debug symbols, the following steps can be taken. If srsRAN 4G has already been built, the original build folder should be cleared before proceeding. This can be done with the following command:
rm -rf * make clean
The following command can then be used to build srsRAN 4G with debug symbols enabled:
cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ../ make make test
The log file containing the debug info can be found in the
Examining PCAPs with Wireshark¶
The srsRAN 4G applications support packet capture at the MAC and NAS layers of the network stack.
Packet capture files (pcaps) can be viewed using Wireshark (www.wireshark.org). pcaps are encoded in compact MAC-LTE and MAC-NR form. They can be found in the /tmp folder where other logs are located. To view in wireshark, edit the preferences of the DLT_USER dissector.
To decode MAC pcaps add an entry with the following:
Further, enable the heuristic dissection in UDP under: Analyze > Enabled Protocols > MAC-LTE > mac_lte_udp and MAC-NR > mac_nr_udp
Using the same filename for mac_filename and mac_nr_filename writes both MAC-LTE and MAC-NR to the same file allowing a better analysis.
To decode NAS pcaps add and entry with the following:
For more information, see https://wiki.wireshark.org/MAC-LTE.
The srsEPC application supports packet capture (pcap) of S1AP messages between the MME and eNodeBs. Enable packet captures in epc.conf or on the command line, by setting the pcap.enable value to true. To view in wireshark, edit the preferences of the DLT_USER dissector.
To decode S1AP pcaps add an entry with: