In our installation, we use big INVITE messages (webRTC) and to avoid packet fragmentation we use TCP transport for HEP3 messages.
I found sngrep can parse HEP3 messages via UDP transport but not via TCP.
Please check the attached PCAP file.
hep-tcp.pcap.gz
Wireshark with lua plugin properly parses this.
https://github.com/sipcapture/hep-wireshark
