tcpflow
capture tcp payload using tcpflow
tcpflow -C -i lo dst port 9091
this will outbound the tcp payload of tls offloaded which destination port is 9091
convert tcpflow payload into hex using hexdump or xxd
### hexdump
tcpflow -C -i lo dst port 9091 | hexdump -C
# xxd
tcpflow -C -i lo dst port 9091 | xxd