Java Packet Sniffer

I hope this helps . Everything apart from the hostname is encrypted - so in your example the domain name and subdomain are in clear text, everything else is encrypted.
See Does SSL also encrypt cookies? for more details.

will be helpful for those in need Network interfaces (i.e. hardware network adapter cards) receive all traffic on the wire irrespective of whether it is addressed to them or not.
After receiving a frame, the driver checks the recipient's MAC address in the frame header and compares it to the MAC of the interface. If the addresses match then the frame is forwarded to the OS for consumption; if not, it is discarded.

seems to work fine If you have access to the same network that Falco runs on you can use some kind of packet sniffing software. Wireshark is a very popular packet sniffer which i would recommend. Wireshark can record all packet traffic and sort it by the protocol used. It allows you to save, print and add the records to a database like you are wanting to do. However the main thing you need to do on your end is gain access to the same network falco and the card readers use. So yes you could use an ethernet splitter and run a separate cable to your computer. That way wireshark can gain access to the traffic. You can download wireshark at http://www.wireshark.org

Does that help I'm using scapy with python to sniff live traffic. , The parameters to the sniff function should be like the below code.:

from scapy.all import *

def pkt_callback(pkt):
    pkt.show() # debug statement

sniff(iface="<My Interface>", prn=pkt_callback, filter="tcp", store=0)

sniff(iface="<My Interface>", prn = lambda x: x.show(), filter="tcp", store=0)