Proof-of-Concept that you can send traffic in scapy while reading from it in *shark. In this example, we send pings, delayed by a second until the user hits ^C. The script below uses Scapy, a Python packet crafter.
Transcript
# === Sending Scapy Packets to Tshark ===
# Let's ping 8.8.8.8 a couple times, 1 second apart
# And send the packets to tshark
# We will be using this 15-line Scapy script (will be in transcript)
vi send_pings.py
# You can also just rewind and pause
# Create a file for destination of packets
livepcap=/tmp/scapy.pcap
touch $livepcap
# Send packet generation to background so we can read from it
python send_pings.py & tail -f -n +1 $livepcap | tshark -r -
send_pings.py
# This script will send pings to 8.8.8.8 spaces 1 sec apart
# And write the traffic to a pcap file
import time
import os
from scapy.all import PcapWriter, sr, IP, ICMP
livepcap = "/tmp/scapy.pcap"
with PcapWriter(livepcap, append=True, sync=True) as pkt_pipe:
pkt = IP(dst="8.8.8.8") / ICMP()
while True:
ans, unans = sr( pkt, verbose = False, retry = 0 )
packets = ans or unans
pkt_pipe.write(packets)
time.sleep(1)
