important command ref

my_cmds.sh

#!/bin/bash

#socat examples:
#recv msgs on udp port 60K and print to stdout. recv input on stdin and sendto connected socket.
socat - UDP4-LISTEN:60000
socat - UDP4-SENDTO:192.168.106.2:60000

# send contents of t.c to multiple TCP4 servers
socat GOPEN:t.c - | tee >(socat - tcp4:127.0.0.1:12345) >(socat - tcp4:127.0.0.1:33455) > /dev/null

DST=localhost
socat SYSTEM:"./send.sh" - | tee >(socat - udp4:$DST:12345) >(socat - udp4:$DST:33455) >/dev/null

#drop packets from source ip (.57) to dst ip (.59)
iptables -I OUTPUT -4 -s 10.67.129.57 -d 10.67.129.59 -j DROP


# Packet send using netmap-pkt-gen
./build-apps/pkt-gen/pkt-gen -f tx -i eth13 -d 192.168.99.178:5001 -s 192.168.99.180:60001 -D 84:ad:58:f3:c2:3f -S 84:ad:58:f3:c4:c1 -R 62700 -l 1024

#Get the target address in RPL-DAO message, tshark cmd format is:
tshark -r sim.pcapng -Y "icmpv6.type == 155 && icmpv6.code == 2" -T fields -e icmpv6.rpl.opt.target.prefix 2>/dev/null