get_connection_details.sh

# Some containers do not provide netstat or lsof. This command will get you the local IP a session is established on
# In short: This gets the output from namespace 1 (where usually the process is running inside the container), filters out the field where the hex IP is located and converts it into a readable IP in the right format. (some fields are inverted etc)
# Benefit is that you dont need netstat installed to see connections. 


printf '%d.%d.%d.%d\n' $(grep -v local /proc/1/net/tcp | awk '{print $2}'|cut -d: -f1| sed -r 's/(..)/0x\1 /g') |  awk -F. '{for (i=NF; i>0; --i) printf "%s%s", (i<NF ? "." : ""), $i; printf "\n"}'

# This lists the connections that are established. 
printf '%d.%d.%d.%d\n' $(grep -v rem /proc/1/net/tcp | awk '{print $3}'|cut -d: -f1| sed -r 's/(..)/0x\1 /g') |  awk -F. '{for (i=NF; i>0; --i) printf "%s%s", (i<NF ? "." : ""), $i; printf "\n"}'

# It could be shorter..