It used to convert a string in the format XXXXXXXX:XXXX, where X is a hexadecimal digit, into the dotted-quad notation (e.g. A.B.C.D) and decimal port number format.

convert_address.sh

#!/bin/bash

address_string="$1"

# Split the string into IP address and port number parts
ip_hex="$(echo "$address_string" | cut -d : -f 1)"
port_hex="$(echo "$address_string" | cut -d : -f 2)"

# Convert the hexadecimal IP address to decimal
ip_dec=$(printf %d 0x$ip_hex)

# Convert the decimal IP address to dotted-quad notation
ip_quad=$(echo $((($ip_dec>>24)&255)).$((($ip_dec>>16)&255)).$((($ip_dec>>8)&255)).$((($ip_dec)&255)))

# Convert the hexadecimal port number to decimal
port_dec=$(printf %d 0x$port_hex)

# Print the result
echo "$ip_quad:$port_dec"

$ head -n 2 /proc/1/net/tcp
  sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode                                                     
   0: 00000000:2378 00000000:0000 0A 00000000:00000000 00:00000000 00000000  1001        0 23741 1 00000000842a97c4 100 0 0 10 0

$ bash convert_address.sh 00000000:2378
0.0.0.0:9080