added another script that deterministically generates a local ip:port based on a given string

README.md

@@ -6,6 +6,11 @@
 
     With the verbose option this will also print processing information and the estimated remaining time.
 
+- [`hash2addr`](./bin/hash2addr)
+
+    Outputs a randomly generated IP address and port number based on the MD5 hash of the input string.
+
+
 ## Install
 
 ```zsh

bin/hash2addr

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Display help message
+if [[ "$1" == "-h" || "$1" == "--help" ]]; then
+    echo "Usage: $(basename $0) <input_string>"
+    echo "Outputs a randomly generated IP address and port number based on the MD5 hash of the input string."
+    exit 0
+fi
+
+# Check that input string is provided
+if [ -z "$1" ]; then
+    echo "Error: input string not provided."
+    echo "Usage: $(basename $0) <input_string>"
+    exit 1
+fi
+
+input_str="$1"
+
+# Hash the input string using MD5 and extract the first 4 bytes
+hash_bytes="$(echo -n $input_str | md5sum | cut -d' ' -f1 | head -c 8)"
+
+# Create an IP address in the 127.0.0.0/8 range using the first 3 bytes of the hash
+ip="127.$(printf '%d.%d.%d' 0x${hash_bytes:0:2} 0x${hash_bytes:2:2} 0x${hash_bytes:4:2})"
+
+# Use the last 2 bytes of the hash to generate a port number in the range 1024-65535
+port="$((0x${hash_bytes:6:2} % (65535 - 1024) + 1024))"
+
+echo "$ip:$port"