Created
August 8, 2024 14:42
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A script that takes two files--a set of IPs and a set of Subnet--and shows which IPs are in which subnets
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| #!/bin/bash | |
| if [ "$#" -lt 2 ]; then | |
| echo "Usage: $0 <IP_FILE> <CIDR_FILE>" | |
| exit 1 | |
| fi | |
| IP_FILE=$1 | |
| CIDR_FILE=$2 | |
| # Read IPs and subnets into arrays | |
| mapfile -t ips < "$IP_FILE" | |
| mapfile -t subnets < "$CIDR_FILE" | |
| # Function to check if an IP is in a subnet | |
| check_ip_in_subnet() { | |
| local ip=$1 | |
| local subnet=$2 | |
| local temp_subnet_file=$(mktemp) | |
| echo "$subnet" > "$temp_subnet_file" | |
| if echo "$ip" | iprange -1 "$temp_subnet_file" &>/dev/null; then | |
| rm "$temp_subnet_file" | |
| return 0 | |
| else | |
| rm "$temp_subnet_file" | |
| return 1 | |
| fi | |
| } | |
| # Check each IP against the subnets | |
| for ip in "${ips[@]}"; do | |
| found=0 | |
| for subnet in "${subnets[@]}"; do | |
| if check_ip_in_subnet "$ip" "$subnet"; then | |
| echo "IP address $ip is in subnet $subnet" | |
| found=1 | |
| break | |
| fi | |
| done | |
| if [ "$found" -eq 0 ]; then | |
| echo "IP address $ip is not in any of the subnets" | |
| fi | |
| done |
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