IP Calculator Subnet
Introduction
In this post we are going to see how to write a script to find the subnet calculator, we are using korn shell to write. the interpreter we are going to use /bin/ksh, the korn shell supports MacOS, Linux and Unix flavours. This will be helpful for assign the ip address to the server ip planning.
Script
The below script is the IP calculator subnet script
#!/bin/ksh typeset -i2 mask=255 [[ $# != 2 ]] && { echo "Usage: $0 ipaddress subnetmask" exit 1 } SaveIFS=$IFS IFS=. typeset -a IParrn=($1) typeset -a NMarr=($2) IFS=$SaveIFS typeset -i2 ip1=${IParrn[0]} typeset -i2 ip2=${IParrn[1]} typeset -i2 ip3=${IParrn[2]} typeset -i2 ip4=${IParrn[3]} typeset -i2 nm1=${NMarr[0]} typeset -i2 nm2=${NMarr[1]} typeset -i2 nm3=${NMarr[2]} typeset -i2 nm4=${NMarr[3]} echo echo " IP Address: $1" echo " Subnet Mask: $2" echo " Network Address: $((ip1 & nm1)).$((ip2 & nm2)).$((ip3 & nm3)).$((ip4 & nm4))" echo "Broadcast Address: $((ip1 | (mask ^ nm1))).$((ip2 | (mask ^ nm2))).$((ip3 | (mask ^ nm3))).$((ip4 | (mask ^ nm4)))" echo exit 0
Execute the script
Execute the script in any Unix platform, make sure ksh is installed and make sure execute permission is applied for the ipcalc.sh file
Example 1:
The below example shows the IP Address, subnet mask, network address and broadcast address of the IP provided.
server@control Desktop % ./ipcalc.sh 10.10.0.1 255.255.0.0 IP Address: 10.10.0.1 Subnet Mask: 255.255.0.0 Network Address: 10.10.0.0 Broadcast Address: 10.10.255.255 server@control Desktop %
Example 2:
The below example for the class 2 ip address subnet
server@control Desktop % ./ipcalc.sh 192.168.0.1 255.255.0.0 IP Address: 192.168.0.1 Subnet Mask: 255.255.0.0 Network Address: 192.168.0.0 Broadcast Address: 192.168.255.255 server@control Desktop %
See Aslo
Korn shell wiki – https://en.wikipedia.org/wiki/KornShell
Shell Script basics – https://computercarriage.com/2020/12/06/shell-script-basics/
Hope you got some idea on the ip calculator subnet and how to use it. let me know your comments on the same.
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