ipcalc

Go implementation of ipcalc command.

build

go build or go install

download

• binary

build/install

brew

• add tap brew tap pete911/tap
• install brew install pete911/tap/ipcalc

go

go has to be installed.

• build go build (or with Taskfile.yml - task)

release

Releases are published when the new tag is created e.g. git tag -m "add super cool feature" v1.0.0 && git push --follow-tags

run

ipcalc takes either:

• one argument: <CIDR> (ipcalc)
• two arguments: <CIDR> <hostnum> (terraform cidrhost)
• three arguments: <CIDR> <newbits> <netnum> (terraform cidrsubnet)

ipcalc example

ipcalc 192.168.0.2/30

Address:    192.168.0.2           11000000.10101000.00000000.00000010
Netmask:    255.255.255.252 = 30  11111111.11111111.11111111.11111100
Wildcard:   0.0.0.3               00000000.00000000.00000000.00000011
=>
Network:    192.168.0.0/30        11000000.10101000.00000000.00000000
Broadcast:  192.168.0.3           11000000.10101000.00000000.00000011
HostMin:    192.168.0.1           11000000.10101000.00000000.00000001
HostMax:    192.168.0.2           11000000.10101000.00000000.00000010
Hosts/Net:  2
TotalHosts: 4

terraform cidrhost example

ipcalc 10.12.127.0/20 268

Address:    10.12.128.12          00001010.00001100.10000000.00001100
Netmask:    255.255.255.255 = 32  11111111.11111111.11111111.11111111
Wildcard:   0.0.0.0               00000000.00000000.00000000.00000000
=>
Network:    10.12.128.12/32       00001010.00001100.10000000.00001100
Broadcast:  N/A                   N/A
HostMin:    N/A                   N/A
HostMax:    N/A                   N/A
Hosts/Net:  0
TotalHosts: 1

terraform cidrsubnet example

ipcalc 10.1.2.0/24 4 15

Address:    10.1.2.240            00001010.00000001.00000010.11110000
Netmask:    255.255.255.240 = 28  11111111.11111111.11111111.11110000
Wildcard:   0.0.0.15              00000000.00000000.00000000.00001111
=>
Network:    10.1.2.240/28         00001010.00000001.00000010.11110000
Broadcast:  10.1.2.255            00001010.00000001.00000010.11111111
HostMin:    10.1.2.241            00001010.00000001.00000010.11110001
HostMax:    10.1.2.254            00001010.00000001.00000010.11111110
Hosts/Net:  14
TotalHosts: 16