Skip to content

Add subnet verbose mode #8

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
noqqe wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Add subnet verbose mode #8

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
28 changes: 20 additions & 8 deletions cmd/subnet.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,11 +10,11 @@ import (
)

var subnetCmd = &cobra.Command{
Aliases: []string{"sub"},
Use: "subnet <prefix> <n>",
Short: "Split the specified prefix into \"n\" sub-networks",
Aliases: []string{"sub"},
Use: "subnet <prefix> <n>",
Short: "Split the specified prefix into \"n\" sub-networks",
SilenceErrors: true,
Args: cobra.ExactArgs(2),
Args: cobra.ExactArgs(2),
RunE: func(cmd *cobra.Command, args []string) error {
var sub []string

Expand All @@ -29,15 +29,27 @@ var subnetCmd = &cobra.Command{
}

log := math.Log2(float64(n))
if n < 2 || log - float64(int(log)) != 0 {
if n < 2 || log-float64(int(log)) != 0 {
return fmt.Errorf("\"n\" must be a power of 2")
}

for _, sp := range p.Subnets(int(log)) {
sub = append(sub, sp.String())
if verbose {
for _, sp := range p.Subnets(int(log)) {
fmt.Printf("Prefixes: %s\n", sp.String())
_, p := ParseCIDR(sp.String())
fmt.Printf(" Addresses: %d\n", p.NumNodes())
fmt.Printf(" Netmask: %s\n", Explode(p.Mask))
fmt.Printf(" First: %s\n", Explode(p.IP))
fmt.Printf(" Last: %s\n", Explode(p.Last()))
fmt.Printf("\n")
}
} else {
for _, sp := range p.Subnets(int(log)) {
sub = append(sub, sp.String())
}
fmt.Printf("Prefixes: %s\n", strings.Join(sub, ", "))
}

fmt.Printf("Prefixes: %s\n", strings.Join(sub, ", "))
return nil
},
}
Expand Down