next-ip

Small Go binary that returns the next IP address(es) from a CIDR input.

Usage

go run ./cmd/next-ip --help

go run ./cmd/next-ip 192.168.100.12/24
# 192.168.100.13

go run ./cmd/next-ip --count 3 192.168.100.13/24
# 192.168.100.14
# 192.168.100.15
# 192.168.100.16

go run ./cmd/next-ip --step 2 192.168.100.100/24
# 192.168.100.102

go run ./cmd/next-ip --count 3 --step 3 192.168.100.102/24
# 192.168.100.105
# 192.168.100.108
# 192.168.100.111

Flags:

• --count, -c: number of next IP addresses to output
• --step, -s: increment step between emitted addresses

Docker image

docker build -t next-ip .
docker run --rm next-ip 192.168.100.12/24

The final image is based on scratch and runs a static binary.

CI (Dagger)

The CI workflow (/.github/workflows/ci.yml) runs Dagger pipelines for:

• lint (go fmt check + go vet)
• tests (go test ./...)
• multi-arch builds (linux/amd64 and linux/arm64)

Releases

Tagged releases (v*) are published with GoReleaser via /.github/workflows/release.yml.