From a346876cfb8e308d2e3aed526b01f0bb173ea67e Mon Sep 17 00:00:00 2001
From: GnomeZworc <nicolas.boufidjeline@g3e.fr>
Date: Mon, 30 Mar 2026 23:19:34 +0200
Subject: [PATCH] f-15: code add code for binary

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>
---
 cmd/dhcp/main.go | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 cmd/dhcp/main.go

diff --git a/cmd/dhcp/main.go b/cmd/dhcp/main.go
new file mode 100644
index 0000000..b2ce08d
--- /dev/null
+++ b/cmd/dhcp/main.go
@@ -0,0 +1,64 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"net"
+	"os"
+
+	"git.g3e.fr/syonad/two/internal/dhcp"
+	"git.g3e.fr/syonad/two/pkg/systemd"
+)
+
+func main() {
+	subnet := flag.String("subnet", "", "Subnet CIDR (e.g. 10.10.10.0/24)")
+	name := flag.String("name", "", "Config name (e.g. vpc1_br-00002)")
+	gateway := flag.String("gateway", "", "Gateway IP (e.g. 10.10.10.1)")
+	confDir := flag.String("confdir", "/etc/dnsmasq.d", "dnsmasq config directory")
+	flag.Parse()
+
+	if *subnet == "" || *name == "" || *gateway == "" {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	_, network, err := net.ParseCIDR(*subnet)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "invalid subnet: %v\n", err)
+		os.Exit(1)
+	}
+
+	gw := net.ParseIP(*gateway)
+	if gw == nil {
+		fmt.Fprintf(os.Stderr, "invalid gateway IP: %q\n", *gateway)
+		os.Exit(1)
+	}
+
+	conf := dhcp.Config{
+		Network: network,
+		Gateway: gw,
+		Name:    *name,
+		ConfDir: *confDir,
+	}
+
+	confPath, err := dhcp.GenerateConfig(conf)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error generating config: %v\n", err)
+		os.Exit(1)
+	}
+	fmt.Printf("dnsmasq config written to %s\n", confPath)
+
+	svc, err := systemd.New()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error connecting to systemd: %v\n", err)
+		os.Exit(1)
+	}
+	defer svc.Close()
+
+	unit := "dnsmasq@" + *name + ".service"
+	if err := svc.Start(unit); err != nil {
+		fmt.Fprintf(os.Stderr, "error starting %s: %v\n", unit, err)
+		os.Exit(1)
+	}
+	fmt.Printf("started %s\n", unit)
+}