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