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cmd/kg/main.go: validate port range

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Signed-off-by: leonnicolas <leonloechner@gmx.de>
This commit is contained in:
leonnicolas 2021-09-30 10:03:20 +02:00
parent b1b934c24b
commit c7e2be9357
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GPG Key ID: 088D0743E2B65C07
1 changed files with 6 additions and 3 deletions
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9
cmd/kg/main.go
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@ -109,7 +109,7 @@ var (
master string
mtu uint
topologyLabel string
port uint
port int
subnet string
resyncPeriod time.Duration
iptablesForwardRule bool
@ -139,7 +139,7 @@ func init() {
cmd.Flags().StringVar(&master, "master", "", "The address of the Kubernetes API server (overrides any value in kubeconfig).")
cmd.Flags().UintVar(&mtu, "mtu", wireguard.DefaultMTU, "The MTU of the WireGuard interface created by Kilo.")
cmd.Flags().StringVar(&topologyLabel, "topology-label", k8s.RegionLabelKey, "Kubernetes node label used to group nodes into logical locations.")
cmd.Flags().UintVar(&port, "port", mesh.DefaultKiloPort, "The port over which WireGuard peers should communicate.")
cmd.Flags().IntVar(&port, "port", mesh.DefaultKiloPort, "The port over which WireGuard peers should communicate.")
cmd.Flags().StringVar(&subnet, "subnet", mesh.DefaultKiloSubnet.String(), "CIDR from which to allocate addresses for WireGuard interfaces.")
cmd.Flags().DurationVar(&resyncPeriod, "resync-period", 30*time.Second, "How often should the Kilo controllers reconcile?")
cmd.Flags().BoolVar(&iptablesForwardRule, "iptables-forward-rules", false, "Add default accept rules to the FORWARD chain in iptables. Warning: this may break firewalls with a deny all policy and is potentially insecure!")
@ -239,7 +239,10 @@ func runRoot(_ *cobra.Command, _ []string) error {
return fmt.Errorf("backend %v unknown; possible values are: %s", backend, availableBackends)
}
m, err := mesh.New(b, enc, gr, hostname, int(port), s, local, cni, cniPath, iface, cleanUpIface, createIface, mtu, resyncPeriod, prioritisePrivateAddr, iptablesForwardRule, log.With(logger, "component", "kilo"))
if port < 1 || port > 1<<16-1 {
return fmt.Errorf("invalid port: port mus be in range [%d:%d], but got %d", 1, 1<<16-1, port)
}
m, err := mesh.New(b, enc, gr, hostname, port, s, local, cni, cniPath, iface, cleanUpIface, createIface, mtu, resyncPeriod, prioritisePrivateAddr, iptablesForwardRule, log.With(logger, "component", "kilo"))
if err != nil {
return fmt.Errorf("failed to create Kilo mesh: %v", err)
}