diff options
Diffstat (limited to 'dhcpv4/nclient4/example_lease_test.go')
| -rw-r--r-- | dhcpv4/nclient4/example_lease_test.go | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/dhcpv4/nclient4/example_lease_test.go b/dhcpv4/nclient4/example_lease_test.go index 876a075..a324162 100644 --- a/dhcpv4/nclient4/example_lease_test.go +++ b/dhcpv4/nclient4/example_lease_test.go @@ -1,18 +1,41 @@ -//this is an example for nclient4 with lease +//this is an example for nclient4 with lease/release -package nclient4_test +package nclient4 import ( "context" + "fmt" "log" "github.com/insomniacslk/dhcp/dhcpv4" "github.com/insomniacslk/dhcp/dhcpv4/nclient4" + "github.com/vishvananda/netlink" ) -func Example_dHCPv4ClientLease() { - ifname := "eth0" - remoteID := "client-1" +//applyLease adding the assigned ip to the interface specified by ifname +func applyLease(lease *nclient4.Lease, ifname string) error { + link, err := netlink.LinkByName(ifname) + if err != nil { + return err + } + prefixlen := 32 + if ipmask := lease.ACK.SubnetMask(); ipmask != nil { + prefixlen, _ = ipmask.Size() + + } + prefixstr := fmt.Sprintf("%v/%v", lease.ACK.YourIPAddr, prefixlen) + naddr, err := netlink.ParseAddr(prefixstr) + if err != nil { + return err + } + err = netlink.AddrReplace(link, naddr) + return err + +} + +func main() { + ifname := "eth1.200" + remoteid := "client-1" var idoptlist dhcpv4.OptionCodeList //specify option82 is part of client identification used by DHCPv4 server idoptlist.Add(dhcpv4.OptionRelayAgentInformation) @@ -22,17 +45,19 @@ func Example_dHCPv4ClientLease() { log.Fatalf("failed to create dhcpv4 client,%v", err) } //adding option82/remote-id option to discovery and request - remoteIDSubOpt := dhcpv4.OptGeneric(dhcpv4.AgentRemoteIDSubOption, []byte(remoteID)) - option82 := dhcpv4.OptRelayAgentInfo(remoteIDSubOpt) - _, _, err = clnt.RequestSavingLease(context.Background(), dhcpv4.WithOption(option82)) + remoteidsubopt := dhcpv4.OptGeneric(dhcpv4.AgentRemoteIDSubOption, []byte(remoteid)) + option82 := dhcpv4.OptRelayAgentInfo(remoteidsubopt) + _, lease, err := clnt.Request(context.Background(), dhcpv4.WithOption(option82)) if err != nil { log.Fatal(err) } //print the lease - log.Printf("Got lease:\n%v", clnt.GetLease()) + log.Printf("Got lease:\n%+v", lease) + //apply the lease + applyLease(lease, ifname) //release the lease log.Print("Releasing lease...") - err = clnt.Release() + err = clnt.Release(lease) if err != nil { log.Fatal(err) } |