+ dhcpv6 server; rewrite dhcpv4 server; changed API

dhcpd/server.go

@@ -0,0 +1,81 @@
+package dhcpd
+
+import (
+	"net"
+	"time"
+)
+
+// DHCPServer - DHCP server interface
+type DHCPServer interface {
+	// ResetLeases - reset leases
+	ResetLeases(leases []*Lease)
+	// GetLeases - get leases
+	GetLeases(flags int) []Lease
+	// GetLeasesRef - get reference to leases array
+	GetLeasesRef() []*Lease
+	// AddStaticLease - add a static lease
+	AddStaticLease(lease Lease) error
+	// RemoveStaticLease - remove a static lease
+	RemoveStaticLease(l Lease) error
+	// FindMACbyIP - find a MAC address by IP address in the currently active DHCP leases
+	FindMACbyIP(ip net.IP) net.HardwareAddr
+
+	// WriteDiskConfig4 - copy disk configuration
+	WriteDiskConfig4(c *V4ServerConf)
+	// WriteDiskConfig6 - copy disk configuration
+	WriteDiskConfig6(c *V6ServerConf)
+
+	// Start - start server
+	Start() error
+	// Stop - stop server
+	Stop()
+}
+
+// V4ServerConf - server configuration
+type V4ServerConf struct {
+	Enabled       bool   `yaml:"-"`
+	InterfaceName string `yaml:"-"`
+
+	GatewayIP  string `yaml:"gateway_ip"`
+	SubnetMask string `yaml:"subnet_mask"`
+
+	// The first & the last IP address for dynamic leases
+	// Bytes [0..2] of the last allowed IP address must match the first IP
+	RangeStart string `yaml:"range_start"`
+	RangeEnd   string `yaml:"range_end"`
+
+	LeaseDuration uint32 `yaml:"lease_duration"` // in seconds
+
+	// IP conflict detector: time (ms) to wait for ICMP reply
+	// 0: disable
+	ICMPTimeout uint32 `yaml:"icmp_timeout_msec"`
+
+	ipStart    net.IP        // starting IP address for dynamic leases
+	ipEnd      net.IP        // ending IP address for dynamic leases
+	leaseTime  time.Duration // the time during which a dynamic lease is considered valid
+	dnsIPAddrs []net.IP      // IPv4 addresses to return to DHCP clients as DNS server addresses
+	routerIP   net.IP        // value for Option Router
+	subnetMask net.IPMask    // value for Option SubnetMask
+
+	// Server calls this function when leases data changes
+	notify func(uint32)
+}
+
+// V6ServerConf - server configuration
+type V6ServerConf struct {
+	Enabled       bool   `yaml:"-"`
+	InterfaceName string `yaml:"-"`
+
+	// The first IP address for dynamic leases
+	// The last allowed IP address ends with 0xff byte
+	RangeStart string `yaml:"range_start"`
+
+	LeaseDuration uint32 `yaml:"lease_duration"` // in seconds
+
+	ipStart    net.IP        // starting IP address for dynamic leases
+	leaseTime  time.Duration // the time during which a dynamic lease is considered valid
+	dnsIPAddrs []net.IP      // IPv6 addresses to return to DHCP clients as DNS server addresses
+
+	// Server calls this function when leases data changes
+	notify func(uint32)
+}