106 lines
3.3 KiB
Go
106 lines
3.3 KiB
Go
package dhcpd
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import (
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"net"
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"time"
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)
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// DHCPServer - DHCP server interface
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type DHCPServer interface {
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// ResetLeases - reset leases
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ResetLeases(leases []*Lease)
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// GetLeases - get leases
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GetLeases(flags int) []Lease
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// AddStaticLease - add a static lease
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AddStaticLease(lease Lease) error
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// RemoveStaticLease - remove a static lease
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RemoveStaticLease(l Lease) error
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// FindMACbyIP - find a MAC address by IP address in the currently active DHCP leases
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FindMACbyIP(ip net.IP) net.HardwareAddr
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// WriteDiskConfig4 - copy disk configuration
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WriteDiskConfig4(c *V4ServerConf)
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// WriteDiskConfig6 - copy disk configuration
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WriteDiskConfig6(c *V6ServerConf)
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// Start - start server
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Start() error
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// Stop - stop server
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Stop()
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getLeasesRef() []*Lease
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}
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// V4ServerConf - server configuration
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type V4ServerConf struct {
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Enabled bool `yaml:"-" json:"-"`
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InterfaceName string `yaml:"-" json:"-"`
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GatewayIP net.IP `yaml:"gateway_ip" json:"gateway_ip"`
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SubnetMask net.IP `yaml:"subnet_mask" json:"subnet_mask"`
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// The first & the last IP address for dynamic leases
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// Bytes [0..2] of the last allowed IP address must match the first IP
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RangeStart net.IP `yaml:"range_start" json:"range_start"`
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RangeEnd net.IP `yaml:"range_end" json:"range_end"`
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LeaseDuration uint32 `yaml:"lease_duration" json:"lease_duration"` // in seconds
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// IP conflict detector: time (ms) to wait for ICMP reply
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// 0: disable
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ICMPTimeout uint32 `yaml:"icmp_timeout_msec" json:"-"`
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// Custom Options.
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//
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// Option with arbitrary hexadecimal data:
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// DEC_CODE hex HEX_DATA
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// where DEC_CODE is a decimal DHCPv4 option code in range [1..255]
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//
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// Option with IP data (only 1 IP is supported):
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// DEC_CODE ip IP_ADDR
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Options []string `yaml:"options" json:"-"`
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ipRange *ipRange
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leaseTime time.Duration // the time during which a dynamic lease is considered valid
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dnsIPAddrs []net.IP // IPv4 addresses to return to DHCP clients as DNS server addresses
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routerIP net.IP // value for Option Router
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subnetMask net.IPMask // value for Option SubnetMask
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options []dhcpOption
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// notify is a way to signal to other components that leases have
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// change. notify must be called outside of locked sections, since the
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// clients might want to get the new data.
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//
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// TODO(a.garipov): This is utter madness and must be refactored. It
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// just begs for deadlock bugs and other nastiness.
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notify func(uint32)
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}
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// V6ServerConf - server configuration
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type V6ServerConf struct {
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Enabled bool `yaml:"-" json:"-"`
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InterfaceName string `yaml:"-" json:"-"`
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// The first IP address for dynamic leases
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// The last allowed IP address ends with 0xff byte
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RangeStart net.IP `yaml:"range_start" json:"range_start"`
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LeaseDuration uint32 `yaml:"lease_duration" json:"lease_duration"` // in seconds
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RASLAACOnly bool `yaml:"ra_slaac_only" json:"-"` // send ICMPv6.RA packets without MO flags
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RAAllowSLAAC bool `yaml:"ra_allow_slaac" json:"-"` // send ICMPv6.RA packets with MO flags
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ipStart net.IP // starting IP address for dynamic leases
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leaseTime time.Duration // the time during which a dynamic lease is considered valid
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dnsIPAddrs []net.IP // IPv6 addresses to return to DHCP clients as DNS server addresses
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// Server calls this function when leases data changes
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notify func(uint32)
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}
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type dhcpOption struct {
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code uint8
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data []byte
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}
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