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Pull request 2152: 4923 gopacket DHCP vol.7

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Updates #4923.

Squashed commit of the following:

commit 0f90eb3596fcbca0d87cb4eb857d45aea26f3854
Merge: 38b3165b6 bd99e3e09
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Mon Feb 19 20:11:38 2024 +0300

    Merge branch 'master' into 4923-gopacket-dhcp-vol.7

commit 38b3165b696c9a3f69484d8e4c2c847340ed9363
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Mon Feb 19 14:52:01 2024 +0300

    dhcpsvc: imp docs

commit 0a078920a20de9fb2d864c90d2311800c6f3bc3f
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Mon Feb 19 14:48:19 2024 +0300

    dhcpsvc: imp code

commit 30691f0d989c48b2f0dff8079952615dbfbdaea1
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Feb 15 19:57:41 2024 +0300

    dhcpsvc: imp code, dry

commit 20f5ef80fb2d1cad869883da3684a01e5b8b3315
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Feb 15 15:57:09 2024 +0300

    dhcpsvc: finish leases methods
This commit is contained in:
Eugene Burkov
2024-02-20 14:52:38 +03:00
parent bd99e3e09d
commit 6fd0a624ca
6 changed files with 639 additions and 83 deletions
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20
internal/dhcpsvc/dhcpsvc.go
View File

@@ -14,7 +14,9 @@ import (
// Interface is a DHCP service.
//
// TODO(e.burkov): Separate HostByIP, MACByIP, IPByHost into a separate
// interface. This is also valid for Enabled method.
// interface. This is also applicable to Enabled method.
//
// TODO(e.burkov): Reconsider the requirements for the leases validity.
type Interface interface {
agh.ServiceWithConfig[*Config]
@@ -29,6 +31,8 @@ type Interface interface {
// MACByIP returns the MAC address for the given IP address leased. It
// returns nil if there is no such client, due to an assumption that a DHCP
// client must always have a MAC address.
//
// TODO(e.burkov): Think of a contract for the returned value.
MACByIP(ip netip.Addr) (mac net.HardwareAddr)
// IPByHost returns the IP address of the DHCP client with the given
@@ -44,17 +48,17 @@ type Interface interface {
// signatures instead of cloning the whole list.
Leases() (ls []*Lease)
// AddLease adds a new DHCP lease. It returns an error if the lease is
// invalid or already exists.
// AddLease adds a new DHCP lease. l must be valid. It returns an error if
// l already exists.
AddLease(l *Lease) (err error)
// UpdateStaticLease changes an existing DHCP lease. It returns an error if
// there is no lease with such hardware addressor if new values are invalid
// or already exist.
// UpdateStaticLease replaces an existing static DHCP lease. l must be
// valid. It returns an error if the lease with the given hardware address
// doesn't exist or if other values match another existing lease.
UpdateStaticLease(l *Lease) (err error)
// RemoveLease removes an existing DHCP lease. It returns an error if there
// is no lease equal to l.
// RemoveLease removes an existing DHCP lease. l must be valid. It returns
// an error if there is no lease equal to l.
RemoveLease(l *Lease) (err error)
// Reset removes all the DHCP leases.