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Pull request: dhcpd imp code

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Merge in DNS/adguard-home from dhcpd-imp-code to master

Squashed commit of the following:

commit 413403c169bd3f6b5f2ed63b783d078dbb15e054
Merge: eed183850 0fec990bc
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri May 26 12:46:25 2023 +0300

    Merge remote-tracking branch 'origin/master' into dhcpd-imp-code

commit eed1838502add1e16e5d3ada03778f21913fd5e5
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri May 26 12:16:46 2023 +0300

    dhcpd: imp docs

commit fa4fe036f7b1f2b49201bf0b5b904f99989082f0
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Thu May 25 11:32:34 2023 +0300

    all: lint script

commit a4022b3d4bbfa709e5096397bbe64ea406c8a366
Merge: e08ff3a26 cbc7985e7
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Thu May 25 11:29:57 2023 +0300

    Merge remote-tracking branch 'origin/master' into dhcpd-imp-code

    # Conflicts:
    #	scripts/make/go-lint.sh

commit e08ff3a26414e201d6e75608363db941fa2f5b39
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed May 24 15:43:11 2023 +0300

    dhcpd: imp code

commit 970b538f8ea94d3732d77bfb648e402a1d28ab06
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed May 24 15:40:36 2023 +0300

    dhcpd: imp code

commit 0e5916ddd7514af983e8557080d55d6aeb6fbbc0
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed May 24 15:37:17 2023 +0300

    dhcpd: imp code

commit e06a6c6031b232e76ae2be3e3b8fe1a2ffa715e0
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 16:40:09 2023 +0300

    dhcpd: imp code

commit eed4ff10ff1b29c71d70fb7978706efde89afee1
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 15:45:06 2023 +0300

    all: lint script

commit 87f84ace5f6f34dbc28befa8257d1d2492c5e0a4
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 15:44:23 2023 +0300

    dhcpd: imp code

commit a54c9929d51de1f1e6807d650fd08dd80ddbf147
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 14:29:42 2023 +0300

    dhcpd: imp code

commit 1bbea342f7f55587724aa9a29d9657e5ce75f5d8
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 14:12:09 2023 +0300

    dhcpd: imp code

commit 48fb4eff73683e799ddb3076afdcf7b067ca24b6
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 13:57:59 2023 +0300

    dhcpd: imp code

commit f6cd7fcb8d4c1c815a20875d777ea1eca2c8ea89
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 13:17:54 2023 +0300

    dhcpd: imp code

commit 2b91dc25bbaa16dba6d9389a4e2224cf91eb4554
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue May 23 12:57:46 2023 +0300

    dhcpd: imp code

commit 34f5dd58764080f6202fc9a1abd751a15dbf7090
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon May 22 15:31:39 2023 +0300

    dhcpd: imp code

commit 12ef0d225064a1b78adf7b2cfca21a8dba92ca8e
Merge: 6b62a7665 24b41100c
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon May 22 13:03:41 2023 +0300

    Merge remote-tracking branch 'origin/master' into dhcpd-imp-code

commit 6b62a7665720b85398d65a1926518a63e6bb6403
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon May 22 12:55:43 2023 +0300

    dhcpd: imp code

commit 18c5cdf0480fac7711282027a64d58704c75af5f
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon May 22 12:48:30 2023 +0300

    dhcpd: imp code

commit e7c1f4324cba3fe86cf56df6b971791a5a8790de
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon May 22 12:37:15 2023 +0300

    dhcpd: imp code

... and 1 more commit
This commit is contained in:
Dimitry Kolyshev
2023-05-26 12:50:03 +03:00
parent 0fec990bcf
commit ea8d634f65
8 changed files with 401 additions and 296 deletions
Download Patch File Download Diff File Expand all files Collapse all files

169
internal/dhcpd/http_unix.go
View File

@@ -16,6 +16,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/netutil"
)
type v4ServerConfJSON struct {
@@ -263,6 +264,28 @@ func (s *server) handleDHCPSetConfigV6(
return srv6, enabled, err
}
// createServers returns DHCPv4 and DHCPv6 servers created from the provided
// configuration conf.
func (s *server) createServers(conf *dhcpServerConfigJSON) (srv4, srv6 DHCPServer, err error) {
srv4, v4Enabled, err := s.handleDHCPSetConfigV4(conf)
if err != nil {
return nil, nil, fmt.Errorf("bad dhcpv4 configuration: %s", err)
}
srv6, v6Enabled, err := s.handleDHCPSetConfigV6(conf)
if err != nil {
return nil, nil, fmt.Errorf("bad dhcpv6 configuration: %s", err)
}
if conf.Enabled == aghalg.NBTrue && !v4Enabled && !v6Enabled {
return nil, nil, fmt.Errorf("dhcpv4 or dhcpv6 configuration must be complete")
}
return srv4, srv6, nil
}
// handleDHCPSetConfig is the handler for the POST /control/dhcp/set_config
// HTTP API.
func (s *server) handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
conf := &dhcpServerConfigJSON{}
conf.Enabled = aghalg.BoolToNullBool(s.conf.Enabled)
@@ -275,22 +298,9 @@ func (s *server) handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
return
}
srv4, v4Enabled, err := s.handleDHCPSetConfigV4(conf)
srv4, srv6, err := s.createServers(conf)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "bad dhcpv4 configuration: %s", err)
return
}
srv6, v6Enabled, err := s.handleDHCPSetConfigV6(conf)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "bad dhcpv6 configuration: %s", err)
return
}
if conf.Enabled == aghalg.NBTrue && !v4Enabled && !v6Enabled {
aghhttp.Error(r, w, http.StatusBadRequest, "dhcpv4 or dhcpv6 configuration must be complete")
aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
return
}
@@ -350,10 +360,10 @@ type netInterfaceJSON struct {
Addrs6 []netip.Addr `json:"ipv6_addresses"`
}
// handleDHCPInterfaces is the handler for the GET /control/dhcp/interfaces HTTP
// API.
// handleDHCPInterfaces is the handler for the GET /control/dhcp/interfaces
// HTTP API.
func (s *server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
resp := map[string]netInterfaceJSON{}
resp := map[string]*netInterfaceJSON{}
ifaces, err := net.Interfaces()
if err != nil {
@@ -364,68 +374,23 @@ func (s *server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
for _, iface := range ifaces {
if iface.Flags&net.FlagLoopback != 0 {
// it's a loopback, skip it
continue
}
if iface.Flags&net.FlagBroadcast == 0 {
// this interface doesn't support broadcast, skip it
// It's a loopback, skip it.
continue
}
var addrs []net.Addr
addrs, err = iface.Addrs()
if err != nil {
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"Failed to get addresses for interface %s: %s",
iface.Name,
err,
)
if iface.Flags&net.FlagBroadcast == 0 {
// This interface doesn't support broadcast, skip it.
continue
}
jsonIface, iErr := newNetInterfaceJSON(iface)
if iErr != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "%s", iErr)
return
}
jsonIface := netInterfaceJSON{
Name: iface.Name,
HardwareAddr: iface.HardwareAddr.String(),
}
if iface.Flags != 0 {
jsonIface.Flags = iface.Flags.String()
}
// we don't want link-local addresses in json, so skip them
for _, addr := range addrs {
ipnet, ok := addr.(*net.IPNet)
if !ok {
// not an IPNet, should not happen
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"got iface.Addrs() element %[1]s that is not net.IPNet, it is %[1]T",
addr)
return
}
// ignore link-local
//
// TODO(e.burkov): Try to listen DHCP on LLA as well.
if ipnet.IP.IsLinkLocalUnicast() {
continue
}
if ip4 := ipnet.IP.To4(); ip4 != nil {
addr := netip.AddrFrom4(*(*[4]byte)(ip4))
jsonIface.Addrs4 = append(jsonIface.Addrs4, addr)
} else {
addr := netip.AddrFrom16(*(*[16]byte)(ipnet.IP))
jsonIface.Addrs6 = append(jsonIface.Addrs6, addr)
}
}
if len(jsonIface.Addrs4)+len(jsonIface.Addrs6) != 0 {
jsonIface.GatewayIP = aghnet.GatewayIP(iface.Name)
if jsonIface != nil {
resp[iface.Name] = jsonIface
}
}
@@ -433,6 +398,64 @@ func (s *server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
_ = aghhttp.WriteJSONResponse(w, r, resp)
}
// newNetInterfaceJSON creates a JSON object from a [net.Interface] iface.
func newNetInterfaceJSON(iface net.Interface) (out *netInterfaceJSON, err error) {
addrs, err := iface.Addrs()
if err != nil {
return nil, fmt.Errorf(
"failed to get addresses for interface %s: %s",
iface.Name,
err,
)
}
out = &netInterfaceJSON{
Name: iface.Name,
HardwareAddr: iface.HardwareAddr.String(),
}
if iface.Flags != 0 {
out.Flags = iface.Flags.String()
}
// We don't want link-local addresses in JSON, so skip them.
for _, addr := range addrs {
ipNet, ok := addr.(*net.IPNet)
if !ok {
// Not an IPNet, should not happen.
return nil, fmt.Errorf("got iface.Addrs() element %[1]s that is not"+
" net.IPNet, it is %[1]T", addr)
}
// Ignore link-local.
//
// TODO(e.burkov): Try to listen DHCP on LLA as well.
if ipNet.IP.IsLinkLocalUnicast() {
continue
}
vAddr, iErr := netutil.IPToAddrNoMapped(ipNet.IP)
if iErr != nil {
// Not an IPNet, should not happen.
return nil, fmt.Errorf("failed to convert IP address %[1]s: %w", addr, iErr)
}
if vAddr.Is4() {
out.Addrs4 = append(out.Addrs4, vAddr)
} else {
out.Addrs6 = append(out.Addrs6, vAddr)
}
}
if len(out.Addrs4)+len(out.Addrs6) == 0 {
return nil, nil
}
out.GatewayIP = aghnet.GatewayIP(iface.Name)
return out, nil
}
// dhcpSearchOtherResult contains information about other DHCP server for
// specific network interface.
type dhcpSearchOtherResult struct {