mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-23 03:43:33 +02:00
079d0bd8a9
* Refactor log * Add new log methods * Fix logger test * Change all logging code * Clean up pathObj * Rebase to latest main * Remove invoking method name after the dot
324 lines
9 KiB
Go
324 lines
9 KiB
Go
/*
|
|
|
|
Some of codes are copied from https://github.com/octeep/wireproxy, license below.
|
|
|
|
Copyright (c) 2022 Wind T.F. Wong <octeep@pm.me>
|
|
|
|
Permission to use, copy, modify, and distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
*/
|
|
|
|
package wireguard
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net/netip"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/xtls/xray-core/common"
|
|
"github.com/xtls/xray-core/common/buf"
|
|
"github.com/xtls/xray-core/common/errors"
|
|
"github.com/xtls/xray-core/common/dice"
|
|
"github.com/xtls/xray-core/common/log"
|
|
"github.com/xtls/xray-core/common/net"
|
|
"github.com/xtls/xray-core/common/protocol"
|
|
"github.com/xtls/xray-core/common/session"
|
|
"github.com/xtls/xray-core/common/signal"
|
|
"github.com/xtls/xray-core/common/task"
|
|
"github.com/xtls/xray-core/core"
|
|
"github.com/xtls/xray-core/features/dns"
|
|
"github.com/xtls/xray-core/features/policy"
|
|
"github.com/xtls/xray-core/transport"
|
|
"github.com/xtls/xray-core/transport/internet"
|
|
)
|
|
|
|
// Handler is an outbound connection that silently swallow the entire payload.
|
|
type Handler struct {
|
|
conf *DeviceConfig
|
|
net Tunnel
|
|
bind *netBindClient
|
|
policyManager policy.Manager
|
|
dns dns.Client
|
|
// cached configuration
|
|
endpoints []netip.Addr
|
|
hasIPv4, hasIPv6 bool
|
|
wgLock sync.Mutex
|
|
}
|
|
|
|
// New creates a new wireguard handler.
|
|
func New(ctx context.Context, conf *DeviceConfig) (*Handler, error) {
|
|
v := core.MustFromContext(ctx)
|
|
|
|
endpoints, hasIPv4, hasIPv6, err := parseEndpoints(conf)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d := v.GetFeature(dns.ClientType()).(dns.Client)
|
|
return &Handler{
|
|
conf: conf,
|
|
policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
|
|
dns: d,
|
|
endpoints: endpoints,
|
|
hasIPv4: hasIPv4,
|
|
hasIPv6: hasIPv6,
|
|
}, nil
|
|
}
|
|
|
|
func (h *Handler) processWireGuard(ctx context.Context, dialer internet.Dialer) (err error) {
|
|
h.wgLock.Lock()
|
|
defer h.wgLock.Unlock()
|
|
|
|
if h.bind != nil && h.bind.dialer == dialer && h.net != nil {
|
|
return nil
|
|
}
|
|
|
|
log.Record(&log.GeneralMessage{
|
|
Severity: log.Severity_Info,
|
|
Content: "switching dialer",
|
|
})
|
|
|
|
if h.net != nil {
|
|
_ = h.net.Close()
|
|
h.net = nil
|
|
}
|
|
if h.bind != nil {
|
|
_ = h.bind.Close()
|
|
h.bind = nil
|
|
}
|
|
|
|
// bind := conn.NewStdNetBind() // TODO: conn.Bind wrapper for dialer
|
|
bind := &netBindClient{
|
|
netBind: netBind{
|
|
dns: h.dns,
|
|
dnsOption: dns.IPOption{
|
|
IPv4Enable: h.hasIPv4,
|
|
IPv6Enable: h.hasIPv6,
|
|
},
|
|
workers: int(h.conf.NumWorkers),
|
|
},
|
|
ctx: ctx,
|
|
dialer: dialer,
|
|
reserved: h.conf.Reserved,
|
|
}
|
|
defer func() {
|
|
if err != nil {
|
|
_ = bind.Close()
|
|
}
|
|
}()
|
|
|
|
h.net, err = h.makeVirtualTun(bind)
|
|
if err != nil {
|
|
return errors.New("failed to create virtual tun interface").Base(err)
|
|
}
|
|
h.bind = bind
|
|
return nil
|
|
}
|
|
|
|
// Process implements OutboundHandler.Dispatch().
|
|
func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer internet.Dialer) error {
|
|
outbounds := session.OutboundsFromContext(ctx)
|
|
ob := outbounds[len(outbounds)-1]
|
|
if !ob.Target.IsValid() {
|
|
return errors.New("target not specified")
|
|
}
|
|
ob.Name = "wireguard"
|
|
ob.CanSpliceCopy = 3
|
|
|
|
if err := h.processWireGuard(ctx, dialer); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Destination of the inner request.
|
|
destination := ob.Target
|
|
command := protocol.RequestCommandTCP
|
|
if destination.Network == net.Network_UDP {
|
|
command = protocol.RequestCommandUDP
|
|
}
|
|
|
|
// resolve dns
|
|
addr := destination.Address
|
|
if addr.Family().IsDomain() {
|
|
ips, err := h.dns.LookupIP(addr.Domain(), dns.IPOption{
|
|
IPv4Enable: h.hasIPv4 && h.conf.preferIP4(),
|
|
IPv6Enable: h.hasIPv6 && h.conf.preferIP6(),
|
|
})
|
|
{ // Resolve fallback
|
|
if (len(ips) == 0 || err != nil) && h.conf.hasFallback() {
|
|
ips, err = h.dns.LookupIP(addr.Domain(), dns.IPOption{
|
|
IPv4Enable: h.hasIPv4 && h.conf.fallbackIP4(),
|
|
IPv6Enable: h.hasIPv6 && h.conf.fallbackIP6(),
|
|
})
|
|
}
|
|
}
|
|
if err != nil {
|
|
return errors.New("failed to lookup DNS").Base(err)
|
|
} else if len(ips) == 0 {
|
|
return dns.ErrEmptyResponse
|
|
}
|
|
addr = net.IPAddress(ips[dice.Roll(len(ips))])
|
|
}
|
|
|
|
var newCtx context.Context
|
|
var newCancel context.CancelFunc
|
|
if session.TimeoutOnlyFromContext(ctx) {
|
|
newCtx, newCancel = context.WithCancel(context.Background())
|
|
}
|
|
|
|
p := h.policyManager.ForLevel(0)
|
|
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := signal.CancelAfterInactivity(ctx, func() {
|
|
cancel()
|
|
if newCancel != nil {
|
|
newCancel()
|
|
}
|
|
}, p.Timeouts.ConnectionIdle)
|
|
addrPort := netip.AddrPortFrom(toNetIpAddr(addr), destination.Port.Value())
|
|
|
|
var requestFunc func() error
|
|
var responseFunc func() error
|
|
|
|
if command == protocol.RequestCommandTCP {
|
|
conn, err := h.net.DialContextTCPAddrPort(ctx, addrPort)
|
|
if err != nil {
|
|
return errors.New("failed to create TCP connection").Base(err)
|
|
}
|
|
defer conn.Close()
|
|
|
|
requestFunc = func() error {
|
|
defer timer.SetTimeout(p.Timeouts.DownlinkOnly)
|
|
return buf.Copy(link.Reader, buf.NewWriter(conn), buf.UpdateActivity(timer))
|
|
}
|
|
responseFunc = func() error {
|
|
defer timer.SetTimeout(p.Timeouts.UplinkOnly)
|
|
return buf.Copy(buf.NewReader(conn), link.Writer, buf.UpdateActivity(timer))
|
|
}
|
|
} else if command == protocol.RequestCommandUDP {
|
|
conn, err := h.net.DialUDPAddrPort(netip.AddrPort{}, addrPort)
|
|
if err != nil {
|
|
return errors.New("failed to create UDP connection").Base(err)
|
|
}
|
|
defer conn.Close()
|
|
|
|
requestFunc = func() error {
|
|
defer timer.SetTimeout(p.Timeouts.DownlinkOnly)
|
|
return buf.Copy(link.Reader, buf.NewWriter(conn), buf.UpdateActivity(timer))
|
|
}
|
|
responseFunc = func() error {
|
|
defer timer.SetTimeout(p.Timeouts.UplinkOnly)
|
|
return buf.Copy(buf.NewReader(conn), link.Writer, buf.UpdateActivity(timer))
|
|
}
|
|
}
|
|
|
|
if newCtx != nil {
|
|
ctx = newCtx
|
|
}
|
|
|
|
responseDonePost := task.OnSuccess(responseFunc, task.Close(link.Writer))
|
|
if err := task.Run(ctx, requestFunc, responseDonePost); err != nil {
|
|
common.Interrupt(link.Reader)
|
|
common.Interrupt(link.Writer)
|
|
return errors.New("connection ends").Base(err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// creates a tun interface on netstack given a configuration
|
|
func (h *Handler) makeVirtualTun(bind *netBindClient) (Tunnel, error) {
|
|
t, err := h.conf.createTun()(h.endpoints, int(h.conf.Mtu), nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
bind.dnsOption.IPv4Enable = h.hasIPv4
|
|
bind.dnsOption.IPv6Enable = h.hasIPv6
|
|
|
|
if err = t.BuildDevice(h.createIPCRequest(bind, h.conf), bind); err != nil {
|
|
_ = t.Close()
|
|
return nil, err
|
|
}
|
|
return t, nil
|
|
}
|
|
|
|
// serialize the config into an IPC request
|
|
func (h *Handler) createIPCRequest(bind *netBindClient, conf *DeviceConfig) string {
|
|
var request strings.Builder
|
|
|
|
request.WriteString(fmt.Sprintf("private_key=%s\n", conf.SecretKey))
|
|
|
|
if !conf.IsClient {
|
|
// placeholder, we'll handle actual port listening on Xray
|
|
request.WriteString("listen_port=1337\n")
|
|
}
|
|
|
|
for _, peer := range conf.Peers {
|
|
if peer.PublicKey != "" {
|
|
request.WriteString(fmt.Sprintf("public_key=%s\n", peer.PublicKey))
|
|
}
|
|
|
|
if peer.PreSharedKey != "" {
|
|
request.WriteString(fmt.Sprintf("preshared_key=%s\n", peer.PreSharedKey))
|
|
}
|
|
|
|
address, port, err := net.SplitHostPort(peer.Endpoint)
|
|
if err != nil {
|
|
errors.LogError(h.bind.ctx, "failed to split endpoint ", peer.Endpoint, " into address and port")
|
|
}
|
|
addr := net.ParseAddress(address)
|
|
if addr.Family().IsDomain() {
|
|
dialerIp := bind.dialer.DestIpAddress()
|
|
if dialerIp != nil {
|
|
addr = net.ParseAddress(dialerIp.String())
|
|
errors.LogInfo(h.bind.ctx, "createIPCRequest use dialer dest ip: ", addr)
|
|
} else {
|
|
ips, err := h.dns.LookupIP(addr.Domain(), dns.IPOption{
|
|
IPv4Enable: h.hasIPv4 && h.conf.preferIP4(),
|
|
IPv6Enable: h.hasIPv6 && h.conf.preferIP6(),
|
|
})
|
|
{ // Resolve fallback
|
|
if (len(ips) == 0 || err != nil) && h.conf.hasFallback() {
|
|
ips, err = h.dns.LookupIP(addr.Domain(), dns.IPOption{
|
|
IPv4Enable: h.hasIPv4 && h.conf.fallbackIP4(),
|
|
IPv6Enable: h.hasIPv6 && h.conf.fallbackIP6(),
|
|
})
|
|
}
|
|
}
|
|
if err != nil {
|
|
errors.LogInfoInner(h.bind.ctx, err, "createIPCRequest failed to lookup DNS")
|
|
} else if len(ips) == 0 {
|
|
errors.LogInfo(h.bind.ctx, "createIPCRequest empty lookup DNS")
|
|
} else {
|
|
addr = net.IPAddress(ips[dice.Roll(len(ips))])
|
|
}
|
|
}
|
|
}
|
|
|
|
if peer.Endpoint != "" {
|
|
request.WriteString(fmt.Sprintf("endpoint=%s:%s\n", addr, port))
|
|
}
|
|
|
|
for _, ip := range peer.AllowedIps {
|
|
request.WriteString(fmt.Sprintf("allowed_ip=%s\n", ip))
|
|
}
|
|
|
|
if peer.KeepAlive != 0 {
|
|
request.WriteString(fmt.Sprintf("persistent_keepalive_interval=%d\n", peer.KeepAlive))
|
|
}
|
|
}
|
|
|
|
return request.String()[:request.Len()]
|
|
}
|