mirror of
https://github.com/Sagit-chu/flvx.git
synced 2026-10-07 18:26:37 +08:00
init
This commit is contained in:
qaq
@@ -0,0 +1,247 @@
|
||||
package ss
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"context"
|
||||
"crypto/tls"
|
||||
"io"
|
||||
"net"
|
||||
"time"
|
||||
|
||||
"github.com/go-gost/core/handler"
|
||||
md "github.com/go-gost/core/metadata"
|
||||
"github.com/go-gost/core/observer/stats"
|
||||
"github.com/go-gost/core/recorder"
|
||||
"github.com/go-gost/gosocks5"
|
||||
ctxvalue "github.com/go-gost/x/ctx"
|
||||
xnet "github.com/go-gost/x/internal/net"
|
||||
"github.com/go-gost/x/internal/util/sniffing"
|
||||
"github.com/go-gost/x/internal/util/ss"
|
||||
tls_util "github.com/go-gost/x/internal/util/tls"
|
||||
rate_limiter "github.com/go-gost/x/limiter/rate"
|
||||
xstats "github.com/go-gost/x/observer/stats"
|
||||
stats_wrapper "github.com/go-gost/x/observer/stats/wrapper"
|
||||
xrecorder "github.com/go-gost/x/recorder"
|
||||
"github.com/go-gost/x/registry"
|
||||
"github.com/shadowsocks/go-shadowsocks2/core"
|
||||
)
|
||||
|
||||
func init() {
|
||||
registry.HandlerRegistry().Register("ss", NewHandler)
|
||||
}
|
||||
|
||||
type ssHandler struct {
|
||||
cipher core.Cipher
|
||||
md metadata
|
||||
options handler.Options
|
||||
recorder recorder.RecorderObject
|
||||
certPool tls_util.CertPool
|
||||
}
|
||||
|
||||
func NewHandler(opts ...handler.Option) handler.Handler {
|
||||
options := handler.Options{}
|
||||
for _, opt := range opts {
|
||||
opt(&options)
|
||||
}
|
||||
|
||||
return &ssHandler{
|
||||
options: options,
|
||||
}
|
||||
}
|
||||
|
||||
func (h *ssHandler) Init(md md.Metadata) (err error) {
|
||||
if err = h.parseMetadata(md); err != nil {
|
||||
return
|
||||
}
|
||||
if h.options.Auth != nil {
|
||||
method := h.options.Auth.Username()
|
||||
password, _ := h.options.Auth.Password()
|
||||
h.cipher, err = ss.ShadowCipher(method, password, h.md.key)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
for _, ro := range h.options.Recorders {
|
||||
if ro.Record == xrecorder.RecorderServiceHandler {
|
||||
h.recorder = ro
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
if h.md.certificate != nil && h.md.privateKey != nil {
|
||||
h.certPool = tls_util.NewMemoryCertPool()
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func (h *ssHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) (err error) {
|
||||
defer conn.Close()
|
||||
|
||||
start := time.Now()
|
||||
|
||||
ro := &xrecorder.HandlerRecorderObject{
|
||||
Service: h.options.Service,
|
||||
Network: "tcp",
|
||||
RemoteAddr: conn.RemoteAddr().String(),
|
||||
LocalAddr: conn.LocalAddr().String(),
|
||||
Time: start,
|
||||
SID: string(ctxvalue.SidFromContext(ctx)),
|
||||
}
|
||||
|
||||
ro.ClientIP = conn.RemoteAddr().String()
|
||||
if clientAddr := ctxvalue.ClientAddrFromContext(ctx); clientAddr != "" {
|
||||
ro.ClientIP = string(clientAddr)
|
||||
}
|
||||
if h, _, _ := net.SplitHostPort(ro.ClientIP); h != "" {
|
||||
ro.ClientIP = h
|
||||
}
|
||||
|
||||
log := h.options.Logger.WithFields(map[string]any{
|
||||
"remote": conn.RemoteAddr().String(),
|
||||
"local": conn.LocalAddr().String(),
|
||||
"sid": ctxvalue.SidFromContext(ctx),
|
||||
"client": ro.ClientIP,
|
||||
})
|
||||
log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
|
||||
|
||||
pStats := xstats.Stats{}
|
||||
conn = stats_wrapper.WrapConn(conn, &pStats)
|
||||
|
||||
defer func() {
|
||||
if err != nil {
|
||||
ro.Err = err.Error()
|
||||
}
|
||||
ro.InputBytes = pStats.Get(stats.KindInputBytes)
|
||||
ro.OutputBytes = pStats.Get(stats.KindOutputBytes)
|
||||
ro.Duration = time.Since(start)
|
||||
if err := ro.Record(ctx, h.recorder.Recorder); err != nil {
|
||||
log.Errorf("record: %v", err)
|
||||
}
|
||||
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(start),
|
||||
"inputBytes": ro.InputBytes,
|
||||
"outputBytes": ro.OutputBytes,
|
||||
}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
|
||||
}()
|
||||
|
||||
if !h.checkRateLimit(conn.RemoteAddr()) {
|
||||
return rate_limiter.ErrRateLimit
|
||||
}
|
||||
|
||||
if h.cipher != nil {
|
||||
conn = ss.ShadowConn(h.cipher.StreamConn(conn), nil)
|
||||
}
|
||||
|
||||
conn.SetReadDeadline(time.Now().Add(h.md.readTimeout))
|
||||
|
||||
addr := &gosocks5.Addr{}
|
||||
if _, err := addr.ReadFrom(conn); err != nil {
|
||||
log.Error(err)
|
||||
io.Copy(io.Discard, conn)
|
||||
return err
|
||||
}
|
||||
ro.Host = addr.String()
|
||||
|
||||
conn.SetReadDeadline(time.Time{})
|
||||
|
||||
log = log.WithFields(map[string]any{
|
||||
"dst": addr.String(),
|
||||
"host": addr.String(),
|
||||
})
|
||||
|
||||
log.Debugf("%s >> %s", conn.RemoteAddr(), addr)
|
||||
|
||||
if h.options.Bypass != nil && h.options.Bypass.Contains(ctx, "tcp", addr.String()) {
|
||||
log.Debug("bypass: ", addr.String())
|
||||
return nil
|
||||
}
|
||||
|
||||
switch h.md.hash {
|
||||
case "host":
|
||||
ctx = ctxvalue.ContextWithHash(ctx, &ctxvalue.Hash{Source: addr.String()})
|
||||
}
|
||||
|
||||
var buf bytes.Buffer
|
||||
cc, err := h.options.Router.Dial(ctxvalue.ContextWithBuffer(ctx, &buf), "tcp", addr.String())
|
||||
ro.Route = buf.String()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer cc.Close()
|
||||
|
||||
if h.md.sniffing {
|
||||
if h.md.sniffingTimeout > 0 {
|
||||
conn.SetReadDeadline(time.Now().Add(h.md.sniffingTimeout))
|
||||
}
|
||||
|
||||
br := bufio.NewReader(conn)
|
||||
proto, _ := sniffing.Sniff(ctx, br)
|
||||
ro.Proto = proto
|
||||
|
||||
if h.md.sniffingTimeout > 0 {
|
||||
conn.SetReadDeadline(time.Time{})
|
||||
}
|
||||
|
||||
dial := func(ctx context.Context, network, address string) (net.Conn, error) {
|
||||
return cc, nil
|
||||
}
|
||||
dialTLS := func(ctx context.Context, network, address string, cfg *tls.Config) (net.Conn, error) {
|
||||
return cc, nil
|
||||
}
|
||||
sniffer := &sniffing.Sniffer{
|
||||
Websocket: h.md.sniffingWebsocket,
|
||||
WebsocketSampleRate: h.md.sniffingWebsocketSampleRate,
|
||||
Recorder: h.recorder.Recorder,
|
||||
RecorderOptions: h.recorder.Options,
|
||||
Certificate: h.md.certificate,
|
||||
PrivateKey: h.md.privateKey,
|
||||
NegotiatedProtocol: h.md.alpn,
|
||||
CertPool: h.certPool,
|
||||
MitmBypass: h.md.mitmBypass,
|
||||
ReadTimeout: h.md.readTimeout,
|
||||
}
|
||||
|
||||
conn = xnet.NewReadWriteConn(br, conn, conn)
|
||||
switch proto {
|
||||
case sniffing.ProtoHTTP:
|
||||
return sniffer.HandleHTTP(ctx, conn,
|
||||
sniffing.WithDial(dial),
|
||||
sniffing.WithDialTLS(dialTLS),
|
||||
sniffing.WithRecorderObject(ro),
|
||||
sniffing.WithLog(log),
|
||||
)
|
||||
case sniffing.ProtoTLS:
|
||||
return sniffer.HandleTLS(ctx, conn,
|
||||
sniffing.WithDial(dial),
|
||||
sniffing.WithDialTLS(dialTLS),
|
||||
sniffing.WithRecorderObject(ro),
|
||||
sniffing.WithLog(log),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
t := time.Now()
|
||||
log.Infof("%s <-> %s", conn.RemoteAddr(), ro.Host)
|
||||
xnet.Transport(conn, cc)
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(t),
|
||||
}).Infof("%s >-< %s", conn.RemoteAddr(), ro.Host)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *ssHandler) checkRateLimit(addr net.Addr) bool {
|
||||
if h.options.RateLimiter == nil {
|
||||
return true
|
||||
}
|
||||
host, _, _ := net.SplitHostPort(addr.String())
|
||||
if limiter := h.options.RateLimiter.Limiter(host); limiter != nil {
|
||||
return limiter.Allow(1)
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
Reference in New Issue
Block a user