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Chore: Clarify the definition of StreamConn and DialContext

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This commit is contained in:
Dreamacro 2021-03-22 23:26:20 +08:00
parent 1355196b7c
commit 807d53c1e7
9 changed files with 79 additions and 46 deletions
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4
adapters/outbound/http.go
View File

@ -51,13 +51,15 @@ func (h *Http) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
return c, nil
}
func (h *Http) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
func (h *Http) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
c, err := dialer.DialContext(ctx, "tcp", h.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", h.addr, err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = h.StreamConn(c, metadata)
if err != nil {
return nil, err

5
adapters/outbound/shadowsocks.go
View File

@ -73,13 +73,15 @@ func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, e
return c, err
}
func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
c, err := dialer.DialContext(ctx, "tcp", ss.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = ss.StreamConn(c, metadata)
return NewConn(c, ss), err
}
@ -92,6 +94,7 @@ func (ss *ShadowSocks) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
addr, err := resolveUDPAddr("udp", ss.addr)
if err != nil {
pc.Close()
return nil, err
}

5
adapters/outbound/shadowsocksr.go
View File

@ -57,13 +57,15 @@ func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn,
return c, err
}
func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
c, err := dialer.DialContext(ctx, "tcp", ssr.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", ssr.addr, err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = ssr.StreamConn(c, metadata)
return NewConn(c, ssr), err
}
@ -76,6 +78,7 @@ func (ssr *ShadowSocksR) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
addr, err := resolveUDPAddr("udp", ssr.addr)
if err != nil {
pc.Close()
return nil, err
}

9
adapters/outbound/snell.go
View File

@ -55,7 +55,7 @@ func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
return c, err
}
func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
if s.version == snell.Version2 {
c, err := s.pool.Get()
if err != nil {
@ -63,7 +63,10 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
}
port, _ := strconv.Atoi(metadata.DstPort)
err = snell.WriteHeader(c, metadata.String(), uint(port), s.version)
if err = snell.WriteHeader(c, metadata.String(), uint(port), s.version); err != nil {
c.Close()
return nil, err
}
return NewConn(c, s), err
}
@ -73,6 +76,8 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = s.StreamConn(c, metadata)
return NewConn(c, s), err
}

10
adapters/outbound/socks5.go
View File

@ -58,13 +58,15 @@ func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
return c, nil
}
func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
c, err := dialer.DialContext(ctx, "tcp", ss.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = ss.StreamConn(c, metadata)
if err != nil {
return nil, err
@ -88,11 +90,7 @@ func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
c = cc
}
defer func() {
if err != nil {
c.Close()
}
}()
defer safeConnClose(c, err)
tcpKeepAlive(c)
var user *socks5.User

34
adapters/outbound/trojan.go
View File

@ -55,8 +55,8 @@ func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
return c, err
}
func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
// gun transport, TODO: Optimize mux dial code
func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
// gun transport
if t.transport != nil {
c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
if err != nil {
@ -76,6 +76,9 @@ func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = t.StreamConn(c, metadata)
if err != nil {
return nil, err
@ -84,30 +87,27 @@ func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
return NewConn(c, t), err
}
func (t *Trojan) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
// gun transport, TODO: Optimize mux dial code
func (t *Trojan) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
var c net.Conn
// grpc transport
if t.transport != nil {
c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
if err != nil {
return nil, err
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
if err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata)); err != nil {
c.Close()
return nil, err
}
pc := t.instance.PacketConn(c)
return newPacketConn(pc, t), err
}
} else {
ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
defer cancel()
c, err := dialer.DialContext(ctx, "tcp", t.addr)
c, err = dialer.DialContext(ctx, "tcp", t.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
tcpKeepAlive(c)
}
defer safeConnClose(c, err)
c, err = t.instance.StreamConn(c)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)

6
adapters/outbound/util.go
View File

@ -98,3 +98,9 @@ func resolveUDPAddr(network, address string) (*net.UDPAddr, error) {
}
return net.ResolveUDPAddr(network, net.JoinHostPort(ip.String(), port))
}
func safeConnClose(c net.Conn, err error) {
if err != nil {
c.Close()
}
}

29
adapters/outbound/vmess.go
View File

@ -170,13 +170,14 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
return v.client.StreamConn(c, parseVmessAddr(metadata))
}
func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
// gun transport, TODO: Optimize mux dial code
func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
// gun transport
if v.transport != nil {
c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
if err != nil {
return nil, err
}
defer safeConnClose(c, err)
c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
if err != nil {
@ -191,12 +192,13 @@ func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = v.StreamConn(c, metadata)
return NewConn(c, v), err
}
func (v *Vmess) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
func (v *Vmess) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
if !metadata.Resolved() {
ip, err := resolver.ResolveIP(metadata.Host)
@ -206,32 +208,33 @@ func (v *Vmess) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
metadata.DstIP = ip
}
// gun transport, TODO: Optimize mux dial code
var c net.Conn
// gun transport
if v.transport != nil {
c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
if err != nil {
return nil, err
}
defer safeConnClose(c, err)
c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
if err != nil {
return nil, err
}
return newPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
}
} else {
ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
defer cancel()
c, err := dialer.DialContext(ctx, "tcp", v.addr)
c, err = dialer.DialContext(ctx, "tcp", v.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = v.StreamConn(c, metadata)
}
if err != nil {
return nil, fmt.Errorf("new vmess client error: %v", err)
}
return newPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
}

13
constant/adapters.go
View File

@ -69,8 +69,21 @@ type PacketConn interface {
type ProxyAdapter interface {
Name() string
Type() AdapterType
// StreamConn wraps a protocol around net.Conn with Metadata.
//
// Examples:
// conn, _ := net.Dial("tcp", "host:port")
// conn, _ = adapter.StreamConn(conn, metadata)
//
// It returns a C.Conn with protocol which start with
// a new session (if any)
StreamConn(c net.Conn, metadata *Metadata) (net.Conn, error)
// DialContext return a C.Conn with protocol which
// contains multiplexing-related reuse logic (if any)
DialContext(ctx context.Context, metadata *Metadata) (Conn, error)
DialUDP(metadata *Metadata) (PacketConn, error)
SupportUDP() bool
MarshalJSON() ([]byte, error)