|
| 1 | +//go:build go1.25 && !without_badtls |
| 2 | + |
| 3 | +package badtls |
| 4 | + |
| 5 | +import ( |
| 6 | + "bytes" |
| 7 | + "os" |
| 8 | + "reflect" |
| 9 | + "sync/atomic" |
| 10 | + "unsafe" |
| 11 | + |
| 12 | + E "github.com/sagernet/sing/common/exceptions" |
| 13 | + "github.com/sagernet/sing/common/tls" |
| 14 | +) |
| 15 | + |
| 16 | +type RawConn struct { |
| 17 | + pointer unsafe.Pointer |
| 18 | + methods *Methods |
| 19 | + |
| 20 | + IsClient *bool |
| 21 | + IsHandshakeComplete *atomic.Bool |
| 22 | + Vers *uint16 |
| 23 | + CipherSuite *uint16 |
| 24 | + |
| 25 | + RawInput *bytes.Buffer |
| 26 | + Input *bytes.Reader |
| 27 | + Hand *bytes.Buffer |
| 28 | + |
| 29 | + CloseNotifySent *bool |
| 30 | + CloseNotifyErr *error |
| 31 | + |
| 32 | + In *RawHalfConn |
| 33 | + Out *RawHalfConn |
| 34 | + |
| 35 | + BytesSent *int64 |
| 36 | + PacketsSent *int64 |
| 37 | + |
| 38 | + ActiveCall *atomic.Int32 |
| 39 | + Tmp *[16]byte |
| 40 | +} |
| 41 | + |
| 42 | +func NewRawConn(rawTLSConn tls.Conn) (*RawConn, error) { |
| 43 | + var ( |
| 44 | + pointer unsafe.Pointer |
| 45 | + methods *Methods |
| 46 | + loaded bool |
| 47 | + ) |
| 48 | + for _, tlsCreator := range methodRegistry { |
| 49 | + pointer, methods, loaded = tlsCreator(rawTLSConn) |
| 50 | + if loaded { |
| 51 | + break |
| 52 | + } |
| 53 | + } |
| 54 | + if !loaded { |
| 55 | + return nil, os.ErrInvalid |
| 56 | + } |
| 57 | + |
| 58 | + conn := &RawConn{ |
| 59 | + pointer: pointer, |
| 60 | + methods: methods, |
| 61 | + } |
| 62 | + |
| 63 | + rawConn := reflect.Indirect(reflect.ValueOf(rawTLSConn)) |
| 64 | + |
| 65 | + rawIsClient := rawConn.FieldByName("isClient") |
| 66 | + if !rawIsClient.IsValid() || rawIsClient.Kind() != reflect.Bool { |
| 67 | + return nil, E.New("invalid Conn.isClient") |
| 68 | + } |
| 69 | + conn.IsClient = (*bool)(unsafe.Pointer(rawIsClient.UnsafeAddr())) |
| 70 | + |
| 71 | + rawIsHandshakeComplete := rawConn.FieldByName("isHandshakeComplete") |
| 72 | + if !rawIsHandshakeComplete.IsValid() || rawIsHandshakeComplete.Kind() != reflect.Struct { |
| 73 | + return nil, E.New("invalid Conn.isHandshakeComplete") |
| 74 | + } |
| 75 | + conn.IsHandshakeComplete = (*atomic.Bool)(unsafe.Pointer(rawIsHandshakeComplete.UnsafeAddr())) |
| 76 | + |
| 77 | + rawVers := rawConn.FieldByName("vers") |
| 78 | + if !rawVers.IsValid() || rawVers.Kind() != reflect.Uint16 { |
| 79 | + return nil, E.New("invalid Conn.vers") |
| 80 | + } |
| 81 | + conn.Vers = (*uint16)(unsafe.Pointer(rawVers.UnsafeAddr())) |
| 82 | + |
| 83 | + rawCipherSuite := rawConn.FieldByName("cipherSuite") |
| 84 | + if !rawCipherSuite.IsValid() || rawCipherSuite.Kind() != reflect.Uint16 { |
| 85 | + return nil, E.New("invalid Conn.cipherSuite") |
| 86 | + } |
| 87 | + conn.CipherSuite = (*uint16)(unsafe.Pointer(rawCipherSuite.UnsafeAddr())) |
| 88 | + |
| 89 | + rawRawInput := rawConn.FieldByName("rawInput") |
| 90 | + if !rawRawInput.IsValid() || rawRawInput.Kind() != reflect.Struct { |
| 91 | + return nil, E.New("invalid Conn.rawInput") |
| 92 | + } |
| 93 | + conn.RawInput = (*bytes.Buffer)(unsafe.Pointer(rawRawInput.UnsafeAddr())) |
| 94 | + |
| 95 | + rawInput := rawConn.FieldByName("input") |
| 96 | + if !rawInput.IsValid() || rawInput.Kind() != reflect.Struct { |
| 97 | + return nil, E.New("invalid Conn.input") |
| 98 | + } |
| 99 | + conn.Input = (*bytes.Reader)(unsafe.Pointer(rawInput.UnsafeAddr())) |
| 100 | + |
| 101 | + rawHand := rawConn.FieldByName("hand") |
| 102 | + if !rawHand.IsValid() || rawHand.Kind() != reflect.Struct { |
| 103 | + return nil, E.New("invalid Conn.hand") |
| 104 | + } |
| 105 | + conn.Hand = (*bytes.Buffer)(unsafe.Pointer(rawHand.UnsafeAddr())) |
| 106 | + |
| 107 | + rawCloseNotifySent := rawConn.FieldByName("closeNotifySent") |
| 108 | + if !rawCloseNotifySent.IsValid() || rawCloseNotifySent.Kind() != reflect.Bool { |
| 109 | + return nil, E.New("invalid Conn.closeNotifySent") |
| 110 | + } |
| 111 | + conn.CloseNotifySent = (*bool)(unsafe.Pointer(rawCloseNotifySent.UnsafeAddr())) |
| 112 | + |
| 113 | + rawCloseNotifyErr := rawConn.FieldByName("closeNotifyErr") |
| 114 | + if !rawCloseNotifyErr.IsValid() || rawCloseNotifyErr.Kind() != reflect.Interface { |
| 115 | + return nil, E.New("invalid Conn.closeNotifyErr") |
| 116 | + } |
| 117 | + conn.CloseNotifyErr = (*error)(unsafe.Pointer(rawCloseNotifyErr.UnsafeAddr())) |
| 118 | + |
| 119 | + rawIn := rawConn.FieldByName("in") |
| 120 | + if !rawIn.IsValid() || rawIn.Kind() != reflect.Struct { |
| 121 | + return nil, E.New("invalid Conn.in") |
| 122 | + } |
| 123 | + halfIn, err := NewRawHalfConn(rawIn, methods) |
| 124 | + if err != nil { |
| 125 | + return nil, E.Cause(err, "invalid Conn.in") |
| 126 | + } |
| 127 | + conn.In = halfIn |
| 128 | + |
| 129 | + rawOut := rawConn.FieldByName("out") |
| 130 | + if !rawOut.IsValid() || rawOut.Kind() != reflect.Struct { |
| 131 | + return nil, E.New("invalid Conn.out") |
| 132 | + } |
| 133 | + halfOut, err := NewRawHalfConn(rawOut, methods) |
| 134 | + if err != nil { |
| 135 | + return nil, E.Cause(err, "invalid Conn.out") |
| 136 | + } |
| 137 | + conn.Out = halfOut |
| 138 | + |
| 139 | + rawBytesSent := rawConn.FieldByName("bytesSent") |
| 140 | + if !rawBytesSent.IsValid() || rawBytesSent.Kind() != reflect.Int64 { |
| 141 | + return nil, E.New("invalid Conn.bytesSent") |
| 142 | + } |
| 143 | + conn.BytesSent = (*int64)(unsafe.Pointer(rawBytesSent.UnsafeAddr())) |
| 144 | + |
| 145 | + rawPacketsSent := rawConn.FieldByName("packetsSent") |
| 146 | + if !rawPacketsSent.IsValid() || rawPacketsSent.Kind() != reflect.Int64 { |
| 147 | + return nil, E.New("invalid Conn.packetsSent") |
| 148 | + } |
| 149 | + conn.PacketsSent = (*int64)(unsafe.Pointer(rawPacketsSent.UnsafeAddr())) |
| 150 | + |
| 151 | + rawActiveCall := rawConn.FieldByName("activeCall") |
| 152 | + if !rawActiveCall.IsValid() || rawActiveCall.Kind() != reflect.Struct { |
| 153 | + return nil, E.New("invalid Conn.activeCall") |
| 154 | + } |
| 155 | + conn.ActiveCall = (*atomic.Int32)(unsafe.Pointer(rawActiveCall.UnsafeAddr())) |
| 156 | + |
| 157 | + rawTmp := rawConn.FieldByName("tmp") |
| 158 | + if !rawTmp.IsValid() || rawTmp.Kind() != reflect.Array || rawTmp.Len() != 16 || rawTmp.Type().Elem().Kind() != reflect.Uint8 { |
| 159 | + return nil, E.New("invalid Conn.tmp") |
| 160 | + } |
| 161 | + conn.Tmp = (*[16]byte)(unsafe.Pointer(rawTmp.UnsafeAddr())) |
| 162 | + |
| 163 | + return conn, nil |
| 164 | +} |
| 165 | + |
| 166 | +func (c *RawConn) ReadRecord() error { |
| 167 | + return c.methods.readRecord(c.pointer) |
| 168 | +} |
| 169 | + |
| 170 | +func (c *RawConn) HandlePostHandshakeMessage() error { |
| 171 | + return c.methods.handlePostHandshakeMessage(c.pointer) |
| 172 | +} |
| 173 | + |
| 174 | +func (c *RawConn) WriteRecordLocked(typ uint16, data []byte) (int, error) { |
| 175 | + return c.methods.writeRecordLocked(c.pointer, typ, data) |
| 176 | +} |
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