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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #ifndef WebSocketFrame_h | 31 #ifndef WebSocketFrame_h |
32 #define WebSocketFrame_h | 32 #define WebSocketFrame_h |
33 | 33 |
34 #include "wtf/text/WTFString.h" | |
35 | |
36 namespace blink { | 34 namespace blink { |
37 | 35 |
38 struct WebSocketFrame { | 36 struct WebSocketFrame { |
39 // RFC6455 opcodes. | 37 // RFC6455 opcodes. |
40 enum OpCode { | 38 enum OpCode { |
41 OpCodeContinuation = 0x0, | 39 OpCodeContinuation = 0x0, |
42 OpCodeText = 0x1, | 40 OpCodeText = 0x1, |
43 OpCodeBinary = 0x2, | 41 OpCodeBinary = 0x2, |
44 OpCodeClose = 0x8, | 42 OpCodeClose = 0x8, |
45 OpCodePing = 0x9, | 43 OpCodePing = 0x9, |
46 OpCodePong = 0xA, | 44 OpCodePong = 0xA, |
47 OpCodeInvalid = 0x10 | 45 OpCodeInvalid = 0x10 |
48 }; | 46 }; |
49 | 47 |
50 enum ParseFrameResult { | |
51 FrameOK, | |
52 FrameIncomplete, | |
53 FrameError | |
54 }; | |
55 | |
56 static bool isNonControlOpCode(OpCode opCode) { return opCode == OpCodeConti
nuation || opCode == OpCodeText || opCode == OpCodeBinary; } | |
57 static bool isControlOpCode(OpCode opCode) { return opCode == OpCodeClose ||
opCode == OpCodePing || opCode == OpCodePong; } | |
58 static bool isReservedOpCode(OpCode opCode) { return !isNonControlOpCode(opC
ode) && !isControlOpCode(opCode); } | |
59 static bool needsExtendedLengthField(size_t payloadLength); | |
60 static ParseFrameResult parseFrame(char* data, size_t dataLength, WebSocketF
rame&, const char*& frameEnd, String& errorString); // May modify part of data t
o unmask the frame. | |
61 | |
62 // Flags for the constructor. | 48 // Flags for the constructor. |
63 // This is not the bitmasks for frame composition / decomposition. | 49 // This is not the bitmasks for frame composition / decomposition. |
64 enum { | 50 enum { |
65 EmptyFlags = 0, | 51 EmptyFlags = 0, |
66 Final = 1, | 52 Final = 1, |
67 Reserved1 = 2, | 53 Reserved1 = 2, |
68 Compress = 2, | 54 Compress = 2, |
69 Reserved2 = 4, | 55 Reserved2 = 4, |
70 Reserved3 = 8, | 56 Reserved3 = 8, |
71 Masked = 16, | 57 Masked = 16, |
72 }; | 58 }; |
73 typedef unsigned Flags; | 59 typedef unsigned Flags; |
74 WebSocketFrame(); | |
75 // The Flags parameter shall be a combination of above flags. | 60 // The Flags parameter shall be a combination of above flags. |
76 WebSocketFrame(OpCode, const char* payload, size_t payloadLength, Flags = Em
ptyFlags); | 61 WebSocketFrame(OpCode, const char* payload, size_t payloadLength, Flags = Em
ptyFlags); |
77 void makeFrameData(Vector<char>& frameData); | |
78 | 62 |
79 OpCode opCode; | 63 OpCode opCode; |
80 bool final; | 64 bool final; |
81 bool compress; | 65 bool compress; |
82 bool reserved2; | 66 bool reserved2; |
83 bool reserved3; | 67 bool reserved3; |
84 bool masked; | 68 bool masked; |
85 const char* payload; | 69 const char* payload; |
86 size_t payloadLength; | 70 size_t payloadLength; |
87 }; | 71 }; |
88 | 72 |
89 } // namespace blink | 73 } // namespace blink |
90 | 74 |
91 #endif // WebSocketFrame_h | 75 #endif // WebSocketFrame_h |
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