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GOAWAY deserialization fix #235

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GOAWAY deserialization fix #235

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12 changes: 10 additions & 2 deletions lib/protocol/framer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -736,6 +736,8 @@ typeSpecificAttributes.GOAWAY = ['last_stream', 'error'];
// +-+-------------------------------------------------------------+
// | Error Code (32) |
// +---------------------------------------------------------------+
// | Additional Debug Data (*) |
// +---------------------------------------------------------------+
//
// The last stream identifier in the GOAWAY frame contains the highest numbered stream identifier
// for which the sender of the GOAWAY frame has received frames on and might have taken some action
Expand All @@ -759,8 +761,8 @@ Serializer.GOAWAY = function writeGoaway(frame, buffers) {
};

Deserializer.GOAWAY = function readGoaway(buffer, frame) {
if (buffer.length !== 8) {
// GOAWAY must have 8 bytes
if (buffer.length < 8) {
// GOAWAY must have at least 8 bytes
return 'FRAME_SIZE_ERROR';
}
frame.last_stream = buffer.readUInt32BE(0) & 0x7fffffff;
Expand All @@ -769,6 +771,12 @@ Deserializer.GOAWAY = function readGoaway(buffer, frame) {
// Unknown error types are to be considered equivalent to INTERNAL ERROR
frame.error = 'INTERNAL_ERROR';
}
// Read remaining data into "debug_data"
// https://http2.github.io/http2-spec/#GOAWAY
// Endpoints MAY append opaque data to the payload of any GOAWAY frame
if (buffer.length > 8) {
frame.debug_data = buffer.slice(8);
}
};

// [WINDOW_UPDATE](https://tools.ietf.org/html/rfc7540#section-6.9)
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