private void verifyHeadersFrame() throws Http2Exception {
verifyNotProcessingHeaders();
verifyPayloadLength(payloadLength);
int lengthWithoutPriority = flags.getNumPaddingLengthBytes();
if (lengthWithoutPriority < 0) {
throw protocolError("Frame length too small." + payloadLength);
}
if (!flags.isPaddingLengthValid()) {
throw protocolError("Pad high is set but pad low is not");
}
if (lengthWithoutPriority < flags.getNumPaddingLengthBytes()) {
throw protocolError("Frame length %d too small for padding.", payloadLength);
}
}
private void verifyDataFrame() throws Http2Exception {
verifyNotProcessingHeaders();
verifyPayloadLength(payloadLength);
if (!flags.isPaddingLengthValid()) {
throw protocolError("Pad high is set but pad low is not");
}
if (payloadLength < flags.getNumPaddingLengthBytes()) {
throw protocolError("Frame length %d too small.", payloadLength);
}
}
private void verifyPushPromiseFrame() throws Http2Exception {
verifyNotProcessingHeaders();
verifyPayloadLength(payloadLength);
if (!flags.isPaddingLengthValid()) {
throw protocolError("Pad high is set but pad low is not");
}
// Subtract the length of the promised stream ID field, to determine the length of the
// rest of the payload (header block fragment + payload).
int lengthWithoutPromisedId = payloadLength - INT_FIELD_LENGTH;
if (lengthWithoutPromisedId < flags.getNumPaddingLengthBytes()) {
throw protocolError("Frame length %d too small for padding.", payloadLength);
}
}
private void verifyContinuationFrame() throws Http2Exception {
verifyPayloadLength(payloadLength);
if (headersContinuation == null) {
throw protocolError("Received %s frame but not currently processing headers.", frameType);
}
if (streamId != headersContinuation.getStreamId()) {
throw protocolError(
"Continuation stream ID does not match pending headers. "
+ "Expected %d, but received %d.",
headersContinuation.getStreamId(), streamId);
}
if (!flags.isPaddingLengthValid()) {
throw protocolError("Pad high is set but pad low is not");
}
if (payloadLength < flags.getNumPaddingLengthBytes()) {
throw protocolError("Frame length %d too small for padding.", payloadLength);
}
}