test/ossl_shim/packeted_bio.h

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef HEADER_PACKETED_BIO
  11 #define HEADER_PACKETED_BIO
  12
  13 #include <openssl/base.h>
  14 #include <openssl/bio.h>
  15
  16 // PacketedBioCreate creates a filter BIO which implements a reliable in-order
  17 // blocking datagram socket. It internally maintains a clock and honors
  18 // |BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT| based on it.
  19 //
  20 // During a |BIO_read|, the peer may signal the filter BIO to simulate a
  21 // timeout. If |advance_clock| is true, it automatically advances the clock and
  22 // continues reading, subject to the read deadline. Otherwise, it fails
  23 // immediately. The caller must then call |PacketedBioAdvanceClock| before
  24 // retrying |BIO_read|.
  25 bssl::UniquePtr<BIO> PacketedBioCreate(bool advance_clock);
  26
  27 // PacketedBioGetClock returns the current time for |bio|.
  28 timeval PacketedBioGetClock(const BIO *bio);
  29
  30 // PacketedBioAdvanceClock advances |bio|'s internal clock and returns true if
  31 // there is a pending timeout. Otherwise, it returns false.
  32 bool PacketedBioAdvanceClock(BIO *bio);
  33
  34
  35 #endif  // HEADER_PACKETED_BIO