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1 /* Copyright (c) 2014, Google Inc.
2  *
3  * Permission to use, copy, modify, and/or distribute this software for any
4  * purpose with or without fee is hereby granted, provided that the above
5  * copyright notice and this permission notice appear in all copies.
6  *
7  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14 
15 #ifndef HEADER_PACKETED_BIO
16 #define HEADER_PACKETED_BIO
17 
18 #include <openssl/base.h>
19 #include <openssl/bio.h>
20 
21 #include "../../crypto/test/scoped_types.h"
22 
23 #if defined(OPENSSL_WINDOWS)
24 #pragma warning(push, 3)
25 #include <winsock2.h>
26 #pragma warning(pop)
27 #else
28 #include <sys/types.h>
29 #endif
30 
31 
32 // PacketedBioCreate creates a filter BIO which implements a reliable in-order
33 // blocking datagram socket. The resulting BIO, on |BIO_read|, may simulate a
34 // timeout which sets |*out_timeout| to the timeout and fails the read.
35 // |*out_timeout| must be zero on entry to |BIO_read|; it is an error to not
36 // apply the timeout before the next |BIO_read|.
37 //
38 // Note: The read timeout simulation is intended to be used with the async BIO
39 // wrapper. It doesn't simulate BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT, used in DTLS's
40 // blocking mode.
41 ScopedBIO PacketedBioCreate(timeval *out_timeout);
42 
43 
44 #endif  // HEADER_PACKETED_BIO
45