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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_ASYNC_BIO
16 #define HEADER_ASYNC_BIO
17 
18 #include <openssl/bio.h>
19 
20 
21 // AsyncBioCreate creates a filter BIO for testing asynchronous state
22 // machines which consume a stream socket. Reads and writes will fail
23 // and return EAGAIN unless explicitly allowed. Each async BIO has a
24 // read quota and a write quota. Initially both are zero. As each is
25 // incremented, bytes are allowed to flow through the BIO.
26 bssl::UniquePtr<BIO> AsyncBioCreate();
27 
28 // AsyncBioCreateDatagram creates a filter BIO for testing for
29 // asynchronous state machines which consume datagram sockets. The read
30 // and write quota count in packets rather than bytes.
31 bssl::UniquePtr<BIO> AsyncBioCreateDatagram();
32 
33 // AsyncBioAllowRead increments |bio|'s read quota by |count|.
34 void AsyncBioAllowRead(BIO *bio, size_t count);
35 
36 // AsyncBioAllowWrite increments |bio|'s write quota by |count|.
37 void AsyncBioAllowWrite(BIO *bio, size_t count);
38 
39 // AsyncBioEnforceWriteQuota configures where |bio| enforces its write quota.
40 void AsyncBioEnforceWriteQuota(BIO *bio, bool enforce);
41 
42 
43 #endif  // HEADER_ASYNC_BIO
44