// Copyright (c) 2014, Google Inc.
// SPDX-License-Identifier: ISC

#ifndef HEADER_ASYNC_BIO
#define HEADER_ASYNC_BIO

#include <openssl/bio.h>


// AsyncBioCreate creates a filter BIO for testing asynchronous state
// machines which consume a stream socket. Reads and writes will fail
// and return EAGAIN unless explicitly allowed. Each async BIO has a
// read quota and a write quota. Initially both are zero. As each is
// incremented, bytes are allowed to flow through the BIO.
bssl::UniquePtr<BIO> AsyncBioCreate();

// AsyncBioCreateDatagram creates a filter BIO for testing for
// asynchronous state machines which consume datagram sockets. The read
// and write quota count in packets rather than bytes.
bssl::UniquePtr<BIO> AsyncBioCreateDatagram();

// AsyncBioAllowRead increments |bio|'s read quota by |count|.
void AsyncBioAllowRead(BIO *bio, size_t count);

// AsyncBioAllowWrite increments |bio|'s write quota by |count|.
void AsyncBioAllowWrite(BIO *bio, size_t count);

// AsyncBioEnforceWriteQuota configures where |bio| enforces its write quota.
void AsyncBioEnforceWriteQuota(BIO *bio, bool enforce);


#endif  // HEADER_ASYNC_BIO