Breaking Change: merge BoringSSL branch into master

runtime/bin/net/nss_memio.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-// Written in NSPR style to also be suitable for adding to the NSS demo suite
-
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// This file is a modified copy of Chromium's src/net/base/nss_memio.h.
-// char* has been changed to uint8_t* everywhere, and C++ casts are used.
-// Revision 291806 (this should agree with "nss_rev" in DEPS).
-
-#ifndef BIN_NET_NSS_MEMIO_H_
-#define BIN_NET_NSS_MEMIO_H_
-
-#include <stddef.h>
-#include "vm/globals.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include "prio.h"
-
-/* Opaque structure.  Really just a more typesafe alias for PRFilePrivate. */
-struct memio_Private;
-typedef struct memio_Private memio_Private;
-
-/*----------------------------------------------------------------------
- NSPR I/O layer that terminates in a pair of circular buffers
- rather than talking to the real network.
- To use this with NSS:
- 1) call memio_CreateIOLayer to create a fake NSPR socket
- 2) call SSL_ImportFD to ssl-ify the socket
- 3) Do your own networking calls to set up a TCP connection
- 4) call memio_SetPeerName to tell NSS about the other end of the connection
- 5) While at the same time doing plaintext nonblocking NSPR I/O as
-    usual to the nspr file descriptor returned by SSL_ImportFD,
-    your app must shuttle encrypted data between
-    the real network and memio's network buffers.
-    memio_GetReadParams/memio_PutReadResult
-    are the hooks you need to pump data into memio's input buffer,
-    and memio_GetWriteParams/memio_PutWriteResult
-    are the hooks you need to pump data out of memio's output buffer.
-----------------------------------------------------------------------*/
-
-/* Create the I/O layer and its two circular buffers. */
-PRFileDesc *memio_CreateIOLayer(int readbufsize, int writebufsize);
-
-/* Must call before trying to make an ssl connection */
-void memio_SetPeerName(PRFileDesc *fd, const PRNetAddr *peername);
-
-/* Return a private pointer needed by the following
- * four functions.  (We could have passed a PRFileDesc to
- * them, but that would be slower.  Better for the caller
- * to grab the pointer once and cache it.
- * This may be a premature optimization.)
- */
-memio_Private *memio_GetSecret(PRFileDesc *fd);
-
-/* Ask memio how many bytes were requested by a higher layer if the
- * last attempt to read data resulted in PR_WOULD_BLOCK_ERROR, due to the
- * transport buffer being empty. If the last attempt to read data from the
- * memio did not result in PR_WOULD_BLOCK_ERROR, returns 0.
- */
-int memio_GetReadRequest(memio_Private *secret);
-
-/* Ask memio where to put bytes from the network, and how many it can handle.
- * Returns bytes available to write, or 0 if none available.
- * Puts current buffer position into *buf.
- */
-int memio_GetReadParams(memio_Private *secret, uint8_t **buf);
-
-/* Ask memio how many bytes are contained in the internal buffer.
- * Returns bytes available to read, or 0 if none available.
- */
-int memio_GetReadableBufferSize(memio_Private *secret);
-
-/* Tell memio how many bytes were read from the network.
- * If bytes_read is 0, causes EOF to be reported to
- * NSS after it reads the last byte from the circular buffer.
- * If bytes_read is < 0, it is treated as an NSPR error code.
- * See nspr/pr/src/md/unix/unix_errors.c for how to
- * map from Unix errors to NSPR error codes.
- * On EWOULDBLOCK or the equivalent, don't call this function.
- */
-void memio_PutReadResult(memio_Private *secret, int bytes_read);
-
-/* Ask memio what data it has to send to the network.
- * If there was previous a write error, the NSPR error code is returned.
- * Otherwise, it returns 0 and provides up to two buffers of data by
- * writing the positions and lengths into |buf1|, |len1| and |buf2|, |len2|.
- */
-int memio_GetWriteParams(memio_Private *secret,
-                         const uint8_t **buf1, unsigned int *len1,
-                         const uint8_t **buf2, unsigned int *len2);
-
-/* Tell memio how many bytes were sent to the network.
- * If bytes_written is < 0, it is treated as an NSPR error code.
- * See nspr/pr/src/md/unix/unix_errors.c for how to
- * map from Unix errors to NSPR error codes.
- * On EWOULDBLOCK or the equivalent, don't call this function.
- */
-void memio_PutWriteResult(memio_Private *secret, int bytes_written);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // BIN_NET_NSS_MEMIO_H_