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#ifndef LIBSSH2_TRANSPORT_H
#define LIBSSH2_TRANSPORT_H
/* Copyright (C) The Written Word, Inc.
* Copyright (C) Daniel Stenberg
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* Neither the name of the copyright holder nor the names
* of any other contributors may be used to endorse or
* promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file handles reading and writing to the SECSH transport layer. RFC4253.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "libssh2_priv.h"
#include "packet.h"
/*
* libssh2_transport_send
*
* Send a packet, encrypting it and adding a MAC code if necessary
* Returns 0 on success, non-zero on failure.
*
* The data is provided as _two_ data areas that are combined by this
* function. The 'data' part is sent immediately before 'data2'. 'data2' can
* be set to NULL (or data2_len to 0) to only use a single part.
*
* Returns LIBSSH2_ERROR_EAGAIN if it would block or if the whole packet was
* not sent yet. If it does so, the caller should call this function again as
* soon as it is likely that more data can be sent, and this function MUST
* then be called with the same argument set (same data pointer and same
* data_len) until ERROR_NONE or failure is returned.
*
* This function DOES NOT call _libssh2_error() on any errors.
*/
int _libssh2_transport_send(LIBSSH2_SESSION *session,
const unsigned char *data, size_t data_len,
const unsigned char *data2, size_t data2_len);
/*
* _libssh2_transport_read
*
* Collect a packet into the input brigade block only controls whether or not
* to wait for a packet to start.
*
* Returns packet type added to input brigade (PACKET_NONE if nothing added),
* or PACKET_FAIL on failure and PACKET_EAGAIN if it couldn't process a full
* packet.
*/
/*
* This function reads the binary stream as specified in chapter 6 of RFC4253
* "The Secure Shell (SSH) Transport Layer Protocol"
*/
int _libssh2_transport_read(LIBSSH2_SESSION * session);
#endif /* LIBSSH2_TRANSPORT_H */
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