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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
#ifndef OPENVPN_BUFFER_BUFREAD_H
#define OPENVPN_BUFFER_BUFREAD_H
#include <unistd.h>
#include <errno.h>
#include <string>
#include <cstring>
#include <openvpn/common/size.hpp>
#include <openvpn/common/exception.hpp>
#include <openvpn/common/strerror.hpp>
#include <openvpn/buffer/buflist.hpp>
namespace openvpn {
OPENVPN_EXCEPTION(buf_read_error);
inline bool buf_read(const int fd, Buffer &buf, const std::string &title)
{
const ssize_t status = ::read(fd, buf.data_end(), buf.remaining(0));
if (status < 0)
{
const int eno = errno;
OPENVPN_THROW(buf_read_error, "on " << title << " : " << strerror_str(eno));
}
else if (!status)
return false;
buf.inc_size(status);
return true;
}
inline BufferList buf_read(const int fd, const std::string &title)
{
BufferList buflist;
while (true)
{
BufferAllocated buf(1024, 0);
if (!buf_read(fd, buf, title))
break;
buflist.put_consume(buf);
}
return buflist;
}
} // namespace openvpn
#endif
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