src/net.h (693f1e8) - libetherpix · BlinkenArea

net.h

/*
 * EtherPix library
 *
 * Copyright 2010-2017 Stefan Schuermans <stefan schuermans info>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef ETP_NET_H
#define ETP_NET_H

#ifdef WINDOWS
#  include <stdint.h>
#  include <winsock2.h>
#else
#  include <arpa/inet.h>
#  include <errno.h>
#  include <netdb.h>
#  include <netinet/in.h>
#  include <string.h>
#  include <sys/socket.h>
#  include <unistd.h>
#endif

/** type of socket descriptor */
#ifdef WINDOWS
typedef SOCKET etp_sock_t;
#else
typedef int etp_sock_t;
#endif

#ifdef WINDOWS
/** IP address type missing on Windows */
typedef uint32_t in_addr_t;
#endif

#ifdef WINDOWS
/** port type missing on Windows */
typedef uint16_t in_port_t;
#endif

#ifndef WINDOWS
/** closesocket() only exists for Windows,other OSes just use close() */
static inline int closesocket(int fd)
{
  return close(fd);
}
#endif

/**
 * \brief check a socket descriptor
 * \param[in] sock socket descriptor to check
 * \return 1 if valid, 0 if not valid
 */
static inline int etp_sock_is_valid(etp_sock_t sock)
{
#ifdef WINDOWS
  return sock != INVALID_SOCKET;
#else
  return sock >= 0;
#endif
}

/**
 * \brief get error of last socket call as text
 * \param[in] buf pointer to buffer to place text into
 * \param[in] buflen size of buffer
 */
static inline void etp_sock_get_last_error(char *buf, size_t buflen)
{
#ifdef WINDOWS
  int err = WSAGetLastError();
  FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                NULL, err, 0, buf, buflen, NULL);
#else
  strerror_r(errno, buf, buflen);
#endif
}

#endif /* #ifndef ETP_NET_H */

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