glab.h

/*
     This file (was) part of GNUnet.
     Copyright (C) 2010, 2012, 2018 Christian Grothoff

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet 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
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file glab.h
 * @brief Protocol definitions for network-driver
 * @author Christian Grothoff
 */

#ifndef GLAB_IPC_H
#define GLAB_IPC_H

#define _GNU_SOURCE
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stddef.h>
#include <signal.h>
#include <stdlib.h>
#include <stdint.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <byteswap.h>
#include <linux/if.h>
#include <linux/if_tun.h>


/**
 * gcc 4.x-ism to pack structures (to be used before structs);
 * Using this still causes structs to be unaligned on the stack on Sparc
 * (See #670578 from Debian).
 */
_Pragma("pack(push)") _Pragma("pack(1)")

/**
 * Header for all communications between components.
 */
struct GLAB_MessageHeader
{

  /**
   * The length of the struct (in bytes, including the length field itself),
   * in big-endian format.
   */
  uint16_t size;

  /**
   * The type of the message. 0 for 'control' (commands, feedback for
   * user), otherwise packets received from or to be sent to an
   * adapter. The first control message includes the list of all MAC
   * addresses in the body. In all other cases, type is used to
   * specify the number of the adapter (counting from 1).
   */
  uint16_t type;

};


/**
 * Number of bytes in a MAC.
 */
#define MAC_ADDR_SIZE 6


/**
 * A MAC Address.
 */
struct MacAddress
{
  uint8_t mac[MAC_ADDR_SIZE];
};


_Pragma("pack(pop)")


#endif