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coova-chilli

/* 
 * net library functions
 * Copyright (c) 2008 David Bird <david@coova.com>
 *
 * The contents of this file may be used under the terms of the GNU
 * General Public License Version 2, provided that the above copyright
 * notice and this permission notice is included in all copies or
 * substantial portions of the software.
 * 
 */


#ifndef _NET_H
#define _NET_H

#include "system.h"
#include "pkt.h"

typedef struct _net_interface {
  uint8_t idx;

  /* hardware/link */
  uint16_t protocol;
  uint8_t hwaddr[PKT_ETH_ALEN];
  char devname[IFNAMSIZ+1];
  int devflags;
  int ifindex;
  int mtu;

  /* network/address */
  struct in_addr address;
  struct in_addr gateway;
  struct in_addr netmask;
  struct in_addr broadcast;

  /* socket/descriptor */
  int fd;

  uint8_t flags;
#define NET_PROMISC (1<<0)
#define NET_USEMAC  (1<<1)
#define NET_ETHHDR  (1<<2)
} net_interface;


#define net_sflags(n,f) dev_set_flags((n)->devname, (f))
#define net_gflags(n) dev_get_flags((n)->devname, &(n)->devflags)

int net_open(net_interface *netif);
int net_open_eth(net_interface *netif);
int net_reopen(net_interface *netif);
int net_init(net_interface *netif, char *ifname, uint16_t protocol, int promisc, uint8_t *mac);
int net_route(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask, int delete);

ssize_t net_read(net_interface *netif, void *d, size_t slen);
ssize_t net_write(net_interface *netif, void *d, size_t slen);

#define fd_zero(fds)        FD_ZERO((fds));
#define fd_set(fd,fds)      if ((fd) > 0) FD_SET((fd), (fds))
#define fd_isset(fd,fds)    ((fd) > 0) && FD_ISSET((fd), (fds))
#define fd_max(fd,max)      (max) = (max) > (fd) ? (max) : (fd)

#define net_maxfd(this,max) (max) = (max) > (this)->fd ? (max) : (this)->fd
#define net_fdset(this,fds) if ((this)->fd > 0) FD_SET((this)->fd, (fds))
#define net_isset(this,fds) ((this)->fd > 0) && FD_ISSET((this)->fd, (fds))
#define net_close(this)     if ((this)->fd > 0) close((this)->fd); (this)->fd=0
#define net_add_route(dst,gw,mask) net_route(dst,gw,mask,0)
#define net_del_route(dst,gw,mask) net_route(dst,gw,mask,1)

int dev_set_flags(char const *dev, int flags);
int dev_get_flags(char const *dev, int *flags);
int dev_set_addr(char const *devname, struct in_addr *addr, 
		 struct in_addr *gateway, struct in_addr *netmask);

int net_set_address(net_interface *netif, struct in_addr *address, 
		    struct in_addr *gateway, struct in_addr *netmask);

#endif