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coova-chilli

    1: /* 
    2:  * net library functions
    3:  * Copyright (c) 2008 David Bird <david@coova.com>
    4:  *
    5:  * The contents of this file may be used under the terms of the GNU
    6:  * General Public License Version 2, provided that the above copyright
    7:  * notice and this permission notice is included in all copies or
    8:  * substantial portions of the software.
    9:  * 
   10:  */
   11: 
   12: 
   13: #ifndef _NET_H
   14: #define _NET_H
   15: 
   16: #include "system.h"
   17: #include "pkt.h"
   18: 
   19: typedef struct _net_interface {
   20:   uint8_t idx;
   21: 
   22:   /* hardware/link */
   23:   uint16_t protocol;
   24:   uint8_t hwaddr[PKT_ETH_ALEN];
   25:   char devname[IFNAMSIZ+1];
   26:   int devflags;
   27:   int ifindex;
   28:   int mtu;
   29: 
   30:   /* network/address */
   31:   struct in_addr address;
   32:   struct in_addr gateway;
   33:   struct in_addr netmask;
   34:   struct in_addr broadcast;
   35: 
   36:   /* socket/descriptor */
   37:   int fd;
   38: 
   39:   uint8_t flags;
   40: #define NET_PROMISC (1<<0)
   41: #define NET_USEMAC  (1<<1)
   42: #define NET_ETHHDR  (1<<2)
   43: } net_interface;
   44: 
   45: 
   46: #define net_sflags(n,f) dev_set_flags((n)->devname, (f))
   47: #define net_gflags(n) dev_get_flags((n)->devname, &(n)->devflags)
   48: 
   49: int net_open(net_interface *netif);
   50: int net_open_eth(net_interface *netif);
   51: int net_reopen(net_interface *netif);
   52: int net_init(net_interface *netif, char *ifname, uint16_t protocol, int promisc, uint8_t *mac);
   53: int net_route(struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask, int delete);
   54: 
   55: ssize_t net_read(net_interface *netif, void *d, size_t slen);
   56: ssize_t net_write(net_interface *netif, void *d, size_t slen);
   57: 
   58: #define fd_zero(fds)        FD_ZERO((fds));
   59: #define fd_set(fd,fds)      if ((fd) > 0) FD_SET((fd), (fds))
   60: #define fd_isset(fd,fds)    ((fd) > 0) && FD_ISSET((fd), (fds))
   61: #define fd_max(fd,max)      (max) = (max) > (fd) ? (max) : (fd)
   62: 
   63: #define net_maxfd(this,max) (max) = (max) > (this)->fd ? (max) : (this)->fd
   64: #define net_fdset(this,fds) if ((this)->fd > 0) FD_SET((this)->fd, (fds))
   65: #define net_isset(this,fds) ((this)->fd > 0) && FD_ISSET((this)->fd, (fds))
   66: #define net_close(this)     if ((this)->fd > 0) close((this)->fd); (this)->fd=0
   67: #define net_add_route(dst,gw,mask) net_route(dst,gw,mask,0)
   68: #define net_del_route(dst,gw,mask) net_route(dst,gw,mask,1)
   69: 
   70: int dev_set_flags(char const *dev, int flags);
   71: int dev_get_flags(char const *dev, int *flags);
   72: int dev_set_addr(char const *devname, struct in_addr *addr, 
   73: 		 struct in_addr *gateway, struct in_addr *netmask);
   74: 
   75: int net_set_address(net_interface *netif, struct in_addr *address, 
   76: 		    struct in_addr *gateway, struct in_addr *netmask);
   77: 
   78: #endif