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coova-chilli

    1: /* 
    2:  * TUN interface functions.
    3:  * Copyright (C) 2002, 2003, 2004, 2005 Mondru AB.
    4:  * Copyright (C) 2007-2008 David Bird <david@coova.com>
    5:  * 
    6:  * The contents of this file may be used under the terms of the GNU
    7:  * General Public License Version 2, provided that the above copyright
    8:  * notice and this permission notice is included in all copies or
    9:  * substantial portions of the software.
   10:  * 
   11:  */
   12: 
   13: #ifndef _TUN_H
   14: #define _TUN_H
   15: 
   16: #include "pkt.h"
   17: #include "net.h"
   18: 
   19: #define PACKET_MAX      8196 /* Maximum packet size we receive */
   20: #define TUN_SCRIPTSIZE   512
   21: #define TUN_ADDRSIZE     128
   22: #define TUN_NLBUFSIZE   1024
   23: #define TUN_MAX_INTERFACES 4
   24: 
   25: /* ***********************************************************
   26:  * Information storage for each tun instance
   27:  *************************************************************/
   28: 
   29: struct tun_t {
   30:   int debug;
   31:   int addrs;   /* Number of allocated IP addresses */
   32:   int routes;  /* One if we allocated an automatic route */
   33:   int routeidx; /* default route interface index */
   34:   int (*cb_ind) (struct tun_t *tun, void *pack, size_t len, int idx);
   35: 
   36:   int _interface_count;
   37:   struct _net_interface _interfaces[TUN_MAX_INTERFACES];
   38: };
   39: 
   40: #define tun(x,i) ((x)->_interfaces[(i)])
   41: #define tuntap(x) tun((x),0)
   42: 
   43: int tun_new(struct tun_t **tun);
   44: int tun_free(struct tun_t *this);
   45: int tun_decaps(struct tun_t *this, int idx);
   46: int tun_encaps(struct tun_t *this, void *pack, size_t len, int idx);
   47: 
   48: /*int tun_addaddr(struct tun_t *this, struct in_addr *addr, struct in_addr *dstaddr, struct in_addr *netmask);
   49: int tun_setaddr(struct tun_t *this, struct in_addr *our_adr, struct in_addr *his_adr, struct in_addr *net_mask);
   50: int tun_addroute(struct tun_t *this, struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);
   51: int tun_delroute(struct tun_t *this, struct in_addr *dst, struct in_addr *gateway, struct in_addr *mask);*/
   52: 
   53: int tun_set_cb_ind(struct tun_t *this, int (*cb_ind) (struct tun_t *tun, void *pack, size_t len, int idx));
   54: 
   55: int tun_setaddr(struct tun_t *this, struct in_addr *addr, struct in_addr *dstaddr, struct in_addr *netmask);
   56: 
   57: int tun_runscript(struct tun_t *tun, char* script);
   58: 
   59: net_interface *tun_nextif(struct tun_t *tun);
   60: int tun_name2idx(struct tun_t *tun, char *name);
   61: 
   62: #define tun_maxfd(tun,max) {int i; for (i=0; i<(tun)->_interface_count; i++) net_maxfd(&(tun)->_interfaces[i], (max));}
   63: #define tun_fdset(tun,fds) {int i; for (i=0; i<(tun)->_interface_count; i++) net_fdset(&(tun)->_interfaces[i], (fds));}
   64: #define tun_ckset(tun,fds) {int i; for (i=0; i<(tun)->_interface_count; i++) { \
   65:   if (net_isset(&(tun)->_interfaces[i], (fds)) && tun_decaps((tun), i) < 0) log_err(0, "tun_decaps()"); } }
   66: #define tun_close(tun) {int i; for (i=0; i<(tun)->_interface_count; i++) net_close(&(tun)->_interfaces[i]);}
   67: 
   68: #endif	/* !_TUN_H */