66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/*
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* TUN interface functions.
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* Copyright (C) 2002, 2003 Mondru AB.
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* Copyright (C) 2017-2018 by Harald Welte <laforge@gnumonks.org>
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*
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* The contents of this file may be used under the terms of the GNU
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* General Public License Version 2, provided that the above copyright
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* notice and this permission notice is included in all copies or
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* substantial portions of the software.
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*
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*/
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#ifndef _TUN_H
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#define _TUN_H
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#include <stdbool.h>
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#include <net/if.h>
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#include "../lib/in46_addr.h"
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#define PACKET_MAX 8196 /* Maximum packet size we receive */
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#define TUN_SCRIPTSIZE 256
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#define TUN_ADDRSIZE 128
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#include "config.h"
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#include "netdev.h"
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/* ***********************************************************
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* Information storage for each tun instance
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*************************************************************/
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struct tun_t {
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int fd; /* File descriptor to tun interface */
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struct in46_addr addr;
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struct in46_addr dstaddr;
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struct in_addr netmask;
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int addrs; /* Number of allocated IP addresses */
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int routes; /* One if we allocated an automatic route */
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char devname[IFNAMSIZ]; /* Name of the tun device */
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int (*cb_ind) (struct tun_t * tun, void *pack, unsigned len);
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/* to be used by libgtp callers/users (to attach their own private state) */
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void *priv;
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};
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extern int tun_new(struct tun_t **tun, const char *dev_name, bool use_kernel, int fd0, int fd1u);
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extern int tun_free(struct tun_t *tun);
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extern int tun_decaps(struct tun_t *this);
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extern int tun_encaps(struct tun_t *tun, void *pack, unsigned len);
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extern int tun_addaddr(struct tun_t *this, struct in46_addr *addr,
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struct in46_addr *dstaddr, size_t prefixlen);
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extern int tun_set_cb_ind(struct tun_t *this,
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int (*cb_ind) (struct tun_t * tun, void *pack,
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unsigned len));
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extern int tun_runscript(struct tun_t *tun, char *script);
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int tun_ip_local_get(const struct tun_t *tun, struct in46_prefix *prefix_list,
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size_t prefix_size, int flags);
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#define LOGTUN(level, tun, fmt, args...) \
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LOGP(DTUN, level, "TUN(%s): " fmt, (tun)->devname, ## args)
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#endif /* !_TUN_H */
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