diff options
Diffstat (limited to 'ggsn/tun.h')
| -rw-r--r-- | ggsn/tun.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/ggsn/tun.h b/ggsn/tun.h new file mode 100644 index 0000000..03dc7df --- /dev/null +++ b/ggsn/tun.h @@ -0,0 +1,48 @@ +/* + * OpenGGSN - Gateway GPRS Support Node + * Copyright (C) 2002 Mondru AB. + * + * 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. + * + * The initial developer of the original code is + * Jens Jakobsen <jj@openggsn.org> + * + * Contributor(s): + * + */ + +#ifndef _TUN_H +#define _TUN_H + +#define hton8(x) (x) +#define ntoh8(x) (x) +#define hton16(x) htons(x) +#define ntoh16(x) ntohs(x) +#define hton32(x) htonl(x) +#define ntoh32(x) ntohl(x) + +#define PACKET_MAX 8196 /* TODO */ + +/* *********************************************************** + * Information storage for each tun instance + *************************************************************/ + +struct tun_t { + int fd; /* File descriptor to network interface */ + struct in_addr addr; /* IP address of tun interface */ + char devname[IFNAMSIZ];/* Name of the tun device */ +}; + + +extern int tun_newtun(struct tun_t **tun); +extern int tun_freetun(struct tun_t *tun); +extern int tun_decaps(struct tun_t *tun, + int (*cb) (void *cl, struct tun_t*, void *pack, unsigned len), + void *cl); +extern int tun_encaps(struct tun_t *tun, void *pack, unsigned len); + + +#endif /* !_TUN_H */ |