tinc/src/net.h

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/*
net.h -- header for net.c
Copyright (C) 1998-2001 Ivo Timmermans <zarq@iname.com>
2000,2001 Guus Sliepen <guus@sliepen.warande.net>
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: net.h,v 1.9.4.32 2001/06/05 16:09:55 guus Exp $
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*/
#ifndef __TINC_NET_H__
#define __TINC_NET_H__
#include <sys/time.h>
#include "config.h"
#define MAXSIZE 1700 /* should be a bit more than the MTU for the tapdevice */
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#define MTU 1600
#define SALTLEN 2 /* to spice things up for the NSA... */
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#define MAC_ADDR_S "%02x:%02x:%02x:%02x:%02x:%02x"
#define MAC_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \
((unsigned char*)&(x))[2],((unsigned char*)&(x))[3], \
((unsigned char*)&(x))[4],((unsigned char*)&(x))[5]
#define IP_ADDR_S "%d.%d.%d.%d"
#ifdef WORDS_BIGENDIAN
# define IP_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \
((unsigned char*)&(x))[2],((unsigned char*)&(x))[3]
#else
# define IP_ADDR_V(x) ((unsigned char*)&(x))[3],((unsigned char*)&(x))[2], \
((unsigned char*)&(x))[1],((unsigned char*)&(x))[0]
#endif
#define MAXBUFSIZE 4096 /* Probably way too much, but it must fit every possible request. */
/* tap types */
#define TAP_TYPE_ETHERTAP 0
#define TAP_TYPE_TUNTAP 1
typedef struct mac_t
{
unsigned char x[6];
} mac_t;
typedef unsigned long ipv4_t;
typedef struct ipv6_t
{
unsigned short x[8];
} ipv6_t;
typedef unsigned short port_t;
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typedef short length_t;
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typedef struct vpn_packet_t {
length_t len; /* the actual number of bytes in the `data' field */
unsigned char salt[SALTLEN]; /* two bytes of randomness */
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unsigned char data[MAXSIZE];
} vpn_packet_t;
typedef struct queue_element_t {
void *packet;
struct queue_element_t *prev;
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struct queue_element_t *next;
} queue_element_t;
typedef struct packet_queue_t {
queue_element_t *head;
queue_element_t *tail;
} packet_queue_t;
typedef struct enc_key_t {
int length;
char *key;
time_t expiry;
} enc_key_t;
extern int tap_fd;
extern int total_tap_in;
extern int total_tap_out;
extern int total_socket_in;
extern int total_socket_out;
extern char *request_name[256];
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extern char *status_text[10];
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#include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
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extern int str2opt(const char *);
extern char *opt2str(int);
extern void send_packet(connection_t *, vpn_packet_t *);
extern void receive_packet(connection_t *, vpn_packet_t *);
extern void receive_tcppacket(connection_t *, char *, int);
extern void accept_packet(vpn_packet_t *);
extern void broadcast_packet(connection_t *, vpn_packet_t *);
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extern int setup_network_connections(void);
extern void close_network_connections(void);
extern void main_loop(void);
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extern void terminate_connection(connection_t *);
extern void flush_queue(connection_t *);
#include <config.h>
#ifdef HAVE_OPENSSL_RSA_H
# include <openssl/rsa.h>
#else
# include <rsa.h>
#endif
extern int read_rsa_public_key(connection_t *);
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#endif /* __TINC_NET_H__ */