2 net.h -- header for net.c
3 Copyright (C) 1998-2001 Ivo Timmermans <zarq@iname.com>
4 2000,2001 Guus Sliepen <guus@sliepen.warande.net>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 $Id: net.h,v 1.9.4.27 2001/01/07 20:19:31 guus Exp $
23 #ifndef __TINC_NET_H__
24 #define __TINC_NET_H__
30 #define MAXSIZE 1700 /* should be a bit more than the MTU for the tapdevice */
33 #define MAC_ADDR_S "%02x:%02x:%02x:%02x:%02x:%02x"
34 #define MAC_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \
35 ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3], \
36 ((unsigned char*)&(x))[4],((unsigned char*)&(x))[5]
38 #define IP_ADDR_S "%d.%d.%d.%d"
40 #ifdef WORDS_BIGENDIAN
41 # define IP_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \
42 ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3]
44 # define IP_ADDR_V(x) ((unsigned char*)&(x))[3],((unsigned char*)&(x))[2], \
45 ((unsigned char*)&(x))[1],((unsigned char*)&(x))[0]
48 #define MAXBUFSIZE 4096 /* Probably way too much, but it must fit every possible request. */
51 #define INDIRECTDATA 0x0001 /* Used to indicate that this host has to be reached indirect */
52 #define EXPORTINDIRECTDATA 0x0002 /* Used to indicate uplink that it has to tell others to do INDIRECTDATA */
53 #define TCPONLY 0x0004 /* Tells sender to send packets over TCP instead of UDP (for firewalls) */
56 #define TAP_TYPE_ETHERTAP 0
57 #define TAP_TYPE_TUNTAP 1
64 typedef unsigned long ipv4_t;
66 typedef ipv4_t ip_t; /* alias for ipv4_t */
73 typedef unsigned short port_t;
75 typedef short length_t;
77 typedef struct vpn_packet_t {
78 length_t len; /* the actual number of bytes in the `data' field */
79 unsigned char data[MAXSIZE];
82 typedef struct queue_element_t {
84 struct queue_element_t *prev;
85 struct queue_element_t *next;
88 typedef struct packet_queue_t {
89 queue_element_t *head;
90 queue_element_t *tail;
93 typedef struct enc_key_t {
101 extern int total_tap_in;
102 extern int total_tap_out;
103 extern int total_socket_in;
104 extern int total_socket_out;
106 extern char *unknown;
108 extern char *request_name[256];
109 extern char *status_text[10];
111 #include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
113 extern int str2opt(const char *);
114 extern char *opt2str(int);
115 extern int send_packet(ip_t, vpn_packet_t *);
116 extern int receive_packet(connection_t *, vpn_packet_t *);
117 extern int setup_network_connections(void);
118 extern void close_network_connections(void);
119 extern void main_loop(void);
120 extern int setup_vpn_connection(connection_t *);
121 extern void terminate_connection(connection_t *);
122 extern void flush_queue(connection_t *);
125 #ifdef HAVE_OPENSSL_RSA_H
126 # include <openssl/rsa.h>
131 extern int read_rsa_public_key(connection_t *);
133 #endif /* __TINC_NET_H__ */