2 net.h -- header for net.c
3 Copyright (C) 1998,1999,2000 Ivo Timmermans <zarq@iname.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 $Id: net.h,v 1.9.4.14 2000/10/11 10:35:16 guus Exp $
22 #ifndef __TINC_NET_H__
23 #define __TINC_NET_H__
31 #define MAXSIZE 1700 /* should be a bit more than the MTU for the tapdevice */
34 #define MAC_ADDR_S "%02x:%02x:%02x:%02x:%02x:%02x"
35 #define MAC_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \
36 ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3], \
37 ((unsigned char*)&(x))[4],((unsigned char*)&(x))[5]
39 #define IP_ADDR_S "%d.%d.%d.%d"
41 #ifdef WORDS_BIGENDIAN
42 # define IP_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \
43 ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3]
45 # define IP_ADDR_V(x) ((unsigned char*)&(x))[3],((unsigned char*)&(x))[2], \
46 ((unsigned char*)&(x))[1],((unsigned char*)&(x))[0]
49 #define MAXBUFSIZE 2048 /* Probably way too much, but it must fit every possible request. */
52 #define INDIRECTDATA 0x0001 /* Used to indicate that this host has to be reached indirect */
53 #define EXPORTINDIRECTDATA 0x0002 /* Used to indicate uplink that it has to tell others to do INDIRECTDATA */
54 #define TCPONLY 0x0004 /* Tells sender to send packets over TCP instead of UDP (for firewalls) */
61 typedef unsigned long ipv4_t;
63 typedef ipv4_t ip_t; /* alias for ipv4_t */
70 typedef unsigned short port_t;
72 typedef short length_t;
74 typedef struct vpn_packet_t {
75 length_t len; /* the actual number of bytes in the `data' field */
76 unsigned char data[MAXSIZE];
79 typedef struct passphrase_t {
81 unsigned char *phrase;
84 typedef struct status_bits_t {
85 int pinged:1; /* sent ping */
86 int got_pong:1; /* received pong */
87 int meta:1; /* meta connection exists */
88 int active:1; /* 1 if active.. */
89 int outgoing:1; /* I myself asked for this conn */
90 int termreq:1; /* the termination of this connection was requested */
91 int remove:1; /* Set to 1 if you want this connection removed */
92 int timeout:1; /* 1 if gotten timeout */
93 int validkey:1; /* 1 if we currently have a valid key for him */
94 int waitingforkey:1; /* 1 if we already sent out a request */
95 int dataopen:1; /* 1 if we have a valid UDP connection open */
96 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
97 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
101 typedef struct option_bits_t {
105 typedef struct queue_element_t {
107 struct queue_element_t *prev;
108 struct queue_element_t *next;
111 typedef struct packet_queue_t {
112 queue_element_t *head;
113 queue_element_t *tail;
116 typedef struct enc_key_t {
124 extern int total_tap_in;
125 extern int total_tap_out;
126 extern int total_socket_in;
127 extern int total_socket_out;
129 extern char *request_name[256];
130 extern char *status_text[10];
132 extern int str2opt(const char *);
133 extern char *opt2str(int);
134 extern int send_packet(ip_t, vpn_packet_t *);
135 extern int setup_network_connections(void);
136 extern void close_network_connections(void);
137 extern void main_loop(void);
138 extern int setup_vpn_connection(conn_list_t *);
139 extern void terminate_connection(conn_list_t *);
140 extern void flush_queues(conn_list_t*);
141 extern int xrecv(vpn_packet_t *);
142 extern void add_queue(packet_queue_t **, void *, size_t);
144 #endif /* __TINC_NET_H__ */