2 net.h -- header for net.c
3 Copyright (C) 1998-2002 Ivo Timmermans <zarq@iname.com>
4 2000-2002 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 1.9.4.47 2002/03/18 22:47:20 guus Exp $
23 #ifndef __TINC_NET_H__
24 #define __TINC_NET_H__
26 #include <sys/types.h>
27 #include <sys/socket.h>
28 #include <netinet/in.h>
33 #define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */
34 #define MAXSIZE 1600 /* MTU + header (seqno) and trailer (CBC padding and HMAC) */
36 #define MAXBUFSIZE 2048 /* Probably way too much, but it must fit every possible request. */
37 #define MAXSOCKETS 128 /* Overkill... */
49 typedef struct ip_mask_t {
59 typedef unsigned short port_t;
61 typedef short length_t;
65 struct sockaddr_in in;
66 struct sockaddr_in6 in6;
70 #define SALEN(s) SA_LEN(&s)
72 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
75 typedef struct vpn_packet_t {
76 length_t len; /* the actual number of bytes in the `data' field */
77 int priority; /* priority or TOS */
78 unsigned int seqno; /* 32 bits sequence number (network byte order of course) */
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 outgoing_t {
101 typedef struct listen_socket_t {
107 extern int maxtimeout;
108 extern int seconds_till_retry;
109 extern int addressfamily;
111 extern char *request_name[];
112 extern char *status_text[];
114 #include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
116 extern listen_socket_t listen_socket[MAXSOCKETS];
117 extern int listen_sockets;
118 extern int keyexpires;
119 extern int keylifetime;
125 extern void retry_outgoing(outgoing_t *);
126 extern void handle_incoming_vpn_data(int);
127 extern void finish_connecting(connection_t *);
128 extern void do_outgoing_connection(connection_t *);
129 extern int handle_new_meta_connection(int);
130 extern int setup_listen_socket(sockaddr_t *);
131 extern int setup_vpn_in_socket(sockaddr_t *);
132 extern void send_packet(struct node_t *, vpn_packet_t *);
133 extern void receive_packet(struct node_t *, vpn_packet_t *);
134 extern void receive_tcppacket(struct connection_t *, char *, int);
135 extern void broadcast_packet(struct node_t *, vpn_packet_t *);
136 extern int setup_network_connections(void);
137 extern void setup_outgoing_connection(struct outgoing_t *);
138 extern void try_outgoing_connections(void);
139 extern void close_network_connections(void);
140 extern void main_loop(void);
141 extern void terminate_connection(connection_t *, int);
142 extern void flush_queue(struct node_t *);
143 extern int read_rsa_public_key(struct connection_t *);
145 #endif /* __TINC_NET_H__ */