2 net.h -- header for net.c
3 Copyright (C) 1998-2002 Ivo Timmermans <zarq@iname.com>
4 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
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 1.9.4.56 2003/03/28 13:41:49 guus Exp $
23 #ifndef __TINC_NET_H__
24 #define __TINC_NET_H__
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <netinet/in.h>
32 #include <openssl/evp.h>
34 #ifdef HAVE_INTTYPES_H
38 #ifdef ENABLE_JUMBOGRAMS
39 #define MTU 9014 /* 9000 bytes payload + 14 bytes ethernet header */
40 #define MAXSIZE 9100 /* MTU + header (seqno) and trailer (CBC padding and HMAC) */
41 #define MAXBUFSIZE 9100 /* Must support TCP packets of length 9000. */
43 #define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */
44 #define MAXSIZE 1600 /* MTU + header (seqno) and trailer (CBC padding and HMAC) */
45 #define MAXBUFSIZE 2100 /* Quite large but needed for support of keys up to 8192 bits. */
48 #define MAXSOCKETS 128 /* Overkill... */
50 #define MAXQUEUELENGTH 8 /* Maximum number of packats in a single queue */
52 typedef struct mac_t {
56 typedef struct ipv4_t {
60 typedef struct ip_mask_t {
65 typedef struct ipv6_t {
69 typedef short length_t;
73 struct sockaddr_in in;
74 struct sockaddr_in6 in6;
78 #define SALEN(s) SA_LEN(&s)
80 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
83 typedef struct vpn_packet_t {
84 length_t len; /* the actual number of bytes in the `data' field */
85 int priority; /* priority or TOS */
86 uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
87 uint8_t data[MAXSIZE];
90 typedef struct queue_element_t {
92 struct queue_element_t *prev;
93 struct queue_element_t *next;
96 typedef struct packet_queue_t {
97 queue_element_t *head;
98 queue_element_t *tail;
101 typedef struct outgoing_t {
104 struct config_t *cfg;
106 struct addrinfo *aip;
109 typedef struct listen_socket_t {
115 extern int maxtimeout;
116 extern int seconds_till_retry;
117 extern int addressfamily;
119 extern char *request_name[];
120 extern char *status_text[];
122 #include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
124 extern listen_socket_t listen_socket[MAXSOCKETS];
125 extern int listen_sockets;
126 extern int keyexpires;
127 extern int keylifetime;
132 extern EVP_CIPHER_CTX packet_ctx;
134 extern void retry_outgoing(outgoing_t *);
135 extern void handle_incoming_vpn_data(int);
136 extern void finish_connecting(connection_t *);
137 extern void do_outgoing_connection(connection_t *);
138 extern int handle_new_meta_connection(int);
139 extern int setup_listen_socket(sockaddr_t *);
140 extern int setup_vpn_in_socket(sockaddr_t *);
141 extern void send_packet(struct node_t *, vpn_packet_t *);
142 extern void receive_packet(struct node_t *, vpn_packet_t *);
143 extern void receive_tcppacket(struct connection_t *, char *, int);
144 extern void broadcast_packet(struct node_t *, vpn_packet_t *);
145 extern int setup_network_connections(void);
146 extern void setup_outgoing_connection(struct outgoing_t *);
147 extern void try_outgoing_connections(void);
148 extern void close_network_connections(void);
149 extern void main_loop(void);
150 extern void terminate_connection(connection_t *, int);
151 extern void flush_queue(struct node_t *);
152 extern int read_rsa_public_key(struct connection_t *);
154 #endif /* __TINC_NET_H__ */