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 1.9.4.62 2003/07/11 16:13:00 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
40 #ifdef ENABLE_JUMBOGRAMS
41 #define MTU 9014 /* 9000 bytes payload + 14 bytes ethernet header */
43 #define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */
46 #define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
47 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */
49 #define MAXSOCKETS 128 /* Overkill... */
51 #define MAXQUEUELENGTH 8 /* Maximum number of packats in a single queue */
53 typedef struct mac_t {
57 typedef struct ipv4_t {
61 typedef struct ipv6_t {
65 typedef short length_t;
69 struct sockaddr_in in;
70 struct sockaddr_in6 in6;
71 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
72 struct sockaddr_storage storage;
77 #define SALEN(s) SA_LEN(&s)
79 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
82 typedef struct vpn_packet_t {
83 length_t len; /* the actual number of bytes in the `data' field */
84 int priority; /* priority or TOS */
85 uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
86 uint8_t data[MAXSIZE];
89 typedef struct queue_element_t {
91 struct queue_element_t *prev;
92 struct queue_element_t *next;
95 typedef struct packet_queue_t {
96 queue_element_t *head;
97 queue_element_t *tail;
100 typedef struct outgoing_t {
103 struct config_t *cfg;
105 struct addrinfo *aip;
108 typedef struct listen_socket_t {
114 extern int maxtimeout;
115 extern int seconds_till_retry;
116 extern int addressfamily;
118 #include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
120 extern listen_socket_t listen_socket[MAXSOCKETS];
121 extern int listen_sockets;
122 extern int keyexpires;
123 extern int keylifetime;
128 extern EVP_CIPHER_CTX packet_ctx;
130 extern void retry_outgoing(outgoing_t *);
131 extern void handle_incoming_vpn_data(int);
132 extern void finish_connecting(connection_t *);
133 extern void do_outgoing_connection(connection_t *);
134 extern int handle_new_meta_connection(int);
135 extern int setup_listen_socket(sockaddr_t *);
136 extern int setup_vpn_in_socket(sockaddr_t *);
137 extern void send_packet(struct node_t *, vpn_packet_t *);
138 extern void receive_tcppacket(struct connection_t *, char *, int);
139 extern void broadcast_packet(struct node_t *, vpn_packet_t *);
140 extern int setup_network_connections(void);
141 extern void setup_outgoing_connection(struct outgoing_t *);
142 extern void try_outgoing_connections(void);
143 extern void close_network_connections(void);
144 extern void main_loop(void);
145 extern void terminate_connection(connection_t *, int);
146 extern void flush_queue(struct node_t *);
147 extern int read_rsa_public_key(struct connection_t *);
149 #endif /* __TINC_NET_H__ */