2 net.h -- header for net.c
3 Copyright (C) 1998-2003 Ivo Timmermans <zarq@iname.com>
4 2000-2003 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 1.9.4.73 2003/12/20 19:47:52 guus Exp $
23 #ifndef __TINC_NET_H__
24 #define __TINC_NET_H__
26 #include <openssl/evp.h>
30 #ifdef ENABLE_JUMBOGRAMS
31 #define MTU 9014 /* 9000 bytes payload + 14 bytes ethernet header */
33 #define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */
36 #define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
37 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */
39 #define MAXSOCKETS 128 /* Overkill... */
41 #define MAXQUEUELENGTH 8 /* Maximum number of packats in a single queue */
43 typedef struct mac_t {
47 typedef struct ipv4_t {
51 typedef struct ipv6_t {
55 typedef short length_t;
57 #define AF_UNKNOWN 255
59 struct sockaddr_unknown {
67 typedef union sockaddr_t {
69 struct sockaddr_in in;
70 struct sockaddr_in6 in6;
71 struct sockaddr_unknown unknown;
72 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
73 struct sockaddr_storage storage;
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 listen_socket_t {
109 typedef struct outgoing_t {
112 struct config_t *cfg;
114 struct addrinfo *aip;
117 extern int maxtimeout;
118 extern int seconds_till_retry;
119 extern int addressfamily;
121 extern listen_socket_t listen_socket[MAXSOCKETS];
122 extern int listen_sockets;
123 extern int keyexpires;
124 extern int keylifetime;
125 extern bool do_prune;
126 extern bool do_purge;
129 extern EVP_CIPHER_CTX packet_ctx;
131 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
132 #include "connection.h"
135 extern void retry_outgoing(outgoing_t *);
136 extern void handle_incoming_vpn_data(int);
137 extern void finish_connecting(struct connection_t *);
138 extern void do_outgoing_connection(struct connection_t *);
139 extern bool handle_new_meta_connection(int);
140 extern int setup_listen_socket(const sockaddr_t *);
141 extern int setup_vpn_in_socket(const sockaddr_t *);
142 extern void send_packet(const struct node_t *, vpn_packet_t *);
143 extern void receive_tcppacket(struct connection_t *, char *, int);
144 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
145 extern bool 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 int main_loop(void);
150 extern void terminate_connection(struct connection_t *, bool);
151 extern void flush_queue(struct node_t *);
152 extern bool read_rsa_public_key(struct connection_t *);
153 extern void send_mtu_probe(struct node_t *);
156 #define closesocket(s) close(s)
159 #endif /* __TINC_NET_H__ */