2 net.h -- header for net.c
3 Copyright (C) 1998-2005 Ivo Timmermans <zarq@iname.com>
4 2000-2006 Guus Sliepen <guus@tinc-vpn.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.
23 #ifndef __TINC_NET_H__
24 #define __TINC_NET_H__
26 #include <openssl/evp.h>
31 #ifdef ENABLE_JUMBOGRAMS
32 #define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
34 #define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
37 #define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
38 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */
40 #define MAXSOCKETS 8 /* Probably overkill... */
42 #define MAXQUEUELENGTH 8 /* Maximum number of packats in a single queue */
44 typedef struct mac_t {
48 typedef struct ipv4_t {
52 typedef struct ipv6_t {
56 typedef short length_t;
58 #define AF_UNKNOWN 255
60 struct sockaddr_unknown {
68 typedef union sockaddr_t {
70 struct sockaddr_in in;
71 struct sockaddr_in6 in6;
72 struct sockaddr_unknown unknown;
73 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
74 struct sockaddr_storage storage;
79 #define SALEN(s) SA_LEN(&s)
81 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
84 typedef struct vpn_packet_t {
85 length_t len; /* the actual number of bytes in the `data' field */
86 int priority; /* priority or TOS */
87 uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
88 uint8_t data[MAXSIZE];
91 typedef struct queue_element_t {
93 struct queue_element_t *prev;
94 struct queue_element_t *next;
97 typedef struct packet_queue_t {
98 queue_element_t *head;
99 queue_element_t *tail;
102 typedef struct listen_socket_t {
112 typedef struct outgoing_t {
115 struct config_t *cfg;
117 struct addrinfo *aip;
121 extern int maxoutbufsize;
122 extern int seconds_till_retry;
123 extern int addressfamily;
125 extern listen_socket_t listen_socket[MAXSOCKETS];
126 extern int listen_sockets;
127 extern int keylifetime;
128 extern bool do_prune;
130 extern EVP_CIPHER_CTX packet_ctx;
132 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
133 #include "connection.h"
136 extern void retry_outgoing(outgoing_t *);
137 extern void handle_incoming_vpn_data(int, short, void *);
138 extern void finish_connecting(struct connection_t *);
139 extern void do_outgoing_connection(struct connection_t *);
140 extern void handle_new_meta_connection(int, short, void *);
141 extern int setup_listen_socket(const sockaddr_t *);
142 extern int setup_vpn_in_socket(const sockaddr_t *);
143 extern void send_packet(const struct node_t *, vpn_packet_t *);
144 extern void receive_tcppacket(struct connection_t *, char *, int);
145 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
146 extern bool setup_network_connections(void);
147 extern void setup_outgoing_connection(struct outgoing_t *);
148 extern void try_outgoing_connections(void);
149 extern void close_network_connections(void);
150 extern int main_loop(void);
151 extern void terminate_connection(struct connection_t *, bool);
152 extern void flush_queue(struct node_t *);
153 extern bool read_rsa_public_key(struct connection_t *);
154 extern void send_mtu_probe(struct node_t *);
155 extern void handle_device_data(int, short, void *);
156 extern void handle_meta_connection_data(int, short, void *);
157 extern void regenerate_key();
158 extern void purge(void);
159 extern void retry(void);
160 extern int reload_configuration(void);
163 #define closesocket(s) close(s)
166 #endif /* __TINC_NET_H__ */