2 net.h -- header for net.c
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2009 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 along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #ifndef __TINC_NET_H__
22 #define __TINC_NET_H__
28 #ifdef ENABLE_JUMBOGRAMS
29 #define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
31 #define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
34 #define MAXSIZE (MTU + 4 + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
35 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */
37 #define MAXSOCKETS 8 /* Probably overkill... */
39 typedef struct mac_t {
43 typedef struct ipv4_t {
47 typedef struct ipv6_t {
51 typedef short length_t;
53 #define AF_UNKNOWN 255
55 struct sockaddr_unknown {
63 typedef union sockaddr_t {
65 struct sockaddr_in in;
66 struct sockaddr_in6 in6;
67 struct sockaddr_unknown unknown;
68 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
69 struct sockaddr_storage storage;
74 #define SALEN(s) SA_LEN(&s)
76 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
79 typedef struct vpn_packet_t {
80 length_t len; /* the actual number of bytes in the `data' field */
81 int priority; /* priority or TOS */
82 uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
83 uint8_t data[MAXSIZE];
86 typedef struct listen_socket_t {
97 typedef struct outgoing_t {
100 struct config_t *cfg;
102 struct addrinfo *aip;
106 extern list_t *outgoing_list;
108 extern int maxoutbufsize;
109 extern int seconds_till_retry;
110 extern int addressfamily;
112 extern listen_socket_t listen_socket[MAXSOCKETS];
113 extern int listen_sockets;
114 extern int keylifetime;
115 extern bool do_prune;
118 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
119 #include "connection.h"
122 extern void retry_outgoing(outgoing_t *);
123 extern void handle_incoming_vpn_data(int, short, void *);
124 extern void finish_connecting(struct connection_t *);
125 extern void do_outgoing_connection(struct connection_t *);
126 extern void handle_new_meta_connection(int, short, void *);
127 extern int setup_listen_socket(const sockaddr_t *);
128 extern int setup_vpn_in_socket(const sockaddr_t *);
129 extern void send_packet(const struct node_t *, vpn_packet_t *);
130 extern void receive_tcppacket(struct connection_t *, char *, int);
131 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
132 extern bool setup_network(void);
133 extern void setup_outgoing_connection(struct outgoing_t *);
134 extern void try_outgoing_connections(void);
135 extern void close_network_connections(void);
136 extern int main_loop(void);
137 extern void terminate_connection(struct connection_t *, bool);
138 extern void flush_queue(struct node_t *);
139 extern bool read_rsa_public_key(struct connection_t *);
140 extern void send_mtu_probe(struct node_t *);
141 extern void handle_device_data(int, short, void *);
142 extern void handle_meta_connection_data(int, short, void *);
143 extern void regenerate_key();
144 extern void purge(void);
145 extern void retry(void);
146 extern int reload_configuration(void);
149 #define closesocket(s) close(s)
151 extern CRITICAL_SECTION mutex;
154 #endif /* __TINC_NET_H__ */