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__
30 #ifdef ENABLE_JUMBOGRAMS
31 #define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
33 #define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
36 #define MAXSIZE (MTU + 4 + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_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 8 /* Probably overkill... */
41 typedef struct mac_t {
45 typedef struct ipv4_t {
49 typedef struct ipv6_t {
53 typedef short length_t;
55 #define AF_UNKNOWN 255
57 struct sockaddr_unknown {
65 typedef union sockaddr_t {
67 struct sockaddr_in in;
68 struct sockaddr_in6 in6;
69 struct sockaddr_unknown unknown;
70 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
71 struct sockaddr_storage storage;
76 #define SALEN(s) SA_LEN(&s)
78 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
81 typedef struct vpn_packet_t {
82 length_t len; /* the actual number of bytes in the `data' field */
83 int priority; /* priority or TOS */
84 uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
85 uint8_t data[MAXSIZE];
88 typedef struct listen_socket_t {
99 typedef struct outgoing_t {
102 struct config_t *cfg;
104 struct addrinfo *aip;
108 extern list_t *outgoing_list;
110 extern int maxoutbufsize;
111 extern int seconds_till_retry;
112 extern int addressfamily;
113 extern unsigned replaywin;
115 extern listen_socket_t listen_socket[MAXSOCKETS];
116 extern int listen_sockets;
117 extern int keylifetime;
118 extern int udp_rcvbuf;
119 extern int udp_sndbuf;
120 extern bool do_prune;
122 extern int contradicting_add_edge;
123 extern int contradicting_del_edge;
125 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
126 #include "connection.h"
129 extern void retry_outgoing(outgoing_t *);
130 extern void handle_incoming_vpn_data(void *);
131 extern void finish_connecting(struct connection_t *);
132 extern void do_outgoing_connection(struct connection_t *);
133 extern void handle_new_meta_connection(void *);
134 extern int setup_listen_socket(const sockaddr_t *);
135 extern int setup_vpn_in_socket(const sockaddr_t *);
136 extern void send_packet(const struct node_t *, vpn_packet_t *);
137 extern void receive_tcppacket(struct connection_t *, char *, int);
138 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
139 extern bool setup_network(void);
140 extern void setup_outgoing_connection(struct outgoing_t *);
141 extern void try_outgoing_connections(void);
142 extern void close_network_connections(void);
143 extern int main_loop(void);
144 extern void terminate_connection(struct connection_t *, bool);
145 extern void flush_queue(struct node_t *);
146 extern bool read_rsa_public_key(struct connection_t *);
147 extern void send_mtu_probe(struct node_t *);
148 extern void handle_device_data(int, short, void *);
149 extern void handle_meta_connection_data(void *);
150 extern void regenerate_key();
151 extern void purge(void);
152 extern void retry(void);
153 extern int reload_configuration(void);
154 extern void load_all_subnets();
157 #define closesocket(s) close(s)
160 extern mutex_t mutex;
162 #endif /* __TINC_NET_H__ */