2 net.h -- header for net.c
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2012 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 /* Packet types when using SPTPS */
88 #define PKT_COMPRESSED 1
92 typedef enum packet_type_t {
98 typedef struct listen_socket_t {
109 typedef struct outgoing_t {
112 splay_tree_t *config_tree;
113 struct config_t *cfg;
115 struct addrinfo *aip;
119 extern list_t *outgoing_list;
121 extern int maxoutbufsize;
122 extern int seconds_till_retry;
123 extern int addressfamily;
124 extern unsigned replaywin;
125 extern bool localdiscovery;
127 extern listen_socket_t listen_socket[MAXSOCKETS];
128 extern int listen_sockets;
129 extern int keylifetime;
130 extern int udp_rcvbuf;
131 extern int udp_sndbuf;
132 extern bool do_prune;
134 extern int contradicting_add_edge;
135 extern int contradicting_del_edge;
136 extern time_t last_config_check;
138 extern char *proxyhost;
139 extern char *proxyport;
140 extern char *proxyuser;
141 extern char *proxypass;
142 typedef enum proxytype_t {
150 extern proxytype_t proxytype;
152 extern char *scriptinterpreter;
153 extern char *scriptextension;
155 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
156 #include "connection.h"
159 extern void retry_outgoing(outgoing_t *);
160 extern void handle_incoming_vpn_data(int, short, void *);
161 extern void finish_connecting(struct connection_t *);
162 extern bool do_outgoing_connection(struct outgoing_t *);
163 extern void handle_new_meta_connection(int, short, void *);
164 extern int setup_listen_socket(const sockaddr_t *);
165 extern int setup_vpn_in_socket(const sockaddr_t *);
166 extern bool send_sptps_data(void *handle, uint8_t type, const char *data, size_t len);
167 extern bool receive_sptps_record(void *handle, uint8_t type, const char *data, uint16_t len);
168 extern void send_packet(struct node_t *, vpn_packet_t *);
169 extern void receive_tcppacket(struct connection_t *, const char *, int);
170 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
171 extern char *get_name(void);
172 extern bool setup_myself_reloadable(void);
173 extern bool setup_network(void);
174 extern void setup_outgoing_connection(struct outgoing_t *);
175 extern void try_outgoing_connections(void);
176 extern void close_network_connections(void);
177 extern int main_loop(void);
178 extern void terminate_connection(struct connection_t *, bool);
179 extern bool node_read_ecdsa_public_key(struct node_t *);
180 extern bool read_ecdsa_public_key(struct connection_t *);
181 extern bool read_rsa_public_key(struct connection_t *);
182 extern void send_mtu_probe(struct node_t *);
183 extern void handle_device_data(int, short, void *);
184 extern void handle_meta_connection_data(int, short, void *);
185 extern void regenerate_key(void);
186 extern void purge(void);
187 extern void retry(void);
188 extern int reload_configuration(void);
189 extern void load_all_subnets(void);
192 #define closesocket(s) close(s)
194 extern CRITICAL_SECTION mutex;
197 #endif /* __TINC_NET_H__ */