2 net.h -- header for net.c
3 Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #ifndef __TINC_NET_H__
21 #define __TINC_NET_H__
27 #ifdef ENABLE_JUMBOGRAMS
28 #define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
30 #define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
33 /* MAXSIZE is the maximum size of an encapsulated packet: MTU + seqno + padding + HMAC + compressor overhead */
34 #define MAXSIZE (MTU + 4 + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20)
36 /* MAXBUFSIZE is the maximum size of a request: enough for a MAXSIZEd packet or a 8192 bits RSA key */
37 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128)
39 #define MAXSOCKETS 8 /* Probably overkill... */
41 typedef short length_t;
43 #define AF_UNKNOWN 255
45 struct sockaddr_unknown {
53 typedef union sockaddr_t {
55 struct sockaddr_in in;
56 struct sockaddr_in6 in6;
57 struct sockaddr_unknown unknown;
58 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
59 struct sockaddr_storage storage;
64 #define SALEN(s) SA_LEN(&s)
66 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
69 typedef struct vpn_packet_t {
74 length_t len; /* the actual number of bytes in the `data' field */
75 uint8_t data[MAXSIZE];
78 /* Packet types when using SPTPS */
80 #define PKT_COMPRESSED 1
83 typedef enum packet_type_t {
89 typedef struct listen_socket_t {
99 typedef struct outgoing_t {
102 splay_tree_t *config_tree;
103 struct config_t *cfg;
105 struct addrinfo *aip;
109 extern list_t *outgoing_list;
111 extern int maxoutbufsize;
112 extern int seconds_till_retry;
113 extern int addressfamily;
114 extern unsigned replaywin;
115 extern bool localdiscovery;
116 extern sockaddr_t localdiscovery_address;
118 extern listen_socket_t listen_socket[MAXSOCKETS];
119 extern int listen_sockets;
120 extern int keylifetime;
121 extern int max_connection_burst;
122 extern bool do_prune;
124 extern int autoconnect;
125 extern bool disablebuggypeers;
126 extern int contradicting_add_edge;
127 extern int contradicting_del_edge;
128 extern time_t last_config_check;
130 extern char *proxyhost;
131 extern char *proxyport;
132 extern char *proxyuser;
133 extern char *proxypass;
134 typedef enum proxytype_t {
142 extern proxytype_t proxytype;
144 extern char *scriptinterpreter;
145 extern char *scriptextension;
147 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
148 #include "connection.h"
151 extern void retry_outgoing(outgoing_t *);
152 extern void handle_incoming_vpn_data(void *, int);
153 extern void finish_connecting(struct connection_t *);
154 extern bool do_outgoing_connection(struct outgoing_t *);
155 extern void handle_new_meta_connection(void *, int);
156 extern int setup_listen_socket(const sockaddr_t *);
157 extern int setup_vpn_in_socket(const sockaddr_t *);
158 extern bool send_sptps_data(void *handle, uint8_t type, const char *data, size_t len);
159 extern bool receive_sptps_record(void *handle, uint8_t type, const char *data, uint16_t len);
160 extern void send_packet(struct node_t *, vpn_packet_t *);
161 extern void receive_tcppacket(struct connection_t *, const char *, int);
162 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
163 extern char *get_name(void);
164 extern bool setup_myself_reloadable(void);
165 extern bool setup_network(void);
166 extern void setup_outgoing_connection(struct outgoing_t *);
167 extern void try_outgoing_connections(void);
168 extern void close_network_connections(void);
169 extern int main_loop(void);
170 extern void terminate_connection(struct connection_t *, bool);
171 extern bool node_read_ecdsa_public_key(struct node_t *);
172 extern bool read_ecdsa_public_key(struct connection_t *);
173 extern void send_mtu_probe(struct node_t *);
174 extern void handle_device_data(void *, int);
175 extern void handle_meta_connection_data(struct connection_t *);
176 extern void regenerate_key(void);
177 extern void purge(void);
178 extern void retry(void);
179 extern int reload_configuration(void);
180 extern void load_all_subnets(void);
181 extern void load_all_nodes(void);
184 #define closesocket(s) close(s)
186 extern CRITICAL_SECTION mutex;
189 //TODO: move this to a better place
190 extern char *confbase;
192 #endif /* __TINC_NET_H__ */