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 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 /* Packet types when using SPTPS */
90 #define PKT_COMPRESSED 1
94 typedef enum packet_type_t {
100 typedef struct listen_socket_t {
110 typedef struct outgoing_t {
113 splay_tree_t *config_tree;
114 struct config_t *cfg;
116 struct addrinfo *aip;
120 extern list_t *outgoing_list;
122 extern int maxoutbufsize;
123 extern int seconds_till_retry;
124 extern int addressfamily;
125 extern unsigned replaywin;
126 extern bool localdiscovery;
127 extern sockaddr_t localdiscovery_address;
129 extern listen_socket_t listen_socket[MAXSOCKETS];
130 extern int listen_sockets;
131 extern int keylifetime;
132 extern int max_connection_burst;
133 extern bool do_prune;
135 extern int autoconnect;
136 extern bool disablebuggypeers;
137 extern int contradicting_add_edge;
138 extern int contradicting_del_edge;
139 extern time_t last_config_check;
141 extern char *proxyhost;
142 extern char *proxyport;
143 extern char *proxyuser;
144 extern char *proxypass;
145 typedef enum proxytype_t {
153 extern proxytype_t proxytype;
155 extern char *scriptinterpreter;
156 extern char *scriptextension;
158 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
159 #include "connection.h"
162 extern void retry_outgoing(outgoing_t *);
163 extern void handle_incoming_vpn_data(void *, int);
164 extern void finish_connecting(struct connection_t *);
165 extern bool do_outgoing_connection(struct outgoing_t *);
166 extern void handle_new_meta_connection(void *, int);
167 extern int setup_listen_socket(const sockaddr_t *);
168 extern int setup_vpn_in_socket(const sockaddr_t *);
169 extern bool send_sptps_data(void *handle, uint8_t type, const char *data, size_t len);
170 extern bool receive_sptps_record(void *handle, uint8_t type, const char *data, uint16_t len);
171 extern void send_packet(struct node_t *, vpn_packet_t *);
172 extern void receive_tcppacket(struct connection_t *, const char *, int);
173 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
174 extern char *get_name(void);
175 extern bool setup_myself_reloadable(void);
176 extern bool setup_network(void);
177 extern void setup_outgoing_connection(struct outgoing_t *);
178 extern void try_outgoing_connections(void);
179 extern void close_network_connections(void);
180 extern int main_loop(void);
181 extern void terminate_connection(struct connection_t *, bool);
182 extern bool node_read_ecdsa_public_key(struct node_t *);
183 extern bool read_ecdsa_public_key(struct connection_t *);
184 extern void send_mtu_probe(struct node_t *);
185 extern void handle_device_data(void *, int);
186 extern void handle_meta_connection_data(struct connection_t *);
187 extern void regenerate_key(void);
188 extern void purge(void);
189 extern void retry(void);
190 extern int reload_configuration(void);
191 extern void load_all_subnets(void);
192 extern void load_all_nodes(void);
195 #define closesocket(s) close(s)
197 extern CRITICAL_SECTION mutex;
200 //TODO: move this to a better place
201 extern char *confbase;
203 #endif /* __TINC_NET_H__ */