2 net.h -- header for net.c
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2014 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__
29 #ifdef ENABLE_JUMBOGRAMS
30 #define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
32 #define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
35 /* MAXSIZE is the maximum size of an encapsulated packet: MTU + seqno + srcid + dstid + padding + HMAC + compressor overhead */
36 #define MAXSIZE (MTU + 4 + sizeof(node_id_t) + sizeof(node_id_t) + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20)
38 /* MAXBUFSIZE is the maximum size of a request: enough for a MAXSIZEd packet or a 8192 bits RSA key */
39 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128)
41 #define MAXSOCKETS 8 /* Probably overkill... */
43 typedef struct mac_t {
47 typedef struct ipv4_t {
51 typedef struct ipv6_t {
55 typedef struct node_id_t {
59 typedef short length_t;
61 #define AF_UNKNOWN 255
63 struct sockaddr_unknown {
71 typedef union sockaddr_t {
73 struct sockaddr_in in;
74 struct sockaddr_in6 in6;
75 struct sockaddr_unknown unknown;
76 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
77 struct sockaddr_storage storage;
82 #define SALEN(s) SA_LEN(&s)
84 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
87 typedef struct vpn_packet_t {
88 length_t len; /* the actual number of bytes in the `data' field */
89 int priority; /* priority or TOS */
90 uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
91 uint8_t data[MAXSIZE];
94 typedef struct sptps_packet_t {
95 length_t len; /* the actual number of bytes in the `data' field */
96 int priority; /* priority or TOS */
97 node_id_t dstid; /* node ID of the final recipient */
98 node_id_t srcid; /* node ID of the original sender */
102 /* Packet types when using SPTPS */
104 #define PKT_COMPRESSED 1
108 typedef enum packet_type_t {
114 typedef struct listen_socket_t {
124 typedef struct outgoing_t {
127 splay_tree_t *config_tree;
128 struct config_t *cfg;
130 struct addrinfo *aip;
134 extern list_t *outgoing_list;
136 extern int maxoutbufsize;
137 extern int seconds_till_retry;
138 extern int addressfamily;
139 extern unsigned replaywin;
140 extern bool localdiscovery;
142 extern listen_socket_t listen_socket[MAXSOCKETS];
143 extern int listen_sockets;
144 extern io_t unix_socket;
145 extern int keylifetime;
146 extern int udp_rcvbuf;
147 extern int udp_sndbuf;
148 extern int max_connection_burst;
149 extern bool do_prune;
151 extern bool device_standby;
152 extern bool autoconnect;
153 extern bool disablebuggypeers;
154 extern int contradicting_add_edge;
155 extern int contradicting_del_edge;
156 extern time_t last_config_check;
158 extern char *proxyhost;
159 extern char *proxyport;
160 extern char *proxyuser;
161 extern char *proxypass;
162 typedef enum proxytype_t {
170 extern proxytype_t proxytype;
172 extern char *scriptinterpreter;
173 extern char *scriptextension;
175 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
176 #include "connection.h"
179 extern void retry_outgoing(outgoing_t *);
180 extern void handle_incoming_vpn_data(void *, int);
181 extern void finish_connecting(struct connection_t *);
182 extern bool do_outgoing_connection(struct outgoing_t *);
183 extern void handle_new_meta_connection(void *, int);
184 extern void handle_new_unix_connection(void *, int);
185 extern int setup_listen_socket(const sockaddr_t *);
186 extern int setup_vpn_in_socket(const sockaddr_t *);
187 extern bool send_sptps_data(void *handle, uint8_t type, const char *data, size_t len);
188 extern bool receive_sptps_record(void *handle, uint8_t type, const char *data, uint16_t len);
189 extern void send_packet(struct node_t *, vpn_packet_t *);
190 extern void receive_tcppacket(struct connection_t *, const char *, int);
191 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
192 extern char *get_name(void);
193 extern void device_enable(void);
194 extern void device_disable(void);
195 extern bool setup_myself_reloadable(void);
196 extern bool setup_network(void);
197 extern void setup_outgoing_connection(struct outgoing_t *);
198 extern void try_outgoing_connections(void);
199 extern void close_network_connections(void);
200 extern int main_loop(void);
201 extern void terminate_connection(struct connection_t *, bool);
202 extern bool node_read_ecdsa_public_key(struct node_t *);
203 extern bool read_ecdsa_public_key(struct connection_t *);
204 extern bool read_rsa_public_key(struct connection_t *);
205 extern void send_mtu_probe(struct node_t *);
206 extern void handle_device_data(void *, int);
207 extern void handle_meta_connection_data(struct connection_t *);
208 extern void regenerate_key(void);
209 extern void purge(void);
210 extern void retry(void);
211 extern int reload_configuration(void);
212 extern void load_all_subnets(void);
213 extern void load_all_nodes(void);
216 #define closesocket(s) close(s)
219 #endif /* __TINC_NET_H__ */