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__
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 /* MAXSIZE is the maximum size of an encapsulated packet: MTU + seqno + padding + HMAC + compressor overhead */
35 #define MAXSIZE (MTU + 4 + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20)
37 /* MAXBUFSIZE is the maximum size of a request: enough for a MAXSIZEd packet or a 8192 bits RSA key */
38 #define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128)
40 #define MAXSOCKETS 8 /* Probably overkill... */
42 typedef struct vpn_packet_t {
47 uint16_t len; /* the actual number of bytes in the `data' field */
48 uint8_t data[MAXSIZE];
51 /* Packet types when using SPTPS */
53 #define PKT_COMPRESSED 1
56 typedef enum packet_type_t {
62 typedef struct listen_socket_t {
72 typedef struct outgoing_t {
75 struct splay_tree_t *config_tree;
82 extern int maxoutbufsize;
83 extern int addressfamily;
84 extern unsigned replaywin;
86 extern listen_socket_t listen_socket[MAXSOCKETS];
87 extern int listen_sockets;
88 extern int keylifetime;
89 extern int max_connection_burst;
91 extern int autoconnect;
93 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
94 #include "connection.h"
97 extern void retry_outgoing(outgoing_t *);
98 extern void handle_incoming_vpn_data(void *, int);
99 extern void finish_connecting(struct connection_t *);
100 extern bool do_outgoing_connection(struct outgoing_t *);
101 extern void handle_new_meta_connection(void *, int);
102 extern int setup_listen_socket(const sockaddr_t *);
103 extern int setup_vpn_in_socket(const sockaddr_t *);
104 extern bool send_sptps_data(void *handle, uint8_t type, const char *data, size_t len);
105 extern bool receive_sptps_record(void *handle, uint8_t type, const char *data, uint16_t len);
106 extern void send_packet(struct node_t *, struct vpn_packet_t *);
107 extern void receive_tcppacket(struct connection_t *, const char *, int);
108 extern void broadcast_packet(const struct node_t *, struct vpn_packet_t *);
109 extern char *get_name(void);
110 extern bool setup_myself_reloadable(void);
111 extern bool setup_network(void);
112 extern void setup_outgoing_connection(struct outgoing_t *);
113 extern void try_outgoing_connections(void);
114 extern void close_network_connections(void);
115 extern int main_loop(void);
116 extern void terminate_connection(struct connection_t *, bool);
117 extern bool node_read_ecdsa_public_key(struct node_t *);
118 extern bool read_ecdsa_public_key(struct connection_t *);
119 extern void send_mtu_probe(struct node_t *);
120 extern void handle_device_data(void *, int);
121 extern void handle_meta_connection_data(struct connection_t *);
122 extern void regenerate_key(void);
123 extern void purge(void);
124 extern void retry(void);
125 extern int reload_configuration(void);
126 extern void load_all_subnets(void);
127 extern void load_all_nodes(void);
130 #define closesocket(s) close(s)
132 extern CRITICAL_SECTION mutex;
135 #endif /* __TINC_NET_H__ */