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;
60 typedef uint32_t seqno_t;
62 #define AF_UNKNOWN 255
64 struct sockaddr_unknown {
72 typedef union sockaddr_t {
74 struct sockaddr_in in;
75 struct sockaddr_in6 in6;
76 struct sockaddr_unknown unknown;
77 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE
78 struct sockaddr_storage storage;
83 #define SALEN(s) SA_LEN(&s)
85 #define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
88 #define SEQNO(x) ((x)->data + (x)->offset - 4)
89 #define SRCID(x) ((node_id_t *)((x)->data + (x)->offset - 6))
90 #define DSTID(x) ((node_id_t *)((x)->data + (x)->offset - 12))
91 #define DATA(x) ((x)->data + (x)->offset)
92 #define DEFAULT_PACKET_OFFSET 12
94 typedef struct vpn_packet_t {
95 length_t len; /* The actual number of valid bytes in the `data' field (including seqno or dstid/srcid) */
96 length_t offset; /* Offset in the buffer where the packet data starts (righter after seqno or dstid/srcid) */
97 int priority; /* priority or TOS */
98 uint8_t data[MAXSIZE];
101 /* Packet types when using SPTPS */
103 #define PKT_COMPRESSED 1
107 typedef enum packet_type_t {
113 typedef struct listen_socket_t {
123 typedef struct outgoing_t {
126 splay_tree_t *config_tree;
127 struct config_t *cfg;
129 struct addrinfo *aip;
133 extern list_t *outgoing_list;
135 extern int maxoutbufsize;
136 extern int seconds_till_retry;
137 extern int addressfamily;
138 extern unsigned replaywin;
139 extern bool localdiscovery;
141 extern listen_socket_t listen_socket[MAXSOCKETS];
142 extern int listen_sockets;
143 extern io_t unix_socket;
144 extern int keylifetime;
145 extern int udp_rcvbuf;
146 extern int udp_sndbuf;
147 extern int max_connection_burst;
148 extern bool do_prune;
150 extern bool device_standby;
151 extern bool autoconnect;
152 extern bool disablebuggypeers;
153 extern int contradicting_add_edge;
154 extern int contradicting_del_edge;
155 extern time_t last_config_check;
157 extern char *proxyhost;
158 extern char *proxyport;
159 extern char *proxyuser;
160 extern char *proxypass;
161 typedef enum proxytype_t {
169 extern proxytype_t proxytype;
171 extern char *scriptinterpreter;
172 extern char *scriptextension;
174 /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
175 #include "connection.h"
178 extern void retry_outgoing(outgoing_t *);
179 extern void handle_incoming_vpn_data(void *, int);
180 extern void finish_connecting(struct connection_t *);
181 extern bool do_outgoing_connection(struct outgoing_t *);
182 extern void handle_new_meta_connection(void *, int);
183 extern void handle_new_unix_connection(void *, int);
184 extern int setup_listen_socket(const sockaddr_t *);
185 extern int setup_vpn_in_socket(const sockaddr_t *);
186 extern bool send_sptps_data(void *handle, uint8_t type, const void *data, size_t len);
187 extern bool receive_sptps_record(void *handle, uint8_t type, const void *data, uint16_t len);
188 extern void send_packet(struct node_t *, vpn_packet_t *);
189 extern void receive_tcppacket(struct connection_t *, const char *, int);
190 extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
191 extern char *get_name(void);
192 extern void device_enable(void);
193 extern void device_disable(void);
194 extern bool setup_myself_reloadable(void);
195 extern bool setup_network(void);
196 extern void setup_outgoing_connection(struct outgoing_t *);
197 extern void try_outgoing_connections(void);
198 extern void close_network_connections(void);
199 extern int main_loop(void);
200 extern void terminate_connection(struct connection_t *, bool);
201 extern bool node_read_ecdsa_public_key(struct node_t *);
202 extern bool read_ecdsa_public_key(struct connection_t *);
203 extern bool read_rsa_public_key(struct connection_t *);
204 extern void send_mtu_probe(struct node_t *);
205 extern void handle_device_data(void *, int);
206 extern void handle_meta_connection_data(struct connection_t *);
207 extern void regenerate_key(void);
208 extern void purge(void);
209 extern void retry(void);
210 extern int reload_configuration(void);
211 extern void load_all_subnets(void);
212 extern void load_all_nodes(void);
215 #define closesocket(s) close(s)
218 #endif /* __TINC_NET_H__ */