tinc/src/net.h

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/*
net.h -- header for net.c
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Copyright (C) 1998-2005 Ivo Timmermans
2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
#ifndef __TINC_NET_H__
#define __TINC_NET_H__
#include <openssl/evp.h>
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#include "ipv6.h"
#ifdef ENABLE_JUMBOGRAMS
#define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
#else
#define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
#endif
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#define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
#define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */
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#define MAXSOCKETS 128 /* Overkill... */
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typedef struct mac_t {
uint8_t x[6];
} mac_t;
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typedef struct ipv4_t {
uint8_t x[4];
} ipv4_t;
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typedef struct ipv6_t {
uint16_t x[8];
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} ipv6_t;
typedef short length_t;
#define AF_UNKNOWN 255
struct sockaddr_unknown {
uint16_t family;
uint16_t pad1;
uint32_t pad2;
char *address;
char *port;
};
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typedef union sockaddr_t {
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struct sockaddr sa;
struct sockaddr_in in;
struct sockaddr_in6 in6;
struct sockaddr_unknown unknown;
#ifdef HAVE_STRUCT_SOCKADDR_STORAGE
struct sockaddr_storage storage;
#endif
} sockaddr_t;
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#ifdef SA_LEN
#define SALEN(s) SA_LEN(&s)
#else
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#define SALEN(s) (s.sa_family==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))
#endif
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typedef struct vpn_packet_t {
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length_t len; /* the actual number of bytes in the `data' field */
int priority; /* priority or TOS */
uint32_t seqno; /* 32 bits sequence number (network byte order of course) */
uint8_t data[MAXSIZE];
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} vpn_packet_t;
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typedef struct listen_socket_t {
int tcp;
int udp;
sockaddr_t sa;
} listen_socket_t;
#include "conf.h"
#include "list.h"
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typedef struct outgoing_t {
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char *name;
int timeout;
struct config_t *cfg;
struct addrinfo *ai;
struct addrinfo *aip;
struct event *event;
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} outgoing_t;
extern list_t *outgoing_list;
extern int maxoutbufsize;
extern int seconds_till_retry;
extern int addressfamily;
extern listen_socket_t listen_socket[MAXSOCKETS];
extern int listen_sockets;
extern int keyexpires;
extern int keylifetime;
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extern bool do_prune;
extern bool do_purge;
extern char *myport;
extern time_t now;
extern int contradicting_add_edge;
extern int contradicting_del_edge;
/* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
#include "connection.h"
#include "node.h"
extern void retry_outgoing(outgoing_t *);
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extern void handle_incoming_vpn_data(int);
extern void finish_connecting(struct connection_t *);
extern void do_outgoing_connection(struct connection_t *);
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extern bool handle_new_meta_connection(int);
extern int setup_listen_socket(const sockaddr_t *);
extern int setup_vpn_in_socket(const sockaddr_t *);
extern void send_packet(const struct node_t *, vpn_packet_t *);
extern void receive_tcppacket(struct connection_t *, char *, int);
extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
extern bool setup_network(void);
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extern void setup_outgoing_connection(struct outgoing_t *);
extern void try_outgoing_connections(void);
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extern void close_network_connections(void);
extern int main_loop(void);
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extern void terminate_connection(struct connection_t *, bool);
extern void flush_queue(struct node_t *);
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extern bool read_rsa_public_key(struct connection_t *);
extern void send_mtu_probe(struct node_t *);
extern void load_all_subnets();
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#ifndef HAVE_MINGW
#define closesocket(s) close(s)
#else
extern CRITICAL_SECTION mutex;
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#endif
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#endif /* __TINC_NET_H__ */