tinc/src/net.h

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/*
net.h -- header for net.c
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Copyright (C) 1998-2002 Ivo Timmermans <zarq@iname.com>
2000-2002 Guus Sliepen <guus@sliepen.warande.net>
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: net.h,v 1.9.4.44 2002/03/01 12:26:56 guus Exp $
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*/
#ifndef __TINC_NET_H__
#define __TINC_NET_H__
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
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#include <sys/time.h>
#include "config.h"
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#define MTU 1514 /* 1500 bytes payload + 14 bytes ethernet header */
#define MAXSIZE 1600 /* MTU + header (seqno) and trailer (CBC padding and HMAC) */
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#define MAXBUFSIZE 2048 /* Probably way too much, but it must fit every possible request. */
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#define MAXSOCKETS 128 /* Overkill... */
typedef struct mac_t
{
unsigned char x[6];
} mac_t;
typedef struct ipv4_t
{
unsigned char x[4];
} ipv4_t;
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typedef struct ip_mask_t {
ipv4_t address;
ipv4_t mask;
} ip_mask_t;
typedef struct ipv6_t
{
unsigned short x[8];
} ipv6_t;
typedef unsigned short port_t;
typedef short length_t;
typedef union {
struct sockaddr sa;
struct sockaddr_in in;
struct sockaddr_in6 in6;
} 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 {
length_t len; /* the actual number of bytes in the `data' field */
int priority; /* priority or TOS */
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unsigned int seqno; /* 32 bits sequence number (network byte order of course) */
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unsigned char data[MAXSIZE];
} vpn_packet_t;
typedef struct queue_element_t {
void *packet;
struct queue_element_t *prev;
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struct queue_element_t *next;
} queue_element_t;
typedef struct packet_queue_t {
queue_element_t *head;
queue_element_t *tail;
} packet_queue_t;
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typedef struct outgoing_t {
char *name;
int timeout;
struct config_t *cfg;
struct addrinfo *ai;
struct addrinfo *aip;
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} outgoing_t;
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extern int maxtimeout;
extern int seconds_till_retry;
extern int addressfamily;
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extern char *request_name[];
extern char *status_text[];
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#include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
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extern int tcp_socket[MAXSOCKETS];
extern int udp_socket[MAXSOCKETS];
extern int tcp_sockets;
extern int udp_sockets;
extern int keyexpires;
extern int keylifetime;
extern int do_prune;
extern int do_purge;
extern char *myport;
extern void retry_outgoing(outgoing_t *);
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extern void handle_incoming_vpn_data(int);
extern void finish_connecting(connection_t *);
extern void do_outgoing_connection(connection_t *);
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extern int handle_new_meta_connection(int);
extern int setup_listen_socket(sockaddr_t *);
extern int setup_vpn_in_socket(sockaddr_t *);
extern void send_packet(struct node_t *, vpn_packet_t *);
extern void receive_packet(struct node_t *, vpn_packet_t *);
extern void receive_tcppacket(struct connection_t *, char *, int);
extern void broadcast_packet(struct node_t *, vpn_packet_t *);
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extern int setup_network_connections(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 void main_loop(void);
extern void terminate_connection(connection_t *, int);
extern void flush_queue(struct node_t *);
extern int read_rsa_public_key(struct connection_t *);
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#endif /* __TINC_NET_H__ */