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n2n.h
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/*
* (C) 2007-09 - Luca Deri <[email protected]>
* Richard Andrews <[email protected]>
*
* 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 3 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, see <http://www.gnu.org/licenses/>
*
* Code contributions courtesy of:
* Babak Farrokhi <[email protected]> [FreeBSD port]
* Lukasz Taczuk
*
*/
#ifndef _N2N_H_
#define _N2N_H_
/*
tunctl -t tun0
tunctl -t tun1
ifconfig tun0 1.2.3.4 up
ifconfig tun1 1.2.3.5 up
./edge -d tun0 -l 2000 -r 127.0.0.1:3000 -c hello
./edge -d tun1 -l 3000 -r 127.0.0.1:2000 -c hello
tunctl -u UID -t tunX
*/
#if defined(__APPLE__) && defined(__MACH__)
#define _DARWIN_
#endif
/* Some capability defaults which can be reset for particular platforms. */
#define N2N_HAVE_DAEMON 1
#define N2N_HAVE_SETUID 1
/* #define N2N_CAN_NAME_IFACE */
/* Moved here to define _CRT_SECURE_NO_WARNINGS before all the including takes place */
#ifdef WIN32
#include "win32/n2n_win32.h"
#undef N2N_HAVE_DAEMON
#undef N2N_HAVE_SETUID
#endif
#include <time.h>
#include <ctype.h>
#include <stdlib.h>
#ifndef WIN32
#include <netdb.h>
#endif
#ifndef _MSC_VER
#include <getopt.h>
#endif /* #ifndef _MSC_VER */
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#ifndef WIN32
//#include <unistd.h>
//#include <sys/ioctl.h>
//#include <sys/socket.h>
//#include <sys/param.h>
#include <pthread.h>
#ifdef __linux__
#include <linux/if.h>
#include <linux/if_tun.h>
#define N2N_CAN_NAME_IFACE 1
#endif /* #ifdef __linux__ */
#ifdef __FreeBSD__
#include <netinet/in_systm.h>
#endif /* #ifdef __FreeBSD__ */
#include <syslog.h>
#include <sys/wait.h>
/*#define ETH_ADDR_LEN 6
struct ether_hdr
{
uint8_t dhost[ETH_ADDR_LEN];
uint8_t shost[ETH_ADDR_LEN];
uint16_t type; higher layer protocol encapsulated
} __attribute__ ((__packed__));*/
//typedef struct ether_hdr ether_hdr_t;
#ifdef __sun__
#include <sys/sysmacros.h> /* MIN() and MAX() declared here */
#undef N2N_HAVE_DAEMON
#endif /* #ifdef __sun__ */
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <signal.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <unistd.h>
#define closesocket(a) close(a)
#endif /* #ifndef WIN32 */
#include <string.h>
#include <stdarg.h>
#ifdef WIN32
#include "win32/wintap.h"
#endif /* #ifdef WIN32 */
#include "n2n_list.h"
#include "n2n_wire.h"
/* N2N_IFNAMSIZ is needed on win32 even if dev_name is not used after declaration */
#define N2N_IFNAMSIZ 16 /* 15 chars * NULL */
#ifndef WIN32
typedef struct tuntap_dev {
int fd;
uint8_t mac_addr[6];
uint32_t ip_addr, device_mask;
uint16_t mtu;
char dev_name[N2N_IFNAMSIZ];
} tuntap_dev;
#endif /* #ifndef WIN32 */
#define QUICKLZ 1
/* N2N packet header indicators. */
#define MSG_TYPE_REGISTER 1
#define MSG_TYPE_DEREGISTER 2
#define MSG_TYPE_PACKET 3
#define MSG_TYPE_REGISTER_ACK 4
#define MSG_TYPE_REGISTER_SUPER 5
#define MSG_TYPE_REGISTER_SUPER_ACK 6
#define MSG_TYPE_REGISTER_SUPER_NAK 7
#define MSG_TYPE_FEDERATION 8
/* Set N2N_COMPRESSION_ENABLED to 0 to disable lzo1x compression of ethernet
* frames. Doing this will break compatibility with the standard n2n packet
* format so do it only for experimentation. All edges must be built with the
* same value if they are to understand each other. */
#define N2N_COMPRESSION_ENABLED 1
struct peer_info {
struct n2n_list list;
n2n_community_t community_name;
n2n_mac_t mac_addr;
n2n_sock_t sock;
time_t last_seen;
};
struct n2n_edge; /* defined in edge.c */
typedef struct n2n_edge n2n_edge_t;
/* ************************************** */
#define TRACE_ERROR 0, __FILE__, __LINE__
#define TRACE_WARNING 1, __FILE__, __LINE__
#define TRACE_NORMAL 2, __FILE__, __LINE__
#define TRACE_INFO 3, __FILE__, __LINE__
#define TRACE_DEBUG 4, __FILE__, __LINE__
/* ************************************** */
#define traceError(...) traceEvent(TRACE_ERROR, __VA_ARGS__)
#define traceWarning(...) traceEvent(TRACE_WARNING, __VA_ARGS__)
#define traceNormal(...) traceEvent(TRACE_NORMAL, __VA_ARGS__)
#define traceInfo(...) traceEvent(TRACE_INFO, __VA_ARGS__)
#define traceDebug(...) traceEvent(TRACE_DEBUG, __VA_ARGS__)
/* ************************************** */
#define SUPERNODE_IP "127.0.0.1"
#define SUPERNODE_PORT 1234
/* ************************************** */
#ifndef max
#define max(a, b) ((a < b) ? b : a)
#endif
#ifndef min
#define min(a, b) ((a > b) ? b : a)
#endif
/* ************************************** */
/* Variables */
/* extern TWOFISH *tf; */
extern int traceLevel;
extern int useSyslog;
/* Functions */
extern void traceEvent(int eventTraceLevel, char *file, int line, char *format, ...);
extern int tuntap_open(tuntap_dev *device, char *dev, const char *address_mode, char *device_ip,
char *device_mask, const char *device_mac, int mtu);
extern int tuntap_read(struct tuntap_dev *tuntap, unsigned char *buf, int len);
extern int tuntap_write(struct tuntap_dev *tuntap, unsigned char *buf, int len);
extern void tuntap_close(struct tuntap_dev *tuntap);
extern void tuntap_get_address(struct tuntap_dev *tuntap);
extern char *msg_type2str(uint16_t msg_type);
extern void hexdump(const uint8_t *buf, size_t len);
void print_n2n_version();
/* Operations on peer_info lists. */
struct peer_info *find_peer_by_mac(struct n2n_list *list,
const n2n_mac_t mac);
void peer_list_add(struct n2n_list *list,
struct peer_info *new);
size_t purge_peer_list(struct n2n_list *peer_list,
time_t purge_before);
size_t purge_expired_registrations(struct n2n_list *peer_list);
/* version.c */
extern char *n2n_sw_version, *n2n_sw_osName, *n2n_sw_buildDate;
#endif /* _N2N_H_ */