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n2n/include/n2n.h
Hamish Coleman 21ac30c121 Use the correct modern windows sockets header 
As suggested in a PR from @Legend-Master (this change is basically
unrelated to the main point of his PR, so extracted here)

Windows is a confusing and disappointing development environment.  They
completely replaced all the definitions in winsock.h with exact
equivalents in winsock2.h (except for a small number of deprecated
functions).

However they didnt make them mutually exclusive - so if you include
both, you get errors.  They also automatically include winsock.h from
windows.h, so you must remember to include winsock2.h first.  They also
didnt just remove winsock.h and replace it with the new contents.

(Probably in the name of "compatibility", whilst swearing that the new
winsock is the same as the old one - because if you cannot believe two
inconsistent things simultaneously, you shouldnt be a windows
programmer)

All these things are totally nuts.  Thanks, windows dev environment,
for not noticing that this is nuts
2023-06-25 02:46:03 +08:00

227 lines
8.1 KiB
C
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/**
* (C) 2007-22 - ntop.org and contributors
*
* 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 see <http://www.gnu.org/licenses/>
*
*/
#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
*/
#define SN_MANUAL_MAC /* allows supernode MAC address to be set manually */
#define N2N_HAVE_DAEMON /* needs to be defined before it gets undefined */
#define N2N_HAVE_TCP /* needs to be defined before it gets undefined */
#define HAVE_BRIDGING_SUPPORT
/* #define N2N_CAN_NAME_IFACE */
#include "config.h" /* Visual C++ */
/* Moved here to define _CRT_SECURE_NO_WARNINGS before all the including takes place */
#ifdef WIN32
#define N2N_CAN_NAME_IFACE 1
#undef N2N_HAVE_DAEMON
#undef N2N_HAVE_TCP /* as explained on https://github.com/ntop/n2n/pull/627#issuecomment-782093706 */
#undef N2N_HAVE_SETUID
#endif /* WIN32 */
#include <stdbool.h>
#include <stdio.h> // for size_t, FILE
#include "n2n_define.h"
#include "n2n_typedefs.h"
#ifdef WIN32
#include <winsock2.h> /* for tcp */
#include <lmaccess.h> /* for privilege check in tools/n2n-route */
#include <lmapibuf.h> /* for privilege check in tools/n2n-route */
#include <sys/stat.h>
#include <windows.h> /* for privilege check in tools/n2n-route */
#include "wintap.h"
#define SHUT_RDWR SD_BOTH /* for tcp */
#endif /* #ifdef WIN32 */
#ifndef WIN32
#include <netinet/in.h> // for in_addr (ptr only), in_addr_t
#include <pwd.h>
#include <stdint.h> // for uint8_t, uint64_t, uint32_t, uint16_t
#include <sys/types.h> // for time_t
#include <unistd.h> // for close
#define closesocket(a) close(a)
#ifdef __linux__
#define N2N_CAN_NAME_IFACE 1
#endif /* #ifdef __linux__ */
#ifdef __FreeBSD__
#include <netinet/in_systm.h>
#endif /* #ifdef __FreeBSD__ */
#ifdef HAVE_ZSTD
#include <zstd.h>
#endif
#if defined (HAVE_OPENSSL_1_1)
#include <openssl/opensslv.h>
#include <openssl/crypto.h>
#endif
#endif /* #ifndef WIN32 */
/* ************************************** */
#ifndef TRACE_ERROR
#define TRACE_ERROR 0
#define TRACE_WARNING 1
#define TRACE_NORMAL 2
#define TRACE_INFO 3
#define TRACE_DEBUG 4
#endif
/* ************************************** */
/* Transop Init Functions */
int n2n_transop_null_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
int n2n_transop_tf_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
int n2n_transop_aes_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
int n2n_transop_cc20_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
int n2n_transop_speck_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
int n2n_transop_lzo_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
#ifdef HAVE_ZSTD
int n2n_transop_zstd_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt);
#endif
/* Log */
void setTraceLevel (int level);
void setUseSyslog (int use_syslog);
void setTraceFile (FILE *f);
int getTraceLevel ();
void closeTraceFile ();
void _traceEvent (int eventTraceLevel, char* file, int line, char * format, ...);
#define traceEvent(level, format, ...) _traceEvent(level, __FILE__, __LINE__, format, ##__VA_ARGS__)
/* Tuntap API */
int tuntap_open (struct tuntap_dev *device, char *dev, const char *address_mode, char *device_ip,
char *device_mask, const char * device_mac, int mtu
#ifdef WIN32
, int metric
#endif
);
int tuntap_read (struct tuntap_dev *tuntap, unsigned char *buf, int len);
int tuntap_write (struct tuntap_dev *tuntap, unsigned char *buf, int len);
void tuntap_close (struct tuntap_dev *tuntap);
void tuntap_get_address (struct tuntap_dev *tuntap);
/* Utils */
char* inaddrtoa (ipstr_t out, struct in_addr addr);
char* intoa (uint32_t addr, char* buf, uint16_t buf_len);
uint32_t bitlen2mask (uint8_t bitlen);
uint8_t mask2bitlen (uint32_t mask);
char* macaddr_str (macstr_t buf, const n2n_mac_t mac);
int str2mac (uint8_t * outmac /* 6 bytes */, const char * s);
int supernode2sock (n2n_sock_t * sn, const n2n_sn_name_t addrIn);
uint8_t is_multi_broadcast (const n2n_mac_t dest_mac);
uint8_t is_broadcast (const n2n_mac_t dest_mac);
uint8_t is_null_mac (const n2n_mac_t dest_mac);
char* msg_type2str (uint16_t msg_type);
void hexdump (const uint8_t * buf, size_t len);
void print_n2n_version ();
int is_empty_ip_address (const n2n_sock_t * sock);
void print_edge_stats (const n2n_edge_t *eee);
int memrnd (uint8_t *address, size_t len);
int memxor (uint8_t *destination, const uint8_t *source, size_t len);
/* Sockets */
char* sock_to_cstr (n2n_sock_str_t out,
const n2n_sock_t * sock);
char * ip_subnet_to_str (dec_ip_bit_str_t buf, const n2n_ip_subnet_t *ipaddr);
SOCKET open_socket (int local_port, in_addr_t address, int type);
int sock_equal (const n2n_sock_t * a,
const n2n_sock_t * b);
/* Header encryption */
uint64_t time_stamp (void);
uint64_t initial_time_stamp (void);
int time_stamp_verify_and_update (uint64_t stamp, uint64_t * previous_stamp, int allow_jitter);
/* Operations on peer_info lists. */
size_t purge_peer_list (struct peer_info ** peer_list,
SOCKET socket_not_to_close,
n2n_tcp_connection_t **tcp_connections,
time_t purge_before);
size_t clear_peer_list (struct peer_info ** peer_list);
size_t purge_expired_nodes (struct peer_info **peer_list,
SOCKET socket_not_to_close,
n2n_tcp_connection_t **tcp_connections,
time_t *p_last_purge,
int frequency, int timeout);
/* Edge conf */
void edge_init_conf_defaults (n2n_edge_conf_t *conf);
int edge_verify_conf (const n2n_edge_conf_t *conf);
int edge_conf_add_supernode (n2n_edge_conf_t *conf, const char *ip_and_port);
const n2n_edge_conf_t* edge_get_conf (const n2n_edge_t *eee);
void edge_term_conf (n2n_edge_conf_t *conf);
/* Public functions */
n2n_edge_t* edge_init (const n2n_edge_conf_t *conf, int *rv);
void update_supernode_reg (n2n_edge_t * eee, time_t nowTime);
void readFromIPSocket (n2n_edge_t * eee, int in_sock);
void edge_term (n2n_edge_t *eee);
void edge_set_callbacks (n2n_edge_t *eee, const n2n_edge_callbacks_t *callbacks);
void edge_set_userdata (n2n_edge_t *eee, void *user_data);
void* edge_get_userdata (n2n_edge_t *eee);
void edge_send_packet2net (n2n_edge_t *eee, uint8_t *tap_pkt, size_t len);
void edge_read_from_tap (n2n_edge_t *eee);
int edge_get_n2n_socket (n2n_edge_t *eee);
int edge_get_management_socket (n2n_edge_t *eee);
int run_edge_loop (n2n_edge_t *eee);
int quick_edge_init (char *device_name, char *community_name,
char *encrypt_key, char *device_mac,
char *local_ip_address,
char *supernode_ip_address_port,
bool *keep_on_running);
int comm_init (struct sn_community *comm, char *cmn);
int sn_init_defaults (n2n_sn_t *sss);
void sn_init (n2n_sn_t *sss);
void sn_term (n2n_sn_t *sss);
int supernode2sock (n2n_sock_t * sn, const n2n_sn_name_t addrIn);
struct peer_info* add_sn_to_list_by_mac_or_sock (struct peer_info **sn_list, n2n_sock_t *sock, const n2n_mac_t mac, int *skip_add);
int run_sn_loop (n2n_sn_t *sss);
int assign_one_ip_subnet (n2n_sn_t *sss, struct sn_community *comm);
const char* compression_str (uint8_t cmpr);
const char* transop_str (enum n2n_transform tr);
void readFromMgmtSocket (n2n_edge_t *eee);
void mgmt_event_post (enum n2n_event_topic topic, int data0, void *data1);
#endif /* _N2N_H_ */
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