ncat.h

/***************************************************************************
 * util.h                                                                  *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2020 Insecure.Com LLC ("The Nmap  *
 * Project"). Nmap is also a registered trademark of the Nmap Project.     *
 *                                                                         *
 * This program is distributed under the terms of the Nmap Public Source   *
 * License (NPSL). The exact license text applying to a particular Nmap    *
 * release or source code control revision is contained in the LICENSE     *
 * file distributed with that version of Nmap or source code control       *
 * revision. More Nmap copyright/legal information is available from       *
 * https://nmap.org/book/man-legal.html, and further information on the    *
 * NPSL license itself can be found at https://nmap.org/npsl. This header  *
 * summarizes some key points from the Nmap license, but is no substitute  *
 * for the actual license text.                                            *
 *                                                                         *
 * Nmap is generally free for end users to download and use themselves,    *
 * including commercial use. It is available from https://nmap.org.        *
 *                                                                         *
 * The Nmap license generally prohibits companies from using and           *
 * redistributing Nmap in commercial products, but we sell a special Nmap  *
 * OEM Edition with a more permissive license and special features for     *
 * this purpose. See https://nmap.org/oem                                  *
 *                                                                         *
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 * stating terms other than these (such as an Nmap OEM license), you may   *
 * choose to use and redistribute Nmap under those terms instead.          *
 *                                                                         *
 * The official Nmap Windows builds include the Npcap software             *
 * (https://npcap.org) for packet capture and transmission. It is under    *
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 * redistributed without special permission (such as an Nmap OEM           *
 * license).                                                               *
 *                                                                         *
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 *                                                                         *
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 * problems for other Free Software projects (such as KDE and NASM).       *
 *                                                                         *
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 * Npcap OEM program--see https://nmap.org/oem.                            *
 *                                                                         *
 ***************************************************************************/

 /* $Id$ */

#ifndef UTIL_H_
#define UTIL_H_

#include "ncat_config.h"

//#include "nbase.h"
//#ifndef WIN32
//#include <sys/types.h>
//#include <netinet/in.h>
//#endif

#if HAVE_SYS_UN_H
#include <sys/un.h>
#endif


/* add/multiply unsigned values safely */
//size_t sadd(size_t, size_t);
//size_t smul(size_t, size_t);

#ifdef WIN32
void windows_init();
#endif

#include "sockaddr_u.h"

//void loguser(const char* fmt, ...)
//__attribute__((format(printf, 1, 2)));
//void loguser_noprefix(const char* fmt, ...)
//__attribute__((format(printf, 1, 2)));
//void logdebug(const char* fmt, ...)
//__attribute__((format(printf, 1, 2)));
//void logtest(const char* fmt, ...)
//__attribute__((format(printf, 1, 2)));

/* handle errors */

#define ncat_assert(expr) \
do { \
        if (!(expr)) \
                bye("assertion failed: %s", #expr); \
} while (0)

void die(char*);

//NORETURN void bye(const char*, ...)
//__attribute__((format(printf, 1, 2)));

/* zero out some memory, bzero() is deprecated */
void zmem(void*, size_t);

int strbuf_append(char** buf, size_t* size, size_t* offset, const char* s, size_t n);

int strbuf_append_str(char** buf, size_t* size, size_t* offset, const char* s);

//int strbuf_sprintf(char** buf, size_t* size, size_t* offset, const char* fmt, ...)
//__attribute__((format(printf, 4, 5)));

int addr_is_local(const union sockaddr_u* su);

const char* inet_socktop(const union sockaddr_u* su);

unsigned short inet_port(const union sockaddr_u* su);

int do_listen(int, int, const union sockaddr_u*);


int do_connect(int);

unsigned char* buildsrcrte(struct in_addr dstaddr, struct in_addr routes[],
    int numroutes, int ptr, size_t* len);

int allow_access(const union sockaddr_u* su);

//void ms_to_timeval(struct timeval* tv, long ms)
//__attribute__((nonnull));

struct fdinfo {
    int fd;
    union sockaddr_u remoteaddr;
};

typedef struct fd_list {
    struct fdinfo* fds;
    int nfds, maxfds, fdmax;
} fd_list_t;

int add_fdinfo(fd_list_t*, struct fdinfo*);
int add_fd(fd_list_t* fdl, int fd);
int rm_fd(fd_list_t*, int);
void free_fdlist(fd_list_t*);
void init_fdlist(fd_list_t*, int);
int get_maxfd(fd_list_t*);
struct fdinfo* get_fdinfo(const fd_list_t*, int);

int fix_line_endings(char* src, int* len, char** dst, int* state);

unsigned char* next_protos_parse(size_t* outlen, const char* in);

#endif