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netcat_core.h
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netcat_core.h
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/* *********************************************************************** *
* Filename: netcat_core.h
*
* Description: define options struct & declare global variables
*
* Version: 1.0
* Created: Wednesday 06 March 2013 01:31:03 IST
* Revision: none
* Compiler: gcc
*
* Author: Prakash Gamit (09211014), <prakashgamit23@gmail.com>
* Organization: Indian Institute of Technology, Roorkee
*
* ********************************************************************** */
#ifndef _NETCAT_CORE_H_
#define _NETCAT_CORE_H_
/* include standar header files */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netinet/in.h>
// remove warnings for inet_aton and other similar functions
#include <arpa/inet.h>
#define MAX 1024
struct options{
/* host to connect to in case of client mode */
char *target;
/* source port to use */
unsigned short port;
/* is it listen mode or client mode */
int listen;
/* accept multiple connections in listen mode */
int keepopen;
/* socket is udp */
int udp;
/* should be verbose */
int verbose;
/* command is to be executed */
int execcommand;
/* command to execute */
char *command;
};
/* global options struct */
extern struct options o;
/* initialize options struct to default values */
extern void init_options(void);
/* print error message to @stderr and exit */
extern void bye(const char *, ...);
/* writes error message using perror and then quits */
extern void die(char *);
#endif