#include <stdlib.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <memory.h>

int main(int argc, char **argv)
{
	int result;
	int pid;
	int sock;
	struct sockaddr_in server;

	if(argc!=3)
	{
		fprintf(stdout,"usage: %s <IP> <port>\n",argv[0]);
		fflush(stdout);
		return -1;
	}

	if((sock = socket(AF_INET, SOCK_STREAM, 0))==-1)
	{
		fprintf(stdout,"error occurred while creating socket %d %s\n",errno,strerror(errno));
		fflush(stdout);
		return -1;
	}

	server.sin_family = AF_INET;
	server.sin_port = htons(atoi(argv[2]));
	server.sin_addr.s_addr = inet_addr(argv[1]);
	memset(server.sin_zero, 0, 8);

	fprintf(stdout,"trying to connect... \n");
	fflush(stdout);

	if((result=connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_in)))!=0)
	{
		fprintf(stdout,"error occurred while connecting %d %s \n",errno,strerror(errno));
		fflush(stdout);
		close(sock);
		return -1;
	}
	else
	{	pid=getpid();
		if(send(sock,&pid,sizeof(int),0)<=0)
		{
			fprintf(stdout,"error occurred while sending %d %s\n",errno,strerror(errno));
		}
		else
		{
			fprintf(stdout,"sent %d successfully\n",pid);
		}
	}
	fflush(stdout);
	getchar();
	close(sock);

	return 0;
}