Anonymous

/*** client*/#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <errno.h>#include <string.h>#include <netdb.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#define PORT 3456 // the port client will be connecting to #define MAXDATASIZE 100 // max number of bytes we can get at once #define STDIN 0int main(int argc, char *argv[]){    int sockfd, numbytes, c, cnt, sendbytes, loop;      char buf[MAXDATASIZE];    struct hostent *he;    struct sockaddr_in their_addr; // connector's address information     fd_set main, temp;    if (argc != 2) 	{        fprintf(stderr,"usage: client hostname\n");        exit(1);    }    if ((he=gethostbyname(argv[1])) == NULL) 	{  // get the host info         herror("gethostbyname");        exit(1);    }    if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) 	{        perror("socket");        exit(1);    }    their_addr.sin_family = AF_INET;    // host byte order     their_addr.sin_port = htons(PORT);  // short, network byte order     their_addr.sin_addr = *((struct in_addr *)he->h_addr);    memset(their_addr.sin_zero, '\0', sizeof their_addr.sin_zero);    if (connect(sockfd, (struct sockaddr *)&their_addr,                                          sizeof their_addr) == -1) 	{        perror("connect");        exit(1);    }	    FD_ZERO(&main);    FD_ZERO(&temp);    FD_SET(sockfd, &main);    FD_SET(STDIN, &main);	cnt = 0;	sendbytes = 0;    loop = 1;    while(loop)    {	    temp = main;	    if(select(sockfd + 1, &temp, NULL, NULL, 0) == -1)	    {		    perror("select");		    loop = 0;	    }	    		if(FD_ISSET(sockfd,&temp))		{    	    if ((numbytes=recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1) 			{            	perror("recv");	            loop = 0;    	    }        	else if (numbytes > 0)	        {			    buf[numbytes] = '\0';					    printf("   > %s",buf);        	}	    }	    	    if(FD_ISSET(STDIN, &temp))	    {			fgets(buf,MAXDATASIZE-1,stdin);			sendbytes = strlen(buf) + 1; //MAXDATASIZE;			printf("\n");			if (sendbytes && send(sockfd, buf, sendbytes, 0) == -1) 			{	            perror("send");	            loop = 0;		    }	    	else	        {		       	sendbytes = 0;		    }				}	}    close(sockfd);    return 0;}