Computer Network
//
//Client.c by Dr. Junwhan Kim
//This MUST be used for only CSCI315 at UDC
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#define MAXRCVLEN 500
#define PORTNUM 2300
int main(int argc, char *argv[])
char buffer[MAXRCVLEN + 1]; // for receiving
int len, mysocket;
struct sockaddr_in dest;
char msg[MAXRCVLEN + 1]; // for sending
mysocket = socket(AF_INET, SOCK_STREAM, 0);
memset(&dest, 0, sizeof(dest));
dest.sin_family = AF_INET;
dest.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
dest.sin_port = htons(PORTNUM);
connect(mysocket, (struct sockaddr *)&dest, sizeof(struct sockaddr));
len = recv(mysocket, buffer, MAXRCVLEN, 0);
if(len < 0){
perror("Reciver failed");
close(mysocket);
return EXIT_FAILURE;
}
else{
buffer[len] = '\0';
printf("I Received %s \n", buffer);
}
while(1){
printf("Enter a character ");
fgets(msg, sizeof(msg), stdin);
if(strncmp(msg, "exit", 4) == 0) break;
if(send(mysocket, msg, strlen(msg), 0) < 0){
perror("Send failed");
close(mysocket);
return EXIT_FAILURE;
}
memset(msg, 0, strlen(msg));
}
close(mysocket);
return EXIT_SUCCESS;