Computer Network
// forwarder.c by Dr. Junwan Kim
// This program 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 PORTNUM1 2300
#define PORTNUM2 2400
#define MAXRCVLEN 500
int main(int argc, char *argv[])
char* msg = "HI CSCI315 from Inter-server\n";
char buffer[MAXRCVLEN + 1];
int len, consocket;
struct sockaddr_in dest;
struct sockaddr_in serv;
struct sockaddr_in client;
int server_socket;
int client_socket;
// For server
socklen_t socksize = sizeof(struct sockaddr_in);
memset(&serv, 0, sizeof(serv));
serv.sin_family = AF_INET;
serv.sin_addr.s_addr = htonl(INADDR_ANY);
serv.sin_port = htons(PORTNUM1);
server_socket = socket(AF_INET, SOCK_STREAM, 0);
bind(server_socket, (struct sockaddr *)&serv, sizeof(struct sockaddr));
// Write your code for for client here
// socket, connect, and recv here
// printf("As a client, I Received %s \n", buffer);
// memset(buffer, 0, strlen(buffer));
printf("Server starts...\n");
do{
listen(server_socket, 1);
consocket = accept(server_socket, (struct sockaddr *)&dest, &socksize);
send(consocket, msg, strlen(msg), 0);
while(len=recv(consocket, buffer, MAXRCVLEN, 0)>0){
printf("Received: %s ", buffer);
// As a client, send "buffer" here
if(strncmp(buffer, "exit", 4) == 0){
break;
}
memset(buffer, 0, strlen(buffer));
}
printf("Goodbye !\n");
close(consocket);
}while(consocket);
close(client_socket);
close(server_socket);
return EXIT_SUCCESS;