// forwarder.c by Dr. Junwan Kim
// This program MUST be used for only csci315 at UDC
//
#include
#include
#include
#include
#include
#include
#include
#include
#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;
}
//
//Client.c by Dr. Junwhan Kim
//This MUST be used for only CSCI315 at UDC
//
#include
#include
#include
#include
#include
#include
#include
#include
#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;
}
// Server.c by Dr. Junwan Kim
// This program MUST be used for only csci315 at UDC
//
#include
#include
#include
#include
#include
#include
#include
#include
#define PORTNUM 2400
#define MAXRCVLEN 500
int main(int argc, char *argv[])
{
char* msg = "HI CSCI315\n";
char buffer[MAXRCVLEN + 1];
int len, consocket;
struct sockaddr_in dest;
struct sockaddr_in serv;
int mysocket;
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(PORTNUM);
mysocket = socket(AF_INET, SOCK_STREAM, 0);
bind(mysocket, (struct sockaddr *)&serv, sizeof(struct sockaddr));
do{
listen(mysocket, 1);
consocket = accept(mysocket, (struct sockaddr *)&dest, &socksize);
send(consocket, msg, strlen(msg), 0);
while(len=recv(consocket, buffer, MAXRCVLEN, 0)>0){
if(strncmp(buffer, "exit", 4) == 0){
break;
}
printf("Server Received: %s ", buffer);
memset(buffer, 0, strlen(buffer));
}
printf("Goodbye !\n");
close(consocket);
}while(consocket);
close(mysocket);
return EXIT_SUCCESS;
}
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