AIM:
To write a program for Server handling many clients using fork().
ALGORITHM:
SERVER:
STEP 1: Start
STEP 2: Declare the variables for the socket
STEP 3: Specify the family, protocol, IP address and port number
STEP 4: Create a socket using socket() function
STEP 5: Bind the IP address and Port number
STEP 6: Listen and accept the client’s request for the connection
STEP 7: Create the child process for the server
STEP 8: Display the child process ID and client’s message
STEP 9: Close the socket
STEP 12: Stop
CLIENT:
STEP 1: Start
STEP 2: Declare the variables for the socket
STEP 3: Specify the family, protocol, IP address and port number
STEP 4: Create a socket using socket() function
STEP 5: Call the connect() function
STEP 6: Send the message to the server
STEP 7: Close the socket
STEP 8: Stop
SOURCE CODE:
SERVER:
#include<stdio.h>
#include<arpa/inet.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netdb.h>
#define SERV_TCP_PORT 5035
int main(int argc,char**argv)
{
int i,sockfd,newsockfd,clength;
struct sockaddr_in serv_addr,cli_addr;
char buffer[4098];
pid_t childpid;
sockfd=socket(AF_INET,SOCK_STREAM,0);
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=INADDR_ANY;
serv_addr.sin_port=htons(SERV_TCP_PORT);
printf("\nStart");
bind(sockfd,(struct sockaddr*)&serv_addr,sizeof(serv_addr));
printf("\nListening...\n");
listen(sockfd,5);
i=1;
for(;;)
{
clength=sizeof(cli_addr);
listen(sockfd,5);
newsockfd=accept(sockfd,(struct sockaddr*)&cli_addr,&clength);
printf("\n\nAccepted");
if((childpid=fork())==0)
{
printf("\nChild PID is : %d",getpid());
read(newsockfd,buffer,4096);
printf("\nClient Message : %s",buffer);
}
close(newsockfd);
i++;
}
return 0;
}
CLIENT:
#include<stdio.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netdb.h>
#define SERV_TCP_PORT 5035
int main(int argc,char*argv[])
{
int sockfd;
struct sockaddr_in serv_addr;
struct hostent*server;
char buffer[4096];
while(buffer!="Quit")
{
sockfd=socket(AF_INET,SOCK_STREAM,0);
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=inet_addr("127.0.01");
serv_addr.sin_port=htons(SERV_TCP_PORT);
printf("\nReady for sending\n");
connect(sockfd,(struct sockaddr*)&serv_addr,sizeof(serv_addr));
fgets(buffer,4098,stdin);
write(sockfd,buffer,4098);
}
close(sockfd);
return 0;
}
OUTPUT:
SERVER:
CLIENT:
RESULT:
Thus the program for server handling many clients was executed and the output was verified.
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