AIM:
To write a program for TCP connection establishment.
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: Establish the connection with the client
STEP 8: Close the socket
STEP 9: 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: Close the socket
STEP 7: Stop
SOURCE CODE:
SERVER:
#include<stdio.h>
#include<arpa/inet.h>
#include<sys/socket.h>
#include<sys/types.h>
#define SERV_TCP_PORT 5035
int main(int argc,char **argv)
{
int sockfd,newsockfd,clength;
struct sockaddr_in serv_addr,cli_addr;
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...");
listen(sockfd,1);
clength=sizeof(cli_addr);
newsockfd=accept(sockfd,(struct sockaddr*)&cli_addr,&clength);
printf("\nAccepted\n");
close(sockfd);
return 0;
}
CLIENT:
#include<stdio.h>
#include<arpa/inet.h>
#include<sys/socket.h>
#include<sys/types.h>
#define CLI_TCP_PORT 5035
int main(int argc,char **argv)
{
int sockfd;
struct sockaddr_in serv_addr;
struct hostent * server;
sockfd=socket(AF_INET,SOCK_STREAM,0);
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
serv_addr.sin_port=htons(CLI_TCP_PORT);
printf("\nReady for connect\n");
connect(sockfd,(struct sockaddr*)&serv_addr,sizeof(serv_addr));
close(sockfd);
return 0;
}
OUTPUT:
SERVER:
CLIENT:
Thus the program for TCP connection establishment was executed and the output was verified.
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