Iterative TCP echo Server Code in C in Linux Platform

//TCP SERVER Iterative: only one client is handled
//if next client sends any thing the server will not receive till first client is not closed.
#include<stdio.h>
#include<sys/types.h>//socket
#include<sys/socket.h>//socket
#include<string.h>//memset
#include<stdlib.h>//sizeof
#include<netinet/in.h>//INADDR_ANY

#define PORT 8000
#define MAXSZ 100
int main()
{
int sockfd;//to create socket
int newsockfd;//to accept connection

struct sockaddr_in serverAddress;//server receive on this address
struct sockaddr_in clientAddress;//server sends to client on this address

int n;
char msg[MAXSZ];
int clientAddressLength;

//create socket
sockfd=socket(AF_INET,SOCK_STREAM,0);
//initialize the socket addresses
memset(&serverAddress,0,sizeof(serverAddress));
serverAddress.sin_family=AF_INET;
serverAddress.sin_addr.s_addr=htonl(INADDR_ANY);
serverAddress.sin_port=htons(PORT);

//bind the socket with the server address and port
bind(sockfd,(struct sockaddr *)&serverAddress, sizeof(serverAddress));

//listen for connection from client
listen(sockfd,5);

//accept a connection
while(1)
{
printf("\n*****server waiting for new client connection:*****\n");
clientAddressLength=sizeof(clientAddress);
newsockfd=accept(sockfd,(struct sockaddr*)&clientAddress,&clientAddressLength);

//rceive from client
while(1)
{
n=recv(newsockfd,msg,MAXSZ,0);
if(n==0)
{
close(newsockfd);
break;
}
msg[n]=0;
send(newsockfd,msg,n,0);

printf("Receive and set:%s\n",msg);
}//close interior while
}//close exterior while

return 0;
}
/*
   ms@ubuntu:~/ipc_socket$ gcc tcpserver.c -o s
   ms@ubuntu:~/ipc_socket$ ./s

 *****server waiting for new client connection:*****
 Receive and set:India

 Receive and set:IS

 Receive and set:Great

 */

/**********Client*************/
//CLIENT ITERATIVE

#include<stdio.h>
#include<sys/types.h>//socket
#include<sys/socket.h>//socket
#include<string.h>//memset
#include<stdlib.h>//sizeof
#include<netinet/in.h>//INADDR_ANY

#define PORT 8000
#define SERVER_IP "127.0.0.1"
#define MAXSZ 100
int main()
{
int sockfd;//to create socket

struct sockaddr_in serverAddress;//client will connect on this

int n;
char msg1[MAXSZ];
char msg2[MAXSZ];

//create socket
sockfd=socket(AF_INET,SOCK_STREAM,0);
//initialize the socket addresses
memset(&serverAddress,0,sizeof(serverAddress));
serverAddress.sin_family=AF_INET;
serverAddress.sin_addr.s_addr=inet_addr(SERVER_IP);
serverAddress.sin_port=htons(PORT);

//client  connect to server on port
connect(sockfd,(struct sockaddr *)&serverAddress,sizeof(serverAddress));
//send to sever and receive from server
while(1)
{
printf("\nEnter message to send to server:\n");
fgets(msg1,MAXSZ,stdin);
if(msg1[0]=='#')
break;

n=strlen(msg1)+1;
send(sockfd,msg1,n,0);

n=recv(sockfd,msg2,MAXSZ,0);

printf("Receive message from  server::%s\n",msg2);
}

return 0;
}
/*
client:

ms@ubuntu:~/ipc_socket$ gcc tcpclient.c -o c
ms@ubuntu:~/ipc_socket$ ./c

Enter message to send to server:
India
Receive message from  server::India


Enter message to send to server:
IS
Receive message from  server::IS


Enter message to send to server:
Great
Receive message from  server::Great


Enter message to send to server:
*/

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