threaded server in c - c

Question

I did not found an answer to my question before, nor did i know if that has an specific name for what i want to do, basically i have a program that runs a simulation, with graphical interface and calculations in the background, and i want to control it through commands with a tcp basic server/client but this means that i have to incorporate the server function inside the controlling function, so i made my server inside a thread and i am running something in the main function, while i call the server function in a thread just for testing, but i cannot send anything to the server, my client application does not get a response, and the server does not receive anything... the code is messy because i am testing a lot of stuff in it, and the identation is messy too...
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
int test= 0;
void threadServer(){
int sockfd, newsockfd, portno, clilen;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n, c;
/* First call to socket() function */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
perror("ERROR opening socket");
exit(1);
}
/* Initialize socket structure */
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = 5001;
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
/* Now bind the host address using bind() call.*/
if (bind(sockfd, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0)
{
perror("ERROR on binding");
exit(1);
}
/* Now start listening for the clients, here process will
* go in sleep mode and will wait for the incoming connection
*/
listen(sockfd,5);
clilen = sizeof(cli_addr);
while(c){
/* Accept actual connection from the client */
newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr,
&clilen);
if (newsockfd < 0)
{
perror("ERROR on accept");
exit(1);
}
/* If connection is established then start communicating */
bzero(buffer,256);
n = read( newsockfd,buffer,255 );
if (n < 0)
{
perror("ERROR reading from socket");
exit(1);
}
//if(buffer[0]==t){
//c=0;
//exit(1);
//}else{
//c=1;
//}
printf("Here is the message: %s\n",buffer);
/* Write a response to the client */
n = write(newsockfd,"I got your message",18);
if (n < 0)
{
perror("ERROR writing to socket");
exit(1);
}
test =1;
}
//return 0;
}
void main(){
pthread_t threads[1];
int rc;
long t;
char k;
printf("In main: creating thread %ld\n", t);
rc = pthread_create(&threads[t], NULL, threadServer, (void *)t);
if(rc){
printf("ERROR; return code from pthread_create() is %d\n", rc);
exit(-1);
}
while(1){
printf("type any key:\n");
scanf("%c",&k);
printf("you typed %c\n", k);
printf("testing server thread : %d\n", test);
}
/* Last thing that main() should do */
pthread_exit(NULL);
}