server.c

/* A simple server in the internet domain using TCP
   The port number is passed as an argument */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "ts.c"

void error(const char *msg)
{
    perror(msg);
    exit(1);
}

int main(int argc, char *argv[])
{
    int sockfd, newsockfd, portno;
    socklen_t clilen;
    char buffer[256];
    struct sockaddr_in serv_addr, cli_addr;
    int n;
    if (argc < 2)
    {
        fprintf(stderr, "ERROR, no port provided\n");
        exit(1);
    }
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0)
        error("ERROR opening socket");
    bzero((char *)&serv_addr, sizeof(serv_addr));
    portno = atoi(argv[1]);
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = INADDR_ANY;
    serv_addr.sin_port = htons(portno);
    if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
        error("ERROR on binding");
    listen(sockfd, 5);
    clilen = sizeof(cli_addr);
    newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
    if (newsockfd < 0)
        error("ERROR on accept");
    while (1)
    {
        printf("Wait for your friend...\n");
        bzero(buffer, 256);
        n = read(newsockfd, buffer, 256);
        if (n < 0)
            error("ERROR reading from socket");
        printf("Friend : %s\n", buffer);
        if (strncmp("play()", buffer, 6) == 0)
        {
            printf("Game has started\n");
            int temp = play(newsockfd);
            printf("Game has ended\n");
            printf("You: ");
        }
        else if (strncmp("Send()", buffer, 6) == 0)
        {

            printf("Initiating....\n");
            Recv(newsockfd);
            printf("You: \n");
        }
        bzero(buffer, 256);
        printf("You: ");
        fgets(buffer, 256, stdin);
        n = write(newsockfd, buffer, strlen(buffer));
        if (n < 0)
            error("ERROR writing to socket");
        if (strncmp("play()", buffer, 6) == 0)
        {
            printf("Game has started\n");
            int temp = play(newsockfd);
            printf("Game has ended\n");
        }
        else if (strncmp("Send()", buffer, 6) == 0)
        {

            printf("Initiating....\n");
            Send(newsockfd);
        }
        int i = strncmp("Bye", buffer, 3);
        if (i == 0)
            break;
        bzero(buffer, 256);
    }
    close(newsockfd);
    close(sockfd);
    return 0;
}