basic socket

websocketServer.c

#import <stdio.h>
#import <sys/socket.h>
#import <arpa/inet.h>
#import <stdlib.h>
#import <string.h>
#import <unistd.h>

#define MAXPENDING 5
void HandleTCPClient(int clntSocket);


int main(int argc, char *argv[]) {

    int wsServSock, wsClntSock;
    struct sockaddr_in wsServAddr, wsClntAddr;
    unsigned short wsPort;
    unsigned int clntLen;

    if (argc != 2) {
        printf(stderr, "Usage:  %s <Server Port>\n", argv[0]);
        exit(1);
    }

    wsPort = atoi(argv[1]);
    memset(&wsServAddr, 0, sizeof(wsServAddr));
    wsServAddr.sin_family = AF_INET;
    wsServAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    wsServAddr.sin_port = htons(wsPort); 

    if ((wsServSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
        printf("socket() failed");
    if (bind(wsServSock, (struct sockaddr *) &wsServAddr, sizeof(wsServAddr)) < 0 )
        printf("bind() failed");
    if (listen(wsServSock, MAXPENDING) < 0)
        printf("listen() failed");

    for(;;) {
        clntLen = sizeof(wsClntAddr);
        if ((wsClntSock = accept(wsServSock, (struct sockaddr *) &wsClntAddr, 
                               &clntLen)) < 0)
            printf("accept() failed");

        printf("Handling client %s\n", inet_ntoa(wsClntAddr.sin_addr));
        //HandleTCPClient(wsClntSock);
        }

    return 0;
}