need help with DGRAM socket

[Meitham <meithamj@xxxxxxxxx>]

Hi,

I am trying to use a datagram socket in the client side to send a pocket
but with no luck. I have a server running on the machine listening on
port 5000. What is wrong with this code? And, does anyone please can
write a simpler code to send a packet to DGRAM socket on localhost.
I keep getting this error:

lamp.c: In function ‘chgStatus’:
lamp.c:62: warning: assignment makes pointer from integer without a cast
lamp.c:65: error: dereferencing pointer to incomplete type
lamp.c:67: error: dereferencing pointer to incomplete type
lamp.c:75: warning: passing argument 5 of ‘sendto’ from incompatible
pointer type


Thanks in advance
~Meitham


Code of the method in lamp.c

void chgStatus (short status) {
    int sock, length, n;
    struct sockaddr_in server;
    struct hostent *hp;
    int portno = 5000;
    char buffer[256];
    sock = socket(AF_INET, SOCK_DGRAM, 0);
    if (sock < 0) error("ERROR opening socket");

    server.sin_family = AF_INET;
    hp = gethostbyname("localhost");
    if (hp==0) error("Unknown host");
    bzero((char *) &server, sizeof(server));
    bcopy((char *)hp->h_addr,
	 (char *)&server.sin_addr,
	  hp->h_length);
    server.sin_port = htons(portno);
    length = sizeof(struct sockaddr_in);

    if (status) strcpy(buffer, "C1");
    else strcpy(buffer, "C0");
    n = sendto(sock, buffer,
		strlen(buffer),
		0, &server, length);

    if (n < 0) error("ERROR sending to socket");
    printf("%s\n",buffer);
    return;
}