Kennt jemand diesen (Netzwerk?) Header: in.h

[...]

Hallo Forum,

ich möchte diesen Source compilieren und finde den Header in.h nicht. Ist der herstellerabhängig?

http://www.nettwerked.net/actiontec.html

/* test prog for actiontec router hack 
 * by: omin0us
 * help from Sub.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <string.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define PORT 5035 
#define DEST_IP "192.168.0.255"

int main()
{

	int sockfd;
	struct sockaddr_in actiontec_addr;
	int bytes_sent;
	char packet_data[] = 
			"\x00\x00\x16\x02\x02\x00\x00\x00"
			"\x01\x00\xa8\xc0\x00\x00\x00\x00";

	if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
	{
		fprintf(stderr, "Error: could not establish socket\n");
		exit(1);
	}

	actiontec_addr.sin_family = AF_INET;
	actiontec_addr.sin_port = htons(PORT);
	actiontec_addr.sin_addr.s_addr = inet_addr(DEST_IP);
	memset(&(actiontec_addr.sin_zero), '\0', 8);

	if((bytes_sent = sendto(sockfd, packet_data, strlen(packet_data), 0,
		(struct sockaddr *)&actiontec_addr, sizeof(struct sockaddr))) == -1)
	{
		fprintf(stderr,"error: could not send data\n");
		exit(1);
	}

	printf("sent %d bytes\n", bytes_sent);
	close(sockfd);

	return(0);
}

[...]

Hab den Fehler gefunden. War ein Mißverständins