Raw AF_INET ICMP sockets

[Andy Pfiffer]

I'm trying to get a public domain pinger (from Mike Muus, Army Ballistic
Research Lab.) to run.  Simply, why does:

	.
	.
	if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) {
		perror("ping: socket");
		exit(5);
	}
	.
	.

generate:

	ping: socket: Protocol wrong type for socket

??  Can't I create a socket like this? It runs setuid root...
Frustrated. Help...
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