#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>

int main(int argc, char **argv)
{
	int r;
	char buf[256], buf2[32];
	struct addrinfo *ai, hints = { .ai_protocol = IPPROTO_TCP, .ai_flags = 0, .ai_family = AF_UNSPEC };
	char *name = argc>1 ? argv[1][0] ? argv[1] : 0 : 0;
	char *serv = argc>2 ? argv[2] : 0;

	r = getaddrinfo(name, serv, &hints, &ai);
	if (r<0)
		printf("%s: %s\n", name, gai_strerror(r));
	else for (; ai; ai = ai->ai_next)
		if (!getnameinfo(ai->ai_addr,
			ai->ai_addrlen, buf, sizeof buf,
			buf2, sizeof buf2, NI_NUMERICHOST|NI_NUMERICSERV))
			printf("%s: %s %s %s %s %s\n", name?name:"NULL",
				ai->ai_canonname, buf, buf2,
				ai->ai_protocol == IPPROTO_TCP ? "tcp" : "udp",
				ai->ai_socktype == SOCK_STREAM ? "stream" : "dgram");
	return 0;
}