#define _POSIX_C_SOURCE 200112L
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

int open_tcp_connection(char *host, int port) {
	int sock, rv;
	struct addrinfo hint = { 0 };
	struct addrinfo *addr;

	hint.ai_family = AF_INET;
	hint.ai_socktype = SOCK_STREAM;

	rv = getaddrinfo(host, NULL, &hint, &addr); 
	if (rv != 0) {
		perror(gai_strerror(rv));
		return -1;
	}

	((struct sockaddr_in *)addr->ai_addr)->sin_port = htons(port);

	sock = socket(PF_INET, SOCK_STREAM, 0);
	if (sock != -1) {
		if (connect(sock, addr->ai_addr, addr->ai_addrlen) == -1) {
			perror("can't connect");
			close(sock);
			sock = -1;
		}
	}
	freeaddrinfo(addr);
	return sock;
}

#if 0
int main(int ac, char **av) {
	int socket;
	char *req = "GET / HTTP/1.1\r\nHost: granicus.if.org\r\nConnection: close\r\n\r\n";
	ssize_t bytes;
	char buffer[1024];

	socket = open_tcp_connection(av[1], 80);
	write(socket, req, strlen(req));
	while ((bytes = read(socket, buffer, sizeof buffer)) > 0) {
		write(1, buffer, bytes);
	}

	close(socket);
	return 0;
	
}
#endif