/*
 * Copyright (c) 2012 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup nterm
 * @{
 */
/** @file
 */

#include <byteorder.h>
#include <stdbool.h>
#include <errno.h>
#include <fibril.h>
#include <inet/dnsr.h>
#include <net/socket.h>
#include <stdio.h>
#include <str_error.h>
#include <sys/types.h>

#include "conn.h"
#include "nterm.h"

static int conn_fd;
static fid_t rcv_fid;

#define RECV_BUF_SIZE 1024
static uint8_t recv_buf[RECV_BUF_SIZE];

static int rcv_fibril(void *arg)
{
	ssize_t nr;

	while (true) {
		nr = recv(conn_fd, recv_buf, RECV_BUF_SIZE, 0);
		if (nr < 0)
			break;

		nterm_received(recv_buf, nr);
	}

	if (nr == ENOTCONN)
		printf("\n[Other side has closed the connection]\n");
	else
		printf("'\n[Receive errror (%s)]\n", str_error(nr));

	exit(0);
	return 0;
}

int conn_open(const char *addr_s, const char *port_s)
{
	int conn_fd = -1;
	
	/* Interpret as address */
	inet_addr_t addr_addr;
	int rc = inet_addr_parse(addr_s, &addr_addr);
	
	if (rc != EOK) {
		/* Interpret as a host name */
		dnsr_hostinfo_t *hinfo = NULL;
		rc = dnsr_name2host(addr_s, &hinfo, 0);
		
		if (rc != EOK) {
			printf("Error resolving host '%s'.\n", addr_s);
			goto error;
		}
		
		addr_addr = hinfo->addr;
	}
	
	struct sockaddr_in addr;
	struct sockaddr_in6 addr6;
	uint16_t af = inet_addr_sockaddr_in(&addr_addr, &addr, &addr6);
	
	char *endptr;
	uint16_t port = strtol(port_s, &endptr, 10);
	if (*endptr != '\0') {
		printf("Invalid port number %s\n", port_s);
		goto error;
	}
	
	printf("Connecting to host %s port %u\n", addr_s, port);
	
	conn_fd = socket(PF_INET, SOCK_STREAM, 0);
	if (conn_fd < 0)
		goto error;
	
	switch (af) {
	case AF_INET:
		addr.sin_port = htons(port);
		rc = connect(conn_fd, (struct sockaddr *) &addr, sizeof(addr));
		break;
	case AF_INET6:
		addr6.sin6_port = htons(port);
		rc = connect(conn_fd, (struct sockaddr *) &addr6, sizeof(addr6));
		break;
	default:
		printf("Unknown address family.\n");
		goto error;
	}
	
	if (rc != EOK)
		goto error;
	
	rcv_fid = fibril_create(rcv_fibril, NULL);
	if (rcv_fid == 0)
		goto error;
	
	fibril_add_ready(rcv_fid);
	
	return EOK;
	
error:
	if (conn_fd >= 0) {
		closesocket(conn_fd);
		conn_fd = -1;
	}
	
	return EIO;
}

int conn_send(void *data, size_t size)
{
	int rc = send(conn_fd, data, size, 0);
	if (rc != EOK)
		return EIO;
	
	return EOK;
}

/** @}
 */