/* $NetBSD: session.c,v 1.2 2007/04/07 21:08:46 plunky Exp $ */
/* $DragonFly: src/lib/libsdp/session.c,v 1.1 2008/01/03 11:47:53 hasso Exp $ */

/*-
 * Copyright (c) 2006 Itronix Inc.
 * All rights reserved.
 *
 * Written by Iain Hibbert for Itronix Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. The name of Itronix Inc. may not be used to endorse
 *    or promote products derived from this software without specific
 *    prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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.
 */
/*
 * session.c
 *
 * Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *
 * $Id: session.c,v 1.2 2007/04/07 21:08:46 plunky Exp $
 * $FreeBSD: src/lib/libsdp/session.c,v 1.3 2004/01/09 22:44:28 emax Exp $
 */

#include <sys/types.h>
#include <sys/un.h>
#include <bluetooth.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <sdp-int.h>
#include <sdp.h>

void *
sdp_open(bdaddr_t const *l, bdaddr_t const *r)
{
	sdp_session_p		ss = NULL;
	struct sockaddr_bt	sa;
	struct linger		li;
	socklen_t		size;

	if ((ss = calloc(1, sizeof(*ss))) == NULL)
		goto fail;

	if (l == NULL || r == NULL) {
		ss->error = EINVAL;
		goto fail;
	}

	ss->s = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
	if (ss->s < 0) {
		ss->error = errno;
		goto fail;
	}

	memset(&li, 0, sizeof(li));
	li.l_onoff = 1;
	li.l_linger = 5;
	if (setsockopt(ss->s, SOL_SOCKET, SO_LINGER, &li, sizeof(li)) < 0) {
		ss->error = errno;
		goto fail;
	}

	memset(&sa, 0, sizeof(sa));
	sa.bt_len = sizeof(sa);
	sa.bt_family = AF_BLUETOOTH;
	bdaddr_copy(&sa.bt_bdaddr, l);
	if (bind(ss->s, (void *) &sa, sizeof(sa)) < 0) {
		ss->error = errno;
		goto fail;
	}

	sa.bt_psm = L2CAP_PSM_SDP;
	bdaddr_copy(&sa.bt_bdaddr, r);
	if (connect(ss->s, (void *) &sa, sizeof(sa)) < 0) {
		ss->error = errno;
		goto fail;
	}

	size = sizeof(ss->omtu);
	if (getsockopt(ss->s, BTPROTO_L2CAP, SO_L2CAP_OMTU, &ss->omtu, &size) < 0) {
		ss->error = errno;
		goto fail;
	}
	if ((ss->req = malloc((size_t)ss->omtu)) == NULL) {
		ss->error = ENOMEM;
		goto fail;
	}
	ss->req_e = ss->req + ss->omtu;

	size = sizeof(ss->imtu);
	if (getsockopt(ss->s, BTPROTO_L2CAP, SO_L2CAP_IMTU, &ss->imtu, &size) < 0) {
		ss->error = errno;
		goto fail;
	}
	if ((ss->rsp = malloc((size_t)ss->imtu)) == NULL) {
		ss->error = ENOMEM;
		goto fail;
	}
	ss->rsp_e = ss->rsp + ss->imtu;
	ss->error = 0;
fail:
	return ((void *) ss);
}

void *
sdp_open_local(char const *control)
{
	sdp_session_p		ss = NULL;
	struct sockaddr_un	sa;

	if ((ss = calloc(1, sizeof(*ss))) == NULL)
		goto fail;

	ss->s = socket(PF_LOCAL, SOCK_STREAM, 0);
	if (ss->s < 0) {
		ss->error = errno;
		goto fail;
	}

	if (control == NULL)
		control = SDP_LOCAL_PATH;

	sa.sun_len = sizeof(sa);
	sa.sun_family = AF_LOCAL;
	strlcpy(sa.sun_path, control, sizeof(sa.sun_path));

	if (connect(ss->s, (void *) &sa, sizeof(sa)) < 0) {
		ss->error = errno;
		goto fail;
	}

	ss->flags |= SDP_SESSION_LOCAL;
	ss->imtu = ss->omtu = SDP_LOCAL_MTU;

	if ((ss->req = malloc((size_t)ss->omtu)) == NULL) {
		ss->error = ENOMEM;
		goto fail;
	}
	ss->req_e = ss->req + ss->omtu;

	if ((ss->rsp = malloc((size_t)ss->imtu)) == NULL) {
		ss->error = ENOMEM;
		goto fail;
	}
	ss->rsp_e = ss->rsp + ss->imtu;
	ss->error = 0;
fail:
	return ((void *) ss);
}

int32_t
sdp_close(void *xss)
{
	sdp_session_p	ss = (sdp_session_p) xss;

	if (ss != NULL) {
		if (ss->s >= 0)
			close(ss->s);

		if (ss->req != NULL)
			free(ss->req);
		if (ss->rsp != NULL)
			free(ss->rsp);

		memset(ss, 0, sizeof(*ss));
		free(ss);
	}

	return (0);
}

int32_t
sdp_error(void *xss)
{
	sdp_session_p	ss = (sdp_session_p) xss;

	return ((ss != NULL)? ss->error : EINVAL);
}