1/*-
2 * session.c
3 *
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 *
6 * Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $Id: session.c,v 1.2 2003/09/04 22:12:13 max Exp $
31 * $FreeBSD$
32 */
33#define L2CAP_SOCKET_CHECKED
34#include <bluetooth.h>
35#include <errno.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39
40#include <sdp-int.h>
41#include <sdp.h>
42
43void *
44sdp_open(bdaddr_t const *l, bdaddr_t const *r)
45{
46	sdp_session_p		ss = NULL;
47	struct sockaddr_l2cap	sa;
48	socklen_t		size;
49
50	if ((ss = calloc(1, sizeof(*ss))) == NULL)
51		goto fail;
52
53	if (l == NULL || r == NULL) {
54		ss->error = EINVAL;
55		goto fail;
56	}
57
58	ss->s = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
59	if (ss->s < 0) {
60		ss->error = errno;
61		goto fail;
62	}
63
64	sa.l2cap_len = sizeof(sa);
65	sa.l2cap_family = AF_BLUETOOTH;
66	sa.l2cap_psm = 0;
67	sa.l2cap_cid = 0;
68	sa.l2cap_bdaddr_type = BDADDR_BREDR;
69
70	memcpy(&sa.l2cap_bdaddr, l, sizeof(sa.l2cap_bdaddr));
71	if (bind(ss->s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
72		ss->error = errno;
73		goto fail;
74	}
75
76	sa.l2cap_psm = htole16(NG_L2CAP_PSM_SDP);
77	memcpy(&sa.l2cap_bdaddr, r, sizeof(sa.l2cap_bdaddr));
78	if (connect(ss->s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
79		ss->error = errno;
80		goto fail;
81	}
82
83	size = sizeof(ss->omtu);
84	if (getsockopt(ss->s, SOL_L2CAP, SO_L2CAP_OMTU, &ss->omtu, &size) < 0) {
85		ss->error = errno;
86		goto fail;
87	}
88	if ((ss->req = malloc(ss->omtu)) == NULL) {
89		ss->error = ENOMEM;
90		goto fail;
91	}
92	ss->req_e = ss->req + ss->omtu;
93
94	size = sizeof(ss->imtu);
95	if (getsockopt(ss->s, SOL_L2CAP, SO_L2CAP_IMTU, &ss->imtu, &size) < 0) {
96		ss->error = errno;
97		goto fail;
98	}
99	if ((ss->rsp = malloc(ss->imtu)) == NULL) {
100		ss->error = ENOMEM;
101		goto fail;
102	}
103	ss->rsp_e = ss->rsp + ss->imtu;
104	ss->error = 0;
105fail:
106	return ((void *) ss);
107}
108
109void *
110sdp_open_local(char const *control)
111{
112	sdp_session_p		ss = NULL;
113	struct sockaddr_un	sa;
114
115	if ((ss = calloc(1, sizeof(*ss))) == NULL)
116		goto fail;
117
118	ss->s = socket(PF_UNIX, SOCK_STREAM, 0);
119	if (ss->s < 0) {
120		ss->error = errno;
121		goto fail;
122	}
123
124	if (control == NULL)
125		control = SDP_LOCAL_PATH;
126
127	sa.sun_len = sizeof(sa);
128	sa.sun_family = AF_UNIX;
129	strlcpy(sa.sun_path, control, sizeof(sa.sun_path));
130
131	if (connect(ss->s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
132		ss->error = errno;
133		goto fail;
134	}
135
136	ss->flags |= SDP_SESSION_LOCAL;
137	ss->imtu = ss->omtu = SDP_LOCAL_MTU;
138
139	if ((ss->req = malloc(ss->omtu)) == NULL) {
140		ss->error = ENOMEM;
141		goto fail;
142	}
143	ss->req_e = ss->req + ss->omtu;
144
145	if ((ss->rsp = malloc(ss->imtu)) == NULL) {
146		ss->error = ENOMEM;
147		goto fail;
148	}
149	ss->rsp_e = ss->rsp + ss->imtu;
150	ss->error = 0;
151fail:
152	return ((void *) ss);
153}
154
155int32_t
156sdp_close(void *xss)
157{
158	sdp_session_p	ss = (sdp_session_p) xss;
159
160	if (ss != NULL) {
161		if (ss->s >= 0)
162			close(ss->s);
163
164		if (ss->req != NULL)
165			free(ss->req);
166		if (ss->rsp != NULL)
167			free(ss->rsp);
168
169		memset(ss, 0, sizeof(*ss));
170		free(ss);
171	}
172
173	return (0);
174}
175
176int32_t
177sdp_error(void *xss)
178{
179	sdp_session_p	ss = (sdp_session_p) xss;
180
181	return ((ss != NULL)? ss->error : EINVAL);
182}
183
184int32_t
185sdp_get_lcaddr(void *xss, bdaddr_t *l)
186{
187	sdp_session_p		ss = (sdp_session_p) xss;
188	struct sockaddr_l2cap	sa;
189	socklen_t		size;
190
191	if (l == NULL || ss == NULL || ss->flags & SDP_SESSION_LOCAL) {
192		ss->error = EINVAL;
193		goto fail;
194	}
195
196	size = sizeof(sa);
197	if (getsockname(ss->s, (struct sockaddr *)&sa, &size) == 0) {
198		bdaddr_copy(l, &sa.l2cap_bdaddr);
199		ss->error = 0;
200	} else
201		ss->error = errno;
202fail:
203	return ((ss->error == 0) ? 0 : -1);
204}
205