1 /* $NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $ */
4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 2008 Iain Hibbert
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $");
34 #include <sys/ioctl.h>
36 #define L2CAP_SOCKET_CHECKED
37 #include <bluetooth.h>
46 static struct event server_ev;
48 static int server_avail;
50 static void * server_ss;
51 static uint32_t server_handle;
53 static void server_open(void);
54 static void server_close(void);
55 static void server_read(int, short, void *);
56 static void server_register(void);
66 * The server_update() function is called whenever the channel count is
67 * changed. We maintain the SDP record and open or close the server socket
71 server_update(int count)
74 if (server_limit == 0)
77 log_debug("count %d", count);
79 server_avail = UINT8_MAX - (count - 1) * UINT8_MAX / server_limit;
80 log_info("Service Availability: %d/%d", server_avail, UINT8_MAX);
82 if (server_avail == 0 && server_fd != -1)
85 if (server_avail > 0 && server_fd == -1)
95 struct sockaddr_l2cap sa;
98 server_fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
99 if (server_fd == -1) {
100 log_err("Could not open L2CAP socket: %m");
104 memset(&sa, 0, sizeof(sa));
105 sa.l2cap_family = AF_BLUETOOTH;
106 sa.l2cap_len = sizeof(sa);
107 sa.l2cap_psm = htole16(l2cap_psm);
108 sa.l2cap_bdaddr_type = BDADDR_BREDR;
111 bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr);
112 if (bind(server_fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
113 log_err("Could not bind server socket: %m");
118 if (setsockopt(server_fd, SOL_L2CAP,
119 SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) {
120 log_err("Could not set L2CAP IMTU (%d): %m", mru);
124 if (listen(server_fd, 0) == -1) {
125 log_err("Could not listen on server socket: %m");
129 event_set(&server_ev, server_fd, EV_READ | EV_PERSIST, server_read, NULL);
130 if (event_add(&server_ev, NULL) == -1) {
131 log_err("Could not add server event: %m");
135 log_info("server socket open");
142 event_del(&server_ev);
146 log_info("server socket closed");
150 * handle connection request
153 server_read(int s, short ev, void *arg)
155 struct sockaddr_l2cap ra, la;
162 fd = accept(s, (struct sockaddr *)&ra, &len);
167 if (ioctl(fd, FIONBIO, &n) == -1) {
168 log_err("Could not set NonBlocking IO: %m");
174 if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) {
175 log_err("Could not get L2CAP IMTU: %m");
179 if(mru < BNEP_MTU_MIN) {
180 log_err("L2CAP IMTU too small (%d)", mru);
186 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) {
187 log_err("Could not read SO_RCVBUF");
191 if (n < (mru * 10)) {
193 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1)
194 log_info("Could not increase SO_RCVBUF (from %d)", n);
198 if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) {
199 log_err("Could not get L2CAP OMTU: %m");
203 if (mtu < BNEP_MTU_MIN) {
204 log_err("L2CAP OMTU too small (%d)", mtu);
210 if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) {
211 log_err("Could not get socket send buffer size: %m");
218 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) {
219 log_err("Could not set socket send buffer size (%d): %m", n);
226 if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) {
227 log_err("Could not set socket low water mark (%d): %m", n);
233 if (getsockname(fd, (struct sockaddr *)&la, &len) == -1) {
234 log_err("Could not get socket address: %m");
239 log_info("Accepted connection from %s", bt_ntoa(&ra.l2cap_bdaddr, NULL));
241 chan = channel_alloc();
247 chan->send = bnep_send;
248 chan->recv = bnep_recv;
251 b2eaddr(chan->raddr, &ra.l2cap_bdaddr);
252 b2eaddr(chan->laddr, &la.l2cap_bdaddr);
253 chan->state = CHANNEL_WAIT_CONNECT_REQ;
254 channel_timeout(chan, 10);
255 if (!channel_open(chan, fd)) {
256 chan->state = CHANNEL_CLOSED;
264 server_register(void)
269 if (server_ss == NULL) {
270 server_ss = sdp_open_local(control_path);
271 if (server_ss == NULL || sdp_error(server_ss) != 0) {
272 log_err("failed to contact SDP server");
277 memset(&p, 0, sizeof(p));
279 p.load_factor = server_avail;
280 p.security_description = (l2cap_mode == 0 ? 0x0000 : 0x0001);
283 rv = sdp_change_service(server_ss, server_handle,
284 (uint8_t *)&p, sizeof(p));
286 rv = sdp_register_service(server_ss, service_class,
287 &local_bdaddr, (uint8_t *)&p, sizeof(p), &server_handle);
290 errno = sdp_error(server_ss);
291 log_err("%s: %m", service_name);