1 /* $NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $ */
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
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.
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $");
35 #include <sys/ioctl.h>
37 #define L2CAP_SOCKET_CHECKED
38 #include <bluetooth.h>
47 static struct event server_ev;
49 static int server_avail;
51 static void * server_ss;
52 static uint32_t server_handle;
54 static void server_open(void);
55 static void server_close(void);
56 static void server_read(int, short, void *);
57 static void server_register(void);
67 * The server_update() function is called whenever the channel count is
68 * changed. We maintain the SDP record and open or close the server socket
72 server_update(int count)
75 if (server_limit == 0)
78 log_debug("count %d", count);
80 server_avail = UINT8_MAX - (count - 1) * UINT8_MAX / server_limit;
81 log_info("Service Availability: %d/%d", server_avail, UINT8_MAX);
83 if (server_avail == 0 && server_fd != -1)
86 if (server_avail > 0 && server_fd == -1)
96 struct sockaddr_l2cap sa;
99 server_fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
100 if (server_fd == -1) {
101 log_err("Could not open L2CAP socket: %m");
105 memset(&sa, 0, sizeof(sa));
106 sa.l2cap_family = AF_BLUETOOTH;
107 sa.l2cap_len = sizeof(sa);
108 sa.l2cap_psm = htole16(l2cap_psm);
109 sa.l2cap_bdaddr_type = BDADDR_BREDR;
112 bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr);
113 if (bind(server_fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
114 log_err("Could not bind server socket: %m");
119 if (setsockopt(server_fd, SOL_L2CAP,
120 SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) {
121 log_err("Could not set L2CAP IMTU (%d): %m", mru);
125 if (listen(server_fd, 0) == -1) {
126 log_err("Could not listen on server socket: %m");
130 event_set(&server_ev, server_fd, EV_READ | EV_PERSIST, server_read, NULL);
131 if (event_add(&server_ev, NULL) == -1) {
132 log_err("Could not add server event: %m");
136 log_info("server socket open");
143 event_del(&server_ev);
147 log_info("server socket closed");
151 * handle connection request
154 server_read(int s, short ev, void *arg)
156 struct sockaddr_l2cap ra, la;
163 fd = accept(s, (struct sockaddr *)&ra, &len);
168 if (ioctl(fd, FIONBIO, &n) == -1) {
169 log_err("Could not set NonBlocking IO: %m");
175 if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) {
176 log_err("Could not get L2CAP IMTU: %m");
180 if(mru < BNEP_MTU_MIN) {
181 log_err("L2CAP IMTU too small (%d)", mru);
187 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) {
188 log_err("Could not read SO_RCVBUF");
192 if (n < (mru * 10)) {
194 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1)
195 log_info("Could not increase SO_RCVBUF (from %d)", n);
199 if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) {
200 log_err("Could not get L2CAP OMTU: %m");
204 if (mtu < BNEP_MTU_MIN) {
205 log_err("L2CAP OMTU too small (%d)", mtu);
211 if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) {
212 log_err("Could not get socket send buffer size: %m");
219 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) {
220 log_err("Could not set socket send buffer size (%d): %m", n);
227 if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) {
228 log_err("Could not set socket low water mark (%d): %m", n);
234 if (getsockname(fd, (struct sockaddr *)&la, &len) == -1) {
235 log_err("Could not get socket address: %m");
240 log_info("Accepted connection from %s", bt_ntoa(&ra.l2cap_bdaddr, NULL));
242 chan = channel_alloc();
248 chan->send = bnep_send;
249 chan->recv = bnep_recv;
252 b2eaddr(chan->raddr, &ra.l2cap_bdaddr);
253 b2eaddr(chan->laddr, &la.l2cap_bdaddr);
254 chan->state = CHANNEL_WAIT_CONNECT_REQ;
255 channel_timeout(chan, 10);
256 if (!channel_open(chan, fd)) {
257 chan->state = CHANNEL_CLOSED;
265 server_register(void)
270 if (server_ss == NULL) {
271 server_ss = sdp_open_local(control_path);
272 if (server_ss == NULL || sdp_error(server_ss) != 0) {
273 log_err("failed to contact SDP server");
278 memset(&p, 0, sizeof(p));
280 p.load_factor = server_avail;
281 p.security_description = (l2cap_mode == 0 ? 0x0000 : 0x0001);
284 rv = sdp_change_service(server_ss, server_handle,
285 (uint8_t *)&p, sizeof(p));
287 rv = sdp_register_service(server_ss, service_class,
288 &local_bdaddr, (uint8_t *)&p, sizeof(p), &server_handle);
291 errno = sdp_error(server_ss);
292 log_err("%s: %m", service_name);