1 files changed, 294 insertions, 0 deletions
diff --git a/usr.sbin/bluetooth/btpand/server.c b/usr.sbin/bluetooth/btpand/server.c
new file mode 100644
index 000000000000..f0967d058ca4
--- /dev/null
+++ b/usr.sbin/bluetooth/btpand/server.c
@@ -0,0 +1,294 @@
+/*	$NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $	*/
+
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2008 Iain Hibbert
+ * 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 ``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.
+ */
+
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $");
+
+#include <sys/ioctl.h>
+
+#define L2CAP_SOCKET_CHECKED
+#include <bluetooth.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sdp.h>
+#include <unistd.h>
+
+#include "btpand.h"
+#include "bnep.h"
+
+static struct event	server_ev;
+static int		server_fd;
+static int		server_avail;
+
+static void *		server_ss;
+static uint32_t		server_handle;
+
+static void server_open(void);
+static void server_close(void);
+static void server_read(int, short, void *);
+static void server_register(void);
+
+void
+server_init(void)
+{
+
+	server_fd = -1;
+}
+
+/*
+ * The server_update() function is called whenever the channel count is
+ * changed. We maintain the SDP record and open or close the server socket
+ * as required.
+ */
+void
+server_update(int count)
+{
+
+	if (server_limit == 0)
+		return;
+
+	log_debug("count %d", count);
+
+	server_avail = UINT8_MAX - (count - 1) * UINT8_MAX / server_limit;
+	log_info("Service Availability: %d/%d", server_avail, UINT8_MAX);
+
+	if (server_avail == 0 && server_fd != -1)
+		server_close();
+
+	if (server_avail > 0 && server_fd == -1)
+		server_open();
+
+	if (service_name)
+		server_register();
+}
+
+static void
+server_open(void)
+{
+	struct sockaddr_l2cap sa;
+	uint16_t mru;
+
+	server_fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
+	if (server_fd == -1) {
+		log_err("Could not open L2CAP socket: %m");
+		exit(EXIT_FAILURE);
+	}
+
+	memset(&sa, 0, sizeof(sa));
+	sa.l2cap_family = AF_BLUETOOTH;
+	sa.l2cap_len = sizeof(sa);
+	sa.l2cap_psm = htole16(l2cap_psm);
+	sa.l2cap_bdaddr_type = BDADDR_BREDR;
+	sa.l2cap_cid = 0;
+	
+	bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr);
+	if (bind(server_fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
+		log_err("Could not bind server socket: %m");
+		exit(EXIT_FAILURE);
+	}
+
+	mru = BNEP_MTU_MIN;
+	if (setsockopt(server_fd, SOL_L2CAP,
+	    SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) {
+		log_err("Could not set L2CAP IMTU (%d): %m", mru);
+		exit(EXIT_FAILURE);
+	}
+
+	if (listen(server_fd, 0) == -1) {
+		log_err("Could not listen on server socket: %m");
+		exit(EXIT_FAILURE);
+	}
+
+	event_set(&server_ev, server_fd, EV_READ | EV_PERSIST, server_read, NULL);
+	if (event_add(&server_ev, NULL) == -1) {
+		log_err("Could not add server event: %m");
+		exit(EXIT_FAILURE);
+	}
+
+	log_info("server socket open");
+}
+
+static void
+server_close(void)
+{
+
+	event_del(&server_ev);
+	close(server_fd);
+	server_fd = -1;
+
+	log_info("server socket closed");
+}
+
+/*
+ * handle connection request
+ */
+static void
+server_read(int s, short ev, void *arg)
+{
+	struct sockaddr_l2cap ra, la;
+	channel_t *chan;
+	socklen_t len;
+	int fd, n;
+	uint16_t mru, mtu;
+
+	len = sizeof(ra);
+	fd = accept(s, (struct sockaddr *)&ra, &len);
+	if (fd == -1)
+		return;
+
+	n = 1;
+	if (ioctl(fd, FIONBIO, &n) == -1) {
+		log_err("Could not set NonBlocking IO: %m");
+		close(fd);
+		return;
+	}
+
+	len = sizeof(mru);
+	if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) {
+		log_err("Could not get L2CAP IMTU: %m");
+		close(fd);
+		return;
+	}
+	if(mru < BNEP_MTU_MIN) {
+		log_err("L2CAP IMTU too small (%d)", mru);
+		close(fd);
+		return;
+	}
+
+	len = sizeof(n);
+	if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) {
+		log_err("Could not read SO_RCVBUF");
+		close(fd);
+		return;
+	}
+	if (n < (mru * 10)) {
+		n = mru * 10;
+		if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1)
+			log_info("Could not increase SO_RCVBUF (from %d)", n);
+	}
+
+	len = sizeof(mtu);
+	if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) {
+		log_err("Could not get L2CAP OMTU: %m");
+		close(fd);
+		return;
+	}
+	if (mtu < BNEP_MTU_MIN) {
+		log_err("L2CAP OMTU too small (%d)", mtu);
+		close(fd);
+		return;
+	}
+
+	len = sizeof(n);
+	if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) {
+		log_err("Could not get socket send buffer size: %m");
+		close(fd);
+		return;
+	}
+
+	if (n < (mtu * 2)) {
+		n = mtu * 2;
+		if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) {
+			log_err("Could not set socket send buffer size (%d): %m", n);
+			close(fd);
+			return;
+		}
+	}
+
+	n = mtu;
+	if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) {
+		log_err("Could not set socket low water mark (%d): %m", n);
+		close(fd);
+		return;
+	}
+
+	len = sizeof(la);
+	if (getsockname(fd, (struct sockaddr *)&la, &len) == -1) {
+		log_err("Could not get socket address: %m");
+		close(fd);
+		return;
+	}
+
+	log_info("Accepted connection from %s", bt_ntoa(&ra.l2cap_bdaddr, NULL));
+
+	chan = channel_alloc();
+	if (chan == NULL) {
+		close(fd);
+		return;
+	}
+
+	chan->send = bnep_send;
+	chan->recv = bnep_recv;
+	chan->mru = mru;
+	chan->mtu = mtu;
+	b2eaddr(chan->raddr, &ra.l2cap_bdaddr);
+	b2eaddr(chan->laddr, &la.l2cap_bdaddr);
+	chan->state = CHANNEL_WAIT_CONNECT_REQ;
+	channel_timeout(chan, 10);
+	if (!channel_open(chan, fd)) {
+		chan->state = CHANNEL_CLOSED;
+		channel_free(chan);
+		close(fd);
+		return;
+	}
+}
+
+static void
+server_register(void)
+{
+	sdp_nap_profile_t p;
+	int rv;
+
+	if (server_ss == NULL) {
+		server_ss = sdp_open_local(control_path);
+		if (server_ss == NULL || sdp_error(server_ss) != 0) {
+			log_err("failed to contact SDP server");
+			return;
+		}
+	}
+
+	memset(&p, 0, sizeof(p));
+	p.psm = l2cap_psm;
+	p.load_factor = server_avail;
+	p.security_description = (l2cap_mode == 0 ? 0x0000 : 0x0001);
+
+	if (server_handle)
+		rv = sdp_change_service(server_ss, server_handle,
+		    (uint8_t *)&p, sizeof(p));
+	else
+		rv = sdp_register_service(server_ss, service_class,
+		    &local_bdaddr, (uint8_t *)&p, sizeof(p), &server_handle);
+
+	if (rv != 0) {
+		errno = sdp_error(server_ss);
+		log_err("%s: %m", service_name);
+		exit(EXIT_FAILURE);
+	}
+}