290 lines
6.8 KiB
C
290 lines
6.8 KiB
C
/* $NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $ */
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/*-
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* Copyright (c) 2008 Iain Hibbert
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $FreeBSD$ */
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $");
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#include <sys/ioctl.h>
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#include <bluetooth.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <sdp.h>
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#include <unistd.h>
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#include "btpand.h"
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#include "bnep.h"
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static struct event server_ev;
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static int server_fd;
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static int server_avail;
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static void * server_ss;
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static uint32_t server_handle;
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static void server_open(void);
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static void server_close(void);
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static void server_read(int, short, void *);
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static void server_register(void);
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void
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server_init(void)
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{
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server_fd = -1;
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}
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/*
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* The server_update() function is called whenever the channel count is
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* changed. We maintain the SDP record and open or close the server socket
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* as required.
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*/
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void
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server_update(int count)
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{
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if (server_limit == 0)
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return;
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log_debug("count %d", count);
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server_avail = UINT8_MAX - (count - 1) * UINT8_MAX / server_limit;
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log_info("Service Availability: %d/%d", server_avail, UINT8_MAX);
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if (server_avail == 0 && server_fd != -1)
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server_close();
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if (server_avail > 0 && server_fd == -1)
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server_open();
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if (service_name)
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server_register();
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}
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static void
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server_open(void)
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{
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struct sockaddr_l2cap sa;
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uint16_t mru;
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server_fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
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if (server_fd == -1) {
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log_err("Could not open L2CAP socket: %m");
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exit(EXIT_FAILURE);
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}
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memset(&sa, 0, sizeof(sa));
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sa.l2cap_family = AF_BLUETOOTH;
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sa.l2cap_len = sizeof(sa);
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sa.l2cap_psm = htole16(l2cap_psm);
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bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr);
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if (bind(server_fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
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log_err("Could not bind server socket: %m");
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exit(EXIT_FAILURE);
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}
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mru = BNEP_MTU_MIN;
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if (setsockopt(server_fd, SOL_L2CAP,
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SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) {
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log_err("Could not set L2CAP IMTU (%d): %m", mru);
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exit(EXIT_FAILURE);
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}
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if (listen(server_fd, 0) == -1) {
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log_err("Could not listen on server socket: %m");
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exit(EXIT_FAILURE);
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}
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event_set(&server_ev, server_fd, EV_READ | EV_PERSIST, server_read, NULL);
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if (event_add(&server_ev, NULL) == -1) {
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log_err("Could not add server event: %m");
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exit(EXIT_FAILURE);
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}
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log_info("server socket open");
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}
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static void
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server_close(void)
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{
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event_del(&server_ev);
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close(server_fd);
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server_fd = -1;
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log_info("server socket closed");
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}
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/*
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* handle connection request
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*/
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static void
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server_read(int s, short ev, void *arg)
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{
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struct sockaddr_l2cap ra, la;
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channel_t *chan;
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socklen_t len;
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int fd, n;
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uint16_t mru, mtu;
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len = sizeof(ra);
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fd = accept(s, (struct sockaddr *)&ra, &len);
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if (fd == -1)
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return;
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n = 1;
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if (ioctl(fd, FIONBIO, &n) == -1) {
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log_err("Could not set NonBlocking IO: %m");
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close(fd);
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return;
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}
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len = sizeof(mru);
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if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) {
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log_err("Could not get L2CAP IMTU: %m");
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close(fd);
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return;
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}
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if(mru < BNEP_MTU_MIN) {
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log_err("L2CAP IMTU too small (%d)", mru);
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close(fd);
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return;
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}
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len = sizeof(n);
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if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) {
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log_err("Could not read SO_RCVBUF");
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close(fd);
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return;
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}
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if (n < (mru * 10)) {
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n = mru * 10;
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if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1)
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log_info("Could not increase SO_RCVBUF (from %d)", n);
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}
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len = sizeof(mtu);
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if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) {
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log_err("Could not get L2CAP OMTU: %m");
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close(fd);
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return;
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}
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if (mtu < BNEP_MTU_MIN) {
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log_err("L2CAP OMTU too small (%d)", mtu);
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close(fd);
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return;
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}
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len = sizeof(n);
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if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) {
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log_err("Could not get socket send buffer size: %m");
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close(fd);
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return;
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}
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if (n < (mtu * 2)) {
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n = mtu * 2;
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if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) {
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log_err("Could not set socket send buffer size (%d): %m", n);
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close(fd);
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return;
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}
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}
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n = mtu;
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if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) {
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log_err("Could not set socket low water mark (%d): %m", n);
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close(fd);
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return;
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}
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len = sizeof(la);
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if (getsockname(fd, (struct sockaddr *)&la, &len) == -1) {
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log_err("Could not get socket address: %m");
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close(fd);
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return;
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}
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log_info("Accepted connection from %s", bt_ntoa(&ra.l2cap_bdaddr, NULL));
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chan = channel_alloc();
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if (chan == NULL) {
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close(fd);
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return;
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}
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chan->send = bnep_send;
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chan->recv = bnep_recv;
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chan->mru = mru;
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chan->mtu = mtu;
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b2eaddr(chan->raddr, &ra.l2cap_bdaddr);
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b2eaddr(chan->laddr, &la.l2cap_bdaddr);
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chan->state = CHANNEL_WAIT_CONNECT_REQ;
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channel_timeout(chan, 10);
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if (!channel_open(chan, fd)) {
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chan->state = CHANNEL_CLOSED;
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channel_free(chan);
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close(fd);
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return;
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}
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}
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static void
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server_register(void)
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{
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sdp_nap_profile_t p;
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int rv;
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if (server_ss == NULL) {
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server_ss = sdp_open_local(control_path);
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if (server_ss == NULL || sdp_error(server_ss) != 0) {
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log_err("failed to contact SDP server");
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return;
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}
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}
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memset(&p, 0, sizeof(p));
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p.psm = l2cap_psm;
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p.load_factor = server_avail;
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p.security_description = (l2cap_mode == 0 ? 0x0000 : 0x0001);
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if (server_handle)
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rv = sdp_change_service(server_ss, server_handle,
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(uint8_t *)&p, sizeof(p));
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else
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rv = sdp_register_service(server_ss, service_class,
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&local_bdaddr, (uint8_t *)&p, sizeof(p), &server_handle);
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if (rv != 0) {
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errno = sdp_error(server_ss);
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log_err("%s: %m", service_name);
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exit(EXIT_FAILURE);
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}
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}
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