383 lines
9.5 KiB
C
383 lines
9.5 KiB
C
/* $NetBSD: server.c,v 1.8 2012/10/14 08:31:35 plunky Exp $ */
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/*-
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* Copyright (c) 2008-2009 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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#include <sys/cdefs.h>
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__RCSID("$NetBSD: server.c,v 1.8 2012/10/14 08:31:35 plunky Exp $");
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#include <sys/ioctl.h>
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#include <net/ethertypes.h>
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#include <bluetooth.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_count;
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static sdp_session_t server_ss;
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static uint32_t server_handle;
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static sdp_data_t server_record;
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static char * server_ipv4_subnet;
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static char * server_ipv6_subnet;
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static uint16_t server_proto[] = { ETHERTYPE_IP, ETHERTYPE_ARP, ETHERTYPE_IPV6 };
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static size_t server_nproto = __arraycount(server_proto);
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static void server_open(void);
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static void server_read(int, short, void *);
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static void server_down(channel_t *);
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static void server_update(void);
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static void server_mkrecord(void);
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void
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server_init(void)
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{
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if (server_limit == 0)
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return;
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server_open();
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server_update();
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}
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/*
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* Start listening on server socket
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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_bt sa;
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socklen_t len;
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uint16_t mru;
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int fd;
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fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
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if (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.bt_family = AF_BLUETOOTH;
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sa.bt_len = sizeof(sa);
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sa.bt_psm = l2cap_psm;
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bdaddr_copy(&sa.bt_bdaddr, &local_bdaddr);
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if (bind(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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if (setsockopt(fd, BTPROTO_L2CAP,
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SO_L2CAP_LM, &l2cap_mode, sizeof(l2cap_mode)) == -1) {
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log_err("Could not set link mode (0x%4.4x): %m", l2cap_mode);
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exit(EXIT_FAILURE);
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}
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len = sizeof(l2cap_mode);
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getsockopt(fd, BTPROTO_L2CAP, SO_L2CAP_LM, &l2cap_mode, &len);
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mru = BNEP_MTU_MIN;
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if (setsockopt(fd, BTPROTO_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(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, 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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/*
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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_bt 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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assert(server_count < server_limit);
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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, BTPROTO_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 < 10 * mru) {
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n = 10 * mru;
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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 (to %d)", n);
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}
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len = sizeof(mtu);
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if (getsockopt(fd, BTPROTO_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.bt_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->down = server_down;
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chan->mru = mru;
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chan->mtu = mtu;
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b2eaddr(chan->raddr, &ra.bt_bdaddr);
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b2eaddr(chan->laddr, &la.bt_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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if (++server_count == server_limit) {
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log_info("Server limit reached, closing server socket");
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event_del(&server_ev);
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close(s);
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}
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server_update();
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}
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/*
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* Shut down a server channel, we need to update the service record and
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* may want to restart accepting connections on the server socket
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*/
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static void
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server_down(channel_t *chan)
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{
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assert(server_count > 0);
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channel_close(chan);
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if (server_count-- == server_limit)
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server_open();
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server_update();
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}
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static void
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server_update(void)
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{
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bool rv;
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if (service_type == NULL)
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return;
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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) {
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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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server_mkrecord();
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if (server_handle == 0)
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rv = sdp_record_insert(server_ss, &local_bdaddr,
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&server_handle, &server_record);
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else
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rv = sdp_record_update(server_ss, server_handle,
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&server_record);
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if (!rv) {
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log_err("%s: %m", service_type);
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exit(EXIT_FAILURE);
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}
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}
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static void
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server_mkrecord(void)
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{
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static uint8_t data[256]; /* tis enough */
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sdp_data_t buf;
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size_t i;
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buf.next = data;
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buf.end = data + sizeof(data);
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sdp_put_uint16(&buf, SDP_ATTR_SERVICE_RECORD_HANDLE);
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sdp_put_uint32(&buf, 0x00000000);
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sdp_put_uint16(&buf, SDP_ATTR_SERVICE_CLASS_ID_LIST);
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sdp_put_seq(&buf, 3);
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sdp_put_uuid16(&buf, service_class);
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sdp_put_uint16(&buf, SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST);
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sdp_put_seq(&buf, 8 + 10 + 3 * server_nproto);
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sdp_put_seq(&buf, 6);
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sdp_put_uuid16(&buf, SDP_UUID_PROTOCOL_L2CAP);
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sdp_put_uint16(&buf, l2cap_psm);
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sdp_put_seq(&buf, 8 + 3 * server_nproto);
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sdp_put_uuid16(&buf, SDP_UUID_PROTOCOL_BNEP);
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sdp_put_uint16(&buf, 0x0100); /* v1.0 */
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sdp_put_seq(&buf, 3 * server_nproto);
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for (i = 0; i < server_nproto; i++)
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sdp_put_uint16(&buf, server_proto[i]);
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sdp_put_uint16(&buf, SDP_ATTR_BROWSE_GROUP_LIST);
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sdp_put_seq(&buf, 3);
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sdp_put_uuid16(&buf, SDP_SERVICE_CLASS_PUBLIC_BROWSE_GROUP);
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sdp_put_uint16(&buf, SDP_ATTR_LANGUAGE_BASE_ATTRIBUTE_ID_LIST);
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sdp_put_seq(&buf, 9);
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sdp_put_uint16(&buf, 0x656e); /* "en" */
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sdp_put_uint16(&buf, 106); /* UTF-8 */
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sdp_put_uint16(&buf, SDP_ATTR_PRIMARY_LANGUAGE_BASE_ID);
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sdp_put_uint16(&buf, SDP_ATTR_SERVICE_AVAILABILITY);
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sdp_put_uint8(&buf, (UINT8_MAX - server_count * UINT8_MAX / server_limit));
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sdp_put_uint16(&buf, SDP_ATTR_BLUETOOTH_PROFILE_DESCRIPTOR_LIST);
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sdp_put_seq(&buf, 8);
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sdp_put_seq(&buf, 6);
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sdp_put_uuid16(&buf, service_class);
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sdp_put_uint16(&buf, 0x0100); /* v1.0 */
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sdp_put_uint16(&buf, SDP_ATTR_PRIMARY_LANGUAGE_BASE_ID
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+ SDP_ATTR_SERVICE_NAME_OFFSET);
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sdp_put_str(&buf, service_name, -1);
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sdp_put_uint16(&buf, SDP_ATTR_PRIMARY_LANGUAGE_BASE_ID
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+ SDP_ATTR_SERVICE_DESCRIPTION_OFFSET);
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sdp_put_str(&buf, service_desc, -1);
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sdp_put_uint16(&buf, SDP_ATTR_SECURITY_DESCRIPTION);
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sdp_put_uint16(&buf, (l2cap_mode & L2CAP_LM_AUTH) ? 0x0001 : 0x0000);
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if (service_class == SDP_SERVICE_CLASS_NAP) {
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sdp_put_uint16(&buf, SDP_ATTR_NET_ACCESS_TYPE);
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sdp_put_uint16(&buf, 0x0004); /* 10Mb Ethernet */
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sdp_put_uint16(&buf, SDP_ATTR_MAX_NET_ACCESS_RATE);
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sdp_put_uint32(&buf, IF_Mbps(10) / 8); /* octets/second */
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}
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if (service_class == SDP_SERVICE_CLASS_NAP
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|| service_class == SDP_SERVICE_CLASS_GN) {
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if (server_ipv4_subnet) {
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sdp_put_uint16(&buf, SDP_ATTR_IPV4_SUBNET);
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sdp_put_str(&buf, server_ipv4_subnet, -1);
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}
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if (server_ipv6_subnet) {
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sdp_put_uint16(&buf, SDP_ATTR_IPV6_SUBNET);
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sdp_put_str(&buf, server_ipv6_subnet, -1);
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}
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}
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server_record.next = data;
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server_record.end = buf.next;
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}
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