353 lines
8.3 KiB
C
353 lines
8.3 KiB
C
/*
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* server.c
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*/
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/*-
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* Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: server.c,v 1.9 2006/09/07 21:06:53 max Exp $
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* $FreeBSD$
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*/
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#include <sys/queue.h>
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#include <assert.h>
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#define L2CAP_SOCKET_CHECKED
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#include <bluetooth.h>
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#include <dev/vkbd/vkbd_var.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <usbhid.h>
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#include "bthid_config.h"
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#include "bthidd.h"
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#include "kbd.h"
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#undef max
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#define max(x, y) (((x) > (y))? (x) : (y))
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static int32_t server_accept (bthid_server_p srv, int32_t fd);
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static int32_t server_process(bthid_server_p srv, int32_t fd);
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/*
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* Initialize server
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*/
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int32_t
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server_init(bthid_server_p srv)
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{
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struct sockaddr_l2cap l2addr;
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assert(srv != NULL);
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srv->ctrl = srv->intr = -1;
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FD_ZERO(&srv->rfdset);
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FD_ZERO(&srv->wfdset);
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LIST_INIT(&srv->sessions);
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/* Open /dev/consolectl */
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srv->cons = open("/dev/consolectl", O_RDWR);
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if (srv->cons < 0) {
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syslog(LOG_ERR, "Could not open /dev/consolectl. %s (%d)",
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strerror(errno), errno);
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return (-1);
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}
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/* Create control socket */
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srv->ctrl = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
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if (srv->ctrl < 0) {
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syslog(LOG_ERR, "Could not create control L2CAP socket. " \
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"%s (%d)", strerror(errno), errno);
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close(srv->cons);
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return (-1);
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}
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l2addr.l2cap_len = sizeof(l2addr);
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l2addr.l2cap_family = AF_BLUETOOTH;
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memcpy(&l2addr.l2cap_bdaddr, &srv->bdaddr, sizeof(l2addr.l2cap_bdaddr));
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l2addr.l2cap_psm = htole16(0x11);
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l2addr.l2cap_bdaddr_type = BDADDR_BREDR;
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l2addr.l2cap_cid = 0;
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if (bind(srv->ctrl, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) {
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syslog(LOG_ERR, "Could not bind control L2CAP socket. " \
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"%s (%d)", strerror(errno), errno);
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close(srv->ctrl);
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close(srv->cons);
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return (-1);
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}
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if (listen(srv->ctrl, 10) < 0) {
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syslog(LOG_ERR, "Could not listen on control L2CAP socket. " \
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"%s (%d)", strerror(errno), errno);
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close(srv->ctrl);
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close(srv->cons);
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return (-1);
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}
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/* Create intrrupt socket */
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srv->intr = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
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if (srv->intr < 0) {
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syslog(LOG_ERR, "Could not create interrupt L2CAP socket. " \
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"%s (%d)", strerror(errno), errno);
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close(srv->ctrl);
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close(srv->cons);
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return (-1);
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}
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l2addr.l2cap_psm = htole16(0x13);
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if (bind(srv->intr, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) {
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syslog(LOG_ERR, "Could not bind interrupt L2CAP socket. " \
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"%s (%d)", strerror(errno), errno);
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close(srv->intr);
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close(srv->ctrl);
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close(srv->cons);
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return (-1);
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}
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if (listen(srv->intr, 10) < 0) {
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syslog(LOG_ERR, "Could not listen on interrupt L2CAP socket. "\
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"%s (%d)", strerror(errno), errno);
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close(srv->intr);
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close(srv->ctrl);
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close(srv->cons);
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return (-1);
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}
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FD_SET(srv->ctrl, &srv->rfdset);
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FD_SET(srv->intr, &srv->rfdset);
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srv->maxfd = max(srv->ctrl, srv->intr);
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return (0);
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}
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/*
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* Shutdown server
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*/
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void
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server_shutdown(bthid_server_p srv)
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{
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assert(srv != NULL);
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close(srv->cons);
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close(srv->ctrl);
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close(srv->intr);
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while (!LIST_EMPTY(&srv->sessions))
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session_close(LIST_FIRST(&srv->sessions));
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memset(srv, 0, sizeof(*srv));
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}
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/*
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* Do one server iteration
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*/
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int32_t
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server_do(bthid_server_p srv)
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{
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struct timeval tv;
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fd_set rfdset, wfdset;
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int32_t n, fd;
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assert(srv != NULL);
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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/* Copy cached version of the fd sets and call select */
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memcpy(&rfdset, &srv->rfdset, sizeof(rfdset));
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memcpy(&wfdset, &srv->wfdset, sizeof(wfdset));
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n = select(srv->maxfd + 1, &rfdset, &wfdset, NULL, &tv);
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if (n < 0) {
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if (errno == EINTR)
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return (0);
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syslog(LOG_ERR, "Could not select(%d, %p, %p). %s (%d)",
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srv->maxfd + 1, &rfdset, &wfdset, strerror(errno), errno);
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return (-1);
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}
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/* Process descriptors (if any) */
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for (fd = 0; fd < srv->maxfd + 1 && n > 0; fd ++) {
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if (FD_ISSET(fd, &rfdset)) {
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n --;
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if (fd == srv->ctrl || fd == srv->intr)
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server_accept(srv, fd);
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else
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server_process(srv, fd);
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} else if (FD_ISSET(fd, &wfdset)) {
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n --;
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client_connect(srv, fd);
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}
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}
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return (0);
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}
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/*
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* Accept new connection
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*/
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static int32_t
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server_accept(bthid_server_p srv, int32_t fd)
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{
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bthid_session_p s;
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hid_device_p d;
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struct sockaddr_l2cap l2addr;
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int32_t new_fd;
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socklen_t len;
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len = sizeof(l2addr);
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if ((new_fd = accept(fd, (struct sockaddr *) &l2addr, &len)) < 0) {
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syslog(LOG_ERR, "Could not accept %s connection. %s (%d)",
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(fd == srv->ctrl)? "control" : "interrupt",
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strerror(errno), errno);
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return (-1);
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}
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/* Is device configured? */
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if ((d = get_hid_device(&l2addr.l2cap_bdaddr)) == NULL) {
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syslog(LOG_ERR, "Rejecting %s connection from %s. " \
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"Device not configured",
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(fd == srv->ctrl)? "control" : "interrupt",
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bt_ntoa(&l2addr.l2cap_bdaddr, NULL));
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close(new_fd);
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return (-1);
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}
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/* Check if we have session for the device */
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if ((s = session_by_bdaddr(srv, &l2addr.l2cap_bdaddr)) == NULL) {
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d->new_device = 0; /* reset new device flag */
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write_hids_file();
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/* Create new inbound session */
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if ((s = session_open(srv, d)) == NULL) {
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syslog(LOG_CRIT, "Could not open inbound session "
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"for %s", bt_ntoa(&l2addr.l2cap_bdaddr, NULL));
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close(new_fd);
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return (-1);
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}
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}
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/* Update descriptors */
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if (fd == srv->ctrl) {
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assert(s->ctrl == -1);
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s->ctrl = new_fd;
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s->state = (s->intr == -1)? W4INTR : OPEN;
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} else {
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assert(s->intr == -1);
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s->intr = new_fd;
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s->state = (s->ctrl == -1)? W4CTRL : OPEN;
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}
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FD_SET(new_fd, &srv->rfdset);
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if (new_fd > srv->maxfd)
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srv->maxfd = new_fd;
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syslog(LOG_NOTICE, "Accepted %s connection from %s",
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(fd == srv->ctrl)? "control" : "interrupt",
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bt_ntoa(&l2addr.l2cap_bdaddr, NULL));
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/* Register session's vkbd descriptor (if needed) for read */
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if (s->state == OPEN && d->keyboard) {
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assert(s->vkbd != -1);
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FD_SET(s->vkbd, &srv->rfdset);
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if (s->vkbd > srv->maxfd)
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srv->maxfd = s->vkbd;
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}
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return (0);
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}
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/*
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* Process data on the connection
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*/
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static int32_t
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server_process(bthid_server_p srv, int32_t fd)
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{
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bthid_session_p s = session_by_fd(srv, fd);
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int32_t len, to_read;
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int32_t (*cb)(bthid_session_p, uint8_t *, int32_t);
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union {
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uint8_t b[1024];
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vkbd_status_t s;
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} data;
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if (s == NULL)
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return (0); /* can happen on device disconnect */
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if (fd == s->ctrl) {
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cb = hid_control;
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to_read = sizeof(data.b);
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} else if (fd == s->intr) {
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cb = hid_interrupt;
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to_read = sizeof(data.b);
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} else {
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assert(fd == s->vkbd);
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cb = kbd_status_changed;
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to_read = sizeof(data.s);
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}
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do {
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len = read(fd, &data, to_read);
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} while (len < 0 && errno == EINTR);
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if (len < 0) {
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syslog(LOG_ERR, "Could not read data from %s (%s). %s (%d)",
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bt_ntoa(&s->bdaddr, NULL),
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(fd == s->ctrl)? "control" : "interrupt",
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strerror(errno), errno);
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session_close(s);
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return (0);
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}
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if (len == 0) {
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syslog(LOG_NOTICE, "Remote device %s has closed %s connection",
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bt_ntoa(&s->bdaddr, NULL),
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(fd == s->ctrl)? "control" : "interrupt");
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session_close(s);
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return (0);
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}
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(*cb)(s, (uint8_t *) &data, len);
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return (0);
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}
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