1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
359 lines
8.5 KiB
C
359 lines
8.5 KiB
C
/*
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* server.c
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*/
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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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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/* Pass device for probing after both channels are established */
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if (s->state == OPEN)
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hid_initialise(s);
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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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