118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
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/**
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* @file NCDRfkillMonitor.c
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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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 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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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY 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 THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <misc/debug.h>
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#include <misc/nonblocking.h>
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#include <base/BLog.h>
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#include "NCDRfkillMonitor.h"
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#include <generated/blog_channel_NCDRfkillMonitor.h>
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#define RFKILL_DEVICE_NODE "/dev/rfkill"
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static void rfkill_fd_handler (NCDRfkillMonitor *o, int events);
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void rfkill_fd_handler (NCDRfkillMonitor *o, int events)
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{
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DebugObject_Access(&o->d_obj);
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// read from netlink fd
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struct rfkill_event event;
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int len = read(o->rfkill_fd, &event, sizeof(event));
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if (len < 0) {
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BLog(BLOG_ERROR, "read failed");
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return;
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}
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if (len != sizeof(event)) {
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BLog(BLOG_ERROR, "read returned wrong length");
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return;
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}
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// call handler
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o->handler(o->user, event);
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return;
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}
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int NCDRfkillMonitor_Init (NCDRfkillMonitor *o, BReactor *reactor, NCDRfkillMonitor_handler handler, void *user)
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{
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// init arguments
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o->reactor = reactor;
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o->handler = handler;
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o->user = user;
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// open rfkill
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if ((o->rfkill_fd = open(RFKILL_DEVICE_NODE, O_RDONLY)) < 0) {
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BLog(BLOG_ERROR, "open failed");
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goto fail0;
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}
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// set fd non-blocking
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if (!badvpn_set_nonblocking(o->rfkill_fd)) {
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BLog(BLOG_ERROR, "badvpn_set_nonblocking failed");
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goto fail1;
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}
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// init BFileDescriptor
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BFileDescriptor_Init(&o->bfd, o->rfkill_fd, (BFileDescriptor_handler)rfkill_fd_handler, o);
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if (!BReactor_AddFileDescriptor(o->reactor, &o->bfd)) {
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BLog(BLOG_ERROR, "BReactor_AddFileDescriptor failed");
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goto fail1;
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}
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BReactor_SetFileDescriptorEvents(o->reactor, &o->bfd, BREACTOR_READ);
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DebugObject_Init(&o->d_obj);
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return 1;
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fail1:
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if (close(o->rfkill_fd) < 0) {
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BLog(BLOG_ERROR, "close failed");
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}
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fail0:
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return 0;
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}
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void NCDRfkillMonitor_Free (NCDRfkillMonitor *o)
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{
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DebugObject_Free(&o->d_obj);
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// free BFileDescriptor
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BReactor_RemoveFileDescriptor(o->reactor, &o->bfd);
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// close rfkill
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if (close(o->rfkill_fd) < 0) {
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BLog(BLOG_ERROR, "close failed");
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}
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}
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