93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
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/* rfkill.c - rfkill interface and handling
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*
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* Copyright (c) 2015 Nicholas J. Kain <njkain at gmail dot 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 are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include <errno.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 <linux/rfkill.h>
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#include "nk/log.h"
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#include "nk/io.h"
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#include "ndhc.h"
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#include "netlink.h"
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#include "rfkill.h"
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int rfkill_open(char enable_rfkill[static 1])
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{
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if (!*enable_rfkill)
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return -1;
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int r = open("/dev/rfkill", O_RDONLY|O_CLOEXEC|O_NONBLOCK);
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if (r < 0) {
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*enable_rfkill = 0;
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log_line("rfkill disabled: could not open /dev/rfkill: %s",
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strerror(errno));
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}
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return r;
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}
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void handle_rfkill_notice(struct client_state_t cs[static 1], uint32_t rfkidx)
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{
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struct rfkill_event event;
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ssize_t len = safe_read(cs->rfkillFd, (char *)&event, sizeof event);
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if (len < 0) {
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log_error("rfkill: safe_read failed: %s", strerror(errno));
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return;
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}
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if (len != RFKILL_EVENT_SIZE_V1) {
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log_error("rfkill: event has unexpected size: %d", len);
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return;
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}
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log_line("rfkill: idx[%u] type[%u] op[%u] soft[%u] hard[%u]",
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event.idx, event.type, event.op, event.soft, event.hard);
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if (event.idx != rfkidx)
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return;
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if (event.op != RFKILL_OP_CHANGE && event.op != RFKILL_OP_CHANGE_ALL)
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return;
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if (event.soft || event.hard) {
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if (cs->ifsPrevState == IFS_UP) {
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log_line("rfkill: radio now blocked; bringing interface down");
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cs->ifsPrevState = IFS_DOWN;
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ifnocarrier_action(cs);
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} else
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log_line("rfkill: radio now blocked, but interface isn't up");
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} else {
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if (cs->ifsPrevState == IFS_DOWN) {
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log_line("rfkill: radio now unblocked; bringing interface up");
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cs->ifsPrevState = IFS_UP;
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ifup_action(cs);
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} else {
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if (cs->ifsPrevState == IFS_SHUT)
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log_line("rfkill: radio now unblocked, but interface was shut down by user");
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else
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log_line("rfkill: radio now unblocked, but interface is removed");
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}
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}
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}
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