54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
// Copyright 2015-2018 Nicholas J. Kain <njkain at gmail dot com>
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// SPDX-License-Identifier: MIT
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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 "rfkill.h"
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int rfkill_open(bool *enable_rfkill)
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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 = false;
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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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// check_idx: Does rfkidx have any meaning?
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// rfkidx: Pay attention only to this radio kill switch number.
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int rfkill_get(struct client_state_t *cs, int check_idx, 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_line("rfkill: safe_read failed: %s", strerror(errno));
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return RFK_FAIL;
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}
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if (len != RFKILL_EVENT_SIZE_V1) {
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log_line("rfkill: event has unexpected size: %zd", len);
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return RFK_FAIL;
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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 (check_idx && event.idx != rfkidx)
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return RFK_NONE;
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if (event.op != RFKILL_OP_CHANGE && event.op != RFKILL_OP_CHANGE_ALL)
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return RFK_NONE;
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if (event.soft || event.hard) {
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return RFK_ENABLED;
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} else {
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return RFK_DISABLED;
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}
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}
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