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-rw-r--r--util/spkmodem_decode/spkmodem-decode.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/util/spkmodem_decode/spkmodem-decode.c b/util/spkmodem_decode/spkmodem-decode.c
index 36b424b8..af60f997 100644
--- a/util/spkmodem_decode/spkmodem-decode.c
+++ b/util/spkmodem_decode/spkmodem-decode.c
@@ -386,8 +386,14 @@ select_separator_tone(struct decoder_state *st)
static int
is_valid_signal(struct decoder_state *st)
{
- return (st->freq_separator > 0 &&
- st->freq_data > 0);
+ if (st->freq_data <= 0)
+ return 0;
+
+ if (st->freq_separator < st->sep_min ||
+ st->freq_separator > st->sep_max)
+ return 0;
+
+ return 1;
}
/*