From 025327b091470744cbe457c1cfd96f9ecb225237 Mon Sep 17 00:00:00 2001
From: Anders Blomdell <anders.blomdell@control.lth.se>
Date: Fri, 22 Mar 2019 08:58:23 +0100
Subject: [PATCH] Only allow access to I/O that exists
---
plugins/serial2002/serial2002.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/plugins/serial2002/serial2002.c b/plugins/serial2002/serial2002.c
index ae0af1b..4017406 100644
--- a/plugins/serial2002/serial2002.c
+++ b/plugins/serial2002/serial2002.c
@@ -367,6 +367,28 @@ static int channel_down(struct moberg_channel *channel)
static struct moberg_status channel_open(struct moberg_channel *channel)
{
struct moberg_status result = device_open(channel->context->device);
+ int count = 0;
+ switch (channel->kind) {
+ case chan_ANALOGIN:
+ count = channel->context->device->analog_in.count;
+ break;
+ case chan_ANALOGOUT:
+ count = channel->context->device->analog_out.count;
+ break;
+ case chan_DIGITALIN:
+ count = channel->context->device->digital_in.count;
+ break;
+ case chan_DIGITALOUT:
+ count = channel->context->device->digital_out.count;
+ break;
+ case chan_ENCODERIN:
+ count = channel->context->device->encoder_in.count;
+ break;
+ }
+ if (channel->context->index >= count) {
+ device_close(channel->context->device);
+ result = MOBERG_ERRNO(ENODEV);
+ }
return result;
}
--
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