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suunto_nautic: skip another app's subscription notifications in the /Data stream #15

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Merged
latishab merged 1 commit into from
Oct 23, 2026
Merged

suunto_nautic: skip another app's subscription notifications in the /Data stream #15

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10 changes: 10 additions & 0 deletions src/suunto_nautic.c
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Original file line number Diff line number Diff line change
Expand Up @@ -633,6 +633,16 @@ suunto_nautic_stream (suunto_nautic_device_t *device, const char *path, dc_buffe
break;
}

// Another app's subscriptions (the Suunto app holds several) push
// their values on the same link, as notifications with the same
// opcode and sequence number as our chunks but a different handle.
// Compare without the slot byte: our chunks carry the handle with
// slot F0, the GET reply with slot 00.
if (chunk_len >= 3 && (array_uint24_le (chunk) & ~0xFFu) != (handle & ~0xFFu)) {
DEBUG (abstract->context, "Skipping a notification for another subscription (%06x).", array_uint24_le (chunk));
continue;
}

if (chunk_len < CHUNK_DATA) {
ERROR (abstract->context, "Unexpected chunk size (" DC_PRINTF_SIZE ").", chunk_len);
status = DC_STATUS_PROTOCOL;
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