Fix DNSServer crash #6354
Merged
Fix DNSServer crash #6354
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
… address it. Therefore the datatype was changed to uint16_t.
|
|
|
thanks @BlueAndi |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
Because of the changes in #6206 it is necessary to change the QNameLength datatype to uint16_t, to be able to address the QName max. size of 256.
Impact
The problem appears int the following lines from the DNSServer.cpp if QNameLength is 255. The wrap around destroys the following memcpy.
arduino-esp32/libraries/DNSServer/src/DNSServer.cpp
Lines 88 to 93 in b254765