simplify tcp flag checks, fix stream_follower #334
Merged
Conversation
This file contains 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
On various places was used simple comparison for checking state of flags. tcp.flags() == (TCP::SYN | TCP::ACK) This is not what you want usually, because this check is false in case that another flag is set also. Correct check for syn-ack packet should be: (tcp.flags() & (TCP::SYN | TCP::ACK)) == (TCP::SYN | TCP::ACK) To simplify this kind of check, add new has_flags method: bool TCP::has_flags(small_uint<12> check_flags) const
mfontanini
reviewed
Mar 13, 2019
|
Nice, good catch! |
|
Thanks! |
# for free
to join this conversation on GitHub.
Already have an account?
# 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Outdated suggestions cannot be applied.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.
On various places was used simple comparison for checking state of flags.
tcp.flags() == (TCP::SYN | TCP::ACK)This is not what you want usually, because this check is false
in case that another flag is set also. Correct check for syn-ack
packet should be:
(tcp.flags() & (TCP::SYN | TCP::ACK)) == (TCP::SYN | TCP::ACK)To simplify this kind of check, add new has_flags method:
bool TCP::has_flags(small_uint<12> check_flags) const