Add ERCodeRule #6147
Merged
Add ERCodeRule #6147
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
rgacogne
approved these changes
Jan 8, 2018
| bool matches(const DNSQuestion* dq) const override | ||
| { | ||
| // avoid parsing EDNS OPT RR when not needed. | ||
| if (d_rcode != dq->dh->rcode) { |
There was a problem hiding this comment.
Given that dq->dh->rcode is unsigned, perhaps d_rcode should be too? Same for d_extrcode since edns0.extRCode is an uint8_t.
pdns/dnsdist-lua-rules.cc
Outdated
| char * optStart = NULL; | ||
| size_t optLen = 0; | ||
| bool last = false; | ||
| int res = locateEDNSOptRR((char*)dq->dh, dq->len, &optStart, &optLen, &last); |
There was a problem hiding this comment.
const_cast<char*>(reinterpret_cast<const char*>(dq->dh)) ? I don't think we'll manage to get rid of the existing C-style casts, but it would be nice to add new ones as few as possible :)
pdns/dnsdist-lua-rules.cc
Outdated
| } | ||
| EDNS0Record edns0; | ||
| static_assert(sizeof(EDNS0Record) == sizeof(uint32_t), "sizeof(EDNS0Record) must match sizeof(uint32_t) AKA RR TTL size"); | ||
| memcpy(&edns0, optStart + 5, sizeof edns0); |
There was a problem hiding this comment.
Adding a comment explaining where does the 5 comes from might be nice for later review.
|
Nits addressed |
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Outdated suggestions cannot be applied.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.
Short description
Add ERCodeRule to match on EDNS Extended RCodes.
Separate rule to avoid performance cost for non-EDNS packets. Unclear if this is a good idea for correctness.
Checklist
I have: