The main purpose of this PR is to modularize the communication library,
and streamline the code paths for TCP and UDP into a single flow. This
will help us add additional flows such as TLS, and also make sure these
communication functions return a known set of error codes so that
additional error codes can be added for new flows in the future.
It also adds a new optional callback of
`ares_set_notify_pending_write_callback()` that will assist in
aggregating data from multiple queries into a single write operation.
This doesn't apply to UDP, but on TCP and especially TLS in the future
this can be a significant win. This is automatically applied for the
Event Thread.
It also fixes a long standing issue if UDP connection became saturated
and started returning `EWOULDBLOCK` or `EAGAIN` it was treated as a
failure. Since this is more inline with the TCP code now, it will wait
on a write event to retry.
Finally there are additional cleanups due to not needing to be able to
retrieve socket errnos all over the place.
Authored-By: Brad House (@bradh352)
When referring to another c-ares function use \fI function(3) \fP to let
the webpage rendering find and cross-link them appropriately.
SEE ALSO references should be ".BR name (3),", with a space before the
open parenthesis. This helps the manpage to HTML renderer.
Closes#565
All files have their licence and copyright information clearly
identifiable. If not in the file header, they are set separately in
.reuse/dep5.
All used license texts are provided in LICENSES/
To make them render "nicer" in both terminals and on the website.
- Removes the bold
- Removes .PP lines
- Indents them more like proper code style
Fix By: Daniel Stenberg (@bagder)
Originally started by Daniel Stenberg (@bagder) with #123, this patch reorganizes the c-ares source tree to have a more modern layout. It also fixes out of tree builds for autotools, and automatically builds the tests if tests are enabled. All tests are passing which tests each of the supported build systems (autotools, cmake, nmake, mingw gmake). There may be some edge cases that will have to be caught later on for things I'm not aware of.
Fix By: Brad House (@bradh352)
The rc4 function iterates over a buffer of size buffer_len who's maximum
value is INT_MAX with a counter of type short that is not guaranteed to
have maximum size INT_MAX.
In circumstances where short is narrower than int and where buffer_len
is larger than the maximum value of a short, it may be possible to loop
infinitely as counter will overflow and never be greater than or equal
to buffer_len.
The solution is to make the comparison be between types of equal width.
This commit defines counter as an int.
Fix By: Fionn Fitzmaurice (@fionn)
Brad House
Daniel Stenberg
Fionn Fitzmaurice