c-ares

859 Commits

14 Branches

96 Tags

22 MiB

Tag: Branch: Tree: 07827dcabe

Commit Graph

Author	SHA1	Message	Date
Brad House	02745437e6	Improve socket function replacement subsystem (#894 ) Some external users swap out the entire IP stack, such as [Seastar](https://github.com/scylladb/seastar) that uses DPDK. So we need to allow them to override all network stack functions used by c-ares. Since we don't know what network functions may be needed in the future, we need to make a versioned structure that can be expanded. We'll need to disable any features in the future if the versioned interface is less than is required to support any new features. We recently had a regression when we added DNS Cookie support as we relied on `getsockname()` to get the local source ip address, but we were calling the native version since there was no registered callback available. We will mark this as optional and just skip this step in DNS Cookie invalidation if its not available for the legacy api users. Supersedes #893 Authored-By: Brad House (@bradh352)	2 months ago
Brad House	e5585105cd	Add ares_queue_active_queries() (#712 ) Add a function to request the number of active queries from an ares channel. This will return the number of inflight requests to dns servers. Some functions like `ares_getaddrinfo()` when using `AF_UNSPEC` may enqueue multiple queries which will be reflected in this count. In the future, if we implement support for queuing (e.g. for throttling purposes), and/or implement support for tracking user-requested queries (e.g. for cancelation), we can provide additional functions for inspecting those queues. Fix By: Brad House (@bradh352)	9 months ago

Author

SHA1

Message

Date

Brad House

02745437e6

Improve socket function replacement subsystem (#894 )

Some external users swap out the entire IP stack, such as
[Seastar](https://github.com/scylladb/seastar) that uses DPDK. So we
need to allow them to override all network stack functions used by
c-ares. Since we don't know what network functions may be needed in the
future, we need to make a versioned structure that can be expanded.
We'll need to disable any features in the future if the versioned
interface is less than is required to support any new features.

We recently had a regression when we added DNS Cookie support as we
relied on `getsockname()` to get the local source ip address, but we
were calling the native version since there was no registered callback
available. We will mark this as optional and just skip this step in DNS
Cookie invalidation if its not available for the legacy api users.

Supersedes #893 
Authored-By: Brad House (@bradh352)

2 months ago

Brad House

e5585105cd

Add ares_queue_active_queries() (#712 )

Add a function to request the number of active queries from an ares
channel. This will return the number of inflight requests to dns
servers. Some functions like `ares_getaddrinfo()` when using `AF_UNSPEC`
may enqueue multiple queries which will be reflected in this count.

In the future, if we implement support for queuing (e.g. for throttling
purposes), and/or implement support for tracking user-requested queries
(e.g. for cancelation), we can provide additional functions for
inspecting those queues.

Fix By: Brad House (@bradh352)

9 months ago

1 Commits (07827dcabe59babe977c209a67af0fc5068e414f)