This patch removes calls to several deprecated asio functions.
* `io_service::post` becomes `post` (free function)
* `io_service::work` becomes `executor_work_guard`
* `io_service::wrap` becomes `bind_executor`
* `get_io_context` becomes `get_executor` or `get_executor().context()`
This patch was tested with boost 1.69 and 1.70. The functions
`ripple::get_lowest_layer` and `beast::create_waitable_timer` are required to
handle a breaking difference between these versions. When rippled no longer
needs to support pre 1.70 boost versions, both of these functions may be
removed, and the waitable timer injections may also be removed.
The default SSL cipher list introduced with 0.50.0 in
commit 2c87739 was overly restrictive and resulted in
clients unable to negotiate SSL connections.
Adjust the default cipher to the more sensible:
HIGH:MEDIUM:!aNULL:!MD5:!DSS:!3DES:!RC4:!EXPORT
Correct a bug that would not allow an SSL handshake
to properly complete if the port was configured using
the `wss` keyword.
Beast.WebSocket provides developers with a robust WebSocket
implementation built on Boost.Asio with a consistent asynchronous
model using a modern C++ approach.
Calculate the number of file descriptors that are needed during
execution based on the configuration file, with a hard floor
of 1024, adjusting the limit if possible. Refuse to run if enough
fds are not available.
Additionally, allow administrators to limit the number of incoming
connections a configured port will accept. By default no limit is
imposed.
Class io_list manages children that perform asynchronous
I/O operations. The treatment of close and destruction is
refactored to fix race conditions during exit.
