tree ff1c55362a74f5a43d1c05d5d3924ab4d255f948
parent 86a5ac983f9715f7b1a0f8dee355906ac648e1d3
author Ed Tanous <edtanous@google.com> 1656443523 -0700
committer Ed Tanous <edtanous@google.com> 1685480175 -0700

Allow async resolver to be optional

This commit adds a meson option to allow selecting which dns resolver
bmcweb uses.  There are use cases, like Open Compute Project Inband
Management Agent, that would require not using dbus, which would require
us to fall back to the asio resolver.  This commit makes the existing
asio resolver constructor, and async_resolve methods match the
equivalents in asio (which we intended to do anyway), then adds a macro
and configure option for being able to select which resolver backend to
rely on.

Tested: Code can now compile without sdbusplus.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I3220214367179f131a60082bdfaf7e725d35c125