If we got IPv4 lookup response, we don't wait for IPv6 lookup
response. This is because DNS server may drop AAAA query and we have
to wait for the long time before timeout. We don't do the inverse,
because, based on todays deployment of DNS server, almost all of them
can respond A query just fine.
Currently, aria2 checks configured addresses at the startup. But there
are chances that interfaces are not setup at that moment. For example,
if aria2 is used as daemon, it may start before network interfaces
up. To workaround this, we check addresses again if both addresses are
not configured at the startup.
This change makes --save-session save only options specified for
download, more specifically, options in command-line, -i file and via
RPC. The other options from conf file and default values are not
saved. This will drastically decrease the size of session file.
The currently used URIs are inserted back into remaining URI list in
FileEntry::putBackRequest(), which overlaps to some of the URIs in
spentUris_. If we save spent URIs, each time save is performed, the
number of URIs are increased due to this overlap. This change fixes
this bug.
LibUV event will use the best available polling method on a system, kind
of like aria2 does already with the different *EventPoll
implementations.
However, libuv may support different/newer polling mechanisms; for
example on Windows it will use IO Completion Ports which are superior to
select() ;)
Make it clear that TLS_WANT_READ must be returned if underlying
SSL/TLS lib does not indicate I/O direction. This is because
SocketCore sets wantRead_ = true when TLS_WANT_READ is returned and
otherwise sets wantWrite_ = true. We only want to set wantWrite_ =
true iff we have some pending data to send.
This is because on some platforms (gnutls on cygwin for example),
library always fails for this function and getting ERROR every time
aria2c invoked is too hard.
The IPv6 asynchronous name resolver is enabled if the host has at
least one interface with IPv6 address configured (the loopback address
will not be counted), which is roughly the same behaviour of the
standard getaddrinfo(3). To disable IPv6 asynchronous name resolver,
use --disable-ipv6.
Now dedicated ConnectCommand handles connection establishment. It
checks whether connection is established or not. It also handles
backup connection. The next Command creation is abstracted using
ControlChain struct template.
