Alexander Hansen Færøy authored 6 years ago and Nick Mathewson committed 6 years ago

This patch adds a new Process subsystem for running external programs in
the background of Tor. The design is focused around a new type named
`process_t` which have an API that allows the developer to easily write
code that interacts with the given child process. These interactions
includes:

- Easy API for writing output to the child process's standard input
  handle.
- Receive callbacks whenever the child has output on either its standard
  output or standard error handles.
- Receive callback when the child process terminates.

We also support two different "protocols" for handling output from the
child process. The default protocol is the "line" protocol where the
process output callbacks will be invoked only when there is complete
lines (either "\r\n" or "\n" terminated). We also support the "raw"
protocol where the read callbacks will get whatever the operating system
delivered to us in a single read operation.

This patch does not include any operating system backends, but the Unix
and Windows backends will be included in separate commits.

See: https://bugs.torproject.org/28179

See: https://bugs.torproject.org/28179

This patch adds two new functions: buf_flush_to_pipe() and
buf_read_from_pipe(), which makes use of our new buf_flush_to_fd() and
buf_read_from_fd() functions.

See: https://bugs.torproject.org/28179

This patch refactors buf_read_from_socket() into buf_read_from_fd(), and
creates a specialized function for buf_read_from_socket(), which uses
buf_read_from_fd().

See: https://bugs.torproject.org/28179

This patch refactors buf_flush_to_socket() into buf_flush_to_fd() and
creates a specialization function for buf_flush_to_socket() that makes
use of buf_flush_to_fd().

See: https://bugs.torproject.org/28179

See: https://bugs.torproject.org/28179

See: https://bugs.torproject.org/28179

See: https://bugs.torproject.org/28179

This patch explicitly specifies the path to our OpenSSL dependency and
disables the installation of an external OpenSSL version and instead
uses the OpenSSL version available from the MinGW environments.

See: https://bugs.torproject.org/28574

The DormantClientTimeout option controls how long Tor will wait before
going dormant.  It also provides a way to disable the feature by setting
DormantClientTimeout to e.g. "50 years".

The DormantTimeoutDisabledByIdleStreams option controls whether open but
inactive streams count as "client activity".  To implement it, I had to
make it so that reading or writing on a client stream *always* counts as
activity.

Closes ticket 28429.

Taylor R Campbell authored 6 years ago and David Goulet committed 6 years ago

Fixes #28562.

While here, put the argument count test and usage message _before_ we
attempt to read from sys.argv.

After we clear the protover map for getting full, we need to
re-create it, since we are about to use it.

This is a bugfix for bug 28558. It is a bugfix for the code from
ticket 27225, which is not in any released Tor.  Found by Google
OSS-Fuzz, as issue 11475.

Reset the added bootstrap tracking state introduced by ticket 27169.
Fixes bug 28524; bugfix on 0.3.5.1-alpha.

Alexander Hansen Færøy authored 6 years ago and Nick Mathewson committed 6 years ago

To succesful compile tor-print-ed-signing-cert.exe on Windows we
sometimes need to include the @TOR_LIB_GDI@ library.

See: https://bugs.torproject.org/28485