This commit will result in SSL cert failures causing failovers to other
transports, even to itself, instead of shutting the session down. This
will result in repeated calls back to the endpoint, every "retry wait"
seconds, and will continue to do so until the session expires, or the
SSL verification works.
Be warned, this can be noisy in your console if you haven't configured
things properly. The result is a lot of callbacks over the life of the
session.
The original implementation assumed that the UUIDs were coming through a strings, but this was changed at some point to use the 16-byte UUID format straight out of MSF.
This was causing issues when UUIDs had null bytes in them because the UUID was being truncated and the result was that UUIDs that were being parsed in MSF were too small, resulting in exceptions.
Transport hopping checks for prev/next weren't right. Also, moving from TCP comms was resulting failure due to the fact that it's close to impossible to get Windows to flush the buffer to MSF prior to terminating the socket without doing all kinds of horrible stuff to the socket options (which would ultimately bloat the stagers).
Instead we rely on MSf to clean things up.
Migration now works again, and supports all the transports while migrating as well. At the moment we don't have the ability to take extensions across as well, though that might come when we have fixed up the issues with stageless meterpreter.
Creation of transports for switching is done a little differently now. But the transports do cycle correctly now when things fail, each with their respective retry times.
The mechanism used for validation of the SSL cert string was the same as for many of the other global replacement options. However, the string value that was used for checking was also the same. The result was that the patch mechanism wasn't patching the right instance of the string.
DERP!
Why this hit stageless only I'm really not sure.
Updated the code so that the TCP stuff is moved into its own file and doesn't pollute the main server file with stuff that is specific to TCP transports.
Updated the winhttp functionality in the same way so that functionality is properly segregated.
Modified the global parameters so that they're part of a structure that can be passed around.
Added a stack of documnetation as well.
Instead of basing everything on URLs, the transport hopping now actually supports the creation of a whole new transport on the fly. The transport instance is stored in the remote as a "next transport" pointer.
This better facilitates the notion of being able to set all of the parameters on the transport when doing the switch, and is a step closer to being able to support chains of transports.
