When some channels are filtered, some misalignement of channel ids could happen.
This patch keeps track of the back and front channel ids to correctly identify a
channel and send packets with the correct channel id.
* Fixed format strings to match arguments
Reviewed and replaced all %d specifiers to match proper type
* Added proxy dynamic channel command type to log messages.
This big patch fixes fragmentation handling in the dynamic channel. We used to
have a single state to handle fragmentation at the main dynamic channel level, but
in fact packets can be fragmented per sub channel. So we have to maintain a fragmentation
state per sub channel, this involve treating dynamic and static channels differentely
(so the size of the patch that has to implement state tracking per dynamic channels).
This adds a User, Domain and Password parameter in the Target section of the configuration
to specify and use a fixed backend user, domain or password (overriding the one
passed by the front user).
The rework introduce a stateful dynamic channel treatment, so that we can take early decisions
for data packet (dropping all the current packet or pass it), but also reassemble important
packets like channel creation.
This PR introduces per channel context so that we can speed up operations like
retrieving the channel name from its id, or knowing what shall be done for a
packet (no config ACL recomputation at each packet).
* Fix pf_server_new: pass own copy of proxyConfig
The lifecycle of proxyConfig passed to pf_server_new is unknown,
so pass proxyServer->config copy to modules.
* Early free parsed proxyConfig
* Split out proxy headers and moved to public API to allow external
modules to be built.
* Split proxy into proxy library and proxy binary. The library
can be used by other applications and provides a simple API
* Improved channel passthrough, now all channels including dynamic
channels work.
* Extended module API to hook more events, improved module samples
* Cleaned up proxy code, removed global static variables used,
added WINPR_ASSERT
Proxy server might receive input updates while client side being
redirected (and reset), then a heap-after-free might occur. To solve
this, we register server input/update callbacks only after client is
fully activated.
* Fix some missing argument checks for function pointer implementations
* Fix broken return value check for client->SendChannelData
* Updated const correctness for function pointer implementations
