Preprocessor for HTTPS and SOCKS v4/4a/5 proxies. The filter classifies transmitted
content and detects proxy type automatically.
OT_HTTPS_PROXY_REQUEST - HTTP CONNECT request to HTTPS proxy
OT_SOCKS4_REQUEST - request to SOCKS v4/4a proxy
OT_SOCKS5_AUTH_REQUEST - initial request to SOCKS5 proxy for negotiating authentication
OT_SOCKS5_AUTH_UNPW - authentication request to SOCKS5 proxy with user name and
OT_SOCKS5_REQUEST - request to SOCKS5 proxy containing a command with parameters
Indicates object parts:
The objects contain a buffer in one stream.
When FF_READ_ONLY_OUT flag is not specified for FT_PROXY filter, it is possible
to modify requests before posting to destination (for example to change the address
of remote server in proxy request). However it is possible only in case when outgoing packet contains the full proxy request. If a filtered application sends some request
in several packets, FT_PROXY switches to read-only mode to avoid blocking the other
traffic due to false positive. The indicated objects have read-only flag in this