This change adds the `logging show` and `logging set` commands to the
command processor module. This allows setting the log levels of the
individual modules via the socket.
Prior to this change, it was possible for a malicious client to send a
buffer of 1024 NUL bytes, which would cause the parser to overflow the
argv array and eventually crash the program.
This change makes the length of the argv array the same as the length of
the recv buffer, which means that even an input of all 0 bytes would not
cause any issues. The client would just get a bunch of ERR responses in
return.
The command allows the client to retrieve individual parameters from the
configuration. This follows a similar syntax to the 'config set'
command, with the client supplying the section and key, and if there is
a matching entry in the configuration, it will return the corresponding
value.
This change removes the unnecessary response length field from the
output buffer. It was added to check for possible issues in the
communication between client and server, but is not needed anymore. This
also makes the communication protocol standardized between client and
server.
This change allows setting the configuration from the socket. It behaves
similar to the override, and requires the client to send the section,
key and value, and responds with an OK or error value.
This change adds the generic command parsing logic, as well as the
response for the following commands:
* config load <file>
* config reload
* config save
* config dump <file>
This change adds the logic to read a packet from the socket, accept
connections from clients, and close connections from clients that have
hung up. This commit does not yet have support for parsing and handling
the commands, and simply echoes the request back to the client.
nirenjan