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globus_ftp_control_server.c File Reference

FTP Server-side Control Connection Management. More...

Functions

Detailed Description

FTP Server-side Control Connection Management.

Function Documentation

globus_result_t
globus_ftp_control_server_handle_init (		  
       globus_ftp_control_server_t *       handle ) 
 

Initialize a globus ftp server handle.

This function will set up (i.e. intialize all mutexes and variables) a globus ftp server handle. It will also enter the handle in a list used by the module activation/deactivation functions.

Parameters:
handle  The handle to initialize.
Returns:
  • GLOBUS_SUCCESS
  • invalid handle

globus_result_t
globus_ftp_control_server_handle_destroy (		  
       globus_ftp_control_server_t *       handle ) 
 

Destroy a globus ftp server handle.

This function will free up all dynamicly allocated memory associated with a given globus ftp server handle. It will also remove the handle from a list used by the module activation/deactivation functions. This function should only be called after a call to globus_ftp_control_server_stop.

Parameters:
handle  The handle to destory.
Returns:
  • success
  • invalid handle
  • handle is still in listening state

globus_result_t
globus_ftp_control_server_listen (		  
       globus_ftp_control_server_t *       server_handle,
       unsigned short *       port,
       globus_ftp_control_server_callback_t       callback,
       void *       callback_arg ) 
 

Start listening on a given port for FTP client connections.

This function starts the listening on *port for connections from ftp clients. When a connection request is made callback is called and passed callback_arg. Upon return from this function the server_handle structure is initialized.

Parameters:
server_handle  A pointer to a initialized server handle.
port  A pointer to the port to listen on. If the initial value is zero it will be set to the default value.
callback  The callback function called when connection requests are made.
callback_arg  The user argument passed to the callback function when connection requests are made.
Note:
I'm not providing any mechanism for making sure that this function is only called once. Is this needed?

globus_result_t
globus_ftp_control_command_init (		  
       globus_ftp_control_command_t *       command,
       char *       raw_command,
       globus_ftp_control_auth_info_t *       auth_info ) 
 

Initialize a command structure.

This function initializes a command structure based on a null terminated string representing one line of input from the client. The command structure is used as a convience to determine what command the client issued. This function parses a command string sent by a client and populates the command argument appropriatly. In the GSSAPI case it will also decode and unwrap the command before parsing it.

Parameters:
command  A pointer to the command structure to be initialized
raw_command  A null terminated line of client input. Should contain one command.
auth_info  Authentication information needed for unwrapping a command

globus_result_t
globus_ftp_control_command_destroy (		  
       globus_ftp_control_command_t *       command ) 
 

Destroy a command structure.

This function frees up the memory allocated to the command argument.

Parameters:
command  The command structure whose associated memory is to be freed

globus_result_t
globus_ftp_control_command_copy (		  
       globus_ftp_control_command_t *       dest,
       globus_ftp_control_command_t *       src ) 
 

Creates a copy of a command structure.

This function should be called when the user needs to make a copy of a command structure.

Parameters:
dest  The area of memory that the command structure is copied to.
src  The command structure to be copied.

globus_result_t
globus_ftp_control_server_stop (		  
       globus_ftp_control_server_t *       listener,
       globus_ftp_control_server_callback_t       callback,
       void *       callback_arg ) 
 

Stop the GSIFTP server from listening for client connections.

This function stops listening on the given listener object for client connections. All existing client connections are left open.

Parameters:
listener  the globus_ftp_control_server_t object that should no longer listen for connections.
callback  The user callback that will be called when the server structure is no longer listening.
callback  The user argument that is passed into callback.

globus_result_t
globus_ftp_control_server_accept (		  
       globus_ftp_control_server_t *       listener,
       globus_ftp_control_handle_t *       handle,
       globus_ftp_control_callback_t       callback,
       void *       callback_arg ) 
 

Accept a client connection request.

This function is called to accept a connection request from a client.

When the listen callback is called (see globus_ftp_control_server_listen) a client has requested a connection. This function must be called to accept that user connection request. Security requirements can be set via the sec_requirements attribute. When the given security requirements are either accepted or rejected the callback function is called.

Parameters:
listener  The server object that received the connection request.
handle  The control connection object. This structure will be populated and passed to the callback when the client is authorized. This structure represents the control connection between the server and client. It will be used to read commands from the client and send responses to the client.]
sec_requirements  This structure represents the security requirements that the user has for a given connection. For example GSIFTP user name, password, and account.
callback  The function called when the client authorization has been accepted or rejected.
callback_arg  The user argument passed to the callback.
Note:
It is up to the user of this function to send the reply to the last command of the authentication sequence.
This functions assumes the the server and control handles have been initialized prior to calling this function.

globus_result_t
globus_ftp_control_read_commands (		  
       globus_ftp_control_handle_t *       handle,
       globus_ftp_control_command_callback_t       callback,
       void *       callback_arg ) 
 

Begin reading GSIFTP commands on a given control connection.

This function begins reading control commands on a globus_ftp_control_handle_t. When a command is read the callback function is called.

Parameters:
handle  The control connection handle that commands will be read from. Prior to calling this the function globus_ftp_control_handle_t must be populated via a call to globus_ftp_control_accept().
callback  The user callback that will be called when commands are read.
callback_arg  The user argument passed to the callback.

globus_result_t
globus_ftp_control_send_response (		  
       globus_ftp_control_handle_t *       handle,
       const char *       respspec,
       globus_ftp_control_callback_t       callback,
       void *       callback_arg,
       ...       ) 
 

Send a response to the GSIFTP client.

This function sends a GSIFTP formatted response to the client. When a command callback is received the user calls this function to respond to the clients request.

Parameters:
handle  The control connection to send the response across.
respspec  A formated string representing the users response.
callback  The user callback that will be called when the response has been sent.
callback_arg  The user argument passed to the callback.

Variable Documentation

const char* globus_i_ftp_server_220_reply
 

Initial value:

"220 Service ready for new user.\r\n"

const char* globus_i_ftp_server_235_reply
 

Initial value:

"235 GSSAPI Authentication succeeded\r\n"

const char* globus_i_ftp_server_331_reply
 

Initial value:

"331 User name okay, need password.\r\n"

const char* globus_i_ftp_server_332_reply
 

Initial value:

"332 Need account for login.\r\n"

const char* globus_i_ftp_server_334_reply
 

Initial value:

"334 Using authentication type GSSAPI; ADAT must follow.\r\n"

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