globus_ftp_control_client - Online Linux Manual PageSection : 3
Updated : Tue Jan 26 2021
Source : Version 9.6
Note : globus_ftp_control

NAMEglobus_ftp_control_client − GridFTP Control Client
 − Control Client​.

SYNOPSIS

Functionsglobus_result_t globus_ftp_control_handle_init (globus_ftp_control_handle_t *handle)
Initialize a globus ftp handle​.
globus_result_t globus_ftp_control_handle_destroy (globus_ftp_control_handle_t *handle)
Destroy a globus ftp handle​.
globus_result_t globus_ftp_control_connect (globus_ftp_control_handle_t *handle, char *host, unsigned short port, globus_ftp_control_response_callback_t callback, void *callback_arg)
Create a new control connection to an FTP server​.
globus_result_t globus_ftp_control_response_destroy (globus_ftp_control_response_t *response)
Free the memory associated with a response​.
globus_result_t globus_ftp_control_response_copy (globus_ftp_control_response_t *src, globus_ftp_control_response_t *dest)
Copy a response structure​.
globus_result_t globus_ftp_control_authenticate (globus_ftp_control_handle_t *handle, globus_ftp_control_auth_info_t *auth_info, globus_bool_t use_auth, globus_ftp_control_response_callback_t callback, void *callback_arg)
Authenticate the user to the FTP server​.
globus_result_t globus_ftp_control_authenticate_ex (globus_ftp_control_handle_t *handle, globus_ftp_control_auth_info_t *auth_info, globus_bool_t use_auth, globus_ftp_control_response_callback_t callback, void *callback_arg)
Authenticate the user to the FTP server​.
globus_result_t globus_ftp_control_send_command (globus_ftp_control_handle_t *handle, const char *cmdspec, globus_ftp_control_response_callback_t callback, void *callback_arg,​.​.​.)
Send an FTP protocol command​.
globus_result_t globus_ftp_control_abort (globus_ftp_control_handle_t *handle, globus_ftp_control_response_callback_t callback, void *callback_arg)
Send a GridFTP ABORT​.
globus_result_t globus_ftp_control_quit (globus_ftp_control_handle_t *handle, globus_ftp_control_response_callback_t callback, void *callback_arg)
Send a GridFTP QUIT​.
globus_result_t globus_ftp_control_force_close (globus_ftp_control_handle_t *handle, globus_ftp_control_response_callback_t callback, void *callback_arg)
Force a control connection to close​.
globus_result_t globus_ftp_control_auth_info_init (globus_ftp_control_auth_info_t *auth_info, gss_cred_id_t credential_handle, globus_bool_t encrypt, char *user, char *password, char *account, char *subject)
Initialize authentication information​.
int globus_ftp_control_auth_info_compare (globus_ftp_control_auth_info_t *auth_info_1, globus_ftp_control_auth_info_t *auth_info_2)
Compare authentication information​.
globus_result_t globus_ftp_control_client_get_connection_info_ex (globus_ftp_control_handle_t *handle, globus_ftp_control_host_port_t *local_info, globus_ftp_control_host_port_t *remote_info)
Not documented yet​.
globus_result_t globus_ftp_control_ipv6_allow (globus_ftp_control_handle_t *handle, globus_bool_t allow)
Not documented yet​.

Detailed DescriptionControl Client​.

Function Documentation

globus_result_t globus_ftp_control_abort (globus_ftp_control_handle_t * handle, globus_ftp_control_response_callback_t callback, void * callback_arg)Send a GridFTP ABORT​. This function is used to send the ABORT message to the FTP server​. The ABORT message is sent out-of-band, and terminates any current data transfer in progress​. As a result of the ABORT, the data channels used by this control channel will be closed​. The data command callback will be issued with either a completion reply, or a transfer aborted reply​. The ABORT callback will also be invoked, with the server's response to the abort command​. Any attempts to register buffers for read or write after an ABORT has been sent will fail with a 'no transfer in progress' error​. Parameters handle A pointer to a GridFTP control handle​. The ABORT command is issued to the server over the control channel associated with this handle​.
callback The function to be called once the authentication process is complete or when an error occurs​.
callback_arg User supplied argument to the callback function
Returns • Success • Null handle • No transfer in progress Callback errors: • success • protocol error • eof Expected callback response values: • 226 Abort successful​. • 500 Syntax error, command unrecognized​. Note The server may send other responses​.

int globus_ftp_control_auth_info_compare (globus_ftp_control_auth_info_t * auth_info_1, globus_ftp_control_auth_info_t * auth_info_2)Compare authentication information​. This is helper function compares two authentication information structures and return zero if the two structures are deemed equal and a non-zero value otherwise​. Parameters auth_info_1 The first authentication structure
auth_info_2 The second authentication structure
Returns • 0 if the structures are equal • !0 if the structures differ or an error occurred

globus_result_t globus_ftp_control_auth_info_init (globus_ftp_control_auth_info_t * auth_info, gss_cred_id_t credential_handle, globus_bool_t encrypt, char * user, char * password, char * account, char * subject)Initialize authentication information​. This is helper function initializes a authentication information structure with the values contained in the second to fifth arguments, which may be GLOBUS_NULL​. No memory is allocated in this function​. Parameters auth_info The authentication structure to initialize​.
credential_handle The credential to use for authentication​. This may be GSS_C_NO_CREDENTIAL to use the user's default credential​.
encrypt Boolean whether or not to encrypt the control channel for this handle​.
user The user name
password The password for the user name
account The account for the user name/password
subject The GSSAPI subject name
Returns • Error object • GLOBUS_SUCCESS

globus_result_t globus_ftp_control_authenticate (globus_ftp_control_handle_t * handle, globus_ftp_control_auth_info_t * auth_info, globus_bool_t use_auth, globus_ftp_control_response_callback_t callback, void * callback_arg)Authenticate the user to the FTP server​. This will perform the authentication handshake with the FTP server​. Depending on which parameters are non-NULL, the authentication may involve GSSAPI credentials, a username, a password, and an account name​. Note Do we want to add attribute arguments for: • specifying type of delegation • gsswrap control messages for integrity or confidentiality Parameters handle A pointer to a unauthenticated GridFTP control handle​. In the case of GSS authentication the GSS security context is stored in this structure​.
auth_info This structure is used to pass the following information:
• user The user's name for login purposes​. If this string is 'anonymous', 'ftp', GLOBUS_NULL or ':globus-mapping:' then the password argument is optional​. If this string is GLOBUS_NULL or ':globus-mapping:' and gss_auth is true then the users login is looked by the FTP server host​. • password The password for the above user argument​. If the user argument is 'anonymous' or 'ftp' or if gss_auth is true this string may be GLOBUS_NULL​.
• account This parameter is optional​. If not used it should be set to GLOBUS_NULL​. It might be needed by firewalls​. • auth_gssapi_subject The GSSAPI subject name of the server you are connecting to​. If this is GLOBUS_NULL, and the gss_auth parameter is set to GLOBUS_TRUE, then the name will default to the host name​.
use_auth If set to GLOBUS_TRUE the above argument indicates that GSS authentication should be used, otherwise cleartext user/password authentication is used​.
callback The function to be called once the authentication process is complete or when an error occurs​.
callback_arg User supplied argument to the callback function
Returns • success • Null handle • Invalid handle • Handle already authenticated Callback errors: • success • authentication failed • protocol error • eof Expected callback response values: • 230 User logged in, proceed​. • 232 User logged in, authorized by security data exchange​. • 234 Security data exchange complete​. • 331 User name okay, need password​. • 332 Need account for login​. • 336 Username okay, need password​. Challenge is '​.​.​.​.' • 431 Need some unavailable resource to process security​. • 500 Syntax error, command unrecognized​. • 530 Not logged in​. Note The server may send other responses​. The function globus_ftp_control_authenticate_ex() is identical except that the auth_info->req_flags is used​. If delegation flags or any flags other than GSS_C_MUTUAL_FLAG and GSS_C_CONF_FLAG are desired, they must be set explicitly​. It is the caller's responsibility to ensure that req_flags only contains valid flags​.

globus_result_t globus_ftp_control_authenticate_ex (globus_ftp_control_handle_t * handle, globus_ftp_control_auth_info_t * auth_info, globus_bool_t use_auth, globus_ftp_control_response_callback_t callback, void * callback_arg)Authenticate the user to the FTP server​. This will perform the authentication handshake with the FTP server​. Depending on which parameters are non-NULL, the authentication may involve GSSAPI credentials, a username, a password, and an account name​. Note Do we want to add attribute arguments for: • specifying type of delegation • gsswrap control messages for integrity or confidentiality Parameters handle A pointer to a unauthenticated GridFTP control handle​. In the case of GSS authentication the GSS security context is stored in this structure​.
auth_info This structure is used to pass the following information:
• user The user's name for login purposes​. If this string is 'anonymous', 'ftp', GLOBUS_NULL or ':globus-mapping:' then the password argument is optional​. If this string is GLOBUS_NULL or ':globus-mapping:' and gss_auth is true then the users login is looked by the FTP server host​. • password The password for the above user argument​. If the user argument is 'anonymous' or 'ftp' or if gss_auth is true this string may be GLOBUS_NULL​.
• account This parameter is optional​. If not used it should be set to GLOBUS_NULL​. It might be needed by firewalls​. • auth_gssapi_subject The GSSAPI subject name of the server you are connecting to​. If this is GLOBUS_NULL, and the gss_auth parameter is set to GLOBUS_TRUE, then the name will default to the host name​.
use_auth If set to GLOBUS_TRUE the above argument indicates that GSS authentication should be used, otherwise cleartext user/password authentication is used​.
callback The function to be called once the authentication process is complete or when an error occurs​.
callback_arg User supplied argument to the callback function
Returns • success • Null handle • Invalid handle • Handle already authenticated Callback errors: • success • authentication failed • protocol error • eof Expected callback response values: • 230 User logged in, proceed​. • 232 User logged in, authorized by security data exchange​. • 234 Security data exchange complete​. • 331 User name okay, need password​. • 332 Need account for login​. • 336 Username okay, need password​. Challenge is '​.​.​.​.' • 431 Need some unavailable resource to process security​. • 500 Syntax error, command unrecognized​. • 530 Not logged in​. Note The server may send other responses​. The function globus_ftp_control_authenticate_ex() is identical except that the auth_info->req_flags is used​. If delegation flags or any flags other than GSS_C_MUTUAL_FLAG and GSS_C_CONF_FLAG are desired, they must be set explicitly​. It is the caller's responsibility to ensure that req_flags only contains valid flags​.

globus_result_t globus_ftp_control_connect (globus_ftp_control_handle_t * handle, char * host, unsigned short port, globus_ftp_control_response_callback_t callback, void * callback_arg)Create a new control connection to an FTP server​. This function is used to initiate an FTP control connection​. It creates the socket to the FTP server​. When the connection is made to the server, and the server's identification string is received, the callback function will be invoked​. Parameters handle A pointer to a initialized FTP control handle​. This handle will be used for all subsequent FTP control operations​.
host The hostname of the FTP server​.
port The TCP port number of the FTP server​.
callback A function to be called once the connection to the server is established, and a response has been read​.
callback_arg Parameter to the callback function​.
Returns • success • Null handle • Null host • Illegal port number • Null callback • Cannot resolve hostname • Cannot create socket Callback errors: • success • connection refused • protocol error • eof Expected callback response values: • 120 Service ready in nnn minutes​. • 220 Service ready for new user​. • 421 Service not available, closing control connection​. • 500 Syntax error, command unrecognized​. Note The server may send other responses​.

globus_result_t globus_ftp_control_force_close (globus_ftp_control_handle_t * handle, globus_ftp_control_response_callback_t callback, void * callback_arg)Force a control connection to close​. Force a close of the control connection without waiting for outstanding commands to complete and without sending QUIT​. This function is used to close the control channel to the FTP server​. Once the final response callback passed to this function is invoked, the control handle can no longer be used for any GridFTP control operations​. Note Since this function waits until all other callbacks are completed before calling it's own callback it may not be called in a blocking fashion from another callback​. Parameters handle A pointer to a GridFTP control handle​. The quit message is issued to the server over the control channel associated with this handle​.
callback The function to be called once the authentication process is complete or when an error occurs​.
callback_arg User supplied argument to the callback function
Returns • Success • Null handle Callback errors: • success • failure Expected callback response values: • GLOBUS_NULL

globus_result_t globus_ftp_control_handle_destroy (globus_ftp_control_handle_t * handle)Destroy a globus ftp handle​. This function will free up all dynamically allocated memory associated with a given globus ftp 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 either globus_ftp_control_force_close or globus_ftp_control_quit​.
Parameters handle The handle to destroy​. Returns • success • invalid handle • handle is still in connected state

globus_result_t globus_ftp_control_handle_init (globus_ftp_control_handle_t * handle)Initialize a globus ftp handle​. This function will set up (i​.e​. initialize all mutexes and variables) a globus ftp 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 • error object

globus_result_t globus_ftp_control_quit (globus_ftp_control_handle_t * handle, globus_ftp_control_response_callback_t callback, void * callback_arg)Send a GridFTP QUIT​. This function is used to close the control channel to the FTP server​. There should be no transfer commands in progress when this is called​. Once the final response callback passed to this function is invoked, the control handle can no longer be used for any GridFTP control operations​. Note Need to further define behavior for when a QUIT happens during a transfer or command is in progress​. Since this function waits until all other callbacks are completed before calling it's own callback it may not be called in a blocking fashion from another callback​. Parameters handle A pointer to a GridFTP control handle​. The quit message is issued to the server over the control channel associated with this handle​.
callback The function to be called once the authentication process is complete or when an error occurs​.
callback_arg User supplied argument to the callback function
Returns • Success • Null handle • Command in progress Callback errors: • success • protocol error • eof Expected callback response values: • 221 Service closing control connection​. • 500 Syntax error, command unrecognized​. Note The server may send other responses​.

globus_result_t globus_ftp_control_response_copy (globus_ftp_control_response_t * src, globus_ftp_control_response_t * dest)Copy a response structure​. This is a helper function which copies one response structure to another​. Parameters src This parameter indicates the response structure to copy
dest This parameter specifies the target response structure
Returns • Error object • GLOBUS_SUCCESS

globus_result_t globus_ftp_control_response_destroy (globus_ftp_control_response_t * response)Free the memory associated with a response​. This is a helper function which frees the memory associated with a response structure​. Parameters response This parameter indicates the response structure to destroy Returns • Error object • GLOBUS_SUCCESS

globus_result_t globus_ftp_control_send_command (globus_ftp_control_handle_t * handle, const char * cmdspec, globus_ftp_control_response_callback_t callback, void * callback_arg, ​.​.​.)Send an FTP protocol command​. This function is used to send an FTP command, and register a handler to receive the FTP reply (or replies, if an intermediate one is sent)​. When the control channel is gss authenticated, the message and the reply will be automatically gss wrapped/unwrapped​. Parameters handle A pointer to a GridFTP control handle​. The command described by the cmdspec is issued to the server over the control channel associated with this handle​.
cmdspec A printf-style format string containing the text of the command to send to the server​. The optional parameters to the format string are passed after the callback_arg in the function invocation​.
callback The function to be called once the authentication process is complete or when an error occurs​.
callback_arg User supplied argument to the callback function
​.​.​. Parameters which will be substituted into the % escapes in the cmdspec string​.
Returns • Success • Null handle • Command already in progress Callback errors: • success • protocol error • eof Expected callback response values: Any defined in RFC 959, 2228, 2389, draft-ietf-ftpext-mlst-10, or the protocol extensions document​.

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