| libssh
    0.7.5
    | 
Callback which can be replaced in libssh. More...
| Data Structures | |
| struct | ssh_callbacks | 
| The structure to replace libssh functions with appropriate callbacks.  More... | |
| struct | ssh_server_callbacks | 
| This structure can be used to implement a libssh server, with appropriate callbacks.  More... | |
| struct | ssh_socket_callbacks | 
| These are the callbacks exported by the socket structure They are called by the socket module when a socket event appears.  More... | |
| Macros | |
| #define | ssh_callbacks_init(p) | 
| Initializes an ssh_callbacks_struct A call to this macro is mandatory when you have set a new ssh_callback_struct structure.  More... | |
| #define | SSH_PACKET_CALLBACK(name) int name (ssh_session session, uint8_t type, ssh_buffer packet, void *user) | 
| This macro declares a packet callback handler.  More... | |
| #define | SSH_PACKET_NOT_USED 2 | 
| Packet was not used and should be passed to any other callback available. | |
| #define | SSH_PACKET_USED 1 | 
| return values for a ssh_packet_callback  More... | |
| Typedefs | |
| typedef int(* | ssh_auth_gssapi_mic_callback) (ssh_session session, const char *user, const char *principal, void *userdata) | 
| SSH authentication callback.  More... | |
| typedef int(* | ssh_auth_none_callback) (ssh_session session, const char *user, void *userdata) | 
| SSH authentication callback.  More... | |
| typedef int(* | ssh_auth_password_callback) (ssh_session session, const char *user, const char *password, void *userdata) | 
| These are callbacks used specifically in SSH servers.  More... | |
| typedef int(* | ssh_auth_pubkey_callback) (ssh_session session, const char *user, struct ssh_key_struct *pubkey, char signature_state, void *userdata) | 
| SSH authentication callback.  More... | |
| typedef void(* | ssh_channel_auth_agent_req_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
| SSH auth-agent-request from the client.  More... | |
| typedef void(* | ssh_channel_close_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
| SSH channel close callback.  More... | |
| typedef int(* | ssh_channel_data_callback) (ssh_session session, ssh_channel channel, void *data, uint32_t len, int is_stderr, void *userdata) | 
| SSH channel data callback.  More... | |
| typedef int(* | ssh_channel_env_request_callback) (ssh_session session, ssh_channel channel, const char *env_name, const char *env_value, void *userdata) | 
| SSH channel environment request from a client.  More... | |
| typedef void(* | ssh_channel_eof_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
| SSH channel eof callback.  More... | |
| typedef int(* | ssh_channel_exec_request_callback) (ssh_session session, ssh_channel channel, const char *command, void *userdata) | 
| SSH channel Exec request from a client.  More... | |
| typedef void(* | ssh_channel_exit_signal_callback) (ssh_session session, ssh_channel channel, const char *signal, int core, const char *errmsg, const char *lang, void *userdata) | 
| SSH channel exit signal callback.  More... | |
| typedef void(* | ssh_channel_exit_status_callback) (ssh_session session, ssh_channel channel, int exit_status, void *userdata) | 
| SSH channel exit status callback.  More... | |
| typedef ssh_channel(* | ssh_channel_open_request_session_callback) (ssh_session session, void *userdata) | 
| Handles an SSH new channel open session request.  More... | |
| typedef ssh_channel(* | ssh_channel_open_request_x11_callback) (ssh_session session, const char *originator_address, int originator_port, void *userdata) | 
| Handles an SSH new channel open X11 request.  More... | |
| typedef int(* | ssh_channel_pty_request_callback) (ssh_session session, ssh_channel channel, const char *term, int width, int height, int pxwidth, int pwheight, void *userdata) | 
| SSH channel PTY request from a client.  More... | |
| typedef int(* | ssh_channel_pty_window_change_callback) (ssh_session session, ssh_channel channel, int width, int height, int pxwidth, int pwheight, void *userdata) | 
| SSH channel PTY windows change (terminal size) from a client.  More... | |
| typedef int(* | ssh_channel_shell_request_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
| SSH channel Shell request from a client.  More... | |
| typedef void(* | ssh_channel_signal_callback) (ssh_session session, ssh_channel channel, const char *signal, void *userdata) | 
| SSH channel signal callback.  More... | |
| typedef int(* | ssh_channel_subsystem_request_callback) (ssh_session session, ssh_channel channel, const char *subsystem, void *userdata) | 
| SSH channel subsystem request from a client.  More... | |
| typedef void(* | ssh_channel_x11_req_callback) (ssh_session session, ssh_channel channel, int single_connection, const char *auth_protocol, const char *auth_cookie, uint32_t screen_number, void *userdata) | 
| SSH X11 request from the client.  More... | |
| typedef void(* | ssh_global_request_callback) (ssh_session session, ssh_message message, void *userdata) | 
| SSH global request callback.  More... | |
| typedef void(* | ssh_log_callback) (ssh_session session, int priority, const char *message, void *userdata) | 
| SSH log callback.  More... | |
| typedef void(* | ssh_logging_callback) (int priority, const char *function, const char *buffer, void *userdata) | 
| SSH log callback.  More... | |
| typedef int(* | ssh_packet_callback) (ssh_session session, uint8_t type, ssh_buffer packet, void *user) | 
| Prototype for a packet callback, to be called when a new packet arrives.  More... | |
| typedef int(* | ssh_service_request_callback) (ssh_session session, const char *service, void *userdata) | 
| Handles an SSH service request.  More... | |
| typedef void(* | ssh_status_callback) (ssh_session session, float status, void *userdata) | 
| SSH Connection status callback.  More... | |
| Functions | |
| LIBSSH_API int | ssh_set_callbacks (ssh_session session, ssh_callbacks cb) | 
| Set the session callback functions.  More... | |
| LIBSSH_API int | ssh_set_channel_callbacks (ssh_channel channel, ssh_channel_callbacks cb) | 
| Set the channel callback functions.  More... | |
| LIBSSH_API int | ssh_set_server_callbacks (ssh_session session, ssh_server_callbacks cb) | 
| Set the session server callback functions.  More... | |
Callback which can be replaced in libssh.
| #define ssh_callbacks_init | ( | p | ) | 
Initializes an ssh_callbacks_struct A call to this macro is mandatory when you have set a new ssh_callback_struct structure.
Its goal is to maintain the binary compatibility with future versions of libssh as the structure evolves with time.
| #define SSH_PACKET_CALLBACK | ( | name | ) | int name (ssh_session session, uint8_t type, ssh_buffer packet, void *user) | 
This macro declares a packet callback handler.
Referenced by ssh_channel_set_blocking(), and ssh_message_free().
| #define SSH_PACKET_USED 1 | 
return values for a ssh_packet_callback
Packet was used and should not be parsed by another callback
| typedef int(* ssh_auth_gssapi_mic_callback) (ssh_session session, const char *user, const char *principal, void *userdata) | 
SSH authentication callback.
Tries to authenticates user with the "gssapi-with-mic" method
| session | Current session handler | 
| user | Username of the user (can be spoofed) | 
| principal | Authenticated principal of the user, including realm. | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_auth_none_callback) (ssh_session session, const char *user, void *userdata) | 
SSH authentication callback.
Tries to authenticates user with the "none" method which is anonymous or passwordless.
| session | Current session handler | 
| user | User that wants to authenticate | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_auth_password_callback) (ssh_session session, const char *user, const char *password, void *userdata) | 
These are callbacks used specifically in SSH servers.
SSH authentication callback.
| session | Current session handler | 
| user | User that wants to authenticate | 
| password | Password used for authentication | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_auth_pubkey_callback) (ssh_session session, const char *user, struct ssh_key_struct *pubkey, char signature_state, void *userdata) | 
SSH authentication callback.
| session | Current session handler | 
| user | User that wants to authenticate | 
| pubkey | public key used for authentication | 
| signature_state | SSH_PUBLICKEY_STATE_NONE if the key is not signed (simple public key probe), SSH_PUBLICKEY_STATE_VALID if the signature is valid. Others values should be replied with a SSH_AUTH_DENIED. | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_auth_agent_req_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
SSH auth-agent-request from the client.
This request is sent by a client when agent forwarding is available. Server is free to ignore this callback, no answer is expected.
| channel | the channel | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_close_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
SSH channel close callback.
Called when a channel is closed by remote peer
| session | Current session handler | 
| channel | the actual channel | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_data_callback) (ssh_session session, ssh_channel channel, void *data, uint32_t len, int is_stderr, void *userdata) | 
SSH channel data callback.
Called when data is available on a channel
| session | Current session handler | 
| channel | the actual channel | 
| data | the data that has been read on the channel | 
| len | the length of the data | 
| is_stderr | is 0 for stdout or 1 for stderr | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_env_request_callback) (ssh_session session, ssh_channel channel, const char *env_name, const char *env_value, void *userdata) | 
SSH channel environment request from a client.
| channel | the channel | 
| env_name | name of the environment value to be set | 
| env_value | value of the environment value to be set | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_eof_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
SSH channel eof callback.
Called when a channel receives EOF
| session | Current session handler | 
| channel | the actual channel | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_exec_request_callback) (ssh_session session, ssh_channel channel, const char *command, void *userdata) | 
SSH channel Exec request from a client.
| channel | the channel | 
| command | the shell command to be executed | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_exit_signal_callback) (ssh_session session, ssh_channel channel, const char *signal, int core, const char *errmsg, const char *lang, void *userdata) | 
SSH channel exit signal callback.
Called when a channel has received an exit signal
| session | Current session handler | 
| channel | the actual channel | 
| signal | the signal name (without the SIG prefix) | 
| core | a boolean telling wether a core has been dumped or not | 
| errmsg | the description of the exception | 
| lang | the language of the description (format: RFC 3066) | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_exit_status_callback) (ssh_session session, ssh_channel channel, int exit_status, void *userdata) | 
SSH channel exit status callback.
Called when a channel has received an exit status
| session | Current session handler | 
| channel | the actual channel | 
| userdata | Userdata to be passed to the callback function. | 
| typedef ssh_channel(* ssh_channel_open_request_session_callback) (ssh_session session, void *userdata) | 
Handles an SSH new channel open session request.
| session | current session handler | 
| userdata | Userdata to be passed to the callback function. | 
| typedef ssh_channel(* ssh_channel_open_request_x11_callback) (ssh_session session, const char *originator_address, int originator_port, void *userdata) | 
Handles an SSH new channel open X11 request.
This happens when the server sends back an X11 connection attempt. This is a client-side API
| session | current session handler | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_pty_request_callback) (ssh_session session, ssh_channel channel, const char *term, int width, int height, int pxwidth, int pwheight, void *userdata) | 
SSH channel PTY request from a client.
| channel | the channel | 
| term | The type of terminal emulation | 
| width | width of the terminal, in characters | 
| height | height of the terminal, in characters | 
| pxwidth | width of the terminal, in pixels | 
| pxheight | height of the terminal, in pixels | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_pty_window_change_callback) (ssh_session session, ssh_channel channel, int width, int height, int pxwidth, int pwheight, void *userdata) | 
SSH channel PTY windows change (terminal size) from a client.
| channel | the channel | 
| width | width of the terminal, in characters | 
| height | height of the terminal, in characters | 
| pxwidth | width of the terminal, in pixels | 
| pxheight | height of the terminal, in pixels | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_shell_request_callback) (ssh_session session, ssh_channel channel, void *userdata) | 
SSH channel Shell request from a client.
| channel | the channel | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_signal_callback) (ssh_session session, ssh_channel channel, const char *signal, void *userdata) | 
SSH channel signal callback.
Called when a channel has received a signal
| session | Current session handler | 
| channel | the actual channel | 
| signal | the signal name (without the SIG prefix) | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_channel_subsystem_request_callback) (ssh_session session, ssh_channel channel, const char *subsystem, void *userdata) | 
SSH channel subsystem request from a client.
| channel | the channel | 
| subsystem | the subsystem required | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_channel_x11_req_callback) (ssh_session session, ssh_channel channel, int single_connection, const char *auth_protocol, const char *auth_cookie, uint32_t screen_number, void *userdata) | 
SSH X11 request from the client.
This request is sent by a client when X11 forwarding is requested(and available). Server is free to ignore this callback, no answer is expected.
| channel | the channel | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_global_request_callback) (ssh_session session, ssh_message message, void *userdata) | 
SSH global request callback.
All global request will go through this callback.
| session | Current session handler | 
| message | the actual message | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_log_callback) (ssh_session session, int priority, const char *message, void *userdata) | 
SSH log callback.
All logging messages will go through this callback
| session | Current session handler | 
| priority | Priority of the log, the smaller being the more important | 
| message | the actual message | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_logging_callback) (int priority, const char *function, const char *buffer, void *userdata) | 
SSH log callback.
All logging messages will go through this callback.
| priority | Priority of the log, the smaller being the more important. | 
| function | The function name calling the the logging fucntions. | 
| message | The actual message | 
| userdata | Userdata to be passed to the callback function. | 
| typedef int(* ssh_packet_callback) (ssh_session session, uint8_t type, ssh_buffer packet, void *user) | 
Prototype for a packet callback, to be called when a new packet arrives.
| session | The current session of the packet | 
| type | packet type (see ssh2.h) | 
| packet | buffer containing the packet, excluding size, type and padding fields | 
| user | user argument to the callback and are called each time a packet shows up | 
| typedef int(* ssh_service_request_callback) (ssh_session session, const char *service, void *userdata) | 
Handles an SSH service request.
| session | current session handler | 
| service | name of the service (e.g. "ssh-userauth") requested | 
| userdata | Userdata to be passed to the callback function. | 
| typedef void(* ssh_status_callback) (ssh_session session, float status, void *userdata) | 
SSH Connection status callback.
| session | Current session handler | 
| status | Percentage of connection status, going from 0.0 to 1.0 once connection is done. | 
| userdata | Userdata to be passed to the callback function. | 
| LIBSSH_API int ssh_set_callbacks | ( | ssh_session | session, | 
| ssh_callbacks | cb | ||
| ) | 
Set the session callback functions.
This functions sets the callback structure to use your own callback functions for auth, logging and status.
| session | The session to set the callback structure. | 
| cb | The callback structure itself. | 
References ssh_get_log_callback(), ssh_set_log_callback(), and ssh_set_log_userdata().
| LIBSSH_API int ssh_set_channel_callbacks | ( | ssh_channel | channel, | 
| ssh_channel_callbacks | cb | ||
| ) | 
Set the channel callback functions.
This functions sets the callback structure to use your own callback functions for channel data and exceptions
| channel | The channel to set the callback structure. | 
| cb | The callback structure itself. | 
| LIBSSH_API int ssh_set_server_callbacks | ( | ssh_session | session, | 
| ssh_server_callbacks | cb | ||
| ) | 
Set the session server callback functions.
This functions sets the callback structure to use your own callback functions for user authentication, new channels and requests.
| session | The session to set the callback structure. | 
| cb | The callback structure itself. | 
 1.8.13
 1.8.13