libssh2_session_callback_set(3) libssh2 manual libssh2_session_callback_set(3)NAME
libssh2_session_callback_set - set a callback function
SYNOPSIS
#include <libssh2.h>
void *libssh2_session_callback_set(LIBSSH2_SESSION *session,
int cbtype, void *callback);
DESCRIPTION
Sets a custom callback handler for a previously initialized session object. Callbacks are triggered by the receipt of special packets at
the Transport layer. To disable a callback, set it to NULL.
session - Session instance as returned by libssh2_session_init_ex(3)
cbtype - Callback type. One of the types listed in Callback Types.
callback - Pointer to custom callback function. The prototype for this function must match the associated callback declaration macro.
CALLBACK TYPES
LIBSSH2_CALLBACK_IGNORE
Called when a SSH_MSG_IGNORE message is received
LIBSSH2_CALLBACK_DEBUG
Called when a SSH_MSG_DEBUG message is received
LIBSSH2_CALLBACK_DISCONNECT
Called when a SSH_MSG_DISCONNECT message is received
LIBSSH2_CALLBACK_MACERROR
Called when a mismatched MAC has been detected in the transport layer. If the function returns 0, the packet will be accepted none-
theless.
LIBSSH2_CALLBACK_X11
Called when an X11 connection has been accepted
LIBSSH2_CALLBACK_SEND
Called when libssh2 wants to send some data on the connection. Can be set to a custom function to handle I/O your own way.
LIBSSH2_CALLBACK_RECV
Called when libssh2 wants to receive some data from the connection. Can be set to a custom function to handle I/O your own way.
RETURN VALUE
Pointer to previous callback handler. Returns NULL if no prior callback handler was set or the callback type was unknown.
SEE ALSO libssh2_session_init_ex(3)libssh2 0.15 1 Jun 2007 libssh2_session_callback_set(3)
Check Out this Related Man Page
libssh2_session_startup(3) libssh2 manual libssh2_session_startup(3)NAME
libssh2_session_startup - begin transport layer
SYNOPSIS
#include <libssh2.h>
int libssh2_session_startup(LIBSSH2_SESSION *session, int socket);
DESCRIPTION
Starting in libssh2 version 1.2.8 this function is considered deprecated. Use libssh2_session_handshake(3) instead.
session - Session instance as returned by libssh2_session_init_ex(3)
socket - Connected socket descriptor. Typically a TCP connection though the protocol allows for any reliable transport and the library will
attempt to use any berkeley socket.
Begin transport layer protocol negotiation with the connected host.
RETURN VALUE
Returns 0 on success, negative on failure.
ERRORS
LIBSSH2_ERROR_SOCKET_NONE - The socket is invalid.
LIBSSH2_ERROR_BANNER_SEND - Unable to send banner to remote host.
LIBSSH2_ERROR_KEX_FAILURE - >Encryption key exchange with the remote host failed.
LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.
LIBSSH2_ERROR_SOCKET_DISCONNECT - The socket was disconnected.
LIBSSH2_ERROR_PROTO - An invalid SSH protocol response was received on the socket.
LIBSSH2_ERROR_EAGAIN - Marked for non-blocking I/O but the call would block.
SEE ALSO libssh2_session_free(3)libssh2_session_init_ex(3)libssh2 0.15 1 Jun 2007 libssh2_session_startup(3)
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