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45 lines
1.8 KiB
Groff
45 lines
1.8 KiB
Groff
.TH libssh2_session_callback_set 3 "1 Jun 2007" "libssh2 0.15" "libssh2 manual"
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.SH NAME
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libssh2_session_callback_set - set a callback function
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.SH SYNOPSIS
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.nf
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#include <libssh2.h>
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void *libssh2_session_callback_set(LIBSSH2_SESSION *session,
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int cbtype, void *callback);
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.SH DESCRIPTION
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Sets a custom callback handler for a previously initialized session
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object. Callbacks are triggered by the receipt of special packets at the
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Transport layer. To disable a callback, set it to NULL.
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\fIsession\fP - Session instance as returned by
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.BR libssh2_session_init_ex(3)
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\fIcbtype\fP - Callback type. One of the types listed in Callback Types.
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\fIcallback\fP - Pointer to custom callback function. The prototype for
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this function must match the associated callback declaration macro.
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.SH CALLBACK TYPES
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.IP LIBSSH2_CALLBACK_IGNORE
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Called when a SSH_MSG_IGNORE message is received
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.IP LIBSSH2_CALLBACK_DEBUG
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Called when a SSH_MSG_DEBUG message is received
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.IP LIBSSH2_CALLBACK_DISCONNECT
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Called when a SSH_MSG_DISCONNECT message is received
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.IP LIBSSH2_CALLBACK_MACERROR
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Called when a mismatched MAC has been detected in the transport layer. If the
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function returns 0, the packet will be accepted nonetheless.
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.IP LIBSSH2_CALLBACK_X11
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Called when an X11 connection has been accepted
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.IP LIBSSH2_CALLBACK_SEND
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Called when libssh2 wants to send some data on the connection.
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Can be set to a custom function to handle I/O your own way.
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.IP LIBSSH2_CALLBACK_RECV
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Called when libssh2 wants to receive some data from the connection.
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Can be set to a custom function to handle I/O your own way.
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.SH RETURN VALUE
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Pointer to previous callback handler. Returns NULL if no prior callback
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handler was set or the callback type was unknown.
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.SH SEE ALSO
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.BR libssh2_session_init_ex(3)
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