accf_data(9) [netbsd man page]

ACCF_DATA(9)						   BSD Kernel Developer's Manual					      ACCF_DATA(9)

NAME

     accf_data -- buffer incoming connections until data arrives

SYNOPSIS

     options INET
     pseudo-device accf_data

DESCRIPTION

     This is a filter to be placed on a socket that will be using accept() to receive incoming connections.

     It prevents the application from receiving the connected descriptor via accept() until data arrives on the connection.

EXAMPLES

     If the accf_data accept filter is present in the kernel configuration, this will enable the data accept filter on the socket sok.

	     struct accept_filter_arg afa;

	     bzero(&afa, sizeof(afa));
	     strcpy(afa.af_name, "dataready");
	     setsockopt(sok, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));

SEE ALSO

     setsockopt(2), accept_filter(9), accf_http(9)

HISTORY

     The accept filter mechanism and the accf_data filter were introduced in FreeBSD 4.0.  They were ported to NetBSD by Coyote Point Systems and
     appeared in NetBSD 5.0.

AUTHORS

     This manual page and the filter were written by Alfred Perlstein.

BSD
								  August 10, 2008							       BSD

ACCF_DATA(9)						   BSD Kernel Developer's Manual					      ACCF_DATA(9)

NAME

     accf_data -- buffer incoming connections until data arrives

SYNOPSIS

     options INET
     options ACCEPT_FILTER_DATA
     kldload accf_data

DESCRIPTION

     This is a filter to be placed on a socket that will be using accept() to receive incoming connections.

     It prevents the application from receiving the connected descriptor via accept() until data arrives on the connection.

     The ACCEPT_FILTER_DATA kernel option is also a module that can be enabled at runtime via kldload(8) if the INET option has been compiled into
     the kernel.

EXAMPLES

     Assuming ACCEPT_FILTER_DATA has been included in the kernel config file or the accf_data module has been loaded, this will enable the data
     accept filter on the socket sok.

	     struct accept_filter_arg afa;

	     bzero(&afa, sizeof(afa));
	     strcpy(afa.af_name, "dataready");
	     setsockopt(sok, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));

SEE ALSO

     setsockopt(2), accept_filter(9), accf_dns(9) accf_http(9)

HISTORY

     The accept filter mechanism and the accf_data filter were introduced in FreeBSD 4.0.

AUTHORS

     This manual page and the filter were written by Alfred Perlstein.

BSD
								 November 15, 2000							       BSD