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NetBSD 6.1.5 - man page for accf_data (netbsd section 9)

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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
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