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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

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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 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

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