Проект OpenNet: MAN accf_data (9) Ядро (FreeBSD и Linux)

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accf_data (9)

>> accf_data (9) ( FreeBSD man: Ядро )

BSD mandoc

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 Fa 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 options INET module has been loaded, this will enable the data accept filter on the socket Fa sok .

        struct accept_filter_arg afa;

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