1a79b7128SAlfred Perlstein /*- 2*4d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause 3fe267a55SPedro F. Giffuni * 4a79b7128SAlfred Perlstein * Copyright (c) 2000 Alfred Perlstein <alfred@FreeBSD.org> 5a79b7128SAlfred Perlstein * All rights reserved. 6a79b7128SAlfred Perlstein * 7a79b7128SAlfred Perlstein * Redistribution and use in source and binary forms, with or without 8a79b7128SAlfred Perlstein * modification, are permitted provided that the following conditions 9a79b7128SAlfred Perlstein * are met: 10a79b7128SAlfred Perlstein * 1. Redistributions of source code must retain the above copyright 11a79b7128SAlfred Perlstein * notice, this list of conditions and the following disclaimer. 12a79b7128SAlfred Perlstein * 2. Redistributions in binary form must reproduce the above copyright 13a79b7128SAlfred Perlstein * notice, this list of conditions and the following disclaimer in the 14a79b7128SAlfred Perlstein * documentation and/or other materials provided with the distribution. 15a79b7128SAlfred Perlstein * 16a79b7128SAlfred Perlstein * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17a79b7128SAlfred Perlstein * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18a79b7128SAlfred Perlstein * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19a79b7128SAlfred Perlstein * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20a79b7128SAlfred Perlstein * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21a79b7128SAlfred Perlstein * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22a79b7128SAlfred Perlstein * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23a79b7128SAlfred Perlstein * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24a79b7128SAlfred Perlstein * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25a79b7128SAlfred Perlstein * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26a79b7128SAlfred Perlstein * SUCH DAMAGE. 27a79b7128SAlfred Perlstein */ 28a79b7128SAlfred Perlstein 294b421e2dSMike Silbersack #include <sys/cdefs.h> 304b421e2dSMike Silbersack __FBSDID("$FreeBSD$"); 314b421e2dSMike Silbersack 32a79b7128SAlfred Perlstein #define ACCEPT_FILTER_MOD 33a79b7128SAlfred Perlstein 34a79b7128SAlfred Perlstein #include <sys/param.h> 35a79b7128SAlfred Perlstein #include <sys/kernel.h> 365dba30f1SPoul-Henning Kamp #include <sys/module.h> 37960ed29cSSeigo Tanimura #include <sys/sysctl.h> 38960ed29cSSeigo Tanimura #include <sys/signalvar.h> 39a79b7128SAlfred Perlstein #include <sys/socketvar.h> 40a79b7128SAlfred Perlstein 41a79b7128SAlfred Perlstein /* accept filter that holds a socket until data arrives */ 42a79b7128SAlfred Perlstein 4374fb0ba7SJohn Baldwin static int sohasdata(struct socket *so, void *arg, int waitflag); 44a79b7128SAlfred Perlstein 45591b09b4SMark Johnston ACCEPT_FILTER_DEFINE(accf_data, "dataready", sohasdata, NULL, NULL, 1); 46a79b7128SAlfred Perlstein 4774fb0ba7SJohn Baldwin static int 48a79b7128SAlfred Perlstein sohasdata(struct socket *so, void *arg, int waitflag) 49a79b7128SAlfred Perlstein { 50a79b7128SAlfred Perlstein 514cc20ab1SSeigo Tanimura if (!soreadable(so)) 5274fb0ba7SJohn Baldwin return (SU_OK); 53a79b7128SAlfred Perlstein 5474fb0ba7SJohn Baldwin return (SU_ISCONNECTED); 55a79b7128SAlfred Perlstein } 56