2 * Copyright (c) 2000 Alfred Perlstein <alfred@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/netinet/accf_data.c,v 1.1.2.2 2000/09/20 21:34:13 ps Exp $
27 * $DragonFly: src/sys/net/accf_data/accf_data.c,v 1.3 2007/04/22 01:13:12 dillon Exp $
30 #define ACCEPT_FILTER_MOD
32 #include <sys/param.h>
33 #include <sys/sysctl.h>
34 #include <sys/systm.h>
35 #include <sys/sysproto.h>
36 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/unistd.h>
41 #include <sys/fcntl.h>
42 #include <sys/protosw.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
47 #include <sys/resource.h>
48 #include <sys/sysent.h>
49 #include <sys/resourcevar.h>
51 /* accept filter that holds a socket until data arrives */
53 static void sohasdata(struct socket *so, void *arg, int waitflag);
55 static struct accept_filter accf_data_filter = {
62 static moduledata_t accf_data_mod = {
64 accept_filt_generic_mod_event,
68 DECLARE_MODULE(accf_data, accf_data_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
71 sohasdata(struct socket *so, void *arg, int waitflag)
74 if (!soreadable(so)) {
79 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);