Move files to match FreeBSD layout

1 files changed, 300 insertions, 0 deletions

diff --git a/freebsd/sys/kern/uipc_accf.c b/freebsd/sys/kern/uipc_accf.c
new file mode 100644
index 00000000..fd482e64
--- /dev/null
+++ b/freebsd/sys/kern/uipc_accf.c
@@ -0,0 +1,300 @@
+#include <freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * Copyright (c) 2000 Paycounter, Inc.
+ * Copyright (c) 2005 Robert N. M. Watson
+ * Author: Alfred Perlstein <alfred@paycounter.com>, <alfred@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <freebsd/sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#define ACCEPT_FILTER_MOD
+
+#include <freebsd/local/opt_param.h>
+#include <freebsd/sys/param.h>
+#include <freebsd/sys/systm.h>
+#include <freebsd/sys/domain.h>
+#include <freebsd/sys/kernel.h>
+#include <freebsd/sys/lock.h>
+#include <freebsd/sys/malloc.h>
+#include <freebsd/sys/mbuf.h>
+#include <freebsd/sys/module.h>
+#include <freebsd/sys/mutex.h>
+#include <freebsd/sys/protosw.h>
+#include <freebsd/sys/sysctl.h>
+#include <freebsd/sys/socket.h>
+#include <freebsd/sys/socketvar.h>
+#include <freebsd/sys/queue.h>
+
+static struct mtx accept_filter_mtx;
+MTX_SYSINIT(accept_filter, &accept_filter_mtx, "accept_filter_mtx",
+	MTX_DEF);
+#define	ACCEPT_FILTER_LOCK()	mtx_lock(&accept_filter_mtx)
+#define	ACCEPT_FILTER_UNLOCK()	mtx_unlock(&accept_filter_mtx)
+
+static SLIST_HEAD(, accept_filter) accept_filtlsthd =
+	SLIST_HEAD_INITIALIZER(accept_filtlsthd);
+
+MALLOC_DEFINE(M_ACCF, "accf", "accept filter data");
+
+static int unloadable = 0;
+
+SYSCTL_DECL(_net_inet);	/* XXX: some header should do this for me */
+SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW, 0, "Accept filters");
+SYSCTL_INT(_net_inet_accf, OID_AUTO, unloadable, CTLFLAG_RW, &unloadable, 0,
+	"Allow unload of accept filters (not recommended)");
+
+/*
+ * Must be passed a malloc'd structure so we don't explode if the kld is
+ * unloaded, we leak the struct on deallocation to deal with this, but if a
+ * filter is loaded with the same name as a leaked one we re-use the entry.
+ */
+int
+accept_filt_add(struct accept_filter *filt)
+{
+	struct accept_filter *p;
+
+	ACCEPT_FILTER_LOCK();
+	SLIST_FOREACH(p, &accept_filtlsthd, accf_next)
+		if (strcmp(p->accf_name, filt->accf_name) == 0)  {
+			if (p->accf_callback != NULL) {
+				ACCEPT_FILTER_UNLOCK();
+				return (EEXIST);
+			} else {
+				p->accf_callback = filt->accf_callback;
+				ACCEPT_FILTER_UNLOCK();
+				free(filt, M_ACCF);
+				return (0);
+			}
+		}
+				
+	if (p == NULL)
+		SLIST_INSERT_HEAD(&accept_filtlsthd, filt, accf_next);
+	ACCEPT_FILTER_UNLOCK();
+	return (0);
+}
+
+int
+accept_filt_del(char *name)
+{
+	struct accept_filter *p;
+
+	p = accept_filt_get(name);
+	if (p == NULL)
+		return (ENOENT);
+
+	p->accf_callback = NULL;
+	return (0);
+}
+
+struct accept_filter *
+accept_filt_get(char *name)
+{
+	struct accept_filter *p;
+
+	ACCEPT_FILTER_LOCK();
+	SLIST_FOREACH(p, &accept_filtlsthd, accf_next)
+		if (strcmp(p->accf_name, name) == 0)
+			break;
+	ACCEPT_FILTER_UNLOCK();
+
+	return (p);
+}
+
+int
+accept_filt_generic_mod_event(module_t mod, int event, void *data)
+{
+	struct accept_filter *p;
+	struct accept_filter *accfp = (struct accept_filter *) data;
+	int error;
+
+	switch (event) {
+	case MOD_LOAD:
+		p = malloc(sizeof(*p), M_ACCF,
+		    M_WAITOK);
+		bcopy(accfp, p, sizeof(*p));
+		error = accept_filt_add(p);
+		break;
+
+	case MOD_UNLOAD:
+		/*
+		 * Do not support unloading yet. we don't keep track of
+		 * refcounts and unloading an accept filter callback and then
+		 * having it called is a bad thing.  A simple fix would be to
+		 * track the refcount in the struct accept_filter.
+		 */
+		if (unloadable != 0) {
+			error = accept_filt_del(accfp->accf_name);
+		} else
+			error = EOPNOTSUPP;
+		break;
+
+	case MOD_SHUTDOWN:
+		error = 0;
+		break;
+
+	default:
+		error = EOPNOTSUPP;
+		break;
+	}
+
+	return (error);
+}
+
+int
+do_getopt_accept_filter(struct socket *so, struct sockopt *sopt)
+{
+	struct accept_filter_arg *afap;
+	int error;
+
+	error = 0;
+	afap = malloc(sizeof(*afap), M_TEMP,
+	    M_WAITOK | M_ZERO);
+	SOCK_LOCK(so);
+	if ((so->so_options & SO_ACCEPTCONN) == 0) {
+		error = EINVAL;
+		goto out;
+	}
+	if ((so->so_options & SO_ACCEPTFILTER) == 0) {
+		error = EINVAL;
+		goto out;
+	}
+	strcpy(afap->af_name, so->so_accf->so_accept_filter->accf_name);
+	if (so->so_accf->so_accept_filter_str != NULL)
+		strcpy(afap->af_arg, so->so_accf->so_accept_filter_str);
+out:
+	SOCK_UNLOCK(so);
+	if (error == 0)
+		error = sooptcopyout(sopt, afap, sizeof(*afap));
+	free(afap, M_TEMP);
+	return (error);
+}
+
+int
+do_setopt_accept_filter(struct socket *so, struct sockopt *sopt)
+{
+	struct accept_filter_arg *afap;
+	struct accept_filter *afp;
+	struct so_accf *newaf;
+	int error = 0;
+
+	/*
+	 * Handle the simple delete case first.
+	 */
+	if (sopt == NULL || sopt->sopt_val == NULL) {
+		SOCK_LOCK(so);
+		if ((so->so_options & SO_ACCEPTCONN) == 0) {
+			SOCK_UNLOCK(so);
+			return (EINVAL);
+		}
+		if (so->so_accf != NULL) {
+			struct so_accf *af = so->so_accf;
+			if (af->so_accept_filter != NULL &&
+				af->so_accept_filter->accf_destroy != NULL) {
+				af->so_accept_filter->accf_destroy(so);
+			}
+			if (af->so_accept_filter_str != NULL)
+				free(af->so_accept_filter_str, M_ACCF);
+			free(af, M_ACCF);
+			so->so_accf = NULL;
+		}
+		so->so_options &= ~SO_ACCEPTFILTER;
+		SOCK_UNLOCK(so);
+		return (0);
+	}
+
+	/*
+	 * Pre-allocate any memory we may need later to avoid blocking at
+	 * untimely moments.  This does not optimize for invalid arguments.
+	 */
+	afap = malloc(sizeof(*afap), M_TEMP,
+	    M_WAITOK);
+	error = sooptcopyin(sopt, afap, sizeof *afap, sizeof *afap);
+	afap->af_name[sizeof(afap->af_name)-1] = '\0';
+	afap->af_arg[sizeof(afap->af_arg)-1] = '\0';
+	if (error) {
+		free(afap, M_TEMP);
+		return (error);
+	}
+	afp = accept_filt_get(afap->af_name);
+	if (afp == NULL) {
+		free(afap, M_TEMP);
+		return (ENOENT);
+	}
+	/*
+	 * Allocate the new accept filter instance storage.  We may
+	 * have to free it again later if we fail to attach it.  If
+	 * attached properly, 'newaf' is NULLed to avoid a free()
+	 * while in use.
+	 */
+	newaf = malloc(sizeof(*newaf), M_ACCF, M_WAITOK |
+	    M_ZERO);
+	if (afp->accf_create != NULL && afap->af_name[0] != '\0') {
+		int len = strlen(afap->af_name) + 1;
+		newaf->so_accept_filter_str = malloc(len, M_ACCF,
+		    M_WAITOK);
+		strcpy(newaf->so_accept_filter_str, afap->af_name);
+	}
+
+	/*
+	 * Require a listen socket; don't try to replace an existing filter
+	 * without first removing it.
+	 */
+	SOCK_LOCK(so);
+	if (((so->so_options & SO_ACCEPTCONN) == 0) ||
+	    (so->so_accf != NULL)) {
+		error = EINVAL;
+		goto out;
+	}
+
+	/*
+	 * Invoke the accf_create() method of the filter if required.  The
+	 * socket mutex is held over this call, so create methods for filters
+	 * can't block.
+	 */
+	if (afp->accf_create != NULL) {
+		newaf->so_accept_filter_arg =
+		    afp->accf_create(so, afap->af_arg);
+		if (newaf->so_accept_filter_arg == NULL) {
+			error = EINVAL;
+			goto out;
+		}
+	}
+	newaf->so_accept_filter = afp;
+	so->so_accf = newaf;
+	so->so_options |= SO_ACCEPTFILTER;
+	newaf = NULL;
+out:
+	SOCK_UNLOCK(so);
+	if (newaf != NULL) {
+		if (newaf->so_accept_filter_str != NULL)
+			free(newaf->so_accept_filter_str, M_ACCF);
+		free(newaf, M_ACCF);
+	}
+	if (afap != NULL)
+		free(afap, M_TEMP);
+	return (error);
+}