A simple packet distribution node type that acts like an Ethernet hub.

8 files changed, 223 insertions, 0 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index 3f96b4f..fc4c4f1 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -170,6 +170,7 @@ MAN=	aac.4 \
 	ng_h4.4 \
 	ng_hci.4 \
 	ng_hole.4 \
+	ng_hub.4 \
 	ng_iface.4 \
 	ng_ip_input.4 \
 	ng_ksocket.4 \
diff --git a/share/man/man4/ng_bridge.4 b/share/man/man4/ng_bridge.4
index 219eaef..b9a04db 100644
--- a/share/man/man4/ng_bridge.4
+++ b/share/man/man4/ng_bridge.4
@@ -195,6 +195,8 @@ Example script showing how to set up a bridging network
 .Xr bridge 4 ,
 .Xr netgraph 4 ,
 .Xr ng_ether 4 ,
+.Xr ng_hub 4 ,
+.Xr ng_one2many 4 ,
 .Xr ngctl 8
 .Sh HISTORY
 The
diff --git a/share/man/man4/ng_hub.4 b/share/man/man4/ng_hub.4
new file mode 100644
index 0000000..a1ad068
--- /dev/null
+++ b/share/man/man4/ng_hub.4
@@ -0,0 +1,66 @@
+.\" Copyright (c) 2004 Ruslan Ermilov
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd April 17, 2004
+.Dt NG_HUB 4
+.Os
+.Sh NAME
+.Nm ng_hub
+.Nd packet distribution netgraph node type
+.Sh SYNOPSIS
+.In netgraph/ng_hub.h
+.Sh DESCRIPTION
+The
+.Nm hub
+node type provides a simple mechanism for distributing packets over
+several links.
+Packets received on any of the hooks are forwarded out the other hooks.
+Packets are not altered in any way.
+.Sh HOOKS
+A
+.Nm hub
+node accepts any request to connect, regardless of the hook name,
+as long as the name is unique.
+.Sh CONTROL MESSAGES
+This node type supports only the generic control messages.
+.Sh SHUTDOWN
+This node shuts down upon receipt of a
+.Dv NGM_SHUTDOWN
+control message, or when all hooks have been disconnected.
+.Sh SEE ALSO
+.Xr netgraph 4 ,
+.Xr ng_bridge 4 ,
+.Xr ng_ether 4 ,
+.Xr ng_one2many 4 ,
+.Xr ngctl 8 ,
+.Xr nghook 8
+.Sh HISTORY
+The
+.Nm
+node type appeared in
+.Fx 5.3 .
+.Sh AUTHORS
+.An Ruslan Ermilov Aq ru@FreeBSD.org
diff --git a/share/man/man4/ng_one2many.4 b/share/man/man4/ng_one2many.4
index 1238680..08078bc 100644
--- a/share/man/man4/ng_one2many.4
+++ b/share/man/man4/ng_one2many.4
@@ -228,6 +228,7 @@ A good candidate is Cisco's Etherchannel.
 .Xr netgraph 4 ,
 .Xr ng_bridge 4 ,
 .Xr ng_ether 4 ,
+.Xr ng_hub 4 ,
 .Xr ngctl 8
 .Sh HISTORY
 The
diff --git a/sys/modules/netgraph/Makefile b/sys/modules/netgraph/Makefile
index 3b92f0b..d3abf41 100644
--- a/sys/modules/netgraph/Makefile
+++ b/sys/modules/netgraph/Makefile
@@ -17,6 +17,7 @@ SUBDIR=	UI \
 	gif \
 	gif_demux \
 	hole \
+	hub \
 	iface \
 	ip_input \
 	ksocket \
diff --git a/sys/modules/netgraph/hub/Makefile b/sys/modules/netgraph/hub/Makefile
new file mode 100644
index 0000000..9ebb54d
--- /dev/null
+++ b/sys/modules/netgraph/hub/Makefile
@@ -0,0 +1,6 @@
+# $FreeBSD$
+
+KMOD=	ng_hub
+SRCS=	ng_hub.c
+
+.include <bsd.kmod.mk>
diff --git a/sys/netgraph/ng_hub.c b/sys/netgraph/ng_hub.c
new file mode 100644
index 0000000..bf61f6a
--- /dev/null
+++ b/sys/netgraph/ng_hub.c
@@ -0,0 +1,110 @@
+/*-
+ * Copyright (c) 2004 Ruslan Ermilov
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/kernel.h>
+#include <sys/mbuf.h>
+#include <sys/systm.h>
+
+#include <netgraph/ng_message.h>
+#include <netgraph/ng_hub.h>
+#include <netgraph/netgraph.h>
+
+static ng_constructor_t	ng_hub_constructor;
+static ng_rcvdata_t	ng_hub_rcvdata;
+static ng_disconnect_t	ng_hub_disconnect;
+
+static struct ng_type ng_hub_typestruct = {
+	.version =	NG_ABI_VERSION,
+	.name =		NG_HUB_NODE_TYPE,
+	.constructor =	ng_hub_constructor,
+	.rcvdata =	ng_hub_rcvdata,
+	.disconnect =	ng_hub_disconnect,
+};
+NETGRAPH_INIT(hub, &ng_hub_typestruct);
+
+
+static int
+ng_hub_constructor(node_p node)
+{
+
+	return (0);
+}
+
+static int
+ng_hub_rcvdata(hook_p hook, item_p item)
+{
+	const node_p node = NG_HOOK_NODE(hook);
+	int error = 0;
+	hook_p hook2;
+	struct mbuf * const m = NGI_M(item), *m2;
+	meta_p const meta = NGI_META(item);
+	meta_p meta2;
+	int nhooks;
+
+	if ((nhooks = NG_NODE_NUMHOOKS(node)) == 1) {
+		NG_FREE_ITEM(item);
+		return (0);
+	}
+	LIST_FOREACH(hook2, &node->nd_hooks, hk_hooks) {
+		if (hook2 == hook)
+			continue;
+		if (--nhooks == 1)
+			NG_FWD_ITEM_HOOK(error, item, hook2);
+		else {
+			if ((m2 = m_dup(m, M_DONTWAIT)) == NULL) {
+				NG_FREE_ITEM(item);
+				return (ENOBUFS);
+			}
+			if (meta != NULL) {
+				if ((meta2 = ng_copy_meta(meta)) == NULL) {
+					m_freem(m2);
+					NG_FREE_ITEM(item);
+					return (ENOMEM);
+				}
+			} else
+				meta2 = NULL;
+			NG_SEND_DATA(error, hook2, m2, meta2);
+			if (error)
+				break;
+		}
+	}
+
+	return (error);
+}
+
+static int
+ng_hub_disconnect(hook_p hook)
+{
+
+	if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 &&
+	    NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))
+		ng_rmnode_self(NG_HOOK_NODE(hook));
+	return (0);
+}
diff --git a/sys/netgraph/ng_hub.h b/sys/netgraph/ng_hub.h
new file mode 100644
index 0000000..a735d7b
--- /dev/null
+++ b/sys/netgraph/ng_hub.h
@@ -0,0 +1,36 @@
+/*-
+ * Copyright (c) 2004 Ruslan Ermilov
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _NETGRAPH_NG_HUB_H_
+#define	_NETGRAPH_NG_HUB_H_
+
+/* Node type name and magic cookie. */
+#define	NG_HUB_NODE_TYPE	"hub"
+#define	NGM_HUB_COOKIE		1082189597
+
+#endif /* _NETGRAPH_NG_HUB_H_ */