Add ng_ip_input. A new netgraph node for queuing IP packets into the

main IP input processing code.

2 files changed, 217 insertions, 0 deletions

diff --git a/sys/netgraph/ng_ip_input.c b/sys/netgraph/ng_ip_input.c
new file mode 100644
index 0000000..eb8a74d
--- /dev/null
+++ b/sys/netgraph/ng_ip_input.c
@@ -0,0 +1,142 @@
+/*
+ * ng_ip_input.c
+ *
+ * Copyright 2001 The Aerospace Corporation.  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.
+ * 3.  The name of The Aerospace Corporation may not be used to endorse or
+ *     promote products derived from this software.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "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 AEROSPACE CORPORATION 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.
+ *
+ * Copyright (c) 1996-1999 Whistle Communications, Inc.
+ * All rights reserved.
+ * 
+ * Subject to the following obligations and disclaimer of warranty, use and
+ * redistribution of this software, in source or object code forms, with or
+ * without modifications are expressly permitted by Whistle Communications;
+ * provided, however, that:
+ * 1. Any and all reproductions of the source or object code must include the
+ *    copyright notice above and the following disclaimer of warranties; and
+ * 2. No rights are granted, in any manner or form, to use Whistle
+ *    Communications, Inc. trademarks, including the mark "WHISTLE
+ *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
+ *    such appears in the above copyright notice or in the software.
+ * 
+ * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
+ * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
+ * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
+ * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
+ * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
+ * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
+ * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
+ * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
+ * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
+ * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author:		Brooks Davis <brooks@FreeBSD.org>
+ * Derived from:	ng_hole.c
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * This node simply takes IP packets and calls ip_input on them
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/if_var.h>
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#include <net/netisr.h>
+#include <netgraph/ng_message.h>
+#include <netgraph/netgraph.h>
+#include <netgraph/ng_ip_input.h>
+
+/* Netgraph methods */
+static ng_constructor_t	ngipi_cons;
+static ng_rcvdata_t	ngipi_rcvdata;
+static ng_disconnect_t	ngipi_disconnect;
+
+static struct ng_type typestruct = {
+	NG_ABI_VERSION,
+	NG_IP_INPUT_NODE_TYPE,
+	NULL,		/* modeventhand_t */
+	ngipi_cons,	/* ng_constructor_t */
+	NULL,		/* ng_rcvmsg_t */
+	NULL,		/* ng_shutdown_t */
+	NULL,		/* ng_newhook_t */
+	NULL,		/* ng_findhook_t */
+	NULL,		/* ng_connect_t */
+	ngipi_rcvdata,	/* ng_rcvdata_t */
+	ngipi_disconnect, /* ng_disconnect_t */
+	NULL		/* ng_cmdlist */
+};
+NETGRAPH_INIT(ip_input, &typestruct);
+
+/* 
+ * Be obliging. but no work to do.
+ */
+static int
+ngipi_cons(node_p node)
+{
+	return(0);
+}
+
+/*
+ * Receive data
+ */
+static int
+ngipi_rcvdata(hook_p hook, item_p item)
+{
+	struct mbuf *m;
+
+	NGI_GET_M(item, m);
+	NG_FREE_ITEM(item);
+	schednetisr(NETISR_IP);
+	(void) IF_HANDOFF(&ipintrq, m, NULL);
+	return 0;
+}
+
+/*
+ * Hook disconnection
+ */
+static int
+ngipi_disconnect(hook_p hook)
+{
+	if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
+		ng_rmnode_self(NG_HOOK_NODE(hook));
+	return (0);
+}
diff --git a/sys/netgraph/ng_ip_input.h b/sys/netgraph/ng_ip_input.h
new file mode 100644
index 0000000..8c087b5
--- /dev/null
+++ b/sys/netgraph/ng_ip_input.h
@@ -0,0 +1,75 @@
+/*
+ * ng_ip_input.h
+ *
+ * Copyright 2001 The Aerospace Corporation.  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.
+ * 3.  The name of The Aerospace Corporation may not be used to endorse or
+ *     promote products derived from this software.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "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 AEROSPACE CORPORATION 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.
+ *
+ * Copyright (c) 1996-1999 Whistle Communications, Inc.
+ * All rights reserved.
+ * 
+ * Subject to the following obligations and disclaimer of warranty, use and
+ * redistribution of this software, in source or object code forms, with or
+ * without modifications are expressly permitted by Whistle Communications;
+ * provided, however, that:
+ * 1. Any and all reproductions of the source or object code must include the
+ *    copyright notice above and the following disclaimer of warranties; and
+ * 2. No rights are granted, in any manner or form, to use Whistle
+ *    Communications, Inc. trademarks, including the mark "WHISTLE
+ *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
+ *    such appears in the above copyright notice or in the software.
+ * 
+ * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
+ * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
+ * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
+ * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
+ * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
+ * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
+ * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
+ * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
+ * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
+ * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author:		Brooks Davis <brooks@FreeBSD.org>
+ * Derived from:	ng_hole.h
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _NETGRAPH_IP_INPUT_H_
+#define _NETGRAPH_IP_INPUT_H_
+
+/* Node type name and magic cookie */
+#define NG_IP_INPUT_NODE_TYPE	"ip_input"
+#define NGM_IP_INPUT_COOKIE	994874907
+
+#endif /* _NETGRAPH_IP_INPUT_H_ */