A netgraph node that can do different manipulations with

mbuf_tags(9) on packets.

Submitted by:		Vadim Goncharov <vadimnuclight tpu.ru>
mdoc(7) reviewed by:	ru

1 files changed, 130 insertions, 0 deletions

diff --git a/sys/netgraph/ng_tag.h b/sys/netgraph/ng_tag.h
new file mode 100644
index 0000000..369fe72
--- /dev/null
+++ b/sys/netgraph/ng_tag.h
@@ -0,0 +1,130 @@
+/*-
+ * Copyright (c) 2006 Vadim Goncharov <vadimnuclight@tpu.ru>
+ * 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 unmodified, 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_TAG_H_
+#define _NETGRAPH_NG_TAG_H_
+
+/* Node type name and magic cookie. */
+#define NG_TAG_NODE_TYPE	"tag"
+#define NGM_TAG_COOKIE		1149771193
+
+/*
+ * The types of tag_cookie, tag_len and tag_id in structures below
+ * must be the same as corresponding members m_tag_cookie, m_tag_len
+ * and m_tag_id in struct m_tag (defined in <sys/mbuf.h>).
+ */
+
+/* Tag match structure for every (input) hook. */
+struct ng_tag_hookin {
+	char		thisHook[NG_HOOKSIZ];		/* name of hook */
+	char		ifMatch[NG_HOOKSIZ];		/* match dest hook */
+	char		ifNotMatch[NG_HOOKSIZ];		/* !match dest hook */
+	uint8_t		strip;				/* strip tag if found */
+	uint32_t	tag_cookie;			/* ABI/Module ID */
+	uint16_t	tag_id;				/* tag ID */
+	uint16_t	tag_len;			/* length of data */
+	uint8_t		tag_data[0];			/* tag data */
+};
+
+/* Tag set structure for every (output) hook. */
+struct ng_tag_hookout {
+	char		thisHook[NG_HOOKSIZ];		/* name of hook */
+	uint32_t	tag_cookie;			/* ABI/Module ID */
+	uint16_t	tag_id;				/* tag ID */
+	uint16_t	tag_len;			/* length of data */
+	uint8_t		tag_data[0];			/* tag data */
+};
+
+#define NG_TAG_HOOKIN_SIZE(taglen)	\
+	(sizeof(struct ng_tag_hookin) + (taglen))
+
+#define NG_TAG_HOOKOUT_SIZE(taglen)	\
+	(sizeof(struct ng_tag_hookout) + (taglen))
+
+/* Keep this in sync with the above structures definitions. */
+#define NG_TAG_HOOKIN_TYPE_INFO(tdtype)	{		\
+	  { "thisHook",		&ng_parse_hookbuf_type	},	\
+	  { "ifMatch",		&ng_parse_hookbuf_type	},	\
+	  { "ifNotMatch",	&ng_parse_hookbuf_type	},	\
+	  { "strip",		&ng_parse_uint8_type	},	\
+	  { "tag_cookie",	&ng_parse_uint32_type	},	\
+	  { "tag_id",		&ng_parse_uint16_type	},	\
+	  { "tag_len",		&ng_parse_uint16_type	},	\
+	  { "tag_data",		(tdtype)		},	\
+	  { NULL }						\
+}
+
+#define NG_TAG_HOOKOUT_TYPE_INFO(tdtype)	{		\
+	  { "thisHook",		&ng_parse_hookbuf_type	},	\
+	  { "tag_cookie",	&ng_parse_uint32_type	},	\
+	  { "tag_id",		&ng_parse_uint16_type	},	\
+	  { "tag_len",		&ng_parse_uint16_type	},	\
+	  { "tag_data",		(tdtype)		},	\
+	  { NULL }						\
+}
+
+#ifdef NG_TAG_DEBUG
+
+/* Statistics structure for one hook. */
+struct ng_tag_hookstat {
+	uint64_t	recvFrames;
+	uint64_t	recvOctets;
+	uint64_t	recvMatchFrames;
+	uint64_t	recvMatchOctets;
+	uint64_t	xmitFrames;
+	uint64_t	xmitOctets;
+};
+
+/* Keep this in sync with the above structure definition. */
+#define NG_TAG_HOOKSTAT_TYPE_INFO	{			\
+	  { "recvFrames",	&ng_parse_uint64_type	},	\
+	  { "recvOctets",	&ng_parse_uint64_type	},	\
+	  { "recvMatchFrames",	&ng_parse_uint64_type	},	\
+	  { "recvMatchOctets",	&ng_parse_uint64_type	},	\
+	  { "xmitFrames",	&ng_parse_uint64_type	},	\
+	  { "xmitOctets",	&ng_parse_uint64_type	},	\
+	  { NULL }						\
+}
+
+#endif /* NG_TAG_DEBUG */
+
+/* Netgraph commands. */
+enum {
+	NGM_TAG_SET_HOOKIN = 1,		/* supply a struct ng_tag_hookin */
+	NGM_TAG_GET_HOOKIN,		/* returns a struct ng_tag_hookin */
+	NGM_TAG_SET_HOOKOUT,		/* supply a struct ng_tag_hookout */
+	NGM_TAG_GET_HOOKOUT,		/* returns a struct ng_tag_hookout */
+#ifdef NG_TAG_DEBUG
+	NGM_TAG_GET_STATS,		/* supply name as char[NG_HOOKSIZ] */
+	NGM_TAG_CLR_STATS,		/* supply name as char[NG_HOOKSIZ] */
+	NGM_TAG_GETCLR_STATS,		/* supply name as char[NG_HOOKSIZ] */
+#endif
+};
+
+#endif /* _NETGRAPH_NG_TAG_H_ */