1 files changed, 82 insertions, 0 deletions

diff --git a/sys/netgraph/ng_tcpmss.h b/sys/netgraph/ng_tcpmss.h
new file mode 100644
index 000000000000..4450ac6f0629
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+++ b/sys/netgraph/ng_tcpmss.h
@@ -0,0 +1,82 @@
+/*-
+ * ng_tcpmss.h
+ *
+ * Copyright (c) 2004, Alexey Popov <lollypop@flexuser.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_TCPMSS_H_
+#define _NETGRAPH_TCPMSS_H_
+
+/* Node type name and magic cookie */
+#define NG_TCPMSS_NODE_TYPE	"tcpmss"
+#define NGM_TCPMSS_COOKIE	1097623478
+
+/* Statistics structure for one hook. */
+struct ng_tcpmss_hookstat {
+	uint64_t	Octets;
+	uint64_t	Packets;
+	uint16_t	maxMSS;
+	uint64_t	SYNPkts;
+	uint64_t	FixedPkts;
+};
+
+/* Keep this in sync with the above structure definition. */
+#define NG_TCPMSS_HOOKSTAT_INFO	{			\
+	{ "Octets",	&ng_parse_uint64_type	},	\
+	{ "Packets",	&ng_parse_uint64_type	},	\
+	{ "maxMSS",	&ng_parse_uint16_type	},	\
+	{ "SYNPkts",	&ng_parse_uint64_type	},	\
+	{ "FixedPkts",	&ng_parse_uint64_type	},	\
+	{ NULL }					\
+}
+
+
+/* Structure for NGM_TCPMSS_CONFIG. */
+struct ng_tcpmss_config {
+	char		inHook[NG_HOOKSIZ];
+	char		outHook[NG_HOOKSIZ];
+	uint16_t	maxMSS;
+};
+
+/* Keep this in sync with the above structure definition. */
+#define NG_TCPMSS_CONFIG_INFO {				\
+	{ "inHook",	&ng_parse_hookbuf_type	},	\
+	{ "outHook",	&ng_parse_hookbuf_type	},	\
+	{ "maxMSS",	&ng_parse_uint16_type	},	\
+	{ NULL }					\
+}
+
+/* Netgraph commands */
+enum {
+	NGM_TCPMSS_GET_STATS = 1,	/* Get stats. */
+	NGM_TCPMSS_CLR_STATS,		/* Clear stats. */
+	NGM_TCPMSS_GETCLR_STATS,	/* "Atomically" get and clear stats. */
+	NGM_TCPMSS_CONFIG		/* Set configuration. */
+};
+
+#endif /* _NETGRAPH_TCPMSS_H_ */