From a6a209f2cc1f1d34f8b16c17f8cb345db2ecbe99 Mon Sep 17 00:00:00 2001
From: andre <andre@FreeBSD.org>
Date: Fri, 18 Nov 2005 20:12:40 +0000
Subject: Consolidate all IP Options handling functions into ip_options.[ch]
 and include ip_options.h into all files making use of IP Options functions.

From ip_input.c rev 1.306:
  ip_dooptions(struct mbuf *m, int pass)
  save_rte(m, option, dst)
  ip_srcroute(m0)
  ip_stripoptions(m, mopt)

From ip_output.c rev 1.249:
  ip_insertoptions(m, opt, phlen)
  ip_optcopy(ip, jp)
  ip_pcbopts(struct inpcb *inp, int optname, struct mbuf *m)

No functional changes in this commit.

Discussed with:	rwatson
Sponsored by:	TCP/IP Optimization Fundraise 2005
---
 sys/netinet/ip_options.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 sys/netinet/ip_options.h

(limited to 'sys/netinet/ip_options.h')

diff --git a/sys/netinet/ip_options.h b/sys/netinet/ip_options.h
new file mode 100644
index 0000000..b7c0050
--- /dev/null
+++ b/sys/netinet/ip_options.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 2005
+ *	Andre Oppermann, Internet Business Solutions AG.  All right 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.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 _NETINET_IP_OPTIONS_H_
+#define	_NETINET_IP_OPTIONS_H_
+
+/*
+ * Structure stored in mbuf in inpcb.ip_options
+ * and passed to ip_output when ip options are in use.
+ * The actual length of the options (including ipopt_dst)
+ * is in m_len.
+ */
+#define MAX_IPOPTLEN    40
+
+struct ipoptrt {
+        struct  in_addr dst;                    /* final destination */
+        char    nop;                            /* one NOP to align */
+        char    srcopt[IPOPT_OFFSET + 1];       /* OPTVAL, OLEN and OFFSET */
+        struct  in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
+};
+
+struct ipopt_tag {
+	struct	m_tag tag;			/* m_tag */
+	int	ip_nhops;
+	struct	ipoptrt ip_srcrt;
+};
+
+struct ipoption {
+	struct	in_addr ipopt_dst;	/* first-hop dst if source routed */
+	char	ipopt_list[MAX_IPOPTLEN];	/* options proper */
+};
+
+extern	int	ip_doopts;		/* process or ignore IP options */
+
+int	ip_dooptions(struct mbuf *, int);
+struct mbuf *
+	ip_insertoptions(struct mbuf *, struct mbuf *, int *);
+int	ip_optcopy(struct ip *, struct ip *);
+int	ip_pcbopts(struct inpcb *, int, struct mbuf *);
+void	ip_stripoptions(struct mbuf *, struct mbuf *);
+struct mbuf *
+	ip_srcroute(struct mbuf *);
+
+#endif /* !_NETINET_IP_OPTIONS_H_ */
-- 
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