From 6bfc8041f8bed2c0b102f16274ae576676e2df62 Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@cvs.openbsd.org>
Date: Mon, 9 May 2005 21:54:59 +0000
Subject: - add alpha optimized in4_cksum - de register and use ANSI prototypes

From NetBSD

ok miod@ martin@
---
 sys/arch/alpha/alpha/in_cksum.c | 83 +++++++++++++++++++++++++++++++++--------
 sys/arch/alpha/conf/files.alpha |  3 +-
 2 files changed, 68 insertions(+), 18 deletions(-)

(limited to 'sys')

diff --git a/sys/arch/alpha/alpha/in_cksum.c b/sys/arch/alpha/alpha/in_cksum.c
index 8e33ffa2fc7..8897226b7c8 100644
--- a/sys/arch/alpha/alpha/in_cksum.c
+++ b/sys/arch/alpha/alpha/in_cksum.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: in_cksum.c,v 1.6 2003/06/02 23:27:43 millert Exp $	*/
+/*	$OpenBSD: in_cksum.c,v 1.7 2005/05/09 21:54:58 brad Exp $	*/
 /*	$NetBSD: in_cksum.c,v 1.4 1996/11/13 21:13:06 cgd Exp $	*/
 
 /*
@@ -37,9 +37,11 @@
 #include <sys/param.h>
 #include <sys/mbuf.h>
 #include <sys/systm.h>
+#include <sys/socketvar.h>
 #include <netinet/in.h>
-
-u_int64_t in_cksumdata(caddr_t, int);
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
 
 /*
  * Checksum routine for Internet Protocol family headers
@@ -81,12 +83,8 @@ union q_util {
 	u_int64_t q;
 };
 
-u_int64_t	in_cksumdata(caddr_t buf, int len);
-
-u_int64_t
-in_cksumdata(buf, len)
-	register caddr_t buf;
-	register int len;
+static u_int64_t
+in_cksumdata(caddr_t buf, int len)
 {
 	const u_int32_t *lw = (u_int32_t *) buf;
 	u_int64_t sum = 0;
@@ -167,14 +165,12 @@ in_cksumdata(buf, len)
 }
 
 int
-in_cksum(m, len)
-	register struct mbuf *m;
-	register int len;
+in_cksum(struct mbuf *m, int len)
 {
-	register u_int64_t sum = 0;
-	register int mlen = 0;
-	register int clen = 0;
-	register caddr_t addr;
+	u_int64_t sum = 0;
+	int mlen = 0;
+	int clen = 0;
+	caddr_t addr;
 	union l_util l_util;
 	union q_util q_util;
 
@@ -196,3 +192,58 @@ in_cksum(m, len)
 	REDUCE16;
 	return (~sum & 0xffff);
 }
+
+int
+in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len)
+{
+	u_int64_t sum = 0;
+	int mlen = 0;
+	int clen = 0;
+	caddr_t addr;
+	union q_util q_util;
+	union l_util l_util; 
+	struct ipovly ipov;
+
+	if (nxt != 0) {
+		/* pseudo header */
+		if (off < sizeof(struct ipovly))
+			panic("in4_cksum: offset too short");
+		if (m->m_len < sizeof(struct ip))
+			panic("in4_cksum: bad mbuf chain");
+
+		memset(&ipov, 0, sizeof(ipov));
+
+		ipov.ih_len = htons(len);
+		ipov.ih_pr = nxt;
+		ipov.ih_src = mtod(m, struct ip *)->ip_src;
+		ipov.ih_dst = mtod(m, struct ip *)->ip_dst;
+
+		sum += in_cksumdata((caddr_t) &ipov, sizeof(ipov));
+	}
+
+	/* skip over unnecessary part */
+	while (m != NULL && off > 0) {
+		if (m->m_len > off)
+			break;
+		off -= m->m_len;
+		m = m->m_next;
+	}
+
+	for (; m && len; m = m->m_next, off = 0) {
+		if (m->m_len == 0)
+			continue;
+		mlen = m->m_len - off;
+		if (len < mlen)
+			mlen = len;
+		addr = mtod(m, caddr_t) + off;
+		if ((clen ^ (long) addr) & 1)
+			sum += in_cksumdata(addr, mlen) << 8;
+ 		else
+			sum += in_cksumdata(addr, mlen);
+ 
+ 		clen += mlen;
+ 		len -= mlen;
+	}
+	REDUCE16;
+	return (~sum & 0xffff);
+}
diff --git a/sys/arch/alpha/conf/files.alpha b/sys/arch/alpha/conf/files.alpha
index 5f7e2038d60..867b870c4c3 100644
--- a/sys/arch/alpha/conf/files.alpha
+++ b/sys/arch/alpha/conf/files.alpha
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.alpha,v 1.66 2005/05/01 21:36:55 brad Exp $
+#	$OpenBSD: files.alpha,v 1.67 2005/05/09 21:54:58 brad Exp $
 #	$NetBSD: files.alpha,v 1.32 1996/11/25 04:03:21 cgd Exp $
 #
 # alpha-specific configuration info
@@ -289,7 +289,6 @@ file	dev/clock_subr.c
 #
 
 file	arch/alpha/alpha/in_cksum.c		inet
-file	netinet/in4_cksum.c			inet
 file	netns/ns_cksum.c			ns
 
 # XXX
-- 
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