From 8896bf16ffacd895f2eec852df949cb45b4f7fa2 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 29 Mar 1991 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1991-03-29

---
 port/devbit.c     |  2 ++
 power/devhotrod.c |  2 +-
 ss/arp.h          | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 ss/arp.h

diff --git a/port/devbit.c b/port/devbit.c
index 87c27427256c1e1726ad1b6bedcd412c4a5503f3..e8bbf1db01aefd97cbdd45e753b854bfa3a67b29 100644
--- a/port/devbit.c
+++ b/port/devbit.c
@@ -1058,6 +1058,8 @@ bitcompact(void)
 		p1 += 2 + p1[0];
 	}
 	bit.wfree = p1;
+	if(p1<bit.words || p1>=bit.words+bit.nwords)
+		panic("bitcompact");
 	qunlock(&bitlock);
 }
 
diff --git a/power/devhotrod.c b/power/devhotrod.c
index d493c688993c371c5272a82f418f0fef73382abe..083681de604a039244b4ca907ff65da997b21642 100644
--- a/power/devhotrod.c
+++ b/power/devhotrod.c
@@ -13,6 +13,7 @@
 /*
  * If defined, ENABMEMTEST causes memory test to be run at device open
  */
+#define	ENABMEMTEST
 #ifdef	ENABMEMTEST
 void	mem(Hot*, ulong*, ulong);
 #define	NTESTBUF	256
@@ -21,7 +22,6 @@ ulong	testbuf[NTESTBUF];
 /*
  * If defined, ENABBUSTEST causes bus error diagnostic to be run at device open
  */
-#define	ENABBUSTEST
 
 /*
  * If 1, ENABCKSUM causes data transfers to have checksums
diff --git a/ss/arp.h b/ss/arp.h
new file mode 100644
index 0000000000000000000000000000000000000000..0874d6abbaec4c2d766681be4c6b7b841bd8a89d
--- /dev/null
+++ b/ss/arp.h
@@ -0,0 +1,40 @@
+typedef struct Arppkt	Arppkt;
+typedef struct Arpentry	Arpentry;
+typedef struct Arpstats	Arpstats;
+
+/* Format of ethernet arp request */
+struct Arppkt {
+	uchar	d[6];
+	uchar	s[6];
+	uchar	type[2];
+	uchar	hrd[2];
+	uchar	pro[2];
+	uchar	hln;
+	uchar	pln;
+	uchar	op[2];
+	uchar	sha[6];
+	uchar	spa[4];
+	uchar	tha[6];
+	uchar	tpa[4];
+	};
+
+/* Format of request from starp to user level arpd */
+struct Arpentry {
+	uchar	etaddr[6];
+	uchar	ipaddr[4];
+	};
+
+/* Arp cache statistics */
+struct Arpstats {
+	int	hit;
+	int	miss;
+	int	failed;
+	};
+
+#define ET_ARP		0x0806
+#define ET_RARP		0x8035
+
+#define ARP_REQUEST	1
+#define ARP_REPLY	2
+#define RARP_REQUEST	3
+#define RARP_REPLY	4