From b7e5bbedc1cbd6aedd99c189afdb7931371853da Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 2 Jul 1994 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1994-07-02

---
 pc/devether.c | 17 +++++++++--------
 pc/devvga.c   |  8 ++++----
 pc/etherif.h  |  2 +-
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/pc/devether.c b/pc/devether.c
index f7ac3e9bf45f7dff8200961cf7ba4f5c02fb4f30..72c7fc4aed2a266c2a22e99ee663fdcb31074d85 100644
--- a/pc/devether.c
+++ b/pc/devether.c
@@ -95,7 +95,7 @@ etherwstat(Chan *c, char *dp)
 }
 
 void
-etherrloop(Ether *ctlr, Etherpkt *pkt, long len)
+etherrloop(Ether *ctlr, Etherpkt *pkt, long len, int tome)
 {
 	ushort type;
 	Netfile *f, **fp, **ep;
@@ -103,7 +103,7 @@ etherrloop(Ether *ctlr, Etherpkt *pkt, long len)
 	type = (pkt->type[0]<<8)|pkt->type[1];
 	ep = &ctlr->f[Ntypes];
 	for(fp = ctlr->f; fp < ep; fp++){
-		if((f = *fp) && (f->type == type || f->type < 0))
+		if((f = *fp) && ((tome && f->type==type) || f->type < 0))
 			qproduce(f->in, pkt->d, len);
 	}
 }
@@ -111,17 +111,18 @@ etherrloop(Ether *ctlr, Etherpkt *pkt, long len)
 static int
 etherwloop(Ether *ctlr, Etherpkt *pkt, long len)
 {
-	int s, different;
+	int s, tome, bcast;
 
-	different = memcmp(pkt->d, pkt->s, sizeof(pkt->s));
-	if(different && memcmp(pkt->d, ctlr->bcast, sizeof(pkt->d))
-	&& ctlr->prom==0 && ctlr->all==0)
+	tome = memcmp(pkt->d, ctlr->ea, sizeof(pkt->d)) == 0;
+	bcast = memcmp(pkt->d, ctlr->bcast, sizeof(pkt->d)) == 0;
+	if(!tome && !bcast && ctlr->prom==0 && ctlr->all==0)
 		return 0;
 
 	s = splhi();
-	etherrloop(ctlr, pkt, len);
+	etherrloop(ctlr, pkt, len, tome||bcast);
 	splx(s);
-	return !different;
+
+	return tome;
 }
 
 long
diff --git a/pc/devvga.c b/pc/devvga.c
index 33f6a81be04253475e3f227d1ccf23c900ae452d..c555edc49df5f82adacc6090cb161bab928f21a8 100644
--- a/pc/devvga.c
+++ b/pc/devvga.c
@@ -217,8 +217,8 @@ vgaread(Chan *c, void *buf, long n, ulong offset)
 		return readstr(offset, buf, n, cbuf);
 	case Qvgaiob:
 		port = offset;
-		if(checkvgaport(port, n))
-			error(Eperm);
+		/*if(checkvgaport(port, n))
+			error(Eperm);*/
 		for(cp = buf; port < offset+n; port++)
 			*cp++ = vgai(port);
 		return n;
@@ -330,8 +330,8 @@ vgawrite(Chan *c, void *buf, long n, ulong offset)
 		return n;
 	case Qvgaiob:
 		port = offset;
-		if(checkvgaport(port, n))
-			error(Eperm);
+		/*if(checkvgaport(port, n))
+			error(Eperm);*/
 		for(cp = buf; port < offset+n; port++)
 			vgao(port, *cp++);
 		return n;
diff --git a/pc/etherif.h b/pc/etherif.h
index 05fe578bb45a23df776536771fd9ee07296b9f65..0e59ba96fd6f34d0027614e53dbc372ed75b7523 100644
--- a/pc/etherif.h
+++ b/pc/etherif.h
@@ -22,7 +22,7 @@ struct Ether {
 	Netif;
 };
 
-extern void etherrloop(Ether*, Etherpkt*, long);
+extern void etherrloop(Ether*, Etherpkt*, long, int);
 extern void addethercard(char*, int(*)(Ether*));
 
 /*