From b104f81c40a2eb77cab7b0850bafcf216b1b80b9 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 8 May 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-05-08

---
 port/net.c     | 12 +++---------
 port/portdat.h | 30 +++++-------------------------
 2 files changed, 8 insertions(+), 34 deletions(-)

diff --git a/port/net.c b/port/net.c
index fe4aed27985978d97580ca0c4cc301aae48b8a93..2387820ba8c62eb6ced91fb7e98d090894ce8b4f 100644
--- a/port/net.c
+++ b/port/net.c
@@ -180,16 +180,15 @@ netopen(Chan *c, int omode, Network *np)
 		case Sdataqid:
 		case Sctlqid:
 			id = STREAMID(c->qid.path);
+			id = (*np->open)(c, id);
 			break;
 		case Qlisten:
-			streamopen(c, np->devp);
 			id = (*np->listen)(c);
-			streamclose(c);
 			c->qid.path = STREAMQID(id, Sctlqid);
 			ptclone(c, 1, id);
 			break;
 		case Qclone:
-			id = (*np->clone)(c);
+			id = (*np->open)(c, -1);
 			c->qid.path = STREAMQID(id, Sctlqid);
 			ptclone(c, 0, id);
 			break;
@@ -200,9 +199,6 @@ netopen(Chan *c, int omode, Network *np)
 		switch(STREAMTYPE(c->qid.path)){
 		case Sdataqid:
 		case Sctlqid:
-			streamopen(c, np->devp);
-			if(np->protop && c->stream->devq->next->info != np->protop)
-				pushq(c->stream, np->protop);
 			p = findprot(np, id);
 			if(netown(p, up->user, omode&7) < 0)
 				error(Eperm);
@@ -221,9 +217,6 @@ netread(Chan *c, void *a, long n, ulong offset, Network *np)
 	int t;
 	char buf[256];
 
-	if(c->stream)
-		return streamread(c, a, n);
-
 	if(c->qid.path&CHDIR)
 		return devdirread(c, a, n, (Dirtab*)np, 0, netgen);
 
@@ -242,6 +235,7 @@ netadd(Network *np, Netprot *p, int id)
 
 	memset(p, 0, sizeof(Netprot));
 	p->id = id;
+	p->net = np;
 
 	l = &np->prot;
 	for(pp = np->prot; pp; pp = pp->next){
diff --git a/port/portdat.h b/port/portdat.h
index 7b04c7256ff766191c5e55b94c9d2b116f83b8a7..1f43b540c96c5b78340faf3fcefced09f5085e92 100644
--- a/port/portdat.h
+++ b/port/portdat.h
@@ -7,7 +7,6 @@ typedef struct Dev	Dev;
 typedef struct Dirtab	Dirtab;
 typedef struct Egrp	Egrp;
 typedef struct Evalue	Evalue;
-typedef struct Etherpkt	Etherpkt;
 typedef struct Fgrp	Fgrp;
 typedef struct Image	Image;
 typedef struct IOQ	IOQ;
@@ -214,25 +213,6 @@ struct Dirtab
 	long	perm;
 };
 
-/*
- *  Ethernet packet buffers.
- */
-struct Etherpkt
-{
-	uchar	d[6];
-	uchar	s[6];
-	uchar	type[2];
-	uchar	data[1500];
-	uchar	crc[4];
-};
-
-enum
-{
-	ETHERMINTU =	60,		/* minimum transmit size */
-	ETHERMAXTU =	1514,		/* maximum transmit size */
-	ETHERHDRSIZE =	14,		/* size of an ethernet header */
-};
-
 /* SCSI devices. */
 enum
 {
@@ -788,12 +768,13 @@ struct Netprot
 	Netprot	*next;		/* linked list of protections */
 	ulong	mode;
 	char	owner[NAMELEN];
+	Network	*net;
 };
 
 struct Netinf
 {
 	char	*name;
-	void	(*fill)(Chan*, char*, int);
+	void	(*fill)(Netprot*, char*, int);
 };
 
 struct Network
@@ -801,13 +782,12 @@ struct Network
 	Lock;
 	char	*name;
 	int	nconv;			/* max # of conversations */
-	Qinfo	*devp;			/* device end line disc */
-	Qinfo	*protop;		/* protocol line disc */
-	int	(*listen)(Chan*);
-	int	(*clone)(Chan*);
+	int	(*listen)(Netprot*);
+	int	(*open)(Netprot*, int);
 	int	ninfo;
 	Netinf	info[5];
 	Netprot	*prot;			/* linked list of protections */
+	void	*ptr;
 };
 
 enum