From 957732072a3a316fef5653e53e7f04eaeb860eef Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 19 Jan 2001 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2001-01-19

---
 boot/boot.h       |  1 +
 boot/glendakey.c  | 26 ++++++++++++++++++++++++++
 boot/local.c      |  9 +++++++--
 ip/tcp.c          | 36 ++++++++----------------------------
 pc/etherwavelan.c |  5 ++---
 5 files changed, 44 insertions(+), 33 deletions(-)
 create mode 100644 boot/glendakey.c

diff --git a/boot/boot.h b/boot/boot.h
index 6944415d831f30d15b0f5590e9fc487e65f65e3d..8cbded5ab0e3892056e2862de1f41159204d7abb 100644
--- a/boot/boot.h
+++ b/boot/boot.h
@@ -33,6 +33,7 @@ extern char*	checkkey(Method*, char*, char*);
 extern void	fatal(char*);
 extern void	getpasswd(char*, int);
 extern void	key(int, Method*);
+extern void glendakey(int, Method*);
 extern int	nop(int);
 extern int	outin(char*, char*, int);
 extern int	plumb(char*, char*, int*, char*);
diff --git a/boot/glendakey.c b/boot/glendakey.c
new file mode 100644
index 0000000000000000000000000000000000000000..0974847941006ad2cc824f73074c7710e08d8427
--- /dev/null
+++ b/boot/glendakey.c
@@ -0,0 +1,26 @@
+#include <u.h>
+#include <libc.h>
+#include <auth.h>
+#include <../boot/boot.h>
+
+/*
+ *  pretend to get info out of nvram.
+ */
+void
+glendakey(int, Method*)
+{
+	char key[DESKEYLEN];
+
+	passtokey(key, "boyd");
+
+	/* set host's key */
+	if(writefile("#c/key", key, DESKEYLEN) < 0)
+		warning("#c/key");
+
+	/* set host's owner (and uid of current process) */
+	if(writefile("#c/hostowner", "glenda", 6) < 0)
+		warning("#c/hostowner");
+
+	if(writefile("#c/hostdomain", "plan9", 5) < 0)
+		warning("#c/hostdomain");
+}
diff --git a/boot/local.c b/boot/local.c
index d6dc1ab394de7a69a7ff233c555255218717237f..4aa391306c06991db1402c47aba035d096ce426d 100644
--- a/boot/local.c
+++ b/boot/local.c
@@ -64,15 +64,20 @@ connectlocal(void)
 	char *dev;
 	char **arg, **argp;
 
-	if(stat("/kfs", d) < 0)
+	if(stat("/kfs", d) < 0){
+		print("stat /kfs fails: %r\n");
 		return -1;
+	}
 
 	dev = disk ? disk : bootdisk;
 	sprint(partition, "%sfs", dev);
 	if(dirstat(partition, &dir) < 0){
 		strcpy(partition, dev);
-		if(dirstat(partition, &dir) < 0)
+		if(dirstat(partition, &dir) < 0){
+			print("stat %s fails: %r\n", partition);
+			print("(stat %sfs also failed)\n", dev);
 			return -1;
+		}
 	}
 	if(dir.mode & CHDIR)
 		return -1;
diff --git a/ip/tcp.c b/ip/tcp.c
index 4885d55e808a69f15c26dee04b8cc4fa07f7a9df..f756464ec267ba9fdc7ed79cb75ab27c02998b0d 100644
--- a/ip/tcp.c
+++ b/ip/tcp.c
@@ -150,7 +150,6 @@ struct Tcpctl
 		ulong	ptr;		/* Data pointer */
 		ushort	wnd;		/* Tcp send window */
 		ulong	urg;		/* Urgent data pointer */
-		ulong	wl1;
 		ulong	wl2;
 
                 /* to implement tahoe and reno TCP */
@@ -189,7 +188,7 @@ struct Tcpctl
 	int	kacounter;		/* count down for keep alive */
 	uint	sndsyntime;		/* time syn sent */
 	ulong	time;			/* time Finwait2 or Syn_received was sent */
-	int	nochecksum;		/* non-zero means don't send checksums */ 
+	int	nochecksum;		/* non-zero means don't send checksums */
 
 	Tcphdr	protohdr;		/* prototype header */
 };
@@ -646,7 +645,7 @@ tcpmtu(Conv *s)
 }
 
 void
-inittcpctl(Conv *s)
+inittcpctl(Conv *s, int mode)
 {
 	Tcpctl *tcb;
 	Tcphdr *h;
@@ -669,6 +668,7 @@ inittcpctl(Conv *s)
 	tcb->katimer.arg = s;
 
 	/* create a prototype(pseudo) header */
+	if(mode != TCP_LISTEN)
 	if(ipcmp(s->laddr, IPnoaddr) == 0)
 		findlocalip(s->p->f, s->laddr, s->raddr);
 	h = &tcb->protohdr;
@@ -707,7 +707,7 @@ tcpstart(Conv *s, int mode, ushort window)
 	tcb = (Tcpctl*)s->ptcl;
 
 	/* Send SYN, go into SYN_SENT state */
-	inittcpctl(s);
+	inittcpctl(s, mode);
 	tcb->window = window;
 	tcb->rcv.wnd = window;
 
@@ -1111,21 +1111,15 @@ update(Conv *s, Tcp *seg)
 	}
 
 	/*
-	 *  update our send window if this is a new ack (ignore old packets
-	 *  even if the ack is new)
+	 *  update window
 	 */
-	if(seq_ge(seg->ack,tcb->snd.wl2))
-	if(seq_ge(seg->seq,tcb->snd.wl1)) {
-
-		/* a closed window opened, start retransmitting.  why? - presotto */
-		if(seg->wnd != 0 && tcb->snd.wnd == 0)
-			tcb->snd.ptr = tcb->snd.una;
-
+	if( seq_gt(seg->ack, tcb->snd.wl2)
+	||  (tcb->snd.wl2 == seg->ack && seg->wnd > tcb->snd.wnd)){
 		tcb->snd.wnd = seg->wnd;
-		tcb->snd.wl1 = seg->seq;
 		tcb->snd.wl2 = seg->ack;
 	}
 
+
 	if(!seq_gt(seg->ack, tcb->snd.una))
 		return;
 
@@ -1738,19 +1732,6 @@ tcpoutput(Conv *s)
 		if((tcb->flags&FORCE) == 0)
 			break;
 
-		/* avoid sending short packets unless... */
-		if(dsize != 0) {
-			/* ...we have a full segment */
-			if(dsize != tcb->mss)
-			/* ...the data was just queued */
-			if((dsize + sent) != sndcnt)
-			/* ...we're being forced */
-			if(!(tcb->flags&FORCE))
-			/* ...we have at least half a window's worth to send */
-			if(dsize < tcb->snd.wnd/2 || tcb->snd.wnd == 0)
-				return;
-		}
-
 		tcphalt(tpriv, &tcb->acktimer);
 
 		tcb->flags &= ~FORCE;
@@ -2075,7 +2056,6 @@ procsyn(Conv *s, Tcp *seg)
 
 	tcb->rcv.nxt = seg->seq + 1;
 	tcb->rcv.urg = tcb->rcv.nxt;
-	tcb->snd.wl1 = seg->seq;
 	tcb->irs = seg->seq;
 	tcb->snd.wnd = seg->wnd;
 
diff --git a/pc/etherwavelan.c b/pc/etherwavelan.c
index a795c5861fec208624401692571b7c3fd6ae22d9..10aec6492615b25cc3c084a671fb38b60c4e3e63 100644
--- a/pc/etherwavelan.c
+++ b/pc/etherwavelan.c
@@ -1019,7 +1019,6 @@ static long
 ctl(Ether* ether, void* buf, long n)
 {
 	int i;
-	char *p;
 	Ctlr *ctlr;
 	Cmdbuf *cb;
 
@@ -1047,13 +1046,13 @@ ctl(Ether* ether, void* buf, long n)
 		strncpy(ctlr->nodename, cb->f[1], WNameLen);
 	else if(strcmp(cb->f[0], "chan") == 0){
 		i = atoi(cb->f[1]);
-		if (i < 1 || i > 16 )
+		if(i < 1 || i > 16 )
 			error("invalid wavelan channel");
 		ctlr->chan = i;
 	}
 	else if(strcmp(cb->f[0], "ptype") == 0){
 		i = atoi(cb->f[1]);
-		if (i < 1 || i > 3 )
+		if(i < 1 || i > 3 )
 			error("invalid wavelan port type");
 		ctlr->ptype = i;
 	}