From c89376ede14f73a295fec4a0bf73df786dcf3193 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 6 Jan 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-01-06

---
 port/devip.c    | 2 ++
 port/stil.c     | 8 +++++---
 port/tcpinput.c | 6 ++++++
 power/mmu.c     | 4 +---
 4 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/port/devip.c b/port/devip.c
index 2681e2f95f5373ddae8631e15878e5dfea0be397..3f0ff5b68585cae393c03685a9eae9fbe1e20d82 100644
--- a/port/devip.c
+++ b/port/devip.c
@@ -429,6 +429,8 @@ udpstoput(Queue *q, Block *bp)
 	ptcllen = dlen + (UDP_HDRSIZE-UDP_PHDRSIZE);
 	uh->Unused = 0;
 	uh->udpproto = IP_UDPPROTO;
+	uh->frag[0] = 0;
+	uh->frag[1] = 0;
 	hnputs(uh->udpplen, ptcllen);
 	hnputl(uh->udpdst, ipc->dst);
 	hnputl(uh->udpsrc, Myip);
diff --git a/port/stil.c b/port/stil.c
index 1848811ff36a923f4ae69bd7ee396565adb76f94..41ee9bba86e39a7f2054f3b4e79bea5afae53dbd 100644
--- a/port/stil.c
+++ b/port/stil.c
@@ -152,6 +152,8 @@ iloput(Queue *q, Block *bp)
 	ih = (Ilhdr *)(bp->rptr);
 
 	/* Ip fields */
+	ih->frag[0] = 0;
+	ih->frag[1] = 0;
 	hnputl(ih->src, Myip);
 	hnputl(ih->dst, ipc->dst);
 	ih->proto = IP_ILPROTO;
@@ -292,7 +294,7 @@ ilrcvmsg(Ipconv *ipc, Block *bp)
 			ic = &new->ilctl;
 			ic->state = Ilsyncee;
 			initseq += TK2MS(MACHP(0)->ticks);
-			ic->start = initseq;
+			ic->start = initseq & 0xffffff;
 			ic->next = ic->start+1;
 			ic->recvd = 0;
 			ic->rstart = nhgetl(ih->ilid);
@@ -467,7 +469,7 @@ _ilprocess(Ipconv *s, Ilhdr *h, Block *bp)
 void
 ilrexmit(Ilcb *ic)
 {
-	Block *nb;
+	Block *nb, *bp;
 	Ilhdr *h;
 
 	nb = 0;
@@ -750,7 +752,7 @@ ilstart(Ipconv *ipc, int type, int window)
 
 
 	initseq += TK2MS(MACHP(0)->ticks);
-	ic->start = initseq;
+	ic->start = initseq & 0xffffff;
 	ic->next = ic->start+1;
 	ic->recvd = 0;
 	ic->window = window;
diff --git a/port/tcpinput.c b/port/tcpinput.c
index 313e5f2350efabca60e7fb4a7bdb875c53c5d187..c10a1a8b270811be00e14051e8c94adcd1b4a977 100644
--- a/port/tcpinput.c
+++ b/port/tcpinput.c
@@ -798,6 +798,8 @@ copyb(Block *bp, int count)
 		memmove(nb->wptr, bp->rptr, l);
 		nb->wptr += l;
 		count -= l;
+		if(bp->flags & S_DELIM)
+			nb->flags |= S_DELIM;
 		*p = nb;
 		p = &nb->next;
 		bp = bp->next;
@@ -810,10 +812,12 @@ copyb(Block *bp, int count)
 			panic("copyb.2");
 		memset(nb->wptr, 0, count);
 		nb->wptr += count;
+		nb->flags |= S_DELIM;
 		*p = nb;
 	}
 	if(blen(head) == 0)
 		print("copyb: zero length\n");
+
 	return head;
 }
 
@@ -964,6 +968,8 @@ htontcp(Tcp *tcph, Block *data, Tcphdr *ph)
 	
 	h = (Tcphdr *)(data->rptr);
 	h->proto = IP_TCPPROTO;
+	h->frag[0] = 0;
+	h->frag[1] = 0;
 	hnputs(h->tcplen, hdrlen + dlen);
 	hnputs(h->tcpsport, tcph->source);
 	hnputs(h->tcpdport, tcph->dest);
diff --git a/power/mmu.c b/power/mmu.c
index fa5a9eee320c7c597382df6336c511c1a1ee62a5..40308e38b2fb3d99d801af1a83bd31e5c2846bbb 100644
--- a/power/mmu.c
+++ b/power/mmu.c
@@ -156,9 +156,7 @@ void
 flushmmu(void)
 {
 	splhi();
-	/* easiest is to forget what pid we had.... */
-	memset(u->p->pidonmach, 0, sizeof u->p->pidonmach);
-	/* ....then get a new one by trying to map our stack */
+	u->p->newtlb = 1;
 	mapstack(u->p);
 	spllo();
 }