From 611eb50aea000e16907a9e0cf58fa5ccce6aee34 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 30 Mar 1998 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1998-03-30

---
 ip/ipifc.c     | 21 +++++++++++++++++++++
 ip/pktmedium.c |  4 ++--
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/ip/ipifc.c b/ip/ipifc.c
index 4fed051e7b3abc1c4332d6ee06e985bd2d5b8a0e..f17e42e18984fffa57112473ae13b153f5fe156e 100644
--- a/ip/ipifc.c
+++ b/ip/ipifc.c
@@ -285,6 +285,25 @@ ipifcclose(Conv *c)
 	unlock(c);
 }
 
+/*
+ *  change an interface's mtu
+ */
+char*
+ipifcsetmtu(Ipifc *ifc, char **argv, int argc)
+{
+	int mtu;
+
+	if(argc < 2)
+		return Ebadarg;
+	if(ifc->m == nil)
+		return Ebadarg;
+	mtu = strtoul(argv[1], 0, 0);
+	if(mtu < ifc->m->minmtu || mtu > ifc->m->maxmtu)
+		return Ebadarg;
+	ifc->maxmtu = mtu;
+	return nil;
+}
+
 /*
  *  add an address to an interface.
  */
@@ -566,6 +585,8 @@ ipifcctl(Conv* c, char**argv, int argc)
 		return ipifcjoinmulti(ifc, argv, argc);
 	else if(strcmp(argv[0], "leavemulti") == 0)
 		return ipifcleavemulti(ifc, argv, argc);
+	else if(strcmp(argv[0], "mtu") == 0)
+		return ipifcsetmtu(ifc, argv, argc);
 	else if(strcmp(argv[0], "iprouting") == 0){
 		i = 1;
 		if(argc > 1)
diff --git a/ip/pktmedium.c b/ip/pktmedium.c
index 4da21e2e2d537b4241bba4f037da259a4845d1fc..6dc1a2ba336232551b66c3324efa10ba8193829b 100644
--- a/ip/pktmedium.c
+++ b/ip/pktmedium.c
@@ -18,8 +18,8 @@ Medium pktmedium =
 {
 	"pkt",
 	14,
-	60,
-	1514,
+	40,
+	4*1024,
 	6,
 	pktbind,
 	pktunbind,