X-Git-Url: https://git.distorted.org.uk/~mdw/tripe/blobdiff_plain/49bfe6a28c92c377a3c5227b0b6bd45053c18cef..6aa21132b259c53b0cba8e9edc95a848339b73d9:/svc/tripe-ifup.in

diff --git a/svc/tripe-ifup.in b/svc/tripe-ifup.in
index e92c0fd5..e9e9cb92 100644
--- a/svc/tripe-ifup.in
+++ b/svc/tripe-ifup.in
@@ -46,11 +46,16 @@ fi
 peer=$1 ifname=$2 family=$3; shift 3
 
 ## Parse the address family.
+case "$family" in
+  INET) ipsz=20 ;;
+  INET6) ipsz=40 ;;
+  *) echo >&2 "$0: unknown address family $family"; exit 1 ;;
+esac
 case "$family,$#" in
-  INET,1) addr=$1 port=4070 ;;
-  INET,2) addr=$1 port=$2 ;;
-  INET,*) echo >&2 "$0: bad INET address"; exit 1 ;;
-  *)      echo >&2 "$0: unknown address family $family"; exit 1 ;;
+  INET,1 | INET6,1) addr=$1 port=4070 ;;
+  INET,2 | INET6,2) addr=$1 port=$2 ;;
+  INET,* | INET6,*) echo >&2 "$0: bad $family address"; exit 1 ;;
+  *) echo >&2 "$0: unknown address family $family"; exit 1 ;;
 esac
 
 ###--------------------------------------------------------------------------
@@ -108,6 +113,13 @@ haveaddr6=nil
 set -- $l6addr
 case $have6,$# in
   t,[1-9]*)
+
+    ## If we're configured to set IPv6 addresses then we should ensure that
+    ## they're going to work, even if the default setting for new interfaces
+    ## is to disable IPv6.
+    try sysctl -q net.ipv6.conf."$ifname".disable_ipv6=0
+
+    ## Now add the source and destination addresses.
     for a in "$@"; do
       try ip addr add "$a" dev "$ifname"
       haveaddr6=t
@@ -130,7 +142,7 @@ case $haveaddr4,$haveaddr6 in
 	mtu=$P_MTU;;
       *)
 	pathmtu=$(pathmtu "$addr")
-	mtu=$(expr "$pathmtu" - 29 - $A_BULK_OVERHEAD)
+	mtu=$(( $pathmtu - $ipsz - 9 - $A_BULK_OVERHEAD ))
 	;;
     esac
     try ip link set dev "$ifname" up mtu "$mtu"