X-Git-Url: https://git.distorted.org.uk/~mdw/tripe/blobdiff_plain/5b968d5e4aa26455c3ac7ac9fa3824c254994232..0fc1588c95b568da6c6153e556ef98d3473646ff:/svc/tripe-ifup.in

diff --git a/svc/tripe-ifup.in b/svc/tripe-ifup.in
index ae447db8..80a315b7 100644
--- a/svc/tripe-ifup.in
+++ b/svc/tripe-ifup.in
@@ -25,6 +25,18 @@ export PATH TRIPEDIR
 if [ -d /proc/sys/net/ipv6 ]; then have6=t; else have6=nil; fi
 
 ###--------------------------------------------------------------------------
+### Error handling.
+
+win=t
+try () {
+  if "$@"; then :; else
+    rc=$?
+    tripectl warn tripe-ifup command-failed rc=$rc "$*"
+    win=nil
+  fi
+}
+
+###--------------------------------------------------------------------------
 ### Collect arguments.
 
 ## Collect the simple arguments.
@@ -46,7 +58,7 @@ esac
 
 case "${P_IFNAME+set}" in
   set)
-    ip link set "$ifname" name "$P_IFNAME"
+    try ip link set "$ifname" name "$P_IFNAME"
     ifname=$P_IFNAME
     $tripectl setifname "$peer" "$ifname"
     ;;
@@ -80,13 +92,13 @@ haveaddr4=nil
 set -- $l4addr
 case $#,${r4addr+set} in
   [1-9]*,set)
-    ip addr add "$1" peer "$r4addr" dev "$ifname"
+    try ip addr add "$1" peer "$r4addr" dev "$ifname"
     haveaddr4=t
     shift
     ;;
 esac
 for a in "$@"; do
-  ip addr add "$a" dev "$ifname"
+  try ip addr add "$a" dev "$ifname"
   haveaddr4=t
 done
 
@@ -96,13 +108,17 @@ 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
-      ip addr add "$a" dev "$ifname"
+      try ip addr add "$a" dev "$ifname"
       haveaddr6=t
     done
-    case ${r6addr+set} in
-      set) ip route add $r6addr proto static dev "$ifname" ;;
-    esac
     ;;
 esac
 
@@ -121,7 +137,19 @@ case $haveaddr4,$haveaddr6 in
 	mtu=$(expr "$pathmtu" - 29 - $A_BULK_OVERHEAD)
 	;;
     esac
-    ip link set dev "$ifname" up mtu "$mtu"
+    try ip link set dev "$ifname" up mtu "$mtu"
+    ;;
+esac
+
+###--------------------------------------------------------------------------
+### Set the peer IPv6 address if any.
+
+## IPv6 point-to-point links seem broken in Linux.  Attach the local and
+## remote addresses by hand.
+set -- $l6addr
+case $have6,$#,${r6addr+set} in
+  t,[1-9]*,set)
+    try ip route add $r6addr proto static dev "$ifname"
     ;;
 esac
 
@@ -142,7 +170,7 @@ set -- $route4
 case $haveaddr4,$# in
   t,[1-9]*)
     for p in "$@"; do
-      ip route add $p proto static via "$r4addr"
+      try ip route add $p proto static via "$r4addr"
     done
     ;;
 esac
@@ -152,7 +180,7 @@ set -- $route6
 case $haveaddr6,$# in
   t,[1-9]*)
     for p in "$@"; do
-      ip route add $p proto static via "${r6addr%/*}"
+      try ip route add $p proto static via "${r6addr%/*}"
     done
     ;;
 esac
@@ -169,6 +197,9 @@ esac
 ###--------------------------------------------------------------------------
 ### Issue a notification that we've won.
 
-$tripectl notify tripe-ifup configured "$peer"
+case $win in
+  t) $tripectl notify tripe-ifup configured "$peer" ;;
+  nil) $tripectl notify tripe-ifup configured "$peer" failed ;;
+esac
 
 ###----- That's all, folks --------------------------------------------------