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Diffstat (limited to 'templates/protocols/static/arp/node.def')
| -rw-r--r-- | templates/protocols/static/arp/node.def | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/templates/protocols/static/arp/node.def b/templates/protocols/static/arp/node.def new file mode 100644 index 00000000..cf028611 --- /dev/null +++ b/templates/protocols/static/arp/node.def @@ -0,0 +1,43 @@ +# +# Vyatta configuration template for protocols.static.arp +# +# Author: Bob Gilligan (gilligan@vyatta.com) +# + +tag: + +type: ipv4 + +help: Set a static ARP translation + +comp_help: Possible completions: + <ipv4>\tIPv4 destination address + +# +# All the work is done here in the "end:" tag. There are four possible cases: +# +# 1) A new node and possibly sub-tree with hwaddr has been created +# 2) Value of hwaddr node in sub-tree has been changed +# 3) The hwaddr node in sub-tree has been deleted +# 4) This node (and hence entire sub-tree) has been deleted +# +# The flow is the same in all cases. First, we delete any +# previous static ARP translation that may be in place for this +# IP addr. This will typically fail in case (1) and in case (4) if the +# hwaddr node had been previously deleted. Then, if a hwaddr is defined, +# we add a new startic ARP translation for this IP addr pointing to that +# hwaddr. This should always succeed, so we don't try to hide error +# messages from the user. +# +# We always force a successful return in order to prevent transient +# failures of the "arp" command from failing the commit. +# +end: + ipaddr=$VAR(@) + hwaddr=$VAR(hwaddr/@) + + arp -d $ipaddr > /dev/null + if [ -n "$hwaddr" ]; then + arp -s $ipaddr $hwaddr + fi + exit 0
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