diff options
| -rw-r--r-- | doc/netwatch-notify.md | 6 | ||||
| -rw-r--r-- | netwatch-notify.rsc | 9 |
2 files changed, 12 insertions, 3 deletions
diff --git a/doc/netwatch-notify.md b/doc/netwatch-notify.md index 6925ca5..a7cc2d6 100644 --- a/doc/netwatch-notify.md +++ b/doc/netwatch-notify.md @@ -83,9 +83,9 @@ with a resolvable name: /tool/netwatch/add comment="notify, name=example.com, resolve=example.com"; -This supports multiple A or AAAA records for a name just fine, but be -warned: A CNAME to multiple records will cause a high rate of configuration -changes (and flash writes)! +This supports multiple A or AAAA records for a name just fine, even a CNAME +to those. But be warned: CNAME chains to multiple records will cause a high +rate of configuration changes (and flash writes)! ### No notification on host down diff --git a/netwatch-notify.rsc b/netwatch-notify.rsc index 1b6a005..cd4fc0d 100644 --- a/netwatch-notify.rsc +++ b/netwatch-notify.rsc @@ -62,6 +62,15 @@ :return true; } + :local Cname [ /ip/dns/cache/find where name=$Name type="CNAME" ]; + :if ([ :len $Cname ] > 0) do={ + :set Cname [ /ip/dns/cache/get $Cname data ]; + :set Cname [ :pick $Cname 0 ([ :len $Cname ] - 1) ]; + :if ([ :len [ /ip/dns/cache/find where name=$Cname data=$Expected ] ] > 0) do={ + :return true; + } + } + :return false; } |