https://bugs.exim.org/show_bug.cgi?id=2072
Bug ID: 2072
Summary: Support network matching in single key lookups
Product: Exim
Version: N/A
Hardware: x86
OS: All
Status: NEW
Severity: wishlist
Priority: medium
Component: Lookups
Assignee: nigel@???
Reporter: andrew@???
CC: exim-dev@???
Hi
It would be very useful to be able to use:
${lookup{$sender_host_address}net-cdb{/tmp/ratelimit.cdb}{$value}{DEFAULT_RATE}}
Or
${lookup{$sender_host_address}cdb+{/tmp/ratelimit.cdb}{$value}{DEFAULT_RATE}}
In /tmp/ratelimit.cdb the keys would be ip addresses or ip networks in CIDR.
The search_find function would take an extra param indicating if it is a
network search (based on either the net- or the + which ever is choosen)
which in turn is passed to the lookup type via internal_search_find.
The lookup type then checks if the keystring is an IP address and performs
a ip_match instead of an equality match.
With the above you are then able to have keys such us 192.168.1.0/24
if $sender_host_address is in that network then the lookup would
return the $value
The only option to do this at the moment seems to be using a perl
routine.
The current net<number>-<single-key-search-type>;<search-data> lookup
for lists would not work in this scenario as the <number> needs to be
known/set in advance.
The suggested implementation would work without having to know which
networks are in <search-data>.
I am willing to work on this if there is agreement on the principle.
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