[sr-dev] [kamailio/kamailio] Feature Request: Configure permissions module without database (#2037)

[Daniel-Constantin Mierla]

As another solution, when using KEMI, I did it by defining a local map/array and then looping and using ipops functions, like next one in Lua:

```
ALLOWADDR={
    "10.10.10.0/24",,
    "10.11.11.11/32"
};

function ksr_is_src_trusted()
    local srcaddr = KSR.pv.get("$si");
    for idx, val in pairs(ALLOWADDR) do
        if KSR.ipops.ip_is_in_subnet(srcaddr, val) > 0 then
            return true;
        end
    end
    return false;
end
```

Then reload Lua script.

Also, if you match on IP only, then you can use dispatcher module, there are functions to match addresses in a group.

Then, permissions module has functionality to work with text files, but I am not sure they map on trusted or address table, never used those features, but I expect to be something documented in the readme.

Finally, I actually considered to implement an embedded solution in the module to work with a text file for address matching (I am not using allow_trusted(), only allow_address()), but I didn't get there yet, finding other variants so far when I wanted to avoid database.

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