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create or replace function inet_aton(ip text) returns int8 as $$
declare
v int;
res int8 :=0;
i int :=3;
begin
foreach v in array string_to_array(ip,'.') loop
res := res+v*(256^i);
i :=i-1;
end loop;
return res;
end;
$$ language plpgsql;
create or replace function inet_ntoa(ip int8) returns text as $$
declare
res text :='';
begin
res := res || ((ip >> 24) & (2^8-1)::int);
res :=res || '.' || ((ip >> 16) & (2^8-1)::int);
res :=res || '.' || ((ip >> 8) & (2^8-1)::int);
res :=res || '.' || (ip & (2^8-1)::int);
return res;
end;
$$ language plpgsql;
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