IP Address Value within a range

Question

I have this table:
GROUP_UID
GROUP_NAME
IP_VALUE_LOW
IP_VALUE_HIGH
It is used to control the grouping of ranges of IP Address. I need help on two things with this table. I am sure the solution to one will lead me to the other.
1. When given an IP_VALUE I need to return the GROUP_UID/NAME that IP_VALUE falls into. I can not use the normal between IP_VALUE_LOW and IP_VALUE_HIGH becuse the IP Value is not truly consecutive.
13150400 = 192.168.200.0
13150402 = 194.168.200.0 not 192.168.200.2
13150403 = 195.168.200.0 not 192.168.200.3
13150404 = 196.168.200.0 not 192.168.200.4
13150405 = 197.168.200.0 not 192.168.200.5
so 13150403 in not between 13150402 and 13150404
but 192.168.200.3 is between 192.168.200.2 and 192.168.200.4
2. A group is added or updated. I need to ensure that two groups do not overlap ranges.
Any Help would be great!!!

Answer 1

This is the funtion I use now to convert an IP Address to an IP Value:
FUNCTION IPAddressToIPValue2 (in_IPADDRESS VARCHAR2)
    return NUMBER
IS
    v_OCTET4 NUMBER;
    v_OCTET3 NUMBER;
    v_OCTET2 NUMBER;
    v_OCTET1 NUMBER;
    v_IP1 VARCHAR2(20);
    v_IP2 VARCHAR2(20);
    v_IP3 VARCHAR2(20);
    v_IP4 VARCHAR2(20);
BEGIN
    if length(in_IPADDRESS) > 15 then    
        return -3000000000;
    end if;
    select
        max(decode(portion,1,piece)),
        max(decode(portion,2,piece)),
        max(decode(portion,3,piece)),
        max(decode(portion,4,piece))
    into
        v_IP1,
        v_IP2,
        v_IP3,
        v_IP4
    from (
            select
                seq portion,
                substr('.'|| in_IPADDRESS ||'.',instr('.'|| in_IPADDRESS ||'.','.',1,seq)+1,
                instr('.'|| in_IPADDRESS ||'.','.',1,seq+1) - instr('.'|| in_IPADDRESS ||'.','.',1,seq) - 1) piece
            from (select 1 seq from dual union all select 2 from dual union all select 3 from dual union all select 4 from dual));
            v_OCTET4 := to_number(v_IP4);
            v_OCTET3 := to_number(v_IP3);
            v_OCTET2 := to_number(v_IP2);
            v_OCTET1 := to_number(v_IP1);           
            if v_OCTET1 not between 0 and 255 or v_OCTET2 not between 0 and 255 or v_OCTET3 not between 0 and 255 or v_OCTET4 not between 0 and 255 then
                return -3000000000;
            else
                 return
                 case
                     when v_OCTET4 < 127 then
                        v_OCTET4 * power(2,24) + v_OCTET3 * power(2,16) + v_OCTET2 * power(2,8) + v_OCTET1
                     else
                        v_OCTET4 * power(2,24) + v_OCTET3 * power(2,16) + v_OCTET2 * power(2,8) + v_OCTET1 - power(2,32)
                 end;          
            end if;
END IPAddressToIPValue2;would I just:
                 return
                 case
                     when v_OCTET4 < 127 then
                        v_OCTET1 + v_OCTET2 * power(2,8) + v_OCTET3 * power(2,16) + v_OCTET4 * power(2,24)
                     else
                        v_OCTET1 - power(2,32) + v_OCTET2 * power(2,8) + v_OCTET3 * power(2,16) + v_OCTET4 * power(2,24)
                 end;           Message was edited by:
Chris Wendell