To add some filter rules in conf file

[Ashmath Khan]

Hello,

I want to add some filter rules into the configuration file.
For example, If I find string "Amino" in the option dhcp-client-identifier,
then the range would be  A, options B and if the string is "Phone*" then the
range would be C and options D.
I tried this:
subnet 192.168.1.0 netmask 255.255.255.0 {
default-lease-time 86400;
max-lease-time 86400;
option routers 192.168.1.254;
option domain-name-servers 192.168.1.254;

if substring (option dhcp-client-identifier, 0, 5) = "Amino" {
range 192.168.1.64 192.168.1.253;
option time-offset -12345;
option boot-size 65000;
} elsif substring (option dhcp-client-identifier, 0, 5) = "Phone" {
range 192.168.1.66 192.168.1.253;
option time-servers 1.2.3.4,10.232.167.89;
option host-name "something.com";
ignore known-clients;
} else {
range 192.168.1.68 192.168.1.253;
option perform-mask-discovery false;
option policy-filter 3.4.5.6,255.255.255.0;
}

But its giving error:
/etc/dhcpd.conf line 8: right brace expected.
range
 ^
/etc/dhcpd.conf line 11: expecting a declaration
} elsif
 ^
/etc/dhcpd.conf line 16: expecting a declaration
} else
 ^
/etc/dhcpd.conf line 20: expecting a declaration
}
 ^
Configuration file errors encountered -- exiting


what could be the reason ? Or how do I put these in conf file ?
Thanks for help.

-Ashmath
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