[Dnsmasq-discuss] i need dhcp-match to find a match for an encapsulated value

[Beta Tester]

hi,

i try to find the right syntax of dhcp-match to find a match for an dhcp option 175 with encapsualted option 235 with a specific value.

in wireshark the specific byte sequence of option 175 with the encapsulated option 235 looks like:
0xEB 0x03 0x01 0x15 0x01
the 1'st byte is the encap option value (235 = ipxe.version),
the 2'nd byte is the lengs of the encapsulated value (3 bytes),
the 3'rd, 4'th and 5'th byte is the version value (major, minor, revision)

i need a match for the byte values 0x01 0x15 0x01

i tried several combinations like:
dhcp-match=set:ipxe.version_1_21_1, 175, 235, 1b, 21b ,1b
dhcp-match=set:ipxe.version_1_21_1, 175, 235, 1:21:1
dhcp-match=set:ipxe.version_1_21_1, 175, 235, 01:15:01

with no luck...

or for an other option 175 with encapsulated option 16, the byte sequence looke like:
0x10 0x01 0x02

here i need a match for the value 0x02

but none of them seems to work.
i did not find a example in the man page, nor in the example dnsmasq.conf file nor in the FAQ.

i am only able to get match for, if an encap option exists or if it doe not exist:

dhcp-match=set:ipxe.pxeext,           175, 16
dhcp-match=set:ipxe.iscsi,            175, 17
dhcp-match=set:ipxe.aoe,              175, 18
dhcp-match=set:ipxe.http,             175, 19
...


but i need a match for a specific value in the encapulated option.
can somebody give me the right dhcp-match syntax for my needs?

thanks in advance.