Is there any DHCP Snooping option or module?

Installing and Using OpenWrt Network and Wireless Configuration
1

Hello folks, i'm wondering if there is any DHCP snooping option or module that i can use on OpenWRT, i have a NanoPi R2S with a TL-SG105E that i setup to work with separated VLANS on all ports, i saw that there is an option in the DHCP server section under Interfaces that you can set it as a trusted server.

2

isn't tcpdump good enough ?

3

I want DHCP Snooping to deal with rogue dhcp servers on my network, another question that i have is if i need to create a Software VLAN and then a interface for my trunk vlan, because i can access isolated vlans from openwrt lan.