[Dnsmasq-discuss] dhcp-helper and dnsmasq coexist problem

[Jerry]

Hello, 
  I want to run dhcp-helper and dnsmasq at same time in my device which have 
multiple bridges. for example, br0 get ip address from DNSMASQ, and br1 get ip 
from another dhcp server through dhcp relay.
  There are something happened, I use the -p option in dhcp-helper for 
alternative port 1067/1068, but dhcp-helper can't work normally. I try to 
redirect port to 1067 in NAT PREROUTING chain, but I can't see the DHCP 
DISCOVERY packets at the filter INPUT chain. Where are the packets going?
  How can I let dhcp-helper and dnsmasq coexist in my device?