etc/dhcpcd/dhcpcd-hooks/20-dns.conf

   1 # Set net.<iface>.dnsN properties that contain the
   2 # DNS server addresses given by the DHCP server.
   3
   4 if [[ $interface == p2p* ]]
   5     then
   6     intf=p2p
   7     else
   8     intf=$interface
   9 fi
  10
  11 set_dns_props()
  12 {
  13     case "${new_domain_name_servers}" in
  14     "")   return 0;;
  15     esac
  16
  17     count=1
  18     for i in 1 2 3 4; do
  19         setprop dhcp.${intf}.dns${i} ""
  20     done
  21
  22     count=1
  23     for dnsaddr in ${new_domain_name_servers}; do
  24         setprop dhcp.${intf}.dns${count} ${dnsaddr}
  25         count=$(($count + 1))
  26     done
  27
  28     separator=" "
  29     if [ -z "$new_domain_name" ]; then
  30        separator=""
  31     else
  32         if [ -z "$new_domain_search" ]; then
  33             separator=""
  34         fi
  35     fi
  36     setprop dhcp.${interface}.domain "${new_domain_name}$separator${new_domain_search}"
  37 }
  38
  39 unset_dns_props()
  40 {
  41     for i in 1 2 3 4; do
  42         setprop dhcp.${intf}.dns${i} ""
  43     done
  44
  45     setprop dhcp.${interface}.domain ""
  46 }
  47
  48 case "${reason}" in
  49 BOUND|INFORM|REBIND|REBOOT|RENEW|TIMEOUT)       set_dns_props;;
  50 EXPIRE|FAIL|IPV4LL|RELEASE|STOP)                unset_dns_props;;
  51 esac