package/network/config/netifd/files/lib/netifd/proto/dhcp.sh

   1 #!/bin/sh
   2
   3 [ -L /sbin/udhcpc ] || exit 0
   4
   5 . /lib/functions.sh
   6 . ../netifd-proto.sh
   7 init_proto "$@"
   8
   9 proto_dhcp_init_config() {
  10         renew_handler=1
  11
  12         proto_config_add_string 'ipaddr:ipaddr'
  13         proto_config_add_string 'hostname:hostname'
  14         proto_config_add_string clientid
  15         proto_config_add_string vendorid
  16         proto_config_add_boolean 'broadcast:bool'
  17         proto_config_add_boolean 'release:bool'
  18         proto_config_add_string 'reqopts:list(string)'
  19         proto_config_add_boolean 'defaultreqopts:bool'
  20         proto_config_add_string iface6rd
  21         proto_config_add_array 'sendopts:list(string)'
  22         proto_config_add_boolean delegate
  23         proto_config_add_string zone6rd
  24         proto_config_add_string zone
  25         proto_config_add_string mtu6rd
  26         proto_config_add_string customroutes
  27         proto_config_add_boolean classlessroute
  28 }
  29
  30 proto_dhcp_add_sendopts() {
  31         [ -n "$1" ] && append "$3" "-x $1"
  32 }
  33
  34 proto_dhcp_setup() {
  35         local config="$1"
  36         local iface="$2"
  37
  38         local ipaddr hostname clientid vendorid broadcast release reqopts defaultreqopts iface6rd sendopts delegate zone6rd zone mtu6rd customroutes classlessroute
  39         json_get_vars ipaddr hostname clientid vendorid broadcast release reqopts defaultreqopts iface6rd delegate zone6rd zone mtu6rd customroutes classlessroute
  40
  41         local opt dhcpopts
  42         for opt in $reqopts; do
  43                 append dhcpopts "-O $opt"
  44         done
  45
  46         json_for_each_item proto_dhcp_add_sendopts sendopts dhcpopts
  47
  48         [ -z "$hostname" ] && hostname="$(cat /proc/sys/kernel/hostname)"
  49         [ "$hostname" = "*" ] && hostname=
  50
  51         [ "$defaultreqopts" = 0 ] && defaultreqopts="-o" || defaultreqopts=
  52         [ "$broadcast" = 1 ] && broadcast="-B" || broadcast=
  53         [ "$release" = 1 ] && release="-R" || release=
  54         [ -n "$clientid" ] && clientid="-x 0x3d:${clientid//:/}" || clientid="-C"
  55         [ -n "$iface6rd" ] && proto_export "IFACE6RD=$iface6rd"
  56         [ "$iface6rd" != 0 -a -f /lib/netifd/proto/6rd.sh ] && append dhcpopts "-O 212"
  57         [ -n "$zone6rd" ] && proto_export "ZONE6RD=$zone6rd"
  58         [ -n "$zone" ] && proto_export "ZONE=$zone"
  59         [ -n "$mtu6rd" ] && proto_export "MTU6RD=$mtu6rd"
  60         [ -n "$customroutes" ] && proto_export "CUSTOMROUTES=$customroutes"
  61         [ "$delegate" = "0" ] && proto_export "IFACE6RD_DELEGATE=0"
  62         # Request classless route option (see RFC 3442) by default
  63         [ "$classlessroute" = "0" ] || append dhcpopts "-O 121"
  64
  65         proto_export "INTERFACE=$config"
  66         proto_run_command "$config" udhcpc \
  67                 -p /var/run/udhcpc-$iface.pid \
  68                 -s /lib/netifd/dhcp.script \
  69                 -f -t 0 -i "$iface" \
  70                 ${ipaddr:+-r $ipaddr} \
  71                 ${hostname:+-x "hostname:$hostname"} \
  72                 ${vendorid:+-V "$vendorid"} \
  73                 $clientid $defaultreqopts $broadcast $release $dhcpopts
  74 }
  75
  76 proto_dhcp_renew() {
  77         local interface="$1"
  78         # SIGUSR1 forces udhcpc to renew its lease
  79         local sigusr1="$(kill -l SIGUSR1)"
  80         [ -n "$sigusr1" ] && proto_kill_command "$interface" $sigusr1
  81 }
  82
  83 proto_dhcp_teardown() {
  84         local interface="$1"
  85         proto_kill_command "$interface"
  86 }
  87
  88 add_protocol dhcp