ipv6/wide-dhcpv6/files/dhcp6c.init

   1 #!/bin/sh /etc/rc.common
   2
   3 DHCP6C_REQUEST_OPTIONS='domain_name_servers domain_name ntp_servers sip_server_address sip_domain_name nis_server_address nis_domain_name nisp_server_address nisp_domain_name bcmcs_server_address bcmcs_domain_name'
   4
   5 get_ifname() {
   6         local interface=$1
   7         local ifname
   8         scan_interfaces
   9         config_get ifname "$interface" ifname
  10         printf '%s\n' "$ifname"
  11         return 0
  12 }
  13
  14 get_device() {
  15         local interface=$1
  16         local ifname=$2
  17         local device
  18         scan_interfaces
  19         config_get device "$interface" device
  20         grep -qE "^ *$device:" /proc/net/dev && \
  21                 printf '%s\n' "$device" || \
  22                 printf '%s\n' "$ifname"
  23         return 0
  24 }
  25
  26 dhcp6c_write_duid() {
  27         local mac="${1:-$(ifconfig "$client_device" | sed -ne 's/[[:space:]]*$//; s/.*HWaddr //p')}"
  28         local pat="[0-9A-F][0-9A-F]"
  29
  30         case "$mac" in
  31                 # exactly 6 octets -> assume type 3 (DUID-LL - RFC3315, 9.4)
  32                 $pat:$pat:$pat:$pat:$pat:$pat)
  33                         local oIFS="$IFS"; IFS=":"; set -- $mac; IFS="$oIFS"
  34
  35                         # low endian
  36                         if [ "$(printf \\1 | hexdump -n1 -ve '8/2 "%04x"')" = "0001" ]; then
  37                                 printf \\x0a\\x00
  38
  39                         # big endian
  40                         else
  41                                 printf \\x00\\x0a
  42                         fi
  43
  44                         printf \\x00\\x03\\x00\\x06\\x$1\\x$2\\x$3\\x$4\\x$5\\x$6
  45                         logger -t dhcp6c "Using MAC address DUID 00:03:00:06:$1:$2:$3:$4:$5:$6"
  46                 ;;
  47                 # at least 7 octets -> could be type 1 or type 2
  48                 $pat:$pat:$pat:$pat:$pat:$pat:*)
  49                         local len_id=":$(echo "$mac" | sed -e 's/[^:]//g')"
  50                         local len_hi=$(printf "%02x" $((${#len_id} / 0xFF)) )
  51                         local len_lo=$(printf "%02x" $((${#len_id} % 0xFF)) )
  52
  53                         # low endian
  54                         if [ "$(printf \\1 | hexdump -n1 -ve '8/2 "%04x"')" = "0001" ]; then
  55                                 printf \\x$len_lo\\x$len_hi
  56
  57                         # big endian
  58                         else
  59                                 printf \\x$len_hi\\x$len_lo
  60                         fi
  61
  62                         printf $(echo "$mac" | sed -e 's/^/\\x/; s/:/\\x/g')
  63                         logger -t dhcp6c "Using user provided DUID $mac"
  64                 ;;
  65                 *)
  66                         logger -t dhcp6c "Unable to derive DUID from interface '$client_device' and no valid user DUID given"
  67                 ;;
  68         esac
  69 }
  70
  71 dhcp6c_write_interface() {
  72         local cfg=$1
  73         local sla_id
  74         local sla_len
  75         local enabled
  76
  77         config_get_bool enabled "$cfg" enabled 0
  78
  79         if [ $enabled -ne 0 ]; then
  80                 config_get sla_id "$cfg" sla_id
  81                 config_get sla_len "$cfg" sla_len
  82
  83                 printf '\tprefix-interface %s {\n' "$(get_ifname $cfg)"
  84                 printf '\t\tsla-id %s;\n' "$sla_id"
  85                 printf '\t\tsla-len %s;\n' "$sla_len"
  86                 printf '\t};\n'
  87         fi
  88 }
  89
  90 dhcp6c_write_request() {
  91         printf '\trequest %s;\n' $1 | sed -e s/_/-/g
  92 }
  93
  94 dhcp6c_write_config() {
  95         local pd
  96         local na
  97         config_get_bool pd basic pd 0
  98         config_get_bool na basic na 0
  99
 100         printf 'interface %s {\n' "$client_ifname"
 101
 102         if [ $pd -ne 0 ]; then
 103                 printf '\tsend ia-pd 0;\n'
 104         fi
 105
 106         if [ $na -ne 0 ]; then
 107                 printf '\tsend ia-na 0;\n'
 108         fi
 109
 110         local rapid_commit
 111         config_get_bool rapid_commit basic rapid_commit 0
 112         [ $rapid_commit -ne 0 ] && printf '\tsend rapid-commit;\n'
 113
 114         local script
 115         config_get script basic script
 116         [ "$script" != "" ] && printf '\tscript "%s";\n' "$script"
 117
 118         local request
 119         local value
 120         for request in $DHCP6C_REQUEST_OPTIONS; do
 121                 config_get_bool value basic "$request" 0
 122                 [ $value -ne 0 ] && dhcp6c_write_request "$request"
 123         done
 124
 125         printf '};\n\n'
 126
 127         if [ $pd -ne 0 ]; then
 128                 printf 'id-assoc pd 0 {\n'
 129                 config_foreach dhcp6c_write_interface interface
 130                 printf '};\n\n'
 131         fi
 132
 133         if [ $na -ne 0 ]; then
 134                 printf 'id-assoc na 0 {\n'
 135                 printf '};\n\n'
 136         fi
 137
 138         return 0
 139 }
 140
 141 start() {
 142         [ ! -e /etc/dhcp6cctlkey ] && `dd if=/dev/urandom count=1 2> /dev/null | md5sum | cut -d" " -f1 > /etc/dhcp6cctlkey`
 143
 144         [ -e /var/run/dhcp6c.pid ] && return 0
 145
 146         include /lib/network
 147
 148         config_load "dhcp6c"
 149
 150         local enabled
 151         config_get_bool enabled basic enabled 0
 152         [ $enabled -eq 0 ] && return 0
 153
 154         local user_duid
 155         config_get user_duid basic duid
 156
 157         logger -t dhcp6c starting dhcp6c
 158
 159         local client_interface
 160         config_get client_interface basic interface
 161         local client_ifname=$(get_ifname "$client_interface")
 162         local client_device=$(get_device "$client_interface" "$client_ifname")
 163
 164         local config_file="/var/etc/dhcp6c.conf"
 165         local duid_file="/var/dhcp6c_duid"
 166         mkdir -m 755 -p /var/etc
 167         dhcp6c_write_config > $config_file
 168         dhcp6c_write_duid "$user_duid" > $duid_file
 169
 170         local debug
 171         local debug_option
 172         config_get_bool debug basic debug 0
 173         [ $debug -eq 1 ] && debug_option="-D"
 174         /usr/sbin/dhcp6c -c $config_file $debug_option $client_ifname
 175
 176         sleep 3
 177         ACTION=start /sbin/hotplug-call dhcp6c
 178
 179         return 0
 180 }
 181
 182 stop() {
 183         logger -t dhcp6c stopping dhcp6c
 184         service_kill dhcp6c /var/run/dhcp6c.pid
 185         rm -f /var/etc/dhcp6c.conf /var/run/dhcp6c.pid
 186         ACTION=stop /sbin/hotplug-call dhcp6c
 187         return 0
 188 }
 189
 190