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