external/bsd/dhcp/bin/clientscript/dhclient-script

   1 #!/bin/sh
   2 #
   3 # $NetBSD: dhclient-script,v 1.2 2015/02/26 09:59:55 roy Exp $
   4
   5 ENTERHOOKS=/etc/dhclient-enter-hooks
   6 EXITHOOKS=/etc/dhclient-exit-hooks
   7 RESOLV=/etc/resolv.conf
   8 SIGNATURE="# Created by dhclient from"
   9 INTSIG="$SIGNATURE $interface"
  10
  11 echo_resolv_conf() {
  12         echo "$INTSIG"
  13         echo search $new_domain_name
  14         for nameserver in $new_domain_name_servers; do
  15                 echo nameserver $nameserver
  16         done
  17 }
  18
  19 make_resolv_conf() {
  20         if [ ! -z "$new_domain_name_servers" ]; then
  21                 if [ -x /sbin/resolvconf ]; then
  22                         echo_resolv_conf | /sbin/resolvconf -a $interface
  23                 else
  24                         if [ -f $RESOLV ]; then
  25                                 while read line; do
  26                                         case $line in
  27                                         "$SIGNATURE"*)
  28                                                 ;;
  29                                         *)
  30                                                 mv $RESOLV $RESOLV.save;;
  31                                         esac
  32                                         break
  33                                 done < $RESOLV
  34                         fi
  35                         echo_resolv_conf > $RESOLV
  36                 fi
  37         fi
  38 }
  39
  40 restore_resolv_conf() {
  41         if [ -x /sbin/resolvconf ]; then
  42                 /sbin/resolvconf -d $interface
  43         elif [ -f $RESOLV.save -a -f $RESOLV ]; then
  44                 while read line; do
  45                         case $line in
  46                         "$INTSIG"*)
  47                                 mv $RESOLV.save $RESOLV;;
  48                         esac
  49                         break
  50                 done < $RESOLV
  51         fi
  52 }
  53
  54 # Must be used on exit.   Invokes the local dhcp client exit hooks, if any.
  55 exit_with_hooks() {
  56         exit_status=$1
  57         if [ -f "$EXITHOOKS" ]; then
  58                 . "$EXITHOOKS"
  59         fi
  60         # probably should do something with exit status of the local script
  61         exit $exit_status
  62 }
  63
  64
  65 add_new_routes() {
  66         for router in $new_routers; do
  67                 route add default $router
  68         done >/dev/null 2>&1
  69
  70         set -- $new_static_routes
  71         while [ $# -gt 1 ]; do
  72                 route add $1 $2
  73                 shift; shift
  74         done
  75 }
  76
  77 delete_old_routes() {
  78         for router in $old_routers; do
  79                 route delete default $router
  80         done >/dev/null 2>&1
  81
  82         set -- $old_static_routes
  83         while [ $# -gt 1 ]; do
  84                 route delete $1 $2
  85                 shift; shift
  86         done
  87
  88         route -n flush -inet -llinfo -host
  89 }
  90
  91 # Invoke the local dhcp client enter hooks, if they exist.
  92 if [ -f $ENTERHOOKS ]; then
  93         exit_status=0
  94         . $ENTERHOOKS
  95         # allow the local script to abort processing of this state
  96         # local script must set exit_status variable to nonzero.
  97         if [ $exit_status -ne 0 ]; then
  98                 exit $exit_status
  99         fi
 100 fi
 101
 102 #if [ ! -z "$new_host_name" ]; then
 103 #       echo New Host Name: $new_host_name
 104 #fi
 105 #
 106 #if [ ! -z "$new_nis_domain" ]; then
 107 #       echo New NIS Domain: $new_nis_domain
 108 #fi
 109 #
 110 #if [ ! -z "$new_network_number" ]; then
 111 #       echo New Network Number: $new_network_number
 112 #fi
 113
 114 if [ ! -z "$new_broadcast_address" ]; then
 115 #       echo New Broadcast Address: $new_broadcast_address
 116         new_broadcast_arg="broadcast $new_broadcast_address"
 117 fi
 118
 119 if [ ! -z "$old_broadcast_address" ]; then
 120         old_broadcast_arg="broadcast $old_broadcast_address"
 121 fi
 122
 123 if [ ! -z "$new_subnet_mask" ]; then
 124         new_netmask_arg="netmask $new_subnet_mask"
 125 fi
 126
 127 if [ ! -z "$old_subnet_mask" ]; then
 128         old_netmask_arg="netmask $old_subnet_mask"
 129 fi
 130
 131 if [ ! -z "$alias_subnet_mask" ]; then
 132         alias_subnet_arg="netmask $alias_subnet_mask"
 133 fi
 134
 135 case "$reason" in
 136 MEDIUM)
 137         test -z "$medium" && exit_with_hooks 0
 138         eval "ifconfig $interface $medium"
 139         eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1
 140
 141         sleep 1
 142
 143         exit_with_hooks 0
 144         ;;
 145
 146 PREINIT)
 147         if [ ! -z "$alias_ip_address" ]; then
 148                 ifconfig $interface inet \
 149                     -alias $alias_ip_address >/dev/null 2>&1
 150         fi
 151
 152         ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
 153             broadcast 255.255.255.255 up
 154
 155         exit_with_hooks 0
 156         ;;
 157
 158 ARPCHECK|ARPSEND)
 159         exit_with_hooks 0
 160         ;;
 161
 162 BOUND|RENEW|REBIND|REBOOT)
 163         if [ ! -z "$new_nis_domain" ]; then
 164                 if type domainname > /dev/null 2>&1; then
 165                         domainname $new_nis_domain
 166                 fi
 167         fi
 168
 169         if type hostname > /dev/null 2>&1; then
 170                 if [ \( -z "$current_hostname" \) -o \
 171                     \( "x$new_host_name" = "x$old_hostname" \) ]; then
 172                         current_hostname=`hostname`
 173                 fi
 174                 if [ \( -z "$current_hostname" \) -o \
 175                     \( "x$new_host_name" != "x$old_hostname" \) ]; then
 176                         hostname $new_host_name
 177                 fi
 178         fi
 179
 180         if [ \( ! -z "$old_ip_address" \) -a \( ! -z "$alias_ip_address" \) -a \
 181             \( "x$alias_ip_address" != "x$old_ip_address" \) ]; then
 182                 ifconfig $interface inet \
 183                     -alias $alias_ip_address > /dev/null 2>&1
 184         fi
 185
 186         if [ \( ! -z "$old_ip_address" \) -a \
 187             \( "x$old_ip_address" != "x$new_ip_address" \) ]; then
 188                 eval "ifconfig $interface inet -alias $old_ip_address $medium"
 189                 delete_old_routes
 190         fi
 191
 192         if [ \( -z "$old_ip_address" \) -o \
 193             \( "x$old_ip_address" != "x$new_ip_address" \) -o \
 194             \( "x$reason" = "xBOUND" \) -o \( "x$reason" = "xREBOOT" \) ]; then
 195                 eval "ifconfig $interface inet $new_ip_address \
 196                     $new_netmask_arg $new_broadcast_arg $medium"
 197                 add_new_routes
 198         fi
 199
 200         if [ \( ! -z "$alias_ip_address" \) -a \
 201             \( "x$new_ip_address" != "x$alias_ip_address" \) ]; then
 202                 ifconfig $interface inet alias $alias_ip_address \
 203                     $alias_subnet_arg
 204         fi
 205         make_resolv_conf
 206         exit_with_hooks 0
 207         ;;
 208
 209 EXPIRE|FAIL|RELEASE|STOP)
 210         if [ ! -z "$old_nis_domain" ]; then
 211                 if type domainname > /dev/null 2>&1; then
 212                         # delete the old nis domain name
 213                         domainname ""
 214                 fi
 215         fi
 216
 217         if [ ! -z "$alias_ip_address" ]; then
 218                 ifconfig $interface inet -alias $alias_ip_address
 219         fi > /dev/null 2>&1
 220
 221         if [ ! -z "$old_ip_address" ]; then
 222                 eval "ifconfig $interface inet -alias $old_ip_address $medium"
 223                 delete_old_routes
 224
 225         fi
 226
 227         if [ ! -z "$alias_ip_address" ]; then
 228                 ifconfig $interface inet alias $alias_ip_address \
 229                     $alias_subnet_arg
 230         fi
 231
 232         restore_resolv_conf
 233         exit_with_hooks 0
 234         ;;
 235
 236 TIMEOUT)
 237         if [ ! -z "$alias_ip_address" ]; then
 238                 ifconfig $interface inet -alias $alias_ip_address
 239         fi > /dev/null 2>&1
 240
 241         if [ ! -z "$new_host_name" ]; then
 242                 if type hostname > /dev/null 2>&1; then
 243                         hostname $new_host_name
 244                 fi
 245         fi
 246
 247         if [ ! -z "$new_nis_domain" ]; then
 248                 if type domainname > /dev/null 2>&1; then
 249                         domainname $new_nis_domain
 250                 fi
 251         fi
 252
 253         eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
 254             $new_broadcast_arg $medium"
 255         sleep 1
 256
 257         if [ ! -z "$new_routers" ]; then
 258                 set -- $new_routers
 259                 if ping -n -q -c 1 -w 1 $1; then
 260                         if [ \( ! -z "$alias_ip_address" \) -a \
 261                             \( "x$new_ip_address" != "x$alias_ip_address" \) ]
 262                         then
 263                                 ifconfig $interface inet alias \
 264                                     $alias_ip_address $alias_subnet_arg
 265                         fi
 266
 267                         add_new_routes
 268                         make_resolv_conf
 269                         exit_with_hooks 0
 270                 fi
 271         fi
 272
 273         eval "ifconfig $interface inet -alias $new_ip_address $medium"
 274
 275         delete_old_routes
 276
 277         exit_with_hooks 1
 278         ;;
 279 *)
 280         exit_with_hooks 0
 281         ;;
 282 esac