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dhcp 4.1 r7

    1: #!/bin/sh
    2: 
    3: make_resolv_conf() {
    4:   if [ x"$new_domain_name_servers" != x ]; then
    5:     cat /dev/null > /etc/resolv.conf.dhclient
    6:     if [ x"$new_domain_search" != x ]; then
    7:       echo search $new_domain_search >> /etc/resolv.conf.dhclient
    8:     elif [ x"$new_domain_name" != x ]; then
    9:       # Note that the DHCP 'Domain Name Option' is really just a domain
   10:       # name, and that this practice of using the domain name option as
   11:       # a search path is both nonstandard and deprecated.
   12:       echo search $new_domain_name >> /etc/resolv.conf.dhclient
   13:     fi
   14:     for nameserver in $new_domain_name_servers; do
   15:       echo nameserver $nameserver >>/etc/resolv.conf.dhclient
   16:     done
   17: 
   18:     mv /etc/resolv.conf.dhclient /etc/resolv.conf
   19:   elif [ "x${new_dhcp6_name_servers}" != x ] ; then
   20:     cat /dev/null > /etc/resolv.conf.dhclient6
   21:     chmod 644 /etc/resolv.conf.dhclient6
   22: 
   23:     if [ "x${new_dhcp6_domain_search}" != x ] ; then
   24:       echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6
   25:     fi
   26:     for nameserver in ${new_dhcp6_name_servers} ; do
   27:       # If the nameserver has a link-local address
   28:       # add a <zone_id> (interface name) to it.
   29:       case $nameserver in
   30: 	fe80:*) zone_id="%$interface";;
   31: 	FE80:*) zone_id="%$interface";;
   32: 	*)      zone_id='';;
   33:       esac
   34:       echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6
   35:     done
   36: 
   37:     mv /etc/resolv.conf.dhclient6 /etc/resolv.conf
   38:   fi
   39: }
   40: 
   41: # Must be used on exit.   Invokes the local dhcp client exit hooks, if any.
   42: exit_with_hooks() {
   43:   exit_status=$1
   44:   if [ -f /etc/dhclient-exit-hooks ]; then
   45:     . /etc/dhclient-exit-hooks
   46:   fi
   47: # probably should do something with exit status of the local script
   48:   exit $exit_status
   49: }
   50: 
   51: # Invoke the local dhcp client enter hooks, if they exist.
   52: if [ -f /etc/dhclient-enter-hooks ]; then
   53:   exit_status=0
   54:   . /etc/dhclient-enter-hooks
   55:   # allow the local script to abort processing of this state
   56:   # local script must set exit_status variable to nonzero.
   57:   if [ $exit_status -ne 0 ]; then
   58:     exit $exit_status
   59:   fi
   60: fi
   61: 
   62: if [ x$new_network_number != x ]; then
   63:    echo New Network Number: $new_network_number
   64: fi
   65: 
   66: if [ x$new_broadcast_address != x ]; then
   67:  echo New Broadcast Address: $new_broadcast_address
   68:   new_broadcast_arg="broadcast $new_broadcast_address"
   69: fi
   70: if [ x$old_broadcast_address != x ]; then
   71:   old_broadcast_arg="broadcast $old_broadcast_address"
   72: fi
   73: if [ x$new_subnet_mask != x ]; then
   74:   new_netmask_arg="netmask $new_subnet_mask"
   75: fi
   76: if [ x$old_subnet_mask != x ]; then
   77:   old_netmask_arg="netmask $old_subnet_mask"
   78: fi
   79: if [ x$alias_subnet_mask != x ]; then
   80:   alias_subnet_arg="netmask $alias_subnet_mask"
   81: fi
   82: 
   83: if [ x$reason = xMEDIUM ]; then
   84:   eval "ifconfig $interface $medium"
   85:   eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1
   86:   sleep 1
   87:   exit_with_hooks 0
   88: fi
   89: 
   90: ###
   91: ### DHCPv4 Handlers
   92: ###
   93: 
   94: if [ x$reason = xPREINIT ]; then
   95:   if [ x$alias_ip_address != x ]; then
   96:     ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
   97:     route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
   98:   fi
   99:   ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
  100: 		broadcast 255.255.255.255 up
  101:   exit_with_hooks 0
  102: fi
  103: 
  104: if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
  105:   exit_with_hooks 0;
  106: fi
  107:   
  108: if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
  109:    [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
  110:   current_hostname=`hostname`
  111:   if [ x$current_hostname = x ] || \
  112:      [ x$current_hostname = x$old_host_name ]; then
  113:     if [ x$current_hostname = x ] || \
  114:        [ x$new_host_name != x$old_host_name ]; then
  115:       hostname $new_host_name
  116:     fi
  117:   fi
  118:     
  119:   if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
  120: 		[ x$alias_ip_address != x$old_ip_address ]; then
  121:     ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
  122:     route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
  123:   fi
  124:   if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]
  125:    then
  126:     eval "ifconfig $interface inet -alias $old_ip_address $medium"
  127:     route delete $old_ip_address 127.1 >/dev/null 2>&1
  128:     for router in $old_routers; do
  129:       route delete default $router >/dev/null 2>&1
  130:     done
  131:     if [ "$old_static_routes" != "" ]; then
  132:       set $old_static_routes
  133:       while [ $# -gt 1 ]; do
  134: 	route delete $1 $2
  135: 	shift; shift
  136:       done
  137:     fi
  138:     arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -n -d \1/p' |sh
  139:   fi
  140:   if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
  141:      [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
  142:     eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
  143: 					$new_broadcast_arg $medium"
  144:     route add $new_ip_address 127.1 >/dev/null 2>&1
  145:     for router in $new_routers; do
  146:       route add default $router >/dev/null 2>&1
  147:     done
  148:     if [ "$new_static_routes" != "" ]; then
  149:       set $new_static_routes
  150:       while [ $# -gt 1 ]; do
  151: 	route add $1 $2
  152: 	shift; shift
  153:       done
  154:     fi
  155:   else                                                                        
  156:     # we haven't changed the address, have we changed other options           
  157:     # that we wish to update?
  158:     if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
  159:       # if we've changed routers delete the old and add the new.
  160:       $LOGGER "New Routers: $new_routers"
  161:       for router in $old_routers; do
  162:         route delete default $router >/dev/null 2>&1
  163:       done
  164:       for router in $new_routers; do
  165:         route add default $router >/dev/null 2>&1
  166:       done
  167:     fi
  168:   fi
  169:   if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
  170:    then
  171:     ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
  172:     route add $alias_ip_address 127.0.0.1
  173:   fi
  174:   make_resolv_conf
  175:   exit_with_hooks 0
  176: fi
  177: 
  178: if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
  179:    || [ x$reason = xSTOP ]; then
  180:   if [ x$alias_ip_address != x ]; then
  181:     ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
  182:     route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
  183:   fi
  184:   if [ x$old_ip_address != x ]; then
  185:     eval "ifconfig $interface inet -alias $old_ip_address $medium"
  186:     route delete $old_ip_address 127.1 >/dev/null 2>&1
  187:     for router in $old_routers; do
  188:       route delete default $router >/dev/null 2>&1
  189:     done
  190:     if [ "$old_static_routes" != "" ]; then
  191:       set $old_static_routes
  192:       while [ $# -gt 1 ]; do
  193: 	route delete $1 $2
  194: 	shift; shift
  195:       done
  196:     fi
  197:     arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -n -d \1/p' \
  198: 						|sh >/dev/null 2>&1
  199:   fi
  200:   if [ x$alias_ip_address != x ]; then
  201:     ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
  202:     route add $alias_ip_address 127.0.0.1
  203:   fi
  204:   exit_with_hooks 0
  205: fi
  206: 
  207: if [ x$reason = xTIMEOUT ]; then
  208:   if [ x$alias_ip_address != x ]; then
  209:     ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
  210:     route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
  211:   fi
  212:   eval "ifconfig $interface inet $new_ip_address $new_netmask_arg \
  213: 					$new_broadcast_arg $medium"
  214:   sleep 1
  215:   if [ "$new_routers" != "" ]; then
  216:     set $new_routers
  217:     if ping -q -c 1 -w 1 $1; then
  218:       if [ x$new_ip_address != x$alias_ip_address ] && \
  219: 			[ x$alias_ip_address != x ]; then
  220: 	ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
  221: 	route add $alias_ip_address 127.0.0.1
  222:       fi
  223:       route add $new_ip_address 127.1 >/dev/null 2>&1
  224:       for router in $new_routers; do
  225: 	route add default $router >/dev/null 2>&1
  226:       done
  227:       set $new_static_routes
  228:       while [ $# -gt 1 ]; do
  229: 	route add $0 $1
  230: 	shift; shift
  231:       done
  232:       make_resolv_conf
  233:       exit_with_hooks 0
  234:     fi
  235:   fi
  236:   eval "ifconfig $interface inet -alias $new_ip_address $medium"
  237:   for router in $old_routers; do
  238:     route delete default $router >/dev/null 2>&1
  239:   done
  240:   if [ "$old_static_routes" != "" ]; then
  241:     set $old_static_routes
  242:     while [ $# -gt 1 ]; do
  243:       route delete $1 $2
  244:       shift; shift
  245:     done
  246:   fi
  247:   arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -n -d \1/p' \
  248: 							|sh >/dev/null 2>&1
  249:   exit_with_hooks 1
  250: fi
  251: 
  252: ###
  253: ### DHCPv6 Handlers
  254: ###
  255: 
  256: if [ ${reason} = PREINIT6 ] ; then
  257:   # Ensure interface is up.
  258:   ifconfig ${interface} up
  259: 
  260:   # XXX: Remove any stale addresses from aborted clients.
  261: 
  262:   exit_with_hooks 0
  263: fi
  264: 
  265: if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ] ; then
  266:     echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
  267: 
  268:     exit_with_hooks 0
  269: fi
  270: 
  271: if [ ${reason} = BOUND6 ] ; then
  272:   if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
  273:     exit_with_hooks 2;
  274:   fi
  275: 
  276:   ifconfig ${interface} inet6 add ${new_ip6_address}/${new_ip6_prefixlen}
  277: 
  278:   # Check for nameserver options.
  279:   make_resolv_conf
  280: 
  281:   exit_with_hooks 0
  282: fi
  283: 
  284: if [ ${reason} = RENEW6 ] || [ ${reason} = REBIND6 ] ; then
  285:   # Make sure nothing has moved around on us.
  286: 
  287:   # Nameservers/domains/etc.
  288:   if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] ||
  289:      [ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ] ; then
  290:     make_resolv_conf
  291:   fi
  292: 
  293:   exit_with_hooks 0
  294: fi
  295: 
  296: if [ ${reason} = DEPREF6 ] ; then
  297:   if [ x${new_ip6_prefixlen} = x ] ; then
  298:     exit_with_hooks 2;
  299:   fi
  300: 
  301:   # XXX:
  302:   # There doesn't appear to be a way to update an addr to indicate
  303:   # preference.
  304: 
  305:   exit_with_hooks 0
  306: fi
  307: 
  308: if [ ${reason} = EXPIRE6 -o ${reason} = RELEASE6 -o ${reason} = STOP6 ] ; then
  309:   if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ] ; then
  310:     exit_with_hooks 2;
  311:   fi
  312: 
  313:   ifconfig ${interface} inet6 delete ${old_ip6_address}/${old_ip6_prefixlen}
  314: 
  315:   exit_with_hooks 0
  316: fi
  317: 
  318: exit_with_hooks 0