Annotation of embedaddon/dhcp/client/scripts/openwrt, revision 1.1
1.1 ! misho 1: #!/bin/sh
! 2:
! 3: make_resolv_conf() {
! 4: if [ x"$new_domain_name_servers" != x ]; then
! 5: cat /dev/null > /etc/resolv.conf.dhclient
! 6: chmod 644 /etc/resolv.conf.dhclient
! 7: if [ x"$new_domain_search" != x ]; then
! 8: echo search $new_domain_search >> /etc/resolv.conf.dhclient
! 9: elif [ x"$new_domain_name" != x ]; then
! 10: # Note that the DHCP 'Domain Name Option' is really just a domain
! 11: # name, and that this practice of using the domain name option as
! 12: # a search path is both nonstandard and deprecated.
! 13: echo search $new_domain_name >> /etc/resolv.conf.dhclient
! 14: fi
! 15: for nameserver in $new_domain_name_servers; do
! 16: echo nameserver $nameserver >>/etc/resolv.conf.dhclient
! 17: done
! 18:
! 19: mv /etc/resolv.conf.dhclient /etc/resolv.conf
! 20: elif [ "x${new_dhcp6_name_servers}" != x ] ; then
! 21: cat /dev/null > /etc/resolv.conf.dhclient6
! 22: chmod 644 /etc/resolv.conf.dhclient6
! 23:
! 24: if [ "x${new_dhcp6_domain_search}" != x ] ; then
! 25: echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6
! 26: fi
! 27: for nameserver in ${new_dhcp6_name_servers} ; do
! 28: # If the nameserver has a link-local address
! 29: # add a <zone_id> (interface name) to it.
! 30: case $nameserver in
! 31: fe80:*) zone_id="%$interface";;
! 32: FE80:*) zone_id="%$interface";;
! 33: *) zone_id='';;
! 34: esac
! 35: echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6
! 36: done
! 37:
! 38: mv /etc/resolv.conf.dhclient6 /etc/resolv.conf
! 39: fi
! 40: }
! 41:
! 42: # Must be used on exit. Invokes the local dhcp client exit hooks, if any.
! 43: exit_with_hooks() {
! 44: exit_status=$1
! 45: if [ -f /etc/dhclient-exit-hooks ]; then
! 46: . /etc/dhclient-exit-hooks
! 47: fi
! 48: # probably should do something with exit status of the local script
! 49: exit $exit_status
! 50: }
! 51:
! 52: # Invoke the local dhcp client enter hooks, if they exist.
! 53: if [ -f /etc/dhclient-enter-hooks ]; then
! 54: exit_status=0
! 55: . /etc/dhclient-enter-hooks
! 56: # allow the local script to abort processing of this state
! 57: # local script must set exit_status variable to nonzero.
! 58: if [ $exit_status -ne 0 ]; then
! 59: exit $exit_status
! 60: fi
! 61: fi
! 62:
! 63: ###
! 64: ### DHCPv4 Handlers
! 65: ###
! 66:
! 67: if [ x$new_broadcast_address != x ]; then
! 68: new_broadcast_arg="broadcast $new_broadcast_address"
! 69: fi
! 70: if [ x$new_subnet_mask != x ]; then
! 71: new_subnet_arg="netmask $new_subnet_mask"
! 72: fi
! 73: if [ x$alias_subnet_mask != x ]; then
! 74: alias_subnet_arg="netmask $alias_subnet_mask"
! 75: fi
! 76: if [ x$new_interface_mtu != x ]; then
! 77: mtu_arg="mtu $new_interface_mtu"
! 78: fi
! 79: if [ x$IF_METRIC != x ]; then
! 80: metric_arg="metric $IF_METRIC"
! 81: fi
! 82:
! 83: if [ x$reason = xMEDIUM ]; then
! 84: # Linux doesn't do mediums (ok, ok, media).
! 85: exit_with_hooks 0
! 86: fi
! 87:
! 88: if [ x$reason = xPREINIT ]; then
! 89: if [ x$alias_ip_address != x ]; then
! 90: # Bring down alias interface. Its routes will disappear too.
! 91: ifconfig $interface:0- 0.0.0.0
! 92: fi
! 93: ifconfig $interface 0.0.0.0 up
! 94:
! 95: # We need to give the kernel some time to get the interface up.
! 96: sleep 1
! 97:
! 98: exit_with_hooks 0
! 99: fi
! 100:
! 101: if [ x$reason = xARPCHECK ] || [ x$reason = xARPSEND ]; then
! 102: exit_with_hooks 0
! 103: fi
! 104:
! 105: if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
! 106: [ x$reason = xREBIND ] || [ x$reason = xREBOOT ]; then
! 107: current_hostname=`hostname`
! 108: if [ x$current_hostname = x ] || \
! 109: [ x$current_hostname = x$old_host_name ]; then
! 110: if [ x$current_hostname = x ] || \
! 111: [ x$new_host_name != x$old_host_name ]; then
! 112: hostname $new_host_name
! 113: fi
! 114: fi
! 115:
! 116: if [ x$old_ip_address != x ] && [ x$alias_ip_address != x ] && \
! 117: [ x$alias_ip_address != x$old_ip_address ]; then
! 118: # Possible new alias. Remove old alias.
! 119: ifconfig $interface:0- 0.0.0.0
! 120: fi
! 121: if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
! 122: # IP address changed. Bringing down the interface will delete all routes,
! 123: # and clear the ARP cache.
! 124: ifconfig $interface 0.0.0.0 down
! 125:
! 126: fi
! 127: if [ x$old_ip_address = x ] || [ x$old_ip_address != x$new_ip_address ] || \
! 128: [ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
! 129:
! 130: ifconfig $interface $new_ip_address $new_subnet_arg \
! 131: $new_broadcast_arg $mtu_arg $metric_arg
! 132: for router in $new_routers; do
! 133: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
! 134: route add -host $router dev $interface
! 135: fi
! 136: route add default gw $router
! 137: done
! 138: else
! 139: # we haven't changed the address, have we changed other options
! 140: # that we wish to update?
! 141: if [ x$new_routers != x ] && [ x$new_routers != x$old_routers ] ; then
! 142: # if we've changed routers delete the old and add the new.
! 143: $LOGGER "New Routers: $new_routers"
! 144: for router in $old_routers; do
! 145: route delete default $router
! 146: done
! 147: for router in $new_routers; do
! 148: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
! 149: route add -host $router dev $interface
! 150: fi
! 151: route add default gw $router
! 152: done
! 153: fi
! 154: fi
! 155: if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
! 156: then
! 157: ifconfig $interface:0- 0.0.0.0
! 158: ifconfig $interface:0 $alias_ip_address $alias_subnet_arg
! 159: route add -host $alias_ip_address $interface:0
! 160: fi
! 161: make_resolv_conf
! 162: exit_with_hooks 0
! 163: fi
! 164:
! 165: if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ] || [ x$reason = xRELEASE ] \
! 166: || [ x$reason = xSTOP ]; then
! 167: if [ x$alias_ip_address != x ]; then
! 168: # Turn off alias interface.
! 169: ifconfig $interface:0- 0.0.0.0
! 170: fi
! 171: if [ x$old_ip_address != x ]; then
! 172: # Shut down interface, which will delete routes and clear arp cache.
! 173: ifconfig $interface 0.0.0.0 down
! 174: fi
! 175: if [ x$alias_ip_address != x ]; then
! 176: ifconfig $interface:0 $alias_ip_address $alias_subnet_arg
! 177: route add -host $alias_ip_address $interface:0
! 178: fi
! 179: exit_with_hooks 0
! 180: fi
! 181:
! 182: if [ x$reason = xTIMEOUT ]; then
! 183: if [ x$alias_ip_address != x ]; then
! 184: ifconfig $interface:0- 0.0.0.0
! 185: fi
! 186: ifconfig $interface $new_ip_address $new_subnet_arg \
! 187: $new_broadcast_arg $mtu_arg $metric_arg
! 188: set $new_routers
! 189: if ping -q -c 1 $1; then
! 190: if [ x$new_ip_address != x$alias_ip_address ] && \
! 191: [ x$alias_ip_address != x ]; then
! 192: ifconfig $interface:0 $alias_ip_address $alias_subnet_arg
! 193: route add -host $alias_ip_address dev $interface:0
! 194: fi
! 195: for router in $new_routers; do
! 196: if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
! 197: route add -host $router dev $interface
! 198: fi
! 199: route add default gw $router
! 200: done
! 201: make_resolv_conf
! 202: exit_with_hooks 0
! 203: fi
! 204: ifconfig $interface 0.0.0.0 down
! 205: exit_with_hooks 1
! 206: fi
! 207:
! 208: ###
! 209: ### DHCPv6 Handlers
! 210: ###
! 211:
! 212: if [ x$reason = xPREINIT6 ]; then
! 213: # Ensure interface is up.
! 214: ifconfig ${interface} up
! 215:
! 216: # Remove any stale addresses from aborted clients.
! 217: ip -f inet6 addr flush dev ${interface} scope global
! 218:
! 219: exit_with_hooks 0
! 220: fi
! 221:
! 222: if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ] ; then
! 223: echo Prefix ${reason} old=${old_ip6_prefix} new=${new_ip6_prefix}
! 224:
! 225: exit_with_hooks 0
! 226: fi
! 227:
! 228: if [ x$reason = xBOUND6 ]; then
! 229: if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
! 230: exit_with_hooks 2;
! 231: fi
! 232:
! 233: ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias
! 234:
! 235: # Check for nameserver options.
! 236: make_resolv_conf
! 237:
! 238: exit_with_hooks 0
! 239: fi
! 240:
! 241: if [ x$reason = xRENEW6 ] || [ x$reason = xREBIND6 ]; then
! 242: if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ] ; then
! 243: exit_with_hooks 2;
! 244: fi
! 245:
! 246: ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias
! 247:
! 248: # Make sure nothing has moved around on us.
! 249:
! 250: # Nameservers/domains/etc.
! 251: if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] ||
! 252: [ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ] ; then
! 253: make_resolv_conf
! 254: fi
! 255:
! 256: exit_with_hooks 0
! 257: fi
! 258:
! 259: if [ x$reason = xDEPREF6 ]; then
! 260: if [ x${new_ip6_address} = x ] ; then
! 261: exit_with_hooks 2;
! 262: fi
! 263:
! 264: ifconfig ${interface} inet6 ${new_ip6_address} deprecated
! 265:
! 266: exit_with_hooks 0
! 267: fi
! 268:
! 269: if [ x$reason = xEXPIRE6 -o x$reason = xRELEASE6 -o x$reason = xSTOP6 ]; then
! 270: if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ] ; then
! 271: exit_with_hooks 2;
! 272: fi
! 273:
! 274: ifconfig ${interface} inet6 ${old_ip6_address}/${old_ip6_prefixlen} -alias
! 275:
! 276: exit_with_hooks 0
! 277: fi
! 278:
! 279: exit_with_hooks 0
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