1 #!/bin/sh 2 # 3 # Id: macos,v 1.4 2011/09/20 16:59:54 sar Exp 4 # 5 # automous run of this script will commit the DNS setting 6 # 7 8 if [ -x /usr/bin/logger ]; then 9 LOGGER="/usr/bin/logger -s -p user.notice -t dhclient" 10 else 11 LOGGER=echo 12 fi 13 14 to_commit="yes" 15 16 make_resolv_conf() { 17 to_commit="no" 18 if [ "x${new_dhcp6_name_servers}" != x ]; then 19 ( cat /dev/null > /var/run/resolv.conf.dhclient6 ) 20 exit_status=$? 21 if [ $exit_status -ne 0 ]; then 22 $LOGGER "Unable to create /var/run/resolv.conf.dhclient6: Error $exit_status" 23 else 24 if [ "x${new_dhcp6_domain_search}" != x ]; then 25 ( echo search ${new_dhcp6_domain_search} >> /var/run/resolv.conf.dhclient6 ) 26 exit_status=$? 27 fi 28 for nameserver in ${new_dhcp6_name_servers} ; do 29 if [ $exit_status -ne 0 ]; then 30 break 31 fi 32 # If the nameserver has a link-local address 33 # add a <zone_id> (interface name) to it. 34 case $nameserver in 35 fe80:*) zone_id="%$interface";; 36 FE80:*) zone_id="%$interface";; 37 *) zone_id="";; 38 esac 39 ( echo nameserver ${nameserver}$zone_id >> /etc/resolv.conf.dhclient6 ) 40 exit_status=$? 41 done 42 43 if [ $exit_status -eq 0 ]; then 44 to_commit="force" 45 commit_resolv_conf 46 fi 47 fi 48 fi 49 } 50 51 # Try to commit /var/run/resolv.conf.dhclient6 contents to 52 # System Configuration framework's Dynamic Store. 53 # Note this will be cleared by the next location change 54 # or preempted by IPv4. 55 # 56 # The System Configuration agent "IPMonitor" gets the DNS configuration 57 # from the IPv4 or IPv6 primary service in the Dynamic Store 58 # (managed by configd). 59 commit_resolv_conf() { 60 if [ -f /var/run/resolv.conf.dhclient6 ]; then 61 if [ -x /usr/sbin/scutil ]; then 62 serviceID=`echo show State:/Network/Global/IPv6 | \ 63 /usr/sbin/scutil | \ 64 awk '/PrimaryService/ { print $3 }'` 65 echo $serviceID 66 if [ x$serviceID = x ]; then 67 $LOGGER "Can't find the primary IPv6 service" 68 else 69 tmp=`mktemp SC_dhclient6.XXXXXXXXXX` 70 echo list | /usr/sbin/scutil > /tmp/$tmp 71 grep -q State:/Network/Service/$serviceID/DNS /tmp/$tmp 72 grep_status=$? 73 if [ $grep_status -eq 0 ]; then 74 $LOGGER "DNS service already set in primary IPv6 service" 75 rm /tmp/$tmp 76 else 77 res=/var/run/resolv.conf.dhclient6 78 cp /dev/null /tmp/$tmp 79 grep -q '^nameserver' $res 80 grep_status=$? 81 if [ $grep_status -eq 0 ]; then 82 echo d.add ServerAddresses '*' \ 83 `awk 'BEGIN { n="" } \ 84 /^nameserver/ { n=n " " $2 } \ 85 END { print n}' < $res` >> /tmp/$tmp 86 fi 87 grep -q '^search' $res 88 grep_status=$? 89 if [ $grep_status -eq 0 ]; then 90 echo d.add SearchDomains '*' \ 91 `sed 's/^search//' < $res` >> /tmp/$tmp 92 fi 93 echo set State:/Network/Service/$serviceID/DNS >> /tmp/$tmp 94 echo quit >> /tmp/$tmp 95 cat /tmp/$tmp 96 /usr/sbin/scutil < /tmp/$tmp 97 rm /tmp/$tmp 98 fi 99 fi 100 else 101 $LOGGER "Can't find SystemConfiguration tools." 102 fi 103 else 104 if [ $to_commit = force ]; then 105 $LOGGER "Can't find /var/run/resolv.conf.dhclient6" 106 fi 107 fi 108 to_commit="done" 109 } 110 111 # This function was largely borrowed from dhclient-script that 112 # ships with Centos, authored by Jiri Popelka and David Cantrell 113 # of Redhat. Thanks guys. 114 add_ipv6_addr_with_DAD() { 115 ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias 116 117 if [ ${dad_wait_time} -le 0 ] 118 then 119 # if we're not waiting for DAD, assume we're good 120 return 0 121 fi 122 123 # Repeatedly test whether newly added address passed 124 # duplicate address detection (DAD) 125 for i in $(seq 1 ${dad_wait_time}); do 126 sleep 1 # give the DAD some time 127 128 addr=$(ifconfig ${interface} \ 129 | grep "${new_ip6_address} prefixlen ${new_ip6_prefixlen}") 130 131 # tentative flag == DAD is still not complete 132 tentative=$(echo "${addr}" | grep tentative) 133 # dadfailed flag == address is already in use somewhere else 134 dadfailed=$(echo "${addr}" | grep duplicated) 135 136 if [ -n "${dadfailed}" ] ; then 137 # dad failed, remove the address 138 ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} -alias 139 exit_with_hooks 3 140 fi 141 142 if [ -z "${tentative}" ] ; then 143 if [ -n "${addr}" ]; then 144 # DAD is over 145 return 0 146 else 147 # address was auto-removed (or not added at all) 148 exit_with_hooks 3 149 fi 150 fi 151 done 152 153 return 0 154 } 155 156 # Must be used on exit. Invokes the local dhcp client exit hooks, if any. 157 exit_with_hooks() { 158 exit_status=$1 159 if [ -f /etc/dhclient-exit-hooks ]; then 160 . /etc/dhclient-exit-hooks 161 fi 162 # probably should do something with exit status of the local script 163 exit $exit_status 164 } 165 166 # Invoke the local dhcp client enter hooks, if they exist. 167 if [ -f /etc/dhclient-enter-hooks ]; then 168 exit_status=0 169 . /etc/dhclient-enter-hooks 170 # allow the local script to abort processing of this state 171 # local script must set exit_status variable to nonzero. 172 if [ $exit_status -ne 0 ]; then 173 exit $exit_status 174 fi 175 fi 176 177 if [ x$reason = xMEDIUM ]; then 178 eval "ifconfig $interface $medium" 179 eval "ifconfig $interface inet -alias 0.0.0.0 $medium" >/dev/null 2>&1 180 sleep 1 181 exit_with_hooks 0 182 fi 183 184 ### 185 ### DHCPv6 Handlers 186 ### 187 188 if [ x$reason = xPREINIT6 ]; then 189 # Ensure interface is up. 190 ifconfig ${interface} up 191 192 # We need to give the kernel some time to active interface 193 interface_up_wait_time=5 194 for i in $(seq 0 ${interface_up_wait_time}) 195 do 196 ifconfig ${interface} | grep inactive &> /dev/null 197 if [ $? -ne 0 ]; then 198 break; 199 fi 200 sleep 1 201 done 202 203 # XXX: Remove any stale addresses from aborted clients. 204 205 # Wait for duplicate address detection for this interface if the 206 # --dad-wait-time parameter has been specified and is greater than 207 # zero. 208 if [ ${dad_wait_time} -gt 0 ]; then 209 # Check if any IPv6 address on this interface is marked as 210 # tentative. 211 ifconfig ${interface} | grep inet6 | grep tentative \ 212 &> /dev/null 213 if [ $? -eq 0 ]; then 214 # Wait for duplicate address detection to complete or for 215 # the timeout specified as --dad-wait-time. 216 for i in $(seq 0 $dad_wait_time) 217 do 218 # We're going to poll for the tentative flag every second. 219 sleep 1 220 ifconfig ${interface} | grep inet6 | grep tentative \ 221 &> /dev/null 222 if [ $? -ne 0 ]; then 223 break; 224 fi 225 done 226 fi 227 fi 228 229 exit_with_hooks 0 230 fi 231 232 if [ x${old_ip6_prefix} != x ] || [ x${new_ip6_prefix} != x ]; then 233 echo Prefix $reason old=${old_ip6_prefix} new=${new_ip6_prefix} 234 235 exit_with_hooks 0 236 fi 237 238 if [ x$reason = xBOUND6 ]; then 239 if [ x${new_ip6_address} = x ] || [ x${new_ip6_prefixlen} = x ]; then 240 exit_with_hooks 2; 241 fi 242 243 # Add address to interface, check for DAD if dad_wait_time > 0 244 add_ipv6_addr_with_DAD 245 246 # Check for nameserver options. 247 make_resolv_conf 248 249 exit_with_hooks 0 250 fi 251 252 if [ x$reason = xRENEW6 ] || [ x$reason = xREBIND6 ]; then 253 # Make sure nothing has moved around on us. 254 255 # Nameservers/domains/etc. 256 if [ "x${new_dhcp6_name_servers}" != "x${old_dhcp6_name_servers}" ] || 257 [ "x${new_dhcp6_domain_search}" != "x${old_dhcp6_domain_search}" ]; then 258 make_resolv_conf 259 fi 260 261 exit_with_hooks 0 262 fi 263 264 if [ x$reason = xDEPREF6 ]; then 265 if [ x${new_ip6_address} = x ]; then 266 exit_with_hooks 2; 267 fi 268 269 ifconfig ${interface} inet6 ${new_ip6_address} deprecated 270 271 exit_with_hooks 0 272 fi 273 274 if [ x$reason = xEXPIRE6 -o x$reason = xRELEASE6 -o x$reason = xSTOP6 ]; then 275 if [ x${old_ip6_address} = x ] || [ x${old_ip6_prefixlen} = x ]; then 276 exit_with_hooks 2; 277 fi 278 279 ifconfig ${interface} inet6 ${old_ip6_address}/${old_ip6_prefixlen} -alias 280 281 exit_with_hooks 0 282 fi 283 284 if [ $to_commit = yes ]; then 285 commit_resolv_conf 286 fi 287 288 exit_with_hooks 0 289
Indexes created Tue Apr 14 00:22:26 UTC 2026