Initial commit

dhcp/debug

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+#
+# The purpose of this script is just to show the variables that are
+# available to all the scripts in this directory. All these scripts are
+# called from dhclient-script, which exports all the variables shown
+# before. If you want to debug a problem with your DHCP setup you can
+# enable this script and take a look at /tmp/dhclient-script.debug.
+
+# To enable this script set the following variable to "yes"
+RUN="no"
+
+if [ "$RUN" = "yes" ]; then
+	echo "$(date): entering ${1%/*}, dumping variables." \
+		>> /tmp/dhclient-script.debug
+
+	# loop over the 4 possible prefixes: (empty), cur_, new_, old_
+	for prefix in '' 'cur_' 'new_' 'old_'; do
+		# loop over the DHCP variables passed to dhclient-script
+		for basevar in reason interface medium alias_ip_address \
+			       ip_address host_name network_number subnet_mask \
+			       broadcast_address routers static_routes \
+			       rfc3442_classless_static_routes \
+			       domain_name domain_search domain_name_servers \
+			       netbios_name_servers netbios_scope \
+			       ntp_servers \
+			       ip6_address ip6_prefix ip6_prefixlen \
+			       dhcp6_domain_search dhcp6_name_servers ; do
+			var="${prefix}${basevar}"
+			eval "content=\$$var"
+
+			# show only variables with values set
+			if [ -n "${content}" ]; then
+				echo "$var='${content}'" >> /tmp/dhclient-script.debug
+			fi
+		done
+	done
+
+	echo '--------------------------' >> /tmp/dhclient-script.debug
+fi

dhcp/dhclient-enter-hooks.d/debug

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+../debug

dhcp/dhclient-enter-hooks.d/resolvconf

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+# resolvconf support for dhclient3
+
+NL="
+"
+
+if [ -x /sbin/resolvconf ]; then
+	case "$reason" in
+	BOUND|RENEW|REBIND|REBOOT|TIMEOUT)	
+		make_resolv_conf() {
+			local nameserver conf=
+			if [ -n "$new_domain_name" ]; then
+				conf="${conf}domain $new_domain_name$NL"
+			fi
+			if [ -n "$new_domain_search" ]; then
+				conf="${conf}search $new_domain_search$NL"
+			fi
+			for nameserver in $new_domain_name_servers; do
+				conf="${conf}nameserver $nameserver$NL"
+			done
+			if [ -n "$conf" -a -n "$interface" ]; then
+				conf="# resolv.conf for $interface$NL$conf"
+				printf %s "$conf" | \
+					/sbin/resolvconf -a "$interface"
+			fi
+		}
+		;;
+	BOUND6|RENEW6|REBIND6)
+		make_resolv_conf() {
+			local nameserver conf=
+			if [ -n "$new_dhcp6_domain_search" ]; then
+				conf="${conf}search $new_dhcp6_domain_search$NL"
+			fi
+			for nameserver in $new_dhcp6_name_servers; do
+				conf="${conf}nameserver $nameserver$NL"
+			done
+			if [ -n "$conf" -a -n "$interface" ]; then
+				conf="# resolv.conf for $interface$NL$conf"
+				printf %s "$conf" | \
+					/sbin/resolvconf -a "$interface.inet6"
+			fi
+		}
+		;;
+	EXPIRE|FAIL|RELEASE|STOP)
+		[ -z "$interface" ] || /sbin/resolvconf -f -d "$interface"
+		;;
+	EXPIRE6|RELEASE6|STOP6)
+		[ -z "$interface" ] || /sbin/resolvconf -f -d "$interface.inet6"
+		;;
+	esac
+fi

dhcp/dhclient-exit-hooks.d/debug

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+../debug

dhcp/dhclient-exit-hooks.d/rfc3442-classless-routes

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+# set classless routes based on the format specified in RFC3442
+# e.g.:
+#   new_rfc3442_classless_static_routes='24 192 168 10 192 168 1 1 8 10 10 17 66 41'
+# specifies the routes:
+#   192.168.10.0/24 via 192.168.1.1
+#   10.0.0.0/8 via 10.10.17.66.41
+
+RUN="yes"
+
+
+if [ "$RUN" = "yes" ]; then
+	if [ -n "$new_rfc3442_classless_static_routes" ]; then
+		if [ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
+
+			set -- $new_rfc3442_classless_static_routes
+
+			while [ $# -gt 0 ]; do
+				net_length=$1
+				via_arg=''
+
+				case $net_length in
+					32|31|30|29|28|27|26|25)
+						if [ $# -lt 9 ]; then
+							return 1
+						fi
+						net_address="${2}.${3}.${4}.${5}"
+						gateway="${6}.${7}.${8}.${9}"
+						shift 9
+						;;
+					24|23|22|21|20|19|18|17)
+						if [ $# -lt 8 ]; then
+							return 1
+						fi
+						net_address="${2}.${3}.${4}.0"
+						gateway="${5}.${6}.${7}.${8}"
+						shift 8
+						;;
+					16|15|14|13|12|11|10|9)
+						if [ $# -lt 7 ]; then
+							return 1
+						fi
+						net_address="${2}.${3}.0.0"
+						gateway="${4}.${5}.${6}.${7}"
+						shift 7
+						;;
+					8|7|6|5|4|3|2|1)
+						if [ $# -lt 6 ]; then
+							return 1
+						fi
+						net_address="${2}.0.0.0"
+						gateway="${3}.${4}.${5}.${6}"
+						shift 6
+						;;
+					0)	# default route
+						if [ $# -lt 5 ]; then
+							return 1
+						fi
+						net_address="0.0.0.0"
+						gateway="${2}.${3}.${4}.${5}"
+						shift 5
+						;;
+					*)	# error
+						return 1
+						;;
+				esac
+
+				# take care of link-local routes
+				if [ "${gateway}" != '0.0.0.0' ]; then
+					via_arg="via ${gateway}"
+				fi
+
+				# set route (ip detects host routes automatically)
+				ip -4 route add "${net_address}/${net_length}" \
+					${via_arg} dev "${interface}" >/dev/null 2>&1
+			done
+		fi
+	fi
+fi

dhcp/dhclient-exit-hooks.d/timesyncd

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+TIMESYNCD_CONF=/run/systemd/timesyncd.conf.d/01-dhclient.conf
+
+timesyncd_servers_setup_remove() {
+        if [ -e $TIMESYNCD_CONF ]; then
+            rm -f $TIMESYNCD_CONF
+            systemctl try-restart systemd-timesyncd.service || true
+        fi
+}
+
+timesyncd_servers_setup_add() {
+        if [ ! -d /run/systemd/system ]; then
+                return
+        fi
+
+        if [ -e $TIMESYNCD_CONF ] && [ "$new_ntp_servers" = "$old_ntp_servers" ]; then
+                return
+        fi
+
+        if [ -z "$new_ntp_servers" ]; then
+                timesyncd_servers_setup_remove
+                return
+        fi
+
+        mkdir -p $(dirname $TIMESYNCD_CONF)
+        cat <<EOF > ${TIMESYNCD_CONF}.new
+# NTP server entries received from DHCP server
+[Time]
+NTP=$new_ntp_servers
+EOF
+        mv ${TIMESYNCD_CONF}.new ${TIMESYNCD_CONF}
+        systemctl try-restart systemd-timesyncd.service || true
+}
+
+
+case $reason in
+        BOUND|RENEW|REBIND|REBOOT)
+                timesyncd_servers_setup_add
+                ;;
+        EXPIRE|FAIL|RELEASE|STOP)
+                timesyncd_servers_setup_remove
+                ;;
+esac

dhcp/dhclient.conf

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+# Configuration file for /sbin/dhclient.
+#
+# This is a sample configuration file for dhclient. See dhclient.conf's
+#	man page for more information about the syntax of this file
+#	and a more comprehensive list of the parameters understood by
+#	dhclient.
+#
+# Normally, if the DHCP server provides reasonable information and does
+#	not leave anything out (like the domain name, for example), then
+#	few changes must be made to this file, if any.
+#
+
+option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
+
+send host-name = gethostname();
+request subnet-mask, broadcast-address, time-offset, routers,
+	domain-name, domain-name-servers, domain-search, host-name,
+	dhcp6.name-servers, dhcp6.domain-search, dhcp6.fqdn, dhcp6.sntp-servers,
+	netbios-name-servers, netbios-scope, interface-mtu,
+	rfc3442-classless-static-routes, ntp-servers;
+
+#send dhcp-client-identifier 1:0:a0:24:ab:fb:9c;
+#send dhcp-lease-time 3600;
+#supersede domain-name "fugue.com home.vix.com";
+#prepend domain-name-servers 127.0.0.1;
+#require subnet-mask, domain-name-servers;
+#timeout 60;
+#retry 60;
+#reboot 10;
+#select-timeout 5;
+#initial-interval 2;
+#script "/sbin/dhclient-script";
+#media "-link0 -link1 -link2", "link0 link1";
+#reject 192.33.137.209;
+
+#alias {
+#  interface "eth0";
+#  fixed-address 192.5.5.213;
+#  option subnet-mask 255.255.255.255;
+#}
+
+#lease {
+#  interface "eth0";
+#  fixed-address 192.33.137.200;
+#  medium "link0 link1";
+#  option host-name "andare.swiftmedia.com";
+#  option subnet-mask 255.255.255.0;
+#  option broadcast-address 192.33.137.255;
+#  option routers 192.33.137.250;
+#  option domain-name-servers 127.0.0.1;
+#  renew 2 2000/1/12 00:00:01;
+#  rebind 2 2000/1/12 00:00:01;
+#  expire 2 2000/1/12 00:00:01;
+#}