isc-dhcp: support dynamic dns for 10/8 and 172.16/12

Signed-off-by: Philip Prindeville <redacted>

diff --git a/net/isc-dhcp/Makefile b/net/isc-dhcp/Makefile
index 68c60e58a5f4274e3ede2fabbeb9bf4f1aacbbc3..e01b10eb998777f786547b9c8b1ff1e43df2193f 100644 (file)
--- a/net/isc-dhcp/Makefile
+++ b/net/isc-dhcp/Makefile
@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=isc-dhcp
 UPSTREAM_NAME:=dhcp
 PKG_VERSION:=4.4.1
-PKG_RELEASE:=12
+PKG_RELEASE:=13
 
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE

diff --git a/net/isc-dhcp/files/dhcpd.init b/net/isc-dhcp/files/dhcpd.init
index 2c8d21b25eec2f8b575637fb5689a5e5c08d0ad0..1436e7e2aaa5cc292462184e2ce0aa6ad2e81306 100755 (executable)
--- a/net/isc-dhcp/files/dhcpd.init
+++ b/net/isc-dhcp/files/dhcpd.init
@@ -78,12 +78,6 @@ typeof() {
 '
 }
 
-rev_quad() {
-       local ip="$1"
-
-       echo "$ip" | awk -F '.' '{ printf "%s.%s.%s.%s\n", $4, $3, $2, $1; }'
-}
-
 update() {
        local lhs="$1" family="$2" type="$3"
        shift 3
@@ -97,8 +91,18 @@ explode() {
        echo "$arg" | sed -e 's/\./, /g'
 }
 
-create_empty_zone()
-{
+rev_str() {
+       local str="$1" delim="$2"
+       local frag result="" IFS="$delim"
+
+       for frag in $str; do
+               result="$frag${result:+$delim}$result"
+       done
+
+       echo "$result"
+}
+
+create_empty_zone() {
        local zone="$1"
 
        if [ ! -f $dyndir/db."$zone" ]; then
@@ -182,7 +186,7 @@ static_domain_add() {
        config_get ip "$cfg" "ip"
        [ -n "$ip" ] || return 0
 
-       revip="$(rev_quad "$ip")"
+       revip="$(rev_str "$ip" ".")"
 
        update "$name.$domain." IN A "$ip"
        update "$revip.in-addr.arpa." IN PTR "$name.$domain."
@@ -329,7 +333,7 @@ gen_dhcp_subnet() {
 }
 
 dhcpd_add() {
-       local cfg="$1"
+       local cfg="$1" synthesize="$2"
        local dhcp6range="::"
        local dynamicdhcp end gateway ifname ignore leasetime limit net netmask
        local proto networkid start subnet
@@ -353,6 +357,17 @@ dhcpd_add() {
 
        [ static = "$proto" ] || return 0
 
+       local pair="$(echo "${subnet%%/*}" | cut -d. -f1-2)"
+       case "$pair" in
+       10.*)
+               rfc1918_nets="$rfc1918_nets${rfc1918_nets:+ }10"
+               ;;
+       172.1[6789]|172.2[0-9]|172.3[01]|192.168)
+               rfc1918_nets="$rfc1918_nets${rfc1918_nets:+ }$pair"
+               ;;
+       esac
+       [ $synthesize -eq 0 ] && return
+
        config_get_bool dynamicdhcp "$cfg" "dynamicdhcp" 1
 
        dhcp_ifs="$dhcp_ifs $ifname"
@@ -384,6 +399,7 @@ dhcpd_add() {
 general_config() {
        local always_broadcast boot_unknown_clients log_facility
        local default_lease_time max_lease_time
+
        config_get_bool always_broadcast "isc_dhcpd" "always_broadcast" 0
        config_get_bool authoritative "isc_dhcpd" "authoritative" 1
        config_get_bool boot_unknown_clients "isc_dhcpd" "boot_unknown_clients" 1
@@ -406,7 +422,12 @@ general_config() {
        if [ $dynamicdns -eq 1 ]; then
                create_empty_zone "$domain"
 
-               create_empty_zone "168.192.in-addr.arpa"
+               local mynet
+
+               for mynet in $rfc1918_nets; do
+                       mynet="$(rev_str "$mynet" ".")"
+                       create_empty_zone "$mynet.in-addr.arpa"
+               done
 
                cat <<EOF > $conf_local_file
 zone "$domain" {
@@ -416,14 +437,21 @@ zone "$domain" {
   allow-transfer { key $session_key_name; };
 };
 
-zone "168.192.in-addr.arpa" {
+EOF
+
+               for mynet in $rfc1918_nets; do
+                       mynet="$(rev_str "$mynet" ".")"
+                       cat <<EOF >> $conf_local_file
+zone "$mynet.in-addr.arpa" {
   type master;
-  file "$dyndir/db.168.192.in-addr.arpa";
+  file "$dyndir/db.$mynet.in-addr.arpa";
   allow-update { key $session_key_name; };
   allow-transfer { key $session_key_name; };
 };
 
 EOF
+               done
+
                /etc/init.d/named reload
                sleep 1
 
@@ -445,12 +473,18 @@ zone $domain. {
        key local-ddns;
 }
 
-zone 168.192.in-addr.arpa. {
+EOF
+
+               for mynet in $rfc1918_nets; do
+                       mynet="$(rev_str "$mynet" ".")"
+                       cat <<EOF
+zone $mynet.in-addr.arpa. {
        primary 127.0.0.1;
        key local-ddns;
 }
 
 EOF
+               done
        fi
 
        if [ -n "$log_facility" ] ; then
@@ -494,9 +528,18 @@ start_service() {
 
                config_load dhcp
 
+               local rfc1918_nets=""
+
+               # alas we have to make 2 passes...
+               config_foreach dhcpd_add dhcp 0
+
+               rfc1918_nets="$(echo "$rfc1918_nets" | tr ' ' $'\n' | sort | uniq | tr $'\n' ' ')"
+
                general_config > $config_file
 
-               config_foreach dhcpd_add dhcp
+               rfc1918_nets=
+
+               config_foreach dhcpd_add dhcp 1
 
                static_hosts >> $config_file