dnsmasq: add dhcp-script hook for other packages
Adds a script which acts as a hook for when dnsmasq creates/destroys a lease, or completes a TFTP file transfer. The hook loops through scripts in appropriate directories inside '/etc/hotplug.d', executing each one with the same arguments supplied by dnsmasq. In case dnsmasq is jailed by ujail the dhcp-script hook will not work as expected as ujail does not yet support executing a script within a jail. Signed-off-by: Nick Brassel <nick@tzarc.org> Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
This commit is contained in:
Nick Brassel
Hans Dedecker
parent
822ee54544
commit
b32689afd6
3 changed files with 59 additions and 5 deletions
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
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PKG_NAME:=dnsmasq
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PKG_VERSION:=2.77rc5
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PKG_RELEASE:=1
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PKG_RELEASE:=2
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PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
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PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq/release-candidates
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@ -150,10 +150,15 @@ define Package/dnsmasq/install
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$(INSTALL_DATA) ./files/dnsmasq.conf $(1)/etc/dnsmasq.conf
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$(INSTALL_DIR) $(1)/etc/init.d
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$(INSTALL_BIN) ./files/dnsmasq.init $(1)/etc/init.d/dnsmasq
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$(INSTALL_DIR) $(1)/etc/hotplug.d/dhcp
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$(INSTALL_DIR) $(1)/etc/hotplug.d/neigh
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$(INSTALL_DIR) $(1)/etc/hotplug.d/ntp
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$(INSTALL_DIR) $(1)/etc/hotplug.d/tftp
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$(INSTALL_DATA) ./files/dnsmasqsec.hotplug $(1)/etc/hotplug.d/ntp/25-dnsmasqsec
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$(INSTALL_DIR) $(1)/usr/share/dnsmasq
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$(INSTALL_DATA) ./files/rfc6761.conf $(1)/usr/share/dnsmasq/
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$(INSTALL_DIR) $(1)/usr/lib/dnsmasq
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$(INSTALL_BIN) ./files/dhcp-script.sh $(1)/usr/lib/dnsmasq/dhcp-script.sh
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endef
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Package/dnsmasq-dhcpv6/install = $(Package/dnsmasq/install)
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46
package/network/services/dnsmasq/files/dhcp-script.sh
Executable file
46
package/network/services/dnsmasq/files/dhcp-script.sh
Executable file
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@ -0,0 +1,46 @@
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#!/bin/sh
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[ -f "$USER_DHCPSCRIPT" ] && . "$USER_DHCPSCRIPT" "$@"
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case "$1" in
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add)
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export ACTION="add"
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export MACADDR="$2"
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export IPADDR="$3"
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export HOSTNAME="$4"
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exec /sbin/hotplug-call dhcp
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;;
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del)
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export ACTION="remove"
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export MACADDR="$2"
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export IPADDR="$3"
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export HOSTNAME="$4"
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exec /sbin/hotplug-call dhcp
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;;
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old)
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export ACTION="update"
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export MACADDR="$2"
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export IPADDR="$3"
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export HOSTNAME="$4"
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exec /sbin/hotplug-call dhcp
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;;
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arp-add)
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export ACTION="add"
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export MACADDR="$2"
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export IPADDR="$3"
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exec /sbin/hotplug-call neigh
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;;
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arp-del)
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export ACTION="remove"
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export MACADDR="$2"
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export IPADDR="$3"
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exec /sbin/hotplug-call neigh
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;;
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tftp)
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export ACTION="add"
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export TFTP_SIZE="$2"
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export TFTP_ADDR="$3"
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export TFTP_PATH="$4"
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exec /sbin/hotplug-call tftp
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;;
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esac
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@ -18,6 +18,7 @@ TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
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TIMEVALIDFILE="/var/state/dnsmasqsec"
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BASEDHCPSTAMPFILE="/var/run/dnsmasq"
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RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
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DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
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DNSMASQ_DHCP_VER=4
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@ -696,7 +697,7 @@ dhcp_relay_add() {
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dnsmasq_start()
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{
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local cfg="$1" disabled resolvfile
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local cfg="$1" disabled resolvfile user_dhcpscript
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config_get_bool disabled "$cfg" disabled 0
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[ "$disabled" -gt 0 ] && return 0
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@ -791,7 +792,7 @@ dnsmasq_start()
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append_bool "$cfg" noping "--no-ping"
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append_parm "$cfg" logfacility "--log-facility"
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append_parm "$cfg" dhcpscript "--dhcp-script"
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append_parm "$cfg" cachesize "--cache-size"
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append_parm "$cfg" dnsforwardmax "--dns-forward-max"
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append_parm "$cfg" port "--port"
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@ -831,7 +832,8 @@ dnsmasq_start()
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config_get_bool readethers "$cfg" readethers
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[ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
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config_get dhcpscript $cfg dhcpscript
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xappend "--dhcp-script=$DHCPSCRIPT"
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config_get user_dhcpscript $cfg dhcpscript
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config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
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[ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
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@ -971,6 +973,7 @@ dnsmasq_start()
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procd_open_instance $cfg
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procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
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procd_set_param file $CONFIGFILE
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[ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
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procd_set_param respawn
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local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
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@ -979,7 +982,7 @@ dnsmasq_start()
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fi
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procd_add_jail dnsmasq ubus log
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procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $dhcpscript /etc/hosts /etc/ethers $EXTRA_MOUNT
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procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
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procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
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procd_close_instance
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