dhcp-forwarder: New package

Signed-off-by: Scott K Logan <logans@cottsay.net>

net/dhcp-forwarder/Makefile

@@ -0,0 +1,74 @@
+#
+# Copyright (C) 2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=dhcp-forwarder
+PKG_VERSION:=0.11
+PKG_RELEASE:=1
+
+PKG_SOURCE_URL:=http://savannah.nongnu.org/download/dhcp-fwd/
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_MD5SUM:=9d1ea7939fef93ae7d7caef43397a908
+
+PKG_LICENSE:=GPL-2.0
+PKG_LICENSE_FILES:=COPYING
+
+PKG_MAINTAINER:=Scott K Logan <logans@cottsay.net>
+
+PKG_BUILD_PARALLEL:=1
+PKG_INSTALL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/dhcp-forwarder
+  SECTION:=net
+  CATEGORY:=Network
+  SUBMENU:=IP Addresses and Names
+  TITLE:=DHCP relay agent
+  URL:=http://www.nongnu.org/dhcp-fwd/
+  USERID:=dhcp-fwd=375:dhcp-fwd=375
+endef
+
+define Package/dhcp-forwarder/description
+  This program forwards DHCP messages between subnets with different sublayer
+  broadcast domains. It is similarly to the DHCP relay agent dhcrelay of ISC's
+  DHCP, but has the following features which are important for me:
+
+  - Runs as non-root in a chroot-jail
+  - Uses "normal" AF_INET sockets; this allows to uses packetfilters to filter
+    incoming messages.
+  - The DHCP agent IDs can be defined freely
+  - Has a small memory footprint when using dietlibc
+
+  It tries to be RFC 2131/2132 and 3046 compliant. Probably it works with BOOTP
+  (RFC 951) also, but since the handling of the giaddr field is described
+  misleading (see RFC 1542), there may occur problems.
+endef
+
+define Package/dhcp-forwarder/conffiles
+  /etc/dhcp-fwd.conf
+endef
+
+CONFIGURE_ARGS += \
+	--disable-dietlibc \
+
+define Build/Compile
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+	  DESTDIR="$(PKG_INSTALL_DIR)" \
+	  cfg_filename="/etc/dhcp-fwd.conf" \
+	  all install
+endef
+
+define Package/dhcp-forwarder/install
+	$(INSTALL_DIR) $(1)/usr/bin $(1)/etc $(1)/etc/init.d
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/dhcp-fwd $(1)/usr/bin/
+	$(INSTALL_CONF) $(PKG_BUILD_DIR)/contrib/dhcp-fwd.conf $(1)/etc/
+	$(INSTALL_BIN) ./files/dhcp-fwd.init $(1)/etc/init.d/dhcp-fwd
+endef
+
+$(eval $(call BuildPackage,dhcp-forwarder))

net/dhcp-forwarder/files/dhcp-fwd.init

@@ -0,0 +1,25 @@
+#!/bin/sh /etc/rc.common
+
+START=50
+USE_PROCD=1
+
+LOG_D=/var/log
+RUN_D=/var/run
+CHR_D=/var/lib/dhcp-fwd
+PID_F=$RUN_D/dhcp-fwd.pid
+
+start_service() {
+	[ -d $LOG_D ] || mkdir -p $LOG_D
+	[ -d $RUN_D ] || mkdir -p $RUN_D
+	[ -d $CHR_D ] || mkdir -p $CHR_D && chown dhcp-fwd:dhcp-fwd $CHR_D -R
+
+	procd_open_instance
+	procd_set_param command dhcp-fwd -n
+	procd_set_param respawn
+	procd_close_instance
+}
+
+service_triggers()
+{
+	procd_add_reload_trigger "dhcp"
+}