Revert "Removing dhcpmon"

This reverts commit 88ad212.

src/dhcpmon/.gitignore

@@ -0,0 +1,5 @@
+debian/*
+!debian/changelog
+!debian/compat
+!debian/control
+!debian/rules

src/dhcpmon/Makefile

@@ -0,0 +1,45 @@
+RM := rm -rf
+DHCPMON_TARGET := dhcpmon
+CP := cp
+MKDIR := mkdir
+CC := g++
+MV := mv
+PWD := $(shell pwd)
+
+# All of the sources participating in the build are defined here
+-include src/subdir.mk
+-include objects.mk
+
+ifneq ($(MAKECMDGOALS),clean)
+ifneq ($(strip $(C_DEPS)),)
+-include $(C_DEPS)
+endif
+endif
+
+# Add inputs and outputs from these tool invocations to the build variables 
+
+# All Target
+all: sonic-dhcpmon
+
+# Tool invocations
+sonic-dhcpmon: $(OBJS) $(USER_OBJS)
+ @echo 'Building target: $@'
+ @echo 'Invoking: G++ C Linker'
+ $(CC) -o "$(DHCPMON_TARGET)" $(OBJS) $(USER_OBJS) $(LIBS)
+ @echo 'Finished building target: $@'
+ @echo ' '
+
+# Other Targets
+install:
+ $(MKDIR) -p $(DESTDIR)/usr/sbin
+ $(MV) $(DHCPMON_TARGET) $(DESTDIR)/usr/sbin
+
+deinstall:
+ $(RM) $(DESTDIR)/usr/sbin/$(DHCPMON_TARGET)
+ $(RM) -rf $(DESTDIR)/usr/sbin
+
+clean:
+ -$(RM) $(EXECUTABLES)$(OBJS)$(C_DEPS) $(DHCPMON_TARGET)
+ -@echo ' '
+
+.PHONY: all clean dependents

src/dhcpmon/debian/changelog

@@ -0,0 +1,5 @@
+sonic-dhcpmon (1.0.0-0) UNRELEASED; urgency=medium
+
+ * Initial release.
+
+ -- Tamer Ahmed <tamer.ahmed@microsoft.com> Mon, 09 Dec 2019 12:00:00 -0700

src/dhcpmon/debian/compat

@@ -0,0 +1 @@
+12

src/dhcpmon/debian/control

@@ -0,0 +1,14 @@
+Source: sonic-dhcpmon
+Section: devel
+Priority: optional
+Maintainer: Tamer Ahmed <tamer.ahmed@microsoft.com>
+Build-Depends: debhelper (>= 12.0.0), libevent-dev, libexplain-dev
+Standards-Version: 3.9.3
+Homepage: https://github.com/Azure/sonic-buildimage
+XS-Go-Import-Path: github.com/Azure/sonic-buildimage
+
+Package: sonic-dhcpmon
+Architecture: any
+Built-Using: ${misc:Built-Using}
+Depends: ${shlibs:Depends}
+Description: SONiC DHCP Monitor

src/dhcpmon/debian/rules

@@ -0,0 +1,9 @@
+#!/usr/bin/make -f
+
+export DEB_BUILD_MAINT_OPTIONS=hardening=+all
+
+DEB_CFLAGS_APPEND=-std=gnu11
+export DEB_CFLAGS_APPEND
+
+%:
+ dh $@ --parallel

src/dhcpmon/objects.mk

@@ -0,0 +1,4 @@
+USER_OBJS :=
+
+LIBS := -levent -lexplain -lswsscommon -pthread -lboost_thread -lboost_system -lhiredis
+