Add Dell network MIBs

Makefile

@@ -15,6 +15,7 @@
 .PHONY: all
 all:
 	@$(MAKE) -f Makefile.apc
+	@$(MAKE) -f Makefile.dell_network
 	@$(MAKE) -f Makefile.eltex
 	@$(MAKE) -f Makefile.fieldserver
 	@$(MAKE) -f Makefile.iana
@@ -26,6 +27,7 @@ all:
 .PHONY: clean
 clean:
 	@$(MAKE) -f Makefile.apc clean
+	@$(MAKE) -f Makefile.dell_network clean
 	@$(MAKE) -f Makefile.eltex clean
 	@$(MAKE) -f Makefile.fieldserver clean
 	@$(MAKE) -f Makefile.iana clean

Makefile.dell_network

@@ -0,0 +1,34 @@
+# Copyright The Prometheus Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include Makefile.curl
+
+DELL_NET_REFERER := https://www.dell.com/support/kbdoc/en-us/000181922/dell-networking-mibs
+DELL_NET_URL     := https://supportkb.dell.com/attachment/ka06P000000sxzWQAQ/Current_MIBs_pkb_en_US_1.tar
+
+all: dell_network/.done
+
+dell_network/.done:
+	@echo ">> Downloading Dell network MIBs"
+	$(eval TMP := $(shell mktemp))
+	$(eval TMPDIR := $(shell mktemp -d))
+	@curl $(CURL_OPTS) --referer $(DELL_NET_REFERER) -o $(TMP) "$(DELL_NET_URL)"
+	@tar -C $(TMPDIR) -xf $(TMP)
+	@tar -C dell_network --wildcards -zxf $(TMPDIR)/DELL-NETWORKING-MIB-9.14.2.1.tgz "DELL-NETWORKING*.mib"
+	@chmod a-x dell_network/*.mib
+	@rm -rv $(TMP) $(TMPDIR)
+	@touch $@
+
+.PHONY: clean
+clean:
+	rm -v dell_network/DELL-NETWORKING*.mib dell_network/.done