lldp: add snmp support and snmp-agentx

in order to expose the lldp information using
snmp, lldp must be compile with snmp support and
started with the proper switch. Besides snmp needs
the agentx MIB and configure the daemon to enable
a mater agent.

Signed-off-by: C.Prados <c.prados@gsi.de>

configs/buildroot/wrs_release_br2_config

@@ -2272,7 +2272,7 @@ BR2_PACKAGE_NETSNMP=y
 BR2_PACKAGE_NETSNMP_SERVER=y
 BR2_PACKAGE_NETSNMP_CLIENTS=y
 # BR2_PACKAGE_NETSNMP_ENABLE_MIBS is not set
-BR2_PACKAGE_NETSNMP_WITH_MIB_MODULES="host ucd-snmp/dlmod if-mib/ifXTable"
+BR2_PACKAGE_NETSNMP_WITH_MIB_MODULES="host ucd-snmp/dlmod if-mib/ifXTable agentx"
 BR2_PACKAGE_NETSNMP_WITHOUT_MIB_MODULES="disman/event disman/schedule utilities"
 # BR2_PACKAGE_NETSNMP_ENABLE_DEBUGGING is not set
 # BR2_PACKAGE_NETSTAT_NAT is not set

patches/buildroot/0009-lldp-support-and-patches.patch → patches/buildroot/0009-lldp-with-snmp-support.patch

-From e5a832ead5fd37822559b5485db0c12c98d060d0 Mon Sep 17 00:00:00 2001
+From c136c356d98fdea387581774f609269d276777aa Mon Sep 17 00:00:00 2001
 From: Cesar Prados <c.prados@gsi.de>
-Date: Mon, 29 May 2017 00:43:20 +0200
-Subject: [PATCH] lldp: add patches from buildroot master branch
- 2017.05-rc2-45-g019ad60
+Date: Thu, 8 Jun 2017 13:50:15 +0200
+Subject: [PATCH] lldp: add snmp support and netsnmp config path
 
+uses the lldp buildroot package of the commit 019ad60
 ---
  ...generation-of-atom-glue-compatible-with-o.patch | 43 +++++++++++++++
  .../0002-configure-do-not-check-for-libbsd.patch   | 61 ++++++++++++++++++++++
  package/lldpd/S60lldpd                             | 25 +++++++++
  package/lldpd/lldpd.hash                           |  2 +-
- package/lldpd/lldpd.mk                             | 18 ++++++-
- 5 files changed, 147 insertions(+), 2 deletions(-)
+ package/lldpd/lldpd.mk                             | 22 ++++++--
+ 5 files changed, 149 insertions(+), 4 deletions(-)
  create mode 100644 package/lldpd/0001-build-make-generation-of-atom-glue-compatible-with-o.patch
  create mode 100644 package/lldpd/0002-configure-do-not-check-for-libbsd.patch
  create mode 100644 package/lldpd/S60lldpd
@@ -171,7 +171,7 @@ index a6d905b..fc3d21f 100644
 -sha256 aac11cb1fdc037709517372c70c9bf89c752ab8e5eaab9ce140b84ed5a0507c8  lldpd-0.7.19.tar.gz
 +sha256 eb1f5beff2ff5c13c5e0342b5b9da815ed4a63866262445e1168a79ee65c9079  lldpd-0.9.4.tar.gz
 diff --git a/package/lldpd/lldpd.mk b/package/lldpd/lldpd.mk
-index 416967b..951c914 100644
+index 416967b..5ee5122 100644
 --- a/package/lldpd/lldpd.mk
 +++ b/package/lldpd/lldpd.mk
 @@ -4,11 +4,21 @@
@@ -181,7 +181,8 @@ index 416967b..951c914 100644
 -LLDPD_VERSION = 0.7.19
 +LLDPD_VERSION = 0.9.4
  LLDPD_SITE = http://media.luffy.cx/files/lldpd
- LLDPD_DEPENDENCIES = host-pkgconf libevent
+-LLDPD_DEPENDENCIES = host-pkgconf libevent
++LLDPD_DEPENDENCIES = host-pkgconf libevent netsnmp
  LLDPD_LICENSE = ISC
  LLDPD_LICENSE_FILES = README.md
 +# 0002-configure-do-not-check-for-libbsd.patch
@@ -197,14 +198,20 @@ index 416967b..951c914 100644
  
  # Detection of c99 support in configure fails without WCHAR. To enable
  # automatic detection of c99 support by configure, we need to enable
-@@ -16,6 +26,7 @@ LLDPD_LICENSE_FILES = README.md
+@@ -16,11 +26,12 @@ LLDPD_LICENSE_FILES = README.md
  # runtime. So requesting WCHAR in toolchain just for automatic detection
  # will be overkill. To solve this, explicitly -specify c99 here.
  LLDPD_CONF_ENV = ac_cv_prog_cc_c99=-std=gnu99
-+LLDPD_CONF_ENV += NETSNMP_CONFIG=$(HOST_DIR)/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/bin/net-snmp-config
++LLDPD_CONF_ENV += NETSNMP_CONFIG=$(STAGING_DIR)/usr/bin/net-snmp-config
  
  LLDPD_CONF_OPTS = \
  	--without-readline \
+ 	--without-embedded-libevent \
+-	--without-snmp \
++	--with-snmp \
+ 	--without-xml \
+ 	--without-json \
+ 	--without-seccomp \
 @@ -35,4 +46,9 @@ LLDPD_CONF_OPTS = \
  	$(if $(BR2_PACKAGE_LLDPD_DOT3),--enable-dot3,--disable-dot3) \
  	$(if $(BR2_PACKAGE_LLDPD_CUSTOM_TLV),--enable-custom,--disable-custom)

userspace/rootfs_override/etc/init.d/lldpd.sh

@@ -4,6 +4,8 @@
 #
 
 CONFIG=/etc/lldpd.conf
+LLDP=/usr/sbin/lldpd
+OPT=-x
 
 case $1 in
     start)
@@ -14,7 +16,7 @@ case $1 in
 	echo "resume" >> $CONFIG
 
 	printf "Starting lldpd: "
-	start-stop-daemon -S -q -p /var/run/lldpd.pid --exec /usr/sbin/lldpd
+        start-stop-daemon -S -q -p /var/run/lldpd.pid -x $LLDP -- $OPT
 	[ $? = 0 ] && echo "OK" || echo "FAIL"
 	;;
     stop)

userspace/rootfs_override/wr/etc/snmpd.conf.in

@@ -16,6 +16,8 @@ authtrapenable  1
 #rocommunity CONFIG_SNMP_RO_COMMUNITY
 #rwcommunity CONFIG_SNMP_RW_COMMUNITY
 
+master agentx
+
 # This is picked from /usr/lib, and the first argument is said to be the
 # "init function", but it is not, because the daemon adds a leading "init_"
 dlmod wrsSnmp /wr/lib/wrsSnmp.so