Initial Net-snmp frontend commit

Added apps/snmp with makefiles, autotools, docker adjustment
Minimal snmp_main program

.github/workflows/ci.yml

@@ -2,9 +2,9 @@ name: Clixon CI
 
 on:
   push:
-    branches: [ master, http-data ]
+    branches: [ master, snmp ]
   pull_request:
-    branches: [ master, http-data ]
+    branches: [ master, snmp ]
 
 jobs:
   build:

CHANGELOG.md

@@ -34,14 +34,35 @@
 * [3.3.2](#332) Aug 27 2017
 * [3.3.1](#331) June 7 2017
 
+### New features
+
+* Clixon SNMP frontend
+  * net-snmp and MIB to YANG translation
+  * Experimental work
+
+* Extended the Restconf implementation with a limited http-data static service
+  * Added two new config options to clixon-config.yang:
+     * `CLICON_HTTP_DATA_PATH`
+     * `CLICON_HTTP_DATA_ROOT`
+  * Added feature http-data to restconf-config.yang and the following option:
+     * `enable-http-data`
+  * The limited implementation is as follows:
+	* path: Local static files within `CLICON_WWW_DATA_ROOT`
+	* operation GET, HEAD, or OPTIONS
+	* query parameters not supported
+	* no indata
+        * media: html, css, js, fonts, image, 
+  7. Authentication, TLS, http/2 as restconf
+Generic changes:
+  * Uniform path selection across fcgi, native http/1 + http/2
+
+	
 ## 5.7.0
 17 May 2022
 
 The Clixon 5.7 release introduces (long overdue) NETCONF chunked framing as defined
 in RFC 6242. It also introduces a limited http data service and lots of bugfixes.
 
-### New features
-
 * Implementation of "chunked framing" according to RFC6242 for Netconf 1.1.
   * First hello is 1.0 EOM framing, then successing rpc is chunked framing
   * See

apps/Makefile.in

@@ -36,6 +36,7 @@ VPATH       	= @srcdir@
 srcdir  	= @srcdir@
 top_srcdir  	= @top_srcdir@
 with_restconf	= @with_restconf@
+enable_netsnmp	= @enable_netsnmp@
 
 SHELL	= /bin/sh
 
@@ -47,6 +48,11 @@ SUBDIRS += netconf
 ifdef with_restconf
 SUBDIRS += restconf
 endif
+ifdef enable_netsnmp
+ifeq ($(enable_netsnmp),yes)
+SUBDIRS += snmp
+endif
+endif
 
 .PHONY: all clean depend install $(SUBDIRS)
 

apps/snmp/Makefile.in

@@ -0,0 +1,131 @@
+#
+# ***** BEGIN LICENSE BLOCK *****
+# 
+# Copyright (C) 2022 Olof Hagsand and Kristofer Hallin
+#
+# This file is part of CLIXON
+#
+# 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.
+#
+# Alternatively, the contents of this file may be used under the terms of
+# the GNU General Public License Version 3 or later (the "GPL"),
+# in which case the provisions of the GPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of the GPL, and not to allow others to
+# use your version of this file under the terms of Apache License version 2, 
+# indicate your decision by deleting the provisions above and replace them with
+# the notice and other provisions required by the GPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the Apache License version 2 or the GPL.
+#
+# ***** END LICENSE BLOCK *****
+#
+#
+VPATH       	= @srcdir@
+srcdir  	= @srcdir@
+top_srcdir  	= @top_srcdir@
+CC		= @CC@
+CFLAGS  	= @CFLAGS@ 
+LINKAGE         = @LINKAGE@
+INSTALLFLAGS  	= @INSTALLFLAGS@ 
+LDFLAGS 	= @LDFLAGS@
+
+prefix 		= @prefix@
+datarootdir	= @datarootdir@
+exec_prefix 	= @exec_prefix@
+bindir 		= @bindir@
+libdir		= @libdir@
+sbindir 	= @sbindir@
+mandir		= @mandir@
+libexecdir	= @libexecdir@
+localstatedir	= @localstatedir@
+sysconfdir	= @sysconfdir@
+includedir	= @includedir@
+HOST_VENDOR     = @host_vendor@
+
+SH_SUFFIX	= @SH_SUFFIX@
+LIBSTATIC_SUFFIX = @LIBSTATIC_SUFFIX@
+CLIXON_MAJOR    = @CLIXON_VERSION_MAJOR@
+CLIXON_MINOR    = @CLIXON_VERSION_MINOR@
+
+# Use this clixon lib for linking
+ifeq ($(LINKAGE),dynamic)
+	CLIXON_LIB	= libclixon$(SH_SUFFIX).$(CLIXON_MAJOR).$(CLIXON_MINOR)
+else
+	CLIXON_LIB	= libclixon$(LIBSTATIC_SUFFIX)
+endif
+
+# For dependency
+LIBDEPS		= $(top_srcdir)/lib/src/$(CLIXON_LIB) 
+
+LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ 
+
+CPPFLAGS  	= @CPPFLAGS@
+
+ifeq ($(LINKAGE),dynamic)
+CPPFLAGS  	+= -fPIC
+endif
+
+INCLUDES	= -I. -I$(top_srcdir)/lib/src -I$(top_srcdir)/lib -I$(top_srcdir)/include -I$(top_srcdir) @INCLUDES@
+
+# Application
+APPL	  = clixon_snmp
+
+# Common source - not accessible from plugin - independent of restconf package (fcgi|native)
+APPSRC    =
+APPSRC   += snmp_main.c
+
+APPOBJ    = $(APPSRC:.c=.o)
+
+all:	 $(APPL)
+
+# Dependency of clixon library (LIBDEPS)
+$(top_srcdir)/lib/src/$(CLIXON_LIB):
+	(cd $(top_srcdir)/lib/src && $(MAKE) $(MFLAGS) $(CLIXON_LIB))
+
+clean:
+	rm -f *.core $(APPL) $(APPOBJ) *.o 
+	rm -f *.gcda *.gcno *.gcov # coverage
+
+distclean: clean
+	rm -f Makefile *~ .depend
+
+# Put daemon in bin 
+# Put other executables in libexec/
+install:	$(APPL)
+	install -d -m 0755 $(DESTDIR)$(sbindir)
+	install -m 0755 $(INSTALLFLAGS) $(APPL) $(DESTDIR)$(sbindir)
+
+install-include:
+
+uninstall:
+	rm -f $(DESTDIR)$(sbindir)/$(APPL)
+
+.SUFFIXES:
+.SUFFIXES: .c .o
+
+.c.o:
+	$(CC) $(INCLUDES) -D__PROGRAM__=\"clixon_snmp\" $(CPPFLAGS) $(CFLAGS) -c $<
+
+$(APPL) : $(APPOBJ) $(LIBDEPS)
+	echo $(APPOBJ)
+	echo $(LIBDEPS)
+	$(CC) $(LDFLAGS) $^ $(LIBS) -o $@
+
+TAGS:
+	find . -name '*.[chyl]' -print | etags -
+
+depend:
+	$(CC) $(DEPENDFLAGS) @DEFS@ $(INCLUDES) $(CFLAGS) -MM $(APPFCGI) $(APPSRC) > .depend
+
+#include .depend

apps/snmp/snmp_main.c

@@ -0,0 +1,327 @@
+/*
+ *
+  ***** BEGIN LICENSE BLOCK *****
+ 
+  Copyright (C) 2022 Olof Hagsand and Kristofer Hallin
+
+  This file is part of CLIXON.
+
+  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.
+
+  Alternatively, the contents of this file may be used under the terms of
+  the GNU General Public License Version 3 or later (the "GPL"),
+  in which case the provisions of the GPL are applicable instead
+  of those above. If you wish to allow use of your version of this file only
+  under the terms of the GPL, and not to allow others to
+  use your version of this file under the terms of Apache License version 2, 
+  indicate your decision by deleting the provisions above and replace them with
+  the  notice and other provisions required by the GPL. If you do not delete
+  the provisions above, a recipient may use your version of this file under
+  the terms of any one of the Apache License version 2 or the GPL.
+
+  ***** END LICENSE BLOCK *****
+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "clixon_config.h" /* generated by config & autoconf */
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <syslog.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <net-snmp/net-snmp-config.h>
+
+/* cligen */
+#include <cligen/cligen.h>
+
+/* clicon */
+#include <clixon/clixon.h>
+
+/* Command line options to be passed to getopt(3) */
+#define SNMP_OPTS "hD:f:l:o:"
+
+/*! XXX netsnmp API goes here
+ */
+static int
+snmp_input_cb(int   s, 
+	      void *arg)
+{
+    int retval = -1;
+    retval = 0;
+    // done:
+    return retval;
+}
+
+
+/*! Clean and close all state of netconf process (but dont exit). 
+ * Cannot use h after this 
+ * @param[in]  h  Clixon handle
+ */
+static int
+snmp_terminate(clicon_handle h)
+{
+    yang_stmt  *yspec;
+    cvec       *nsctx;
+    cxobj      *x;
+    
+    clicon_rpc_close_session(h);
+    if ((yspec = clicon_dbspec_yang(h)) != NULL)
+	ys_free(yspec);
+    if ((yspec = clicon_config_yang(h)) != NULL)
+	ys_free(yspec);
+    if ((nsctx = clicon_nsctx_global_get(h)) != NULL)
+	cvec_free(nsctx);
+    if ((x = clicon_conf_xml(h)) != NULL)
+	xml_free(x);
+    xpath_optimize_exit();
+    clixon_event_exit();
+    clicon_handle_exit(h);
+    clixon_err_exit();
+    clicon_log_exit();
+    return 0;
+}
+
+/*! Setup signal handlers
+ */
+static int
+snmp_signal_init (clicon_handle h)
+{
+    int retval = -1;
+    
+    if (set_signal(SIGPIPE, SIG_IGN, NULL) < 0){
+	clicon_err(OE_UNIX, errno, "Setting DIGPIPE signal");
+	goto done;
+    }
+    retval = 0;
+ done:
+    return retval;
+}
+
+/*! Usage help routine
+ * @param[in]  h      Clixon handle
+ * @param[in]  argv0  command line
+ */
+static void
+usage(clicon_handle h,
+      char         *argv0)
+{
+    fprintf(stderr, "usage:%s\n"
+	    "where options are\n"
+            "\t-h\t\tHelp\n"
+	    "\t-D <level>\tDebug level\n"
+    	    "\t-f <file>\tConfiguration file (mandatory)\n"
+	    "\t-l (e|o|s|f<file>) Log on std(e)rr, std(o)ut, (s)yslog(default), (f)ile\n"
+	    "\t-o \"<option>=<value>\"\tGive configuration option overriding config file (see clixon-config.yang)\n",
+	    argv0
+	    );
+    exit(0);
+}
+
+int
+main(int    argc,
+     char **argv)
+{
+    int              retval = -1;
+    int              c;
+    char            *argv0 = argv[0];
+    clicon_handle    h;
+    int              logdst = CLICON_LOG_STDERR;
+    struct passwd   *pw;
+    yang_stmt       *yspec = NULL;
+    char            *str;
+    uint32_t         id;
+    cvec            *nsctx_global = NULL; /* Global namespace context */
+    size_t           cligen_buflen;
+    size_t           cligen_bufthreshold;
+    int              dbg = 0;
+    size_t           sz;
+    
+    /* Create handle */
+    if ((h = clicon_handle_init()) == NULL)
+	return -1;
+    /* In the startup, logs to stderr & debug flag set later */
+    clicon_log_init(__PROGRAM__, LOG_INFO, logdst); 
+
+    /* Set username to clixon handle. Use in all communication to backend */
+    if ((pw = getpwuid(getuid())) == NULL){
+	clicon_err(OE_UNIX, errno, "getpwuid");
+	goto done;
+    }
+    if (clicon_username_set(h, pw->pw_name) < 0)
+	goto done;
+    while ((c = getopt(argc, argv, SNMP_OPTS)) != -1)
+	switch (c) {
+	case 'h' : /* help */
+	    usage(h, argv[0]);
+	    break;
+	case 'D' : /* debug */
+	    if (sscanf(optarg, "%d", &dbg) != 1)
+		usage(h, argv[0]);
+	    break;
+	 case 'f': /* override config file */
+	    if (!strlen(optarg))
+		usage(h, argv[0]);
+	    clicon_option_str_set(h, "CLICON_CONFIGFILE", optarg);
+	    break;
+	 case 'l': /* Log destination: s|e|o */
+	    if ((logdst = clicon_log_opt(optarg[0])) < 0)
+		usage(h, argv[0]);
+	    if (logdst == CLICON_LOG_FILE &&
+		strlen(optarg)>1 &&
+		clicon_log_file(optarg+1) < 0)
+		goto done;
+	     break;
+	}
+
+    /* 
+     * Logs, error and debug to stderr or syslog, set debug level
+     */
+    clicon_log_init(__PROGRAM__, dbg?LOG_DEBUG:LOG_INFO, logdst); 
+    clicon_debug_init(dbg, NULL); 
+    yang_init(h);
+    
+    /* Find, read and parse configfile */
+    if (clicon_options_main(h) < 0)
+	goto done;
+    
+    /* Now rest of options */
+    optind = 1;
+    opterr = 0;
+    while ((c = getopt(argc, argv, SNMP_OPTS)) != -1)
+	switch (c) {
+	case 'h' : /* help */
+	case 'D' : /* debug */
+	case 'f':  /* config file */
+	case 'l':  /* log  */
+	    break; /* see above */
+	case 'o':{ /* Configuration option */
+	    char          *val;
+	    if ((val = index(optarg, '=')) == NULL)
+		usage(h, argv0);
+	    *val++ = '\0';
+	    if (clicon_option_add(h, optarg, val) < 0)
+		goto done;
+	    break;
+	}
+	default:
+	    usage(h, argv[0]);
+	    break;
+	}
+    argc -= optind;
+    argv += optind;
+
+    /* Access the remaining argv/argc options (after --) w clicon-argv_get() */
+    clicon_argv_set(h, argv0, argc, argv);
+
+    /* Init cligen buffers */
+    cligen_buflen = clicon_option_int(h, "CLICON_CLI_BUF_START");
+    cligen_bufthreshold = clicon_option_int(h, "CLICON_CLI_BUF_THRESHOLD");
+    cbuf_alloc_set(cligen_buflen, cligen_bufthreshold);
+
+    if ((sz = clicon_option_int(h, "CLICON_LOG_STRING_LIMIT")) != 0)
+	clicon_log_string_limit_set(sz);
+
+    /* Set default namespace according to CLICON_NAMESPACE_NETCONF_DEFAULT */
+    xml_nsctx_namespace_netconf_default(h);
+
+    /* Add (hardcoded) netconf features in case ietf-netconf loaded here
+     * Otherwise it is loaded in netconf_module_load below
+     */
+    if (netconf_module_features(h) < 0)
+	goto done;
+
+    /* Setup signal handlers, int particular PIPE that occurs if backend closes / restarts */
+    if (snmp_signal_init(h) < 0)
+	goto done;
+    
+    /* In case ietf-yang-metadata is loaded by application, handle annotation extension */
+    if (0 && yang_metadata_init(h) < 0)
+	goto done;    
+    /* Create top-level yang spec and store as option */
+    if ((yspec = yspec_new()) == NULL)
+	goto done;
+    clicon_dbspec_yang_set(h, yspec);	
+
+    /* Load Yang modules
+     * 1. Load a yang module as a specific absolute filename */
+    if ((str = clicon_yang_main_file(h)) != NULL){
+	if (yang_spec_parse_file(h, str, yspec) < 0)
+	    goto done;
+    }
+    /* 2. Load a (single) main module */
+    if ((str = clicon_yang_module_main(h)) != NULL){
+	if (yang_spec_parse_module(h, str, clicon_yang_module_revision(h),
+				   yspec) < 0)
+	    goto done;
+    }
+    /* 3. Load all modules in a directory */
+    if ((str = clicon_yang_main_dir(h)) != NULL){
+	if (yang_spec_load_dir(h, str, yspec) < 0)
+	    goto done;
+    }
+    /* Load clixon lib yang module */
+    if (yang_spec_parse_module(h, "clixon-lib", NULL, yspec) < 0)
+	goto done;
+     /* Load yang module library, RFC7895 */
+    if (yang_modules_init(h) < 0)
+	goto done;
+    /* Add netconf yang spec, used by netconf client and as internal protocol */
+    if (netconf_module_load(h) < 0)
+	goto done;
+    /* Here all modules are loaded 
+     * Compute and set canonical namespace context
+     */
+    if (xml_nsctx_yangspec(yspec, &nsctx_global) < 0)
+	goto done;
+    if (clicon_nsctx_global_set(h, nsctx_global) < 0)
+	goto done;
+
+    /* Call start function is all plugins before we go interactive */
+    if (clixon_plugin_start_all(h) < 0)
+	goto done;
+#if 1
+    /* XXX get session id from backend hello */
+    clicon_session_id_set(h, getpid()); 
+#endif
+
+    /* Send hello request to backend to get session-id back
+     * This is done once at the beginning of the session and then this is
+     * used by the client, even though new TCP sessions are created for
+     * each message sent to the backend.
+     */
+    if (clicon_hello_req(h, &id) < 0)
+	goto done;
+    clicon_session_id_set(h, id);
+    
+    /* XXX Here should register an net-snmp interface socket
+     * But it registers stdin which is wrong
+     */
+    if (clixon_event_reg_fd(0, snmp_input_cb, h, "snmp socket") < 0)
+	goto done;
+
+    if (dbg)
+	clicon_option_dump(h, dbg);
+    if (clixon_event_loop(h) < 0)
+	goto done;
+    retval = 0;
+  done:
+    snmp_terminate(h);
+    clicon_log_init(__PROGRAM__, LOG_INFO, 0); /* Log on syslog no stderr */
+    clicon_log(LOG_NOTICE, "%s: %u Terminated", __PROGRAM__, getpid());
+    return retval;
+}

configure

@@ -638,6 +638,7 @@ CLIXON_YANG_PATCH
 with_libxml2
 HAVE_HTTP1
 HAVE_LIBNGHTTP2
+enable_netsnmp
 with_restconf
 LINKAGE
 LIBSTATIC_SUFFIX
@@ -722,6 +723,7 @@ enable_publish
 with_restconf
 enable_http1
 enable_nghttp2
+enable_netsnmp
 with_configfile
 with_libxml2
 with_sigaction
@@ -1374,6 +1376,7 @@ Optional Features:
                           only
   --disable-nghttp2       Disable nghttp2 for native restconf http/2, ie
                           http/1 only
+  --enable-netsnmp        Enable net-snmp Clixon YANG mapping
 
 
 Optional Packages:
@@ -3385,7 +3388,8 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 
 
 
- # Set to native or fcgi -> compile apps/restconf
+  # Set to native or fcgi -> compile apps/restconf
+ # Enable build of apps/snmp
 HAVE_LIBNGHTTP2=false
  # consider using neutral constant such as with-http2
 HAVE_HTTP1=false
@@ -5301,6 +5305,87 @@ if test "${with_restconf+set}" = set; then :
 fi
 
 
+# This is for net-snmp
+# Check whether --enable-netsnmp was given.
+if test "${enable_netsnmp+set}" = set; then :
+  enableval=$enable_netsnmp;
+   if test "$enableval" = no; then
+      enable_netsnmp=no
+   else
+      enable_netsnmp=yes
+   fi
+
+else
+   enable_netsnmp=no
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: checking netsnmp is enabled: $enable_netsnmp" >&5
+$as_echo "checking netsnmp is enabled: $enable_netsnmp" >&6; }
+
+if test "$enable_netsnmp" = "yes"; then
+   # All libs are:
+   # libnetsnmp, libnetsnmpmibs, libnetsnmpagent, libnetsnmptrapd, libnetsnmphelpers
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for snmp_open in -lnetsnmp" >&5
+$as_echo_n "checking for snmp_open in -lnetsnmp... " >&6; }
+if ${ac_cv_lib_netsnmp_snmp_open+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lnetsnmp  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char snmp_open ();
+int
+main ()
+{
+return snmp_open ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_netsnmp_snmp_open=yes
+else
+  ac_cv_lib_netsnmp_snmp_open=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_netsnmp_snmp_open" >&5
+$as_echo "$ac_cv_lib_netsnmp_snmp_open" >&6; }
+if test "x$ac_cv_lib_netsnmp_snmp_open" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBNETSNMP 1
+_ACEOF
+
+  LIBS="-lnetsnmp $LIBS"
+
+fi
+
+   for ac_header in net-snmp/net-snmp-config.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "net-snmp/net-snmp-config.h" "ac_cv_header_net_snmp_net_snmp_config_h" "$ac_includes_default"
+if test "x$ac_cv_header_net_snmp_net_snmp_config_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_NET_SNMP_NET_SNMP_CONFIG_H 1
+_ACEOF
+
+else
+  as_fn_error $? "snmp is missing" "$LINENO" 5
+fi
+
+done
+
+fi
+
 # Set default config file location
 CLIXON_DEFAULT_CONFIG=/usr/local/etc/clixon.xml
 
@@ -5569,7 +5654,7 @@ fi
 
 
 
-ac_config_files="$ac_config_files Makefile lib/Makefile lib/src/Makefile lib/clixon/Makefile apps/Makefile apps/cli/Makefile apps/backend/Makefile apps/netconf/Makefile apps/restconf/Makefile include/Makefile etc/Makefile etc/clixonrc example/Makefile example/main/Makefile example/main/example.xml extras/rpm/Makefile docker/Makefile docker/base/Makefile docker/clixon-dev/Makefile docker/main/Makefile util/Makefile yang/Makefile yang/clixon/Makefile yang/mandatory/Makefile doc/Makefile test/Makefile test/config.sh test/cicd/Makefile test/vagrant/Makefile"
+ac_config_files="$ac_config_files Makefile lib/Makefile lib/src/Makefile lib/clixon/Makefile apps/Makefile apps/cli/Makefile apps/backend/Makefile apps/netconf/Makefile apps/restconf/Makefile apps/snmp/Makefile include/Makefile etc/Makefile etc/clixonrc example/Makefile example/main/Makefile example/main/example.xml extras/rpm/Makefile docker/Makefile docker/base/Makefile docker/clixon-dev/Makefile docker/main/Makefile util/Makefile yang/Makefile yang/clixon/Makefile yang/mandatory/Makefile doc/Makefile test/Makefile test/config.sh test/cicd/Makefile test/vagrant/Makefile"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -6272,6 +6357,7 @@ do
     "apps/backend/Makefile") CONFIG_FILES="$CONFIG_FILES apps/backend/Makefile" ;;
     "apps/netconf/Makefile") CONFIG_FILES="$CONFIG_FILES apps/netconf/Makefile" ;;
     "apps/restconf/Makefile") CONFIG_FILES="$CONFIG_FILES apps/restconf/Makefile" ;;
+    "apps/snmp/Makefile") CONFIG_FILES="$CONFIG_FILES apps/snmp/Makefile" ;;
     "include/Makefile") CONFIG_FILES="$CONFIG_FILES include/Makefile" ;;
     "etc/Makefile") CONFIG_FILES="$CONFIG_FILES etc/Makefile" ;;
     "etc/clixonrc") CONFIG_FILES="$CONFIG_FILES etc/clixonrc" ;;
@@ -6878,4 +6964,3 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
-

configure.ac

@@ -114,7 +114,8 @@ AC_SUBST(LIBS)
 AC_SUBST(SH_SUFFIX)
 AC_SUBST(LIBSTATIC_SUFFIX)
 AC_SUBST(LINKAGE)
-AC_SUBST(with_restconf) # Set to native or fcgi -> compile apps/restconf
+AC_SUBST(with_restconf)  # Set to native or fcgi -> compile apps/restconf
+AC_SUBST(enable_netsnmp) # Enable build of apps/snmp
 AC_SUBST(HAVE_LIBNGHTTP2,false) # consider using neutral constant such as with-http2
 AC_SUBST(HAVE_HTTP1,false) 
 AC_SUBST(with_libxml2)  
@@ -275,6 +276,24 @@ AC_ARG_WITH([restconf],
 AC_ARG_WITH([restconf],
 	    AS_HELP_STRING([--without-restconf],[Disable restconf altogether]))
 
+# This is for net-snmp
+AC_ARG_ENABLE(netsnmp, AS_HELP_STRING([--enable-netsnmp],[Enable net-snmp Clixon YANG mapping]),[
+   if test "$enableval" = no; then
+      enable_netsnmp=no
+   else	      
+      enable_netsnmp=yes
+   fi
+  ],
+  [ enable_netsnmp=no])
+AC_MSG_RESULT(checking netsnmp is enabled: $enable_netsnmp)
+
+if test "$enable_netsnmp" = "yes"; then
+   # All libs are:
+   # libnetsnmp, libnetsnmpmibs, libnetsnmpagent, libnetsnmptrapd, libnetsnmphelpers
+   AC_CHECK_LIB(netsnmp, snmp_open)      
+   AC_CHECK_HEADERS(net-snmp/net-snmp-config.h,[], AC_MSG_ERROR([snmp is missing]))
+fi 
+
 # Set default config file location
 CLIXON_DEFAULT_CONFIG=/usr/local/etc/clixon.xml
 AC_ARG_WITH([configfile],
@@ -352,6 +371,7 @@ AC_OUTPUT(Makefile
 	  apps/backend/Makefile 
 	  apps/netconf/Makefile
 	  apps/restconf/Makefile
+  	  apps/snmp/Makefile
 	  include/Makefile
 	  etc/Makefile
 	  etc/clixonrc
@@ -373,4 +393,3 @@ AC_OUTPUT(Makefile
 	  test/cicd/Makefile
   	  test/vagrant/Makefile	
 )
-

docker/main/Dockerfile.native

@@ -41,6 +41,9 @@ RUN apk add --update git make build-base gcc flex bison curl-dev
 # nghttp2 dependencies
 RUN apk add --update nghttp2
 
+# For netsnmp
+RUN apk add --update net-snmp
+
 # Checkut models
 WORKDIR /usr/local/share/
 
@@ -88,7 +91,7 @@ WORKDIR /clixon/clixon
 COPY clixon .
 
 # Configure, build and install clixon
-RUN ./configure --prefix=/clixon/build --with-cligen=/clixon/build --with-restconf=native --enable-nghttp2 --enable-http1 --with-yang-standard-dir=/usr/local/share/yang/standard
+RUN ./configure --prefix=/clixon/build --with-cligen=/clixon/build --with-restconf=native --enable-nghttp2 --enable-http1 --with-yang-standard-dir=/usr/local/share/yang/standard # --enable-netsnmp
 
 RUN make
 RUN make install

include/clixon_config.h.in

@@ -33,7 +33,7 @@
 /* Define to 1 if you have the `getresuid' function. */
 #undef HAVE_GETRESUID
 
-/* Enable HTTP/1 (default true) */
+/* Set to true to enable Native HTTP/1 */
 #undef HAVE_HTTP1
 
 /* Define to 1 if you have the `inet_aton' function. */
@@ -60,6 +60,9 @@
 /* Define to 1 if you have the `m' library (-lm). */
 #undef HAVE_LIBM
 
+/* Define to 1 if you have the `netsnmp' library (-lnetsnmp). */
+#undef HAVE_LIBNETSNMP
+
 /* Define to 1 if you have the `nghttp2' library (-lnghttp2). */
 #undef HAVE_LIBNGHTTP2
 
@@ -75,6 +78,9 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
+/* Define to 1 if you have the <net-snmp/net-snmp-config.h> header file. */
+#undef HAVE_NET_SNMP_NET_SNMP_CONFIG_H
+
 /* Define to 1 if you have the <nghttp2/nghttp2.h> header file. */
 #undef HAVE_NGHTTP2_NGHTTP2_H