Add service maintenance message support

This is the companion commit to libpri r732. Service messages are now supported
for switch types 4ess/5ess. A new option service_message_support has been added
to chan_dahdi.conf and is noted in the sample config file. The service message
support is turned off by default. The current implementation relies on AstDB
to keep track of channel state, which allows the statuses to be preserved
across Asterisk restarts. Below is a description of the storage format.

The state and reason for the service state are in the form <state>:<reason>,
where:
<state> ::= { 'O' }  // 'O' – Out Of Service
<reason> ::= { '0' | '1' | '2' | '3' }, where:
'0' – No reason (backwards compatibility)
'1' – NEAR END
'2' – FAR END
'3' – both NEAR and FAR END

The new CLI commands to handle channel service state are:
pri service disable channel <chan>
pri service enable channel <chan>

Many people contributed to the development of this functionality. Because I
entered at the very end I do not know the exact history. Special thanks to 
all who moved the bug forward one way or another:
cmaj, PCadach, markster, mattf, drmac, MikeJ, serge-v, murf, kanelbullar, Seb7,
tilghman, lmadsen, and especially dhubbard (he answered lots of my questions
and did a large portion of the work)

(closes issue #3450)
Reported by: cmaj



git-svn-id: http://svn.digium.com/svn/asterisk/trunk@188342 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 263 insertions, 1 deletions

diff --git a/configure b/configure
index 0725b2927..771a1159e 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 182847 .
+# From configure.ac Revision: 183242 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.6.
 #
@@ -42037,6 +42037,268 @@ fi
 
 
 
+if test "x${PBX_PRI_SERVICE_MESSAGES}" != "x1" -a "${USE_PRI_SERVICE_MESSAGES}" != "no"; then
+   pbxlibdir=""
+   # if --with-PRI_SERVICE_MESSAGES=DIR has been specified, use it.
+   if test "x${PRI_SERVICE_MESSAGES_DIR}" != "x"; then
+      if test -d ${PRI_SERVICE_MESSAGES_DIR}/lib; then
+      	 pbxlibdir="-L${PRI_SERVICE_MESSAGES_DIR}/lib"
+      else
+      	 pbxlibdir="-L${PRI_SERVICE_MESSAGES_DIR}"
+      fi
+   fi
+   pbxfuncname="pri_maintenance_service"
+   if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
+      AST_PRI_SERVICE_MESSAGES_FOUND=yes
+   else
+      as_ac_Lib=`echo "ac_cv_lib_pri_${pbxfuncname}" | $as_tr_sh`
+{ echo "$as_me:$LINENO: checking for ${pbxfuncname} in -lpri" >&5
+echo $ECHO_N "checking for ${pbxfuncname} in -lpri... $ECHO_C" >&6; }
+if { as_var=$as_ac_Lib; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpri ${pbxlibdir}  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* 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 ${pbxfuncname} ();
+int
+main ()
+{
+return ${pbxfuncname} ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext &&
+       $as_test_x conftest$ac_exeext; then
+  eval "$as_ac_Lib=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	eval "$as_ac_Lib=no"
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+ac_res=`eval echo '${'$as_ac_Lib'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+if test `eval echo '${'$as_ac_Lib'}'` = yes; then
+  AST_PRI_SERVICE_MESSAGES_FOUND=yes
+else
+  AST_PRI_SERVICE_MESSAGES_FOUND=no
+fi
+
+   fi
+
+   # now check for the header.
+   if test "${AST_PRI_SERVICE_MESSAGES_FOUND}" = "yes"; then
+      PRI_SERVICE_MESSAGES_LIB="${pbxlibdir} -lpri "
+      # if --with-PRI_SERVICE_MESSAGES=DIR has been specified, use it.
+      if test "x${PRI_SERVICE_MESSAGES_DIR}" != "x"; then
+	 PRI_SERVICE_MESSAGES_INCLUDE="-I${PRI_SERVICE_MESSAGES_DIR}/include"
+      fi
+      PRI_SERVICE_MESSAGES_INCLUDE="${PRI_SERVICE_MESSAGES_INCLUDE} "
+      if test "xlibpri.h" = "x" ; then	# no header, assume found
+         PRI_SERVICE_MESSAGES_HEADER_FOUND="1"
+      else				# check for the header
+         saved_cppflags="${CPPFLAGS}"
+         CPPFLAGS="${CPPFLAGS} ${PRI_SERVICE_MESSAGES_INCLUDE}"
+	 if test "${ac_cv_header_libpri_h+set}" = set; then
+  { echo "$as_me:$LINENO: checking for libpri.h" >&5
+echo $ECHO_N "checking for libpri.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_libpri_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_libpri_h" >&5
+echo "${ECHO_T}$ac_cv_header_libpri_h" >&6; }
+else
+  # Is the header compilable?
+{ echo "$as_me:$LINENO: checking libpri.h usability" >&5
+echo $ECHO_N "checking libpri.h usability... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <libpri.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_header_compiler=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ echo "$as_me:$LINENO: checking libpri.h presence" >&5
+echo $ECHO_N "checking libpri.h presence... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <libpri.h>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: libpri.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: libpri.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: libpri.h: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: libpri.h: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: libpri.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: libpri.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: libpri.h:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: libpri.h:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: libpri.h: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: libpri.h: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: libpri.h:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: libpri.h:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: libpri.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: libpri.h: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: libpri.h: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: libpri.h: in the future, the compiler will take precedence" >&2;}
+    ( cat <<\_ASBOX
+## ------------------------------- ##
+## Report this to www.asterisk.org ##
+## ------------------------------- ##
+_ASBOX
+     ) | sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+{ echo "$as_me:$LINENO: checking for libpri.h" >&5
+echo $ECHO_N "checking for libpri.h... $ECHO_C" >&6; }
+if test "${ac_cv_header_libpri_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_header_libpri_h=$ac_header_preproc
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_header_libpri_h" >&5
+echo "${ECHO_T}$ac_cv_header_libpri_h" >&6; }
+
+fi
+if test $ac_cv_header_libpri_h = yes; then
+  PRI_SERVICE_MESSAGES_HEADER_FOUND=1
+else
+  PRI_SERVICE_MESSAGES_HEADER_FOUND=0
+fi
+
+
+         CPPFLAGS="${saved_cppflags}"
+      fi
+      if test "x${PRI_SERVICE_MESSAGES_HEADER_FOUND}" = "x0" ; then
+         PRI_SERVICE_MESSAGES_LIB=""
+         PRI_SERVICE_MESSAGES_INCLUDE=""
+      else
+         if test "x${pbxfuncname}" = "x" ; then		# only checking headers -> no library
+	    PRI_SERVICE_MESSAGES_LIB=""
+	 fi
+         PBX_PRI_SERVICE_MESSAGES=1
+         # XXX don't know how to evaluate the description (third argument) in AC_DEFINE_UNQUOTED
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_PRI_SERVICE_MESSAGES 1
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_PRI_SERVICE_MESSAGES_VERSION
+_ACEOF
+
+      fi
+   fi
+fi
+
+
+
 if test "x${PBX_RESAMPLE}" != "x1" -a "${USE_RESAMPLE}" != "no"; then
    pbxlibdir=""
    # if --with-RESAMPLE=DIR has been specified, use it.