res_pjsip_outbound_authenticator_digest.c: Fix memory pool leak.

Responding to authentication challenges leaks PJSIP memory pools.

The leak was introduced with a pjproject 2.5.5 API change.
https://trac.pjsip.org/repos/ticket/1929 changed the API usage of
pjsip_auth_clt_init() to require the new API pjsip_auth_clt_deinit() to
clean up cached authentication allocations that get allocated with
pjsip_auth_clt_reinit_req().

ASTERISK-26516 #close

Change-Id: I4473141b8c3961d0dc91c382beb3876b3efb45c8

configure

@@ -943,6 +943,10 @@ PBX_POPT
 POPT_DIR
 POPT_INCLUDE
 POPT_LIB
+PBX_PJSIP_AUTH_CLT_DEINIT
+PJSIP_AUTH_CLT_DEINIT_DIR
+PJSIP_AUTH_CLT_DEINIT_INCLUDE
+PJSIP_AUTH_CLT_DEINIT_LIB
 PBX_PJSIP_INV_SESSION_REF
 PJSIP_INV_SESSION_REF_DIR
 PJSIP_INV_SESSION_REF_INCLUDE
@@ -9292,6 +9296,9 @@ $as_echo "#define HAVE_PJSIP_EVSUB_GRP_LOCK 1" >>confdefs.h
 $as_echo "#define HAVE_PJSIP_INV_SESSION_REF 1" >>confdefs.h
 
 
+$as_echo "#define HAVE_PJSIP_AUTH_CLT_DEINIT 1" >>confdefs.h
+
+
 
 
 
@@ -11462,6 +11469,18 @@ PBX_PJSIP_INV_SESSION_REF=0
 
 
 
+
+PJSIP_AUTH_CLT_DEINIT_DESCRIP="pjsip_auth_clt_deinit support"
+PJSIP_AUTH_CLT_DEINIT_OPTION=pjsip
+PJSIP_AUTH_CLT_DEINIT_DIR=${PJPROJECT_DIR}
+
+PBX_PJSIP_AUTH_CLT_DEINIT=0
+
+
+
+
+
+
 fi
 
 
@@ -26423,6 +26442,110 @@ _ACEOF
 fi
 
 
+
+if test "x${PBX_PJSIP_AUTH_CLT_DEINIT}" != "x1" -a "${USE_PJSIP_AUTH_CLT_DEINIT}" != "no"; then
+   pbxlibdir=""
+   # if --with-PJSIP_AUTH_CLT_DEINIT=DIR has been specified, use it.
+   if test "x${PJSIP_AUTH_CLT_DEINIT_DIR}" != "x"; then
+      if test -d ${PJSIP_AUTH_CLT_DEINIT_DIR}/lib; then
+         pbxlibdir="-L${PJSIP_AUTH_CLT_DEINIT_DIR}/lib"
+      else
+         pbxlibdir="-L${PJSIP_AUTH_CLT_DEINIT_DIR}"
+      fi
+   fi
+   pbxfuncname="pjsip_auth_clt_deinit"
+   if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
+      AST_PJSIP_AUTH_CLT_DEINIT_FOUND=yes
+   else
+      ast_ext_lib_check_save_CFLAGS="${CFLAGS}"
+      CFLAGS="${CFLAGS} $PJPROJECT_CFLAGS"
+      as_ac_Lib=`$as_echo "ac_cv_lib_pjsip_${pbxfuncname}" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${pbxfuncname} in -lpjsip" >&5
+$as_echo_n "checking for ${pbxfuncname} in -lpjsip... " >&6; }
+if eval \${$as_ac_Lib+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIB $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$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 ${pbxfuncname} ();
+int
+main ()
+{
+return ${pbxfuncname} ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$as_ac_Lib=yes"
+else
+  eval "$as_ac_Lib=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+eval ac_res=\$$as_ac_Lib
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"; then :
+  AST_PJSIP_AUTH_CLT_DEINIT_FOUND=yes
+else
+  AST_PJSIP_AUTH_CLT_DEINIT_FOUND=no
+fi
+
+      CFLAGS="${ast_ext_lib_check_save_CFLAGS}"
+   fi
+
+   # now check for the header.
+   if test "${AST_PJSIP_AUTH_CLT_DEINIT_FOUND}" = "yes"; then
+      PJSIP_AUTH_CLT_DEINIT_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIB"
+      # if --with-PJSIP_AUTH_CLT_DEINIT=DIR has been specified, use it.
+      if test "x${PJSIP_AUTH_CLT_DEINIT_DIR}" != "x"; then
+         PJSIP_AUTH_CLT_DEINIT_INCLUDE="-I${PJSIP_AUTH_CLT_DEINIT_DIR}/include"
+      fi
+      PJSIP_AUTH_CLT_DEINIT_INCLUDE="${PJSIP_AUTH_CLT_DEINIT_INCLUDE} $PJPROJECT_CFLAGS"
+      if test "xpjsip.h" = "x" ; then	# no header, assume found
+         PJSIP_AUTH_CLT_DEINIT_HEADER_FOUND="1"
+      else				# check for the header
+         ast_ext_lib_check_saved_CPPFLAGS="${CPPFLAGS}"
+         CPPFLAGS="${CPPFLAGS} ${PJSIP_AUTH_CLT_DEINIT_INCLUDE}"
+         ac_fn_c_check_header_mongrel "$LINENO" "pjsip.h" "ac_cv_header_pjsip_h" "$ac_includes_default"
+if test "x$ac_cv_header_pjsip_h" = xyes; then :
+  PJSIP_AUTH_CLT_DEINIT_HEADER_FOUND=1
+else
+  PJSIP_AUTH_CLT_DEINIT_HEADER_FOUND=0
+fi
+
+
+         CPPFLAGS="${ast_ext_lib_check_saved_CPPFLAGS}"
+      fi
+      if test "x${PJSIP_AUTH_CLT_DEINIT_HEADER_FOUND}" = "x0" ; then
+         PJSIP_AUTH_CLT_DEINIT_LIB=""
+         PJSIP_AUTH_CLT_DEINIT_INCLUDE=""
+      else
+         if test "x${pbxfuncname}" = "x" ; then		# only checking headers -> no library
+            PJSIP_AUTH_CLT_DEINIT_LIB=""
+         fi
+         PBX_PJSIP_AUTH_CLT_DEINIT=1
+         cat >>confdefs.h <<_ACEOF
+#define HAVE_PJSIP_AUTH_CLT_DEINIT 1
+_ACEOF
+
+      fi
+   fi
+fi
+
+
    fi
 fi