oops, missed a few files.

bin/named/control.c

+#include <config.h>
+
+#include <string.h>
+
+#include <isc/app.h>
+#include <isc/event.h>
+#include <isc/mem.h>
+#include <isc/util.h>
+
+#include <isccc/alist.h>
+#include <isccc/cc.h>
+#include <isccc/result.h>
+
+#include <named/control.h>
+#include <named/log.h>
+#include <named/server.h>
+
+static isc_boolean_t
+command_compare(const char *text, const char *command) {
+	if (strncasecmp(text, command, strlen(command)) == 0 &&
+	    (text[strlen(command)] == 0 || text[strlen(command)] == ' '))
+		return (ISC_TRUE);
+	return (ISC_FALSE);
+}
+
+/*
+ * This is the function that is called to process an incoming command when a
+ * message is received.  It is called once for each name/value pair in the
+ * message's object value list or something.
+ */
+isc_result_t
+ns_control_docommand(isccc_sexpr_t *message) {
+	isccc_sexpr_t *data;
+	char *command;
+	isc_result_t result;
+
+	data = isccc_alist_lookup(message, "_data");
+	if (data == NULL) {
+		/*
+		 * No data section.
+		 */
+		return (ISC_R_FAILURE);
+	}
+
+	result = isccc_cc_lookupstring(data, "type", &command);
+	if (result != ISC_R_SUCCESS) {
+		/*
+		 * We have no idea what this is.
+		 */
+		return (result);
+	}
+
+	isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
+		      NS_LOGMODULE_CONTROL, ISC_LOG_DEBUG(1),
+		      "received control channel command '%s'",
+		      command);
+
+	/*
+	 * Compare the 'command' parameter against all known control commands.
+	 */
+	if (command_compare(command, NS_COMMAND_RELOAD)) {
+		result = ns_server_reloadcommand(ns_g_server, command);
+	} else if (command_compare(command, NS_COMMAND_REFRESH)) {
+		result = ns_server_refreshcommand(ns_g_server, command);
+	} else if (command_compare(command, NS_COMMAND_HALT)) {
+		ns_server_flushonshutdown(ns_g_server, ISC_FALSE);
+		isc_app_shutdown();
+		result = ISC_R_SUCCESS;
+	} else if (command_compare(command, NS_COMMAND_STOP)) {
+		ns_server_flushonshutdown(ns_g_server, ISC_TRUE);
+		isc_app_shutdown();
+		result = ISC_R_SUCCESS;
+	} else if (command_compare(command, NS_COMMAND_RELOADCONFIG) ||
+		   command_compare(command, NS_COMMAND_RELOADZONES)) {
+		isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
+			      NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
+			      "unimplemented channel command '%s'",
+			      command);
+		result = ISC_R_NOTIMPLEMENTED;
+	} else if (command_compare(command, NS_COMMAND_DUMPSTATS)) {
+		result = ns_server_dumpstats(ns_g_server);
+	} else if (command_compare(command, NS_COMMAND_QUERYLOG)) {
+		result = ns_server_togglequerylog(ns_g_server);
+	} else if (command_compare(command, NS_COMMAND_DUMPDB)) {
+		ns_server_dumpdb(ns_g_server);
+		result = ISC_R_SUCCESS;
+	} else if (command_compare(command, NS_COMMAND_TRACE)) {
+		result = ns_server_setdebuglevel(ns_g_server, command);
+	} else if (command_compare(command, NS_COMMAND_NOTRACE)) {
+		ns_g_debuglevel = 0;
+		isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
+		result = ISC_R_SUCCESS;
+	} else {
+		isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
+			      NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
+			      "unknown control channel command '%s'",
+			      command);
+		result = ISC_R_NOTIMPLEMENTED;
+	}
+
+	return (result);
+}

bin/named/include/named/control.h

+#ifndef NAMED_CONTROL_H
+#define NAMED_CONTROL_H 1
+
+#include <isccc/types.h>
+
+#include <named/aclconf.h>
+
+#define NS_CONTROL_PORT			953
+
+#define NS_COMMAND_STOP		"stop"
+#define NS_COMMAND_HALT		"halt"
+#define NS_COMMAND_RELOAD	"reload"
+#define NS_COMMAND_RELOADCONFIG	"reload-config"
+#define NS_COMMAND_RELOADZONES	"reload-zones"
+#define NS_COMMAND_REFRESH	"refresh"
+#define NS_COMMAND_DUMPSTATS	"stats"
+#define NS_COMMAND_QUERYLOG	"querylog"
+#define NS_COMMAND_DUMPDB	"dumpdb"
+#define NS_COMMAND_TRACE	"trace"
+#define NS_COMMAND_NOTRACE	"notrace"
+
+isc_result_t
+ns_control_init(void);
+
+isc_result_t
+ns_control_configure(isc_mem_t *mctx, cfg_obj_t *config,
+		     ns_aclconfctx_t *aclconfctx);
+
+void
+ns_control_shutdown(isc_boolean_t exiting);
+
+isc_result_t
+ns_control_docommand(isccc_sexpr_t *message);
+
+#endif /* NAMED_CONTROL_H */