+ event.[ch]

src/CMakeLists.txt

@@ -1,7 +1,7 @@
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 set(SOURCES "daemon.c" "strlcpy.c" "config.c" "buf.c" "log.c" "matches.c" "ipaddr.c"
-  "appconfig.c" "statefile.c" "source.c" "filter.c" "backend.c" "jail.c")
+  "appconfig.c" "statefile.c" "event.c" "source.c" "filter.c" "backend.c" "jail.c")
 
 if (WITH_CSOCKET)
   list(APPEND SOURCES "md5.c" "commands.c" "csocket.c")

src/event.c

@@ -0,0 +1,33 @@
+/* Copyright 2021 Alex 'AdUser' Z (ad_user@runbox.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include "common.h"
+
+static void (*handlers[4])(const char *) = { NULL, NULL, NULL, NULL };
+
+void
+f2b_event_send(const char *evt) {
+  for (short int i = 0; i < 3; i++) {
+    if (!handlers[i]) break; /* end of list */
+    handlers[i](evt);
+  }
+}
+
+bool
+f2b_event_handler_register(void (*h)(const char *)) {
+  for (short int i = 0; i < 3; i++) {
+    if (handlers[i] == NULL) {
+      handlers[i] = h;
+      return true;
+    }
+  }
+  return false;
+}
+
+void
+f2b_event_handler_flush() {
+  memset(handlers, 0x0, sizeof(handlers));
+}

src/event.h

@@ -0,0 +1,44 @@
+/* Copyright 2020-2021 Alex 'AdUser' Z (ad_user@runbox.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef F2B_EVENT_H_
+#define F2B_EVENT_H_
+
+/**
+ * @file
+ * This file contains event-related routines
+ */
+
+/**
+ * @def EVENT_MAX
+ * Maximum text length of event line
+ */
+#define EVENT_MAX 128
+
+/**
+ * @brief Send event to all registered handlers
+ * @param evt Constant string in specified format
+ */
+void
+f2b_event_send(const char *evt);
+
+/**
+ * @brief Adds event handler
+ * @param h Pointer to function
+ * @note For now you can register not more than three handlers.
+ * It will be called in order of registration
+ * @return true on success, false on error
+ */
+bool
+f2b_event_handler_register(void (*h)(const char *evt));
+
+/**
+ * @brief Clean event handlers list
+ */
+void
+f2b_event_handlers_flush();
+
+#endif /* F2B_EVENT_H_ */