From d82c515f44f81f2764750b0578f3b6169aad48fa Mon Sep 17 00:00:00 2001
From: Alex 'AdUser' Z <ad_user@runbox.com>
Date: Mon, 29 Mar 2021 16:13:14 +1000
Subject: [PATCH] + event.[ch]

---
 src/CMakeLists.txt |  2 +-
 src/event.c        | 33 +++++++++++++++++++++++++++++++++
 src/event.h        | 44 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+), 1 deletion(-)
 create mode 100644 src/event.c
 create mode 100644 src/event.h

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6883a6b..2dbf8d6 100644
--- a/src/CMakeLists.txt
+++ b/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")
diff --git a/src/event.c b/src/event.c
new file mode 100644
index 0000000..1cb164e
--- /dev/null
+++ b/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));
+}
diff --git a/src/event.h b/src/event.h
new file mode 100644
index 0000000..af91c3d
--- /dev/null
+++ b/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_ */