plugin/Manager: Fix MetaHookPre and MetaHookPost using HOOK_CALL_FUNCTION

testing/btest/plugins/meta-hook-plugin/src/Plugin.cc

@@ -0,0 +1,83 @@
+
+#include "Plugin.h"
+
+#include <zeek/Desc.h>
+#include <zeek/Event.h>
+#include <zeek/Func.h>
+#include <zeek/threading/Formatter.h>
+#include <cstdlib>
+
+namespace btest::plugin::Demo_Meta_Hooks {
+Plugin plugin;
+}
+
+using namespace btest::plugin::Demo_Meta_Hooks;
+
+zeek::plugin::Configuration Plugin::Configure() {
+    zeek::plugin::Configuration config;
+    config.name = "Demo::Meta_Hooks";
+    config.description = "Test if the meta hooks are working";
+    config.version.major = 1;
+    config.version.minor = 0;
+    config.version.patch = 0;
+
+    // This plugin enables HookQueueEvent() and optionally the pre and post
+    // meta hooks controlled by environment variables for easier testing.
+
+    EnableHook(zeek::plugin::HOOK_QUEUE_EVENT);
+
+    if ( getenv("TEST_META_HOOK_PRE") )
+        EnableHook(zeek::plugin::META_HOOK_PRE);
+
+    if ( getenv("TEST_META_HOOK_POST") )
+        EnableHook(zeek::plugin::META_HOOK_POST);
+
+    return config;
+}
+
+static void describe_hook_args(const zeek::plugin::HookArgumentList& args, zeek::ODesc* d) {
+    bool first = true;
+
+    for ( const auto& arg : args ) {
+        if ( ! first )
+            d->Add(", ");
+
+        arg.Describe(d);
+        first = false;
+    }
+}
+
+
+bool Plugin::HookQueueEvent(zeek::Event* e) {
+    fprintf(stdout, "%.6f %-15s %s()\n", zeek::run_state::network_time, "  HookQueueEvent", e->Handler()->Name());
+    return false;
+}
+
+void Plugin::MetaHookPre(zeek::plugin::HookType hook, const zeek::plugin::HookArgumentList& args) {
+    // The spicy integration enables HOOK_LOAD_FILE and this plugin receives
+    // meta hooks also for that :-/
+    if ( hook != zeek::plugin::HOOK_QUEUE_EVENT )
+        return;
+
+    zeek::ODesc d;
+    d.SetShort();
+    describe_hook_args(args, &d);
+    fprintf(stdout, "%.6f %-15s %s(%s)\n", zeek::run_state::network_time, "  MetaHookPre", hook_name(hook),
+            d.Description());
+}
+
+void Plugin::MetaHookPost(zeek::plugin::HookType hook, const zeek::plugin::HookArgumentList& args,
+                          zeek::plugin::HookArgument result) {
+    // The spicy integration enables HOOK_LOAD_FILE and this plugin receives
+    // meta hooks also for that :-/
+    if ( hook != zeek::plugin::HOOK_QUEUE_EVENT )
+        return;
+
+    zeek::ODesc d1;
+    zeek::ODesc d2;
+    describe_hook_args(args, &d1);
+    result.Describe(&d2);
+
+    fprintf(stdout, "%.6f %-15s %s(%s) -> %s\n", zeek::run_state::network_time, "  MetaHookPost", hook_name(hook),
+            d1.Description(), d2.Description());
+}

testing/btest/plugins/meta-hook-plugin/src/Plugin.h

@@ -0,0 +1,21 @@
+
+#pragma once
+
+#include <zeek/plugin/Plugin.h>
+
+namespace btest::plugin::Demo_Meta_Hooks {
+
+class Plugin : public zeek::plugin::Plugin {
+protected:
+    bool HookQueueEvent(zeek::Event* e) override;
+    void MetaHookPre(zeek::plugin::HookType hook, const zeek::plugin::HookArgumentList& args) override;
+    void MetaHookPost(zeek::plugin::HookType hook, const zeek::plugin::HookArgumentList& args,
+                      zeek::plugin::HookArgument result) override;
+
+    // Overridden from plugin::Plugin.
+    zeek::plugin::Configuration Configure() override;
+};
+
+extern Plugin plugin;
+
+} // namespace btest::plugin::Demo_Meta_Hooks