1 files changed, 407 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_event_test/event_test.c b/src/fluent-bit/plugins/in_event_test/event_test.c
new file mode 100644
index 000000000..557017fe2
--- /dev/null
+++ b/src/fluent-bit/plugins/in_event_test/event_test.c
@@ -0,0 +1,407 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2022 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include <fluent-bit/flb_input_plugin.h>
+#include <fluent-bit/flb_config.h>
+#include <fluent-bit/flb_config_map.h>
+#include <fluent-bit/flb_error.h>
+#include <fluent-bit/flb_pipe.h>
+#include <fluent-bit/flb_time.h>
+#include <fluent-bit/flb_pack.h>
+#include <fluent-bit/flb_upstream.h>
+#include <fluent-bit/flb_time_utils.h>
+
+#define STATUS_OK        1
+#define STATUS_ERROR     0
+#define STATUS_PENDING  -1
+#define CALLBACK_TIME    2 /* 2 seconds */
+
+#define SERVER_PORT      "9092"
+#define SERVER_IFACE     "0.0.0.0"
+
+struct unit_test {
+    int id;
+    int coll_id;
+    int status;
+    char *desc;
+};
+
+struct unit_test tests[] = {
+    {0, 0, STATUS_PENDING, "collector time"},
+    {1, 0, STATUS_PENDING, "collector fd_event"},
+    {2, 0, STATUS_PENDING, "collector fd_server | socket"},
+    {3, 0, STATUS_PENDING, "plugin paused from engine"},
+    {4, 0, STATUS_PENDING, "plugin resumed from engine"},
+};
+
+#define UNIT_TESTS_SIZE  (sizeof(tests) / sizeof(struct unit_test))
+
+struct event_test {
+    flb_pipefd_t pipe[2];
+    int server_fd;
+    int client_coll_id;
+    struct flb_upstream *upstream;
+    struct unit_test *tests;
+    struct flb_input_instance *ins;
+};
+
+static void set_unit_test_status(struct event_test *ctx, int id, int status)
+{
+    struct unit_test *ut;
+
+    ut = &ctx->tests[id];
+    ut->status = status;
+}
+
+static int config_destroy(struct event_test *ctx)
+{
+    if (!ctx) {
+        return 0;
+    }
+
+    if (ctx->tests) {
+        flb_free(ctx->tests);
+    }
+
+    if (ctx->pipe[0] > 0) {
+        flb_socket_close(ctx->pipe[0]);
+    }
+    if (ctx->pipe[1] > 0) {
+        flb_socket_close(ctx->pipe[1]);
+    }
+    if (ctx->server_fd > 0) {
+        flb_socket_close(ctx->server_fd);
+    }
+
+    if (ctx->upstream) {
+        flb_upstream_destroy(ctx->upstream);
+    }
+
+    flb_free(ctx);
+    return 0;
+}
+
+static int cb_collector_time(struct flb_input_instance *ins,
+                            struct flb_config *config, void *in_context)
+{
+    int diff;
+    int ret;
+    uint64_t val;
+    time_t now;
+    struct unit_test *ut;
+    struct event_test *ctx = (struct event_test *) in_context;
+
+    now = time(NULL);
+    diff = now - config->init_time;
+    /* For macOS, we sometimes get the +1 longer time elapse.
+     * To handle this, we simply add +1 as a delta for checking interval. */
+    if (diff > (CALLBACK_TIME + 1)) {
+        flb_plg_error(ins, "cb_collector_time difference failed: %i seconds", diff);
+        set_unit_test_status(ctx, 0, STATUS_ERROR);
+        flb_engine_exit(config);
+    }
+
+    /* disable the collector */
+    ut = &ctx->tests[0];
+    flb_input_collector_pause(ut->coll_id, ins);
+
+    /*
+     * before to return, trigger test 1 (collector_fd_event) by writing a byte
+     * to our local pipe.
+     */
+    val = 1;
+    ret = write(ctx->pipe[1], &val, sizeof(val));
+    if (ret == -1) {
+        flb_errno();
+        set_unit_test_status(ctx, 0, STATUS_ERROR);
+        flb_engine_exit(config);
+    }
+
+    set_unit_test_status(ctx, 0, STATUS_OK);
+    flb_plg_info(ins, "[OK] collector_time");
+    FLB_INPUT_RETURN(0);
+}
+
+static int cb_collector_fd(struct flb_input_instance *ins,
+                           struct flb_config *config, void *in_context)
+{
+    uint64_t val = 0;
+    size_t bytes;
+    struct unit_test *ut;
+    struct event_test *ctx = (struct event_test *) in_context;
+
+    bytes = read(ctx->pipe[0], &val, sizeof(val));
+    if (bytes <= 0) {
+        flb_errno();
+        set_unit_test_status(ctx, 1, STATUS_ERROR);
+        flb_engine_exit(config);
+    }
+    else {
+        flb_plg_info(ins, "[OK] collector_fd");
+    }
+
+    /* disable the collector */
+    ut = &ctx->tests[1];
+    flb_input_collector_pause(ut->coll_id, ins);
+    set_unit_test_status(ctx, 1, STATUS_OK);
+
+    FLB_INPUT_RETURN(0);
+}
+
+static int cb_collector_server_socket(struct flb_input_instance *ins,
+                                      struct flb_config *config, void *in_context)
+{
+    int fd;
+    struct unit_test *ut;
+    struct event_test *ctx = in_context;
+
+    /* Accept the new connection */
+    fd = flb_net_accept(ctx->server_fd);
+    if (fd == -1) {
+        flb_plg_error(ins, "could not accept new connection");
+        return -1;
+    }
+
+    /* sleep co-routine for 500ms */
+    flb_time_sleep(500);
+    flb_socket_close(fd);
+
+    ut = &ctx->tests[2];
+    flb_input_collector_pause(ut->coll_id, ins);
+    set_unit_test_status(ctx, 2, STATUS_OK);
+
+    flb_plg_info(ins, "[OK] collector_server_socket");
+
+    /* tell the engine to deliver a pause request */
+    flb_plg_info(ins, "test pause/resume in 5 seconds...");
+    flb_input_test_pause_resume(ins, 5);
+
+    /* return */
+    FLB_INPUT_RETURN(0);
+}
+
+static int cb_collector_server_client(struct flb_input_instance *ins,
+                                      struct flb_config *config, void *in_context)
+{
+    struct flb_connection *u_conn;
+    struct event_test *ctx = (struct event_test *) in_context;
+
+    /* get the upstream connection (localhost) */
+    u_conn = flb_upstream_conn_get(ctx->upstream);
+    if (!u_conn) {
+        flb_plg_error(ins, "could not connect to socket server");
+        return -1;
+    }
+
+    flb_time_sleep(200);
+    flb_upstream_conn_release(u_conn);
+
+    /* disable this collector */
+    flb_input_collector_pause(ctx->client_coll_id, ins);
+    FLB_INPUT_RETURN(0);
+}
+
+static struct event_test *config_create(struct flb_input_instance *ins)
+{
+    size_t size;
+    struct event_test *ctx;
+
+    /* Allocate space for the configuration */
+    ctx = flb_calloc(1, sizeof(struct event_test));
+    if (!ctx) {
+        flb_errno();
+        return NULL;
+    }
+    ctx->ins = ins;
+
+    size = sizeof(struct unit_test) * UNIT_TESTS_SIZE;
+    ctx->tests = flb_malloc(size);
+    if (!ctx->tests) {
+        flb_errno();
+        flb_free(ctx);
+        return NULL;
+    }
+    memcpy(ctx->tests, &tests, size);
+    return ctx;
+}
+
+/* Initialize plugin */
+static int cb_event_test_init(struct flb_input_instance *ins,
+                              struct flb_config *config, void *data)
+{
+    int fd;
+    int ret;
+    struct unit_test *ut;
+    struct event_test *ctx = NULL;
+    struct flb_upstream *upstream;
+
+    /* Allocate space for the configuration */
+    ctx = config_create(ins);
+    if (!ctx) {
+        return -1;
+    }
+    flb_input_set_context(ins, ctx);
+
+    /* unit test 0: collector_time */
+    ret = flb_input_set_collector_time(ins, cb_collector_time,
+                                       CALLBACK_TIME, 0, config);
+    if (ret < 0) {
+        config_destroy(ctx);
+        return -1;
+    }
+    ut = &ctx->tests[0];
+    ut->coll_id = ret;
+
+    /* unit test 1: collector_fd_event */
+    ret = flb_pipe_create(ctx->pipe);
+    if (ret == -1) {
+        flb_errno();
+        config_destroy(ctx);
+        return -1;
+    }
+    ret = flb_input_set_collector_event(ins,
+                                        cb_collector_fd,
+                                        ctx->pipe[0],
+                                        config);
+    if (ret < 0) {
+        config_destroy(ctx);
+        return -1;
+    }
+    ut = &ctx->tests[1];
+    ut->coll_id = ret;
+
+    /* unit test 2: collector_socket */
+    fd = flb_net_server(SERVER_PORT, SERVER_IFACE);
+    if (fd < 0) {
+        flb_errno();
+        config_destroy(ctx);
+        return -1;
+    }
+    flb_net_socket_nonblocking(fd);
+        ctx->server_fd = fd;
+
+    /* socket server */
+    ret = flb_input_set_collector_socket(ins,
+                                         cb_collector_server_socket,
+                                         ctx->server_fd,
+                                         config);
+    if (ret == -1) {
+        config_destroy(ctx);
+        return -1;
+    }
+    ut = &ctx->tests[2];
+    ut->coll_id = ret;
+
+    /* socket client: connect to socket server to trigger the event */
+    ret = flb_input_set_collector_time(ins, cb_collector_server_client,
+                                       CALLBACK_TIME * 2, 0, config);
+    if (ret < 0) {
+        config_destroy(ctx);
+        return -1;
+    }
+    ctx->client_coll_id = ret;
+
+    /* upstream context for socket client */
+    upstream = flb_upstream_create(config, "127.0.0.1", atoi(SERVER_PORT),
+                                   FLB_IO_TCP, NULL);
+    if (!upstream) {
+        config_destroy(ctx);
+        return -1;
+    }
+    ctx->upstream = upstream;
+    flb_input_upstream_set(ctx->upstream, ins);
+
+    return 0;
+}
+
+static int cb_event_test_pre_run(struct flb_input_instance *ins,
+                                 struct flb_config *config, void *in_context)
+{
+    flb_plg_info(ins, "pre run OK");
+    return -1;
+}
+
+static void cb_event_test_pause(void *data, struct flb_config *config)
+{
+    struct event_test *ctx = data;
+
+    set_unit_test_status(ctx, 3, STATUS_OK);
+    flb_plg_info(ctx->ins, "[OK] engine has paused the plugin");
+}
+
+static void cb_event_test_resume(void *data, struct flb_config *config)
+{
+    struct event_test *ctx = data;
+
+    set_unit_test_status(ctx, 4, STATUS_OK);
+    flb_plg_info(ctx->ins, "[OK] engine has resumed the plugin");
+
+    flb_engine_exit(config);
+}
+
+static int in_event_test_exit(void *data, struct flb_config *config)
+{
+    int i;
+    int failed = FLB_FALSE;
+    struct event_test *ctx = data;
+    struct unit_test *ut;
+    (void) *config;
+
+    /* check tests */
+    for (i = 0; i < UNIT_TESTS_SIZE; i++) {
+        ut = &ctx->tests[i];
+        if (ut->status != STATUS_OK) {
+            flb_plg_error(ctx->ins, "unit test #%i '%s' failed",
+                          i, ut->desc);
+            failed = FLB_TRUE;
+        }
+        else {
+            flb_plg_info(ctx->ins, "unit test #%i '%s' succeeded",
+                         i, ut->desc);
+        }
+    }
+
+    /* if one test failed, perform an abrupt exit with proper error */
+    if (failed) {
+        exit(EXIT_FAILURE);
+    }
+
+    config_destroy(ctx);
+    return 0;
+}
+
+/* Configuration properties map */
+static struct flb_config_map config_map[] = {
+   /* EOF */
+   {0}
+};
+
+struct flb_input_plugin in_event_test_plugin = {
+    .name         = "event_test",
+    .description  = "Event tests for input plugins",
+    .cb_init      = cb_event_test_init,
+    .cb_pre_run   = cb_event_test_pre_run,
+    .cb_collect   = NULL,
+    .cb_flush_buf = NULL,
+    .cb_pause     = cb_event_test_pause,
+    .cb_resume    = cb_event_test_resume,
+    .cb_exit      = in_event_test_exit,
+    .config_map   = config_map,
+    .flags        = FLB_INPUT_CORO | FLB_INPUT_THREADED
+};