feature: adding Kafka infrastructure

4 files changed, 276 insertions, 2 deletions

diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 5f6ff2e..247786b 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -1,6 +1,6 @@
-add_library(common src/session_table.cpp src/packet.cpp src/control_packet.cpp src/bfd.cpp src/utils.cpp src/vxlan.cpp src/log.cpp src/timestamp.cpp src/mpack.cpp)
+add_library(common src/session_table.cpp src/packet.cpp src/control_packet.cpp src/bfd.cpp src/utils.cpp src/vxlan.cpp src/log.cpp src/timestamp.cpp src/mpack.cpp src/kafka.cpp)
 target_link_libraries(common PUBLIC cjson)
-target_link_libraries(common PUBLIC MESA_handle_logger)
+target_link_libraries(common PUBLIC MESA_handle_logger rdkafka)
 
 target_include_directories(common PUBLIC ${CMAKE_CURRENT_LIST_DIR}/include)
 
diff --git a/common/include/kafka.h b/common/include/kafka.h
new file mode 100644
index 0000000..ffb9911
--- /dev/null
+++ b/common/include/kafka.h
@@ -0,0 +1,28 @@
+#ifndef _KAFKA_H
+#define _KAFKA_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+enum topic_idx
+{
+	TOPIC_RULE_HITS,
+
+	// add more topic here
+
+	MAX_TOPIC_NUM,
+};
+
+struct kafka *kafka_create(const char *profile);
+void kafka_destroy(struct kafka *handle);
+// return  0: if success
+// return -1: if failed
+int kafka_send(struct kafka *handle, enum topic_idx idx, const char *data, int len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/common/include/utils.h b/common/include/utils.h
index 713c254..8319ed1 100644
--- a/common/include/utils.h
+++ b/common/include/utils.h
@@ -18,6 +18,7 @@ extern "C"
 #define LOG_TAG_UTILS         "UTILS"
 #define LOG_TAG_HEALTH_CHECK  "HEALTH_CHECK"
 #define LOG_TAG_TIMESTAMP     "TIMESTAMP"
+#define LOG_TAG_KAFKA         "KAFKA"
 
 #define	ATOMIC_INC(x)    __atomic_fetch_add(x, 1, __ATOMIC_RELAXED)
 #define	ATOMIC_DEC(x) 	 __atomic_fetch_sub(x, 1, __ATOMIC_RELAXED)
diff --git a/common/src/kafka.cpp b/common/src/kafka.cpp
new file mode 100644
index 0000000..2a06c92
--- /dev/null
+++ b/common/src/kafka.cpp
@@ -0,0 +1,245 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "log.h"
+#include "utils.h"
+#include "kafka.h"
+#include <MESA/MESA_prof_load.h>
+#include <librdkafka/rdkafka.h>
+
+#define MAX_SYMBOL_LEN 128
+
+#define KAFKA_LOG_ERROR(fmt, ...) LOG_ERROR("%s: " fmt, LOG_TAG_KAFKA, ##__VA_ARGS__)
+#define KAFKA_LOG_DEBUG(fmt, ...) LOG_DEBUG("%s: " fmt, LOG_TAG_KAFKA, ##__VA_ARGS__)
+
+struct config
+{
+    char brokerlist[MAX_SYMBOL_LEN];
+    char sasl_username[MAX_SYMBOL_LEN];
+    char sasl_passwd[MAX_SYMBOL_LEN];
+    char topic_name[MAX_TOPIC_NUM][MAX_SYMBOL_LEN];
+};
+
+struct per_producer_per_topic
+{
+    rd_kafka_t *producer;
+    rd_kafka_topic_t *topic;
+};
+
+struct kafka
+{
+    struct config cfg;
+    struct per_producer_per_topic *pppt[MAX_TOPIC_NUM];
+};
+
+/******************************************************************************
+ * Private API
+ ******************************************************************************/
+
+static void per_producer_per_topic_free(struct per_producer_per_topic *pppt)
+{
+    if (pppt)
+    {
+        if (pppt->topic)
+        {
+            rd_kafka_topic_destroy(pppt->topic);
+            pppt->topic = NULL;
+        }
+
+        if (pppt->producer)
+        {
+            rd_kafka_destroy(pppt->producer);
+            pppt->producer = NULL;
+        }
+
+        free(pppt);
+        pppt = NULL;
+    }
+}
+
+static struct per_producer_per_topic *per_producer_per_topic_new(const char *brokerlist, const char *sasl_username, const char *sasl_passwd, const char *topic_name)
+{
+    char err_str[1024] = {0};
+    struct per_producer_per_topic *pppt = (struct per_producer_per_topic *)calloc(1, sizeof(struct per_producer_per_topic));
+    if (!pppt)
+    {
+        return NULL;
+    }
+
+    rd_kafka_conf_t *conf = rd_kafka_conf_new();
+    if (!conf)
+    {
+        KAFKA_LOG_ERROR("failed to create kafka conf");
+        goto error_out;
+    }
+    if (rd_kafka_conf_set(conf, "queue.buffering.max.messages", "1000000", err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+    {
+        KAFKA_LOG_ERROR("failed to set kafka queue.buffering.max.messages, %s", err_str);
+        goto error_out;
+    }
+    if (rd_kafka_conf_set(conf, "topic.metadata.refresh.interval.ms", "600000", err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+    {
+        KAFKA_LOG_ERROR("failed to set kafka topic.metadata.refresh.interval.ms, %s", err_str);
+        goto error_out;
+    }
+    if (rd_kafka_conf_set(conf, "client.id", topic_name, err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+    {
+        KAFKA_LOG_ERROR("failed to set kafka client.id, %s", err_str);
+        goto error_out;
+    }
+    if (strlen(sasl_username) > 0 && strlen(sasl_passwd) > 0)
+    {
+        if (rd_kafka_conf_set(conf, "security.protocol", "sasl_plaintext", err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+        {
+            KAFKA_LOG_ERROR("failed to set kafka security.protocol, %s", err_str);
+            goto error_out;
+        }
+        if (rd_kafka_conf_set(conf, "sasl.mechanisms", "PLAIN", err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+        {
+            KAFKA_LOG_ERROR("failed to set kafka sasl.mechanisms, %s", err_str);
+            goto error_out;
+        }
+        if (rd_kafka_conf_set(conf, "sasl.username", sasl_username, err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+        {
+            KAFKA_LOG_ERROR("failed to set kafka sasl.username, %s", err_str);
+            goto error_out;
+        }
+        if (rd_kafka_conf_set(conf, "sasl.password", sasl_passwd, err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+        {
+            KAFKA_LOG_ERROR("failed to set kafka sasl.password, %s", err_str);
+            goto error_out;
+        }
+    }
+    else
+    {
+        if (rd_kafka_conf_set(conf, "security.protocol", "plaintext", err_str, sizeof(err_str)) != RD_KAFKA_CONF_OK)
+        {
+            KAFKA_LOG_ERROR("failed to set kafka security.protocol, %s", err_str);
+            goto error_out;
+        }
+    }
+
+    // The conf object is freed by this function and must not be used or destroyed by the application sub-sequently.
+    pppt->producer = rd_kafka_new(RD_KAFKA_PRODUCER, conf, err_str, sizeof(err_str));
+    conf = NULL;
+    if (pppt->producer == NULL)
+    {
+        KAFKA_LOG_ERROR("failed to create kafka producer, %s", err_str);
+        goto error_out;
+    }
+
+    if (rd_kafka_brokers_add(pppt->producer, brokerlist) == 0)
+    {
+        KAFKA_LOG_ERROR("failed to add kafka brokers");
+        goto error_out;
+    }
+
+    pppt->topic = rd_kafka_topic_new(pppt->producer, topic_name, NULL);
+    if (pppt->topic == NULL)
+    {
+        KAFKA_LOG_ERROR("failed to create kafka topic: %s", topic_name);
+        goto error_out;
+    }
+
+    return pppt;
+
+error_out:
+    if (conf)
+    {
+        rd_kafka_conf_destroy(conf);
+    }
+
+    per_producer_per_topic_free(pppt);
+    return NULL;
+}
+
+/******************************************************************************
+ * Public API -- Kafka
+ ******************************************************************************/
+
+// due to limit by client.id, need per producer per topic
+struct kafka *kafka_create(const char *profile)
+{
+    struct kafka *handle = (struct kafka *)calloc(1, sizeof(struct kafka));
+    if (!handle)
+    {
+        return NULL;
+    }
+
+    MESA_load_profile_string_def(profile, "kafka", "brokerlist", handle->cfg.brokerlist, sizeof(handle->cfg.brokerlist), "");
+    MESA_load_profile_string_def(profile, "kafka", "sasl_username", handle->cfg.sasl_username, sizeof(handle->cfg.sasl_username), "");
+    MESA_load_profile_string_def(profile, "kafka", "sasl_passwd", handle->cfg.sasl_passwd, sizeof(handle->cfg.sasl_passwd), "");
+    MESA_load_profile_string_def(profile, "kafka", "topic_name", handle->cfg.topic_name[TOPIC_RULE_HITS], sizeof(handle->cfg.topic_name[TOPIC_RULE_HITS]), "");
+
+    if (strlen(handle->cfg.brokerlist) == 0)
+    {
+        KAFKA_LOG_ERROR("brokerlist is empty");
+        goto error_out;
+    }
+
+    for (int i = 0; i < MAX_TOPIC_NUM; i++)
+    {
+        if (strlen(handle->cfg.topic_name[i]) == 0)
+        {
+            KAFKA_LOG_ERROR("topic_name[%d] is empty", i);
+            goto error_out;
+        }
+    }
+
+    for (int i = 0; i < MAX_TOPIC_NUM; i++)
+    {
+        handle->pppt[i] = per_producer_per_topic_new(handle->cfg.brokerlist, handle->cfg.sasl_username, handle->cfg.sasl_passwd, handle->cfg.topic_name[i]);
+        if (!handle->pppt[i])
+        {
+            goto error_out;
+        }
+    }
+
+    return handle;
+
+error_out:
+    kafka_destroy(handle);
+    return NULL;
+}
+
+void kafka_destroy(struct kafka *handle)
+{
+    if (handle)
+    {
+        for (int i = 0; i < MAX_TOPIC_NUM; i++)
+        {
+            per_producer_per_topic_free(handle->pppt[i]);
+            handle->pppt[i] = NULL;
+        }
+
+        free(handle);
+        handle = NULL;
+    }
+}
+
+int kafka_send(struct kafka *handle, enum topic_idx idx, const void *data, int len)
+{
+    if (idx < 0 || idx >= MAX_TOPIC_NUM)
+    {
+        KAFKA_LOG_ERROR("invalid topic index: %d", idx);
+        return -1;
+    }
+
+    if (handle->pppt[idx])
+    {
+        if (rd_kafka_produce(handle->pppt[idx]->topic, RD_KAFKA_PARTITION_UA, RD_KAFKA_MSG_F_COPY, (void *)data, len, NULL, 0, NULL) == -1)
+        {
+            KAFKA_LOG_ERROR("failed to produce message with topic [%d], %s", idx, rd_kafka_err2str(rd_kafka_last_error()));
+            return -1;
+        }
+        else
+        {
+            return 0;
+        }
+    }
+    else
+    {
+        KAFKA_LOG_ERROR("topic %d not initialized", idx);
+        return -1;
+    }
+}
\ No newline at end of file