gateway manager implemented

inc/gw_stat_linked_list.h

+#ifndef GW_STAT_LINKED_LIST_H
+#define GW_STAT_LINKED_LIST_H
+
+#include <stdint.h>
+
+void gw_stat_linked_list_init(void);
+
+uint8_t gw_stat_linked_list_add(const char *app_key, const uint8_t dev_id);
+
+void gw_stat_linked_list_flush(char *store, uint8_t file);
+
+void gw_stat_linked_list_destroy(void);
+
+#endif // GW_STAT_LINKED_LIST_H

src/gateway.c

@@ -21,6 +21,7 @@
 #include "task_queue.h"
 #include "json.h"
 #include "aes.h"
+#include "gw_stat_linked_list.h"
 
 #define NTHREAD_MAX			10
 
@@ -74,6 +75,10 @@ typedef struct {
 	uint8_t packet_length;
 } gcom_ch_request_t;
 
+typedef struct {
+	uint64_t errors_count;
+} gw_stat_t;
+
 static const char * gw_conf_file = "gateway.conf";
 static const char * db_conf_file = "db.conf";
 static void process_gw_conf(json_value* value, gw_conf_t *gw_conf);
@@ -109,8 +114,11 @@ void ctrc_handler (int sig);
 static volatile uint8_t working = 1;
 
 pthread_mutex_t mutex;
+pthread_mutex_t gw_stat_mutex;
 PGconn *conn;
 
+gw_stat_t gw_stat;
+
 int main (int argc, char **argv) {
 	gw_conf_t *gw_conf = (gw_conf_t *)malloc(sizeof(gw_conf_t));
 	db_conf_t *db_conf = (db_conf_t *)malloc(sizeof(db_conf_t));
@@ -119,6 +127,8 @@ int main (int argc, char **argv) {
 	task_queue_t *tq;
 	pthread_t gw_mngr;
 	sigset_t sigset;
+	
+	gw_stat.errors_count = 0;
 
 	sigemptyset(&sigset);
 	/* block SIGALRM for gateway manager thread */
@@ -198,9 +208,12 @@ int main (int argc, char **argv) {
 	}
 
 	pthread_mutex_init(&mutex, NULL);
+	pthread_mutex_init(&gw_stat_mutex, NULL);
 
 	gateway_protocol_set_checkup_callback(gateway_protocol_checkup_callback);
-	
+
+	gw_stat_linked_list_init();
+
 	while (working) {
 		gcom_ch_request_t *req = (gcom_ch_request_t *)malloc(sizeof(gcom_ch_request_t));
 		memset(req, 0x0, sizeof(gcom_ch_request_t));
@@ -274,6 +287,10 @@ void process_packet(void *request) {
 			paramslen[0] = sensor_data.data_length;
 			paramsfor[0] = 1; // format - binary
 
+			pthread_mutex_lock(&gw_stat_mutex);
+			gw_stat_linked_list_add((char *)req->gch.gwp_conf.app_key, req->gch.gwp_conf.dev_id);
+			pthread_mutex_unlock(&gw_stat_mutex);
+
 			pthread_mutex_lock(&mutex);
 			res = PQexecParams(conn, db_query, 1, NULL, params, paramslen, paramsfor, 0);
 			pthread_mutex_unlock(&mutex);
@@ -307,6 +324,7 @@ void process_packet(void *request) {
 				send_gcom_ch(&(req->gch), req->packet, req->packet_length);
 			} else {
 				fprintf(stderr, "database error : %s\n", PQerrorMessage(conn));
+				gw_stat.errors_count++;
 			}
 			PQclear(res);
 		} else if (req->packet_type == GATEWAY_PROTOCOL_PACKET_TYPE_PEND_REQ) {
@@ -388,6 +406,7 @@ void process_packet(void *request) {
 					if (PQresultStatus(res) == PGRES_COMMAND_OK) {
 						printf("pend_msgs updated\n");
 					} else {
+						gw_stat.errors_count++;
 						fprintf(stderr, "database error : %s\n", PQerrorMessage(conn));
 					}
 				}
@@ -402,9 +421,11 @@ void process_packet(void *request) {
 			send_gcom_ch(&(req->gch), req->packet, req->packet_length);
 				
 			fprintf(stderr, "packet type error : %02X\n", req->packet_type);
+			gw_stat.errors_count++;
 		}
 	} else {
 		fprintf(stderr, "payload decode error\n");
+		gw_stat.errors_count++;
 	}
 	
 	free(req);
@@ -450,18 +471,26 @@ uint8_t gateway_auth(const gw_conf_t *gw_conf, const char *db_conf_file_path) {
 	return 1;
 }
 
-void * gateway_mngr(void *gw_conf) {
+#define GW_MNGR_BUF_LEN		1024
+#define GW_MNGR_QBUF_LEN	1136
+void * gateway_mngr(void *gw_cnf) {
 	struct itimerval tval;
-	uint32_t period = ((gw_conf_t *)gw_conf)->telemetry_send_period;
+	gw_conf_t *gw_conf = (gw_conf_t *) gw_cnf;
 	sigset_t alarm_msk;
 	int sig;
+	struct timeval tv;
+	char buf[GW_MNGR_BUF_LEN];
+	char qbuf[GW_MNGR_QBUF_LEN];
+	char b64_gwid[12];
+	PGresult *res;
+	
 
 	sigemptyset(&alarm_msk);
 	sigaddset(&alarm_msk, SIGALRM);
 
-	tval.it_value.tv_sec = period;
+	tval.it_value.tv_sec = gw_conf->telemetry_send_period;
 	tval.it_value.tv_usec = 0;
-	tval.it_interval.tv_sec = period;
+	tval.it_interval.tv_sec = gw_conf->telemetry_send_period;
 	tval.it_interval.tv_usec = 0;
 
 	if (setitimer(ITIMER_REAL, &tval, NULL)) {
@@ -469,11 +498,31 @@ void * gateway_mngr(void *gw_conf) {
 		return NULL;
 	}
 
+	base64_encode(gw_conf->gw_id, GATEWAY_ID_SIZE, b64_gwid);
+	
 	while (1) {
 		// get utc
+		gettimeofday(&tv, NULL);
+
 		// create applications and devices serving log
-		// flush utc and log into a query
-		printf("periodic action done!\n");
+		pthread_mutex_lock(&gw_stat_mutex);
+		gw_stat_linked_list_flush(buf, 0);
+		pthread_mutex_unlock(&gw_stat_mutex);
+
+		// flush utc and log into a query	
+		snprintf(qbuf, GW_MNGR_QBUF_LEN, "UPDATE gateways SET num_errors = %lld, last_keep_alive = %d, last_report = '%s' WHERE id = '%s'",
+				gw_stat.errors_count, (uint32_t) tv.tv_sec, buf, b64_gwid );
+
+		pthread_mutex_lock(&mutex);
+		res = PQexec(conn, qbuf);
+		pthread_mutex_unlock(&mutex);
+	
+		if (PQresultStatus(res) != PGRES_COMMAND_OK) {
+			fprintf(stderr, "gateway manager db update failed!\n");
+		}
+
+		buf[0] = '\0';
+		qbuf[0] = '\0';
 		sigwait(&alarm_msk, &sig);
 	}
 }
@@ -540,6 +589,7 @@ void gateway_protocol_checkup_callback(gateway_protocol_conf_t *gwp_conf) {
 		gwp_conf->secure = PQgetvalue(res, 0, 1)[0] == 't';
 	} else {
 		perror("gateway_protocol_checkup_callback error");
+		gw_stat.errors_count++;
 	}
 	PQclear(res);
 }
@@ -548,6 +598,7 @@ int send_gcom_ch(gcom_ch_t *gch, uint8_t *pck, uint8_t pck_size) {
 	int ret;
 	
 	if ((ret = sendto(gch->server_desc, (char *)pck, pck_size, 0, (struct sockaddr *)&gch->client, gch->sock_len)) < 0) {
+		gw_stat.errors_count++;
 		perror("sendto error");
 	}
 
@@ -558,6 +609,7 @@ int recv_gcom_ch(gcom_ch_t *gch, uint8_t *pck, uint8_t *pck_length, uint16_t pck
 	int ret;
 	if ((ret = recvfrom(gch->server_desc, (char *)pck, pck_size, MSG_WAITALL, (struct sockaddr *)&gch->client, &gch->sock_len)) < 0) {
 		perror("socket receive error");
+		gw_stat.errors_count++;
 	} else {
 		*pck_length = ret;
 		

src/gw_stat_linked_list.c

+#include "gw_stat_linked_list.h"
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define APP_KEY_SIZE 	8
+
+typedef struct _gw_stat_linked_list gw_stat_linked_list_t;
+
+typedef struct _gw_stat_linked_list {
+	char app_key[APP_KEY_SIZE+1];
+	uint8_t dev_id;
+	uint64_t num_msgs;
+	struct _gw_stat_linked_list *next;
+} _gw_stat_linked_list;
+
+static gw_stat_linked_list_t *root;
+static uint64_t size;
+
+void gw_stat_linked_list_init(void) {
+	root = NULL;
+	size = 0;
+}
+
+uint8_t gw_stat_linked_list_add(const char *app_key, const uint8_t dev_id) {
+	gw_stat_linked_list_t *ptr = root;
+	uint8_t found = 0, ret = 1;
+
+	while (ptr && !found) {
+		if (!memcmp(ptr->app_key, app_key, APP_KEY_SIZE) && ptr->dev_id == dev_id) {
+			found = 1;
+		} else {
+			ptr = ptr->next;
+		}
+	}
+	
+	if (ptr) {
+		ptr->num_msgs++;
+	} else {
+		ptr = (gw_stat_linked_list_t *)malloc(sizeof(gw_stat_linked_list_t));
+		if (ptr) {
+			memcpy(ptr->app_key, app_key, APP_KEY_SIZE);
+			ptr->app_key[APP_KEY_SIZE] = '\0';
+			ptr->dev_id = dev_id;
+			ptr->num_msgs = 1;
+			ptr->next = root;
+			root = ptr;
+
+			size++;
+		} else {
+			ret = 0;
+		}
+	}
+
+	return ret;
+}
+
+void gw_stat_linked_list_flush(char *store, uint8_t file) {
+	gw_stat_linked_list_t *ptr = root, *tmp;
+	char buf[64];
+	FILE *fp;
+	
+	if (ptr && size) {
+		if (file) { // file output
+			fp = fopen(store, "w");
+			
+			while (ptr) {
+				snprintf(buf, 64, "%s#%d#%lld|", ptr->app_key, ptr->dev_id, ptr->num_msgs);
+				fwrite(buf, strlen(buf), 1, fp);
+				
+				tmp = ptr;
+				ptr = ptr->next;
+				free(tmp);
+			}
+
+			fclose(fp);
+		} else { // str output
+			store[0] = '\0';
+
+			while (ptr) {
+				snprintf(buf, 64, "%s#%d#%lld|", ptr->app_key, ptr->dev_id, ptr->num_msgs);
+				strcat(store, buf);
+				
+				tmp = ptr;
+				ptr = ptr->next;
+				free(tmp);
+			}
+		}
+		size = 0;
+		root = NULL;
+	}
+}
+
+void gw_stat_linked_list_destroy(void) {
+	gw_stat_linked_list_t *ptr = root, *tmp;
+	
+	while (ptr && size) {
+		tmp = ptr;
+		ptr = ptr->next;
+		free(tmp);
+		
+		size--;
+	}
+	root = NULL;
+}