diff --git a/src/apps/relay/dbdrivers/dbd_mongo.c b/src/apps/relay/dbdrivers/dbd_mongo.c
index cefe3af0..da28fe69 100644
--- a/src/apps/relay/dbdrivers/dbd_mongo.c
+++ b/src/apps/relay/dbdrivers/dbd_mongo.c
@@ -714,7 +714,7 @@ static int mongo_set_secret(u08bits *secret, u08bits *realm) {
   }
 }
 
-static int mongo_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int delete)
+static int mongo_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int del)
 {
 	char sub_collection_name[129];
 	snprintf(sub_collection_name,sizeof(sub_collection_name)-1,"%s_peer_ip",kind);
@@ -733,7 +733,7 @@ static int mongo_set_permission_ip(const char *kind, u08bits *realm, const char*
 	bson_init(&query);
 	BSON_APPEND_UTF8(&query, "realm", (const char *)realm);
 	bson_init(&doc);
-	if(delete) {
+	if(del) {
 		bson_append_document_begin(&doc, "$pull", -1, &child);
 	} else {
 		bson_append_document_begin(&doc, "$addToSet", -1, &child);
@@ -741,9 +741,9 @@ static int mongo_set_permission_ip(const char *kind, u08bits *realm, const char*
 	BSON_APPEND_UTF8(&child, sub_collection_name, (const char *)ip);
 	bson_append_document_end(&doc, &child);
 
-	mongoc_update_flags_t flags = 0;
+	mongoc_update_flags_t flags = MONGOC_UPDATE_NONE;
 
-	if(delete) {
+	if(del) {
 		flags = MONGOC_UPDATE_MULTI_UPDATE;
 	} else {
 		flags = MONGOC_UPDATE_UPSERT;
diff --git a/src/apps/relay/dbdrivers/dbd_mysql.c b/src/apps/relay/dbdrivers/dbd_mysql.c
index ceaa96a9..068cc048 100644
--- a/src/apps/relay/dbdrivers/dbd_mysql.c
+++ b/src/apps/relay/dbdrivers/dbd_mysql.c
@@ -724,7 +724,7 @@ static int mysql_set_secret(u08bits *secret, u08bits *realm) {
   return ret;
 }
 
-static int mysql_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int delete)
+static int mysql_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int del)
 {
 	int ret = -1;
 
@@ -737,7 +737,7 @@ static int mysql_set_permission_ip(const char *kind, u08bits *realm, const char*
 
 	MYSQL * myc = get_mydb_connection();
 	if (myc) {
-		if(delete) {
+		if(del) {
 			snprintf(statement, sizeof(statement), "delete from %s_peer_ip where realm = '%s'  and ip_range = '%s'", kind, (char*)realm, ip);
 		} else {
 			snprintf(statement, sizeof(statement), "insert into %s_peer_ip (realm,ip_range) values('%s','%s')", kind, (char*)realm, ip);
diff --git a/src/apps/relay/dbdrivers/dbd_pgsql.c b/src/apps/relay/dbdrivers/dbd_pgsql.c
index 2141a6ca..c94ab1de 100644
--- a/src/apps/relay/dbdrivers/dbd_pgsql.c
+++ b/src/apps/relay/dbdrivers/dbd_pgsql.c
@@ -490,7 +490,7 @@ static int pgsql_set_secret(u08bits *secret, u08bits *realm) {
 	return ret;
 }
 
-static int pgsql_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int delete)
+static int pgsql_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int del)
 {
 	int ret = -1;
 
@@ -505,7 +505,7 @@ static int pgsql_set_permission_ip(const char *kind, u08bits *realm, const char*
 
 	if (pqc) {
 
-		if(delete) {
+		if(del) {
 			snprintf(statement, sizeof(statement), "delete from %s_peer_ip where realm = '%s'  and ip_range = '%s'", kind, (char*)realm, ip);
 		} else {
 			snprintf(statement, sizeof(statement), "insert into %s_peer_ip (realm,ip_range) values('%s','%s')", kind, (char*)realm, ip);
diff --git a/src/apps/relay/dbdrivers/dbd_redis.c b/src/apps/relay/dbdrivers/dbd_redis.c
index 4f100af6..0f3e44ec 100644
--- a/src/apps/relay/dbdrivers/dbd_redis.c
+++ b/src/apps/relay/dbdrivers/dbd_redis.c
@@ -827,7 +827,7 @@ static int redis_set_secret(u08bits *secret, u08bits *realm)
 	return ret;
 }
 
-static int redis_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int delete)
+static int redis_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int del)
 {
 	int ret = -1;
 
@@ -840,7 +840,7 @@ static int redis_set_permission_ip(const char *kind, u08bits *realm, const char*
 	if (rc) {
 		char s[TURN_LONG_STRING_SIZE];
 
-		if(delete) {
+		if(del) {
 			snprintf(s, sizeof(s), "srem turn/realm/%s/%s-peer-ip %s", (char*) realm, kind, ip);
 		} else {
 			snprintf(s, sizeof(s), "sadd turn/realm/%s/%s-peer-ip %s", (char*) realm, kind, ip);
diff --git a/src/apps/relay/dbdrivers/dbd_sqlite.c b/src/apps/relay/dbdrivers/dbd_sqlite.c
index f86b559d..7815fe7f 100644
--- a/src/apps/relay/dbdrivers/dbd_sqlite.c
+++ b/src/apps/relay/dbdrivers/dbd_sqlite.c
@@ -976,7 +976,7 @@ static int sqlite_get_ip_list(const char *kind, ip_range_list_t * list)
 	return ret;
 }
 
-static int sqlite_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int delete)
+static int sqlite_set_permission_ip(const char *kind, u08bits *realm, const char* ip, int del)
 {
 	int ret = -1;
 
@@ -995,7 +995,7 @@ static int sqlite_set_permission_ip(const char *kind, u08bits *realm, const char
 
 		sqlite_lock(1);
 
-		if(delete) {
+		if(del) {
 			snprintf(statement, sizeof(statement), "delete from %s_peer_ip where realm = '%s'  and ip_range = '%s'", kind, (char*)realm, ip);
 		} else {
 			snprintf(statement, sizeof(statement), "insert or replace into %s_peer_ip (realm,ip_range) values('%s','%s')", kind, (char*)realm, ip);
diff --git a/src/apps/relay/dbdrivers/dbdriver.h b/src/apps/relay/dbdrivers/dbdriver.h
index 4aaa566a..5b36aad2 100644
--- a/src/apps/relay/dbdrivers/dbdriver.h
+++ b/src/apps/relay/dbdrivers/dbdriver.h
@@ -63,7 +63,7 @@ typedef struct _turn_dbdriver_t {
   int (*list_realm_options)(u08bits *realm);
   void (*auth_ping)(void * rch);
   int (*get_ip_list)(const char *kind, ip_range_list_t * list);
-  int (*set_permission_ip)(const char *kind, u08bits *realm, const char* ip, int delete);
+  int (*set_permission_ip)(const char *kind, u08bits *realm, const char* ip, int del);
   void (*reread_realms)(secrets_list_t * realms_list);
   int (*set_oauth_key)(oauth_key_data_raw *key);
   int (*get_oauth_key)(const u08bits *kid, oauth_key_data_raw *key);
diff --git a/src/apps/relay/http_server.c b/src/apps/relay/http_server.c
index 39c98345..7b0b0b8f 100644
--- a/src/apps/relay/http_server.c
+++ b/src/apps/relay/http_server.c
@@ -104,7 +104,7 @@ const char* get_http_date_header()
 static struct headers_list * post_parse(char *data, size_t data_len)
 {
 	while((*data=='\r')||(*data=='\n')) ++data;
-	char *post_data = calloc(data_len + 1, sizeof(char));
+	char *post_data = (char*)calloc(data_len + 1, sizeof(char));
 	memcpy(post_data, data, data_len);
 	char *fmarker = NULL;
 	char *fsplit = strtok_r(post_data, "&", &fmarker);
@@ -114,7 +114,9 @@ static struct headers_list * post_parse(char *data, size_t data_len)
 		char *vmarker = NULL;
 		char *key = strtok_r(fsplit, "=", &vmarker);
 		char *value = strtok_r(NULL, "=", &vmarker);
-		value = value ? value : "";
+		char empty[1];
+		empty[0]=0;
+		value = value ? value : empty;
 		value = evhttp_decode_uri(value);
 		char *p = value;
 		while (*p) {
diff --git a/src/apps/relay/ns_ioalib_engine_impl.c b/src/apps/relay/ns_ioalib_engine_impl.c
index c6a12342..34027854 100644
--- a/src/apps/relay/ns_ioalib_engine_impl.c
+++ b/src/apps/relay/ns_ioalib_engine_impl.c
@@ -3257,7 +3257,11 @@ int send_data_from_ioa_socket_tcp(ioa_socket_handle s, const void *data, size_t
 
 int send_str_from_ioa_socket_tcp(ioa_socket_handle s, const void *data)
 {
-	return send_data_from_ioa_socket_tcp(s, data, strlen(data));
+	if(data) {
+		return send_data_from_ioa_socket_tcp(s, data, strlen((const char*)data));
+	} else {
+		return 0;
+	}
 }
 
 int send_ulong_from_ioa_socket_tcp(ioa_socket_handle s, size_t data)