Include MySQLServers_SslParams in MySQL_Connection

This allows to preserve the parameters, and output in the error log if needed

include/mysql_connection.h

@@ -21,6 +21,8 @@ using json = nlohmann::json;
 #define STATUS_MYSQL_CONNECTION_HAS_SAVEPOINT        0x00000800
 #define STATUS_MYSQL_CONNECTION_HAS_WARNINGS         0x00001000
 
+class MySQLServers_SslParams;
+
 class Variable {
 public:
 	char *value = (char*)"";
@@ -151,6 +153,9 @@ class MySQL_Connection {
 	bool unknown_transaction_status;
 	void compute_unknown_transaction_status();
 	char gtid_uuid[128];
+
+	MySQLServers_SslParams * ssl_params = NULL;
+
 	MySQL_Connection();
 	~MySQL_Connection();
 	bool set_autocommit(bool);

lib/mysql_connection.cpp

@@ -514,6 +514,11 @@ MySQL_Connection::~MySQL_Connection() {
 
 	if (connected_host_details.ip)
 		free(connected_host_details.ip);
+
+	if (ssl_params != NULL) {
+		delete ssl_params;
+		ssl_params = NULL;
+	}
 };
 
 bool MySQL_Connection::set_autocommit(bool _ac) {
@@ -740,7 +745,11 @@ void MySQL_Connection::connect_start() {
 		mysql_options4(mysql, MYSQL_OPT_CONNECT_ATTR_ADD, "mysql_bug_102266", "Avoid MySQL bug https://bugs.mysql.com/bug.php?id=102266 , https://github.com/sysown/proxysql/issues/3276");
 	}
 	if (parent->use_ssl) {
-		MySQLServers_SslParams * ssl_params = MyHGM->get_Server_SSL_Params(parent->address, parent->port, userinfo->username);
+		if (ssl_params != NULL) {
+			delete ssl_params;
+			ssl_params = NULL;
+		}
+		ssl_params = MyHGM->get_Server_SSL_Params(parent->address, parent->port, userinfo->username);
 		if (ssl_params == NULL) {
 			mysql_ssl_set(mysql,
 					mysql_thread___ssl_p2s_key,
@@ -760,7 +769,6 @@ void MySQL_Connection::connect_start() {
 			);
 			mysql_options(mysql, MYSQL_OPT_SSL_CRL, ssl_params->ssl_crl.c_str());
 			mysql_options(mysql, MYSQL_OPT_SSL_CRLPATH, ssl_params->ssl_crlpath.c_str());
-			delete ssl_params;
 		}
 		mysql_options(mysql, MARIADB_OPT_SSL_KEYLOG_CALLBACK, (void*)proxysql_keylog_write_line_callback);
 	}
@@ -1151,13 +1159,29 @@ handler_again:
 				}
 			}
 			if (!ret_mysql) {
-				// always increase the counter
-				proxy_error("Failed to mysql_real_connect() on %u:%s:%d , FD (Conn:%d , MyDS:%d) , %d: %s.\n", parent->myhgc->hid, parent->address, parent->port, mysql->net.fd , myds->fd, mysql_errno(mysql), mysql_error(mysql));
-    		NEXT_IMMEDIATE(ASYNC_CONNECT_FAILED);
+				int myerr = mysql_errno(mysql);
+				if (ssl_params != NULL && myerr == 2026) {
+					proxy_error("Failed to mysql_real_connect() on %u:%s:%d , FD (Conn:%d , MyDS:%d) , %d: %s. SSL Params: %s , %s , %s , %s , %s , %s , %s , %s\n",
+						parent->myhgc->hid, parent->address, parent->port, mysql->net.fd , myds->fd, mysql_errno(mysql), mysql_error(mysql),
+						ssl_params->ssl_ca.c_str() , ssl_params->ssl_cert.c_str() , ssl_params->ssl_key.c_str() , ssl_params->ssl_capath.c_str() ,
+						ssl_params->ssl_crl.c_str() , ssl_params->ssl_crlpath.c_str() , ssl_params->ssl_cipher.c_str() , ssl_params->tls_version.c_str()
+					);
+				} else {
+					proxy_error("Failed to mysql_real_connect() on %u:%s:%d , FD (Conn:%d , MyDS:%d) , %d: %s.\n", parent->myhgc->hid, parent->address, parent->port, mysql->net.fd , myds->fd, mysql_errno(mysql), mysql_error(mysql));
+				}
+				if (ssl_params != NULL) {
+					delete ssl_params;
+					ssl_params = NULL;
+				}
+				NEXT_IMMEDIATE(ASYNC_CONNECT_FAILED);
 			} else {
-    		NEXT_IMMEDIATE(ASYNC_CONNECT_SUCCESSFUL);
+				if (ssl_params != NULL) {
+					delete ssl_params;
+					ssl_params = NULL;
+				}
+				NEXT_IMMEDIATE(ASYNC_CONNECT_SUCCESSFUL);
 			}
-    	break;
+			break;
 		case ASYNC_CONNECT_SUCCESSFUL:
 			if (mysql && ret_mysql) {
 				// PMC-10005