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Fixed failed handshake handling, taking care of dcb->delayq before sending reply one time and not twice.

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This commit is contained in:
Massimiliano Pinto
2013-09-13 18:22:24 +02:00
parent 88174865a0
commit b2b715fcae
1 changed files with 43 additions and 28 deletions
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39
server/modules/protocol/mysql_backend.c
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@ -170,12 +170,12 @@ static int gw_read_backend_event(DCB *dcb) {
* 3. and return
*/
if (backend_protocol->state == MYSQL_CONNECTED) {
if (gw_read_backend_handshake(backend_protocol) < 0) {
// read mysql handshake
if (gw_read_backend_handshake(backend_protocol) != 0) {
backend_protocol->state = MYSQL_AUTH_FAILED;
rc = 1;
goto return_rc;
}
} else {
// handshake decoded, send the auth credentials
if (gw_send_authentication_to_backend(
current_session->db,
current_session->user,
@ -183,18 +183,23 @@ static int gw_read_backend_event(DCB *dcb) {
backend_protocol) != 0) {
backend_protocol->state = MYSQL_AUTH_FAILED;
rc = 1;
} else {
// next step is waiting server response with a new EPOLLIN event
backend_protocol->state = MYSQL_AUTH_RECV;
rc = 0;
goto return_rc;
}
// the protocol state here is MYSQL_AUTH_RECV
ss_dassert(backend_protocol->state == MYSQL_AUTH_RECV);
rc = 1;
goto return_rc;
}
}
/* ready to check the authentication reply from backend */
/*
* Now:
* -- check the authentication reply from backend
* OR
* -- handle a previous handshake error
*/
if (backend_protocol->state == MYSQL_AUTH_RECV) {
if (backend_protocol->state == MYSQL_AUTH_RECV || backend_protocol->state == MYSQL_AUTH_FAILED) {
ROUTER_OBJECT *router = NULL;
ROUTER *router_instance = NULL;
void *rsession = NULL;
@ -206,8 +211,13 @@ static int gw_read_backend_event(DCB *dcb) {
router = session->service->router;
router_instance = session->service->router_instance;
/* read backed auth reply */
/* if a MYSQL_AUTH_FAILED is detected, don't read from backend and set rv */
if (backend_protocol->state == MYSQL_AUTH_FAILED) {
rv = MYSQL_FAILED_AUTHENTICATION;
} else {
/* yes, do read backed auth reply */
rv = gw_receive_backend_auth(backend_protocol);
}
switch (rv) {
case MYSQL_FAILED_AUTHENTICATION:
@ -222,12 +232,17 @@ static int gw_read_backend_event(DCB *dcb) {
current_session->user);
backend_protocol->state = MYSQL_AUTH_FAILED;
/* check the delayq before the reply */
if (dcb->delayq) {
/* send an error to the client */
mysql_send_custom_error(
dcb->session->client,
1,
0,
"Connection to backend lost right now");
}
/**
* Protect call of closeSession.
*/