struct cds_lfht_node client_socket_ht_node;
struct {
struct {
+ /*
+ * During the reception of a message, the reception
+ * buffers' "size" is set to contain the current
+ * message's complete payload.
+ */
struct lttng_dynamic_buffer buffer;
/* Bytes left to receive for the current message. */
size_t bytes_to_receive;
* Indicates whether or not credentials are expected
* from the client.
*/
- bool receive_creds;
+ bool expect_creds;
/*
* Indicates whether or not credentials were received
* from the client.
*/
bool creds_received;
+ /* Only used during credentials reception. */
lttng_sock_cred creds;
} inbound;
struct {
}
static
-void client_reset_inbound_state(struct notification_client *client)
+int client_reset_inbound_state(struct notification_client *client)
{
int ret;
sizeof(struct lttng_notification_channel_message);
client->communication.inbound.msg_type =
LTTNG_NOTIFICATION_CHANNEL_MESSAGE_TYPE_UNKNOWN;
- client->communication.inbound.receive_creds = false;
LTTNG_SOCK_SET_UID_CRED(&client->communication.inbound.creds, -1);
LTTNG_SOCK_SET_GID_CRED(&client->communication.inbound.creds, -1);
+ ret = lttng_dynamic_buffer_set_size(
+ &client->communication.inbound.buffer,
+ client->communication.inbound.bytes_to_receive);
+ return ret;
}
int handle_notification_thread_client_connect(
CDS_INIT_LIST_HEAD(&client->condition_list);
lttng_dynamic_buffer_init(&client->communication.inbound.buffer);
lttng_dynamic_buffer_init(&client->communication.outbound.buffer);
- client_reset_inbound_state(client);
+ client->communication.inbound.expect_creds = true;
+ ret = client_reset_inbound_state(client);
+ if (ret) {
+ ERR("[notification-thread] Failed to reset client communication's inbound state");
+ ret = 0;
+ goto error;
+ }
ret = lttcomm_accept_unix_sock(state->notification_channel_socket);
if (ret < 0) {
client->communication.inbound.bytes_to_receive = msg->size;
client->communication.inbound.msg_type =
(enum lttng_notification_channel_message_type) msg->type;
- if (client->communication.inbound.msg_type ==
- LTTNG_NOTIFICATION_CHANNEL_MESSAGE_TYPE_HANDSHAKE) {
- client->communication.inbound.receive_creds = true;
- }
ret = lttng_dynamic_buffer_set_size(
- &client->communication.inbound.buffer, 0);
+ &client->communication.inbound.buffer, msg->size);
if (ret) {
goto end;
}
}
/* Set reception state to receive the next message header. */
- client_reset_inbound_state(client);
+ ret = client_reset_inbound_state(client);
+ if (ret) {
+ ERR("[notification-thread] Failed to reset client communication's inbound state");
+ goto end;
+ }
client->validated = true;
break;
}
}
/* Set reception state to receive the next message header. */
- client_reset_inbound_state(client);
+ ret = client_reset_inbound_state(client);
+ if (ret) {
+ ERR("[notification-thread] Failed to reset client communication's inbound state");
+ goto end;
+ }
break;
}
default:
int handle_notification_thread_client_in(
struct notification_thread_state *state, int socket)
{
- int ret;
+ int ret = 0;
struct notification_client *client;
ssize_t recv_ret;
size_t offset;
goto end;
}
- offset = client->communication.inbound.buffer.size;
- ret = lttng_dynamic_buffer_set_size(
- &client->communication.inbound.buffer,
- client->communication.inbound.bytes_to_receive);
- if (ret) {
- goto end;
- }
-
- if (client->communication.inbound.receive_creds) {
+ offset = client->communication.inbound.buffer.size -
+ client->communication.inbound.bytes_to_receive;
+ if (client->communication.inbound.expect_creds) {
recv_ret = lttcomm_recv_creds_unix_sock(socket,
client->communication.inbound.buffer.data + offset,
client->communication.inbound.bytes_to_receive,
&client->communication.inbound.creds);
if (recv_ret > 0) {
- client->communication.inbound.receive_creds = false;
+ client->communication.inbound.expect_creds = false;
client->communication.inbound.creds_received = true;
}
} else {
}
client->communication.inbound.bytes_to_receive -= recv_ret;
- ret = lttng_dynamic_buffer_set_size(
- &client->communication.inbound.buffer,
- client->communication.inbound.buffer.size -
- client->communication.inbound.bytes_to_receive);
- if (ret) {
- goto end;
- }
-
if (client->communication.inbound.bytes_to_receive == 0) {
ret = client_dispatch_message(client, state);
if (ret) {