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gnrc_tcp: syn_rcvd pkt loss fix

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This commit is contained in:
Simon Brummer 2019-02-04 20:57:30 +01:00
parent 7220b66708
commit 5dc3f8dc3d
2 changed files with 26 additions and 6 deletions
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31
sys/net/gnrc/transport_layer/tcp/gnrc_tcp.c
View File

@ -203,14 +203,33 @@ static int _gnrc_tcp_open(gnrc_tcp_tcb_t *tcb, char *target_addr, uint16_t targe
tcb->state != FSM_STATE_CLOSE_WAIT) {
mbox_get(&(tcb->mbox), &msg);
switch (msg.type) {
case MSG_TYPE_CONNECTION_TIMEOUT:
DEBUG("gnrc_tcp.c : _gnrc_tcp_open() : CONNECTION_TIMEOUT\n");
_fsm(tcb, FSM_EVENT_TIMEOUT_CONNECTION, NULL, NULL, 0);
ret = -ETIMEDOUT;
break;
case MSG_TYPE_NOTIFY_USER:
DEBUG("gnrc_tcp.c : _gnrc_tcp_open() : MSG_TYPE_NOTIFY_USER\n");
/* Setup a timeout to be able to revert back to LISTEN state, in case the
* send SYN+ACK we received upon entering SYN_RCVD is never acknowledged
* by the peer. */
if ((tcb->state == FSM_STATE_SYN_RCVD) && (tcb->status & STATUS_PASSIVE)) {
_setup_timeout(&connection_timeout, GNRC_TCP_CONNECTION_TIMEOUT_DURATION,
_cb_mbox_put_msg, &connection_timeout_arg);
}
break;
case MSG_TYPE_CONNECTION_TIMEOUT:
DEBUG("gnrc_tcp.c : _gnrc_tcp_open() : CONNECTION_TIMEOUT\n");
/* The connection establishment attempt timed out:
* 1) Active connections return -ETIMEOUT.
* 2) Passive connections stop the ongoing retransmissions and repeat the
* open call to wait for the next connection attempt. */
if (tcb->status & STATUS_PASSIVE) {
_fsm(tcb, FSM_EVENT_CLEAR_RETRANSMIT, NULL, NULL, 0);
_fsm(tcb, FSM_EVENT_CALL_OPEN, NULL, NULL, 0);
}
else {
_fsm(tcb, FSM_EVENT_TIMEOUT_CONNECTION, NULL, NULL, 0);
ret = -ETIMEDOUT;
}
break;
default:

1
sys/net/gnrc/transport_layer/tcp/gnrc_tcp_fsm.c
View File

@ -191,6 +191,7 @@ static int _transition_to(gnrc_tcp_tcb_t *tcb, fsm_state_t state)
mutex_unlock(&_list_tcb_lock);
break;
case FSM_STATE_SYN_RCVD:
case FSM_STATE_ESTABLISHED:
case FSM_STATE_CLOSE_WAIT:
tcb->status |= STATUS_NOTIFY_USER;