static void nn_aws_handler (struct nn_fsm *self, int src, int type,
NN_UNUSED void *srcptr)
{
struct nn_aws *aws;
int val;
size_t sz;
aws = nn_cont (self, struct nn_aws, fsm);
nn_assert (aws);
switch (aws->state) {
/******************************************************************************/
/* IDLE state. */
/* The state machine wasn't yet started. */
/******************************************************************************/
case NN_AWS_STATE_IDLE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_FSM_START:
nn_usock_accept (&aws->usock, aws->listener);
aws->state = NN_AWS_STATE_ACCEPTING;
return;
default:
nn_fsm_bad_action (aws->state, src, type);
}
default:
nn_fsm_bad_source (aws->state, src, type);
}
/******************************************************************************/
/* ACCEPTING state. */
/* Waiting for incoming connection. */
/******************************************************************************/
case NN_AWS_STATE_ACCEPTING:
switch (src) {
case NN_AWS_SRC_USOCK:
switch (type) {
case NN_USOCK_ACCEPTED:
nn_epbase_clear_error (aws->epbase);
/* Set the relevant socket options. */
sz = sizeof (val);
nn_epbase_getopt (aws->epbase, NN_SOL_SOCKET, NN_SNDBUF,
&val, &sz);
nn_assert (sz == sizeof (val));
nn_usock_setsockopt (&aws->usock, SOL_SOCKET, SO_SNDBUF,
&val, sizeof (val));
sz = sizeof (val);
nn_epbase_getopt (aws->epbase, NN_SOL_SOCKET, NN_RCVBUF,
&val, &sz);
nn_assert (sz == sizeof (val));
nn_usock_setsockopt (&aws->usock, SOL_SOCKET, SO_RCVBUF,
&val, sizeof (val));
/* Since the WebSocket handshake must poll, the receive
timeout is set to zero. Later, it will be set again
to the value specified by the socket option. */
val = 0;
sz = sizeof (val);
nn_usock_setsockopt (&aws->usock, SOL_SOCKET, SO_RCVTIMEO,
&val, sizeof (val));
/* Return ownership of the listening socket to the parent. */
nn_usock_swap_owner (aws->listener, &aws->listener_owner);
aws->listener = NULL;
aws->listener_owner.src = -1;
aws->listener_owner.fsm = NULL;
nn_fsm_raise (&aws->fsm, &aws->accepted, NN_AWS_ACCEPTED);
/* Start the sws state machine. */
nn_usock_activate (&aws->usock);
nn_sws_start (&aws->sws, &aws->usock, NN_WS_SERVER,
NULL, NULL);
aws->state = NN_AWS_STATE_ACTIVE;
nn_epbase_stat_increment (aws->epbase,
NN_STAT_ACCEPTED_CONNECTIONS, 1);
return;
default:
nn_fsm_bad_action (aws->state, src, type);
}
case NN_AWS_SRC_LISTENER:
switch (type) {
case NN_USOCK_ACCEPT_ERROR:
nn_epbase_set_error (aws->epbase,
nn_usock_geterrno (aws->listener));
nn_epbase_stat_increment (aws->epbase,
NN_STAT_ACCEPT_ERRORS, 1);
nn_usock_accept (&aws->usock, aws->listener);
return;
default:
nn_fsm_bad_action (aws->state, src, type);
}
default:
nn_fsm_bad_source (aws->state, src, type);
}
/******************************************************************************/
/* ACTIVE state. */
/******************************************************************************/
case NN_AWS_STATE_ACTIVE:
switch (src) {
case NN_AWS_SRC_SWS:
switch (type) {
case NN_SWS_RETURN_CLOSE_HANDSHAKE:
/* Peer closed connection without intention to reconnect, or
local endpoint failed remote because of invalid data. */
nn_sws_stop (&aws->sws);
aws->state = NN_AWS_STATE_STOPPING_SWS;
return;
case NN_SWS_RETURN_ERROR:
nn_sws_stop (&aws->sws);
aws->state = NN_AWS_STATE_STOPPING_SWS;
nn_epbase_stat_increment (aws->epbase,
NN_STAT_BROKEN_CONNECTIONS, 1);
return;
default:
nn_fsm_bad_action (aws->state, src, type);
}
default:
nn_fsm_bad_source (aws->state, src, type);
}
/******************************************************************************/
/* STOPPING_SWS state. */
/******************************************************************************/
case NN_AWS_STATE_STOPPING_SWS:
switch (src) {
case NN_AWS_SRC_SWS:
switch (type) {
case NN_USOCK_SHUTDOWN:
return;
case NN_SWS_RETURN_STOPPED:
nn_usock_stop (&aws->usock);
aws->state = NN_AWS_STATE_STOPPING_USOCK;
return;
default:
nn_fsm_bad_action (aws->state, src, type);
}
default:
nn_fsm_bad_source (aws->state, src, type);
}
/******************************************************************************/
/* STOPPING_USOCK state. */
/******************************************************************************/
case NN_AWS_STATE_STOPPING_USOCK:
switch (src) {
case NN_AWS_SRC_USOCK:
switch (type) {
case NN_USOCK_SHUTDOWN:
return;
case NN_USOCK_STOPPED:
nn_aws_stop (aws);
return;
default:
nn_fsm_bad_action (aws->state, src, type);
}
default:
nn_fsm_bad_source (aws->state, src, type);
}
/******************************************************************************/
/* Invalid state. */
/******************************************************************************/
default:
nn_fsm_bad_state (aws->state, src, type);
}
}
static void nn_cws_handler (struct nn_fsm *self, int src, int type,
NN_UNUSED void *srcptr)
{
struct nn_cws *cws;
cws = nn_cont (self, struct nn_cws, fsm);
switch (cws->state) {
/******************************************************************************/
/* IDLE state. */
/* The state machine wasn't yet started. */
/******************************************************************************/
case NN_CWS_STATE_IDLE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_FSM_START:
nn_cws_start_resolving (cws);
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* RESOLVING state. */
/* Name of the host to connect to is being resolved to get an IP address. */
/******************************************************************************/
case NN_CWS_STATE_RESOLVING:
switch (src) {
case NN_CWS_SRC_DNS:
switch (type) {
case NN_DNS_DONE:
nn_dns_stop (&cws->dns);
cws->state = NN_CWS_STATE_STOPPING_DNS;
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* STOPPING_DNS state. */
/* dns object was asked to stop but it haven't stopped yet. */
/******************************************************************************/
case NN_CWS_STATE_STOPPING_DNS:
switch (src) {
case NN_CWS_SRC_DNS:
switch (type) {
case NN_DNS_STOPPED:
if (cws->dns_result.error == 0) {
nn_cws_start_connecting (cws, &cws->dns_result.addr,
cws->dns_result.addrlen);
return;
}
nn_backoff_start (&cws->retry);
cws->state = NN_CWS_STATE_WAITING;
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* CONNECTING state. */
/* Non-blocking connect is under way. */
/******************************************************************************/
case NN_CWS_STATE_CONNECTING:
switch (src) {
case NN_CWS_SRC_USOCK:
switch (type) {
case NN_USOCK_CONNECTED:
nn_sws_start (&cws->sws, &cws->usock, NN_WS_CLIENT,
nn_chunkref_data (&cws->resource),
nn_chunkref_data (&cws->remote_host), cws->msg_type);
cws->state = NN_CWS_STATE_ACTIVE;
cws->peer_gone = 0;
nn_epbase_stat_increment (&cws->epbase,
NN_STAT_INPROGRESS_CONNECTIONS, -1);
nn_epbase_stat_increment (&cws->epbase,
NN_STAT_ESTABLISHED_CONNECTIONS, 1);
nn_epbase_clear_error (&cws->epbase);
return;
case NN_USOCK_ERROR:
nn_epbase_set_error (&cws->epbase,
nn_usock_geterrno (&cws->usock));
nn_usock_stop (&cws->usock);
cws->state = NN_CWS_STATE_STOPPING_USOCK;
nn_epbase_stat_increment (&cws->epbase,
NN_STAT_INPROGRESS_CONNECTIONS, -1);
nn_epbase_stat_increment (&cws->epbase,
NN_STAT_CONNECT_ERRORS, 1);
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* ACTIVE state. */
/* Connection is established and handled by the sws state machine. */
/******************************************************************************/
case NN_CWS_STATE_ACTIVE:
switch (src) {
case NN_CWS_SRC_SWS:
switch (type) {
case NN_SWS_RETURN_CLOSE_HANDSHAKE:
/* Peer closed connection without intention to reconnect, or
local endpoint failed remote because of invalid data. */
nn_sws_stop (&cws->sws);
cws->state = NN_CWS_STATE_STOPPING_SWS;
cws->peer_gone = 1;
return;
case NN_SWS_RETURN_ERROR:
nn_sws_stop (&cws->sws);
cws->state = NN_CWS_STATE_STOPPING_SWS;
nn_epbase_stat_increment (&cws->epbase,
NN_STAT_BROKEN_CONNECTIONS, 1);
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* STOPPING_SWS state. */
/* sws object was asked to stop but it haven't stopped yet. */
/******************************************************************************/
case NN_CWS_STATE_STOPPING_SWS:
switch (src) {
case NN_CWS_SRC_SWS:
switch (type) {
case NN_USOCK_SHUTDOWN:
return;
case NN_SWS_RETURN_STOPPED:
nn_usock_stop (&cws->usock);
cws->state = NN_CWS_STATE_STOPPING_USOCK;
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* STOPPING_USOCK state. */
/* usock object was asked to stop but it haven't stopped yet. */
/******************************************************************************/
case NN_CWS_STATE_STOPPING_USOCK:
switch (src) {
case NN_CWS_SRC_USOCK:
switch (type) {
case NN_USOCK_SHUTDOWN:
return;
case NN_USOCK_STOPPED:
/* If the peer has confirmed itself gone with a Closing
Handshake, or if the local endpoint failed the remote,
don't try to reconnect. */
if (!cws->peer_gone) {
nn_backoff_start (&cws->retry);
cws->state = NN_CWS_STATE_WAITING;
}
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* WAITING state. */
/* Waiting before re-connection is attempted. This way we won't overload */
/* the system by continuous re-connection attemps. */
/******************************************************************************/
case NN_CWS_STATE_WAITING:
switch (src) {
case NN_CWS_SRC_RECONNECT_TIMER:
switch (type) {
case NN_BACKOFF_TIMEOUT:
nn_backoff_stop (&cws->retry);
cws->state = NN_CWS_STATE_STOPPING_BACKOFF;
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* STOPPING_BACKOFF state. */
/* backoff object was asked to stop, but it haven't stopped yet. */
/******************************************************************************/
case NN_CWS_STATE_STOPPING_BACKOFF:
switch (src) {
case NN_CWS_SRC_RECONNECT_TIMER:
switch (type) {
case NN_BACKOFF_STOPPED:
nn_cws_start_resolving (cws);
return;
default:
nn_fsm_bad_action (cws->state, src, type);
}
default:
nn_fsm_bad_source (cws->state, src, type);
}
/******************************************************************************/
/* Invalid state. */
/******************************************************************************/
default:
nn_fsm_bad_state (cws->state, src, type);
}
}
