static void pn_handshaker_dispatch(pn_handler_t *handler, pn_event_t *event, pn_event_type_t type) {
switch (type) {
case PN_CONNECTION_REMOTE_OPEN:
{
pn_connection_t *conn = pn_event_connection(event);
if (pn_connection_state(conn) & PN_LOCAL_UNINIT) {
pn_connection_open(conn);
}
}
break;
case PN_SESSION_REMOTE_OPEN:
{
pn_session_t *ssn = pn_event_session(event);
if (pn_session_state(ssn) & PN_LOCAL_UNINIT) {
pn_session_open(ssn);
}
}
break;
case PN_LINK_REMOTE_OPEN:
{
pn_link_t *link = pn_event_link(event);
if (pn_link_state(link) & PN_LOCAL_UNINIT) {
pn_terminus_copy(pn_link_source(link), pn_link_remote_source(link));
pn_terminus_copy(pn_link_target(link), pn_link_remote_target(link));
pn_link_open(link);
}
}
break;
case PN_CONNECTION_REMOTE_CLOSE:
{
pn_connection_t *conn = pn_event_connection(event);
if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) {
pn_connection_close(conn);
}
}
break;
case PN_SESSION_REMOTE_CLOSE:
{
pn_session_t *ssn = pn_event_session(event);
if (!(pn_session_state(ssn) & PN_LOCAL_CLOSED)) {
pn_session_close(ssn);
}
}
break;
case PN_LINK_REMOTE_CLOSE:
{
pn_link_t *link = pn_event_link(event);
if (!(pn_link_state(link) & PN_LOCAL_CLOSED)) {
pn_link_close(link);
}
}
break;
default:
break;
}
}
void messaging_adapter::on_link_remote_open(event &e) {
proton_event *pe = dynamic_cast<proton_event*>(&e);
if (pe) {
messaging_event mevent(messaging_event::LINK_OPEN, *pe);
on_link_open(mevent);
pn_link_t *link = pn_event_link(pe->pn_event());
if (!is_local_open(pn_link_state(link)) && is_local_unititialised(pn_link_state(link))) {
pn_link_open(link);
}
}
}
void ConnectionContext::attach(pn_session_t* /*session*/, pn_link_t* link, int credit)
{
qpid::sys::ScopedLock<qpid::sys::Monitor> l(lock);
QPID_LOG(debug, "Attaching link " << link << ", state=" << pn_link_state(link));
pn_link_open(link);
QPID_LOG(debug, "Link attached " << link << ", state=" << pn_link_state(link));
if (credit) pn_link_flow(link, credit);
wakeupDriver();
while (pn_link_state(link) & PN_REMOTE_UNINIT) {
QPID_LOG(debug, "waiting for confirmation of link attach for " << link << ", state=" << pn_link_state(link));
wait();
}
}
void messaging_adapter::on_link_flow(proton_event &pe) {
pn_event_t *pne = pe.pn_event();
pn_link_t *lnk = pn_event_link(pne);
// TODO: process session flow data, if no link-specific data, just return.
if (!lnk) return;
link_context& lctx = link_context::get(lnk);
int state = pn_link_state(lnk);
if ((state&PN_LOCAL_ACTIVE) && (state&PN_REMOTE_ACTIVE)) {
if (pn_link_is_sender(lnk)) {
if (pn_link_credit(lnk) > 0) {
sender s(make_wrapper<sender>(lnk));
if (pn_link_get_drain(lnk)) {
if (!lctx.draining) {
lctx.draining = true;
delegate_.on_sender_drain_start(s);
}
}
else {
lctx.draining = false;
}
// create on_message extended event
delegate_.on_sendable(s);
}
}
else {
// receiver
if (!pn_link_credit(lnk) && lctx.draining) {
lctx.draining = false;
receiver r(make_wrapper<receiver>(lnk));
delegate_.on_receiver_drain_finish(r);
}
}
}
credit_topup(lnk);
}
void messaging_adapter::on_delivery(event &e) {
proton_event *pe = dynamic_cast<proton_event*>(&e);
if (pe) {
pn_event_t *cevent = pe->pn_event();
pn_link_t *lnk = pn_event_link(cevent);
delivery dlv = pe->delivery();
if (pn_link_is_receiver(lnk)) {
if (!dlv.partial() && dlv.readable()) {
// generate on_message
messaging_event mevent(messaging_event::MESSAGE, *pe);
pn_connection_t *pnc = pn_session_connection(pn_link_session(lnk));
connection_context& ctx = connection_context::get(pnc);
// Reusable per-connection message.
// Avoid expensive heap malloc/free overhead.
// See PROTON-998
class message &msg(ctx.event_message);
mevent.message_ = &msg;
mevent.message_->decode(lnk, dlv);
if (pn_link_state(lnk) & PN_LOCAL_CLOSED) {
if (auto_accept_)
dlv.release();
} else {
delegate_.on_message(mevent);
if (auto_accept_ && !dlv.settled())
dlv.accept();
}
}
else if (dlv.updated() && dlv.settled()) {
messaging_event mevent(messaging_event::DELIVERY_SETTLE, *pe);
delegate_.on_delivery_settle(mevent);
}
} else {
// sender
if (dlv.updated()) {
amqp_ulong rstate = dlv.remote_state();
if (rstate == PN_ACCEPTED) {
messaging_event mevent(messaging_event::DELIVERY_ACCEPT, *pe);
delegate_.on_delivery_accept(mevent);
}
else if (rstate == PN_REJECTED) {
messaging_event mevent(messaging_event::DELIVERY_REJECT, *pe);
delegate_.on_delivery_reject(mevent);
}
else if (rstate == PN_RELEASED || rstate == PN_MODIFIED) {
messaging_event mevent(messaging_event::DELIVERY_RELEASE, *pe);
delegate_.on_delivery_release(mevent);
}
if (dlv.settled()) {
messaging_event mevent(messaging_event::DELIVERY_SETTLE, *pe);
delegate_.on_delivery_settle(mevent);
}
if (auto_settle_)
dlv.settle();
}
}
}
}
void messaging_adapter::on_link_remote_open(proton_event &pe) {
pn_link_t *lnk = pn_event_link(pe.pn_event());
container& c = pe.container();
if (pn_link_is_receiver(lnk)) {
receiver r(make_wrapper<receiver>(lnk));
delegate_.on_receiver_open(r);
if (is_local_unititialised(pn_link_state(lnk))) {
r.open(c.receiver_options());
}
} else {
sender s(make_wrapper<sender>(lnk));
delegate_.on_sender_open(s);
if (is_local_unititialised(pn_link_state(lnk))) {
s.open(c.sender_options());
}
}
credit_topup(lnk);
}
void messaging_adapter::on_link_local_open(event &e) {
proton_event *pe = dynamic_cast<proton_event*>(&e);
if (pe) {
pn_link_t *link = pn_event_link(pe->pn_event());
if (is_remote_open(pn_link_state(link))) {
messaging_event mevent(messaging_event::LINK_OPENED, *pe);
on_link_opened(mevent);
}
}
}
void qd_link_close(qd_link_t *link)
{
if (link->pn_link)
pn_link_close(link->pn_link);
if (link->close_sess_with_link && link->pn_sess &&
pn_link_state(link->pn_link) == (PN_LOCAL_CLOSED | PN_REMOTE_CLOSED)) {
pn_session_close(link->pn_sess);
}
}
void messaging_adapter::on_link_remote_close(event &e) {
proton_event *pe = dynamic_cast<proton_event*>(&e);
if (pe) {
pn_event_t *cevent = pe->pn_event();
pn_link_t *lnk = pn_event_link(cevent);
pn_state_t state = pn_link_state(lnk);
if (pn_condition_is_set(pn_link_remote_condition(lnk))) {
messaging_event mevent(messaging_event::LINK_ERROR, *pe);
on_link_error(mevent);
}
else if (is_local_closed(state)) {
messaging_event mevent(messaging_event::LINK_CLOSED, *pe);
on_link_closed(mevent);
}
else {
messaging_event mevent(messaging_event::LINK_CLOSING, *pe);
on_link_closing(mevent);
}
pn_link_close(lnk);
}
}
bool link::active() const { return ::active(pn_link_state(pn_object())); }
void messaging_adapter::on_delivery(proton_event &pe) {
pn_event_t *cevent = pe.pn_event();
pn_link_t *lnk = pn_event_link(cevent);
pn_delivery_t *dlv = pn_event_delivery(cevent);
link_context& lctx = link_context::get(lnk);
if (pn_link_is_receiver(lnk)) {
delivery d(make_wrapper<delivery>(dlv));
if (!pn_delivery_partial(dlv) && pn_delivery_readable(dlv)) {
// generate on_message
pn_connection_t *pnc = pn_session_connection(pn_link_session(lnk));
connection_context& ctx = connection_context::get(pnc);
// Reusable per-connection message.
// Avoid expensive heap malloc/free overhead.
// See PROTON-998
class message &msg(ctx.event_message);
msg.decode(d);
if (pn_link_state(lnk) & PN_LOCAL_CLOSED) {
if (lctx.auto_accept)
d.release();
} else {
delegate_.on_message(d, msg);
if (lctx.auto_accept && !d.settled())
d.accept();
if (lctx.draining && !pn_link_credit(lnk)) {
lctx.draining = false;
receiver r(make_wrapper<receiver>(lnk));
delegate_.on_receiver_drain_finish(r);
}
}
}
else if (pn_delivery_updated(dlv) && d.settled()) {
delegate_.on_delivery_settle(d);
}
if (lctx.draining && pn_link_credit(lnk) == 0) {
lctx.draining = false;
pn_link_set_drain(lnk, false);
receiver r(make_wrapper<receiver>(lnk));
delegate_.on_receiver_drain_finish(r);
if (lctx.pending_credit) {
pn_link_flow(lnk, lctx.pending_credit);
lctx.pending_credit = 0;
}
}
credit_topup(lnk);
} else {
tracker t(make_wrapper<tracker>(dlv));
// sender
if (pn_delivery_updated(dlv)) {
uint64_t rstate = pn_delivery_remote_state(dlv);
if (rstate == PN_ACCEPTED) {
delegate_.on_tracker_accept(t);
}
else if (rstate == PN_REJECTED) {
delegate_.on_tracker_reject(t);
}
else if (rstate == PN_RELEASED || rstate == PN_MODIFIED) {
delegate_.on_tracker_release(t);
}
if (t.settled()) {
delegate_.on_tracker_settle(t);
}
if (lctx.auto_settle)
t.settle();
}
}
}
int pn_event_handler(void *handler_context, void *conn_context, pn_event_t *event, qd_connection_t *qd_conn)
{
qd_container_t *container = (qd_container_t*) handler_context;
pn_connection_t *conn = qd_connection_pn(qd_conn);
pn_session_t *ssn;
pn_link_t *pn_link;
qd_link_t *qd_link;
pn_delivery_t *delivery;
switch (pn_event_type(event)) {
case PN_CONNECTION_REMOTE_OPEN :
qd_connection_set_user(qd_conn);
if (pn_connection_state(conn) & PN_LOCAL_UNINIT) {
// This Open is an externally initiated connection
// Let policy engine decide
qd_connection_set_event_stall(qd_conn, true);
qd_conn->open_container = (void *)container;
qd_connection_invoke_deferred(qd_conn, qd_policy_amqp_open, qd_conn);
} else {
// This Open is in response to an internally initiated connection
notify_opened(container, qd_conn, conn_context);
}
break;
case PN_CONNECTION_REMOTE_CLOSE :
if (pn_connection_state(conn) == (PN_LOCAL_ACTIVE | PN_REMOTE_CLOSED))
pn_connection_close(conn);
break;
case PN_SESSION_REMOTE_OPEN :
if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) {
ssn = pn_event_session(event);
if (pn_session_state(ssn) & PN_LOCAL_UNINIT) {
if (qd_conn->policy_settings) {
if (!qd_policy_approve_amqp_session(ssn, qd_conn)) {
break;
}
qd_conn->n_sessions++;
}
qd_policy_apply_session_settings(ssn, qd_conn);
pn_session_open(ssn);
}
}
break;
case PN_SESSION_REMOTE_CLOSE :
if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) {
ssn = pn_event_session(event);
if (pn_session_state(ssn) == (PN_LOCAL_ACTIVE | PN_REMOTE_CLOSED)) {
// remote has nuked our session. Check for any links that were
// left open and forcibly detach them, since no detaches will
// arrive on this session.
pn_connection_t *conn = pn_session_connection(ssn);
pn_link_t *pn_link = pn_link_head(conn, PN_LOCAL_ACTIVE | PN_REMOTE_ACTIVE);
while (pn_link) {
if (pn_link_session(pn_link) == ssn) {
qd_link_t *qd_link = (qd_link_t*) pn_link_get_context(pn_link);
if (qd_link && qd_link->node) {
if (qd_conn->policy_settings) {
if (qd_link->direction == QD_OUTGOING) {
qd_conn->n_receivers--;
assert(qd_conn->n_receivers >= 0);
} else {
qd_conn->n_senders--;
assert(qd_conn->n_senders >= 0);
}
}
qd_log(container->log_source, QD_LOG_NOTICE,
"Aborting link '%s' due to parent session end",
pn_link_name(pn_link));
qd_link->node->ntype->link_detach_handler(qd_link->node->context,
qd_link, QD_LOST);
}
}
pn_link = pn_link_next(pn_link, PN_LOCAL_ACTIVE | PN_REMOTE_ACTIVE);
}
if (qd_conn->policy_settings) {
qd_conn->n_sessions--;
}
pn_session_close(ssn);
}
}
break;
case PN_LINK_REMOTE_OPEN :
if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) {
pn_link = pn_event_link(event);
if (pn_link_state(pn_link) & PN_LOCAL_UNINIT) {
if (pn_link_is_sender(pn_link)) {
if (qd_conn->policy_settings) {
if (!qd_policy_approve_amqp_receiver_link(pn_link, qd_conn)) {
break;
}
qd_conn->n_receivers++;
}
setup_outgoing_link(container, pn_link);
} else {
if (qd_conn->policy_settings) {
if (!qd_policy_approve_amqp_sender_link(pn_link, qd_conn)) {
break;
}
qd_conn->n_senders++;
}
setup_incoming_link(container, pn_link);
}
} else if (pn_link_state(pn_link) & PN_LOCAL_ACTIVE)
handle_link_open(container, pn_link);
}
break;
case PN_LINK_REMOTE_CLOSE :
case PN_LINK_REMOTE_DETACH :
if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) {
pn_link = pn_event_link(event);
qd_link = (qd_link_t*) pn_link_get_context(pn_link);
if (qd_link) {
qd_node_t *node = qd_link->node;
qd_detach_type_t dt = pn_event_type(event) == PN_LINK_REMOTE_CLOSE ? QD_CLOSED : QD_DETACHED;
if (node)
node->ntype->link_detach_handler(node->context, qd_link, dt);
else if (qd_link->pn_link == pn_link) {
pn_link_close(pn_link);
}
if (qd_conn->policy_counted && qd_conn->policy_settings) {
if (pn_link_is_sender(pn_link)) {
qd_conn->n_receivers--;
qd_log(container->log_source, QD_LOG_TRACE,
"Closed receiver link %s. n_receivers: %d",
pn_link_name(pn_link), qd_conn->n_receivers);
assert (qd_conn->n_receivers >= 0);
} else {
qd_conn->n_senders--;
qd_log(container->log_source, QD_LOG_TRACE,
"Closed sender link %s. n_senders: %d",
pn_link_name(pn_link), qd_conn->n_senders);
assert (qd_conn->n_senders >= 0);
}
}
if (qd_link->close_sess_with_link && qd_link->pn_sess &&
pn_link_state(pn_link) == (PN_LOCAL_CLOSED | PN_REMOTE_CLOSED))
pn_session_close(qd_link->pn_sess);
}
}
break;
case PN_LINK_FLOW :
pn_link = pn_event_link(event);
qd_link = (qd_link_t*) pn_link_get_context(pn_link);
if (qd_link && qd_link->node && qd_link->node->ntype->link_flow_handler)
qd_link->node->ntype->link_flow_handler(qd_link->node->context, qd_link);
break;
case PN_DELIVERY :
delivery = pn_event_delivery(event);
if (pn_delivery_readable(delivery))
do_receive(delivery);
if (pn_delivery_updated(delivery)) {
do_updated(delivery);
pn_delivery_clear(delivery);
}
break;
case PN_EVENT_NONE :
case PN_REACTOR_INIT :
case PN_REACTOR_QUIESCED :
case PN_REACTOR_FINAL :
case PN_TIMER_TASK :
case PN_CONNECTION_INIT :
case PN_CONNECTION_BOUND :
case PN_CONNECTION_UNBOUND :
case PN_CONNECTION_LOCAL_OPEN :
case PN_CONNECTION_LOCAL_CLOSE :
case PN_CONNECTION_FINAL :
case PN_SESSION_INIT :
case PN_SESSION_LOCAL_OPEN :
case PN_SESSION_LOCAL_CLOSE :
case PN_SESSION_FINAL :
case PN_LINK_INIT :
case PN_LINK_LOCAL_OPEN :
case PN_LINK_LOCAL_CLOSE :
case PN_LINK_LOCAL_DETACH :
case PN_LINK_FINAL :
case PN_TRANSPORT :
case PN_TRANSPORT_ERROR :
case PN_TRANSPORT_HEAD_CLOSED :
case PN_TRANSPORT_TAIL_CLOSED :
case PN_TRANSPORT_CLOSED :
case PN_TRANSPORT_AUTHENTICATED :
case PN_SELECTABLE_INIT :
case PN_SELECTABLE_UPDATED :
case PN_SELECTABLE_READABLE :
case PN_SELECTABLE_WRITABLE :
case PN_SELECTABLE_ERROR :
case PN_SELECTABLE_EXPIRED :
case PN_SELECTABLE_FINAL :
break;
}
return 1;
}
endpoint::state link::state() const { return pn_link_state(pn_cast(this)); }
bool link::closed() const { return ::closed(pn_link_state(pn_object())); }
bool link::uninitialized() const { return ::uninitialized(pn_link_state(pn_object())); }
/* is the link ready to send messages? */
static sbool _is_ready(pn_link_t *link)
{
return (link
&& pn_link_state(link) == (PN_LOCAL_ACTIVE | PN_REMOTE_ACTIVE)
&& pn_link_credit(link) > 0);
}
endpoint::state link::state() const {
return pn_link_state(pn_object());
}