static void qd_io_rx_handler(void *context, qd_message_t *msg, int link_id)
{
IoAdapter *self = (IoAdapter*) context;
//
// Parse the message through the body and exit if the message is not well formed.
//
if (!qd_message_check(msg, QD_DEPTH_BODY))
return;
// This is called from non-python threads so we need to acquire the GIL to use python APIS.
qd_python_lock_state_t lock_state = qd_python_lock();
PyObject *py_msg = PyObject_CallFunction(message_type, NULL);
if (!py_msg) {
qd_error_py();
qd_python_unlock(lock_state);
return;
}
iter_to_py_attr(qd_message_field_iterator(msg, QD_FIELD_TO), py_iter_copy, py_msg, "address");
iter_to_py_attr(qd_message_field_iterator(msg, QD_FIELD_REPLY_TO), py_iter_copy, py_msg, "reply_to");
// Note: correlation ID requires _typed()
iter_to_py_attr(qd_message_field_iterator_typed(msg, QD_FIELD_CORRELATION_ID), py_iter_parse, py_msg, "correlation_id");
iter_to_py_attr(qd_message_field_iterator(msg, QD_FIELD_APPLICATION_PROPERTIES), py_iter_parse, py_msg, "properties");
iter_to_py_attr(qd_message_field_iterator(msg, QD_FIELD_BODY), py_iter_parse, py_msg, "body");
PyObject *value = PyObject_CallFunction(self->handler, "Ol", py_msg, link_id);
Py_DECREF(py_msg);
Py_XDECREF(value);
qd_error_py();
qd_python_unlock(lock_state);
}
qd_parsed_field_t *qd_message_message_annotations(qd_message_t *in_msg)
{
qd_message_pvt_t *msg = (qd_message_pvt_t*) in_msg;
qd_message_content_t *content = msg->content;
if (content->parsed_message_annotations)
return content->parsed_message_annotations;
qd_field_iterator_t *ma = qd_message_field_iterator(in_msg, QD_FIELD_MESSAGE_ANNOTATION);
if (ma == 0)
return 0;
content->parsed_message_annotations = qd_parse(ma);
if (content->parsed_message_annotations == 0 ||
!qd_parse_ok(content->parsed_message_annotations) ||
!qd_parse_is_map(content->parsed_message_annotations)) {
qd_field_iterator_free(ma);
qd_parse_free(content->parsed_message_annotations);
content->parsed_message_annotations = 0;
return 0;
}
qd_field_iterator_free(ma);
return content->parsed_message_annotations;
}
static void qd_core_agent_create_handler(qdr_core_t *core,
qd_message_t *msg,
qd_router_entity_type_t entity_type,
qd_router_operation_type_t operation_type,
qd_field_iterator_t *name_iter)
{
//
// Add the Body
//
qd_composed_field_t *out_body = qd_compose(QD_PERFORMATIVE_BODY_AMQP_VALUE, 0);
// Set the callback function.
qdr_manage_handler(core, qd_manage_response_handler);
// Call local function that creates and returns a qd_management_context_t containing the values passed in.
qd_management_context_t *ctx = qd_management_context(qd_message(), msg, out_body, 0, core, operation_type, 0);
qd_field_iterator_t *body_iter = qd_message_field_iterator(msg, QD_FIELD_BODY);
qd_parsed_field_t *in_body = qd_parse(body_iter);
qdr_manage_create(core, ctx, entity_type, name_iter, in_body, out_body);
qd_field_iterator_free(body_iter);
}
/** Copy a message field for use in log messages. Output in buffer. */
static void copy_field(qd_message_t *msg, int field, int max, char *pre, char *post,
char **begin, char *end)
{
qd_field_iterator_t* iter = qd_message_field_iterator(msg, field);
if (iter) {
aprintf(begin, end, "%s", pre);
qd_field_iterator_reset(iter);
for (int j = 0; !qd_field_iterator_end(iter) && j < max; ++j) {
char byte = qd_field_iterator_octet(iter);
quote(&byte, 1, begin, end);
}
aprintf(begin, end, "%s", post);
qd_field_iterator_free(iter);
}
}
/**
*
* Handler for the management agent.
*
*/
void qdr_management_agent_on_message(void *context, qd_message_t *msg, int unused_link_id, int unused_cost)
{
qdr_core_t *core = (qdr_core_t*) context;
qd_field_iterator_t *app_properties_iter = qd_message_field_iterator(msg, QD_FIELD_APPLICATION_PROPERTIES);
qd_router_entity_type_t entity_type = 0;
qd_router_operation_type_t operation_type = 0;
qd_field_iterator_t *identity_iter = 0;
qd_field_iterator_t *name_iter = 0;
int32_t count = 0;
int32_t offset = 0;
qd_parsed_field_t *properties_fld = qd_parse(app_properties_iter);
if (qd_can_handle_request(properties_fld, &entity_type, &operation_type, &identity_iter, &name_iter, &count, &offset)) {
switch (operation_type) {
case QD_ROUTER_OPERATION_QUERY:
qd_core_agent_query_handler(core, entity_type, operation_type, msg, &count, &offset);
break;
case QD_ROUTER_OPERATION_CREATE:
qd_core_agent_create_handler(core, msg, entity_type, operation_type, name_iter);
break;
case QD_ROUTER_OPERATION_READ:
qd_core_agent_read_handler(core, msg, entity_type, operation_type, identity_iter, name_iter);
break;
case QD_ROUTER_OPERATION_UPDATE:
qd_core_agent_update_handler(core, msg, entity_type, operation_type, identity_iter, name_iter);
break;
case QD_ROUTER_OPERATION_DELETE:
qd_core_agent_delete_handler(core, msg, entity_type, operation_type, identity_iter, name_iter);
break;
}
} else {
//
// The C management agent is not going to handle this request. Forward it off to Python.
//
qdr_send_to2(core, msg, MANAGEMENT_INTERNAL, false, false);
}
qd_field_iterator_free(app_properties_iter);
qd_parse_free(properties_fld);
}
static void qd_core_agent_query_handler(qdr_core_t *core,
qd_router_entity_type_t entity_type,
qd_router_operation_type_t operation_type,
qd_message_t *msg,
int *count,
int *offset)
{
//
// Add the Body.
//
qd_composed_field_t *field = qd_compose(QD_PERFORMATIVE_BODY_AMQP_VALUE, 0);
// Start a map in the body. Look for the end map in the callback function, qd_manage_response_handler.
qd_compose_start_map(field);
//add a "attributeNames" key
qd_compose_insert_string(field, ATTRIBUTE_NAMES);
// Call local function that creates and returns a local qd_management_context_t object containing the values passed in.
qd_management_context_t *ctx = qd_management_context(qd_message(), msg, field, 0, core, operation_type, (*count));
// Grab the attribute names from the incoming message body. The attribute names will be used later on in the response.
qd_parsed_field_t *attribute_names_parsed_field = 0;
qd_field_iterator_t *body_iter = qd_message_field_iterator(msg, QD_FIELD_BODY);
qd_parsed_field_t *body = qd_parse(body_iter);
if (body != 0 && qd_parse_is_map(body)) {
attribute_names_parsed_field = qd_parse_value_by_key(body, ATTRIBUTE_NAMES);
}
// Set the callback function.
qdr_manage_handler(core, qd_manage_response_handler);
ctx->query = qdr_manage_query(core, ctx, entity_type, attribute_names_parsed_field, field);
//Add the attribute names
qdr_query_add_attribute_names(ctx->query); //this adds a list of attribute names like ["attribute1", "attribute2", "attribute3", "attribute4",]
qd_compose_insert_string(field, results); //add a "results" key
qd_compose_start_list(field); //start the list for results
qdr_query_get_first(ctx->query, (*offset));
qd_field_iterator_free(body_iter);
qd_parse_free(body);
}
static void qd_set_properties(qd_message_t *msg,
qd_field_iterator_t **reply_to,
qd_composed_field_t **fld)
{
qd_field_iterator_t *correlation_id = qd_message_field_iterator_typed(msg, QD_FIELD_CORRELATION_ID);
// Grab the reply_to field from the incoming message. This is the address we will send the response to.
*reply_to = qd_message_field_iterator(msg, QD_FIELD_REPLY_TO);
*fld = qd_compose(QD_PERFORMATIVE_PROPERTIES, 0);
qd_compose_start_list(*fld);
qd_compose_insert_null(*fld); // message-id
qd_compose_insert_null(*fld); // user-id
qd_compose_insert_string_iterator(*fld, *reply_to); // to
qd_compose_insert_null(*fld); // subject
qd_compose_insert_null(*fld);
qd_compose_insert_typed_iterator(*fld, correlation_id);
qd_compose_end_list(*fld);
qd_field_iterator_free(correlation_id);
}
static void qd_core_agent_update_handler(qdr_core_t *core,
qd_message_t *msg,
qd_router_entity_type_t entity_type,
qd_router_operation_type_t operation_type,
qd_field_iterator_t *identity_iter,
qd_field_iterator_t *name_iter)
{
qd_composed_field_t *out_body = qd_compose(QD_PERFORMATIVE_BODY_AMQP_VALUE, 0);
// Set the callback function.
qdr_manage_handler(core, qd_manage_response_handler);
qd_management_context_t *ctx = qd_management_context(qd_message(), msg, out_body, 0, core, operation_type, 0);
qd_field_iterator_t *iter = qd_message_field_iterator(msg, QD_FIELD_BODY);
qd_parsed_field_t *in_body= qd_parse(iter);
qd_field_iterator_free(iter);
qdr_manage_update(core, ctx, entity_type, name_iter, identity_iter, in_body, out_body);
}
/**
* Inbound Delivery Handler
*/
static void AMQP_rx_handler(void* context, qd_link_t *link, pn_delivery_t *pnd)
{
qd_router_t *router = (qd_router_t*) context;
pn_link_t *pn_link = qd_link_pn(link);
qdr_link_t *rlink = (qdr_link_t*) qd_link_get_context(link);
qdr_delivery_t *delivery = 0;
qd_message_t *msg;
//
// Receive the message into a local representation. If the returned message
// pointer is NULL, we have not yet received a complete message.
//
// Note: In the link-routing case, consider cutting the message through. There's
// no reason to wait for the whole message to be received before starting to
// send it.
//
msg = qd_message_receive(pnd);
if (!msg)
return;
//
// Consume the delivery.
//
pn_link_advance(pn_link);
//
// If there's no router link, free the message and finish. It's likely that the link
// is closing.
//
if (!rlink) {
qd_message_free(msg);
return;
}
//
// Handle the link-routed case
//
if (qdr_link_is_routed(rlink)) {
pn_delivery_tag_t dtag = pn_delivery_tag(pnd);
delivery = qdr_link_deliver_to_routed_link(rlink, msg, pn_delivery_settled(pnd), (uint8_t*) dtag.start, dtag.size);
if (delivery) {
if (pn_delivery_settled(pnd))
pn_delivery_settle(pnd);
else {
pn_delivery_set_context(pnd, delivery);
qdr_delivery_set_context(delivery, pnd);
qdr_delivery_incref(delivery);
}
}
return;
}
//
// Determine if the incoming link is anonymous. If the link is addressed,
// there are some optimizations we can take advantage of.
//
bool anonymous_link = qdr_link_is_anonymous(rlink);
//
// Determine if the user of this connection is allowed to proxy the
// user_id of messages. A message user_id is proxied when the
// property value differs from the authenticated user name of the connection.
// If the user is not allowed to proxy the user_id then the message user_id
// must be blank or it must be equal to the connection user name.
//
bool check_user = false;
qd_connection_t *conn = qd_link_connection(link);
if (conn->policy_settings)
check_user = !conn->policy_settings->allowUserIdProxy;
//
// Validate the content of the delivery as an AMQP message. This is done partially, only
// to validate that we can find the fields we need to route the message.
//
// If the link is anonymous, we must validate through the message properties to find the
// 'to' field. If the link is not anonymous, we don't need the 'to' field as we will be
// using the address from the link target.
//
qd_message_depth_t validation_depth = (anonymous_link || check_user) ? QD_DEPTH_PROPERTIES : QD_DEPTH_MESSAGE_ANNOTATIONS;
bool valid_message = qd_message_check(msg, validation_depth);
if (valid_message) {
if (check_user) {
// This connection must not allow proxied user_id
qd_iterator_t *userid_iter = qd_message_field_iterator(msg, QD_FIELD_USER_ID);
if (userid_iter) {
// The user_id property has been specified
if (qd_iterator_remaining(userid_iter) > 0) {
// user_id property in message is not blank
if (!qd_iterator_equal(userid_iter, (const unsigned char *)conn->user_id)) {
// This message is rejected: attempted user proxy is disallowed
qd_log(router->log_source, QD_LOG_DEBUG, "Message rejected due to user_id proxy violation. User:%s", conn->user_id);
pn_link_flow(pn_link, 1);
pn_delivery_update(pnd, PN_REJECTED);
pn_delivery_settle(pnd);
qd_message_free(msg);
qd_iterator_free(userid_iter);
return;
}
}
qd_iterator_free(userid_iter);
}
}
qd_parsed_field_t *in_ma = qd_message_message_annotations(msg);
qd_bitmask_t *link_exclusions;
bool strip = qdr_link_strip_annotations_in(rlink);
qd_iterator_t *ingress_iter = router_annotate_message(router, in_ma, msg, &link_exclusions, strip);
if (anonymous_link) {
qd_iterator_t *addr_iter = 0;
int phase = 0;
//
// If the message has delivery annotations, get the to-override field from the annotations.
//
if (in_ma) {
qd_parsed_field_t *ma_to = qd_parse_value_by_key(in_ma, QD_MA_TO);
if (ma_to) {
addr_iter = qd_iterator_dup(qd_parse_raw(ma_to));
phase = qd_message_get_phase_annotation(msg);
}
}
//
// Still no destination address? Use the TO field from the message properties.
//
if (!addr_iter)
addr_iter = qd_message_field_iterator(msg, QD_FIELD_TO);
if (addr_iter) {
qd_iterator_reset_view(addr_iter, ITER_VIEW_ADDRESS_HASH);
if (phase > 0)
qd_iterator_annotate_phase(addr_iter, '0' + (char) phase);
delivery = qdr_link_deliver_to(rlink, msg, ingress_iter, addr_iter, pn_delivery_settled(pnd),
link_exclusions);
}
} else {
const char *term_addr = pn_terminus_get_address(qd_link_remote_target(link));
if (!term_addr)
term_addr = pn_terminus_get_address(qd_link_source(link));
if (term_addr) {
qd_composed_field_t *to_override = qd_compose_subfield(0);
qd_compose_insert_string(to_override, term_addr);
qd_message_set_to_override_annotation(msg, to_override);
int phase = qdr_link_phase(rlink);
if (phase != 0)
qd_message_set_phase_annotation(msg, phase);
}
delivery = qdr_link_deliver(rlink, msg, ingress_iter, pn_delivery_settled(pnd), link_exclusions);
}
if (delivery) {
if (pn_delivery_settled(pnd))
pn_delivery_settle(pnd);
else {
pn_delivery_set_context(pnd, delivery);
qdr_delivery_set_context(delivery, pnd);
qdr_delivery_incref(delivery);
}
} else {
//
// The message is now and will always be unroutable because there is no address.
//
pn_link_flow(pn_link, 1);
pn_delivery_update(pnd, PN_REJECTED);
pn_delivery_settle(pnd);
qd_message_free(msg);
}
//
// Rules for delivering messages:
//
// For addressed (non-anonymous) links:
// to-override must be set (done in the core?)
// uses qdr_link_deliver to hand over to the core
//
// For anonymous links:
// If there's a to-override in the annotations, use that address
// Or, use the 'to' field in the message properties
//
} else {
//
// Message is invalid. Reject the message and don't involve the router core.
//
pn_link_flow(pn_link, 1);
pn_delivery_update(pnd, PN_REJECTED);
pn_delivery_settle(pnd);
qd_message_free(msg);
}
}