/**
* Asks for the capabilities of all local Link SAPs.
*
* @param in The input message.
* @param out The output message.
* @return Always false, because it does not send any response directly.
*/
bool service_management::link_capability_discover_request(meta_message_ptr &in,
meta_message_ptr &out)
{
// Asks for local Link SAPs capabilities
ODTONE_LOG(1, "(mism) gathering information about local Link SAPs capabilities");
*out << mih::request(mih::request::capability_discover);
out->tid(in->tid());
out->destination(in->source());
// Check if the Link SAP is still active
uint16 fails = _link_abook.fail(out->destination().to_string());
if(fails > kConf_MIHF_Link_Delete_Value) {
mih::octet_string dst = out->destination().to_string();
_link_abook.inactive(dst);
// Update MIHF capabilities
utils::update_local_capabilities(_abook, _link_abook, _user_abook);
}
else {
ODTONE_LOG(1, "(mics) forwarding Link_Capability_Discover.request to ",
out->destination().to_string());
utils::forward_request(out, _lpool, _transmit);
}
return false;
}
/**
* Check if there's a handler for this message and call it, else
* discard message.
*
* @param in The input message.
* @param out The output message.
*/
bool sac_process_message(meta_message_ptr& in, meta_message_ptr& out)
{
// discard messages that this MIHF broadcasted to itself
// discard messages that are not destined to this MIHF or if
// multicast messages are not supported
if(in->source() == mihfid) {
ODTONE_LOG(1, "(sac) Discarding message! Reason: ",
"message was broadcasted to itself");
return false;
}
if(!utils::this_mihf_is_destination(in) && !utils::is_multicast(in)) {
ODTONE_LOG(1, "(sac) Discarding message! Reason: ",
"this is not the message destination");
return false;
}
/** __no__ authentication at this point */
uint mid = in->mid();
//
// no thread safety because insertion should __only__ be made
// on MIHF initialization
//
std::map<uint, handler_t>::iterator it;
it = _callbacks.find(mid);
if(it != _callbacks.end()) {
handler_t process_message = it->second;
bool rsp;
try {
rsp = process_message(in, out);
} catch(mih::bad_tlv) {
ODTONE_LOG(1, "Discarding malformed message.");
return false;
}
// set ip and port of response message
out->ip(in->ip());
out->scope(in->scope());
out->port(in->port());
// response message must have the same tid
out->tid(in->tid());
return rsp;
} else {
ODTONE_LOG(1, "(sac) (warning) message with mid: ", mid,
" unknown, discarding.");
}
return false;
}
/**
* Checks, in the transaction pool, if the incoming message belongs to a pending
* transaction. If true it runs the transaction, otherwise it creates a new
* transaction.
*
* @param in The input message.
*/
void message_in::operator()(meta_message_ptr& in)
{
// TODO: FIXME: check page 143 when adding support for fragment payload
if ((in->ackrsp() && (in->opcode() == mih::operation::request || in->opcode() == mih::operation::indication))
||
(!in->ackrsp() && in->opcode() == mih::operation::response)
||
(in->ackrsp() && in->opcode() == mih::operation::response && in->has_service_specific_tlv()))
{
// src
src_transaction_ptr t;
_tpool.find(in->source(), in->tid(), t);
if (t) {
t->in = in;
t->msg_in_avail = true;
if (t->start_ack_requestor)
t->ack_requestor();
if (t->start_ack_responder)
t->ack_responder();
if(t->transaction_status == ONGOING)
if(!(in->ackrsp() == true && in->opcode() == mih::operation::request))
t->run();
if (t->transaction_status != ONGOING && t->ack_requestor_status != ONGOING)
_tpool.del(t);
} else {
new_dst_transaction(in);
}
} else {
dst_transaction_ptr t;
_tpool.find(in->source(), in->tid(), t);
if (t) {
t->in = in;
t->msg_in_avail = true;
if (t->start_ack_requestor)
t->ack_requestor();
if(t->transaction_status == ONGOING)
t->run();
if (t->start_ack_responder && t->transaction_status == ONGOING)
t->ack_responder();
if (t->transaction_status != ONGOING && t->ack_requestor_status != ONGOING)
_tpool.del(t);
} else {
new_dst_transaction(in);
}
}
}
/**
* Checks, in the transaction pool, if the outgoing message belongs to a pending
* transaction. If true it runs the transaction, otherwise it creates a new
* transaction.
*
* @param out The output message.
*/
void message_out::operator()(meta_message_ptr& out)
{
out->ackreq(true); // FIXME: read from config file
if (out->opcode() == mih::operation::response) {
dst_transaction_ptr t;
dst_transaction_set::iterator it;
_tpool.find(out->destination(), out->tid(), t);
if (t) {
t->out = out;
t->msg_out_avail = true;
if (t->start_ack_requestor)
t->ack_requestor();
if (t->start_ack_responder)
t->ack_responder();
if(t->transaction_status == ONGOING)
t->run();
if (t->transaction_status != ONGOING && t->ack_requestor_status != ONGOING)
_tpool.del(t);
} else {
new_src_transaction(out);
}
} else if ((out->opcode() == mih::operation::indication) || (out->opcode() == mih::operation::request)) {
src_transaction_ptr t;
_tpool.find(out->destination(), out->tid(), t);
if (t) {
t->out = out;
t->msg_out_avail = true;
if (t->start_ack_requestor)
t->ack_requestor();
if (t->start_ack_responder)
t->ack_responder();
if(t->transaction_status == ONGOING)
t->run();
if (t->transaction_status != ONGOING && t->ack_requestor_status != ONGOING)
_tpool.del(t);
} else {
new_src_transaction(out);
}
}
}
/**
* Link Get Parameters Confirm message handler.
*
* @param in input message.
* @param out output message.
* @return true if the response is sent immediately or false otherwise.
*/
bool command_service::link_get_parameters_confirm(meta_message_ptr &in,
meta_message_ptr &out)
{
ODTONE_LOG(1, "(mics) received Link_Get_Parameters.confirm from ",
in->source().to_string());
_link_abook.reset(in->source().to_string());
if(_lpool.set_user_tid(in)) {
mih::status st;
boost::optional<mih::link_param_list> lpl;
boost::optional<mih::link_states_rsp_list> lsrl;
boost::optional<mih::link_desc_rsp_list> ldrl;
*in >> mih::confirm(mih::confirm::link_get_parameters)
& mih::tlv_status(st)
& mih::tlv_link_parameters_status_list(lpl)
& mih::tlv_link_states_rsp(lsrl)
& mih::tlv_link_descriptor_rsp(ldrl);
if(st == mih::status_success) {
mih::link_status_rsp link_status;
link_status.states_rsp_list = lsrl.get();
link_status.param_list = lpl.get();
link_status.desc_rsp_list = ldrl.get();
_lrpool.add(in->source().to_string(),
in->tid(),
link_status);
}
return false;
}
// Check if there's a handler for this message and call it, else
// discard message.
void sac_dispatch::operator()(meta_message_ptr& in)
{
/** __no__ authentication at this point */
uint mid = in->mid();
log(1, "(sac) dispatching message with mid: ", mid);
//
// no thread safety because insertion should __only__ be made
// on MIHF initialization
//
std::map<uint, handler_t>::iterator it;
it = _callbacks.find(mid);
if(it != _callbacks.end()) {
handler_t process_message = it->second;
meta_message_ptr out(new meta_message);
out->tid(in->tid());
// send response if it was generated
if (process_message(in, out))
_transmit(out);
} else {
log(1, "(sac) (warning) message with mid: ", mid,
" unknown, discarding.");
}
}
/**
* Piggyback local MIHF Capabilities in request message.
*
* @param in input message.
* @param out output message.
*/
void service_management::piggyback_capabilities(meta_message_ptr& in,
meta_message_ptr& out)
{
// Get local capabilities
address_entry mihf_cap = _abook.get(mihfid_t::instance()->to_string());
*out << mih::request(mih::request::capability_discover)
& mih::tlv_net_type_addr_list(mihf_cap.capabilities_list_net_type_addr)
& mih::tlv_event_list(mihf_cap.capabilities_event_list)
& mih::tlv_command_list(mihf_cap.capabilities_cmd_list)
& mih::tlv_query_type_list(mihf_cap.capabilities_query_type)
& mih::tlv_transport_option_list(mihf_cap.capabilities_trans_list)
& mih::tlv_mbb_ho_supp_list(mihf_cap.capabilities_mbb_ho_supp);
out->tid(in->tid());
out->source(in->source());
out->destination(in->destination());
}
/**
* Create a new source transaction for the outgoing message.
*
* @param m The output message.
*/
void message_out::new_src_transaction(meta_message_ptr& m)
{
src_transaction_ptr t(new src_transaction_t(process_message, _netsap));
_tid++;
if (_tid == 0) // don't send a message with a
_tid = 1; // transaction id of 0
_lpool.set_remote_tid(m->destination().to_string(), m->tid(), _tid);
m->tid(_tid);
t->out = m;
t->mid = m->mid();
t->msg_out_avail = true;
t->run();
if (t->transaction_status == ONGOING)
_tpool.add(t);
}
// This MIHF is the destination of the Event_Unsubscribe.request.
// Deserialize message, unsubscribe user and send a response
bool event_service::local_event_unsubscribe_request(meta_message_ptr &in,
meta_message_ptr &out)
{
mih::status st;
mih::link_tuple_id link;
mih::event_list events;
*in >> mih::request(mih::request::event_unsubscribe)
& mih::tlv_link_identifier(link)
& mih::tlv_event_list(events);
st = unsubscribe(in->source(), link, events);
*out << mih::response(mih::response::event_unsubscribe)
& mih::tlv_status(st)
& mih::tlv_link_identifier(link)
& mih::tlv_event_list(events);
out->tid(in->tid());
out->destination(in->source());
return true;
}
bool sac_process_message(meta_message_ptr& in, meta_message_ptr& out)
{
// discard messages that this MIHF broadcasted to itself
if (in->source() == mihfid)
return false;
/** __no__ authentication at this point */
uint mid = in->mid();
//
// no thread safety because insertion should __only__ be made
// on MIHF initialization
//
std::map<uint, handler_t>::iterator it;
it = _callbacks.find(mid);
if(it != _callbacks.end()) {
handler_t process_message = it->second;
bool rsp = process_message(in, out);
// set ip and port of response message
out->ip(in->ip());
out->port(in->port());
// response message must have the same tid
out->tid(in->tid());
return rsp;
} else {
log(1, "(sac) (warning) message with mid: ", mid,
" unknown, discarding.");
}
return false;
}
/**
* Check if there is a handler for this message and call it, else
* discard message.
*
* @param in The input message.
*/
void sac_dispatch::operator()(meta_message_ptr& in)
{
/** __no__ authentication at this point */
uint mid = in->mid();
ODTONE_LOG(1, "(sac) dispatching message with mid: ", mid);
//
// no thread safety because insertion should __only__ be made
// on MIHF initialization
//
std::map<uint, handler_t>::iterator it;
it = _callbacks.find(mid);
if(it != _callbacks.end()) {
handler_t process_message = it->second;
meta_message_ptr out(new meta_message);
out->tid(in->tid());
// send response if it was generated
try {
if (process_message(in, out))
_transmit(out);
} catch(mih::bad_tlv) {
ODTONE_LOG(1, "Discarding malformed message.");
} catch(unknown_link_sap) {
ODTONE_LOG(1, "Received message from an unknown Link SAP. Discarding message.");
} catch(unknown_mih_user) {
ODTONE_LOG(1, "Received message from an unknown MIH-User. Discarding message.");
}
} else {
ODTONE_LOG(1, "(sac) (warning) message with mid: ", mid,
" unknown, discarding.");
}
}
/**
* Run Acknowledge Responder State Machine transaction.
*/
void ack_responder()
{
switch(ack_rsp_state)
{
case ACK_RSP_INIT:
goto _rsp_init_lbl_;
case ACK_RSP_RETURN_ACK:
goto _rsp_return_ack_lbl_;
case ACK_RSP_PIGGYBACKING:
goto _rsp_piggybacking_lbl_;
case ACK_RSP_RETURN_DUPLICATE:
goto _rsp_return_duplicate_lbl_;
}
_rsp_init_lbl_:
{
ack->ackreq(false);
ack->ackrsp(true);
ack->opcode((mih::operation::type)opcode);
ack->tid(tid);
ack->mid(in->mid());
ack->source(my_mihf_id);
ack->destination(peer_mihf_id);
ack->ip(in->ip());
ack->port(in->port());
if (msg_out_avail)
goto _rsp_piggybacking_lbl_;
else
{
_netsap.send(ack);
msg_in_avail = false;
goto _rsp_return_ack_lbl_;
}
return;
}
_rsp_return_ack_lbl_:
{
ack_rsp_state = ACK_RSP_RETURN_ACK;
if(msg_in_avail)
{
_netsap.send(ack);
msg_in_avail = false;
}
else if (msg_out_avail)
goto _rsp_piggybacking_lbl_;
return;
}
_rsp_piggybacking_lbl_:
{
ack_rsp_state = ACK_RSP_PIGGYBACKING;
out->ackrsp(true);
dup = out;
if (msg_in_avail)
goto _rsp_return_duplicate_lbl_;
return;
}
_rsp_return_duplicate_lbl_:
{
ack_rsp_state = ACK_RSP_RETURN_DUPLICATE;
if (msg_in_avail) {
_netsap.send(dup);
msg_in_avail = false;
}
}
}
