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controller_dns.cc
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controller_dns.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include "base/util.h"
#include "base/logging.h"
#include "base/connection_info.h"
#include "cmn/agent_cmn.h"
#include "controller/controller_dns.h"
#include "controller/controller_init.h"
#include "xmpp/xmpp_channel.h"
#include "pugixml/pugixml.hpp"
#include "xml/xml_pugi.h"
#include "bind/xmpp_dns_agent.h"
#include <cfg/discovery_agent.h>
using process::ConnectionState;
using process::ConnectionType;
using process::ConnectionStatus;
AgentDnsXmppChannel::DnsMessageHandler AgentDnsXmppChannel::dns_message_handler_cb_;
AgentDnsXmppChannel::DnsXmppEventHandler AgentDnsXmppChannel::dns_xmpp_event_handler_cb_;
AgentDnsXmppChannel::AgentDnsXmppChannel(Agent *agent,
std::string xmpp_server, uint8_t xs_idx)
: channel_(NULL), xmpp_server_(xmpp_server), xs_idx_(xs_idx),
agent_(agent) {
}
AgentDnsXmppChannel::~AgentDnsXmppChannel() {
if (channel_) {
channel_->UnRegisterWriteReady(xmps::DNS);
channel_->UnRegisterReceive(xmps::DNS);
}
}
void AgentDnsXmppChannel::RegisterXmppChannel(XmppChannel *channel) {
if (channel == NULL)
return;
channel_ = channel;
channel->RegisterReceive(xmps::DNS,
boost::bind(&AgentDnsXmppChannel::ReceiveInternal, this, _1));
}
bool AgentDnsXmppChannel::SendMsg(uint8_t *msg, std::size_t len) {
if (!channel_ || channel_->GetPeerState() != xmps::READY)
return false;
return channel_->Send((const uint8_t *)msg, len, xmps::DNS,
boost::bind(&AgentDnsXmppChannel::WriteReadyCb, this, _1));
}
void AgentDnsXmppChannel::ReceiveMsg(const XmppStanza::XmppMessage *msg) {
if (msg && msg->type == XmppStanza::IQ_STANZA) {
std::auto_ptr<XmlBase> impl(XmppXmlImplFactory::Instance()->GetXmlImpl());
XmlPugi *pugi = reinterpret_cast<XmlPugi *>(impl.get());
XmlPugi *msg_pugi = reinterpret_cast<XmlPugi *>(msg->dom.get());
pugi->LoadXmlDoc(msg_pugi->doc()); //Verify Xmpp message format
boost::shared_ptr<ControllerXmppData> data(new ControllerXmppData(xmps::DNS,
xmps::UNKNOWN,
xs_idx_,
impl,
true));
agent_->controller()->Enqueue(data);
}
}
void AgentDnsXmppChannel::ReceiveInternal(const XmppStanza::XmppMessage *msg) {
ReceiveMsg(msg);
}
void AgentDnsXmppChannel::ReceiveDnsMessage(std::auto_ptr<XmlBase> impl) {
XmlPugi *pugi = reinterpret_cast<XmlPugi *>(impl.get());
pugi::xml_node node = pugi->FindNode("dns");
DnsAgentXmpp::XmppType xmpp_type;
uint32_t xid;
uint16_t code;
std::auto_ptr<DnsUpdateData> xmpp_data(new DnsUpdateData);
if (DnsAgentXmpp::DnsAgentXmppDecode(node, xmpp_type, xid,
code, xmpp_data.get())) {
if (!dns_message_handler_cb_.empty())
dns_message_handler_cb_(xmpp_data.release(), xmpp_type,
NULL, false);
}
}
std::string AgentDnsXmppChannel::ToString() const {
return channel_->ToString();
}
void AgentDnsXmppChannel::WriteReadyCb(const boost::system::error_code &ec) {
}
void AgentDnsXmppChannel::XmppClientChannelEvent(AgentDnsXmppChannel *peer,
xmps::PeerState state) {
std::auto_ptr<XmlBase> dummy_dom;
boost::shared_ptr<ControllerXmppData> data(new ControllerXmppData(xmps::DNS,
state,
peer->GetXmppServerIdx(),
dummy_dom,
false));
peer->agent()->controller()->Enqueue(data);
}
void AgentDnsXmppChannel::HandleXmppClientChannelEvent(AgentDnsXmppChannel *peer,
xmps::PeerState state) {
peer->UpdateConnectionInfo(state);
if (state == xmps::READY) {
if (!peer->dns_xmpp_event_handler_cb_.empty())
peer->dns_xmpp_event_handler_cb_(peer);
} else if (state == xmps::TIMEDOUT) {
DiscoveryAgentClient *dac = Agent::GetInstance()->discovery_client();
if (dac) {
std::vector<DSResponse> resp =
Agent::GetInstance()->GetDiscoveryServerResponseList();
std::vector<DSResponse>::iterator iter;
for (iter = resp.begin(); iter != resp.end(); iter++) {
DSResponse dr = *iter;
if (peer->GetXmppServer().compare(
dr.ep.address().to_string()) == 0) {
// Add the TIMEDOUT server to the end.
if (iter+1 == resp.end()) break;
std::rotate(iter, iter+1, resp.end());
Agent::GetInstance()->controller()->ApplyDiscoveryDnsXmppServices(resp);
break;
}
}
}
}
}
void AgentDnsXmppChannel::set_dns_message_handler_cb(DnsMessageHandler cb) {
dns_message_handler_cb_ = cb;
}
void AgentDnsXmppChannel::set_dns_xmpp_event_handler_cb(DnsXmppEventHandler cb){
dns_xmpp_event_handler_cb_ = cb;
}
void AgentDnsXmppChannel::UpdateConnectionInfo(xmps::PeerState state) {
if (agent_->connection_state() == NULL)
return;
boost::asio::ip::tcp::endpoint ep;
boost::system::error_code ec;
std::string last_state_name;
ep.address(boost::asio::ip::address::from_string(agent_->dns_server
(xs_idx_), ec));
ep.port(agent_->dns_server_port(xs_idx_));
const std::string name = agent_->xmpp_dns_server_prefix() +
ep.address().to_string();
XmppChannel *xc = GetXmppChannel();
if (xc) {
last_state_name = xc->LastStateName();
}
if (state == xmps::READY) {
agent_->connection_state()->Update(ConnectionType::XMPP, name,
ConnectionStatus::UP, ep,
last_state_name);
} else {
agent_->connection_state()->Update(ConnectionType::XMPP, name,
ConnectionStatus::DOWN, ep,
last_state_name);
}
}