Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2017 Juniper Networks, Inc. All rights reserved.
       3             :  */
       4             : 
       5             : #include <sandesh/sandesh_types.h>
       6             : #include <sandesh/sandesh.h>
       7             : #include <cmn/agent_cmn.h>
       8             : #include <init/agent_init.h>
       9             : #include <oper/interface.h>
      10             : #include <oper/vm_interface.h>
      11             : #include <oper/metadata_ip.h>
      12             : #include <pkt/proto_handler.h>
      13             : #include "pkt/pkt_init.h"
      14             : #include <services/bfd_proto.h>
      15             : #include <services/bfd_handler.h>
      16             : #include <services/services_types.h>
      17             : #include <services/services_init.h>
      18             : #include "base/logging.h"
      19             : 
      20           0 : BfdProto::BfdProto(Agent *agent, boost::asio::io_context &io) :
      21             :     Proto(agent, "Agent::Services", PktHandler::BFD, io),
      22           0 :     msg_(new PktInfo(agent, BFD_TX_BUFF_LEN, PktHandler::BFD, 0)),
      23           0 :     communicator_(this),
      24           0 :     server_(new BFD::Server(agent->event_manager(), &communicator_)),
      25           0 :     client_(new BFD::Client(&communicator_)), handler_(agent, msg_, io) {
      26             : 
      27             :     // limit the number of entries in the workqueue
      28           0 :     work_queue_.SetSize(agent->params()->services_queue_limit());
      29           0 :     work_queue_.SetBounded(true);
      30             : 
      31           0 :     agent->health_check_table()->RegisterHealthCheckCallback(
      32             :         boost::bind(&BfdProto::BfdHealthCheckSessionControl, this, _1, _2),
      33             :         HealthCheckService::BFD);
      34           0 : }
      35             : 
      36           0 : BfdProto::~BfdProto() {
      37           0 : }
      38             : 
      39           0 : ProtoHandler *BfdProto::AllocProtoHandler(boost::shared_ptr<PktInfo> info,
      40             :                                           boost::asio::io_context &io) {
      41           0 :     return new BfdHandler(agent(), info, io);
      42             : }
      43             : 
      44           0 : bool BfdSessionsKey::IsLess(const BfdSessionsKey &rhs) const {
      45           0 :     if (id_ != rhs.id_) {
      46           0 :         return id_ < rhs.id_;
      47             :     }
      48           0 :     return ip_ < rhs.ip_;
      49             : }
      50             : 
      51           0 : bool BfdSessionsKey::IsEqual(const BfdSessionsKey &rhs) const {
      52           0 :     if (id_ != rhs.id_) {
      53           0 :         return false;
      54             :     }
      55           0 :     if (ip_ != rhs.ip_) {
      56           0 :         return false;
      57             :     }
      58           0 :     return true;
      59             : }
      60             : 
      61           0 : bool BfdProto::BfdHealthCheckSessionControl(
      62             :                HealthCheckTable::HealthCheckServiceAction action,
      63             :                HealthCheckInstanceService *service) {
      64             : 
      65           0 :     uint16_t remote_port = service->is_multi_hop() ?
      66           0 :                            BFD::kMultiHop : BFD::kSingleHop;
      67           0 :     IpAddress source_ip = service->update_source_ip();
      68           0 :     IpAddress destination_ip = service->destination_ip();
      69           0 :     if (source_ip.is_unspecified()) {
      70           0 :         BFD_TRACE(Trace, "Ignore",
      71             :                   destination_ip.to_string(),
      72             :                   source_ip.to_string(), service->interface()->id(),
      73             :                   0, 0, 0);
      74           0 :         return false;
      75             :     }
      76             :     BFD::SessionKey key(destination_ip,
      77           0 :                         BFD::SessionIndex(service->interface()->id()),
      78             :                         remote_port,
      79           0 :                         source_ip);
      80             : 
      81           0 :     std::scoped_lock lock(mutex_);
      82           0 :     switch (action) {
      83           0 :         case HealthCheckTable::CREATE_SERVICE:
      84             :         case HealthCheckTable::UPDATE_SERVICE:
      85             :             {
      86           0 :                 if (source_ip.is_v4() &&
      87           0 :                     source_ip.to_v4() == Ip4Address(METADATA_IP_ADDR)) {
      88           0 :                     return false;
      89             :                 }
      90             : 
      91           0 :                 uint32_t tx_interval = service->service()->delay() * 1000000 +
      92           0 :                                        service->service()->delay_usecs();
      93           0 :                 if (!tx_interval) {
      94           0 :                     tx_interval = kMinTxInterval;
      95             :                 }
      96           0 :                 uint32_t rx_interval = service->service()->timeout() * 1000000 +
      97           0 :                                        service->service()->timeout_usecs();
      98           0 :                 if (!rx_interval) {
      99           0 :                     rx_interval = kMinRxInterval;
     100             :                 }
     101           0 :                 uint32_t multiplier = service->service()->max_retries();
     102           0 :                 if (!multiplier) {
     103           0 :                     multiplier = kMultiplier;
     104             :                 }
     105             : 
     106           0 :                 BFD::SessionConfig session_config;
     107           0 :                 session_config.desiredMinTxInterval =
     108           0 :                     boost::posix_time::microseconds(tx_interval);
     109           0 :                 session_config.requiredMinRxInterval =
     110           0 :                     boost::posix_time::microseconds(rx_interval);
     111           0 :                 session_config.detectionTimeMultiplier = multiplier;
     112             : 
     113           0 :                 client_->AddSession(key, session_config);
     114           0 :                 BfdSessionsKey skey(service->interface()->id(),
     115           0 :                                 service->destination_ip());
     116           0 :                 sessions_[skey] = service;
     117           0 :                 BFD_TRACE(Trace, "Add / Update",
     118             :                           destination_ip.to_string(),
     119             :                           source_ip.to_string(), service->interface()->id(),
     120             :                           tx_interval, rx_interval, multiplier);
     121           0 :                 break;
     122           0 :             }
     123             : 
     124           0 :         case HealthCheckTable::DELETE_SERVICE:
     125             :             {
     126           0 :                 client_->DeleteSession(key);
     127           0 :                 BfdSessionsKey skey(service->interface()->id(),
     128           0 :                                     service->destination_ip());
     129           0 :                 Sessions::iterator it = sessions_.find(skey);
     130           0 :                 if (it != sessions_.end()) {
     131           0 :                     sessions_.erase(it);
     132           0 :                     BFD_TRACE(Trace, "Delete",
     133             :                             destination_ip.to_string(),
     134             :                             source_ip.to_string(), service->interface()->id(),
     135             :                             0, 0, 0);
     136             :                 } else {
     137             :                     // TODO: replace log with trace
     138           0 :                     std::string str("BFD delete session ");
     139           0 :                     str += " interface-id: " + service->interface()->id();
     140           0 :                     str += " source-ip: " + source_ip.to_string();
     141           0 :                     str += " destination-ip: " + destination_ip.to_string();
     142             : 
     143           0 :                     LOG(ERROR, "Duplicate request: " << str);
     144           0 :                 }
     145           0 :                 break;
     146           0 :             }
     147             : 
     148           0 :         case HealthCheckTable::RUN_SERVICE:
     149           0 :             break;
     150             : 
     151           0 :         case HealthCheckTable::STOP_SERVICE:
     152           0 :             break;
     153             : 
     154           0 :         default:
     155           0 :             assert(0);
     156             :     }
     157             : 
     158           0 :     return true;
     159           0 : }
     160             : 
     161           0 : void BfdProto::NotifyHealthCheckInstanceService(uint32_t interface,
     162             :                                                 IpAddress address,
     163             :                                                 std::string &data) {
     164           0 :     std::scoped_lock lock(mutex_);
     165           0 :     BfdSessionsKey key(interface, address);
     166           0 :     Sessions::iterator it = sessions_.find(key);
     167           0 :     if (it == sessions_.end()) {
     168           0 :         return;
     169             :     }
     170           0 :     it->second->OnRead(data);
     171             : 
     172             :     // log the BFD up/down event
     173           0 :     std::string str("BFD session ");
     174           0 :     if (data.find("success") != std::string::npos) {
     175           0 :         str += "Up,";
     176             :     }
     177           0 :     if (data.find("failure") != std::string::npos) {
     178           0 :         str += "Down,";
     179             :     }
     180           0 :     if (it->second->service()) {
     181           0 :         str += " service-health-check: " + it->second->service()->name();
     182             :     } else {
     183           0 :         str += " service: null";
     184             :     }
     185           0 :     if (it->second->interface()) {
     186           0 :         str += " interface: " + it->second->interface()->name();
     187           0 :         if (it->second->interface()->vrf()) {
     188           0 :             str += " vrf: " + it->second->interface()->vrf()->GetName();
     189             :         } else {
     190           0 :             str += " vrf: null";
     191             :         }
     192             :     } else {
     193           0 :         str += " interface: null";
     194             :     }
     195           0 :     if (!it->second->destination_ip().is_unspecified()) {
     196           0 :         str += " destination-ip: " + it->second->destination_ip().to_string();
     197             :     } else {
     198           0 :         str += " destination-ip: null";
     199             :     }
     200           0 :     LOG(WARN, "SYS_NOTICE " << str);
     201             : 
     202           0 : }
     203             : 
     204           0 : void BfdProto::HandleReceiveSafe(
     205             :          boost::asio::const_buffer packet,
     206             :          const boost::asio::ip::udp::endpoint &local_endpoint,
     207             :          const boost::asio::ip::udp::endpoint &remote_endpoint,
     208             :          const BFD::SessionIndex &session_index,
     209             :          uint8_t len,
     210             :          boost::system::error_code ec) {
     211             : 
     212           0 :     std::scoped_lock lock(rx_mutex_);
     213           0 :     bfd_communicator().HandleReceive(
     214             :                                   packet, local_endpoint, remote_endpoint,
     215             :                                   session_index,
     216             :                                   len, ec);
     217             : 
     218           0 :     IncrementReceived();
     219           0 : }
     220             : 
     221           0 : void BfdProto::BfdCommunicator::SendPacket(
     222             :          const boost::asio::ip::udp::endpoint &local_endpoint,
     223             :          const boost::asio::ip::udp::endpoint &remote_endpoint,
     224             :          const BFD::SessionIndex &session_index,
     225             :          const boost::asio::mutable_buffer &packet, int pktSize) {
     226           0 :     bfd_proto_->handler_.SendPacket(local_endpoint, remote_endpoint,
     227           0 :                                     session_index.if_index, packet, pktSize);
     228           0 :     bfd_proto_->IncrementSent();
     229           0 : }
     230             : 
     231           0 : void BfdProto::BfdCommunicator::NotifyStateChange(const BFD::SessionKey &key,
     232             :                                                   const bool &up) {
     233           0 :     std::string data = up ? "success" : "failure";
     234           0 :     bfd_proto_->NotifyHealthCheckInstanceService(key.index.if_index,
     235           0 :                             key.remote_address ,data);
     236           0 : }
     237             : 
     238           0 : bool BfdProto::Enqueue(boost::shared_ptr<PktInfo> msg) {
     239             : 
     240           0 :     if (msg->is_bfd_keepalive) {
     241             :         // Handle BFD keepalive packets
     242           0 :         return ProcessBfdKeepAlive(msg);
     243             :     }
     244             :     // Handle BFD control packets
     245           0 :     return Proto::Enqueue(msg);
     246             : }
     247             : 
     248             : // Handle BFD packet stats
     249           0 : void BfdProto::ProcessStats(PktStatsType::Type type) {
     250           0 :     switch(type) {
     251           0 :     case PktStatsType::PKT_RX_DROP_STATS:
     252           0 :         IncrementReceiveDropCount();
     253           0 :         break;
     254           0 :     case PktStatsType::PKT_RX_ENQUEUE:
     255           0 :         IncrementKaEnqueueCount();
     256           0 :         break;
     257           0 :     default:
     258           0 :         return;
     259             :     }
     260             : }
     261             : 
     262           0 : bool BfdProto::ProcessBfdKeepAlive(boost::shared_ptr<PktInfo> msg_info) {
     263           0 :     PktHandler *pkt_handler = Agent::GetInstance()->pkt()->pkt_handler();
     264             : 
     265           0 :     BfdHandler *handler = new BfdHandler(agent(), msg_info, get_io_service());
     266           0 :     if (handler->HandleReceive())
     267           0 :         delete handler;
     268             : 
     269           0 :     return true;;
     270             : }