/
bgp_xmpp_channel.cc
2957 lines (2599 loc) · 105 KB
/
bgp_xmpp_channel.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include "bgp/bgp_xmpp_channel.h"
#include <boost/foreach.hpp>
#include <boost/regex.hpp>
#include <limits>
#include <sstream>
#include <vector>
#include "base/task_annotations.h"
#include "bgp/bgp_config.h"
#include "bgp/bgp_factory.h"
#include "bgp/bgp_log.h"
#include "bgp/bgp_membership.h"
#include "bgp/bgp_peer_close.h"
#include "bgp/bgp_server.h"
#include "bgp/inet/inet_table.h"
#include "bgp/inet6/inet6_table.h"
#include "bgp/extended-community/load_balance.h"
#include "bgp/extended-community/mac_mobility.h"
#include "bgp/ermvpn/ermvpn_table.h"
#include "bgp/evpn/evpn_table.h"
#include "bgp/peer_stats.h"
#include "bgp/rtarget/rtarget_table.h"
#include "bgp/scheduling_group.h"
#include "bgp/security_group/security_group.h"
#include "bgp/tunnel_encap/tunnel_encap.h"
#include "control-node/sandesh/control_node_types.h"
#include "net/community_type.h"
#include "schema/xmpp_multicast_types.h"
#include "schema/xmpp_enet_types.h"
#include "xml/xml_pugi.h"
#include "xmpp/xmpp_connection.h"
#include "xmpp/xmpp_server.h"
#include "xmpp/sandesh/xmpp_peer_info_types.h"
using autogen::EnetItemType;
using autogen::EnetNextHopListType;
using autogen::EnetSecurityGroupListType;
using autogen::EnetTunnelEncapsulationListType;
using autogen::McastItemType;
using autogen::McastNextHopsType;
using autogen::McastTunnelEncapsulationListType;
using autogen::ItemType;
using autogen::NextHopListType;
using autogen::SecurityGroupListType;
using autogen::CommunityTagListType;
using autogen::TunnelEncapsulationListType;
using boost::regex;
using boost::regex_search;
using boost::smatch;
using boost::system::error_code;
using pugi::xml_node;
using std::auto_ptr;
using std::make_pair;
using std::numeric_limits;
using std::ostringstream;
using std::pair;
using std::set;
using std::string;
using std::vector;
//
// Calculate med from local preference.
// Should move agent definitions to a common location and use those here
// instead of hard coded values.
//
static uint32_t GetMedFromLocalPref(uint32_t local_pref) {
if (local_pref == 0)
return 0;
if (local_pref == 100)
return 200;
if (local_pref == 200)
return 100;
return numeric_limits<uint32_t>::max() - local_pref;
}
BgpXmppChannel::ErrorStats::ErrorStats()
: inet6_rx_bad_xml_token_count(0), inet6_rx_bad_prefix_count(0),
inet6_rx_bad_nexthop_count(0), inet6_rx_bad_afi_safi_count(0) {
}
void BgpXmppChannel::ErrorStats::incr_inet6_rx_bad_xml_token_count() {
++inet6_rx_bad_xml_token_count;
}
void BgpXmppChannel::ErrorStats::incr_inet6_rx_bad_prefix_count() {
++inet6_rx_bad_prefix_count;
}
void BgpXmppChannel::ErrorStats::incr_inet6_rx_bad_nexthop_count() {
++inet6_rx_bad_nexthop_count;
}
void BgpXmppChannel::ErrorStats::incr_inet6_rx_bad_afi_safi_count() {
++inet6_rx_bad_afi_safi_count;
}
uint64_t BgpXmppChannel::ErrorStats::get_inet6_rx_bad_xml_token_count() const {
return inet6_rx_bad_xml_token_count;
}
uint64_t BgpXmppChannel::ErrorStats::get_inet6_rx_bad_prefix_count() const {
return inet6_rx_bad_prefix_count;
}
uint64_t BgpXmppChannel::ErrorStats::get_inet6_rx_bad_nexthop_count() const {
return inet6_rx_bad_nexthop_count;
}
uint64_t BgpXmppChannel::ErrorStats::get_inet6_rx_bad_afi_safi_count() const {
return inet6_rx_bad_afi_safi_count;
}
BgpXmppChannel::Stats::Stats()
: rt_updates(0), reach(0), unreach(0) {
}
BgpXmppChannel::ChannelStats::ChannelStats()
: instance_subscribe(0),
instance_unsubscribe(0),
table_subscribe(0),
table_subscribe_complete(0),
table_unsubscribe(0),
table_unsubscribe_complete(0) {
}
class BgpXmppChannel::PeerClose : public IPeerClose {
public:
explicit PeerClose(BgpXmppChannel *channel)
: parent_(channel),
manager_(BgpObjectFactory::Create<PeerCloseManager>(this)) {
}
virtual ~PeerClose() { }
virtual bool IsReady() const { return parent_->Peer()->IsReady(); }
virtual IPeer *peer() const { return parent_->Peer(); }
virtual string ToString() const {
return parent_ ? parent_->ToString() : "";
}
virtual PeerCloseManager *close_manager() {
return manager_.get();
}
virtual const int GetGracefulRestartTime() const {
if (!parent_)
return 0;
return parent_->manager()->xmpp_server()->GetGracefulRestartTime();
}
virtual const int GetLongLivedGracefulRestartTime() const {
if (!parent_)
return 0;
return parent_->manager()->xmpp_server()->
GetLongLivedGracefulRestartTime();
}
// Mark all current subscription as 'stale'
// Concurrency: Protected with a mutex from peer close manager
virtual void GracefulRestartStale() {
if (parent_)
parent_->StaleCurrentSubscriptions();
}
// Mark all current subscriptions as 'llgr_stale'
// Concurrency: Protected with a mutex from peer close manager
virtual void LongLivedGracefulRestartStale() {
if (parent_)
parent_->LlgrStaleCurrentSubscriptions();
}
// Delete all current subscriptions which are still stale.
// Concurrency: Protected with a mutex from peer close manager
virtual void GracefulRestartSweep() {
if (parent_)
parent_->SweepCurrentSubscriptions();
}
virtual bool IsCloseGraceful() const {
if (!parent_ || !parent_->channel_)
return false;
XmppConnection *connection =
const_cast<XmppConnection *>(parent_->channel_->connection());
if (!connection || connection->IsActiveChannel())
return false;
return parent_->manager()->xmpp_server()->IsPeerCloseGraceful();
}
virtual bool IsCloseLongLivedGraceful() const {
return IsCloseGraceful() && GetLongLivedGracefulRestartTime() != 0;
}
// EoR from xmpp is afi independent at the moment.
virtual void GetGracefulRestartFamilies(Families *families) const {
families->insert(Address::UNSPEC);
}
virtual void ReceiveEndOfRIB(Address::Family family) {
parent_->ReceiveEndOfRIB(family);
}
// Process any pending subscriptions if close manager is now no longer
// using membership manager.
virtual void MembershipRequestCallbackComplete() {
CHECK_CONCURRENCY("xmpp::StateMachine");
if (parent_) {
assert(parent_->membership_unavailable());
parent_->ProcessPendingSubscriptions();
}
}
virtual const char *GetTaskName() const { return "xmpp::StateMachine"; };
virtual int GetTaskInstance() const {
return parent_->channel()->GetTaskInstance();
}
virtual void CustomClose() {
if (!parent_ || parent_->rtarget_routes_.empty())
return;
BgpServer *server = parent_->bgp_server_;
RoutingInstanceMgr *instance_mgr = server->routing_instance_mgr();
RoutingInstance *master = instance_mgr->GetDefaultRoutingInstance();
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
for (PublishedRTargetRoutes::iterator
it = parent_->rtarget_routes_.begin();
it != parent_->rtarget_routes_.end(); it++) {
parent_->RTargetRouteOp(rtarget_table,
server->local_autonomous_system(),
it->first, NULL, false);
}
parent_->routing_instances_.clear();
parent_->rtarget_routes_.clear();
parent_->end_of_rib_timer_->Cancel();
}
virtual void CloseComplete() {
if (!parent_)
return;
parent_->set_peer_closed(false);
// Indicate to Channel that GR Closure is now complete
parent_->channel_->CloseComplete();
}
virtual void Delete() {
if (!parent_)
return;
parent_->delete_in_progress_ = true;
parent_->set_peer_closed(true);
parent_->manager_->increment_deleting_count();
parent_->manager_->Enqueue(parent_);
parent_ = NULL;
}
virtual void Close(bool non_graceful) {
if (parent_) {
assert(parent_->peer_deleted());
assert(parent_->channel_->IsCloseInProgress());
if (!IsCloseGraceful())
non_graceful = true;
manager_->Close(non_graceful);
}
}
private:
BgpXmppChannel *parent_;
auto_ptr<PeerCloseManager> manager_;
};
class BgpXmppChannel::PeerStats : public IPeerDebugStats {
public:
explicit PeerStats(BgpXmppChannel *peer)
: parent_(peer) {
}
// Used when peer flaps.
// Don't need to do anything since the BgpXmppChannel itself gets deleted.
virtual void Clear() {
}
// Printable name
virtual string ToString() const {
return parent_->ToString();
}
// Previous State of the peer
virtual string last_state() const {
return (parent_->channel_->LastStateName());
}
// Last state change occurred at
virtual string last_state_change_at() const {
return (parent_->channel_->LastStateChangeAt());
}
// Last error on this peer
virtual string last_error() const {
return "";
}
// Last Event on this peer
virtual string last_event() const {
return (parent_->channel_->LastEvent());
}
// When was the Last
virtual string last_flap() const {
return (parent_->channel_->LastFlap());
}
// Total number of flaps
virtual uint64_t num_flaps() const {
return (parent_->channel_->FlapCount());
}
virtual void GetRxProtoStats(ProtoStats *stats) const {
stats->open = parent_->channel_->rx_open();
stats->close = parent_->channel_->rx_close();
stats->keepalive = parent_->channel_->rx_keepalive();
stats->update = parent_->channel_->rx_update();
}
virtual void GetTxProtoStats(ProtoStats *stats) const {
stats->open = parent_->channel_->tx_open();
stats->close = parent_->channel_->tx_close();
stats->keepalive = parent_->channel_->tx_keepalive();
stats->update = parent_->channel_->tx_update();
}
virtual void GetRxRouteUpdateStats(UpdateStats *stats) const {
stats->total = parent_->stats_[RX].rt_updates;
stats->reach = parent_->stats_[RX].reach;
stats->unreach = parent_->stats_[RX].unreach;
}
virtual void GetTxRouteUpdateStats(UpdateStats *stats) const {
stats->total = parent_->stats_[TX].rt_updates;
stats->reach = parent_->stats_[TX].reach;
stats->unreach = parent_->stats_[TX].unreach;
}
virtual void GetRxSocketStats(IPeerDebugStats::SocketStats *stats) const {
const XmppSession *session = parent_->GetSession();
if (session) {
io::SocketStats socket_stats(session->GetSocketStats());
stats->calls = socket_stats.read_calls;
stats->bytes = socket_stats.read_bytes;
}
}
virtual void GetTxSocketStats(IPeerDebugStats::SocketStats *stats) const {
const XmppSession *session = parent_->GetSession();
if (session) {
io::SocketStats socket_stats(session->GetSocketStats());
stats->calls = socket_stats.write_calls;
stats->bytes = socket_stats.write_bytes;
stats->blocked_count = socket_stats.write_blocked;
stats->blocked_duration_usecs =
socket_stats.write_blocked_duration_usecs;
}
}
virtual void GetRxErrorStats(RxErrorStats *stats) const {
const BgpXmppChannel::ErrorStats &err_stats = parent_->error_stats();
stats->inet6_bad_xml_token_count =
err_stats.get_inet6_rx_bad_xml_token_count();
stats->inet6_bad_prefix_count =
err_stats.get_inet6_rx_bad_prefix_count();
stats->inet6_bad_nexthop_count =
err_stats.get_inet6_rx_bad_nexthop_count();
stats->inet6_bad_afi_safi_count =
err_stats.get_inet6_rx_bad_afi_safi_count();
}
virtual void GetRxRouteStats(RxRouteStats *stats) const {
stats->total_path_count = parent_->Peer()->GetTotalPathCount();
stats->primary_path_count = parent_->Peer()->GetPrimaryPathCount();
}
virtual void UpdateTxUnreachRoute(uint64_t count) {
parent_->stats_[TX].unreach += count;
}
virtual void UpdateTxReachRoute(uint64_t count) {
parent_->stats_[TX].reach += count;
}
private:
BgpXmppChannel *parent_;
};
class BgpXmppChannel::XmppPeer : public IPeer {
public:
XmppPeer(BgpServer *server, BgpXmppChannel *channel)
: server_(server),
parent_(channel),
is_closed_(false),
send_ready_(true),
closed_at_(0) {
total_path_count_ = 0;
primary_path_count_ = 0;
}
virtual ~XmppPeer() {
assert(GetTotalPathCount() == 0);
XmppPeerInfoData peer_info;
peer_info.set_name(ToUVEKey());
peer_info.set_deleted(true);
parent_->XMPPPeerInfoSend(peer_info);
PeerStatsData peer_stats_data;
peer_stats_data.set_name(ToUVEKey());
peer_stats_data.set_deleted(true);
PeerStatsUve::Send(peer_stats_data, "ObjectXmppPeerInfo");
}
virtual bool MembershipPathCallback(DBTablePartBase *tpart, BgpRoute *rt,
BgpPath *path) {
PeerCloseManager *close_manager = peer_close()->close_manager();
if (close_manager->IsMembershipInUse())
return close_manager->MembershipPathCallback(tpart, rt, path);
BgpTable *table = static_cast<BgpTable *>(tpart->parent());
return table->DeletePath(tpart, rt, path);
}
virtual bool SendUpdate(const uint8_t *msg, size_t msgsize);
virtual string ToString() const {
return parent_->ToString();
}
virtual bool CanUseMembershipManager() const {
return parent_->GetMembershipRequestQueueSize() == 0;
}
virtual bool IsRegistrationRequired() const { return true; }
virtual string ToUVEKey() const {
return parent_->ToUVEKey();
}
virtual BgpServer *server() { return server_; }
virtual BgpServer *server() const { return server_; }
virtual IPeerClose *peer_close() {
return parent_->peer_close_.get();
}
virtual IPeerDebugStats *peer_stats() {
return parent_->peer_stats_.get();
}
virtual const IPeerDebugStats *peer_stats() const {
return parent_->peer_stats_.get();
}
virtual bool IsReady() const {
return (parent_->channel_->GetPeerState() == xmps::READY);
}
virtual const string GetStateName() const {
switch (parent_->channel_->GetPeerState()) {
case xmps::UNKNOWN: return "UNKNOWN";
case xmps::READY: return "READY";
case xmps::NOT_READY: return "NOT_READY";
case xmps::TIMEDOUT: return "TIMEDOUT";
}
return "UNKNOWN";
}
virtual bool IsXmppPeer() const {
return true;
}
virtual void Close(bool non_graceful);
const bool IsDeleted() const { return is_closed_; }
void SetPeerClosed(bool closed) {
is_closed_ = closed;
if (is_closed_)
closed_at_ = UTCTimestampUsec();
}
uint64_t closed_at() const { return closed_at_; }
virtual BgpProto::BgpPeerType PeerType() const {
return BgpProto::XMPP;
}
virtual uint32_t bgp_identifier() const {
const TcpSession::Endpoint &remote = parent_->endpoint();
if (remote.address().is_v4()) {
return remote.address().to_v4().to_ulong();
}
return 0;
}
virtual void UpdateTotalPathCount(int count) const {
total_path_count_ += count;
}
virtual int GetTotalPathCount() const {
return total_path_count_;
}
virtual void UpdatePrimaryPathCount(int count) const {
primary_path_count_ += count;
}
virtual int GetPrimaryPathCount() const {
return primary_path_count_;
}
void MembershipRequestCallback(BgpTable *table) {
parent_->MembershipRequestCallback(table);
}
private:
void WriteReadyCb(const boost::system::error_code &ec) {
if (!server_) return;
SchedulingGroupManager *sg_mgr = server_->scheduling_group_manager();
BGP_LOG_PEER(Event, this, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_ALL,
BGP_PEER_DIR_NA, "Send ready");
sg_mgr->SendReady(this);
send_ready_ = true;
XmppPeerInfoData peer_info;
peer_info.set_name(ToUVEKey());
peer_info.set_send_state("in sync");
parent_->XMPPPeerInfoSend(peer_info);
}
BgpServer *server_;
BgpXmppChannel *parent_;
mutable tbb::atomic<int> total_path_count_;
mutable tbb::atomic<int> primary_path_count_;
bool is_closed_;
bool send_ready_;
uint64_t closed_at_;
};
// Skip sending updates if the destinatin matches against the pattern.
// XXX Used in test environments only
bool BgpXmppChannel::SkipUpdateSend() {
static char *skip_env_ = getenv("XMPP_SKIP_UPDATE_SEND");
if (!skip_env_)
return false;
// Use XMPP_SKIP_UPDATE_SEND as a regex pattern to match against destination
// Cache the result to avoid redundant regex evaluation
if (!skip_update_send_cached_) {
smatch matches;
skip_update_send_ = regex_search(ToString(), matches, regex(skip_env_));
skip_update_send_cached_ = true;
}
return skip_update_send_;
}
bool BgpXmppChannel::XmppPeer::SendUpdate(const uint8_t *msg, size_t msgsize) {
XmppChannel *channel = parent_->channel_;
if (channel->GetPeerState() == xmps::READY) {
parent_->stats_[TX].rt_updates++;
if (parent_->SkipUpdateSend())
return true;
send_ready_ = channel->Send(msg, msgsize, xmps::BGP,
boost::bind(&BgpXmppChannel::XmppPeer::WriteReadyCb, this, _1));
if (!send_ready_) {
BGP_LOG_PEER(Event, this, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_ALL,
BGP_PEER_DIR_NA, "Send blocked");
XmppPeerInfoData peer_info;
peer_info.set_name(ToUVEKey());
peer_info.set_send_state("not in sync");
parent_->XMPPPeerInfoSend(peer_info);
}
return send_ready_;
} else {
return false;
}
}
void BgpXmppChannel::XmppPeer::Close(bool non_graceful) {
parent_->set_peer_closed(true);
if (server_ == NULL)
return;
XmppConnection *connection =
const_cast<XmppConnection *>(parent_->channel_->connection());
if (connection && !connection->IsActiveChannel()) {
parent_->peer_close_->Close(false);
XmppPeerInfoData peer_info;
peer_info.set_name(parent_->ToUVEKey());
peer_info.set_send_state("not advertising");
parent_->XMPPPeerInfoSend(peer_info);
}
}
BgpXmppChannel::BgpXmppChannel(XmppChannel *channel, BgpServer *bgp_server,
BgpXmppChannelManager *manager)
: channel_(channel),
peer_id_(xmps::BGP),
bgp_server_(bgp_server),
peer_(new XmppPeer(bgp_server, this)),
peer_close_(new PeerClose(this)),
peer_stats_(new PeerStats(this)),
bgp_policy_(peer_->PeerType(), RibExportPolicy::XMPP, -1, 0),
manager_(manager),
delete_in_progress_(false),
deleted_(false),
defer_peer_close_(false),
membership_unavailable_(false),
skip_update_send_(false),
skip_update_send_cached_(false),
end_of_rib_timer_(NULL),
membership_response_worker_(
TaskScheduler::GetInstance()->GetTaskId("xmpp::StateMachine"),
channel->GetTaskInstance(),
boost::bind(&BgpXmppChannel::MembershipResponseHandler, this, _1)),
lb_mgr_(new LabelBlockManager()) {
if (bgp_server) {
end_of_rib_timer_ = TimerManager::CreateTimer(*bgp_server->ioservice(),
"EndOfRib timer",
TaskScheduler::GetInstance()->GetTaskId(
"xmpp::StateMachine"),
channel->GetTaskInstance());
}
channel_->RegisterReceive(peer_id_,
boost::bind(&BgpXmppChannel::ReceiveUpdate, this, _1));
BGP_LOG_PEER(Event, peer_.get(), SandeshLevel::SYS_INFO, BGP_LOG_FLAG_ALL,
BGP_PEER_DIR_NA, "Created");
}
BgpXmppChannel::~BgpXmppChannel() {
if (channel_->connection() && !channel_->connection()->IsActiveChannel()) {
CHECK_CONCURRENCY("bgp::Config");
}
if (manager_)
manager_->RemoveChannel(channel_);
if (manager_ && delete_in_progress_)
manager_->decrement_deleting_count();
STLDeleteElements(&defer_q_);
assert(peer_deleted());
assert(!peer_->peer_close()->close_manager()->IsMembershipInUse());
assert(routingtable_membership_request_map_.empty());
TimerManager::DeleteTimer(end_of_rib_timer_);
BGP_LOG_PEER(Event, peer_.get(), SandeshLevel::SYS_INFO, BGP_LOG_FLAG_ALL,
BGP_PEER_DIR_NA, "Deleted");
channel_->UnRegisterReceive(peer_id_);
}
void BgpXmppChannel::XMPPPeerInfoSend(const XmppPeerInfoData &peer_info) const {
XMPPPeerInfo::Send(peer_info);
}
const XmppSession *BgpXmppChannel::GetSession() const {
if (channel_ && channel_->connection()) {
return channel_->connection()->session();
}
return NULL;
}
string BgpXmppChannel::ToString() const {
return channel_->ToString();
}
string BgpXmppChannel::ToUVEKey() const {
if (channel_->connection()) {
return channel_->connection()->ToUVEKey();
} else {
return channel_->ToString();
}
}
string BgpXmppChannel::StateName() const {
return channel_->StateName();
}
uint32_t BgpXmppChannel::GetRTargetRouteFlag(const RouteTarget &rtarget) const {
PublishedRTargetRoutes::const_iterator rt_loc =
rtarget_routes_.find(rtarget);
if (rt_loc == rtarget_routes_.end() || rt_loc->second.empty())
return 0;
// Route is [llgr-]stale only if it is stale for all instances in the set.
uint32_t flags = BgpPath::Stale | BgpPath::LlgrStale;
BOOST_FOREACH(RoutingInstance *routing_instance, rt_loc->second) {
SubscribedRoutingInstanceList::const_iterator it =
routing_instances_.find(routing_instance);
assert(it != routing_instances_.end());
if (!it->second.IsGrStale())
flags &= ~BgpPath::Stale;
if (!it->second.IsLlgrStale())
flags &= ~BgpPath::LlgrStale;
if (!flags)
break;
}
return flags;
}
void BgpXmppChannel::RTargetRouteOp(BgpTable *rtarget_table, as4_t asn,
const RouteTarget &rtarget, BgpAttrPtr attr,
bool add_change, uint32_t flags) {
if (add_change && delete_in_progress_)
return;
DBRequest req;
RTargetPrefix rt_prefix(asn, rtarget);
req.key.reset(new RTargetTable::RequestKey(rt_prefix, Peer()));
if (add_change) {
// Find correct rtarget route flags if not already known.
if (!flags)
flags = GetRTargetRouteFlag(rtarget);
req.data.reset(new RTargetTable::RequestData(attr, flags , 0));
req.oper = DBRequest::DB_ENTRY_ADD_CHANGE;
} else {
req.oper = DBRequest::DB_ENTRY_DELETE;
}
rtarget_table->Enqueue(&req);
}
void BgpXmppChannel::ASNUpdateCallback(as_t old_asn, as_t old_local_asn) {
if (bgp_server_->local_autonomous_system() == old_local_asn)
return;
if (routing_instances_.empty())
return;
RoutingInstanceMgr *instance_mgr = bgp_server_->routing_instance_mgr();
assert(instance_mgr);
RoutingInstance *master = instance_mgr->GetDefaultRoutingInstance();
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
// Delete the route and add with new local ASN
BgpAttrPtr attr = GetRouteTargetRouteAttr();
for (PublishedRTargetRoutes::iterator it = rtarget_routes_.begin();
it != rtarget_routes_.end(); it++) {
RTargetRouteOp(rtarget_table, old_local_asn, it->first, NULL, false);
RTargetRouteOp(rtarget_table, bgp_server_->local_autonomous_system(),
it->first, attr, true);
}
}
void BgpXmppChannel::IdentifierUpdateCallback(Ip4Address old_identifier) {
if (routing_instances_.empty())
return;
RoutingInstanceMgr *instance_mgr = bgp_server_->routing_instance_mgr();
assert(instance_mgr);
RoutingInstance *master = instance_mgr->GetDefaultRoutingInstance();
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
BgpAttrPtr attr = GetRouteTargetRouteAttr();
// Update the route with new nexthop
for (PublishedRTargetRoutes::iterator it = rtarget_routes_.begin();
it != rtarget_routes_.end(); it++) {
RTargetRouteOp(rtarget_table, bgp_server_->local_autonomous_system(),
it->first, attr, true);
}
}
size_t BgpXmppChannel::GetMembershipRequestQueueSize() const {
return routingtable_membership_request_map_.size();
}
void
BgpXmppChannel::AddNewRTargetRoute(BgpTable *rtarget_table,
RoutingInstance *rtinstance,
const RouteTarget &rtarget,
BgpAttrPtr attr) {
PublishedRTargetRoutes::iterator rt_loc = rtarget_routes_.find(rtarget);
if (rt_loc == rtarget_routes_.end()) {
pair<PublishedRTargetRoutes::iterator, bool> ret =
rtarget_routes_.insert(make_pair(rtarget, RoutingInstanceList()));
rt_loc = ret.first;
// Send rtarget route ADD
RTargetRouteOp(rtarget_table,
bgp_server_->local_autonomous_system(),
rtarget, attr, true);
}
rt_loc->second.insert(rtinstance);
}
void
BgpXmppChannel::DeleteRTargetRoute(BgpTable *rtarget_table,
RoutingInstance *rtinstance,
const RouteTarget &rtarget) {
PublishedRTargetRoutes::iterator rt_loc = rtarget_routes_.find(rtarget);
assert(rt_loc != rtarget_routes_.end());
assert(rt_loc->second.erase(rtinstance));
if (rt_loc->second.empty()) {
rtarget_routes_.erase(rtarget);
// Send rtarget route DELETE
RTargetRouteOp(rtarget_table,
bgp_server_->local_autonomous_system(),
rtarget, NULL, false);
}
}
BgpAttrPtr BgpXmppChannel::GetRouteTargetRouteAttr() {
BgpAttrSpec attrs;
BgpAttrNextHop nexthop(bgp_server_->bgp_identifier());
attrs.push_back(&nexthop);
BgpAttrOrigin origin(BgpAttrOrigin::IGP);
attrs.push_back(&origin);
return bgp_server_->attr_db()->Locate(attrs);
}
void BgpXmppChannel::RoutingInstanceCallback(string vrf_name, int op) {
if (delete_in_progress_)
return;
if (vrf_name == BgpConfigManager::kMasterInstance)
return;
if (op == RoutingInstanceMgr::INSTANCE_DELETE)
return;
RoutingInstanceMgr *instance_mgr = bgp_server_->routing_instance_mgr();
assert(instance_mgr);
RoutingInstance *rt_instance = instance_mgr->GetRoutingInstance(vrf_name);
assert(rt_instance);
if (op == RoutingInstanceMgr::INSTANCE_ADD) {
VrfMembershipRequestMap::iterator it =
vrf_membership_request_map_.find(vrf_name);
if (it == vrf_membership_request_map_.end())
return;
ProcessDeferredSubscribeRequest(rt_instance, it->second);
vrf_membership_request_map_.erase(it);
} else {
SubscribedRoutingInstanceList::iterator it =
routing_instances_.find(rt_instance);
if (it == routing_instances_.end()) return;
// Prepare for route add to rtarget table
// get rtarget_table and locate the attr
RoutingInstance *master = instance_mgr->GetDefaultRoutingInstance();
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
// Import list in the routing instance
const RoutingInstance::RouteTargetList &new_list =
rt_instance->GetImportList();
// Previous route target list for which the rtarget route was added
RoutingInstance::RouteTargetList ¤t = it->second.targets;
RoutingInstance::RouteTargetList::iterator cur_next_it, cur_it;
cur_it = cur_next_it = current.begin();
RoutingInstance::RouteTargetList::const_iterator new_it =
new_list.begin();
pair<RoutingInstance::RouteTargetList::iterator, bool> r;
BgpAttrPtr attr = GetRouteTargetRouteAttr();
while (cur_it != current.end() && new_it != new_list.end()) {
if (*new_it < *cur_it) {
r = current.insert(*new_it);
assert(r.second);
AddNewRTargetRoute(rtarget_table, it->first, *new_it, attr);
new_it++;
} else if (*new_it > *cur_it) {
cur_next_it++;
DeleteRTargetRoute(rtarget_table, it->first, *cur_it);
current.erase(cur_it);
cur_it = cur_next_it;
} else {
// Update
cur_it++;
new_it++;
}
cur_next_it = cur_it;
}
for (; new_it != new_list.end(); ++new_it) {
r = current.insert(*new_it);
assert(r.second);
AddNewRTargetRoute(rtarget_table, it->first, *new_it, attr);
}
for (cur_next_it = cur_it;
cur_it != current.end();
cur_it = cur_next_it) {
cur_next_it++;
DeleteRTargetRoute(rtarget_table, it->first, *cur_it);
current.erase(cur_it);
}
}
}
IPeer *BgpXmppChannel::Peer() {
return peer_.get();
}
const IPeer *BgpXmppChannel::Peer() const {
return peer_.get();
}
TcpSession::Endpoint BgpXmppChannel::endpoint() const {
return channel_->connection()->endpoint();
}
bool BgpXmppChannel::XmppDecodeAddress(int af, const string &address,
IpAddress *addrp, bool zero_ok) {
switch (af) {
case BgpAf::IPv4:
break;
default:
return false;
}
error_code error;
*addrp = IpAddress::from_string(address, error);
if (error) {
return false;
}
if (zero_ok) {
return true;
} else {
return (addrp->to_v4().to_ulong() != 0);
}
}
//
// Return true if there's a pending request, false otherwise.
//
bool BgpXmppChannel::GetMembershipInfo(BgpTable *table,
int *instance_id, uint64_t *subscription_gen_id, RequestType *req_type) {
*instance_id = -1;
*subscription_gen_id = 0;
RoutingTableMembershipRequestMap::iterator loc =
routingtable_membership_request_map_.find(table->name());
if (loc != routingtable_membership_request_map_.end()) {
*req_type = loc->second.pending_req;
*instance_id = loc->second.instance_id;
return true;
} else {
*req_type = NONE;
BgpMembershipManager *mgr = bgp_server_->membership_mgr();
mgr->GetRegistrationInfo(peer_.get(), table,
instance_id, subscription_gen_id);
return false;
}
}
//
// Return true if there's a pending request, false otherwise.
//
bool BgpXmppChannel::GetMembershipInfo(const string &vrf_name,
int *instance_id) {
*instance_id = -1;
VrfMembershipRequestMap::iterator loc =
vrf_membership_request_map_.find(vrf_name);
if (loc != vrf_membership_request_map_.end()) {
*instance_id = loc->second;
return true;
} else {
return false;
}
}
//
// Verify that there's a subscribe or pending subscribe for the table
// corresponding to the vrf and family.
// If there's a subscribe, populate the table and instance_id.
// If there's a pending subscribe, populate the instance_id.
// The subscribe_pending parameter is set appropriately.
//
// Return true if there's a subscribe or pending subscribe, false otherwise.
//
bool BgpXmppChannel::VerifyMembership(const string &vrf_name,
Address::Family family, BgpTable **table,
int *instance_id, uint64_t *subscription_gen_id, bool *subscribe_pending) {
*table = NULL;
*subscribe_pending = false;
RoutingInstanceMgr *instance_mgr = bgp_server_->routing_instance_mgr();
RoutingInstance *rt_instance = instance_mgr->GetRoutingInstance(vrf_name);
if (rt_instance != NULL && !rt_instance->deleted()) {
*table = rt_instance->GetTable(family);
RequestType req_type;
if (GetMembershipInfo(*table, instance_id,
subscription_gen_id, &req_type)) {
// Bail if there's a pending unsubscribe.
if (req_type != SUBSCRIBE) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Received route after unsubscribe");
return false;
}
*subscribe_pending = true;
} else {
// Bail if we are not subscribed to the table.