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bgp_xmpp_channel.cc
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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 <limits>
#include <vector>
#include <sstream>
#include "base/task_annotations.h"
#include "bgp/bgp_config.h"
#include "bgp/bgp_factory.h"
#include "bgp/bgp_log.h"
#include "bgp/bgp_peer_close.h"
#include "bgp/bgp_peer_membership.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/rtarget/rtarget_table.h"
#include "bgp/scheduling_group.h"
#include "bgp/security_group/security_group.h"
#include "bgp/tunnel_encap/tunnel_encap.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::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>(channel->Peer())) {
}
virtual ~PeerClose() {
}
virtual string ToString() const {
return parent_ ? parent_->ToString() : "";
}
virtual PeerCloseManager *close_manager() {
return manager_.get();
}
// Mark all current subscription as 'stale'
// Concurrency: Protected with a mutex from peer close manager
virtual void GracefulRestartStale() {
if (parent_)
parent_->StaleCurrentSubscriptions();
}
// Delete all current sbscriptions which are still stale.
// Concurrency: Protected with a mutex from peer close manager
virtual void GracefulRestartSweep() {
if (parent_)
parent_->SweepCurrentSubscriptions();
}
virtual bool IsCloseGraceful() {
if (!parent_ || !parent_->channel_)
return false;
XmppConnection *connection =
const_cast<XmppConnection *>(parent_->channel_->connection());
if (!connection || connection->IsActiveChannel()) return false;
// Check from the server, if GR is enabled or not.
return static_cast<XmppServer *>(
connection->server())->IsPeerCloseGraceful();
}
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->GetRoutingInstance(BgpConfigManager::kMasterInstance);
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();
}
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;
}
void Close() {
if (parent_) {
assert(parent_->peer_deleted());
assert(parent_->channel_->IsCloseInProgress());
manager_->Close();
}
}
private:
BgpXmppChannel *parent_;
auto_ptr<PeerCloseManager> manager_;
};
class BgpXmppChannel::PeerStats : public IPeerDebugStats {
public:
explicit PeerStats(BgpXmppChannel *peer)
: peer_(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 peer_->ToString();
}
// Previous State of the peer
virtual string last_state() const {
return (peer_->channel_->LastStateName());
}
// Last state change occurred at
virtual string last_state_change_at() const {
return (peer_->channel_->LastStateChangeAt());
}
// Last error on this peer
virtual string last_error() const {
return "";
}
// Last Event on this peer
virtual string last_event() const {
return (peer_->channel_->LastEvent());
}
// When was the Last
virtual string last_flap() const {
return (peer_->channel_->LastFlap());
}
// Total number of flaps
virtual uint64_t num_flaps() const {
return (peer_->channel_->FlapCount());
}
virtual void GetRxProtoStats(ProtoStats *stats) const {
stats->open = peer_->channel_->rx_open();
stats->close = peer_->channel_->rx_close();
stats->keepalive = peer_->channel_->rx_keepalive();
stats->update = peer_->channel_->rx_update();
}
virtual void GetTxProtoStats(ProtoStats *stats) const {
stats->open = peer_->channel_->tx_open();
stats->close = peer_->channel_->tx_close();
stats->keepalive = peer_->channel_->tx_keepalive();
stats->update = peer_->channel_->tx_update();
}
virtual void GetRxRouteUpdateStats(UpdateStats *stats) const {
stats->total = peer_->stats_[RX].rt_updates;
stats->reach = peer_->stats_[RX].reach;
stats->unreach = peer_->stats_[RX].unreach;
}
virtual void GetTxRouteUpdateStats(UpdateStats *stats) const {
stats->total = peer_->stats_[TX].rt_updates;
stats->reach = peer_->stats_[TX].reach;
stats->unreach = peer_->stats_[TX].unreach;
}
virtual void GetRxSocketStats(IPeerDebugStats::SocketStats *stats) const {
const XmppSession *session = peer_->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 = peer_->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 = peer_->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 UpdateTxUnreachRoute(uint64_t count) {
peer_->stats_[TX].unreach += count;
}
virtual void UpdateTxReachRoute(uint64_t count) {
peer_->stats_[TX].reach += count;
}
private:
BgpXmppChannel *peer_;
};
class BgpXmppChannel::XmppPeer : public IPeer {
public:
XmppPeer(BgpServer *server, BgpXmppChannel *channel)
: server_(server),
parent_(channel),
is_closed_(false),
send_ready_(true),
closed_at_(0) {
refcount_ = 0;
primary_path_count_ = 0;
}
virtual ~XmppPeer() {
assert(GetRefCount() == 0);
}
virtual bool SendUpdate(const uint8_t *msg, size_t msgsize);
virtual string ToString() const {
return parent_->ToString();
}
virtual string ToUVEKey() const {
return parent_->ToUVEKey();
}
virtual BgpServer *server() {
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();
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 UpdateRefCount(int count) const { refcount_ += count; }
virtual tbb::atomic<int> GetRefCount() const { return refcount_; }
virtual void UpdatePrimaryPathCount(int count) const {
primary_path_count_ += count;
}
virtual int GetPrimaryPathCount() const {
return primary_path_count_;
}
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");
XMPPPeerInfo::Send(peer_info);
}
BgpServer *server_;
BgpXmppChannel *parent_;
mutable tbb::atomic<int> refcount_;
mutable tbb::atomic<int> primary_path_count_;
bool is_closed_;
bool send_ready_;
uint64_t closed_at_;
};
static bool SkipUpdateSend() {
static bool init_;
static bool skip_;
if (init_) return skip_;
skip_ = getenv("XMPP_SKIP_UPDATE_SEND") != NULL;
init_ = true;
return skip_;
}
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 (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");
XMPPPeerInfo::Send(peer_info);
}
return send_ready_;
} else {
return false;
}
}
void BgpXmppChannel::XmppPeer::Close() {
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();
}
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, 0, -1, 0),
manager_(manager),
delete_in_progress_(false),
deleted_(false),
defer_peer_close_(false),
membership_response_worker_(
TaskScheduler::GetInstance()->GetTaskId("xmpp::StateMachine"),
channel->connection()->GetIndex(),
boost::bind(&BgpXmppChannel::MembershipResponseHandler, this, _1)),
lb_mgr_(new LabelBlockManager()) {
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());
BGP_LOG_PEER(Event, peer_.get(), SandeshLevel::SYS_INFO, BGP_LOG_FLAG_ALL,
BGP_PEER_DIR_NA, "Deleted");
channel_->UnRegisterReceive(peer_id_);
}
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();
}
void BgpXmppChannel::RTargetRouteOp(BgpTable *rtarget_table, as4_t asn,
const RouteTarget &rtarget, BgpAttrPtr attr,
bool add_change) {
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) {
req.data.reset(new RTargetTable::RequestData(attr, 0, 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->GetRoutingInstance(BgpConfigManager::kMasterInstance);
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
BgpAttrSpec attrs;
BgpAttrNextHop nexthop(bgp_server_->bgp_identifier());
attrs.push_back(&nexthop);
BgpAttrOrigin origin(BgpAttrOrigin::IGP);
attrs.push_back(&origin);
BgpAttrPtr attr = bgp_server_->attr_db()->Locate(attrs);
// Delete the route and add with new local ASN
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->GetRoutingInstance(BgpConfigManager::kMasterInstance);
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
BgpAttrSpec attrs;
BgpAttrNextHop nexthop(bgp_server_->bgp_identifier());
attrs.push_back(&nexthop);
BgpAttrOrigin origin(BgpAttrOrigin::IGP);
attrs.push_back(&origin);
BgpAttrPtr attr = bgp_server_->attr_db()->Locate(attrs);
// 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);
}
}
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);
}
}
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->GetRoutingInstance(BgpConfigManager::kMasterInstance);
assert(master);
BgpTable *rtarget_table = master->GetTable(Address::RTARGET);
assert(rtarget_table);
BgpAttrSpec attrs;
BgpAttrNextHop nexthop(bgp_server_->bgp_identifier());
attrs.push_back(&nexthop);
BgpAttrOrigin origin(BgpAttrOrigin::IGP);
attrs.push_back(&origin);
BgpAttrPtr attr = bgp_server_->attr_db()->Locate(attrs);
// 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;
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, RequestType *req_type) {
*instance_id = -1;
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;
PeerRibMembershipManager *mgr = bgp_server_->membership_mgr();
*instance_id = mgr->GetRegistrationId(peer_.get(), table);
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, 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, &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.
if (*instance_id < 0) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Received route without subscribe");
return false;
}
}
} else {
// Bail if there's no pending subscribe.
if (GetMembershipInfo(vrf_name, instance_id)) {
*subscribe_pending = true;
} else {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Received route without pending subscribe");
return false;
}
}
return true;
}
bool BgpXmppChannel::ProcessMcastItem(string vrf_name,
const pugi::xml_node &node, bool add_change) {
McastItemType item;
item.Clear();
if (!item.XmlParse(node)) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Invalid multicast route message received");
return false;
}
if (item.entry.nlri.af != BgpAf::IPv4) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Unsupported address family " << item.entry.nlri.af <<
" for multicast route");
return false;
}
if (item.entry.nlri.safi != BgpAf::Mcast) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name, SandeshLevel::SYS_WARN,
BGP_LOG_FLAG_ALL, "Unsupported subsequent address family " <<
item.entry.nlri.safi << " for multicast route");
return false;
}
error_code error;
IpAddress grp_address = IpAddress::from_string("0.0.0.0", error);
if (!item.entry.nlri.group.empty()) {
if (!XmppDecodeAddress(item.entry.nlri.af,
item.entry.nlri.group, &grp_address, false)) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Bad group address " << item.entry.nlri.group);
return false;
}
}
IpAddress src_address = IpAddress::from_string("0.0.0.0", error);
if (!item.entry.nlri.source.empty()) {
if (!XmppDecodeAddress(item.entry.nlri.af,
item.entry.nlri.source, &src_address, true)) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Bad source address " << item.entry.nlri.source);
return false;
}
}
bool subscribe_pending;
int instance_id;
BgpTable *table;
if (!VerifyMembership(vrf_name, Address::ERMVPN, &table, &instance_id,
&subscribe_pending)) {
channel_->Close();
return false;
}
// Build the key to the Multicast DBTable
RouteDistinguisher mc_rd(peer_->bgp_identifier(), instance_id);
ErmVpnPrefix mc_prefix(ErmVpnPrefix::NativeRoute, mc_rd,
grp_address.to_v4(), src_address.to_v4());
// Build and enqueue a DB request for route-addition
DBRequest req;
req.key.reset(new ErmVpnTable::RequestKey(mc_prefix, peer_.get()));
uint32_t flags = 0;
ExtCommunitySpec ext;
string label_range("none");
if (add_change) {
req.oper = DBRequest::DB_ENTRY_ADD_CHANGE;
vector<uint32_t> labels;
const McastNextHopsType &inh_list = item.entry.next_hops;
if (inh_list.next_hop.empty()) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Missing next-hop for multicast route " <<
mc_prefix.ToString());
return false;
}
// Agents should send only one next-hop in the item
if (inh_list.next_hop.size() != 1) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"More than one nexthop received for multicast route " <<
mc_prefix.ToString());
return false;
}
McastNextHopsType::const_iterator nit = inh_list.begin();
// Label Allocation item.entry.label by parsing the range
label_range = nit->label;
if (!stringToIntegerList(label_range, "-", labels) ||
labels.size() != 2) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Bad label range " << label_range <<
" for multicast route " << mc_prefix.ToString());
return false;
}
BgpAttrSpec attrs;
LabelBlockPtr lbptr = lb_mgr_->LocateBlock(labels[0], labels[1]);
BgpAttrLabelBlock attr_label(lbptr);
attrs.push_back(&attr_label);
// Next-hop ip address
IpAddress nh_address;
if (!XmppDecodeAddress(nit->af, nit->address, &nh_address)) {
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_WARN, BGP_LOG_FLAG_ALL,
"Bad nexthop address " << nit->address <<
" for multicast route " << mc_prefix.ToString());
return false;
}
BgpAttrNextHop nexthop(nh_address.to_v4().to_ulong());
attrs.push_back(&nexthop);