/
bgp_xmpp_channel.cc
2868 lines (2527 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/assign/list_of.hpp>
#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_server.h"
#include "bgp/bgp_update_sender.h"
#include "bgp/bgp_xmpp_peer_close.h"
#include "bgp/inet/inet_table.h"
#include "bgp/inet6/inet6_table.h"
#include "bgp/extended-community/etree.h"
#include "bgp/extended-community/load_balance.h"
#include "bgp/extended-community/mac_mobility.h"
#include "bgp/extended-community/router_mac.h"
#include "bgp/ermvpn/ermvpn_table.h"
#include "bgp/evpn/evpn_table.h"
#include "bgp/peer_close_manager.h"
#include "bgp/peer_stats.h"
#include "bgp/security_group/security_group.h"
#include "bgp/tunnel_encap/tunnel_encap.h"
#include "bgp/bgp_xmpp_rtarget_manager.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_init.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::assign::list_of;
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;
}
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;
}
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->reach = parent_->stats_[RX].reach;
stats->unreach = parent_->stats_[RX].unreach;
stats->end_of_rib = parent_->stats_[RX].end_of_rib;
stats->total = stats->reach + stats->unreach + stats->end_of_rib;
}
virtual void GetTxRouteUpdateStats(UpdateStats *stats) const {
stats->reach = parent_->stats_[TX].reach;
stats->unreach = parent_->stats_[TX].unreach;
stats->end_of_rib = parent_->stats_[TX].end_of_rib;
stats->total = stats->reach + stats->unreach + stats->end_of_rib;
}
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) {
if (parent_->close_manager_->IsMembershipInUse())
return parent_->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,
const std::string *msg_str);
virtual bool SendUpdate(const uint8_t *msg, size_t msgsize) {
return SendUpdate(msg, msgsize, NULL);
}
virtual const string &ToString() const {
return parent_->ToString();
}
virtual bool CanUseMembershipManager() const {
return parent_->GetMembershipRequestQueueSize() == 0;
}
virtual bool IsRegistrationRequired() const { return true; }
virtual const 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 IPeerClose *peer_close() const {
return parent_->peer_close_.get();
}
void UpdateCloseRouteStats(Address::Family family, const BgpPath *old_path,
uint32_t path_flags) const {
peer_close()->UpdateRouteStats(family, old_path, path_flags);
}
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 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_;
}
virtual bool IsInGRTimerWaitState() const {
return parent_->close_manager_->IsInGRTimerWaitState();
}
void MembershipRequestCallback(BgpTable *table) {
parent_->MembershipRequestCallback(table);
}
virtual bool send_ready() const { return send_ready_; }
private:
void WriteReadyCb(const boost::system::error_code &ec) {
if (!server_) return;
BgpUpdateSender *sender = server_->update_sender();
BGP_LOG_PEER(Event, this, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_ALL,
BGP_PEER_DIR_NA, "Send ready");
sender->PeerSendReady(this);
send_ready_ = true;
// Restart EndOfRib Send timer if necessary.
parent_->ResetEndOfRibSendState();
}
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,
const string *msg_str) {
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, msg_str, 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");
// If EndOfRib Send timer is running, cancel it and reschedule it
// after socket gets unblocked.
if (parent_->eor_send_timer_ && parent_->eor_send_timer_->running())
parent_->eor_send_timer_->Cancel();
}
return send_ready_;
} else {
return false;
}
}
void BgpXmppChannel::XmppPeer::Close(bool graceful) {
send_ready_ = true;
parent_->set_peer_closed(true);
if (server_ == NULL)
return;
XmppConnection *connection =
const_cast<XmppConnection *>(parent_->channel_->connection());
if (connection && !connection->IsActiveChannel()) {
// Clear EOR state.
parent_->ClearEndOfRibState();
parent_->peer_close_->Close(graceful);
}
}
BgpXmppChannel::BgpXmppChannel(XmppChannel *channel,
BgpServer *bgp_server,
BgpXmppChannelManager *manager)
: channel_(channel),
peer_id_(xmps::BGP),
rtarget_manager_(new BgpXmppRTargetManager(this)),
bgp_server_(bgp_server),
peer_(new XmppPeer(bgp_server, this)),
peer_close_(new BgpXmppPeerClose(this)),
close_manager_(BgpObjectFactory::Create<PeerCloseManager>(
peer_close_.get())),
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),
skip_update_send_(false),
skip_update_send_cached_(false),
eor_sent_(false),
eor_receive_timer_(NULL),
eor_send_timer_(NULL),
eor_receive_timer_start_time_(0),
eor_send_timer_start_time_(0),
membership_response_worker_(
TaskScheduler::GetInstance()->GetTaskId("xmpp::StateMachine"),
channel->GetTaskInstance(),
boost::bind(&BgpXmppChannel::MembershipResponseHandler, this, _1)),
lb_mgr_(new LabelBlockManager()) {
if (bgp_server) {
eor_receive_timer_ =
TimerManager::CreateTimer(*bgp_server->ioservice(),
"EndOfRib receive timer",
TaskScheduler::GetInstance()->GetTaskId("xmpp::StateMachine"),
channel->GetTaskInstance());
eor_send_timer_ =
TimerManager::CreateTimer(*bgp_server->ioservice(),
"EndOfRib send 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(!close_manager_->IsMembershipInUse());
assert(routingtable_membership_request_map_.empty());
TimerManager::DeleteTimer(eor_receive_timer_);
TimerManager::DeleteTimer(eor_send_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;
}
const string &BgpXmppChannel::ToString() const {
return channel_->ToString();
}
const string &BgpXmppChannel::ToUVEKey() const {
if (channel_->connection()) {
return channel_->connection()->ToUVEKey();
} else {
return channel_->ToString();
}
}
string BgpXmppChannel::StateName() const {
return channel_->StateName();
}
size_t BgpXmppChannel::GetMembershipRequestQueueSize() const {
return routingtable_membership_request_map_.size();
}
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;
rtarget_manager_->RoutingInstanceCallback(it->first,
&it->second.targets);
}
}
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,
bool add_change) {
*table = NULL;
*subscribe_pending = false;
RoutingInstanceMgr *instance_mgr = bgp_server_->routing_instance_mgr();
RoutingInstance *rt_instance = instance_mgr->GetRoutingInstance(vrf_name);
if (rt_instance)
*table = rt_instance->GetTable(family);
if (rt_instance != NULL && !rt_instance->deleted()) {
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_CRITICAL(Peer(), vrf_name,
BGP_PEER_DIR_IN, 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_CRITICAL(Peer(), vrf_name,
BGP_PEER_DIR_IN, BGP_LOG_FLAG_ALL,
"Received route without subscribe");
return false;
}
}
} else {
// Bail if there's no pending subscribe. route retract can be received
// while the instance is marked for deletion.
if (GetMembershipInfo(vrf_name, instance_id)) {
*subscribe_pending = true;
} else if (add_change || !rt_instance) {
BGP_LOG_PEER_INSTANCE_CRITICAL(Peer(), vrf_name, BGP_PEER_DIR_IN,
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_WARNING(Peer(), vrf_name,
BGP_LOG_FLAG_ALL, "Invalid multicast route message received");
return false;
}
if (item.entry.nlri.af != BgpAf::IPv4) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name, 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_WARNING(Peer(), vrf_name,
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_WARNING(Peer(), vrf_name, 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_WARNING(Peer(), vrf_name, BGP_LOG_FLAG_ALL,
"Bad source address " << item.entry.nlri.source);
return false;
}
}
bool subscribe_pending;
int instance_id;
uint64_t subscription_gen_id;
BgpTable *table;
if (!VerifyMembership(vrf_name, Address::ERMVPN, &table, &instance_id,
&subscription_gen_id, &subscribe_pending, add_change)) {
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_WARNING(Peer(), vrf_name,
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_WARNING(Peer(), vrf_name, 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_WARNING(Peer(), vrf_name, BGP_LOG_FLAG_ALL,
"Bad label range " << label_range <<
" for multicast route " << mc_prefix.ToString());
return false;
}
if (!labels[0] || !labels[1] || labels[1] < labels[0]) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name,
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_WARNING(Peer(), vrf_name,
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);
// Process tunnel encapsulation list.
bool no_tunnel_encap = true;
bool no_valid_tunnel_encap = true;
for (McastTunnelEncapsulationListType::const_iterator eit =
nit->tunnel_encapsulation_list.begin();
eit != nit->tunnel_encapsulation_list.end(); ++eit) {
no_tunnel_encap = false;
TunnelEncap tun_encap(*eit);
if (tun_encap.tunnel_encap() == TunnelEncapType::UNSPEC)
continue;
no_valid_tunnel_encap = false;
ext.communities.push_back(tun_encap.GetExtCommunityValue());
}
// Mark the path as infeasible if all tunnel encaps published
// by agent are invalid.
if (!no_tunnel_encap && no_valid_tunnel_encap) {
flags = BgpPath::NoTunnelEncap;
}
if (!ext.communities.empty())
attrs.push_back(&ext);
BgpAttrPtr attr = bgp_server_->attr_db()->Locate(attrs);
req.data.reset(new ErmVpnTable::RequestData(attr, flags,
0, subscription_gen_id));
stats_[RX].reach++;
} else {
req.oper = DBRequest::DB_ENTRY_DELETE;
stats_[RX].unreach++;
}
// Defer all requests till subscribe is processed.
if (subscribe_pending) {
DBRequest *request_entry = new DBRequest();
request_entry->Swap(&req);
string table_name =
RoutingInstance::GetTableName(vrf_name, Address::ERMVPN);
defer_q_.insert(make_pair(
make_pair(vrf_name, table_name), request_entry));
return true;
}
assert(table);
BGP_LOG_PEER_INSTANCE(Peer(), vrf_name,
SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_TRACE,
"Multicast group " << item.entry.nlri.group <<
" source " << item.entry.nlri.source <<
" and label range " << label_range <<
" enqueued for " << (add_change ? "add/change" : "delete"));
table->Enqueue(&req);
return true;
}
bool BgpXmppChannel::ProcessItem(string vrf_name,
const pugi::xml_node &node, bool add_change) {
ItemType item;
item.Clear();
if (!item.XmlParse(node)) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name, BGP_LOG_FLAG_ALL,
"Invalid inet route message received");
return false;
}
if (item.entry.nlri.af != BgpAf::IPv4) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name, BGP_LOG_FLAG_ALL,
"Unsupported address family " << item.entry.nlri.af <<
" for inet route " << item.entry.nlri.address);
return false;
}
error_code error;
Ip4Prefix inet_prefix =
Ip4Prefix::FromString(item.entry.nlri.address, &error);
if (error) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name, BGP_LOG_FLAG_ALL,
"Bad inet route " << item.entry.nlri.address);
return false;
}
if (add_change && item.entry.next_hops.next_hop.empty()) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name, BGP_LOG_FLAG_ALL,
"Missing next-hops for inet route " << inet_prefix.ToString());
return false;
}
// vector<Address::Family> family_list = list_of(Address::INET)(Address::EVPN);
vector<Address::Family> family_list = list_of(Address::INET);
BOOST_FOREACH(Address::Family family, family_list) {
bool subscribe_pending;
int instance_id;
uint64_t subscription_gen_id;
BgpTable *table;
if (!VerifyMembership(vrf_name, family, &table, &instance_id,
&subscription_gen_id, &subscribe_pending, add_change)) {
channel_->Close();
return false;
}
DBRequest req;
if (family == Address::INET) {
req.key.reset(new InetTable::RequestKey(inet_prefix, peer_.get()));
} else {
EvpnPrefix evpn_prefix(RouteDistinguisher::kZeroRd, 0,
inet_prefix.addr(), inet_prefix.prefixlen());
req.key.reset(new EvpnTable::RequestKey(evpn_prefix, peer_.get()));
}
IpAddress nh_address(Ip4Address(0));
uint32_t label = 0;
uint32_t flags = 0;
ExtCommunitySpec ext;
CommunitySpec comm;
if (add_change) {
req.oper = DBRequest::DB_ENTRY_ADD_CHANGE;
BgpAttrSpec attrs;
bool first_nh = true;
BgpTable::RequestData::NextHops nexthops;
const NextHopListType &inh_list = item.entry.next_hops;
for (NextHopListType::const_iterator nit = inh_list.begin();
nit != inh_list.end(); ++nit, first_nh = false) {
BgpTable::RequestData::NextHop nexthop;
IpAddress nhop_address(Ip4Address(0));
if (!XmppDecodeAddress(nit->af, nit->address, &nhop_address)) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name,
BGP_LOG_FLAG_ALL,
"Bad nexthop address " << nit->address <<
" for inet route " << inet_prefix.ToString());
return false;
}
if (family == Address::EVPN) {
if (nit->vni > 0xFFFFFF) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name,
BGP_LOG_FLAG_ALL,
"Bad label " << nit->vni <<
" for inet route " << inet_prefix.ToString());
return false;
}
if (!nit->vni)
continue;
if (nit->mac.empty())
continue;
if (nexthops.empty()) {
MacAddress mac_addr =
MacAddress::FromString(nit->mac, &error);
if (error) {
BGP_LOG_PEER_INSTANCE_WARNING(Peer(), vrf_name,
BGP_LOG_FLAG_ALL,
"Bad next-hop mac address " << nit->mac);
return false;
}
RouterMac router_mac(mac_addr);
ext.communities.push_back(
router_mac.GetExtCommunityValue());