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bgp_attr.h
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bgp_attr.h
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#ifndef ctrlplane_bgp_attr_h
#define ctrlplane_bgp_attr_h
#include <set>
#include <vector>
#include <boost/intrusive_ptr.hpp>
#include <tbb/atomic.h>
#include "base/label_block.h"
#include "base/parse_object.h"
#include "base/util.h"
#include "bgp/bgp_aspath.h"
#include "bgp/bgp_attr_base.h"
#include "bgp/bgp_server.h"
#include "bgp/community.h"
#include "net/address.h"
#include "net/esi.h"
#include "net/rd.h"
// BGP UPDATE attributes: as-path, community, ext-community, next-hop,
// cluster-list, ...
// all information in the UPDATE except: NLRI (prefix) and label.
class BgpAttr;
class AsPathDB;
struct BgpAttrOrigin : public BgpAttribute {
static const int kSize = 1;
static const uint8_t kFlags = Transitive;
BgpAttrOrigin() : BgpAttribute(Origin, kFlags), origin(IGP) { }
BgpAttrOrigin(const BgpAttribute &rhs) : BgpAttribute(rhs), origin(IGP) { }
explicit BgpAttrOrigin(int origin) :
BgpAttribute(Origin, kFlags), origin(origin) { }
enum OriginType {
IGP = 0,
EGP = 1,
INCOMPLETE = 2
};
int origin;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrNextHop : public BgpAttribute {
static const int kSize = 4;
static const uint8_t kFlags = Transitive;
BgpAttrNextHop() : BgpAttribute(NextHop, kFlags), nexthop(0) {}
BgpAttrNextHop(const BgpAttribute &rhs) : BgpAttribute(rhs), nexthop(0) {}
explicit BgpAttrNextHop(uint32_t nexthop) :
BgpAttribute(NextHop, kFlags), nexthop(nexthop) {}
uint32_t nexthop;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrMultiExitDisc : public BgpAttribute {
static const int kSize = 4;
static const uint8_t kFlags = Optional;
BgpAttrMultiExitDisc() : BgpAttribute(MultiExitDisc, kFlags), med(0) {}
BgpAttrMultiExitDisc(const BgpAttribute &rhs) : BgpAttribute(rhs), med(0) {}
explicit BgpAttrMultiExitDisc(uint32_t med) :
BgpAttribute(MultiExitDisc, kFlags), med(med) {}
uint32_t med;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrLocalPref : public BgpAttribute {
static const int kDefault = 100;
static const int kSize = 4;
static const uint8_t kFlags = Transitive;
BgpAttrLocalPref() : BgpAttribute(LocalPref, kFlags), local_pref(0) {}
BgpAttrLocalPref(const BgpAttribute &rhs) :
BgpAttribute(rhs), local_pref(0) {}
explicit BgpAttrLocalPref(uint32_t local_pref) :
BgpAttribute(LocalPref, kFlags), local_pref(local_pref) {}
uint32_t local_pref;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrAtomicAggregate : public BgpAttribute {
static const int kSize = 0;
static const uint8_t kFlags = Transitive;
BgpAttrAtomicAggregate() : BgpAttribute(AtomicAggregate, kFlags) {}
BgpAttrAtomicAggregate(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrAggregator : public BgpAttribute {
static const int kSize = 6;
static const uint8_t kFlags = Optional|Transitive;
BgpAttrAggregator() :
BgpAttribute(Aggregator, kFlags), as_num(0), address(0) {}
BgpAttrAggregator(const BgpAttribute &rhs) :
BgpAttribute(rhs), as_num(0), address(0) {}
explicit BgpAttrAggregator(uint32_t as_num, uint32_t address) :
BgpAttribute(Aggregator, kFlags), as_num(as_num), address(address) {}
as_t as_num;
uint32_t address;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrOriginatorId : public BgpAttribute {
static const int kSize = 4;
static const uint8_t kFlags = Optional;
BgpAttrOriginatorId() : BgpAttribute(OriginatorId, kFlags), originator_id(0) {}
BgpAttrOriginatorId(const BgpAttribute &rhs)
: BgpAttribute(rhs), originator_id(0) {}
explicit BgpAttrOriginatorId(uint32_t originator_id)
: BgpAttribute(OriginatorId, kFlags), originator_id(originator_id) {}
uint32_t originator_id;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpMpNlri : public BgpAttribute {
static const int kSize = -1;
static const uint8_t kFlags = Optional;
// Always using extended length for MP NLRI
BgpMpNlri() : BgpAttribute(0, ExtendedLength|kFlags), afi(0), safi(0) {}
explicit BgpMpNlri(BgpAttribute::Code code) :
BgpAttribute(code, ExtendedLength|kFlags), afi(0), safi(0) {}
explicit BgpMpNlri(BgpAttribute::Code code, u_int16_t afi, u_int8_t safi,
std::vector<uint8_t> nh) :
BgpAttribute(code, ExtendedLength|kFlags), afi(afi), safi(safi),
nexthop(nh) {}
explicit BgpMpNlri(BgpAttribute::Code code, u_int16_t afi, u_int8_t safi) :
BgpAttribute(code, ExtendedLength|kFlags), afi(afi), safi(safi) {
nexthop.clear();
}
explicit BgpMpNlri(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
~BgpMpNlri() {
STLDeleteValues(&nlri);
}
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual size_t EncodeLength() const;
uint16_t afi;
uint8_t safi;
std::vector<uint8_t> nexthop;
std::vector<BgpProtoPrefix *> nlri;
};
struct PmsiTunnelSpec : public BgpAttribute {
enum Flags {
LeafInfoRequired = 1 << 0,
EdgeReplicationSupported = 1 << 7
};
enum Type {
NoTunnelInfo = 0,
RsvpP2mpLsp = 1,
LdpP2mpLsp = 2,
PimSsmTree = 3,
PimSmTree = 4,
BidirPimTree = 5,
IngressReplication = 6,
MldpMp2mpLsp = 7
};
static const int kSize = -1;
static const uint8_t kFlags = Optional | Transitive;
PmsiTunnelSpec();
explicit PmsiTunnelSpec(const BgpAttribute &rhs);
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
uint32_t GetLabel() const;
void SetLabel(uint32_t label);
Ip4Address GetIdentifier() const;
void SetIdentifier(Ip4Address identifier);
uint8_t tunnel_flags;
uint8_t tunnel_type;
uint32_t label;
std::vector<uint8_t> identifier;
};
class PmsiTunnel {
public:
explicit PmsiTunnel(const PmsiTunnelSpec &pmsi_spec);
const PmsiTunnelSpec &pmsi_tunnel() const { return pmsi_spec_; }
uint8_t tunnel_flags;
uint8_t tunnel_type;
uint32_t label;
Ip4Address identifier;
private:
friend void intrusive_ptr_add_ref(PmsiTunnel *pmsi_tunnel);
friend void intrusive_ptr_release(PmsiTunnel *pmsi_tunnel);
tbb::atomic<int> refcount_;
PmsiTunnelSpec pmsi_spec_;
};
inline void intrusive_ptr_add_ref(PmsiTunnel *pmsi_tunnel) {
pmsi_tunnel->refcount_.fetch_and_increment();
}
inline void intrusive_ptr_release(PmsiTunnel *pmsi_tunnel) {
int prev = pmsi_tunnel->refcount_.fetch_and_decrement();
if (prev == 1) {
delete pmsi_tunnel;
}
}
typedef boost::intrusive_ptr<PmsiTunnel> PmsiTunnelPtr;
struct EdgeDiscoverySpec : public BgpAttribute {
static const int kSize = -1;
static const uint8_t kFlags = Optional | Transitive;
EdgeDiscoverySpec();
explicit EdgeDiscoverySpec(const BgpAttribute &rhs);
explicit EdgeDiscoverySpec(const EdgeDiscoverySpec &rhs);
~EdgeDiscoverySpec();
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
virtual size_t EncodeLength() const;
struct Edge : public ParseObject {
Ip4Address GetIp4Address() const;
void SetIp4Address(Ip4Address addr);
void GetLabels(uint32_t *first_label, uint32_t *last_label) const;
void SetLabels(uint32_t first_label, uint32_t last_label);
std::vector<uint8_t> address;
std::vector<uint32_t> labels;
};
typedef std::vector<Edge *> EdgeList;
EdgeList edge_list;
};
class EdgeDiscovery {
public:
explicit EdgeDiscovery(const EdgeDiscoverySpec &edspec);
~EdgeDiscovery();
const EdgeDiscoverySpec &edge_discovery() const { return edspec_; }
struct Edge {
Edge(const EdgeDiscoverySpec::Edge *edge_spec);
Ip4Address address;
LabelBlockPtr label_block;
};
typedef std::vector<Edge *> EdgeList;
EdgeList edge_list;
private:
friend void intrusive_ptr_add_ref(EdgeDiscovery *ediscovery);
friend void intrusive_ptr_release(EdgeDiscovery *ediscovery);
tbb::atomic<int> refcount_;
EdgeDiscoverySpec edspec_;
};
inline void intrusive_ptr_add_ref(EdgeDiscovery *ediscovery) {
ediscovery->refcount_.fetch_and_increment();
}
inline void intrusive_ptr_release(EdgeDiscovery *ediscovery) {
int prev = ediscovery->refcount_.fetch_and_decrement();
if (prev == 1) {
delete ediscovery;
}
}
typedef boost::intrusive_ptr<EdgeDiscovery> EdgeDiscoveryPtr;
struct EdgeForwardingSpec : public BgpAttribute {
static const int kSize = -1;
static const uint8_t kFlags = Optional | Transitive;
EdgeForwardingSpec();
explicit EdgeForwardingSpec(const BgpAttribute &rhs);
explicit EdgeForwardingSpec(const EdgeForwardingSpec &rhs);
~EdgeForwardingSpec();
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
virtual size_t EncodeLength() const;
struct Edge : public ParseObject {
Ip4Address GetInboundIp4Address() const;
Ip4Address GetOutboundIp4Address() const;
void SetInboundIp4Address(Ip4Address addr);
void SetOutboundIp4Address(Ip4Address addr);
int address_len;
std::vector<uint8_t> inbound_address, outbound_address;
uint32_t inbound_label, outbound_label;
};
typedef std::vector<Edge *> EdgeList;
EdgeList edge_list;
};
class EdgeForwarding {
public:
explicit EdgeForwarding(const EdgeForwardingSpec &efspec);
~EdgeForwarding();
const EdgeForwardingSpec &edge_forwarding() const { return efspec_; }
struct Edge {
Edge(const EdgeForwardingSpec::Edge *edge_spec);
Ip4Address inbound_address, outbound_address;
uint32_t inbound_label, outbound_label;
};
typedef std::vector<Edge *> EdgeList;
EdgeList edge_list;
private:
friend void intrusive_ptr_add_ref(EdgeForwarding *eforwarding);
friend void intrusive_ptr_release(EdgeForwarding *eforwarding);
tbb::atomic<int> refcount_;
EdgeForwardingSpec efspec_;
};
inline void intrusive_ptr_add_ref(EdgeForwarding *eforwarding) {
eforwarding->refcount_.fetch_and_increment();
}
inline void intrusive_ptr_release(EdgeForwarding *eforwarding) {
int prev = eforwarding->refcount_.fetch_and_decrement();
if (prev == 1) {
delete eforwarding;
}
}
typedef boost::intrusive_ptr<EdgeForwarding> EdgeForwardingPtr;
struct BgpAttrLabelBlock : public BgpAttribute {
static const int kSize = 0;
BgpAttrLabelBlock() : BgpAttribute(0, BgpAttribute::LabelBlock, 0) {}
BgpAttrLabelBlock(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
BgpAttrLabelBlock(LabelBlockPtr label_block) :
BgpAttribute(0, BgpAttribute::LabelBlock, 0),
label_block(label_block) {}
LabelBlockPtr label_block;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
class BgpOListElem {
public:
BgpOListElem(Ip4Address address, uint32_t label,
std::vector<std::string> encap = std::vector<std::string>())
: address(address), label(label), encap(encap) {
}
friend std::size_t hash_value(BgpOListElem const &elem) {
size_t hash = 0;
boost::hash_combine(hash, elem.address.to_string());
boost::hash_combine(hash, elem.label);
return hash;
}
Ip4Address address;
uint32_t label;
std::vector<std::string> encap;
};
class BgpOList {
public:
BgpOList() { refcount_ = 0; }
std::vector<BgpOListElem> elements;
private:
friend void intrusive_ptr_add_ref(BgpOList *olist);
friend void intrusive_ptr_release(BgpOList *olist);
tbb::atomic<int> refcount_;
};
inline void intrusive_ptr_add_ref(BgpOList *olist) {
olist->refcount_.fetch_and_increment();
}
inline void intrusive_ptr_release(BgpOList *olist) {
int prev = olist->refcount_.fetch_and_decrement();
if (prev == 1) {
delete olist;
}
}
typedef boost::intrusive_ptr<BgpOList> BgpOListPtr;
struct BgpAttrOList : public BgpAttribute {
static const int kSize = 0;
BgpAttrOList() : BgpAttribute(0, BgpAttribute::OList, 0) {}
BgpAttrOList(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
BgpAttrOList(BgpOList *olist) :
BgpAttribute(0, BgpAttribute::OList, 0), olist(olist) {}
BgpAttrOList(BgpOListPtr olist) :
BgpAttribute(0, BgpAttribute::OList, 0), olist(olist) {}
BgpOListPtr olist;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrUnknown : public BgpAttribute {
BgpAttrUnknown() : BgpAttribute() {}
explicit BgpAttrUnknown(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
std::vector<uint8_t> value;
};
struct BgpAttrSourceRd : public BgpAttribute {
BgpAttrSourceRd() : BgpAttribute(0, SourceRd, 0) {}
BgpAttrSourceRd(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
explicit BgpAttrSourceRd(const RouteDistinguisher &source_rd) :
BgpAttribute(0, SourceRd, 0), source_rd(source_rd) {}
RouteDistinguisher source_rd;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrEsi : public BgpAttribute {
BgpAttrEsi() : BgpAttribute(0, Esi, 0) {}
BgpAttrEsi(const BgpAttribute &rhs) : BgpAttribute(rhs) {}
explicit BgpAttrEsi(const EthernetSegmentId &esi) :
BgpAttribute(0, Esi, 0), esi(esi) {}
EthernetSegmentId esi;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
struct BgpAttrParams : public BgpAttribute {
enum Flags {
EdgeReplicationNotSupported = 1 << 0
};
BgpAttrParams() : BgpAttribute(0, Params, 0), params(0) {}
BgpAttrParams(const BgpAttribute &rhs) : BgpAttribute(rhs), params(0) {}
explicit BgpAttrParams(uint64_t params) :
BgpAttribute(0, Params, 0), params(params) {}
uint64_t params;
virtual int CompareTo(const BgpAttribute &rhs_attr) const;
virtual void ToCanonical(BgpAttr *attr);
virtual std::string ToString() const;
};
typedef std::vector<BgpAttribute *> BgpAttrSpec;
// Canonicalized BGP attribute
class BgpAttr {
public:
BgpAttr();
BgpAttr(BgpAttrDB *attr_db);
BgpAttr(const BgpAttr &rhs);
BgpAttr(BgpAttrDB *attr_db, const BgpAttrSpec &spec);
virtual ~BgpAttr() { }
virtual void Remove();
int CompareTo(const BgpAttr &rhs) const;
void set_origin(BgpAttrOrigin::OriginType org) { origin_ = org; }
void set_nexthop(IpAddress nexthop) { nexthop_ = nexthop; }
void set_med(uint32_t med) { med_ = med; }
void set_local_pref(uint32_t local_pref) { local_pref_ = local_pref; }
void set_atomic_aggregate(bool ae) { atomic_aggregate_ = ae; }
void set_aggregator(as_t as_num, IpAddress address) {
aggregator_as_num_ = as_num;
aggregator_address_ = address;
}
void set_originator_id(Ip4Address originator_id) {
originator_id_ = originator_id;
}
void set_source_rd(const RouteDistinguisher &source_rd) {
source_rd_ = source_rd;
}
void set_esi(const EthernetSegmentId &esi) { esi_ = esi; }
void set_params(uint64_t params) { params_ = params; }
void set_as_path(const AsPathSpec *spec);
void set_community(CommunityPtr comm);
void set_community(const CommunitySpec *comm);
void set_ext_community(ExtCommunityPtr comm);
void set_ext_community(const ExtCommunitySpec *extcomm);
void set_pmsi_tunnel(const PmsiTunnelSpec *pmsi_spec);
void set_edge_discovery(const EdgeDiscoverySpec *edspec);
void set_edge_forwarding(const EdgeForwardingSpec *efspec);
void set_label_block(LabelBlockPtr label_block);
void set_olist(BgpOListPtr olist);
friend std::size_t hash_value(BgpAttr const &attr);
BgpAttrOrigin::OriginType origin() const { return origin_; }
const IpAddress &nexthop() const { return nexthop_; }
uint32_t med() const { return med_; }
uint32_t local_pref() const { return local_pref_; }
bool atomic_aggregate() const { return atomic_aggregate_; }
as_t aggregator_as_num() const { return aggregator_as_num_; }
uint32_t neighbor_as() const;
const IpAddress &aggregator_adderess() const { return aggregator_address_; }
const Ip4Address &originator_id() const { return originator_id_; }
const RouteDistinguisher &source_rd() const { return source_rd_; }
const EthernetSegmentId &esi() const { return esi_; }
uint64_t params() const { return params_; }
const AsPath *as_path() const { return as_path_.get(); }
int as_path_count() const { return as_path_ ? as_path_->AsCount() : 0; }
const Community *community() const { return community_.get(); }
const ExtCommunity *ext_community() const { return ext_community_.get(); }
const PmsiTunnel *pmsi_tunnel() const { return pmsi_tunnel_.get(); }
const EdgeDiscovery *edge_discovery() const { return edge_discovery_.get(); }
const EdgeForwarding *edge_forwarding() const { return edge_forwarding_.get(); }
LabelBlockPtr label_block() const { return label_block_; }
BgpOListPtr olist() const { return olist_; }
BgpAttrDB *attr_db() const { return attr_db_; }
private:
friend class BgpAttrDB;
friend int intrusive_ptr_add_ref(const BgpAttr *cattrp);
friend int intrusive_ptr_del_ref(const BgpAttr *cattrp);
friend void intrusive_ptr_release(const BgpAttr *cattrp);
mutable tbb::atomic<int> refcount_;
BgpAttrDB *attr_db_;
BgpAttrOrigin::OriginType origin_;
IpAddress nexthop_;
uint32_t med_;
uint32_t local_pref_;
bool atomic_aggregate_;
as_t aggregator_as_num_;
IpAddress aggregator_address_;
Ip4Address originator_id_;
RouteDistinguisher source_rd_;
EthernetSegmentId esi_;
uint64_t params_;
AsPathPtr as_path_;
CommunityPtr community_;
ExtCommunityPtr ext_community_;
PmsiTunnelPtr pmsi_tunnel_;
EdgeDiscoveryPtr edge_discovery_;
EdgeForwardingPtr edge_forwarding_;
LabelBlockPtr label_block_;
BgpOListPtr olist_;
};
inline int intrusive_ptr_add_ref(const BgpAttr *cattrp) {
return cattrp->refcount_.fetch_and_increment();
}
inline int intrusive_ptr_del_ref(const BgpAttr *cattrp) {
return cattrp->refcount_.fetch_and_decrement();
}
inline void intrusive_ptr_release(const BgpAttr *cattrp) {
int prev = cattrp->refcount_.fetch_and_decrement();
if (prev == 1) {
BgpAttr *attrp = const_cast<BgpAttr *>(cattrp);
attrp->Remove();
assert(attrp->refcount_ == 0);
delete attrp;
}
}
typedef boost::intrusive_ptr<const BgpAttr> BgpAttrPtr;
struct BgpAttrCompare {
bool operator()(const BgpAttr *lhs, const BgpAttr *rhs) {
return lhs->CompareTo(*rhs) < 0;
}
};
class BgpAttrDB : public BgpPathAttributeDB<BgpAttr, BgpAttrPtr, BgpAttrSpec,
BgpAttrCompare, BgpAttrDB> {
public:
BgpAttrDB(BgpServer *server);
BgpAttrPtr ReplaceCommunityAndLocate(const BgpAttr *attr,
const Community *community);
BgpAttrPtr ReplaceExtCommunityAndLocate(const BgpAttr *attr,
ExtCommunityPtr com);
BgpAttrPtr ReplaceLocalPreferenceAndLocate(const BgpAttr *attr,
uint32_t local_pref);
BgpAttrPtr ReplaceOriginatorIdAndLocate(const BgpAttr *attr,
Ip4Address originator_id);
BgpAttrPtr ReplaceSourceRdAndLocate(const BgpAttr *attr,
const RouteDistinguisher &source_rd);
BgpAttrPtr ReplaceEsiAndLocate(const BgpAttr *attr,
const EthernetSegmentId &esi);
BgpAttrPtr ReplaceOListAndLocate(const BgpAttr *attr, BgpOListPtr olist);
BgpAttrPtr ReplacePmsiTunnelAndLocate(const BgpAttr *attr,
PmsiTunnelSpec *pmsi_spec);
BgpAttrPtr UpdateNexthopAndLocate(const BgpAttr *attr, uint16_t afi,
uint8_t safi, IpAddress &addr);
BgpServer *server() { return server_; }
private:
BgpServer *server_;
};
#endif