diff options
author | Serguei Bezverkhi <sbezverk@cisco.com> | 2020-05-05 23:22:09 -0400 |
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committer | Serguei Bezverkhi <sbezverk@cisco.com> | 2020-05-05 23:22:09 -0400 |
commit | a9232e356c40e4bad2ae0553fb427d4bafc43a69 (patch) | |
tree | 330350cc3e9ba6edc92d401462d632f82b578303 /pkg | |
parent | e3001f9fe1568f7c39a0c5963630fe38866ec8e1 (diff) |
add object definitions
Signed-off-by: Serguei Bezverkhi <sbezverk@cisco.com>
Diffstat (limited to 'pkg')
-rw-r--r-- | pkg/packet/bgp/prefix_sid.go | 276 |
1 files changed, 137 insertions, 139 deletions
diff --git a/pkg/packet/bgp/prefix_sid.go b/pkg/packet/bgp/prefix_sid.go index c9628797..b19fcecd 100644 --- a/pkg/packet/bgp/prefix_sid.go +++ b/pkg/packet/bgp/prefix_sid.go @@ -9,6 +9,7 @@ import ( "github.com/golang/glog" ) +// PrefixSIDTLVInterface defines standard set of methods to handle Prefix SID attribute's TLVs type PrefixSIDTLVInterface interface { Len() int DecodeFromBytes([]byte) error @@ -22,7 +23,7 @@ type PathAttributePrefixSID struct { TLVs []PrefixSIDTLVInterface } -type PrefixSIDTLVType uint16 +type PrefixSIDTLVType uint8 type PrefixSIDTLV struct { Type PrefixSIDTLVType @@ -61,89 +62,94 @@ func (s *PrefixSIDTLV) DecodeFromBytes(data []byte) ([]byte, error) { } type PrefixSIDAttribute struct { - TLVs map[PrefixSIDTLVType]PrefixSIDTLVInterface + TLVs []PrefixSIDTLVInterface } func (p *PathAttributePrefixSID) Extract() *PrefixSIDAttribute { - s := &PrefixSIDAttribute{} + s := &PrefixSIDAttribute{ + TLVs: make([]PrefixSIDTLVInterface, 0), + } - // for _, tlv := range p.TLVs { - // switch v := tlv.(type) { - // case *LsTLVNodeFlagBits: - // l.Node.Flags = v.Extract() + for _, tlv := range p.TLVs { + switch v := tlv.(type) { + case *PrefixSIDType5: + glog.Infof("><SB> v: %+v", v) + o := &PrefixSIDType5{} + s.TLVs = append(s.TLVs, o) + // l.Node.Flags = v.Extract() - // case *LsTLVOpaqueNodeAttr: - // l.Node.Opaque = &v.Attr + // case *LsTLVOpaqueNodeAttr: + // l.Node.Opaque = &v.Attr - // case *LsTLVNodeName: - // l.Node.Name = &v.Name + // case *LsTLVNodeName: + // l.Node.Name = &v.Name - // case *LsTLVIsisArea: - // l.Node.IsisArea = &v.Area + // case *LsTLVIsisArea: + // l.Node.IsisArea = &v.Area - // case *LsTLVLocalIPv4RouterID: - // l.Node.LocalRouterID = &v.IP - // l.Link.LocalRouterID = &v.IP + // case *LsTLVLocalIPv4RouterID: + // l.Node.LocalRouterID = &v.IP + // l.Link.LocalRouterID = &v.IP - // case *LsTLVLocalIPv6RouterID: - // l.Node.LocalRouterIDv6 = &v.IP - // l.Link.LocalRouterIDv6 = &v.IP + // case *LsTLVLocalIPv6RouterID: + // l.Node.LocalRouterIDv6 = &v.IP + // l.Link.LocalRouterIDv6 = &v.IP - // case *LsTLVSrCapabilities: - // l.Node.SrCapabilties = v.Extract() + // case *LsTLVSrCapabilities: + // l.Node.SrCapabilties = v.Extract() - // case *LsTLVSrAlgorithm: - // l.Node.SrAlgorithms = &v.Algorithm + // case *LsTLVSrAlgorithm: + // l.Node.SrAlgorithms = &v.Algorithm - // case *LsTLVSrLocalBlock: - // l.Node.SrLocalBlock = v.Extract() + // case *LsTLVSrLocalBlock: + // l.Node.SrLocalBlock = v.Extract() - // case *LsTLVRemoteIPv4RouterID: - // l.Link.RemoteRouterID = &v.IP + // case *LsTLVRemoteIPv4RouterID: + // l.Link.RemoteRouterID = &v.IP - // case *LsTLVRemoteIPv6RouterID: - // l.Link.RemoteRouterIDv6 = &v.IP + // case *LsTLVRemoteIPv6RouterID: + // l.Link.RemoteRouterIDv6 = &v.IP - // case *LsTLVAdminGroup: - // l.Link.AdminGroup = &v.AdminGroup + // case *LsTLVAdminGroup: + // l.Link.AdminGroup = &v.AdminGroup - // case *LsTLVMaxLinkBw: - // l.Link.Bandwidth = &v.Bandwidth + // case *LsTLVMaxLinkBw: + // l.Link.Bandwidth = &v.Bandwidth - // case *LsTLVMaxReservableLinkBw: - // l.Link.ReservableBandwidth = &v.Bandwidth + // case *LsTLVMaxReservableLinkBw: + // l.Link.ReservableBandwidth = &v.Bandwidth - // case *LsTLVUnreservedBw: - // l.Link.UnreservedBandwidth = &v.Bandwidth + // case *LsTLVUnreservedBw: + // l.Link.UnreservedBandwidth = &v.Bandwidth - // case *LsTLVSrlg: - // l.Link.Srlgs = &v.Srlgs + // case *LsTLVSrlg: + // l.Link.Srlgs = &v.Srlgs - // case *LsTLVTEDefaultMetric: - // l.Link.DefaultTEMetric = &v.Metric + // case *LsTLVTEDefaultMetric: + // l.Link.DefaultTEMetric = &v.Metric - // case *LsTLVIGPMetric: - // l.Link.IGPMetric = &v.Metric + // case *LsTLVIGPMetric: + // l.Link.IGPMetric = &v.Metric - // case *LsTLVOpaqueLinkAttr: - // l.Link.Opaque = &v.Attr + // case *LsTLVOpaqueLinkAttr: + // l.Link.Opaque = &v.Attr - // case *LsTLVLinkName: - // l.Link.Name = &v.Name + // case *LsTLVLinkName: + // l.Link.Name = &v.Name - // case *LsTLVAdjacencySID: - // l.Link.SrAdjacencySID = &v.SID + // case *LsTLVAdjacencySID: + // l.Link.SrAdjacencySID = &v.SID - // case *LsTLVIGPFlags: - // l.Prefix.IGPFlags = v.Extract() + // case *LsTLVIGPFlags: + // l.Prefix.IGPFlags = v.Extract() - // case *LsTLVOpaquePrefixAttr: - // l.Prefix.Opaque = &v.Attr + // case *LsTLVOpaquePrefixAttr: + // l.Prefix.Opaque = &v.Attr - // case *LsTLVPrefixSID: - // l.Prefix.SrPrefixSID = &v.SID - // } - // } + // case *LsTLVPrefixSID: + // l.Prefix.SrPrefixSID = &v.SID + } + } return s } @@ -166,86 +172,6 @@ func (p *PathAttributePrefixSID) DecodeFromBytes(data []byte, options ...*Marsha switch t.Type { case 5: tlv = &PrefixSIDType5{} - // // Node NLRI-related TLVs (https://tools.ietf.org/html/rfc7752#section-3.3.1) - // case LS_TLV_NODE_FLAG_BITS: - // tlv = &LsTLVNodeFlagBits{} - - // case LS_TLV_OPAQUE_NODE_ATTR: - // tlv = &LsTLVOpaqueNodeAttr{} - - // case LS_TLV_NODE_NAME: - // tlv = &LsTLVNodeName{} - - // case LS_TLV_ISIS_AREA: - // tlv = &LsTLVIsisArea{} - - // // Used by Link NLRI as well. - // case LS_TLV_IPV4_LOCAL_ROUTER_ID: - // tlv = &LsTLVLocalIPv4RouterID{} - - // // Used by Link NLRI as well. - // case LS_TLV_IPV6_LOCAL_ROUTER_ID: - // tlv = &LsTLVLocalIPv6RouterID{} - - // // SR-related TLVs (draft-ietf-idr-bgp-ls-segment-routing-ext-08) for Node NLRI - // case LS_TLV_SR_CAPABILITIES: - // tlv = &LsTLVSrCapabilities{} - - // case LS_TLV_SR_ALGORITHM: - // tlv = &LsTLVSrAlgorithm{} - - // case LS_TLV_SR_LOCAL_BLOCK: - // tlv = &LsTLVSrLocalBlock{} - - // // Link NLRI-related TLVs (https://tools.ietf.org/html/rfc7752#section-3.3.2) - // case LS_TLV_IPV4_REMOTE_ROUTER_ID: - // tlv = &LsTLVRemoteIPv4RouterID{} - - // case LS_TLV_IPV6_REMOTE_ROUTER_ID: - // tlv = &LsTLVRemoteIPv6RouterID{} - - // case LS_TLV_ADMIN_GROUP: - // tlv = &LsTLVAdminGroup{} - - // case LS_TLV_MAX_LINK_BANDWIDTH: - // tlv = &LsTLVMaxLinkBw{} - - // case LS_TLV_MAX_RESERVABLE_BANDWIDTH: - // tlv = &LsTLVMaxReservableLinkBw{} - - // case LS_TLV_UNRESERVED_BANDWIDTH: - // tlv = &LsTLVUnreservedBw{} - - // case LS_TLV_SRLG: - // tlv = &LsTLVSrlg{} - - // case LS_TLV_TE_DEFAULT_METRIC: - // tlv = &LsTLVTEDefaultMetric{} - - // case LS_TLV_IGP_METRIC: - // tlv = &LsTLVIGPMetric{} - - // case LS_TLV_OPAQUE_LINK_ATTR: - // tlv = &LsTLVOpaqueLinkAttr{} - - // case LS_TLV_LINK_NAME: - // tlv = &LsTLVLinkName{} - - // // SR-related TLVs (draft-ietf-idr-bgp-ls-segment-routing-ext-08) for Link NLRI - // case LS_TLV_ADJACENCY_SID: - // tlv = &LsTLVAdjacencySID{} - - // // Prefix NLRI-related TLVs (https://tools.ietf.org/html/rfc7752#section-3.3.3) - // case LS_TLV_IGP_FLAGS: - // tlv = &LsTLVIGPFlags{} - - // case LS_TLV_OPAQUE_PREFIX_ATTR: - // tlv = &LsTLVOpaquePrefixAttr{} - - // // SR-related TLVs (draft-ietf-idr-bgp-ls-segment-routing-ext-08) for Prefix NLRI - // case LS_TLV_PREFIX_SID: - // tlv = &LsTLVPrefixSID{} - default: tlvs = tlvs[t.Len():] continue @@ -297,9 +223,10 @@ func (p *PathAttributePrefixSID) MarshalJSON() ([]byte, error) { }) } +// PrefixSIDType5 defines the structure of type PrefixSIDType5 struct { - Type PrefixSIDTLVType - Length uint16 + PrefixSIDTLV + ServiceTLVs []PrefixSIDTLVInterface } func (s *PrefixSIDType5) Len() int { @@ -341,3 +268,74 @@ func (s *PrefixSIDType5) MarshalJSON() ([]byte, error) { func (s *PrefixSIDType5) String() string { return "" } + +func (s *PrefixSIDType5) Extract() string { + return "" +} + +type SRv6ServiceSubTLV struct { + PrefixSIDTLV + TLV []PrefixSIDTLVInterface +} + +func (s *SRv6ServiceSubTLV) Len() int { + return int(s.Length) + tlvHdrLen +} + +func (s *SRv6ServiceSubTLV) Serialize() ([]byte, error) { + // if len(value) != int(s.Length) { + // return nil, malformedAttrListErr("serialization failed: Prefix SID TLV malformed") + // } + + // buf := make([]byte, tlvHdrLen+len(value)) + // binary.BigEndian.PutUint16(buf[:2], uint16(s.Type)) + // binary.BigEndian.PutUint16(buf[2:4], uint16(s.Length)) + // copy(buf[4:], value) + + // return buf, nil + return nil, nil +} + +func (s *SRv6ServiceSubTLV) DecodeFromBytes(data []byte) error { + if len(data) < tlvHdrLen { + return malformedAttrListErr("decoding failed: Prefix SID TLV malformed") + } + s.Type = PrefixSIDTLVType(binary.BigEndian.Uint16(data[:2])) + s.Length = binary.BigEndian.Uint16(data[2:4]) + + if len(data) < s.Len() { + return malformedAttrListErr("decoding failed: Prefix SID TLV malformed") + } + + return nil +} + +func (s *SRv6ServiceSubTLV) MarshalJSON() ([]byte, error) { + return nil, nil +} + +func (s *SRv6ServiceSubTLV) String() string { + return "" +} + +// SRv6InformationSubTLV defines a structure of SRv6 Information Sub TLV (type 1) object +// https://tools.ietf.org/html/draft-dawra-bess-srv6-services-02#section-2.1.1 +type SRv6InformationSubTLV struct { + PrefixSIDTLV + SID []byte + Flags uint8 + EndpointBehavior uint16 + SubSubTLV []PrefixSIDTLVInterface +} + +// SRv6SIDStructureSubSubTLV defines a structure of SRv6 SID Structure Sub Sub TLV (type 1) object +// https://tools.ietf.org/html/draft-dawra-bess-srv6-services-02#section-2.1.2.1 +type SRv6SIDStructureSubSubTLV struct { + PrefixSIDTLV + LocalBlockLength uint8 `json:"local_block_length,omitempty"` + LocatorNodeLength uint8 `json:"locator_node_length,omitempty"` + FunctionLength uint8 `json:"function_length,omitempty"` + ArgumentLength uint8 `json:"argument_length,omitempty"` + TranspositionLength uint8 `json:"transposition_length,omitempty"` + TranspositionOffset uint8 `json:"transposition_offset,omitempty"` +} |