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Code Issues Releases Activity

packet/bgp: Missing funcs to calc byte length of NLRI

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Signed-off-by: IWASE Yusuke <[email protected]>
This commit is contained in:
IWASE Yusuke
2018-04-03 08:32:46 +09:00
committed by FUJITA Tomonori
parent 3eade60c5f
commit 752cec366b
1 changed files with 53 additions and 4 deletions
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packet/bgp/bgp.go
+53 -4
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@@ -1096,10 +1096,6 @@ func (r *IPAddrPrefixDefault) serializePrefix(bitLen uint8) ([]byte, error) {
return buf, nil
}
func (r *IPAddrPrefixDefault) Len(options ...*MarshallingOption) int {
return 1 + ((int(r.Length) + 7) / 8)
}
func (r *IPAddrPrefixDefault) String() string {
return fmt.Sprintf("%s/%d", r.Prefix.String(), r.Length)
}
@@ -1170,6 +1166,10 @@ func (r *IPAddrPrefix) SAFI() uint8 {
return SAFI_UNICAST
}
func (r *IPAddrPrefix) Len(options ...*MarshallingOption) int {
return 1 + ((int(r.Length) + 7) / 8)
}
func NewIPAddrPrefix(length uint8, prefix string) *IPAddrPrefix {
p := &IPAddrPrefix{
IPAddrPrefixDefault{
@@ -1676,6 +1676,14 @@ func (l *LabeledVPNIPAddrPrefix) SAFI() uint8 {
return SAFI_MPLS_VPN
}
func (l *LabeledVPNIPAddrPrefix) IPPrefixLen() uint8 {
return l.Length - 8*uint8(l.Labels.Len()+l.RD.Len())
}
func (l *LabeledVPNIPAddrPrefix) Len(options ...*MarshallingOption) int {
return 1 + l.Labels.Len() + l.RD.Len() + int((l.IPPrefixLen()+7)/8)
}
func (l *LabeledVPNIPAddrPrefix) String() string {
return fmt.Sprintf("%s:%s", l.RD, l.IPPrefix())
}
@@ -1754,6 +1762,14 @@ func (r *LabeledIPAddrPrefix) SAFI() uint8 {
return SAFI_MPLS_LABEL
}
func (l *LabeledIPAddrPrefix) IPPrefixLen() uint8 {
return l.Length - 8*uint8(l.Labels.Len())
}
func (l *LabeledIPAddrPrefix) Len(options ...*MarshallingOption) int {
return 1 + l.Labels.Len() + int((l.IPPrefixLen()+7)/8)
}
func (l *LabeledIPAddrPrefix) DecodeFromBytes(data []byte, options ...*MarshallingOption) error {
f := RF_IPv4_MPLS
if l.addrlen == 16 {
@@ -2212,6 +2228,11 @@ type EVPNEthernetAutoDiscoveryRoute struct {
Label uint32
}
func (er *EVPNEthernetAutoDiscoveryRoute) Len() int {
// RD(8) + ESI(10) + ETag(4) + Label(3)
return 25
}
func (er *EVPNEthernetAutoDiscoveryRoute) DecodeFromBytes(data []byte) error {
er.RD = GetRouteDistinguisher(data)
data = data[er.RD.Len():]
@@ -2297,6 +2318,12 @@ type EVPNMacIPAdvertisementRoute struct {
Labels []uint32
}
func (er *EVPNMacIPAdvertisementRoute) Len() int {
// RD(8) + ESI(10) + ETag(4) + MacAddressLength(1) + MacAddress(6)
// + IPAddressLength(1) + IPAddress(0, 4 or 16) + Labels(3 or 6)
return 30 + int(er.IPAddressLength)/8 + len(er.Labels)*3
}
func (er *EVPNMacIPAdvertisementRoute) DecodeFromBytes(data []byte) error {
er.RD = GetRouteDistinguisher(data)
data = data[er.RD.Len():]
@@ -2421,6 +2448,11 @@ type EVPNMulticastEthernetTagRoute struct {
IPAddress net.IP
}
func (er *EVPNMulticastEthernetTagRoute) Len() int {
// RD(8) + ETag(4) + IPAddressLength(1) + IPAddress(4 or 16)
return 13 + int(er.IPAddressLength)/8
}
func (er *EVPNMulticastEthernetTagRoute) DecodeFromBytes(data []byte) error {
er.RD = GetRouteDistinguisher(data)
data = data[er.RD.Len():]
@@ -2497,6 +2529,11 @@ type EVPNEthernetSegmentRoute struct {
IPAddress net.IP
}
func (er *EVPNEthernetSegmentRoute) Len() int {
// RD(8) + ESI(10) + IPAddressLength(1) + IPAddress(4 or 16)
return 19 + int(er.IPAddressLength)/8
}
func (er *EVPNEthernetSegmentRoute) DecodeFromBytes(data []byte) error {
er.RD = GetRouteDistinguisher(data)
data = data[er.RD.Len():]
@@ -2575,6 +2612,13 @@ type EVPNIPPrefixRoute struct {
Label uint32
}
func (er *EVPNIPPrefixRoute) Len() int {
if er.IPPrefix.To4() != nil {
return 34
}
return 58
}
func (er *EVPNIPPrefixRoute) DecodeFromBytes(data []byte) error {
addrLen := net.IPv4len
switch len(data) {
@@ -2693,6 +2737,7 @@ func (er *EVPNIPPrefixRoute) rd() RouteDistinguisherInterface {
}
type EVPNRouteTypeInterface interface {
Len() int
DecodeFromBytes([]byte) error
Serialize() ([]byte, error)
String() string
@@ -2889,6 +2934,10 @@ func (n *EncapNLRI) SAFI() uint8 {
return SAFI_ENCAPSULATION
}
func (n *EncapNLRI) Len(options ...*MarshallingOption) int {
return 1 + len(n.Prefix)
}
func NewEncapNLRI(endpoint string) *EncapNLRI {
return &EncapNLRI{
IPAddrPrefixDefault{Length: 32, Prefix: net.ParseIP(endpoint).To4()},