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Implement handling of OSPFv3 packets
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package packetv3 | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/binary" | ||
|
|
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| "github.com/bio-routing/bio-rd/net" | ||
| "github.com/bio-routing/tflow2/convert" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
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| // Serializable represents any packet which can be serialized | ||
| // to bytes to be on the wire | ||
| type Serializable interface { | ||
| Serialize(buf *bytes.Buffer) | ||
| } | ||
|
|
||
| // ID is a common type used for 32-bit IDs in OSPF | ||
| type ID uint32 | ||
|
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| func DeserializeID(buf *bytes.Buffer) (ID, int, error) { | ||
| var id uint32 | ||
| if err := binary.Read(buf, binary.BigEndian, &id); err != nil { | ||
| return ID(id), 0, errors.Wrap(err, "unable to read ID from buffer") | ||
| } | ||
| return ID(id), 4, nil | ||
| } | ||
|
|
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| func (i ID) Serialize(buf *bytes.Buffer) { | ||
| buf.Write(convert.Uint32Byte(uint32(i))) | ||
| } | ||
|
|
||
| // bitmasks for flags in RouterOptions | ||
| const ( | ||
| RouterOptV6 uint16 = 1 << iota | ||
| RouterOptE | ||
| _ | ||
| RouterOptN | ||
| RouterOptR | ||
| RouterOptDC | ||
| _ | ||
| _ | ||
| RouterOptAF | ||
| ) | ||
|
|
||
| type RouterOptions struct { | ||
| _ uint8 | ||
| Flags uint16 | ||
| } | ||
|
|
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| func (r *RouterOptions) Serialize(buf *bytes.Buffer) { | ||
| buf.WriteByte(0) | ||
| buf.Write(convert.Uint16Byte(uint16(r.Flags))) | ||
| } | ||
|
|
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| type LSType uint16 | ||
|
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| func (t LSType) Serialize(buf *bytes.Buffer) { | ||
| buf.Write(convert.Uint16Byte(uint16(t))) | ||
| } | ||
|
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| type deserializableIP struct { | ||
| Higher uint64 | ||
| Lower uint64 | ||
| } | ||
|
|
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| func (ip deserializableIP) ToNetIP() net.IP { | ||
| return *(net.IPv6(ip.Higher, ip.Lower)) | ||
| } | ||
|
|
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| func serializeIPv6(ip net.IP, buf *bytes.Buffer) { | ||
| if ip.IsIPv4() { | ||
| for i := 0; i < 16; i++ { | ||
| buf.WriteByte(0) | ||
| } | ||
| return | ||
| } | ||
|
|
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| buf.Write(ip.Bytes()) | ||
| } |
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protocols/ospf/packetv3/fixtures/packets/OSPFv3_NBMA_adjacencies.cap.go
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protocols/ospf/packetv3/fixtures/packets/OSPFv3_broadcast_adjacency.cap.go
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