95 lines
1.5 KiB
Go
95 lines
1.5 KiB
Go
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package cassandra
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import (
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"bytes"
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"encoding/binary"
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"git.loafle.net/overflow/overflow_discovery/service/matcher"
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)
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type cassandra struct {
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Version uint8
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Flags uint8
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Stream uint16
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Opcode uint8
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Length uint32
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}
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type CassandraMatcher struct {
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matcher.Matchers
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}
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func (m *CassandraMatcher) ServiceName() string {
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return "Cassandra"
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}
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func (m *CassandraMatcher) IsPrePacket() bool {
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return false
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}
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func (m *CassandraMatcher) HasResponse(index int) bool {
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return true
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}
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func (m *CassandraMatcher) IsError(info matcher.MatchInfo, index int, packet *matcher.Packet) bool {
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return false
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}
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func (m *CassandraMatcher) Match(info matcher.MatchInfo, index int, packet *matcher.Packet) bool {
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if packet == nil {
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return false
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}
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reader := new(bytes.Buffer)
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reader.Write(packet.Buffer)
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c := cassandra{}
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if err := binary.Read(reader, binary.BigEndian, &c); err != nil {
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return false
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}
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if c.Version != 0x84 {
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return false
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}
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if c.Flags != 0x00 {
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return false
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}
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if c.Stream != 0x00 {
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return false
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}
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if c.Opcode != 0x06 {
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return false
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}
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//var itemcount uint16
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//if binary.Read(reader, binary.BigEndian, &itemcount) != nil {
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// return false
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//}
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//
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//if itemcount != 0 && itemcount != 2 {
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// return false
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//}
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return true
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}
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func NewMatcher() matcher.Matcher {
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m := &CassandraMatcher{}
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c := cassandra{
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Version: 4,
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Flags: 0,
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Stream: 0,
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Opcode: 5,
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Length: 0,
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}
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writer := new(bytes.Buffer)
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binary.Write(writer, binary.LittleEndian, c)
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m.AddPacket(matcher.NewPacket(writer.Bytes(), writer.Len()))
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return m
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}
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