107 lines
1.9 KiB
Go
107 lines
1.9 KiB
Go
package rmi
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
|
|
csm "git.loafle.net/commons/service_matcher-go"
|
|
)
|
|
|
|
const (
|
|
MAGIC_NUMBER = 0x4a524d49
|
|
STREAM_PROTOCOL = 0x4b
|
|
VERSION = 0x0002
|
|
ACK_PROTOCOL = 0x4e
|
|
)
|
|
|
|
type RMI_SEND_MESSAGE struct {
|
|
magic uint32
|
|
version uint16
|
|
protocol uint8
|
|
}
|
|
|
|
type RMI_RECV_MESSAGE struct {
|
|
streamMessage uint8
|
|
packetLen uint16
|
|
host []byte
|
|
port [2]byte
|
|
}
|
|
|
|
type RMIMatcher struct {
|
|
csm.Matchers
|
|
}
|
|
|
|
func (r *RMIMatcher) Key() string {
|
|
return "RMI"
|
|
}
|
|
|
|
func (r *RMIMatcher) Name() string {
|
|
return "RMI"
|
|
}
|
|
|
|
func (r *RMIMatcher) Meta() csm.Metadata {
|
|
return nil
|
|
}
|
|
|
|
func (r *RMIMatcher) IsPrePacket() bool {
|
|
return false
|
|
}
|
|
|
|
func (r *RMIMatcher) HasResponse(index int) bool {
|
|
return true
|
|
}
|
|
|
|
func (r *RMIMatcher) IsError(info csm.MatchInfo, index int, packet *csm.Packet) bool {
|
|
return false
|
|
}
|
|
|
|
func (r *RMIMatcher) Match(info csm.MatchInfo, index int, packet *csm.Packet) error {
|
|
|
|
if packet == nil || packet.Buffer == nil || packet.Len == 0 {
|
|
return csm.NoPacketReceivedError()
|
|
}
|
|
|
|
rmiRecv := RMI_RECV_MESSAGE{}
|
|
|
|
buf := bytes.NewReader(packet.Buffer)
|
|
binary.Read(buf, binary.BigEndian, &rmiRecv.streamMessage)
|
|
binary.Read(buf, binary.BigEndian, &rmiRecv.packetLen)
|
|
|
|
lenInt := int(rmiRecv.packetLen)
|
|
|
|
var tempHost = make([]byte, lenInt, lenInt)
|
|
copy(rmiRecv.host, tempHost)
|
|
|
|
rmiRecv.host = tempHost
|
|
|
|
binary.Read(buf, binary.BigEndian, &rmiRecv.host)
|
|
binary.Read(buf, binary.BigEndian, &rmiRecv.port)
|
|
|
|
hostIp := string(rmiRecv.host[:lenInt])
|
|
|
|
if rmiRecv.streamMessage == ACK_PROTOCOL && lenInt == len(hostIp) {
|
|
return nil
|
|
}
|
|
|
|
return csm.NotMatchedError()
|
|
}
|
|
|
|
func NewMatcher() csm.Matcher {
|
|
|
|
m := &RMIMatcher{}
|
|
rsm := RMI_SEND_MESSAGE{
|
|
magic: MAGIC_NUMBER,
|
|
version: VERSION,
|
|
protocol: STREAM_PROTOCOL,
|
|
}
|
|
|
|
mCache := new(bytes.Buffer)
|
|
binary.Write(mCache, binary.BigEndian, rsm)
|
|
|
|
sendByte := mCache.Bytes()
|
|
|
|
m.AddPacket(csm.NewPacket(sendByte, len(sendByte)))
|
|
|
|
return m
|
|
}
|