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// Copyright 2019-2022 Graham Clark. All rights reserved. Use of this source
// code is governed by the MIT license that can be found in the LICENSE
// file.
package streams
import (
"encoding/hex"
"fmt"
"strings"
)
//======================================================================
type IChunk interface {
Direction() Direction
StreamData() []byte
}
type IOnStreamChunk interface {
OnStreamChunk(chunk IChunk)
}
type IOnStreamHeader interface {
OnStreamHeader(header FollowHeader)
}
//======================================================================
type parseContext interface {
Err() error
}
type StreamParseError struct{}
func (e StreamParseError) Error() string {
return "Stream reassembly parse error"
}
var _ error = StreamParseError{}
//======================================================================
type Protocol int
const (
Unspecified Protocol = 0
TCP Protocol = iota
UDP Protocol = iota
)
var _ fmt.Stringer = Protocol(0)
func (p Protocol) String() string {
switch p {
case Unspecified:
return "Unspecified"
case TCP:
return "TCP"
case UDP:
return "UDP"
default:
panic(nil)
}
}
//======================================================================
type Direction int
const (
Client Direction = 0
Server Direction = iota
)
func (d Direction) String() string {
switch d {
case Client:
return "Client"
case Server:
return "Server"
default:
return "Unknown!"
}
}
//======================================================================
type Bytes struct {
Dirn Direction
Data []byte
}
var _ fmt.Stringer = Bytes{}
var _ IChunk = Bytes{}
func (b Bytes) Direction() Direction {
return b.Dirn
}
func (b Bytes) StreamData() []byte {
return b.Data
}
func (b Bytes) String() string {
return fmt.Sprintf("Direction: %v\n%s", b.Dirn, hex.Dump(b.Data))
}
//======================================================================
type FollowHeader struct {
Follow string
Filter string
Node0 string
Node1 string
}
func (h FollowHeader) String() string {
return fmt.Sprintf("[client:%s server:%s follow:%s filter:%s]", h.Node0, h.Node1, h.Follow, h.Filter)
}
type FollowStream struct {
FollowHeader
Bytes []Bytes
}
var _ fmt.Stringer = FollowStream{}
func (f FollowStream) String() string {
datastrs := make([]string, 0, len(f.Bytes))
for _, b := range f.Bytes {
datastrs = append(datastrs, b.String())
}
data := strings.Join(datastrs, "\n")
return fmt.Sprintf("Follow: %s\nFilter: %s\nNode0: %s\nNode1: %s\nData:\n%s", f.Follow, f.Filter, f.Node0, f.Node1, data)
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End:
|
