From a77cf8169b42a4394e62f7a381ca546b27d0f723 Mon Sep 17 00:00:00 2001
From: Arda Serdar Pektezol <1669855+pektezol@users.noreply.github.com>
Date: Mon, 7 Nov 2022 16:09:44 +0300
Subject: starting fresh for the third time

---
 packets/header.go  | 33 ++++++++++++++++++++++++++++
 packets/message.go | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 packets/types.go   | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 161 insertions(+)
 create mode 100644 packets/header.go
 create mode 100644 packets/message.go
 create mode 100644 packets/types.go

(limited to 'packets')

diff --git a/packets/header.go b/packets/header.go
new file mode 100644
index 0000000..60cd146
--- /dev/null
+++ b/packets/header.go
@@ -0,0 +1,33 @@
+package packets
+
+import (
+	"fmt"
+
+	"github.com/pektezol/bitreader"
+)
+
+func ParseHeader(reader *bitreader.ReaderType) {
+	header := Header{
+		DemoFileStamp:   reader.TryReadStringLen(8),
+		DemoProtocol:    uint(reader.TryReadInt32()),
+		NetworkProtocol: uint(reader.TryReadInt32()),
+		ServerName:      reader.TryReadStringLen(260),
+		ClientName:      reader.TryReadStringLen(260),
+		MapName:         reader.TryReadStringLen(260),
+		GameDirectory:   reader.TryReadStringLen(260),
+		PlaybackTime:    reader.TryReadFloat32(),
+		PlaybackTicks:   int(reader.TryReadInt32()),
+		PlaybackFrames:  int(reader.TryReadInt32()),
+		SignOnLength:    uint(reader.TryReadInt32()),
+	}
+	if header.DemoFileStamp != "HL2DEMO" {
+		panic("Invalid demo file stamp. Make sure a valid demo file is given.")
+	}
+	if header.DemoProtocol != 4 {
+		panic("Given demo is from old engine. This parser is only supported for new engine.")
+	}
+	if header.NetworkProtocol != 2001 {
+		panic("Given demo is not from Portal2. This parser currently only supports Portal 2.")
+	}
+	fmt.Println(header)
+}
diff --git a/packets/message.go b/packets/message.go
new file mode 100644
index 0000000..a8e830d
--- /dev/null
+++ b/packets/message.go
@@ -0,0 +1,64 @@
+package packets
+
+import (
+	"fmt"
+
+	"github.com/pektezol/bitreader"
+)
+
+func ParseMessage(reader *bitreader.ReaderType) (status int) {
+	messageType := reader.TryReadInt8()
+	messageTick := reader.TryReadInt32()
+	messageSlot := reader.TryReadInt8()
+	//fmt.Println(messageType, messageTick, messageSlot)
+	switch messageType {
+	case 0x01:
+		//signOn := SignOn{}
+		reader.SkipBytes(76*2 + 8)
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		fmt.Printf("[%d] (%d) {%d} SignOn: \n", messageTick, messageType, messageSlot)
+		return 1
+	case 0x02:
+		reader.SkipBytes(76*2 + 8)
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		// fmt.Printf("[%d] (%d) Packet: \n", messageTick, messageType)
+		return 2
+	case 0x03:
+		fmt.Printf("[%d] (%d) SyncTick: \n", messageTick, messageType)
+		return 3
+	case 0x04:
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		// fmt.Printf("[%d] (%d) ConsoleCmd: \n", messageTick, messageType)
+		return 4
+	case 0x05:
+		reader.SkipBytes(4)
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		// fmt.Printf("[%d] (%d) UserCmd: \n", messageTick, messageType)
+		return 5
+	case 0x06:
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		// fmt.Printf("[%d] (%d) DataTables: \n", messageTick, messageType)
+		return 6
+	case 0x07:
+		fmt.Printf("[%d] (%d) Stop: \n", messageTick, messageType)
+		return 7
+	case 0x08:
+		reader.SkipBytes(4)
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		// fmt.Printf("[%d] (%d) CustomData: \n", messageTick, messageType)
+		return 8
+	case 0x09:
+		val := reader.TryReadInt32()
+		reader.SkipBytes(int(val))
+		// fmt.Printf("[%d] (%d) StringTables: \n", messageTick, messageType)
+		return 9
+	default:
+		return 0
+	}
+}
diff --git a/packets/types.go b/packets/types.go
new file mode 100644
index 0000000..5f7a29b
--- /dev/null
+++ b/packets/types.go
@@ -0,0 +1,64 @@
+package packets
+
+type Header struct {
+	DemoFileStamp   string
+	DemoProtocol    uint
+	NetworkProtocol uint
+	ServerName      string
+	ClientName      string
+	MapName         string
+	GameDirectory   string
+	PlaybackTime    float32
+	PlaybackTicks   int
+	PlaybackFrames  int
+	SignOnLength    uint
+}
+
+type SignOn struct {
+	PacketInfo  []byte
+	InSequence  int32
+	OutSequence int32
+	Size        int32
+	Data        []byte
+}
+
+type Packet struct {
+	PacketInfo  []byte
+	InSequence  int32
+	OutSequence int32
+	Size        int32
+	Data        []byte
+}
+
+type SyncTick struct{}
+
+type ConsoleCmd struct {
+	Size int32
+	Data string
+}
+
+type UserCmd struct {
+	Cmd  int32
+	Size int32
+	Data []byte
+}
+
+type DataTables struct {
+	Size int32
+	Data []byte
+}
+
+type Stop struct {
+	RemainingData []byte
+}
+
+type CustomData struct {
+	Unknown int32
+	Size    int32
+	Data    []byte
+}
+
+type StringTables struct {
+	Size int32
+	Data []byte
+}
-- 
cgit v1.2.3