3 files changed, 183 insertions, 0 deletions
diff --git a/packet/clc/connectionless.go b/packet/clc/connectionless.go
new file mode 100644
index 0000000..96db112
--- /dev/null
+++ b/packet/clc/connectionless.go
@@ -0,0 +1,64 @@
+package clc
+
+import (
+	"errors"
+
+	"github.com/osm/quake/common/args"
+	"github.com/osm/quake/common/buffer"
+	"github.com/osm/quake/common/context"
+	"github.com/osm/quake/packet/command"
+	"github.com/osm/quake/packet/command/connect"
+	"github.com/osm/quake/packet/command/getchallenge"
+	"github.com/osm/quake/packet/command/passthrough"
+)
+
+type Connectionless struct {
+	Command command.Command
+}
+
+func (cmd *Connectionless) Bytes() []byte {
+	buf := buffer.New()
+
+	buf.PutInt32(-1)
+	buf.PutBytes(cmd.Command.Bytes())
+
+	return buf.Bytes()
+}
+
+func parseConnectionless(ctx *context.Context, buf *buffer.Buffer) (*Connectionless, error) {
+	var err error
+	var pkg Connectionless
+
+	if err := buf.Skip(4); err != nil {
+		return nil, err
+	}
+
+	var str string
+	if str, err = buf.GetString(); err != nil {
+		return nil, err
+	}
+
+	args := args.Parse(str)
+	if len(args) != 1 {
+		return nil, errors.New("unexpected length of parsed arguments")
+	}
+
+	arg := args[0]
+
+	var cmd command.Command
+	switch arg.Cmd {
+	case "connect":
+		cmd, err = connect.Parse(ctx, buf, arg)
+	case "getchallenge":
+		cmd, err = getchallenge.Parse(ctx, buf)
+	default:
+		cmd, err = passthrough.Parse(ctx, buf, str)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+	pkg.Command = cmd
+
+	return &pkg, nil
+}
diff --git a/packet/clc/gamedata.go b/packet/clc/gamedata.go
new file mode 100644
index 0000000..7ee5890
--- /dev/null
+++ b/packet/clc/gamedata.go
@@ -0,0 +1,101 @@
+package clc
+
+import (
+	"errors"
+
+	"github.com/osm/quake/common/buffer"
+	"github.com/osm/quake/common/context"
+	"github.com/osm/quake/packet/command"
+	"github.com/osm/quake/packet/command/bad"
+	"github.com/osm/quake/packet/command/delta"
+	"github.com/osm/quake/packet/command/ftevoicechatc"
+	"github.com/osm/quake/packet/command/move"
+	"github.com/osm/quake/packet/command/mvdweapon"
+	"github.com/osm/quake/packet/command/nopc"
+	"github.com/osm/quake/packet/command/stringcmd"
+	"github.com/osm/quake/packet/command/tmove"
+	"github.com/osm/quake/packet/command/upload"
+	"github.com/osm/quake/protocol"
+	"github.com/osm/quake/protocol/fte"
+	"github.com/osm/quake/protocol/mvd"
+)
+
+var ErrUnknownCommandType = errors.New("unknown command type")
+
+type GameData struct {
+	Seq      uint32
+	Ack      uint32
+	QPort    uint16
+	Commands []command.Command
+}
+
+func (gd *GameData) Bytes() []byte {
+	buf := buffer.New()
+
+	buf.PutUint32(gd.Seq)
+	buf.PutUint32(gd.Ack)
+	buf.PutUint16(gd.QPort)
+
+	for _, c := range gd.Commands {
+		buf.PutBytes(c.Bytes())
+	}
+
+	return buf.Bytes()
+}
+
+func parseGameData(ctx *context.Context, buf *buffer.Buffer) (*GameData, error) {
+	var err error
+	var pkg GameData
+
+	if pkg.Seq, err = buf.GetUint32(); err != nil {
+		return nil, err
+	}
+
+	if pkg.Ack, err = buf.GetUint32(); err != nil {
+		return nil, err
+	}
+
+	if pkg.QPort, err = buf.GetUint16(); err != nil {
+		return nil, err
+	}
+
+	var cmd command.Command
+	for buf.Off() < buf.Len() {
+		typ, err := buf.ReadByte()
+		if err != nil {
+			return nil, err
+		}
+
+		switch protocol.CommandType(typ) {
+		case protocol.CLCBad:
+			cmd, err = bad.Parse(ctx, buf, protocol.CLCBad)
+		case protocol.CLCNOP:
+			cmd, err = nopc.Parse(ctx, buf)
+		case protocol.CLCDoubleMove:
+		case protocol.CLCMove:
+			cmd, err = move.Parse(ctx, buf)
+		case protocol.CLCStringCmd:
+			cmd, err = stringcmd.Parse(ctx, buf)
+		case protocol.CLCDelta:
+			cmd, err = delta.Parse(ctx, buf)
+		case protocol.CLCTMove:
+			cmd, err = tmove.Parse(ctx, buf)
+		case protocol.CLCUpload:
+			cmd, err = upload.Parse(ctx, buf)
+		case fte.CLCVoiceChat:
+			cmd, err = ftevoicechatc.Parse(ctx, buf)
+		case mvd.CLCWeapon:
+			cmd, err = mvdweapon.Parse(ctx, buf)
+		default:
+			return nil, ErrUnknownCommandType
+		}
+
+		if err != nil {
+			return nil, err
+		}
+
+		pkg.Commands = append(pkg.Commands, cmd)
+	}
+
+	return &pkg, nil
+}
diff --git a/packet/clc/parse.go b/packet/clc/parse.go
new file mode 100644
index 0000000..594a9dd
--- /dev/null
+++ b/packet/clc/parse.go
@@ -0,0 +1,18 @@
+package clc
+
+import (
+	"github.com/osm/quake/common/buffer"
+	"github.com/osm/quake/common/context"
+	"github.com/osm/quake/packet"
+)
+
+func Parse(ctx *context.Context, data []byte) (packet.Packet, error) {
+	buf := buffer.New(buffer.WithData(data))
+
+	header, _ := buf.PeekInt32()
+	if header == -1 {
+		return parseConnectionless(ctx, buf)
+	}
+
+	return parseGameData(ctx, buf)
+}