repository cleanup

network/mhfpacket/msg_sys_ack.go

@@ -0,0 +1,71 @@
+package mhfpacket
+
+import (
+	"erupe-ce/network"
+	"erupe-ce/network/clientctx"
+	"erupe-ce/common/byteframe"
+)
+
+// MsgSysAck represents the MSG_SYS_ACK
+type MsgSysAck struct {
+	AckHandle        uint32
+	IsBufferResponse bool
+	ErrorCode        uint8
+	AckData          []byte
+}
+
+// Opcode returns the ID associated with this packet type.
+func (m *MsgSysAck) Opcode() network.PacketID {
+	return network.MSG_SYS_ACK
+}
+
+// Parse parses the packet from binary
+func (m *MsgSysAck) Parse(bf *byteframe.ByteFrame, ctx *clientctx.ClientContext) error {
+	m.AckHandle = bf.ReadUint32()
+	m.IsBufferResponse = bf.ReadBool()
+	m.ErrorCode = bf.ReadUint8()
+
+	payloadSize := uint(bf.ReadUint16())
+	// Extended data size field
+	if payloadSize == 0xFFFF {
+		payloadSize = uint(bf.ReadUint32())
+	}
+
+	if m.IsBufferResponse {
+		m.AckData = bf.ReadBytes(payloadSize)
+	} else {
+		// endian-swapped 4 bytes, could be any type. Unknown purpose.
+		// Probably a fixed type like (int32 or uint32), but unknown.
+		m.AckData = bf.ReadBytes(4)
+	}
+
+	return nil
+}
+
+// Build builds a binary packet from the current data.
+func (m *MsgSysAck) Build(bf *byteframe.ByteFrame, ctx *clientctx.ClientContext) error {
+	bf.WriteUint32(m.AckHandle)
+	bf.WriteBool(m.IsBufferResponse)
+	bf.WriteUint8(m.ErrorCode)
+
+	if m.IsBufferResponse {
+		if len(m.AckData) < 0xFFFF {
+			bf.WriteUint16(uint16(len(m.AckData)))
+		} else {
+			bf.WriteUint16(0xFFFF)
+			bf.WriteUint32(uint32(len(m.AckData)))
+		}
+	} else {
+		bf.WriteUint16(0x00)
+	}
+
+	if m.IsBufferResponse {
+		bf.WriteBytes(m.AckData)
+	} else if len(m.AckData) >= 4 {
+		bf.WriteBytes(m.AckData[:4])
+	} else {
+		bf.WriteBytes([]byte{0x00, 0x00, 0x00, 0x00})
+	}
+
+	return nil
+}