Renamed project

libipcamera/protocol.go

@@ -0,0 +1,76 @@
+package libipcamera
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+
+	"github.com/icza/bitio"
+)
+
+// Header is an ipcamera protocol message header
+type Header struct {
+	Magic       uint16
+	Length      uint16
+	MessageType uint32
+}
+
+func (h *Header) String() string {
+	return fmt.Sprintf("{ Header Magic=0x%X, Length=%d, MessageType=0x%X }", h.Magic, h.Length, h.MessageType)
+}
+
+// Message represents a complete message from/to the camera
+type Message struct {
+	Header  Header
+	Payload []byte
+}
+
+func (m *Message) String() string {
+	return fmt.Sprintf("{ Message Header=%s, Payload=\n%s\n }", m.Header, hex.Dump(m.Payload))
+}
+
+// StreamHeader is a live preview message header
+type StreamHeader struct {
+	Magic          uint16
+	Length         uint16
+	SequenceNumber uint16
+	MessageType    uint16
+}
+
+// CreatePacket creates a packet ready to be sent to the camera
+func CreatePacket(header Header, payload []byte) []byte {
+	header.Length = (uint16)(len(payload))
+
+	buf := &bytes.Buffer{}
+	w := bitio.NewWriter(buf)
+	w.WriteBits((uint64)(header.Magic), 16)
+	w.WriteBits((uint64)(header.Length), 16)
+	w.WriteBits((uint64)(header.MessageType), 32)
+	w.Write(payload)
+	return buf.Bytes()
+}
+
+// CreateCommandHeader prepares a packet header for command packets
+func CreateCommandHeader(command uint32) Header {
+	return Header{
+		Magic:       0xABCD,
+		Length:      0,
+		MessageType: command,
+	}
+}
+
+// CreateLoginPacket creates a Login packet to be sent to the camera
+func CreateLoginPacket(username, password string) []byte {
+	header := CreateCommandHeader(0x00000110) // Login
+	payload := make([]byte, 128)
+	copy(payload, []byte(username))
+	copy(payload[64:], []byte(password))
+
+	return CreatePacket(header, payload)
+}
+
+// CreateCommandPacket prepares a command packet to be sent to the camera
+func CreateCommandPacket(command uint32) []byte {
+	header := CreateCommandHeader(command)
+	return CreatePacket(header, []byte{})
+}