End Type
'常量
Public Const PF_INET = 2
Public Const SOCK_RAW = 3
Public Const AF_INET = 2
Public Const FD_READ = &H1
Public Const SIO_RCVALL = &H98000001
Public Const EM_REPLACESEL = &HC2
Public host As HOSTENT
Public s As Long
Public sock As sockaddr
Public Header As ipheader
Public tcpHead As tcp_hdr
Public udpHead As udp_hdr
Public icmpHead As icmp_hdr
Public resarray() As Long, str As String
Public i As Long, CountID As Long 'i 为临时变量，循环语句用，CountID 用来计算一共有多少个数据包
Public protocol As String
Public buffer() As Byte '存放数据包
Public res As Long '返回值，临时变量
Public ExitID As Boolean '退出标识
'开始
Public Sub Wstartup()
Dim Data As WSAdata
Call WSAstartup(&H202, Data) '初始化 Winsock 为 2.2
End Sub
'结束
Public Sub WCleanup(s As Long)
Call WsACleanup '关闭 Winsock
closesocket s
End Sub
'获得当前主机的 IP
Public Function ip(ByRef address As String) As String
Dim pip As Long
Dim uip As Long
Dim s As Long
Dim ss As String
Dim cul As Long
CopyMemory host, ByVal gethostbyname(address), Len(host) '将 gethostbyname 获得的值放到 host
CopyMemory pip, ByVal host.h_addr_list, 4 '将 host.h_addr_list 的值放到 pip
CopyMemory uip, ByVal pip, 4 '将 pip 的值放到 uip
s = inet_ntoa(uip) '将 uip 转换为标准的 IPV4 格式
ss = Space(lstrlen(s)) '去掉空格
cul = lstrcpy(ss, s)
ip = ss '获得 IPV4 格式的地址并将其放如 ip
End Function
'获得当前机器的主机名
Public Function hostname() As String
Dim r As Long
Dim s As String
Dim host As String
Wstartup
host = String(255, 0)
r = gethostname(host, 255) '获得当前主机的主机名
If r = 0 Then
hostname = Left(host, InStr(1, host, vbNullChar) - 1)
End If
End Function
'连接 IP
Public Sub Connecting(ByRef ip As String, pic As PictureBox)
Dim res As Long, buf As Long, bufb As Long
buf = 1
Wstartup '初始化 Winsock
s = socket(AF_INET, SOCK_RAW, 0) '创建套接字，s 是socket功能返回的文件描述符
If s < 1 Then
Call WCleanup(s)
Exit Sub '如果创建失败则退出
End If
sock.sin_family = AF_INET 'socket类型
sock.sin_addr = inet_addr(ip) '所用的IP地址
res = bind(s, sock, Len(sock)) '绑定端口
If res <> 0 Then
Call WCleanup(s)
Exit Sub '如果绑定失败则退出
End If
res = WSAIoctl(s, SIO_RCVALL, buf, Len(buf), 0, 0, bufb, ByVal 0, ByVal 0) '改变Socket IO模式，将其改为混乱模式，即接受与自己无关的数据，则 SIO_RCVALL
If res <> 0 Then
Call WCleanup(s)
Exit Sub
End If
res = WSAAsyncSelect(s, pic.hWnd, &H202, ByVal FD_READ) '设置套接字处于阻塞方式或者非阻塞方式,消息发送的窗口是 pic，即 Form1.Picture1
If res <> 0 Then
Call WCleanup(s)
Exit Sub
End If
End Sub
'接收信息
Public Sub Recibir(s As Long, ByVal RecFormat As Long)
If RecFormat = FD_READ Then
ReDim buffer(2000) '重定义缓冲区大小为 2000
Do
res = recv(s, buffer(0), 2000, 0&) '接收信息
If res > 0 Then
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