MemCopy ByVal retString, ByVal lpStr, nStr
        retString = Left(retString, nStr)
        GetAscIP = retString
    Else
        GetAscIP = "255.255.255.255"
    End If
End Function

Public Function GetHostByAddress(ByVal addr As Long) As String
    Dim phe&, ret&
    Dim heDestHost As HostEnt
    Dim HostName$
    phe = gethostbyaddr(addr, 4, PF_INET)
    If phe Then
        MemCopy heDestHost, ByVal phe, hostent_size
        HostName = String(256, 0)
        MemCopy ByVal HostName, ByVal heDestHost.h_name, 256
        GetHostByAddress = Left(HostName, InStr(HostName, Chr(0)) - 1)
    Else
        GetHostByAddress = WSA_NoName
    End If
End Function

'returns IP as long, in network byte order
Public Function GetHostByNameAlias(ByVal HostName$) As Long
    'Return IP address as a long, in network byte order
    Dim phe&
    Dim heDestHost As HostEnt
    Dim addrList&
    Dim retIP&
    retIP = inet_addr(HostName$)
    If retIP = INADDR_NONE Then
        phe = gethostbyname(HostName$)
        If phe <> 0 Then
            MemCopy heDestHost, ByVal phe, hostent_size
            MemCopy addrList, ByVal heDestHost.h_addr_list, 4
            MemCopy retIP, ByVal addrList, heDestHost.h_length
        Else
            retIP = INADDR_NONE
        End If
    End If
    GetHostByNameAlias = retIP
End Function

'returns your local machines name
Public Function GetLocalHostName() As String
    Dim sName$
    sName = String(256, 0)
    If gethostname(sName, 256) Then
        sName = WSA_NoName
    Else
        If InStr(sName, Chr(0)) Then
            sName = Left(sName, InStr(sName, Chr(0)) - 1)
        End If
    End If
    GetLocalHostName = sName
End Function

    Public Function GetPeerAddress(ByVal s&) As String
    Dim addrlen&
    Dim sa As sockaddr
    addrlen = sockaddr_size
    If getpeername(s, sa, addrlen) Then
        GetPeerAddress = ""
    Else
        GetPeerAddress = SockAddressToString(sa)
    End If
End Function

    Public Function GetPortFromString(ByVal PortStr$) As Long
    'sometimes users provide ports outside the range of a VB
    'integer, so this function returns an integer for a string
    'just to keep an error from happening, it converts the
    'number to a negative if needed
    If Val(PortStr$) > 32767 Then
        GetPortFromString = CInt(Val(PortStr$) - &H10000)
    Else
        GetPortFromString = Val(PortStr$)
    End If
    If Err Then GetPortFromString = 0
End Function

    Function GetProtocolByName(ByVal protocol$) As Long
    Dim tmpShort&
    Dim ppe&
    Dim peDestProt As protoent
    ppe = getprotobyname(protocol)
    If ppe Then
        MemCopy peDestProt, ByVal ppe, protoent_size
        GetProtocolByName = peDestProt.p_proto
    Else
        tmpShort = Val(protocol)
        If tmpShort Then
            GetProtocolByName = htons(tmpShort)
        Else
            GetProtocolByName = SOCKET_ERROR
        End If
    End If
End Function

    Function GetServiceByName(ByVal service$, ByVal protocol$) As Long
    Dim serv&
    Dim pse&
    Dim seDestServ As servent
    pse = getservbyname(service, protocol)
    If pse Then
        MemCopy seDestServ, ByVal pse, servent_size
        GetServiceByName = seDestServ.s_port
    Else
        serv = Val(service)
        If serv Then
            GetServiceByName = htons(serv)
        Else
            GetServiceByName = INVALID_SOCKET
        End If
    End If
End Function

    Function GetSockAddress(ByVal s&) As String
    Dim addrlen&
    Dim ret&
    Dim sa As sockaddr
    Dim szRet$
    szRet = String(32, 0)
    addrlen = sockaddr_size
    If getsockname(s, sa, addrlen) Then
        GetSockAddress = ""
    Else
        GetSockAddress = SockAddressToString(sa)
    End If
End Function

Function GetWSAErrorString(ByVal errnum&) As String
    On Error Resume Next
    Select Case errnum
        Case 10004: GetWSAErrorString = "Interrupted system call."
        Case 10009: GetWSAErrorString = "Bad file number."
        Case 10013: GetWSAErrorString = "Permission Denied."
        Case 10014: GetWSAErrorString = "Bad Address."
        Case 10022: GetWSAErrorString = "Invalid Argument."
        Case 10024: GetWSAErrorString = "Too many open files."
        Case 10035: GetWSAErrorString = "Operation would block."
        Case 10036: GetWSAErrorString = "Operation now in progress."
        Case 10037: GetWSAErrorString = "Operation already in progress."
        Case 10038: GetWSAErrorString = "Socket operation on nonsocket."
        Case 10039: GetWSAErrorString = "Destination address required."
        Case 10040: GetWSAErrorString = "Message too long."
        Case 10041: GetWSAErrorString = "Protocol wrong type for socket."
        Case 10042: GetWSAErrorString = "Protocol not available."
        Case 10043: GetWSAErrorString = "Protocol not supported."
        Case 10044: GetWSAErrorString = "Socket type not supported."
        Case 10045: GetWSAErrorString = "Operation not supported on socket."
        Case 10046: GetWSAErrorString = "Protocol family not supported."
        Case 10047: GetWSAErrorString = "Address family not supported by protocol family."
        Case 10048: GetWSAErrorString = "Address already in use."
        Case 10049: GetWSAErrorString = "Can't assign requested address."
        Case 10050: GetWSAErrorString = "Network is down."
        Case 10051: GetWSAErrorString = "Network is unreachable."
        Case 10052: GetWSAErrorString = "Network dropped connection."
        Case 10053: GetWSAErrorString = "Software caused connection abort."
        Case 10054: GetWSAErrorString = "Connection reset by peer."
        Case 10055: GetWSAErrorString = "No buffer space available."
        Case 10056: GetWSAErrorString = "Socket is already connected."
        Case 10057: GetWSAErrorString = "Socket is not connected."
        Case 10058: GetWSAErrorString = "Can't send after socket shutdown."
        Case 10059: GetWSAErrorString = "Too many references: can't splice."
        Case 10060: GetWSAErrorString = "Connection timed out."
        Case 10061: GetWSAErrorString = "Connection refused."
        Case 10062: GetWSAErrorString = "Too many levels of symbolic links."
        Case 10063: GetWSAErrorString = "File name too long."
        Case 10064: GetWSAErrorString = "Host is down."
        Case 10065: GetWSAErrorString = "No route to host."
        Case 10066: GetWSAErrorString = "Directory not empty."
        Case 10067: GetWSAErrorString = "Too many processes."
        Case 10068: GetWSAErrorString = "Too many users."
        Case 10069: GetWSAErrorString = "Disk quota exceeded."
        Case 10070: GetWSAErrorString = "Stale NFS file handle."
        Case 10071: GetWSAErrorString = "Too many levels of remote in path."
        Case 10091: GetWSAErrorString = "Network subsystem is unusable."
        Case 10092: GetWSAErrorString = "Winsock DLL cannot support this application."
        Case 10093: GetWSAErrorString = "Winsock not initialized."
        Case 10101: GetWSAErrorString = "Disconnect."
        Case 11001: GetWSAErrorString = "Host not found."
        Case 11002: GetWSAErrorString = "Nonauthoritative host not found."
        Case 11003: GetWSAErrorString = "Nonrecoverable error."
        Case 11004: GetWSAErrorString = "Valid name, no data record of requested type."
        Case Else:
    End Select
End Function

Function IpToAddr(ByVal AddrOrIP$) As String
    On Error Resume Next
    IpToAddr = GetHostByAddress(GetHostByNameAlias(AddrOrIP$))
    If Err Then IpToAddr = WSA_NoName
End Function

Function IrcGetAscIp(ByVal IPL$) As String
    'this function is IRC specific, it expects a long ip stored in Network byte order, in a string
    'the kind that would be parsed out of a DCC command string
    On Error GoTo IrcGetAscIPError:
    Dim lpStr&
    Dim nStr&
    Dim retString$
    Dim inn&
    If Val(IPL) > 2147483647 Then
        inn = Val(IPL) - 4294967296#
    Else
        inn = Val(IPL)
    End If
    inn = ntohl(inn)
    retString = String(32, 0)
    lpStr = inet_ntoa(inn)
    If lpStr = 0 Then
        IrcGetAscIp = "0.0.0.0"
        Exit Function
    End If
    nStr = lstrlen(lpStr)
    If nStr > 32 Then nStr = 32
    MemCopy ByVal retString, ByVal lpStr, nStr
    retString = Left(retString, nStr)
    IrcGetAscIp = retString
    Exit Function
IrcGetAscIPError:
    IrcGetAscIp = "0.0.0.0"
    Exit Function
    Resume
End Function

Function IrcGetLongIp(ByVal AscIp$) As String
    'this function converts an ascii ip string into a long ip in network byte order
    'and stick it in a string suitable for use in a DCC command.
    On Error GoTo IrcGetLongIpError:
    Dim inn&
    inn = inet_addr(AscIp)
    inn = htonl(inn)
    If inn < 0 Then
        IrcGetLongIp = CVar(inn + 4294967296#)
        Exit Function
    Else
        IrcGetLongIp = CVar(inn)
        Exit Function
    End If
    Exit Function
IrcGetLongIpError:
    IrcGetLongIp = "0"
    Exit Function
    Resume
End Function

Public Function ListenForConnect(ByVal Port&, ByVal HWndToMsg&) As Long
    Dim s&, dummy&
    Dim SelectOps&
    Dim sockin As sockaddr
    sockin = saZero     'zero out the structure
    sockin.sin_family = AF_INET
    sockin.sin_port = htons(Port)
    If sockin.sin_port = INVALID_SOCKET Then
        ListenForConnect = INVALID_SOCKET
        Exit Function
    End If
    sockin.sin_addr = htonl(INADDR_ANY)
    If sockin.sin_addr = INADDR_NONE Then
        ListenForConnect = INVALID_SOCKET
        Exit Function
    End If
    s = socket(PF_INET, SOCK_STREAM, 0)
    If s < 0 Then
        ListenForConnect = INVALID_SOCKET
        Exit Function
    End If
    If bind(s, sockin, sockaddr_size) Then
        If s > 0 Then
            dummy = closesocket(s)
        End If
        ListenForConnect = INVALID_SOCKET
        Exit Function
    End If
    SelectOps = FD_READ Or FD_WRITE Or FD_CLOSE Or FD_ACCEPT
    If WSAAsyncSelect(s, HWndToMsg, ByVal 1025, ByVal SelectOps) Then
        If s > 0 Then
            dummy = closesocket(s)
        End If
        ListenForConnect = SOCKET_ERROR
        Exit Function
    End If
    
    If listen(s, 1) Then
        If s > 0 Then
            dummy = closesocket(s)
        End If
        ListenForConnect = INVALID_SOCKET
        Exit Function
    End If
    ListenForConnect = s
End Function

Public Function SendData(ByVal s&, vMessage As Variant) As Long
    Dim TheMsg() As Byte, sTemp$
    TheMsg = ""
    Select Case VarType(vMessage)
        Case 8209   'byte array
            sTemp = vMessage
            TheMsg = sTemp
        Case 8      'string, if we recieve a string, its assumed we are linemode
                sTemp = StrConv(vMessage, vbFromUnicode)
        Case Else
            sTemp = CStr(vMessage)
                sTemp = StrConv(vMessage, vbFromUnicode)
    End Select
    TheMsg = sTemp
    If UBound(TheMsg) > -1 Then
        SendData = send(s, TheMsg(0), UBound(TheMsg) + 1, 0)
    End If
End Function

Public Function SockAddressToString(sa As sockaddr) As String
    SockAddressToString = GetAscIP(sa.sin_addr) & ":" & ntohs(sa.sin_port)
End Function

Public Function StartWinsock(sDescription As String) As Boolean
    Dim StartupData As WSADataType
    If Not WSAStartedUp Then
        If Not WSAStartup(&H101, StartupData) Then
            WSAStartedUp = True
            Debug.Print "wVersion="; StartupData.wVersion, "wHighVersion="; StartupData.wHighVersion
            Debug.Print "If wVersion == 257 then everything is kewl"
            Debug.Print "szDescription="; StartupData.szDescription
            Debug.Print "szSystemStatus="; StartupData.szSystemStatus
            Debug.Print "iMaxSockets="; StartupData.iMaxSockets, "iMaxUdpDg="; StartupData.iMaxUdpDg
            sDescription = StartupData.szDescription
        Else
            WSAStartedUp = False
        End If
    End If
    StartWinsock = WSAStartedUp
End Function

Public Function WSAMakeSelectReply(TheEvent%, TheError%) As Long
    WSAMakeSelectReply = (TheError * &H10000) + (TheEvent And &HFFFF&)
End Function