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sockets.prg
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sockets.prg
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If .F.
? "Creado por Pablo Pioli"
Endif
#include IFOX.H
#define SOCKET_ERROR -1
#define INVALID_SOCKET -1
#define WSADATA_SIZE 398
#define WS_VERSION 514
#define INADDR_NONE -1
#define SOMAXCONN 0x7FFFFFFF
* Address Family Constants
#define AF_INET 2
#define AF_IPX 6
#define AF_NETBIOS 17
* Socket Type Constants
#define SOCK_STREAM 1
#define SOCK_DGRAM 2
#define SOCK_RAW 3
#define SOCK_RDM 4
#define SOCK_SEQPACKET 5
* Protocol Constants
#define IPPROTO_IP 0
#define IPPROTO_TCP 6
#define IPPROTO_UDP 17
#define IPPROTO_RAW 255
************************* SOCKETS CLASS ********************************
****************************************************************************
Define Class Sockets as iFox of iFox.PRG OlePublic
StartOK = .F.
SocketClosed = .F.
Response = ""
Hidden Sockets[1]
Hidden UDPSockets[1, 3]
Hidden ListenerSockets[1]
PingAddress = ""
PingTime = 0
PingResponseSize = 0
PingError = 0
***
* Function eInit
***
Protected Function eInit()
Local cData, lRes
* Declare Winsock 2 functions
this.StartOK = this.DeclareWinAPI()
* Start Sockets
If this.StartOK
cData = Replicate(Chr(0), WSADATA_SIZE)
If WS_StartUp(WS_VERSION, @cData) <> 0
this.StartOK = .F.
Endif
Endif
EndFunc
***
* Function DeclareWinAPI
***
Hidden Function DeclareWinAPI()
Local lRes, cError
Private lStartSocketError
* Trap Errors (Users may have an older version of Winsock)
lStartSocketError = .F.
cError = On("Error")
On Error WS2_Error()
Declare Integer WSAStartup in WS2_32 as WS_StartUp Integer wVerRq, String @lpWSAData
Declare Integer WSACleanup in WS2_32 as WS_CleanUp
Declare Integer WSAGetLastError in WS2_32 as WS_GetLastError
Declare Integer socket in WS2_32 as WS_CreateSocket Integer af, Integer Type, Integer Protocol
Declare Integer closesocket in WS2_32 as WS_CloseSocket Integer hSocket
Declare Integer connect in WS2_32 as WS_Connect Integer hSocket, String sockaddr, Integer Len
Declare Integer send in WS2_32 as WS_Send Integer hSocket, String Buffer, Integer Len, Integer Flags
Declare Integer recv in WS2_32 as WS_Receive Integer hSocket, String Buffer, Integer Len, Integer Flags
Declare Integer select in WS2_32 as WS_Status Integer nfds, String @Read, String @Write, String @Errors, String TimeOut
Declare Integer sendto in WS2_32 as WS_SendTo Integer s, String @buf, Integer buflen, Integer wsflags, String @sendto, Integer tolen
Declare Long bind in WS2_32 as WS_Bind Integer hSocket, String SockAddr, Integer NameLen
Declare Long listen in WS2_32 as WS_Listen Integer hSocket, Long BackLog
Declare Long accept in WS2_32 as WS_Accept Integer hSocket, String @SockAddr, Long @NameLen
Declare Long getsockname in WS2_32 as WS_GetSocketName Integer hSocket, String @SockAddr, Long @NameLen
Declare Long getpeername in WS2_32 as WS_GetPeerName Integer hSocket, String @SockAddr, Long @NameLen
Declare Long inet_addr in WS2_32 as WS_IPtoNum String cp
Declare String inet_ntoa in WS2_32 as WS_NumtoIP Long nAddr
Declare Short htons in WS2_32 Long hostshort
Declare Long ntohs in WS2_32 Short x
Declare Integer gethostname in WS2_32 String @lpHostName, Integer iHostNameLenght
Declare Integer gethostbyname in WS2_32 String lpHostName
Declare Integer gethostbyaddr in WS2_32 Integer @addres, Integer len, Integer type
Declare Integer RtlMoveMemory in Win32API String @lpDest, Long nSource, Integer nBytes
Declare Integer RtlMoveMemory in Win32API As RtlMoveMemory2 String @lpDest, Long @nSource, Integer nBytes
On Error &cError
* Get Status
If lStartSocketError
lRes = .F.
else
lRes = .T.
Endif
Return(lRes)
***
* Function eDestroy
***
Protected Function eDestroy()
If !this.StartOK
Return
Endif
WS_CleanUp()
EndFunc
***
* Function Connect
***
Function Connect(cHost, nPort)
Local nSocket, nAddress, cAddress
If !this.StartOK
Return(0)
Endif
nSocket = 0
nAddress = this.GetAddressLong(cHost)
If nAddress <> INADDR_NONE
*!* Declare Long WSASocket in WS2_32 Integer iAddressFamily, Integer iType, Integer iProtocol, String lpProtocolInfo, Long lpGroup, Long dwFlags
*!* lcProtInfo = ""
*!* x = ""
*!* x = x + num2dword(0) &&| DWORD dwServiceFlags1; 0:4
*!* x = x + num2dword(0) &&| DWORD dwServiceFlags2; 4:4
*!* x = x + num2dword(0) &&| DWORD dwServiceFlags3; 8:4
*!* x = x + num2dword(0) &&| DWORD dwServiceFlags4; 12:4
*!* x = x + num2dword(0) &&| DWORD dwProviderFlags; 16:4
*!* x = x + Replicate(" ", 16) &&| GUID ProviderId; 20:16
*!* x = x + num2dword(0) &&| DWORD dwCatalogEntryId; 36:4
*!* for tt = 1 to 8
*!* x = x + num2dword(0) &&| WSAPROTOCOLCHAIN ProtocolChain; 40:32
*!* Next
*!* x = x + num2dword(0) &&| int iVersion; 72:4
*!* x = x + num2dword(AF_INET) &&| int iAddressFamily; 76:4 --
*!* x = x + num2dword(0) &&| int iMaxSockAddr; 80:4
*!* x = x + num2dword(0) &&| int iMinSockAddr; 84:4
*!* x = x + num2dword(SOCK_STREAM) &&| int iSocketType; 88:4 --
*!* x = x + num2dword(IPPROTO_TCP) &&| int iProtocol; 92:4 ---
*!* x = x + num2dword(0) &&| int iProtocolMaxOffset; 96:4
*!* x = x + num2dword(0) &&| int iNetworkByteOrder; 100:4
*!* x = x + num2dword(0) &&| int iSecurityScheme; 104:4 ---
*!* x = x + num2dword(0) &&| DWORD dwMessageSize; 108:4
*!* x = x + num2dword(0) &&| DWORD dwProviderReserved; 112:4
*!* x = x + Replicate(" ", 256) &&| TCHAR szProt[WSAPROTOCOL_LEN+1]; 116:256
*!* a = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, x, 0, 0)
nSocket = WS_CreateSocket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
cAddress = ""
cAddress = cAddress + APINumtoStr(AF_INET, 2)
cAddress = cAddress + APINumtoStr(htons(nPort), 2)
If nAddress >= 0
cAddress = cAddress + APINumtoStr(nAddress, 4)
else
cAddress = cAddress + this.NumToLong(nAddress)
Endif
cAddress = cAddress + Replicate(Chr(0), 8)
If WS_Connect(nSocket, cAddress, Len(cAddress)) == SOCKET_ERROR
WS_CloseSocket(nSocket)
nSocket = 0
else
Dimension this.Sockets[ALen(this.Sockets) + 1]
this.Sockets[ALen(this.Sockets)] = nSocket
Endif
Endif
Return(nSocket)
***
* Function Connect
***
Function ConnectUDP(cHost, nPort)
Local nSocket, nAddress, cAddress
If !this.StartOK
Return(0)
Endif
nSocket = 0
nAddress = this.GetAddressLong(cHost)
If nAddress <> INADDR_NONE
nSocket = WS_CreateSocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
Dimension this.UDPSockets[ALen(this.UDPSockets, 1) + 1, ALen(this.UDPSockets, 2)]
this.UDPSockets[ALen(this.UDPSockets, 1), 1] = nSocket
this.UDPSockets[ALen(this.UDPSockets, 1), 2] = cHost
this.UDPSockets[ALen(this.UDPSockets, 1), 3] = nPort
Endif
Return(nSocket)
***
* Function GetAddressLong
***
Hidden Function GetAddressLong(cHost)
Local nRes, cIP
nRes = WS_IPtoNum(cHost)
If nRes == INADDR_NONE
cIP = this.GetIPfromName(cHost)
If At(",", cIP) <> 0
cIP = Left(cIP, At(",", cIP) - 1)
Endif
nRes = WS_IPtoNum(cIP)
Endif
Return(nRes)
***
* Function Close
***
Function Close(nSocket)
Local nCont
If !this.StartOK
Return
Endif
For nCont = 2 to ALen(this.Sockets)
If this.Sockets[nCont] == nSocket
ADel(this.Sockets, nCont)
Dimension this.Sockets[ALen(this.Sockets) - 1]
Exit
Endif
Next
For nCont = 2 to ALen(this.ListenerSockets)
If this.ListenerSockets[nCont] == nSocket
ADel(this.ListenerSockets, nCont)
Dimension this.ListenerSockets[ALen(this.ListenerSockets) - 1]
Exit
Endif
Next
WS_CloseSocket(nSocket)
EndFunc
***
* Function CloseUDP
***
Function CloseUDP(nSocket)
Local nCont
If !this.StartOK
Return
Endif
For nCont = 2 to ALen(this.UDPSockets, 1)
If this.UDPSockets[nCont, 1] == nSocket
ADel(this.UDPSockets, nCont)
Dimension this.UDPSockets[ALen(this.UDPSockets, 1) - 1, ALen(this.UDPSockets, 2)]
Exit
Endif
Next
WS_CloseSocket(nSocket)
EndFunc
***
* Function Listen
***
Function Listen(nPort, cIP)
Local nSocket, cAddress, lRes
If !this.StartOK
Return(0)
Endif
If (Type("cIP") <> "C") .OR. (Empty(cIP))
cIP = this.IPAddress()
If At(",", cIP) <> 0
cIP = Left(cIP, At(",", cIP) - 1)
Endif
Endif
nSocket = WS_CreateSocket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
If nSocket > 0 Then
lRes = .F.
cAddress = ""
cAddress = cAddress + APINumtoStr(AF_INET, 2)
cAddress = cAddress + APINumtoStr(htons(nPort), 2)
cAddress = cAddress + this.NumToLong(this.GetAddressLong(cIP))
cAddress = cAddress + Replicate(APINumtoStr(0, 1), 8)
If WS_Bind(nSocket, cAddress, Len(cAddress)) == 0
If WS_Listen(nSocket, SOMAXCONN) == 0
Dimension this.ListenerSockets[ALen(this.ListenerSockets) + 1]
this.ListenerSockets[ALen(this.ListenerSockets)] = nSocket
lRes = .T.
Endif
Endif
If !lRes
WS_CloseSocket(nSocket)
nSocket = 0
Endif
Endif
Return(nSocket)
***
* Function Send
***
Function Send(nSocket, cData)
Local lRes, cBuffer1, cBuffer2, cBuffer3, nCont
If !this.StartOK
Return(.F.)
Endif
* Prepare response
lRes = .F.
* Build string buffer
cBuffer1 = APINumtoStr(1, 4)
cBuffer1 = cBuffer1 + APINumtoStr(nSocket, 4)
For nCont = 2 to 64
cBuffer1 = cBuffer1 + APINumtoStr(0, 4)
Next
* Build auxiliar buffers
cBuffer2 = cBuffer1
cBuffer3 = cBuffer1
* Read data
nRes = WS_Status(0, @cBuffer1, @cBuffer2, @cBuffer3, APINumtoStr(2, 4) + APINumtoStr(0, 4))
* Process results
If nRes <> SOCKET_ERROR
If APIStrtoNum(Left(cBuffer2, 4)) == 1
If WS_Send(nSocket, cData, Len(cData), 0) == Len(cData)
lRes = .T.
Endif
Endif
Endif
Return(lRes)
***
* Function SendUDP
***
Function SendUDP(nSocket, cData)
Local lFound, nCont, nAddress, cAddress
If !this.StartOK
Return(.F.)
Endif
lFound = .F.
For nCont = 2 to ALen(this.UDPSockets, 1)
If this.UDPSockets[nCont, 1] == nSocket
lFound = .T.
Exit
Endif
Next
If !lFound
Return(.F.)
Endif
nAddress = this.GetAddressLong(this.UDPSockets[nCont, 2])
cAddress = ""
cAddress = cAddress + APINumtoStr(AF_INET, 2)
cAddress = cAddress + APINumtoStr(htons(this.UDPSockets[nCont, 3]), 2)
If nAddress >= 0
cAddress = cAddress + APINumtoStr(nAddress, 4)
else
cAddress = cAddress + this.NumToLong(nAddress)
Endif
cAddress = cAddress + Replicate(Chr(0), 8)
Return(WS_SendTo(nSocket, @cData, Len(cData), 0, @cAddress, Len(cAddress)) <> -1)
***
* Function ReadUDP
***
Function ReadUDP(nSocket)
Return(this.Read(nSocket))
***
* Function Read
***
Function Read(nSocket)
Local cRes, cBuffer1, cBuffer2, cBuffer3, nCont
Local cReadBuffer, nRead
If !this.StartOK
Return("")
Endif
* Prepare response
cRes = ""
this.SocketClosed = .F.
* Build string buffer
cBuffer1 = APINumtoStr(1, 4)
cBuffer1 = cBuffer1 + APINumtoStr(nSocket, 4)
For nCont = 2 to 64
cBuffer1 = cBuffer1 + APINumtoStr(0, 4)
Next
* Build auxiliar buffers
cBuffer2 = cBuffer1
cBuffer3 = cBuffer1
* Read data
nRes = WS_Status(0, @cBuffer1, @cBuffer2, @cBuffer3, APINumtoStr(0, 4) + APINumtoStr(0, 4))
* Process results
If nRes <> SOCKET_ERROR
* Readable sockets
If APIStrtoNum(Left(cBuffer1, 4)) == 1
cReadBuffer = Replicate(Chr(0), 8192)
nRead = WS_Receive(nSocket, @cReadBuffer, Len(cReadBuffer), 0)
If nRead > 0
cRes = Left(cReadBuffer, nRead)
else
this.SocketClosed = .T.
Endif
Endif
Endif
Return(cRes)
***
* Function AcceptConnections
***
Function AcceptConnections(nSocket)
Local cBuffer1, cBuffer2, cBuffer3, nCont, nRes
Local cAux, nAux
If !this.StartOK
Return(0)
Endif
* Build string buffer
cBuffer1 = APINumtoStr(1, 4)
cBuffer1 = cBuffer1 + APINumtoStr(nSocket, 4)
For nCont = 2 to 64
cBuffer1 = cBuffer1 + APINumtoStr(0, 4)
Next
* Build auxiliar buffers
cBuffer2 = cBuffer1
cBuffer3 = cBuffer1
* Read data
nRes = WS_Status(0, @cBuffer1, @cBuffer2, @cBuffer3, APINumtoStr(0, 4) + APINumtoStr(0, 4))
* Process results
If nRes <> SOCKET_ERROR
* Readable sockets
If APIStrtoNum(Left(cBuffer1, 4)) == 1
cAux = Replicate(Chr(0), 2 + 2 + 4 + 8)
nAux = Len(cAux)
nRes = WS_Accept(nSocket, @cAux, @nAux)
else
nRes = 0
Endif
else
nRes = 0
Endif
Return(nRes)
***
* Function SendReceive
***
Function SendReceive(nSocket, cData, nTimeOut, nDelayBetweenRetries)
Local lRes, tStart, cData
If !this.StartOK
Return(.F.)
Endif
lRes = .F.
this.Response = ""
If Type("nTimeOut") <> "N"
nTimeOut = 10
Endif
If Type("nDelayBetweenRetries") <> "N"
nDelayBetweenRetries = 0
Endif
If this.Send(nSocket, cData)
tStart = DateTime()
Do While .T.
cData = this.Read(nSocket)
If !Empty(cData)
this.Response = cData
lRes = .T.
Exit
else
If this.SocketClosed
lRes = .F.
Exit
Endif
Endif
If nDelayBetweenRetries <> 0
Win32Delay(nDelayBetweenRetries)
Endif
If DateTime() - tStart > nTimeOut
lRes = .F.
Exit
Endif
Enddo
Endif
Return(lRes)
***
* Function WaitFor
***
Function WaitFor(nSocket, cPattern, nTimeOut)
Local lRes, tStart, cData
If !this.StartOK
Return(.F.)
Endif
lRes = .F.
If Type("nTimeOut") <> "N"
nTimeOut = 10
Endif
If Type("cPattern") <> "C"
cPattern = ""
Endif
this.Response = ""
tStart = DateTime()
Do While .T.
cData = this.Read(nSocket)
If !Empty(cData)
this.Response = this.Response + cData
If (Len(cPattern) == 0) .OR. (AT(cPattern, this.Response) <> 0)
lRes = .T.
Exit
Endif
else
If this.SocketClosed
lRes = .F.
Exit
Endif
Endif
If DateTime() - tStart > nTimeOut
lRes = .F.
Exit
Endif
Enddo
Return(lRes)
***
* Function WaitForSize
***
Function WaitForSize(nSocket, nSize, nTimeOut)
Local lRes, tStart, cData
If !this.StartOK
Return(.F.)
Endif
lRes = .F.
If Type("nTimeOut") <> "N"
nTimeOut = 10
Endif
this.Response = ""
tStart = DateTime()
Do While .T.
cData = this.Read(nSocket)
If !Empty(cData)
this.Response = this.Response + cData
If Len(this.Response) >= nSize
lRes = .T.
Exit
Endif
else
If this.SocketClosed
lRes = .F.
Exit
Endif
Endif
If DateTime() - tStart > nTimeOut
lRes = .F.
Exit
Endif
Enddo
Return(lRes)
***
* Function GetLocalHost
***
Function GetLocalHost(nSocket)
Local nCont, cRes, cAddress, nLen
If !this.StartOK
Return("")
Endif
For nCont = 2 to ALen(this.ListenerSockets)
If this.ListenerSockets[nCont] == nSocket
Return("")
Endif
Next
cRes = ""
cAddress = Replicate(Chr(0), 2 + 2 + 4 + 8)
nLen = Len(cAddress)
If WS_GetSocketName(nSocket, @cAddress, @nLen) <> SOCKET_ERROR
cRes = WS_NumtoIP(APIStrtoNum(SubStr(cAddress, 5, 4)))
Endif
Return(cRes)
***
* Function GetLocalHostIP
***
Function GetLocalHostIP(nSocket)
Local nCont, cRes, cAddress, nLen
If !this.StartOK
Return("")
Endif
For nCont = 2 to ALen(this.ListenerSockets)
If this.ListenerSockets[nCont] == nSocket
Return("")
Endif
Next
cRes = ""
cAddress = Replicate(Chr(0), 2 + 2 + 4 + 8)
nLen = Len(cAddress)
If WS_GetSocketName(nSocket, @cAddress, @nLen) <> SOCKET_ERROR
cRes = WS_NumtoIP(APIStrtoNum(SubStr(cAddress, 5, 4)))
Endif
Return(cRes)
***
* Function GetRemoteHost
***
Function GetRemoteHost(nSocket)
Local nCont, cRes, cAddress, nLen
If !this.StartOK
Return("")
Endif
For nCont = 2 to ALen(this.ListenerSockets)
If this.ListenerSockets[nCont] == nSocket
Return("")
Endif
Next
For nCont = 2 to ALen(this.ListenerSockets)
If this.ListenerSockets[nCont] == nSocket
Return("")
Endif
Next
cRes = ""
cAddress = Replicate(Chr(0), 2 + 2 + 4 + 8)
nLen = Len(cAddress)
If WS_GetPeerName(nSocket, @cAddress, @nLen) <> SOCKET_ERROR
cRes = WS_NumtoIP(APIStrtoNum(SubStr(cAddress, 5, 4)))
Endif
Return(cRes)
***
* Function GetRemoteHostIP
***
Function GetRemoteHostIP(nSocket)
Local nCont, cRes, cAddress, nLen
If !this.StartOK
Return("")
Endif
For nCont = 2 to ALen(this.ListenerSockets)
If this.ListenerSockets[nCont] == nSocket
Return("")
Endif
Next
cRes = ""
cAddress = Replicate(Chr(0), 2 + 2 + 4 + 8)
nLen = Len(cAddress)
If WS_GetPeerName(nSocket, @cAddress, @nLen) <> SOCKET_ERROR
cRes = WS_NumtoIP(APIStrtoNum(SubStr(cAddress, 5, 4)))
Endif
Return(cRes)
***
* Function GetPort
***
Function GetPort(nSocket)
Local nCont, nRes, cAddress, nLen
If !this.StartOK
Return(-1)
Endif
cAddress = Replicate(Chr(0), 2 + 2 + 4 + 8)
nLen = Len(cAddress)
If WS_GetSocketName(nSocket, @cAddress, @nLen) <> SOCKET_ERROR
nRes = ntohs(APIStrtoNum(SubStr(cAddress, 3, 4)))
else
nRes = -1
Endif
Return(nRes)
***
* Function IPAddress
***
Function IPAddress()
Local cRes
If !this.StartOK
Return("")
Endif
cHostName = Space(256)
If gethostname(@cHostName, 256) <> SOCKET_ERROR
cRes = this.GetIPFromName(cHostName)
else
cRes = ""
Endif
Return(cRes)
***
* Function GetIPFromName
***
Function GetIPFromName(cHost)
Local cRes, nHostAddr, cWSHostEnt
Local nHostEnt_AddrList, nHostEnt_Lenght, cHostIP_Addr, nHostIP_Addr
Local cTempIP_Addr, nCont
If !this.StartOK
Return("")
Endif
cRes = ""
nHostAddr = gethostbyname(AllTrim(cHost))
If nHostAddr <> 0
cWSHostEnt = Replicate(Chr(0), 4 + 4 + 2 + 2 + 4)
RtlMoveMemory(@cWSHostEnt, nHostAddr, 16)
nHostEnt_AddrList = this.StrToLong(SubStr(cWSHostEnt, 13, 4))
nHostEnt_Lenght = this.StrToInt(SubStr(cWSHostEnt, 11, 2))
Do While .T.
cHostIP_Addr = Replicate(Chr(0), 4)
RtlMoveMemory(@cHostIP_Addr, nHostEnt_AddrList, 4)
nHostIP_Addr = this.StrToLong(cHostIP_Addr)
If nHostIP_Addr == 0
Exit
else
cRes = cRes + IIF(Empty(cRes), "", ",")
Endif
cTempIP_Addr = Replicate(Chr(0), nHostEnt_Lenght)
RtlMoveMemory(@cTempIP_Addr, nHostIP_Addr, nHostEnt_Lenght)
For nCont = 1 to nHostEnt_Lenght
cRes = cRes + Transform(Asc(SubStr(cTempIP_Addr, nCont, 1))) + ;
IIF(nCont = nHostEnt_Lenght, "", ".")
Next
nHostEnt_AddrList = nHostEnt_AddrList + 4
Enddo
Endif
Return(cRes)
***
* Function GetNameFromIP
***
Function GetNameFromIP(cIP)
Local nIP, nHostEnt, cHostEnt
If !this.StartOK
Return("")
Endif
cRes = ""
nIP = WS_IPtoNum(cIP)
nHostEnt = gethostbyaddr(@nIP, 4, AF_INET)
If nHostEnt <> 0
cHostEnt = this.GetMemBuf(nHostEnt, 16)
cRes = this.GetMemStr(this.Buf2DWord(SubStr(cHostEnt, 1, 4)))
Endif
Return(cRes)