diff options
Diffstat (limited to 'mac/tclMacSock.c')
| -rw-r--r-- | mac/tclMacSock.c | 2788 |
1 files changed, 0 insertions, 2788 deletions
diff --git a/mac/tclMacSock.c b/mac/tclMacSock.c deleted file mode 100644 index 35ecf9a..0000000 --- a/mac/tclMacSock.c +++ /dev/null @@ -1,2788 +0,0 @@ -/* - * tclMacSock.c - * - * Channel drivers for Macintosh sockets. - * - * Copyright (c) 1996-1997 Sun Microsystems, Inc. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - */ - -#include "tclInt.h" -#include "tclPort.h" -#include "tclMacInt.h" -#include <AddressXlation.h> -#include <Aliases.h> -#undef Status -#include <Devices.h> -#include <Errors.h> -#include <Events.h> -#include <Files.h> -#include <Gestalt.h> -#include <MacTCP.h> -#include <Processes.h> -#include <Strings.h> - -/* - * The following variable is used to tell whether this module has been - * initialized. - */ - -static int initialized = 0; - -/* - * If debugging is on we may drop into the debugger to handle certain cases - * that are not supposed to happen. Otherwise, we change ignore the error - * and most code should handle such errors ok. - */ - -#ifdef NDEBUG - #define Debugger() -#endif - -/* - * The preferred buffer size for Macintosh channels. - */ - -#define CHANNEL_BUF_SIZE 8192 - -/* - * Port information structure. Used to match service names - * to a Tcp/Ip port number. - */ - -typedef struct { - char *name; /* Name of service. */ - int port; /* Port number. */ -} PortInfo; - -/* - * This structure describes per-instance state of a tcp based channel. - */ - -typedef struct TcpState { - TCPiopb pb; /* Parameter block used by this stream. - * This must be in the first position. */ - ProcessSerialNumber psn; /* PSN used to wake up process. */ - StreamPtr tcpStream; /* Macintosh tcp stream pointer. */ - int port; /* The port we are connected to. */ - int flags; /* Bit field comprised of the flags - * described below. */ - int checkMask; /* OR'ed combination of TCL_READABLE and - * TCL_WRITABLE as set by an asynchronous - * event handler. */ - int watchMask; /* OR'ed combination of TCL_READABLE and - * TCL_WRITABLE as set by TcpWatch. */ - Tcl_TcpAcceptProc *acceptProc; /* Proc to call on accept. */ - ClientData acceptProcData; /* The data for the accept proc. */ - wdsEntry dataSegment[2]; /* List of buffers to be written async. */ - rdsEntry rdsarray[5+1]; /* Array used when cleaning out recieve - * buffers on a closing socket. */ - Tcl_Channel channel; /* Channel associated with this socket. */ - int writeBufferSize; /* Size of buffer to hold data for - * asynchronous writes. */ - void *writeBuffer; /* Buffer for async write data. */ - struct TcpState *nextPtr; /* The next socket on the global socket - * list. */ -} TcpState; - -/* - * This structure is used by domain name resolver callback. - */ - -typedef struct DNRState { - struct hostInfo hostInfo; /* Data structure used by DNR functions. */ - int done; /* Flag to determine when we are done. */ - ProcessSerialNumber psn; /* Process to wake up when we are done. */ -} DNRState; - -/* - * The following macros may be used to set the flags field of - * a TcpState structure. - */ - -#define TCP_ASYNC_SOCKET (1<<0) /* The socket is in async mode. */ -#define TCP_ASYNC_CONNECT (1<<1) /* The socket is trying to connect. */ -#define TCP_CONNECTED (1<<2) /* The socket is connected. */ -#define TCP_PENDING (1<<3) /* A SocketEvent is on the queue. */ -#define TCP_LISTENING (1<<4) /* This socket is listening for - * a connection. */ -#define TCP_LISTEN_CONNECT (1<<5) /* Someone has connect to the - * listening port. */ -#define TCP_REMOTE_CLOSED (1<<6) /* The remote side has closed - * the connection. */ -#define TCP_RELEASE (1<<7) /* The socket may now be released. */ -#define TCP_WRITING (1<<8) /* A background write is in progress. */ -#define TCP_SERVER_ZOMBIE (1<<9) /* The server can no longer accept connects. */ - -/* - * The following structure is what is added to the Tcl event queue when - * a socket event occurs. - */ - -typedef struct SocketEvent { - Tcl_Event header; /* Information that is standard for - * all events. */ - TcpState *statePtr; /* Socket descriptor that is ready. */ - StreamPtr tcpStream; /* Low level Macintosh stream. */ -} SocketEvent; - -/* - * Static routines for this file: - */ - -static pascal void CleanUpExitProc _ANSI_ARGS_((void)); -static void ClearZombieSockets _ANSI_ARGS_((void)); -static void CloseCompletionRoutine _ANSI_ARGS_((TCPiopb *pb)); -static TcpState * CreateSocket _ANSI_ARGS_((Tcl_Interp *interp, - int port, CONST char *host, CONST char *myAddr, - int myPort, int server, int async)); -static pascal void DNRCompletionRoutine _ANSI_ARGS_(( - struct hostInfo *hostinfoPtr, - DNRState *dnrStatePtr)); -static void FreeSocketInfo _ANSI_ARGS_((TcpState *statePtr)); -static long GetBufferSize _ANSI_ARGS_((void)); -static OSErr GetHostFromString _ANSI_ARGS_((CONST char *name, - ip_addr *address)); -static OSErr GetLocalAddress _ANSI_ARGS_((unsigned long *addr)); -static void IOCompletionRoutine _ANSI_ARGS_((TCPiopb *pb)); -static void InitMacTCPParamBlock _ANSI_ARGS_((TCPiopb *pBlock, - int csCode)); -static void InitSockets _ANSI_ARGS_((void)); -static TcpState * NewSocketInfo _ANSI_ARGS_((StreamPtr stream)); -static OSErr ResolveAddress _ANSI_ARGS_((ip_addr tcpAddress, - Tcl_DString *dsPtr)); -static void SocketCheckProc _ANSI_ARGS_((ClientData clientData, - int flags)); -static int SocketEventProc _ANSI_ARGS_((Tcl_Event *evPtr, - int flags)); -static void SocketFreeProc _ANSI_ARGS_((ClientData clientData)); -static int SocketReady _ANSI_ARGS_((TcpState *statePtr)); -static void SocketSetupProc _ANSI_ARGS_((ClientData clientData, - int flags)); -static void TcpAccept _ANSI_ARGS_((TcpState *statePtr)); -static int TcpBlockMode _ANSI_ARGS_((ClientData instanceData, int mode)); -static int TcpClose _ANSI_ARGS_((ClientData instanceData, - Tcl_Interp *interp)); -static int TcpGetHandle _ANSI_ARGS_((ClientData instanceData, - int direction, ClientData *handlePtr)); -static int TcpGetOptionProc _ANSI_ARGS_((ClientData instanceData, - Tcl_Interp *interp, CONST char *optionName, - Tcl_DString *dsPtr)); -static int TcpInput _ANSI_ARGS_((ClientData instanceData, - char *buf, int toRead, int *errorCodePtr)); -static int TcpOutput _ANSI_ARGS_((ClientData instanceData, - CONST char *buf, int toWrite, int *errorCodePtr)); -static void TcpWatch _ANSI_ARGS_((ClientData instanceData, - int mask)); -static int WaitForSocketEvent _ANSI_ARGS_((TcpState *infoPtr, - int mask, int *errorCodePtr)); - -pascal void NotifyRoutine ( - StreamPtr tcpStream, - unsigned short eventCode, - Ptr userDataPtr, - unsigned short terminReason, - struct ICMPReport *icmpMsg); - -/* - * This structure describes the channel type structure for TCP socket - * based IO: - */ - -static Tcl_ChannelType tcpChannelType = { - "tcp", /* Type name. */ - (Tcl_ChannelTypeVersion)TcpBlockMode, /* Set blocking or - * non-blocking mode.*/ - TcpClose, /* Close proc. */ - TcpInput, /* Input proc. */ - TcpOutput, /* Output proc. */ - NULL, /* Seek proc. */ - NULL, /* Set option proc. */ - TcpGetOptionProc, /* Get option proc. */ - TcpWatch, /* Initialize notifier. */ - TcpGetHandle /* Get handles out of channel. */ -}; - -/* - * Universal Procedure Pointers (UPP) for various callback - * routines used by MacTcp code. - */ - -ResultUPP resultUPP = NULL; -TCPIOCompletionUPP completeUPP = NULL; -TCPIOCompletionUPP closeUPP = NULL; -TCPNotifyUPP notifyUPP = NULL; - -/* - * Built-in commands, and the procedures associated with them: - */ - -static PortInfo portServices[] = { - {"echo", 7}, - {"discard", 9}, - {"systat", 11}, - {"daytime", 13}, - {"netstat", 15}, - {"chargen", 19}, - {"ftp-data", 20}, - {"ftp", 21}, - {"telnet", 23}, - {"telneto", 24}, - {"smtp", 25}, - {"time", 37}, - {"whois", 43}, - {"domain", 53}, - {"gopher", 70}, - {"finger", 79}, - {"hostnames", 101}, - {"sunrpc", 111}, - {"nntp", 119}, - {"exec", 512}, - {"login", 513}, - {"shell", 514}, - {"printer", 515}, - {"courier", 530}, - {"uucp", 540}, - {NULL, 0}, -}; - -typedef struct ThreadSpecificData { - /* - * Every open socket has an entry on the following list. - */ - - TcpState *socketList; -} ThreadSpecificData; - -static Tcl_ThreadDataKey dataKey; - -/* - * Globals for holding information about OS support for sockets. - */ - -static int socketsTestInited = false; -static int hasSockets = false; -static short driverRefNum = 0; -static int socketNumber = 0; -static int socketBufferSize = CHANNEL_BUF_SIZE; -static ProcessSerialNumber applicationPSN; - -/* - *---------------------------------------------------------------------- - * - * InitSockets -- - * - * Load the MacTCP driver and open the name resolver. We also - * create several UPP's used by our code. Lastly, we install - * a patch to ExitToShell to clean up socket connections if - * we are about to exit. - * - * Results: - * 1 if successful, 0 on failure. - * - * Side effects: - * Creates a new event source, loads the MacTCP driver, - * registers an exit to shell callback. - * - *---------------------------------------------------------------------- - */ - -#define gestaltMacTCPVersion 'mtcp' -static void -InitSockets() -{ - ParamBlockRec pb; - OSErr err; - long response; - ThreadSpecificData *tsdPtr; - - if (! initialized) { - /* - * Do process wide initialization. - */ - - initialized = 1; - - if (Gestalt(gestaltMacTCPVersion, &response) == noErr) { - hasSockets = true; - } else { - hasSockets = false; - } - - if (!hasSockets) { - return; - } - - /* - * Load MacTcp driver and name server resolver. - */ - - - pb.ioParam.ioCompletion = 0L; - pb.ioParam.ioNamePtr = "\p.IPP"; - pb.ioParam.ioPermssn = fsCurPerm; - err = PBOpenSync(&pb); - if (err != noErr) { - hasSockets = 0; - return; - } - driverRefNum = pb.ioParam.ioRefNum; - - socketBufferSize = GetBufferSize(); - err = OpenResolver(NULL); - if (err != noErr) { - hasSockets = 0; - return; - } - - GetCurrentProcess(&applicationPSN); - /* - * Create UPP's for various callback routines. - */ - - resultUPP = NewResultProc(DNRCompletionRoutine); - completeUPP = NewTCPIOCompletionProc(IOCompletionRoutine); - closeUPP = NewTCPIOCompletionProc(CloseCompletionRoutine); - notifyUPP = NewTCPNotifyProc(NotifyRoutine); - - /* - * Install an ExitToShell patch. We use this patch instead - * of the Tcl exit mechanism because we need to ensure that - * these routines are cleaned up even if we crash or are forced - * to quit. There are some circumstances when the Tcl exit - * handlers may not fire. - */ - - TclMacInstallExitToShellPatch(CleanUpExitProc); - } - - /* - * Do per-thread initialization. - */ - - tsdPtr = (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - if (tsdPtr == NULL) { - tsdPtr = TCL_TSD_INIT(&dataKey); - tsdPtr->socketList = NULL; - Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); - } -} - -/* - *---------------------------------------------------------------------- - * - * TclpFinalizeSockets -- - * - * Invoked during exit clean up to deinitialize the socket module. - * - * Results: - * None. - * - * Side effects: - * Removed event source. - * - *---------------------------------------------------------------------- - */ - -void -TclpFinalizeSockets() -{ - ThreadSpecificData *tsdPtr; - - tsdPtr = (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - if (tsdPtr != NULL) { - Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); - } -} - -/* - *---------------------------------------------------------------------- - * - * TclpHasSockets -- - * - * This function determines whether sockets are available on the - * current system and returns an error in interp if they are not. - * Note that interp may be NULL. - * - * Results: - * Returns TCL_OK if the system supports sockets, or TCL_ERROR with - * an error in interp. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -int -TclpHasSockets( - Tcl_Interp *interp) /* Interp for error messages. */ -{ - InitSockets(); - - if (hasSockets) { - return TCL_OK; - } - if (interp != NULL) { - Tcl_AppendResult(interp, "sockets are not available on this system", - NULL); - } - return TCL_ERROR; -} - -/* - *---------------------------------------------------------------------- - * - * SocketSetupProc -- - * - * This procedure is invoked before Tcl_DoOneEvent blocks waiting - * for an event. - * - * Results: - * None. - * - * Side effects: - * Adjusts the block time if needed. - * - *---------------------------------------------------------------------- - */ - -static void -SocketSetupProc( - ClientData data, /* Not used. */ - int flags) /* Event flags as passed to Tcl_DoOneEvent. */ -{ - TcpState *statePtr; - Tcl_Time blockTime = { 0, 0 }; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return; - } - - /* - * Check to see if there is a ready socket. If so, poll. - */ - - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if (statePtr->flags & TCP_RELEASE) { - continue; - } - if (SocketReady(statePtr)) { - Tcl_SetMaxBlockTime(&blockTime); - break; - } - } -} - -/* - *---------------------------------------------------------------------- - * - * SocketCheckProc -- - * - * This procedure is called by Tcl_DoOneEvent to check the socket - * event source for events. - * - * Results: - * None. - * - * Side effects: - * May queue an event. - * - *---------------------------------------------------------------------- - */ - -static void -SocketCheckProc( - ClientData data, /* Not used. */ - int flags) /* Event flags as passed to Tcl_DoOneEvent. */ -{ - TcpState *statePtr; - SocketEvent *evPtr; - TcpState dummyState; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return; - } - - /* - * Queue events for any ready sockets that don't already have events - * queued (caused by persistent states that won't generate WinSock - * events). - */ - - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - /* - * Check to see if this socket is dead and needs to be cleaned - * up. We use a dummy statePtr whose only valid field is the - * nextPtr to allow the loop to continue even if the element - * is deleted. - */ - - if (statePtr->flags & TCP_RELEASE) { - if (!(statePtr->flags & TCP_PENDING)) { - dummyState.nextPtr = statePtr->nextPtr; - SocketFreeProc(statePtr); - statePtr = &dummyState; - } - continue; - } - - if (!(statePtr->flags & TCP_PENDING) && SocketReady(statePtr)) { - statePtr->flags |= TCP_PENDING; - evPtr = (SocketEvent *) ckalloc(sizeof(SocketEvent)); - evPtr->header.proc = SocketEventProc; - evPtr->statePtr = statePtr; - evPtr->tcpStream = statePtr->tcpStream; - Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL); - } - } -} - -/* - *---------------------------------------------------------------------- - * - * SocketReady -- - * - * This function checks the current state of a socket to see - * if any interesting conditions are present. - * - * Results: - * Returns 1 if an event that someone is watching is present, else - * returns 0. - * - * Side effects: - * Updates the checkMask for the socket to reflect any newly - * detected events. - * - *---------------------------------------------------------------------- - */ - -static int -SocketReady( - TcpState *statePtr) -{ - TCPiopb statusPB; - int foundSomething = 0; - int didStatus = 0; - int amount; - OSErr err; - - if (statePtr->flags & TCP_LISTEN_CONNECT) { - foundSomething = 1; - statePtr->checkMask |= TCL_READABLE; - } - if (statePtr->watchMask & TCL_READABLE) { - if (statePtr->checkMask & TCL_READABLE) { - foundSomething = 1; - } else if (statePtr->flags & TCP_CONNECTED) { - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = statePtr->tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - didStatus = 1; - - /* - * We make the fchannel readable if 1) we get an error, - * 2) there is more data available, or 3) we detect - * that a close from the remote connection has arrived. - */ - - if ((err != noErr) || - (statusPB.csParam.status.amtUnreadData > 0) || - (statusPB.csParam.status.connectionState == 14)) { - statePtr->checkMask |= TCL_READABLE; - foundSomething = 1; - } - } - } - if (statePtr->watchMask & TCL_WRITABLE) { - if (statePtr->checkMask & TCL_WRITABLE) { - foundSomething = 1; - } else if (statePtr->flags & TCP_CONNECTED) { - if (!didStatus) { - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = statePtr->tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - } - - /* - * If there is an error or there if there is room to - * send more data we make the channel writeable. - */ - - amount = statusPB.csParam.status.sendWindow - - statusPB.csParam.status.amtUnackedData; - if ((err != noErr) || (amount > 0)) { - statePtr->checkMask |= TCL_WRITABLE; - foundSomething = 1; - } - } - } - return foundSomething; -} - -/* - *---------------------------------------------------------------------- - * - * InitMacTCPParamBlock-- - * - * Initialize a MacTCP parameter block. - * - * Results: - * None. - * - * Side effects: - * Initializes the parameter block. - * - *---------------------------------------------------------------------- - */ - -static void -InitMacTCPParamBlock( - TCPiopb *pBlock, /* Tcp parmeter block. */ - int csCode) /* Tcp operation code. */ -{ - memset(pBlock, 0, sizeof(TCPiopb)); - pBlock->ioResult = 1; - pBlock->ioCRefNum = driverRefNum; - pBlock->csCode = (short) csCode; -} - -/* - *---------------------------------------------------------------------- - * - * TcpBlockMode -- - * - * Set blocking or non-blocking mode on channel. - * - * Results: - * 0 if successful, errno when failed. - * - * Side effects: - * Sets the device into blocking or non-blocking mode. - * - *---------------------------------------------------------------------- - */ - -static int -TcpBlockMode( - ClientData instanceData, /* Channel state. */ - int mode) /* The mode to set. */ -{ - TcpState *statePtr = (TcpState *) instanceData; - - if (mode == TCL_MODE_BLOCKING) { - statePtr->flags &= ~TCP_ASYNC_SOCKET; - } else { - statePtr->flags |= TCP_ASYNC_SOCKET; - } - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * TcpClose -- - * - * Close the socket. - * - * Results: - * 0 if successful, the value of errno if failed. - * - * Side effects: - * Closes the socket. - * - *---------------------------------------------------------------------- - */ - -static int -TcpClose( - ClientData instanceData, /* The socket to close. */ - Tcl_Interp *interp) /* Interp for error messages. */ -{ - TcpState *statePtr = (TcpState *) instanceData; - StreamPtr tcpStream; - TCPiopb closePB; - OSErr err; - - tcpStream = statePtr->tcpStream; - statePtr->flags &= ~TCP_CONNECTED; - - /* - * If this is a server socket we can't use the statePtr - * param block because it is in use. However, we can - * close syncronously. - */ - - if ((statePtr->flags & TCP_LISTENING) || - (statePtr->flags & TCP_LISTEN_CONNECT)) { - InitMacTCPParamBlock(&closePB, TCPClose); - closePB.tcpStream = tcpStream; - closePB.ioCompletion = NULL; - closePB.csParam.close.ulpTimeoutValue = 60 /* seconds */; - closePB.csParam.close.ulpTimeoutAction = 1 /* 1:abort 0:report */; - closePB.csParam.close.validityFlags = timeoutValue | timeoutAction; - err = PBControlSync((ParmBlkPtr) &closePB); - if (err != noErr) { - Debugger(); - goto afterRelease; - /* panic("error closing server socket"); */ - } - statePtr->flags |= TCP_RELEASE; - - /* - * Server sockets are closed sync. Therefor, we know it is OK to - * release the socket now. - */ - - InitMacTCPParamBlock(&statePtr->pb, TCPRelease); - statePtr->pb.tcpStream = statePtr->tcpStream; - err = PBControlSync((ParmBlkPtr) &statePtr->pb); - if (err != noErr) { - panic("error releasing server socket"); - } - - /* - * Free the buffer space used by the socket and the - * actual socket state data structure. - */ - afterRelease: - - /* - * Have to check whether the pointer is NULL, since we could get here - * on a failed socket open, and then the rcvBuff would never have been - * allocated. - */ - - if (err == noErr) { - ckfree((char *) statePtr->pb.csParam.create.rcvBuff); - } - FreeSocketInfo(statePtr); - return 0; - } - - /* - * If this socket is in the midddle on async connect we can just - * abort the connect and release the stream right now. - */ - - if (statePtr->flags & TCP_ASYNC_CONNECT) { - InitMacTCPParamBlock(&closePB, TCPClose); - closePB.tcpStream = tcpStream; - closePB.ioCompletion = NULL; - err = PBControlSync((ParmBlkPtr) &closePB); - if (err == noErr) { - statePtr->flags |= TCP_RELEASE; - - InitMacTCPParamBlock(&closePB, TCPRelease); - closePB.tcpStream = tcpStream; - closePB.ioCompletion = NULL; - - err = PBControlSync((ParmBlkPtr) &closePB); - } - - /* - * Free the buffer space used by the socket and the - * actual socket state data structure. However, if the - * RELEASE returns an error, then the rcvBuff is usually - * bad, so we can't release it. I think this means we will - * leak the buffer, so in the future, we may want to track the - * buffers separately, and nuke them on our own (or just not - * use MacTCP!). - */ - - if (err == noErr) { - ckfree((char *) closePB.csParam.create.rcvBuff); - } - - FreeSocketInfo(statePtr); - return err; - } - - /* - * Client sockets: - * If a background write is in progress, don't close - * the socket yet. The completion routine for the - * write will take care of it. - */ - - if (!(statePtr->flags & TCP_WRITING)) { - InitMacTCPParamBlock(&statePtr->pb, TCPClose); - statePtr->pb.tcpStream = tcpStream; - statePtr->pb.ioCompletion = closeUPP; - statePtr->pb.csParam.close.userDataPtr = (Ptr) statePtr; - err = PBControlAsync((ParmBlkPtr) &statePtr->pb); - if (err != noErr) { - Debugger(); - statePtr->flags |= TCP_RELEASE; - /* return 0; */ - } - } - - SocketFreeProc(instanceData); - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * CloseCompletionRoutine -- - * - * Handles the close protocol for a Tcp socket. This will do - * a series of calls to release all data currently buffered for - * the socket. This is important to do to as it allows the remote - * connection to recieve and issue it's own close on the socket. - * Note that this function is running at interupt time and can't - * allocate memory or do much else except set state. - * - * Results: - * None. - * - * Side effects: - * The buffers for the socket are flushed. - * - *---------------------------------------------------------------------- - */ - -static void -CloseCompletionRoutine( - TCPiopb *pbPtr) /* Tcp parameter block. */ -{ - TcpState *statePtr; - OSErr err; - - if (pbPtr->csCode == TCPClose) { - statePtr = (TcpState *) (pbPtr->csParam.close.userDataPtr); - } else { - statePtr = (TcpState *) (pbPtr->csParam.receive.userDataPtr); - } - - /* - * It's very bad if the statePtr is nNULL - we should probably panic... - */ - - if (statePtr == NULL) { - Debugger(); - return; - } - - WakeUpProcess(&statePtr->psn); - - /* - * If there is an error we assume the remote side has already - * close. We are done closing as soon as we decide that the - * remote connection has closed. - */ - - if (pbPtr->ioResult != noErr) { - statePtr->flags |= TCP_RELEASE; - return; - } - if (statePtr->flags & TCP_REMOTE_CLOSED) { - statePtr->flags |= TCP_RELEASE; - return; - } - - /* - * If we just did a recieve we need to return the buffers. - * Otherwise, attempt to recieve more data until we recieve an - * error (usually because we have no more data). - */ - - if (statePtr->pb.csCode == TCPNoCopyRcv) { - InitMacTCPParamBlock(&statePtr->pb, TCPRcvBfrReturn); - statePtr->pb.tcpStream = statePtr->tcpStream; - statePtr->pb.ioCompletion = closeUPP; - statePtr->pb.csParam.receive.rdsPtr = (Ptr) statePtr->rdsarray; - statePtr->pb.csParam.receive.userDataPtr = (Ptr) statePtr; - err = PBControlAsync((ParmBlkPtr) &statePtr->pb); - } else { - InitMacTCPParamBlock(&statePtr->pb, TCPNoCopyRcv); - statePtr->pb.tcpStream = statePtr->tcpStream; - statePtr->pb.ioCompletion = closeUPP; - statePtr->pb.csParam.receive.commandTimeoutValue = 1; - statePtr->pb.csParam.receive.rdsPtr = (Ptr) statePtr->rdsarray; - statePtr->pb.csParam.receive.rdsLength = 5; - statePtr->pb.csParam.receive.userDataPtr = (Ptr) statePtr; - err = PBControlAsync((ParmBlkPtr) &statePtr->pb); - } - - if (err != noErr) { - statePtr->flags |= TCP_RELEASE; - } -} -/* - *---------------------------------------------------------------------- - * - * SocketFreeProc -- - * - * This callback is invoked in order to delete - * the notifier data associated with a file handle. - * - * Results: - * None. - * - * Side effects: - * Removes the SocketInfo from the global socket list. - * - *---------------------------------------------------------------------- - */ - -static void -SocketFreeProc( - ClientData clientData) /* Channel state. */ -{ - TcpState *statePtr = (TcpState *) clientData; - OSErr err; - TCPiopb statusPB; - - /* - * Get the status of this connection. We need to do a - * few tests to see if it's OK to release the stream now. - */ - - if (!(statePtr->flags & TCP_RELEASE)) { - return; - } - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = statePtr->tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - if ((statusPB.csParam.status.connectionState == 0) || - (statusPB.csParam.status.connectionState == 2)) { - /* - * If the conection state is 0 then this was a client - * connection and it's closed. If it is 2 then this a - * server client and we may release it. If it isn't - * one of those values then we return and we'll try to - * clean up later. - */ - - } else { - return; - } - - /* - * The Close request is made async. We know it's - * OK to release the socket when the TCP_RELEASE flag - * gets set. - */ - - InitMacTCPParamBlock(&statePtr->pb, TCPRelease); - statePtr->pb.tcpStream = statePtr->tcpStream; - err = PBControlSync((ParmBlkPtr) &statePtr->pb); - if (err != noErr) { - Debugger(); /* Ignoreing leaves stranded stream. Is there an - alternative? */ - } - - /* - * Free the buffer space used by the socket and the - * actual socket state data structure. - */ - - ckfree((char *) statePtr->pb.csParam.create.rcvBuff); - FreeSocketInfo(statePtr); -} - -/* - *---------------------------------------------------------------------- - * - * TcpInput -- - * - * Reads input from the IO channel into the buffer given. Returns - * count of how many bytes were actually read, and an error - * indication. - * - * Results: - * A count of how many bytes were read is returned. A value of -1 - * implies an error occured. A value of zero means we have reached - * the end of data (EOF). - * - * Side effects: - * Reads input from the actual channel. - * - *---------------------------------------------------------------------- - */ - -int -TcpInput( - ClientData instanceData, /* Channel state. */ - char *buf, /* Where to store data read. */ - int bufSize, /* How much space is available - * in the buffer? */ - int *errorCodePtr) /* Where to store error code. */ -{ - TcpState *statePtr = (TcpState *) instanceData; - StreamPtr tcpStream; - OSErr err; - TCPiopb statusPB; - int toRead, dataAvail; - - *errorCodePtr = 0; - errno = 0; - tcpStream = statePtr->tcpStream; - - if (bufSize == 0) { - return 0; - } - toRead = bufSize; - - /* - * First check to see if EOF was already detected, to prevent - * calling the socket stack after the first time EOF is detected. - */ - - if (statePtr->flags & TCP_REMOTE_CLOSED) { - return 0; - } - - /* - * If an asynchronous connect is in progress, attempt to wait for it - * to complete before reading. - */ - - if ((statePtr->flags & TCP_ASYNC_CONNECT) - && ! WaitForSocketEvent(statePtr, TCL_READABLE, errorCodePtr)) { - return -1; - } - - /* - * No EOF, and it is connected, so try to read more from the socket. - * If the socket is blocking, we keep trying until there is data - * available or the socket is closed. - */ - - while (1) { - - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - if (err != noErr) { - Debugger(); - statePtr->flags |= TCP_REMOTE_CLOSED; - return 0; /* EOF */ - } - dataAvail = statusPB.csParam.status.amtUnreadData; - if (dataAvail < bufSize) { - toRead = dataAvail; - } else { - toRead = bufSize; - } - if (toRead != 0) { - /* - * Try to read the data. - */ - - InitMacTCPParamBlock(&statusPB, TCPRcv); - statusPB.tcpStream = tcpStream; - statusPB.csParam.receive.rcvBuff = buf; - statusPB.csParam.receive.rcvBuffLen = toRead; - err = PBControlSync((ParmBlkPtr) &statusPB); - - statePtr->checkMask &= ~TCL_READABLE; - switch (err) { - case noErr: - /* - * The channel remains readable only if this read succeds - * and we had more data then the size of the buffer we were - * trying to fill. Use the info from the call to status to - * determine this. - */ - - if (dataAvail > bufSize) { - statePtr->checkMask |= TCL_READABLE; - } - return statusPB.csParam.receive.rcvBuffLen; - case connectionClosing: - *errorCodePtr = errno = ESHUTDOWN; - statePtr->flags |= TCP_REMOTE_CLOSED; - return 0; - case connectionDoesntExist: - case connectionTerminated: - *errorCodePtr = errno = ENOTCONN; - statePtr->flags |= TCP_REMOTE_CLOSED; - return 0; - case invalidStreamPtr: - default: - *errorCodePtr = EINVAL; - return -1; - } - } - - /* - * No data is available, so check the connection state to - * see why this is the case. - */ - - if (statusPB.csParam.status.connectionState == 14) { - statePtr->flags |= TCP_REMOTE_CLOSED; - return 0; - } - if (statusPB.csParam.status.connectionState != 8) { - Debugger(); - } - statePtr->checkMask &= ~TCL_READABLE; - if (statePtr->flags & TCP_ASYNC_SOCKET) { - *errorCodePtr = EWOULDBLOCK; - return -1; - } - - /* - * In the blocking case, wait until the file becomes readable - * or closed and try again. - */ - - if (!WaitForSocketEvent(statePtr, TCL_READABLE, errorCodePtr)) { - return -1; - } - } -} - -/* - *---------------------------------------------------------------------- - * - * TcpGetHandle -- - * - * Called from Tcl_GetChannelHandle to retrieve handles from inside - * a file based channel. - * - * Results: - * The appropriate handle or NULL if not present. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -TcpGetHandle( - ClientData instanceData, /* The file state. */ - int direction, /* Which handle to retrieve? */ - ClientData *handlePtr) -{ - TcpState *statePtr = (TcpState *) instanceData; - - *handlePtr = (ClientData) statePtr->tcpStream; - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TcpOutput-- - * - * Writes the given output on the IO channel. Returns count of how - * many characters were actually written, and an error indication. - * - * Results: - * A count of how many characters were written is returned and an - * error indication is returned in an output argument. - * - * Side effects: - * Writes output on the actual channel. - * - *---------------------------------------------------------------------- - */ - -static int -TcpOutput( - ClientData instanceData, /* Channel state. */ - CONST char *buf, /* The data buffer. */ - int toWrite, /* How many bytes to write? */ - int *errorCodePtr) /* Where to store error code. */ -{ - TcpState *statePtr = (TcpState *) instanceData; - StreamPtr tcpStream; - OSErr err; - int amount; - TCPiopb statusPB; - - *errorCodePtr = 0; - tcpStream = statePtr->tcpStream; - - /* - * If an asynchronous connect is in progress, attempt to wait for it - * to complete before writing. - */ - - if ((statePtr->flags & TCP_ASYNC_CONNECT) - && ! WaitForSocketEvent(statePtr, TCL_WRITABLE, errorCodePtr)) { - return -1; - } - - /* - * Loop until we have written some data, or an error occurs. - */ - - while (1) { - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - if ((err == connectionDoesntExist) || ((err == noErr) && - (statusPB.csParam.status.connectionState == 14))) { - /* - * The remote connection is gone away. Report an error - * and don't write anything. - */ - - *errorCodePtr = errno = EPIPE; - return -1; - } else if (err != noErr) { - return -1; - } - amount = statusPB.csParam.status.sendWindow - - statusPB.csParam.status.amtUnackedData; - - /* - * Attempt to write the data to the socket if a background - * write isn't in progress and there is room in the output buffers. - */ - - if (!(statePtr->flags & TCP_WRITING) && amount > 0) { - if (toWrite < amount) { - amount = toWrite; - } - - /* We need to copy the data, otherwise the caller may overwrite - * the buffer in the middle of our asynchronous call - */ - - if (amount > statePtr->writeBufferSize) { - /* - * need to grow write buffer - */ - - if (statePtr->writeBuffer != (void *) NULL) { - ckfree(statePtr->writeBuffer); - } - statePtr->writeBuffer = (void *) ckalloc(amount); - statePtr->writeBufferSize = amount; - } - memcpy(statePtr->writeBuffer, buf, amount); - statePtr->dataSegment[0].ptr = statePtr->writeBuffer; - - statePtr->dataSegment[0].length = amount; - statePtr->dataSegment[1].length = 0; - InitMacTCPParamBlock(&statePtr->pb, TCPSend); - statePtr->pb.ioCompletion = completeUPP; - statePtr->pb.tcpStream = tcpStream; - statePtr->pb.csParam.send.wdsPtr = (Ptr) statePtr->dataSegment; - statePtr->pb.csParam.send.pushFlag = 1; - statePtr->pb.csParam.send.userDataPtr = (Ptr) statePtr; - statePtr->flags |= TCP_WRITING; - err = PBControlAsync((ParmBlkPtr) &(statePtr->pb)); - switch (err) { - case noErr: - return amount; - case connectionClosing: - *errorCodePtr = errno = ESHUTDOWN; - statePtr->flags |= TCP_REMOTE_CLOSED; - return -1; - case connectionDoesntExist: - case connectionTerminated: - *errorCodePtr = errno = ENOTCONN; - statePtr->flags |= TCP_REMOTE_CLOSED; - return -1; - case invalidStreamPtr: - default: - return -1; - } - - } - - /* - * The socket wasn't writable. In the non-blocking case, return - * immediately, otherwise wait until the file becomes writable - * or closed and try again. - */ - - if (statePtr->flags & TCP_ASYNC_SOCKET) { - statePtr->checkMask &= ~TCL_WRITABLE; - *errorCodePtr = EWOULDBLOCK; - return -1; - } else if (!WaitForSocketEvent(statePtr, TCL_WRITABLE, errorCodePtr)) { - return -1; - } - } -} - -/* - *---------------------------------------------------------------------- - * - * TcpGetOptionProc -- - * - * Computes an option value for a TCP socket based channel, or a - * list of all options and their values. - * - * Note: This code is based on code contributed by John Haxby. - * - * Results: - * A standard Tcl result. The value of the specified option or a - * list of all options and their values is returned in the - * supplied DString. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -TcpGetOptionProc( - ClientData instanceData, /* Socket state. */ - Tcl_Interp *interp, /* For error reporting - can be NULL.*/ - CONST char *optionName, /* Name of the option to - * retrieve the value for, or - * NULL to get all options and - * their values. */ - Tcl_DString *dsPtr) /* Where to store the computed - * value; initialized by caller. */ -{ - TcpState *statePtr = (TcpState *) instanceData; - int doPeerName = false, doSockName = false, doError = false, doAll = false; - ip_addr tcpAddress; - char buffer[128]; - OSErr err; - Tcl_DString dString; - TCPiopb statusPB; - int errorCode; - size_t len = 0; - - /* - * If an asynchronous connect is in progress, attempt to wait for it - * to complete before accessing the socket state. - */ - - if ((statePtr->flags & TCP_ASYNC_CONNECT) - && ! WaitForSocketEvent(statePtr, TCL_WRITABLE, &errorCode)) { - if (interp) { - /* - * fix the error message. - */ - - Tcl_AppendResult(interp, "connect is in progress and can't wait", - NULL); - } - return TCL_ERROR; - } - - /* - * Determine which options we need to do. Do all of them - * if optionName is NULL. - */ - - if (optionName == (CONST char *) NULL || optionName[0] == '\0') { - doAll = true; - } else { - len = strlen(optionName); - if (!strncmp(optionName, "-peername", len)) { - doPeerName = true; - } else if (!strncmp(optionName, "-sockname", len)) { - doSockName = true; - } else if (!strncmp(optionName, "-error", len)) { - /* SF Bug #483575 */ - doError = true; - } else { - return Tcl_BadChannelOption(interp, optionName, - "error peername sockname"); - } - } - - /* - * SF Bug #483575 - * - * Return error information. Currently we ignore - * this option. IOW, we always return the empty - * string, signaling 'no error'. - * - * FIXME: Get a mac/socket expert to write a correct - * FIXME: implementation. - */ - - if (doAll || doError) { - if (doAll) { - Tcl_DStringAppendElement(dsPtr, "-error"); - Tcl_DStringAppendElement(dsPtr, ""); - } else { - Tcl_DStringAppend (dsPtr, "", -1); - return TCL_OK; - } - } - - /* - * Get status on the stream. Make sure to use a new pb struct because - * the struct in the statePtr may be part of an asyncronous call. - */ - - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = statePtr->tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - if ((err == connectionDoesntExist) || - ((err == noErr) && (statusPB.csParam.status.connectionState == 14))) { - /* - * The socket was probably closed on the other side of the connection. - */ - - if (interp) { - Tcl_AppendResult(interp, "can't access socket info: ", - "connection reset by peer", NULL); - } - return TCL_ERROR; - } else if (err != noErr) { - if (interp) { - Tcl_AppendResult(interp, "unknown socket error", NULL); - } - Debugger(); - return TCL_ERROR; - } - - - /* - * Get the sockname for the socket. - */ - - Tcl_DStringInit(&dString); - if (doAll || doSockName) { - if (doAll) { - Tcl_DStringAppendElement(dsPtr, "-sockname"); - Tcl_DStringStartSublist(dsPtr); - } - tcpAddress = statusPB.csParam.status.localHost; - sprintf(buffer, "%d.%d.%d.%d", tcpAddress>>24, - tcpAddress>>16 & 0xff, tcpAddress>>8 & 0xff, - tcpAddress & 0xff); - Tcl_DStringAppendElement(dsPtr, buffer); - if (ResolveAddress(tcpAddress, &dString) == noErr) { - Tcl_DStringAppendElement(dsPtr, dString.string); - } else { - Tcl_DStringAppendElement(dsPtr, "<unknown>"); - } - sprintf(buffer, "%d", statusPB.csParam.status.localPort); - Tcl_DStringAppendElement(dsPtr, buffer); - if (doAll) { - Tcl_DStringEndSublist(dsPtr); - } - } - - /* - * Get the peername for the socket. - */ - - if ((doAll || doPeerName) && (statePtr->flags & TCP_CONNECTED)) { - if (doAll) { - Tcl_DStringAppendElement(dsPtr, "-peername"); - Tcl_DStringStartSublist(dsPtr); - } - tcpAddress = statusPB.csParam.status.remoteHost; - sprintf(buffer, "%d.%d.%d.%d", tcpAddress>>24, - tcpAddress>>16 & 0xff, tcpAddress>>8 & 0xff, - tcpAddress & 0xff); - Tcl_DStringAppendElement(dsPtr, buffer); - Tcl_DStringSetLength(&dString, 0); - if (ResolveAddress(tcpAddress, &dString) == noErr) { - Tcl_DStringAppendElement(dsPtr, dString.string); - } else { - Tcl_DStringAppendElement(dsPtr, "<unknown>"); - } - sprintf(buffer, "%d", statusPB.csParam.status.remotePort); - Tcl_DStringAppendElement(dsPtr, buffer); - if (doAll) { - Tcl_DStringEndSublist(dsPtr); - } - } - - Tcl_DStringFree(&dString); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TcpWatch -- - * - * Initialize the notifier to watch this channel. - * - * Results: - * None. - * - * Side effects: - * Sets the watchMask for the channel. - * - *---------------------------------------------------------------------- - */ - -static void -TcpWatch(instanceData, mask) - ClientData instanceData; /* The file state. */ - int mask; /* Events of interest; an OR-ed - * combination of TCL_READABLE, - * TCL_WRITABLE and TCL_EXCEPTION. */ -{ - TcpState *statePtr = (TcpState *) instanceData; - - statePtr->watchMask = mask; -} - -/* - *---------------------------------------------------------------------- - * - * NewSocketInfo -- - * - * This function allocates and initializes a new SocketInfo - * structure. - * - * Results: - * Returns a newly allocated SocketInfo. - * - * Side effects: - * Adds the socket to the global socket list, allocates memory. - * - *---------------------------------------------------------------------- - */ - -static TcpState * -NewSocketInfo( - StreamPtr tcpStream) -{ - TcpState *statePtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState)); - statePtr->tcpStream = tcpStream; - statePtr->psn = applicationPSN; - statePtr->flags = 0; - statePtr->checkMask = 0; - statePtr->watchMask = 0; - statePtr->acceptProc = (Tcl_TcpAcceptProc *) NULL; - statePtr->acceptProcData = (ClientData) NULL; - statePtr->writeBuffer = (void *) NULL; - statePtr->writeBufferSize = 0; - statePtr->nextPtr = tsdPtr->socketList; - tsdPtr->socketList = statePtr; - return statePtr; -} - -/* - *---------------------------------------------------------------------- - * - * FreeSocketInfo -- - * - * This function deallocates a SocketInfo structure that is no - * longer needed. - * - * Results: - * None. - * - * Side effects: - * Removes the socket from the global socket list, frees memory. - * - *---------------------------------------------------------------------- - */ - -static void -FreeSocketInfo( - TcpState *statePtr) /* The state pointer to free. */ -{ - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (statePtr == tsdPtr->socketList) { - tsdPtr->socketList = statePtr->nextPtr; - } else { - TcpState *p; - for (p = tsdPtr->socketList; p != NULL; p = p->nextPtr) { - if (p->nextPtr == statePtr) { - p->nextPtr = statePtr->nextPtr; - break; - } - } - } - - if (statePtr->writeBuffer != (void *) NULL) { - ckfree(statePtr->writeBuffer); - } - - ckfree((char *) statePtr); -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_MakeTcpClientChannel -- - * - * Creates a Tcl_Channel from an existing client TCP socket. - * - * Results: - * The Tcl_Channel wrapped around the preexisting TCP socket. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -Tcl_Channel -Tcl_MakeTcpClientChannel( - ClientData sock) /* The socket to wrap up into a channel. */ -{ - TcpState *statePtr; - char channelName[20]; - - if (TclpHasSockets(NULL) != TCL_OK) { - return NULL; - } - - statePtr = NewSocketInfo((StreamPtr) sock); - /* TODO: do we need to set the port??? */ - - sprintf(channelName, "sock%d", socketNumber++); - - statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE)); - Tcl_SetChannelBufferSize(statePtr->channel, socketBufferSize); - Tcl_SetChannelOption(NULL, statePtr->channel, "-translation", "auto crlf"); - return statePtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * CreateSocket -- - * - * This function opens a new socket and initializes the - * SocketInfo structure. - * - * Results: - * Returns a new SocketInfo, or NULL with an error in interp. - * - * Side effects: - * Adds a new socket to the socketList. - * - *---------------------------------------------------------------------- - */ - -static TcpState * -CreateSocket( - Tcl_Interp *interp, /* For error reporting; can be NULL. */ - int port, /* Port number to open. */ - CONST char *host, /* Name of host on which to open port. */ - CONST char *myaddr, /* Optional client-side address */ - int myport, /* Optional client-side port */ - int server, /* 1 if socket should be a server socket, - * else 0 for a client socket. */ - int async) /* 1 create async, 0 do sync. */ -{ - ip_addr macAddr; - OSErr err; - TCPiopb pb; - StreamPtr tcpStream; - TcpState *statePtr; - char * buffer; - - /* - * Figure out the ip address from the host string. - */ - - if (host == NULL) { - err = GetLocalAddress(&macAddr); - } else { - err = GetHostFromString(host, &macAddr); - } - if (err != noErr) { - Tcl_SetErrno(EHOSTUNREACH); - if (interp != (Tcl_Interp *) NULL) { - Tcl_AppendResult(interp, "couldn't open socket: ", - Tcl_PosixError(interp), (char *) NULL); - } - return (TcpState *) NULL; - } - - /* - * Create a MacTCP stream and create the state used for socket - * transactions from here on out. - */ - - ClearZombieSockets(); - buffer = ckalloc(socketBufferSize); - InitMacTCPParamBlock(&pb, TCPCreate); - pb.csParam.create.rcvBuff = buffer; - pb.csParam.create.rcvBuffLen = socketBufferSize; - pb.csParam.create.notifyProc = nil /* notifyUPP */; - err = PBControlSync((ParmBlkPtr) &pb); - if (err != noErr) { - Tcl_SetErrno(0); /* TODO: set to ENOSR - maybe?*/ - if (interp != (Tcl_Interp *) NULL) { - Tcl_AppendResult(interp, "couldn't open socket: ", - Tcl_PosixError(interp), (char *) NULL); - } - return (TcpState *) NULL; - } - - tcpStream = pb.tcpStream; - statePtr = NewSocketInfo(tcpStream); - statePtr->port = port; - - if (server) { - /* - * Set up server connection. - */ - - InitMacTCPParamBlock(&statePtr->pb, TCPPassiveOpen); - statePtr->pb.tcpStream = tcpStream; - statePtr->pb.csParam.open.localPort = statePtr->port; - statePtr->pb.ioCompletion = completeUPP; - statePtr->pb.csParam.open.userDataPtr = (Ptr) statePtr; - statePtr->pb.csParam.open.ulpTimeoutValue = 100; - statePtr->pb.csParam.open.ulpTimeoutAction = 1 /* 1:abort 0:report */; - statePtr->pb.csParam.open.commandTimeoutValue = 0 /* infinity */; - - statePtr->flags |= TCP_LISTENING; - err = PBControlAsync((ParmBlkPtr) &(statePtr->pb)); - - /* - * If this is a server on port 0 then we need to wait until - * the dynamic port allocation is made by the MacTcp driver. - */ - - if (statePtr->port == 0) { - EventRecord dummy; - - while (statePtr->pb.csParam.open.localPort == 0) { - WaitNextEvent(0, &dummy, 1, NULL); - if (statePtr->pb.ioResult != 0) { - break; - } - } - statePtr->port = statePtr->pb.csParam.open.localPort; - } - Tcl_SetErrno(EINPROGRESS); - } else { - /* - * Attempt to connect. The connect may fail at present with an - * EINPROGRESS but at a later time it will complete. The caller - * will set up a file handler on the socket if she is interested in - * being informed when the connect completes. - */ - - InitMacTCPParamBlock(&statePtr->pb, TCPActiveOpen); - - statePtr->pb.tcpStream = tcpStream; - statePtr->pb.csParam.open.remoteHost = macAddr; - statePtr->pb.csParam.open.remotePort = port; - statePtr->pb.csParam.open.localHost = 0; - statePtr->pb.csParam.open.localPort = myport; - statePtr->pb.csParam.open.userDataPtr = (Ptr) statePtr; - statePtr->pb.csParam.open.validityFlags = timeoutValue | timeoutAction; - statePtr->pb.csParam.open.ulpTimeoutValue = 60 /* seconds */; - statePtr->pb.csParam.open.ulpTimeoutAction = 1 /* 1:abort 0:report */; - statePtr->pb.csParam.open.commandTimeoutValue = 0; - - statePtr->pb.ioCompletion = completeUPP; - if (async) { - statePtr->flags |= TCP_ASYNC_CONNECT; - err = PBControlAsync((ParmBlkPtr) &(statePtr->pb)); - Tcl_SetErrno(EINPROGRESS); - } else { - err = PBControlSync((ParmBlkPtr) &(statePtr->pb)); - } - } - - switch (err) { - case noErr: - if (!async) { - statePtr->flags |= TCP_CONNECTED; - } - return statePtr; - case duplicateSocket: - Tcl_SetErrno(EADDRINUSE); - break; - case openFailed: - case connectionTerminated: - Tcl_SetErrno(ECONNREFUSED); - break; - case invalidStreamPtr: - case connectionExists: - default: - /* - * These cases should never occur. However, we will fail - * gracefully and hope Tcl can resume. The alternative is to panic - * which is probably a bit drastic. - */ - - Debugger(); - Tcl_SetErrno(err); - } - - /* - * We had error during the connection. Release the stream - * and file handle. Also report to the interp. - */ - - pb.ioCRefNum = driverRefNum; - pb.csCode = TCPRelease; - pb.tcpStream = tcpStream; - pb.ioCompletion = NULL; - err = PBControlSync((ParmBlkPtr) &pb); - - if (interp != (Tcl_Interp *) NULL) { - Tcl_AppendResult(interp, "couldn't open socket: ", - Tcl_PosixError(interp), (char *) NULL); - } - - ckfree(buffer); - FreeSocketInfo(statePtr); - return (TcpState *) NULL; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_OpenTcpClient -- - * - * Opens a TCP client socket and creates a channel around it. - * - * Results: - * The channel or NULL if failed. On failure, the routine also - * sets the output argument errorCodePtr to the error code. - * - * Side effects: - * Opens a client socket and creates a new channel. - * - *---------------------------------------------------------------------- - */ - -Tcl_Channel -Tcl_OpenTcpClient( - Tcl_Interp *interp, /* For error reporting; can be NULL. */ - int port, /* Port number to open. */ - CONST char *host, /* Host on which to open port. */ - CONST char *myaddr, /* Client-side address */ - int myport, /* Client-side port */ - int async) /* If nonzero, attempt to do an - * asynchronous connect. Otherwise - * we do a blocking connect. - * - currently ignored */ -{ - TcpState *statePtr; - char channelName[20]; - - if (TclpHasSockets(interp) != TCL_OK) { - return NULL; - } - - /* - * Create a new client socket and wrap it in a channel. - */ - - statePtr = CreateSocket(interp, port, host, myaddr, myport, 0, async); - if (statePtr == NULL) { - return NULL; - } - - sprintf(channelName, "sock%d", socketNumber++); - - statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE)); - Tcl_SetChannelBufferSize(statePtr->channel, socketBufferSize); - Tcl_SetChannelOption(NULL, statePtr->channel, "-translation", "auto crlf"); - return statePtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_OpenTcpServer -- - * - * Opens a TCP server socket and creates a channel around it. - * - * Results: - * The channel or NULL if failed. - * - * Side effects: - * Opens a server socket and creates a new channel. - * - *---------------------------------------------------------------------- - */ - -Tcl_Channel -Tcl_OpenTcpServer( - Tcl_Interp *interp, /* For error reporting - may be - * NULL. */ - int port, /* Port number to open. */ - CONST char *host, /* Name of local host. */ - Tcl_TcpAcceptProc *acceptProc, /* Callback for accepting connections - * from new clients. */ - ClientData acceptProcData) /* Data for the callback. */ -{ - TcpState *statePtr; - char channelName[20]; - - if (TclpHasSockets(interp) != TCL_OK) { - return NULL; - } - - /* - * Create a new client socket and wrap it in a channel. - */ - - statePtr = CreateSocket(interp, port, host, NULL, 0, 1, 1); - if (statePtr == NULL) { - return NULL; - } - - statePtr->acceptProc = acceptProc; - statePtr->acceptProcData = acceptProcData; - - sprintf(channelName, "sock%d", socketNumber++); - - statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) statePtr, 0); - Tcl_SetChannelBufferSize(statePtr->channel, socketBufferSize); - Tcl_SetChannelOption(NULL, statePtr->channel, "-translation", "auto crlf"); - return statePtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * SocketEventProc -- - * - * This procedure is called by Tcl_ServiceEvent when a socket event - * reaches the front of the event queue. This procedure is - * responsible for notifying the generic channel code. - * - * Results: - * Returns 1 if the event was handled, meaning it should be removed - * from the queue. Returns 0 if the event was not handled, meaning - * it should stay on the queue. The only time the event isn't - * handled is if the TCL_FILE_EVENTS flag bit isn't set. - * - * Side effects: - * Whatever the channel callback procedures do. - * - *---------------------------------------------------------------------- - */ - -static int -SocketEventProc( - Tcl_Event *evPtr, /* Event to service. */ - int flags) /* Flags that indicate what events to - * handle, such as TCL_FILE_EVENTS. */ -{ - TcpState *statePtr; - SocketEvent *eventPtr = (SocketEvent *) evPtr; - int mask = 0; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return 0; - } - - /* - * Find the specified socket on the socket list. - */ - - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if ((statePtr == eventPtr->statePtr) && - (statePtr->tcpStream == eventPtr->tcpStream)) { - break; - } - } - - /* - * Discard events that have gone stale. - */ - - if (!statePtr) { - return 1; - } - statePtr->flags &= ~(TCP_PENDING); - if (statePtr->flags & TCP_RELEASE) { - SocketFreeProc(statePtr); - return 1; - } - - - /* - * Handle connection requests directly. - */ - - if (statePtr->flags & TCP_LISTEN_CONNECT) { - if (statePtr->checkMask & TCL_READABLE) { - TcpAccept(statePtr); - } - return 1; - } - - /* - * Mask off unwanted events then notify the channel. - */ - - mask = statePtr->checkMask & statePtr->watchMask; - if (mask) { - Tcl_NotifyChannel(statePtr->channel, mask); - } - return 1; -} - -/* - *---------------------------------------------------------------------- - * - * WaitForSocketEvent -- - * - * Waits until one of the specified events occurs on a socket. - * - * Results: - * Returns 1 on success or 0 on failure, with an error code in - * errorCodePtr. - * - * Side effects: - * Processes socket events off the system queue. - * - *---------------------------------------------------------------------- - */ - -static int -WaitForSocketEvent( - TcpState *statePtr, /* Information about this socket. */ - int mask, /* Events to look for. */ - int *errorCodePtr) /* Where to store errors? */ -{ - OSErr err; - TCPiopb statusPB; - EventRecord dummy; - - /* - * Loop until we get the specified condition, unless the socket is - * asynchronous. - */ - - do { - statusPB.ioCRefNum = driverRefNum; - statusPB.tcpStream = statePtr->tcpStream; - statusPB.csCode = TCPStatus; - err = PBControlSync((ParmBlkPtr) &statusPB); - if (err != noErr) { - /* - * I am not sure why it is right to return 1 - indicating success - * for synchronous sockets when an attempt to get status on the - * driver yeilds an error. But it is CERTAINLY wrong for async - * sockect which have not yet connected. - */ - - if (statePtr->flags & TCP_ASYNC_CONNECT) { - *errorCodePtr = EWOULDBLOCK; - return 0; - } else { - statePtr->checkMask |= (TCL_READABLE | TCL_WRITABLE); - return 1; - } - } - statePtr->checkMask = 0; - - /* - * The "6" below is the "connection being established" flag. I couldn't - * find a define for this in MacTCP.h, but that's what the programmer's - * guide says. - */ - - if ((statusPB.csParam.status.connectionState != 0) - && (statusPB.csParam.status.connectionState != 4) - && (statusPB.csParam.status.connectionState != 6)) { - if (statusPB.csParam.status.amtUnreadData > 0) { - statePtr->checkMask |= TCL_READABLE; - } - if (!(statePtr->flags & TCP_WRITING) - && (statusPB.csParam.status.sendWindow - - statusPB.csParam.status.amtUnackedData) > 0) { - statePtr->flags &= ~(TCP_ASYNC_CONNECT); - statePtr->checkMask |= TCL_WRITABLE; - } - if (mask & statePtr->checkMask) { - return 1; - } - } else { - break; - } - - /* - * Call the system to let other applications run while we - * are waiting for this event to occur. - */ - - WaitNextEvent(0, &dummy, 1, NULL); - } while (!(statePtr->flags & TCP_ASYNC_SOCKET)); - *errorCodePtr = EWOULDBLOCK; - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * TcpAccept -- - * Accept a TCP socket connection. This is called by the event - * loop, and it in turns calls any registered callbacks for this - * channel. - * - * Results: - * None. - * - * Side effects: - * Evals the Tcl script associated with the server socket. - * - *---------------------------------------------------------------------- - */ - -static void -TcpAccept( - TcpState *statePtr) -{ - TcpState *newStatePtr; - StreamPtr tcpStream; - char remoteHostname[255]; - OSErr err; - ip_addr remoteAddress; - long remotePort; - char channelName[20]; - - statePtr->flags &= ~TCP_LISTEN_CONNECT; - statePtr->checkMask &= ~TCL_READABLE; - - /* - * Transfer sever stream to new connection. - */ - - tcpStream = statePtr->tcpStream; - newStatePtr = NewSocketInfo(tcpStream); - newStatePtr->tcpStream = tcpStream; - sprintf(channelName, "sock%d", socketNumber++); - - - newStatePtr->flags |= TCP_CONNECTED; - newStatePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) newStatePtr, (TCL_READABLE | TCL_WRITABLE)); - Tcl_SetChannelBufferSize(newStatePtr->channel, socketBufferSize); - Tcl_SetChannelOption(NULL, newStatePtr->channel, "-translation", - "auto crlf"); - - remoteAddress = statePtr->pb.csParam.open.remoteHost; - remotePort = statePtr->pb.csParam.open.remotePort; - - /* - * Reopen passive connect. Make new tcpStream the server. - */ - - ClearZombieSockets(); - InitMacTCPParamBlock(&statePtr->pb, TCPCreate); - statePtr->pb.csParam.create.rcvBuff = ckalloc(socketBufferSize); - statePtr->pb.csParam.create.rcvBuffLen = socketBufferSize; - err = PBControlSync((ParmBlkPtr) &statePtr->pb); - if (err != noErr) { - /* - * Hmmm... We can't reopen the server. We'll go ahead - * an continue - but we are kind of broken now... - */ - Debugger(); - statePtr->tcpStream = -1; - statePtr->flags |= TCP_SERVER_ZOMBIE; - } - - tcpStream = statePtr->tcpStream = statePtr->pb.tcpStream; - - InitMacTCPParamBlock(&statePtr->pb, TCPPassiveOpen); - statePtr->pb.tcpStream = tcpStream; - statePtr->pb.csParam.open.localHost = 0; - statePtr->pb.csParam.open.localPort = statePtr->port; - statePtr->pb.ioCompletion = completeUPP; - statePtr->pb.csParam.open.userDataPtr = (Ptr) statePtr; - statePtr->flags |= TCP_LISTENING; - err = PBControlAsync((ParmBlkPtr) &(statePtr->pb)); - /* - * TODO: deal with case where we can't recreate server socket... - */ - - /* - * Finally we run the accept procedure. We must do this last to make - * sure we are in a nice clean state. This Tcl code can do anything - * including closing the server or client sockets we've just delt with. - */ - - if (statePtr->acceptProc != NULL) { - sprintf(remoteHostname, "%d.%d.%d.%d", remoteAddress>>24, - remoteAddress>>16 & 0xff, remoteAddress>>8 & 0xff, - remoteAddress & 0xff); - - (statePtr->acceptProc)(statePtr->acceptProcData, newStatePtr->channel, - remoteHostname, remotePort); - } -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_GetHostName -- - * - * Returns the name of the local host. - * - * Results: - * A string containing the network name for this machine, or - * an empty string if we can't figure out the name. The caller - * must not modify or free this string. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -CONST char * -Tcl_GetHostName() -{ - static int hostnameInited = 0; - static char hostname[255]; - ip_addr ourAddress; - Tcl_DString dString; - OSErr err; - - if (hostnameInited) { - return hostname; - } - - if (TclpHasSockets(NULL) == TCL_OK) { - err = GetLocalAddress(&ourAddress); - if (err == noErr) { - /* - * Search for the doman name and return it if found. Otherwise, - * just print the IP number to a string and return that. - */ - - Tcl_DStringInit(&dString); - err = ResolveAddress(ourAddress, &dString); - if (err == noErr) { - strcpy(hostname, dString.string); - } else { - sprintf(hostname, "%d.%d.%d.%d", ourAddress>>24, ourAddress>>16 & 0xff, - ourAddress>>8 & 0xff, ourAddress & 0xff); - } - Tcl_DStringFree(&dString); - - hostnameInited = 1; - return hostname; - } - } - - hostname[0] = '\0'; - hostnameInited = 1; - return hostname; -} - -/* - *---------------------------------------------------------------------- - * - * ResolveAddress -- - * - * This function is used to resolve an ip address to it's full - * domain name address. - * - * Results: - * An os err value. - * - * Side effects: - * Treats client data as int we set to true. - * - *---------------------------------------------------------------------- - */ - -static OSErr -ResolveAddress( - ip_addr tcpAddress, /* Address to resolve. */ - Tcl_DString *dsPtr) /* Returned address in string. */ -{ - int i; - EventRecord dummy; - DNRState dnrState; - OSErr err; - - /* - * Call AddrToName to resolve our ip address to our domain name. - * The call is async, so we must wait for a callback to tell us - * when to continue. - */ - - for (i = 0; i < NUM_ALT_ADDRS; i++) { - dnrState.hostInfo.addr[i] = 0; - } - dnrState.done = 0; - GetCurrentProcess(&(dnrState.psn)); - err = AddrToName(tcpAddress, &dnrState.hostInfo, resultUPP, (Ptr) &dnrState); - if (err == cacheFault) { - while (!dnrState.done) { - WaitNextEvent(0, &dummy, 1, NULL); - } - } - - /* - * If there is no error in finding the domain name we set the - * result into the dynamic string. We also work around a bug in - * MacTcp where an extranious '.' may be found at the end of the name. - */ - - if (dnrState.hostInfo.rtnCode == noErr) { - i = strlen(dnrState.hostInfo.cname) - 1; - if (dnrState.hostInfo.cname[i] == '.') { - dnrState.hostInfo.cname[i] = '\0'; - } - Tcl_DStringAppend(dsPtr, dnrState.hostInfo.cname, -1); - } - - return dnrState.hostInfo.rtnCode; -} - -/* - *---------------------------------------------------------------------- - * - * DNRCompletionRoutine -- - * - * This function is called when the Domain Name Server is done - * seviceing our request. It just sets a flag that we can poll - * in functions like Tcl_GetHostName to let them know to continue. - * - * Results: - * None. - * - * Side effects: - * Treats client data as int we set to true. - * - *---------------------------------------------------------------------- - */ - -static pascal void -DNRCompletionRoutine( - struct hostInfo *hostinfoPtr, /* Host infor struct. */ - DNRState *dnrStatePtr) /* Completetion state. */ -{ - dnrStatePtr->done = true; - WakeUpProcess(&(dnrStatePtr->psn)); -} - -/* - *---------------------------------------------------------------------- - * - * CleanUpExitProc -- - * - * This procedure is invoked as an exit handler when ExitToShell - * is called. It aborts any lingering socket connections. This - * must be called or the Mac OS will more than likely crash. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static pascal void -CleanUpExitProc() -{ - TCPiopb exitPB; - TcpState *statePtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - while (tsdPtr->socketList != NULL) { - statePtr = tsdPtr->socketList; - tsdPtr->socketList = statePtr->nextPtr; - - /* - * Close and Release the connection. - */ - - exitPB.ioCRefNum = driverRefNum; - exitPB.csCode = TCPClose; - exitPB.tcpStream = statePtr->tcpStream; - exitPB.csParam.close.ulpTimeoutValue = 60 /* seconds */; - exitPB.csParam.close.ulpTimeoutAction = 1 /* 1:abort 0:report */; - exitPB.csParam.close.validityFlags = timeoutValue | timeoutAction; - exitPB.ioCompletion = NULL; - PBControlSync((ParmBlkPtr) &exitPB); - - exitPB.ioCRefNum = driverRefNum; - exitPB.csCode = TCPRelease; - exitPB.tcpStream = statePtr->tcpStream; - exitPB.ioCompletion = NULL; - PBControlSync((ParmBlkPtr) &exitPB); - } -} - -/* - *---------------------------------------------------------------------- - * - * GetHostFromString -- - * - * Looks up the passed in domain name in the domain resolver. It - * can accept strings of two types: 1) the ip number in string - * format, or 2) the domain name. - * - * Results: - * We return a ip address or 0 if there was an error or the - * domain does not exist. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static OSErr -GetHostFromString( - CONST char *name, /* Host in string form. */ - ip_addr *address) /* Returned IP address. */ -{ - OSErr err; - int i; - EventRecord dummy; - DNRState dnrState; - - if (TclpHasSockets(NULL) != TCL_OK) { - return 0; - } - - /* - * Call StrToAddr to get the ip number for the passed in domain - * name. The call is async, so we must wait for a callback to - * tell us when to continue. - */ - - for (i = 0; i < NUM_ALT_ADDRS; i++) { - dnrState.hostInfo.addr[i] = 0; - } - dnrState.done = 0; - GetCurrentProcess(&(dnrState.psn)); - err = StrToAddr((char*)name, &dnrState.hostInfo, resultUPP, (Ptr) &dnrState); - if (err == cacheFault) { - while (!dnrState.done) { - WaitNextEvent(0, &dummy, 1, NULL); - } - } - - /* - * For some reason MacTcp may return a cachFault a second time via - * the hostinfo block. This seems to be a bug in MacTcp. In this case - * we run StrToAddr again - which seems to then work just fine. - */ - - if (dnrState.hostInfo.rtnCode == cacheFault) { - dnrState.done = 0; - err = StrToAddr((char*)name, &dnrState.hostInfo, resultUPP, (Ptr) &dnrState); - if (err == cacheFault) { - while (!dnrState.done) { - WaitNextEvent(0, &dummy, 1, NULL); - } - } - } - - if (dnrState.hostInfo.rtnCode == noErr) { - *address = dnrState.hostInfo.addr[0]; - } - - return dnrState.hostInfo.rtnCode; -} - -/* - *---------------------------------------------------------------------- - * - * IOCompletionRoutine -- - * - * This function is called when an asynchronous socket operation - * completes. Since this routine runs as an interrupt handler, - * it will simply set state to tell the notifier that this socket - * is now ready for action. Note that this function is running at - * interupt time and can't allocate memory or do much else except - * set state. - * - * Results: - * None. - * - * Side effects: - * Sets some state in the socket state. May also wake the process - * if we are not currently running. - * - *---------------------------------------------------------------------- - */ - -static void -IOCompletionRoutine( - TCPiopb *pbPtr) /* Tcp parameter block. */ -{ - TcpState *statePtr; - - if (pbPtr->csCode == TCPSend) { - statePtr = (TcpState *) pbPtr->csParam.send.userDataPtr; - } else { - statePtr = (TcpState *) pbPtr->csParam.open.userDataPtr; - } - - /* - * Always wake the process in case it's in WaitNextEvent. - * If an error has a occured - just return. We will deal - * with the problem later. - */ - - WakeUpProcess(&statePtr->psn); - if (pbPtr->ioResult != noErr) { - return; - } - - if (statePtr->flags & TCP_ASYNC_CONNECT) { - statePtr->flags &= ~TCP_ASYNC_CONNECT; - statePtr->flags |= TCP_CONNECTED; - statePtr->checkMask |= TCL_READABLE & TCL_WRITABLE; - } else if (statePtr->flags & TCP_LISTENING) { - if (statePtr->port == 0) { - Debugger(); - } - statePtr->flags &= ~TCP_LISTENING; - statePtr->flags |= TCP_LISTEN_CONNECT; - statePtr->checkMask |= TCL_READABLE; - } else if (statePtr->flags & TCP_WRITING) { - statePtr->flags &= ~TCP_WRITING; - statePtr->checkMask |= TCL_WRITABLE; - if (!(statePtr->flags & TCP_CONNECTED)) { - InitMacTCPParamBlock(&statePtr->pb, TCPClose); - statePtr->pb.tcpStream = statePtr->tcpStream; - statePtr->pb.ioCompletion = closeUPP; - statePtr->pb.csParam.close.userDataPtr = (Ptr) statePtr; - if (PBControlAsync((ParmBlkPtr) &statePtr->pb) != noErr) { - statePtr->flags |= TCP_RELEASE; - } - } - } -} - -/* - *---------------------------------------------------------------------- - * - * GetLocalAddress -- - * - * Get the IP address for this machine. The result is cached so - * the result is returned quickly after the first call. - * - * Results: - * Macintosh error code. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static OSErr -GetLocalAddress( - unsigned long *addr) /* Returns host IP address. */ -{ - struct GetAddrParamBlock pBlock; - OSErr err = noErr; - static unsigned long localAddress = 0; - - if (localAddress == 0) { - memset(&pBlock, 0, sizeof(pBlock)); - pBlock.ioResult = 1; - pBlock.csCode = ipctlGetAddr; - pBlock.ioCRefNum = driverRefNum; - err = PBControlSync((ParmBlkPtr) &pBlock); - - if (err != noErr) { - return err; - } - localAddress = pBlock.ourAddress; - } - - *addr = localAddress; - return noErr; -} - -/* - *---------------------------------------------------------------------- - * - * GetBufferSize -- - * - * Get the appropiate buffer size for our machine & network. This - * value will be used by the rest of Tcl & the MacTcp driver for - * the size of its buffers. If out method for determining the - * optimal buffer size fails for any reason - we return a - * reasonable default. - * - * Results: - * Size of optimal buffer in bytes. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static long -GetBufferSize() -{ - UDPiopb iopb; - OSErr err = noErr; - long bufferSize; - - memset(&iopb, 0, sizeof(iopb)); - err = GetLocalAddress(&iopb.csParam.mtu.remoteHost); - if (err != noErr) { - return CHANNEL_BUF_SIZE; - } - iopb.ioCRefNum = driverRefNum; - iopb.csCode = UDPMaxMTUSize; - err = PBControlSync((ParmBlkPtr)&iopb); - if (err != noErr) { - return CHANNEL_BUF_SIZE; - } - bufferSize = (iopb.csParam.mtu.mtuSize * 4) + 1024; - if (bufferSize < CHANNEL_BUF_SIZE) { - bufferSize = CHANNEL_BUF_SIZE; - } - return bufferSize; -} - -/* - *---------------------------------------------------------------------- - * - * TclSockGetPort -- - * - * Maps from a string, which could be a service name, to a port. - * Used by socket creation code to get port numbers and resolve - * registered service names to port numbers. - * - * Results: - * A standard Tcl result. On success, the port number is - * returned in portPtr. On failure, an error message is left in - * the interp's result. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -int -TclSockGetPort( - Tcl_Interp *interp, /* Interp for error messages. */ - char *string, /* Integer or service name */ - char *proto, /* "tcp" or "udp", typically - - * ignored on Mac - assumed to be tcp */ - int *portPtr) /* Return port number */ -{ - PortInfo *portInfoPtr = NULL; - - if (Tcl_GetInt(interp, string, portPtr) == TCL_OK) { - if (*portPtr > 0xFFFF) { - Tcl_AppendResult(interp, "couldn't open socket: port number too high", - (char *) NULL); - return TCL_ERROR; - } - if (*portPtr < 0) { - Tcl_AppendResult(interp, "couldn't open socket: negative port number", - (char *) NULL); - return TCL_ERROR; - } - return TCL_OK; - } - for (portInfoPtr = portServices; portInfoPtr->name != NULL; portInfoPtr++) { - if (!strcmp(portInfoPtr->name, string)) { - break; - } - } - if (portInfoPtr != NULL && portInfoPtr->name != NULL) { - *portPtr = portInfoPtr->port; - Tcl_ResetResult(interp); - return TCL_OK; - } - - return TCL_ERROR; -} - -/* - *---------------------------------------------------------------------- - * - * ClearZombieSockets -- - * - * This procedure looks through the socket list and removes the - * first stream it finds that is ready for release. This procedure - * should be called before we ever try to create new Tcp streams - * to ensure we can least allocate one stream. - * - * Results: - * None. - * - * Side effects: - * Tcp streams may be released. - * - *---------------------------------------------------------------------- - */ - -static void -ClearZombieSockets() -{ - TcpState *statePtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if (statePtr->flags & TCP_RELEASE) { - SocketFreeProc(statePtr); - return; - } - } -} - - -/* - *---------------------------------------------------------------------- - * - * NotifyRoutine -- - * - * This routine does nothing currently, and is not being used. But - * it is useful if you want to experiment with what MacTCP thinks that - * it is doing... - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ -pascal void NotifyRoutine ( - StreamPtr tcpStream, - unsigned short eventCode, - Ptr userDataPtr, - unsigned short terminReason, - struct ICMPReport *icmpMsg) -{ - StreamPtr localTcpStream; - unsigned short localEventCode; - unsigned short localTerminReason; - struct ICMPReport localIcmpMsg; - - localTcpStream = tcpStream; - localEventCode = eventCode; - localTerminReason = terminReason; - localIcmpMsg = *icmpMsg; - -} |