/*
* 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.
*
* RCS: @(#) $Id: tclMacSock.c,v 1.14.2.1 2006/03/10 14:27:41 vasiljevic Exp $
*/
#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.
*/
#ifndef TCL_DEBUG
#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;
}
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