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archie/tcl7.6/mac/tclMacSock.c
Mario Fetka b2af3b41bd Update tcl/tk for tcl-dp
2024-05-27 16:40:40 +02:00

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/*
* tclMacSock.c
*
* Channel drivers for Macintosh sockets.
*
* Copyright (c) 1996 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCS: @(#) tclMacSock.c 1.31 96/08/27 19:45:09
*/
#include "tclInt.h"
#include "tclPort.h"
#include "tclMacInt.h"
#include <AddressXlation.h>
#include <Aliases.h>
#include <Devices.h>
#include <Errors.h>
#include <Events.h>
#include <Files.h>
#include <Gestalt.h>
#include <MacTCP.h>
#include <Processes.h>
#include <Strings.h>
/*
* This is the size of the channel name for File based channels
*/
#define CHANNEL_NAME_SIZE 64
static char channelName[CHANNEL_NAME_SIZE+1];
/*
* 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 Tcl_WatchFile. */
Tcl_File sock; /* The file handle for the socket. */
Tcl_TcpAcceptProc *acceptProc; /* Proc to call on accept. */
ClientData acceptProcData; /* The data for the accept proc. */
rdsEntry rdsarray[5+1]; /* Array used when cleaning out recieve
* buffers on a closing socket. */
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_WATCH (1<<3) /* TclMacWatchSocket has been called
* since thelast time we entered
* Tcl_WaitForEvent. */
#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. */
/*
* Static routines for this file:
*/
static pascal void CleanUpExitProc _ANSI_ARGS_((void));
static void CloseCompletionRoutine _ANSI_ARGS_((TCPiopb *pb));
static TcpState * CreateSocket _ANSI_ARGS_((Tcl_Interp *interp,
int port, char *host, char *myAddr, int myPort,
int server, int async));
static pascal void DNRCompletionRoutine _ANSI_ARGS_((
struct hostInfo *hostinfoPtr,
DNRState *dnrStatePtr));
static long GetBufferSize _ANSI_ARGS_((void));
static OSErr GetHostFromString _ANSI_ARGS_((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 int InitSockets _ANSI_ARGS_((void));
static TcpState * NewSocketInfo _ANSI_ARGS_((Tcl_File file));
static OSErr ResolveAddress _ANSI_ARGS_((ip_addr tcpAddress,
Tcl_DString *dsPtr));
static void SocketFreeProc _ANSI_ARGS_((ClientData clientData));
static void TcpAccept _ANSI_ARGS_((ClientData data, int mask));
static int TcpBlockMode _ANSI_ARGS_((ClientData instanceData, int mode));
static int TcpClose _ANSI_ARGS_((ClientData instanceData,
Tcl_Interp *interp));
static Tcl_File TcpGetFile _ANSI_ARGS_((ClientData instanceData,
int direction));
static int TcpGetOptionProc _ANSI_ARGS_((ClientData instanceData,
char *optionName, Tcl_DString *dsPtr));
static int TcpInput _ANSI_ARGS_((ClientData instanceData,
char *buf, int toRead, int *errorCode));
static int TcpOutput _ANSI_ARGS_((ClientData instanceData,
char *buf, int toWrite, int *errorCode));
static int TcpReady _ANSI_ARGS_((ClientData instanceData,
int mask));
static void TcpWatch _ANSI_ARGS_((ClientData instanceData,
int mask));
/*
* This structure describes the channel type structure for TCP socket
* based IO:
*/
static Tcl_ChannelType tcpChannelType = {
"tcp", /* Type name. */
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. */
TcpReady, /* Are there events? */
TcpGetFile /* Get Tcl_Files out of channel. */
};
/*
* Universal Procedure Pointers (UPP) for various callback
* routines used by MacTcp code.
*/
ResultUPP resultUPP = NULL;
TCPIOCompletionUPP completeUPP = NULL;
TCPIOCompletionUPP closeUPP = 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},
};
/*
* Every open socket has an entry on the following list.
*/
static TcpState *socketList = NULL;
/*
* Globals for holding information about OS support for sockets.
*/
static int socketsTestInited = false;
static int hasSockets = false;
static int socketsInitalized = false;
static short driverRefNum = 0;
static int socketNumber = 0;
static int socketBufferSize = CHANNEL_BUF_SIZE;
static ProcessSerialNumber applicationPSN;
/*
*----------------------------------------------------------------------
*
* 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;
int errorCode = 0, done = false;
StreamPtr tcpStream;
OSErr err;
tcpStream = statePtr->tcpStream;
statePtr->flags &= ~TCP_CONNECTED;
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) {
statePtr->flags |= TCP_RELEASE;
return errorCode;
}
/*
* Delete a file handler that may be active for this socket.
* Channel handlers are already deleted in the generic IO close
* code which called this function.
*/
Tcl_DeleteFileHandler(statePtr->sock);
/*
* Free the file handle. As a side effect, this will call the
* SocketFreeProc to release the SocketInfo associated with this file.
*/
Tcl_FreeFile(statePtr->sock);
return errorCode;
}
/*
*----------------------------------------------------------------------
*
* 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;
statePtr = (TcpState *) pbPtr;
/*
* 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.
*/
if (statePtr->pb.csCode == TCPNoCopyRcv) {
InitMacTCPParamBlock(&statePtr->pb, TCPRcvBfrReturn);
statePtr->pb.ioCompletion = closeUPP;
statePtr->pb.csParam.receive.rdsPtr = (Ptr) statePtr->rdsarray;
err = PBControlAsync((ParmBlkPtr) &statePtr->pb);
} else {
InitMacTCPParamBlock(&statePtr->pb, TCPNoCopyRcv);
statePtr->pb.ioCompletion = closeUPP;
statePtr->pb.csParam.receive.commandTimeoutValue = 1;
statePtr->pb.csParam.receive.rdsPtr = (Ptr) statePtr->rdsarray;
statePtr->pb.csParam.receive.rdsLength = 5;
err = PBControlAsync((ParmBlkPtr) &statePtr->pb);
}
if (err != noErr) {
statePtr->flags |= TCP_RELEASE;
return;
}
}
/*
*----------------------------------------------------------------------
*
* 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 *errorCode) /* Where to store error code. */
{
TcpState *statePtr = (TcpState *) instanceData;
StreamPtr tcpStream;
OSErr err;
int timeOut, mask;
*errorCode = 0;
errno = 0;
tcpStream = statePtr->tcpStream;
if (bufSize == 0) {
return 0;
}
/*
* If an asynchronous connect is in progress, attempt to wait for it
* to complete before reading.
*/
if (statePtr->flags & TCP_ASYNC_CONNECT) {
if (statePtr->flags & TCP_ASYNC_SOCKET) {
timeOut = 0;
} else {
timeOut = -1;
}
mask = TclWaitForFile(statePtr->sock, TCL_WRITABLE, timeOut);
if (mask & TCL_WRITABLE) {
statePtr->flags &= (~(TCP_ASYNC_CONNECT));
} else if (timeOut == 0) {
*errorCode = errno = EWOULDBLOCK;
return -1;
}
}
statePtr->pb.ioCRefNum = driverRefNum;
statePtr->pb.tcpStream = tcpStream;
statePtr->pb.csCode = TCPStatus;
err = PBControlSync((ParmBlkPtr) &(statePtr->pb));
if (err != noErr) {
/* Debugger(); */
statePtr->flags |= TCP_REMOTE_CLOSED;
return 0; /* EOF */
}
if (statePtr->pb.csParam.status.amtUnreadData < bufSize) {
bufSize = statePtr->pb.csParam.status.amtUnreadData;
}
/* EWOULDBLOCK ??? */
if (bufSize == 0) {
SInt8 connectionState = statePtr->pb.csParam.status.connectionState;
if (connectionState == 14) {
statePtr->flags |= TCP_REMOTE_CLOSED;
return 0;
}
if (connectionState != 8) {
/* Debugger(); */
}
*errorCode = EWOULDBLOCK;
statePtr->checkMask &= ~TCL_READABLE;
return -1;
}
InitMacTCPParamBlock(&statePtr->pb, TCPRcv);
statePtr->pb.tcpStream = tcpStream;
statePtr->pb.csParam.receive.rcvBuff = buf;
statePtr->pb.csParam.receive.rcvBuffLen = bufSize;
err = PBControlSync((ParmBlkPtr) &(statePtr->pb));
switch (err) {
case noErr:
return statePtr->pb.csParam.receive.rcvBuffLen;
case connectionClosing:
*errorCode = errno = ESHUTDOWN;
statePtr->flags |= TCP_REMOTE_CLOSED;
return 0;
case connectionDoesntExist:
case connectionTerminated:
*errorCode = errno = ENOTCONN;
statePtr->flags |= TCP_REMOTE_CLOSED;
return 0;
case invalidStreamPtr:
default:
return -1;
}
}
/*
*----------------------------------------------------------------------
*
* TcpGetFile --
*
* Called from Tcl_GetChannelFile to retrieve Tcl_Files from inside
* a file based channel.
*
* Results:
* The appropriate Tcl_File or NULL if not present.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static Tcl_File
TcpGetFile(instanceData, direction)
ClientData instanceData; /* The file state. */
int direction; /* Which Tcl_File to retrieve? */
{
TcpState *statePtr = (TcpState *) instanceData;
if ((direction == TCL_READABLE) || (direction == TCL_WRITABLE)) {
return statePtr->sock;
}
return (Tcl_File) NULL;
}
/*
*----------------------------------------------------------------------
*
* 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. */
char *buf, /* The data buffer. */
int toWrite, /* How many bytes to write? */
int *errorCode) /* Where to store error code. */
{
TcpState *statePtr = (TcpState *) instanceData;
StreamPtr tcpStream;
OSErr err;
int amount;
wdsEntry dataSegment[2];
int timeOut, mask;
*errorCode = 0;
tcpStream = statePtr->tcpStream;
/*
* If an asynchronous connect is in progress, attempt to wait for it
* to complete before reading.
*/
if (statePtr->flags & TCP_ASYNC_CONNECT) {
if (statePtr->flags & TCP_ASYNC_SOCKET) {
timeOut = 0;
} else {
timeOut = -1;
}
mask = TclWaitForFile(statePtr->sock, TCL_WRITABLE, timeOut);
if (mask & TCL_WRITABLE) {
statePtr->flags &= (~(TCP_ASYNC_CONNECT));
} else if (timeOut == 0) {
*errorCode = EWOULDBLOCK;
Tcl_SetErrno(EWOULDBLOCK);
return -1;
}
}
statePtr->pb.ioCRefNum = driverRefNum;
statePtr->pb.tcpStream = tcpStream;
statePtr->pb.csCode = TCPStatus;
err = PBControlSync((ParmBlkPtr) &(statePtr->pb));
if (err != noErr) {
return -1;
}
amount = statePtr->pb.csParam.status.sendWindow -
statePtr->pb.csParam.status.amtUnackedData;
if (amount <= 0) {
statePtr->checkMask &= ~TCL_WRITABLE;
*errorCode = EWOULDBLOCK;
return -1;
} else if (toWrite < amount) {
amount = toWrite;
}
dataSegment[0].length = amount;
dataSegment[0].ptr = buf;
dataSegment[1].length = 0;
InitMacTCPParamBlock(&statePtr->pb, TCPSend);
statePtr->pb.tcpStream = tcpStream;
statePtr->pb.csParam.send.wdsPtr = (Ptr) dataSegment;
statePtr->pb.csParam.send.pushFlag = 1;
err = PBControlSync((ParmBlkPtr) &(statePtr->pb));
switch (err) {
case noErr:
return amount;
case connectionClosing:
*errorCode = errno = ESHUTDOWN;
statePtr->flags |= TCP_REMOTE_CLOSED;
return -1;
case connectionDoesntExist:
case connectionTerminated:
*errorCode = errno = ENOTCONN;
statePtr->flags |= TCP_REMOTE_CLOSED;
return -1;
case invalidStreamPtr:
default:
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. */
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, doAll = false;
ip_addr tcpAddress;
char buffer[128];
OSErr err;
Tcl_DString dString;
int timeOut, mask;
/*
* If an asynchronous connect is in progress, attempt to wait for it
* to complete before reading.
*/
if (statePtr->flags & TCP_ASYNC_CONNECT) {
if (statePtr->flags & TCP_ASYNC_SOCKET) {
timeOut = 0;
} else {
timeOut = -1;
}
mask = TclWaitForFile(statePtr->sock, TCL_WRITABLE, timeOut);
if (mask & TCL_WRITABLE) {
statePtr->flags &= (~(TCP_ASYNC_CONNECT));
} else if (timeOut == 0) {
Tcl_SetErrno(EWOULDBLOCK);
return -1;
}
}
/*
* Determine which options we need to do. Do all of them
* if optionName is NULL.
*/
if (optionName == (char *) NULL || optionName[0] == '\0') {
doAll = true;
} else {
if (!strcmp(optionName, "-peername")) {
doPeerName = true;
} else if (!strcmp(optionName, "-sockname")) {
doSockName = true;
} else {
Tcl_SetErrno(EINVAL);
return TCL_ERROR;
}
}
/*
* Get status on the stream.
*/
statePtr->pb.ioCRefNum = driverRefNum;
statePtr->pb.tcpStream = statePtr->tcpStream;
statePtr->pb.csCode = TCPStatus;
err = PBControlSync((ParmBlkPtr) &(statePtr->pb));
if (err != noErr) {
Debugger(); /* TODO */
return TCL_ERROR;
}
Tcl_DStringInit(&dString);
/*
* Get the sockname for the socket.
*/
if (doAll || doSockName) {
if (doAll) {
Tcl_DStringAppendElement(dsPtr, "-sockname");
Tcl_DStringStartSublist(dsPtr);
}
tcpAddress = statePtr->pb.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", statePtr->pb.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 = statePtr->pb.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", statePtr->pb.csParam.status.remotePort);
Tcl_DStringAppendElement(dsPtr, buffer);
if (doAll) {
Tcl_DStringEndSublist(dsPtr);
}
}
Tcl_DStringFree(&dString);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TcpReady --
*
* Called by the notifier to check whether events of interest are
* present on the channel.
*
* Results:
* Returns OR-ed combination of TCL_READABLE, TCL_WRITABLE and
* TCL_EXCEPTION to indicate which events of interest are present.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
TcpReady(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;
return (statePtr->checkMask & mask);
}
/*
*----------------------------------------------------------------------
*
* TcpWatch --
*
* Initialize the notifier to watch Tcl_Files from 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;
}
/*
*----------------------------------------------------------------------
*
* SocketFreeProc --
*
* This callback is invoked by Tcl_FreeFile 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;
if (!(statePtr->flags & TCP_RELEASE)) {
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(); /* should panic */
}
/*
* Free the buffer space used by the socket.
*/
ckfree((char *) statePtr->pb.csParam.create.rcvBuff);
/*
* Remove the socket from socketList.
*/
if (statePtr == socketList) {
socketList = statePtr->nextPtr;
} else {
TcpState *p;
for (p = socketList; p != NULL; p = p->nextPtr) {
if (p->nextPtr == statePtr) {
p->nextPtr = statePtr->nextPtr;
break;
}
}
}
ckfree((char *) statePtr);
}
/*
*----------------------------------------------------------------------
*
* 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.
*
*----------------------------------------------------------------------
*/
static TcpState *
NewSocketInfo(
Tcl_File file) /* Channel file. */
{
TcpState *statePtr;
statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
statePtr->tcpStream = (StreamPtr) Tcl_GetFileInfo(file, NULL);
statePtr->psn = applicationPSN;
statePtr->sock = file;
statePtr->flags = 0;
statePtr->checkMask = 0;
statePtr->watchMask = 0;
statePtr->acceptProc = (Tcl_TcpAcceptProc *) NULL;
statePtr->acceptProcData = (ClientData) NULL;
statePtr->nextPtr = socketList;
socketList = statePtr;
Tcl_SetNotifierData(file, SocketFreeProc, (ClientData) statePtr);
return 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;
Tcl_File sockFile;
char channelName[20];
Tcl_Channel chan;
if (!socketsInitalized) {
if (InitSockets() == 0) {
return NULL;
}
}
sockFile = Tcl_GetFile(sock, TCL_MAC_SOCKET);
statePtr = NewSocketInfo(sockFile);
/* TODO: do we need to set the port??? */
sprintf(channelName, "sock%d", socketNumber);
chan = Tcl_CreateChannel(&tcpChannelType, channelName,
(ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE));
if (chan != (Tcl_Channel) NULL) {
Tcl_SetChannelBufferSize(chan, socketBufferSize);
Tcl_SetChannelOption(NULL, chan, "-translation", "auto crlf");
}
return chan;
}
/*
*----------------------------------------------------------------------
*
* 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. */
char *host, /* Name of host on which to open port. */
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;
Tcl_File handle;
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(0);
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.
*/
buffer = ckalloc(socketBufferSize);
InitMacTCPParamBlock(&pb, TCPCreate);
pb.csParam.create.rcvBuff = buffer;
pb.csParam.create.rcvBuffLen = socketBufferSize;
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;
handle = Tcl_GetFile((ClientData) tcpStream, TCL_MAC_SOCKET);
statePtr = NewSocketInfo(handle);
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->flags |= TCP_LISTENING;
err = PBControlAsync((ParmBlkPtr) &(statePtr->pb));
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.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:
Tcl_SetErrno(ECONNREFUSED);
break;
default:
/* 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);
}
Tcl_FreeFile(handle);
ckfree(buffer);
ckfree((char *) 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. */
char *host, /* Host on which to open port. */
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 */
{
Tcl_Channel chan;
TcpState *statePtr;
char channelName[20];
if (TclHasSockets(interp) != TCL_OK) {
return NULL;
}
if (!socketsInitalized) {
if (InitSockets() == 0) {
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++);
chan = Tcl_CreateChannel(&tcpChannelType, channelName,
(ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE));
Tcl_SetChannelOption(NULL, chan, "-translation", "auto crlf");
Tcl_SetChannelBufferSize(chan, socketBufferSize);
return chan;
}
/*
*----------------------------------------------------------------------
*
* 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. */
char *host, /* Name of local host. */
Tcl_TcpAcceptProc *acceptProc, /* Callback for accepting connections
* from new clients. */
ClientData acceptProcData) /* Data for the callback. */
{
Tcl_Channel chan;
TcpState *statePtr;
char channelName[20];
if (TclHasSockets(interp) != TCL_OK) {
return NULL;
}
if (!socketsInitalized) {
if (InitSockets() == 0) {
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;
/*
* Set up the callback mechanism for accepting connections
* from new clients. The caller will use Tcl_TcpRegisterCallback
* to register a callback to call when a new connection is
* accepted.
*/
Tcl_CreateFileHandler(statePtr->sock, TCL_READABLE, TcpAccept,
(ClientData) statePtr);
sprintf(channelName, "sock%d", socketNumber++);
chan = Tcl_CreateChannel(&tcpChannelType, channelName,
(ClientData) statePtr, 0);
Tcl_SetChannelOption(NULL, chan, "-translation", "auto crlf");
Tcl_SetChannelBufferSize(chan, socketBufferSize);
return chan;
}
/*
*----------------------------------------------------------------------
*
* TclMacWatchSocket --
*
* This function imlements the socket specific portion of the
* Tcl_WatchFile function in the notifier.
*
* Results:
* None.
*
* Side effects:
* The watched socket will be placed into non-blocking mode, and
* an entry on the asynch handler list will be created if necessary.
*
*----------------------------------------------------------------------
*/
void
TclMacWatchSocket(
Tcl_File file, /* Socket to watch. */
int mask) /* OR'ed combination of TCL_READABLE,
* TCL_WRITABLE, and TCL_EXCEPTION:
* indicates conditions to wait for
* in select. */
{
TcpState *statePtr = (TcpState *) Tcl_GetNotifierData(file, NULL);
/*
* Create socket info on demand if necessary. We should only enter this
* code if the socket was created outside of Tcl. Since this may be
* the first time that the socket code has been called, we need to invoke
* TclHasSockets to ensure that everything is initialized properly.
*
* Note: This may not work as certain state may be incorrect.
*/
if (statePtr == NULL) {
if (TclHasSockets(NULL) != TCL_OK) {
return;
}
if (!socketsInitalized) {
InitSockets();
}
statePtr = NewSocketInfo(file);
}
statePtr->watchMask = mask;
}
/*
*----------------------------------------------------------------------
*
* TclMacNotifySocket --
*
* Look through the currently opened socket channels. For each
* channel we get the Tcp streams current status. Based on the
* status we determine if the channel should be made readable or
* writeable. The channel is also made read/write-able if there
* is an error while getting the status.
*
* Results:
* None.
*
* Side effects:
* May set a channel to be readable or writeable.
*
*----------------------------------------------------------------------
*/
int
TclMacNotifySocket()
{
TcpState *statePtr;
TcpState *deadPtr = NULL;
TCPiopb statusPB;
int numFound = 0;
int foundSomething;
int amount;
int didStatus;
OSErr err;
if (socketList == NULL) {
return 0;
}
/*
* Establish or remove any notifiers.
*/
for (statePtr = socketList; statePtr != NULL;
statePtr = statePtr->nextPtr) {
/*
* Check to see if this socket is dead and needs to be
* cleaned up.
*/
if (statePtr->flags & TCP_RELEASE) {
deadPtr = statePtr;
continue;
}
foundSomething = false;
didStatus = false;
if (statePtr->watchMask & TCL_READABLE) {
if (statePtr->checkMask & TCL_READABLE) {
foundSomething = true;
} else if (statePtr->flags & TCP_CONNECTED) {
statusPB.ioCRefNum = driverRefNum;
statusPB.tcpStream = statePtr->tcpStream;
statusPB.csCode = TCPStatus;
err = PBControlSync((ParmBlkPtr) &statusPB);
didStatus = true;
/*
* If there is an error or there is more data available
* we make the channel readable.
*/
if ((err != noErr) ||
(statusPB.csParam.status.amtUnreadData > 0)) {
statePtr->checkMask |= TCL_READABLE;
foundSomething = true;
}
}
}
if (statePtr->watchMask & TCL_WRITABLE) {
if (statePtr->checkMask & TCL_WRITABLE) {
foundSomething = true;
} 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 = true;
}
}
}
if (foundSomething) {
numFound++;
}
}
/*
* If we need to clean - do it now.
*/
if (deadPtr != NULL) {
SocketFreeProc(deadPtr);
}
return numFound;
}
/*
*----------------------------------------------------------------------
*
* TclMacSocketReady --
*
* This function is invoked by Tcl_FileReady to check whether
* the specified conditions are present on a socket.
*
* Results:
* The return value is 0 if none of the conditions specified by
* mask were true for socket the last time the system checked.
* If any of the conditions were true, then the return value is a
* mask of those that were true.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclMacSocketReady(
Tcl_File file, /* File handle for a stream. */
int mask) /* OR'ed combination of TCL_READABLE,
* TCL_WRITABLE, and TCL_EXCEPTION:
* indicates conditions caller cares about. */
{
TcpState *statePtr = (TcpState *) Tcl_GetNotifierData(file, NULL);
return (statePtr->checkMask & mask);
}
/*
*----------------------------------------------------------------------
*
* 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(
ClientData data, /* Callback token. */
int mask) /* Not used. */
{
TcpState *statePtr;
TcpState *newStatePtr;
Tcl_File handle;
StreamPtr tcpStream;
Tcl_Channel chan;
char remoteHostname[255];
OSErr err;
statePtr = (TcpState *) data;
Tcl_DeleteFileHandler(statePtr->sock);
statePtr->flags &= ~TCP_LISTEN_CONNECT;
statePtr->checkMask &= ~TCL_READABLE;
/*
* Transfer sever stream to new connection.
*/
tcpStream = statePtr->tcpStream;
handle = Tcl_GetFile((ClientData) tcpStream, TCL_MAC_SOCKET);
newStatePtr = NewSocketInfo(handle);
newStatePtr->tcpStream = tcpStream;
sprintf(channelName, "sock%d", socketNumber++);
chan = Tcl_CreateChannel(&tcpChannelType, channelName,
(ClientData) newStatePtr, (TCL_READABLE | TCL_WRITABLE));
newStatePtr->flags |= TCP_CONNECTED;
Tcl_SetChannelOption(NULL, chan, "-translation", "auto crlf");
Tcl_SetChannelBufferSize(chan, socketBufferSize);
/*
* Reopen passive connect. Make new tcpStream the server.
*/
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...
*/
}
tcpStream = statePtr->tcpStream = statePtr->pb.tcpStream;
statePtr->sock = Tcl_GetFile((ClientData) tcpStream, TCL_MAC_SOCKET);
Tcl_SetNotifierData(statePtr->sock, SocketFreeProc, (ClientData) statePtr);
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...
*/
/*
* Remove old file handler & create new one.
*/
Tcl_CreateFileHandler(statePtr->sock, TCL_READABLE, TcpAccept,
(ClientData) statePtr);
/*
* 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) {
ip_addr ourAddress = statePtr->pb.csParam.open.remoteHost;
sprintf(remoteHostname, "%d.%d.%d.%d", ourAddress>>24,
ourAddress>>16 & 0xff, ourAddress>>8 & 0xff,
ourAddress & 0xff);
(statePtr->acceptProc)(statePtr->acceptProcData, chan,
remoteHostname, statePtr->pb.csParam.open.remotePort);
}
}
/*
*----------------------------------------------------------------------
*
* Tcl_GetHostName --
*
* Returns the name of the local host. The result is cached to
* be speedy after the first call.
*
* Results:
* Returns a string containing the host name, or NULL on error.
* The returned string must be freed by the caller.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
char *
Tcl_GetHostName()
{
static int hostnameInited = 0;
static char hostname[255];
ip_addr ourAddress;
Tcl_DString dString;
OSErr err;
if (hostnameInited) {
return hostname;
}
if (TclHasSockets(NULL) != TCL_OK) {
hostname[0] = '\0';
hostnameInited = 1;
return hostname;
}
if (!socketsInitalized) {
if (InitSockets() == 0) {
return NULL;
}
}
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;
}
return (char *) NULL;
}
/*
*----------------------------------------------------------------------
*
* 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));
}
/*
*----------------------------------------------------------------------
*
* TclHasSockets --
*
* 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. This call uses the Macintosh
* gestalt function to determine the existance of Mac Tcp.
*
* Results:
* Returns TCL_OK if the system supports sockets, or TCL_ERROR with
* an error in interp.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
#define gestaltMacTCPVersion 'mtcp'
int
TclHasSockets(
Tcl_Interp *interp) /* Interp for error messages. */
{
long response;
static int socketsTestInited = false;
static int hasSockets = false;
if (!socketsTestInited) {
if (Gestalt(gestaltMacTCPVersion, &response) == noErr) {
hasSockets = true;
} else {
hasSockets = false;
}
socketsTestInited = true;
}
if (hasSockets) {
return TCL_OK;
}
if (interp != NULL) {
Tcl_AppendResult(interp, "sockets are not available on this system",
NULL);
}
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* 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:
* None.
*
*----------------------------------------------------------------------
*/
static int
InitSockets()
{
ParamBlockRec pb;
OSErr err;
if (socketsInitalized) {
return 1;
}
/*
* 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) {
return 0;
}
driverRefNum = pb.ioParam.ioRefNum;
socketBufferSize = GetBufferSize();
err = OpenResolver(NULL);
if (err != noErr) {
return 0;
}
GetCurrentProcess(&applicationPSN);
/*
* Create UPP's for various callback routines.
*/
resultUPP = NewResultProc(DNRCompletionRoutine);
completeUPP = NewTCPIOCompletionProc(IOCompletionRoutine);
closeUPP = NewTCPIOCompletionProc(CloseCompletionRoutine);
/*
* 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);
socketsInitalized = true;
return 1;
}
/*
*----------------------------------------------------------------------
*
* 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()
{
TcpState *statePtr;
while (socketList != NULL) {
statePtr = socketList;
socketList = statePtr->nextPtr;
/*
* Close and Release the connection.
*/
statePtr->pb.ioCRefNum = driverRefNum;
statePtr->pb.csCode = TCPClose;
statePtr->pb.tcpStream = statePtr->tcpStream;
statePtr->pb.csParam.close.ulpTimeoutValue = 60 /* seconds */;
statePtr->pb.csParam.close.ulpTimeoutAction = 1 /* 1:abort 0:report */;
statePtr->pb.csParam.close.validityFlags = timeoutValue | timeoutAction;
statePtr->pb.ioCompletion = NULL;
PBControlSync((ParmBlkPtr) &(statePtr->pb));
statePtr->pb.ioCRefNum = driverRefNum;
statePtr->pb.csCode = TCPRelease;
statePtr->pb.tcpStream = statePtr->tcpStream;
statePtr->pb.ioCompletion = NULL;
PBControlSync((ParmBlkPtr) &(statePtr->pb));
}
}
/*
*----------------------------------------------------------------------
*
* 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(
char *name, /* Host in string form. */
ip_addr *address) /* Returned IP address. */
{
OSErr err;
int i;
EventRecord dummy;
DNRState dnrState;
if (TclHasSockets(NULL) != TCL_OK) {
return 0;
}
if (!socketsInitalized) {
if (InitSockets() == 0) {
return -1;
}
}
/*
* 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(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(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 a client or server socket gets a
* connection from a remote host. It will then 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;
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) {
statePtr->flags &= ~TCP_LISTENING;
statePtr->flags |= TCP_LISTEN_CONNECT;
statePtr->checkMask |= TCL_READABLE;
}
}
/*
*----------------------------------------------------------------------
*
* 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
* interp->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;
}
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