/* $XConsortium: xfindproxy.c /main/9 1996/12/02 10:10:34 swick $ */

/*
Copyright (c) 1996  X Consortium

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from the X Consortium.
*/


#include <stdio.h>
#include <X11/Xos.h>
#include <X11/Xfuncs.h>
#include <X11/Xmd.h>
#include <X11/StringDefs.h>
#include <X11/Intrinsic.h>
#include <X11/ICE/ICElib.h>
#include <X11/ICE/ICEmsg.h>
#include <X11/ICE/ICEproto.h>
#include <X11/PM/PM.h>
#include <X11/PM/PMproto.h>
#include "xfindproxy.h"

#ifndef X_NOT_STDC_ENV
#include <stdlib.h>
#else
extern char *getenv();
#endif


void PMprocessMessages ();

int PMopcode;

int PMversionCount = 1;
IcePoVersionRec	PMversions[] =
                {{PM_MAJOR_VERSION, PM_MINOR_VERSION, PMprocessMessages}};

XtAppContext	appContext;

typedef struct {
    int		status;
    char	*addr;
    char	*error;
} GetProxyAddrReply;


static int cvthexkey (hexstr, ptrp)	/* turn hex key string into octets */
    char *hexstr;
    char **ptrp;
{
    int i;
    int len = 0;
    char *retval, *s;
    unsigned char *us;
    char c;
    char savec = '\0';

    /* count */
    for (s = hexstr; *s; s++) {
	if (!isascii(*s)) return -1;
	if (isspace(*s)) continue;
	if (!isxdigit(*s)) return -1;
	len++;
    }

    /* if odd then there was an error */
    if ((len & 1) == 1) return -1;


    /* now we know that the input is good */
    len >>= 1;
    retval = (char *) malloc (len);
    if (!retval)
	return -1;

    for (us = (unsigned char *) retval, i = len; i > 0; hexstr++) {
	c = *hexstr;
	if (isspace(c)) continue;	 /* already know it is ascii */
	if (isupper(c))
	    c = tolower(c);
	if (savec) {
#define atoh(c) ((c) - (((c) >= '0' && (c) <= '9') ? '0' : ('a'-10)))
	    *us = (unsigned char)((atoh(savec) << 4) + atoh(c));
#undef atoh
	    savec = 0;		/* ready for next character */
	    us++;
	    i--;
	} else {
	    savec = c;
	}
    }
    *ptrp = retval;
    return len;
}


main (argc, argv)

int  argc;
char **argv;

{
    IceConn			iceConn;
    IceProtocolSetupStatus	setupstat;
    char			*vendor = NULL;
    char			*release = NULL;
    pmGetProxyAddrMsg		*pMsg;
    char 			*pData;
    int				len, i;
    IceReplyWaitInfo		replyWait;
    GetProxyAddrReply		reply;
    int				majorVersion, minorVersion;
    Bool			gotReply, ioErrorOccured;
    char			errorString[255];
    char			*serviceName = NULL, *serverAddress = NULL;
    char			*hostAddress = NULL, *startOptions = NULL;
    char			*managerAddress = NULL;
    Bool			haveAuth = 0;
    char			authName[40];
    char			authData[128];
    char			*authDataBinary = NULL;
    int				authLen = 0;

    for (i = 1; i < argc; i++)
    {
	if (argv[i][0] == '-')
	{
	    switch (argv[i][1])
	    {
	    case 'a':					/* -auth */
		haveAuth = 1;
		continue;

	    case 'm':					/* -manager */
		if (++i >= argc) goto usage;
		managerAddress = (char *) XtNewString (argv[i]);
		continue;

	    case 's':					/* -server */
		if (++i >= argc) goto usage;
		serverAddress = (char *) XtNewString (argv[i]);
		continue;

	    case 'n':					/* -name */
		if (++i >= argc) goto usage;
		serviceName = XtNewString (argv[i]);
		continue;

	    case 'h':					/* -host */
		if (++i >= argc) goto usage;
		hostAddress = XtNewString (argv[i]);
		continue;

	    case 'o':					/* -options */
		if (++i >= argc) goto usage;
		startOptions = XtNewString (argv[i]);
		continue;
	    }
	}

    usage:
	fprintf (stderr,
	 "usage: xfindproxy -server serverAddr -name serviceName [-manager managerAddr] [-auth] [-host hostAddr] [-options opts]\n-manager can be omitted only if PROXY_MANAGER is in the environment\n");
	exit (1);
    }

    if (serviceName == NULL || serverAddress == NULL)
	goto usage;

    if (managerAddress == NULL) {
	managerAddress = getenv("PROXY_MANAGER");
	if (managerAddress == NULL) {
	    fprintf (stderr, "Error: -manager option must be specified when PROXY_MANAGER is not in the environment\n");
	    exit (1);
	}
    }

    /*
     * Register support for PROXY_MANAGEMENT.
     */

    if ((PMopcode = IceRegisterForProtocolSetup (
	PM_PROTOCOL_NAME,
	"XC", "1.0",
	PMversionCount, PMversions,
	0, /* authcount */
	NULL, /* authnames */ 
        NULL, /* authprocs */
	NULL  /* IceIOErrorProc */ )) < 0)
    {
	fprintf (stderr,
	    "Could not register PROXY_MANAGEMENT protocol with ICE");
	exit (1);
    }


    appContext = XtCreateApplicationContext ();

    InitWatchProcs (appContext);

    if ((iceConn = IceOpenConnection (
	managerAddress, NULL, 0, 0, 256, errorString)) == NULL)
    {
	fprintf (stderr,
	    "Could not open ICE connection to proxy manager: %s", errorString);
	exit (1);
    }

    setupstat = IceProtocolSetup (iceConn, PMopcode, NULL,
	False /* mustAuthenticate */,
	&majorVersion, &minorVersion,
	&vendor, &release, 256, errorString);

    if (setupstat != IceProtocolSetupSuccess)
    {
	IceCloseConnection (iceConn);
	fprintf (stderr,
	    "Could not initialize proxy management protocol: %s\n",
	    errorString);
	exit (1);
    }


    /*
     * If auth data is supplied, read it from stdin.
     */

    if (haveAuth)
    {
	fgets (authName, sizeof (authName), stdin);
	fgets (authData, sizeof (authData), stdin);

	for (i = 0; i < strlen (authName); i++)
	    if (authName[i] == '\n')
	    {
		authName[i] = '\0';
		break;
	    }
	for (i = 0; i < strlen (authData); i++)
	    if (authData[i] == '\n')
	    {
		authData[i] = '\0';
		break;
	    }

	/*
	 * Convert the hex auth data to binary.
	 */

	authLen = cvthexkey (authData, &authDataBinary);

	if (authLen == -1)
	{
	    fprintf (stderr, "Could not convert hex auth data to binary\n");
	    exit (1);
	}
    }


    /*
     * Now send the GetProxyAddr request.
     */

    len = STRING_BYTES (serviceName) +
	  STRING_BYTES (serverAddress) +
	  STRING_BYTES (hostAddress) +
	  STRING_BYTES (startOptions) +
	  (authLen > 0 ? (STRING_BYTES (authName) + authLen) : 0);

    IceGetHeaderExtra (iceConn, PMopcode, PM_GetProxyAddr,
	SIZEOF (pmGetProxyAddrMsg), WORD64COUNT (len),
	pmGetProxyAddrMsg, pMsg, pData);

    pMsg->authLen = authLen;

    STORE_STRING (pData, serviceName);
    STORE_STRING (pData, serverAddress);
    STORE_STRING (pData, hostAddress);
    STORE_STRING (pData, startOptions);
    if (authLen > 0)
    {
	STORE_STRING (pData, authName);
	memcpy (pData, authDataBinary, authLen);
    }

    IceFlush (iceConn);

    replyWait.sequence_of_request = IceLastSentSequenceNumber (iceConn);
    replyWait.major_opcode_of_request = PMopcode;
    replyWait.minor_opcode_of_request = PM_GetProxyAddr;
    replyWait.reply = (IcePointer) &reply;

    gotReply = False;
    ioErrorOccured = False;

    while (!gotReply && !ioErrorOccured)
    {
	ioErrorOccured = (IceProcessMessages (
	    iceConn, &replyWait, &gotReply) == IceProcessMessagesIOError);

	if (ioErrorOccured)
	{
	    fprintf (stderr, "IO error occured\n");
	    exit (1);
	}
	else if (gotReply)
	{
	    if (reply.status == PM_Success)
	    {
		fprintf (stdout, "%s\n", reply.addr);
	    }
	    else
	    {
		fprintf (stderr, "Error from proxy manager: %s\n",
		    reply.error);
	    }
	}
    }
}



void
PMprocessMessages (iceConn, clientData, opcode,
    length, swap, replyWait, replyReadyRet)

IceConn		 iceConn;
IcePointer       clientData;
int		 opcode;
unsigned long	 length;
Bool		 swap;
IceReplyWaitInfo *replyWait;
Bool		 *replyReadyRet;

{
    if (replyWait)
	*replyReadyRet = False;

    switch (opcode)
    {
    case PM_GetProxyAddrReply:

	if (!replyWait ||
	    replyWait->minor_opcode_of_request != PM_GetProxyAddr)
	{
	    _IceReadSkip (iceConn, length << 3);

	    _IceErrorBadState (iceConn, PMopcode,
		PM_GetProxyAddrReply, IceFatalToProtocol);
	}
        else
	{
	    pmGetProxyAddrReplyMsg 	*pMsg;
	    char			*pData, *pStart;
	    GetProxyAddrReply 	*reply = 
		(GetProxyAddrReply *) (replyWait->reply);

	    CHECK_AT_LEAST_SIZE (iceConn, PMopcode, opcode,
		length, SIZEOF (pmGetProxyAddrReplyMsg), IceFatalToProtocol);

	    IceReadCompleteMessage (iceConn, SIZEOF (pmGetProxyAddrReplyMsg),
		pmGetProxyAddrReplyMsg, pMsg, pStart);

	    if (!IceValidIO (iceConn))
	    {
		IceDisposeCompleteMessage (iceConn, pStart);
		return;
	    }

	    pData = pStart;

	    SKIP_STRING (pData, swap);		/* proxy-address */
	    SKIP_STRING (pData, swap);		/* failure-reason */

	    CHECK_COMPLETE_SIZE (iceConn, PMopcode, opcode,
		length, pData - pStart + SIZEOF (pmGetProxyAddrReplyMsg),
		pStart, IceFatalToProtocol);

	    pData = pStart;

	    EXTRACT_STRING (pData, swap, reply->addr);
	    EXTRACT_STRING (pData, swap, reply->error);

	    reply->status = pMsg->status;
	    *replyReadyRet = True;

	    IceDisposeCompleteMessage (iceConn, pStart);
	}
	break;

    default:
    {
	_IceErrorBadMinor (iceConn, PMopcode, opcode, IceCanContinue);
	_IceReadSkip (iceConn, length << 3);
	break;
    }
    }
}


void
_XtProcessIceMsgProc (client_data, source, id)

XtPointer	client_data;
int 		*source;
XtInputId	*id;

{
    IceConn			ice_conn = (IceConn) client_data;
    IceProcessMessagesStatus	status;

    status = IceProcessMessages (ice_conn, NULL, NULL);

    if (status == IceProcessMessagesIOError)
    {
	printf ("IO error occured\n");
	exit (1);
    }
}


void
_XtIceWatchProc (ice_conn, client_data, opening, watch_data)

IceConn 	ice_conn;
IcePointer	client_data;
Bool		opening;
IcePointer	*watch_data;

{
    if (opening)
    {
	XtAppContext appContext = (XtAppContext) client_data;
	void _XtProcessIceMsgProc ();

	*watch_data = (IcePointer) XtAppAddInput (
	    appContext,
	    IceConnectionNumber (ice_conn),
            (XtPointer) XtInputReadMask,
	    _XtProcessIceMsgProc,
	    (XtPointer) ice_conn);
    }
    else
    {
	XtRemoveInput ((XtInputId) *watch_data);
    }
}


Status
InitWatchProcs (appContext)

XtAppContext appContext;

{
    return (IceAddConnectionWatch (_XtIceWatchProc, (IcePointer) appContext));
}