globals.c   [plain text]


/*
 * "$Id: globals.c,v 1.7.2.2 2006/02/08 22:04:46 jlovell Exp $"
 *
 *   Global variable access routines for the Common UNIX Printing System (CUPS).
 *
 * Contents:
 *
 *   globals_init()       - One-time initializer of globals
 *   globals_destructor() - Frees memory allocated in _cups_globals().
 *   _cups_globals()	  - Return a pointer to thread local storage
 *   cdsa_init()          - One-time initializer of CDSA SSL.
 */

/*
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Software without specific prior written permission from Apple.  Except
as expressly stated in this notice, no other rights or licenses, express
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*/


/*
 * Include necessary headers...
 */

#include <stdlib.h>
#include "globals.h"
#include "http-private.h"

#ifdef HAVE_DLFCN_H
#  include <dlfcn.h>
#endif /* HAVE_DLFCN_H */


/*
 * Globals...
 */
#ifdef HAVE_CDSASSL
OSStatus (*_cupsSSLCloseProc)(SSLContextRef context) = NULL;
OSStatus (*_cupsSSLDisposeContextProc)(SSLContextRef context) = NULL;
OSStatus (*_cupsSSLGetBufferedReadSizeProc)(SSLContextRef context, size_t *bufSize) = NULL;
OSStatus (*_cupsSSLHandshakeProc)(SSLContextRef context) = NULL;
OSStatus (*_cupsSSLNewContextProc)(Boolean isServer, SSLContextRef *contextPtr) = NULL;
OSStatus (*_cupsSSLReadProc)(SSLContextRef context, void *data, size_t dataLength, size_t *processed) = NULL;
OSStatus (*_cupsSSLSetConnectionProc)(SSLContextRef context, SSLConnectionRef connection) = NULL;
OSStatus (*_cupsSSLSetEnableCertVerifyProc)(SSLContextRef context, Boolean enableVerify) = NULL;
OSStatus (*_cupsSSLSetIOFuncsProc)(SSLContextRef context, SSLReadFunc read, SSLWriteFunc write) = NULL;
OSStatus (*_cupsSSLWriteProc)(SSLContextRef context, const void *data, size_t dataLength, size_t *processed) = NULL;

OSStatus (*_cupsSecKeychainOpenProc)(const char *pathName, SecKeychainRef *keychain) = NULL;
OSStatus (*_cupsSecIdentitySearchCreateProc)(CFTypeRef keychainOrArray, CSSM_KEYUSE keyUsage, SecIdentitySearchRef *searchRef) = NULL;
OSStatus (*_cupsSecIdentitySearchCopyNextProc)(SecIdentitySearchRef searchRef, SecIdentityRef *identity) = NULL;

static pthread_once_t	cdsa_key_once = PTHREAD_ONCE_INIT;
					/* One-time initialization object */
#endif /* HAVE_CDSASSL */

static pthread_key_t	globals_key = -1;/* Thread local storage key */
static pthread_once_t	globals_key_once = PTHREAD_ONCE_INIT;
					/* One-time initialization object */

/*
 * Local functions...
 */

static void	globals_init();
static void	globals_destructor(void *value);
#ifdef HAVE_CDSASSL
static void	cdsa_init();
#endif /* HAVE_CDSASSL */


/*
 * 'globals_init()' - One-time initializer of globals.
 */

static
void globals_init()
{
    pthread_key_create(&globals_key, globals_destructor);
}


/*
 * 'globals_destructor()' - Frees memory allocated in _cups_globals().
 */

static
void globals_destructor(void *value)
{
  if (((cups_globals_t *)value)->http)
    httpClose(((cups_globals_t *)value)->http);

  _cupsLangFlush((cups_globals_t *)value);

  free(value);
}


/*
 * '_cups_globals()' - Return a pointer to thread local storage
 */

cups_globals_t *_cups_globals(void)
{
  cups_globals_t *globals;

  pthread_once(&globals_key_once, globals_init);

  if ((globals = (cups_globals_t *) pthread_getspecific(globals_key)) == NULL)
  {
    globals = calloc(1, sizeof(cups_globals_t));
    pthread_setspecific(globals_key, globals);

   /*
    * Initialize variables that have non-zero values
    */

    globals->cups_encryption = (http_encryption_t)-1;
    globals->cups_pwdcb = cups_get_password;

#ifdef HAVE_DOMAINSOCKETS
    strlcpy(globals->cups_server_domainsocket, CUPS_DEFAULT_DOMAINSOCKET, sizeof(globals->cups_server_domainsocket));
#endif /* HAVE_DOMAINSOCKETS */
  }

  return globals;
}


#if defined(HAVE_CDSASSL)
/*
 * 'cdsa_init()' - One-time initializer of CDSA SSL.
 */

static const char SecurityLibPath[]	    = "/System/Library/Frameworks/Security.framework/Security";

static
void cdsa_init()
{
#ifdef HAVE_DLFCN_H
 /*
  * If we have dlopen then weak-link the library and load it when needed.
  */

  void *cdsa_lib = NULL;

  cdsa_lib = dlopen(SecurityLibPath, RTLD_LAZY);

  _cupsSSLGetBufferedReadSizeProc	= dlsym(cdsa_lib, "SSLGetBufferedReadSize");
  _cupsSSLNewContextProc			= dlsym(cdsa_lib, "SSLNewContext");
  _cupsSSLSetIOFuncsProc			= dlsym(cdsa_lib, "SSLSetIOFuncs");
  _cupsSSLSetConnectionProc		= dlsym(cdsa_lib, "SSLSetConnection");
  _cupsSSLSetEnableCertVerifyProc	= dlsym(cdsa_lib, "SSLSetEnableCertVerify");
  _cupsSSLHandshakeProc			= dlsym(cdsa_lib, "SSLHandshake");
  _cupsSSLDisposeContextProc		= dlsym(cdsa_lib, "SSLDisposeContext");
  _cupsSSLCloseProc			= dlsym(cdsa_lib, "SSLClose");
  _cupsSSLReadProc			= dlsym(cdsa_lib, "SSLRead");
  _cupsSSLWriteProc			= dlsym(cdsa_lib, "SSLWrite");

  _cupsSecKeychainOpenProc		= dlsym(cdsa_lib, "SecKeychainOpen");
  _cupsSecIdentitySearchCreateProc	= dlsym(cdsa_lib, "SecIdentitySearchCreate");
  _cupsSecIdentitySearchCopyNextProc	= dlsym(cdsa_lib, "SecIdentitySearchCopyNext");
#else
  _cupsSSLGetBufferedReadSizeProc	= SSLGetBufferedReadSize;
  _cupsSSLNewContextProc			= SSLNewContext;
  _cupsSSLSetIOFuncsProc			= SSLSetIOFuncs;
  _cupsSSLSetConnectionProc		= SSLSetConnection;
  _cupsSSLSetEnableCertVerifyProc	= SSLSetEnableCertVerify;
  _cupsSSLHandshakeProc			= SSLHandshake;
  _cupsSSLDisposeContextProc		= SSLDisposeContext;
  _cupsSSLCloseProc			= SSLClose;
  _cupsSSLReadProc			= SSLRead;
  _cupsSSLWriteProc			= SSLWrite;

  _cupsSecKeychainOpenProc		= SecKeychainOpen;
  _cupsSecIdentitySearchCreateProc	= SecIdentitySearchCreate;
  _cupsSecIdentitySearchCopyNextProc	= SecIdentitySearchCopyNext;
#endif /* HAVE_DLFCN_H */
}


/*
 * '_cups_cdsa_init()' - Initialize cdsa ssl.
 */

void _cups_cdsa_init(void)
{
  pthread_once(&cdsa_key_once, cdsa_init);

  return;
}

#endif	/* HAVE_CDSASSL */

/*
 * End of "$Id: globals.c,v 1.7.2.2 2006/02/08 22:04:46 jlovell Exp $".
 */