[thirdparty/cups.git] / scheduler / listen.c

/*
 * "$Id: listen.c 7918 2008-09-08 22:03:01Z mike $"
 *
 *   Server listening routines for the Common UNIX Printing System (CUPS)
 *   scheduler.
 *
 *   Copyright 2007-2009 by Apple Inc.
 *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Apple Inc. and are protected by Federal copyright
 *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 *   which should have been included with this file.  If this file is
 *   file is missing or damaged, see the license at "http://www.cups.org/".
 *
 * Contents:
 *
 *   cupsdDeleteAllListeners() - Delete all listeners.
 *   cupsdPauseListening()     - Clear input polling on all listening sockets...
 *   cupsdResumeListening()    - Set input polling on all listening sockets...
 *   cupsdStartListening()     - Create all listening sockets...
 *   cupsdStopListening()      - Close all listening sockets...
 */

/*
 * Include necessary headers...
 */

#include "cupsd.h"


/*
 * Make sure the IPV6_V6ONLY is defined on Linux - older versions of
 * glibc don't define it even if the kernel supports it...
 */

#if defined(__linux) && !defined(IPV6_V6ONLY)
#  define IPV6_V6ONLY 26
#endif /* __linux && !IPV6_V6ONLY */


/*
 * 'cupsdDeleteAllListeners()' - Delete all listeners.
 */

void
cupsdDeleteAllListeners(void)
{
  cupsd_listener_t	*lis;		/* Current listening socket */


  for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
       lis;
       lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
    free(lis);

  cupsArrayDelete(Listeners);
  Listeners = NULL;
}


/*
 * 'cupsdPauseListening()' - Clear input polling on all listening sockets...
 */

void
cupsdPauseListening(void)
{
  cupsd_listener_t	*lis;		/* Current listening socket */


  if (cupsArrayCount(Listeners) < 1)
    return;

  if (cupsArrayCount(Clients) == MaxClients)
    cupsdLogMessage(CUPSD_LOG_WARN,
                    "Max clients reached, holding new connections...");
  else if (errno == ENFILE || errno == EMFILE)
    cupsdLogMessage(CUPSD_LOG_WARN,
                    "Too many open files, holding new connections for "
		    "30 seconds...");

  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdPauseListening: Clearing input bits...");

  for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
       lis;
       lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
    cupsdRemoveSelect(lis->fd);

  ListeningPaused = time(NULL) + 30;
}


/*
 * 'cupsdResumeListening()' - Set input polling on all listening sockets...
 */

void
cupsdResumeListening(void)
{
  cupsd_listener_t	*lis;		/* Current listening socket */


  if (cupsArrayCount(Listeners) < 1)
    return;

  cupsdLogMessage(CUPSD_LOG_INFO, "Resuming new connection processing...");
  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdResumeListening: Setting input bits...");

  for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
       lis;
       lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
    cupsdAddSelect(lis->fd, (cupsd_selfunc_t)cupsdAcceptClient, NULL, lis);

  ListeningPaused = 0;
}


/*
 * 'cupsdStartListening()' - Create all listening sockets...
 */

void
cupsdStartListening(void)
{
  int			status;		/* Bind result */
  int			p,		/* Port number */
			val;		/* Parameter value */
  cupsd_listener_t	*lis;		/* Current listening socket */
  char			s[256];		/* String addresss */
  const char		*have_domain;	/* Have a domain socket? */
  static const char * const encryptions[] =
		{			/* Encryption values */
		  "IfRequested",
		  "Never",
		  "Required",
		  "Always"
		};


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartListening: %d Listeners",
                  cupsArrayCount(Listeners));

 /*
  * Setup socket listeners...
  */

  for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners), LocalPort = 0,
           have_domain = NULL;
       lis;
       lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
  {
    httpAddrString(&(lis->address), s, sizeof(s));

#ifdef AF_INET6
    if (lis->address.addr.sa_family == AF_INET6)
      p = ntohs(lis->address.ipv6.sin6_port);
    else
#endif /* AF_INET6 */
#ifdef AF_LOCAL
    if (lis->address.addr.sa_family == AF_LOCAL)
      p = 0;
    else
#endif /* AF_LOCAL */
    p = ntohs(lis->address.ipv4.sin_port);

   /*
    * If needed, create a socket for listening...
    */

    if (lis->fd == -1)
    {
     /*
      * Create a socket for listening...
      */

      lis->fd = socket(lis->address.addr.sa_family, SOCK_STREAM, 0);

      if (lis->fd == -1)
      {
	cupsdLogMessage(CUPSD_LOG_ERROR,
			"Unable to open listen socket for address %s:%d - %s.",
			s, p, strerror(errno));

#ifdef AF_INET6
       /*
        * IPv6 is often disabled while DNS returns IPv6 addresses...
	*/

	if (lis->address.addr.sa_family != AF_INET6 &&
	    (FatalErrors & CUPSD_FATAL_LISTEN))
	  cupsdEndProcess(getpid(), 0);
#else
	if (FatalErrors & CUPSD_FATAL_LISTEN)
	  cupsdEndProcess(getpid(), 0);
#endif /* AF_INET6 */

	continue;
      }

     /*
      * Set things up to reuse the local address for this port.
      */

      val = 1;
#ifdef __sun
      setsockopt(lis->fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
#else
      setsockopt(lis->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
#endif /* __sun */

     /*
      * Bind to the port we found...
      */

#ifdef AF_INET6
      if (lis->address.addr.sa_family == AF_INET6)
      {
#  ifdef IPV6_V6ONLY
       /*
	* Accept only IPv6 connections on this socket, to avoid
	* potential security issues and to make all platforms behave
	* the same.
	*/

	val = 1;
#    ifdef __sun
	setsockopt(lis->fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&val, sizeof(val));
#    else
	setsockopt(lis->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
#    endif /* __sun */
#  endif /* IPV6_V6ONLY */

	status = bind(lis->fd, (struct sockaddr *)&(lis->address),
		      httpAddrLength(&(lis->address)));
      }
      else
#endif /* AF_INET6 */
#ifdef AF_LOCAL
      if (lis->address.addr.sa_family == AF_LOCAL)
      {
	mode_t	mask;			/* Umask setting */


       /*
	* Remove any existing domain socket file...
	*/

	unlink(lis->address.un.sun_path);

       /*
	* Save the current umask and set it to 0 so that all users can access
	* the domain socket...
	*/

	mask = umask(0);

       /*
	* Bind the domain socket...
	*/

	status = bind(lis->fd, (struct sockaddr *)&(lis->address),
		      httpAddrLength(&(lis->address)));

       /*
	* Restore the umask...
	*/

	umask(mask);
      }
      else
#endif /* AF_LOCAL */
      status = bind(lis->fd, (struct sockaddr *)&(lis->address),
		    sizeof(lis->address.ipv4));

      if (status < 0)
      {
	cupsdLogMessage(CUPSD_LOG_ERROR,
			"Unable to bind socket for address %s:%d - %s.",
			s, p, strerror(errno));
	close(lis->fd);
	lis->fd = -1;

	if (FatalErrors & CUPSD_FATAL_LISTEN)
	  cupsdEndProcess(getpid(), 0);

	continue;
      }

     /*
      * Listen for new clients.
      */

      if (listen(lis->fd, ListenBackLog) < 0)
      {
	cupsdLogMessage(CUPSD_LOG_ERROR,
			"Unable to listen for clients on address %s:%d - %s.",
			s, p, strerror(errno));

	close(lis->fd);
	lis->fd = -1;

	if (FatalErrors & CUPSD_FATAL_LISTEN)
	  cupsdEndProcess(getpid(), 0);

        continue;
      }
    }

    fcntl(lis->fd, F_SETFD, fcntl(lis->fd, F_GETFD) | FD_CLOEXEC);

    if (p)
      cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s:%d on fd %d...",
        	      s, p, lis->fd);
    else
    {
      cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s on fd %d...",
        	      s, lis->fd);

      if (chmod(s, 0140777))
	cupsdLogMessage(CUPSD_LOG_ERROR,
			"Unable to change permisssions on domain socket "
			"\"%s\" - %s", s, strerror(errno));
    }

   /*
    * Save the first port that is bound to the local loopback or
    * "any" address...
    */

    if ((!LocalPort || LocalEncryption == HTTP_ENCRYPT_ALWAYS) && p > 0 &&
        (httpAddrLocalhost(&(lis->address)) ||
         httpAddrAny(&(lis->address))))
    {
      LocalPort       = p;
      LocalEncryption = lis->encryption;
    }

#ifdef AF_LOCAL
    if (lis->address.addr.sa_family == AF_LOCAL && !have_domain)
      have_domain = lis->address.un.sun_path;
#endif /* AF_LOCAL */
  }

 /*
  * Make sure that we are listening on localhost!
  */

  if (!LocalPort && !have_domain)
  {
    cupsdLogMessage(CUPSD_LOG_EMERG,
                    "No Listen or Port lines were found to allow access via "
		    "localhost!");

    if (FatalErrors & (CUPSD_FATAL_CONFIG | CUPSD_FATAL_LISTEN))
      cupsdEndProcess(getpid(), 0);
  }

 /*
  * Set the CUPS_SERVER, IPP_PORT, and CUPS_ENCRYPTION variables based on
  * the listeners...
  */

  if (have_domain)
  {
   /*
    * Use domain sockets for the local connection...
    */

    cupsdSetEnv("CUPS_SERVER", have_domain);

    LocalEncryption = HTTP_ENCRYPT_IF_REQUESTED;
  }
  else
  {
   /*
    * Use the default local loopback address for the server...
    */

    cupsdSetEnv("CUPS_SERVER", "localhost");
  }

  cupsdSetEnv("CUPS_ENCRYPTION", encryptions[LocalEncryption]);

  if (LocalPort)
    cupsdSetEnvf("IPP_PORT", "%d", LocalPort);

 /*
  * Resume listening for connections...
  */

  cupsdResumeListening();
}


/*
 * 'cupsdStopListening()' - Close all listening sockets...
 */

void
cupsdStopListening(void)
{
  cupsd_listener_t	*lis;		/* Current listening socket */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdStopListening: closing all listen sockets.");

  cupsdPauseListening();

  for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
       lis;
       lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
  {
    if (lis->fd != -1)
    {
#ifdef WIN32
      closesocket(lis->fd);
#else
      close(lis->fd);
#endif /* WIN32 */

#ifdef AF_LOCAL
     /*
      * Remove domain sockets...
      */

#  ifdef HAVE_LAUNCH_H
      if (lis->address.addr.sa_family == AF_LOCAL && !Launchd)
#  else
      if (lis->address.addr.sa_family == AF_LOCAL)
#  endif /* HAVE_LAUNCH_H */
	unlink(lis->address.un.sun_path);
#endif /* AF_LOCAL */
    }
  }
}


/*
 * End of "$Id: listen.c 7918 2008-09-08 22:03:01Z mike $".
 */
Commit	Line	Data
ef416fc2	1	/*
b19ccc9e	2	* "$Id: listen.c 7918 2008-09-08 22:03:01Z mike $"
ef416fc2	3	*
	4	* Server listening routines for the Common UNIX Printing System (CUPS)
	5	* scheduler.
	6	*
d1c13e16	7	* Copyright 2007-2009 by Apple Inc.
4400e98d	8	* Copyright 1997-2006 by Easy Software Products, all rights reserved.
ef416fc2	9	*
ef416fc2	10	* These coded instructions, statements, and computer programs are the
bc44d920	11	* property of Apple Inc. and are protected by Federal copyright
	12	* law. Distribution and use rights are outlined in the file "LICENSE.txt"
	13	* which should have been included with this file. If this file is
	14	* file is missing or damaged, see the license at "http://www.cups.org/".
ef416fc2	15	*
	16	* Contents:
	17	*
bd7854cb	18	* cupsdDeleteAllListeners() - Delete all listeners.
	19	* cupsdPauseListening() - Clear input polling on all listening sockets...
	20	* cupsdResumeListening() - Set input polling on all listening sockets...
	21	* cupsdStartListening() - Create all listening sockets...
	22	* cupsdStopListening() - Close all listening sockets...
ef416fc2	23	*/
	24
	25	/*
	26	* Include necessary headers...
	27	*/
	28
	29	#include "cupsd.h"
	30
	31
	32	/*
	33	* Make sure the IPV6_V6ONLY is defined on Linux - older versions of
	34	* glibc don't define it even if the kernel supports it...
	35	*/
	36
	37	#if defined(__linux) && !defined(IPV6_V6ONLY)
	38	# define IPV6_V6ONLY 26
	39	#endif /* __linux && !IPV6_V6ONLY */
	40
	41
bd7854cb	42	/*
	43	* 'cupsdDeleteAllListeners()' - Delete all listeners.
	44	*/
	45
	46	void
	47	cupsdDeleteAllListeners(void)
	48	{
	49	cupsd_listener_t lis; / Current listening socket */
	50
	51
	52	for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
	53	lis;
	54	lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
	55	free(lis);
	56
	57	cupsArrayDelete(Listeners);
	58	Listeners = NULL;
	59	}
	60
	61
ef416fc2	62	/*
	63	* 'cupsdPauseListening()' - Clear input polling on all listening sockets...
	64	*/
	65
	66	void
	67	cupsdPauseListening(void)
	68	{
ef416fc2	69	cupsd_listener_t lis; / Current listening socket */
	70
	71
bd7854cb	72	if (cupsArrayCount(Listeners) < 1)
ef416fc2	73	return;
ef416fc2	74
bd7854cb	75	if (cupsArrayCount(Clients) == MaxClients)
ef416fc2	76	cupsdLogMessage(CUPSD_LOG_WARN,
ef416fc2	77	"Max clients reached, holding new connections...");
76cd9e37 MS	78	else if (errno == ENFILE \|\| errno == EMFILE)
	79	cupsdLogMessage(CUPSD_LOG_WARN,
	80	"Too many open files, holding new connections for "
	81	"30 seconds...");
ef416fc2	82
bd7854cb	83	cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdPauseListening: Clearing input bits...");
ef416fc2	84
bd7854cb	85	for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
	86	lis;
	87	lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
f7deaa1a	88	cupsdRemoveSelect(lis->fd);
76cd9e37 MS	89
76cd9e37 MS	90	ListeningPaused = time(NULL) + 30;
ef416fc2	91	}
	92
	93
	94	/*
	95	* 'cupsdResumeListening()' - Set input polling on all listening sockets...
	96	*/
	97
	98	void
	99	cupsdResumeListening(void)
	100	{
ef416fc2	101	cupsd_listener_t lis; / Current listening socket */
	102
	103
bd7854cb	104	if (cupsArrayCount(Listeners) < 1)
ef416fc2	105	return;
ef416fc2	106
76cd9e37	107	cupsdLogMessage(CUPSD_LOG_INFO, "Resuming new connection processing...");
bd7854cb	108	cupsdLogMessage(CUPSD_LOG_DEBUG2,
bd7854cb	109	"cupsdResumeListening: Setting input bits...");
ef416fc2	110
bd7854cb	111	for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
	112	lis;
	113	lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
f7deaa1a	114	cupsdAddSelect(lis->fd, (cupsd_selfunc_t)cupsdAcceptClient, NULL, lis);
76cd9e37 MS	115
76cd9e37 MS	116	ListeningPaused = 0;
ef416fc2	117	}
	118
	119
	120	/*
	121	* 'cupsdStartListening()' - Create all listening sockets...
	122	*/
	123
	124	void
	125	cupsdStartListening(void)
	126	{
	127	int status; /* Bind result */
bd7854cb	128	int p, /* Port number */
ef416fc2	129	val; /* Parameter value */
	130	cupsd_listener_t lis; / Current listening socket */
	131	char s[256]; /* String addresss */
	132	const char have_domain; / Have a domain socket? */
	133	static const char * const encryptions[] =
	134	{ /* Encryption values */
	135	"IfRequested",
	136	"Never",
	137	"Required",
	138	"Always"
	139	};
	140
	141
bd7854cb	142	cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartListening: %d Listeners",
bd7854cb	143	cupsArrayCount(Listeners));
ef416fc2	144
ef416fc2	145	/*
	146	* Setup socket listeners...
	147	*/
	148
bd7854cb	149	for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners), LocalPort = 0,
	150	have_domain = NULL;
	151	lis;
	152	lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
ef416fc2	153	{
	154	httpAddrString(&(lis->address), s, sizeof(s));
	155
	156	#ifdef AF_INET6
	157	if (lis->address.addr.sa_family == AF_INET6)
	158	p = ntohs(lis->address.ipv6.sin6_port);
	159	else
	160	#endif /* AF_INET6 */
	161	#ifdef AF_LOCAL
	162	if (lis->address.addr.sa_family == AF_LOCAL)
	163	p = 0;
	164	else
	165	#endif /* AF_LOCAL */
	166	p = ntohs(lis->address.ipv4.sin_port);
	167
	168	/*
a4d04587	169	* If needed, create a socket for listening...
ef416fc2	170	*/
ef416fc2	171
ef416fc2	172	if (lis->fd == -1)
ef416fc2	173	{
ef416fc2	174	/*
a4d04587	175	* Create a socket for listening...
ef416fc2	176	*/
bd7854cb	177
a4d04587	178	lis->fd = socket(lis->address.addr.sa_family, SOCK_STREAM, 0);
bd7854cb	179
a4d04587	180	if (lis->fd == -1)
	181	{
	182	cupsdLogMessage(CUPSD_LOG_ERROR,
bd7854cb	183	"Unable to open listen socket for address %s:%d - %s.",
a4d04587	184	s, p, strerror(errno));
49d87452 MS	185
	186	#ifdef AF_INET6
	187	/*
	188	* IPv6 is often disabled while DNS returns IPv6 addresses...
	189	*/
	190
	191	if (lis->address.addr.sa_family != AF_INET6 &&
	192	(FatalErrors & CUPSD_FATAL_LISTEN))
	193	cupsdEndProcess(getpid(), 0);
	194	#else
	195	if (FatalErrors & CUPSD_FATAL_LISTEN)
	196	cupsdEndProcess(getpid(), 0);
	197	#endif /* AF_INET6 */
	198
a4d04587	199	continue;
a4d04587	200	}
bd7854cb	201
ef416fc2	202	/*
a4d04587	203	* Set things up to reuse the local address for this port.
ef416fc2	204	*/
bd7854cb	205
a4d04587	206	val = 1;
e00b005a	207	#ifdef __sun
a4d04587	208	setsockopt(lis->fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
e00b005a	209	#else
a4d04587	210	setsockopt(lis->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
e00b005a	211	#endif /* __sun */
bd7854cb	212
ef416fc2	213	/*
a4d04587	214	* Bind to the port we found...
ef416fc2	215	*/
bd7854cb	216
e00b005a	217	#ifdef AF_INET6
a4d04587	218	if (lis->address.addr.sa_family == AF_INET6)
a4d04587	219	{
e00b005a	220	# ifdef IPV6_V6ONLY
a4d04587	221	/*
	222	* Accept only IPv6 connections on this socket, to avoid
	223	* potential security issues and to make all platforms behave
	224	* the same.
	225	*/
bd7854cb	226
a4d04587	227	val = 1;
e00b005a	228	# ifdef __sun
a4d04587	229	setsockopt(lis->fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&val, sizeof(val));
e00b005a	230	# else
a4d04587	231	setsockopt(lis->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
e00b005a	232	# endif /* __sun */
e00b005a	233	# endif /* IPV6_V6ONLY */
bd7854cb	234
a4d04587	235	status = bind(lis->fd, (struct sockaddr *)&(lis->address),
	236	httpAddrLength(&(lis->address)));
	237	}
	238	else
e00b005a	239	#endif /* AF_INET6 */
e00b005a	240	#ifdef AF_LOCAL
a4d04587	241	if (lis->address.addr.sa_family == AF_LOCAL)
	242	{
	243	mode_t mask; /* Umask setting */
bd7854cb	244
bd7854cb	245
a4d04587	246	/*
	247	* Remove any existing domain socket file...
	248	*/
bd7854cb	249
a4d04587	250	unlink(lis->address.un.sun_path);
bd7854cb	251
a4d04587	252	/*
f8b3a85b MS	253	* Save the current umask and set it to 0 so that all users can access
f8b3a85b MS	254	* the domain socket...
a4d04587	255	*/
bd7854cb	256
a4d04587	257	mask = umask(0);
bd7854cb	258
a4d04587	259	/*
	260	* Bind the domain socket...
	261	*/
bd7854cb	262
a4d04587	263	status = bind(lis->fd, (struct sockaddr *)&(lis->address),
a4d04587	264	httpAddrLength(&(lis->address)));
bd7854cb	265
a4d04587	266	/*
	267	* Restore the umask...
	268	*/
bd7854cb	269
a4d04587	270	umask(mask);
	271	}
	272	else
e00b005a	273	#endif /* AF_LOCAL */
ef416fc2	274	status = bind(lis->fd, (struct sockaddr *)&(lis->address),
a4d04587	275	sizeof(lis->address.ipv4));
bd7854cb	276
a4d04587	277	if (status < 0)
	278	{
	279	cupsdLogMessage(CUPSD_LOG_ERROR,
bd7854cb	280	"Unable to bind socket for address %s:%d - %s.",
a4d04587	281	s, p, strerror(errno));
	282	close(lis->fd);
	283	lis->fd = -1;
49d87452 MS	284
	285	if (FatalErrors & CUPSD_FATAL_LISTEN)
	286	cupsdEndProcess(getpid(), 0);
	287
a4d04587	288	continue;
a4d04587	289	}
bd7854cb	290
ef416fc2	291	/*
a4d04587	292	* Listen for new clients.
ef416fc2	293	*/
bd7854cb	294
a4d04587	295	if (listen(lis->fd, ListenBackLog) < 0)
	296	{
	297	cupsdLogMessage(CUPSD_LOG_ERROR,
bd7854cb	298	"Unable to listen for clients on address %s:%d - %s.",
a4d04587	299	s, p, strerror(errno));
49d87452 MS	300
	301	close(lis->fd);
	302	lis->fd = -1;
	303
	304	if (FatalErrors & CUPSD_FATAL_LISTEN)
	305	cupsdEndProcess(getpid(), 0);
	306
	307	continue;
a4d04587	308	}
ef416fc2	309	}
ef416fc2	310
a4d04587	311	fcntl(lis->fd, F_SETFD, fcntl(lis->fd, F_GETFD) \| FD_CLOEXEC);
ef416fc2	312
ef416fc2	313	if (p)
bd7854cb	314	cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s:%d on fd %d...",
ef416fc2	315	s, p, lis->fd);
ef416fc2	316	else
4400e98d	317	{
bd7854cb	318	cupsdLogMessage(CUPSD_LOG_INFO, "Listening to %s on fd %d...",
ef416fc2	319	s, lis->fd);
ef416fc2	320
4400e98d	321	if (chmod(s, 0140777))
4400e98d	322	cupsdLogMessage(CUPSD_LOG_ERROR,
bd7854cb	323	"Unable to change permisssions on domain socket "
bd7854cb	324	"\"%s\" - %s", s, strerror(errno));
4400e98d	325	}
4400e98d	326
ef416fc2	327	/*
	328	* Save the first port that is bound to the local loopback or
	329	* "any" address...
	330	*/
	331
8ca02f3c	332	if ((!LocalPort \|\| LocalEncryption == HTTP_ENCRYPT_ALWAYS) && p > 0 &&
ef416fc2	333	(httpAddrLocalhost(&(lis->address)) \|\|
	334	httpAddrAny(&(lis->address))))
	335	{
	336	LocalPort = p;
	337	LocalEncryption = lis->encryption;
	338	}
	339
	340	#ifdef AF_LOCAL
	341	if (lis->address.addr.sa_family == AF_LOCAL && !have_domain)
	342	have_domain = lis->address.un.sun_path;
	343	#endif /* AF_LOCAL */
	344	}
	345
	346	/*
	347	* Make sure that we are listening on localhost!
	348	*/
	349
	350	if (!LocalPort && !have_domain)
	351	{
	352	cupsdLogMessage(CUPSD_LOG_EMERG,
07725fee	353	"No Listen or Port lines were found to allow access via "
07725fee	354	"localhost!");
ef416fc2	355
49d87452 MS	356	if (FatalErrors & (CUPSD_FATAL_CONFIG \| CUPSD_FATAL_LISTEN))
49d87452 MS	357	cupsdEndProcess(getpid(), 0);
ef416fc2	358	}
	359
	360	/*
	361	* Set the CUPS_SERVER, IPP_PORT, and CUPS_ENCRYPTION variables based on
	362	* the listeners...
	363	*/
	364
	365	if (have_domain)
	366	{
	367	/*
	368	* Use domain sockets for the local connection...
	369	*/
	370
	371	cupsdSetEnv("CUPS_SERVER", have_domain);
8ca02f3c	372
8ca02f3c	373	LocalEncryption = HTTP_ENCRYPT_IF_REQUESTED;
ef416fc2	374	}
	375	else
	376	{
	377	/*
	378	* Use the default local loopback address for the server...
	379	*/
	380
	381	cupsdSetEnv("CUPS_SERVER", "localhost");
	382	}
	383
	384	cupsdSetEnv("CUPS_ENCRYPTION", encryptions[LocalEncryption]);
07725fee	385
	386	if (LocalPort)
	387	cupsdSetEnvf("IPP_PORT", "%d", LocalPort);
ef416fc2	388
	389	/*
	390	* Resume listening for connections...
	391	*/
	392
	393	cupsdResumeListening();
	394	}
	395
	396
	397	/*
	398	* 'cupsdStopListening()' - Close all listening sockets...
	399	*/
	400
	401	void
	402	cupsdStopListening(void)
	403	{
ef416fc2	404	cupsd_listener_t lis; / Current listening socket */
	405
	406
bd7854cb	407	cupsdLogMessage(CUPSD_LOG_DEBUG2,
ef416fc2	408	"cupsdStopListening: closing all listen sockets.");
	409
	410	cupsdPauseListening();
	411
bd7854cb	412	for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
	413	lis;
	414	lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
ef416fc2	415	{
a4d04587	416	if (lis->fd != -1)
a4d04587	417	{
ef416fc2	418	#ifdef WIN32
a4d04587	419	closesocket(lis->fd);
ef416fc2	420	#else
a4d04587	421	close(lis->fd);
ef416fc2	422	#endif /* WIN32 */
	423
	424	#ifdef AF_LOCAL
4400e98d	425	/*
	426	* Remove domain sockets...
	427	*/
ef416fc2	428
4400e98d	429	# ifdef HAVE_LAUNCH_H
	430	if (lis->address.addr.sa_family == AF_LOCAL && !Launchd)
	431	# else
a4d04587	432	if (lis->address.addr.sa_family == AF_LOCAL)
4400e98d	433	# endif /* HAVE_LAUNCH_H */
a4d04587	434	unlink(lis->address.un.sun_path);
ef416fc2	435	#endif /* AF_LOCAL */
a4d04587	436	}
ef416fc2	437	}
	438	}
	439
	440
	441	/*
b19ccc9e	442	* End of "$Id: listen.c 7918 2008-09-08 22:03:01Z mike $".
ef416fc2	443	*/