cups/patches/cups-1.5.2-avahi-5-services.patch

diff -up cups-1.5.0/cgi-bin/admin.c.avahi-5-services cups-1.5.0/cgi-bin/admin.c
--- cups-1.5.0/cgi-bin/admin.c.avahi-5-services	2011-05-20 04:49:49.000000000 +0100
+++ cups-1.5.0/cgi-bin/admin.c	2011-10-19 11:53:32.123177998 +0100
@@ -1643,7 +1643,7 @@ do_config_server(http_t *http)		/* I - H
       else
 	local_protocols[0] = '\0';
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
       if (cgiGetVariable("BROWSE_LOCAL_DNSSD"))
       {
 	if (local_protocols[0])
@@ -1651,7 +1651,7 @@ do_config_server(http_t *http)		/* I - H
 	else
 	  strcat(local_protocols, "dnssd");
       }
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 #ifdef HAVE_LDAP
       if (cgiGetVariable("BROWSE_LOCAL_LDAP"))
@@ -2718,9 +2718,9 @@ do_menu(http_t *http)			/* I - HTTP conn
 #endif /* HAVE_GSSAPI */
   cgiSetVariable("KERBEROS", "");
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   cgiSetVariable("HAVE_DNSSD", "1");
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 #ifdef HAVE_LDAP
   cgiSetVariable("HAVE_LDAP", "1");
diff -up cups-1.5.0/scheduler/client.c.avahi-5-services cups-1.5.0/scheduler/client.c
--- cups-1.5.0/scheduler/client.c.avahi-5-services	2011-06-10 22:16:18.000000000 +0100
+++ cups-1.5.0/scheduler/client.c	2011-10-19 11:53:32.127177926 +0100
@@ -4987,7 +4987,7 @@ valid_host(cupsd_client_t *con)		/* I -
 	    !strncmp(host, "[::1]:", 6));
   }
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
  /*
   * Check if the hostname is something.local (Bonjour); if so, allow it.
   */
@@ -4996,7 +4996,7 @@ valid_host(cupsd_client_t *con)		/* I -
       (!_cups_strcasecmp(end, ".local") || !_cups_strncasecmp(end, ".local:", 7) ||
        !_cups_strcasecmp(end, ".local.") || !_cups_strncasecmp(end, ".local.:", 8)))
     return (1);
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
  /*
   * Check if the hostname is an IP address...
diff -up cups-1.5.0/scheduler/conf.c.avahi-5-services cups-1.5.0/scheduler/conf.c
--- cups-1.5.0/scheduler/conf.c.avahi-5-services	2011-10-19 11:53:31.895182225 +0100
+++ cups-1.5.0/scheduler/conf.c	2011-10-19 11:53:32.131177850 +0100
@@ -651,7 +651,7 @@ cupsdReadConfiguration(void)
   Browsing                 = CUPS_DEFAULT_BROWSING;
   DefaultShared            = CUPS_DEFAULT_DEFAULT_SHARED;
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   cupsdSetString(&DNSSDRegType, "_ipp._tcp,_cups");
 #endif /* HAVE_DNSSD */
 
diff -up cups-1.5.0/scheduler/dirsvc.c.avahi-5-services cups-1.5.0/scheduler/dirsvc.c
--- cups-1.5.0/scheduler/dirsvc.c.avahi-5-services	2011-10-19 11:53:32.011180075 +0100
+++ cups-1.5.0/scheduler/dirsvc.c	2011-10-19 11:53:58.916681461 +0100
@@ -27,6 +27,7 @@
  *   ldap_connect()             - Start new LDAP connection
  *   ldap_reconnect()           - Reconnect to LDAP Server
  *   ldap_disconnect()          - Disconnect from LDAP Server
+ *   cupsdStartAvahiClient()    - Start an Avahi client if needed
  *   cupsdStartBrowsing()       - Start sending and receiving broadcast
  *                                information.
  *   cupsdStartPolling()        - Start polling servers as needed.
@@ -40,11 +41,12 @@
  *   dequote()                  - Remote quotes from a string.
  *   dnssdAddAlias()            - Add a DNS-SD alias name.
  *   dnssdBuildTxtRecord()      - Build a TXT record from printer info.
- *   dnssdComparePrinters()     - Compare the registered names of two printers.
  *   dnssdDeregisterPrinter()   - Stop sending broadcast information for a
  *                                printer.
  *   dnssdPackTxtRecord()       - Pack an array of key/value pairs into the TXT
  *                                record format.
+ *   avahiPackTxtRecord()       - Pack an array of key/value pairs into an
+ *                                AvahiStringList.
  *   dnssdRegisterCallback()    - DNSServiceRegister callback.
  *   dnssdRegisterPrinter()     - Start sending broadcast information for a
  *                                printer or update the broadcast contents.
@@ -83,6 +85,7 @@
  */
 
 #include "cupsd.h"
+#include <assert.h>
 #include <grp.h>
 
 #ifdef HAVE_DNSSD
@@ -97,6 +100,17 @@
 #    endif /* HAVE_SYSTEMCONFIGURATION */
 #  endif /* __APPLE__ */
 #endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+#  include <avahi-common/domain.h>
+#endif /* HAVE_AVAHI */
+
+
+#ifdef HAVE_DNSSD
+typedef char *cupsd_txt_record_t;
+#endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+typedef AvahiStringList *cupsd_txt_record_t;
+#endif /* HAVE_AVAHI */
 
 
 /*
@@ -159,27 +173,38 @@ static void	update_polling(void);
 static void	update_smb(int onoff);
 
 
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
+static cupsd_txt_record_t dnssdBuildTxtRecord(int *txt_len, cupsd_printer_t *p,
+					      int for_lpd);
+static void	dnssdDeregisterPrinter(cupsd_printer_t *p);
+static void	dnssdRegisterPrinter(cupsd_printer_t *p);
+static void	dnssdStop(void);
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
+
 #ifdef HAVE_DNSSD
 #  ifdef HAVE_COREFOUNDATION
 static void	dnssdAddAlias(const void *key, const void *value,
 		              void *context);
 #  endif /* HAVE_COREFOUNDATION */
-static char	*dnssdBuildTxtRecord(int *txt_len, cupsd_printer_t *p,
-		                     int for_lpd);
-static int	dnssdComparePrinters(cupsd_printer_t *a, cupsd_printer_t *b);
-static void	dnssdDeregisterPrinter(cupsd_printer_t *p);
-static char	*dnssdPackTxtRecord(int *txt_len, char *keyvalue[][2],
-		                    int count);
 static void	dnssdRegisterCallback(DNSServiceRef sdRef,
 		                      DNSServiceFlags flags,
 				      DNSServiceErrorType errorCode,
 				      const char *name, const char *regtype,
 				      const char *domain, void *context);
-static void	dnssdRegisterPrinter(cupsd_printer_t *p);
-static void	dnssdStop(void);
 static void	dnssdUpdate(void);
 #endif /* HAVE_DNSSD */
 
+#ifdef HAVE_AVAHI
+static AvahiStringList *avahiPackTxtRecord(char *keyvalue[][2],
+					   int count);
+static void	avahi_entry_group_cb (AvahiEntryGroup *group,
+				      AvahiEntryGroupState state,
+				      void *userdata);
+static void	avahi_client_cb (AvahiClient *client,
+				 AvahiClientState state,
+				 void *userdata);
+#endif /* HAVE_AVAHI */
+
 #ifdef HAVE_LDAP
 static const char * const ldap_attrs[] =/* CUPS LDAP attributes */
 		{
@@ -283,10 +308,10 @@ cupsdDeregisterPrinter(
     ldap_dereg_printer(p);
 #endif /* HAVE_LDAP */
 
-#ifdef HAVE_DNSSD
-  if (removeit && (BrowseLocalProtocols & BROWSE_DNSSD) && DNSSDRef)
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
+  if (removeit && (BrowseLocalProtocols & BROWSE_DNSSD))
     dnssdDeregisterPrinter(p);
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 }
 
 
@@ -702,10 +727,10 @@ cupsdRegisterPrinter(cupsd_printer_t *p)
     slpRegisterPrinter(p); */
 #endif /* HAVE_LIBSLP */
 
-#ifdef HAVE_DNSSD
-  if ((BrowseLocalProtocols & BROWSE_DNSSD) && DNSSDRef)
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
+  if ((BrowseLocalProtocols & BROWSE_DNSSD))
     dnssdRegisterPrinter(p);
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 }
 
 
@@ -1419,6 +1444,36 @@ ldap_disconnect(LDAP *ld)		/* I - LDAP h
 #endif /* HAVE_LDAP */
 
 
+#ifdef HAVE_AVAHI
+/*
+ * 'cupsdStartAvahiClient()' - Start an Avahi client if needed
+ */
+
+void
+cupsdStartAvahiClient(void)
+{
+  int error = 0;
+
+  if (!AvahiCupsClient && !AvahiCupsClientConnecting)
+  {
+    if (!AvahiCupsPollHandle)
+      AvahiCupsPollHandle = avahi_cups_poll_new ();
+
+    if (AvahiCupsPollHandle)
+    {
+      if (avahi_client_new (avahi_cups_poll_get (AvahiCupsPollHandle),
+			    AVAHI_CLIENT_NO_FAIL,
+			    avahi_client_cb, NULL,
+			    &error) != NULL)
+	AvahiCupsClientConnecting = 1;
+      else
+	cupsdLogMessage (CUPSD_LOG_WARN, "Avahi client failed: %d", error);
+    }
+  }
+}
+#endif /* HAVE_AVAHI */
+
+  
 /*
  * 'cupsdStartBrowsing()' - Start sending and receiving broadcast information.
  */
@@ -1542,13 +1597,16 @@ cupsdStartBrowsing(void)
   else
     BrowseSocket = -1;
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   if ((BrowseLocalProtocols | BrowseRemoteProtocols) & BROWSE_DNSSD)
   {
+#ifdef HAVE_DNSSD
     DNSServiceErrorType error;		/* Error from service creation */
+#endif /* HAVE_DNSSD */
     cupsd_listener_t	*lis;		/* Current listening socket */
 
 
+#ifdef HAVE_DNSSD
    /*
     * First create a "master" connection for all registrations...
     */
@@ -1573,6 +1631,7 @@ cupsdStartBrowsing(void)
       fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
 
       cupsdAddSelect(fd, (cupsd_selfunc_t)dnssdUpdate, NULL, NULL);
+#endif /* HAVE_DNSSD */
 
      /*
       * Then get the port we use for registrations.  If we are not listening
@@ -1598,17 +1657,23 @@ cupsdStartBrowsing(void)
       */
 
       if (BrowseRemoteProtocols & BROWSE_DNSSD)
-        DNSSDPrinters = cupsArrayNew((cups_array_func_t)dnssdComparePrinters,
-	                             NULL);
+	  DNSSDPrinters = cupsArrayNew(NULL, NULL);
 
      /*
       * Set the computer name and register the web interface...
       */
 
       cupsdUpdateDNSSDName();
+
+#ifdef HAVE_AVAHI
+      cupsdStartAvahiClient ();
+#endif /* HAVE_AVAHI */
+
+#ifdef HAVE_DNSSD
     }
-  }
 #endif /* HAVE_DNSSD */
+  }
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 #ifdef HAVE_LIBSLP
   if ((BrowseLocalProtocols | BrowseRemoteProtocols) & BROWSE_SLP)
@@ -1834,10 +1899,10 @@ cupsdStopBrowsing(void)
     BrowseSocket = -1;
   }
 
-#ifdef HAVE_DNSSD
-  if ((BrowseLocalProtocols & BROWSE_DNSSD) && DNSSDRef)
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
+  if ((BrowseLocalProtocols & BROWSE_DNSSD))
     dnssdStop();
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 #ifdef HAVE_LIBSLP
   if (((BrowseLocalProtocols | BrowseRemoteProtocols) & BROWSE_SLP) &&
@@ -1902,7 +1967,7 @@ cupsdStopPolling(void)
 }
 
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 /*
  * 'cupsdUpdateDNSSDName()' - Update the computer name we use for browsing...
  */
@@ -1910,8 +1975,14 @@ cupsdStopPolling(void)
 void
 cupsdUpdateDNSSDName(void)
 {
+#ifdef HAVE_DNSSD
   DNSServiceErrorType error;		/* Error from service creation */
   char		webif[1024];		/* Web interface share name */
+#endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+  int		ret;			/* Error from service creation */
+  char		webif[AVAHI_LABEL_MAX];	/* Web interface share name */
+#endif /* HAVE_AVAHI */
 #  ifdef HAVE_SYSTEMCONFIGURATION
   SCDynamicStoreRef sc;			/* Context for dynamic store */
   CFDictionaryRef btmm;			/* Back-to-My-Mac domains */
@@ -2042,6 +2113,7 @@ cupsdUpdateDNSSDName(void)
     else
       strlcpy(webif, "CUPS Web Interface", sizeof(webif));
 
+#ifdef HAVE_DNSSD
     if (WebIFRef)
       DNSServiceRefDeallocate(WebIFRef);
 
@@ -2054,9 +2126,45 @@ cupsdUpdateDNSSDName(void)
 				    NULL)) != kDNSServiceErr_NoError)
       cupsdLogMessage(CUPSD_LOG_ERROR,
 		      "DNS-SD web interface registration failed: %d", error);
+#endif /* HAVE_DNSSD */
+
+#ifdef HAVE_AVAHI
+    if (!AvahiCupsClient)
+     /*
+      * Client not yet running.
+      */
+      return;
+
+    if (AvahiWebIFGroup)
+      avahi_entry_group_reset (AvahiWebIFGroup);
+    else
+      AvahiWebIFGroup = avahi_entry_group_new (AvahiCupsClient,
+					       avahi_entry_group_cb,
+					       NULL);
+
+    if (AvahiWebIFGroup)
+    {
+      ret = avahi_entry_group_add_service (AvahiWebIFGroup,
+					   AVAHI_IF_UNSPEC,
+					   AVAHI_PROTO_UNSPEC,
+					   0, /* flags */
+					   webif, /* name */
+					   "_http._tcp", /* type */
+					   NULL, /* domain */
+					   NULL, /* host */
+					   DNSSDPort, /* port */
+					   "path=/", NULL);
+      if (ret == 0)
+	ret = avahi_entry_group_commit (AvahiWebIFGroup);
+
+      if (ret != 0)
+	cupsdLogMessage (CUPSD_LOG_ERROR,
+			 "Avahi web interface registration failed: %d", ret);
+    }
+#endif /* HAVE_AVAHI */
   }
 }
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 
 #ifdef HAVE_LDAP
@@ -2334,13 +2442,15 @@ dnssdAddAlias(const void *key,		/* I - K
                     "Bad Back to My Mac domain in dynamic store!");
 }
 #  endif /* HAVE_COREFOUNDATION */
+#endif /* HAVE_DNSSD */
 
 
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 /*
  * 'dnssdBuildTxtRecord()' - Build a TXT record from printer info.
  */
 
-static char *				/* O - TXT record */
+static cupsd_txt_record_t		/* O - TXT record */
 dnssdBuildTxtRecord(
     int             *txt_len,		/* O - TXT record length */
     cupsd_printer_t *p,			/* I - Printer information */
@@ -2379,7 +2489,12 @@ dnssdBuildTxtRecord(
   keyvalue[i  ][0] = "ty";
   keyvalue[i++][1] = p->make_model ? p->make_model : "Unknown";
 
-  snprintf(admin_hostname, sizeof(admin_hostname), "%s.local.", DNSSDHostName);
+  snprintf(admin_hostname, sizeof(admin_hostname),
+	   "%s.local"
+#ifdef HAVE_DNSSD
+	   "." /* terminating dot no good for Avahi */
+#endif /* HAVE_DNSSD */
+	   , DNSSDHostName);
   httpAssembleURIf(HTTP_URI_CODING_ALL, adminurl_str, sizeof(adminurl_str),
                    "http", NULL, admin_hostname, DNSSDPort, "/%s/%s",
 		   (p->type & CUPS_PRINTER_CLASS) ? "classes" : "printers",
@@ -2462,19 +2577,12 @@ dnssdBuildTxtRecord(
   * Then pack them into a proper txt record...
   */
 
+#ifdef HAVE_DNSSD
   return (dnssdPackTxtRecord(txt_len, keyvalue, i));
-}
-
-
-/*
- * 'dnssdComparePrinters()' - Compare the registered names of two printers.
- */
-
-static int				/* O - Result of comparison */
-dnssdComparePrinters(cupsd_printer_t *a,/* I - First printer */
-                     cupsd_printer_t *b)/* I - Second printer */
-{
-  return (_cups_strcasecmp(a->reg_name, b->reg_name));
+#endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+  return (avahiPackTxtRecord(keyvalue, i));
+#endif /* HAVE_AVAHI */
 }
 
 
@@ -2489,6 +2597,10 @@ dnssdDeregisterPrinter(
 {
   cupsdLogMessage(CUPSD_LOG_DEBUG2, "dnssdDeregisterPrinter(%s)", p->name);
 
+#ifdef HAVE_DNSSD
+  if (!DNSSDRef)
+    return;
+
  /*
   * Closing the socket deregisters the service
   */
@@ -2524,6 +2636,24 @@ dnssdDeregisterPrinter(
     free(p->printer_txt);
     p->printer_txt = NULL;
   }
+#endif /* HAVE_DNSSD */
+
+#ifdef HAVE_AVAHI
+  if (p->avahi_group)
+    {
+      avahi_entry_group_reset (p->avahi_group);
+      avahi_entry_group_free (p->avahi_group);
+      p->avahi_group = NULL;
+
+      if (p->ipp_txt)
+	avahi_string_list_free (p->ipp_txt);
+
+      if (p->printer_txt)
+	avahi_string_list_free (p->printer_txt);
+
+      p->ipp_txt = p->printer_txt = NULL;
+    }
+#endif /* HAVE_AVAHI */
 
  /*
   * Remove the printer from the array of DNS-SD printers, then clear the
@@ -2533,8 +2663,10 @@ dnssdDeregisterPrinter(
   cupsArrayRemove(DNSSDPrinters, p);
   cupsdClearString(&p->reg_name);
 }
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 
+#ifdef HAVE_DNSSD
 /*
  * 'dnssdPackTxtRecord()' - Pack an array of key/value pairs into the
  *                          TXT record format.
@@ -2644,8 +2776,10 @@ dnssdRegisterCallback(
     LastEvent |= CUPSD_EVENT_PRINTER_MODIFIED;
   }
 }
+#endif /* HAVE_DNSSD */
 
 
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 /*
  * 'dnssdRegisterPrinter()' - Start sending broadcast information for a printer
  *		              or update the broadcast contents.
@@ -2654,20 +2788,40 @@ dnssdRegisterCallback(
 static void
 dnssdRegisterPrinter(cupsd_printer_t *p)/* I - Printer */
 {
+#ifdef HAVE_DNSSD
   DNSServiceErrorType	se;		/* dnssd errors */
   char			*ipp_txt,	/* IPP TXT record buffer */
 			*printer_txt,	/* LPD TXT record buffer */
-			name[1024],	/* Service name */
-			*nameptr;	/* Pointer into name */
+			name[1024];	/* Service name */
   int			ipp_len,	/* IPP TXT record length */
 			printer_len,	/* LPD TXT record length */
 			printer_port;	/* LPD port number */
+#endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+  int			ret;		/* Error code */
+  AvahiStringList	*ipp_txt,	/* IPP TXT record */
+			*printer_txt;	/* LPD TXT record */
+  char			name[AVAHI_LABEL_MAX],	/* Service name */
+			fullsubtype[AVAHI_LABEL_MAX]; /* Full subtype */
+  char			*regtype_copy,	/* Writeable copy of reg type */
+			*subtype,	/* Current service sub type */
+			*nextsubtype;	/* Next service sub type */
+#endif /* HAVE_AVAHI */
+  char			*nameptr;	/* Pointer into name */
   const char		*regtype;	/* Registration type */
 
 
+#ifdef HAVE_DNSSD
+  if (!DNSSDRef)
+    return;
+
   cupsdLogMessage(CUPSD_LOG_DEBUG2, "dnssdRegisterPrinter(%s) %s", p->name,
                   !p->ipp_ref ? "new" : "update");
-
+#endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+  cupsdLogMessage(CUPSD_LOG_DEBUG2, "dnssdRegisterPrinter(%s) %s", p->name,
+		  !p->avahi_group ? "new" : "update");
+#endif /* HAVE_AVAHI */
  /*
   * If per-printer sharing was just disabled make sure we're not
   * registered before returning.
@@ -2686,12 +2840,36 @@ dnssdRegisterPrinter(cupsd_printer_t *p)
   if (p->info && strlen(p->info) > 0)
   {
     if (DNSSDComputerName)
-      snprintf(name, sizeof(name), "%s @ %s", p->info, DNSSDComputerName);
+    {
+     /*
+      * Make sure there is room for at least 15 characters of
+      * DNSSDComputerName.
+      */
+
+      assert(sizeof(name) >= 15 + 4);
+      nameptr = name + strlcpy(name, p->info,
+			       sizeof(name) - 4 -
+			       strnlen(DNSSDComputerName, 15));
+      nameptr += strlcpy(nameptr, " @ ", sizeof(name) - (nameptr - name));
+      strlcpy(nameptr, DNSSDComputerName, sizeof(name) - (nameptr - name));
+    }
     else
       strlcpy(name, p->info, sizeof(name));
   }
   else if (DNSSDComputerName)
-    snprintf(name, sizeof(name), "%s @ %s", p->name, DNSSDComputerName);
+  {
+   /*
+    * Make sure there is room for at least 15 characters of
+    * DNSSDComputerName.
+    */
+
+    assert(sizeof(name) >= 15 + 4);
+    nameptr = name + strlcpy(name, p->info,
+			     sizeof(name) - 4 -
+			     strnlen(DNSSDComputerName, 15));
+    nameptr += strlcpy(nameptr, " @ ", sizeof(name) - (nameptr - name));
+    strlcpy(nameptr, DNSSDComputerName, sizeof(name) - (nameptr - name));
+  }
   else
     strlcpy(name, p->name, sizeof(name));
 
@@ -2712,6 +2890,7 @@ dnssdRegisterPrinter(cupsd_printer_t *p)
   * Register IPP and (optionally) LPD...
   */
 
+#ifdef HAVE_DNSSD
   ipp_len = 0;				/* anti-compiler-warning-code */
   ipp_txt = dnssdBuildTxtRecord(&ipp_len, p, 0);
 
@@ -2884,6 +3063,209 @@ dnssdRegisterPrinter(cupsd_printer_t *p)
 
   if (printer_txt)
     free(printer_txt);
+#endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+  if (!AvahiCupsClient)
+   /*
+    * Client not running yet.  The client callback will call us again later.
+    */
+    return;
+
+  ipp_txt = dnssdBuildTxtRecord(NULL, p, 0);
+  printer_txt = dnssdBuildTxtRecord(NULL, p, 1);
+  regtype = (p->type & CUPS_PRINTER_FAX) ? "_fax-ipp._tcp" : DNSSDRegType;
+
+  if (p->avahi_group && p->ipp_txt && ipp_txt &&
+      !avahi_string_list_equal (p->ipp_txt, ipp_txt))
+  {
+   /*
+    * Update the existing registration...
+    */
+
+    avahi_string_list_free (p->ipp_txt);
+
+    if (p->printer_txt)
+      avahi_string_list_free (p->printer_txt);
+
+   /*
+    * Update the service group entry.
+    */
+
+    regtype_copy = strdup (regtype);
+    subtype = strchr (regtype_copy, ',');
+    if (subtype)
+      *subtype = '\0';
+
+    cupsdLogMessage (CUPSD_LOG_DEBUG,
+		     "Updating TXT record for %s (%s)", name, regtype_copy);
+    ret = avahi_entry_group_update_service_txt_strlst (p->avahi_group,
+						       AVAHI_IF_UNSPEC,
+						       AVAHI_PROTO_UNSPEC,
+						       0, name,
+						       regtype_copy,
+						       NULL, ipp_txt);
+    free (regtype_copy);
+
+    if (ret < 0)
+      goto update_failed;
+
+    p->ipp_txt = ipp_txt;
+    ipp_txt = NULL;
+
+    if (BrowseLocalProtocols & BROWSE_LPD)
+    {
+      ret = avahi_entry_group_update_service_txt_strlst (p->avahi_group,
+							 AVAHI_IF_UNSPEC,
+							 AVAHI_PROTO_UNSPEC,
+							 0, name,
+							 "_printer._tcp", NULL,
+							 printer_txt);
+      if (ret < 0)
+	goto update_failed;
+
+      p->printer_txt = printer_txt;
+      printer_txt = NULL;
+    }
+
+    ret = avahi_entry_group_commit (p->avahi_group);
+    if (ret < 0)
+    {
+    update_failed:
+      cupsdLogMessage (CUPSD_LOG_ERROR,
+		       "Failed to update TXT record for %s: %d",
+		       name, ret);
+      avahi_entry_group_reset (p->avahi_group);
+      avahi_entry_group_free (p->avahi_group);
+      p->avahi_group = NULL;
+      ipp_txt = p->ipp_txt;
+      p->ipp_txt = NULL;
+    }
+  }
+
+  if (!p->avahi_group)
+  {
+   /*
+    * Initial registration.  Use the _fax subtype for fax queues...
+    */
+
+    p->avahi_group = avahi_entry_group_new (AvahiCupsClient,
+					    avahi_entry_group_cb,
+					    p);
+
+    cupsdLogMessage(CUPSD_LOG_DEBUG,
+		    "Registering Avahi printer %s with name \"%s\" and "
+		    "type \"%s\"", p->name, name, regtype);
+
+    if (!p->avahi_group)
+    {
+      ret = 0;
+      goto add_failed;
+    }
+
+   /*
+    * Add each service type (DNSSDRegType may contain several,
+    * separated by commas).
+    */
+
+    subtype = regtype_copy = strdup (regtype);
+    while (subtype && *subtype)
+    {
+      nextsubtype = strchr (subtype, ',');
+      if (nextsubtype)
+	*nextsubtype++ = '\0';
+
+      if (subtype == regtype_copy)
+      {
+       /*
+	* Main type entry.
+	*/
+
+	cupsdLogMessage (CUPSD_LOG_DEBUG,
+			 "Adding TXT record for %s (%s)", name, regtype_copy);
+	ret = avahi_entry_group_add_service_strlst (p->avahi_group,
+						    AVAHI_IF_UNSPEC,
+						    AVAHI_PROTO_UNSPEC,
+						    0, name, regtype_copy,
+						    NULL, NULL,
+						    DNSSDPort,
+						    ipp_txt);
+      }
+      else
+      {
+       /*
+	* Sub-type entry.
+	*/
+
+	snprintf (fullsubtype, sizeof(fullsubtype),
+		  "%s._sub.%s", subtype, regtype_copy);
+	cupsdLogMessage (CUPSD_LOG_DEBUG,
+			 "Adding TXT record for %s (%s)", name, fullsubtype);
+	ret = avahi_entry_group_add_service_subtype (p->avahi_group,
+						     AVAHI_IF_UNSPEC,
+						     AVAHI_PROTO_UNSPEC,
+						     0, name,
+						     regtype_copy,
+						     NULL, fullsubtype);
+      }
+
+      if (ret < 0)
+      {
+	free (regtype_copy);
+	goto add_failed;
+      }
+
+      subtype = nextsubtype;
+    }
+
+    free (regtype_copy);
+    p->ipp_txt = ipp_txt;
+    ipp_txt = NULL;
+
+    if (BrowseLocalProtocols & BROWSE_LPD)
+    {
+      cupsdLogMessage(CUPSD_LOG_DEBUG,
+		      "Registering Avahi printer %s with name \"%s\" and "
+		      "type \"_printer._tcp\"", p->name, name);
+
+      ret = avahi_entry_group_add_service_strlst (p->avahi_group,
+						  AVAHI_IF_UNSPEC,
+						  AVAHI_PROTO_UNSPEC,
+						  0, name,
+						  "_printer._tcp", NULL, NULL,
+						  515,
+						  printer_txt);
+      if (ret < 0)
+	goto add_failed;
+
+      p->printer_txt = printer_txt;
+      printer_txt = NULL;
+    }
+
+    ret = avahi_entry_group_commit (p->avahi_group);
+
+    if (ret < 0)
+    {
+    add_failed:
+      cupsdLogMessage (CUPSD_LOG_ERROR,
+		       "Failed to add Avahi entry for %s: %d",
+		       name, ret);
+      if (p->avahi_group)
+      {
+	avahi_entry_group_reset (p->avahi_group);
+	avahi_entry_group_free (p->avahi_group);
+	p->avahi_group = NULL;
+      }
+      ipp_txt = p->ipp_txt;
+      p->ipp_txt = NULL;
+    }
+  }
+
+  if (ipp_txt)
+    avahi_string_list_free (ipp_txt);
+
+  if (printer_txt)
+    avahi_string_list_free (printer_txt);
+#endif /* HAVE_AVAHI */
 }
 
 
@@ -2896,6 +3278,10 @@ dnssdStop(void)
 {
   cupsd_printer_t	*p;		/* Current printer */
 
+#ifdef HAVE_DNSSD
+  if (!DNSSDRef)
+    return;
+#endif /* HAVE_DNSSD */
 
  /*
   * De-register the individual printers
@@ -2906,6 +3292,7 @@ dnssdStop(void)
        p = (cupsd_printer_t *)cupsArrayNext(Printers))
     dnssdDeregisterPrinter(p);
 
+#ifdef HAVE_DNSSD
  /*
   * Shutdown the rest of the service refs...
   */
@@ -2926,14 +3313,17 @@ dnssdStop(void)
 
   DNSServiceRefDeallocate(DNSSDRef);
   DNSSDRef = NULL;
+#endif /* HAVE_DNSSD */
 
   cupsArrayDelete(DNSSDPrinters);
   DNSSDPrinters = NULL;
 
   DNSSDPort = 0;
 }
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
 
+#ifdef HAVE_DNSSD
 /*
  * 'dnssdUpdate()' - Handle DNS-SD queries.
  */
@@ -2955,6 +3345,153 @@ dnssdUpdate(void)
 #endif /* HAVE_DNSSD */
 
 
+#ifdef HAVE_AVAHI
+/*
+ * 'avahiPackTxtRecord()' - Pack an array of key/value pairs into an
+ *                          AvahiStringList.
+ */
+
+static AvahiStringList *		/* O - new string list */
+avahiPackTxtRecord(char *keyvalue[][2],	/* I - Table of key value pairs */
+		   int count)		/* I - Number of items in table */
+{
+  AvahiStringList *strlst = NULL;
+  char **elements;
+  size_t len;
+  int i = 0;
+
+  elements = malloc ((1 + count) * sizeof (char *));
+  if (!elements)
+    goto cleanup;
+
+  for (i = 0; i < count; i++)
+    {
+      len = (1 + strlen (keyvalue[i][0]) +
+	     (keyvalue[i][1] ? 1 + strlen (keyvalue[i][1]) : 1));
+      elements[i] = malloc (len * sizeof (char));
+      if (!elements[i])
+	goto cleanup;
+
+      snprintf (elements[i], len, "%s=%s", keyvalue[i][0], keyvalue[i][1]);
+    }
+
+  strlst = avahi_string_list_new_from_array ((const char **) elements, count);
+
+cleanup:
+  while (--i >= 0)
+    free (elements[i]);
+
+  free (elements);
+  return (strlst);
+}
+
+
+/*
+ * 'avahi_entry_group_cb()' - Avahi entry group callback function.
+ */
+static void
+avahi_entry_group_cb (AvahiEntryGroup *group,
+		      AvahiEntryGroupState state,
+		      void *userdata)
+{
+  char *name;
+
+  if (userdata)
+    name = ((cupsd_printer_t *) userdata)->reg_name;
+  else
+    name = "CUPS web interface";
+
+  switch (state)
+  {
+  case AVAHI_ENTRY_GROUP_UNCOMMITED:
+  case AVAHI_ENTRY_GROUP_REGISTERING:
+    break;
+
+  case AVAHI_ENTRY_GROUP_ESTABLISHED:
+    cupsdLogMessage (CUPSD_LOG_DEBUG,
+		     "Avahi entry group established for %s", name);
+    break;
+
+  default:
+    cupsdLogMessage (CUPSD_LOG_DEBUG,
+		     "Avahi entry group %s has state %d",
+		     name, state);
+    break;
+  }
+}
+
+
+/*
+ * 'avahi_client_cb()' - Avahi client callback function.
+ */
+static void
+avahi_client_cb (AvahiClient *client,
+		 AvahiClientState state,
+		 void *userdata)
+{
+  cupsd_printer_t *printer;
+  switch (state)
+  {
+  case AVAHI_CLIENT_S_RUNNING:
+   /*
+    * Avahi client started successfully.
+    */
+    AvahiCupsClient = client;
+    AvahiCupsClientConnecting = 0;
+    cupsdLogMessage (CUPSD_LOG_DEBUG, "Avahi client started");
+
+    cupsdUpdateDNSSDName ();
+
+    for (printer = (cupsd_printer_t *)cupsArrayFirst(Printers);
+	 printer;
+	 printer = (cupsd_printer_t *)cupsArrayNext(Printers))
+      if (Browsing && (BrowseLocalProtocols & BROWSE_DNSSD) &&
+	  (!(printer->type & (CUPS_PRINTER_REMOTE | CUPS_PRINTER_IMPLICIT |
+			      CUPS_PRINTER_SCANNER))) && printer->shared)
+	dnssdRegisterPrinter (printer);
+
+    break;
+
+  case AVAHI_CLIENT_CONNECTING:
+   /*
+    * No Avahi daemon, client is waiting.
+    */
+    cupsdLogMessage (CUPSD_LOG_DEBUG, "Avahi client connecting");
+    break;
+
+  case AVAHI_CLIENT_S_REGISTERING:
+    /*
+     * Not yet registered.
+     */
+    cupsdLogMessage (CUPSD_LOG_DEBUG, "Avahi client registering");
+    break;
+
+  case AVAHI_CLIENT_FAILURE:
+   /*
+    * Avahi client failed, close it to allow a clean restart.
+    */
+    cupsdLogMessage (CUPSD_LOG_ERROR,
+		     "Avahi client failed, "
+		     "closing client to allow a clean restart");
+
+    for (printer = (cupsd_printer_t *)cupsArrayFirst(Printers);
+	 printer;
+	 printer = (cupsd_printer_t *)cupsArrayNext(Printers))
+      dnssdDeregisterPrinter (printer);
+
+    avahi_client_free(client);
+    AvahiCupsClientConnecting = 0;
+    AvahiCupsClient = NULL;
+
+    break;
+
+  default:
+    cupsdLogMessage (CUPSD_LOG_DEBUG, "Avahi client state: %d", state);
+  }
+}
+#endif /* HAVE_AVAHI */
+
+
 /*
  * 'get_auth_info_required()' - Get the auth-info-required value to advertise.
  */
diff -up cups-1.5.0/scheduler/dirsvc.h.avahi-5-services cups-1.5.0/scheduler/dirsvc.h
--- cups-1.5.0/scheduler/dirsvc.h.avahi-5-services	2011-03-21 02:12:14.000000000 +0000
+++ cups-1.5.0/scheduler/dirsvc.h	2011-10-19 11:53:32.138177721 +0100
@@ -31,6 +31,10 @@
 #  endif /* HAVE_LDAP_SSL_H */
 #endif /* HAVE_LDAP */
 
+#ifdef HAVE_AVAHI
+#  include <avahi-client/publish.h>
+#endif /* HAVE_AVAHI */
+
 /*
  * Browse protocols...
  */
@@ -131,19 +135,22 @@ VAR int			PollPipe	VALUE(0);
 VAR cupsd_statbuf_t	*PollStatusBuffer VALUE(NULL);
 					/* Status buffer for pollers */
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 VAR char		*DNSSDComputerName VALUE(NULL),
 					/* Computer/server name */
 			*DNSSDHostName	VALUE(NULL),
 					/* Hostname */
 			*DNSSDRegType VALUE(NULL);
 					/* Bonjour registration type */
-VAR cups_array_t	*DNSSDAlias	VALUE(NULL);
-					/* List of dynamic ServerAlias's */
 VAR int			DNSSDPort	VALUE(0);
 					/* Port number to register */
 VAR cups_array_t	*DNSSDPrinters	VALUE(NULL);
 					/* Printers we have registered */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
+
+#ifdef HAVE_DNSSD
+VAR cups_array_t	*DNSSDAlias	VALUE(NULL);
+					/* List of dynamic ServerAlias's */
 VAR DNSServiceRef	DNSSDRef	VALUE(NULL),
 					/* Master DNS-SD service reference */
 			WebIFRef	VALUE(NULL),
@@ -152,6 +159,17 @@ VAR DNSServiceRef	DNSSDRef	VALUE(NULL),
 					/* Remote printer browse reference */
 #endif /* HAVE_DNSSD */
 
+#ifdef HAVE_AVAHI
+VAR AvahiCupsPoll	*AvahiCupsPollHandle	VALUE(NULL);
+					/* AvahiCupsPoll object */
+VAR AvahiClient		*AvahiCupsClient	VALUE(NULL);
+					/* AvahiClient object */
+VAR int			AvahiCupsClientConnecting	VALUE(0);
+					/* Is AvahiClient object connecting? */
+VAR AvahiEntryGroup	*AvahiWebIFGroup	VALUE(NULL);
+					/* Web interface entry group */
+#endif /* HAVE_AVAHI */
+
 #ifdef HAVE_LIBSLP
 VAR SLPHandle		BrowseSLPHandle	VALUE(NULL);
 					/* SLP API handle */
@@ -195,13 +213,14 @@ extern void	cupsdRegisterPrinter(cupsd_p
 extern void	cupsdRestartPolling(void);
 extern void	cupsdSaveRemoteCache(void);
 extern void	cupsdSendBrowseList(void);
+extern void	cupsdStartAvahiClient(void);
 extern void	cupsdStartBrowsing(void);
 extern void	cupsdStartPolling(void);
 extern void	cupsdStopBrowsing(void);
 extern void	cupsdStopPolling(void);
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 extern void	cupsdUpdateDNSSDName(void);
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 #ifdef HAVE_LDAP
 extern void	cupsdUpdateLDAPBrowse(void);
 #endif /* HAVE_LDAP */
diff -up cups-1.5.0/scheduler/ipp.c.avahi-5-services cups-1.5.0/scheduler/ipp.c
--- cups-1.5.0/scheduler/ipp.c.avahi-5-services	2011-10-19 11:53:31.978180686 +0100
+++ cups-1.5.0/scheduler/ipp.c	2011-10-19 11:53:32.147177555 +0100
@@ -6096,7 +6096,7 @@ copy_printer_attrs(
     ippAddDate(con->response, IPP_TAG_PRINTER, "printer-current-time",
                ippTimeToDate(curtime));
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   if (!ra || cupsArrayFind(ra, "printer-dns-sd-name"))
   {
     if (printer->reg_name)
@@ -6106,7 +6106,7 @@ copy_printer_attrs(
       ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_NOVALUE,
                    "printer-dns-sd-name", 0);
   }
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
   if (!ra || cupsArrayFind(ra, "printer-error-policy"))
     ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_NAME,
diff -up cups-1.5.0/scheduler/main.c.avahi-5-services cups-1.5.0/scheduler/main.c
--- cups-1.5.0/scheduler/main.c.avahi-5-services	2011-10-19 11:53:32.101178406 +0100
+++ cups-1.5.0/scheduler/main.c	2011-10-19 11:53:32.151177479 +0100
@@ -120,6 +120,10 @@ main(int  argc,				/* I - Number of comm
   cupsd_listener_t	*lis;		/* Current listener */
   time_t		current_time,	/* Current time */
 			activity,	/* Client activity timer */
+#ifdef HAVE_AVAHI
+			avahi_client_time, /* Time for next Avahi client
+					      check */
+#endif /* HAVE_AVAHI */
 			browse_time,	/* Next browse send time */
 			senddoc_time,	/* Send-Document time */
 			expire_time,	/* Subscription expire time */
@@ -672,6 +676,9 @@ main(int  argc,				/* I - Number of comm
   */
 
   current_time  = time(NULL);
+#ifdef HAVE_AVAHI
+  avahi_client_time = current_time;
+#endif /* HAVE_AVAHI */
   browse_time   = current_time;
   event_time    = current_time;
   expire_time   = current_time;
@@ -894,6 +901,16 @@ main(int  argc,				/* I - Number of comm
     tmo = cupsdNextTimeout (&tmo_delay);
     if (tmo && tmo_delay == 0)
       cupsdRunTimeout (tmo);
+
+   /*
+    * Try to restart the Avahi client every 10 seconds if needed...
+    */
+
+    if ((current_time - avahi_client_time) >= 10)
+    {
+      avahi_client_time = current_time;
+      cupsdStartAvahiClient();
+    }
 #endif /* HAVE_AVAHI */
 
 #ifndef __APPLE__
diff -up cups-1.5.0/scheduler/printers.c.avahi-5-services cups-1.5.0/scheduler/printers.c
--- cups-1.5.0/scheduler/printers.c.avahi-5-services	2011-10-19 11:53:31.916181835 +0100
+++ cups-1.5.0/scheduler/printers.c	2011-10-19 11:53:32.156177388 +0100
@@ -883,9 +883,9 @@ cupsdDeletePrinter(
   cupsdClearString(&p->alert);
   cupsdClearString(&p->alert_description);
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   cupsdClearString(&p->pdl);
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 
   cupsArrayDelete(p->filetypes);
 
@@ -3787,7 +3787,7 @@ add_printer_formats(cupsd_printer_t *p)
     attr->values[i].string.text = _cupsStrAlloc(mimetype);
   }
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   {
     char		pdl[1024];	/* Buffer to build pdl list */
     mime_filter_t	*filter;	/* MIME filter looping var */
@@ -3843,7 +3843,7 @@ add_printer_formats(cupsd_printer_t *p)
 
     cupsdSetString(&p->pdl, pdl);
   }
-#endif /* HAVE_DNSSD */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
 }
 
 
diff -up cups-1.5.0/scheduler/printers.h.avahi-5-services cups-1.5.0/scheduler/printers.h
--- cups-1.5.0/scheduler/printers.h.avahi-5-services	2011-03-18 18:42:46.000000000 +0000
+++ cups-1.5.0/scheduler/printers.h	2011-10-19 11:53:32.157177369 +0100
@@ -16,6 +16,9 @@
 #ifdef HAVE_DNSSD
 #  include <dns_sd.h>
 #endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+#  include "avahi.h"
+#endif /* HAVE_AVAHI */
 #include <cups/pwg-private.h>
 
 
@@ -95,16 +98,23 @@ struct cupsd_printer_s
   time_t	marker_time;		/* Last time marker attributes were updated */
   _ppd_cache_t	*pc;			/* PPD cache and mapping data */
 
-#ifdef HAVE_DNSSD
+#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   char		*reg_name,		/* Name used for service registration */
-		*pdl,			/* pdl value for TXT record */
-		*ipp_txt,		/* IPP TXT record contents */
+		*pdl;			/* pdl value for TXT record */
+#endif /* defined(HAVE_DNSSD) || defined(HAVE_AVAHI) */
+#ifdef HAVE_DNSSD
+  char		*ipp_txt,		/* IPP TXT record contents */
 		*printer_txt;		/* LPD TXT record contents */
   int		ipp_len,		/* IPP TXT record length */
 		printer_len;		/* LPD TXT record length */
   DNSServiceRef	ipp_ref,		/* Reference for _ipp._tcp,_cups */
 		printer_ref;		/* Reference for _printer._tcp */
 #endif /* HAVE_DNSSD */
+#ifdef HAVE_AVAHI
+  AvahiStringList *ipp_txt,		/* IPP TXT record */
+		*printer_txt;		/* LPD TXT record */
+  AvahiEntryGroup *avahi_group;		/* Avahi entry group */
+#endif /* HAVE_AVAHI */
 };
 
 