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-rw-r--r--abs/extra/cups/cups-avahi-2-backend.patch1118
1 files changed, 1118 insertions, 0 deletions
diff --git a/abs/extra/cups/cups-avahi-2-backend.patch b/abs/extra/cups/cups-avahi-2-backend.patch
new file mode 100644
index 0000000..00e12a0
--- /dev/null
+++ b/abs/extra/cups/cups-avahi-2-backend.patch
@@ -0,0 +1,1118 @@
+diff -up cups-1.5.3/backend/dnssd.c.avahi-2-backend cups-1.5.3/backend/dnssd.c
+--- cups-1.5.3/backend/dnssd.c.avahi-2-backend 2012-05-15 16:53:18.164774446 +0200
++++ cups-1.5.3/backend/dnssd.c 2012-05-15 17:09:07.684155704 +0200
+@@ -15,14 +15,21 @@
+ *
+ * Contents:
+ *
++ * next_txt_record() - Get next TXT record from a cups_txt_records_t.
++ * parse_txt_record_pair() - Read key/value pair in cups_txt_records_t.
+ * main() - Browse for printers.
+ * browse_callback() - Browse devices.
+ * browse_local_callback() - Browse local devices.
+ * compare_devices() - Compare two devices.
+ * exec_backend() - Execute the backend that corresponds to the
+ * resolved service name.
++ * device_type() - Get DNS-SD type enumeration from string.
+ * get_device() - Create or update a device.
+ * query_callback() - Process query data.
++ * avahi_client_callback() - Avahi client callback function.
++ * avahi_query_callback() - Avahi query callback function.
++ * avahi_browse_callback() - Avahi browse callback function.
++ * find_device() - Find a device from its name and domain.
+ * sigterm_handler() - Handle termination signals...
+ * unquote() - Unquote a name string.
+ */
+@@ -33,7 +40,18 @@
+
+ #include "backend-private.h"
+ #include <cups/array.h>
+-#include <dns_sd.h>
++#ifdef HAVE_DNSSD
++# include <dns_sd.h>
++#endif /* HAVE_DNSSD */
++#ifdef HAVE_AVAHI
++# include <avahi-client/client.h>
++# include <avahi-client/lookup.h>
++# include <avahi-common/simple-watch.h>
++# include <avahi-common/domain.h>
++# include <avahi-common/error.h>
++# include <avahi-common/malloc.h>
++#define kDNSServiceMaxDomainName AVAHI_DOMAIN_NAME_MAX
++#endif /* HAVE_AVAHI */
+
+
+ /*
+@@ -53,7 +71,12 @@ typedef enum
+
+ typedef struct
+ {
++#ifdef HAVE_DNSSD
+ DNSServiceRef ref; /* Service reference for resolve */
++#endif /* HAVE_DNSSD */
++#ifdef HAVE_AVAHI
++ int resolved; /* Did we resolve the device? */
++#endif /* HAVE_AVAHI */
+ char *name, /* Service name */
+ *domain, /* Domain name */
+ *fullName, /* Full name */
+@@ -65,6 +88,20 @@ typedef struct
+ sent; /* Did we list the device? */
+ } cups_device_t;
+
++typedef struct
++{
++ char key[256];
++ char value[256];
++
++#ifdef HAVE_DNSSD
++ const uint8_t *data;
++ const uint8_t *datanext;
++ const uint8_t *dataend;
++#else /* HAVE_AVAHI */
++ AvahiStringList *txt;
++#endif /* HAVE_DNSSD */
++} cups_txt_records_t;
++
+
+ /*
+ * Local globals...
+@@ -78,6 +115,7 @@ static int job_canceled = 0;
+ * Local functions...
+ */
+
++#ifdef HAVE_DNSSD
+ static void browse_callback(DNSServiceRef sdRef,
+ DNSServiceFlags flags,
+ uint32_t interfaceIndex,
+@@ -95,13 +133,6 @@ static void browse_local_callback(DNSSe
+ const char *replyDomain,
+ void *context)
+ __attribute__((nonnull(1,5,6,7,8)));
+-static int compare_devices(cups_device_t *a, cups_device_t *b);
+-static void exec_backend(char **argv);
+-static cups_device_t *get_device(cups_array_t *devices,
+- const char *serviceName,
+- const char *regtype,
+- const char *replyDomain)
+- __attribute__((nonnull(1,2,3,4)));
+ static void query_callback(DNSServiceRef sdRef,
+ DNSServiceFlags flags,
+ uint32_t interfaceIndex,
+@@ -111,10 +142,119 @@ static void query_callback(DNSServiceRe
+ const void *rdata, uint32_t ttl,
+ void *context)
+ __attribute__((nonnull(1,5,9,11)));
++#endif /* HAVE_DNSSD */
++#ifdef HAVE_AVAHI
++static void avahi_client_callback (AvahiClient *client,
++ AvahiClientState state,
++ void *context);
++static void avahi_browse_callback (AvahiServiceBrowser *browser,
++ AvahiIfIndex interface,
++ AvahiProtocol protocol,
++ AvahiBrowserEvent event,
++ const char *serviceName,
++ const char *regtype,
++ const char *replyDomain,
++ AvahiLookupResultFlags flags,
++ void *context);
++#endif /* HAVE_AVAHI */
++static cups_device_t * find_device (cups_array_t *devices,
++ cups_txt_records_t *txt,
++ cups_device_t *dkey);
++static int compare_devices(cups_device_t *a, cups_device_t *b);
++static void exec_backend(char **argv);
++static cups_device_t *get_device(cups_array_t *devices,
++ const char *serviceName,
++ const char *regtype,
++ const char *replyDomain)
++ __attribute__((nonnull(1,2,3,4)));
+ static void sigterm_handler(int sig);
+ static void unquote(char *dst, const char *src, size_t dstsize)
+ __attribute__((nonnull(1,2)));
+
++#ifdef HAVE_AVAHI
++static AvahiSimplePoll *simple_poll = NULL;
++static int avahi_got_callback;
++#endif /* HAVE_AVAHI */
++
++
++/*
++ * 'next_txt_record()' - Get next TXT record from a cups_txt_records_t.
++ */
++
++static cups_txt_records_t *
++next_txt_record (cups_txt_records_t *txt)
++{
++#ifdef HAVE_DNSSD
++ txt->data = txt->datanext;
++#else /* HAVE_AVAHI */
++ txt->txt = avahi_string_list_get_next (txt->txt);
++ if (txt->txt == NULL)
++ return NULL;
++#endif /* HAVE_DNSSD */
++
++ return txt;
++}
++
++
++/*
++ * 'parse_txt_record_pair()' - Read key/value pair in cups_txt_records_t.
++ */
++
++static int
++parse_txt_record_pair (cups_txt_records_t *txt)
++{
++#ifdef HAVE_DNSSD
++ uint8_t datalen;
++ uint8_t *data = txt->data;
++ char *ptr;
++
++ /*
++ * Read a key/value pair starting with an 8-bit length. Since the
++ * length is 8 bits and the size of the key/value buffers is 256, we
++ * don't need to check for overflow...
++ */
++
++ datalen = *data++;
++ if (!datalen || (data + datalen) > txt->dataend)
++ return NULL;
++ txt->datanext = data + datalen;
++
++ for (ptr = txt->key; data < txt->datanext && *data != '='; data ++)
++ *ptr++ = *data;
++ *ptr = '\0';
++
++ if (data < txt->datanext && *data == '=')
++ {
++ data++;
++
++ if (data < datanext)
++ memcpy (txt->value, data, txt->datanext - data);
++ value[txt->datanext - data] = '\0';
++ }
++ else
++ return 1;
++#else /* HAVE_AVAHI */
++ char *key, *value;
++ size_t len;
++ avahi_string_list_get_pair (txt->txt, &key, &value, &len);
++ if (len > sizeof (txt->value) - 1)
++ len = sizeof (txt->value) - 1;
++
++ memcpy (txt->value, value, len);
++ txt->value[len] = '\0';
++ len = strlen (key);
++ if (len > sizeof (txt->key) - 1)
++ len = sizeof (txt->key) - 1;
++
++ memcpy (txt->key, key, len);
++ txt->key[len] = '\0';
++ avahi_free (key);
++ avahi_free (value);
++#endif /* HAVE_AVAHI */
++
++ return 0;
++}
++
+
+ /*
+ * 'main()' - Browse for printers.
+@@ -125,6 +265,13 @@ main(int argc, /* I - Number of comm
+ char *argv[]) /* I - Command-line arguments */
+ {
+ const char *name; /* Backend name */
++ cups_array_t *devices; /* Device array */
++ cups_device_t *device; /* Current device */
++ char uriName[1024]; /* Unquoted fullName for URI */
++#ifdef HAVE_DNSSD
++ int fd; /* Main file descriptor */
++ fd_set input; /* Input set for select() */
++ struct timeval timeout; /* Timeout for select() */
+ DNSServiceRef main_ref, /* Main service reference */
+ fax_ipp_ref, /* IPP fax service reference */
+ ipp_ref, /* IPP service reference */
+@@ -138,12 +285,11 @@ main(int argc, /* I - Number of comm
+ pdl_datastream_ref, /* AppSocket service reference */
+ printer_ref, /* LPD service reference */
+ riousbprint_ref; /* Remote IO service reference */
+- int fd; /* Main file descriptor */
+- fd_set input; /* Input set for select() */
+- struct timeval timeout; /* Timeout for select() */
+- cups_array_t *devices; /* Device array */
+- cups_device_t *device; /* Current device */
+- char uriName[1024]; /* Unquoted fullName for URI */
++#endif /* HAVE_DNSSD */
++#ifdef HAVE_AVAHI
++ AvahiClient *client;
++ int error;
++#endif /* HAVE_AVAHI */
+ #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
+ struct sigaction action; /* Actions for POSIX signals */
+ #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
+@@ -203,6 +349,49 @@ main(int argc, /* I - Number of comm
+ * Browse for different kinds of printers...
+ */
+
++#ifdef HAVE_AVAHI
++ if ((simple_poll = avahi_simple_poll_new ()) == NULL)
++ {
++ perror ("ERROR: Unable to create avahi simple poll object");
++ return (1);
++ }
++
++ client = avahi_client_new (avahi_simple_poll_get (simple_poll),
++ 0, avahi_client_callback, NULL, &error);
++ if (!client)
++ {
++ perror ("DEBUG: Unable to create avahi client");
++ return (0);
++ }
++
++ avahi_service_browser_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ "_fax-ipp._tcp", NULL, 0,
++ avahi_browse_callback, devices);
++ avahi_service_browser_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ "_ipp._tcp", NULL, 0,
++ avahi_browse_callback, devices);
++ avahi_service_browser_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ "_ipp-tls._tcp", NULL, 0,
++ avahi_browse_callback, devices);
++ avahi_service_browser_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ "_pdl-datastream._tcp",
++ NULL, 0,
++ avahi_browse_callback,
++ devices);
++ avahi_service_browser_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ "_printer._tcp", NULL, 0,
++ avahi_browse_callback, devices);
++ avahi_service_browser_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ "_riousbprint._tcp", NULL, 0,
++ avahi_browse_callback, devices);
++#endif /* HAVE_AVAHI */
++#ifdef HAVE_DNSSD
+ if (DNSServiceCreateConnection(&main_ref) != kDNSServiceErr_NoError)
+ {
+ perror("ERROR: Unable to create service connection");
+@@ -263,6 +452,7 @@ main(int argc, /* I - Number of comm
+ riousbprint_ref = main_ref;
+ DNSServiceBrowse(&riousbprint_ref, kDNSServiceFlagsShareConnection, 0,
+ "_riousbprint._tcp", NULL, browse_callback, devices);
++#endif /* HAVE_DNSSD */
+
+ /*
+ * Loop until we are killed...
+@@ -270,6 +460,9 @@ main(int argc, /* I - Number of comm
+
+ while (!job_canceled)
+ {
++ int announce = 0;
++
++#ifdef HAVE_DNSSD
+ FD_ZERO(&input);
+ FD_SET(fd, &input);
+
+@@ -289,11 +482,35 @@ main(int argc, /* I - Number of comm
+ }
+ else
+ {
++ announce = 1;
++ }
++#else /* HAVE_AVAHI */
++ int r;
++ avahi_got_callback = 0;
++ r = avahi_simple_poll_iterate (simple_poll, 1);
++ if (r != 0 && r != EINTR)
++ {
++ /*
++ * We've been told to exit the loop. Perhaps the connection to
++ * avahi failed.
++ */
++
++ break;
++ }
++
++ if (avahi_got_callback)
++ announce = 1;
++#endif /* HAVE_DNSSD */
++
++ if (announce)
++ {
+ /*
+ * Announce any devices we've found...
+ */
+
++#ifdef HAVE_DNSSD
+ DNSServiceErrorType status; /* DNS query status */
++#endif /* HAVE_DNSSD */
+ cups_device_t *best; /* Best matching device */
+ char device_uri[1024]; /* Device URI */
+ int count; /* Number of queries */
+@@ -307,6 +524,7 @@ main(int argc, /* I - Number of comm
+ if (device->sent)
+ sent ++;
+
++#ifdef HAVE_DNSSD
+ if (device->ref)
+ count ++;
+
+@@ -338,14 +556,23 @@ main(int argc, /* I - Number of comm
+ count ++;
+ }
+ }
+- else if (!device->sent)
++ else
++#endif /* HAVE_DNSSD */
++#ifdef HAVE_AVAHI
++ if (!device->resolved)
++ continue;
++ else
++#endif /* HAVE_AVAHI */
++ if (!device->sent)
+ {
++#ifdef HAVE_DNSSD
+ /*
+ * Got the TXT records, now report the device...
+ */
+
+ DNSServiceRefDeallocate(device->ref);
+ device->ref = 0;
++#endif /* HAVE_DNSSD */
+
+ if (!best)
+ best = device;
+@@ -406,6 +633,7 @@ main(int argc, /* I - Number of comm
+ }
+
+
++#ifdef HAVE_DNSSD
+ /*
+ * 'browse_callback()' - Browse devices.
+ */
+@@ -494,6 +722,7 @@ browse_local_callback(
+ device->fullName);
+ device->sent = 1;
+ }
++#endif /* HAVE_DNSSD */
+
+
+ /*
+@@ -574,6 +803,41 @@ exec_backend(char **argv) /* I - Comman
+
+
+ /*
++ * 'device_type()' - Get DNS-SD type enumeration from string.
++ */
++
++static int
++device_type (const char *regtype)
++{
++#ifdef HAVE_AVAHI
++ if (!strcmp(regtype, "_ipp._tcp"))
++ return (CUPS_DEVICE_IPP);
++ else if (!strcmp(regtype, "_ipps._tcp") ||
++ !strcmp(regtype, "_ipp-tls._tcp"))
++ return (CUPS_DEVICE_IPPS);
++ else if (!strcmp(regtype, "_fax-ipp._tcp"))
++ return (CUPS_DEVICE_FAX_IPP);
++ else if (!strcmp(regtype, "_printer._tcp"))
++ return (CUPS_DEVICE_PDL_DATASTREAM);
++#else
++ if (!strcmp(regtype, "_ipp._tcp."))
++ return (CUPS_DEVICE_IPP);
++ else if (!strcmp(regtype, "_ipps._tcp.") ||
++ !strcmp(regtype, "_ipp-tls._tcp."))
++ return (CUPS_DEVICE_IPPS);
++ else if (!strcmp(regtype, "_fax-ipp._tcp."))
++ return (CUPS_DEVICE_FAX_IPP);
++ else if (!strcmp(regtype, "_printer._tcp."))
++ return (CUPS_DEVICE_PRINTER);
++ else if (!strcmp(regtype, "_pdl-datastream._tcp."))
++ return (CUPS_DEVICE_PDL_DATASTREAM);
++#endif /* HAVE_AVAHI */
++
++ return (CUPS_DEVICE_RIOUSBPRINT);
++}
++
++
++/*
+ * 'get_device()' - Create or update a device.
+ */
+
+@@ -594,20 +858,7 @@ get_device(cups_array_t *devices, /* I -
+ */
+
+ key.name = (char *)serviceName;
+-
+- if (!strcmp(regtype, "_ipp._tcp."))
+- key.type = CUPS_DEVICE_IPP;
+- else if (!strcmp(regtype, "_ipps._tcp.") ||
+- !strcmp(regtype, "_ipp-tls._tcp."))
+- key.type = CUPS_DEVICE_IPPS;
+- else if (!strcmp(regtype, "_fax-ipp._tcp."))
+- key.type = CUPS_DEVICE_FAX_IPP;
+- else if (!strcmp(regtype, "_printer._tcp."))
+- key.type = CUPS_DEVICE_PRINTER;
+- else if (!strcmp(regtype, "_pdl-datastream._tcp."))
+- key.type = CUPS_DEVICE_PDL_DATASTREAM;
+- else
+- key.type = CUPS_DEVICE_RIOUSBPRINT;
++ key.type = device_type (regtype);
+
+ for (device = cupsArrayFind(devices, &key);
+ device;
+@@ -627,8 +878,14 @@ get_device(cups_array_t *devices, /* I -
+ free(device->domain);
+ device->domain = strdup(replyDomain);
+
++#ifdef HAVE_DNSSD
+ DNSServiceConstructFullName(fullName, device->name, regtype,
+ replyDomain);
++#else /* HAVE_AVAHI */
++ avahi_service_name_join (fullName, kDNSServiceMaxDomainName,
++ serviceName, regtype, replyDomain);
++#endif /* HAVE_DNSSD */
++
+ free(device->fullName);
+ device->fullName = strdup(fullName);
+ }
+@@ -648,6 +905,9 @@ get_device(cups_array_t *devices, /* I -
+ device->domain = strdup(replyDomain);
+ device->type = key.type;
+ device->priority = 50;
++#ifdef HAVE_AVAHI
++ device->resolved = 0;
++#endif /* HAVE_AVAHI */
+
+ cupsArrayAdd(devices, device);
+
+@@ -655,13 +915,20 @@ get_device(cups_array_t *devices, /* I -
+ * Set the "full name" of this service, which is used for queries...
+ */
+
++#ifdef HAVE_DNSSD
+ DNSServiceConstructFullName(fullName, serviceName, regtype, replyDomain);
++#else /* HAVE_AVAHI */
++ avahi_service_name_join (fullName, kDNSServiceMaxDomainName,
++ serviceName, regtype, replyDomain);
++#endif /* HAVE_DNSSD */
++
+ device->fullName = strdup(fullName);
+
+ return (device);
+ }
+
+
++#ifdef HAVE_DNSSD
+ /*
+ * 'query_callback()' - Process query data.
+ */
+@@ -685,7 +952,7 @@ query_callback(
+ *ptr; /* Pointer into string */
+ cups_device_t dkey, /* Search key */
+ *device; /* Device */
+-
++ cups_txt_records_t txt;
+
+ fprintf(stderr, "DEBUG2: query_callback(sdRef=%p, flags=%x, "
+ "interfaceIndex=%d, errorCode=%d, fullName=\"%s\", "
+@@ -719,94 +986,233 @@ query_callback(
+ if ((ptr = strstr(name, "._")) != NULL)
+ *ptr = '\0';
+
+- if (strstr(fullName, "_ipp._tcp."))
+- dkey.type = CUPS_DEVICE_IPP;
+- else if (strstr(fullName, "_ipps._tcp.") ||
+- strstr(fullName, "_ipp-tls._tcp."))
+- dkey.type = CUPS_DEVICE_IPPS;
+- else if (strstr(fullName, "_fax-ipp._tcp."))
+- dkey.type = CUPS_DEVICE_FAX_IPP;
+- else if (strstr(fullName, "_printer._tcp."))
+- dkey.type = CUPS_DEVICE_PRINTER;
+- else if (strstr(fullName, "_pdl-datastream._tcp."))
+- dkey.type = CUPS_DEVICE_PDL_DATASTREAM;
++ dkey.type = device_type (fullName);
++
++ txt.data = rdata;
++ txt.dataend = rdata + rdlen;
++ device = find_device ((cups_array_t *) context, &txt, &dkey);
++ if (!device)
++ fprintf(stderr, "DEBUG: Ignoring TXT record for \"%s\"...\n", fullName);
++}
++#endif /* HAVE_DNSSD */
++
++
++#ifdef HAVE_AVAHI
++/*
++ * 'avahi_client_callback()' - Avahi client callback function.
++ */
++
++static void
++avahi_client_callback(AvahiClient *client,
++ AvahiClientState state,
++ void *context)
++{
++ /*
++ * If the connection drops, quit.
++ */
++
++ if (state == AVAHI_CLIENT_FAILURE)
++ {
++ fprintf (stderr, "ERROR: Avahi connection failed\n");
++ avahi_simple_poll_quit (simple_poll);
++ }
++}
++
++
++/*
++ * 'avahi_query_callback()' - Avahi query callback function.
++ */
++
++static void
++avahi_query_callback(AvahiServiceResolver *resolver,
++ AvahiIfIndex interface,
++ AvahiProtocol protocol,
++ AvahiResolverEvent event,
++ const char *name,
++ const char *type,
++ const char *domain,
++ const char *host_name,
++ const AvahiAddress *address,
++ uint16_t port,
++ AvahiStringList *txt,
++ AvahiLookupResultFlags flags,
++ void *context)
++{
++ AvahiClient *client;
++ cups_device_t key,
++ *device;
++ char uqname[1024],
++ *ptr;
++ cups_txt_records_t txtr;
++
++ client = avahi_service_resolver_get_client (resolver);
++ if (event != AVAHI_RESOLVER_FOUND)
++ {
++ if (event == AVAHI_RESOLVER_FAILURE)
++ {
++ fprintf (stderr, "ERROR: %s\n",
++ avahi_strerror (avahi_client_errno (client)));
++ }
++
++ avahi_service_resolver_free (resolver);
++ return;
++ }
++
++ /*
++ * Set search key for device.
++ */
++
++ key.name = uqname;
++ unquote (uqname, name, sizeof (uqname));
++ if ((ptr = strstr(name, "._")) != NULL)
++ *ptr = '\0';
++
++ key.domain = (char *) domain;
++ key.type = device_type (type);
++
++ /*
++ * Find the device and the the TXT information.
++ */
++
++ txtr.txt = txt;
++ device = find_device ((cups_array_t *) context, &txtr, &key);
++ if (device)
++ {
++ /*
++ * Let the main loop know to announce the device.
++ */
++
++ device->resolved = 1;
++ avahi_got_callback = 1;
++ }
+ else
+- dkey.type = CUPS_DEVICE_RIOUSBPRINT;
++ fprintf (stderr, "DEBUG: Ignoring TXT record for \"%s\"...\n", name);
+
+- for (device = cupsArrayFind(devices, &dkey);
++ avahi_service_resolver_free (resolver);
++}
++
++
++/*
++ * 'avahi_browse_callback()' - Avahi browse callback function.
++ */
++
++static void
++avahi_browse_callback(AvahiServiceBrowser *browser,
++ AvahiIfIndex interface,
++ AvahiProtocol protocol,
++ AvahiBrowserEvent event,
++ const char *name,
++ const char *type,
++ const char *domain,
++ AvahiLookupResultFlags flags,
++ void *context)
++{
++ AvahiClient *client = avahi_service_browser_get_client (browser);
++
++ switch (event)
++ {
++ case AVAHI_BROWSER_FAILURE:
++ fprintf (stderr, "ERROR: %s\n",
++ avahi_strerror (avahi_client_errno (client)));
++ avahi_simple_poll_quit (simple_poll);
++ return;
++
++ case AVAHI_BROWSER_NEW:
++ /*
++ * This object is new on the network.
++ */
++
++ if (flags & AVAHI_LOOKUP_RESULT_LOCAL)
++ {
++ /*
++ * This comes from the local machine so ignore it.
++ */
++
++ fprintf (stderr, "DEBUG: ignoring local service %s\n", name);
++ }
++ else
++ {
++ /*
++ * Create a device entry for it if it doesn't yet exist.
++ */
++
++ get_device ((cups_array_t *)context, name, type, domain);
++
++ /*
++ * Now look for a TXT entry.
++ */
++
++ if (avahi_service_resolver_new (client, interface, protocol,
++ name, type, domain,
++ AVAHI_PROTO_UNSPEC, 0,
++ avahi_query_callback, context) == NULL)
++ {
++ fprintf (stderr, "ERROR: failed to resolve service %s: %s\n",
++ name, avahi_strerror (avahi_client_errno (client)));
++ }
++ }
++
++ break;
++
++ case AVAHI_BROWSER_REMOVE:
++ case AVAHI_BROWSER_ALL_FOR_NOW:
++ case AVAHI_BROWSER_CACHE_EXHAUSTED:
++ break;
++ }
++}
++#endif /* HAVE_AVAHI */
++
++
++/*
++ * 'find_device()' - Find a device from its name and domain.
++ */
++
++static cups_device_t *
++find_device (cups_array_t *devices,
++ cups_txt_records_t *txt,
++ cups_device_t *dkey)
++{
++ cups_device_t *device;
++ char *ptr;
++
++ for (device = cupsArrayFind(devices, dkey);
+ device;
+ device = cupsArrayNext(devices))
+ {
+- if (_cups_strcasecmp(device->name, dkey.name) ||
+- _cups_strcasecmp(device->domain, dkey.domain))
++ if (_cups_strcasecmp(device->name, dkey->name) ||
++ _cups_strcasecmp(device->domain, dkey->domain))
+ {
+ device = NULL;
+ break;
+ }
+- else if (device->type == dkey.type)
++ else if (device->type == dkey->type)
+ {
+ /*
+ * Found it, pull out the priority and make and model from the TXT
+ * record and save it...
+ */
+
+- const uint8_t *data, /* Pointer into data */
+- *datanext, /* Next key/value pair */
+- *dataend; /* End of entire TXT record */
+- uint8_t datalen; /* Length of current key/value pair */
+- char key[256], /* Key string */
+- value[256], /* Value string */
+- make_and_model[512],
++ char make_and_model[512],
+ /* Manufacturer and model */
+ model[256], /* Model */
+- device_id[2048];/* 1284 device ID */
+-
++ device_id[2048]; /* 1284 device ID */
+
+ device_id[0] = '\0';
+ make_and_model[0] = '\0';
+
+ strcpy(model, "Unknown");
+
+- for (data = rdata, dataend = data + rdlen;
+- data < dataend;
+- data = datanext)
++ for (;;)
+ {
+- /*
+- * Read a key/value pair starting with an 8-bit length. Since the
+- * length is 8 bits and the size of the key/value buffers is 256, we
+- * don't need to check for overflow...
+- */
+-
+- datalen = *data++;
+-
+- if (!datalen || (data + datalen) > dataend)
+- break;
+-
+- datanext = data + datalen;
+-
+- for (ptr = key; data < datanext && *data != '='; data ++)
+- *ptr++ = *data;
+- *ptr = '\0';
++ char *key;
++ char *value;
+
+- if (data < datanext && *data == '=')
+- {
+- data ++;
+-
+- if (data < datanext)
+- memcpy(value, data, datanext - data);
+- value[datanext - data] = '\0';
++ if (parse_txt_record_pair (txt))
++ goto next;
+
+- fprintf(stderr, "DEBUG2: query_callback: \"%s=%s\".\n",
+- key, value);
+- }
+- else
+- {
+- fprintf(stderr, "DEBUG2: query_callback: \"%s\" with no value.\n",
+- key);
+- continue;
+- }
+-
+- if (!_cups_strncasecmp(key, "usb_", 4))
++ key = txt->key;
++ value = txt->value;
++ if (!strncasecmp(key, "usb_", 4))
+ {
+ /*
+ * Add USB device ID information...
+@@ -861,6 +1267,10 @@ query_callback(
+ if (device->type == CUPS_DEVICE_PRINTER)
+ device->sent = 1;
+ }
++
++ next:
++ if (next_txt_record (txt) == NULL)
++ break;
+ }
+
+ if (device->device_id)
+@@ -917,11 +1327,9 @@ query_callback(
+ }
+ }
+
+- if (!device)
+- fprintf(stderr, "DEBUG: Ignoring TXT record for \"%s\"...\n", fullName);
++ return device;
+ }
+
+-
+ /*
+ * 'sigterm_handler()' - Handle termination signals...
+ */
+diff -up cups-1.5.3/cups/http-support.c.avahi-2-backend cups-1.5.3/cups/http-support.c
+--- cups-1.5.3/cups/http-support.c.avahi-2-backend 2012-02-15 02:06:12.000000000 +0100
++++ cups-1.5.3/cups/http-support.c 2012-05-15 17:04:51.045944634 +0200
+@@ -43,6 +43,10 @@
+ * http_copy_decode() - Copy and decode a URI.
+ * http_copy_encode() - Copy and encode a URI.
+ * http_resolve_cb() - Build a device URI for the given service name.
++ * avahi_resolve_uri_client_cb()
++ * - Avahi client callback for resolving URI.
++ * avahi_resolve_uri_resolver_cb()
++ * - Avahi resolver callback for resolving URI.
+ */
+
+ /*
+@@ -60,6 +64,11 @@
+ # include <sys/select.h>
+ # endif /* WIN32 */
+ #endif /* HAVE_DNSSD */
++#ifdef HAVE_AVAHI
++# include <avahi-client/client.h>
++# include <avahi-client/lookup.h>
++# include <avahi-common/simple-watch.h>
++#endif /* HAVE_AVAHI */
+
+
+ /*
+@@ -127,6 +136,24 @@ static void DNSSD_API http_resolve_cb(DN
+ void *context);
+ #endif /* HAVE_DNSSD */
+
++#ifdef HAVE_AVAHI
++static void avahi_resolve_uri_client_cb(AvahiClient *client,
++ AvahiClientState state,
++ void *simple_poll);
++static void avahi_resolve_uri_resolver_cb(AvahiServiceResolver *resolver,
++ AvahiIfIndex interface,
++ AvahiProtocol protocol,
++ AvahiResolverEvent event,
++ const char *name,
++ const char *type,
++ const char *domain,
++ const char *host_name,
++ const AvahiAddress *address,
++ uint16_t port,
++ AvahiStringList *txt,
++ AvahiLookupResultFlags flags,
++ void *context);
++#endif /* HAVE_AVAHI */
+
+ /*
+ * 'httpAssembleURI()' - Assemble a uniform resource identifier from its
+@@ -1434,6 +1461,9 @@ _httpResolveURI(
+
+ if (strstr(hostname, "._tcp"))
+ {
++#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
++ char *regtype, /* Pointer to type in hostname */
++ *domain; /* Pointer to domain in hostname */
+ #ifdef HAVE_DNSSD
+ # ifdef WIN32
+ # pragma comment(lib, "dnssd.lib")
+@@ -1452,6 +1482,17 @@ _httpResolveURI(
+ fd_set input_set; /* Input set for select() */
+ struct timeval stimeout; /* Timeout value for select() */
+ #endif /* HAVE_POLL */
++#else /* HAVE_AVAHI */
++ AvahiSimplePoll *simple_poll;
++ AvahiClient *client;
++ int error;
++ struct
++ {
++ AvahiSimplePoll *poll;
++ _http_uribuf_t uribuf;
++ } user_data;
++#endif /* HAVE_DNSSD */
++
+
+ if (options & _HTTP_RESOLVE_STDERR)
+ fprintf(stderr, "DEBUG: Resolving \"%s\"...\n", hostname);
+@@ -1488,9 +1529,16 @@ _httpResolveURI(
+ if (domain)
+ *domain++ = '\0';
+
++#ifdef HAVE_DNSSD
+ uribuf.buffer = resolved_uri;
+ uribuf.bufsize = resolved_size;
+ uribuf.options = options;
++#else
++ user_data.uribuf.buffer = resolved_uri;
++ user_data.uribuf.bufsize = resolved_size;
++ user_data.uribuf.options = options;
++#endif
++
+ resolved_uri[0] = '\0';
+
+ DEBUG_printf(("6_httpResolveURI: Resolving hostname=\"%s\", regtype=\"%s\", "
+@@ -1504,6 +1552,7 @@ _httpResolveURI(
+
+ uri = NULL;
+
++#ifdef HAVE_DNSSD
+ if (DNSServiceCreateConnection(&ref) == kDNSServiceErr_NoError)
+ {
+ localref = ref;
+@@ -1611,6 +1660,36 @@ _httpResolveURI(
+
+ DNSServiceRefDeallocate(ref);
+ }
++#else /* HAVE_AVAHI */
++ if ((simple_poll = avahi_simple_poll_new ()) != NULL)
++ {
++ if ((client = avahi_client_new (avahi_simple_poll_get (simple_poll),
++ 0, avahi_resolve_uri_client_cb,
++ &simple_poll, &error)) != NULL)
++ {
++ user_data.poll = simple_poll;
++ if (avahi_service_resolver_new (client, AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC, hostname,
++ regtype, domain, AVAHI_PROTO_UNSPEC, 0,
++ avahi_resolve_uri_resolver_cb,
++ &user_data) != NULL)
++ {
++ avahi_simple_poll_loop (simple_poll);
++
++ /*
++ * Collect the result.
++ */
++
++ if (resolved_uri[0])
++ uri = resolved_uri;
++ }
++
++ avahi_client_free (client);
++ }
++
++ avahi_simple_poll_free (simple_poll);
++ }
++#endif /* HAVE_DNSSD */
+
+ if (options & _HTTP_RESOLVE_STDERR)
+ {
+@@ -1622,13 +1701,13 @@ _httpResolveURI(
+ fputs("STATE: -connecting-to-device,offline-report\n", stderr);
+ }
+
+-#else
++#else /* HAVE_DNSSD || HAVE_AVAHI */
+ /*
+ * No DNS-SD support...
+ */
+
+ uri = NULL;
+-#endif /* HAVE_DNSSD */
++#endif /* HAVE_DNSSD || HAVE_AVAHI */
+
+ if ((options & _HTTP_RESOLVE_STDERR) && !uri)
+ _cupsLangPrintFilter(stderr, "ERROR", _("Unable to find printer."));
+@@ -1916,6 +1995,115 @@ http_resolve_cb(
+ }
+ #endif /* HAVE_DNSSD */
+
++#ifdef HAVE_AVAHI
++/*
++ * 'avahi_resolve_uri_client_cb()' - Avahi client callback for resolving URI.
++ */
++
++static void
++avahi_resolve_uri_client_cb (AvahiClient *client,
++ AvahiClientState state,
++ void *simple_poll)
++{
++ DEBUG_printf(("avahi_resolve_uri_client_callback(client=%p, state=%d, "
++ "simple_poll=%p)\n", client, state, simple_poll));
++
++ /*
++ * If the connection drops, quit.
++ */
++
++ if (state == AVAHI_CLIENT_FAILURE)
++ avahi_simple_poll_quit (simple_poll);
++}
++
++
++/*
++ * 'avahi_resolve_uri_resolver_cb()' - Avahi resolver callback for resolving
++ * URI.
++ */
++
++static void
++avahi_resolve_uri_resolver_cb (AvahiServiceResolver *resolver,
++ AvahiIfIndex interface,
++ AvahiProtocol protocol,
++ AvahiResolverEvent event,
++ const char *name,
++ const char *type,
++ const char *domain,
++ const char *host_name,
++ const AvahiAddress *address,
++ uint16_t port,
++ AvahiStringList *txt,
++ AvahiLookupResultFlags flags,
++ void *context)
++{
++ const char *scheme; /* URI scheme */
++ char rp[256]; /* Remote printer */
++ AvahiStringList *pair;
++ char *value;
++ size_t valueLen = 0;
++ char addr[AVAHI_ADDRESS_STR_MAX];
++ struct
++ {
++ AvahiSimplePoll *poll;
++ _http_uribuf_t uribuf;
++ } *poll_uribuf = context;
++
++ DEBUG_printf(("avahi_resolve_uri_resolver_callback(resolver=%p, "
++ "interface=%d, protocol=%d, event=%d, name=\"%s\", "
++ "type=\"%s\", domain=\"%s\", host_name=\"%s\", address=%p, "
++ "port=%d, txt=%p, flags=%d, context=%p)\n",
++ resolver, interface, protocol, event, name, type, domain,
++ host_name, address, port, txt, flags, context));
++
++ if (event != AVAHI_RESOLVER_FOUND)
++ {
++ avahi_service_resolver_free (resolver);
++ avahi_simple_poll_quit (poll_uribuf->poll);
++ return;
++ }
++
++ /*
++ * Figure out the scheme from the full name...
++ */
++
++ if (strstr(type, "_ipp."))
++ scheme = "ipp";
++ else if (strstr(type, "_printer."))
++ scheme = "lpd";
++ else if (strstr(type, "_pdl-datastream."))
++ scheme = "socket";
++ else
++ scheme = "riousbprint";
++
++ /*
++ * Extract the "remote printer key from the TXT record...
++ */
++
++ if ((pair = avahi_string_list_find (txt, "rp")) != NULL)
++ {
++ avahi_string_list_get_pair (pair, NULL, &value, &valueLen);
++ rp[0] = '/';
++ memcpy (rp + 1, value, valueLen);
++ rp[valueLen + 1] = '\0';
++ }
++ else
++ rp[0] = '\0';
++
++ /*
++ * Assemble the final device URI...
++ */
++
++ avahi_address_snprint (addr, AVAHI_ADDRESS_STR_MAX, address);
++ httpAssembleURI(HTTP_URI_CODING_ALL, poll_uribuf->uribuf.buffer,
++ poll_uribuf->uribuf.bufsize, scheme, NULL,
++ addr, port, rp);
++ DEBUG_printf(("avahi_resolve_uri_resolver_callback: Resolved URI is \"%s\"\n",
++ poll_uribuf->uribuf.buffer));
++ avahi_simple_poll_quit (poll_uribuf->poll);
++}
++#endif /* HAVE_AVAHI */
++
+
+ /*
+ * End of "$Id: http-support.c 10284 2012-02-15 01:06:12Z mike $". \ No newline at end of file