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Fix duplicate local printers in DNS-SD discovery (Issue #1531) #1573

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Fix duplicate local printers in DNS-SD discovery (Issue #1531) #1573

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24 changes: 24 additions & 0 deletions cups/dest.c
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,8 @@ typedef struct _cups_dnssd_data_s // Enumeration data
cups_array_t *devices; // Devices found so far
int num_dests; // Number of lpoptions destinations
cups_dest_t *dests; // lpoptions destinations
int num_local; // Number of local cupsd queues
cups_dest_t *local_dests; // Local cupsd queues
char def_name[1024], // Default printer name, if any
*def_instance; // Default printer instance, if any
} _cups_dnssd_data_t;
Expand Down Expand Up @@ -2845,6 +2847,26 @@ cups_dest_query_cb(
if (!have_pdf && !have_raster)
device->state = _CUPS_DNSSD_INCOMPATIBLE;
}
else if (!_cups_strcasecmp(key, "rp"))
{
// Suppress local printer being re-discovered via DNS-SD
const char *rp_name = value;
int i;

if (!_cups_strncasecmp(rp_name, "printers/", 9))
rp_name += 9;

for (i = 0; i < data->num_local; i++)
{
if (!_cups_strcasecmp(rp_name, data->local_dests[i].name))
{
device->state = _CUPS_DNSSD_INCOMPATIBLE;
DEBUG_printf("6cups_dest_query_cb: "
"Suppressing local printer '%s'.", rp_name);
break;
}
}
}
else if (!_cups_strcasecmp(key, "printer-type"))
{
// Value is either NNNN or 0xXXXX
Expand Down Expand Up @@ -3177,6 +3199,8 @@ cups_enum_dests(
{
// Get the list of local printers and pass them to the callback function...
num_dests = _cupsGetDests(http, IPP_OP_CUPS_GET_PRINTERS, NULL, &dests, data.type, data.mask);
data.num_local = num_dests;
data.local_dests = dests;

if (data.def_name[0])
{
Expand Down
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