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cups-browsed.c
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//
// This file is part of cups-browsed.
//
// Copyright 2011-2022 OpenPrinting
// Copyright 2011-2022 Till Kamppeter
// Copyright 2013-2015 Tim Waugh
// Copyright 2018-2019 Deepak Patankar
// Copyright 2020 Mohit Mohan
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <ctype.h>
#include <errno.h>
#if defined(__OpenBSD__)
#include <sys/socket.h>
#endif // __OpenBSD__
#include <sys/types.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <resolv.h>
#include <stdio.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <time.h>
#include <signal.h>
#include <regex.h>
#include <pthread.h>
#include <glib.h>
#ifdef HAVE_AVAHI
#include <avahi-client/client.h>
#include <avahi-client/lookup.h>
#include <avahi-glib/glib-watch.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
#endif // HAVE_AVAHI
#include <gio/gio.h>
#ifdef HAVE_LDAP
# ifdef __sun
# include <lber.h>
# endif // __sun
# include <ldap.h>
# ifdef HAVE_LDAP_SSL_H
# include <ldap_ssl.h>
# endif // HAVE_LDAP_SSL_H
#endif // HAVE_LDAP
#ifdef HAVE_LDAP
LDAP *BrowseLDAPHandle = NULL;
// Handle to LDAP server
char *BrowseLDAPBindDN = NULL,
// LDAP login DN
*BrowseLDAPDN = NULL,
// LDAP search DN
*BrowseLDAPPassword = NULL,
// LDAP login password
*BrowseLDAPServer = NULL,
// LDAP server to use
*BrowseLDAPFilter = NULL;
// LDAP query filter
int BrowseLDAPUpdate = TRUE,
// enables LDAP updates
BrowseLDAPInitialised = FALSE;
// the init stuff has been done
# ifdef HAVE_LDAP_SSL
char *BrowseLDAPCACertFile = NULL;
// LDAP CA CERT file to use
# endif // HAVE_LDAP_SSL
#endif // HAVE_LDAP
#ifdef HAVE_LDAP
#define LDAP_BROWSE_FILTER "(objectclass=cupsPrinter)"
static LDAP *ldap_new_connection(void);
static LDAP *ldap_reconnect(void);
static void ldap_disconnect(LDAP *ld);
static int ldap_search_rec(LDAP *ld, char *base, int scope,
char *filter, char *attrs[],
int attrsonly, LDAPMessage **res);
static int ldap_getval_firststring(LDAP *ld, LDAPMessage *entry,
char *attr, char *retval,
unsigned long maxsize);
static void ldap_freeres(LDAPMessage *entry);
# ifdef HAVE_LDAP_REBIND_PROC
# if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
static int ldap_rebind_proc(LDAP *RebindLDAPHandle,
LDAP_CONST char *refsp,
ber_tag_t request,
ber_int_t msgid,
void *params);
# else
static int ldap_rebind_proc(LDAP *RebindLDAPHandle,
char **dnp,
char **passwdp,
int *authmethodp,
int freeit,
void *arg);
# endif // defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
# endif // HAVE_LDAP_REBIND_PROC
#endif // HAVE_LDAP
#include <cups/cups.h>
#include <cups/raster.h>
#include <cupsfilters/ipp.h>
#include <cupsfilters/ipp.h>
#include <ppd/ppd.h>
#include "cups-notifier.h"
// Attribute to mark a CUPS queue as created by us
#define CUPS_BROWSED_MARK "cups-browsed"
#define AUTO_OPTION "auto"
// Attribute to tell the implicitclass backend the destination queue for
// the current job
#define CUPS_BROWSED_DEST_PRINTER "cups-browsed-dest-printer"
// Timeout values in sec
#define TIMEOUT_IMMEDIATELY -1
#define TIMEOUT_CONFIRM 10
#define TIMEOUT_RETRY 10
#define TIMEOUT_REMOVE -1
#define TIMEOUT_CHECK_LIST 2
#define CUPS_DBUS_NAME "org.cups.cupsd.Notifier"
#define CUPS_DBUS_PATH "/org/cups/cupsd/Notifier"
#define CUPS_DBUS_INTERFACE "org.cups.cupsd.Notifier"
#define DEFAULT_CACHEDIR "/var/cache/cups"
#define DEFAULT_LOGDIR "/var/log/cups"
#define LOCAL_DEFAULT_PRINTER_FILE "/cups-browsed-local-default-printer"
#define REMOTE_DEFAULT_PRINTER_FILE "/cups-browsed-remote-default-printer"
#define SAVE_OPTIONS_FILE "/cups-browsed-options-%s"
#define DEBUG_LOG_FILE "/cups-browsed_log"
#define DEBUG_LOG_FILE_2 "/cups-browsed_previous_logs"
// Status of remote printer
typedef enum printer_status_e
{
STATUS_UNCONFIRMED = 0, // Generated in a previous session
STATUS_CONFIRMED, // Avahi confirms UNCONFIRMED printer
STATUS_TO_BE_CREATED, // Scheduled for creation
STATUS_DISAPPEARED, // Scheduled for removal
STATUS_TO_BE_RELEASED // Scheduled for release from cups-browsed
} printer_status_t;
// Data structure for taking note of each time the remote printer
// appears as a discovered IPP service
typedef struct ipp_discovery_s
{
char *interface;
char *type;
int family;
} ipp_discovery_t;
// Data structure for remote printers
typedef struct remote_printer_s
{
char *queue_name;
char *location;
char *info;
char *uri;
char *make_model;
char *pdl;
int color;
int duplex;
ipp_t *prattrs;
char *nickname;
int num_options;
cups_option_t *options;
printer_status_t status;
time_t timeout;
void *slave_of;
int last_printer;
char *host;
char *ip;
int port;
char *resource;
char *service_name;
char *type;
char *domain;
cups_array_t *ipp_discoveries;
int no_autosave;
int overwritten;
int netprinter;
int is_legacy;
int timeouted;
pthread_rwlock_t lock;
int called;
} remote_printer_t;
// Data structure for network interfaces
typedef struct netif_s
{
char *address;
http_addr_t broadcast;
} netif_t;
// Data structures for browse allow/deny rules
typedef enum browse_order_e
{
ORDER_ALLOW_DENY,
ORDER_DENY_ALLOW
} browse_order_t;
typedef enum allow_type_e
{
ALLOW_IP,
ALLOW_NET,
ALLOW_INVALID
} allow_type_t;
typedef enum allow_sense_e
{
ALLOW_ALLOW,
ALLOW_DENY
} allow_sense_t;
typedef struct allow_s
{
allow_type_t type;
allow_sense_t sense;
http_addr_t addr;
http_addr_t mask;
} allow_t;
// Data structures for browse filter rules
typedef enum filter_sense_s
{
FILTER_MATCH,
FILTER_NOT_MATCH
} filter_sense_t;
typedef struct browse_filter_s
{
filter_sense_t sense;
char *field;
char *regexp;
regex_t *cregexp;
} browse_filter_t;
// Data structure for a printer discovered using BrowsePoll
typedef struct browsepoll_printer_s
{
char *uri_supported;
char *location;
char *info;
} browsepoll_printer_t;
// Data structure for a BrowsePoll server
typedef struct browsepoll_s
{
char *server;
int port;
int major;
int minor;
gboolean can_subscribe;
int subscription_id;
int sequence_number;
// Remember which printers we discovered. This way we can just ask
// if anything has changed, and if not we know these printers are
// still there.
GList *printers; // of browsepoll_printer_t
} browsepoll_t;
// Data structure for destination list obtained with cupsEnumDests()
typedef struct dest_list_s
{
int num_dests;
cups_dest_t *dests;
} dest_list_t;
// Local printer (key is name)
typedef struct local_printer_s {
char *device_uri;
char *uuid;
gboolean cups_browsed_controlled;
} local_printer_t;
// Browse data to send for local printer
typedef struct browse_data_s
{
int type;
int state;
char *uri;
char *location;
char *info;
char *make_model;
char *browse_options;
} browse_data_t;
// Data structure for manual definition of load-balancing clusters
typedef struct cluster_s
{
char *local_queue_name;
cups_array_t *members;
} cluster_t;
// Ways how to represent the remote printer's IP in the device URI
typedef enum ip_based_uris_e
{
IP_BASED_URIS_NO,
IP_BASED_URIS_ANY,
IP_BASED_URIS_IPV4_ONLY,
IP_BASED_URIS_IPV6_ONLY
} ip_based_uris_t;
// Ways how to name local queues for remote printers
typedef enum local_queue_naming_e
{
LOCAL_QUEUE_NAMING_DNSSD,
LOCAL_QUEUE_NAMING_MAKE_MODEL,
LOCAL_QUEUE_NAMING_REMOTE_NAME
} local_queue_naming_t;
// Automatically create queues for IPP network printers: No, only for
// IPP printers, for all printers
typedef enum create_ipp_printer_queues_e
{
IPP_PRINTERS_NO,
IPP_PRINTERS_LOCAL_ONLY,
IPP_PRINTERS_PWGRASTER,
IPP_PRINTERS_APPLERASTER,
IPP_PRINTERS_PCLM,
IPP_PRINTERS_PDF,
IPP_PRINTERS_DRIVERLESS,
IPP_PRINTERS_ALL
} create_ipp_printer_queues_t;
// Ways how we can do load balancing on remote queues with the same name
typedef enum load_balancing_type_e
{
QUEUE_ON_CLIENT,
QUEUE_ON_SERVERS
} load_balancing_type_t;
// Ways how inactivity for auto-shutdown is defined
typedef enum autoshutdown_inactivity_type_e
{
NO_QUEUES,
NO_JOBS
} autoshutdown_inactivity_type_t;
typedef struct media_size_s
{
int x;
int y;
} media_size_t;
typedef struct pagesize_range_s
{
int x_dim_min;
int x_dim_max;
int y_dim_min;
int y_dim_max;
} pagesize_range_t;
typedef struct media_col_s
{
int x,y,top_margin,bottom_margin,left_margin,right_margin;
char *media_source,*media_type;
} media_col_t;
typedef struct default_str_attribute_s
{
char* value;
int count;
} default_str_attribute_t;
typedef struct resolution_count_s
{
cf_res_t *res;
int count;
} resolution_count_t;
typedef struct mediacol_count_s
{
media_col_t *data;
int count;
} mediacol_count_t;
typedef struct pagesize_count_s
{
char* pagesize;
int count;
} pagesize_count_t;
#ifdef HAVE_AVAHI
typedef struct resolver_args_s
{
AvahiIfIndex interface;
AvahiProtocol protocol;
const char *name;
const char *type;
const char *domain;
const char *host_name;
const AvahiAddress *address;
uint16_t port;
AvahiStringList *txt;
AvahiLookupResultFlags flags;
void* userdata;
} resolver_args_t;
#endif // HAVE_AVAHI
typedef struct create_args_s
{
char* queue;
char* uri;
} create_args_t;
cups_array_t *remote_printers;
static char *alt_config_file = NULL;
static cups_array_t *command_line_config;
static cups_array_t *netifs;
static cups_array_t *local_hostnames;
static cups_array_t *browseallow;
static gboolean browseallow_all = FALSE;
static gboolean browsedeny_all = FALSE;
static browse_order_t browse_order;
static cups_array_t *browsefilter;
static GHashTable *local_printers;
static GHashTable *cups_supported_remote_printers;
static browsepoll_t *local_printers_context = NULL;
static http_t *local_conn = NULL;
static gboolean inhibit_local_printers_update = FALSE;
static GList *browse_data = NULL;
static CupsNotifier *cups_notifier = NULL;
static GMainLoop *gmainloop = NULL;
#ifdef HAVE_AVAHI
static AvahiGLibPoll *glib_poll = NULL;
static AvahiClient *client = NULL;
static AvahiServiceBrowser *sb1 = NULL, *sb2 = NULL;
static int avahi_present = 0;
#endif // HAVE_AVAHI
#ifdef HAVE_LDAP
static const char * const ldap_attrs[] =// CUPS LDAP attributes
{
"printerDescription",
"printerLocation",
"printerMakeAndModel",
"printerType",
"printerURI",
NULL
};
#endif // HAVE_LDAP
static guint queues_timer_id = 0;
static int browsesocket = -1;
#define BROWSE_DNSSD (1<<0)
#define BROWSE_CUPS (1<<1)
#define BROWSE_LDAP (1<<2)
static unsigned int BrowseLocalProtocols = 0;
static unsigned int BrowseRemoteProtocols = BROWSE_DNSSD;
static unsigned int BrowseInterval = 60;
static unsigned int BrowseTimeout = 300;
static uint16_t BrowsePort = 631;
static browsepoll_t **BrowsePoll = NULL;
static unsigned int NewBrowsePollQueuesShared = 0;
static unsigned int AllowResharingRemoteCUPSPrinters = 0;
static unsigned int DebugLogFileSize = 300;
static size_t NumBrowsePoll = 0;
static guint update_netifs_sourceid = 0;
static char local_server_str[1024];
static char *DomainSocket = NULL;
static int cups_queues_updated = 0;
static int update_count = 0;
static unsigned int HttpLocalTimeout = 5;
static unsigned int HttpRemoteTimeout = 10;
static unsigned int HttpMaxRetries = 5;
static unsigned int DNSSDBasedDeviceURIs = 1;
static ip_based_uris_t IPBasedDeviceURIs = IP_BASED_URIS_NO;
#ifdef NAMING_MAKE_MODEL
static local_queue_naming_t LocalQueueNamingRemoteCUPS =
LOCAL_QUEUE_NAMING_MAKE_MODEL;
#else
# ifdef NAMING_REMOTE_NAME
static local_queue_naming_t LocalQueueNamingRemoteCUPS =
LOCAL_QUEUE_NAMING_REMOTE_NAME;
# else
static local_queue_naming_t LocalQueueNamingRemoteCUPS =
LOCAL_QUEUE_NAMING_DNSSD;
# endif
#endif
static local_queue_naming_t LocalQueueNamingIPPPrinter=LOCAL_QUEUE_NAMING_DNSSD;
static unsigned int OnlyUnsupportedByCUPS = 0;
static unsigned int UseCUPSGeneratedPPDs = 0;
static unsigned int CreateRemoteRawPrinterQueues = 0;
static unsigned int CreateRemoteCUPSPrinterQueues = 1;
#ifdef ONLY_LOCAL_IPP_PRINTERS_AUTO_SETUP
static create_ipp_printer_queues_t CreateIPPPrinterQueues =
IPP_PRINTERS_LOCAL_ONLY;
#else
#ifdef ONLY_DRIVERLESS_IPP_PRINTERS_AUTO_SETUP
static create_ipp_printer_queues_t CreateIPPPrinterQueues =
IPP_PRINTERS_DRIVERLESS;
#else
static create_ipp_printer_queues_t CreateIPPPrinterQueues =
IPP_PRINTERS_ALL;
#endif
#endif
#ifdef SAVING_CREATED_QUEUES
static unsigned int KeepGeneratedQueuesOnShutdown = 1;
#else
static unsigned int KeepGeneratedQueuesOnShutdown = 0;
#endif
static int NewIPPPrinterQueuesShared = 0;
static int AutoClustering = 1;
static cups_array_t *clusters;
static load_balancing_type_t LoadBalancingType = QUEUE_ON_CLIENT;
static char *DefaultOptions = NULL;
static int update_cups_queues_max_per_call = 10;
static int pause_between_cups_queue_updates = 1;
static remote_printer_t *deleted_master = NULL;
static int terminating = 0; // received SIGTERM, ignore callbacks,
// break loops
static int in_shutdown = 0;
static int autoshutdown = 0;
static int autoshutdown_avahi = 0;
static int autoshutdown_timeout = 30;
static autoshutdown_inactivity_type_t autoshutdown_on = NO_QUEUES;
static guint autoshutdown_exec_id = 0;
static const char *default_printer = NULL;
static unsigned int notify_lease_duration = 86400;
#ifdef FREQUENT_NETIF_UPDATE
static int FrequentNetifUpdate = 1;
#else
static int FrequentNetifUpdate = 0;
#endif
static int debug_stderr = 0;
static int debug_logfile = 0;
static FILE *lfp = NULL;
static char cachedir[1024];
static char logdir[1024];
static char local_default_printer_file[2048];
static char remote_default_printer_file[2048];
static char save_options_file[2048];
static char debug_log_file[2048];
static char debug_log_file_bckp[2048];
// Contains ppd keywords which are written by ppdgenerator.c in the ppd file.
static char* ppd_keywords[] =
{
"PageSize",
"PageRegion",
"InputSlot",
"MediaType",
"ColorModel",
"Duplex",
"OutputBin",
"StapleLocation",
"FoldType",
"PunchMedia",
"Booklet",
"cupsFinishingTemplate",
"cupsPrintQuality",
"print-content-optimize",
"print-rendering-intent",
"print-scaling",
};
// Static global variable for indicating we have reached the HTTP timeout
static int timeout_reached = 0;
// read-write locks
pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
pthread_rwlock_t loglock = PTHREAD_RWLOCK_INITIALIZER;
pthread_rwlock_t resolvelock = PTHREAD_RWLOCK_INITIALIZER;
pthread_rwlock_t netiflock = PTHREAD_RWLOCK_INITIALIZER;
pthread_rwlock_t update_lock = PTHREAD_RWLOCK_INITIALIZER;
static void recheck_timer (void);
static void browse_poll_create_subscription (browsepoll_t *context,
http_t *conn);
static gboolean browse_poll_get_notifications (browsepoll_t *context,
http_t *conn);
static remote_printer_t
*examine_discovered_printer_record(const char *host,
const char *ip,
uint16_t port,
char *resource,
const char *service_name,
const char *location,
const char *info,
const char *type,
const char *domain,
const char *interface,
int family,
void *txt);
static void
start_debug_logging()
{
if (debug_log_file[0] == '\0')
return;
if (lfp == NULL)
lfp = fopen(debug_log_file, "a+");
if (lfp == NULL)
{
fprintf(stderr, "cups-browsed: ERROR: Failed creating debug log file %s\n",
debug_log_file);
exit(1);
}
}
static void
stop_debug_logging()
{
debug_logfile = 0;
if (lfp)
fclose(lfp);
lfp = NULL;
}
// Returns the size of debug log file
static long int
findLogFileSize()
{
FILE* fp = fopen(debug_log_file, "r");
if (fp == NULL)
{
return (-1);
}
fseek(fp, 0L, SEEK_END);
long int res = ftell(fp);
fclose(fp);
return (res);
}
static void
copyToFile(FILE **fp1,
FILE **fp2)
{
int buffer_size = 2048;
char *buf = (char*) malloc(sizeof(char) * buffer_size);
if (!buf)
{
fprintf(stderr,"Error creating buffer for debug logging\n");
return;
}
fseek(*fp1, 0, SEEK_SET);
size_t r;
do
{
r = fread(buf, sizeof(char), buffer_size, *fp1);
fwrite(buf, sizeof(char), r, *fp2);
}
while(r == buffer_size);
free(buf);
}
static void
debug_printf(const char *format, ...)
{
pthread_rwlock_wrlock(&loglock);
if (debug_stderr || debug_logfile)
{
time_t curtime = time(NULL);
char buf[64];
ctime_r(&curtime, buf);
while(isspace(buf[strlen(buf)-1]))
buf[strlen(buf) - 1] = '\0';
va_list arglist;
if (debug_stderr)
{
va_start(arglist, format);
fprintf(stderr, "%s ", buf);
fprintf(stderr, "%ld ", pthread_self());
vfprintf(stderr, format, arglist);
fflush(stderr);
va_end(arglist);
}
if (debug_logfile && lfp)
{
va_start(arglist, format);
fprintf(lfp, "%s ", buf);
fprintf(lfp, "%ld ", pthread_self());
vfprintf(lfp, format, arglist);
fflush(lfp);
va_end(arglist);
long int log_file_size = findLogFileSize();
if (DebugLogFileSize > 0 &&
log_file_size > (long int)DebugLogFileSize * 1024)
{
fclose(lfp);
FILE *fp1 = fopen(debug_log_file, "r");
FILE *fp2 = fopen(debug_log_file_bckp, "w");
copyToFile(&fp1, &fp2);
fclose(fp1);
fclose(fp2);
lfp = fopen(debug_log_file, "w");
}
}
}
pthread_rwlock_unlock(&loglock);
}
static void
debug_log_out(char *log)
{
pthread_rwlock_wrlock(&loglock);
if (debug_stderr || debug_logfile)
{
time_t curtime = time(NULL);
char buf[64];
char *ptr1, *ptr2;
ctime_r(&curtime, buf);
while(isspace(buf[strlen(buf)-1])) buf[strlen(buf)-1] = '\0';
ptr1 = log;
while(ptr1)
{
ptr2 = strchr(ptr1, '\n');
if (ptr2) *ptr2 = '\0';
if (debug_stderr)
fprintf(stderr, "%s %s\n", buf, ptr1);
if (debug_logfile && lfp)
fprintf(lfp, "%s %s\n", buf, ptr1);
if (ptr2) *ptr2 = '\n';
ptr1 = ptr2 ? (ptr2 + 1) : NULL;
}
}
pthread_rwlock_unlock(&loglock);
}
//
// 'create_media_size()' - Create a media-size value.
//
static ipp_t * // O - media-col collection
create_media_size(int width, // I - x-dimension in 2540ths
int length) // I - y-dimension in 2540ths
{
ipp_t *media_size = ippNew(); // media-size value
ippAddInteger(media_size, IPP_TAG_PRINTER, IPP_TAG_INTEGER, "x-dimension",
width);
ippAddInteger(media_size, IPP_TAG_PRINTER, IPP_TAG_INTEGER, "y-dimension",
length);
return (media_size);
}
//
// 'create_media_range()' - Create a pagesize-range value.
//
static ipp_t *
create_media_range(int x_dim_min_width,
int x_dim_max_width,
int y_dim_min_height,
int y_dim_max_height)
{
ipp_t *media_size = ippNew();
ippAddRange(media_size, IPP_TAG_PRINTER, "x-dimension",
x_dim_min_width, x_dim_max_width);
ippAddRange(media_size, IPP_TAG_PRINTER, "y-dimension",
y_dim_min_height, y_dim_max_height);
return (media_size);
}
static void *
copy_media_size(void *size,
void *user_data)
{
media_size_t *data = (media_size_t *)size;
media_size_t *copy;
copy = (media_size_t *)calloc(1, sizeof(media_size_t));
if (copy)
{
copy->x = data->x;
copy->y = data->y;
}
return (copy);
}
static void *
copy_range_size(void *range,
void* user_data)
{
pagesize_range_t *data = (pagesize_range_t *)range;
pagesize_range_t *copy;
copy = (pagesize_range_t *)calloc(1, sizeof(pagesize_range_t));
if (copy)
{
copy->x_dim_min = data->x_dim_min;
copy->x_dim_max = data->x_dim_max;
copy->y_dim_min = data->y_dim_min;
copy->y_dim_max = data->y_dim_max;
}
return (copy);
}
static void *
copy_media(void *media,
void *user_data)
{
media_col_t *data = (media_col_t *)media;
media_col_t *copy;
copy = (media_col_t *)calloc(1, sizeof(media_col_t));
if (copy)
{
copy->x = data->x;
copy->y = data->y;
copy->left_margin=data->left_margin;
copy->right_margin=data->right_margin;
copy->top_margin=data->top_margin;
copy->bottom_margin=data->bottom_margin;
copy->media_source = NULL;
copy->media_type = NULL;
if (data->media_source != NULL)
{
copy->media_source = (char *)malloc(sizeof(char)*32);
strcpy(copy->media_source, data->media_source);
}
if (data->media_type != NULL)
{
copy->media_type = (char *)malloc(sizeof(char)*32);;
strcpy(copy->media_type, data->media_type);
}
}
return (copy);
}
//
// 'create_media_col()' - Create a media-col value.
//
static ipp_t *
create_media_col(int width,
int length,
int left_margin,
int right_margin,
int top_margin,
int bottom_margin,
char *media_source,
char *media_type)
{
ipp_t *media_col = ippNew(), // media-col value
*media_size = create_media_size(width, length);
ippAddCollection(media_col, IPP_TAG_PRINTER, "media-size", media_size);
ippAddInteger(media_col, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
"media-bottom-margin",bottom_margin);
ippAddInteger(media_col, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
"media-left-margin", left_margin);
ippAddInteger(media_col, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
"media-right-margin",right_margin);
ippAddInteger(media_col, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
"media-top-margin", top_margin);
if (media_source != NULL)
ippAddString(media_col, IPP_TAG_PRINTER, IPP_TAG_KEYWORD,
"media-source", NULL,media_source);
if (media_type != NULL)
ippAddString(media_col, IPP_TAG_PRINTER, IPP_TAG_KEYWORD,
"media-type", NULL,media_type);
ippDelete(media_size);
return (media_col);
}
static int
compare_mediasize(void *media_a, void *media_b,
void *user_data)
{
media_size_t *a = (media_size_t *)media_a;
media_size_t *b = (media_size_t *)media_b;
if (a->x < b->x)
return (-1);
else if (a->x > b->x)
return (1);
else
{
if (a->y == b->y)
return (0);
else if (a->y < b->y)
return (-1);
return (1);
}
}
static int
compare_int(int a,
int b)
{
if (a < b)
return (-1);
else if (a > b)
return (1);
return (0);
}
static int
compare_rangesize(void *range_a,void *range_b,
void *user_data)
{
pagesize_range_t *a = (pagesize_range_t *)range_a;
pagesize_range_t *b = (pagesize_range_t *)range_b;
int value;
if ((value = compare_int(a->x_dim_min, b->x_dim_min)) == 0)
{
if ((value = compare_int(a->x_dim_max, b->x_dim_max)) == 0)
{
if ((value = compare_int(a->y_dim_min, b->y_dim_min)) == 0)
{
if ((value = compare_int(a->y_dim_max, b->y_dim_max)) == 0)
return (0);
}
}
}
return (value);
}
static int
compare_media(void *media_a,
void *media_b,
void *user_data)
{
media_col_t *a = (media_col_t *)media_a;
media_col_t *b = (media_col_t *)media_b;
int value;
if ((value = compare_int(a->x, b->x)) == 0)
{
if ((value = compare_int(a->y, b->y)) == 0)
{
if ((value = compare_int(a->top_margin, b->top_margin)) == 0)
{
if ((value = compare_int(a->bottom_margin, b->bottom_margin)) == 0)
{
if ((value = compare_int(a->right_margin, b->right_margin)) == 0)
{
if ((value = compare_int(a->left_margin, b->left_margin)) == 0)
{
if (a->media_source == NULL && b->media_source == NULL)
{
if (a->media_type == NULL && b->media_type == NULL)
return (0);
if (a->media_type == NULL)
return (-1);
if (b->media_type == NULL)
return (1);
return (strcmp(a->media_type, b->media_type));
}
if (a->media_source == NULL)
return (-1);
if (b->media_source == NULL)
return (1);
if (!strcmp(a->media_source, b->media_source))
{
if (a->media_type == NULL && b->media_type == NULL)
return (0);
if (a->media_type == NULL)
return (-1);
if (b->media_type==NULL)
return (1);