forked from OpenPrinting/cups
-
Notifications
You must be signed in to change notification settings - Fork 0
/
snmp.c
1361 lines (1066 loc) · 32.4 KB
/
snmp.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* SNMP discovery backend for CUPS.
*
* Copyright 2007-2014 by Apple Inc.
* Copyright 2006-2007 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"
* "LICENSE" which should have been included with this file. If this
* file is missing or damaged, see the license at "http://www.cups.org/".
*
* This file is subject to the Apple OS-Developed Software exception.
*/
/*
* Include necessary headers.
*/
#include "backend-private.h"
#include <cups/array.h>
#include <cups/file.h>
#include <cups/http-private.h>
#include <regex.h>
/*
* This backend implements SNMP printer discovery. It uses a broadcast-
* based approach to get SNMP response packets from potential printers,
* requesting OIDs from the Host and Port Monitor MIBs, does a URI
* lookup based on the device description string, and finally a probe of
* port 9100 (AppSocket) and 515 (LPD).
*
* The current focus is on printers with internal network cards, although
* the code also works with many external print servers as well.
*
* The backend reads the snmp.conf file from the CUPS_SERVERROOT directory
* which can contain comments, blank lines, or any number of the following
* directives:
*
* Address ip-address
* Address @LOCAL
* Address @IF(name)
* Community name
* DebugLevel N
* DeviceURI "regex pattern" uri
* HostNameLookups on
* HostNameLookups off
* MaxRunTime N
*
* The default is to use:
*
* Address @LOCAL
* Community public
* DebugLevel 0
* HostNameLookups off
* MaxRunTime 120
*
* This backend is known to work with the following network printers and
* print servers:
*
* Axis OfficeBasic, 5400, 5600
* Brother
* EPSON
* Genicom
* HP JetDirect
* Lexmark
* Sharp
* Tektronix
* Xerox
*
* It does not currently work with:
*
* DLink
* Linksys
* Netgear
* Okidata
*
* (for all of these, they do not support the Host MIB)
*/
/*
* Types...
*/
enum /**** Request IDs for each field ****/
{
DEVICE_TYPE = 1,
DEVICE_DESCRIPTION,
DEVICE_LOCATION,
DEVICE_ID,
DEVICE_URI,
DEVICE_PRODUCT
};
typedef struct device_uri_s /**** DeviceURI values ****/
{
regex_t re; /* Regular expression to match */
cups_array_t *uris; /* URIs */
} device_uri_t;
typedef struct snmp_cache_s /**** SNMP scan cache ****/
{
http_addr_t address; /* Address of device */
char *addrname, /* Name of device */
*uri, /* device-uri */
*id, /* device-id */
*info, /* device-info */
*location, /* device-location */
*make_and_model; /* device-make-and-model */
int sent; /* Has this device been listed? */
} snmp_cache_t;
/*
* Local functions...
*/
static char *add_array(cups_array_t *a, const char *s);
static void add_cache(http_addr_t *addr, const char *addrname,
const char *uri, const char *id,
const char *make_and_model);
static device_uri_t *add_device_uri(char *value);
static void alarm_handler(int sig);
static int compare_cache(snmp_cache_t *a, snmp_cache_t *b);
static void debug_printf(const char *format, ...);
static void fix_make_model(char *make_model,
const char *old_make_model,
int make_model_size);
static void free_array(cups_array_t *a);
static void free_cache(void);
static http_addrlist_t *get_interface_addresses(const char *ifname);
static void list_device(snmp_cache_t *cache);
static const char *password_cb(const char *prompt);
static void probe_device(snmp_cache_t *device);
static void read_snmp_conf(const char *address);
static void read_snmp_response(int fd);
static double run_time(void);
static void scan_devices(int ipv4, int ipv6);
static int try_connect(http_addr_t *addr, const char *addrname,
int port);
static void update_cache(snmp_cache_t *device, const char *uri,
const char *id, const char *make_model);
/*
* Local globals...
*/
static cups_array_t *Addresses = NULL;
static cups_array_t *Communities = NULL;
static cups_array_t *Devices = NULL;
static int DebugLevel = 0;
static const int DescriptionOID[] = { CUPS_OID_hrDeviceDescr, 1, -1 };
static const int LocationOID[] = { CUPS_OID_sysLocation, 0, -1 };
static const int DeviceTypeOID[] = { CUPS_OID_hrDeviceType, 1, -1 };
static const int DeviceIdOID[] = { CUPS_OID_ppmPrinterIEEE1284DeviceId, 1, -1 };
static const int UriOID[] = { CUPS_OID_ppmPortServiceNameOrURI, 1, 1, -1 };
static const int LexmarkProductOID[] = { 1,3,6,1,4,1,641,2,1,2,1,2,1,-1 };
static const int LexmarkProductOID2[] = { 1,3,6,1,4,1,674,10898,100,2,1,2,1,2,1,-1 };
static const int LexmarkDeviceIdOID[] = { 1,3,6,1,4,1,641,2,1,2,1,3,1,-1 };
static const int XeroxProductOID[] = { 1,3,6,1,4,1,128,2,1,3,1,2,0,-1 };
static cups_array_t *DeviceURIs = NULL;
static int HostNameLookups = 0;
static int MaxRunTime = 120;
static struct timeval StartTime;
/*
* 'main()' - Discover printers via SNMP.
*/
int /* O - Exit status */
main(int argc, /* I - Number of command-line arguments (6 or 7) */
char *argv[]) /* I - Command-line arguments */
{
int ipv4, /* SNMP IPv4 socket */
ipv6; /* SNMP IPv6 socket */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
/*
* Check command-line options...
*/
if (argc > 2)
{
_cupsLangPuts(stderr, _("Usage: snmp [host-or-ip-address]"));
return (1);
}
/*
* Set the password callback for IPP operations...
*/
cupsSetPasswordCB(password_cb);
/*
* Catch SIGALRM signals...
*/
#ifdef HAVE_SIGSET
sigset(SIGALRM, alarm_handler);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGALRM);
action.sa_handler = alarm_handler;
sigaction(SIGALRM, &action, NULL);
#else
signal(SIGALRM, alarm_handler);
#endif /* HAVE_SIGSET */
/*
* Open the SNMP socket...
*/
if ((ipv4 = _cupsSNMPOpen(AF_INET)) < 0)
return (1);
#ifdef AF_INET6
if ((ipv6 = _cupsSNMPOpen(AF_INET6)) < 0)
perror("DEBUG: Unable to create IPv6 socket");
#else
ipv6 = -1;
#endif /* AF_INET6 */
/*
* Read the configuration file and any cache data...
*/
read_snmp_conf(argv[1]);
_cupsSNMPSetDebug(DebugLevel);
Devices = cupsArrayNew((cups_array_func_t)compare_cache, NULL);
/*
* Scan for devices...
*/
scan_devices(ipv4, ipv6);
/*
* Close, free, and return with no errors...
*/
_cupsSNMPClose(ipv4);
if (ipv6 >= 0)
_cupsSNMPClose(ipv6);
free_array(Addresses);
free_array(Communities);
free_cache();
return (0);
}
/*
* 'add_array()' - Add a string to an array.
*/
static char * /* O - New string */
add_array(cups_array_t *a, /* I - Array */
const char *s) /* I - String to add */
{
char *dups; /* New string */
dups = strdup(s);
cupsArrayAdd(a, dups);
return (dups);
}
/*
* 'add_cache()' - Add a cached device...
*/
static void
add_cache(http_addr_t *addr, /* I - Device IP address */
const char *addrname, /* I - IP address or name string */
const char *uri, /* I - Device URI */
const char *id, /* I - 1284 device ID */
const char *make_and_model) /* I - Make and model */
{
snmp_cache_t *temp; /* New device entry */
debug_printf("DEBUG: add_cache(addr=%p, addrname=\"%s\", uri=\"%s\", "
"id=\"%s\", make_and_model=\"%s\")\n",
addr, addrname, uri ? uri : "(null)", id ? id : "(null)",
make_and_model ? make_and_model : "(null)");
temp = calloc(1, sizeof(snmp_cache_t));
memcpy(&(temp->address), addr, sizeof(temp->address));
temp->addrname = strdup(addrname);
if (uri)
temp->uri = strdup(uri);
if (id)
temp->id = strdup(id);
if (make_and_model)
temp->make_and_model = strdup(make_and_model);
cupsArrayAdd(Devices, temp);
if (uri)
list_device(temp);
}
/*
* 'add_device_uri()' - Add a device URI to the cache.
*
* The value string is modified (chopped up) as needed.
*/
static device_uri_t * /* O - Device URI */
add_device_uri(char *value) /* I - Value from snmp.conf */
{
device_uri_t *device_uri; /* Device URI */
char *start; /* Start of value */
/*
* Allocate memory as needed...
*/
if (!DeviceURIs)
DeviceURIs = cupsArrayNew(NULL, NULL);
if (!DeviceURIs)
return (NULL);
if ((device_uri = calloc(1, sizeof(device_uri_t))) == NULL)
return (NULL);
if ((device_uri->uris = cupsArrayNew(NULL, NULL)) == NULL)
{
free(device_uri);
return (NULL);
}
/*
* Scan the value string for the regular expression and URI(s)...
*/
value ++; /* Skip leading " */
for (start = value; *value && *value != '\"'; value ++)
if (*value == '\\' && value[1])
_cups_strcpy(value, value + 1);
if (!*value)
{
fputs("ERROR: Missing end quote for DeviceURI!\n", stderr);
cupsArrayDelete(device_uri->uris);
free(device_uri);
return (NULL);
}
*value++ = '\0';
if (regcomp(&(device_uri->re), start, REG_EXTENDED | REG_ICASE))
{
fputs("ERROR: Bad regular expression for DeviceURI!\n", stderr);
cupsArrayDelete(device_uri->uris);
free(device_uri);
return (NULL);
}
while (*value)
{
while (isspace(*value & 255))
value ++;
if (!*value)
break;
for (start = value; *value && !isspace(*value & 255); value ++);
if (*value)
*value++ = '\0';
cupsArrayAdd(device_uri->uris, strdup(start));
}
/*
* Add the device URI to the list and return it...
*/
cupsArrayAdd(DeviceURIs, device_uri);
return (device_uri);
}
/*
* 'alarm_handler()' - Handle alarm signals...
*/
static void
alarm_handler(int sig) /* I - Signal number */
{
/*
* Do nothing...
*/
(void)sig;
#if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
signal(SIGALRM, alarm_handler);
#endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
if (DebugLevel)
write(2, "DEBUG: ALARM!\n", 14);
}
/*
* 'compare_cache()' - Compare two cache entries.
*/
static int /* O - Result of comparison */
compare_cache(snmp_cache_t *a, /* I - First cache entry */
snmp_cache_t *b) /* I - Second cache entry */
{
return (_cups_strcasecmp(a->addrname, b->addrname));
}
/*
* 'debug_printf()' - Display some debugging information.
*/
static void
debug_printf(const char *format, /* I - Printf-style format string */
...) /* I - Additional arguments as needed */
{
va_list ap; /* Pointer to arguments */
if (!DebugLevel)
return;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
/*
* 'fix_make_model()' - Fix common problems in the make-and-model string.
*/
static void
fix_make_model(
char *make_model, /* I - New make-and-model string */
const char *old_make_model, /* I - Old make-and-model string */
int make_model_size) /* I - Size of new string buffer */
{
char *mmptr; /* Pointer into make-and-model string */
/*
* Fix some common problems with the make-and-model string so
* that printer driver detection works better...
*/
if (!_cups_strncasecmp(old_make_model, "Hewlett-Packard", 15))
{
/*
* Strip leading Hewlett-Packard and hp prefixes and replace
* with a single HP manufacturer prefix...
*/
mmptr = (char *)old_make_model + 15;
while (isspace(*mmptr & 255))
mmptr ++;
if (!_cups_strncasecmp(mmptr, "hp", 2))
{
mmptr += 2;
while (isspace(*mmptr & 255))
mmptr ++;
}
make_model[0] = 'H';
make_model[1] = 'P';
make_model[2] = ' ';
strlcpy(make_model + 3, mmptr, (size_t)make_model_size - 3);
}
else if (!_cups_strncasecmp(old_make_model, "deskjet", 7))
snprintf(make_model, (size_t)make_model_size, "HP DeskJet%s", old_make_model + 7);
else if (!_cups_strncasecmp(old_make_model, "officejet", 9))
snprintf(make_model, (size_t)make_model_size, "HP OfficeJet%s", old_make_model + 9);
else if (!_cups_strncasecmp(old_make_model, "stylus_pro_", 11))
snprintf(make_model, (size_t)make_model_size, "EPSON Stylus Pro %s", old_make_model + 11);
else
strlcpy(make_model, old_make_model, (size_t)make_model_size);
if ((mmptr = strstr(make_model, ", Inc.,")) != NULL)
{
/*
* Strip inc. from name, e.g. "Tektronix, Inc., Phaser 560"
* becomes "Tektronix Phaser 560"...
*/
_cups_strcpy(mmptr, mmptr + 7);
}
if ((mmptr = strstr(make_model, " Network")) != NULL)
{
/*
* Drop unnecessary informational text, e.g. "Xerox DocuPrint N2025
* Network LaserJet - 2.12" becomes "Xerox DocuPrint N2025"...
*/
*mmptr = '\0';
}
if ((mmptr = strchr(make_model, ',')) != NULL)
{
/*
* Drop anything after a trailing comma...
*/
*mmptr = '\0';
}
}
/*
* 'free_array()' - Free an array of strings.
*/
static void
free_array(cups_array_t *a) /* I - Array */
{
char *s; /* Current string */
for (s = (char *)cupsArrayFirst(a); s; s = (char *)cupsArrayNext(a))
free(s);
cupsArrayDelete(a);
}
/*
* 'free_cache()' - Free the array of cached devices.
*/
static void
free_cache(void)
{
snmp_cache_t *cache; /* Cached device */
for (cache = (snmp_cache_t *)cupsArrayFirst(Devices);
cache;
cache = (snmp_cache_t *)cupsArrayNext(Devices))
{
free(cache->addrname);
if (cache->uri)
free(cache->uri);
if (cache->id)
free(cache->id);
if (cache->make_and_model)
free(cache->make_and_model);
free(cache);
}
cupsArrayDelete(Devices);
Devices = NULL;
}
/*
* 'get_interface_addresses()' - Get the broadcast address(es) associated
* with an interface.
*/
static http_addrlist_t * /* O - List of addresses */
get_interface_addresses(
const char *ifname) /* I - Interface name */
{
struct ifaddrs *addrs, /* Interface address list */
*addr; /* Current interface address */
http_addrlist_t *first, /* First address in list */
*last, /* Last address in list */
*current; /* Current address */
if (getifaddrs(&addrs) < 0)
return (NULL);
for (addr = addrs, first = NULL, last = NULL; addr; addr = addr->ifa_next)
if ((addr->ifa_flags & IFF_BROADCAST) && addr->ifa_broadaddr &&
addr->ifa_broadaddr->sa_family == AF_INET &&
(!ifname || !strcmp(ifname, addr->ifa_name)))
{
current = calloc(1, sizeof(http_addrlist_t));
memcpy(&(current->addr), addr->ifa_broadaddr,
sizeof(struct sockaddr_in));
if (!last)
first = current;
else
last->next = current;
last = current;
}
freeifaddrs(addrs);
return (first);
}
/*
* 'list_device()' - List a device we found...
*/
static void
list_device(snmp_cache_t *cache) /* I - Cached device */
{
if (cache->uri)
cupsBackendReport("network", cache->uri, cache->make_and_model,
cache->info, cache->id, cache->location);
}
/*
* 'password_cb()' - Handle authentication requests.
*
* All we do right now is return NULL, indicating that no authentication
* is possible.
*/
static const char * /* O - Password (NULL) */
password_cb(const char *prompt) /* I - Prompt message */
{
(void)prompt; /* Anti-compiler-warning-code */
return (NULL);
}
/*
* 'probe_device()' - Probe a device to discover whether it is a printer.
*
* TODO: Try using the Port Monitor MIB to discover the correct protocol
* to use - first need a commercially-available printer that supports
* it, though...
*/
static void
probe_device(snmp_cache_t *device) /* I - Device */
{
char uri[1024], /* Full device URI */
*uriptr, /* Pointer into URI */
*format; /* Format string for device */
device_uri_t *device_uri; /* Current DeviceURI match */
debug_printf("DEBUG: %.3f Probing %s...\n", run_time(), device->addrname);
#ifdef __APPLE__
/*
* If the printer supports Bonjour/mDNS, don't report it from the SNMP backend.
*/
if (!try_connect(&(device->address), device->addrname, 5353))
{
debug_printf("DEBUG: %s supports mDNS, not reporting!\n", device->addrname);
return;
}
#endif /* __APPLE__ */
/*
* Lookup the device in the match table...
*/
for (device_uri = (device_uri_t *)cupsArrayFirst(DeviceURIs);
device_uri;
device_uri = (device_uri_t *)cupsArrayNext(DeviceURIs))
if (device->make_and_model &&
!regexec(&(device_uri->re), device->make_and_model, 0, NULL, 0))
{
/*
* Found a match, add the URIs...
*/
for (format = (char *)cupsArrayFirst(device_uri->uris);
format;
format = (char *)cupsArrayNext(device_uri->uris))
{
for (uriptr = uri; *format && uriptr < (uri + sizeof(uri) - 1);)
if (*format == '%' && format[1] == 's')
{
/*
* Insert hostname/address...
*/
strlcpy(uriptr, device->addrname, sizeof(uri) - (size_t)(uriptr - uri));
uriptr += strlen(uriptr);
format += 2;
}
else
*uriptr++ = *format++;
*uriptr = '\0';
update_cache(device, uri, NULL, NULL);
}
return;
}
/*
* Then try the standard ports...
*/
if (!try_connect(&(device->address), device->addrname, 9100))
{
debug_printf("DEBUG: %s supports AppSocket!\n", device->addrname);
snprintf(uri, sizeof(uri), "socket://%s", device->addrname);
update_cache(device, uri, NULL, NULL);
}
else if (!try_connect(&(device->address), device->addrname, 515))
{
debug_printf("DEBUG: %s supports LPD!\n", device->addrname);
snprintf(uri, sizeof(uri), "lpd://%s/", device->addrname);
update_cache(device, uri, NULL, NULL);
}
}
/*
* 'read_snmp_conf()' - Read the snmp.conf file.
*/
static void
read_snmp_conf(const char *address) /* I - Single address to probe */
{
cups_file_t *fp; /* File pointer */
char filename[1024], /* Filename */
line[1024], /* Line from file */
*value; /* Value on line */
int linenum; /* Line number */
const char *cups_serverroot; /* CUPS_SERVERROOT env var */
const char *debug; /* CUPS_DEBUG_LEVEL env var */
const char *runtime; /* CUPS_MAX_RUN_TIME env var */
/*
* Initialize the global address and community lists...
*/
Addresses = cupsArrayNew(NULL, NULL);
Communities = cupsArrayNew(NULL, NULL);
if (address)
add_array(Addresses, address);
if ((debug = getenv("CUPS_DEBUG_LEVEL")) != NULL)
DebugLevel = atoi(debug);
if ((runtime = getenv("CUPS_MAX_RUN_TIME")) != NULL)
MaxRunTime = atoi(runtime);
/*
* Find the snmp.conf file...
*/
if ((cups_serverroot = getenv("CUPS_SERVERROOT")) == NULL)
cups_serverroot = CUPS_SERVERROOT;
snprintf(filename, sizeof(filename), "%s/snmp.conf", cups_serverroot);
if ((fp = cupsFileOpen(filename, "r")) != NULL)
{
/*
* Read the snmp.conf file...
*/
linenum = 0;
while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum))
{
if (!value)
fprintf(stderr, "ERROR: Missing value on line %d of %s!\n", linenum,
filename);
else if (!_cups_strcasecmp(line, "Address"))
{
if (!address)
add_array(Addresses, value);
}
else if (!_cups_strcasecmp(line, "Community"))
add_array(Communities, value);
else if (!_cups_strcasecmp(line, "DebugLevel"))
DebugLevel = atoi(value);
else if (!_cups_strcasecmp(line, "DeviceURI"))
{
if (*value != '\"')
fprintf(stderr,
"ERROR: Missing double quote for regular expression on "
"line %d of %s!\n", linenum, filename);
else
add_device_uri(value);
}
else if (!_cups_strcasecmp(line, "HostNameLookups"))
HostNameLookups = !_cups_strcasecmp(value, "on") ||
!_cups_strcasecmp(value, "yes") ||
!_cups_strcasecmp(value, "true") ||
!_cups_strcasecmp(value, "double");
else if (!_cups_strcasecmp(line, "MaxRunTime"))
MaxRunTime = atoi(value);
else
fprintf(stderr, "ERROR: Unknown directive %s on line %d of %s!\n",
line, linenum, filename);
}
cupsFileClose(fp);
}
/*
* Use defaults if parameters are undefined...
*/
if (cupsArrayCount(Addresses) == 0)
{
/*
* If we have no addresses, exit immediately...
*/
fprintf(stderr,
"DEBUG: No address specified and no Address line in %s...\n",
filename);
exit(0);
}
if (cupsArrayCount(Communities) == 0)
{
fputs("INFO: Using default SNMP Community public\n", stderr);
add_array(Communities, "public");
}
}
/*
* 'read_snmp_response()' - Read and parse a SNMP response...
*/
static void
read_snmp_response(int fd) /* I - SNMP socket file descriptor */
{
char addrname[256]; /* Source address name */
cups_snmp_t packet; /* Decoded packet */
snmp_cache_t key, /* Search key */
*device; /* Matching device */
/*
* Read the response data...
*/
if (!_cupsSNMPRead(fd, &packet, -1.0))
{
fprintf(stderr, "ERROR: Unable to read data from socket: %s\n",
strerror(errno));
return;
}
if (HostNameLookups)
httpAddrLookup(&(packet.address), addrname, sizeof(addrname));
else
httpAddrString(&(packet.address), addrname, sizeof(addrname));
debug_printf("DEBUG: %.3f Received data from %s...\n", run_time(), addrname);
/*
* Look for the response status code in the SNMP message header...
*/
if (packet.error)
{
fprintf(stderr, "ERROR: Bad SNMP packet from %s: %s\n", addrname,
packet.error);
return;
}
debug_printf("DEBUG: community=\"%s\"\n", packet.community);
debug_printf("DEBUG: request-id=%d\n", packet.request_id);
debug_printf("DEBUG: error-status=%d\n", packet.error_status);
if (packet.error_status && packet.request_id != DEVICE_TYPE)
return;
/*
* Find a matching device in the cache...
*/
key.addrname = addrname;
device = (snmp_cache_t *)cupsArrayFind(Devices, &key);
/*
* Process the message...
*/
switch (packet.request_id)
{
case DEVICE_TYPE :
/*
* Got the device type response...
*/
if (device)
{
debug_printf("DEBUG: Discarding duplicate device type for \"%s\"...\n",
addrname);
return;
}
/*
* Add the device and request the device data...
*/
add_cache(&(packet.address), addrname, NULL, NULL, NULL);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_DESCRIPTION, DescriptionOID);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_ID, DeviceIdOID);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_URI, UriOID);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_LOCATION, LocationOID);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_PRODUCT, LexmarkProductOID);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_PRODUCT, LexmarkProductOID2);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_ID, LexmarkDeviceIdOID);
_cupsSNMPWrite(fd, &(packet.address), CUPS_SNMP_VERSION_1,
packet.community, CUPS_ASN1_GET_REQUEST,
DEVICE_PRODUCT, XeroxProductOID);
break;
case DEVICE_DESCRIPTION :
if (device && packet.object_type == CUPS_ASN1_OCTET_STRING)
{
/*
* Update an existing cache entry...
*/
char make_model[256]; /* Make and model */
if (strchr((char *)packet.object_value.string.bytes, ':') &&
strchr((char *)packet.object_value.string.bytes, ';'))
{
/*
* Description is the IEEE-1284 device ID...
*/
char *ptr; /* Pointer into device ID */