]> git.ipfire.org Git - thirdparty/cups.git/blob - backend/snmp.c
projects / thirdparty / cups.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Load cups into easysw/current.
[thirdparty/cups.git] / backend / snmp.c
1 /*
2 * "$Id: snmp.c 6049 2006-10-20 15:07:21Z mike $"
3 *
4 * SNMP discovery backend for the Common UNIX Printing System (CUPS).
5 *
6 * Copyright 2006 by Easy Software Products, all rights reserved.
7 *
8 * These coded instructions, statements, and computer programs are the
9 * property of Easy Software Products and are protected by Federal
10 * copyright law. Distribution and use rights are outlined in the file
11 * "LICENSE" which should have been included with this file. If this
12 * file is missing or damaged please contact Easy Software Products
13 * at:
14 *
15 * Attn: CUPS Licensing Information
16 * Easy Software Products
17 * 44141 Airport View Drive, Suite 204
18 * Hollywood, Maryland 20636 USA
19 *
20 * Voice: (301) 373-9600
21 * EMail: cups-info@cups.org
22 * WWW: http://www.cups.org
23 *
24 * This file is subject to the Apple OS-Developed Software exception.
25 *
26 * Contents:
27 *
28 * main() - Discover printers via SNMP.
29 * add_array() - Add a string to an array.
30 * add_cache() - Add a cached device...
31 * alarm_handler() - Handle alarm signals...
32 * asn1_decode_snmp() - Decode a SNMP packet.
33 * asn1_debug() - Decode an ASN1-encoded message.
34 * asn1_encode_snmp() - Encode a SNMP packet.
35 * asn1_get_integer() - Get an integer value.
36 * asn1_get_length() - Get a value length.
37 * asn1_get_oid() - Get an OID value.
38 * asn1_get_packed() - Get a packed integer value.
39 * asn1_get_string() - Get a string value.
40 * asn1_get_type() - Get a value type.
41 * asn1_set_integer() - Set an integer value.
42 * asn1_set_length() - Set a value length.
43 * asn1_set_oid() - Set an OID value.
44 * asn1_set_packed() - Set a packed integer value.
45 * asn1_size_integer() - Figure out the number of bytes needed for an
46 * integer value.
47 * asn1_size_length() - Figure out the number of bytes needed for a
48 * length value.
49 * asn1_size_oid() - Figure out the numebr of bytes needed for an
50 * OID value.
51 * asn1_size_packed() - Figure out the number of bytes needed for a
52 * packed integer value.
53 * compare_cache() - Compare two cache entries.
54 * debug_printf() - Display some debugging information.
55 * do_request() - Do a non-blocking IPP request.
56 * fix_make_model() - Fix common problems in the make-and-model
57 * string.
58 * free_array() - Free an array of strings.
59 * free_cache() - Free the array of cached devices.
60 * get_interface_addresses() - Get the broadcast address(es) associated
61 * with an interface.
62 * hex_debug() - Output hex debugging data...
63 * list_device() - List a device we found...
64 * open_snmp_socket() - Open the SNMP broadcast socket.
65 * password_cb() - Handle authentication requests.
66 * probe_device() - Probe a device to discover whether it is a
67 * printer.
68 * read_snmp_conf() - Read the snmp.conf file.
69 * read_snmp_response() - Read and parse a SNMP response...
70 * run_time() - Return the total running time...
71 * scan_devices() - Scan for devices using SNMP.
72 * send_snmp_query() - Send an SNMP query packet.
73 * try_connect() - Try connecting on a port...
74 * update_cache() - Update a cached device...
75 */
76
77 /*
78 * Include necessary headers.
79 */
80
81 #include <cups/http-private.h>
82 #include "backend-private.h"
83 #include <cups/array.h>
84 #include <cups/file.h>
85
86
87 /*
88 * This backend implements SNMP printer discovery. It uses a broadcast-
89 * based approach to get SNMP response packets from potential printers
90 * and then interrogates each responder by trying to connect on port
91 * 631, 9100, and 515.
92 *
93 * The current focus is on printers with internal network cards, although
94 * the code also works with many external print servers as well. Future
95 * versions will support scanning for vendor-specific SNMP OIDs and the
96 * new PWG Port Monitor MIB and not just the Host MIB OIDs.
97 *
98 * The backend reads the snmp.conf file from the CUPS_SERVERROOT directory
99 * which can contain comments, blank lines, or any number of the following
100 * directives:
101 *
102 * Address ip-address
103 * Address @LOCAL
104 * Address @IF(name)
105 * Community name
106 * DebugLevel N
107 * HostNameLookups on
108 * HostNameLookups off
109 *
110 * The default is to use:
111 *
112 * Address @LOCAL
113 * Community public
114 * DebugLevel 0
115 * HostNameLookups off
116 *
117 * This backend is known to work with the following network printers and
118 * print servers:
119 *
120 * Axis OfficeBasic, 5400, 5600
121 * EPSON
122 * Genicom
123 * HP JetDirect
124 * Lexmark
125 * Sharp
126 * Tektronix
127 * Xerox
128 *
129 * It does not currently work with:
130 *
131 * DLink
132 * Linksys
133 * Netgear
134 * Okidata
135 *
136 * (for all of these, they do not support the Host MIB)
137 */
138
139 /*
140 * Constants...
141 */
142
143 #define SNMP_PORT 161 /* SNMP well-known port */
144 #define SNMP_MAX_OID 64 /* Maximum number of OID numbers */
145 #define SNMP_MAX_PACKET 1472 /* Maximum size of SNMP packet */
146 #define SNMP_MAX_STRING 512 /* Maximum size of string */
147 #define SNMP_VERSION_1 0 /* SNMPv1 */
148
149 #define ASN1_END_OF_CONTENTS 0x00 /* End-of-contents */
150 #define ASN1_BOOLEAN 0x01 /* BOOLEAN */
151 #define ASN1_INTEGER 0x02 /* INTEGER or ENUMERATION */
152 #define ASN1_BIT_STRING 0x03 /* BIT STRING */
153 #define ASN1_OCTET_STRING 0x04 /* OCTET STRING */
154 #define ASN1_NULL_VALUE 0x05 /* NULL VALUE */
155 #define ASN1_OID 0x06 /* OBJECT IDENTIFIER */
156 #define ASN1_SEQUENCE 0x30 /* SEQUENCE */
157 #define ASN1_GET_REQUEST 0xa0 /* Get-Request-PDU */
158 #define ASN1_GET_RESPONSE 0xa2 /* Get-Response-PDU */
159
160
161 /*
162 * Types...
163 */
164
165 typedef struct snmp_cache_s /**** SNMP scan cache ****/
166 {
167 http_addr_t address; /* Address of device */
168 char *addrname, /* Name of device */
169 *uri, /* device-uri */
170 *id, /* device-id */
171 *make_and_model; /* device-make-and-model */
172 } snmp_cache_t;
173
174 typedef struct snmp_packet_s /**** SNMP packet ****/
175 {
176 const char *error; /* Encode/decode error */
177 int version; /* Version number */
178 char community[SNMP_MAX_STRING];
179 /* Community name */
180 int request_type; /* Request type */
181 int request_id; /* request-id value */
182 int error_status; /* error-status value */
183 int error_index; /* error-index value */
184 int object_name[SNMP_MAX_OID];
185 /* object-name value */
186 int object_type; /* object-value type */
187 union
188 {
189 int boolean; /* Boolean value */
190 int integer; /* Integer value */
191 int oid[SNMP_MAX_OID]; /* OID value */
192 char string[SNMP_MAX_STRING];/* String value */
193 } object_value; /* object-value value */
194 } snmp_packet_t;
195
196
197 /*
198 * Private CUPS API to set the last error...
199 */
200
201 extern void _cupsSetError(ipp_status_t status, const char *message);
202
203
204 /*
205 * Local functions...
206 */
207
208 static char *add_array(cups_array_t *a, const char *s);
209 static void add_cache(http_addr_t *addr, const char *addrname,
210 const char *uri, const char *id,
211 const char *make_and_model);
212 static void alarm_handler(int sig);
213 static int asn1_decode_snmp(unsigned char *buffer, size_t len,
214 snmp_packet_t *packet);
215 static void asn1_debug(unsigned char *buffer, size_t len,
216 int indent);
217 static int asn1_encode_snmp(unsigned char *buffer, size_t len,
218 snmp_packet_t *packet);
219 static int asn1_get_integer(unsigned char **buffer,
220 unsigned char *bufend,
221 int length);
222 static int asn1_get_oid(unsigned char **buffer,
223 unsigned char *bufend,
224 int length, int *oid, int oidsize);
225 static int asn1_get_packed(unsigned char **buffer,
226 unsigned char *bufend);
227 static char *asn1_get_string(unsigned char **buffer,
228 unsigned char *bufend,
229 int length, char *string,
230 int strsize);
231 static int asn1_get_length(unsigned char **buffer,
232 unsigned char *bufend);
233 static int asn1_get_type(unsigned char **buffer,
234 unsigned char *bufend);
235 static void asn1_set_integer(unsigned char **buffer,
236 int integer);
237 static void asn1_set_length(unsigned char **buffer,
238 int length);
239 static void asn1_set_oid(unsigned char **buffer,
240 const int *oid);
241 static void asn1_set_packed(unsigned char **buffer,
242 int integer);
243 static int asn1_size_integer(int integer);
244 static int asn1_size_length(int length);
245 static int asn1_size_oid(const int *oid);
246 static int asn1_size_packed(int integer);
247 static int compare_cache(snmp_cache_t *a, snmp_cache_t *b);
248 static void debug_printf(const char *format, ...);
249 static ipp_t *do_request(http_t *http, ipp_t *request,
250 const char *resource);
251 static void fix_make_model(char *make_model,
252 const char *old_make_model,
253 int make_model_size);
254 static void free_array(cups_array_t *a);
255 static void free_cache(void);
256 static http_addrlist_t *get_interface_addresses(const char *ifname);
257 static void hex_debug(unsigned char *buffer, size_t len);
258 static void list_device(snmp_cache_t *cache);
259 static int open_snmp_socket(void);
260 static const char *password_cb(const char *prompt);
261 static void probe_device(snmp_cache_t *device);
262 static void read_snmp_conf(const char *address);
263 static void read_snmp_response(int fd);
264 static double run_time(void);
265 static void scan_devices(int fd);
266 static void send_snmp_query(int fd, http_addr_t *addr, int version,
267 const char *community,
268 const unsigned request_id,
269 const int *oid);
270 static int try_connect(http_addr_t *addr, const char *addrname,
271 int port);
272 static void update_cache(snmp_cache_t *device, const char *uri,
273 const char *id, const char *make_model);
274
275
276 /*
277 * Local globals...
278 */
279
280 static cups_array_t *Addresses = NULL;
281 static cups_array_t *Communities = NULL;
282 static cups_array_t *Devices = NULL;
283 static int DebugLevel = 0;
284 static int DeviceTypeOID[] = { 1, 3, 6, 1, 2, 1, 25, 3,
285 2, 1, 2, 1, 0 };
286 static int DeviceDescOID[] = { 1, 3, 6, 1, 2, 1, 25, 3,
287 2, 1, 3, 1, 0 };
288 static unsigned DeviceTypeRequest;
289 static unsigned DeviceDescRequest;
290 static int HostNameLookups = 0;
291 static int MaxRunTime = 10;
292 static struct timeval StartTime;
293
294
295 /*
296 * 'main()' - Discover printers via SNMP.
297 */
298
299 int /* O - Exit status */
300 main(int argc, /* I - Number of command-line arguments (6 or 7) */
301 char *argv[]) /* I - Command-line arguments */
302 {
303 int fd; /* SNMP socket */
304 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
305 struct sigaction action; /* Actions for POSIX signals */
306 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
307
308
309 /*
310 * Check command-line options...
311 */
312
313 if (argc > 2)
314 {
315 fputs("Usage: snmp [host-or-ip-address]\n", stderr);
316 return (1);
317 }
318
319 /*
320 * Set the password callback for IPP operations...
321 */
322
323 cupsSetPasswordCB(password_cb);
324
325 /*
326 * Catch SIGALRM signals...
327 */
328
329 #ifdef HAVE_SIGSET
330 sigset(SIGALRM, alarm_handler);
331 #elif defined(HAVE_SIGACTION)
332 memset(&action, 0, sizeof(action));
333
334 sigemptyset(&action.sa_mask);
335 sigaddset(&action.sa_mask, SIGALRM);
336 action.sa_handler = alarm_handler;
337 sigaction(SIGALRM, &action, NULL);
338 #else
339 signal(SIGALRM, alarm_handler);
340 #endif /* HAVE_SIGSET */
341
342 /*
343 * Open the SNMP socket...
344 */
345
346 if ((fd = open_snmp_socket()) < 0)
347 return (1);
348
349 /*
350 * Read the configuration file and any cache data...
351 */
352
353 read_snmp_conf(argv[1]);
354
355 Devices = cupsArrayNew((cups_array_func_t)compare_cache, NULL);
356
357 /*
358 * Scan for devices...
359 */
360
361 scan_devices(fd);
362
363 /*
364 * Close, free, and return with no errors...
365 */
366
367 close(fd);
368
369 free_array(Addresses);
370 free_array(Communities);
371 free_cache();
372
373 return (0);
374 }
375
376
377 /*
378 * 'add_array()' - Add a string to an array.
379 */
380
381 static char * /* O - New string */
382 add_array(cups_array_t *a, /* I - Array */
383 const char *s) /* I - String to add */
384 {
385 char *dups; /* New string */
386
387
388 dups = strdup(s);
389
390 cupsArrayAdd(a, dups);
391
392 return (dups);
393 }
394
395
396 /*
397 * 'add_cache()' - Add a cached device...
398 */
399
400 static void
401 add_cache(http_addr_t *addr, /* I - Device IP address */
402 const char *addrname, /* I - IP address or name string */
403 const char *uri, /* I - Device URI */
404 const char *id, /* I - 1284 device ID */
405 const char *make_and_model) /* I - Make and model */
406 {
407 snmp_cache_t *temp; /* New device entry */
408
409
410 debug_printf("DEBUG: add_cache(addr=%p, addrname=\"%s\", uri=\"%s\", "
411 "id=\"%s\", make_and_model=\"%s\")\n",
412 addr, addrname, uri ? uri : "(null)", id ? id : "(null)",
413 make_and_model ? make_and_model : "(null)");
414
415 temp = calloc(1, sizeof(snmp_cache_t));
416 memcpy(&(temp->address), addr, sizeof(temp->address));
417
418 temp->addrname = strdup(addrname);
419
420 if (uri)
421 temp->uri = strdup(uri);
422
423 if (id)
424 temp->id = strdup(id);
425
426 if (make_and_model)
427 temp->make_and_model = strdup(make_and_model);
428
429 cupsArrayAdd(Devices, temp);
430
431 if (uri)
432 list_device(temp);
433 }
434
435
436 /*
437 * 'alarm_handler()' - Handle alarm signals...
438 */
439
440 static void
441 alarm_handler(int sig) /* I - Signal number */
442 {
443 /*
444 * Do nothing...
445 */
446
447 (void)sig;
448
449 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
450 signal(SIGALRM, alarm_handler);
451 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
452
453 if (DebugLevel)
454 write(2, "DEBUG: ALARM!\n", 14);
455 }
456
457
458 /*
459 * 'asn1_decode_snmp()' - Decode a SNMP packet.
460 */
461
462 static int /* O - 0 on success, -1 on error */
463 asn1_decode_snmp(unsigned char *buffer, /* I - Buffer */
464 size_t len, /* I - Size of buffer */
465 snmp_packet_t *packet) /* I - SNMP packet */
466 {
467 unsigned char *bufptr, /* Pointer into the data */
468 *bufend; /* End of data */
469 int length; /* Length of value */
470
471
472 /*
473 * Initialize the decoding...
474 */
475
476 memset(packet, 0, sizeof(snmp_packet_t));
477
478 bufptr = buffer;
479 bufend = buffer + len;
480
481 if (asn1_get_type(&bufptr, bufend) != ASN1_SEQUENCE)
482 packet->error = "Packet does not start with SEQUENCE";
483 else if (asn1_get_length(&bufptr, bufend) == 0)
484 packet->error = "SEQUENCE uses indefinite length";
485 else if (asn1_get_type(&bufptr, bufend) != ASN1_INTEGER)
486 packet->error = "No version number";
487 else if ((length = asn1_get_length(&bufptr, bufend)) == 0)
488 packet->error = "Version uses indefinite length";
489 else if ((packet->version = asn1_get_integer(&bufptr, bufend, length))
490 != SNMP_VERSION_1)
491 packet->error = "Bad SNMP version number";
492 else if (asn1_get_type(&bufptr, bufend) != ASN1_OCTET_STRING)
493 packet->error = "No community name";
494 else if ((length = asn1_get_length(&bufptr, bufend)) == 0)
495 packet->error = "Community name uses indefinite length";
496 else
497 {
498 asn1_get_string(&bufptr, bufend, length, packet->community,
499 sizeof(packet->community));
500
501 if ((packet->request_type = asn1_get_type(&bufptr, bufend))
502 != ASN1_GET_RESPONSE)
503 packet->error = "Packet does not contain a Get-Response-PDU";
504 else if (asn1_get_length(&bufptr, bufend) == 0)
505 packet->error = "Get-Response-PDU uses indefinite length";
506 else if (asn1_get_type(&bufptr, bufend) != ASN1_INTEGER)
507 packet->error = "No request-id";
508 else if ((length = asn1_get_length(&bufptr, bufend)) == 0)
509 packet->error = "request-id uses indefinite length";
510 else
511 {
512 packet->request_id = asn1_get_integer(&bufptr, bufend, length);
513
514 if (asn1_get_type(&bufptr, bufend) != ASN1_INTEGER)
515 packet->error = "No error-status";
516 else if ((length = asn1_get_length(&bufptr, bufend)) == 0)
517 packet->error = "error-status uses indefinite length";
518 else
519 {
520 packet->error_status = asn1_get_integer(&bufptr, bufend, length);
521
522 if (asn1_get_type(&bufptr, bufend) != ASN1_INTEGER)
523 packet->error = "No error-index";
524 else if ((length = asn1_get_length(&bufptr, bufend)) == 0)
525 packet->error = "error-index uses indefinite length";
526 else
527 {
528 packet->error_index = asn1_get_integer(&bufptr, bufend, length);
529
530 if (asn1_get_type(&bufptr, bufend) != ASN1_SEQUENCE)
531 packet->error = "No variable-bindings SEQUENCE";
532 else if (asn1_get_length(&bufptr, bufend) == 0)
533 packet->error = "variable-bindings uses indefinite length";
534 else if (asn1_get_type(&bufptr, bufend) != ASN1_SEQUENCE)
535 packet->error = "No VarBind SEQUENCE";
536 else if (asn1_get_length(&bufptr, bufend) == 0)
537 packet->error = "VarBind uses indefinite length";
538 else if (asn1_get_type(&bufptr, bufend) != ASN1_OID)
539 packet->error = "No name OID";
540 else if ((length = asn1_get_length(&bufptr, bufend)) == 0)
541 packet->error = "Name OID uses indefinite length";
542 else
543 {
544 asn1_get_oid(&bufptr, bufend, length, packet->object_name,
545 SNMP_MAX_OID);
546
547 packet->object_type = asn1_get_type(&bufptr, bufend);
548
549 if ((length = asn1_get_length(&bufptr, bufend)) == 0 &&
550 packet->object_type != ASN1_NULL_VALUE &&
551 packet->object_type != ASN1_OCTET_STRING)
552 packet->error = "Value uses indefinite length";
553 else
554 {
555 switch (packet->object_type)
556 {
557 case ASN1_BOOLEAN :
558 packet->object_value.boolean =
559 asn1_get_integer(&bufptr, bufend, length);
560 break;
561
562 case ASN1_INTEGER :
563 packet->object_value.integer =
564 asn1_get_integer(&bufptr, bufend, length);
565 break;
566
567 case ASN1_NULL_VALUE :
568 break;
569
570 case ASN1_OCTET_STRING :
571 asn1_get_string(&bufptr, bufend, length,
572 packet->object_value.string,
573 SNMP_MAX_STRING);
574 break;
575
576 case ASN1_OID :
577 asn1_get_oid(&bufptr, bufend, length,
578 packet->object_value.oid, SNMP_MAX_OID);
579 break;
580
581 default :
582 packet->error = "Unsupported value type";
583 break;
584 }
585 }
586 }
587 }
588 }
589 }
590 }
591
592 return (packet->error ? -1 : 0);
593 }
594
595
596 /*
597 * 'asn1_debug()' - Decode an ASN1-encoded message.
598 */
599
600 static void
601 asn1_debug(unsigned char *buffer, /* I - Buffer */
602 size_t len, /* I - Length of buffer */
603 int indent) /* I - Indentation */
604 {
605 int i; /* Looping var */
606 unsigned char *bufend; /* End of buffer */
607 int integer; /* Number value */
608 int oid[SNMP_MAX_OID]; /* OID value */
609 char string[SNMP_MAX_STRING];/* String value */
610 unsigned char value_type; /* Type of value */
611 int value_length; /* Length of value */
612
613
614 bufend = buffer + len;
615
616 while (buffer < bufend)
617 {
618 /*
619 * Get value type...
620 */
621
622 value_type = asn1_get_type(&buffer, bufend);
623 value_length = asn1_get_length(&buffer, bufend);
624
625 switch (value_type)
626 {
627 case ASN1_BOOLEAN :
628 integer = asn1_get_integer(&buffer, bufend, value_length);
629
630 fprintf(stderr, "DEBUG: %*sBOOLEAN %d bytes %d\n", indent, "",
631 value_length, integer);
632 break;
633
634 case ASN1_INTEGER :
635 integer = asn1_get_integer(&buffer, bufend, value_length);
636
637 fprintf(stderr, "DEBUG: %*sINTEGER %d bytes %d\n", indent, "",
638 value_length, integer);
639 break;
640
641 case ASN1_OCTET_STRING :
642 fprintf(stderr, "DEBUG: %*sOCTET STRING %d bytes \"%s\"\n", indent, "",
643 value_length, asn1_get_string(&buffer, bufend,
644 value_length, string,
645 sizeof(string)));
646 break;
647
648 case ASN1_NULL_VALUE :
649 fprintf(stderr, "DEBUG: %*sNULL VALUE %d bytes\n", indent, "",
650 value_length);
651
652 buffer += value_length;
653 break;
654
655 case ASN1_OID :
656 asn1_get_oid(&buffer, bufend, value_length, oid, SNMP_MAX_OID);
657
658 fprintf(stderr, "DEBUG: %*sOID %d bytes ", indent, "",
659 value_length);
660 for (i = 0; oid[i]; i ++)
661 fprintf(stderr, ".%d", oid[i]);
662 putc('\n', stderr);
663 break;
664
665 case ASN1_SEQUENCE :
666 fprintf(stderr, "DEBUG: %*sSEQUENCE %d bytes\n", indent, "",
667 value_length);
668 asn1_debug(buffer, value_length, indent + 4);
669
670 buffer += value_length;
671 break;
672
673 case ASN1_GET_REQUEST :
674 fprintf(stderr, "DEBUG: %*sGet-Request-PDU %d bytes\n", indent, "",
675 value_length);
676 asn1_debug(buffer, value_length, indent + 4);
677
678 buffer += value_length;
679 break;
680
681 case ASN1_GET_RESPONSE :
682 fprintf(stderr, "DEBUG: %*sGet-Response-PDU %d bytes\n", indent, "",
683 value_length);
684 asn1_debug(buffer, value_length, indent + 4);
685
686 buffer += value_length;
687 break;
688
689 default :
690 fprintf(stderr, "DEBUG: %*sUNKNOWN(%x) %d bytes\n", indent, "",
691 value_type, value_length);
692
693 buffer += value_length;
694 break;
695 }
696 }
697 }
698
699
700 /*
701 * 'asn1_encode_snmp()' - Encode a SNMP packet.
702 */
703
704 static int /* O - Length on success, -1 on error */
705 asn1_encode_snmp(unsigned char *buffer, /* I - Buffer */
706 size_t bufsize, /* I - Size of buffer */
707 snmp_packet_t *packet) /* I - SNMP packet */
708 {
709 unsigned char *bufptr; /* Pointer into buffer */
710 int total, /* Total length */
711 msglen, /* Length of entire message */
712 commlen, /* Length of community string */
713 reqlen, /* Length of request */
714 listlen, /* Length of variable list */
715 varlen, /* Length of variable */
716 namelen, /* Length of object name OID */
717 valuelen; /* Length of object value */
718
719
720 /*
721 * Get the lengths of the community string, OID, and message...
722 */
723
724 namelen = asn1_size_oid(packet->object_name);
725
726 switch (packet->object_type)
727 {
728 case ASN1_NULL_VALUE :
729 valuelen = 0;
730 break;
731
732 case ASN1_BOOLEAN :
733 valuelen = asn1_size_integer(packet->object_value.boolean);
734 break;
735
736 case ASN1_INTEGER :
737 valuelen = asn1_size_integer(packet->object_value.integer);
738 break;
739
740 case ASN1_OCTET_STRING :
741 valuelen = strlen(packet->object_value.string);
742 break;
743
744 case ASN1_OID :
745 valuelen = asn1_size_oid(packet->object_value.oid);
746 break;
747
748 default :
749 packet->error = "Unknown object type";
750 return (-1);
751 }
752
753 varlen = 1 + asn1_size_length(namelen) + namelen +
754 1 + asn1_size_length(valuelen) + valuelen;
755 listlen = 1 + asn1_size_length(varlen) + varlen;
756 reqlen = 2 + asn1_size_integer(packet->request_id) +
757 2 + asn1_size_integer(packet->error_status) +
758 2 + asn1_size_integer(packet->error_index) +
759 1 + asn1_size_length(listlen) + listlen;
760 commlen = strlen(packet->community);
761 msglen = 2 + asn1_size_integer(packet->version) +
762 1 + asn1_size_length(commlen) + commlen +
763 1 + asn1_size_length(reqlen) + reqlen;
764 total = 1 + asn1_size_length(msglen) + msglen;
765
766 if (total > bufsize)
767 {
768 packet->error = "Message too large for buffer";
769 return (-1);
770 }
771
772 /*
773 * Then format the message...
774 */
775
776 bufptr = buffer;
777
778 *bufptr++ = ASN1_SEQUENCE; /* SNMPv1 message header */
779 asn1_set_length(&bufptr, msglen);
780
781 asn1_set_integer(&bufptr, packet->version);
782 /* version */
783
784 *bufptr++ = ASN1_OCTET_STRING; /* community */
785 asn1_set_length(&bufptr, commlen);
786 memcpy(bufptr, packet->community, commlen);
787 bufptr += commlen;
788
789 *bufptr++ = packet->request_type; /* Get-Request-PDU */
790 asn1_set_length(&bufptr, reqlen);
791
792 asn1_set_integer(&bufptr, packet->request_id);
793
794 asn1_set_integer(&bufptr, packet->error_status);
795
796 asn1_set_integer(&bufptr, packet->error_index);
797
798 *bufptr++ = ASN1_SEQUENCE; /* variable-bindings */
799 asn1_set_length(&bufptr, listlen);
800
801 *bufptr++ = ASN1_SEQUENCE; /* variable */
802 asn1_set_length(&bufptr, varlen);
803
804 asn1_set_oid(&bufptr, packet->object_name);
805 /* ObjectName */
806
807 switch (packet->object_type)
808 {
809 case ASN1_NULL_VALUE :
810 *bufptr++ = ASN1_NULL_VALUE; /* ObjectValue */
811 *bufptr++ = 0; /* Length */
812 break;
813
814 case ASN1_BOOLEAN :
815 asn1_set_integer(&bufptr, packet->object_value.boolean);
816 break;
817
818 case ASN1_INTEGER :
819 asn1_set_integer(&bufptr, packet->object_value.integer);
820 break;
821
822 case ASN1_OCTET_STRING :
823 *bufptr++ = ASN1_OCTET_STRING;
824 asn1_set_length(&bufptr, valuelen);
825 memcpy(bufptr, packet->object_value.string, valuelen);
826 bufptr += valuelen;
827 break;
828
829 case ASN1_OID :
830 asn1_set_oid(&bufptr, packet->object_value.oid);
831 break;
832 }
833
834 return (bufptr - buffer);
835 }
836
837
838 /*
839 * 'asn1_get_integer()' - Get an integer value.
840 */
841
842 static int /* O - Integer value */
843 asn1_get_integer(
844 unsigned char **buffer, /* IO - Pointer in buffer */
845 unsigned char *bufend, /* I - End of buffer */
846 int length) /* I - Length of value */
847 {
848 int value; /* Integer value */
849
850
851 for (value = 0;
852 length > 0 && *buffer < bufend;
853 length --, (*buffer) ++)
854 value = (value << 8) | **buffer;
855
856 return (value);
857 }
858
859
860 /*
861 * 'asn1_get_length()' - Get a value length.
862 */
863
864 static int /* O - Length */
865 asn1_get_length(unsigned char **buffer, /* IO - Pointer in buffer */
866 unsigned char *bufend) /* I - End of buffer */
867 {
868 int length; /* Length */
869
870
871 length = **buffer;
872 (*buffer) ++;
873
874 if (length & 128)
875 length = asn1_get_integer(buffer, bufend, length & 127);
876
877 return (length);
878 }
879
880
881 /*
882 * 'asn1_get_oid()' - Get an OID value.
883 */
884
885 static int /* O - Last OID number */
886 asn1_get_oid(
887 unsigned char **buffer, /* IO - Pointer in buffer */
888 unsigned char *bufend, /* I - End of buffer */
889 int length, /* I - Length of value */
890 int *oid, /* I - OID buffer */
891 int oidsize) /* I - Size of OID buffer */
892 {
893 unsigned char *valend; /* End of value */
894 int *oidend; /* End of OID buffer */
895 int number; /* OID number */
896
897
898 valend = *buffer + length;
899 oidend = oid + oidsize - 1;
900
901 if (valend > bufend)
902 valend = bufend;
903
904 number = asn1_get_packed(buffer, bufend);
905
906 if (number < 80)
907 {
908 *oid++ = number / 40;
909 number = number % 40;
910 *oid++ = number;
911 }
912 else
913 {
914 *oid++ = 2;
915 number -= 80;
916 *oid++ = number;
917 }
918
919 while (*buffer < valend)
920 {
921 number = asn1_get_packed(buffer, bufend);
922
923 if (oid < oidend)
924 *oid++ = number;
925 }
926
927 *oid = 0;
928
929 return (number);
930 }
931
932
933 /*
934 * 'asn1_get_packed()' - Get a packed integer value.
935 */
936
937 static int /* O - Value */
938 asn1_get_packed(
939 unsigned char **buffer, /* IO - Pointer in buffer */
940 unsigned char *bufend) /* I - End of buffer */
941 {
942 int value; /* Value */
943
944
945 value = 0;
946
947 while ((**buffer & 128) && *buffer < bufend)
948 {
949 value = (value << 7) | (**buffer & 127);
950 (*buffer) ++;
951 }
952
953 if (*buffer < bufend)
954 {
955 value = (value << 7) | **buffer;
956 (*buffer) ++;
957 }
958
959 return (value);
960 }
961
962
963 /*
964 * 'asn1_get_string()' - Get a string value.
965 */
966
967 static char * /* O - String */
968 asn1_get_string(
969 unsigned char **buffer, /* IO - Pointer in buffer */
970 unsigned char *bufend, /* I - End of buffer */
971 int length, /* I - Value length */
972 char *string, /* I - String buffer */
973 int strsize) /* I - String buffer size */
974 {
975 if (length < strsize)
976 {
977 memcpy(string, *buffer, length);
978 string[length] = '\0';
979 }
980 else
981 {
982 memcpy(string, buffer, strsize - 1);
983 string[strsize - 1] = '\0';
984 }
985
986 (*buffer) += length;
987
988 return (string);
989 }
990
991
992 /*
993 * 'asn1_get_type()' - Get a value type.
994 */
995
996 static int /* O - Type */
997 asn1_get_type(unsigned char **buffer, /* IO - Pointer in buffer */
998 unsigned char *bufend) /* I - End of buffer */
999 {
1000 int type; /* Type */
1001
1002
1003 type = **buffer;
1004 (*buffer) ++;
1005
1006 if ((type & 31) == 31)
1007 type = asn1_get_packed(buffer, bufend);
1008
1009 return (type);
1010 }
1011
1012
1013 /*
1014 * 'asn1_set_integer()' - Set an integer value.
1015 */
1016
1017 static void
1018 asn1_set_integer(unsigned char **buffer,/* IO - Pointer in buffer */
1019 int integer) /* I - Integer value */
1020 {
1021 **buffer = ASN1_INTEGER;
1022 (*buffer) ++;
1023
1024 if (integer > 0x7fffff || integer < -0x800000)
1025 {
1026 **buffer = 4;
1027 (*buffer) ++;
1028 **buffer = integer >> 24;
1029 (*buffer) ++;
1030 **buffer = integer >> 16;
1031 (*buffer) ++;
1032 **buffer = integer >> 8;
1033 (*buffer) ++;
1034 **buffer = integer;
1035 (*buffer) ++;
1036 }
1037 else if (integer > 0x7fff || integer < -0x8000)
1038 {
1039 **buffer = 3;
1040 (*buffer) ++;
1041 **buffer = integer >> 16;
1042 (*buffer) ++;
1043 **buffer = integer >> 8;
1044 (*buffer) ++;
1045 **buffer = integer;
1046 (*buffer) ++;
1047 }
1048 else if (integer > 0x7f || integer < -0x80)
1049 {
1050 **buffer = 2;
1051 (*buffer) ++;
1052 **buffer = integer >> 8;
1053 (*buffer) ++;
1054 **buffer = integer;
1055 (*buffer) ++;
1056 }
1057 else
1058 {
1059 **buffer = 1;
1060 (*buffer) ++;
1061 **buffer = integer;
1062 (*buffer) ++;
1063 }
1064 }
1065
1066
1067 /*
1068 * 'asn1_set_length()' - Set a value length.
1069 */
1070
1071 static void
1072 asn1_set_length(unsigned char **buffer, /* IO - Pointer in buffer */
1073 int length) /* I - Length value */
1074 {
1075 if (length > 255)
1076 {
1077 **buffer = 0x82; /* 2-byte length */
1078 (*buffer) ++;
1079 **buffer = length >> 8;
1080 (*buffer) ++;
1081 **buffer = length;
1082 (*buffer) ++;
1083 }
1084 else if (length > 127)
1085 {
1086 **buffer = 0x81; /* 1-byte length */
1087 (*buffer) ++;
1088 **buffer = length;
1089 (*buffer) ++;
1090 }
1091 else
1092 {
1093 **buffer = length; /* Length */
1094 (*buffer) ++;
1095 }
1096 }
1097
1098
1099 /*
1100 * 'asn1_set_oid()' - Set an OID value.
1101 */
1102
1103 static void
1104 asn1_set_oid(unsigned char **buffer, /* IO - Pointer in buffer */
1105 const int *oid) /* I - OID value */
1106 {
1107 **buffer = ASN1_OID;
1108 (*buffer) ++;
1109
1110 asn1_set_length(buffer, asn1_size_oid(oid));
1111
1112 asn1_set_packed(buffer, oid[0] * 40 + oid[1]);
1113
1114 for (oid += 2; *oid; oid ++)
1115 asn1_set_packed(buffer, *oid);
1116 }
1117
1118
1119 /*
1120 * 'asn1_set_packed()' - Set a packed integer value.
1121 */
1122
1123 static void
1124 asn1_set_packed(unsigned char **buffer, /* IO - Pointer in buffer */
1125 int integer) /* I - Integer value */
1126 {
1127 if (integer > 0xfffffff)
1128 {
1129 **buffer = (integer >> 14) & 0x7f;
1130 (*buffer) ++;
1131 }
1132
1133 if (integer > 0x1fffff)
1134 {
1135 **buffer = (integer >> 21) & 0x7f;
1136 (*buffer) ++;
1137 }
1138
1139 if (integer > 0x3fff)
1140 {
1141 **buffer = (integer >> 14) & 0x7f;
1142 (*buffer) ++;
1143 }
1144
1145 if (integer > 0x7f)
1146 {
1147 **buffer = (integer >> 7) & 0x7f;
1148 (*buffer) ++;
1149 }
1150
1151 **buffer = integer & 0x7f;
1152 (*buffer) ++;
1153 }
1154
1155 /*
1156 * 'asn1_size_integer()' - Figure out the number of bytes needed for an
1157 * integer value.
1158 */
1159
1160 static int /* O - Size in bytes */
1161 asn1_size_integer(int integer) /* I - Integer value */
1162 {
1163 if (integer > 0x7fffff || integer < -0x800000)
1164 return (4);
1165 else if (integer > 0x7fff || integer < -0x8000)
1166 return (3);
1167 else if (integer > 0x7f || integer < -0x80)
1168 return (2);
1169 else
1170 return (1);
1171 }
1172
1173
1174 /*
1175 * 'asn1_size_length()' - Figure out the number of bytes needed for a
1176 * length value.
1177 */
1178
1179 static int /* O - Size in bytes */
1180 asn1_size_length(int length) /* I - Length value */
1181 {
1182 if (length > 0xff)
1183 return (3);
1184 else if (length > 0x7f)
1185 return (2);
1186 else
1187 return (1);
1188 }
1189
1190
1191 /*
1192 * 'asn1_size_oid()' - Figure out the numebr of bytes needed for an
1193 * OID value.
1194 */
1195
1196 static int /* O - Size in bytes */
1197 asn1_size_oid(const int *oid) /* I - OID value */
1198 {
1199 int length; /* Length of value */
1200
1201
1202 for (length = asn1_size_packed(oid[0] * 40 + oid[1]), oid += 2; *oid; oid ++)
1203 length += asn1_size_packed(*oid);
1204
1205 return (length);
1206 }
1207
1208
1209 /*
1210 * 'asn1_size_packed()' - Figure out the number of bytes needed for a
1211 * packed integer value.
1212 */
1213
1214 static int /* O - Size in bytes */
1215 asn1_size_packed(int integer) /* I - Integer value */
1216 {
1217 if (integer > 0xfffffff)
1218 return (5);
1219 else if (integer > 0x1fffff)
1220 return (4);
1221 else if (integer > 0x3fff)
1222 return (3);
1223 else if (integer > 0x7f)
1224 return (2);
1225 else
1226 return (1);
1227 }
1228
1229
1230 /*
1231 * 'compare_cache()' - Compare two cache entries.
1232 */
1233
1234 static int /* O - Result of comparison */
1235 compare_cache(snmp_cache_t *a, /* I - First cache entry */
1236 snmp_cache_t *b) /* I - Second cache entry */
1237 {
1238 return (strcasecmp(a->addrname, b->addrname));
1239 }
1240
1241
1242 /*
1243 * 'debug_printf()' - Display some debugging information.
1244 */
1245
1246 static void
1247 debug_printf(const char *format, /* I - Printf-style format string */
1248 ...) /* I - Additional arguments as needed */
1249 {
1250 va_list ap; /* Pointer to arguments */
1251
1252
1253 if (!DebugLevel)
1254 return;
1255
1256 va_start(ap, format);
1257 vfprintf(stderr, format, ap);
1258 va_end(ap);
1259 }
1260
1261
1262 /*
1263 * 'do_request()' - Do a non-blocking IPP request.
1264 */
1265
1266 static ipp_t * /* O - Response data or NULL */
1267 do_request(http_t *http, /* I - HTTP connection to server */
1268 ipp_t *request, /* I - IPP request */
1269 const char *resource) /* I - HTTP resource for POST */
1270 {
1271 ipp_t *response; /* IPP response data */
1272 http_status_t status; /* Status of HTTP request */
1273 ipp_state_t state; /* State of IPP processing */
1274
1275
1276 /*
1277 * Setup the HTTP variables needed...
1278 */
1279
1280 httpClearFields(http);
1281 httpSetLength(http, ippLength(request));
1282 httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp");
1283
1284 /*
1285 * Do the POST request...
1286 */
1287
1288 debug_printf("DEBUG: %.3f POST %s...\n", run_time(), resource);
1289
1290 if (httpPost(http, resource))
1291 {
1292 if (httpReconnect(http))
1293 {
1294 _cupsSetError(IPP_DEVICE_ERROR, "Unable to reconnect");
1295 return (NULL);
1296 }
1297 else if (httpPost(http, resource))
1298 {
1299 _cupsSetError(IPP_GONE, "Unable to POST");
1300 return (NULL);
1301 }
1302 }
1303
1304 /*
1305 * Send the IPP data...
1306 */
1307
1308 request->state = IPP_IDLE;
1309 status = HTTP_CONTINUE;
1310
1311 while ((state = ippWrite(http, request)) != IPP_DATA)
1312 if (state == IPP_ERROR)
1313 {
1314 status = HTTP_ERROR;
1315 break;
1316 }
1317 else if (httpCheck(http))
1318 {
1319 if ((status = httpUpdate(http)) != HTTP_CONTINUE)
1320 break;
1321 }
1322
1323 /*
1324 * Get the server's return status...
1325 */
1326
1327 debug_printf("DEBUG: %.3f Getting response...\n", run_time());
1328
1329 while (status == HTTP_CONTINUE)
1330 if (httpWait(http, 1000))
1331 status = httpUpdate(http);
1332 else
1333 {
1334 status = HTTP_ERROR;
1335 http->error = ETIMEDOUT;
1336 }
1337
1338 if (status != HTTP_OK)
1339 {
1340 /*
1341 * Flush any error message...
1342 */
1343
1344 httpFlush(http);
1345 response = NULL;
1346 }
1347 else
1348 {
1349 /*
1350 * Read the response...
1351 */
1352
1353 response = ippNew();
1354
1355 while ((state = ippRead(http, response)) != IPP_DATA)
1356 if (state == IPP_ERROR)
1357 {
1358 /*
1359 * Delete the response...
1360 */
1361
1362 ippDelete(response);
1363 response = NULL;
1364
1365 _cupsSetError(IPP_SERVICE_UNAVAILABLE, strerror(errno));
1366 break;
1367 }
1368 }
1369
1370 /*
1371 * Delete the original request and return the response...
1372 */
1373
1374 ippDelete(request);
1375
1376 if (response)
1377 {
1378 ipp_attribute_t *attr; /* status-message attribute */
1379
1380
1381 attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
1382
1383 _cupsSetError(response->request.status.status_code,
1384 attr ? attr->values[0].string.text :
1385 ippErrorString(response->request.status.status_code));
1386 }
1387 else if (status != HTTP_OK)
1388 {
1389 switch (status)
1390 {
1391 case HTTP_NOT_FOUND :
1392 _cupsSetError(IPP_NOT_FOUND, httpStatus(status));
1393 break;
1394
1395 case HTTP_UNAUTHORIZED :
1396 _cupsSetError(IPP_NOT_AUTHORIZED, httpStatus(status));
1397 break;
1398
1399 case HTTP_FORBIDDEN :
1400 _cupsSetError(IPP_FORBIDDEN, httpStatus(status));
1401 break;
1402
1403 case HTTP_BAD_REQUEST :
1404 _cupsSetError(IPP_BAD_REQUEST, httpStatus(status));
1405 break;
1406
1407 case HTTP_REQUEST_TOO_LARGE :
1408 _cupsSetError(IPP_REQUEST_VALUE, httpStatus(status));
1409 break;
1410
1411 case HTTP_NOT_IMPLEMENTED :
1412 _cupsSetError(IPP_OPERATION_NOT_SUPPORTED, httpStatus(status));
1413 break;
1414
1415 case HTTP_NOT_SUPPORTED :
1416 _cupsSetError(IPP_VERSION_NOT_SUPPORTED, httpStatus(status));
1417 break;
1418
1419 default :
1420 _cupsSetError(IPP_SERVICE_UNAVAILABLE, httpStatus(status));
1421 break;
1422 }
1423 }
1424
1425 return (response);
1426 }
1427
1428
1429 /*
1430 * 'fix_make_model()' - Fix common problems in the make-and-model string.
1431 */
1432
1433 static void
1434 fix_make_model(
1435 char *make_model, /* I - New make-and-model string */
1436 const char *old_make_model, /* I - Old make-and-model string */
1437 int make_model_size) /* I - Size of new string buffer */
1438 {
1439 char *mmptr; /* Pointer into make-and-model string */
1440
1441
1442 /*
1443 * Fix some common problems with the make-and-model string so
1444 * that printer driver detection works better...
1445 */
1446
1447 if (!strncasecmp(old_make_model, "Hewlett-Packard", 15))
1448 {
1449 /*
1450 * Strip leading Hewlett-Packard and hp prefixes and replace
1451 * with a single HP manufacturer prefix...
1452 */
1453
1454 mmptr = (char *)old_make_model + 15;
1455
1456 while (isspace(*mmptr & 255))
1457 mmptr ++;
1458
1459 if (!strncasecmp(mmptr, "hp", 2))
1460 {
1461 mmptr += 2;
1462
1463 while (isspace(*mmptr & 255))
1464 mmptr ++;
1465 }
1466
1467 make_model[0] = 'H';
1468 make_model[1] = 'P';
1469 make_model[2] = ' ';
1470 strlcpy(make_model + 3, mmptr, make_model_size - 3);
1471 }
1472 else if (!strncasecmp(old_make_model, "deskjet", 7))
1473 snprintf(make_model, make_model_size, "HP DeskJet%s", old_make_model + 7);
1474 else if (!strncasecmp(old_make_model, "stylus_pro_", 11))
1475 snprintf(make_model, make_model_size, "EPSON Stylus Pro %s",
1476 old_make_model + 11);
1477 else
1478 strlcpy(make_model, old_make_model, make_model_size);
1479
1480 if ((mmptr = strstr(make_model, ", Inc.,")) != NULL)
1481 {
1482 /*
1483 * Strip inc. from name, e.g. "Tektronix, Inc., Phaser 560"
1484 * becomes "Tektronix Phaser 560"...
1485 */
1486
1487 _cups_strcpy(mmptr, mmptr + 7);
1488 }
1489
1490 if ((mmptr = strstr(make_model, " Network")) != NULL)
1491 {
1492 /*
1493 * Drop unnecessary informational text, e.g. "Xerox DocuPrint N2025
1494 * Network LaserJet - 2.12" becomes "Xerox DocuPrint N2025"...
1495 */
1496
1497 *mmptr = '\0';
1498 }
1499
1500 if ((mmptr = strchr(make_model, ',')) != NULL)
1501 {
1502 /*
1503 * Drop anything after a trailing comma...
1504 */
1505
1506 *mmptr = '\0';
1507 }
1508 }
1509
1510
1511 /*
1512 * 'free_array()' - Free an array of strings.
1513 */
1514
1515 static void
1516 free_array(cups_array_t *a) /* I - Array */
1517 {
1518 char *s; /* Current string */
1519
1520
1521 for (s = (char *)cupsArrayFirst(a); s; s = (char *)cupsArrayNext(a))
1522 free(s);
1523
1524 cupsArrayDelete(a);
1525 }
1526
1527
1528 /*
1529 * 'free_cache()' - Free the array of cached devices.
1530 */
1531
1532 static void
1533 free_cache(void)
1534 {
1535 snmp_cache_t *cache; /* Cached device */
1536
1537
1538 for (cache = (snmp_cache_t *)cupsArrayFirst(Devices);
1539 cache;
1540 cache = (snmp_cache_t *)cupsArrayNext(Devices))
1541 {
1542 free(cache->addrname);
1543
1544 if (cache->uri)
1545 free(cache->uri);
1546
1547 if (cache->id)
1548 free(cache->id);
1549
1550 if (cache->make_and_model)
1551 free(cache->make_and_model);
1552
1553 free(cache);
1554 }
1555
1556 cupsArrayDelete(Devices);
1557 Devices = NULL;
1558 }
1559
1560
1561 /*
1562 * 'get_interface_addresses()' - Get the broadcast address(es) associated
1563 * with an interface.
1564 */
1565
1566 static http_addrlist_t * /* O - List of addresses */
1567 get_interface_addresses(
1568 const char *ifname) /* I - Interface name */
1569 {
1570 struct ifaddrs *addrs, /* Interface address list */
1571 *addr; /* Current interface address */
1572 http_addrlist_t *first, /* First address in list */
1573 *last, /* Last address in list */
1574 *current; /* Current address */
1575
1576
1577 if (getifaddrs(&addrs) < 0)
1578 return (NULL);
1579
1580 for (addr = addrs, first = NULL, last = NULL; addr; addr = addr->ifa_next)
1581 if ((addr->ifa_flags & IFF_BROADCAST) && addr->ifa_broadaddr &&
1582 addr->ifa_broadaddr->sa_family == AF_INET &&
1583 (!ifname || !strcmp(ifname, addr->ifa_name)))
1584 {
1585 current = calloc(1, sizeof(http_addrlist_t));
1586
1587 memcpy(&(current->addr), addr->ifa_broadaddr,
1588 sizeof(struct sockaddr_in));
1589
1590 if (!last)
1591 first = current;
1592 else
1593 last->next = current;
1594
1595 last = current;
1596 }
1597
1598 freeifaddrs(addrs);
1599
1600 return (first);
1601 }
1602
1603
1604 /*
1605 * 'hex_debug()' - Output hex debugging data...
1606 */
1607
1608 static void
1609 hex_debug(unsigned char *buffer, /* I - Buffer */
1610 size_t len) /* I - Number of bytes */
1611 {
1612 int col; /* Current column */
1613
1614
1615 fputs("DEBUG: Hex dump of packet:\n", stderr);
1616
1617 for (col = 0; len > 0; col ++, buffer ++, len --)
1618 {
1619 if ((col & 15) == 0)
1620 fprintf(stderr, "DEBUG: %04X ", col);
1621
1622 fprintf(stderr, " %02X", *buffer);
1623
1624 if ((col & 15) == 15)
1625 putc('\n', stderr);
1626 }
1627
1628 if (col & 15)
1629 putc('\n', stderr);
1630 }
1631
1632
1633 /*
1634 * 'list_device()' - List a device we found...
1635 */
1636
1637 static void
1638 list_device(snmp_cache_t *cache) /* I - Cached device */
1639 {
1640 if (cache->uri)
1641 printf("network %s \"%s\" \"%s %s\" \"%s\"\n",
1642 cache->uri,
1643 cache->make_and_model ? cache->make_and_model : "Unknown",
1644 cache->make_and_model ? cache->make_and_model : "Unknown",
1645 cache->addrname, cache->id ? cache->id : "");
1646 }
1647
1648
1649 /*
1650 * 'open_snmp_socket()' - Open the SNMP broadcast socket.
1651 */
1652
1653 static int /* O - SNMP socket file descriptor */
1654 open_snmp_socket(void)
1655 {
1656 int fd; /* SNMP socket file descriptor */
1657 int val; /* Socket option value */
1658
1659
1660 /*
1661 * Create the SNMP socket...
1662 */
1663
1664 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
1665 {
1666 fprintf(stderr, "ERROR: Unable to create SNMP socket - %s\n",
1667 strerror(errno));
1668
1669 return (-1);
1670 }
1671
1672 /*
1673 * Set the "broadcast" flag...
1674 */
1675
1676 val = 1;
1677
1678 if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &val, sizeof(val)))
1679 {
1680 fprintf(stderr, "ERROR: Unable to set broadcast mode - %s\n",
1681 strerror(errno));
1682
1683 close(fd);
1684
1685 return (-1);
1686 }
1687
1688 return (fd);
1689 }
1690
1691
1692 /*
1693 * 'password_cb()' - Handle authentication requests.
1694 *
1695 * All we do right now is return NULL, indicating that no authentication
1696 * is possible.
1697 */
1698
1699 static const char * /* O - Password (NULL) */
1700 password_cb(const char *prompt) /* I - Prompt message */
1701 {
1702 (void)prompt; /* Anti-compiler-warning-code */
1703
1704 return (NULL);
1705 }
1706
1707
1708 /*
1709 * 'probe_device()' - Probe a device to discover whether it is a printer.
1710 *
1711 * TODO: Try using the Port Monitor MIB to discover the correct protocol
1712 * to use - first need a commercially-available printer that supports
1713 * it, though...
1714 */
1715
1716 static void
1717 probe_device(snmp_cache_t *device) /* I - Device */
1718 {
1719 int i, j; /* Looping vars */
1720 http_t *http; /* HTTP connection for IPP */
1721 char uri[1024]; /* Full device URI */
1722
1723
1724 /*
1725 * Try connecting via IPP first...
1726 */
1727
1728 debug_printf("DEBUG: %.3f Probing %s...\n", run_time(), device->addrname);
1729
1730 if (device->make_and_model &&
1731 (!strncasecmp(device->make_and_model, "Epson", 5) ||
1732 !strncasecmp(device->make_and_model, "Kyocera", 7) ||
1733 !strncasecmp(device->make_and_model, "Lexmark", 7) ||
1734 !strncasecmp(device->make_and_model, "Tektronix", 9) ||
1735 !strncasecmp(device->make_and_model, "Xerox", 5)))
1736 {
1737 /*
1738 * Epson, Kyocera, Lexmark, Tektronix, and Xerox printers often lock up on
1739 * IPP probes, so exclude them from the IPP connection test...
1740 */
1741
1742 http = NULL;
1743 }
1744 else
1745 {
1746 /*
1747 * Otherwise, try connecting for up to 1 second...
1748 */
1749
1750 alarm(1);
1751 http = httpConnect(device->addrname, 631);
1752 alarm(0);
1753 }
1754
1755 if (http);
1756 {
1757 /*
1758 * IPP is supported...
1759 */
1760
1761 ipp_t *request, /* IPP request */
1762 *response; /* IPP response */
1763 ipp_attribute_t *model, /* printer-make-and-model attribute */
1764 *info, /* printer-info attribute */
1765 *supported; /* printer-uri-supported attribute */
1766 char make_model[256],/* Make and model string to use */
1767 temp[256]; /* Temporary make/model string */
1768 int num_uris; /* Number of good URIs */
1769 static const char * const resources[] =
1770 { /* Common resource paths for IPP */
1771 "/ipp",
1772 "/ipp/port2",
1773 "/ipp/port3",
1774 "/EPSON_IPP_Printer",
1775 "/LPT1",
1776 "/LPT2",
1777 "/COM1",
1778 "/"
1779 };
1780
1781
1782 /*
1783 * Use non-blocking IO...
1784 */
1785
1786 httpBlocking(http, 0);
1787
1788 /*
1789 * Loop through a list of common resources that covers 99% of the
1790 * IPP-capable printers on the market today...
1791 */
1792
1793 for (i = 0, num_uris = 0;
1794 i < (int)(sizeof(resources) / sizeof(resources[0]));
1795 i ++)
1796 {
1797 /*
1798 * Stop early if we are out of time...
1799 */
1800
1801 if (MaxRunTime > 0 && run_time() >= MaxRunTime)
1802 break;
1803
1804 /*
1805 * Don't look past /ipp if we have found a working URI...
1806 */
1807
1808 if (num_uris > 0 && strncmp(resources[i], "/ipp", 4))
1809 break;
1810
1811 httpAssembleURI(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL,
1812 device->addrname, 631, resources[i]);
1813
1814 request = ippNewRequest(IPP_GET_PRINTER_ATTRIBUTES);
1815
1816 ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri",
1817 NULL, uri);
1818
1819 response = do_request(http, request, resources[i]);
1820
1821 debug_printf("DEBUG: %.3f %s %s (%s)\n", run_time(), uri,
1822 ippErrorString(cupsLastError()), cupsLastErrorString());
1823
1824 if (response && response->request.status.status_code == IPP_OK)
1825 {
1826 model = ippFindAttribute(response, "printer-make-and-model",
1827 IPP_TAG_TEXT);
1828 info = ippFindAttribute(response, "printer-info", IPP_TAG_TEXT);
1829 supported = ippFindAttribute(response, "printer-uri-supported",
1830 IPP_TAG_URI);
1831
1832 if (!supported)
1833 {
1834 fprintf(stderr, "ERROR: Missing printer-uri-supported from %s!\n",
1835 device->addrname);
1836
1837 httpClose(http);
1838 return;
1839 }
1840
1841 debug_printf("DEBUG: printer-info=\"%s\"\n",
1842 info ? info->values[0].string.text : "(null)");
1843 debug_printf("DEBUG: printer-make-and-model=\"%s\"\n",
1844 model ? model->values[0].string.text : "(null)");
1845
1846 /*
1847 * Don't advertise this port if the printer actually only supports
1848 * a more generic version...
1849 */
1850
1851 if (!strncmp(resources[i], "/ipp/", 5))
1852 {
1853 for (j = 0; j < supported->num_values; j ++)
1854 if (strstr(supported->values[j].string.text, "/ipp/"))
1855 break;
1856
1857 if (j >= supported->num_values)
1858 {
1859 ippDelete(response);
1860 break;
1861 }
1862 }
1863
1864 /*
1865 * Don't use the printer-info attribute if it does not contain the
1866 * IEEE-1284 device ID data...
1867 */
1868
1869 if (info &&
1870 (!strchr(info->values[0].string.text, ':') ||
1871 !strchr(info->values[0].string.text, ';')))
1872 info = NULL;
1873
1874 /*
1875 * Don't use the printer-make-and-model if it contains a generic
1876 * string like "Ricoh IPP Printer"...
1877 */
1878
1879 if (model && strstr(model->values[0].string.text, "IPP Printer"))
1880 model = NULL;
1881
1882 /*
1883 * If we don't have a printer-make-and-model string from the printer
1884 * but do have the 1284 device ID string, generate a make-and-model
1885 * string from the device ID info...
1886 */
1887
1888 if (model)
1889 strlcpy(temp, model->values[0].string.text, sizeof(temp));
1890 else if (info)
1891 backendGetMakeModel(info->values[0].string.text, temp, sizeof(temp));
1892 else
1893 temp[0] = '\0';
1894
1895 fix_make_model(make_model, temp, sizeof(make_model));
1896
1897 /*
1898 * Update the current device or add a new printer to the cache...
1899 */
1900
1901 if (num_uris == 0)
1902 update_cache(device, uri,
1903 info ? info->values[0].string.text : NULL,
1904 make_model[0] ? make_model : NULL);
1905 else
1906 add_cache(&(device->address), device->addrname, uri,
1907 info ? info->values[0].string.text : NULL,
1908 make_model[0] ? make_model : NULL);
1909
1910 num_uris ++;
1911 }
1912
1913 ippDelete(response);
1914
1915 if (num_uris > 0 && cupsLastError() != IPP_OK)
1916 break;
1917 }
1918
1919 httpClose(http);
1920
1921 if (num_uris > 0)
1922 return;
1923 }
1924
1925 /*
1926 * OK, now try the standard ports...
1927 */
1928
1929 if (!try_connect(&(device->address), device->addrname, 9100))
1930 {
1931 debug_printf("DEBUG: %s supports AppSocket!\n", device->addrname);
1932
1933 snprintf(uri, sizeof(uri), "socket://%s", device->addrname);
1934 update_cache(device, uri, NULL, NULL);
1935 }
1936 else if (!try_connect(&(device->address), device->addrname, 515))
1937 {
1938 debug_printf("DEBUG: %s supports LPD!\n", device->addrname);
1939
1940 snprintf(uri, sizeof(uri), "lpd://%s/", device->addrname);
1941 update_cache(device, uri, NULL, NULL);
1942 }
1943 }
1944
1945
1946 /*
1947 * 'read_snmp_conf()' - Read the snmp.conf file.
1948 */
1949
1950 static void
1951 read_snmp_conf(const char *address) /* I - Single address to probe */
1952 {
1953 cups_file_t *fp; /* File pointer */
1954 char filename[1024], /* Filename */
1955 line[1024], /* Line from file */
1956 *value; /* Value on line */
1957 int linenum; /* Line number */
1958 const char *cups_serverroot; /* CUPS_SERVERROOT env var */
1959 const char *debug; /* CUPS_DEBUG_LEVEL env var */
1960 const char *runtime; /* CUPS_MAX_RUN_TIME env var */
1961
1962
1963 /*
1964 * Initialize the global address and community lists...
1965 */
1966
1967 Addresses = cupsArrayNew(NULL, NULL);
1968 Communities = cupsArrayNew(NULL, NULL);
1969
1970 if (address)
1971 add_array(Addresses, address);
1972
1973 if ((debug = getenv("CUPS_DEBUG_LEVEL")) != NULL)
1974 DebugLevel = atoi(debug);
1975
1976 if ((runtime = getenv("CUPS_MAX_RUN_TIME")) != NULL)
1977 MaxRunTime = atoi(runtime);
1978
1979 /*
1980 * Find the snmp.conf file...
1981 */
1982
1983 if ((cups_serverroot = getenv("CUPS_SERVERROOT")) == NULL)
1984 cups_serverroot = CUPS_SERVERROOT;
1985
1986 snprintf(filename, sizeof(filename), "%s/snmp.conf", cups_serverroot);
1987
1988 if ((fp = cupsFileOpen(filename, "r")) != NULL)
1989 {
1990 /*
1991 * Read the snmp.conf file...
1992 */
1993
1994 linenum = 0;
1995
1996 while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum))
1997 {
1998 if (!value)
1999 fprintf(stderr, "ERROR: Missing value on line %d of %s!\n", linenum,
2000 filename);
2001 else if (!strcasecmp(line, "Address"))
2002 {
2003 if (!address)
2004 add_array(Addresses, value);
2005 }
2006 else if (!strcasecmp(line, "Community"))
2007 add_array(Communities, value);
2008 else if (!strcasecmp(line, "DebugLevel"))
2009 DebugLevel = atoi(value);
2010 else if (!strcasecmp(line, "HostNameLookups"))
2011 HostNameLookups = !strcasecmp(value, "on") ||
2012 !strcasecmp(value, "yes") ||
2013 !strcasecmp(value, "true") ||
2014 !strcasecmp(value, "double");
2015 else if (!strcasecmp(line, "MaxRunTime"))
2016 MaxRunTime = atoi(value);
2017 else
2018 fprintf(stderr, "ERROR: Unknown directive %s on line %d of %s!\n",
2019 line, linenum, filename);
2020 }
2021
2022 cupsFileClose(fp);
2023 }
2024
2025 /*
2026 * Use defaults if parameters are undefined...
2027 */
2028
2029 if (cupsArrayCount(Addresses) == 0)
2030 {
2031 fputs("INFO: Using default SNMP Address @LOCAL\n", stderr);
2032 add_array(Addresses, "@LOCAL");
2033 }
2034
2035 if (cupsArrayCount(Communities) == 0)
2036 {
2037 fputs("INFO: Using default SNMP Community public\n", stderr);
2038 add_array(Communities, "public");
2039 }
2040 }
2041
2042
2043 /*
2044 * 'read_snmp_response()' - Read and parse a SNMP response...
2045 */
2046
2047 static void
2048 read_snmp_response(int fd) /* I - SNMP socket file descriptor */
2049 {
2050 unsigned char buffer[SNMP_MAX_PACKET];/* Data packet */
2051 int bytes; /* Number of bytes received */
2052 http_addr_t addr; /* Source address */
2053 socklen_t addrlen; /* Source address length */
2054 char addrname[256]; /* Source address name */
2055 snmp_packet_t packet; /* Decoded packet */
2056 snmp_cache_t key, /* Search key */
2057 *device; /* Matching device */
2058
2059
2060 /*
2061 * Read the response data...
2062 */
2063
2064 addrlen = sizeof(addr);
2065
2066 if ((bytes = recvfrom(fd, buffer, sizeof(buffer), 0, (void *)&addr,
2067 &addrlen)) < 0)
2068 {
2069 fprintf(stderr, "ERROR: Unable to read data from socket: %s\n",
2070 strerror(errno));
2071 return;
2072 }
2073
2074 if (HostNameLookups)
2075 httpAddrLookup(&addr, addrname, sizeof(addrname));
2076 else
2077 httpAddrString(&addr, addrname, sizeof(addrname));
2078
2079 debug_printf("DEBUG: %.3f Received %d bytes from %s...\n", run_time(),
2080 bytes, addrname);
2081
2082 /*
2083 * Look for the response status code in the SNMP message header...
2084 */
2085
2086 if (asn1_decode_snmp(buffer, bytes, &packet))
2087 {
2088 fprintf(stderr, "ERROR: Bad SNMP packet from %s: %s\n", addrname,
2089 packet.error);
2090
2091 asn1_debug(buffer, bytes, 0);
2092 hex_debug(buffer, bytes);
2093
2094 return;
2095 }
2096
2097 debug_printf("DEBUG: community=\"%s\"\n", packet.community);
2098 debug_printf("DEBUG: request-id=%d\n", packet.request_id);
2099 debug_printf("DEBUG: error-status=%d\n", packet.error_status);
2100
2101 if (DebugLevel > 1)
2102 asn1_debug(buffer, bytes, 0);
2103
2104 if (DebugLevel > 2)
2105 hex_debug(buffer, bytes);
2106
2107 if (packet.error_status)
2108 return;
2109
2110 /*
2111 * Find a matching device in the cache...
2112 */
2113
2114 key.addrname = addrname;
2115 device = (snmp_cache_t *)cupsArrayFind(Devices, &key);
2116
2117 /*
2118 * Process the message...
2119 */
2120
2121 if (packet.request_id == DeviceTypeRequest)
2122 {
2123 /*
2124 * Got the device type response...
2125 */
2126
2127 if (device)
2128 {
2129 debug_printf("DEBUG: Discarding duplicate device type for \"%s\"...\n",
2130 addrname);
2131 return;
2132 }
2133
2134 /*
2135 * Add the device and request the device description...
2136 */
2137
2138 add_cache(&addr, addrname, NULL, NULL, NULL);
2139
2140 send_snmp_query(fd, &addr, SNMP_VERSION_1, packet.community,
2141 DeviceDescRequest, DeviceDescOID);
2142 }
2143 else if (packet.request_id == DeviceDescRequest &&
2144 packet.object_type == ASN1_OCTET_STRING)
2145 {
2146 /*
2147 * Update an existing cache entry...
2148 */
2149
2150 char make_model[256]; /* Make and model */
2151
2152
2153 if (!device)
2154 {
2155 debug_printf("DEBUG: Discarding device description for \"%s\"...\n",
2156 addrname);
2157 return;
2158 }
2159
2160 /*
2161 * Convert the description to a make and model string...
2162 */
2163
2164 if (strchr(packet.object_value.string, ':') &&
2165 strchr(packet.object_value.string, ';'))
2166 {
2167 /*
2168 * Description is the IEEE-1284 device ID...
2169 */
2170
2171 backendGetMakeModel(packet.object_value.string, make_model,
2172 sizeof(make_model));
2173 }
2174 else
2175 {
2176 /*
2177 * Description is plain text...
2178 */
2179
2180 fix_make_model(make_model, packet.object_value.string,
2181 sizeof(make_model));
2182 }
2183
2184 if (device->make_and_model)
2185 free(device->make_and_model);
2186
2187 device->make_and_model = strdup(make_model);
2188 }
2189 }
2190
2191
2192 /*
2193 * 'run_time()' - Return the total running time...
2194 */
2195
2196 static double /* O - Number of seconds */
2197 run_time(void)
2198 {
2199 struct timeval curtime; /* Current time */
2200
2201
2202 gettimeofday(&curtime, NULL);
2203
2204 return (curtime.tv_sec - StartTime.tv_sec +
2205 0.000001 * (curtime.tv_usec - StartTime.tv_usec));
2206 }
2207
2208
2209 /*
2210 * 'scan_devices()' - Scan for devices using SNMP.
2211 */
2212
2213 static void
2214 scan_devices(int fd) /* I - SNMP socket */
2215 {
2216 char *address, /* Current address */
2217 *community; /* Current community */
2218 fd_set input; /* Input set for select() */
2219 struct timeval timeout; /* Timeout for select() */
2220 time_t endtime; /* End time for scan */
2221 http_addrlist_t *addrs, /* List of addresses */
2222 *addr; /* Current address */
2223 snmp_cache_t *device; /* Current device */
2224
2225
2226 /*
2227 * Setup the request IDs...
2228 */
2229
2230 gettimeofday(&StartTime, NULL);
2231
2232 DeviceTypeRequest = StartTime.tv_sec;
2233 DeviceDescRequest = StartTime.tv_sec + 1;
2234
2235 /*
2236 * First send all of the broadcast queries...
2237 */
2238
2239 for (address = (char *)cupsArrayFirst(Addresses);
2240 address;
2241 address = (char *)cupsArrayNext(Addresses))
2242 {
2243 if (!strcmp(address, "@LOCAL"))
2244 addrs = get_interface_addresses(NULL);
2245 else if (!strncmp(address, "@IF(", 4))
2246 {
2247 char ifname[255]; /* Interface name */
2248
2249
2250 strlcpy(ifname, address + 4, sizeof(ifname));
2251 if (ifname[0])
2252 ifname[strlen(ifname) - 1] = '\0';
2253
2254 addrs = get_interface_addresses(ifname);
2255 }
2256 else
2257 addrs = httpAddrGetList(address, AF_INET, NULL);
2258
2259 if (!addrs)
2260 {
2261 fprintf(stderr, "ERROR: Unable to scan \"%s\"!\n", address);
2262 continue;
2263 }
2264
2265 for (community = (char *)cupsArrayFirst(Communities);
2266 community;
2267 community = (char *)cupsArrayNext(Communities))
2268 {
2269 debug_printf("DEBUG: Scanning for devices in \"%s\" via \"%s\"...\n",
2270 community, address);
2271
2272 for (addr = addrs; addr; addr = addr->next)
2273 send_snmp_query(fd, &(addr->addr), SNMP_VERSION_1, community,
2274 DeviceTypeRequest, DeviceTypeOID);
2275 }
2276
2277 httpAddrFreeList(addrs);
2278 }
2279
2280 /*
2281 * Then read any responses that come in over the next 3 seconds...
2282 */
2283
2284 endtime = time(NULL) + 3;
2285
2286 FD_ZERO(&input);
2287
2288 while (time(NULL) < endtime)
2289 {
2290 timeout.tv_sec = 1;
2291 timeout.tv_usec = 0;
2292
2293 FD_SET(fd, &input);
2294 if (select(fd + 1, &input, NULL, NULL, &timeout) < 0)
2295 {
2296 fprintf(stderr, "ERROR: %.3f select() for %d failed: %s\n", run_time(),
2297 fd, strerror(errno));
2298 break;
2299 }
2300
2301 if (FD_ISSET(fd, &input))
2302 read_snmp_response(fd);
2303 else
2304 break;
2305 }
2306
2307 /*
2308 * Finally, probe all of the printers we discovered to see how they are
2309 * connected...
2310 */
2311
2312 for (device = (snmp_cache_t *)cupsArrayFirst(Devices);
2313 device;
2314 device = (snmp_cache_t *)cupsArrayNext(Devices))
2315 if (MaxRunTime > 0 && run_time() >= MaxRunTime)
2316 break;
2317 else if (!device->uri)
2318 probe_device(device);
2319
2320 debug_printf("DEBUG: %.3f Scan complete!\n", run_time());
2321 }
2322
2323
2324 /*
2325 * 'send_snmp_query()' - Send an SNMP query packet.
2326 */
2327
2328 static void
2329 send_snmp_query(
2330 int fd, /* I - SNMP socket */
2331 http_addr_t *addr, /* I - Address to send to */
2332 int version, /* I - SNMP version */
2333 const char *community, /* I - Community name */
2334 const unsigned request_id, /* I - Request ID */
2335 const int *oid) /* I - OID */
2336 {
2337 int i; /* Looping var */
2338 snmp_packet_t packet; /* SNMP message packet */
2339 unsigned char buffer[SNMP_MAX_PACKET];/* SNMP message buffer */
2340 int bytes; /* Size of message */
2341 char addrname[32]; /* Address name */
2342
2343
2344 /*
2345 * Create the SNMP message...
2346 */
2347
2348 memset(&packet, 0, sizeof(packet));
2349
2350 packet.version = version;
2351 packet.request_type = ASN1_GET_REQUEST;
2352 packet.request_id = request_id;
2353 packet.object_type = ASN1_NULL_VALUE;
2354
2355 strlcpy(packet.community, community, sizeof(packet.community));
2356
2357 for (i = 0; oid[i]; i ++)
2358 packet.object_name[i] = oid[i];
2359
2360 bytes = asn1_encode_snmp(buffer, sizeof(buffer), &packet);
2361
2362 if (bytes < 0)
2363 {
2364 fprintf(stderr, "ERROR: Unable to send SNMP query: %s\n", packet.error);
2365 return;
2366 }
2367
2368 /*
2369 * Send the message...
2370 */
2371
2372 debug_printf("DEBUG: %.3f Sending %d bytes to %s...\n", run_time(),
2373 bytes, httpAddrString(addr, addrname, sizeof(addrname)));
2374 if (DebugLevel > 1)
2375 asn1_debug(buffer, bytes, 0);
2376 if (DebugLevel > 2)
2377 hex_debug(buffer, bytes);
2378
2379 addr->ipv4.sin_port = htons(SNMP_PORT);
2380
2381 if (sendto(fd, buffer, bytes, 0, (void *)addr, sizeof(addr->ipv4)) < bytes)
2382 fprintf(stderr, "ERROR: Unable to send %d bytes to %s: %s\n",
2383 bytes, addrname, strerror(errno));
2384 }
2385
2386
2387 /*
2388 * 'try_connect()' - Try connecting on a port...
2389 */
2390
2391 static int /* O - 0 on success or -1 on error */
2392 try_connect(http_addr_t *addr, /* I - Socket address */
2393 const char *addrname, /* I - Hostname or IP address */
2394 int port) /* I - Port number */
2395 {
2396 int fd; /* Socket */
2397 int status; /* Connection status */
2398
2399
2400 debug_printf("DEBUG: %.3f Trying %s://%s:%d...\n", run_time(),
2401 port == 515 ? "lpd" : "socket", addrname, port);
2402
2403 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
2404 {
2405 fprintf(stderr, "ERROR: Unable to create socket: %s\n", strerror(errno));
2406 return (-1);
2407 }
2408
2409 addr->ipv4.sin_port = htons(port);
2410
2411 alarm(1);
2412
2413 status = connect(fd, (void *)addr, httpAddrLength(addr));
2414
2415 close(fd);
2416 alarm(0);
2417
2418 return (status);
2419 }
2420
2421
2422 /*
2423 * 'update_cache()' - Update a cached device...
2424 */
2425
2426 static void
2427 update_cache(snmp_cache_t *device, /* I - Device */
2428 const char *uri, /* I - Device URI */
2429 const char *id, /* I - Device ID */
2430 const char *make_model) /* I - Device make and model */
2431 {
2432 if (device->uri)
2433 free(device->uri);
2434
2435 device->uri = strdup(uri);
2436
2437 if (id)
2438 {
2439 if (device->id)
2440 free(device->id);
2441
2442 device->id = strdup(id);
2443 }
2444
2445 if (make_model)
2446 {
2447 if (device->make_and_model)
2448 free(device->make_and_model);
2449
2450 device->make_and_model = strdup(make_model);
2451 }
2452
2453 list_device(device);
2454 }
2455
2456
2457 /*
2458 * End of "$Id: snmp.c 6049 2006-10-20 15:07:21Z mike $".
2459 */
Unnamed repository; edit this file 'description' to name the repository.