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Commit | Line | Data |
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91c84a35 MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
71e16022 | 4 | * SNMP functions for CUPS. |
91c84a35 | 5 | * |
88f9aafc | 6 | * Copyright 2007-2011 by Apple Inc. |
91c84a35 MS |
7 | * Copyright 2006-2007 by Easy Software Products, all rights reserved. |
8 | * | |
9 | * These coded instructions, statements, and computer programs are the | |
10 | * property of Apple Inc. and are protected by Federal copyright | |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * "LICENSE" which should have been included with this file. If this | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
14 | * | |
15 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | * | |
17 | * Contents: | |
18 | * | |
7a14d768 MS |
19 | * _cupsSNMPClose() - Close a SNMP socket. |
20 | * _cupsSNMPCopyOID() - Copy an OID. | |
21 | * _cupsSNMPDefaultCommunity() - Get the default SNMP community name. | |
22 | * _cupsSNMPIsOID() - Test whether a SNMP response contains the | |
23 | * specified OID. | |
24 | * _cupsSNMPIsOIDPrefixed() - Test whether a SNMP response uses the | |
25 | * specified OID prefix. | |
20fbc903 | 26 | * _cupsSNMPOIDToString() - Convert an OID to a string. |
7a14d768 MS |
27 | * _cupsSNMPOpen() - Open a SNMP socket. |
28 | * _cupsSNMPRead() - Read and parse a SNMP response. | |
29 | * _cupsSNMPSetDebug() - Enable/disable debug logging to stderr. | |
20fbc903 | 30 | * _cupsSNMPStringToOID() - Convert a numeric OID string to an OID array. |
7a14d768 MS |
31 | * _cupsSNMPWalk() - Enumerate a group of OIDs. |
32 | * _cupsSNMPWrite() - Send an SNMP query packet. | |
33 | * asn1_debug() - Decode an ASN1-encoded message. | |
34 | * asn1_decode_snmp() - Decode a SNMP packet. | |
35 | * asn1_encode_snmp() - Encode a SNMP packet. | |
36 | * asn1_get_integer() - Get an integer value. | |
37 | * asn1_get_length() - Get a value length. | |
38 | * asn1_get_oid() - Get an OID value. | |
39 | * asn1_get_packed() - Get a packed integer value. | |
40 | * asn1_get_string() - Get a string value. | |
41 | * asn1_get_type() - Get a value type. | |
42 | * asn1_set_integer() - Set an integer value. | |
43 | * asn1_set_length() - Set a value length. | |
44 | * asn1_set_oid() - Set an OID value. | |
45 | * asn1_set_packed() - Set a packed integer value. | |
46 | * asn1_size_integer() - Figure out the number of bytes needed for an | |
47 | * integer value. | |
48 | * asn1_size_length() - Figure out the number of bytes needed for a | |
49 | * length value. | |
50 | * asn1_size_oid() - Figure out the numebr of bytes needed for an | |
51 | * OID value. | |
52 | * asn1_size_packed() - Figure out the number of bytes needed for a | |
53 | * packed integer value. | |
54 | * snmp_set_error() - Set the localized error for a packet. | |
91c84a35 MS |
55 | */ |
56 | ||
57 | /* | |
58 | * Include necessary headers. | |
59 | */ | |
60 | ||
71e16022 | 61 | #include "cups-private.h" |
7a14d768 | 62 | #include "snmp-private.h" |
91c84a35 | 63 | #ifdef HAVE_POLL |
dcb445bc | 64 | # include <poll.h> |
91c84a35 MS |
65 | #endif /* HAVE_POLL */ |
66 | ||
67 | ||
68 | /* | |
69 | * Local functions... | |
70 | */ | |
71 | ||
91c84a35 MS |
72 | static void asn1_debug(const char *prefix, unsigned char *buffer, |
73 | size_t len, int indent); | |
ac884b6a MS |
74 | static int asn1_decode_snmp(unsigned char *buffer, size_t len, |
75 | cups_snmp_t *packet); | |
91c84a35 MS |
76 | static int asn1_encode_snmp(unsigned char *buffer, size_t len, |
77 | cups_snmp_t *packet); | |
78 | static int asn1_get_integer(unsigned char **buffer, | |
79 | unsigned char *bufend, | |
80 | int length); | |
81 | static int asn1_get_oid(unsigned char **buffer, | |
82 | unsigned char *bufend, | |
83 | int length, int *oid, int oidsize); | |
84 | static int asn1_get_packed(unsigned char **buffer, | |
85 | unsigned char *bufend); | |
86 | static char *asn1_get_string(unsigned char **buffer, | |
87 | unsigned char *bufend, | |
88 | int length, char *string, | |
89 | int strsize); | |
41681883 | 90 | static unsigned asn1_get_length(unsigned char **buffer, |
91c84a35 MS |
91 | unsigned char *bufend); |
92 | static int asn1_get_type(unsigned char **buffer, | |
93 | unsigned char *bufend); | |
94 | static void asn1_set_integer(unsigned char **buffer, | |
95 | int integer); | |
96 | static void asn1_set_length(unsigned char **buffer, | |
41681883 | 97 | unsigned length); |
91c84a35 MS |
98 | static void asn1_set_oid(unsigned char **buffer, |
99 | const int *oid); | |
100 | static void asn1_set_packed(unsigned char **buffer, | |
101 | int integer); | |
102 | static int asn1_size_integer(int integer); | |
103 | static int asn1_size_length(int length); | |
104 | static int asn1_size_oid(const int *oid); | |
105 | static int asn1_size_packed(int integer); | |
106 | static void snmp_set_error(cups_snmp_t *packet, | |
107 | const char *message); | |
108 | ||
109 | ||
110 | /* | |
7a14d768 | 111 | * '_cupsSNMPClose()' - Close a SNMP socket. |
91c84a35 MS |
112 | */ |
113 | ||
114 | void | |
7a14d768 | 115 | _cupsSNMPClose(int fd) /* I - SNMP socket file descriptor */ |
91c84a35 | 116 | { |
e07d4801 | 117 | DEBUG_printf(("4_cupsSNMPClose(fd=%d)", fd)); |
969307f0 | 118 | |
91c84a35 MS |
119 | #ifdef WIN32 |
120 | closesocket(fd); | |
121 | #else | |
122 | close(fd); | |
123 | #endif /* WIN32 */ | |
124 | } | |
125 | ||
126 | ||
127 | /* | |
7a14d768 | 128 | * '_cupsSNMPCopyOID()' - Copy an OID. |
ac884b6a MS |
129 | * |
130 | * The array pointed to by "src" is terminated by the value -1. | |
91c84a35 MS |
131 | */ |
132 | ||
133 | int * /* O - New OID */ | |
7a14d768 MS |
134 | _cupsSNMPCopyOID(int *dst, /* I - Destination OID */ |
135 | const int *src, /* I - Source OID */ | |
136 | int dstsize) /* I - Number of integers in dst */ | |
91c84a35 MS |
137 | { |
138 | int i; /* Looping var */ | |
139 | ||
140 | ||
e07d4801 | 141 | DEBUG_printf(("4_cupsSNMPCopyOID(dst=%p, src=%p, dstsize=%d)", dst, src, |
969307f0 MS |
142 | dstsize)); |
143 | ||
ac884b6a | 144 | for (i = 0, dstsize --; src[i] >= 0 && i < dstsize; i ++) |
91c84a35 MS |
145 | dst[i] = src[i]; |
146 | ||
ac884b6a | 147 | dst[i] = -1; |
91c84a35 MS |
148 | |
149 | return (dst); | |
150 | } | |
151 | ||
152 | ||
ac884b6a | 153 | /* |
7a14d768 | 154 | * '_cupsSNMPDefaultCommunity()' - Get the default SNMP community name. |
ac884b6a MS |
155 | * |
156 | * The default community name is the first community name found in the | |
157 | * snmp.conf file. If no community name is defined there, "public" is used. | |
ac884b6a MS |
158 | */ |
159 | ||
160 | const char * /* O - Default community name */ | |
7a14d768 | 161 | _cupsSNMPDefaultCommunity(void) |
ac884b6a MS |
162 | { |
163 | cups_file_t *fp; /* snmp.conf file */ | |
164 | char line[1024], /* Line from file */ | |
165 | *value; /* Value from file */ | |
166 | int linenum; /* Line number in file */ | |
167 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
168 | ||
169 | ||
e07d4801 | 170 | DEBUG_puts("4_cupsSNMPDefaultCommunity()"); |
969307f0 | 171 | |
ac884b6a MS |
172 | if (!cg->snmp_community[0]) |
173 | { | |
174 | strlcpy(cg->snmp_community, "public", sizeof(cg->snmp_community)); | |
175 | ||
176 | snprintf(line, sizeof(line), "%s/snmp.conf", cg->cups_serverroot); | |
177 | if ((fp = cupsFileOpen(line, "r")) != NULL) | |
178 | { | |
179 | linenum = 0; | |
180 | while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum)) | |
88f9aafc | 181 | if (!_cups_strcasecmp(line, "Community") && value) |
ac884b6a MS |
182 | { |
183 | strlcpy(cg->snmp_community, value, sizeof(cg->snmp_community)); | |
184 | break; | |
185 | } | |
186 | ||
187 | cupsFileClose(fp); | |
188 | } | |
189 | } | |
190 | ||
e07d4801 | 191 | DEBUG_printf(("5_cupsSNMPDefaultCommunity: Returning \"%s\"", |
969307f0 MS |
192 | cg->snmp_community)); |
193 | ||
ac884b6a MS |
194 | return (cg->snmp_community); |
195 | } | |
196 | ||
197 | ||
91c84a35 | 198 | /* |
7a14d768 | 199 | * '_cupsSNMPIsOID()' - Test whether a SNMP response contains the specified OID. |
91c84a35 | 200 | * |
ac884b6a | 201 | * The array pointed to by "oid" is terminated by the value -1. |
91c84a35 MS |
202 | */ |
203 | ||
204 | int /* O - 1 if equal, 0 if not equal */ | |
7a14d768 MS |
205 | _cupsSNMPIsOID(cups_snmp_t *packet, /* I - Response packet */ |
206 | const int *oid) /* I - OID */ | |
91c84a35 MS |
207 | { |
208 | int i; /* Looping var */ | |
209 | ||
210 | ||
211 | /* | |
212 | * Range check input... | |
213 | */ | |
214 | ||
e07d4801 | 215 | DEBUG_printf(("4_cupsSNMPIsOID(packet=%p, oid=%p)", packet, oid)); |
969307f0 | 216 | |
91c84a35 | 217 | if (!packet || !oid) |
969307f0 | 218 | { |
e07d4801 | 219 | DEBUG_puts("5_cupsSNMPIsOID: Returning 0"); |
969307f0 | 220 | |
91c84a35 | 221 | return (0); |
969307f0 | 222 | } |
91c84a35 MS |
223 | |
224 | /* | |
225 | * Compare OIDs... | |
226 | */ | |
227 | ||
ac884b6a MS |
228 | for (i = 0; |
229 | i < CUPS_SNMP_MAX_OID && oid[i] >= 0 && packet->object_name[i] >= 0; | |
230 | i ++) | |
91c84a35 | 231 | if (oid[i] != packet->object_name[i]) |
969307f0 | 232 | { |
e07d4801 | 233 | DEBUG_puts("5_cupsSNMPIsOID: Returning 0"); |
969307f0 | 234 | |
91c84a35 | 235 | return (0); |
969307f0 MS |
236 | } |
237 | ||
e07d4801 | 238 | DEBUG_printf(("5_cupsSNMPIsOID: Returning %d", |
969307f0 | 239 | i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i])); |
91c84a35 MS |
240 | |
241 | return (i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i]); | |
242 | } | |
243 | ||
244 | ||
245 | /* | |
7a14d768 MS |
246 | * '_cupsSNMPIsOIDPrefixed()' - Test whether a SNMP response uses the specified |
247 | * OID prefix. | |
91c84a35 | 248 | * |
ac884b6a | 249 | * The array pointed to by "prefix" is terminated by the value -1. |
91c84a35 MS |
250 | */ |
251 | ||
252 | int /* O - 1 if prefixed, 0 if not prefixed */ | |
7a14d768 | 253 | _cupsSNMPIsOIDPrefixed( |
91c84a35 MS |
254 | cups_snmp_t *packet, /* I - Response packet */ |
255 | const int *prefix) /* I - OID prefix */ | |
256 | { | |
257 | int i; /* Looping var */ | |
258 | ||
259 | ||
260 | /* | |
261 | * Range check input... | |
262 | */ | |
263 | ||
e07d4801 | 264 | DEBUG_printf(("4_cupsSNMPIsOIDPrefixed(packet=%p, prefix=%p)", packet, |
969307f0 MS |
265 | prefix)); |
266 | ||
91c84a35 | 267 | if (!packet || !prefix) |
969307f0 | 268 | { |
e07d4801 | 269 | DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0"); |
969307f0 | 270 | |
91c84a35 | 271 | return (0); |
969307f0 | 272 | } |
91c84a35 MS |
273 | |
274 | /* | |
275 | * Compare OIDs... | |
276 | */ | |
277 | ||
278 | for (i = 0; | |
ac884b6a | 279 | i < CUPS_SNMP_MAX_OID && prefix[i] >= 0 && packet->object_name[i] >= 0; |
91c84a35 MS |
280 | i ++) |
281 | if (prefix[i] != packet->object_name[i]) | |
969307f0 | 282 | { |
e07d4801 | 283 | DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0"); |
969307f0 | 284 | |
91c84a35 | 285 | return (0); |
969307f0 MS |
286 | } |
287 | ||
e07d4801 | 288 | DEBUG_printf(("5_cupsSNMPIsOIDPrefixed: Returning %d", |
969307f0 | 289 | i < CUPS_SNMP_MAX_OID)); |
91c84a35 MS |
290 | |
291 | return (i < CUPS_SNMP_MAX_OID); | |
292 | } | |
293 | ||
294 | ||
20fbc903 MS |
295 | /* |
296 | * '_cupsSNMPOIDToString()' - Convert an OID to a string. | |
20fbc903 MS |
297 | */ |
298 | ||
299 | ||
300 | char * /* O - New string or @code NULL@ on error */ | |
301 | _cupsSNMPOIDToString(const int *src, /* I - OID */ | |
302 | char *dst, /* I - String buffer */ | |
303 | size_t dstsize) /* I - Size of string buffer */ | |
304 | { | |
305 | char *dstptr, /* Pointer into string buffer */ | |
306 | *dstend; /* End of string buffer */ | |
307 | ||
308 | ||
e07d4801 | 309 | DEBUG_printf(("4_cupsSNMPOIDToString(src=%p, dst=%p, dstsize=" CUPS_LLFMT ")", |
20fbc903 MS |
310 | src, dst, CUPS_LLCAST dstsize)); |
311 | ||
312 | /* | |
313 | * Range check input... | |
314 | */ | |
315 | ||
316 | if (!src || !dst || dstsize < 4) | |
317 | return (NULL); | |
318 | ||
319 | /* | |
320 | * Loop through the OID array and build a string... | |
321 | */ | |
322 | ||
323 | for (dstptr = dst, dstend = dstptr + dstsize - 1; | |
324 | *src >= 0 && dstptr < dstend; | |
325 | src ++, dstptr += strlen(dstptr)) | |
326 | snprintf(dstptr, dstend - dstptr + 1, ".%d", *src); | |
327 | ||
328 | if (*src >= 0) | |
329 | return (NULL); | |
330 | else | |
331 | return (dst); | |
332 | } | |
333 | ||
334 | ||
91c84a35 | 335 | /* |
7a14d768 | 336 | * '_cupsSNMPOpen()' - Open a SNMP socket. |
91c84a35 MS |
337 | */ |
338 | ||
339 | int /* O - SNMP socket file descriptor */ | |
7a14d768 | 340 | _cupsSNMPOpen(int family) /* I - Address family - @code AF_INET@ or @code AF_INET6@ */ |
91c84a35 MS |
341 | { |
342 | int fd; /* SNMP socket file descriptor */ | |
343 | int val; /* Socket option value */ | |
344 | ||
345 | ||
346 | /* | |
347 | * Create the SNMP socket... | |
348 | */ | |
349 | ||
e07d4801 | 350 | DEBUG_printf(("4_cupsSNMPOpen(family=%d)", family)); |
969307f0 | 351 | |
ac884b6a | 352 | if ((fd = socket(family, SOCK_DGRAM, 0)) < 0) |
969307f0 | 353 | { |
e07d4801 | 354 | DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno))); |
969307f0 | 355 | |
91c84a35 | 356 | return (-1); |
969307f0 | 357 | } |
91c84a35 MS |
358 | |
359 | /* | |
360 | * Set the "broadcast" flag... | |
361 | */ | |
362 | ||
363 | val = 1; | |
364 | ||
db8b865d | 365 | if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, CUPS_SOCAST &val, sizeof(val))) |
91c84a35 | 366 | { |
e07d4801 | 367 | DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno))); |
969307f0 | 368 | |
91c84a35 MS |
369 | close(fd); |
370 | ||
371 | return (-1); | |
372 | } | |
373 | ||
e07d4801 | 374 | DEBUG_printf(("5_cupsSNMPOpen: Returning %d", fd)); |
969307f0 | 375 | |
91c84a35 MS |
376 | return (fd); |
377 | } | |
378 | ||
379 | ||
380 | /* | |
7a14d768 | 381 | * '_cupsSNMPRead()' - Read and parse a SNMP response. |
91c84a35 | 382 | * |
7a14d768 | 383 | * If "timeout" is negative, @code _cupsSNMPRead@ will wait for a response |
91c84a35 | 384 | * indefinitely. |
91c84a35 MS |
385 | */ |
386 | ||
ac884b6a | 387 | cups_snmp_t * /* O - SNMP packet or @code NULL@ if none */ |
7a14d768 | 388 | _cupsSNMPRead(int fd, /* I - SNMP socket file descriptor */ |
969307f0 MS |
389 | cups_snmp_t *packet, /* I - SNMP packet buffer */ |
390 | double timeout) /* I - Timeout in seconds */ | |
91c84a35 MS |
391 | { |
392 | unsigned char buffer[CUPS_SNMP_MAX_PACKET]; | |
393 | /* Data packet */ | |
394 | int bytes; /* Number of bytes received */ | |
395 | socklen_t addrlen; /* Source address length */ | |
ac884b6a | 396 | http_addr_t address; /* Source address */ |
91c84a35 MS |
397 | |
398 | ||
399 | /* | |
400 | * Range check input... | |
401 | */ | |
402 | ||
e07d4801 | 403 | DEBUG_printf(("4_cupsSNMPRead(fd=%d, packet=%p, timeout=%.1f)", fd, packet, |
969307f0 MS |
404 | timeout)); |
405 | ||
91c84a35 | 406 | if (fd < 0 || !packet) |
969307f0 | 407 | { |
e07d4801 | 408 | DEBUG_puts("5_cupsSNMPRead: Returning NULL"); |
969307f0 | 409 | |
91c84a35 | 410 | return (NULL); |
969307f0 | 411 | } |
91c84a35 MS |
412 | |
413 | /* | |
414 | * Optionally wait for a response... | |
415 | */ | |
416 | ||
568fa3fa | 417 | if (timeout >= 0.0) |
91c84a35 MS |
418 | { |
419 | int ready; /* Data ready on socket? */ | |
420 | #ifdef HAVE_POLL | |
421 | struct pollfd pfd; /* Polled file descriptor */ | |
422 | ||
423 | pfd.fd = fd; | |
424 | pfd.events = POLLIN; | |
425 | ||
568fa3fa | 426 | while ((ready = poll(&pfd, 1, (int)(timeout * 1000.0))) < 0 && |
e07d4801 | 427 | (errno == EINTR || errno == EAGAIN)); |
91c84a35 MS |
428 | |
429 | #else | |
430 | fd_set input_set; /* select() input set */ | |
568fa3fa | 431 | struct timeval stimeout; /* select() timeout */ |
91c84a35 MS |
432 | |
433 | do | |
434 | { | |
435 | FD_ZERO(&input_set); | |
436 | FD_SET(fd, &input_set); | |
437 | ||
568fa3fa | 438 | stimeout.tv_sec = (int)timeout; |
536bc2c6 | 439 | stimeout.tv_usec = (int)((timeout - stimeout.tv_sec) * 1000000); |
91c84a35 | 440 | |
568fa3fa | 441 | ready = select(fd + 1, &input_set, NULL, NULL, &stimeout); |
91c84a35 MS |
442 | } |
443 | # ifdef WIN32 | |
444 | while (ready < 0 && WSAGetLastError() == WSAEINTR); | |
445 | # else | |
e07d4801 | 446 | while (ready < 0 && (errno == EINTR || errno == EAGAIN)); |
91c84a35 MS |
447 | # endif /* WIN32 */ |
448 | #endif /* HAVE_POLL */ | |
449 | ||
450 | /* | |
451 | * If we don't have any data ready, return right away... | |
452 | */ | |
453 | ||
454 | if (ready <= 0) | |
969307f0 | 455 | { |
e07d4801 | 456 | DEBUG_puts("5_cupsSNMPRead: Returning NULL (timeout)"); |
969307f0 | 457 | |
91c84a35 | 458 | return (NULL); |
969307f0 | 459 | } |
91c84a35 MS |
460 | } |
461 | ||
462 | /* | |
463 | * Read the response data... | |
464 | */ | |
465 | ||
ac884b6a | 466 | addrlen = sizeof(address); |
91c84a35 | 467 | |
ac884b6a MS |
468 | if ((bytes = recvfrom(fd, buffer, sizeof(buffer), 0, (void *)&address, |
469 | &addrlen)) < 0) | |
969307f0 | 470 | { |
e07d4801 | 471 | DEBUG_printf(("5_cupsSNMPRead: Returning NULL (%s)", strerror(errno))); |
969307f0 | 472 | |
91c84a35 | 473 | return (NULL); |
969307f0 | 474 | } |
91c84a35 MS |
475 | |
476 | /* | |
477 | * Look for the response status code in the SNMP message header... | |
478 | */ | |
479 | ||
480 | asn1_debug("DEBUG: IN ", buffer, bytes, 0); | |
481 | ||
482 | asn1_decode_snmp(buffer, bytes, packet); | |
483 | ||
ac884b6a MS |
484 | memcpy(&(packet->address), &address, sizeof(packet->address)); |
485 | ||
91c84a35 MS |
486 | /* |
487 | * Return decoded data packet... | |
488 | */ | |
489 | ||
e07d4801 | 490 | DEBUG_puts("5_cupsSNMPRead: Returning packet"); |
969307f0 | 491 | |
91c84a35 MS |
492 | return (packet); |
493 | } | |
494 | ||
495 | ||
496 | /* | |
7a14d768 | 497 | * '_cupsSNMPSetDebug()' - Enable/disable debug logging to stderr. |
91c84a35 MS |
498 | */ |
499 | ||
500 | void | |
7a14d768 | 501 | _cupsSNMPSetDebug(int level) /* I - 1 to enable debug output, 0 otherwise */ |
91c84a35 MS |
502 | { |
503 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
504 | ||
505 | ||
e07d4801 | 506 | DEBUG_printf(("4_cupsSNMPSetDebug(level=%d)", level)); |
969307f0 | 507 | |
91c84a35 MS |
508 | cg->snmp_debug = level; |
509 | } | |
510 | ||
511 | ||
20fbc903 MS |
512 | /* |
513 | * '_cupsSNMPStringToOID()' - Convert a numeric OID string to an OID array. | |
514 | * | |
515 | * This function converts a string of the form ".N.N.N.N.N" to the | |
516 | * corresponding OID array terminated by -1. | |
517 | * | |
518 | * @code NULL@ is returned if the array is not large enough or the string is | |
519 | * not a valid OID number. | |
20fbc903 MS |
520 | */ |
521 | ||
522 | int * /* O - Pointer to OID array or @code NULL@ on error */ | |
523 | _cupsSNMPStringToOID(const char *src, /* I - OID string */ | |
524 | int *dst, /* I - OID array */ | |
525 | int dstsize)/* I - Number of integers in OID array */ | |
526 | { | |
527 | int *dstptr, /* Pointer into OID array */ | |
528 | *dstend; /* End of OID array */ | |
529 | ||
530 | ||
e07d4801 | 531 | DEBUG_printf(("4_cupsSNMPStringToOID(src=\"%s\", dst=%p, dstsize=%d)", |
20fbc903 MS |
532 | src, dst, dstsize)); |
533 | ||
534 | /* | |
535 | * Range check input... | |
536 | */ | |
537 | ||
538 | if (!src || !dst || dstsize < 2) | |
539 | return (NULL); | |
540 | ||
541 | /* | |
542 | * Skip leading "."... | |
543 | */ | |
544 | ||
545 | if (*src == '.') | |
546 | src ++; | |
547 | ||
548 | /* | |
549 | * Loop to the end of the string... | |
550 | */ | |
551 | ||
552 | for (dstend = dst + dstsize - 1, dstptr = dst, *dstptr = 0; | |
553 | *src && dstptr < dstend; | |
554 | src ++) | |
555 | { | |
556 | if (*src == '.') | |
557 | { | |
558 | dstptr ++; | |
559 | *dstptr = 0; | |
560 | } | |
561 | else if (isdigit(*src & 255)) | |
562 | *dstptr = *dstptr * 10 + *src - '0'; | |
563 | else | |
564 | break; | |
565 | } | |
566 | ||
567 | if (*src) | |
568 | return (NULL); | |
569 | ||
570 | /* | |
571 | * Terminate the end of the OID array and return... | |
572 | */ | |
573 | ||
574 | dstptr[1] = -1; | |
575 | ||
576 | return (dst); | |
577 | } | |
578 | ||
579 | ||
ac884b6a | 580 | /* |
7a14d768 | 581 | * '_cupsSNMPWalk()' - Enumerate a group of OIDs. |
ac884b6a MS |
582 | * |
583 | * This function queries all of the OIDs with the specified OID prefix, | |
584 | * calling the "cb" function for every response that is received. | |
585 | * | |
586 | * The array pointed to by "prefix" is terminated by the value -1. | |
587 | * | |
7a14d768 | 588 | * If "timeout" is negative, @code _cupsSNMPWalk@ will wait for a response |
568fa3fa | 589 | * indefinitely. |
ac884b6a MS |
590 | */ |
591 | ||
592 | int /* O - Number of OIDs found or -1 on error */ | |
7a14d768 MS |
593 | _cupsSNMPWalk(int fd, /* I - SNMP socket */ |
594 | http_addr_t *address, /* I - Address to query */ | |
595 | int version, /* I - SNMP version */ | |
596 | const char *community,/* I - Community name */ | |
597 | const int *prefix, /* I - OID prefix */ | |
598 | double timeout, /* I - Timeout for each response in seconds */ | |
599 | cups_snmp_cb_t cb, /* I - Function to call for each response */ | |
600 | void *data) /* I - User data pointer that is passed to the callback function */ | |
ac884b6a MS |
601 | { |
602 | int count = 0; /* Number of OIDs found */ | |
603 | int request_id = 0; /* Current request ID */ | |
604 | cups_snmp_t packet; /* Current response packet */ | |
18ecb428 MS |
605 | int lastoid[CUPS_SNMP_MAX_OID]; |
606 | /* Last OID we got */ | |
ac884b6a MS |
607 | |
608 | ||
609 | /* | |
610 | * Range check input... | |
611 | */ | |
612 | ||
e07d4801 MS |
613 | DEBUG_printf(("4_cupsSNMPWalk(fd=%d, address=%p, version=%d, " |
614 | "community=\"%s\", prefix=%p, timeout=%.1f, cb=%p, data=%p)", | |
615 | fd, address, version, community, prefix, timeout, cb, data)); | |
969307f0 | 616 | |
ac884b6a MS |
617 | if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community || |
618 | !prefix || !cb) | |
969307f0 | 619 | { |
e07d4801 | 620 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 621 | |
ac884b6a | 622 | return (-1); |
969307f0 | 623 | } |
ac884b6a MS |
624 | |
625 | /* | |
626 | * Copy the OID prefix and then loop until we have no more OIDs... | |
627 | */ | |
628 | ||
7a14d768 | 629 | _cupsSNMPCopyOID(packet.object_name, prefix, CUPS_SNMP_MAX_OID); |
18ecb428 | 630 | lastoid[0] = -1; |
ac884b6a MS |
631 | |
632 | for (;;) | |
633 | { | |
634 | request_id ++; | |
635 | ||
7a14d768 | 636 | if (!_cupsSNMPWrite(fd, address, version, community, |
18ecb428 MS |
637 | CUPS_ASN1_GET_NEXT_REQUEST, request_id, |
638 | packet.object_name)) | |
969307f0 | 639 | { |
e07d4801 | 640 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 641 | |
ac884b6a | 642 | return (-1); |
969307f0 | 643 | } |
ac884b6a | 644 | |
7a14d768 | 645 | if (!_cupsSNMPRead(fd, &packet, timeout)) |
969307f0 | 646 | { |
e07d4801 | 647 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 648 | |
ac884b6a | 649 | return (-1); |
969307f0 | 650 | } |
ac884b6a | 651 | |
18ecb428 MS |
652 | if (!_cupsSNMPIsOIDPrefixed(&packet, prefix) || |
653 | _cupsSNMPIsOID(&packet, lastoid)) | |
969307f0 | 654 | { |
e07d4801 | 655 | DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count)); |
969307f0 | 656 | |
ac884b6a | 657 | return (count); |
969307f0 | 658 | } |
ac884b6a MS |
659 | |
660 | if (packet.error || packet.error_status) | |
969307f0 | 661 | { |
e07d4801 | 662 | DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count > 0 ? count : -1)); |
969307f0 | 663 | |
ac884b6a | 664 | return (count > 0 ? count : -1); |
969307f0 | 665 | } |
ac884b6a | 666 | |
18ecb428 MS |
667 | _cupsSNMPCopyOID(lastoid, packet.object_name, CUPS_SNMP_MAX_OID); |
668 | ||
ac884b6a MS |
669 | count ++; |
670 | ||
671 | (*cb)(&packet, data); | |
672 | } | |
673 | } | |
674 | ||
675 | ||
91c84a35 | 676 | /* |
7a14d768 | 677 | * '_cupsSNMPWrite()' - Send an SNMP query packet. |
91c84a35 | 678 | * |
ac884b6a | 679 | * The array pointed to by "oid" is terminated by the value -1. |
91c84a35 MS |
680 | */ |
681 | ||
682 | int /* O - 1 on success, 0 on error */ | |
7a14d768 | 683 | _cupsSNMPWrite( |
91c84a35 MS |
684 | int fd, /* I - SNMP socket */ |
685 | http_addr_t *address, /* I - Address to send to */ | |
686 | int version, /* I - SNMP version */ | |
687 | const char *community, /* I - Community name */ | |
688 | cups_asn1_t request_type, /* I - Request type */ | |
689 | const unsigned request_id, /* I - Request ID */ | |
690 | const int *oid) /* I - OID */ | |
691 | { | |
692 | int i; /* Looping var */ | |
693 | cups_snmp_t packet; /* SNMP message packet */ | |
694 | unsigned char buffer[CUPS_SNMP_MAX_PACKET]; | |
695 | /* SNMP message buffer */ | |
696 | int bytes; /* Size of message */ | |
1ff0402e | 697 | http_addr_t temp; /* Copy of address */ |
91c84a35 MS |
698 | |
699 | ||
ac884b6a MS |
700 | /* |
701 | * Range check input... | |
702 | */ | |
703 | ||
e07d4801 MS |
704 | DEBUG_printf(("4_cupsSNMPWrite(fd=%d, address=%p, version=%d, " |
705 | "community=\"%s\", request_type=%d, request_id=%u, oid=%p)", | |
706 | fd, address, version, community, request_type, request_id, oid)); | |
969307f0 | 707 | |
ac884b6a MS |
708 | if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community || |
709 | (request_type != CUPS_ASN1_GET_REQUEST && | |
710 | request_type != CUPS_ASN1_GET_NEXT_REQUEST) || request_id < 1 || !oid) | |
969307f0 | 711 | { |
e07d4801 | 712 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (bad arguments)"); |
969307f0 | 713 | |
ac884b6a | 714 | return (0); |
969307f0 | 715 | } |
ac884b6a | 716 | |
91c84a35 MS |
717 | /* |
718 | * Create the SNMP message... | |
719 | */ | |
720 | ||
721 | memset(&packet, 0, sizeof(packet)); | |
722 | ||
723 | packet.version = version; | |
724 | packet.request_type = request_type; | |
725 | packet.request_id = request_id; | |
726 | packet.object_type = CUPS_ASN1_NULL_VALUE; | |
88f9aafc | 727 | |
91c84a35 MS |
728 | strlcpy(packet.community, community, sizeof(packet.community)); |
729 | ||
ac884b6a | 730 | for (i = 0; oid[i] >= 0 && i < (CUPS_SNMP_MAX_OID - 1); i ++) |
91c84a35 | 731 | packet.object_name[i] = oid[i]; |
ac884b6a MS |
732 | packet.object_name[i] = -1; |
733 | ||
734 | if (oid[i] >= 0) | |
735 | { | |
e07d4801 | 736 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (OID too big)"); |
969307f0 | 737 | |
ac884b6a MS |
738 | errno = E2BIG; |
739 | return (0); | |
740 | } | |
91c84a35 MS |
741 | |
742 | bytes = asn1_encode_snmp(buffer, sizeof(buffer), &packet); | |
743 | ||
744 | if (bytes < 0) | |
745 | { | |
e07d4801 | 746 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (request too big)"); |
969307f0 | 747 | |
91c84a35 | 748 | errno = E2BIG; |
91c84a35 MS |
749 | return (0); |
750 | } | |
751 | ||
752 | asn1_debug("DEBUG: OUT ", buffer, bytes, 0); | |
753 | ||
754 | /* | |
755 | * Send the message... | |
756 | */ | |
757 | ||
1ff0402e MS |
758 | temp = *address; |
759 | ||
22c9029b | 760 | _httpAddrSetPort(&temp, CUPS_SNMP_PORT); |
91c84a35 | 761 | |
1ff0402e MS |
762 | return (sendto(fd, buffer, bytes, 0, (void *)&temp, |
763 | httpAddrLength(&temp)) == bytes); | |
91c84a35 MS |
764 | } |
765 | ||
766 | ||
ac884b6a MS |
767 | /* |
768 | * 'asn1_debug()' - Decode an ASN1-encoded message. | |
769 | */ | |
770 | ||
771 | static void | |
772 | asn1_debug(const char *prefix, /* I - Prefix string */ | |
773 | unsigned char *buffer, /* I - Buffer */ | |
774 | size_t len, /* I - Length of buffer */ | |
775 | int indent) /* I - Indentation */ | |
776 | { | |
777 | int i; /* Looping var */ | |
778 | unsigned char *bufend; /* End of buffer */ | |
779 | int integer; /* Number value */ | |
780 | int oid[CUPS_SNMP_MAX_OID]; /* OID value */ | |
781 | char string[CUPS_SNMP_MAX_STRING]; | |
782 | /* String value */ | |
783 | unsigned char value_type; /* Type of value */ | |
784 | int value_length; /* Length of value */ | |
785 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
786 | ||
787 | ||
788 | if (cg->snmp_debug <= 0) | |
789 | return; | |
790 | ||
791 | if (cg->snmp_debug > 1 && indent == 0) | |
792 | { | |
793 | /* | |
794 | * Do a hex dump of the packet... | |
795 | */ | |
796 | ||
797 | int j; | |
798 | ||
799 | fprintf(stderr, "%sHex Dump (%d bytes):\n", prefix, (int)len); | |
800 | ||
536bc2c6 | 801 | for (i = 0; i < (int)len; i += 16) |
ac884b6a MS |
802 | { |
803 | fprintf(stderr, "%s%04x:", prefix, i); | |
804 | ||
536bc2c6 | 805 | for (j = 0; j < 16 && (i + j) < (int)len; j ++) |
ac884b6a MS |
806 | { |
807 | if (j && !(j & 3)) | |
808 | fprintf(stderr, " %02x", buffer[i + j]); | |
809 | else | |
810 | fprintf(stderr, " %02x", buffer[i + j]); | |
811 | } | |
812 | ||
813 | while (j < 16) | |
814 | { | |
815 | if (j && !(j & 3)) | |
816 | fputs(" ", stderr); | |
817 | else | |
818 | fputs(" ", stderr); | |
819 | ||
820 | j ++; | |
821 | } | |
822 | ||
823 | fputs(" ", stderr); | |
824 | ||
536bc2c6 | 825 | for (j = 0; j < 16 && (i + j) < (int)len; j ++) |
ac884b6a MS |
826 | if (buffer[i + j] < ' ' || buffer[i + j] >= 0x7f) |
827 | putc('.', stderr); | |
828 | else | |
829 | putc(buffer[i + j], stderr); | |
830 | ||
831 | putc('\n', stderr); | |
832 | } | |
833 | } | |
834 | ||
835 | if (indent == 0) | |
836 | fprintf(stderr, "%sMessage:\n", prefix); | |
837 | ||
838 | bufend = buffer + len; | |
839 | ||
840 | while (buffer < bufend) | |
841 | { | |
842 | /* | |
843 | * Get value type... | |
844 | */ | |
845 | ||
846 | value_type = asn1_get_type(&buffer, bufend); | |
847 | value_length = asn1_get_length(&buffer, bufend); | |
848 | ||
849 | switch (value_type) | |
850 | { | |
851 | case CUPS_ASN1_BOOLEAN : | |
852 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
853 | ||
854 | fprintf(stderr, "%s%*sBOOLEAN %d bytes %d\n", prefix, indent, "", | |
855 | value_length, integer); | |
856 | break; | |
857 | ||
858 | case CUPS_ASN1_INTEGER : | |
859 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
860 | ||
861 | fprintf(stderr, "%s%*sINTEGER %d bytes %d\n", prefix, indent, "", | |
862 | value_length, integer); | |
863 | break; | |
864 | ||
865 | case CUPS_ASN1_COUNTER : | |
866 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
867 | ||
868 | fprintf(stderr, "%s%*sCOUNTER %d bytes %u\n", prefix, indent, "", | |
869 | value_length, (unsigned)integer); | |
870 | break; | |
871 | ||
872 | case CUPS_ASN1_GAUGE : | |
873 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
874 | ||
875 | fprintf(stderr, "%s%*sGAUGE %d bytes %u\n", prefix, indent, "", | |
876 | value_length, (unsigned)integer); | |
877 | break; | |
878 | ||
879 | case CUPS_ASN1_TIMETICKS : | |
880 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
881 | ||
882 | fprintf(stderr, "%s%*sTIMETICKS %d bytes %u\n", prefix, indent, "", | |
883 | value_length, (unsigned)integer); | |
884 | break; | |
885 | ||
886 | case CUPS_ASN1_OCTET_STRING : | |
887 | fprintf(stderr, "%s%*sOCTET STRING %d bytes \"%s\"\n", prefix, | |
888 | indent, "", value_length, | |
889 | asn1_get_string(&buffer, bufend, value_length, string, | |
890 | sizeof(string))); | |
891 | break; | |
892 | ||
893 | case CUPS_ASN1_HEX_STRING : | |
894 | asn1_get_string(&buffer, bufend, value_length, string, | |
895 | sizeof(string)); | |
896 | fprintf(stderr, "%s%*sHex-STRING %d bytes", prefix, | |
897 | indent, "", value_length); | |
898 | for (i = 0; i < value_length; i ++) | |
899 | fprintf(stderr, " %02X", string[i] & 255); | |
900 | putc('\n', stderr); | |
901 | break; | |
902 | ||
903 | case CUPS_ASN1_NULL_VALUE : | |
904 | fprintf(stderr, "%s%*sNULL VALUE %d bytes\n", prefix, indent, "", | |
905 | value_length); | |
906 | ||
907 | buffer += value_length; | |
908 | break; | |
909 | ||
910 | case CUPS_ASN1_OID : | |
911 | integer = asn1_get_oid(&buffer, bufend, value_length, oid, | |
912 | CUPS_SNMP_MAX_OID); | |
913 | ||
914 | fprintf(stderr, "%s%*sOID %d bytes ", prefix, indent, "", | |
915 | value_length); | |
916 | for (i = 0; i < integer; i ++) | |
917 | fprintf(stderr, ".%d", oid[i]); | |
918 | putc('\n', stderr); | |
919 | break; | |
920 | ||
921 | case CUPS_ASN1_SEQUENCE : | |
922 | fprintf(stderr, "%s%*sSEQUENCE %d bytes\n", prefix, indent, "", | |
923 | value_length); | |
924 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
925 | ||
926 | buffer += value_length; | |
927 | break; | |
928 | ||
929 | case CUPS_ASN1_GET_NEXT_REQUEST : | |
930 | fprintf(stderr, "%s%*sGet-Next-Request-PDU %d bytes\n", prefix, | |
931 | indent, "", value_length); | |
932 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
933 | ||
934 | buffer += value_length; | |
935 | break; | |
936 | ||
937 | case CUPS_ASN1_GET_REQUEST : | |
938 | fprintf(stderr, "%s%*sGet-Request-PDU %d bytes\n", prefix, indent, "", | |
939 | value_length); | |
940 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
941 | ||
942 | buffer += value_length; | |
943 | break; | |
944 | ||
945 | case CUPS_ASN1_GET_RESPONSE : | |
946 | fprintf(stderr, "%s%*sGet-Response-PDU %d bytes\n", prefix, indent, | |
947 | "", value_length); | |
948 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
949 | ||
950 | buffer += value_length; | |
951 | break; | |
952 | ||
953 | default : | |
954 | fprintf(stderr, "%s%*sUNKNOWN(%x) %d bytes\n", prefix, indent, "", | |
955 | value_type, value_length); | |
956 | ||
957 | buffer += value_length; | |
958 | break; | |
959 | } | |
960 | } | |
961 | } | |
88f9aafc | 962 | |
ac884b6a | 963 | |
91c84a35 MS |
964 | /* |
965 | * 'asn1_decode_snmp()' - Decode a SNMP packet. | |
966 | */ | |
967 | ||
968 | static int /* O - 0 on success, -1 on error */ | |
969 | asn1_decode_snmp(unsigned char *buffer, /* I - Buffer */ | |
970 | size_t len, /* I - Size of buffer */ | |
971 | cups_snmp_t *packet) /* I - SNMP packet */ | |
972 | { | |
973 | unsigned char *bufptr, /* Pointer into the data */ | |
974 | *bufend; /* End of data */ | |
975 | int length; /* Length of value */ | |
976 | ||
977 | ||
978 | /* | |
979 | * Initialize the decoding... | |
980 | */ | |
981 | ||
982 | memset(packet, 0, sizeof(cups_snmp_t)); | |
ac884b6a | 983 | packet->object_name[0] = -1; |
91c84a35 MS |
984 | |
985 | bufptr = buffer; | |
986 | bufend = buffer + len; | |
987 | ||
988 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
989 | snmp_set_error(packet, _("Packet does not start with SEQUENCE")); | |
990 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
991 | snmp_set_error(packet, _("SEQUENCE uses indefinite length")); | |
992 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
993 | snmp_set_error(packet, _("No version number")); | |
994 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
995 | snmp_set_error(packet, _("Version uses indefinite length")); | |
996 | else if ((packet->version = asn1_get_integer(&bufptr, bufend, length)) | |
997 | != CUPS_SNMP_VERSION_1) | |
998 | snmp_set_error(packet, _("Bad SNMP version number")); | |
999 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_OCTET_STRING) | |
1000 | snmp_set_error(packet, _("No community name")); | |
1001 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1002 | snmp_set_error(packet, _("Community name uses indefinite length")); | |
1003 | else | |
1004 | { | |
1005 | asn1_get_string(&bufptr, bufend, length, packet->community, | |
1006 | sizeof(packet->community)); | |
1007 | ||
1008 | if ((packet->request_type = asn1_get_type(&bufptr, bufend)) | |
1009 | != CUPS_ASN1_GET_RESPONSE) | |
1010 | snmp_set_error(packet, _("Packet does not contain a Get-Response-PDU")); | |
1011 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
1012 | snmp_set_error(packet, _("Get-Response-PDU uses indefinite length")); | |
1013 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
1014 | snmp_set_error(packet, _("No request-id")); | |
1015 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1016 | snmp_set_error(packet, _("request-id uses indefinite length")); | |
1017 | else | |
1018 | { | |
1019 | packet->request_id = asn1_get_integer(&bufptr, bufend, length); | |
1020 | ||
1021 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
1022 | snmp_set_error(packet, _("No error-status")); | |
1023 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1024 | snmp_set_error(packet, _("error-status uses indefinite length")); | |
1025 | else | |
1026 | { | |
1027 | packet->error_status = asn1_get_integer(&bufptr, bufend, length); | |
1028 | ||
1029 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
1030 | snmp_set_error(packet, _("No error-index")); | |
1031 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1032 | snmp_set_error(packet, _("error-index uses indefinite length")); | |
1033 | else | |
1034 | { | |
1035 | packet->error_index = asn1_get_integer(&bufptr, bufend, length); | |
1036 | ||
1037 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
1038 | snmp_set_error(packet, _("No variable-bindings SEQUENCE")); | |
1039 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
1040 | snmp_set_error(packet, | |
1041 | _("variable-bindings uses indefinite length")); | |
1042 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
1043 | snmp_set_error(packet, _("No VarBind SEQUENCE")); | |
1044 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
1045 | snmp_set_error(packet, _("VarBind uses indefinite length")); | |
1046 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_OID) | |
1047 | snmp_set_error(packet, _("No name OID")); | |
1048 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1049 | snmp_set_error(packet, _("Name OID uses indefinite length")); | |
1050 | else | |
1051 | { | |
1052 | asn1_get_oid(&bufptr, bufend, length, packet->object_name, | |
1053 | CUPS_SNMP_MAX_OID); | |
1054 | ||
1055 | packet->object_type = asn1_get_type(&bufptr, bufend); | |
1056 | ||
1057 | if ((length = asn1_get_length(&bufptr, bufend)) == 0 && | |
1058 | packet->object_type != CUPS_ASN1_NULL_VALUE && | |
1059 | packet->object_type != CUPS_ASN1_OCTET_STRING) | |
1060 | snmp_set_error(packet, _("Value uses indefinite length")); | |
1061 | else | |
1062 | { | |
1063 | switch (packet->object_type) | |
1064 | { | |
1065 | case CUPS_ASN1_BOOLEAN : | |
1066 | packet->object_value.boolean = | |
1067 | asn1_get_integer(&bufptr, bufend, length); | |
1068 | break; | |
1069 | ||
1070 | case CUPS_ASN1_INTEGER : | |
1071 | packet->object_value.integer = | |
1072 | asn1_get_integer(&bufptr, bufend, length); | |
1073 | break; | |
1074 | ||
1075 | case CUPS_ASN1_NULL_VALUE : | |
1076 | break; | |
1077 | ||
1078 | case CUPS_ASN1_OCTET_STRING : | |
d1c13e16 MS |
1079 | case CUPS_ASN1_BIT_STRING : |
1080 | case CUPS_ASN1_HEX_STRING : | |
1081 | packet->object_value.string.num_bytes = length; | |
91c84a35 | 1082 | asn1_get_string(&bufptr, bufend, length, |
d1c13e16 | 1083 | (char *)packet->object_value.string.bytes, |
f3c17241 | 1084 | sizeof(packet->object_value.string.bytes)); |
91c84a35 MS |
1085 | break; |
1086 | ||
1087 | case CUPS_ASN1_OID : | |
1088 | asn1_get_oid(&bufptr, bufend, length, | |
1089 | packet->object_value.oid, CUPS_SNMP_MAX_OID); | |
1090 | break; | |
1091 | ||
1092 | case CUPS_ASN1_COUNTER : | |
1093 | packet->object_value.counter = | |
1094 | asn1_get_integer(&bufptr, bufend, length); | |
1095 | break; | |
1096 | ||
1097 | case CUPS_ASN1_GAUGE : | |
1098 | packet->object_value.gauge = | |
1099 | asn1_get_integer(&bufptr, bufend, length); | |
1100 | break; | |
1101 | ||
ac884b6a MS |
1102 | case CUPS_ASN1_TIMETICKS : |
1103 | packet->object_value.timeticks = | |
1104 | asn1_get_integer(&bufptr, bufend, length); | |
1105 | break; | |
1106 | ||
91c84a35 MS |
1107 | default : |
1108 | snmp_set_error(packet, _("Unsupported value type")); | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | return (packet->error ? -1 : 0); | |
1119 | } | |
1120 | ||
1121 | ||
91c84a35 MS |
1122 | /* |
1123 | * 'asn1_encode_snmp()' - Encode a SNMP packet. | |
1124 | */ | |
1125 | ||
1126 | static int /* O - Length on success, -1 on error */ | |
1127 | asn1_encode_snmp(unsigned char *buffer, /* I - Buffer */ | |
1128 | size_t bufsize, /* I - Size of buffer */ | |
1129 | cups_snmp_t *packet) /* I - SNMP packet */ | |
1130 | { | |
1131 | unsigned char *bufptr; /* Pointer into buffer */ | |
1132 | int total, /* Total length */ | |
1133 | msglen, /* Length of entire message */ | |
1134 | commlen, /* Length of community string */ | |
1135 | reqlen, /* Length of request */ | |
1136 | listlen, /* Length of variable list */ | |
1137 | varlen, /* Length of variable */ | |
1138 | namelen, /* Length of object name OID */ | |
1139 | valuelen; /* Length of object value */ | |
1140 | ||
1141 | ||
1142 | /* | |
1143 | * Get the lengths of the community string, OID, and message... | |
1144 | */ | |
1145 | ||
ac884b6a | 1146 | |
91c84a35 MS |
1147 | namelen = asn1_size_oid(packet->object_name); |
1148 | ||
1149 | switch (packet->object_type) | |
1150 | { | |
1151 | case CUPS_ASN1_NULL_VALUE : | |
1152 | valuelen = 0; | |
1153 | break; | |
1154 | ||
1155 | case CUPS_ASN1_BOOLEAN : | |
1156 | valuelen = asn1_size_integer(packet->object_value.boolean); | |
1157 | break; | |
1158 | ||
1159 | case CUPS_ASN1_INTEGER : | |
1160 | valuelen = asn1_size_integer(packet->object_value.integer); | |
1161 | break; | |
1162 | ||
1163 | case CUPS_ASN1_OCTET_STRING : | |
d1c13e16 | 1164 | valuelen = packet->object_value.string.num_bytes; |
91c84a35 MS |
1165 | break; |
1166 | ||
1167 | case CUPS_ASN1_OID : | |
1168 | valuelen = asn1_size_oid(packet->object_value.oid); | |
1169 | break; | |
1170 | ||
1171 | default : | |
1172 | packet->error = "Unknown object type"; | |
1173 | return (-1); | |
1174 | } | |
1175 | ||
1176 | varlen = 1 + asn1_size_length(namelen) + namelen + | |
1177 | 1 + asn1_size_length(valuelen) + valuelen; | |
1178 | listlen = 1 + asn1_size_length(varlen) + varlen; | |
1179 | reqlen = 2 + asn1_size_integer(packet->request_id) + | |
1180 | 2 + asn1_size_integer(packet->error_status) + | |
1181 | 2 + asn1_size_integer(packet->error_index) + | |
1182 | 1 + asn1_size_length(listlen) + listlen; | |
1183 | commlen = strlen(packet->community); | |
1184 | msglen = 2 + asn1_size_integer(packet->version) + | |
1185 | 1 + asn1_size_length(commlen) + commlen + | |
1186 | 1 + asn1_size_length(reqlen) + reqlen; | |
1187 | total = 1 + asn1_size_length(msglen) + msglen; | |
1188 | ||
536bc2c6 | 1189 | if (total > (int)bufsize) |
91c84a35 MS |
1190 | { |
1191 | packet->error = "Message too large for buffer"; | |
1192 | return (-1); | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Then format the message... | |
1197 | */ | |
1198 | ||
1199 | bufptr = buffer; | |
1200 | ||
1201 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* SNMPv1 message header */ | |
1202 | asn1_set_length(&bufptr, msglen); | |
1203 | ||
1204 | asn1_set_integer(&bufptr, packet->version); | |
1205 | /* version */ | |
1206 | ||
1207 | *bufptr++ = CUPS_ASN1_OCTET_STRING; /* community */ | |
1208 | asn1_set_length(&bufptr, commlen); | |
1209 | memcpy(bufptr, packet->community, commlen); | |
1210 | bufptr += commlen; | |
1211 | ||
ac884b6a | 1212 | *bufptr++ = packet->request_type; /* Get-Request-PDU/Get-Next-Request-PDU */ |
91c84a35 MS |
1213 | asn1_set_length(&bufptr, reqlen); |
1214 | ||
1215 | asn1_set_integer(&bufptr, packet->request_id); | |
1216 | ||
1217 | asn1_set_integer(&bufptr, packet->error_status); | |
1218 | ||
1219 | asn1_set_integer(&bufptr, packet->error_index); | |
1220 | ||
1221 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* variable-bindings */ | |
1222 | asn1_set_length(&bufptr, listlen); | |
1223 | ||
1224 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* variable */ | |
1225 | asn1_set_length(&bufptr, varlen); | |
1226 | ||
1227 | asn1_set_oid(&bufptr, packet->object_name); | |
1228 | /* ObjectName */ | |
1229 | ||
1230 | switch (packet->object_type) | |
1231 | { | |
1232 | case CUPS_ASN1_NULL_VALUE : | |
1233 | *bufptr++ = CUPS_ASN1_NULL_VALUE; | |
1234 | /* ObjectValue */ | |
1235 | *bufptr++ = 0; /* Length */ | |
1236 | break; | |
1237 | ||
1238 | case CUPS_ASN1_BOOLEAN : | |
1239 | asn1_set_integer(&bufptr, packet->object_value.boolean); | |
1240 | break; | |
1241 | ||
1242 | case CUPS_ASN1_INTEGER : | |
1243 | asn1_set_integer(&bufptr, packet->object_value.integer); | |
1244 | break; | |
1245 | ||
1246 | case CUPS_ASN1_OCTET_STRING : | |
1247 | *bufptr++ = CUPS_ASN1_OCTET_STRING; | |
1248 | asn1_set_length(&bufptr, valuelen); | |
d1c13e16 | 1249 | memcpy(bufptr, packet->object_value.string.bytes, valuelen); |
91c84a35 MS |
1250 | bufptr += valuelen; |
1251 | break; | |
1252 | ||
1253 | case CUPS_ASN1_OID : | |
1254 | asn1_set_oid(&bufptr, packet->object_value.oid); | |
1255 | break; | |
1256 | ||
1257 | default : | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | return (bufptr - buffer); | |
1262 | } | |
1263 | ||
1264 | ||
1265 | /* | |
1266 | * 'asn1_get_integer()' - Get an integer value. | |
1267 | */ | |
1268 | ||
1269 | static int /* O - Integer value */ | |
1270 | asn1_get_integer( | |
1271 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1272 | unsigned char *bufend, /* I - End of buffer */ | |
1273 | int length) /* I - Length of value */ | |
1274 | { | |
1275 | int value; /* Integer value */ | |
1276 | ||
1277 | ||
41681883 MS |
1278 | if (length > sizeof(int)) |
1279 | { | |
1280 | (*buffer) += length; | |
1281 | return (0); | |
1282 | } | |
1283 | ||
18ecb428 | 1284 | for (value = (**buffer & 0x80) ? -1 : 0; |
91c84a35 MS |
1285 | length > 0 && *buffer < bufend; |
1286 | length --, (*buffer) ++) | |
1287 | value = (value << 8) | **buffer; | |
1288 | ||
1289 | return (value); | |
1290 | } | |
1291 | ||
1292 | ||
1293 | /* | |
1294 | * 'asn1_get_length()' - Get a value length. | |
1295 | */ | |
1296 | ||
41681883 | 1297 | static unsigned /* O - Length */ |
91c84a35 MS |
1298 | asn1_get_length(unsigned char **buffer, /* IO - Pointer in buffer */ |
1299 | unsigned char *bufend) /* I - End of buffer */ | |
1300 | { | |
41681883 | 1301 | unsigned length; /* Length */ |
91c84a35 MS |
1302 | |
1303 | ||
1304 | length = **buffer; | |
1305 | (*buffer) ++; | |
1306 | ||
1307 | if (length & 128) | |
41681883 MS |
1308 | { |
1309 | int count; /* Number of bytes for length */ | |
1310 | ||
1311 | ||
1312 | if ((count = length & 127) > sizeof(unsigned)) | |
1313 | { | |
1314 | (*buffer) += count; | |
1315 | return (0); | |
1316 | } | |
1317 | ||
1318 | for (length = 0; | |
1319 | count > 0 && *buffer < bufend; | |
1320 | count --, (*buffer) ++) | |
1321 | length = (length << 8) | **buffer; | |
1322 | } | |
91c84a35 MS |
1323 | |
1324 | return (length); | |
1325 | } | |
1326 | ||
1327 | ||
1328 | /* | |
1329 | * 'asn1_get_oid()' - Get an OID value. | |
1330 | */ | |
1331 | ||
ac884b6a | 1332 | static int /* O - Number of OIDs */ |
91c84a35 MS |
1333 | asn1_get_oid( |
1334 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1335 | unsigned char *bufend, /* I - End of buffer */ | |
1336 | int length, /* I - Length of value */ | |
1337 | int *oid, /* I - OID buffer */ | |
1338 | int oidsize) /* I - Size of OID buffer */ | |
1339 | { | |
1340 | unsigned char *valend; /* End of value */ | |
ac884b6a MS |
1341 | int *oidptr, /* Current OID */ |
1342 | *oidend; /* End of OID buffer */ | |
91c84a35 MS |
1343 | int number; /* OID number */ |
1344 | ||
1345 | ||
1346 | valend = *buffer + length; | |
ac884b6a | 1347 | oidptr = oid; |
91c84a35 MS |
1348 | oidend = oid + oidsize - 1; |
1349 | ||
1350 | if (valend > bufend) | |
1351 | valend = bufend; | |
1352 | ||
1353 | number = asn1_get_packed(buffer, bufend); | |
1354 | ||
1355 | if (number < 80) | |
1356 | { | |
ac884b6a MS |
1357 | *oidptr++ = number / 40; |
1358 | number = number % 40; | |
1359 | *oidptr++ = number; | |
91c84a35 MS |
1360 | } |
1361 | else | |
1362 | { | |
ac884b6a MS |
1363 | *oidptr++ = 2; |
1364 | number -= 80; | |
1365 | *oidptr++ = number; | |
91c84a35 MS |
1366 | } |
1367 | ||
1368 | while (*buffer < valend) | |
1369 | { | |
1370 | number = asn1_get_packed(buffer, bufend); | |
1371 | ||
ac884b6a MS |
1372 | if (oidptr < oidend) |
1373 | *oidptr++ = number; | |
91c84a35 MS |
1374 | } |
1375 | ||
ac884b6a | 1376 | *oidptr = -1; |
91c84a35 | 1377 | |
ac884b6a | 1378 | return (oidptr - oid); |
91c84a35 MS |
1379 | } |
1380 | ||
1381 | ||
1382 | /* | |
1383 | * 'asn1_get_packed()' - Get a packed integer value. | |
1384 | */ | |
1385 | ||
1386 | static int /* O - Value */ | |
1387 | asn1_get_packed( | |
1388 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1389 | unsigned char *bufend) /* I - End of buffer */ | |
1390 | { | |
1391 | int value; /* Value */ | |
1392 | ||
1393 | ||
1394 | value = 0; | |
1395 | ||
1396 | while ((**buffer & 128) && *buffer < bufend) | |
1397 | { | |
1398 | value = (value << 7) | (**buffer & 127); | |
1399 | (*buffer) ++; | |
1400 | } | |
1401 | ||
1402 | if (*buffer < bufend) | |
1403 | { | |
1404 | value = (value << 7) | **buffer; | |
1405 | (*buffer) ++; | |
1406 | } | |
1407 | ||
1408 | return (value); | |
1409 | } | |
1410 | ||
1411 | ||
1412 | /* | |
1413 | * 'asn1_get_string()' - Get a string value. | |
1414 | */ | |
1415 | ||
1416 | static char * /* O - String */ | |
1417 | asn1_get_string( | |
1418 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1419 | unsigned char *bufend, /* I - End of buffer */ | |
1420 | int length, /* I - Value length */ | |
1421 | char *string, /* I - String buffer */ | |
1422 | int strsize) /* I - String buffer size */ | |
1423 | { | |
321d8d57 MS |
1424 | if (length > (bufend - *buffer)) |
1425 | length = bufend - *buffer; | |
1426 | ||
91c84a35 MS |
1427 | if (length < 0) |
1428 | { | |
1429 | /* | |
1430 | * Disallow negative lengths! | |
1431 | */ | |
1432 | ||
1433 | *string = '\0'; | |
1434 | } | |
1435 | else if (length < strsize) | |
1436 | { | |
1437 | /* | |
1438 | * String is smaller than the buffer... | |
1439 | */ | |
1440 | ||
1441 | if (length > 0) | |
1442 | memcpy(string, *buffer, length); | |
1443 | ||
1444 | string[length] = '\0'; | |
1445 | } | |
1446 | else | |
1447 | { | |
1448 | /* | |
1449 | * String is larger than the buffer... | |
1450 | */ | |
1451 | ||
1452 | memcpy(string, *buffer, strsize - 1); | |
1453 | string[strsize - 1] = '\0'; | |
1454 | } | |
1455 | ||
1456 | if (length > 0) | |
1457 | (*buffer) += length; | |
1458 | ||
1459 | return (length < 0 ? NULL : string); | |
1460 | } | |
1461 | ||
1462 | ||
1463 | /* | |
1464 | * 'asn1_get_type()' - Get a value type. | |
1465 | */ | |
1466 | ||
1467 | static int /* O - Type */ | |
1468 | asn1_get_type(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1469 | unsigned char *bufend) /* I - End of buffer */ | |
1470 | { | |
1471 | int type; /* Type */ | |
1472 | ||
1473 | ||
1474 | type = **buffer; | |
1475 | (*buffer) ++; | |
1476 | ||
1477 | if ((type & 31) == 31) | |
1478 | type = asn1_get_packed(buffer, bufend); | |
1479 | ||
1480 | return (type); | |
1481 | } | |
1482 | ||
1483 | ||
1484 | /* | |
1485 | * 'asn1_set_integer()' - Set an integer value. | |
1486 | */ | |
1487 | ||
1488 | static void | |
1489 | asn1_set_integer(unsigned char **buffer,/* IO - Pointer in buffer */ | |
1490 | int integer) /* I - Integer value */ | |
1491 | { | |
1492 | **buffer = CUPS_ASN1_INTEGER; | |
1493 | (*buffer) ++; | |
1494 | ||
1495 | if (integer > 0x7fffff || integer < -0x800000) | |
1496 | { | |
1497 | **buffer = 4; | |
1498 | (*buffer) ++; | |
1499 | **buffer = integer >> 24; | |
1500 | (*buffer) ++; | |
1501 | **buffer = integer >> 16; | |
1502 | (*buffer) ++; | |
1503 | **buffer = integer >> 8; | |
1504 | (*buffer) ++; | |
1505 | **buffer = integer; | |
1506 | (*buffer) ++; | |
1507 | } | |
1508 | else if (integer > 0x7fff || integer < -0x8000) | |
1509 | { | |
1510 | **buffer = 3; | |
1511 | (*buffer) ++; | |
1512 | **buffer = integer >> 16; | |
1513 | (*buffer) ++; | |
1514 | **buffer = integer >> 8; | |
1515 | (*buffer) ++; | |
1516 | **buffer = integer; | |
1517 | (*buffer) ++; | |
1518 | } | |
1519 | else if (integer > 0x7f || integer < -0x80) | |
1520 | { | |
1521 | **buffer = 2; | |
1522 | (*buffer) ++; | |
1523 | **buffer = integer >> 8; | |
1524 | (*buffer) ++; | |
1525 | **buffer = integer; | |
1526 | (*buffer) ++; | |
1527 | } | |
1528 | else | |
1529 | { | |
1530 | **buffer = 1; | |
1531 | (*buffer) ++; | |
1532 | **buffer = integer; | |
1533 | (*buffer) ++; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | ||
1538 | /* | |
1539 | * 'asn1_set_length()' - Set a value length. | |
1540 | */ | |
1541 | ||
1542 | static void | |
1543 | asn1_set_length(unsigned char **buffer, /* IO - Pointer in buffer */ | |
41681883 | 1544 | unsigned length) /* I - Length value */ |
91c84a35 MS |
1545 | { |
1546 | if (length > 255) | |
1547 | { | |
1548 | **buffer = 0x82; /* 2-byte length */ | |
1549 | (*buffer) ++; | |
1550 | **buffer = length >> 8; | |
1551 | (*buffer) ++; | |
1552 | **buffer = length; | |
1553 | (*buffer) ++; | |
1554 | } | |
1555 | else if (length > 127) | |
1556 | { | |
1557 | **buffer = 0x81; /* 1-byte length */ | |
1558 | (*buffer) ++; | |
1559 | **buffer = length; | |
1560 | (*buffer) ++; | |
1561 | } | |
1562 | else | |
1563 | { | |
1564 | **buffer = length; /* Length */ | |
1565 | (*buffer) ++; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | ||
1570 | /* | |
1571 | * 'asn1_set_oid()' - Set an OID value. | |
1572 | */ | |
1573 | ||
1574 | static void | |
1575 | asn1_set_oid(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1576 | const int *oid) /* I - OID value */ | |
1577 | { | |
1578 | **buffer = CUPS_ASN1_OID; | |
1579 | (*buffer) ++; | |
1580 | ||
1581 | asn1_set_length(buffer, asn1_size_oid(oid)); | |
1582 | ||
ac884b6a MS |
1583 | if (oid[1] < 0) |
1584 | { | |
1585 | asn1_set_packed(buffer, oid[0] * 40); | |
1586 | return; | |
1587 | } | |
1588 | ||
91c84a35 MS |
1589 | asn1_set_packed(buffer, oid[0] * 40 + oid[1]); |
1590 | ||
ac884b6a | 1591 | for (oid += 2; *oid >= 0; oid ++) |
91c84a35 MS |
1592 | asn1_set_packed(buffer, *oid); |
1593 | } | |
1594 | ||
1595 | ||
1596 | /* | |
1597 | * 'asn1_set_packed()' - Set a packed integer value. | |
1598 | */ | |
1599 | ||
1600 | static void | |
1601 | asn1_set_packed(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1602 | int integer) /* I - Integer value */ | |
1603 | { | |
1604 | if (integer > 0xfffffff) | |
1605 | { | |
ac884b6a | 1606 | **buffer = ((integer >> 28) & 0x7f) | 0x80; |
91c84a35 MS |
1607 | (*buffer) ++; |
1608 | } | |
1609 | ||
1610 | if (integer > 0x1fffff) | |
1611 | { | |
ac884b6a | 1612 | **buffer = ((integer >> 21) & 0x7f) | 0x80; |
91c84a35 MS |
1613 | (*buffer) ++; |
1614 | } | |
1615 | ||
1616 | if (integer > 0x3fff) | |
1617 | { | |
ac884b6a | 1618 | **buffer = ((integer >> 14) & 0x7f) | 0x80; |
91c84a35 MS |
1619 | (*buffer) ++; |
1620 | } | |
1621 | ||
1622 | if (integer > 0x7f) | |
1623 | { | |
ac884b6a | 1624 | **buffer = ((integer >> 7) & 0x7f) | 0x80; |
91c84a35 MS |
1625 | (*buffer) ++; |
1626 | } | |
1627 | ||
1628 | **buffer = integer & 0x7f; | |
1629 | (*buffer) ++; | |
1630 | } | |
1631 | ||
1632 | ||
1633 | /* | |
1634 | * 'asn1_size_integer()' - Figure out the number of bytes needed for an | |
1635 | * integer value. | |
1636 | */ | |
1637 | ||
1638 | static int /* O - Size in bytes */ | |
1639 | asn1_size_integer(int integer) /* I - Integer value */ | |
1640 | { | |
1641 | if (integer > 0x7fffff || integer < -0x800000) | |
1642 | return (4); | |
1643 | else if (integer > 0x7fff || integer < -0x8000) | |
1644 | return (3); | |
1645 | else if (integer > 0x7f || integer < -0x80) | |
1646 | return (2); | |
1647 | else | |
1648 | return (1); | |
1649 | } | |
1650 | ||
1651 | ||
1652 | /* | |
1653 | * 'asn1_size_length()' - Figure out the number of bytes needed for a | |
1654 | * length value. | |
1655 | */ | |
1656 | ||
1657 | static int /* O - Size in bytes */ | |
1658 | asn1_size_length(int length) /* I - Length value */ | |
1659 | { | |
1660 | if (length > 0xff) | |
1661 | return (3); | |
1662 | else if (length > 0x7f) | |
1663 | return (2); | |
1664 | else | |
1665 | return (1); | |
1666 | } | |
1667 | ||
1668 | ||
1669 | /* | |
1670 | * 'asn1_size_oid()' - Figure out the numebr of bytes needed for an | |
1671 | * OID value. | |
1672 | */ | |
1673 | ||
1674 | static int /* O - Size in bytes */ | |
1675 | asn1_size_oid(const int *oid) /* I - OID value */ | |
1676 | { | |
1677 | int length; /* Length of value */ | |
1678 | ||
1679 | ||
ac884b6a MS |
1680 | if (oid[1] < 0) |
1681 | return (asn1_size_packed(oid[0] * 40)); | |
1682 | ||
1683 | for (length = asn1_size_packed(oid[0] * 40 + oid[1]), oid += 2; | |
1684 | *oid >= 0; | |
1685 | oid ++) | |
91c84a35 MS |
1686 | length += asn1_size_packed(*oid); |
1687 | ||
1688 | return (length); | |
1689 | } | |
1690 | ||
1691 | ||
1692 | /* | |
1693 | * 'asn1_size_packed()' - Figure out the number of bytes needed for a | |
1694 | * packed integer value. | |
1695 | */ | |
1696 | ||
1697 | static int /* O - Size in bytes */ | |
1698 | asn1_size_packed(int integer) /* I - Integer value */ | |
1699 | { | |
1700 | if (integer > 0xfffffff) | |
1701 | return (5); | |
1702 | else if (integer > 0x1fffff) | |
1703 | return (4); | |
1704 | else if (integer > 0x3fff) | |
1705 | return (3); | |
1706 | else if (integer > 0x7f) | |
1707 | return (2); | |
1708 | else | |
1709 | return (1); | |
1710 | } | |
1711 | ||
1712 | ||
1713 | /* | |
1714 | * 'snmp_set_error()' - Set the localized error for a packet. | |
1715 | */ | |
1716 | ||
1717 | static void | |
1718 | snmp_set_error(cups_snmp_t *packet, /* I - Packet */ | |
1719 | const char *message) /* I - Error message */ | |
1720 | { | |
1721 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
1722 | ||
1723 | ||
1724 | if (!cg->lang_default) | |
1725 | cg->lang_default = cupsLangDefault(); | |
1726 | ||
1727 | packet->error = _cupsLangString(cg->lang_default, message); | |
1728 | } | |
1729 | ||
1730 | ||
1731 | /* | |
1732 | * End of "$Id$". | |
1733 | */ |