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Commit | Line | Data |
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91c84a35 | 1 | /* |
87e98392 | 2 | * SNMP functions for CUPS. |
91c84a35 | 3 | * |
53f8d64f MS |
4 | * Copyright © 2007-2014 by Apple Inc. |
5 | * Copyright © 2006-2007 by Easy Software Products, all rights reserved. | |
91c84a35 | 6 | * |
53f8d64f MS |
7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more |
8 | * information. | |
91c84a35 MS |
9 | */ |
10 | ||
11 | /* | |
12 | * Include necessary headers. | |
13 | */ | |
14 | ||
71e16022 | 15 | #include "cups-private.h" |
7a14d768 | 16 | #include "snmp-private.h" |
91c84a35 | 17 | #ifdef HAVE_POLL |
dcb445bc | 18 | # include <poll.h> |
91c84a35 MS |
19 | #endif /* HAVE_POLL */ |
20 | ||
21 | ||
22 | /* | |
23 | * Local functions... | |
24 | */ | |
25 | ||
91c84a35 MS |
26 | static void asn1_debug(const char *prefix, unsigned char *buffer, |
27 | size_t len, int indent); | |
ac884b6a MS |
28 | static int asn1_decode_snmp(unsigned char *buffer, size_t len, |
29 | cups_snmp_t *packet); | |
91c84a35 MS |
30 | static int asn1_encode_snmp(unsigned char *buffer, size_t len, |
31 | cups_snmp_t *packet); | |
32 | static int asn1_get_integer(unsigned char **buffer, | |
33 | unsigned char *bufend, | |
7e86f2f6 | 34 | unsigned length); |
91c84a35 MS |
35 | static int asn1_get_oid(unsigned char **buffer, |
36 | unsigned char *bufend, | |
7e86f2f6 | 37 | unsigned length, int *oid, int oidsize); |
91c84a35 MS |
38 | static int asn1_get_packed(unsigned char **buffer, |
39 | unsigned char *bufend); | |
40 | static char *asn1_get_string(unsigned char **buffer, | |
41 | unsigned char *bufend, | |
7e86f2f6 MS |
42 | unsigned length, char *string, |
43 | size_t strsize); | |
41681883 | 44 | static unsigned asn1_get_length(unsigned char **buffer, |
91c84a35 MS |
45 | unsigned char *bufend); |
46 | static int asn1_get_type(unsigned char **buffer, | |
47 | unsigned char *bufend); | |
48 | static void asn1_set_integer(unsigned char **buffer, | |
49 | int integer); | |
50 | static void asn1_set_length(unsigned char **buffer, | |
41681883 | 51 | unsigned length); |
91c84a35 MS |
52 | static void asn1_set_oid(unsigned char **buffer, |
53 | const int *oid); | |
54 | static void asn1_set_packed(unsigned char **buffer, | |
55 | int integer); | |
7e86f2f6 MS |
56 | static unsigned asn1_size_integer(int integer); |
57 | static unsigned asn1_size_length(unsigned length); | |
58 | static unsigned asn1_size_oid(const int *oid); | |
59 | static unsigned asn1_size_packed(int integer); | |
91c84a35 MS |
60 | static void snmp_set_error(cups_snmp_t *packet, |
61 | const char *message); | |
62 | ||
63 | ||
64 | /* | |
7a14d768 | 65 | * '_cupsSNMPClose()' - Close a SNMP socket. |
91c84a35 MS |
66 | */ |
67 | ||
68 | void | |
7a14d768 | 69 | _cupsSNMPClose(int fd) /* I - SNMP socket file descriptor */ |
91c84a35 | 70 | { |
e07d4801 | 71 | DEBUG_printf(("4_cupsSNMPClose(fd=%d)", fd)); |
969307f0 | 72 | |
87e98392 | 73 | httpAddrClose(NULL, fd); |
91c84a35 MS |
74 | } |
75 | ||
76 | ||
77 | /* | |
7a14d768 | 78 | * '_cupsSNMPCopyOID()' - Copy an OID. |
ac884b6a MS |
79 | * |
80 | * The array pointed to by "src" is terminated by the value -1. | |
91c84a35 MS |
81 | */ |
82 | ||
83 | int * /* O - New OID */ | |
7a14d768 MS |
84 | _cupsSNMPCopyOID(int *dst, /* I - Destination OID */ |
85 | const int *src, /* I - Source OID */ | |
86 | int dstsize) /* I - Number of integers in dst */ | |
91c84a35 MS |
87 | { |
88 | int i; /* Looping var */ | |
89 | ||
90 | ||
e07d4801 | 91 | DEBUG_printf(("4_cupsSNMPCopyOID(dst=%p, src=%p, dstsize=%d)", dst, src, |
969307f0 MS |
92 | dstsize)); |
93 | ||
ac884b6a | 94 | for (i = 0, dstsize --; src[i] >= 0 && i < dstsize; i ++) |
91c84a35 MS |
95 | dst[i] = src[i]; |
96 | ||
ac884b6a | 97 | dst[i] = -1; |
91c84a35 MS |
98 | |
99 | return (dst); | |
100 | } | |
101 | ||
102 | ||
ac884b6a | 103 | /* |
7a14d768 | 104 | * '_cupsSNMPDefaultCommunity()' - Get the default SNMP community name. |
ac884b6a MS |
105 | * |
106 | * The default community name is the first community name found in the | |
107 | * snmp.conf file. If no community name is defined there, "public" is used. | |
ac884b6a MS |
108 | */ |
109 | ||
110 | const char * /* O - Default community name */ | |
7a14d768 | 111 | _cupsSNMPDefaultCommunity(void) |
ac884b6a MS |
112 | { |
113 | cups_file_t *fp; /* snmp.conf file */ | |
114 | char line[1024], /* Line from file */ | |
115 | *value; /* Value from file */ | |
116 | int linenum; /* Line number in file */ | |
117 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
118 | ||
119 | ||
e07d4801 | 120 | DEBUG_puts("4_cupsSNMPDefaultCommunity()"); |
969307f0 | 121 | |
ac884b6a MS |
122 | if (!cg->snmp_community[0]) |
123 | { | |
124 | strlcpy(cg->snmp_community, "public", sizeof(cg->snmp_community)); | |
125 | ||
126 | snprintf(line, sizeof(line), "%s/snmp.conf", cg->cups_serverroot); | |
127 | if ((fp = cupsFileOpen(line, "r")) != NULL) | |
128 | { | |
129 | linenum = 0; | |
130 | while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum)) | |
88f9aafc | 131 | if (!_cups_strcasecmp(line, "Community") && value) |
ac884b6a MS |
132 | { |
133 | strlcpy(cg->snmp_community, value, sizeof(cg->snmp_community)); | |
134 | break; | |
135 | } | |
136 | ||
137 | cupsFileClose(fp); | |
138 | } | |
139 | } | |
140 | ||
e07d4801 | 141 | DEBUG_printf(("5_cupsSNMPDefaultCommunity: Returning \"%s\"", |
969307f0 MS |
142 | cg->snmp_community)); |
143 | ||
ac884b6a MS |
144 | return (cg->snmp_community); |
145 | } | |
146 | ||
147 | ||
91c84a35 | 148 | /* |
7a14d768 | 149 | * '_cupsSNMPIsOID()' - Test whether a SNMP response contains the specified OID. |
91c84a35 | 150 | * |
ac884b6a | 151 | * The array pointed to by "oid" is terminated by the value -1. |
91c84a35 MS |
152 | */ |
153 | ||
154 | int /* O - 1 if equal, 0 if not equal */ | |
7a14d768 MS |
155 | _cupsSNMPIsOID(cups_snmp_t *packet, /* I - Response packet */ |
156 | const int *oid) /* I - OID */ | |
91c84a35 MS |
157 | { |
158 | int i; /* Looping var */ | |
159 | ||
160 | ||
161 | /* | |
162 | * Range check input... | |
163 | */ | |
164 | ||
e07d4801 | 165 | DEBUG_printf(("4_cupsSNMPIsOID(packet=%p, oid=%p)", packet, oid)); |
969307f0 | 166 | |
91c84a35 | 167 | if (!packet || !oid) |
969307f0 | 168 | { |
e07d4801 | 169 | DEBUG_puts("5_cupsSNMPIsOID: Returning 0"); |
969307f0 | 170 | |
91c84a35 | 171 | return (0); |
969307f0 | 172 | } |
91c84a35 MS |
173 | |
174 | /* | |
175 | * Compare OIDs... | |
176 | */ | |
177 | ||
ac884b6a MS |
178 | for (i = 0; |
179 | i < CUPS_SNMP_MAX_OID && oid[i] >= 0 && packet->object_name[i] >= 0; | |
180 | i ++) | |
91c84a35 | 181 | if (oid[i] != packet->object_name[i]) |
969307f0 | 182 | { |
e07d4801 | 183 | DEBUG_puts("5_cupsSNMPIsOID: Returning 0"); |
969307f0 | 184 | |
91c84a35 | 185 | return (0); |
969307f0 MS |
186 | } |
187 | ||
e07d4801 | 188 | DEBUG_printf(("5_cupsSNMPIsOID: Returning %d", |
969307f0 | 189 | i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i])); |
91c84a35 MS |
190 | |
191 | return (i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i]); | |
192 | } | |
193 | ||
194 | ||
195 | /* | |
7a14d768 MS |
196 | * '_cupsSNMPIsOIDPrefixed()' - Test whether a SNMP response uses the specified |
197 | * OID prefix. | |
91c84a35 | 198 | * |
ac884b6a | 199 | * The array pointed to by "prefix" is terminated by the value -1. |
91c84a35 MS |
200 | */ |
201 | ||
202 | int /* O - 1 if prefixed, 0 if not prefixed */ | |
7a14d768 | 203 | _cupsSNMPIsOIDPrefixed( |
91c84a35 MS |
204 | cups_snmp_t *packet, /* I - Response packet */ |
205 | const int *prefix) /* I - OID prefix */ | |
206 | { | |
207 | int i; /* Looping var */ | |
208 | ||
209 | ||
210 | /* | |
211 | * Range check input... | |
212 | */ | |
213 | ||
e07d4801 | 214 | DEBUG_printf(("4_cupsSNMPIsOIDPrefixed(packet=%p, prefix=%p)", packet, |
969307f0 MS |
215 | prefix)); |
216 | ||
91c84a35 | 217 | if (!packet || !prefix) |
969307f0 | 218 | { |
e07d4801 | 219 | DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0"); |
969307f0 | 220 | |
91c84a35 | 221 | return (0); |
969307f0 | 222 | } |
91c84a35 MS |
223 | |
224 | /* | |
225 | * Compare OIDs... | |
226 | */ | |
227 | ||
228 | for (i = 0; | |
ac884b6a | 229 | i < CUPS_SNMP_MAX_OID && prefix[i] >= 0 && packet->object_name[i] >= 0; |
91c84a35 MS |
230 | i ++) |
231 | if (prefix[i] != packet->object_name[i]) | |
969307f0 | 232 | { |
e07d4801 | 233 | DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0"); |
969307f0 | 234 | |
91c84a35 | 235 | return (0); |
969307f0 MS |
236 | } |
237 | ||
e07d4801 | 238 | DEBUG_printf(("5_cupsSNMPIsOIDPrefixed: Returning %d", |
969307f0 | 239 | i < CUPS_SNMP_MAX_OID)); |
91c84a35 MS |
240 | |
241 | return (i < CUPS_SNMP_MAX_OID); | |
242 | } | |
243 | ||
244 | ||
20fbc903 MS |
245 | /* |
246 | * '_cupsSNMPOIDToString()' - Convert an OID to a string. | |
20fbc903 MS |
247 | */ |
248 | ||
249 | ||
250 | char * /* O - New string or @code NULL@ on error */ | |
251 | _cupsSNMPOIDToString(const int *src, /* I - OID */ | |
252 | char *dst, /* I - String buffer */ | |
253 | size_t dstsize) /* I - Size of string buffer */ | |
254 | { | |
255 | char *dstptr, /* Pointer into string buffer */ | |
256 | *dstend; /* End of string buffer */ | |
257 | ||
258 | ||
e07d4801 | 259 | DEBUG_printf(("4_cupsSNMPOIDToString(src=%p, dst=%p, dstsize=" CUPS_LLFMT ")", |
20fbc903 MS |
260 | src, dst, CUPS_LLCAST dstsize)); |
261 | ||
262 | /* | |
263 | * Range check input... | |
264 | */ | |
265 | ||
266 | if (!src || !dst || dstsize < 4) | |
267 | return (NULL); | |
268 | ||
269 | /* | |
270 | * Loop through the OID array and build a string... | |
271 | */ | |
272 | ||
273 | for (dstptr = dst, dstend = dstptr + dstsize - 1; | |
274 | *src >= 0 && dstptr < dstend; | |
275 | src ++, dstptr += strlen(dstptr)) | |
07623986 | 276 | snprintf(dstptr, (size_t)(dstend - dstptr + 1), ".%d", *src); |
20fbc903 MS |
277 | |
278 | if (*src >= 0) | |
279 | return (NULL); | |
280 | else | |
281 | return (dst); | |
282 | } | |
283 | ||
284 | ||
91c84a35 | 285 | /* |
7a14d768 | 286 | * '_cupsSNMPOpen()' - Open a SNMP socket. |
91c84a35 MS |
287 | */ |
288 | ||
289 | int /* O - SNMP socket file descriptor */ | |
7a14d768 | 290 | _cupsSNMPOpen(int family) /* I - Address family - @code AF_INET@ or @code AF_INET6@ */ |
91c84a35 MS |
291 | { |
292 | int fd; /* SNMP socket file descriptor */ | |
293 | int val; /* Socket option value */ | |
294 | ||
295 | ||
296 | /* | |
297 | * Create the SNMP socket... | |
298 | */ | |
299 | ||
e07d4801 | 300 | DEBUG_printf(("4_cupsSNMPOpen(family=%d)", family)); |
969307f0 | 301 | |
ac884b6a | 302 | if ((fd = socket(family, SOCK_DGRAM, 0)) < 0) |
969307f0 | 303 | { |
e07d4801 | 304 | DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno))); |
969307f0 | 305 | |
91c84a35 | 306 | return (-1); |
969307f0 | 307 | } |
91c84a35 MS |
308 | |
309 | /* | |
310 | * Set the "broadcast" flag... | |
311 | */ | |
312 | ||
313 | val = 1; | |
314 | ||
db8b865d | 315 | if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, CUPS_SOCAST &val, sizeof(val))) |
91c84a35 | 316 | { |
e07d4801 | 317 | DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno))); |
969307f0 | 318 | |
91c84a35 MS |
319 | close(fd); |
320 | ||
321 | return (-1); | |
322 | } | |
323 | ||
e07d4801 | 324 | DEBUG_printf(("5_cupsSNMPOpen: Returning %d", fd)); |
969307f0 | 325 | |
91c84a35 MS |
326 | return (fd); |
327 | } | |
328 | ||
329 | ||
330 | /* | |
7a14d768 | 331 | * '_cupsSNMPRead()' - Read and parse a SNMP response. |
91c84a35 | 332 | * |
7a14d768 | 333 | * If "timeout" is negative, @code _cupsSNMPRead@ will wait for a response |
91c84a35 | 334 | * indefinitely. |
91c84a35 MS |
335 | */ |
336 | ||
ac884b6a | 337 | cups_snmp_t * /* O - SNMP packet or @code NULL@ if none */ |
7a14d768 | 338 | _cupsSNMPRead(int fd, /* I - SNMP socket file descriptor */ |
969307f0 MS |
339 | cups_snmp_t *packet, /* I - SNMP packet buffer */ |
340 | double timeout) /* I - Timeout in seconds */ | |
91c84a35 MS |
341 | { |
342 | unsigned char buffer[CUPS_SNMP_MAX_PACKET]; | |
343 | /* Data packet */ | |
7e86f2f6 | 344 | ssize_t bytes; /* Number of bytes received */ |
91c84a35 | 345 | socklen_t addrlen; /* Source address length */ |
ac884b6a | 346 | http_addr_t address; /* Source address */ |
91c84a35 MS |
347 | |
348 | ||
349 | /* | |
350 | * Range check input... | |
351 | */ | |
352 | ||
e07d4801 | 353 | DEBUG_printf(("4_cupsSNMPRead(fd=%d, packet=%p, timeout=%.1f)", fd, packet, |
969307f0 MS |
354 | timeout)); |
355 | ||
91c84a35 | 356 | if (fd < 0 || !packet) |
969307f0 | 357 | { |
e07d4801 | 358 | DEBUG_puts("5_cupsSNMPRead: Returning NULL"); |
969307f0 | 359 | |
91c84a35 | 360 | return (NULL); |
969307f0 | 361 | } |
91c84a35 MS |
362 | |
363 | /* | |
364 | * Optionally wait for a response... | |
365 | */ | |
366 | ||
568fa3fa | 367 | if (timeout >= 0.0) |
91c84a35 MS |
368 | { |
369 | int ready; /* Data ready on socket? */ | |
370 | #ifdef HAVE_POLL | |
371 | struct pollfd pfd; /* Polled file descriptor */ | |
372 | ||
373 | pfd.fd = fd; | |
374 | pfd.events = POLLIN; | |
375 | ||
568fa3fa | 376 | while ((ready = poll(&pfd, 1, (int)(timeout * 1000.0))) < 0 && |
e07d4801 | 377 | (errno == EINTR || errno == EAGAIN)); |
91c84a35 MS |
378 | |
379 | #else | |
380 | fd_set input_set; /* select() input set */ | |
568fa3fa | 381 | struct timeval stimeout; /* select() timeout */ |
91c84a35 MS |
382 | |
383 | do | |
384 | { | |
385 | FD_ZERO(&input_set); | |
386 | FD_SET(fd, &input_set); | |
387 | ||
568fa3fa | 388 | stimeout.tv_sec = (int)timeout; |
536bc2c6 | 389 | stimeout.tv_usec = (int)((timeout - stimeout.tv_sec) * 1000000); |
91c84a35 | 390 | |
568fa3fa | 391 | ready = select(fd + 1, &input_set, NULL, NULL, &stimeout); |
91c84a35 MS |
392 | } |
393 | # ifdef WIN32 | |
394 | while (ready < 0 && WSAGetLastError() == WSAEINTR); | |
395 | # else | |
e07d4801 | 396 | while (ready < 0 && (errno == EINTR || errno == EAGAIN)); |
91c84a35 MS |
397 | # endif /* WIN32 */ |
398 | #endif /* HAVE_POLL */ | |
399 | ||
400 | /* | |
401 | * If we don't have any data ready, return right away... | |
402 | */ | |
403 | ||
404 | if (ready <= 0) | |
969307f0 | 405 | { |
e07d4801 | 406 | DEBUG_puts("5_cupsSNMPRead: Returning NULL (timeout)"); |
969307f0 | 407 | |
91c84a35 | 408 | return (NULL); |
969307f0 | 409 | } |
91c84a35 MS |
410 | } |
411 | ||
412 | /* | |
413 | * Read the response data... | |
414 | */ | |
415 | ||
ac884b6a | 416 | addrlen = sizeof(address); |
91c84a35 | 417 | |
ac884b6a MS |
418 | if ((bytes = recvfrom(fd, buffer, sizeof(buffer), 0, (void *)&address, |
419 | &addrlen)) < 0) | |
969307f0 | 420 | { |
e07d4801 | 421 | DEBUG_printf(("5_cupsSNMPRead: Returning NULL (%s)", strerror(errno))); |
969307f0 | 422 | |
91c84a35 | 423 | return (NULL); |
969307f0 | 424 | } |
91c84a35 MS |
425 | |
426 | /* | |
427 | * Look for the response status code in the SNMP message header... | |
428 | */ | |
429 | ||
7e86f2f6 | 430 | asn1_debug("DEBUG: IN ", buffer, (size_t)bytes, 0); |
91c84a35 | 431 | |
7e86f2f6 | 432 | asn1_decode_snmp(buffer, (size_t)bytes, packet); |
91c84a35 | 433 | |
ac884b6a MS |
434 | memcpy(&(packet->address), &address, sizeof(packet->address)); |
435 | ||
91c84a35 MS |
436 | /* |
437 | * Return decoded data packet... | |
438 | */ | |
439 | ||
e07d4801 | 440 | DEBUG_puts("5_cupsSNMPRead: Returning packet"); |
969307f0 | 441 | |
91c84a35 MS |
442 | return (packet); |
443 | } | |
444 | ||
445 | ||
446 | /* | |
7a14d768 | 447 | * '_cupsSNMPSetDebug()' - Enable/disable debug logging to stderr. |
91c84a35 MS |
448 | */ |
449 | ||
450 | void | |
7a14d768 | 451 | _cupsSNMPSetDebug(int level) /* I - 1 to enable debug output, 0 otherwise */ |
91c84a35 MS |
452 | { |
453 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
454 | ||
455 | ||
e07d4801 | 456 | DEBUG_printf(("4_cupsSNMPSetDebug(level=%d)", level)); |
969307f0 | 457 | |
91c84a35 MS |
458 | cg->snmp_debug = level; |
459 | } | |
460 | ||
461 | ||
20fbc903 MS |
462 | /* |
463 | * '_cupsSNMPStringToOID()' - Convert a numeric OID string to an OID array. | |
464 | * | |
465 | * This function converts a string of the form ".N.N.N.N.N" to the | |
466 | * corresponding OID array terminated by -1. | |
467 | * | |
468 | * @code NULL@ is returned if the array is not large enough or the string is | |
469 | * not a valid OID number. | |
20fbc903 MS |
470 | */ |
471 | ||
472 | int * /* O - Pointer to OID array or @code NULL@ on error */ | |
473 | _cupsSNMPStringToOID(const char *src, /* I - OID string */ | |
474 | int *dst, /* I - OID array */ | |
475 | int dstsize)/* I - Number of integers in OID array */ | |
476 | { | |
477 | int *dstptr, /* Pointer into OID array */ | |
478 | *dstend; /* End of OID array */ | |
479 | ||
480 | ||
e07d4801 | 481 | DEBUG_printf(("4_cupsSNMPStringToOID(src=\"%s\", dst=%p, dstsize=%d)", |
20fbc903 MS |
482 | src, dst, dstsize)); |
483 | ||
484 | /* | |
485 | * Range check input... | |
486 | */ | |
487 | ||
488 | if (!src || !dst || dstsize < 2) | |
489 | return (NULL); | |
490 | ||
491 | /* | |
492 | * Skip leading "."... | |
493 | */ | |
494 | ||
495 | if (*src == '.') | |
496 | src ++; | |
497 | ||
498 | /* | |
499 | * Loop to the end of the string... | |
500 | */ | |
501 | ||
502 | for (dstend = dst + dstsize - 1, dstptr = dst, *dstptr = 0; | |
503 | *src && dstptr < dstend; | |
504 | src ++) | |
505 | { | |
506 | if (*src == '.') | |
507 | { | |
508 | dstptr ++; | |
509 | *dstptr = 0; | |
510 | } | |
511 | else if (isdigit(*src & 255)) | |
512 | *dstptr = *dstptr * 10 + *src - '0'; | |
513 | else | |
514 | break; | |
515 | } | |
516 | ||
517 | if (*src) | |
518 | return (NULL); | |
519 | ||
520 | /* | |
521 | * Terminate the end of the OID array and return... | |
522 | */ | |
523 | ||
524 | dstptr[1] = -1; | |
525 | ||
526 | return (dst); | |
527 | } | |
528 | ||
529 | ||
ac884b6a | 530 | /* |
7a14d768 | 531 | * '_cupsSNMPWalk()' - Enumerate a group of OIDs. |
ac884b6a MS |
532 | * |
533 | * This function queries all of the OIDs with the specified OID prefix, | |
534 | * calling the "cb" function for every response that is received. | |
535 | * | |
536 | * The array pointed to by "prefix" is terminated by the value -1. | |
537 | * | |
7a14d768 | 538 | * If "timeout" is negative, @code _cupsSNMPWalk@ will wait for a response |
568fa3fa | 539 | * indefinitely. |
ac884b6a MS |
540 | */ |
541 | ||
542 | int /* O - Number of OIDs found or -1 on error */ | |
7a14d768 MS |
543 | _cupsSNMPWalk(int fd, /* I - SNMP socket */ |
544 | http_addr_t *address, /* I - Address to query */ | |
545 | int version, /* I - SNMP version */ | |
546 | const char *community,/* I - Community name */ | |
547 | const int *prefix, /* I - OID prefix */ | |
548 | double timeout, /* I - Timeout for each response in seconds */ | |
549 | cups_snmp_cb_t cb, /* I - Function to call for each response */ | |
550 | void *data) /* I - User data pointer that is passed to the callback function */ | |
ac884b6a MS |
551 | { |
552 | int count = 0; /* Number of OIDs found */ | |
7e86f2f6 | 553 | unsigned request_id = 0; /* Current request ID */ |
ac884b6a | 554 | cups_snmp_t packet; /* Current response packet */ |
18ecb428 MS |
555 | int lastoid[CUPS_SNMP_MAX_OID]; |
556 | /* Last OID we got */ | |
ac884b6a MS |
557 | |
558 | ||
559 | /* | |
560 | * Range check input... | |
561 | */ | |
562 | ||
e07d4801 MS |
563 | DEBUG_printf(("4_cupsSNMPWalk(fd=%d, address=%p, version=%d, " |
564 | "community=\"%s\", prefix=%p, timeout=%.1f, cb=%p, data=%p)", | |
565 | fd, address, version, community, prefix, timeout, cb, data)); | |
969307f0 | 566 | |
ac884b6a MS |
567 | if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community || |
568 | !prefix || !cb) | |
969307f0 | 569 | { |
e07d4801 | 570 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 571 | |
ac884b6a | 572 | return (-1); |
969307f0 | 573 | } |
ac884b6a MS |
574 | |
575 | /* | |
576 | * Copy the OID prefix and then loop until we have no more OIDs... | |
577 | */ | |
578 | ||
7a14d768 | 579 | _cupsSNMPCopyOID(packet.object_name, prefix, CUPS_SNMP_MAX_OID); |
18ecb428 | 580 | lastoid[0] = -1; |
ac884b6a MS |
581 | |
582 | for (;;) | |
583 | { | |
584 | request_id ++; | |
585 | ||
7a14d768 | 586 | if (!_cupsSNMPWrite(fd, address, version, community, |
18ecb428 MS |
587 | CUPS_ASN1_GET_NEXT_REQUEST, request_id, |
588 | packet.object_name)) | |
969307f0 | 589 | { |
e07d4801 | 590 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 591 | |
ac884b6a | 592 | return (-1); |
969307f0 | 593 | } |
ac884b6a | 594 | |
7a14d768 | 595 | if (!_cupsSNMPRead(fd, &packet, timeout)) |
969307f0 | 596 | { |
e07d4801 | 597 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 598 | |
ac884b6a | 599 | return (-1); |
969307f0 | 600 | } |
ac884b6a | 601 | |
18ecb428 MS |
602 | if (!_cupsSNMPIsOIDPrefixed(&packet, prefix) || |
603 | _cupsSNMPIsOID(&packet, lastoid)) | |
969307f0 | 604 | { |
e07d4801 | 605 | DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count)); |
969307f0 | 606 | |
ac884b6a | 607 | return (count); |
969307f0 | 608 | } |
ac884b6a MS |
609 | |
610 | if (packet.error || packet.error_status) | |
969307f0 | 611 | { |
e07d4801 | 612 | DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count > 0 ? count : -1)); |
969307f0 | 613 | |
ac884b6a | 614 | return (count > 0 ? count : -1); |
969307f0 | 615 | } |
ac884b6a | 616 | |
18ecb428 MS |
617 | _cupsSNMPCopyOID(lastoid, packet.object_name, CUPS_SNMP_MAX_OID); |
618 | ||
ac884b6a MS |
619 | count ++; |
620 | ||
621 | (*cb)(&packet, data); | |
622 | } | |
623 | } | |
624 | ||
625 | ||
91c84a35 | 626 | /* |
7a14d768 | 627 | * '_cupsSNMPWrite()' - Send an SNMP query packet. |
91c84a35 | 628 | * |
ac884b6a | 629 | * The array pointed to by "oid" is terminated by the value -1. |
91c84a35 MS |
630 | */ |
631 | ||
632 | int /* O - 1 on success, 0 on error */ | |
7a14d768 | 633 | _cupsSNMPWrite( |
91c84a35 MS |
634 | int fd, /* I - SNMP socket */ |
635 | http_addr_t *address, /* I - Address to send to */ | |
636 | int version, /* I - SNMP version */ | |
637 | const char *community, /* I - Community name */ | |
638 | cups_asn1_t request_type, /* I - Request type */ | |
639 | const unsigned request_id, /* I - Request ID */ | |
640 | const int *oid) /* I - OID */ | |
641 | { | |
642 | int i; /* Looping var */ | |
643 | cups_snmp_t packet; /* SNMP message packet */ | |
644 | unsigned char buffer[CUPS_SNMP_MAX_PACKET]; | |
645 | /* SNMP message buffer */ | |
7e86f2f6 | 646 | ssize_t bytes; /* Size of message */ |
1ff0402e | 647 | http_addr_t temp; /* Copy of address */ |
91c84a35 MS |
648 | |
649 | ||
ac884b6a MS |
650 | /* |
651 | * Range check input... | |
652 | */ | |
653 | ||
e07d4801 MS |
654 | DEBUG_printf(("4_cupsSNMPWrite(fd=%d, address=%p, version=%d, " |
655 | "community=\"%s\", request_type=%d, request_id=%u, oid=%p)", | |
656 | fd, address, version, community, request_type, request_id, oid)); | |
969307f0 | 657 | |
ac884b6a MS |
658 | if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community || |
659 | (request_type != CUPS_ASN1_GET_REQUEST && | |
660 | request_type != CUPS_ASN1_GET_NEXT_REQUEST) || request_id < 1 || !oid) | |
969307f0 | 661 | { |
e07d4801 | 662 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (bad arguments)"); |
969307f0 | 663 | |
ac884b6a | 664 | return (0); |
969307f0 | 665 | } |
ac884b6a | 666 | |
91c84a35 MS |
667 | /* |
668 | * Create the SNMP message... | |
669 | */ | |
670 | ||
671 | memset(&packet, 0, sizeof(packet)); | |
672 | ||
673 | packet.version = version; | |
674 | packet.request_type = request_type; | |
675 | packet.request_id = request_id; | |
676 | packet.object_type = CUPS_ASN1_NULL_VALUE; | |
88f9aafc | 677 | |
91c84a35 MS |
678 | strlcpy(packet.community, community, sizeof(packet.community)); |
679 | ||
ac884b6a | 680 | for (i = 0; oid[i] >= 0 && i < (CUPS_SNMP_MAX_OID - 1); i ++) |
91c84a35 | 681 | packet.object_name[i] = oid[i]; |
ac884b6a MS |
682 | packet.object_name[i] = -1; |
683 | ||
684 | if (oid[i] >= 0) | |
685 | { | |
e07d4801 | 686 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (OID too big)"); |
969307f0 | 687 | |
ac884b6a MS |
688 | errno = E2BIG; |
689 | return (0); | |
690 | } | |
91c84a35 MS |
691 | |
692 | bytes = asn1_encode_snmp(buffer, sizeof(buffer), &packet); | |
693 | ||
694 | if (bytes < 0) | |
695 | { | |
e07d4801 | 696 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (request too big)"); |
969307f0 | 697 | |
91c84a35 | 698 | errno = E2BIG; |
91c84a35 MS |
699 | return (0); |
700 | } | |
701 | ||
7e86f2f6 | 702 | asn1_debug("DEBUG: OUT ", buffer, (size_t)bytes, 0); |
91c84a35 MS |
703 | |
704 | /* | |
705 | * Send the message... | |
706 | */ | |
707 | ||
1ff0402e MS |
708 | temp = *address; |
709 | ||
22c9029b | 710 | _httpAddrSetPort(&temp, CUPS_SNMP_PORT); |
91c84a35 | 711 | |
7e86f2f6 | 712 | return (sendto(fd, buffer, (size_t)bytes, 0, (void *)&temp, (socklen_t)httpAddrLength(&temp)) == bytes); |
91c84a35 MS |
713 | } |
714 | ||
715 | ||
ac884b6a MS |
716 | /* |
717 | * 'asn1_debug()' - Decode an ASN1-encoded message. | |
718 | */ | |
719 | ||
720 | static void | |
721 | asn1_debug(const char *prefix, /* I - Prefix string */ | |
722 | unsigned char *buffer, /* I - Buffer */ | |
723 | size_t len, /* I - Length of buffer */ | |
724 | int indent) /* I - Indentation */ | |
725 | { | |
7e86f2f6 | 726 | size_t i; /* Looping var */ |
ac884b6a MS |
727 | unsigned char *bufend; /* End of buffer */ |
728 | int integer; /* Number value */ | |
729 | int oid[CUPS_SNMP_MAX_OID]; /* OID value */ | |
730 | char string[CUPS_SNMP_MAX_STRING]; | |
731 | /* String value */ | |
732 | unsigned char value_type; /* Type of value */ | |
7e86f2f6 | 733 | unsigned value_length; /* Length of value */ |
ac884b6a MS |
734 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ |
735 | ||
736 | ||
7f500d89 MS |
737 | #ifdef __clang_analyzer__ /* Suppress bogus clang error */ |
738 | memset(string, 0, sizeof(string)); | |
739 | #endif /* __clang_analyzer__ */ | |
740 | ||
ac884b6a MS |
741 | if (cg->snmp_debug <= 0) |
742 | return; | |
743 | ||
744 | if (cg->snmp_debug > 1 && indent == 0) | |
745 | { | |
746 | /* | |
747 | * Do a hex dump of the packet... | |
748 | */ | |
749 | ||
7e86f2f6 | 750 | size_t j; |
ac884b6a MS |
751 | |
752 | fprintf(stderr, "%sHex Dump (%d bytes):\n", prefix, (int)len); | |
753 | ||
7e86f2f6 | 754 | for (i = 0; i < len; i += 16) |
ac884b6a | 755 | { |
7e86f2f6 | 756 | fprintf(stderr, "%s%04x:", prefix, (unsigned)i); |
ac884b6a | 757 | |
7e86f2f6 | 758 | for (j = 0; j < 16 && (i + j) < len; j ++) |
ac884b6a MS |
759 | { |
760 | if (j && !(j & 3)) | |
761 | fprintf(stderr, " %02x", buffer[i + j]); | |
762 | else | |
763 | fprintf(stderr, " %02x", buffer[i + j]); | |
764 | } | |
765 | ||
766 | while (j < 16) | |
767 | { | |
768 | if (j && !(j & 3)) | |
769 | fputs(" ", stderr); | |
770 | else | |
771 | fputs(" ", stderr); | |
772 | ||
773 | j ++; | |
774 | } | |
775 | ||
776 | fputs(" ", stderr); | |
777 | ||
7e86f2f6 | 778 | for (j = 0; j < 16 && (i + j) < len; j ++) |
ac884b6a MS |
779 | if (buffer[i + j] < ' ' || buffer[i + j] >= 0x7f) |
780 | putc('.', stderr); | |
781 | else | |
782 | putc(buffer[i + j], stderr); | |
783 | ||
784 | putc('\n', stderr); | |
785 | } | |
786 | } | |
787 | ||
788 | if (indent == 0) | |
789 | fprintf(stderr, "%sMessage:\n", prefix); | |
790 | ||
791 | bufend = buffer + len; | |
792 | ||
793 | while (buffer < bufend) | |
794 | { | |
795 | /* | |
796 | * Get value type... | |
797 | */ | |
798 | ||
7e86f2f6 | 799 | value_type = (unsigned char)asn1_get_type(&buffer, bufend); |
ac884b6a MS |
800 | value_length = asn1_get_length(&buffer, bufend); |
801 | ||
802 | switch (value_type) | |
803 | { | |
804 | case CUPS_ASN1_BOOLEAN : | |
805 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
806 | ||
807 | fprintf(stderr, "%s%*sBOOLEAN %d bytes %d\n", prefix, indent, "", | |
808 | value_length, integer); | |
809 | break; | |
810 | ||
811 | case CUPS_ASN1_INTEGER : | |
812 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
813 | ||
814 | fprintf(stderr, "%s%*sINTEGER %d bytes %d\n", prefix, indent, "", | |
815 | value_length, integer); | |
816 | break; | |
817 | ||
818 | case CUPS_ASN1_COUNTER : | |
819 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
820 | ||
821 | fprintf(stderr, "%s%*sCOUNTER %d bytes %u\n", prefix, indent, "", | |
822 | value_length, (unsigned)integer); | |
823 | break; | |
824 | ||
825 | case CUPS_ASN1_GAUGE : | |
826 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
827 | ||
828 | fprintf(stderr, "%s%*sGAUGE %d bytes %u\n", prefix, indent, "", | |
829 | value_length, (unsigned)integer); | |
830 | break; | |
831 | ||
832 | case CUPS_ASN1_TIMETICKS : | |
833 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
834 | ||
835 | fprintf(stderr, "%s%*sTIMETICKS %d bytes %u\n", prefix, indent, "", | |
836 | value_length, (unsigned)integer); | |
837 | break; | |
838 | ||
839 | case CUPS_ASN1_OCTET_STRING : | |
840 | fprintf(stderr, "%s%*sOCTET STRING %d bytes \"%s\"\n", prefix, | |
841 | indent, "", value_length, | |
842 | asn1_get_string(&buffer, bufend, value_length, string, | |
843 | sizeof(string))); | |
844 | break; | |
845 | ||
846 | case CUPS_ASN1_HEX_STRING : | |
847 | asn1_get_string(&buffer, bufend, value_length, string, | |
848 | sizeof(string)); | |
849 | fprintf(stderr, "%s%*sHex-STRING %d bytes", prefix, | |
850 | indent, "", value_length); | |
851 | for (i = 0; i < value_length; i ++) | |
852 | fprintf(stderr, " %02X", string[i] & 255); | |
853 | putc('\n', stderr); | |
854 | break; | |
855 | ||
856 | case CUPS_ASN1_NULL_VALUE : | |
857 | fprintf(stderr, "%s%*sNULL VALUE %d bytes\n", prefix, indent, "", | |
858 | value_length); | |
859 | ||
860 | buffer += value_length; | |
861 | break; | |
862 | ||
863 | case CUPS_ASN1_OID : | |
864 | integer = asn1_get_oid(&buffer, bufend, value_length, oid, | |
865 | CUPS_SNMP_MAX_OID); | |
866 | ||
867 | fprintf(stderr, "%s%*sOID %d bytes ", prefix, indent, "", | |
868 | value_length); | |
7e86f2f6 | 869 | for (i = 0; i < (unsigned)integer; i ++) |
ac884b6a MS |
870 | fprintf(stderr, ".%d", oid[i]); |
871 | putc('\n', stderr); | |
872 | break; | |
873 | ||
874 | case CUPS_ASN1_SEQUENCE : | |
875 | fprintf(stderr, "%s%*sSEQUENCE %d bytes\n", prefix, indent, "", | |
876 | value_length); | |
877 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
878 | ||
879 | buffer += value_length; | |
880 | break; | |
881 | ||
882 | case CUPS_ASN1_GET_NEXT_REQUEST : | |
883 | fprintf(stderr, "%s%*sGet-Next-Request-PDU %d bytes\n", prefix, | |
884 | indent, "", value_length); | |
885 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
886 | ||
887 | buffer += value_length; | |
888 | break; | |
889 | ||
890 | case CUPS_ASN1_GET_REQUEST : | |
891 | fprintf(stderr, "%s%*sGet-Request-PDU %d bytes\n", prefix, indent, "", | |
892 | value_length); | |
893 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
894 | ||
895 | buffer += value_length; | |
896 | break; | |
897 | ||
898 | case CUPS_ASN1_GET_RESPONSE : | |
899 | fprintf(stderr, "%s%*sGet-Response-PDU %d bytes\n", prefix, indent, | |
900 | "", value_length); | |
901 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
902 | ||
903 | buffer += value_length; | |
904 | break; | |
905 | ||
906 | default : | |
907 | fprintf(stderr, "%s%*sUNKNOWN(%x) %d bytes\n", prefix, indent, "", | |
908 | value_type, value_length); | |
909 | ||
910 | buffer += value_length; | |
911 | break; | |
912 | } | |
913 | } | |
914 | } | |
88f9aafc | 915 | |
ac884b6a | 916 | |
91c84a35 MS |
917 | /* |
918 | * 'asn1_decode_snmp()' - Decode a SNMP packet. | |
919 | */ | |
920 | ||
921 | static int /* O - 0 on success, -1 on error */ | |
922 | asn1_decode_snmp(unsigned char *buffer, /* I - Buffer */ | |
923 | size_t len, /* I - Size of buffer */ | |
924 | cups_snmp_t *packet) /* I - SNMP packet */ | |
925 | { | |
926 | unsigned char *bufptr, /* Pointer into the data */ | |
927 | *bufend; /* End of data */ | |
7e86f2f6 | 928 | unsigned length; /* Length of value */ |
91c84a35 MS |
929 | |
930 | ||
931 | /* | |
932 | * Initialize the decoding... | |
933 | */ | |
934 | ||
935 | memset(packet, 0, sizeof(cups_snmp_t)); | |
ac884b6a | 936 | packet->object_name[0] = -1; |
91c84a35 MS |
937 | |
938 | bufptr = buffer; | |
939 | bufend = buffer + len; | |
940 | ||
941 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
942 | snmp_set_error(packet, _("Packet does not start with SEQUENCE")); | |
943 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
944 | snmp_set_error(packet, _("SEQUENCE uses indefinite length")); | |
945 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
946 | snmp_set_error(packet, _("No version number")); | |
947 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
948 | snmp_set_error(packet, _("Version uses indefinite length")); | |
949 | else if ((packet->version = asn1_get_integer(&bufptr, bufend, length)) | |
950 | != CUPS_SNMP_VERSION_1) | |
951 | snmp_set_error(packet, _("Bad SNMP version number")); | |
952 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_OCTET_STRING) | |
953 | snmp_set_error(packet, _("No community name")); | |
954 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
955 | snmp_set_error(packet, _("Community name uses indefinite length")); | |
956 | else | |
957 | { | |
958 | asn1_get_string(&bufptr, bufend, length, packet->community, | |
959 | sizeof(packet->community)); | |
960 | ||
7e86f2f6 | 961 | if ((packet->request_type = (cups_asn1_t)asn1_get_type(&bufptr, bufend)) |
91c84a35 MS |
962 | != CUPS_ASN1_GET_RESPONSE) |
963 | snmp_set_error(packet, _("Packet does not contain a Get-Response-PDU")); | |
964 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
965 | snmp_set_error(packet, _("Get-Response-PDU uses indefinite length")); | |
966 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
967 | snmp_set_error(packet, _("No request-id")); | |
968 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
969 | snmp_set_error(packet, _("request-id uses indefinite length")); | |
970 | else | |
971 | { | |
7e86f2f6 | 972 | packet->request_id = (unsigned)asn1_get_integer(&bufptr, bufend, length); |
91c84a35 MS |
973 | |
974 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
975 | snmp_set_error(packet, _("No error-status")); | |
976 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
977 | snmp_set_error(packet, _("error-status uses indefinite length")); | |
978 | else | |
979 | { | |
980 | packet->error_status = asn1_get_integer(&bufptr, bufend, length); | |
981 | ||
982 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
983 | snmp_set_error(packet, _("No error-index")); | |
984 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
985 | snmp_set_error(packet, _("error-index uses indefinite length")); | |
986 | else | |
987 | { | |
988 | packet->error_index = asn1_get_integer(&bufptr, bufend, length); | |
989 | ||
990 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
991 | snmp_set_error(packet, _("No variable-bindings SEQUENCE")); | |
992 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
993 | snmp_set_error(packet, | |
994 | _("variable-bindings uses indefinite length")); | |
995 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
996 | snmp_set_error(packet, _("No VarBind SEQUENCE")); | |
997 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
998 | snmp_set_error(packet, _("VarBind uses indefinite length")); | |
999 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_OID) | |
1000 | snmp_set_error(packet, _("No name OID")); | |
1001 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1002 | snmp_set_error(packet, _("Name OID uses indefinite length")); | |
1003 | else | |
1004 | { | |
1005 | asn1_get_oid(&bufptr, bufend, length, packet->object_name, | |
1006 | CUPS_SNMP_MAX_OID); | |
1007 | ||
7e86f2f6 | 1008 | packet->object_type = (cups_asn1_t)asn1_get_type(&bufptr, bufend); |
91c84a35 MS |
1009 | |
1010 | if ((length = asn1_get_length(&bufptr, bufend)) == 0 && | |
1011 | packet->object_type != CUPS_ASN1_NULL_VALUE && | |
1012 | packet->object_type != CUPS_ASN1_OCTET_STRING) | |
1013 | snmp_set_error(packet, _("Value uses indefinite length")); | |
1014 | else | |
1015 | { | |
1016 | switch (packet->object_type) | |
1017 | { | |
1018 | case CUPS_ASN1_BOOLEAN : | |
1019 | packet->object_value.boolean = | |
1020 | asn1_get_integer(&bufptr, bufend, length); | |
1021 | break; | |
1022 | ||
1023 | case CUPS_ASN1_INTEGER : | |
1024 | packet->object_value.integer = | |
1025 | asn1_get_integer(&bufptr, bufend, length); | |
1026 | break; | |
1027 | ||
1028 | case CUPS_ASN1_NULL_VALUE : | |
1029 | break; | |
1030 | ||
1031 | case CUPS_ASN1_OCTET_STRING : | |
d1c13e16 MS |
1032 | case CUPS_ASN1_BIT_STRING : |
1033 | case CUPS_ASN1_HEX_STRING : | |
1034 | packet->object_value.string.num_bytes = length; | |
91c84a35 | 1035 | asn1_get_string(&bufptr, bufend, length, |
d1c13e16 | 1036 | (char *)packet->object_value.string.bytes, |
f3c17241 | 1037 | sizeof(packet->object_value.string.bytes)); |
91c84a35 MS |
1038 | break; |
1039 | ||
1040 | case CUPS_ASN1_OID : | |
1041 | asn1_get_oid(&bufptr, bufend, length, | |
1042 | packet->object_value.oid, CUPS_SNMP_MAX_OID); | |
1043 | break; | |
1044 | ||
1045 | case CUPS_ASN1_COUNTER : | |
1046 | packet->object_value.counter = | |
1047 | asn1_get_integer(&bufptr, bufend, length); | |
1048 | break; | |
1049 | ||
1050 | case CUPS_ASN1_GAUGE : | |
1051 | packet->object_value.gauge = | |
7e86f2f6 | 1052 | (unsigned)asn1_get_integer(&bufptr, bufend, length); |
91c84a35 MS |
1053 | break; |
1054 | ||
ac884b6a MS |
1055 | case CUPS_ASN1_TIMETICKS : |
1056 | packet->object_value.timeticks = | |
7e86f2f6 | 1057 | (unsigned)asn1_get_integer(&bufptr, bufend, length); |
ac884b6a MS |
1058 | break; |
1059 | ||
91c84a35 MS |
1060 | default : |
1061 | snmp_set_error(packet, _("Unsupported value type")); | |
1062 | break; | |
1063 | } | |
1064 | } | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | return (packet->error ? -1 : 0); | |
1072 | } | |
1073 | ||
1074 | ||
91c84a35 MS |
1075 | /* |
1076 | * 'asn1_encode_snmp()' - Encode a SNMP packet. | |
1077 | */ | |
1078 | ||
1079 | static int /* O - Length on success, -1 on error */ | |
1080 | asn1_encode_snmp(unsigned char *buffer, /* I - Buffer */ | |
1081 | size_t bufsize, /* I - Size of buffer */ | |
1082 | cups_snmp_t *packet) /* I - SNMP packet */ | |
1083 | { | |
1084 | unsigned char *bufptr; /* Pointer into buffer */ | |
7e86f2f6 | 1085 | unsigned total, /* Total length */ |
91c84a35 MS |
1086 | msglen, /* Length of entire message */ |
1087 | commlen, /* Length of community string */ | |
1088 | reqlen, /* Length of request */ | |
1089 | listlen, /* Length of variable list */ | |
1090 | varlen, /* Length of variable */ | |
1091 | namelen, /* Length of object name OID */ | |
1092 | valuelen; /* Length of object value */ | |
1093 | ||
1094 | ||
1095 | /* | |
1096 | * Get the lengths of the community string, OID, and message... | |
1097 | */ | |
1098 | ||
ac884b6a | 1099 | |
91c84a35 MS |
1100 | namelen = asn1_size_oid(packet->object_name); |
1101 | ||
1102 | switch (packet->object_type) | |
1103 | { | |
1104 | case CUPS_ASN1_NULL_VALUE : | |
1105 | valuelen = 0; | |
1106 | break; | |
1107 | ||
1108 | case CUPS_ASN1_BOOLEAN : | |
1109 | valuelen = asn1_size_integer(packet->object_value.boolean); | |
1110 | break; | |
1111 | ||
1112 | case CUPS_ASN1_INTEGER : | |
1113 | valuelen = asn1_size_integer(packet->object_value.integer); | |
1114 | break; | |
1115 | ||
1116 | case CUPS_ASN1_OCTET_STRING : | |
d1c13e16 | 1117 | valuelen = packet->object_value.string.num_bytes; |
91c84a35 MS |
1118 | break; |
1119 | ||
1120 | case CUPS_ASN1_OID : | |
1121 | valuelen = asn1_size_oid(packet->object_value.oid); | |
1122 | break; | |
1123 | ||
1124 | default : | |
1125 | packet->error = "Unknown object type"; | |
1126 | return (-1); | |
1127 | } | |
1128 | ||
1129 | varlen = 1 + asn1_size_length(namelen) + namelen + | |
1130 | 1 + asn1_size_length(valuelen) + valuelen; | |
1131 | listlen = 1 + asn1_size_length(varlen) + varlen; | |
7e86f2f6 | 1132 | reqlen = 2 + asn1_size_integer((int)packet->request_id) + |
91c84a35 MS |
1133 | 2 + asn1_size_integer(packet->error_status) + |
1134 | 2 + asn1_size_integer(packet->error_index) + | |
1135 | 1 + asn1_size_length(listlen) + listlen; | |
7e86f2f6 | 1136 | commlen = (unsigned)strlen(packet->community); |
91c84a35 MS |
1137 | msglen = 2 + asn1_size_integer(packet->version) + |
1138 | 1 + asn1_size_length(commlen) + commlen + | |
1139 | 1 + asn1_size_length(reqlen) + reqlen; | |
1140 | total = 1 + asn1_size_length(msglen) + msglen; | |
1141 | ||
7e86f2f6 | 1142 | if (total > bufsize) |
91c84a35 MS |
1143 | { |
1144 | packet->error = "Message too large for buffer"; | |
1145 | return (-1); | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Then format the message... | |
1150 | */ | |
1151 | ||
1152 | bufptr = buffer; | |
1153 | ||
1154 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* SNMPv1 message header */ | |
1155 | asn1_set_length(&bufptr, msglen); | |
1156 | ||
1157 | asn1_set_integer(&bufptr, packet->version); | |
1158 | /* version */ | |
1159 | ||
1160 | *bufptr++ = CUPS_ASN1_OCTET_STRING; /* community */ | |
1161 | asn1_set_length(&bufptr, commlen); | |
1162 | memcpy(bufptr, packet->community, commlen); | |
1163 | bufptr += commlen; | |
1164 | ||
ac884b6a | 1165 | *bufptr++ = packet->request_type; /* Get-Request-PDU/Get-Next-Request-PDU */ |
91c84a35 MS |
1166 | asn1_set_length(&bufptr, reqlen); |
1167 | ||
7e86f2f6 | 1168 | asn1_set_integer(&bufptr, (int)packet->request_id); |
91c84a35 MS |
1169 | |
1170 | asn1_set_integer(&bufptr, packet->error_status); | |
1171 | ||
1172 | asn1_set_integer(&bufptr, packet->error_index); | |
1173 | ||
1174 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* variable-bindings */ | |
1175 | asn1_set_length(&bufptr, listlen); | |
1176 | ||
1177 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* variable */ | |
1178 | asn1_set_length(&bufptr, varlen); | |
1179 | ||
1180 | asn1_set_oid(&bufptr, packet->object_name); | |
1181 | /* ObjectName */ | |
1182 | ||
1183 | switch (packet->object_type) | |
1184 | { | |
1185 | case CUPS_ASN1_NULL_VALUE : | |
1186 | *bufptr++ = CUPS_ASN1_NULL_VALUE; | |
1187 | /* ObjectValue */ | |
1188 | *bufptr++ = 0; /* Length */ | |
1189 | break; | |
1190 | ||
1191 | case CUPS_ASN1_BOOLEAN : | |
1192 | asn1_set_integer(&bufptr, packet->object_value.boolean); | |
1193 | break; | |
1194 | ||
1195 | case CUPS_ASN1_INTEGER : | |
1196 | asn1_set_integer(&bufptr, packet->object_value.integer); | |
1197 | break; | |
1198 | ||
1199 | case CUPS_ASN1_OCTET_STRING : | |
1200 | *bufptr++ = CUPS_ASN1_OCTET_STRING; | |
1201 | asn1_set_length(&bufptr, valuelen); | |
d1c13e16 | 1202 | memcpy(bufptr, packet->object_value.string.bytes, valuelen); |
91c84a35 MS |
1203 | bufptr += valuelen; |
1204 | break; | |
1205 | ||
1206 | case CUPS_ASN1_OID : | |
1207 | asn1_set_oid(&bufptr, packet->object_value.oid); | |
1208 | break; | |
1209 | ||
1210 | default : | |
1211 | break; | |
1212 | } | |
1213 | ||
7e86f2f6 | 1214 | return ((int)(bufptr - buffer)); |
91c84a35 MS |
1215 | } |
1216 | ||
1217 | ||
1218 | /* | |
1219 | * 'asn1_get_integer()' - Get an integer value. | |
1220 | */ | |
1221 | ||
1222 | static int /* O - Integer value */ | |
1223 | asn1_get_integer( | |
1224 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1225 | unsigned char *bufend, /* I - End of buffer */ | |
7e86f2f6 | 1226 | unsigned length) /* I - Length of value */ |
91c84a35 MS |
1227 | { |
1228 | int value; /* Integer value */ | |
1229 | ||
1230 | ||
41681883 MS |
1231 | if (length > sizeof(int)) |
1232 | { | |
1233 | (*buffer) += length; | |
1234 | return (0); | |
1235 | } | |
1236 | ||
18ecb428 | 1237 | for (value = (**buffer & 0x80) ? -1 : 0; |
91c84a35 MS |
1238 | length > 0 && *buffer < bufend; |
1239 | length --, (*buffer) ++) | |
1240 | value = (value << 8) | **buffer; | |
1241 | ||
1242 | return (value); | |
1243 | } | |
1244 | ||
1245 | ||
1246 | /* | |
1247 | * 'asn1_get_length()' - Get a value length. | |
1248 | */ | |
1249 | ||
41681883 | 1250 | static unsigned /* O - Length */ |
91c84a35 MS |
1251 | asn1_get_length(unsigned char **buffer, /* IO - Pointer in buffer */ |
1252 | unsigned char *bufend) /* I - End of buffer */ | |
1253 | { | |
41681883 | 1254 | unsigned length; /* Length */ |
91c84a35 MS |
1255 | |
1256 | ||
1257 | length = **buffer; | |
1258 | (*buffer) ++; | |
1259 | ||
1260 | if (length & 128) | |
41681883 MS |
1261 | { |
1262 | int count; /* Number of bytes for length */ | |
1263 | ||
1264 | ||
1265 | if ((count = length & 127) > sizeof(unsigned)) | |
1266 | { | |
1267 | (*buffer) += count; | |
1268 | return (0); | |
1269 | } | |
1270 | ||
1271 | for (length = 0; | |
1272 | count > 0 && *buffer < bufend; | |
1273 | count --, (*buffer) ++) | |
1274 | length = (length << 8) | **buffer; | |
1275 | } | |
91c84a35 MS |
1276 | |
1277 | return (length); | |
1278 | } | |
1279 | ||
1280 | ||
1281 | /* | |
1282 | * 'asn1_get_oid()' - Get an OID value. | |
1283 | */ | |
1284 | ||
ac884b6a | 1285 | static int /* O - Number of OIDs */ |
91c84a35 MS |
1286 | asn1_get_oid( |
1287 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1288 | unsigned char *bufend, /* I - End of buffer */ | |
7e86f2f6 | 1289 | unsigned length, /* I - Length of value */ |
91c84a35 MS |
1290 | int *oid, /* I - OID buffer */ |
1291 | int oidsize) /* I - Size of OID buffer */ | |
1292 | { | |
1293 | unsigned char *valend; /* End of value */ | |
ac884b6a MS |
1294 | int *oidptr, /* Current OID */ |
1295 | *oidend; /* End of OID buffer */ | |
91c84a35 MS |
1296 | int number; /* OID number */ |
1297 | ||
1298 | ||
1299 | valend = *buffer + length; | |
ac884b6a | 1300 | oidptr = oid; |
91c84a35 MS |
1301 | oidend = oid + oidsize - 1; |
1302 | ||
1303 | if (valend > bufend) | |
1304 | valend = bufend; | |
1305 | ||
1306 | number = asn1_get_packed(buffer, bufend); | |
1307 | ||
1308 | if (number < 80) | |
1309 | { | |
ac884b6a MS |
1310 | *oidptr++ = number / 40; |
1311 | number = number % 40; | |
1312 | *oidptr++ = number; | |
91c84a35 MS |
1313 | } |
1314 | else | |
1315 | { | |
ac884b6a MS |
1316 | *oidptr++ = 2; |
1317 | number -= 80; | |
1318 | *oidptr++ = number; | |
91c84a35 MS |
1319 | } |
1320 | ||
1321 | while (*buffer < valend) | |
1322 | { | |
1323 | number = asn1_get_packed(buffer, bufend); | |
1324 | ||
ac884b6a MS |
1325 | if (oidptr < oidend) |
1326 | *oidptr++ = number; | |
91c84a35 MS |
1327 | } |
1328 | ||
ac884b6a | 1329 | *oidptr = -1; |
91c84a35 | 1330 | |
7e86f2f6 | 1331 | return ((int)(oidptr - oid)); |
91c84a35 MS |
1332 | } |
1333 | ||
1334 | ||
1335 | /* | |
1336 | * 'asn1_get_packed()' - Get a packed integer value. | |
1337 | */ | |
1338 | ||
1339 | static int /* O - Value */ | |
1340 | asn1_get_packed( | |
1341 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1342 | unsigned char *bufend) /* I - End of buffer */ | |
1343 | { | |
1344 | int value; /* Value */ | |
1345 | ||
1346 | ||
1347 | value = 0; | |
1348 | ||
1349 | while ((**buffer & 128) && *buffer < bufend) | |
1350 | { | |
1351 | value = (value << 7) | (**buffer & 127); | |
1352 | (*buffer) ++; | |
1353 | } | |
1354 | ||
1355 | if (*buffer < bufend) | |
1356 | { | |
1357 | value = (value << 7) | **buffer; | |
1358 | (*buffer) ++; | |
1359 | } | |
1360 | ||
1361 | return (value); | |
1362 | } | |
1363 | ||
1364 | ||
1365 | /* | |
1366 | * 'asn1_get_string()' - Get a string value. | |
1367 | */ | |
1368 | ||
1369 | static char * /* O - String */ | |
1370 | asn1_get_string( | |
1371 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1372 | unsigned char *bufend, /* I - End of buffer */ | |
7e86f2f6 | 1373 | unsigned length, /* I - Value length */ |
91c84a35 | 1374 | char *string, /* I - String buffer */ |
7e86f2f6 | 1375 | size_t strsize) /* I - String buffer size */ |
91c84a35 | 1376 | { |
7e86f2f6 MS |
1377 | if (length > (unsigned)(bufend - *buffer)) |
1378 | length = (unsigned)(bufend - *buffer); | |
91c84a35 | 1379 | |
7e86f2f6 | 1380 | if (length < strsize) |
91c84a35 MS |
1381 | { |
1382 | /* | |
1383 | * String is smaller than the buffer... | |
1384 | */ | |
1385 | ||
1386 | if (length > 0) | |
1387 | memcpy(string, *buffer, length); | |
1388 | ||
1389 | string[length] = '\0'; | |
1390 | } | |
1391 | else | |
1392 | { | |
1393 | /* | |
1394 | * String is larger than the buffer... | |
1395 | */ | |
1396 | ||
1397 | memcpy(string, *buffer, strsize - 1); | |
1398 | string[strsize - 1] = '\0'; | |
1399 | } | |
1400 | ||
1401 | if (length > 0) | |
1402 | (*buffer) += length; | |
1403 | ||
7e86f2f6 | 1404 | return (string); |
91c84a35 MS |
1405 | } |
1406 | ||
1407 | ||
1408 | /* | |
1409 | * 'asn1_get_type()' - Get a value type. | |
1410 | */ | |
1411 | ||
1412 | static int /* O - Type */ | |
1413 | asn1_get_type(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1414 | unsigned char *bufend) /* I - End of buffer */ | |
1415 | { | |
1416 | int type; /* Type */ | |
1417 | ||
1418 | ||
1419 | type = **buffer; | |
1420 | (*buffer) ++; | |
1421 | ||
1422 | if ((type & 31) == 31) | |
1423 | type = asn1_get_packed(buffer, bufend); | |
1424 | ||
1425 | return (type); | |
1426 | } | |
1427 | ||
1428 | ||
1429 | /* | |
1430 | * 'asn1_set_integer()' - Set an integer value. | |
1431 | */ | |
1432 | ||
1433 | static void | |
1434 | asn1_set_integer(unsigned char **buffer,/* IO - Pointer in buffer */ | |
1435 | int integer) /* I - Integer value */ | |
1436 | { | |
1437 | **buffer = CUPS_ASN1_INTEGER; | |
1438 | (*buffer) ++; | |
1439 | ||
1440 | if (integer > 0x7fffff || integer < -0x800000) | |
1441 | { | |
1442 | **buffer = 4; | |
1443 | (*buffer) ++; | |
7e86f2f6 | 1444 | **buffer = (unsigned char)(integer >> 24); |
91c84a35 | 1445 | (*buffer) ++; |
7e86f2f6 | 1446 | **buffer = (unsigned char)(integer >> 16); |
91c84a35 | 1447 | (*buffer) ++; |
7e86f2f6 | 1448 | **buffer = (unsigned char)(integer >> 8); |
91c84a35 | 1449 | (*buffer) ++; |
7e86f2f6 | 1450 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1451 | (*buffer) ++; |
1452 | } | |
1453 | else if (integer > 0x7fff || integer < -0x8000) | |
1454 | { | |
1455 | **buffer = 3; | |
1456 | (*buffer) ++; | |
7e86f2f6 | 1457 | **buffer = (unsigned char)(integer >> 16); |
91c84a35 | 1458 | (*buffer) ++; |
7e86f2f6 | 1459 | **buffer = (unsigned char)(integer >> 8); |
91c84a35 | 1460 | (*buffer) ++; |
7e86f2f6 | 1461 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1462 | (*buffer) ++; |
1463 | } | |
1464 | else if (integer > 0x7f || integer < -0x80) | |
1465 | { | |
1466 | **buffer = 2; | |
1467 | (*buffer) ++; | |
7e86f2f6 | 1468 | **buffer = (unsigned char)(integer >> 8); |
91c84a35 | 1469 | (*buffer) ++; |
7e86f2f6 | 1470 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1471 | (*buffer) ++; |
1472 | } | |
1473 | else | |
1474 | { | |
1475 | **buffer = 1; | |
1476 | (*buffer) ++; | |
7e86f2f6 | 1477 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1478 | (*buffer) ++; |
1479 | } | |
1480 | } | |
1481 | ||
1482 | ||
1483 | /* | |
1484 | * 'asn1_set_length()' - Set a value length. | |
1485 | */ | |
1486 | ||
1487 | static void | |
1488 | asn1_set_length(unsigned char **buffer, /* IO - Pointer in buffer */ | |
41681883 | 1489 | unsigned length) /* I - Length value */ |
91c84a35 MS |
1490 | { |
1491 | if (length > 255) | |
1492 | { | |
1493 | **buffer = 0x82; /* 2-byte length */ | |
1494 | (*buffer) ++; | |
7e86f2f6 | 1495 | **buffer = (unsigned char)(length >> 8); |
91c84a35 | 1496 | (*buffer) ++; |
7e86f2f6 | 1497 | **buffer = (unsigned char)length; |
91c84a35 MS |
1498 | (*buffer) ++; |
1499 | } | |
1500 | else if (length > 127) | |
1501 | { | |
1502 | **buffer = 0x81; /* 1-byte length */ | |
1503 | (*buffer) ++; | |
7e86f2f6 | 1504 | **buffer = (unsigned char)length; |
91c84a35 MS |
1505 | (*buffer) ++; |
1506 | } | |
1507 | else | |
1508 | { | |
7e86f2f6 | 1509 | **buffer = (unsigned char)length; /* Length */ |
91c84a35 MS |
1510 | (*buffer) ++; |
1511 | } | |
1512 | } | |
1513 | ||
1514 | ||
1515 | /* | |
1516 | * 'asn1_set_oid()' - Set an OID value. | |
1517 | */ | |
1518 | ||
1519 | static void | |
1520 | asn1_set_oid(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1521 | const int *oid) /* I - OID value */ | |
1522 | { | |
1523 | **buffer = CUPS_ASN1_OID; | |
1524 | (*buffer) ++; | |
1525 | ||
1526 | asn1_set_length(buffer, asn1_size_oid(oid)); | |
1527 | ||
ac884b6a MS |
1528 | if (oid[1] < 0) |
1529 | { | |
1530 | asn1_set_packed(buffer, oid[0] * 40); | |
1531 | return; | |
1532 | } | |
1533 | ||
91c84a35 MS |
1534 | asn1_set_packed(buffer, oid[0] * 40 + oid[1]); |
1535 | ||
ac884b6a | 1536 | for (oid += 2; *oid >= 0; oid ++) |
91c84a35 MS |
1537 | asn1_set_packed(buffer, *oid); |
1538 | } | |
1539 | ||
1540 | ||
1541 | /* | |
1542 | * 'asn1_set_packed()' - Set a packed integer value. | |
1543 | */ | |
1544 | ||
1545 | static void | |
1546 | asn1_set_packed(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1547 | int integer) /* I - Integer value */ | |
1548 | { | |
1549 | if (integer > 0xfffffff) | |
1550 | { | |
ac884b6a | 1551 | **buffer = ((integer >> 28) & 0x7f) | 0x80; |
91c84a35 MS |
1552 | (*buffer) ++; |
1553 | } | |
1554 | ||
1555 | if (integer > 0x1fffff) | |
1556 | { | |
ac884b6a | 1557 | **buffer = ((integer >> 21) & 0x7f) | 0x80; |
91c84a35 MS |
1558 | (*buffer) ++; |
1559 | } | |
1560 | ||
1561 | if (integer > 0x3fff) | |
1562 | { | |
ac884b6a | 1563 | **buffer = ((integer >> 14) & 0x7f) | 0x80; |
91c84a35 MS |
1564 | (*buffer) ++; |
1565 | } | |
1566 | ||
1567 | if (integer > 0x7f) | |
1568 | { | |
ac884b6a | 1569 | **buffer = ((integer >> 7) & 0x7f) | 0x80; |
91c84a35 MS |
1570 | (*buffer) ++; |
1571 | } | |
1572 | ||
1573 | **buffer = integer & 0x7f; | |
1574 | (*buffer) ++; | |
1575 | } | |
1576 | ||
1577 | ||
1578 | /* | |
1579 | * 'asn1_size_integer()' - Figure out the number of bytes needed for an | |
1580 | * integer value. | |
1581 | */ | |
1582 | ||
7e86f2f6 | 1583 | static unsigned /* O - Size in bytes */ |
91c84a35 MS |
1584 | asn1_size_integer(int integer) /* I - Integer value */ |
1585 | { | |
1586 | if (integer > 0x7fffff || integer < -0x800000) | |
1587 | return (4); | |
1588 | else if (integer > 0x7fff || integer < -0x8000) | |
1589 | return (3); | |
1590 | else if (integer > 0x7f || integer < -0x80) | |
1591 | return (2); | |
1592 | else | |
1593 | return (1); | |
1594 | } | |
1595 | ||
1596 | ||
1597 | /* | |
1598 | * 'asn1_size_length()' - Figure out the number of bytes needed for a | |
1599 | * length value. | |
1600 | */ | |
1601 | ||
7e86f2f6 MS |
1602 | static unsigned /* O - Size in bytes */ |
1603 | asn1_size_length(unsigned length) /* I - Length value */ | |
91c84a35 MS |
1604 | { |
1605 | if (length > 0xff) | |
1606 | return (3); | |
1607 | else if (length > 0x7f) | |
1608 | return (2); | |
1609 | else | |
1610 | return (1); | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /* | |
1615 | * 'asn1_size_oid()' - Figure out the numebr of bytes needed for an | |
1616 | * OID value. | |
1617 | */ | |
1618 | ||
7e86f2f6 | 1619 | static unsigned /* O - Size in bytes */ |
91c84a35 MS |
1620 | asn1_size_oid(const int *oid) /* I - OID value */ |
1621 | { | |
7e86f2f6 | 1622 | unsigned length; /* Length of value */ |
91c84a35 MS |
1623 | |
1624 | ||
ac884b6a MS |
1625 | if (oid[1] < 0) |
1626 | return (asn1_size_packed(oid[0] * 40)); | |
1627 | ||
1628 | for (length = asn1_size_packed(oid[0] * 40 + oid[1]), oid += 2; | |
1629 | *oid >= 0; | |
1630 | oid ++) | |
91c84a35 MS |
1631 | length += asn1_size_packed(*oid); |
1632 | ||
1633 | return (length); | |
1634 | } | |
1635 | ||
1636 | ||
1637 | /* | |
1638 | * 'asn1_size_packed()' - Figure out the number of bytes needed for a | |
1639 | * packed integer value. | |
1640 | */ | |
1641 | ||
7e86f2f6 | 1642 | static unsigned /* O - Size in bytes */ |
91c84a35 MS |
1643 | asn1_size_packed(int integer) /* I - Integer value */ |
1644 | { | |
1645 | if (integer > 0xfffffff) | |
1646 | return (5); | |
1647 | else if (integer > 0x1fffff) | |
1648 | return (4); | |
1649 | else if (integer > 0x3fff) | |
1650 | return (3); | |
1651 | else if (integer > 0x7f) | |
1652 | return (2); | |
1653 | else | |
1654 | return (1); | |
1655 | } | |
1656 | ||
1657 | ||
1658 | /* | |
1659 | * 'snmp_set_error()' - Set the localized error for a packet. | |
1660 | */ | |
1661 | ||
1662 | static void | |
1663 | snmp_set_error(cups_snmp_t *packet, /* I - Packet */ | |
1664 | const char *message) /* I - Error message */ | |
1665 | { | |
1666 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
1667 | ||
1668 | ||
1669 | if (!cg->lang_default) | |
1670 | cg->lang_default = cupsLangDefault(); | |
1671 | ||
1672 | packet->error = _cupsLangString(cg->lang_default, message); | |
1673 | } |