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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" |
fb863569 | 17 | #include "debug-internal.h" |
91c84a35 | 18 | #ifdef HAVE_POLL |
dcb445bc | 19 | # include <poll.h> |
91c84a35 MS |
20 | #endif /* HAVE_POLL */ |
21 | ||
22 | ||
23 | /* | |
24 | * Local functions... | |
25 | */ | |
26 | ||
91c84a35 MS |
27 | static void asn1_debug(const char *prefix, unsigned char *buffer, |
28 | size_t len, int indent); | |
ac884b6a MS |
29 | static int asn1_decode_snmp(unsigned char *buffer, size_t len, |
30 | cups_snmp_t *packet); | |
91c84a35 MS |
31 | static int asn1_encode_snmp(unsigned char *buffer, size_t len, |
32 | cups_snmp_t *packet); | |
33 | static int asn1_get_integer(unsigned char **buffer, | |
34 | unsigned char *bufend, | |
7e86f2f6 | 35 | unsigned length); |
91c84a35 MS |
36 | static int asn1_get_oid(unsigned char **buffer, |
37 | unsigned char *bufend, | |
7e86f2f6 | 38 | unsigned length, int *oid, int oidsize); |
91c84a35 MS |
39 | static int asn1_get_packed(unsigned char **buffer, |
40 | unsigned char *bufend); | |
41 | static char *asn1_get_string(unsigned char **buffer, | |
42 | unsigned char *bufend, | |
7e86f2f6 MS |
43 | unsigned length, char *string, |
44 | size_t strsize); | |
41681883 | 45 | static unsigned asn1_get_length(unsigned char **buffer, |
91c84a35 MS |
46 | unsigned char *bufend); |
47 | static int asn1_get_type(unsigned char **buffer, | |
48 | unsigned char *bufend); | |
49 | static void asn1_set_integer(unsigned char **buffer, | |
50 | int integer); | |
51 | static void asn1_set_length(unsigned char **buffer, | |
41681883 | 52 | unsigned length); |
91c84a35 MS |
53 | static void asn1_set_oid(unsigned char **buffer, |
54 | const int *oid); | |
55 | static void asn1_set_packed(unsigned char **buffer, | |
56 | int integer); | |
7e86f2f6 MS |
57 | static unsigned asn1_size_integer(int integer); |
58 | static unsigned asn1_size_length(unsigned length); | |
59 | static unsigned asn1_size_oid(const int *oid); | |
60 | static unsigned asn1_size_packed(int integer); | |
91c84a35 MS |
61 | static void snmp_set_error(cups_snmp_t *packet, |
62 | const char *message); | |
63 | ||
64 | ||
65 | /* | |
7a14d768 | 66 | * '_cupsSNMPClose()' - Close a SNMP socket. |
91c84a35 MS |
67 | */ |
68 | ||
69 | void | |
7a14d768 | 70 | _cupsSNMPClose(int fd) /* I - SNMP socket file descriptor */ |
91c84a35 | 71 | { |
e07d4801 | 72 | DEBUG_printf(("4_cupsSNMPClose(fd=%d)", fd)); |
969307f0 | 73 | |
87e98392 | 74 | httpAddrClose(NULL, fd); |
91c84a35 MS |
75 | } |
76 | ||
77 | ||
78 | /* | |
7a14d768 | 79 | * '_cupsSNMPCopyOID()' - Copy an OID. |
ac884b6a MS |
80 | * |
81 | * The array pointed to by "src" is terminated by the value -1. | |
91c84a35 MS |
82 | */ |
83 | ||
84 | int * /* O - New OID */ | |
7a14d768 MS |
85 | _cupsSNMPCopyOID(int *dst, /* I - Destination OID */ |
86 | const int *src, /* I - Source OID */ | |
87 | int dstsize) /* I - Number of integers in dst */ | |
91c84a35 MS |
88 | { |
89 | int i; /* Looping var */ | |
90 | ||
91 | ||
e07d4801 | 92 | DEBUG_printf(("4_cupsSNMPCopyOID(dst=%p, src=%p, dstsize=%d)", dst, src, |
969307f0 MS |
93 | dstsize)); |
94 | ||
ac884b6a | 95 | for (i = 0, dstsize --; src[i] >= 0 && i < dstsize; i ++) |
91c84a35 MS |
96 | dst[i] = src[i]; |
97 | ||
ac884b6a | 98 | dst[i] = -1; |
91c84a35 MS |
99 | |
100 | return (dst); | |
101 | } | |
102 | ||
103 | ||
ac884b6a | 104 | /* |
7a14d768 | 105 | * '_cupsSNMPDefaultCommunity()' - Get the default SNMP community name. |
ac884b6a MS |
106 | * |
107 | * The default community name is the first community name found in the | |
108 | * snmp.conf file. If no community name is defined there, "public" is used. | |
ac884b6a MS |
109 | */ |
110 | ||
111 | const char * /* O - Default community name */ | |
7a14d768 | 112 | _cupsSNMPDefaultCommunity(void) |
ac884b6a MS |
113 | { |
114 | cups_file_t *fp; /* snmp.conf file */ | |
115 | char line[1024], /* Line from file */ | |
116 | *value; /* Value from file */ | |
117 | int linenum; /* Line number in file */ | |
118 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
119 | ||
120 | ||
e07d4801 | 121 | DEBUG_puts("4_cupsSNMPDefaultCommunity()"); |
969307f0 | 122 | |
ac884b6a MS |
123 | if (!cg->snmp_community[0]) |
124 | { | |
125 | strlcpy(cg->snmp_community, "public", sizeof(cg->snmp_community)); | |
126 | ||
127 | snprintf(line, sizeof(line), "%s/snmp.conf", cg->cups_serverroot); | |
128 | if ((fp = cupsFileOpen(line, "r")) != NULL) | |
129 | { | |
130 | linenum = 0; | |
131 | while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum)) | |
88f9aafc | 132 | if (!_cups_strcasecmp(line, "Community") && value) |
ac884b6a MS |
133 | { |
134 | strlcpy(cg->snmp_community, value, sizeof(cg->snmp_community)); | |
135 | break; | |
136 | } | |
137 | ||
138 | cupsFileClose(fp); | |
139 | } | |
140 | } | |
141 | ||
e07d4801 | 142 | DEBUG_printf(("5_cupsSNMPDefaultCommunity: Returning \"%s\"", |
969307f0 MS |
143 | cg->snmp_community)); |
144 | ||
ac884b6a MS |
145 | return (cg->snmp_community); |
146 | } | |
147 | ||
148 | ||
91c84a35 | 149 | /* |
7a14d768 | 150 | * '_cupsSNMPIsOID()' - Test whether a SNMP response contains the specified OID. |
91c84a35 | 151 | * |
ac884b6a | 152 | * The array pointed to by "oid" is terminated by the value -1. |
91c84a35 MS |
153 | */ |
154 | ||
155 | int /* O - 1 if equal, 0 if not equal */ | |
7a14d768 MS |
156 | _cupsSNMPIsOID(cups_snmp_t *packet, /* I - Response packet */ |
157 | const int *oid) /* I - OID */ | |
91c84a35 MS |
158 | { |
159 | int i; /* Looping var */ | |
160 | ||
161 | ||
162 | /* | |
163 | * Range check input... | |
164 | */ | |
165 | ||
e07d4801 | 166 | DEBUG_printf(("4_cupsSNMPIsOID(packet=%p, oid=%p)", packet, oid)); |
969307f0 | 167 | |
91c84a35 | 168 | if (!packet || !oid) |
969307f0 | 169 | { |
e07d4801 | 170 | DEBUG_puts("5_cupsSNMPIsOID: Returning 0"); |
969307f0 | 171 | |
91c84a35 | 172 | return (0); |
969307f0 | 173 | } |
91c84a35 MS |
174 | |
175 | /* | |
176 | * Compare OIDs... | |
177 | */ | |
178 | ||
ac884b6a MS |
179 | for (i = 0; |
180 | i < CUPS_SNMP_MAX_OID && oid[i] >= 0 && packet->object_name[i] >= 0; | |
181 | i ++) | |
91c84a35 | 182 | if (oid[i] != packet->object_name[i]) |
969307f0 | 183 | { |
e07d4801 | 184 | DEBUG_puts("5_cupsSNMPIsOID: Returning 0"); |
969307f0 | 185 | |
91c84a35 | 186 | return (0); |
969307f0 MS |
187 | } |
188 | ||
e07d4801 | 189 | DEBUG_printf(("5_cupsSNMPIsOID: Returning %d", |
969307f0 | 190 | i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i])); |
91c84a35 MS |
191 | |
192 | return (i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i]); | |
193 | } | |
194 | ||
195 | ||
196 | /* | |
7a14d768 MS |
197 | * '_cupsSNMPIsOIDPrefixed()' - Test whether a SNMP response uses the specified |
198 | * OID prefix. | |
91c84a35 | 199 | * |
ac884b6a | 200 | * The array pointed to by "prefix" is terminated by the value -1. |
91c84a35 MS |
201 | */ |
202 | ||
203 | int /* O - 1 if prefixed, 0 if not prefixed */ | |
7a14d768 | 204 | _cupsSNMPIsOIDPrefixed( |
91c84a35 MS |
205 | cups_snmp_t *packet, /* I - Response packet */ |
206 | const int *prefix) /* I - OID prefix */ | |
207 | { | |
208 | int i; /* Looping var */ | |
209 | ||
210 | ||
211 | /* | |
212 | * Range check input... | |
213 | */ | |
214 | ||
e07d4801 | 215 | DEBUG_printf(("4_cupsSNMPIsOIDPrefixed(packet=%p, prefix=%p)", packet, |
969307f0 MS |
216 | prefix)); |
217 | ||
91c84a35 | 218 | if (!packet || !prefix) |
969307f0 | 219 | { |
e07d4801 | 220 | DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0"); |
969307f0 | 221 | |
91c84a35 | 222 | return (0); |
969307f0 | 223 | } |
91c84a35 MS |
224 | |
225 | /* | |
226 | * Compare OIDs... | |
227 | */ | |
228 | ||
229 | for (i = 0; | |
ac884b6a | 230 | i < CUPS_SNMP_MAX_OID && prefix[i] >= 0 && packet->object_name[i] >= 0; |
91c84a35 MS |
231 | i ++) |
232 | if (prefix[i] != packet->object_name[i]) | |
969307f0 | 233 | { |
e07d4801 | 234 | DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0"); |
969307f0 | 235 | |
91c84a35 | 236 | return (0); |
969307f0 MS |
237 | } |
238 | ||
e07d4801 | 239 | DEBUG_printf(("5_cupsSNMPIsOIDPrefixed: Returning %d", |
969307f0 | 240 | i < CUPS_SNMP_MAX_OID)); |
91c84a35 MS |
241 | |
242 | return (i < CUPS_SNMP_MAX_OID); | |
243 | } | |
244 | ||
245 | ||
20fbc903 MS |
246 | /* |
247 | * '_cupsSNMPOIDToString()' - Convert an OID to a string. | |
20fbc903 MS |
248 | */ |
249 | ||
250 | ||
251 | char * /* O - New string or @code NULL@ on error */ | |
252 | _cupsSNMPOIDToString(const int *src, /* I - OID */ | |
253 | char *dst, /* I - String buffer */ | |
254 | size_t dstsize) /* I - Size of string buffer */ | |
255 | { | |
256 | char *dstptr, /* Pointer into string buffer */ | |
257 | *dstend; /* End of string buffer */ | |
258 | ||
259 | ||
e07d4801 | 260 | DEBUG_printf(("4_cupsSNMPOIDToString(src=%p, dst=%p, dstsize=" CUPS_LLFMT ")", |
20fbc903 MS |
261 | src, dst, CUPS_LLCAST dstsize)); |
262 | ||
263 | /* | |
264 | * Range check input... | |
265 | */ | |
266 | ||
267 | if (!src || !dst || dstsize < 4) | |
268 | return (NULL); | |
269 | ||
270 | /* | |
271 | * Loop through the OID array and build a string... | |
272 | */ | |
273 | ||
274 | for (dstptr = dst, dstend = dstptr + dstsize - 1; | |
275 | *src >= 0 && dstptr < dstend; | |
276 | src ++, dstptr += strlen(dstptr)) | |
07623986 | 277 | snprintf(dstptr, (size_t)(dstend - dstptr + 1), ".%d", *src); |
20fbc903 MS |
278 | |
279 | if (*src >= 0) | |
280 | return (NULL); | |
281 | else | |
282 | return (dst); | |
283 | } | |
284 | ||
285 | ||
91c84a35 | 286 | /* |
7a14d768 | 287 | * '_cupsSNMPOpen()' - Open a SNMP socket. |
91c84a35 MS |
288 | */ |
289 | ||
290 | int /* O - SNMP socket file descriptor */ | |
7a14d768 | 291 | _cupsSNMPOpen(int family) /* I - Address family - @code AF_INET@ or @code AF_INET6@ */ |
91c84a35 MS |
292 | { |
293 | int fd; /* SNMP socket file descriptor */ | |
294 | int val; /* Socket option value */ | |
295 | ||
296 | ||
297 | /* | |
298 | * Create the SNMP socket... | |
299 | */ | |
300 | ||
e07d4801 | 301 | DEBUG_printf(("4_cupsSNMPOpen(family=%d)", family)); |
969307f0 | 302 | |
ac884b6a | 303 | if ((fd = socket(family, SOCK_DGRAM, 0)) < 0) |
969307f0 | 304 | { |
e07d4801 | 305 | DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno))); |
969307f0 | 306 | |
91c84a35 | 307 | return (-1); |
969307f0 | 308 | } |
91c84a35 MS |
309 | |
310 | /* | |
311 | * Set the "broadcast" flag... | |
312 | */ | |
313 | ||
314 | val = 1; | |
315 | ||
db8b865d | 316 | if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, CUPS_SOCAST &val, sizeof(val))) |
91c84a35 | 317 | { |
e07d4801 | 318 | DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno))); |
969307f0 | 319 | |
91c84a35 MS |
320 | close(fd); |
321 | ||
322 | return (-1); | |
323 | } | |
324 | ||
e07d4801 | 325 | DEBUG_printf(("5_cupsSNMPOpen: Returning %d", fd)); |
969307f0 | 326 | |
91c84a35 MS |
327 | return (fd); |
328 | } | |
329 | ||
330 | ||
331 | /* | |
7a14d768 | 332 | * '_cupsSNMPRead()' - Read and parse a SNMP response. |
91c84a35 | 333 | * |
7a14d768 | 334 | * If "timeout" is negative, @code _cupsSNMPRead@ will wait for a response |
91c84a35 | 335 | * indefinitely. |
91c84a35 MS |
336 | */ |
337 | ||
ac884b6a | 338 | cups_snmp_t * /* O - SNMP packet or @code NULL@ if none */ |
7a14d768 | 339 | _cupsSNMPRead(int fd, /* I - SNMP socket file descriptor */ |
969307f0 MS |
340 | cups_snmp_t *packet, /* I - SNMP packet buffer */ |
341 | double timeout) /* I - Timeout in seconds */ | |
91c84a35 MS |
342 | { |
343 | unsigned char buffer[CUPS_SNMP_MAX_PACKET]; | |
344 | /* Data packet */ | |
7e86f2f6 | 345 | ssize_t bytes; /* Number of bytes received */ |
91c84a35 | 346 | socklen_t addrlen; /* Source address length */ |
ac884b6a | 347 | http_addr_t address; /* Source address */ |
91c84a35 MS |
348 | |
349 | ||
350 | /* | |
351 | * Range check input... | |
352 | */ | |
353 | ||
e07d4801 | 354 | DEBUG_printf(("4_cupsSNMPRead(fd=%d, packet=%p, timeout=%.1f)", fd, packet, |
969307f0 MS |
355 | timeout)); |
356 | ||
91c84a35 | 357 | if (fd < 0 || !packet) |
969307f0 | 358 | { |
e07d4801 | 359 | DEBUG_puts("5_cupsSNMPRead: Returning NULL"); |
969307f0 | 360 | |
91c84a35 | 361 | return (NULL); |
969307f0 | 362 | } |
91c84a35 MS |
363 | |
364 | /* | |
365 | * Optionally wait for a response... | |
366 | */ | |
367 | ||
568fa3fa | 368 | if (timeout >= 0.0) |
91c84a35 MS |
369 | { |
370 | int ready; /* Data ready on socket? */ | |
371 | #ifdef HAVE_POLL | |
372 | struct pollfd pfd; /* Polled file descriptor */ | |
373 | ||
374 | pfd.fd = fd; | |
375 | pfd.events = POLLIN; | |
376 | ||
568fa3fa | 377 | while ((ready = poll(&pfd, 1, (int)(timeout * 1000.0))) < 0 && |
e07d4801 | 378 | (errno == EINTR || errno == EAGAIN)); |
91c84a35 MS |
379 | |
380 | #else | |
381 | fd_set input_set; /* select() input set */ | |
568fa3fa | 382 | struct timeval stimeout; /* select() timeout */ |
91c84a35 MS |
383 | |
384 | do | |
385 | { | |
386 | FD_ZERO(&input_set); | |
387 | FD_SET(fd, &input_set); | |
388 | ||
568fa3fa | 389 | stimeout.tv_sec = (int)timeout; |
536bc2c6 | 390 | stimeout.tv_usec = (int)((timeout - stimeout.tv_sec) * 1000000); |
91c84a35 | 391 | |
568fa3fa | 392 | ready = select(fd + 1, &input_set, NULL, NULL, &stimeout); |
91c84a35 | 393 | } |
19dc16f7 | 394 | # ifdef _WIN32 |
91c84a35 MS |
395 | while (ready < 0 && WSAGetLastError() == WSAEINTR); |
396 | # else | |
e07d4801 | 397 | while (ready < 0 && (errno == EINTR || errno == EAGAIN)); |
19dc16f7 | 398 | # endif /* _WIN32 */ |
91c84a35 MS |
399 | #endif /* HAVE_POLL */ |
400 | ||
401 | /* | |
402 | * If we don't have any data ready, return right away... | |
403 | */ | |
404 | ||
405 | if (ready <= 0) | |
969307f0 | 406 | { |
e07d4801 | 407 | DEBUG_puts("5_cupsSNMPRead: Returning NULL (timeout)"); |
969307f0 | 408 | |
91c84a35 | 409 | return (NULL); |
969307f0 | 410 | } |
91c84a35 MS |
411 | } |
412 | ||
413 | /* | |
414 | * Read the response data... | |
415 | */ | |
416 | ||
ac884b6a | 417 | addrlen = sizeof(address); |
91c84a35 | 418 | |
ac884b6a MS |
419 | if ((bytes = recvfrom(fd, buffer, sizeof(buffer), 0, (void *)&address, |
420 | &addrlen)) < 0) | |
969307f0 | 421 | { |
e07d4801 | 422 | DEBUG_printf(("5_cupsSNMPRead: Returning NULL (%s)", strerror(errno))); |
969307f0 | 423 | |
91c84a35 | 424 | return (NULL); |
969307f0 | 425 | } |
91c84a35 MS |
426 | |
427 | /* | |
428 | * Look for the response status code in the SNMP message header... | |
429 | */ | |
430 | ||
7e86f2f6 | 431 | asn1_debug("DEBUG: IN ", buffer, (size_t)bytes, 0); |
91c84a35 | 432 | |
7e86f2f6 | 433 | asn1_decode_snmp(buffer, (size_t)bytes, packet); |
91c84a35 | 434 | |
ac884b6a MS |
435 | memcpy(&(packet->address), &address, sizeof(packet->address)); |
436 | ||
91c84a35 MS |
437 | /* |
438 | * Return decoded data packet... | |
439 | */ | |
440 | ||
e07d4801 | 441 | DEBUG_puts("5_cupsSNMPRead: Returning packet"); |
969307f0 | 442 | |
91c84a35 MS |
443 | return (packet); |
444 | } | |
445 | ||
446 | ||
447 | /* | |
7a14d768 | 448 | * '_cupsSNMPSetDebug()' - Enable/disable debug logging to stderr. |
91c84a35 MS |
449 | */ |
450 | ||
451 | void | |
7a14d768 | 452 | _cupsSNMPSetDebug(int level) /* I - 1 to enable debug output, 0 otherwise */ |
91c84a35 MS |
453 | { |
454 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
455 | ||
456 | ||
e07d4801 | 457 | DEBUG_printf(("4_cupsSNMPSetDebug(level=%d)", level)); |
969307f0 | 458 | |
91c84a35 MS |
459 | cg->snmp_debug = level; |
460 | } | |
461 | ||
462 | ||
20fbc903 MS |
463 | /* |
464 | * '_cupsSNMPStringToOID()' - Convert a numeric OID string to an OID array. | |
465 | * | |
466 | * This function converts a string of the form ".N.N.N.N.N" to the | |
467 | * corresponding OID array terminated by -1. | |
468 | * | |
469 | * @code NULL@ is returned if the array is not large enough or the string is | |
470 | * not a valid OID number. | |
20fbc903 MS |
471 | */ |
472 | ||
473 | int * /* O - Pointer to OID array or @code NULL@ on error */ | |
474 | _cupsSNMPStringToOID(const char *src, /* I - OID string */ | |
475 | int *dst, /* I - OID array */ | |
476 | int dstsize)/* I - Number of integers in OID array */ | |
477 | { | |
478 | int *dstptr, /* Pointer into OID array */ | |
479 | *dstend; /* End of OID array */ | |
480 | ||
481 | ||
e07d4801 | 482 | DEBUG_printf(("4_cupsSNMPStringToOID(src=\"%s\", dst=%p, dstsize=%d)", |
20fbc903 MS |
483 | src, dst, dstsize)); |
484 | ||
485 | /* | |
486 | * Range check input... | |
487 | */ | |
488 | ||
489 | if (!src || !dst || dstsize < 2) | |
490 | return (NULL); | |
491 | ||
492 | /* | |
493 | * Skip leading "."... | |
494 | */ | |
495 | ||
496 | if (*src == '.') | |
497 | src ++; | |
498 | ||
499 | /* | |
500 | * Loop to the end of the string... | |
501 | */ | |
502 | ||
503 | for (dstend = dst + dstsize - 1, dstptr = dst, *dstptr = 0; | |
504 | *src && dstptr < dstend; | |
505 | src ++) | |
506 | { | |
507 | if (*src == '.') | |
508 | { | |
509 | dstptr ++; | |
510 | *dstptr = 0; | |
511 | } | |
512 | else if (isdigit(*src & 255)) | |
513 | *dstptr = *dstptr * 10 + *src - '0'; | |
514 | else | |
515 | break; | |
516 | } | |
517 | ||
518 | if (*src) | |
519 | return (NULL); | |
520 | ||
521 | /* | |
522 | * Terminate the end of the OID array and return... | |
523 | */ | |
524 | ||
525 | dstptr[1] = -1; | |
526 | ||
527 | return (dst); | |
528 | } | |
529 | ||
530 | ||
ac884b6a | 531 | /* |
7a14d768 | 532 | * '_cupsSNMPWalk()' - Enumerate a group of OIDs. |
ac884b6a MS |
533 | * |
534 | * This function queries all of the OIDs with the specified OID prefix, | |
535 | * calling the "cb" function for every response that is received. | |
536 | * | |
537 | * The array pointed to by "prefix" is terminated by the value -1. | |
538 | * | |
7a14d768 | 539 | * If "timeout" is negative, @code _cupsSNMPWalk@ will wait for a response |
568fa3fa | 540 | * indefinitely. |
ac884b6a MS |
541 | */ |
542 | ||
543 | int /* O - Number of OIDs found or -1 on error */ | |
7a14d768 MS |
544 | _cupsSNMPWalk(int fd, /* I - SNMP socket */ |
545 | http_addr_t *address, /* I - Address to query */ | |
546 | int version, /* I - SNMP version */ | |
547 | const char *community,/* I - Community name */ | |
548 | const int *prefix, /* I - OID prefix */ | |
549 | double timeout, /* I - Timeout for each response in seconds */ | |
550 | cups_snmp_cb_t cb, /* I - Function to call for each response */ | |
551 | void *data) /* I - User data pointer that is passed to the callback function */ | |
ac884b6a MS |
552 | { |
553 | int count = 0; /* Number of OIDs found */ | |
7e86f2f6 | 554 | unsigned request_id = 0; /* Current request ID */ |
ac884b6a | 555 | cups_snmp_t packet; /* Current response packet */ |
18ecb428 MS |
556 | int lastoid[CUPS_SNMP_MAX_OID]; |
557 | /* Last OID we got */ | |
ac884b6a MS |
558 | |
559 | ||
560 | /* | |
561 | * Range check input... | |
562 | */ | |
563 | ||
e07d4801 MS |
564 | DEBUG_printf(("4_cupsSNMPWalk(fd=%d, address=%p, version=%d, " |
565 | "community=\"%s\", prefix=%p, timeout=%.1f, cb=%p, data=%p)", | |
566 | fd, address, version, community, prefix, timeout, cb, data)); | |
969307f0 | 567 | |
ac884b6a MS |
568 | if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community || |
569 | !prefix || !cb) | |
969307f0 | 570 | { |
e07d4801 | 571 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 572 | |
ac884b6a | 573 | return (-1); |
969307f0 | 574 | } |
ac884b6a MS |
575 | |
576 | /* | |
577 | * Copy the OID prefix and then loop until we have no more OIDs... | |
578 | */ | |
579 | ||
7a14d768 | 580 | _cupsSNMPCopyOID(packet.object_name, prefix, CUPS_SNMP_MAX_OID); |
18ecb428 | 581 | lastoid[0] = -1; |
ac884b6a MS |
582 | |
583 | for (;;) | |
584 | { | |
585 | request_id ++; | |
586 | ||
7a14d768 | 587 | if (!_cupsSNMPWrite(fd, address, version, community, |
18ecb428 MS |
588 | CUPS_ASN1_GET_NEXT_REQUEST, request_id, |
589 | packet.object_name)) | |
969307f0 | 590 | { |
e07d4801 | 591 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 592 | |
ac884b6a | 593 | return (-1); |
969307f0 | 594 | } |
ac884b6a | 595 | |
7a14d768 | 596 | if (!_cupsSNMPRead(fd, &packet, timeout)) |
969307f0 | 597 | { |
e07d4801 | 598 | DEBUG_puts("5_cupsSNMPWalk: Returning -1"); |
969307f0 | 599 | |
ac884b6a | 600 | return (-1); |
969307f0 | 601 | } |
ac884b6a | 602 | |
18ecb428 MS |
603 | if (!_cupsSNMPIsOIDPrefixed(&packet, prefix) || |
604 | _cupsSNMPIsOID(&packet, lastoid)) | |
969307f0 | 605 | { |
e07d4801 | 606 | DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count)); |
969307f0 | 607 | |
ac884b6a | 608 | return (count); |
969307f0 | 609 | } |
ac884b6a MS |
610 | |
611 | if (packet.error || packet.error_status) | |
969307f0 | 612 | { |
e07d4801 | 613 | DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count > 0 ? count : -1)); |
969307f0 | 614 | |
ac884b6a | 615 | return (count > 0 ? count : -1); |
969307f0 | 616 | } |
ac884b6a | 617 | |
18ecb428 MS |
618 | _cupsSNMPCopyOID(lastoid, packet.object_name, CUPS_SNMP_MAX_OID); |
619 | ||
ac884b6a MS |
620 | count ++; |
621 | ||
622 | (*cb)(&packet, data); | |
623 | } | |
624 | } | |
625 | ||
626 | ||
91c84a35 | 627 | /* |
7a14d768 | 628 | * '_cupsSNMPWrite()' - Send an SNMP query packet. |
91c84a35 | 629 | * |
ac884b6a | 630 | * The array pointed to by "oid" is terminated by the value -1. |
91c84a35 MS |
631 | */ |
632 | ||
633 | int /* O - 1 on success, 0 on error */ | |
7a14d768 | 634 | _cupsSNMPWrite( |
91c84a35 MS |
635 | int fd, /* I - SNMP socket */ |
636 | http_addr_t *address, /* I - Address to send to */ | |
637 | int version, /* I - SNMP version */ | |
638 | const char *community, /* I - Community name */ | |
639 | cups_asn1_t request_type, /* I - Request type */ | |
640 | const unsigned request_id, /* I - Request ID */ | |
641 | const int *oid) /* I - OID */ | |
642 | { | |
643 | int i; /* Looping var */ | |
644 | cups_snmp_t packet; /* SNMP message packet */ | |
645 | unsigned char buffer[CUPS_SNMP_MAX_PACKET]; | |
646 | /* SNMP message buffer */ | |
7e86f2f6 | 647 | ssize_t bytes; /* Size of message */ |
1ff0402e | 648 | http_addr_t temp; /* Copy of address */ |
91c84a35 MS |
649 | |
650 | ||
ac884b6a MS |
651 | /* |
652 | * Range check input... | |
653 | */ | |
654 | ||
e07d4801 MS |
655 | DEBUG_printf(("4_cupsSNMPWrite(fd=%d, address=%p, version=%d, " |
656 | "community=\"%s\", request_type=%d, request_id=%u, oid=%p)", | |
657 | fd, address, version, community, request_type, request_id, oid)); | |
969307f0 | 658 | |
ac884b6a MS |
659 | if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community || |
660 | (request_type != CUPS_ASN1_GET_REQUEST && | |
661 | request_type != CUPS_ASN1_GET_NEXT_REQUEST) || request_id < 1 || !oid) | |
969307f0 | 662 | { |
e07d4801 | 663 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (bad arguments)"); |
969307f0 | 664 | |
ac884b6a | 665 | return (0); |
969307f0 | 666 | } |
ac884b6a | 667 | |
91c84a35 MS |
668 | /* |
669 | * Create the SNMP message... | |
670 | */ | |
671 | ||
672 | memset(&packet, 0, sizeof(packet)); | |
673 | ||
674 | packet.version = version; | |
675 | packet.request_type = request_type; | |
676 | packet.request_id = request_id; | |
677 | packet.object_type = CUPS_ASN1_NULL_VALUE; | |
88f9aafc | 678 | |
91c84a35 MS |
679 | strlcpy(packet.community, community, sizeof(packet.community)); |
680 | ||
ac884b6a | 681 | for (i = 0; oid[i] >= 0 && i < (CUPS_SNMP_MAX_OID - 1); i ++) |
91c84a35 | 682 | packet.object_name[i] = oid[i]; |
ac884b6a MS |
683 | packet.object_name[i] = -1; |
684 | ||
685 | if (oid[i] >= 0) | |
686 | { | |
e07d4801 | 687 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (OID too big)"); |
969307f0 | 688 | |
ac884b6a MS |
689 | errno = E2BIG; |
690 | return (0); | |
691 | } | |
91c84a35 MS |
692 | |
693 | bytes = asn1_encode_snmp(buffer, sizeof(buffer), &packet); | |
694 | ||
695 | if (bytes < 0) | |
696 | { | |
e07d4801 | 697 | DEBUG_puts("5_cupsSNMPWrite: Returning 0 (request too big)"); |
969307f0 | 698 | |
91c84a35 | 699 | errno = E2BIG; |
91c84a35 MS |
700 | return (0); |
701 | } | |
702 | ||
7e86f2f6 | 703 | asn1_debug("DEBUG: OUT ", buffer, (size_t)bytes, 0); |
91c84a35 MS |
704 | |
705 | /* | |
706 | * Send the message... | |
707 | */ | |
708 | ||
1ff0402e MS |
709 | temp = *address; |
710 | ||
22c9029b | 711 | _httpAddrSetPort(&temp, CUPS_SNMP_PORT); |
91c84a35 | 712 | |
7e86f2f6 | 713 | return (sendto(fd, buffer, (size_t)bytes, 0, (void *)&temp, (socklen_t)httpAddrLength(&temp)) == bytes); |
91c84a35 MS |
714 | } |
715 | ||
716 | ||
ac884b6a MS |
717 | /* |
718 | * 'asn1_debug()' - Decode an ASN1-encoded message. | |
719 | */ | |
720 | ||
721 | static void | |
722 | asn1_debug(const char *prefix, /* I - Prefix string */ | |
723 | unsigned char *buffer, /* I - Buffer */ | |
724 | size_t len, /* I - Length of buffer */ | |
725 | int indent) /* I - Indentation */ | |
726 | { | |
7e86f2f6 | 727 | size_t i; /* Looping var */ |
ac884b6a MS |
728 | unsigned char *bufend; /* End of buffer */ |
729 | int integer; /* Number value */ | |
730 | int oid[CUPS_SNMP_MAX_OID]; /* OID value */ | |
731 | char string[CUPS_SNMP_MAX_STRING]; | |
732 | /* String value */ | |
733 | unsigned char value_type; /* Type of value */ | |
7e86f2f6 | 734 | unsigned value_length; /* Length of value */ |
ac884b6a MS |
735 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ |
736 | ||
737 | ||
7f500d89 MS |
738 | #ifdef __clang_analyzer__ /* Suppress bogus clang error */ |
739 | memset(string, 0, sizeof(string)); | |
740 | #endif /* __clang_analyzer__ */ | |
741 | ||
ac884b6a MS |
742 | if (cg->snmp_debug <= 0) |
743 | return; | |
744 | ||
745 | if (cg->snmp_debug > 1 && indent == 0) | |
746 | { | |
747 | /* | |
748 | * Do a hex dump of the packet... | |
749 | */ | |
750 | ||
7e86f2f6 | 751 | size_t j; |
ac884b6a MS |
752 | |
753 | fprintf(stderr, "%sHex Dump (%d bytes):\n", prefix, (int)len); | |
754 | ||
7e86f2f6 | 755 | for (i = 0; i < len; i += 16) |
ac884b6a | 756 | { |
7e86f2f6 | 757 | fprintf(stderr, "%s%04x:", prefix, (unsigned)i); |
ac884b6a | 758 | |
7e86f2f6 | 759 | for (j = 0; j < 16 && (i + j) < len; j ++) |
ac884b6a MS |
760 | { |
761 | if (j && !(j & 3)) | |
762 | fprintf(stderr, " %02x", buffer[i + j]); | |
763 | else | |
764 | fprintf(stderr, " %02x", buffer[i + j]); | |
765 | } | |
766 | ||
767 | while (j < 16) | |
768 | { | |
769 | if (j && !(j & 3)) | |
770 | fputs(" ", stderr); | |
771 | else | |
772 | fputs(" ", stderr); | |
773 | ||
774 | j ++; | |
775 | } | |
776 | ||
777 | fputs(" ", stderr); | |
778 | ||
7e86f2f6 | 779 | for (j = 0; j < 16 && (i + j) < len; j ++) |
ac884b6a MS |
780 | if (buffer[i + j] < ' ' || buffer[i + j] >= 0x7f) |
781 | putc('.', stderr); | |
782 | else | |
783 | putc(buffer[i + j], stderr); | |
784 | ||
785 | putc('\n', stderr); | |
786 | } | |
787 | } | |
788 | ||
789 | if (indent == 0) | |
790 | fprintf(stderr, "%sMessage:\n", prefix); | |
791 | ||
792 | bufend = buffer + len; | |
793 | ||
794 | while (buffer < bufend) | |
795 | { | |
796 | /* | |
797 | * Get value type... | |
798 | */ | |
799 | ||
7e86f2f6 | 800 | value_type = (unsigned char)asn1_get_type(&buffer, bufend); |
ac884b6a MS |
801 | value_length = asn1_get_length(&buffer, bufend); |
802 | ||
803 | switch (value_type) | |
804 | { | |
805 | case CUPS_ASN1_BOOLEAN : | |
806 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
807 | ||
808 | fprintf(stderr, "%s%*sBOOLEAN %d bytes %d\n", prefix, indent, "", | |
809 | value_length, integer); | |
810 | break; | |
811 | ||
812 | case CUPS_ASN1_INTEGER : | |
813 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
814 | ||
815 | fprintf(stderr, "%s%*sINTEGER %d bytes %d\n", prefix, indent, "", | |
816 | value_length, integer); | |
817 | break; | |
818 | ||
819 | case CUPS_ASN1_COUNTER : | |
820 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
821 | ||
822 | fprintf(stderr, "%s%*sCOUNTER %d bytes %u\n", prefix, indent, "", | |
823 | value_length, (unsigned)integer); | |
824 | break; | |
825 | ||
826 | case CUPS_ASN1_GAUGE : | |
827 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
828 | ||
829 | fprintf(stderr, "%s%*sGAUGE %d bytes %u\n", prefix, indent, "", | |
830 | value_length, (unsigned)integer); | |
831 | break; | |
832 | ||
833 | case CUPS_ASN1_TIMETICKS : | |
834 | integer = asn1_get_integer(&buffer, bufend, value_length); | |
835 | ||
836 | fprintf(stderr, "%s%*sTIMETICKS %d bytes %u\n", prefix, indent, "", | |
837 | value_length, (unsigned)integer); | |
838 | break; | |
839 | ||
840 | case CUPS_ASN1_OCTET_STRING : | |
841 | fprintf(stderr, "%s%*sOCTET STRING %d bytes \"%s\"\n", prefix, | |
842 | indent, "", value_length, | |
843 | asn1_get_string(&buffer, bufend, value_length, string, | |
844 | sizeof(string))); | |
845 | break; | |
846 | ||
847 | case CUPS_ASN1_HEX_STRING : | |
848 | asn1_get_string(&buffer, bufend, value_length, string, | |
849 | sizeof(string)); | |
850 | fprintf(stderr, "%s%*sHex-STRING %d bytes", prefix, | |
851 | indent, "", value_length); | |
852 | for (i = 0; i < value_length; i ++) | |
853 | fprintf(stderr, " %02X", string[i] & 255); | |
854 | putc('\n', stderr); | |
855 | break; | |
856 | ||
857 | case CUPS_ASN1_NULL_VALUE : | |
858 | fprintf(stderr, "%s%*sNULL VALUE %d bytes\n", prefix, indent, "", | |
859 | value_length); | |
860 | ||
861 | buffer += value_length; | |
862 | break; | |
863 | ||
864 | case CUPS_ASN1_OID : | |
865 | integer = asn1_get_oid(&buffer, bufend, value_length, oid, | |
866 | CUPS_SNMP_MAX_OID); | |
867 | ||
868 | fprintf(stderr, "%s%*sOID %d bytes ", prefix, indent, "", | |
869 | value_length); | |
7e86f2f6 | 870 | for (i = 0; i < (unsigned)integer; i ++) |
ac884b6a MS |
871 | fprintf(stderr, ".%d", oid[i]); |
872 | putc('\n', stderr); | |
873 | break; | |
874 | ||
875 | case CUPS_ASN1_SEQUENCE : | |
876 | fprintf(stderr, "%s%*sSEQUENCE %d bytes\n", prefix, indent, "", | |
877 | value_length); | |
878 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
879 | ||
880 | buffer += value_length; | |
881 | break; | |
882 | ||
883 | case CUPS_ASN1_GET_NEXT_REQUEST : | |
884 | fprintf(stderr, "%s%*sGet-Next-Request-PDU %d bytes\n", prefix, | |
885 | indent, "", value_length); | |
886 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
887 | ||
888 | buffer += value_length; | |
889 | break; | |
890 | ||
891 | case CUPS_ASN1_GET_REQUEST : | |
892 | fprintf(stderr, "%s%*sGet-Request-PDU %d bytes\n", prefix, indent, "", | |
893 | value_length); | |
894 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
895 | ||
896 | buffer += value_length; | |
897 | break; | |
898 | ||
899 | case CUPS_ASN1_GET_RESPONSE : | |
900 | fprintf(stderr, "%s%*sGet-Response-PDU %d bytes\n", prefix, indent, | |
901 | "", value_length); | |
902 | asn1_debug(prefix, buffer, value_length, indent + 4); | |
903 | ||
904 | buffer += value_length; | |
905 | break; | |
906 | ||
907 | default : | |
908 | fprintf(stderr, "%s%*sUNKNOWN(%x) %d bytes\n", prefix, indent, "", | |
909 | value_type, value_length); | |
910 | ||
911 | buffer += value_length; | |
912 | break; | |
913 | } | |
914 | } | |
915 | } | |
88f9aafc | 916 | |
ac884b6a | 917 | |
91c84a35 MS |
918 | /* |
919 | * 'asn1_decode_snmp()' - Decode a SNMP packet. | |
920 | */ | |
921 | ||
922 | static int /* O - 0 on success, -1 on error */ | |
923 | asn1_decode_snmp(unsigned char *buffer, /* I - Buffer */ | |
924 | size_t len, /* I - Size of buffer */ | |
925 | cups_snmp_t *packet) /* I - SNMP packet */ | |
926 | { | |
927 | unsigned char *bufptr, /* Pointer into the data */ | |
928 | *bufend; /* End of data */ | |
7e86f2f6 | 929 | unsigned length; /* Length of value */ |
91c84a35 MS |
930 | |
931 | ||
932 | /* | |
933 | * Initialize the decoding... | |
934 | */ | |
935 | ||
936 | memset(packet, 0, sizeof(cups_snmp_t)); | |
ac884b6a | 937 | packet->object_name[0] = -1; |
91c84a35 MS |
938 | |
939 | bufptr = buffer; | |
940 | bufend = buffer + len; | |
941 | ||
942 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
943 | snmp_set_error(packet, _("Packet does not start with SEQUENCE")); | |
944 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
945 | snmp_set_error(packet, _("SEQUENCE uses indefinite length")); | |
946 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
947 | snmp_set_error(packet, _("No version number")); | |
948 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
949 | snmp_set_error(packet, _("Version uses indefinite length")); | |
950 | else if ((packet->version = asn1_get_integer(&bufptr, bufend, length)) | |
951 | != CUPS_SNMP_VERSION_1) | |
952 | snmp_set_error(packet, _("Bad SNMP version number")); | |
953 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_OCTET_STRING) | |
954 | snmp_set_error(packet, _("No community name")); | |
955 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
956 | snmp_set_error(packet, _("Community name uses indefinite length")); | |
957 | else | |
958 | { | |
959 | asn1_get_string(&bufptr, bufend, length, packet->community, | |
960 | sizeof(packet->community)); | |
961 | ||
7e86f2f6 | 962 | if ((packet->request_type = (cups_asn1_t)asn1_get_type(&bufptr, bufend)) |
91c84a35 MS |
963 | != CUPS_ASN1_GET_RESPONSE) |
964 | snmp_set_error(packet, _("Packet does not contain a Get-Response-PDU")); | |
965 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
966 | snmp_set_error(packet, _("Get-Response-PDU uses indefinite length")); | |
967 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
968 | snmp_set_error(packet, _("No request-id")); | |
969 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
970 | snmp_set_error(packet, _("request-id uses indefinite length")); | |
971 | else | |
972 | { | |
7e86f2f6 | 973 | packet->request_id = (unsigned)asn1_get_integer(&bufptr, bufend, length); |
91c84a35 MS |
974 | |
975 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
976 | snmp_set_error(packet, _("No error-status")); | |
977 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
978 | snmp_set_error(packet, _("error-status uses indefinite length")); | |
979 | else | |
980 | { | |
981 | packet->error_status = asn1_get_integer(&bufptr, bufend, length); | |
982 | ||
983 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_INTEGER) | |
984 | snmp_set_error(packet, _("No error-index")); | |
985 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
986 | snmp_set_error(packet, _("error-index uses indefinite length")); | |
987 | else | |
988 | { | |
989 | packet->error_index = asn1_get_integer(&bufptr, bufend, length); | |
990 | ||
991 | if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
992 | snmp_set_error(packet, _("No variable-bindings SEQUENCE")); | |
993 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
994 | snmp_set_error(packet, | |
995 | _("variable-bindings uses indefinite length")); | |
996 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_SEQUENCE) | |
997 | snmp_set_error(packet, _("No VarBind SEQUENCE")); | |
998 | else if (asn1_get_length(&bufptr, bufend) == 0) | |
999 | snmp_set_error(packet, _("VarBind uses indefinite length")); | |
1000 | else if (asn1_get_type(&bufptr, bufend) != CUPS_ASN1_OID) | |
1001 | snmp_set_error(packet, _("No name OID")); | |
1002 | else if ((length = asn1_get_length(&bufptr, bufend)) == 0) | |
1003 | snmp_set_error(packet, _("Name OID uses indefinite length")); | |
1004 | else | |
1005 | { | |
1006 | asn1_get_oid(&bufptr, bufend, length, packet->object_name, | |
1007 | CUPS_SNMP_MAX_OID); | |
1008 | ||
7e86f2f6 | 1009 | packet->object_type = (cups_asn1_t)asn1_get_type(&bufptr, bufend); |
91c84a35 MS |
1010 | |
1011 | if ((length = asn1_get_length(&bufptr, bufend)) == 0 && | |
1012 | packet->object_type != CUPS_ASN1_NULL_VALUE && | |
1013 | packet->object_type != CUPS_ASN1_OCTET_STRING) | |
1014 | snmp_set_error(packet, _("Value uses indefinite length")); | |
1015 | else | |
1016 | { | |
1017 | switch (packet->object_type) | |
1018 | { | |
1019 | case CUPS_ASN1_BOOLEAN : | |
1020 | packet->object_value.boolean = | |
1021 | asn1_get_integer(&bufptr, bufend, length); | |
1022 | break; | |
1023 | ||
1024 | case CUPS_ASN1_INTEGER : | |
1025 | packet->object_value.integer = | |
1026 | asn1_get_integer(&bufptr, bufend, length); | |
1027 | break; | |
1028 | ||
1029 | case CUPS_ASN1_NULL_VALUE : | |
1030 | break; | |
1031 | ||
1032 | case CUPS_ASN1_OCTET_STRING : | |
d1c13e16 MS |
1033 | case CUPS_ASN1_BIT_STRING : |
1034 | case CUPS_ASN1_HEX_STRING : | |
1035 | packet->object_value.string.num_bytes = length; | |
91c84a35 | 1036 | asn1_get_string(&bufptr, bufend, length, |
d1c13e16 | 1037 | (char *)packet->object_value.string.bytes, |
f3c17241 | 1038 | sizeof(packet->object_value.string.bytes)); |
91c84a35 MS |
1039 | break; |
1040 | ||
1041 | case CUPS_ASN1_OID : | |
1042 | asn1_get_oid(&bufptr, bufend, length, | |
1043 | packet->object_value.oid, CUPS_SNMP_MAX_OID); | |
1044 | break; | |
1045 | ||
1046 | case CUPS_ASN1_COUNTER : | |
1047 | packet->object_value.counter = | |
1048 | asn1_get_integer(&bufptr, bufend, length); | |
1049 | break; | |
1050 | ||
1051 | case CUPS_ASN1_GAUGE : | |
1052 | packet->object_value.gauge = | |
7e86f2f6 | 1053 | (unsigned)asn1_get_integer(&bufptr, bufend, length); |
91c84a35 MS |
1054 | break; |
1055 | ||
ac884b6a MS |
1056 | case CUPS_ASN1_TIMETICKS : |
1057 | packet->object_value.timeticks = | |
7e86f2f6 | 1058 | (unsigned)asn1_get_integer(&bufptr, bufend, length); |
ac884b6a MS |
1059 | break; |
1060 | ||
91c84a35 MS |
1061 | default : |
1062 | snmp_set_error(packet, _("Unsupported value type")); | |
1063 | break; | |
1064 | } | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | return (packet->error ? -1 : 0); | |
1073 | } | |
1074 | ||
1075 | ||
91c84a35 MS |
1076 | /* |
1077 | * 'asn1_encode_snmp()' - Encode a SNMP packet. | |
1078 | */ | |
1079 | ||
1080 | static int /* O - Length on success, -1 on error */ | |
1081 | asn1_encode_snmp(unsigned char *buffer, /* I - Buffer */ | |
1082 | size_t bufsize, /* I - Size of buffer */ | |
1083 | cups_snmp_t *packet) /* I - SNMP packet */ | |
1084 | { | |
1085 | unsigned char *bufptr; /* Pointer into buffer */ | |
7e86f2f6 | 1086 | unsigned total, /* Total length */ |
91c84a35 MS |
1087 | msglen, /* Length of entire message */ |
1088 | commlen, /* Length of community string */ | |
1089 | reqlen, /* Length of request */ | |
1090 | listlen, /* Length of variable list */ | |
1091 | varlen, /* Length of variable */ | |
1092 | namelen, /* Length of object name OID */ | |
1093 | valuelen; /* Length of object value */ | |
1094 | ||
1095 | ||
1096 | /* | |
1097 | * Get the lengths of the community string, OID, and message... | |
1098 | */ | |
1099 | ||
ac884b6a | 1100 | |
91c84a35 MS |
1101 | namelen = asn1_size_oid(packet->object_name); |
1102 | ||
1103 | switch (packet->object_type) | |
1104 | { | |
1105 | case CUPS_ASN1_NULL_VALUE : | |
1106 | valuelen = 0; | |
1107 | break; | |
1108 | ||
1109 | case CUPS_ASN1_BOOLEAN : | |
1110 | valuelen = asn1_size_integer(packet->object_value.boolean); | |
1111 | break; | |
1112 | ||
1113 | case CUPS_ASN1_INTEGER : | |
1114 | valuelen = asn1_size_integer(packet->object_value.integer); | |
1115 | break; | |
1116 | ||
1117 | case CUPS_ASN1_OCTET_STRING : | |
d1c13e16 | 1118 | valuelen = packet->object_value.string.num_bytes; |
91c84a35 MS |
1119 | break; |
1120 | ||
1121 | case CUPS_ASN1_OID : | |
1122 | valuelen = asn1_size_oid(packet->object_value.oid); | |
1123 | break; | |
1124 | ||
1125 | default : | |
1126 | packet->error = "Unknown object type"; | |
1127 | return (-1); | |
1128 | } | |
1129 | ||
1130 | varlen = 1 + asn1_size_length(namelen) + namelen + | |
1131 | 1 + asn1_size_length(valuelen) + valuelen; | |
1132 | listlen = 1 + asn1_size_length(varlen) + varlen; | |
7e86f2f6 | 1133 | reqlen = 2 + asn1_size_integer((int)packet->request_id) + |
91c84a35 MS |
1134 | 2 + asn1_size_integer(packet->error_status) + |
1135 | 2 + asn1_size_integer(packet->error_index) + | |
1136 | 1 + asn1_size_length(listlen) + listlen; | |
7e86f2f6 | 1137 | commlen = (unsigned)strlen(packet->community); |
91c84a35 MS |
1138 | msglen = 2 + asn1_size_integer(packet->version) + |
1139 | 1 + asn1_size_length(commlen) + commlen + | |
1140 | 1 + asn1_size_length(reqlen) + reqlen; | |
1141 | total = 1 + asn1_size_length(msglen) + msglen; | |
1142 | ||
7e86f2f6 | 1143 | if (total > bufsize) |
91c84a35 MS |
1144 | { |
1145 | packet->error = "Message too large for buffer"; | |
1146 | return (-1); | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Then format the message... | |
1151 | */ | |
1152 | ||
1153 | bufptr = buffer; | |
1154 | ||
1155 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* SNMPv1 message header */ | |
1156 | asn1_set_length(&bufptr, msglen); | |
1157 | ||
1158 | asn1_set_integer(&bufptr, packet->version); | |
1159 | /* version */ | |
1160 | ||
1161 | *bufptr++ = CUPS_ASN1_OCTET_STRING; /* community */ | |
1162 | asn1_set_length(&bufptr, commlen); | |
1163 | memcpy(bufptr, packet->community, commlen); | |
1164 | bufptr += commlen; | |
1165 | ||
ac884b6a | 1166 | *bufptr++ = packet->request_type; /* Get-Request-PDU/Get-Next-Request-PDU */ |
91c84a35 MS |
1167 | asn1_set_length(&bufptr, reqlen); |
1168 | ||
7e86f2f6 | 1169 | asn1_set_integer(&bufptr, (int)packet->request_id); |
91c84a35 MS |
1170 | |
1171 | asn1_set_integer(&bufptr, packet->error_status); | |
1172 | ||
1173 | asn1_set_integer(&bufptr, packet->error_index); | |
1174 | ||
1175 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* variable-bindings */ | |
1176 | asn1_set_length(&bufptr, listlen); | |
1177 | ||
1178 | *bufptr++ = CUPS_ASN1_SEQUENCE; /* variable */ | |
1179 | asn1_set_length(&bufptr, varlen); | |
1180 | ||
1181 | asn1_set_oid(&bufptr, packet->object_name); | |
1182 | /* ObjectName */ | |
1183 | ||
1184 | switch (packet->object_type) | |
1185 | { | |
1186 | case CUPS_ASN1_NULL_VALUE : | |
1187 | *bufptr++ = CUPS_ASN1_NULL_VALUE; | |
1188 | /* ObjectValue */ | |
1189 | *bufptr++ = 0; /* Length */ | |
1190 | break; | |
1191 | ||
1192 | case CUPS_ASN1_BOOLEAN : | |
1193 | asn1_set_integer(&bufptr, packet->object_value.boolean); | |
1194 | break; | |
1195 | ||
1196 | case CUPS_ASN1_INTEGER : | |
1197 | asn1_set_integer(&bufptr, packet->object_value.integer); | |
1198 | break; | |
1199 | ||
1200 | case CUPS_ASN1_OCTET_STRING : | |
1201 | *bufptr++ = CUPS_ASN1_OCTET_STRING; | |
1202 | asn1_set_length(&bufptr, valuelen); | |
d1c13e16 | 1203 | memcpy(bufptr, packet->object_value.string.bytes, valuelen); |
91c84a35 MS |
1204 | bufptr += valuelen; |
1205 | break; | |
1206 | ||
1207 | case CUPS_ASN1_OID : | |
1208 | asn1_set_oid(&bufptr, packet->object_value.oid); | |
1209 | break; | |
1210 | ||
1211 | default : | |
1212 | break; | |
1213 | } | |
1214 | ||
7e86f2f6 | 1215 | return ((int)(bufptr - buffer)); |
91c84a35 MS |
1216 | } |
1217 | ||
1218 | ||
1219 | /* | |
1220 | * 'asn1_get_integer()' - Get an integer value. | |
1221 | */ | |
1222 | ||
1223 | static int /* O - Integer value */ | |
1224 | asn1_get_integer( | |
1225 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1226 | unsigned char *bufend, /* I - End of buffer */ | |
7e86f2f6 | 1227 | unsigned length) /* I - Length of value */ |
91c84a35 MS |
1228 | { |
1229 | int value; /* Integer value */ | |
1230 | ||
1231 | ||
41681883 MS |
1232 | if (length > sizeof(int)) |
1233 | { | |
1234 | (*buffer) += length; | |
1235 | return (0); | |
1236 | } | |
1237 | ||
29bda83e | 1238 | for (value = (**buffer & 0x80) ? ~0 : 0; |
91c84a35 MS |
1239 | length > 0 && *buffer < bufend; |
1240 | length --, (*buffer) ++) | |
29bda83e | 1241 | value = ((value & 0xffffff) << 8) | **buffer; |
91c84a35 MS |
1242 | |
1243 | return (value); | |
1244 | } | |
1245 | ||
1246 | ||
1247 | /* | |
1248 | * 'asn1_get_length()' - Get a value length. | |
1249 | */ | |
1250 | ||
41681883 | 1251 | static unsigned /* O - Length */ |
91c84a35 MS |
1252 | asn1_get_length(unsigned char **buffer, /* IO - Pointer in buffer */ |
1253 | unsigned char *bufend) /* I - End of buffer */ | |
1254 | { | |
41681883 | 1255 | unsigned length; /* Length */ |
91c84a35 MS |
1256 | |
1257 | ||
1258 | length = **buffer; | |
1259 | (*buffer) ++; | |
1260 | ||
1261 | if (length & 128) | |
41681883 MS |
1262 | { |
1263 | int count; /* Number of bytes for length */ | |
1264 | ||
1265 | ||
1266 | if ((count = length & 127) > sizeof(unsigned)) | |
1267 | { | |
1268 | (*buffer) += count; | |
1269 | return (0); | |
1270 | } | |
1271 | ||
1272 | for (length = 0; | |
1273 | count > 0 && *buffer < bufend; | |
1274 | count --, (*buffer) ++) | |
1275 | length = (length << 8) | **buffer; | |
1276 | } | |
91c84a35 MS |
1277 | |
1278 | return (length); | |
1279 | } | |
1280 | ||
1281 | ||
1282 | /* | |
1283 | * 'asn1_get_oid()' - Get an OID value. | |
1284 | */ | |
1285 | ||
ac884b6a | 1286 | static int /* O - Number of OIDs */ |
91c84a35 MS |
1287 | asn1_get_oid( |
1288 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1289 | unsigned char *bufend, /* I - End of buffer */ | |
7e86f2f6 | 1290 | unsigned length, /* I - Length of value */ |
91c84a35 MS |
1291 | int *oid, /* I - OID buffer */ |
1292 | int oidsize) /* I - Size of OID buffer */ | |
1293 | { | |
1294 | unsigned char *valend; /* End of value */ | |
ac884b6a MS |
1295 | int *oidptr, /* Current OID */ |
1296 | *oidend; /* End of OID buffer */ | |
91c84a35 MS |
1297 | int number; /* OID number */ |
1298 | ||
1299 | ||
1300 | valend = *buffer + length; | |
ac884b6a | 1301 | oidptr = oid; |
91c84a35 MS |
1302 | oidend = oid + oidsize - 1; |
1303 | ||
1304 | if (valend > bufend) | |
1305 | valend = bufend; | |
1306 | ||
1307 | number = asn1_get_packed(buffer, bufend); | |
1308 | ||
1309 | if (number < 80) | |
1310 | { | |
ac884b6a MS |
1311 | *oidptr++ = number / 40; |
1312 | number = number % 40; | |
1313 | *oidptr++ = number; | |
91c84a35 MS |
1314 | } |
1315 | else | |
1316 | { | |
ac884b6a MS |
1317 | *oidptr++ = 2; |
1318 | number -= 80; | |
1319 | *oidptr++ = number; | |
91c84a35 MS |
1320 | } |
1321 | ||
1322 | while (*buffer < valend) | |
1323 | { | |
1324 | number = asn1_get_packed(buffer, bufend); | |
1325 | ||
ac884b6a MS |
1326 | if (oidptr < oidend) |
1327 | *oidptr++ = number; | |
91c84a35 MS |
1328 | } |
1329 | ||
ac884b6a | 1330 | *oidptr = -1; |
91c84a35 | 1331 | |
7e86f2f6 | 1332 | return ((int)(oidptr - oid)); |
91c84a35 MS |
1333 | } |
1334 | ||
1335 | ||
1336 | /* | |
1337 | * 'asn1_get_packed()' - Get a packed integer value. | |
1338 | */ | |
1339 | ||
1340 | static int /* O - Value */ | |
1341 | asn1_get_packed( | |
1342 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1343 | unsigned char *bufend) /* I - End of buffer */ | |
1344 | { | |
1345 | int value; /* Value */ | |
1346 | ||
1347 | ||
1348 | value = 0; | |
1349 | ||
1350 | while ((**buffer & 128) && *buffer < bufend) | |
1351 | { | |
1352 | value = (value << 7) | (**buffer & 127); | |
1353 | (*buffer) ++; | |
1354 | } | |
1355 | ||
1356 | if (*buffer < bufend) | |
1357 | { | |
1358 | value = (value << 7) | **buffer; | |
1359 | (*buffer) ++; | |
1360 | } | |
1361 | ||
1362 | return (value); | |
1363 | } | |
1364 | ||
1365 | ||
1366 | /* | |
1367 | * 'asn1_get_string()' - Get a string value. | |
1368 | */ | |
1369 | ||
1370 | static char * /* O - String */ | |
1371 | asn1_get_string( | |
1372 | unsigned char **buffer, /* IO - Pointer in buffer */ | |
1373 | unsigned char *bufend, /* I - End of buffer */ | |
7e86f2f6 | 1374 | unsigned length, /* I - Value length */ |
91c84a35 | 1375 | char *string, /* I - String buffer */ |
7e86f2f6 | 1376 | size_t strsize) /* I - String buffer size */ |
91c84a35 | 1377 | { |
7e86f2f6 MS |
1378 | if (length > (unsigned)(bufend - *buffer)) |
1379 | length = (unsigned)(bufend - *buffer); | |
91c84a35 | 1380 | |
7e86f2f6 | 1381 | if (length < strsize) |
91c84a35 MS |
1382 | { |
1383 | /* | |
1384 | * String is smaller than the buffer... | |
1385 | */ | |
1386 | ||
1387 | if (length > 0) | |
1388 | memcpy(string, *buffer, length); | |
1389 | ||
1390 | string[length] = '\0'; | |
1391 | } | |
1392 | else | |
1393 | { | |
1394 | /* | |
1395 | * String is larger than the buffer... | |
1396 | */ | |
1397 | ||
1398 | memcpy(string, *buffer, strsize - 1); | |
1399 | string[strsize - 1] = '\0'; | |
1400 | } | |
1401 | ||
1402 | if (length > 0) | |
1403 | (*buffer) += length; | |
1404 | ||
7e86f2f6 | 1405 | return (string); |
91c84a35 MS |
1406 | } |
1407 | ||
1408 | ||
1409 | /* | |
1410 | * 'asn1_get_type()' - Get a value type. | |
1411 | */ | |
1412 | ||
1413 | static int /* O - Type */ | |
1414 | asn1_get_type(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1415 | unsigned char *bufend) /* I - End of buffer */ | |
1416 | { | |
1417 | int type; /* Type */ | |
1418 | ||
1419 | ||
1420 | type = **buffer; | |
1421 | (*buffer) ++; | |
1422 | ||
1423 | if ((type & 31) == 31) | |
1424 | type = asn1_get_packed(buffer, bufend); | |
1425 | ||
1426 | return (type); | |
1427 | } | |
1428 | ||
1429 | ||
1430 | /* | |
1431 | * 'asn1_set_integer()' - Set an integer value. | |
1432 | */ | |
1433 | ||
1434 | static void | |
1435 | asn1_set_integer(unsigned char **buffer,/* IO - Pointer in buffer */ | |
1436 | int integer) /* I - Integer value */ | |
1437 | { | |
1438 | **buffer = CUPS_ASN1_INTEGER; | |
1439 | (*buffer) ++; | |
1440 | ||
1441 | if (integer > 0x7fffff || integer < -0x800000) | |
1442 | { | |
1443 | **buffer = 4; | |
1444 | (*buffer) ++; | |
7e86f2f6 | 1445 | **buffer = (unsigned char)(integer >> 24); |
91c84a35 | 1446 | (*buffer) ++; |
7e86f2f6 | 1447 | **buffer = (unsigned char)(integer >> 16); |
91c84a35 | 1448 | (*buffer) ++; |
7e86f2f6 | 1449 | **buffer = (unsigned char)(integer >> 8); |
91c84a35 | 1450 | (*buffer) ++; |
7e86f2f6 | 1451 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1452 | (*buffer) ++; |
1453 | } | |
1454 | else if (integer > 0x7fff || integer < -0x8000) | |
1455 | { | |
1456 | **buffer = 3; | |
1457 | (*buffer) ++; | |
7e86f2f6 | 1458 | **buffer = (unsigned char)(integer >> 16); |
91c84a35 | 1459 | (*buffer) ++; |
7e86f2f6 | 1460 | **buffer = (unsigned char)(integer >> 8); |
91c84a35 | 1461 | (*buffer) ++; |
7e86f2f6 | 1462 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1463 | (*buffer) ++; |
1464 | } | |
1465 | else if (integer > 0x7f || integer < -0x80) | |
1466 | { | |
1467 | **buffer = 2; | |
1468 | (*buffer) ++; | |
7e86f2f6 | 1469 | **buffer = (unsigned char)(integer >> 8); |
91c84a35 | 1470 | (*buffer) ++; |
7e86f2f6 | 1471 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1472 | (*buffer) ++; |
1473 | } | |
1474 | else | |
1475 | { | |
1476 | **buffer = 1; | |
1477 | (*buffer) ++; | |
7e86f2f6 | 1478 | **buffer = (unsigned char)integer; |
91c84a35 MS |
1479 | (*buffer) ++; |
1480 | } | |
1481 | } | |
1482 | ||
1483 | ||
1484 | /* | |
1485 | * 'asn1_set_length()' - Set a value length. | |
1486 | */ | |
1487 | ||
1488 | static void | |
1489 | asn1_set_length(unsigned char **buffer, /* IO - Pointer in buffer */ | |
41681883 | 1490 | unsigned length) /* I - Length value */ |
91c84a35 MS |
1491 | { |
1492 | if (length > 255) | |
1493 | { | |
1494 | **buffer = 0x82; /* 2-byte length */ | |
1495 | (*buffer) ++; | |
7e86f2f6 | 1496 | **buffer = (unsigned char)(length >> 8); |
91c84a35 | 1497 | (*buffer) ++; |
7e86f2f6 | 1498 | **buffer = (unsigned char)length; |
91c84a35 MS |
1499 | (*buffer) ++; |
1500 | } | |
1501 | else if (length > 127) | |
1502 | { | |
1503 | **buffer = 0x81; /* 1-byte length */ | |
1504 | (*buffer) ++; | |
7e86f2f6 | 1505 | **buffer = (unsigned char)length; |
91c84a35 MS |
1506 | (*buffer) ++; |
1507 | } | |
1508 | else | |
1509 | { | |
7e86f2f6 | 1510 | **buffer = (unsigned char)length; /* Length */ |
91c84a35 MS |
1511 | (*buffer) ++; |
1512 | } | |
1513 | } | |
1514 | ||
1515 | ||
1516 | /* | |
1517 | * 'asn1_set_oid()' - Set an OID value. | |
1518 | */ | |
1519 | ||
1520 | static void | |
1521 | asn1_set_oid(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1522 | const int *oid) /* I - OID value */ | |
1523 | { | |
1524 | **buffer = CUPS_ASN1_OID; | |
1525 | (*buffer) ++; | |
1526 | ||
1527 | asn1_set_length(buffer, asn1_size_oid(oid)); | |
1528 | ||
ac884b6a MS |
1529 | if (oid[1] < 0) |
1530 | { | |
1531 | asn1_set_packed(buffer, oid[0] * 40); | |
1532 | return; | |
1533 | } | |
1534 | ||
91c84a35 MS |
1535 | asn1_set_packed(buffer, oid[0] * 40 + oid[1]); |
1536 | ||
ac884b6a | 1537 | for (oid += 2; *oid >= 0; oid ++) |
91c84a35 MS |
1538 | asn1_set_packed(buffer, *oid); |
1539 | } | |
1540 | ||
1541 | ||
1542 | /* | |
1543 | * 'asn1_set_packed()' - Set a packed integer value. | |
1544 | */ | |
1545 | ||
1546 | static void | |
1547 | asn1_set_packed(unsigned char **buffer, /* IO - Pointer in buffer */ | |
1548 | int integer) /* I - Integer value */ | |
1549 | { | |
1550 | if (integer > 0xfffffff) | |
1551 | { | |
ac884b6a | 1552 | **buffer = ((integer >> 28) & 0x7f) | 0x80; |
91c84a35 MS |
1553 | (*buffer) ++; |
1554 | } | |
1555 | ||
1556 | if (integer > 0x1fffff) | |
1557 | { | |
ac884b6a | 1558 | **buffer = ((integer >> 21) & 0x7f) | 0x80; |
91c84a35 MS |
1559 | (*buffer) ++; |
1560 | } | |
1561 | ||
1562 | if (integer > 0x3fff) | |
1563 | { | |
ac884b6a | 1564 | **buffer = ((integer >> 14) & 0x7f) | 0x80; |
91c84a35 MS |
1565 | (*buffer) ++; |
1566 | } | |
1567 | ||
1568 | if (integer > 0x7f) | |
1569 | { | |
ac884b6a | 1570 | **buffer = ((integer >> 7) & 0x7f) | 0x80; |
91c84a35 MS |
1571 | (*buffer) ++; |
1572 | } | |
1573 | ||
1574 | **buffer = integer & 0x7f; | |
1575 | (*buffer) ++; | |
1576 | } | |
1577 | ||
1578 | ||
1579 | /* | |
1580 | * 'asn1_size_integer()' - Figure out the number of bytes needed for an | |
1581 | * integer value. | |
1582 | */ | |
1583 | ||
7e86f2f6 | 1584 | static unsigned /* O - Size in bytes */ |
91c84a35 MS |
1585 | asn1_size_integer(int integer) /* I - Integer value */ |
1586 | { | |
1587 | if (integer > 0x7fffff || integer < -0x800000) | |
1588 | return (4); | |
1589 | else if (integer > 0x7fff || integer < -0x8000) | |
1590 | return (3); | |
1591 | else if (integer > 0x7f || integer < -0x80) | |
1592 | return (2); | |
1593 | else | |
1594 | return (1); | |
1595 | } | |
1596 | ||
1597 | ||
1598 | /* | |
1599 | * 'asn1_size_length()' - Figure out the number of bytes needed for a | |
1600 | * length value. | |
1601 | */ | |
1602 | ||
7e86f2f6 MS |
1603 | static unsigned /* O - Size in bytes */ |
1604 | asn1_size_length(unsigned length) /* I - Length value */ | |
91c84a35 MS |
1605 | { |
1606 | if (length > 0xff) | |
1607 | return (3); | |
1608 | else if (length > 0x7f) | |
1609 | return (2); | |
1610 | else | |
1611 | return (1); | |
1612 | } | |
1613 | ||
1614 | ||
1615 | /* | |
9befde09 | 1616 | * 'asn1_size_oid()' - Figure out the number of bytes needed for an |
91c84a35 MS |
1617 | * OID value. |
1618 | */ | |
1619 | ||
7e86f2f6 | 1620 | static unsigned /* O - Size in bytes */ |
91c84a35 MS |
1621 | asn1_size_oid(const int *oid) /* I - OID value */ |
1622 | { | |
7e86f2f6 | 1623 | unsigned length; /* Length of value */ |
91c84a35 MS |
1624 | |
1625 | ||
ac884b6a MS |
1626 | if (oid[1] < 0) |
1627 | return (asn1_size_packed(oid[0] * 40)); | |
1628 | ||
1629 | for (length = asn1_size_packed(oid[0] * 40 + oid[1]), oid += 2; | |
1630 | *oid >= 0; | |
1631 | oid ++) | |
91c84a35 MS |
1632 | length += asn1_size_packed(*oid); |
1633 | ||
1634 | return (length); | |
1635 | } | |
1636 | ||
1637 | ||
1638 | /* | |
1639 | * 'asn1_size_packed()' - Figure out the number of bytes needed for a | |
1640 | * packed integer value. | |
1641 | */ | |
1642 | ||
7e86f2f6 | 1643 | static unsigned /* O - Size in bytes */ |
91c84a35 MS |
1644 | asn1_size_packed(int integer) /* I - Integer value */ |
1645 | { | |
1646 | if (integer > 0xfffffff) | |
1647 | return (5); | |
1648 | else if (integer > 0x1fffff) | |
1649 | return (4); | |
1650 | else if (integer > 0x3fff) | |
1651 | return (3); | |
1652 | else if (integer > 0x7f) | |
1653 | return (2); | |
1654 | else | |
1655 | return (1); | |
1656 | } | |
1657 | ||
1658 | ||
1659 | /* | |
1660 | * 'snmp_set_error()' - Set the localized error for a packet. | |
1661 | */ | |
1662 | ||
1663 | static void | |
1664 | snmp_set_error(cups_snmp_t *packet, /* I - Packet */ | |
1665 | const char *message) /* I - Error message */ | |
1666 | { | |
1667 | _cups_globals_t *cg = _cupsGlobals(); /* Global data */ | |
1668 | ||
1669 | ||
1670 | if (!cg->lang_default) | |
1671 | cg->lang_default = cupsLangDefault(); | |
1672 | ||
1673 | packet->error = _cupsLangString(cg->lang_default, message); | |
1674 | } |