Commit | Line | Data |
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49705576 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
49705576 FD |
3 | * |
4 | * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com> | |
49705576 FD |
5 | */ |
6 | ||
7 | #define _GNU_SOURCE | |
8 | #define _LGPL_SOURCE | |
9 | #include <stddef.h> | |
10 | ||
11 | #define MSGPACK_FIXSTR_ID_MASK 0xA0 | |
12 | #define MSGPACK_FIXMAP_ID_MASK 0x80 | |
13 | #define MSGPACK_FIXARRAY_ID_MASK 0x90 | |
14 | ||
15 | #define MSGPACK_NIL_ID 0xC0 | |
16 | #define MSGPACK_FALSE_ID 0xC2 | |
17 | #define MSGPACK_TRUE_ID 0xC3 | |
18 | #define MSGPACK_MAP16_ID 0xDE | |
19 | #define MSGPACK_ARRAY16_ID 0xDC | |
20 | ||
21 | #define MSGPACK_UINT8_ID 0xCC | |
22 | #define MSGPACK_UINT16_ID 0xCD | |
23 | #define MSGPACK_UINT32_ID 0xCE | |
24 | #define MSGPACK_UINT64_ID 0xCF | |
25 | ||
26 | #define MSGPACK_INT8_ID 0xD0 | |
27 | #define MSGPACK_INT16_ID 0xD1 | |
28 | #define MSGPACK_INT32_ID 0xD2 | |
29 | #define MSGPACK_INT64_ID 0xD3 | |
30 | ||
31 | #define MSGPACK_FLOAT64_ID 0xCB | |
32 | #define MSGPACK_STR16_ID 0xDA | |
33 | ||
34 | #define MSGPACK_FIXINT_MAX ((1 << 7) - 1) | |
35 | #define MSGPACK_FIXINT_MIN -(1 << 5) | |
36 | #define MSGPACK_FIXMAP_MAX_COUNT 15 | |
37 | #define MSGPACK_FIXARRAY_MAX_COUNT 15 | |
38 | #define MSGPACK_FIXSTR_MAX_LENGTH 31 | |
39 | ||
40 | #ifdef __KERNEL__ | |
41 | #include <linux/bug.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/types.h> | |
44 | ||
45 | #include <lttng/msgpack.h> | |
46 | ||
47 | #define INT8_MIN (-128) | |
48 | #define INT16_MIN (-32767-1) | |
49 | #define INT32_MIN (-2147483647-1) | |
50 | #define INT8_MAX (127) | |
51 | #define INT16_MAX (32767) | |
52 | #define INT32_MAX (2147483647) | |
53 | #define UINT8_MAX (255) | |
54 | #define UINT16_MAX (65535) | |
55 | #define UINT32_MAX (4294967295U) | |
56 | ||
57 | #define byteswap_host_to_be16(_tmp) cpu_to_be16(_tmp) | |
58 | #define byteswap_host_to_be32(_tmp) cpu_to_be32(_tmp) | |
59 | #define byteswap_host_to_be64(_tmp) cpu_to_be64(_tmp) | |
60 | ||
61 | #define lttng_msgpack_assert(cond) WARN_ON(!(cond)) | |
62 | ||
63 | #else /* __KERNEL__ */ | |
64 | ||
f03092d7 | 65 | #include <lttng/ust-endian.h> |
49705576 FD |
66 | #include <stdio.h> |
67 | #include <string.h> | |
68 | ||
69 | #include "msgpack.h" | |
70 | ||
71 | #define byteswap_host_to_be16(_tmp) htobe16(_tmp) | |
72 | #define byteswap_host_to_be32(_tmp) htobe32(_tmp) | |
73 | #define byteswap_host_to_be64(_tmp) htobe64(_tmp) | |
74 | ||
75 | #define lttng_msgpack_assert(cond) ({ \ | |
76 | if (!(cond)) \ | |
77 | fprintf(stderr, "Assertion failed. %s:%d\n", __FILE__, __LINE__); \ | |
78 | }) | |
79 | #endif /* __KERNEL__ */ | |
80 | ||
81 | static inline int lttng_msgpack_append_buffer( | |
82 | struct lttng_msgpack_writer *writer, | |
83 | const uint8_t *buf, | |
84 | size_t length) | |
85 | { | |
86 | int ret = 0; | |
87 | ||
88 | lttng_msgpack_assert(buf); | |
89 | ||
90 | /* Ensure we are not trying to write after the end of the buffer. */ | |
91 | if (writer->write_pos + length > writer->end_write_pos) { | |
92 | ret = -1; | |
93 | goto end; | |
94 | } | |
95 | ||
96 | memcpy(writer->write_pos, buf, length); | |
97 | writer->write_pos += length; | |
98 | end: | |
99 | return ret; | |
100 | } | |
101 | ||
102 | static inline int lttng_msgpack_append_u8( | |
103 | struct lttng_msgpack_writer *writer, uint8_t value) | |
104 | { | |
105 | return lttng_msgpack_append_buffer(writer, &value, sizeof(value)); | |
106 | } | |
107 | ||
108 | static inline int lttng_msgpack_append_u16( | |
109 | struct lttng_msgpack_writer *writer, uint16_t value) | |
110 | { | |
111 | value = byteswap_host_to_be16(value); | |
112 | ||
113 | return lttng_msgpack_append_buffer(writer, (uint8_t *) &value, sizeof(value)); | |
114 | } | |
115 | ||
116 | static inline int lttng_msgpack_append_u32( | |
117 | struct lttng_msgpack_writer *writer, uint32_t value) | |
118 | { | |
119 | value = byteswap_host_to_be32(value); | |
120 | ||
121 | return lttng_msgpack_append_buffer(writer, (uint8_t *) &value, sizeof(value)); | |
122 | } | |
123 | ||
124 | static inline int lttng_msgpack_append_u64( | |
125 | struct lttng_msgpack_writer *writer, uint64_t value) | |
126 | { | |
127 | value = byteswap_host_to_be64(value); | |
128 | ||
129 | return lttng_msgpack_append_buffer(writer, (uint8_t *) &value, sizeof(value)); | |
130 | } | |
131 | ||
132 | static inline int lttng_msgpack_append_f64( | |
133 | struct lttng_msgpack_writer *writer, double value) | |
134 | { | |
135 | ||
136 | union { | |
137 | double d; | |
138 | uint64_t u; | |
139 | } u; | |
140 | ||
141 | u.d = value; | |
142 | ||
143 | return lttng_msgpack_append_u64(writer, u.u); | |
144 | } | |
145 | ||
146 | static inline int lttng_msgpack_append_i8( | |
147 | struct lttng_msgpack_writer *writer, int8_t value) | |
148 | { | |
149 | return lttng_msgpack_append_u8(writer, (uint8_t) value); | |
150 | } | |
151 | ||
152 | static inline int lttng_msgpack_append_i16( | |
153 | struct lttng_msgpack_writer *writer, int16_t value) | |
154 | { | |
155 | return lttng_msgpack_append_u16(writer, (uint16_t) value); | |
156 | } | |
157 | ||
158 | static inline int lttng_msgpack_append_i32( | |
159 | struct lttng_msgpack_writer *writer, int32_t value) | |
160 | { | |
161 | return lttng_msgpack_append_u32(writer, (uint32_t) value); | |
162 | } | |
163 | ||
164 | static inline int lttng_msgpack_append_i64( | |
165 | struct lttng_msgpack_writer *writer, int64_t value) | |
166 | { | |
167 | return lttng_msgpack_append_u64(writer, (uint64_t) value); | |
168 | } | |
169 | ||
170 | static inline int lttng_msgpack_encode_f64( | |
171 | struct lttng_msgpack_writer *writer, double value) | |
172 | { | |
173 | int ret; | |
174 | ||
175 | ret = lttng_msgpack_append_u8(writer, MSGPACK_FLOAT64_ID); | |
176 | if (ret) | |
177 | goto end; | |
178 | ||
179 | ret = lttng_msgpack_append_f64(writer, value); | |
180 | if (ret) | |
181 | goto end; | |
182 | ||
183 | end: | |
184 | return ret; | |
185 | } | |
186 | ||
187 | static inline int lttng_msgpack_encode_fixmap( | |
188 | struct lttng_msgpack_writer *writer, uint8_t count) | |
189 | { | |
190 | int ret = 0; | |
191 | ||
192 | lttng_msgpack_assert(count <= MSGPACK_FIXMAP_MAX_COUNT); | |
193 | ||
194 | ret = lttng_msgpack_append_u8(writer, MSGPACK_FIXMAP_ID_MASK | count); | |
195 | if (ret) | |
196 | goto end; | |
197 | ||
198 | end: | |
199 | return ret; | |
200 | } | |
201 | ||
202 | static inline int lttng_msgpack_encode_map16( | |
203 | struct lttng_msgpack_writer *writer, uint16_t count) | |
204 | { | |
205 | int ret; | |
206 | ||
207 | lttng_msgpack_assert(count > MSGPACK_FIXMAP_MAX_COUNT); | |
208 | ||
209 | ret = lttng_msgpack_append_u8(writer, MSGPACK_MAP16_ID); | |
210 | if (ret) | |
211 | goto end; | |
212 | ||
213 | ret = lttng_msgpack_append_u16(writer, count); | |
214 | if (ret) | |
215 | goto end; | |
216 | ||
217 | end: | |
218 | return ret; | |
219 | } | |
220 | ||
221 | static inline int lttng_msgpack_encode_fixarray( | |
222 | struct lttng_msgpack_writer *writer, uint8_t count) | |
223 | { | |
224 | int ret = 0; | |
225 | ||
226 | lttng_msgpack_assert(count <= MSGPACK_FIXARRAY_MAX_COUNT); | |
227 | ||
228 | ret = lttng_msgpack_append_u8(writer, MSGPACK_FIXARRAY_ID_MASK | count); | |
229 | if (ret) | |
230 | goto end; | |
231 | ||
232 | end: | |
233 | return ret; | |
234 | } | |
235 | ||
236 | static inline int lttng_msgpack_encode_array16( | |
237 | struct lttng_msgpack_writer *writer, uint16_t count) | |
238 | { | |
239 | int ret; | |
240 | ||
241 | lttng_msgpack_assert(count > MSGPACK_FIXARRAY_MAX_COUNT); | |
242 | ||
243 | ret = lttng_msgpack_append_u8(writer, MSGPACK_ARRAY16_ID); | |
244 | if (ret) | |
245 | goto end; | |
246 | ||
247 | ret = lttng_msgpack_append_u16(writer, count); | |
248 | if (ret) | |
249 | goto end; | |
250 | ||
251 | end: | |
252 | return ret; | |
253 | } | |
254 | ||
255 | static inline int lttng_msgpack_encode_fixstr( | |
256 | struct lttng_msgpack_writer *writer, | |
257 | const char *str, | |
258 | uint8_t len) | |
259 | { | |
260 | int ret; | |
261 | ||
262 | lttng_msgpack_assert(len <= MSGPACK_FIXSTR_MAX_LENGTH); | |
263 | ||
264 | ret = lttng_msgpack_append_u8(writer, MSGPACK_FIXSTR_ID_MASK | len); | |
265 | if (ret) | |
266 | goto end; | |
267 | ||
268 | ret = lttng_msgpack_append_buffer(writer, (uint8_t *) str, len); | |
269 | if (ret) | |
270 | goto end; | |
271 | ||
272 | end: | |
273 | return ret; | |
274 | } | |
275 | ||
276 | static inline int lttng_msgpack_encode_str16( | |
277 | struct lttng_msgpack_writer *writer, | |
278 | const char *str, | |
279 | uint16_t len) | |
280 | { | |
281 | int ret; | |
282 | ||
283 | lttng_msgpack_assert(len > MSGPACK_FIXSTR_MAX_LENGTH); | |
284 | ||
285 | ret = lttng_msgpack_append_u8(writer, MSGPACK_STR16_ID); | |
286 | if (ret) | |
287 | goto end; | |
288 | ||
289 | ret = lttng_msgpack_append_u16(writer, len); | |
290 | if (ret) | |
291 | goto end; | |
292 | ||
293 | ret = lttng_msgpack_append_buffer(writer, (uint8_t *) str, len); | |
294 | if (ret) | |
295 | goto end; | |
296 | ||
297 | end: | |
298 | return ret; | |
299 | } | |
300 | ||
301 | int lttng_msgpack_begin_map(struct lttng_msgpack_writer *writer, size_t count) | |
302 | { | |
303 | int ret; | |
304 | ||
8b914423 | 305 | if (count >= (1 << 16)) { |
49705576 FD |
306 | ret = -1; |
307 | goto end; | |
308 | } | |
309 | ||
310 | if (count <= MSGPACK_FIXMAP_MAX_COUNT) | |
311 | ret = lttng_msgpack_encode_fixmap(writer, count); | |
312 | else | |
313 | ret = lttng_msgpack_encode_map16(writer, count); | |
314 | ||
315 | writer->map_nesting++; | |
316 | end: | |
317 | return ret; | |
318 | } | |
319 | ||
320 | int lttng_msgpack_end_map(struct lttng_msgpack_writer *writer) | |
321 | { | |
322 | lttng_msgpack_assert(writer->map_nesting > 0); | |
323 | writer->map_nesting--; | |
324 | return 0; | |
325 | } | |
326 | ||
327 | int lttng_msgpack_begin_array( | |
328 | struct lttng_msgpack_writer *writer, size_t count) | |
329 | { | |
330 | int ret; | |
331 | ||
8b914423 | 332 | if (count >= (1 << 16)) { |
49705576 FD |
333 | ret = -1; |
334 | goto end; | |
335 | } | |
336 | ||
337 | if (count <= MSGPACK_FIXARRAY_MAX_COUNT) | |
338 | ret = lttng_msgpack_encode_fixarray(writer, count); | |
339 | else | |
340 | ret = lttng_msgpack_encode_array16(writer, count); | |
341 | ||
342 | writer->array_nesting++; | |
343 | end: | |
344 | return ret; | |
345 | } | |
346 | ||
347 | int lttng_msgpack_end_array(struct lttng_msgpack_writer *writer) | |
348 | { | |
349 | lttng_msgpack_assert(writer->array_nesting > 0); | |
350 | writer->array_nesting--; | |
351 | return 0; | |
352 | } | |
353 | ||
354 | int lttng_msgpack_write_str(struct lttng_msgpack_writer *writer, | |
355 | const char *str) | |
356 | { | |
357 | int ret; | |
358 | size_t length = strlen(str); | |
8b914423 MD |
359 | |
360 | if (length >= (1 << 16)) { | |
49705576 FD |
361 | ret = -1; |
362 | goto end; | |
363 | } | |
364 | ||
365 | if (length <= MSGPACK_FIXSTR_MAX_LENGTH) | |
366 | ret = lttng_msgpack_encode_fixstr(writer, str, length); | |
367 | else | |
368 | ret = lttng_msgpack_encode_str16(writer, str, length); | |
369 | ||
370 | end: | |
371 | return ret; | |
372 | } | |
373 | ||
374 | int lttng_msgpack_write_nil(struct lttng_msgpack_writer *writer) | |
375 | { | |
376 | return lttng_msgpack_append_u8(writer, MSGPACK_NIL_ID); | |
377 | } | |
378 | ||
379 | int lttng_msgpack_write_true(struct lttng_msgpack_writer *writer) | |
380 | { | |
381 | return lttng_msgpack_append_u8(writer, MSGPACK_TRUE_ID); | |
382 | } | |
383 | ||
384 | int lttng_msgpack_write_false(struct lttng_msgpack_writer *writer) | |
385 | { | |
386 | return lttng_msgpack_append_u8(writer, MSGPACK_FALSE_ID); | |
387 | } | |
388 | ||
389 | int lttng_msgpack_write_unsigned_integer( | |
390 | struct lttng_msgpack_writer *writer, uint64_t value) | |
391 | { | |
392 | int ret = 0; | |
393 | ||
394 | if (value <= MSGPACK_FIXINT_MAX) { | |
395 | ret = lttng_msgpack_append_u8(writer, (uint8_t) value); | |
396 | if (ret) | |
397 | goto end; | |
398 | } else if (value <= UINT8_MAX) { | |
399 | ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT8_ID); | |
400 | if (ret) | |
401 | goto end; | |
402 | ||
403 | ret = lttng_msgpack_append_u8(writer, (uint8_t) value); | |
404 | if (ret) | |
405 | goto end; | |
406 | } else if (value <= UINT16_MAX) { | |
407 | ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT16_ID); | |
408 | if (ret) | |
409 | goto end; | |
410 | ||
411 | ret = lttng_msgpack_append_u16(writer, (uint16_t) value); | |
412 | if (ret) | |
413 | goto end; | |
414 | } else if (value <= UINT32_MAX) { | |
415 | ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT32_ID); | |
416 | if (ret) | |
417 | goto end; | |
418 | ||
419 | ret = lttng_msgpack_append_u32(writer, (uint32_t) value); | |
420 | if (ret) | |
421 | goto end; | |
422 | } else { | |
423 | ret = lttng_msgpack_append_u8(writer, MSGPACK_UINT64_ID); | |
424 | if (ret) | |
425 | goto end; | |
426 | ||
427 | ret = lttng_msgpack_append_u64(writer, value); | |
428 | if (ret) | |
429 | goto end; | |
430 | } | |
431 | ||
432 | end: | |
433 | return ret; | |
434 | } | |
435 | ||
436 | int lttng_msgpack_write_signed_integer(struct lttng_msgpack_writer *writer, int64_t value) | |
437 | { | |
438 | int ret; | |
439 | ||
440 | if (value >= MSGPACK_FIXINT_MIN && value <= MSGPACK_FIXINT_MAX){ | |
441 | ret = lttng_msgpack_append_i8(writer, (int8_t) value); | |
442 | if (ret) | |
443 | goto end; | |
444 | } else if (value >= INT8_MIN && value <= INT8_MAX) { | |
445 | ret = lttng_msgpack_append_u8(writer, MSGPACK_INT8_ID); | |
446 | if (ret) | |
447 | goto end; | |
448 | ||
449 | ret = lttng_msgpack_append_i8(writer, (int8_t) value); | |
450 | if (ret) | |
451 | goto end; | |
452 | } else if (value >= INT16_MIN && value <= INT16_MAX) { | |
453 | ret = lttng_msgpack_append_u8(writer, MSGPACK_INT16_ID); | |
454 | if (ret) | |
455 | goto end; | |
456 | ||
457 | ret = lttng_msgpack_append_i16(writer, (int16_t) value); | |
458 | if (ret) | |
459 | goto end; | |
460 | } else if (value >= INT32_MIN && value <= INT32_MAX) { | |
461 | ret = lttng_msgpack_append_u8(writer, MSGPACK_INT32_ID); | |
462 | if (ret) | |
463 | goto end; | |
464 | ||
465 | ret = lttng_msgpack_append_i32(writer, (int32_t) value); | |
466 | if (ret) | |
467 | goto end; | |
468 | } else { | |
469 | ret = lttng_msgpack_append_u8(writer, MSGPACK_INT64_ID); | |
470 | if (ret) | |
471 | goto end; | |
472 | ||
473 | ret = lttng_msgpack_append_i64(writer, value); | |
474 | if (ret) | |
475 | goto end; | |
476 | } | |
477 | ||
478 | end: | |
479 | return ret; | |
480 | } | |
481 | ||
482 | int lttng_msgpack_write_double(struct lttng_msgpack_writer *writer, double value) | |
483 | { | |
484 | return lttng_msgpack_encode_f64(writer, value); | |
485 | } | |
486 | ||
487 | void lttng_msgpack_writer_init(struct lttng_msgpack_writer *writer, | |
488 | uint8_t *buffer, size_t size) | |
489 | { | |
490 | lttng_msgpack_assert(buffer); | |
491 | lttng_msgpack_assert(size >= 0); | |
492 | ||
493 | writer->buffer = buffer; | |
494 | writer->write_pos = buffer; | |
495 | writer->end_write_pos = buffer + size; | |
496 | ||
497 | writer->array_nesting = 0; | |
498 | writer->map_nesting = 0; | |
499 | } | |
500 | ||
501 | void lttng_msgpack_writer_fini(struct lttng_msgpack_writer *writer) | |
502 | { | |
503 | memset(writer, 0, sizeof(*writer)); | |
504 | } |