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