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3c8252a5 | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
3c8252a5 | 3 | * |
0235b0db | 4 | * Copyright 2016-2017 Philippe Proulx <pproulx@efficios.com> |
3c8252a5 PP |
5 | */ |
6 | ||
4164020e | 7 | #define BT_COMP_LOG_SELF_COMP self_comp |
50f6fce8 | 8 | #define BT_COMP_LOG_SELF_COMP_CLASS self_comp_class |
4164020e SM |
9 | #define BT_LOG_OUTPUT_LEVEL log_level |
10 | #define BT_LOG_TAG "PLUGIN/CTF/META/DECODER-DECODE-PACKET" | |
d9c39b0a | 11 | #include "logging/comp-logging.h" |
3c8252a5 | 12 | |
087cd0f5 | 13 | #include "decoder-packetized-file-stream-to-buf.hpp" |
7c7301d5 | 14 | |
3c8252a5 PP |
15 | #include <stdio.h> |
16 | #include <stdbool.h> | |
17 | #include <stdint.h> | |
18 | #include <stdlib.h> | |
19 | #include <inttypes.h> | |
20 | #include "common/assert.h" | |
6162e6b7 | 21 | #include "common/uuid.h" |
3c8252a5 PP |
22 | #include "compat/memstream.h" |
23 | #include <babeltrace2/babeltrace.h> | |
24 | #include <glib.h> | |
25 | #include <string.h> | |
26 | ||
087cd0f5 SM |
27 | #include "ast.hpp" |
28 | #include "decoder.hpp" | |
29 | #include "scanner.hpp" | |
30 | #include "logging.hpp" | |
3c8252a5 | 31 | |
4164020e | 32 | #define TSDL_MAGIC 0x75d11d57 |
3c8252a5 | 33 | |
4164020e SM |
34 | struct ctf_metadata_decoder |
35 | { | |
36 | struct ctf_visitor_generate_ir *visitor; | |
37 | bt_uuid_t uuid; | |
38 | bool is_uuid_set; | |
39 | int bo; | |
40 | struct ctf_metadata_decoder_config config; | |
3c8252a5 PP |
41 | }; |
42 | ||
4164020e SM |
43 | struct packet_header |
44 | { | |
45 | uint32_t magic; | |
46 | bt_uuid_t uuid; | |
47 | uint32_t checksum; | |
48 | uint32_t content_size; | |
49 | uint32_t packet_size; | |
50 | uint8_t compression_scheme; | |
51 | uint8_t encryption_scheme; | |
52 | uint8_t checksum_scheme; | |
53 | uint8_t major; | |
54 | uint8_t minor; | |
3c8252a5 PP |
55 | } __attribute__((__packed__)); |
56 | ||
4164020e SM |
57 | static int decode_packet(FILE *in_fp, FILE *out_fp, int byte_order, bool *is_uuid_set, |
58 | uint8_t *uuid, bt_logging_level log_level, bt_self_component *self_comp, | |
59 | bt_self_component_class *self_comp_class) | |
3c8252a5 | 60 | { |
4164020e SM |
61 | struct packet_header header; |
62 | size_t readlen, writelen, toread; | |
63 | uint8_t buf[512 + 1]; /* + 1 for debug-mode \0 */ | |
64 | int ret = 0; | |
65 | const long offset = ftell(in_fp); | |
66 | ||
67 | if (offset < 0) { | |
68 | BT_COMP_LOGE_APPEND_CAUSE_ERRNO(BT_COMP_LOG_SELF_COMP, | |
69 | "Failed to get current metadata file position", "."); | |
70 | goto error; | |
71 | } | |
72 | BT_COMP_LOGD("Decoding metadata packet: offset=%ld", offset); | |
73 | readlen = fread(&header, sizeof(header), 1, in_fp); | |
74 | if (feof(in_fp) != 0) { | |
75 | BT_COMP_LOGI("Reached end of file: offset=%ld", ftell(in_fp)); | |
76 | goto end; | |
77 | } | |
78 | if (readlen < 1) { | |
79 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE("Cannot decode metadata packet: offset=%ld", | |
80 | offset); | |
81 | goto error; | |
82 | } | |
83 | ||
84 | if (byte_order != BYTE_ORDER) { | |
85 | header.magic = GUINT32_SWAP_LE_BE(header.magic); | |
86 | header.checksum = GUINT32_SWAP_LE_BE(header.checksum); | |
87 | header.content_size = GUINT32_SWAP_LE_BE(header.content_size); | |
88 | header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size); | |
89 | } | |
90 | ||
91 | if (header.compression_scheme) { | |
92 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
93 | "Metadata packet compression is not supported as of this version: " | |
94 | "compression-scheme=%u, offset=%ld", | |
95 | (unsigned int) header.compression_scheme, offset); | |
96 | goto error; | |
97 | } | |
98 | ||
99 | if (header.encryption_scheme) { | |
100 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
101 | "Metadata packet encryption is not supported as of this version: " | |
102 | "encryption-scheme=%u, offset=%ld", | |
103 | (unsigned int) header.encryption_scheme, offset); | |
104 | goto error; | |
105 | } | |
106 | ||
107 | if (header.checksum || header.checksum_scheme) { | |
108 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
109 | "Metadata packet checksum verification is not supported as of this version: " | |
110 | "checksum-scheme=%u, checksum=%x, offset=%ld", | |
111 | (unsigned int) header.checksum_scheme, header.checksum, offset); | |
112 | goto error; | |
113 | } | |
114 | ||
115 | if (!ctf_metadata_decoder_is_packet_version_valid(header.major, header.minor)) { | |
116 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE("Invalid metadata packet version: " | |
117 | "version=%u.%u, offset=%ld", | |
118 | header.major, header.minor, offset); | |
119 | goto error; | |
120 | } | |
121 | ||
122 | /* Set expected trace UUID if not set; otherwise validate it */ | |
123 | if (is_uuid_set) { | |
124 | if (!*is_uuid_set) { | |
125 | bt_uuid_copy(uuid, header.uuid); | |
126 | *is_uuid_set = true; | |
127 | } else if (bt_uuid_compare(header.uuid, uuid)) { | |
128 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
129 | "Metadata UUID mismatch between packets of the same stream: " | |
130 | "packet-uuid=\"" BT_UUID_FMT "\", " | |
131 | "expected-uuid=\"" BT_UUID_FMT "\", " | |
132 | "offset=%ld", | |
133 | BT_UUID_FMT_VALUES(header.uuid), BT_UUID_FMT_VALUES(uuid), offset); | |
134 | goto error; | |
135 | } | |
136 | } | |
137 | ||
138 | if ((header.content_size / CHAR_BIT) < sizeof(header)) { | |
139 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
140 | "Bad metadata packet content size: content-size=%u, " | |
141 | "offset=%ld", | |
142 | header.content_size, offset); | |
143 | goto error; | |
144 | } | |
145 | ||
146 | toread = header.content_size / CHAR_BIT - sizeof(header); | |
147 | ||
148 | for (;;) { | |
149 | size_t loop_read; | |
150 | ||
151 | loop_read = MIN(sizeof(buf) - 1, toread); | |
152 | readlen = fread(buf, sizeof(uint8_t), loop_read, in_fp); | |
153 | if (ferror(in_fp)) { | |
154 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE("Cannot read metadata packet buffer: " | |
155 | "offset=%ld, read-size=%zu", | |
156 | ftell(in_fp), loop_read); | |
157 | goto error; | |
158 | } | |
159 | if (readlen > loop_read) { | |
160 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE("fread returned more byte than expected: " | |
161 | "read-size-asked=%zu, read-size-returned=%zu", | |
162 | loop_read, readlen); | |
163 | goto error; | |
164 | } | |
165 | ||
166 | writelen = fwrite(buf, sizeof(uint8_t), readlen, out_fp); | |
167 | if (writelen < readlen || ferror(out_fp)) { | |
168 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
169 | "Cannot write decoded metadata text to buffer: " | |
170 | "read-offset=%ld, write-size=%zu", | |
171 | ftell(in_fp), readlen); | |
172 | goto error; | |
173 | } | |
174 | ||
175 | toread -= readlen; | |
176 | if (toread == 0) { | |
177 | int fseek_ret; | |
178 | ||
179 | /* Read leftover padding */ | |
180 | toread = (header.packet_size - header.content_size) / CHAR_BIT; | |
181 | fseek_ret = fseek(in_fp, toread, SEEK_CUR); | |
182 | if (fseek_ret < 0) { | |
183 | BT_COMP_LOGW_STR("Missing padding at the end of the metadata stream."); | |
184 | } | |
185 | break; | |
186 | } | |
187 | } | |
188 | ||
189 | goto end; | |
3c8252a5 PP |
190 | |
191 | error: | |
4164020e | 192 | ret = -1; |
3c8252a5 PP |
193 | |
194 | end: | |
4164020e | 195 | return ret; |
3c8252a5 PP |
196 | } |
197 | ||
198 | BT_HIDDEN | |
4164020e SM |
199 | int ctf_metadata_decoder_packetized_file_stream_to_buf(FILE *fp, char **buf, int byte_order, |
200 | bool *is_uuid_set, uint8_t *uuid, | |
201 | bt_logging_level log_level, | |
202 | bt_self_component *self_comp, | |
203 | bt_self_component_class *self_comp_class) | |
3c8252a5 | 204 | { |
4164020e SM |
205 | FILE *out_fp; |
206 | size_t size; | |
207 | int ret = 0; | |
208 | int tret; | |
209 | size_t packet_index = 0; | |
210 | ||
211 | out_fp = bt_open_memstream(buf, &size); | |
212 | if (!out_fp) { | |
213 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE("Cannot open memory stream: %s.", strerror(errno)); | |
214 | goto error; | |
215 | } | |
216 | ||
217 | for (;;) { | |
218 | if (feof(fp) != 0) { | |
219 | break; | |
220 | } | |
221 | ||
222 | tret = decode_packet(fp, out_fp, byte_order, is_uuid_set, uuid, log_level, self_comp, | |
223 | self_comp_class); | |
224 | if (tret) { | |
225 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE("Cannot decode packet: index=%zu", | |
226 | packet_index); | |
227 | goto error; | |
228 | } | |
229 | ||
230 | packet_index++; | |
231 | } | |
232 | ||
233 | /* Make sure the whole string ends with a null character */ | |
234 | tret = fputc('\0', out_fp); | |
235 | if (tret == EOF) { | |
236 | _BT_COMP_OR_COMP_CLASS_LOGE_APPEND_CAUSE( | |
237 | "Cannot append '\\0' to the decoded metadata buffer."); | |
238 | goto error; | |
239 | } | |
240 | ||
241 | /* Close stream, which also flushes the buffer */ | |
242 | ret = bt_close_memstream(buf, &size, out_fp); | |
243 | /* | |
244 | * See fclose(3). Further access to out_fp after both success | |
245 | * and error, even through another bt_close_memstream(), results | |
246 | * in undefined behavior. Nullify out_fp to ensure we don't | |
247 | * fclose it twice on error. | |
248 | */ | |
249 | out_fp = NULL; | |
250 | if (ret < 0) { | |
251 | BT_COMP_LOGE_APPEND_CAUSE_ERRNO(BT_COMP_LOG_SELF_COMP, "Cannot close memory stream", "."); | |
252 | goto error; | |
253 | } | |
254 | ||
255 | goto end; | |
3c8252a5 PP |
256 | |
257 | error: | |
4164020e | 258 | ret = -1; |
3c8252a5 | 259 | |
4164020e SM |
260 | if (out_fp) { |
261 | if (bt_close_memstream(buf, &size, out_fp)) { | |
262 | BT_COMP_LOGE_ERRNO("Cannot close memory stream", "."); | |
263 | } | |
264 | } | |
3c8252a5 | 265 | |
4164020e SM |
266 | if (*buf) { |
267 | free(*buf); | |
268 | *buf = NULL; | |
269 | } | |
3c8252a5 PP |
270 | |
271 | end: | |
4164020e | 272 | return ret; |
3c8252a5 | 273 | } |