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064af421 | 1 | /* |
125638eb | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
064af421 | 3 | * |
a14bc59f BP |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
064af421 | 7 | * |
a14bc59f BP |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
064af421 BP |
15 | */ |
16 | ||
17 | #include <config.h> | |
18 | #include "ofpbuf.h" | |
064af421 BP |
19 | #include <stdlib.h> |
20 | #include <string.h> | |
0ab8e15f | 21 | #include "dynamic-string.h" |
8a9562d2 | 22 | #include "netdev-dpdk.h" |
064af421 BP |
23 | #include "util.h" |
24 | ||
d8a59e89 PS |
25 | static void |
26 | ofpbuf_init__(struct ofpbuf *b, size_t allocated, enum ofpbuf_source source) | |
27 | { | |
28 | b->allocated = allocated; | |
29 | b->source = source; | |
6fd6ed71 PS |
30 | b->header = NULL; |
31 | b->msg = NULL; | |
d8a59e89 PS |
32 | list_poison(&b->list_node); |
33 | } | |
34 | ||
31ac1e59 BP |
35 | static void |
36 | ofpbuf_use__(struct ofpbuf *b, void *base, size_t allocated, | |
37 | enum ofpbuf_source source) | |
064af421 | 38 | { |
6fd6ed71 PS |
39 | b->base = base; |
40 | b->data = base; | |
41 | b->size = 0; | |
1f317cb5 | 42 | |
d8a59e89 | 43 | ofpbuf_init__(b, allocated, source); |
064af421 BP |
44 | } |
45 | ||
31ac1e59 BP |
46 | /* Initializes 'b' as an empty ofpbuf that contains the 'allocated' bytes of |
47 | * memory starting at 'base'. 'base' should be the first byte of a region | |
48 | * obtained from malloc(). It will be freed (with free()) if 'b' is resized or | |
49 | * freed. */ | |
50 | void | |
51 | ofpbuf_use(struct ofpbuf *b, void *base, size_t allocated) | |
52 | { | |
53 | ofpbuf_use__(b, base, allocated, OFPBUF_MALLOC); | |
54 | } | |
55 | ||
56 | /* Initializes 'b' as an empty ofpbuf that contains the 'allocated' bytes of | |
57 | * memory starting at 'base'. 'base' should point to a buffer on the stack. | |
cca408da BP |
58 | * (Nothing actually relies on 'base' being allocated on the stack. It could |
59 | * be static or malloc()'d memory. But stack space is the most common use | |
60 | * case.) | |
31ac1e59 BP |
61 | * |
62 | * 'base' should be appropriately aligned. Using an array of uint32_t or | |
63 | * uint64_t for the buffer is a reasonable way to ensure appropriate alignment | |
125638eb | 64 | * for 32- or 64-bit data. |
31ac1e59 | 65 | * |
cca408da BP |
66 | * An ofpbuf operation that requires reallocating data will assert-fail if this |
67 | * function was used to initialize it. Thus, one need not call ofpbuf_uninit() | |
68 | * on an ofpbuf initialized by this function (though doing so is harmless), | |
69 | * because it is guaranteed that 'b' does not own any heap-allocated memory. */ | |
31ac1e59 BP |
70 | void |
71 | ofpbuf_use_stack(struct ofpbuf *b, void *base, size_t allocated) | |
72 | { | |
73 | ofpbuf_use__(b, base, allocated, OFPBUF_STACK); | |
74 | } | |
75 | ||
cca408da BP |
76 | /* Initializes 'b' as an empty ofpbuf that contains the 'allocated' bytes of |
77 | * memory starting at 'base'. 'base' should point to a buffer on the stack. | |
78 | * (Nothing actually relies on 'base' being allocated on the stack. It could | |
be9fa766 | 79 | * be static or malloc()'d memory. But stack space is the most common use |
cca408da BP |
80 | * case.) |
81 | * | |
82 | * 'base' should be appropriately aligned. Using an array of uint32_t or | |
83 | * uint64_t for the buffer is a reasonable way to ensure appropriate alignment | |
125638eb | 84 | * for 32- or 64-bit data. |
cca408da BP |
85 | * |
86 | * An ofpbuf operation that requires reallocating data will copy the provided | |
87 | * buffer into a malloc()'d buffer. Thus, it is wise to call ofpbuf_uninit() | |
88 | * on an ofpbuf initialized by this function, so that if it expanded into the | |
89 | * heap, that memory is freed. */ | |
90 | void | |
91 | ofpbuf_use_stub(struct ofpbuf *b, void *base, size_t allocated) | |
92 | { | |
93 | ofpbuf_use__(b, base, allocated, OFPBUF_STUB); | |
94 | } | |
95 | ||
0bc9407d BP |
96 | /* Initializes 'b' as an ofpbuf whose data starts at 'data' and continues for |
97 | * 'size' bytes. This is appropriate for an ofpbuf that will be used to | |
98 | * inspect existing data, without moving it around or reallocating it, and | |
31ac1e59 BP |
99 | * generally without modifying it at all. |
100 | * | |
101 | * An ofpbuf operation that requires reallocating data will assert-fail if this | |
102 | * function was used to initialize it. */ | |
0bc9407d BP |
103 | void |
104 | ofpbuf_use_const(struct ofpbuf *b, const void *data, size_t size) | |
105 | { | |
ebc56baa | 106 | ofpbuf_use__(b, CONST_CAST(void *, data), size, OFPBUF_STACK); |
6fd6ed71 | 107 | b->size = size; |
d8a59e89 PS |
108 | } |
109 | ||
064af421 BP |
110 | /* Initializes 'b' as an empty ofpbuf with an initial capacity of 'size' |
111 | * bytes. */ | |
112 | void | |
113 | ofpbuf_init(struct ofpbuf *b, size_t size) | |
114 | { | |
115 | ofpbuf_use(b, size ? xmalloc(size) : NULL, size); | |
116 | } | |
117 | ||
118 | /* Frees memory that 'b' points to. */ | |
119 | void | |
d295e8e9 | 120 | ofpbuf_uninit(struct ofpbuf *b) |
064af421 | 121 | { |
8a9562d2 PS |
122 | if (b) { |
123 | if (b->source == OFPBUF_MALLOC) { | |
6fd6ed71 | 124 | free(b->base); |
8a9562d2 | 125 | } |
064af421 BP |
126 | } |
127 | } | |
128 | ||
129 | /* Frees memory that 'b' points to and allocates a new ofpbuf */ | |
130 | void | |
131 | ofpbuf_reinit(struct ofpbuf *b, size_t size) | |
132 | { | |
133 | ofpbuf_uninit(b); | |
134 | ofpbuf_init(b, size); | |
135 | } | |
136 | ||
137 | /* Creates and returns a new ofpbuf with an initial capacity of 'size' | |
138 | * bytes. */ | |
139 | struct ofpbuf * | |
140 | ofpbuf_new(size_t size) | |
141 | { | |
142 | struct ofpbuf *b = xmalloc(sizeof *b); | |
143 | ofpbuf_init(b, size); | |
144 | return b; | |
145 | } | |
146 | ||
68efcbec BP |
147 | /* Creates and returns a new ofpbuf with an initial capacity of 'size + |
148 | * headroom' bytes, reserving the first 'headroom' bytes as headroom. */ | |
149 | struct ofpbuf * | |
150 | ofpbuf_new_with_headroom(size_t size, size_t headroom) | |
151 | { | |
152 | struct ofpbuf *b = ofpbuf_new(size + headroom); | |
153 | ofpbuf_reserve(b, headroom); | |
154 | return b; | |
155 | } | |
156 | ||
a46c577a | 157 | /* Creates and returns a new ofpbuf that initially contains a copy of the |
6fd6ed71 | 158 | * 'buffer->size' bytes of data starting at 'buffer->data' with no headroom or |
a46c577a | 159 | * tailroom. */ |
064af421 BP |
160 | struct ofpbuf * |
161 | ofpbuf_clone(const struct ofpbuf *buffer) | |
162 | { | |
6aa728e0 | 163 | return ofpbuf_clone_with_headroom(buffer, 0); |
064af421 BP |
164 | } |
165 | ||
68efcbec BP |
166 | /* Creates and returns a new ofpbuf whose data are copied from 'buffer'. The |
167 | * returned ofpbuf will additionally have 'headroom' bytes of headroom. */ | |
168 | struct ofpbuf * | |
169 | ofpbuf_clone_with_headroom(const struct ofpbuf *buffer, size_t headroom) | |
170 | { | |
6aa728e0 | 171 | struct ofpbuf *new_buffer; |
6aa728e0 | 172 | |
6fd6ed71 PS |
173 | new_buffer = ofpbuf_clone_data_with_headroom(buffer->data, |
174 | buffer->size, | |
6aa728e0 | 175 | headroom); |
6fd6ed71 | 176 | if (buffer->header) { |
cf3b7538 | 177 | uintptr_t data_delta |
6fd6ed71 | 178 | = (char *)new_buffer->data - (char *)buffer->data; |
437d0d22 | 179 | |
6fd6ed71 | 180 | new_buffer->header = (char *) buffer->header + data_delta; |
6aa728e0 | 181 | } |
6fd6ed71 | 182 | new_buffer->msg = buffer->msg; |
6aa728e0 EJ |
183 | |
184 | return new_buffer; | |
68efcbec BP |
185 | } |
186 | ||
a46c577a BP |
187 | /* Creates and returns a new ofpbuf that initially contains a copy of the |
188 | * 'size' bytes of data starting at 'data' with no headroom or tailroom. */ | |
064af421 BP |
189 | struct ofpbuf * |
190 | ofpbuf_clone_data(const void *data, size_t size) | |
191 | { | |
a46c577a BP |
192 | return ofpbuf_clone_data_with_headroom(data, size, 0); |
193 | } | |
194 | ||
195 | /* Creates and returns a new ofpbuf that initially contains 'headroom' bytes of | |
196 | * headroom followed by a copy of the 'size' bytes of data starting at | |
197 | * 'data'. */ | |
198 | struct ofpbuf * | |
199 | ofpbuf_clone_data_with_headroom(const void *data, size_t size, size_t headroom) | |
200 | { | |
201 | struct ofpbuf *b = ofpbuf_new_with_headroom(size, headroom); | |
064af421 BP |
202 | ofpbuf_put(b, data, size); |
203 | return b; | |
204 | } | |
205 | ||
1f5cbaa3 | 206 | static void |
0dce369b BP |
207 | ofpbuf_copy__(struct ofpbuf *b, uint8_t *new_base, |
208 | size_t new_headroom, size_t new_tailroom) | |
064af421 | 209 | { |
6fd6ed71 | 210 | const uint8_t *old_base = b->base; |
0dce369b BP |
211 | size_t old_headroom = ofpbuf_headroom(b); |
212 | size_t old_tailroom = ofpbuf_tailroom(b); | |
213 | size_t copy_headroom = MIN(old_headroom, new_headroom); | |
214 | size_t copy_tailroom = MIN(old_tailroom, new_tailroom); | |
215 | ||
216 | memcpy(&new_base[new_headroom - copy_headroom], | |
217 | &old_base[old_headroom - copy_headroom], | |
6fd6ed71 | 218 | copy_headroom + b->size + copy_tailroom); |
064af421 BP |
219 | } |
220 | ||
0dce369b BP |
221 | /* Reallocates 'b' so that it has exactly 'new_headroom' and 'new_tailroom' |
222 | * bytes of headroom and tailroom, respectively. */ | |
1f5cbaa3 | 223 | static void |
0dce369b | 224 | ofpbuf_resize__(struct ofpbuf *b, size_t new_headroom, size_t new_tailroom) |
1f5cbaa3 | 225 | { |
0dce369b | 226 | void *new_base, *new_data; |
31ac1e59 | 227 | size_t new_allocated; |
31ac1e59 | 228 | |
6fd6ed71 | 229 | new_allocated = new_headroom + b->size + new_tailroom; |
31ac1e59 BP |
230 | |
231 | switch (b->source) { | |
232 | case OFPBUF_MALLOC: | |
0dce369b | 233 | if (new_headroom == ofpbuf_headroom(b)) { |
6fd6ed71 | 234 | new_base = xrealloc(b->base, new_allocated); |
0dce369b BP |
235 | } else { |
236 | new_base = xmalloc(new_allocated); | |
237 | ofpbuf_copy__(b, new_base, new_headroom, new_tailroom); | |
6fd6ed71 | 238 | free(b->base); |
0dce369b | 239 | } |
31ac1e59 BP |
240 | break; |
241 | ||
242 | case OFPBUF_STACK: | |
428b2edd | 243 | OVS_NOT_REACHED(); |
31ac1e59 | 244 | |
cca408da BP |
245 | case OFPBUF_STUB: |
246 | b->source = OFPBUF_MALLOC; | |
247 | new_base = xmalloc(new_allocated); | |
248 | ofpbuf_copy__(b, new_base, new_headroom, new_tailroom); | |
249 | break; | |
250 | ||
31ac1e59 | 251 | default: |
428b2edd | 252 | OVS_NOT_REACHED(); |
31ac1e59 BP |
253 | } |
254 | ||
255 | b->allocated = new_allocated; | |
6fd6ed71 | 256 | b->base = new_base; |
0dce369b BP |
257 | |
258 | new_data = (char *) new_base + new_headroom; | |
6fd6ed71 PS |
259 | if (b->data != new_data) { |
260 | if (b->header) { | |
261 | uintptr_t data_delta = (char *) new_data - (char *) b->data; | |
437d0d22 | 262 | |
6fd6ed71 | 263 | b->header = (char *) b->header + data_delta; |
0dce369b | 264 | } |
6fd6ed71 | 265 | b->data = new_data; |
0dce369b | 266 | } |
1f5cbaa3 BP |
267 | } |
268 | ||
269 | /* Ensures that 'b' has room for at least 'size' bytes at its tail end, | |
270 | * reallocating and copying its data if necessary. Its headroom, if any, is | |
271 | * preserved. */ | |
272 | void | |
d295e8e9 | 273 | ofpbuf_prealloc_tailroom(struct ofpbuf *b, size_t size) |
1f5cbaa3 BP |
274 | { |
275 | if (size > ofpbuf_tailroom(b)) { | |
0dce369b | 276 | ofpbuf_resize__(b, ofpbuf_headroom(b), MAX(size, 64)); |
1f5cbaa3 BP |
277 | } |
278 | } | |
279 | ||
0dce369b BP |
280 | /* Ensures that 'b' has room for at least 'size' bytes at its head, |
281 | * reallocating and copying its data if necessary. Its tailroom, if any, is | |
282 | * preserved. */ | |
064af421 | 283 | void |
d295e8e9 | 284 | ofpbuf_prealloc_headroom(struct ofpbuf *b, size_t size) |
064af421 | 285 | { |
0dce369b BP |
286 | if (size > ofpbuf_headroom(b)) { |
287 | ofpbuf_resize__(b, MAX(size, 64), ofpbuf_tailroom(b)); | |
288 | } | |
064af421 BP |
289 | } |
290 | ||
8b6c2c88 WSH |
291 | /* Trims the size of 'b' to fit its actual content, reducing its headroom and |
292 | * tailroom to 0, if any. | |
31ac1e59 BP |
293 | * |
294 | * Buffers not obtained from malloc() are not resized, since that wouldn't save | |
295 | * any memory. */ | |
064af421 BP |
296 | void |
297 | ofpbuf_trim(struct ofpbuf *b) | |
298 | { | |
0dce369b BP |
299 | if (b->source == OFPBUF_MALLOC |
300 | && (ofpbuf_headroom(b) || ofpbuf_tailroom(b))) { | |
301 | ofpbuf_resize__(b, 0, 0); | |
064af421 BP |
302 | } |
303 | } | |
304 | ||
63f2140a BP |
305 | /* If 'b' is shorter than 'length' bytes, pads its tail out with zeros to that |
306 | * length. */ | |
307 | void | |
308 | ofpbuf_padto(struct ofpbuf *b, size_t length) | |
309 | { | |
6fd6ed71 PS |
310 | if (b->size < length) { |
311 | ofpbuf_put_zeros(b, length - b->size); | |
63f2140a BP |
312 | } |
313 | } | |
314 | ||
b2348f6d BP |
315 | /* Shifts all of the data within the allocated space in 'b' by 'delta' bytes. |
316 | * For example, a 'delta' of 1 would cause each byte of data to move one byte | |
317 | * forward (from address 'p' to 'p+1'), and a 'delta' of -1 would cause each | |
318 | * byte to move one byte backward (from 'p' to 'p-1'). */ | |
319 | void | |
320 | ofpbuf_shift(struct ofpbuf *b, int delta) | |
321 | { | |
322 | ovs_assert(delta > 0 ? delta <= ofpbuf_tailroom(b) | |
323 | : delta < 0 ? -delta <= ofpbuf_headroom(b) | |
324 | : true); | |
325 | ||
326 | if (delta != 0) { | |
6fd6ed71 PS |
327 | char *dst = (char *) b->data + delta; |
328 | memmove(dst, b->data, b->size); | |
329 | b->data = dst; | |
b2348f6d BP |
330 | } |
331 | } | |
332 | ||
064af421 BP |
333 | /* Appends 'size' bytes of data to the tail end of 'b', reallocating and |
334 | * copying its data if necessary. Returns a pointer to the first byte of the | |
335 | * new data, which is left uninitialized. */ | |
336 | void * | |
d295e8e9 | 337 | ofpbuf_put_uninit(struct ofpbuf *b, size_t size) |
064af421 BP |
338 | { |
339 | void *p; | |
340 | ofpbuf_prealloc_tailroom(b, size); | |
341 | p = ofpbuf_tail(b); | |
6fd6ed71 | 342 | b->size += size; |
064af421 BP |
343 | return p; |
344 | } | |
345 | ||
346 | /* Appends 'size' zeroed bytes to the tail end of 'b'. Data in 'b' is | |
347 | * reallocated and copied if necessary. Returns a pointer to the first byte of | |
348 | * the data's location in the ofpbuf. */ | |
349 | void * | |
350 | ofpbuf_put_zeros(struct ofpbuf *b, size_t size) | |
351 | { | |
352 | void *dst = ofpbuf_put_uninit(b, size); | |
353 | memset(dst, 0, size); | |
354 | return dst; | |
355 | } | |
356 | ||
357 | /* Appends the 'size' bytes of data in 'p' to the tail end of 'b'. Data in 'b' | |
358 | * is reallocated and copied if necessary. Returns a pointer to the first | |
359 | * byte of the data's location in the ofpbuf. */ | |
360 | void * | |
d295e8e9 | 361 | ofpbuf_put(struct ofpbuf *b, const void *p, size_t size) |
064af421 BP |
362 | { |
363 | void *dst = ofpbuf_put_uninit(b, size); | |
364 | memcpy(dst, p, size); | |
365 | return dst; | |
366 | } | |
367 | ||
78090f63 BP |
368 | /* Parses as many pairs of hex digits as possible (possibly separated by |
369 | * spaces) from the beginning of 's', appending bytes for their values to 'b'. | |
370 | * Returns the first character of 's' that is not the first of a pair of hex | |
371 | * digits. If 'n' is nonnull, stores the number of bytes added to 'b' in | |
372 | * '*n'. */ | |
373 | char * | |
374 | ofpbuf_put_hex(struct ofpbuf *b, const char *s, size_t *n) | |
375 | { | |
6fd6ed71 | 376 | size_t initial_size = b->size; |
78090f63 BP |
377 | for (;;) { |
378 | uint8_t byte; | |
379 | bool ok; | |
380 | ||
1a8def8e | 381 | s += strspn(s, " \t\r\n"); |
78090f63 BP |
382 | byte = hexits_value(s, 2, &ok); |
383 | if (!ok) { | |
384 | if (n) { | |
6fd6ed71 | 385 | *n = b->size - initial_size; |
78090f63 | 386 | } |
ebc56baa | 387 | return CONST_CAST(char *, s); |
78090f63 BP |
388 | } |
389 | ||
390 | ofpbuf_put(b, &byte, 1); | |
391 | s += 2; | |
392 | } | |
393 | } | |
394 | ||
064af421 BP |
395 | /* Reserves 'size' bytes of headroom so that they can be later allocated with |
396 | * ofpbuf_push_uninit() without reallocating the ofpbuf. */ | |
397 | void | |
d295e8e9 | 398 | ofpbuf_reserve(struct ofpbuf *b, size_t size) |
064af421 | 399 | { |
6fd6ed71 | 400 | ovs_assert(!b->size); |
064af421 | 401 | ofpbuf_prealloc_tailroom(b, size); |
6fd6ed71 | 402 | b->data = (char*)b->data + size; |
da546e07 JR |
403 | } |
404 | ||
0dce369b BP |
405 | /* Prefixes 'size' bytes to the head end of 'b', reallocating and copying its |
406 | * data if necessary. Returns a pointer to the first byte of the data's | |
407 | * location in the ofpbuf. The new data is left uninitialized. */ | |
064af421 | 408 | void * |
d295e8e9 | 409 | ofpbuf_push_uninit(struct ofpbuf *b, size_t size) |
064af421 BP |
410 | { |
411 | ofpbuf_prealloc_headroom(b, size); | |
6fd6ed71 PS |
412 | b->data = (char*)b->data - size; |
413 | b->size += size; | |
414 | return b->data; | |
064af421 BP |
415 | } |
416 | ||
0dce369b BP |
417 | /* Prefixes 'size' zeroed bytes to the head end of 'b', reallocating and |
418 | * copying its data if necessary. Returns a pointer to the first byte of the | |
419 | * data's location in the ofpbuf. */ | |
30f07f1a BP |
420 | void * |
421 | ofpbuf_push_zeros(struct ofpbuf *b, size_t size) | |
422 | { | |
423 | void *dst = ofpbuf_push_uninit(b, size); | |
424 | memset(dst, 0, size); | |
425 | return dst; | |
426 | } | |
427 | ||
0dce369b BP |
428 | /* Copies the 'size' bytes starting at 'p' to the head end of 'b', reallocating |
429 | * and copying its data if necessary. Returns a pointer to the first byte of | |
430 | * the data's location in the ofpbuf. */ | |
064af421 | 431 | void * |
d295e8e9 | 432 | ofpbuf_push(struct ofpbuf *b, const void *p, size_t size) |
064af421 BP |
433 | { |
434 | void *dst = ofpbuf_push_uninit(b, size); | |
435 | memcpy(dst, p, size); | |
436 | return dst; | |
437 | } | |
438 | ||
933369b1 BP |
439 | /* Returns the data in 'b' as a block of malloc()'d memory and frees the buffer |
440 | * within 'b'. (If 'b' itself was dynamically allocated, e.g. with | |
441 | * ofpbuf_new(), then it should still be freed with, e.g., ofpbuf_delete().) */ | |
442 | void * | |
443 | ofpbuf_steal_data(struct ofpbuf *b) | |
444 | { | |
445 | void *p; | |
20ebd771 | 446 | |
6fd6ed71 PS |
447 | if (b->source == OFPBUF_MALLOC && b->data == b->base) { |
448 | p = b->data; | |
933369b1 | 449 | } else { |
6fd6ed71 | 450 | p = xmemdup(b->data, b->size); |
933369b1 | 451 | if (b->source == OFPBUF_MALLOC) { |
6fd6ed71 | 452 | free(b->base); |
933369b1 BP |
453 | } |
454 | } | |
6fd6ed71 PS |
455 | b->base = NULL; |
456 | b->data = NULL; | |
933369b1 BP |
457 | return p; |
458 | } | |
459 | ||
0ab8e15f BP |
460 | /* Returns a string that describes some of 'b''s metadata plus a hex dump of up |
461 | * to 'maxbytes' from the start of the buffer. */ | |
462 | char * | |
463 | ofpbuf_to_string(const struct ofpbuf *b, size_t maxbytes) | |
464 | { | |
465 | struct ds s; | |
466 | ||
467 | ds_init(&s); | |
437d0d22 | 468 | ds_put_format(&s, "size=%"PRIu32", allocated=%"PRIu32", head=%"PRIuSIZE", tail=%"PRIuSIZE"\n", |
6fd6ed71 | 469 | b->size, b->allocated, |
0ab8e15f | 470 | ofpbuf_headroom(b), ofpbuf_tailroom(b)); |
6fd6ed71 | 471 | ds_put_hex_dump(&s, b->data, MIN(b->size, maxbytes), 0, false); |
0ab8e15f BP |
472 | return ds_cstr(&s); |
473 | } | |
b3907fbc BP |
474 | |
475 | /* Removes each of the "struct ofpbuf"s on 'list' from the list and frees | |
476 | * them. */ | |
477 | void | |
ca6ba700 | 478 | ofpbuf_list_delete(struct ovs_list *list) |
b3907fbc | 479 | { |
5f03c983 | 480 | struct ofpbuf *b; |
b3907fbc | 481 | |
5f03c983 | 482 | LIST_FOR_EACH_POP (b, list_node, list) { |
b3907fbc BP |
483 | ofpbuf_delete(b); |
484 | } | |
485 | } |