libosmocore  1.10.0.13-ddc5.202410052026
Osmocom core library
msgb.h
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1 #pragma once
2 
3 /* (C) 2008 by Harald Welte <laforge@gnumonks.org>
4  * All Rights Reserved
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  */
17 
18 #include <stdint.h>
19 #include <osmocom/core/linuxlist.h>
20 #include <osmocom/core/utils.h>
21 #include <osmocom/core/bits.h>
22 #include <osmocom/core/defs.h>
23 
28 #define MSGB_DEBUG
29 
31 struct msgb {
32  struct llist_head list;
35  /* Part of which TRX logical channel we were received / transmitted */
36  /* FIXME: move them into the control buffer */
37  union {
38  void *dst;
39  struct gsm_bts_trx *trx;
40  };
41  struct gsm_lchan *lchan;
43  unsigned char *l1h;
44  unsigned char *l2h;
45  unsigned char *l3h;
46  unsigned char *l4h;
48  unsigned long cb[5];
50  uint16_t data_len;
51  uint16_t len;
53  unsigned char *head;
54  unsigned char *tail;
55  unsigned char *data;
56  unsigned char _data[0];
57 };
58 
59 extern struct msgb *msgb_alloc_c(const void *ctx, uint16_t size, const char *name);
60 extern struct msgb *msgb_alloc(uint16_t size, const char *name);
61 extern void msgb_free(struct msgb *m);
62 extern void msgb_enqueue(struct llist_head *queue, struct msgb *msg);
63 extern struct msgb *msgb_dequeue(struct llist_head *queue);
64 extern void msgb_reset(struct msgb *m);
65 uint16_t msgb_length(const struct msgb *msg);
66 extern const char *msgb_hexdump(const struct msgb *msg);
67 char *msgb_hexdump_buf(char *buf, size_t buf_len, const struct msgb *msg);
68 char *msgb_hexdump_c(const void *ctx, const struct msgb *msg);
69 extern int msgb_resize_area(struct msgb *msg, uint8_t *area,
70  int old_size, int new_size);
71 extern struct msgb *msgb_copy(const struct msgb *msg, const char *name);
72 extern struct msgb *msgb_copy_c(const void *ctx, const struct msgb *msg, const char *name);
73 extern struct msgb *msgb_copy_resize(const struct msgb *msg, uint16_t new_len, const char *name);
74 extern struct msgb *msgb_copy_resize_c(const void *ctx, const struct msgb *msg, uint16_t new_len, const char *name);
75 static int msgb_test_invariant(const struct msgb *msg) __attribute__((pure));
76 
80 static inline void msgb_queue_free(struct llist_head *queue)
81 {
82  struct msgb *msg;
83  while ((msg = msgb_dequeue(queue))) msgb_free(msg);
84 }
85 
95 static inline void msgb_enqueue_count(struct llist_head *queue, struct msgb *msg,
96  unsigned int *count)
97 {
98  msgb_enqueue(queue, msg);
99  (*count)++;
100 }
101 
111 static inline struct msgb *msgb_dequeue_count(struct llist_head *queue,
112  unsigned int *count)
113 {
114  struct msgb *msg = msgb_dequeue(queue);
115  if (msg)
116  (*count)--;
117  return msg;
118 }
119 
120 #ifdef MSGB_DEBUG
121 #include <osmocom/core/panic.h>
122 #define MSGB_ABORT(msg, fmt, args ...) do { \
123  osmo_panic("msgb(%p): " fmt, msg, ## args); \
124  } while(0)
125 #else
126 #define MSGB_ABORT(msg, fmt, args ...)
127 #endif
128 
130 #define msgb_l1(m) ((void *)((m)->l1h))
132 #define msgb_l2(m) ((void *)((m)->l2h))
134 #define msgb_l3(m) ((void *)((m)->l3h))
136 #define msgb_l4(m) ((void *)((m)->l4h))
138 #define msgb_sms(m) msgb_l4(m)
139 
147 static inline unsigned int msgb_l1len(const struct msgb *msgb)
148 {
149  OSMO_ASSERT(msgb->l1h);
150  return msgb->tail - (uint8_t *)msgb_l1(msgb);
151 }
152 
160 static inline unsigned int msgb_l2len(const struct msgb *msgb)
161 {
162  OSMO_ASSERT(msgb->l2h);
163  return msgb->tail - (uint8_t *)msgb_l2(msgb);
164 }
165 
173 static inline unsigned int msgb_l3len(const struct msgb *msgb)
174 {
175  OSMO_ASSERT(msgb->l3h);
176  return msgb->tail - (uint8_t *)msgb_l3(msgb);
177 }
178 
186 static inline unsigned int msgb_l4len(const struct msgb *msgb)
187 {
188  OSMO_ASSERT(msgb->l4h);
189  return msgb->tail - (uint8_t *)msgb_l4(msgb);
190 }
191 
199 static inline unsigned int msgb_headlen(const struct msgb *msgb)
200 {
201  return msgb->len - msgb->data_len;
202 }
203 
211 static inline int msgb_tailroom(const struct msgb *msgb)
212 {
213  return (msgb->head + msgb->data_len) - msgb->tail;
214 }
215 
223 static inline int msgb_headroom(const struct msgb *msgb)
224 {
225  return (msgb->data - msgb->head);
226 }
227 
240 static inline unsigned char *msgb_put(struct msgb *msgb, unsigned int len)
241 {
242  unsigned char *tmp = msgb->tail;
243  if (OSMO_UNLIKELY(msgb_tailroom(msgb) < (int) len))
244  MSGB_ABORT(msgb, "Not enough tailroom msgb_put"
245  " (allocated %u, head at %u, len %u, tailroom %u < want tailroom %u)\n",
246  msgb->data_len - sizeof(struct msgb),
247  msgb->head - msgb->_data,
248  msgb->len,
250  msgb->tail += len;
251  msgb->len += len;
252  return tmp;
253 }
254 
259 static inline void msgb_put_u8(struct msgb *msgb, uint8_t word)
260 {
261  uint8_t *space = msgb_put(msgb, 1);
262  space[0] = word & 0xFF;
263 }
264 
269 static inline void msgb_put_u16(struct msgb *msgb, uint16_t word)
270 {
271  uint8_t *space = msgb_put(msgb, 2);
272  osmo_store16be(word, space);
273 }
274 
279 static inline void msgb_put_u32(struct msgb *msgb, uint32_t word)
280 {
281  uint8_t *space = msgb_put(msgb, 4);
282  osmo_store32be(word, space);
283 }
284 
289 static inline unsigned char *msgb_get(struct msgb *msgb, unsigned int len)
290 {
292  MSGB_ABORT(msgb, "msgb too small to get %u (len %u)\n",
293  len, msgb_length(msgb));
294  msgb->tail -= len;
295  msgb->len -= len;
296  return msgb->tail;
297 }
298 
303 static inline uint8_t msgb_get_u8(struct msgb *msgb)
304 {
305  uint8_t *space = msgb_get(msgb, 1);
306  return space[0];
307 }
308 
313 static inline uint16_t msgb_get_u16(struct msgb *msgb)
314 {
315  uint8_t *space = msgb_get(msgb, 2);
316  return osmo_load16be(space);
317 }
318 
323 static inline uint32_t msgb_get_u32(struct msgb *msgb)
324 {
325  uint8_t *space = msgb_get(msgb, 4);
326  return osmo_load32be(space);
327 }
328 
341 static inline unsigned char *msgb_push(struct msgb *msgb, unsigned int len)
342 {
343  if (OSMO_UNLIKELY(msgb_headroom(msgb) < (int) len))
344  MSGB_ABORT(msgb, "Not enough headroom msgb_push"
345  " (allocated %u, head at %u < want headroom %u, len %u, tailroom %u)\n",
346  msgb->data_len - sizeof(struct msgb),
347  msgb->head - msgb->_data,
348  len,
349  msgb->len,
351  msgb->data -= len;
352  msgb->len += len;
353  return msgb->data;
354 }
355 
360 static inline void msgb_push_u8(struct msgb *msg, uint8_t word)
361 {
362  uint8_t *space = msgb_push(msg, 1);
363  space[0] = word;
364 }
365 
370 static inline void msgb_push_u16(struct msgb *msg, uint16_t word)
371 {
372  uint16_t *space = (uint16_t *) msgb_push(msg, 2);
373  osmo_store16be(word, space);
374 }
375 
380 static inline void msgb_push_u32(struct msgb *msg, uint32_t word)
381 {
382  uint32_t *space = (uint32_t *) msgb_push(msg, 4);
383  osmo_store32be(word, space);
384 }
385 
386 static inline unsigned char *msgb_push_tl(struct msgb *msgb, uint8_t tag)
387 {
388  uint8_t *data = msgb_push(msgb, 2);
389 
390  data[0] = tag;
391  data[1] = msgb->len - 2;
392  return data;
393 }
394 
404 static inline unsigned char *msgb_pull(struct msgb *msgb, unsigned int len)
405 {
407  MSGB_ABORT(msgb, "msgb too small to pull %u (len %u)\n",
408  len, msgb_length(msgb));
409  msgb->len -= len;
410  return msgb->data += len;
411 }
412 
421 static inline unsigned char *msgb_pull_to_l3(struct msgb *msg)
422 {
423  unsigned char *ret = msgb_pull(msg, msg->l3h - msg->data);
424  msg->l1h = msg->l2h = NULL;
425  return ret;
426 }
427 
436 static inline unsigned char *msgb_pull_to_l2(struct msgb *msg)
437 {
438  unsigned char *ret = msgb_pull(msg, msg->l2h - msg->data);
439  msg->l1h = NULL;
440  return ret;
441 }
442 
447 static inline uint8_t msgb_pull_u8(struct msgb *msgb)
448 {
449  uint8_t *space = msgb_pull(msgb, 1) - 1;
450  return space[0];
451 }
452 
457 static inline uint16_t msgb_pull_u16(struct msgb *msgb)
458 {
459  uint8_t *space = msgb_pull(msgb, 2) - 2;
460  return osmo_load16be(space);
461 }
462 
467 static inline uint32_t msgb_pull_u32(struct msgb *msgb)
468 {
469  uint8_t *space = msgb_pull(msgb, 4) - 4;
470  return osmo_load32be(space);
471 }
472 
484 static inline void msgb_reserve(struct msgb *msg, int len)
485 {
486  msg->data += len;
487  msg->tail += len;
488 }
489 
495 static inline int msgb_trim(struct msgb *msg, int len)
496 {
497  if (OSMO_UNLIKELY(len < 0))
498  MSGB_ABORT(msg, "Negative length is not allowed\n");
499  if (OSMO_UNLIKELY(len > msg->data_len))
500  return -1;
501 
502  msg->len = len;
503  msg->tail = msg->data + len;
504 
505  return 0;
506 }
507 
513 static inline int msgb_l3trim(struct msgb *msg, int l3len)
514 {
515  return msgb_trim(msg, (msg->l3h - msg->data) + l3len);
516 }
517 
529 static inline struct msgb *msgb_alloc_headroom_c(const void *ctx, uint16_t size, uint16_t headroom,
530  const char *name)
531 {
532  OSMO_ASSERT(size >= headroom);
533 
534  struct msgb *msg = msgb_alloc_c(ctx, size, name);
535  if (OSMO_LIKELY(msg))
536  msgb_reserve(msg, headroom);
537  return msg;
538 }
539 
540 
551 static inline struct msgb *msgb_alloc_headroom(uint16_t size, uint16_t headroom,
552  const char *name)
553 {
554  OSMO_ASSERT(size >= headroom);
555 
556  struct msgb *msg = msgb_alloc(size, name);
557  if (OSMO_LIKELY(msg))
558  msgb_reserve(msg, headroom);
559  return msg;
560 }
561 
566 static inline int msgb_test_invariant(const struct msgb *msg)
567 {
568  const unsigned char *lbound;
569  if (!msg || !msg->data || !msg->tail ||
570  (msg->data + msg->len != msg->tail) ||
571  (msg->data < msg->head) ||
572  (msg->tail > msg->head + msg->data_len))
573  return 0;
574 
575  lbound = msg->head;
576 
577  if (msg->l1h) {
578  if (msg->l1h < lbound)
579  return 0;
580  lbound = msg->l1h;
581  }
582  if (msg->l2h) {
583  if (msg->l2h < lbound)
584  return 0;
585  lbound = msg->l2h;
586  }
587  if (msg->l3h) {
588  if (msg->l3h < lbound)
589  return 0;
590  lbound = msg->l3h;
591  }
592  if (msg->l4h) {
593  if (msg->l4h < lbound)
594  return 0;
595  lbound = msg->l4h;
596  }
597 
598  return lbound <= msg->head + msg->data_len;
599 }
600 
601 
602 /* msgb data comparison helpers */
603 
610 #define msgb_eq_data(msg, data, len) \
611  _msgb_eq(__FILE__, __LINE__, __func__, 0, msg, data, len, false)
612 
619 #define msgb_eq_l1_data(msg, data, len) \
620  _msgb_eq(__FILE__, __LINE__, __func__, 1, msg, data, len, false)
621 
628 #define msgb_eq_l2_data(msg, data, len) \
629  _msgb_eq(__FILE__, __LINE__, __func__, 2, msg, data, len, false)
630 
637 #define msgb_eq_l3_data(msg, data, len) \
638  _msgb_eq(__FILE__, __LINE__, __func__, 3, msg, data, len, false)
639 
646 #define msgb_eq_l4_data(msg, data, len) \
647  _msgb_eq(__FILE__, __LINE__, __func__, 4, msg, data, len, false)
648 
649 
650 /* msgb test/debug helpers */
651 
658 #define msgb_eq_data_print(msg, data, len) \
659  _msgb_eq(__FILE__, __LINE__, __func__, 0, msg, data, len, true)
660 
667 #define msgb_eq_l1_data_print(msg, data, len) \
668  _msgb_eq(__FILE__, __LINE__, __func__, 1, msg, data, len, true)
669 
676 #define msgb_eq_l2_data_print(msg, data, len) \
677  _msgb_eq(__FILE__, __LINE__, __func__, 2, msg, data, len, true)
678 
685 #define msgb_eq_l3_data_print(msg, data, len) \
686  _msgb_eq(__FILE__, __LINE__, __func__, 3, msg, data, len, true)
687 
688 
695 #define msgb_eq_l4_data_print(msg, data, len) \
696  _msgb_eq(__FILE__, __LINE__, __func__, 4, msg, data, len, true)
697 
698 bool _msgb_eq(const char *file, size_t line, const char *func, uint8_t level,
699  const struct msgb *msg, const uint8_t *data, size_t len, bool print);
700 
701 
702 /* msgb data comparison */
703 
709 #define msgb_eq(msg1, msg2) msgb_eq_data(msg1, msgb_data(msg2), msgb_length(msg2))
710 
716 #define msgb_eq_l1(msg1, msg2) msgb_eq_l1_data(msg1, msgb_l1(msg2), msgb_l1len(msg2))
717 
723 #define msgb_eq_l2(msg1, msg2) msgb_eq_l2_data(msg1, msgb_l2(msg2), msgb_l2len(msg2))
724 
730 #define msgb_eq_l3(msg1, msg2) msgb_eq_l3_data(msg1, msgb_l3(msg2), msgb_l3len(msg2))
731 
737 #define msgb_eq_l4(msg1, msg2) msgb_eq_l4_data(msg1, msgb_l4(msg2), msgb_l4len(msg2))
738 
739 
740 /* non inline functions to ease binding */
741 
742 uint8_t *msgb_data(const struct msgb *msg);
743 
744 void *msgb_talloc_ctx_init(void *root_ctx, unsigned int pool_size);
745 void msgb_set_talloc_ctx(void *ctx) OSMO_DEPRECATED("Use msgb_talloc_ctx_init() instead");
746 int msgb_printf(struct msgb *msgb, const char *format, ...);
747 
748 static inline const char *msgb_hexdump_l1(const struct msgb *msg)
749 {
750  if (!msgb_l1(msg) || !(msgb_l1len(msg)))
751  return "[]";
752  return osmo_hexdump((const unsigned char *) msgb_l1(msg), msgb_l1len(msg));
753 }
754 
755 static inline const char *msgb_hexdump_l2(const struct msgb *msg)
756 {
757  if (!msgb_l2(msg) || !(msgb_l2len(msg)))
758  return "[]";
759  return osmo_hexdump((const unsigned char *) msgb_l2(msg), msgb_l2len(msg));
760 }
761 
762 static inline const char *msgb_hexdump_l3(const struct msgb *msg)
763 {
764  if (!msgb_l3(msg) || !(msgb_l3len(msg)))
765  return "[]";
766  return osmo_hexdump((const unsigned char*) msgb_l3(msg), msgb_l3len(msg));
767 }
768 
769 static inline const char *msgb_hexdump_l4(const struct msgb *msg)
770 {
771  if (!msgb_l4(msg) || !(msgb_l4len(msg)))
772  return "[]";
773  return osmo_hexdump((const unsigned char*) msgb_l4(msg), msgb_l4len(msg));
774 }
775 
static void osmo_store16be(uint16_t x, void *p)
store unaligned 16-bit integer (big-endian encoding)
Definition: bit16gen.h:121
static uint16_t osmo_load16be(const void *p)
load unaligned 16-bit integer (big-endian encoding)
Definition: bit16gen.h:108
static void osmo_store32be(uint32_t x, void *p)
store unaligned 32-bit integer (big-endian encoding)
Definition: bit32gen.h:121
static uint32_t osmo_load32be(const void *p)
load unaligned 32-bit integer (big-endian encoding)
Definition: bit32gen.h:108
Osmocom bit level support code.
General definitions that are meant to be included from header files.
const char * name
write Write running configuration to or terminal n Write configuration to the file(same as write file)\n") ALIAS(config_write_file
static size_t len(const char *str)
enum gsm0808_assignment_requirement __attribute__
Definition: log2.h:61
uint8_t data[0]
static const char * msgb_hexdump_l3(const struct msgb *msg)
Definition: msgb.h:762
uint16_t msgb_length(const struct msgb *msg)
get length of message buffer
Definition: msgb.c:285
static uint8_t msgb_pull_u8(struct msgb *msgb)
remove uint8 from front of message
Definition: msgb.h:447
static int msgb_tailroom(const struct msgb *msgb)
determine how much tail room is left in msgb
Definition: msgb.h:211
static const char * msgb_hexdump_l2(const struct msgb *msg)
Definition: msgb.h:755
void msgb_set_talloc_ctx(void *ctx) OSMO_DEPRECATED("Use msgb_talloc_ctx_init() instead")
Set the talloc context for msgb_alloc Deprecated, use msgb_talloc_ctx_init() instead.
Definition: msgb.c:294
static unsigned int msgb_l4len(const struct msgb *msgb)
determine length of L4 message
Definition: msgb.h:186
struct msgb * msgb_alloc(uint16_t size, const char *name)
Allocate a new message buffer from tall_msgb_ctx.
Definition: msgb.c:108
static void msgb_put_u32(struct msgb *msgb, uint32_t word)
append a uint32 value to the end of the message
Definition: msgb.h:279
static uint16_t msgb_pull_u16(struct msgb *msgb)
remove uint16 from front of message
Definition: msgb.h:457
static unsigned char * msgb_push_tl(struct msgb *msgb, uint8_t tag)
Definition: msgb.h:386
static unsigned char * msgb_pull(struct msgb *msgb, unsigned int len)
remove (pull) a header from the front of the message buffer
Definition: msgb.h:404
static const char * msgb_hexdump_l4(const struct msgb *msg)
Definition: msgb.h:769
static uint32_t msgb_get_u32(struct msgb *msgb)
remove uint32 from end of message
Definition: msgb.h:323
struct msgb * msgb_copy_c(const void *ctx, const struct msgb *msg, const char *name)
Copy an msgb.
Definition: msgb.c:383
static unsigned char * msgb_pull_to_l2(struct msgb *msg)
remove (pull) all headers in front of l2h from the message buffer.
Definition: msgb.h:436
static int msgb_test_invariant(const struct msgb *msg) __attribute__((pure))
Check a message buffer for consistency.
Definition: msgb.h:566
static unsigned int msgb_l3len(const struct msgb *msgb)
determine length of L3 message
Definition: msgb.h:173
char * msgb_hexdump_c(const void *ctx, const struct msgb *msg)
Return a dynamically allocated buffer containing a hexdump of the msg.
Definition: msgb.c:553
void msgb_reset(struct msgb *m)
Re-set all message buffer pointers.
Definition: msgb.c:164
static unsigned char * msgb_push(struct msgb *msgb, unsigned int len)
prepend (push) some data to start of message
Definition: msgb.h:341
static void msgb_push_u8(struct msgb *msg, uint8_t word)
prepend a uint8 value to the head of the message
Definition: msgb.h:360
#define msgb_l1(m)
obtain L1 header of msgb
Definition: msgb.h:130
struct msgb * msgb_copy(const struct msgb *msg, const char *name)
Copy an msgb.
Definition: msgb.c:396
static struct msgb * msgb_dequeue_count(struct llist_head *queue, unsigned int *count)
Dequeue message buffer from head of queue and decrement queue size counter.
Definition: msgb.h:111
static unsigned int msgb_l2len(const struct msgb *msgb)
determine length of L2 message
Definition: msgb.h:160
void * msgb_talloc_ctx_init(void *root_ctx, unsigned int pool_size)
Initialize a msgb talloc context for msgb_alloc.
Definition: msgb.c:307
static void msgb_push_u16(struct msgb *msg, uint16_t word)
prepend a uint16 value to the head of the message
Definition: msgb.h:370
static uint32_t msgb_pull_u32(struct msgb *msgb)
remove uint32 from front of message
Definition: msgb.h:467
static unsigned int msgb_l1len(const struct msgb *msgb)
determine length of L1 message
Definition: msgb.h:147
bool _msgb_eq(const char *file, size_t line, const char *func, uint8_t level, const struct msgb *msg, const uint8_t *data, size_t len, bool print)
Compare and print: check data in msgb against given data and print errors if any.
Definition: msgb.c:202
static struct msgb * msgb_alloc_headroom(uint16_t size, uint16_t headroom, const char *name)
Allocate message buffer with specified headroom.
Definition: msgb.h:551
#define msgb_l4(m)
obtain L4 header of msgb
Definition: msgb.h:136
static unsigned char * msgb_pull_to_l3(struct msgb *msg)
remove (pull) all headers in front of l3h from the message buffer.
Definition: msgb.h:421
int msgb_printf(struct msgb *msgb, const char *format,...)
Print a string to the end of message buffer.
Definition: msgb.c:579
static void msgb_put_u16(struct msgb *msgb, uint16_t word)
append a uint16 value to the end of the message
Definition: msgb.h:269
static struct msgb * msgb_alloc_headroom_c(const void *ctx, uint16_t size, uint16_t headroom, const char *name)
Allocate message buffer with specified headroom from specified talloc context.
Definition: msgb.h:529
char * msgb_hexdump_buf(char *buf, size_t buf_len, const struct msgb *msg)
fill user-provided buffer with hexdump of the msg.
Definition: msgb.c:461
const char * msgb_hexdump(const struct msgb *msg)
Return a (static) buffer containing a hexdump of the msg.
Definition: msgb.c:542
uint8_t * msgb_data(const struct msgb *msg)
get pointer to data section of message buffer
Definition: msgb.c:184
static void msgb_queue_free(struct llist_head *queue)
Free all msgbs from a queue built with msgb_enqueue().
Definition: msgb.h:80
static int msgb_trim(struct msgb *msg, int len)
Trim the msgb to a given absolute length.
Definition: msgb.h:495
static uint8_t msgb_get_u8(struct msgb *msgb)
remove uint8 from end of message
Definition: msgb.h:303
static void msgb_push_u32(struct msgb *msg, uint32_t word)
prepend a uint32 value to the head of the message
Definition: msgb.h:380
int msgb_resize_area(struct msgb *msg, uint8_t *area, int old_size, int new_size)
Resize an area within an msgb.
Definition: msgb.c:414
struct msgb * msgb_copy_resize_c(const void *ctx, const struct msgb *msg, uint16_t new_len, const char *name)
Copy an msgb with memory reallocation.
Definition: msgb.c:326
static unsigned char * msgb_put(struct msgb *msgb, unsigned int len)
append data to end of message buffer
Definition: msgb.h:240
static void msgb_put_u8(struct msgb *msgb, uint8_t word)
append a uint8 value to the end of the message
Definition: msgb.h:259
struct msgb * msgb_alloc_c(const void *ctx, uint16_t size, const char *name)
Allocate a new message buffer from given talloc context.
Definition: msgb.c:73
void msgb_enqueue(struct llist_head *queue, struct msgb *msg)
Enqueue message buffer to tail of a queue.
Definition: msgb.c:129
static uint16_t msgb_get_u16(struct msgb *msgb)
remove uint16 from end of message
Definition: msgb.h:313
static void msgb_enqueue_count(struct llist_head *queue, struct msgb *msg, unsigned int *count)
Enqueue message buffer to tail of a queue and increment queue size counter.
Definition: msgb.h:95
static void msgb_reserve(struct msgb *msg, int len)
Increase headroom of empty msgb, reducing the tailroom.
Definition: msgb.h:484
#define msgb_l3(m)
obtain L3 header of msgb
Definition: msgb.h:134
static int msgb_l3trim(struct msgb *msg, int l3len)
Trim the msgb to a given layer3 length.
Definition: msgb.h:513
struct msgb * msgb_dequeue(struct llist_head *queue)
Dequeue message buffer from head of queue.
Definition: msgb.c:141
void msgb_free(struct msgb *m)
Release given message buffer.
Definition: msgb.c:117
struct msgb * msgb_copy_resize(const struct msgb *msg, uint16_t new_len, const char *name)
Copy an msgb with memory reallocation.
Definition: msgb.c:369
static unsigned int msgb_headlen(const struct msgb *msgb)
determine the length of the header
Definition: msgb.h:199
static const char * msgb_hexdump_l1(const struct msgb *msg)
Definition: msgb.h:748
#define msgb_l2(m)
obtain L2 header of msgb
Definition: msgb.h:132
#define MSGB_ABORT(msg, fmt, args ...)
Definition: msgb.h:122
static unsigned char * msgb_get(struct msgb *msgb, unsigned int len)
remove data from end of message
Definition: msgb.h:289
static int msgb_headroom(const struct msgb *msgb)
determine the amount of headroom in msgb
Definition: msgb.h:223
#define OSMO_UNLIKELY(exp)
Definition: utils.h:47
#define OSMO_ASSERT(exp)
Helper macro to terminate when an assertion fails.
Definition: utils.h:113
#define OSMO_LIKELY(exp)
Branch prediction optimizations.
Definition: utils.h:46
#define OSMO_DEPRECATED(text)
Set the deprecated attribute with a message.
Definition: defs.h:41
char * osmo_hexdump(const unsigned char *buf, int len)
Convert binary sequence to hexadecimal ASCII string.
Definition: utils.c:394
uint8_t msg[0]
uint8_t level
logging level
Definition: gsmtap.h:6
Simple doubly linked list implementation.
(double) linked list header structure
Definition: linuxlist.h:46
Osmocom message buffer.
Definition: msgb.h:31
unsigned long cb[5]
control buffer
Definition: msgb.h:48
unsigned char * l2h
pointer to A-bis layer 2 header: OML, RSL(RLL), NS
Definition: msgb.h:44
uint16_t len
length of bytes used in msgb
Definition: msgb.h:51
unsigned char * data
start of message in buffer
Definition: msgb.h:55
void * dst
reference of origin/destination
Definition: msgb.h:38
struct gsm_lchan * lchan
logical channel
Definition: msgb.h:41
unsigned char _data[0]
optional immediate data array
Definition: msgb.h:56
unsigned char * l3h
pointer to Layer 3 header.
Definition: msgb.h:45
unsigned char * tail
end of message in buffer
Definition: msgb.h:54
struct gsm_bts_trx * trx
Definition: msgb.h:39
unsigned char * l4h
pointer to layer 4 header
Definition: msgb.h:46
uint16_t data_len
length of underlying data array
Definition: msgb.h:50
struct llist_head list
linked list header
Definition: msgb.h:32
unsigned char * head
start of underlying memory buffer
Definition: msgb.h:53
unsigned char * l1h
pointer to Layer1 header (if any)
Definition: msgb.h:43