51 struct gsm_bts_trx *trx;
79 int old_size,
int new_size);
85#define MSGB_ABORT(msg, fmt, args ...) do { \
86 osmo_panic("msgb(%p): " fmt, msg, ## args); \
89#define MSGB_ABORT(msg, fmt, args ...)
93#define msgb_l1(m) ((void *)(m->l1h))
95#define msgb_l2(m) ((void *)(m->l2h))
97#define msgb_l3(m) ((void *)(m->l3h))
99#define msgb_sms(m) ((void *)(m->l4h))
189 MSGB_ABORT(
msgb,
"Not enough tailroom msgb_put (%u < %u)\n",
203 space[0] = word & 0xFF;
213 osmo_store16be(word, space);
223 osmo_store32be(word, space);
234 MSGB_ABORT(
msgb,
"msgb too small to get %u (len %u)\n",
258 return osmo_load16be(space);
268 return osmo_load32be(space);
286 MSGB_ABORT(
msgb,
"Not enough headroom msgb_push (%u < %u)\n",
309 uint16_t *space = (uint16_t *)
msgb_push(msg, 2);
310 osmo_store16be(word, space);
319 uint32_t *space = (uint32_t *)
msgb_push(msg, 4);
320 osmo_store32be(word, space);
349 msg->
l1h = msg->
l2h = NULL;
370 return osmo_load16be(space);
380 return osmo_load32be(space);
408 MSGB_ABORT(msg,
"Negative length is not allowed\n");
441 osmo_static_assert(size > headroom, headroom_bigger);
455 const unsigned char *lbound;
456 if (!msg || !msg->
data || !msg->
tail ||
465 if (msg->
l1h < lbound)
470 if (msg->
l2h < lbound)
475 if (msg->
l3h < lbound)
480 if (msg->
l4h < lbound)
Osmocom bit level support code.
General definitions that are meant to be included from header files.
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:332
uint16_t msgb_length(const struct msgb *msg)
get length of message buffer
Definition msgb.c:148
static uint8_t msgb_pull_u8(struct msgb *msgb)
remove uint8 from front of message
Definition msgb.h:357
static int msgb_tailroom(const struct msgb *msgb)
determine how much tail room is left in msgb
Definition msgb.h:156
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:157
struct msgb * msgb_alloc(uint16_t size, const char *name)
Allocate a new message buffer.
Definition msgb.c:49
static void msgb_put_u32(struct msgb *msgb, uint32_t word)
append a uint32 value to the end of the message
Definition msgb.h:220
static uint16_t msgb_pull_u16(struct msgb *msgb)
remove uint16 from front of message
Definition msgb.h:367
static uint32_t msgb_get_u32(struct msgb *msgb)
remove uint32 from end of message
Definition msgb.h:265
static int msgb_test_invariant(const struct msgb *msg) __attribute__((pure))
Check a message buffer for consistency.
Definition msgb.h:453
static unsigned int msgb_l3len(const struct msgb *msgb)
determine length of L3 message
Definition msgb.h:132
void msgb_reset(struct msgb *m)
Re-set all message buffer pointers.
Definition msgb.c:119
static void msgb_push_u8(struct msgb *msg, uint8_t word)
prepend a uint8 value to the head of the message
Definition msgb.h:297
#define msgb_l1(m)
obtain L1 header of msgb
Definition msgb.h:93
struct msgb * msgb_copy(const struct msgb *msg, const char *name)
Copy an msgb.
Definition msgb.c:188
static unsigned int msgb_l2len(const struct msgb *msgb)
determine length of L2 message
Definition msgb.h:120
void * msgb_talloc_ctx_init(void *root_ctx, unsigned int pool_size)
Initialize a msgb talloc context for msgb_alloc. Create a talloc context called "msgb"....
Definition msgb.c:170
static void msgb_push_u16(struct msgb *msg, uint16_t word)
prepend a uint16 value to the head of the message
Definition msgb.h:307
static uint32_t msgb_pull_u32(struct msgb *msgb)
remove uint32 from front of message
Definition msgb.h:377
static unsigned int msgb_l1len(const struct msgb *msgb)
determine length of L1 message
Definition msgb.h:108
static unsigned char * msgb_put(struct msgb *msgb, unsigned int len)
append data to end of message buffer
Definition msgb.h:185
static void msgb_put_u16(struct msgb *msgb, uint16_t word)
append a uint16 value to the end of the message
Definition msgb.h:210
const char * msgb_hexdump(const struct msgb *msg)
Return a (static) buffer containing a hexdump of the msg.
Definition msgb.c:275
uint8_t * msgb_data(const struct msgb *msg)
get pointer to data section of message buffer
Definition msgb.c:139
static int msgb_trim(struct msgb *msg, int len)
Trim the msgb to a given absolute length.
Definition msgb.h:405
static uint8_t msgb_get_u8(struct msgb *msgb)
remove uint8 from end of message
Definition msgb.h:245
static struct msgb * msgb_alloc_headroom(int size, int headroom, const char *name)
Allocate message buffer with specified headroom.
Definition msgb.h:438
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:346
static void msgb_push_u32(struct msgb *msg, uint32_t word)
prepend a uint32 value to the head of the message
Definition msgb.h:317
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:230
static void msgb_put_u8(struct msgb *msgb, uint8_t word)
append a uint8 value to the end of the message
Definition msgb.h:200
void msgb_enqueue(struct llist_head *queue, struct msgb *msg)
Enqueue message buffer to tail of a queue.
Definition msgb.c:84
static unsigned char * msgb_get(struct msgb *msgb, unsigned int len)
remove data from end of message
Definition msgb.h:230
static uint16_t msgb_get_u16(struct msgb *msgb)
remove uint16 from end of message
Definition msgb.h:255
static void msgb_reserve(struct msgb *msg, int len)
Increase headroom of empty msgb, reducing the tailroom.
Definition msgb.h:394
#define msgb_l3(m)
obtain L3 header of msgb
Definition msgb.h:97
static int msgb_l3trim(struct msgb *msg, int l3len)
Trim the msgb to a given layer3 length.
Definition msgb.h:423
struct msgb * msgb_dequeue(struct llist_head *queue)
Dequeue message buffer from head of queue.
Definition msgb.c:96
void msgb_free(struct msgb *m)
Release given message buffer.
Definition msgb.c:72
static unsigned int msgb_headlen(const struct msgb *msgb)
determine the length of the header
Definition msgb.h:144
#define msgb_l2(m)
obtain L2 header of msgb
Definition msgb.h:95
static unsigned char * msgb_push(struct msgb *msgb, unsigned int len)
prepend (push) some data to start of message
Definition msgb.h:283
static int msgb_headroom(const struct msgb *msgb)
determine the amount of headroom in msgb
Definition msgb.h:168
#define OSMO_DEPRECATED(text)
Set the deprecated attribute with a message.
Definition defs.h:41
Simple doubly linked list implementation.
(double) linked list header structure
Definition linuxlist.h:47
Osmocom message buffer.
Definition msgb.h:43
unsigned long cb[5]
control buffer
Definition msgb.h:60
unsigned char * l2h
pointer to A-bis layer 2 header: OML, RSL(RLL), NS
Definition msgb.h:56
uint16_t len
length of bytes used in msgb
Definition msgb.h:63
unsigned char * data
start of message in buffer
Definition msgb.h:67
void * dst
reference of origin/destination
Definition msgb.h:50
struct gsm_lchan * lchan
logical channel
Definition msgb.h:53
unsigned char _data[0]
optional immediate data array
Definition msgb.h:68
unsigned char * l3h
pointer to Layer 3 header. For OML: FOM; RSL: 04.08; GPRS: BSSGP
Definition msgb.h:57
unsigned char * tail
end of message in buffer
Definition msgb.h:66
unsigned char * l4h
pointer to layer 4 header
Definition msgb.h:58
uint16_t data_len
length of underlying data array
Definition msgb.h:62
struct llist_head list
linked list header
Definition msgb.h:44
unsigned char * head
start of underlying memory buffer
Definition msgb.h:65
unsigned char * l1h
pointer to Layer1 header (if any)
Definition msgb.h:55