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lwIP
2.2.1
Lightweight IP stack
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#include "lwip/opt.h"#include "lwip/pbuf.h"#include "lwip/stats.h"#include "lwip/def.h"#include "lwip/mem.h"#include "lwip/memp.h"#include "lwip/sys.h"#include "lwip/netif.h"#include "lwip/priv/tcp_priv.h"#include <string.h>#include "lwip/tcpip.h"Functions | |
| struct pbuf * | pbuf_alloc (pbuf_layer layer, u16_t length, pbuf_type type) |
| struct pbuf * | pbuf_alloc_reference (void *payload, u16_t length, pbuf_type type) |
| struct pbuf * | pbuf_alloced_custom (pbuf_layer l, u16_t length, pbuf_type type, struct pbuf_custom *p, void *payload_mem, u16_t payload_mem_len) |
| void | pbuf_realloc (struct pbuf *p, u16_t new_len) |
| u8_t | pbuf_add_header (struct pbuf *p, size_t header_size_increment) |
| u8_t | pbuf_add_header_force (struct pbuf *p, size_t header_size_increment) |
| u8_t | pbuf_remove_header (struct pbuf *p, size_t header_size_decrement) |
| u8_t | pbuf_header (struct pbuf *p, s16_t header_size_increment) |
| u8_t | pbuf_header_force (struct pbuf *p, s16_t header_size_increment) |
| struct pbuf * | pbuf_free_header (struct pbuf *q, u16_t size) |
| u8_t | pbuf_free (struct pbuf *p) |
| u16_t | pbuf_clen (const struct pbuf *p) |
| void | pbuf_ref (struct pbuf *p) |
| void | pbuf_cat (struct pbuf *h, struct pbuf *t) |
| void | pbuf_chain (struct pbuf *h, struct pbuf *t) |
| struct pbuf * | pbuf_dechain (struct pbuf *p) |
| err_t | pbuf_copy (struct pbuf *p_to, const struct pbuf *p_from) |
| err_t | pbuf_copy_partial_pbuf (struct pbuf *p_to, const struct pbuf *p_from, u16_t copy_len, u16_t offset) |
| u16_t | pbuf_copy_partial (const struct pbuf *buf, void *dataptr, u16_t len, u16_t offset) |
| void * | pbuf_get_contiguous (const struct pbuf *p, void *buffer, size_t bufsize, u16_t len, u16_t offset) |
| struct pbuf * | pbuf_skip (struct pbuf *in, u16_t in_offset, u16_t *out_offset) |
| err_t | pbuf_take (struct pbuf *buf, const void *dataptr, u16_t len) |
| err_t | pbuf_take_at (struct pbuf *buf, const void *dataptr, u16_t len, u16_t offset) |
| struct pbuf * | pbuf_coalesce (struct pbuf *p, pbuf_layer layer) |
| struct pbuf * | pbuf_clone (pbuf_layer layer, pbuf_type type, struct pbuf *p) |
| u8_t | pbuf_get_at (const struct pbuf *p, u16_t offset) |
| int | pbuf_try_get_at (const struct pbuf *p, u16_t offset) |
| void | pbuf_put_at (struct pbuf *p, u16_t offset, u8_t data) |
| u16_t | pbuf_memcmp (const struct pbuf *p, u16_t offset, const void *s2, u16_t n) |
| u16_t | pbuf_memfind (const struct pbuf *p, const void *mem, u16_t mem_len, u16_t start_offset) |
| u16_t | pbuf_strstr (const struct pbuf *p, const char *substr) |
Packet buffer management
| u8_t pbuf_add_header | ( | struct pbuf * | p, |
| size_t | header_size_increment | ||
| ) |
Adjusts the payload pointer to reveal headers in the payload.
Adjusts the ->payload pointer so that space for a header appears in the pbuf payload.
The ->payload, ->tot_len and ->len fields are adjusted.
| p | pbuf to change the header size. |
| header_size_increment | Number of bytes to increment header size which increases the size of the pbuf. New space is on the front. If header_size_increment is 0, this function does nothing and returns successful. |
PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so the call will fail. A check is made that the increase in header size does not move the payload pointer in front of the start of the buffer.
| u8_t pbuf_add_header_force | ( | struct pbuf * | p, |
| size_t | header_size_increment | ||
| ) |
Same as pbuf_add_header but does not check if 'header_size > 0' is allowed. This is used internally only, to allow PBUF_REF for RX.
| u16_t pbuf_clen | ( | const struct pbuf * | p | ) |
Count number of pbufs in a chain
| p | first pbuf of chain |
Dechains the first pbuf from its succeeding pbufs in the chain.
Makes p->tot_len field equal to p->len.
| p | pbuf to dechain |
Similar to pbuf_header(-size) but de-refs header pbufs for (size >= p->len)
| q | pbufs to operate on |
| size | The number of bytes to remove from the beginning of the pbuf list. While size >= p->len, pbufs are freed. ATTENTION: this is the opposite direction as pbuf_header, but takes an u16_t not s16_t! |
| u8_t pbuf_header | ( | struct pbuf * | p, |
| s16_t | header_size_increment | ||
| ) |
Adjusts the payload pointer to hide or reveal headers in the payload.
Adjusts the ->payload pointer so that space for a header (dis)appears in the pbuf payload.
The ->payload, ->tot_len and ->len fields are adjusted.
| p | pbuf to change the header size. |
| header_size_increment | Number of bytes to increment header size which increases the size of the pbuf. New space is on the front. (Using a negative value decreases the header size.) If header_size_increment is 0, this function does nothing and returns successful. |
PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so the call will fail. A check is made that the increase in header size does not move the payload pointer in front of the start of the buffer.
| u8_t pbuf_header_force | ( | struct pbuf * | p, |
| s16_t | header_size_increment | ||
| ) |
Same as pbuf_header but does not check if 'header_size > 0' is allowed. This is used internally only, to allow PBUF_REF for RX.
| u8_t pbuf_remove_header | ( | struct pbuf * | p, |
| size_t | header_size_decrement | ||
| ) |
Adjusts the payload pointer to hide headers in the payload.
Adjusts the ->payload pointer so that space for a header disappears in the pbuf payload.
The ->payload, ->tot_len and ->len fields are adjusted.
| p | pbuf to change the header size. |
| header_size_decrement | Number of bytes to decrement header size which decreases the size of the pbuf. If header_size_decrement is 0, this function does nothing and returns successful. |
| u16_t pbuf_strstr | ( | const struct pbuf * | p, |
| const char * | substr | ||
| ) |
Find occurrence of substr with length substr_len in pbuf p, start at offset start_offset WARNING: in contrast to strstr(), this one does not stop at the first \0 in the pbuf/source string!
| p | pbuf to search, maximum length is 0xFFFE since 0xFFFF is used as return value 'not found' |
| substr | string to search for in p, maximum length is 0xFFFE |