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pbuf: Add pbuf_copy_partial_pbuf library function

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Like pbuf_copy, but can copy part of a pbuf to an offset in another.
pbuf_copy now uses this function internally.

Replace pbuf_take_at loop in icmp6 with pbuf_copy_partial_pbuf().
This commit is contained in:
Erik Ekman
2020-06-29 20:44:38 +02:00
parent 942ca825d0
commit 2bf8fcd7c2
4 changed files with 93 additions and 20 deletions
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src/include/lwip/pbuf.h
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@@ -296,6 +296,7 @@ void pbuf_cat(struct pbuf *head, struct pbuf *tail);
void pbuf_chain(struct pbuf *head, struct pbuf *tail);
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 *p, 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);
err_t pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len);