Include dependency graph for inet_chksum.h:
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Macros | |
| #define | SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8) |
| #define | FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL)) |
| #define | LWIP_CHKSUM_COPY_ALGORITHM 0 |
Functions | |
| u16_t | inet_chksum (const void *dataptr, u16_t len) |
| u16_t | inet_chksum_pbuf (struct pbuf *p) |
| u16_t | ip_chksum_pseudo (struct pbuf *p, u8_t proto, u16_t proto_len, const ip_addr_t *src, const ip_addr_t *dest) |
| u16_t | ip_chksum_pseudo_partial (struct pbuf *p, u8_t proto, u16_t proto_len, u16_t chksum_len, const ip_addr_t *src, const ip_addr_t *dest) |
Detailed Description
IP checksum calculation functions
Definition in file inet_chksum.h.
Macro Definition Documentation
| #define FOLD_U32T | ( | u | ) | (((u) >> 16) + ((u) & 0x0000ffffUL)) |
Split an u32_t in two u16_ts and add them up
Definition at line 71 of file inet_chksum.h.
Referenced by inet_chksum_pbuf(), and pbuf_coalesce().
| #define SWAP_BYTES_IN_WORD | ( | w | ) | (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8) |
Swap the bytes in an u16_t: much like lwip_htons() for little-endian
Definition at line 66 of file inet_chksum.h.
Referenced by inet_chksum_pbuf(), and pbuf_coalesce().
Function Documentation
| u16_t inet_chksum_pbuf | ( | struct pbuf * | p | ) |
Calculate a checksum over a chain of pbufs (without pseudo-header, much like inet_chksum only pbufs are used).
- Parameters
-
p pbuf chain over that the checksum should be calculated
- Returns
- checksum (as u16_t) to be saved directly in the protocol header
Definition at line 587 of file inet_chksum.c.
References FOLD_U32T, pbuf::len, pbuf::next, pbuf::payload, and SWAP_BYTES_IN_WORD.
