IP checksum calculation functions. More...

Functions
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).
u16_t	lwip_chksum_copy (void dst, const void src, u16_t len)
	Safe but slow: first call MEMCPY, then call LWIP_CHKSUM.
u16_t	ip6_chksum_pseudo (struct pbuf p, u8_t proto, u16_t proto_len, const ip6_addr_t src, const ip6_addr_t *dest)
	Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain.
u16_t	ip6_chksum_pseudo_partial (struct pbuf p, u8_t proto, u16_t proto_len, u16_t chksum_len, const ip6_addr_t src, const ip6_addr_t *dest)
	Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain.

Detailed Description

IP checksum calculation functions.

Definition in file inet_chksum.h.

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

Definition at line 568 of file lwip_inet_chksum.c.

Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain.

IPv6 addresses are expected to be in network byte order.

Parameters:

p	chain of pbufs over that a checksum should be calculated (ip data part)
proto	ipv6 protocol/next header (used for checksum of pseudo header)
proto_len	length of the ipv6 payload (used for checksum of pseudo header)
src	source ipv6 address (used for checksum of pseudo header)
dest	destination ipv6 address (used for checksum of pseudo header)

Definition at line 343 of file lwip_inet_chksum.c.

Calculates the checksum with IPv6 pseudo header used by TCP and UDP for a pbuf chain.

IPv6 addresses are expected to be in network byte order. Will only compute for a portion of the payload.

Parameters:

p	chain of pbufs over that a checksum should be calculated (ip data part)
proto	ipv6 protocol/next header (used for checksum of pseudo header)
proto_len	length of the ipv6 payload (used for checksum of pseudo header)
chksum_len	number of payload bytes used to compute chksum
src	source ipv6 address (used for checksum of pseudo header)
dest	destination ipv6 address (used for checksum of pseudo header)

Definition at line 491 of file lwip_inet_chksum.c.

Safe but slow: first call MEMCPY, then call LWIP_CHKSUM.

For architectures with big caches, data might still be in cache when generating the checksum after copying.

Definition at line 604 of file lwip_inet_chksum.c.