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SKB_CHECKSUM_TRIMMED(9) Linux Networking SKB_CHECKSUM_TRIMMED(9)

NAME

skb_checksum_trimmed - validate checksum of an skb

SYNOPSIS

struct sk_buff * skb_checksum_trimmed(struct sk_buff * skb, unsigned int transport_len, __sum16(*skb_chkf) (struct sk_buff *skb));

ARGUMENTS

struct sk_buff * skb

the skb to check

unsigned int transport_len

the data length beyond the network header

__sum16(*)(struct sk_buff *skb) skb_chkf

checksum function to use

DESCRIPTION

Applies the given checksum function skb_chkf to the provided skb. Returns a checked and maybe trimmed skb. Returns NULL on error.

If the skb has data beyond the given transport length, then a trimmed & cloned skb is checked and returned.

Caller needs to set the skb transport header and free any returned skb if it differs from the provided skb.

COPYRIGHT

September 2017 Kernel Hackers Manual 4.12