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
       skb
           the skb to check

       transport_len
           the data length beyond the network header

       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
Kernel Hackers Manual 4.8.                 January 2017                   SKB_CHECKSUM_TRIMMED(9)