skb_pull_rcsum
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## Name

skb_pull_rcsum — pull skb and update receive checksum

## Synopsis

`unsigned char * skb_pull_rcsum (` | struct sk_buff * | skb,
| unsigned int | len`)`;

## Arguments

`skb`

  buffer to update

`len`

  length of data pulled

## Description

This function performs an skb_pull on the packet and updates update the CHECKSUM_COMPLETE checksum. It should be used on receive path processing instead of skb_pull unless you know that the checksum difference is zero (e.g., a valid IP header) or you are setting ip_summed to CHECKSUM_NONE.

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