SKB_POSTPULL_RCSUM - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Linux Networking

NAMEskb_postpull_rcsum − update checksum for received skb after pull

SYNOPSISvoid skb_postpull_rcsum(struct sk_buff * skb, const void * start, unsigned int len);

ARGUMENTSskb buffer to update start start of data before pull len length of data pulled

DESCRIPTIONAfter doing a pull on a received packet, you need to call this to update the CHECKSUM_COMPLETE checksum, or set ip_summed to CHECKSUM_NONE so that it can be recomputed from scratch​.

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