Man page 9 : skb_copy_datagram_const_iovec

skb_copy_datagram_const_iovec - Copy a datagram to an iovec.

int skb_copy_datagram_const_iovec(const struct sk_buff *  skb , int  offset , const struct iovec *  to , int  to_offset , int  len );

skb
    buffer to copy

offset
    offset in the buffer to start copying from

to
    io vector to copy to

to_offset
    offset in the io vector to start copying to

len
    amount of data to copy from buffer to iovec

Returns 0 or -EFAULT.

the iovec is not modified during the copy.