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skb_push(9) [centos man page]

SKB_PUSH(9)							 Linux Networking						       SKB_PUSH(9)

NAME
skb_push - add data to the start of a buffer SYNOPSIS
unsigned char * skb_push(struct sk_buff * skb, unsigned int len); ARGUMENTS
skb buffer to use len amount of data to add DESCRIPTION
This function extends the used data area of the buffer at the buffer start. If this would exceed the total buffer headroom the kernel will panic. A pointer to the first byte of the extra data is returned. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SKB_PUSH(9)

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WIMAX_MSG_ALLOC(9)						 Linux Networking						WIMAX_MSG_ALLOC(9)

NAME
wimax_msg_alloc - Create a new skb for sending a message to userspace SYNOPSIS
struct sk_buff * wimax_msg_alloc(struct wimax_dev * wimax_dev, const char * pipe_name, const void * msg, size_t size, gfp_t gfp_flags); ARGUMENTS
wimax_dev WiMAX device descriptor pipe_name "named pipe" the message will be sent to msg pointer to the message data to send size size of the message to send (in bytes), including the header. gfp_flags flags for memory allocation. RETURNS
0 if ok, negative errno code on error DESCRIPTION
Allocates an skb that will contain the message to send to user space over the messaging pipe and initializes it, copying the payload. Once this call is done, you can deliver it with wimax_msg_send. IMPORTANT
Don't use skb_push/skb_pull/skb_reserve on the skb, as wimax_msg_send depends on skb->data being placed at the beginning of the user message. Unlike other WiMAX stack calls, this call can be used way early, even before wimax_dev_add is called, as long as the wimax_dev->net_dev pointer is set to point to a proper net_dev. This is so that drivers can use it early in case they need to send stuff around or communicate with user space. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 WIMAX_MSG_ALLOC(9)
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