skbuff.c

来自「Boot code for ADM5120 with serial consol」· C语言 代码 · 共 82 行

/*****************************************************************************
;
;    Project : Edimax
;    Creator :
;    File    : skbuff.c
;    Abstract:
;
;*****************************************************************************/

#include <ctype.h>
#include <skbuff.h>

#include <test_def.h>

// These 2 lines were already commented out
//static struct sk_buff skbuff[2];
//static int skb_cur = 0;


int skb_init()
{
	// These 3 lines were already commented out
	//skbuff = (struct sk_buff *)MemAlloc((sizeof(struct sk_buff)*5), TRUE);
	//if(skbuff = NULL)
	//return -1;
	return 0;
}


void skb_headerinit(struct sk_buff *skb)
{
	memset(skb, 0, sizeof(struct sk_buff));
	skb->data = skb->buf;
	skb->len = 0;
	skb->truesize = ETH_FRAME_LEN;
}


// This function was already commented out
/*struct sk_buff *alloc_skb()
{
	struct sk_buff *skb;
	skb = &skbuff[skb_cur];
	skb_cur = (skb_cur + 1) % 2;
	skb_headerinit(skb);
	return skb;
}*/


/*void free_skb(struct sk_buff *skb)
{
}*/


unsigned char *skb_put(struct sk_buff *skb, unsigned int len)
{
	skb->len += len;
	return skb->data;
}


unsigned char *skb_pull(struct sk_buff *skb, unsigned int len)
{
	skb->data += len;
	skb->len -= len;
	return skb->data;
}


unsigned char *skb_push(struct sk_buff *skb, unsigned int len)
{
	skb->data -= len;
	skb->len += len;
	return skb->data;
}


void skb_reserve(struct sk_buff *skb, unsigned int len)
{
	skb->data += len;
}