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/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Definitions for the 'struct sk_buff' memory handlers.
*
* Version: @(#)skbuff.h 1.0.4 05/20/93
*
* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Corey Minyard <wf-rch!minyard@relay.EU.net>
*
* Fixes:
* Alan Cox : Volatiles (this makes me unhappy - we want proper asm linked list stuff)
* Alan Cox : Declaration for new primitives
* Alan Cox : Fraglist support (idea by Donald Becker)
* Alan Cox : 'users' counter. Combines with datagram changes to avoid skb_peek_copy
* being used.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _SKBUFF_H
#define _SKBUFF_H
#include <linux/malloc.h>
#ifdef CONFIG_IPX
#include "ipx.h"
#endif
#define HAVE_ALLOC_SKB /* For the drivers to know */
#define FREE_READ 1
#define FREE_WRITE 0
struct sk_buff {
unsigned long magic_debug_cookie;
struct sk_buff *volatile next;
struct sk_buff *volatile prev;
struct sk_buff *volatile link3;
struct sk_buff *volatile* list;
struct sock *sk;
volatile unsigned long when; /* used to compute rtt's */
struct device *dev;
void *mem_addr;
union {
struct tcphdr *th;
struct ethhdr *eth;
struct iphdr *iph;
struct udphdr *uh;
struct arphdr *arp;
unsigned char *raw;
unsigned long seq;
#ifdef CONFIG_IPX
ipx_packet *ipx;
#endif
} h;
struct iphdr *ip_hdr; /* For IPPROTO_RAW */
unsigned long mem_len;
unsigned long len;
unsigned long fraglen;
struct sk_buff *fraglist; /* Fragment list */
unsigned long truesize;
unsigned long saddr;
unsigned long daddr;
int magic;
volatile char acked,
used,
free,
arp;
unsigned char tries,lock; /* Lock is now unused */
unsigned short users; /* User count - see datagram.c (and soon seqpacket.c/stream.c) */
unsigned long padding[0];
unsigned char data[0];
};
#define SK_WMEM_MAX 8192
#define SK_RMEM_MAX 32767
#define SK_FREED_SKB 0x0DE2C0DE
#define SK_GOOD_SKB 0xDEC0DED1
extern void print_skb(struct sk_buff *);
extern void kfree_skb(struct sk_buff *skb, int rw);
extern void skb_queue_head(struct sk_buff * volatile *list,struct sk_buff *buf);
extern void skb_queue_tail(struct sk_buff * volatile *list,struct sk_buff *buf);
extern struct sk_buff * skb_dequeue(struct sk_buff * volatile *list);
extern void skb_insert(struct sk_buff *old,struct sk_buff *newsk);
extern void skb_append(struct sk_buff *old,struct sk_buff *newsk);
extern void skb_unlink(struct sk_buff *buf);
extern void skb_new_list_head(struct sk_buff *volatile* list);
extern struct sk_buff * skb_peek(struct sk_buff * volatile *list);
extern struct sk_buff * skb_peek_copy(struct sk_buff * volatile *list);
extern struct sk_buff * alloc_skb(unsigned int size, int priority);
extern void kfree_skbmem(void *mem, unsigned size);
extern void skb_kept_by_device(struct sk_buff *skb);
extern void skb_device_release(struct sk_buff *skb, int mode);
extern int skb_device_locked(struct sk_buff *skb);
extern void skb_check(struct sk_buff *skb,int, char *);
#define IS_SKB(skb) skb_check((skb),__LINE__,__FILE__)
extern struct sk_buff * skb_recv_datagram(struct sock *sk,unsigned flags,int noblock, int *err);
extern int datagram_select(struct sock *sk, int sel_type, select_table *wait);
extern void skb_copy_datagram(struct sk_buff *from, int offset, char *to,int size);
extern void skb_free_datagram(struct sk_buff *skb);
#endif /* _SKBUFF_H */