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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 */
-