mirror of
https://github.com/torvalds/linux.git
synced 2024-11-07 04:32:03 +00:00
ee41e2dff1
[acme@newtoy net-2.6.20]$ pahole /tmp/tcp_ipv6.o inet_protosw
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/net/protocol.h:69 */
struct inet_protosw {
struct list_head list; /* 0 8 */
short unsigned int type; /* 8 2 */
/* XXX 2 bytes hole, try to pack */
int protocol; /* 12 4 */
struct proto * prot; /* 16 4 */
const struct proto_ops * ops; /* 20 4 */
int capability; /* 24 4 */
char no_check; /* 28 1 */
unsigned char flags; /* 29 1 */
}; /* size: 32, sum members: 28, holes: 1, sum holes: 2, padding: 2 */
So that we can kill that hole, protocol can only go all the way to 255 (RAW).
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*
|
|
* 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 protocol dispatcher.
|
|
*
|
|
* Version: @(#)protocol.h 1.0.2 05/07/93
|
|
*
|
|
* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
|
|
*
|
|
* 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.
|
|
*
|
|
* Changes:
|
|
* Alan Cox : Added a name field and a frag handler
|
|
* field for later.
|
|
* Alan Cox : Cleaned up, and sorted types.
|
|
* Pedro Roque : inet6 protocols
|
|
*/
|
|
|
|
#ifndef _PROTOCOL_H
|
|
#define _PROTOCOL_H
|
|
|
|
#include <linux/in6.h>
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
|
#include <linux/ipv6.h>
|
|
#endif
|
|
|
|
#define MAX_INET_PROTOS 256 /* Must be a power of 2 */
|
|
|
|
|
|
/* This is used to register protocols. */
|
|
struct net_protocol {
|
|
int (*handler)(struct sk_buff *skb);
|
|
void (*err_handler)(struct sk_buff *skb, u32 info);
|
|
int (*gso_send_check)(struct sk_buff *skb);
|
|
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
|
|
int features);
|
|
int no_policy;
|
|
};
|
|
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
|
struct inet6_protocol
|
|
{
|
|
int (*handler)(struct sk_buff **skb);
|
|
|
|
void (*err_handler)(struct sk_buff *skb,
|
|
struct inet6_skb_parm *opt,
|
|
int type, int code, int offset,
|
|
__be32 info);
|
|
|
|
int (*gso_send_check)(struct sk_buff *skb);
|
|
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
|
|
int features);
|
|
|
|
unsigned int flags; /* INET6_PROTO_xxx */
|
|
};
|
|
|
|
#define INET6_PROTO_NOPOLICY 0x1
|
|
#define INET6_PROTO_FINAL 0x2
|
|
/* This should be set for any extension header which is compatible with GSO. */
|
|
#define INET6_PROTO_GSO_EXTHDR 0x4
|
|
#endif
|
|
|
|
/* This is used to register socket interfaces for IP protocols. */
|
|
struct inet_protosw {
|
|
struct list_head list;
|
|
|
|
/* These two fields form the lookup key. */
|
|
unsigned short type; /* This is the 2nd argument to socket(2). */
|
|
unsigned short protocol; /* This is the L4 protocol number. */
|
|
|
|
struct proto *prot;
|
|
const struct proto_ops *ops;
|
|
|
|
int capability; /* Which (if any) capability do
|
|
* we need to use this socket
|
|
* interface?
|
|
*/
|
|
char no_check; /* checksum on rcv/xmit/none? */
|
|
unsigned char flags; /* See INET_PROTOSW_* below. */
|
|
};
|
|
#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
|
|
#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
|
|
#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
|
|
|
|
extern struct net_protocol *inet_protocol_base;
|
|
extern struct net_protocol *inet_protos[MAX_INET_PROTOS];
|
|
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
|
extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
|
|
#endif
|
|
|
|
extern int inet_add_protocol(struct net_protocol *prot, unsigned char num);
|
|
extern int inet_del_protocol(struct net_protocol *prot, unsigned char num);
|
|
extern void inet_register_protosw(struct inet_protosw *p);
|
|
extern void inet_unregister_protosw(struct inet_protosw *p);
|
|
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
|
extern int inet6_add_protocol(struct inet6_protocol *prot, unsigned char num);
|
|
extern int inet6_del_protocol(struct inet6_protocol *prot, unsigned char num);
|
|
extern void inet6_register_protosw(struct inet_protosw *p);
|
|
extern void inet6_unregister_protosw(struct inet_protosw *p);
|
|
#endif
|
|
|
|
#endif /* _PROTOCOL_H */
|