91f0ebf7b6
1. No need for ->ccid_init nor ->ccid_exit, this is what module_{init,exit}
does and anynways neither ccid2 nor ccid3 were using it.
2. Rename struct ccid to struct ccid_operations and introduce struct ccid
with a pointer to ccid_operations and rigth after it the rx or tx
private state.
3. Remove the pointer to the state of the half connections from struct
dccp_sock, now its derived thru ccid_priv() from the ccid pointer.
Now we also can implement the setsockopt for changing the CCID easily as
no ccid init routines can affect struct dccp_sock in any way that prevents
other CCIDs from working if a CCID switch operation is asked by apps.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
199 lines
5.9 KiB
C
199 lines
5.9 KiB
C
#ifndef _CCID_H
|
|
#define _CCID_H
|
|
/*
|
|
* net/dccp/ccid.h
|
|
*
|
|
* An implementation of the DCCP protocol
|
|
* Arnaldo Carvalho de Melo <acme@conectiva.com.br>
|
|
*
|
|
* CCID infrastructure
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <net/sock.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/dccp.h>
|
|
#include <linux/list.h>
|
|
#include <linux/module.h>
|
|
|
|
#define CCID_MAX 255
|
|
|
|
struct tcp_info;
|
|
|
|
struct ccid_operations {
|
|
unsigned char ccid_id;
|
|
const char *ccid_name;
|
|
struct module *ccid_owner;
|
|
kmem_cache_t *ccid_hc_rx_slab;
|
|
__u32 ccid_hc_rx_obj_size;
|
|
kmem_cache_t *ccid_hc_tx_slab;
|
|
__u32 ccid_hc_tx_obj_size;
|
|
int (*ccid_hc_rx_init)(struct ccid *ccid, struct sock *sk);
|
|
int (*ccid_hc_tx_init)(struct ccid *ccid, struct sock *sk);
|
|
void (*ccid_hc_rx_exit)(struct sock *sk);
|
|
void (*ccid_hc_tx_exit)(struct sock *sk);
|
|
void (*ccid_hc_rx_packet_recv)(struct sock *sk,
|
|
struct sk_buff *skb);
|
|
int (*ccid_hc_rx_parse_options)(struct sock *sk,
|
|
unsigned char option,
|
|
unsigned char len, u16 idx,
|
|
unsigned char* value);
|
|
void (*ccid_hc_rx_insert_options)(struct sock *sk,
|
|
struct sk_buff *skb);
|
|
void (*ccid_hc_tx_insert_options)(struct sock *sk,
|
|
struct sk_buff *skb);
|
|
void (*ccid_hc_tx_packet_recv)(struct sock *sk,
|
|
struct sk_buff *skb);
|
|
int (*ccid_hc_tx_parse_options)(struct sock *sk,
|
|
unsigned char option,
|
|
unsigned char len, u16 idx,
|
|
unsigned char* value);
|
|
int (*ccid_hc_tx_send_packet)(struct sock *sk,
|
|
struct sk_buff *skb, int len);
|
|
void (*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
|
|
int len);
|
|
void (*ccid_hc_rx_get_info)(struct sock *sk,
|
|
struct tcp_info *info);
|
|
void (*ccid_hc_tx_get_info)(struct sock *sk,
|
|
struct tcp_info *info);
|
|
int (*ccid_hc_rx_getsockopt)(struct sock *sk,
|
|
const int optname, int len,
|
|
u32 __user *optval,
|
|
int __user *optlen);
|
|
int (*ccid_hc_tx_getsockopt)(struct sock *sk,
|
|
const int optname, int len,
|
|
u32 __user *optval,
|
|
int __user *optlen);
|
|
};
|
|
|
|
extern int ccid_register(struct ccid_operations *ccid_ops);
|
|
extern int ccid_unregister(struct ccid_operations *ccid_ops);
|
|
|
|
struct ccid {
|
|
struct ccid_operations *ccid_ops;
|
|
char ccid_priv[0];
|
|
};
|
|
|
|
static inline void *ccid_priv(const struct ccid *ccid)
|
|
{
|
|
return (void *)ccid->ccid_priv;
|
|
}
|
|
|
|
extern struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx,
|
|
gfp_t gfp);
|
|
|
|
extern struct ccid *ccid_hc_rx_new(unsigned char id, struct sock *sk,
|
|
gfp_t gfp);
|
|
extern struct ccid *ccid_hc_tx_new(unsigned char id, struct sock *sk,
|
|
gfp_t gfp);
|
|
|
|
extern void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
|
|
extern void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);
|
|
|
|
static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
|
|
struct sk_buff *skb, int len)
|
|
{
|
|
int rc = 0;
|
|
if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
|
|
rc = ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb, len);
|
|
return rc;
|
|
}
|
|
|
|
static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
|
|
int more, int len)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
|
|
ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, more, len);
|
|
}
|
|
|
|
static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
|
|
ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
|
|
}
|
|
|
|
static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
|
|
ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
|
|
}
|
|
|
|
static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
|
|
unsigned char option,
|
|
unsigned char len, u16 idx,
|
|
unsigned char* value)
|
|
{
|
|
int rc = 0;
|
|
if (ccid->ccid_ops->ccid_hc_tx_parse_options != NULL)
|
|
rc = ccid->ccid_ops->ccid_hc_tx_parse_options(sk, option, len, idx,
|
|
value);
|
|
return rc;
|
|
}
|
|
|
|
static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
|
|
unsigned char option,
|
|
unsigned char len, u16 idx,
|
|
unsigned char* value)
|
|
{
|
|
int rc = 0;
|
|
if (ccid->ccid_ops->ccid_hc_rx_parse_options != NULL)
|
|
rc = ccid->ccid_ops->ccid_hc_rx_parse_options(sk, option, len, idx, value);
|
|
return rc;
|
|
}
|
|
|
|
static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_tx_insert_options != NULL)
|
|
ccid->ccid_ops->ccid_hc_tx_insert_options(sk, skb);
|
|
}
|
|
|
|
static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
|
|
ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
|
|
}
|
|
|
|
static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
|
|
struct tcp_info *info)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
|
|
ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
|
|
}
|
|
|
|
static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
|
|
struct tcp_info *info)
|
|
{
|
|
if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
|
|
ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
|
|
}
|
|
|
|
static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
|
|
const int optname, int len,
|
|
u32 __user *optval, int __user *optlen)
|
|
{
|
|
int rc = -ENOPROTOOPT;
|
|
if (ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
|
|
rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
|
|
optval, optlen);
|
|
return rc;
|
|
}
|
|
|
|
static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
|
|
const int optname, int len,
|
|
u32 __user *optval, int __user *optlen)
|
|
{
|
|
int rc = -ENOPROTOOPT;
|
|
if (ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
|
|
rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
|
|
optval, optlen);
|
|
return rc;
|
|
}
|
|
#endif /* _CCID_H */
|