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/*
* NET Generic infrastructure for Network protocols.
*
* Definitions for request_sock
*
* Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* From code originally in include/net/tcp.h
*
* 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 _REQUEST_SOCK_H
#define _REQUEST_SOCK_H
#include <linux/slab.h>
#include <linux/types.h>
#include <net/sock.h>
struct request_sock;
struct sk_buff;
struct dst_entry;
struct proto;
struct request_sock_ops {
int family;
kmem_cache_t *slab;
int obj_size;
int (*rtx_syn_ack)(struct sock *sk,
struct request_sock *req,
struct dst_entry *dst);
void (*send_ack)(struct sk_buff *skb,
struct request_sock *req);
void (*send_reset)(struct sk_buff *skb);
void (*destructor)(struct request_sock *req);
};
/* struct request_sock - mini sock to represent a connection request
*/
struct request_sock {
struct request_sock *dl_next; /* Must be first member! */
u16 mss;
u8 retrans;
u8 __pad;
/* The following two fields can be easily recomputed I think -AK */
u32 window_clamp; /* window clamp at creation time */
u32 rcv_wnd; /* rcv_wnd offered first time */
u32 ts_recent;
unsigned long expires;
struct request_sock_ops *rsk_ops;
struct sock *sk;
};
static inline struct request_sock *reqsk_alloc(struct request_sock_ops *ops)
{
struct request_sock *req = kmem_cache_alloc(ops->slab, SLAB_ATOMIC);
if (req != NULL)
req->rsk_ops = ops;
return req;
}
static inline void __reqsk_free(struct request_sock *req)
{
kmem_cache_free(req->rsk_ops->slab, req);
}
static inline void reqsk_free(struct request_sock *req)
{
req->rsk_ops->destructor(req);
__reqsk_free(req);
}
#endif /* _REQUEST_SOCK_H */
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