78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
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/*
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* NET Generic infrastructure for Network protocols.
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*
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* Definitions for request_sock
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*
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* Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*
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* From code originally in include/net/tcp.h
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _REQUEST_SOCK_H
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#define _REQUEST_SOCK_H
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <net/sock.h>
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struct open_request;
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struct sk_buff;
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struct dst_entry;
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struct proto;
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struct or_calltable {
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int family;
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kmem_cache_t *slab;
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int obj_size;
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int (*rtx_syn_ack)(struct sock *sk,
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struct open_request *req,
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struct dst_entry *dst);
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void (*send_ack)(struct sk_buff *skb,
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struct open_request *req);
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void (*send_reset)(struct sk_buff *skb);
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void (*destructor)(struct open_request *req);
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};
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/* struct open_request - mini sock to represent a connection request
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*/
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struct open_request {
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struct open_request *dl_next; /* Must be first member! */
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u16 mss;
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u8 retrans;
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u8 __pad;
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/* The following two fields can be easily recomputed I think -AK */
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u32 window_clamp; /* window clamp at creation time */
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u32 rcv_wnd; /* rcv_wnd offered first time */
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u32 ts_recent;
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unsigned long expires;
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struct or_calltable *class;
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struct sock *sk;
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};
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static inline struct open_request *tcp_openreq_alloc(struct or_calltable *class)
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{
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struct open_request *req = kmem_cache_alloc(class->slab, SLAB_ATOMIC);
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if (req != NULL)
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req->class = class;
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return req;
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}
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static inline void tcp_openreq_fastfree(struct open_request *req)
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{
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kmem_cache_free(req->class->slab, req);
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}
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static inline void tcp_openreq_free(struct open_request *req)
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{
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req->class->destructor(req);
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tcp_openreq_fastfree(req);
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}
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#endif /* _REQUEST_SOCK_H */
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