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87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
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/*
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* NET Generic infrastructure for INET connection oriented protocols.
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*
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* Definitions for inet_connection_sock
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*
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* Authors: Many people, see the TCP sources
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*
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* From code originally in TCP
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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 _INET_CONNECTION_SOCK_H
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#define _INET_CONNECTION_SOCK_H
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#include <linux/ip.h>
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#include <linux/timer.h>
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#include <net/request_sock.h>
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struct inet_bind_bucket;
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struct inet_hashinfo;
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/** inet_connection_sock - INET connection oriented sock
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*
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* @icsk_accept_queue: FIFO of established children
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* @icsk_bind_hash: Bind node
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* @icsk_timeout: Timeout
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* @icsk_retransmit_timer: Resend (no ack)
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* @icsk_rto: Retransmit timeout
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* @icsk_retransmits: Number of unrecovered [RTO] timeouts
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* @icsk_pending: Scheduled timer event
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* @icsk_backoff: Backoff
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* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
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* @icsk_ack: Delayed ACK control data
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*/
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struct inet_connection_sock {
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/* inet_sock has to be the first member! */
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struct inet_sock icsk_inet;
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struct request_sock_queue icsk_accept_queue;
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struct inet_bind_bucket *icsk_bind_hash;
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unsigned long icsk_timeout;
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struct timer_list icsk_retransmit_timer;
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struct timer_list icsk_delack_timer;
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__u32 icsk_rto;
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__u8 icsk_retransmits;
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__u8 icsk_pending;
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__u8 icsk_backoff;
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__u8 icsk_syn_retries;
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struct {
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__u8 pending; /* ACK is pending */
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__u8 quick; /* Scheduled number of quick acks */
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__u8 pingpong; /* The session is interactive */
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__u8 blocked; /* Delayed ACK was blocked by socket lock */
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__u32 ato; /* Predicted tick of soft clock */
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unsigned long timeout; /* Currently scheduled timeout */
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__u32 lrcvtime; /* timestamp of last received data packet */
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__u16 last_seg_size; /* Size of last incoming segment */
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__u16 rcv_mss; /* MSS used for delayed ACK decisions */
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} icsk_ack;
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};
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static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
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{
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return (struct inet_connection_sock *)sk;
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}
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extern void inet_csk_init_xmit_timers(struct sock *sk,
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void (*retransmit_handler)(unsigned long),
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void (*delack_handler)(unsigned long),
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void (*keepalive_handler)(unsigned long));
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extern void inet_csk_clear_xmit_timers(struct sock *sk);
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extern struct request_sock *inet_csk_search_req(const struct sock *sk,
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struct request_sock ***prevp,
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const __u16 rport,
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const __u32 raddr,
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const __u32 laddr);
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extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
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struct sock *sk, unsigned short snum);
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extern struct dst_entry* inet_csk_route_req(struct sock *sk,
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const struct request_sock *req);
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#endif /* _INET_CONNECTION_SOCK_H */
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