| Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * NET Generic infrastructure for INET connection oriented protocols. |
| 3 | * |
| 4 | * Definitions for inet_connection_sock |
| 5 | * |
| 6 | * Authors: Many people, see the TCP sources |
| 7 | * |
| 8 | * From code originally in TCP |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation; either version |
| 13 | * 2 of the License, or (at your option) any later version. |
| 14 | */ |
| 15 | #ifndef _INET_CONNECTION_SOCK_H |
| 16 | #define _INET_CONNECTION_SOCK_H |
| 17 | |
| 18 | #include <linux/ip.h> |
| 19 | #include <linux/timer.h> |
| 20 | #include <net/request_sock.h> |
| 21 | |
| 22 | struct inet_bind_bucket; |
| 23 | struct inet_hashinfo; |
| 24 | |
| 25 | /** inet_connection_sock - INET connection oriented sock |
| 26 | * |
| 27 | * @icsk_accept_queue: FIFO of established children |
| 28 | * @icsk_bind_hash: Bind node |
| 29 | * @icsk_timeout: Timeout |
| 30 | * @icsk_retransmit_timer: Resend (no ack) |
| 31 | * @icsk_rto: Retransmit timeout |
| 32 | * @icsk_retransmits: Number of unrecovered [RTO] timeouts |
| 33 | * @icsk_pending: Scheduled timer event |
| 34 | * @icsk_backoff: Backoff |
| 35 | * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries |
| 36 | * @icsk_ack: Delayed ACK control data |
| 37 | */ |
| 38 | struct inet_connection_sock { |
| 39 | /* inet_sock has to be the first member! */ |
| 40 | struct inet_sock icsk_inet; |
| 41 | struct request_sock_queue icsk_accept_queue; |
| 42 | struct inet_bind_bucket *icsk_bind_hash; |
| 43 | unsigned long icsk_timeout; |
| 44 | struct timer_list icsk_retransmit_timer; |
| 45 | struct timer_list icsk_delack_timer; |
| 46 | __u32 icsk_rto; |
| 47 | __u8 icsk_retransmits; |
| 48 | __u8 icsk_pending; |
| 49 | __u8 icsk_backoff; |
| 50 | __u8 icsk_syn_retries; |
| 51 | struct { |
| 52 | __u8 pending; /* ACK is pending */ |
| 53 | __u8 quick; /* Scheduled number of quick acks */ |
| 54 | __u8 pingpong; /* The session is interactive */ |
| 55 | __u8 blocked; /* Delayed ACK was blocked by socket lock */ |
| 56 | __u32 ato; /* Predicted tick of soft clock */ |
| 57 | unsigned long timeout; /* Currently scheduled timeout */ |
| 58 | __u32 lrcvtime; /* timestamp of last received data packet */ |
| 59 | __u16 last_seg_size; /* Size of last incoming segment */ |
| 60 | __u16 rcv_mss; /* MSS used for delayed ACK decisions */ |
| 61 | } icsk_ack; |
| 62 | }; |
| 63 | |
| 64 | static inline struct inet_connection_sock *inet_csk(const struct sock *sk) |
| 65 | { |
| 66 | return (struct inet_connection_sock *)sk; |
| 67 | } |
| 68 | |
| 69 | extern void inet_csk_init_xmit_timers(struct sock *sk, |
| 70 | void (*retransmit_handler)(unsigned long), |
| 71 | void (*delack_handler)(unsigned long), |
| 72 | void (*keepalive_handler)(unsigned long)); |
| 73 | extern void inet_csk_clear_xmit_timers(struct sock *sk); |
| 74 | |
| 75 | extern struct request_sock *inet_csk_search_req(const struct sock *sk, |
| 76 | struct request_sock ***prevp, |
| 77 | const __u16 rport, |
| 78 | const __u32 raddr, |
| 79 | const __u32 laddr); |
| 80 | extern int inet_csk_get_port(struct inet_hashinfo *hashinfo, |
| 81 | struct sock *sk, unsigned short snum); |
| 82 | |
| 83 | extern struct dst_entry* inet_csk_route_req(struct sock *sk, |
| 84 | const struct request_sock *req); |
| 85 | |
| 86 | #endif /* _INET_CONNECTION_SOCK_H */ |