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 | |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 18 | #include <linux/compiler.h> |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 19 | #include <linux/string.h> |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 20 | #include <linux/timer.h> |
Al Viro | bd01f84 | 2006-10-19 17:23:57 -0400 | [diff] [blame] | 21 | #include <linux/poll.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 22 | |
| 23 | #include <net/inet_sock.h> |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 24 | #include <net/request_sock.h> |
| 25 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 26 | #define INET_CSK_DEBUG 1 |
| 27 | |
| 28 | /* Cancel timers, when they are not required. */ |
| 29 | #undef INET_CSK_CLEAR_TIMERS |
| 30 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 31 | struct inet_bind_bucket; |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 32 | struct tcp_congestion_ops; |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 33 | |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 34 | /* |
| 35 | * Pointers to address related TCP functions |
| 36 | * (i.e. things that depend on the address family) |
| 37 | */ |
| 38 | struct inet_connection_sock_af_ops { |
David S. Miller | d9d8da8 | 2011-05-06 22:23:20 -0700 | [diff] [blame] | 39 | int (*queue_xmit)(struct sk_buff *skb, struct flowi *fl); |
Herbert Xu | bb29624 | 2010-04-11 02:15:55 +0000 | [diff] [blame] | 40 | void (*send_check)(struct sock *sk, struct sk_buff *skb); |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 41 | int (*rebuild_header)(struct sock *sk); |
| 42 | int (*conn_request)(struct sock *sk, struct sk_buff *skb); |
| 43 | struct sock *(*syn_recv_sock)(struct sock *sk, struct sk_buff *skb, |
| 44 | struct request_sock *req, |
| 45 | struct dst_entry *dst); |
David S. Miller | 3f419d2 | 2010-11-29 13:37:14 -0800 | [diff] [blame] | 46 | struct inet_peer *(*get_peer)(struct sock *sk, bool *release_it); |
Arnaldo Carvalho de Melo | 850db6b | 2006-11-27 17:56:43 -0200 | [diff] [blame] | 47 | u16 net_header_len; |
Eric Dumazet | 6746960 | 2012-04-24 07:37:38 +0000 | [diff] [blame^] | 48 | u16 net_frag_header_len; |
Arnaldo Carvalho de Melo | 850db6b | 2006-11-27 17:56:43 -0200 | [diff] [blame] | 49 | u16 sockaddr_len; |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 50 | int (*setsockopt)(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 51 | char __user *optval, unsigned int optlen); |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 52 | int (*getsockopt)(struct sock *sk, int level, int optname, |
| 53 | char __user *optval, int __user *optlen); |
Alexey Dobriyan | af01d53 | 2008-08-28 02:53:51 -0700 | [diff] [blame] | 54 | #ifdef CONFIG_COMPAT |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 55 | int (*compat_setsockopt)(struct sock *sk, |
| 56 | int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 57 | char __user *optval, unsigned int optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 58 | int (*compat_getsockopt)(struct sock *sk, |
| 59 | int level, int optname, |
| 60 | char __user *optval, int __user *optlen); |
Alexey Dobriyan | af01d53 | 2008-08-28 02:53:51 -0700 | [diff] [blame] | 61 | #endif |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 62 | void (*addr2sockaddr)(struct sock *sk, struct sockaddr *); |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 63 | int (*bind_conflict)(const struct sock *sk, |
Alex Copot | aacd928 | 2012-04-12 22:21:45 +0000 | [diff] [blame] | 64 | const struct inet_bind_bucket *tb, bool relax); |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 65 | }; |
| 66 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 67 | /** inet_connection_sock - INET connection oriented sock |
| 68 | * |
| 69 | * @icsk_accept_queue: FIFO of established children |
| 70 | * @icsk_bind_hash: Bind node |
| 71 | * @icsk_timeout: Timeout |
| 72 | * @icsk_retransmit_timer: Resend (no ack) |
| 73 | * @icsk_rto: Retransmit timeout |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 74 | * @icsk_pmtu_cookie Last pmtu seen by socket |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 75 | * @icsk_ca_ops Pluggable congestion control hook |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 76 | * @icsk_af_ops Operations which are AF_INET{4,6} specific |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 77 | * @icsk_ca_state: Congestion control state |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 78 | * @icsk_retransmits: Number of unrecovered [RTO] timeouts |
| 79 | * @icsk_pending: Scheduled timer event |
| 80 | * @icsk_backoff: Backoff |
| 81 | * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 82 | * @icsk_probes_out: unanswered 0 window probes |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 83 | * @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options) |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 84 | * @icsk_ack: Delayed ACK control data |
John Heffner | 5d424d5 | 2006-03-20 17:53:41 -0800 | [diff] [blame] | 85 | * @icsk_mtup; MTU probing control data |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 86 | */ |
| 87 | struct inet_connection_sock { |
| 88 | /* inet_sock has to be the first member! */ |
| 89 | struct inet_sock icsk_inet; |
| 90 | struct request_sock_queue icsk_accept_queue; |
| 91 | struct inet_bind_bucket *icsk_bind_hash; |
| 92 | unsigned long icsk_timeout; |
| 93 | struct timer_list icsk_retransmit_timer; |
| 94 | struct timer_list icsk_delack_timer; |
| 95 | __u32 icsk_rto; |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 96 | __u32 icsk_pmtu_cookie; |
Stephen Hemminger | 770cfbc | 2006-01-09 15:56:09 -0800 | [diff] [blame] | 97 | const struct tcp_congestion_ops *icsk_ca_ops; |
| 98 | const struct inet_connection_sock_af_ops *icsk_af_ops; |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 99 | unsigned int (*icsk_sync_mss)(struct sock *sk, u32 pmtu); |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 100 | __u8 icsk_ca_state; |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 101 | __u8 icsk_retransmits; |
| 102 | __u8 icsk_pending; |
| 103 | __u8 icsk_backoff; |
| 104 | __u8 icsk_syn_retries; |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 105 | __u8 icsk_probes_out; |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 106 | __u16 icsk_ext_hdr_len; |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 107 | struct { |
| 108 | __u8 pending; /* ACK is pending */ |
| 109 | __u8 quick; /* Scheduled number of quick acks */ |
| 110 | __u8 pingpong; /* The session is interactive */ |
| 111 | __u8 blocked; /* Delayed ACK was blocked by socket lock */ |
| 112 | __u32 ato; /* Predicted tick of soft clock */ |
| 113 | unsigned long timeout; /* Currently scheduled timeout */ |
| 114 | __u32 lrcvtime; /* timestamp of last received data packet */ |
| 115 | __u16 last_seg_size; /* Size of last incoming segment */ |
| 116 | __u16 rcv_mss; /* MSS used for delayed ACK decisions */ |
| 117 | } icsk_ack; |
John Heffner | 5d424d5 | 2006-03-20 17:53:41 -0800 | [diff] [blame] | 118 | struct { |
| 119 | int enabled; |
| 120 | |
| 121 | /* Range of MTUs to search */ |
| 122 | int search_high; |
| 123 | int search_low; |
| 124 | |
| 125 | /* Information on the current probe. */ |
| 126 | int probe_size; |
John Heffner | 5d424d5 | 2006-03-20 17:53:41 -0800 | [diff] [blame] | 127 | } icsk_mtup; |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 128 | u32 icsk_ca_priv[16]; |
Jerry Chu | dca43c7 | 2010-08-27 19:13:28 +0000 | [diff] [blame] | 129 | u32 icsk_user_timeout; |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 130 | #define ICSK_CA_PRIV_SIZE (16 * sizeof(u32)) |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 131 | }; |
| 132 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 133 | #define ICSK_TIME_RETRANS 1 /* Retransmit timer */ |
| 134 | #define ICSK_TIME_DACK 2 /* Delayed ack timer */ |
| 135 | #define ICSK_TIME_PROBE0 3 /* Zero window probe timer */ |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 136 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 137 | static inline struct inet_connection_sock *inet_csk(const struct sock *sk) |
| 138 | { |
| 139 | return (struct inet_connection_sock *)sk; |
| 140 | } |
| 141 | |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 142 | static inline void *inet_csk_ca(const struct sock *sk) |
| 143 | { |
| 144 | return (void *)inet_csk(sk)->icsk_ca_priv; |
| 145 | } |
| 146 | |
Eric Dumazet | e56c57d | 2011-11-08 17:07:07 -0500 | [diff] [blame] | 147 | extern struct sock *inet_csk_clone_lock(const struct sock *sk, |
| 148 | const struct request_sock *req, |
| 149 | const gfp_t priority); |
Arnaldo Carvalho de Melo | 9f1d260 | 2005-08-09 20:11:24 -0700 | [diff] [blame] | 150 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 151 | enum inet_csk_ack_state_t { |
| 152 | ICSK_ACK_SCHED = 1, |
| 153 | ICSK_ACK_TIMER = 2, |
Alexey Kuznetsov | 1ef9696 | 2006-09-19 12:52:50 -0700 | [diff] [blame] | 154 | ICSK_ACK_PUSHED = 4, |
| 155 | ICSK_ACK_PUSHED2 = 8 |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 156 | }; |
| 157 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 158 | extern void inet_csk_init_xmit_timers(struct sock *sk, |
| 159 | void (*retransmit_handler)(unsigned long), |
| 160 | void (*delack_handler)(unsigned long), |
| 161 | void (*keepalive_handler)(unsigned long)); |
| 162 | extern void inet_csk_clear_xmit_timers(struct sock *sk); |
| 163 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 164 | static inline void inet_csk_schedule_ack(struct sock *sk) |
| 165 | { |
| 166 | inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED; |
| 167 | } |
| 168 | |
| 169 | static inline int inet_csk_ack_scheduled(const struct sock *sk) |
| 170 | { |
| 171 | return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED; |
| 172 | } |
| 173 | |
| 174 | static inline void inet_csk_delack_init(struct sock *sk) |
| 175 | { |
| 176 | memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack)); |
| 177 | } |
| 178 | |
| 179 | extern void inet_csk_delete_keepalive_timer(struct sock *sk); |
| 180 | extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout); |
| 181 | |
| 182 | #ifdef INET_CSK_DEBUG |
| 183 | extern const char inet_csk_timer_bug_msg[]; |
| 184 | #endif |
| 185 | |
| 186 | static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what) |
| 187 | { |
| 188 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 189 | |
| 190 | if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) { |
| 191 | icsk->icsk_pending = 0; |
| 192 | #ifdef INET_CSK_CLEAR_TIMERS |
| 193 | sk_stop_timer(sk, &icsk->icsk_retransmit_timer); |
| 194 | #endif |
| 195 | } else if (what == ICSK_TIME_DACK) { |
| 196 | icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0; |
| 197 | #ifdef INET_CSK_CLEAR_TIMERS |
| 198 | sk_stop_timer(sk, &icsk->icsk_delack_timer); |
| 199 | #endif |
| 200 | } |
| 201 | #ifdef INET_CSK_DEBUG |
| 202 | else { |
Stephen Hemminger | d8971fc | 2005-08-29 22:51:28 -0700 | [diff] [blame] | 203 | pr_debug("%s", inet_csk_timer_bug_msg); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 204 | } |
| 205 | #endif |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * Reset the retransmission timer |
| 210 | */ |
| 211 | static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what, |
| 212 | unsigned long when, |
| 213 | const unsigned long max_when) |
| 214 | { |
| 215 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 216 | |
| 217 | if (when > max_when) { |
| 218 | #ifdef INET_CSK_DEBUG |
| 219 | pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n", |
| 220 | sk, what, when, current_text_addr()); |
| 221 | #endif |
| 222 | when = max_when; |
| 223 | } |
| 224 | |
| 225 | if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) { |
| 226 | icsk->icsk_pending = what; |
| 227 | icsk->icsk_timeout = jiffies + when; |
| 228 | sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); |
| 229 | } else if (what == ICSK_TIME_DACK) { |
| 230 | icsk->icsk_ack.pending |= ICSK_ACK_TIMER; |
| 231 | icsk->icsk_ack.timeout = jiffies + when; |
| 232 | sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout); |
| 233 | } |
| 234 | #ifdef INET_CSK_DEBUG |
| 235 | else { |
Stephen Hemminger | d8971fc | 2005-08-29 22:51:28 -0700 | [diff] [blame] | 236 | pr_debug("%s", inet_csk_timer_bug_msg); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 237 | } |
| 238 | #endif |
| 239 | } |
| 240 | |
| 241 | extern struct sock *inet_csk_accept(struct sock *sk, int flags, int *err); |
| 242 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 243 | extern struct request_sock *inet_csk_search_req(const struct sock *sk, |
| 244 | struct request_sock ***prevp, |
Al Viro | 6b72977 | 2006-09-27 18:36:59 -0700 | [diff] [blame] | 245 | const __be16 rport, |
Al Viro | 7f25afb | 2006-09-27 18:27:47 -0700 | [diff] [blame] | 246 | const __be32 raddr, |
| 247 | const __be32 laddr); |
Arnaldo Carvalho de Melo | 971af18 | 2005-12-13 23:14:47 -0800 | [diff] [blame] | 248 | extern int inet_csk_bind_conflict(const struct sock *sk, |
Alex Copot | aacd928 | 2012-04-12 22:21:45 +0000 | [diff] [blame] | 249 | const struct inet_bind_bucket *tb, bool relax); |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 250 | extern int inet_csk_get_port(struct sock *sk, unsigned short snum); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 251 | |
| 252 | extern struct dst_entry* inet_csk_route_req(struct sock *sk, |
David S. Miller | 6bd023f | 2011-05-18 18:32:03 -0400 | [diff] [blame] | 253 | struct flowi4 *fl4, |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 254 | const struct request_sock *req); |
David S. Miller | 77357a9 | 2011-05-08 14:34:22 -0700 | [diff] [blame] | 255 | extern struct dst_entry* inet_csk_route_child_sock(struct sock *sk, |
| 256 | struct sock *newsk, |
| 257 | const struct request_sock *req); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 258 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 259 | static inline void inet_csk_reqsk_queue_add(struct sock *sk, |
| 260 | struct request_sock *req, |
| 261 | struct sock *child) |
| 262 | { |
| 263 | reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child); |
| 264 | } |
| 265 | |
| 266 | extern void inet_csk_reqsk_queue_hash_add(struct sock *sk, |
| 267 | struct request_sock *req, |
Arnaldo Carvalho de Melo | c2977c2 | 2005-12-13 23:15:12 -0800 | [diff] [blame] | 268 | unsigned long timeout); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 269 | |
| 270 | static inline void inet_csk_reqsk_queue_removed(struct sock *sk, |
| 271 | struct request_sock *req) |
| 272 | { |
| 273 | if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0) |
| 274 | inet_csk_delete_keepalive_timer(sk); |
| 275 | } |
| 276 | |
| 277 | static inline void inet_csk_reqsk_queue_added(struct sock *sk, |
| 278 | const unsigned long timeout) |
| 279 | { |
| 280 | if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0) |
| 281 | inet_csk_reset_keepalive_timer(sk, timeout); |
| 282 | } |
| 283 | |
| 284 | static inline int inet_csk_reqsk_queue_len(const struct sock *sk) |
| 285 | { |
| 286 | return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue); |
| 287 | } |
| 288 | |
| 289 | static inline int inet_csk_reqsk_queue_young(const struct sock *sk) |
| 290 | { |
| 291 | return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue); |
| 292 | } |
| 293 | |
| 294 | static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk) |
| 295 | { |
| 296 | return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue); |
| 297 | } |
| 298 | |
| 299 | static inline void inet_csk_reqsk_queue_unlink(struct sock *sk, |
| 300 | struct request_sock *req, |
| 301 | struct request_sock **prev) |
| 302 | { |
| 303 | reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev); |
| 304 | } |
| 305 | |
| 306 | static inline void inet_csk_reqsk_queue_drop(struct sock *sk, |
| 307 | struct request_sock *req, |
| 308 | struct request_sock **prev) |
| 309 | { |
| 310 | inet_csk_reqsk_queue_unlink(sk, req, prev); |
| 311 | inet_csk_reqsk_queue_removed(sk, req); |
| 312 | reqsk_free(req); |
| 313 | } |
| 314 | |
Arnaldo Carvalho de Melo | a019d6f | 2005-08-09 20:15:09 -0700 | [diff] [blame] | 315 | extern void inet_csk_reqsk_queue_prune(struct sock *parent, |
| 316 | const unsigned long interval, |
| 317 | const unsigned long timeout, |
| 318 | const unsigned long max_rto); |
| 319 | |
| 320 | extern void inet_csk_destroy_sock(struct sock *sk); |
Arnaldo Carvalho de Melo | dc40c7b | 2005-08-23 21:52:58 -0700 | [diff] [blame] | 321 | |
| 322 | /* |
| 323 | * LISTEN is a special case for poll.. |
| 324 | */ |
| 325 | static inline unsigned int inet_csk_listen_poll(const struct sock *sk) |
| 326 | { |
| 327 | return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ? |
| 328 | (POLLIN | POLLRDNORM) : 0; |
| 329 | } |
| 330 | |
Arnaldo Carvalho de Melo | a019d6f | 2005-08-09 20:15:09 -0700 | [diff] [blame] | 331 | extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries); |
Arnaldo Carvalho de Melo | 295f732 | 2005-08-09 20:11:56 -0700 | [diff] [blame] | 332 | extern void inet_csk_listen_stop(struct sock *sk); |
| 333 | |
Arnaldo Carvalho de Melo | af05dc9 | 2005-12-13 23:16:04 -0800 | [diff] [blame] | 334 | extern void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr); |
| 335 | |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 336 | extern int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname, |
| 337 | char __user *optval, int __user *optlen); |
| 338 | extern int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 339 | char __user *optval, unsigned int optlen); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 340 | #endif /* _INET_CONNECTION_SOCK_H */ |