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 { |
Eric Dumazet | b0270e9 | 2014-04-15 12:58:34 -0400 | [diff] [blame] | 39 | int (*queue_xmit)(struct sock *sk, 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); |
Eric Dumazet | 5d299f3 | 2012-08-06 05:09:33 +0000 | [diff] [blame] | 42 | void (*sk_rx_dst_set)(struct sock *sk, const struct sk_buff *skb); |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 43 | int (*conn_request)(struct sock *sk, struct sk_buff *skb); |
Eric Dumazet | 0c27171 | 2015-09-29 07:42:48 -0700 | [diff] [blame] | 44 | struct sock *(*syn_recv_sock)(const struct sock *sk, struct sk_buff *skb, |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 45 | struct request_sock *req, |
Eric Dumazet | 5e0724d | 2015-10-22 08:20:46 -0700 | [diff] [blame] | 46 | struct dst_entry *dst, |
| 47 | struct request_sock *req_unhash, |
| 48 | bool *own_req); |
Arnaldo Carvalho de Melo | 850db6b | 2006-11-27 17:56:43 -0200 | [diff] [blame] | 49 | u16 net_header_len; |
Eric Dumazet | 6746960 | 2012-04-24 07:37:38 +0000 | [diff] [blame] | 50 | u16 net_frag_header_len; |
Arnaldo Carvalho de Melo | 850db6b | 2006-11-27 17:56:43 -0200 | [diff] [blame] | 51 | u16 sockaddr_len; |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 52 | int (*setsockopt)(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 53 | char __user *optval, unsigned int optlen); |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 54 | int (*getsockopt)(struct sock *sk, int level, int optname, |
| 55 | char __user *optval, int __user *optlen); |
Alexey Dobriyan | af01d53 | 2008-08-28 02:53:51 -0700 | [diff] [blame] | 56 | #ifdef CONFIG_COMPAT |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 57 | int (*compat_setsockopt)(struct sock *sk, |
| 58 | int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 59 | char __user *optval, unsigned int optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 60 | int (*compat_getsockopt)(struct sock *sk, |
| 61 | int level, int optname, |
| 62 | char __user *optval, int __user *optlen); |
Alexey Dobriyan | af01d53 | 2008-08-28 02:53:51 -0700 | [diff] [blame] | 63 | #endif |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 64 | void (*addr2sockaddr)(struct sock *sk, struct sockaddr *); |
Neal Cardwell | 4fab907 | 2014-08-14 12:40:05 -0400 | [diff] [blame] | 65 | void (*mtu_reduced)(struct sock *sk); |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 66 | }; |
| 67 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 68 | /** inet_connection_sock - INET connection oriented sock |
| 69 | * |
| 70 | * @icsk_accept_queue: FIFO of established children |
| 71 | * @icsk_bind_hash: Bind node |
| 72 | * @icsk_timeout: Timeout |
| 73 | * @icsk_retransmit_timer: Resend (no ack) |
| 74 | * @icsk_rto: Retransmit timeout |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 75 | * @icsk_pmtu_cookie Last pmtu seen by socket |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 76 | * @icsk_ca_ops Pluggable congestion control hook |
Arnaldo Carvalho de Melo | 8292a17 | 2005-12-13 23:15:52 -0800 | [diff] [blame] | 77 | * @icsk_af_ops Operations which are AF_INET{4,6} specific |
Dave Watson | 734942c | 2017-06-14 11:37:14 -0700 | [diff] [blame] | 78 | * @icsk_ulp_ops Pluggable ULP control hook |
| 79 | * @icsk_ulp_data ULP private data |
Martin KaFai Lau | 61b7c69 | 2017-12-01 12:52:31 -0800 | [diff] [blame] | 80 | * @icsk_listen_portaddr_node hash to the portaddr listener hashtable |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 81 | * @icsk_ca_state: Congestion control state |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 82 | * @icsk_retransmits: Number of unrecovered [RTO] timeouts |
| 83 | * @icsk_pending: Scheduled timer event |
| 84 | * @icsk_backoff: Backoff |
| 85 | * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 86 | * @icsk_probes_out: unanswered 0 window probes |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 87 | * @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options) |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 88 | * @icsk_ack: Delayed ACK control data |
John Heffner | 5d424d5 | 2006-03-20 17:53:41 -0800 | [diff] [blame] | 89 | * @icsk_mtup; MTU probing control data |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 90 | */ |
| 91 | struct inet_connection_sock { |
| 92 | /* inet_sock has to be the first member! */ |
| 93 | struct inet_sock icsk_inet; |
| 94 | struct request_sock_queue icsk_accept_queue; |
| 95 | struct inet_bind_bucket *icsk_bind_hash; |
| 96 | unsigned long icsk_timeout; |
| 97 | struct timer_list icsk_retransmit_timer; |
| 98 | struct timer_list icsk_delack_timer; |
| 99 | __u32 icsk_rto; |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 100 | __u32 icsk_pmtu_cookie; |
Stephen Hemminger | 770cfbc | 2006-01-09 15:56:09 -0800 | [diff] [blame] | 101 | const struct tcp_congestion_ops *icsk_ca_ops; |
| 102 | const struct inet_connection_sock_af_ops *icsk_af_ops; |
Dave Watson | 734942c | 2017-06-14 11:37:14 -0700 | [diff] [blame] | 103 | const struct tcp_ulp_ops *icsk_ulp_ops; |
| 104 | void *icsk_ulp_data; |
Martin KaFai Lau | 61b7c69 | 2017-12-01 12:52:31 -0800 | [diff] [blame] | 105 | struct hlist_node icsk_listen_portaddr_node; |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 106 | unsigned int (*icsk_sync_mss)(struct sock *sk, u32 pmtu); |
Neal Cardwell | 9f95041 | 2015-05-29 13:47:07 -0400 | [diff] [blame] | 107 | __u8 icsk_ca_state:6, |
| 108 | icsk_ca_setsockopt:1, |
Daniel Borkmann | c5c6a8a | 2015-01-05 23:57:46 +0100 | [diff] [blame] | 109 | icsk_ca_dst_locked:1; |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 110 | __u8 icsk_retransmits; |
| 111 | __u8 icsk_pending; |
| 112 | __u8 icsk_backoff; |
| 113 | __u8 icsk_syn_retries; |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 114 | __u8 icsk_probes_out; |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 115 | __u16 icsk_ext_hdr_len; |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 116 | struct { |
| 117 | __u8 pending; /* ACK is pending */ |
| 118 | __u8 quick; /* Scheduled number of quick acks */ |
| 119 | __u8 pingpong; /* The session is interactive */ |
| 120 | __u8 blocked; /* Delayed ACK was blocked by socket lock */ |
| 121 | __u32 ato; /* Predicted tick of soft clock */ |
| 122 | unsigned long timeout; /* Currently scheduled timeout */ |
| 123 | __u32 lrcvtime; /* timestamp of last received data packet */ |
| 124 | __u16 last_seg_size; /* Size of last incoming segment */ |
| 125 | __u16 rcv_mss; /* MSS used for delayed ACK decisions */ |
| 126 | } icsk_ack; |
John Heffner | 5d424d5 | 2006-03-20 17:53:41 -0800 | [diff] [blame] | 127 | struct { |
| 128 | int enabled; |
| 129 | |
| 130 | /* Range of MTUs to search */ |
| 131 | int search_high; |
| 132 | int search_low; |
| 133 | |
| 134 | /* Information on the current probe. */ |
| 135 | int probe_size; |
Fan Du | 05cbc0d | 2015-03-06 11:18:24 +0800 | [diff] [blame] | 136 | |
| 137 | u32 probe_timestamp; |
John Heffner | 5d424d5 | 2006-03-20 17:53:41 -0800 | [diff] [blame] | 138 | } icsk_mtup; |
Jerry Chu | dca43c7 | 2010-08-27 19:13:28 +0000 | [diff] [blame] | 139 | u32 icsk_user_timeout; |
Eric Dumazet | b5d721d | 2015-05-18 17:06:14 -0700 | [diff] [blame] | 140 | |
Neal Cardwell | 7e74417 | 2016-09-19 23:39:22 -0400 | [diff] [blame] | 141 | u64 icsk_ca_priv[88 / sizeof(u64)]; |
| 142 | #define ICSK_CA_PRIV_SIZE (11 * sizeof(u64)) |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 143 | }; |
| 144 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 145 | #define ICSK_TIME_RETRANS 1 /* Retransmit timer */ |
| 146 | #define ICSK_TIME_DACK 2 /* Delayed ack timer */ |
| 147 | #define ICSK_TIME_PROBE0 3 /* Zero window probe timer */ |
Nandita Dukkipati | 6ba8a3b | 2013-03-11 10:00:43 +0000 | [diff] [blame] | 148 | #define ICSK_TIME_EARLY_RETRANS 4 /* Early retransmit timer */ |
| 149 | #define ICSK_TIME_LOSS_PROBE 5 /* Tail loss probe timer */ |
Yuchung Cheng | 57dde7f | 2017-01-12 22:11:33 -0800 | [diff] [blame] | 150 | #define ICSK_TIME_REO_TIMEOUT 6 /* Reordering timer */ |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 151 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 152 | static inline struct inet_connection_sock *inet_csk(const struct sock *sk) |
| 153 | { |
| 154 | return (struct inet_connection_sock *)sk; |
| 155 | } |
| 156 | |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 157 | static inline void *inet_csk_ca(const struct sock *sk) |
| 158 | { |
| 159 | return (void *)inet_csk(sk)->icsk_ca_priv; |
| 160 | } |
| 161 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 162 | struct sock *inet_csk_clone_lock(const struct sock *sk, |
| 163 | const struct request_sock *req, |
| 164 | const gfp_t priority); |
Arnaldo Carvalho de Melo | 9f1d260 | 2005-08-09 20:11:24 -0700 | [diff] [blame] | 165 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 166 | enum inet_csk_ack_state_t { |
| 167 | ICSK_ACK_SCHED = 1, |
| 168 | ICSK_ACK_TIMER = 2, |
Alexey Kuznetsov | 1ef9696 | 2006-09-19 12:52:50 -0700 | [diff] [blame] | 169 | ICSK_ACK_PUSHED = 4, |
| 170 | ICSK_ACK_PUSHED2 = 8 |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 171 | }; |
| 172 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 173 | void inet_csk_init_xmit_timers(struct sock *sk, |
Kees Cook | 59f379f | 2017-10-16 17:29:19 -0700 | [diff] [blame] | 174 | void (*retransmit_handler)(struct timer_list *), |
| 175 | void (*delack_handler)(struct timer_list *), |
| 176 | void (*keepalive_handler)(struct timer_list *)); |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 177 | void inet_csk_clear_xmit_timers(struct sock *sk); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 178 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 179 | static inline void inet_csk_schedule_ack(struct sock *sk) |
| 180 | { |
| 181 | inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED; |
| 182 | } |
| 183 | |
| 184 | static inline int inet_csk_ack_scheduled(const struct sock *sk) |
| 185 | { |
| 186 | return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED; |
| 187 | } |
| 188 | |
| 189 | static inline void inet_csk_delack_init(struct sock *sk) |
| 190 | { |
| 191 | memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack)); |
| 192 | } |
| 193 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 194 | void inet_csk_delete_keepalive_timer(struct sock *sk); |
| 195 | void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 196 | |
| 197 | #ifdef INET_CSK_DEBUG |
| 198 | extern const char inet_csk_timer_bug_msg[]; |
| 199 | #endif |
| 200 | |
| 201 | static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what) |
| 202 | { |
| 203 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 204 | |
| 205 | if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) { |
| 206 | icsk->icsk_pending = 0; |
| 207 | #ifdef INET_CSK_CLEAR_TIMERS |
| 208 | sk_stop_timer(sk, &icsk->icsk_retransmit_timer); |
| 209 | #endif |
| 210 | } else if (what == ICSK_TIME_DACK) { |
| 211 | icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0; |
| 212 | #ifdef INET_CSK_CLEAR_TIMERS |
| 213 | sk_stop_timer(sk, &icsk->icsk_delack_timer); |
| 214 | #endif |
| 215 | } |
| 216 | #ifdef INET_CSK_DEBUG |
| 217 | else { |
Stephen Hemminger | d8971fc | 2005-08-29 22:51:28 -0700 | [diff] [blame] | 218 | pr_debug("%s", inet_csk_timer_bug_msg); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 219 | } |
| 220 | #endif |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Reset the retransmission timer |
| 225 | */ |
| 226 | static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what, |
| 227 | unsigned long when, |
| 228 | const unsigned long max_when) |
| 229 | { |
| 230 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 231 | |
| 232 | if (when > max_when) { |
| 233 | #ifdef INET_CSK_DEBUG |
| 234 | pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n", |
| 235 | sk, what, when, current_text_addr()); |
| 236 | #endif |
| 237 | when = max_when; |
| 238 | } |
| 239 | |
Nandita Dukkipati | 6ba8a3b | 2013-03-11 10:00:43 +0000 | [diff] [blame] | 240 | if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0 || |
Yuchung Cheng | 57dde7f | 2017-01-12 22:11:33 -0800 | [diff] [blame] | 241 | what == ICSK_TIME_EARLY_RETRANS || what == ICSK_TIME_LOSS_PROBE || |
| 242 | what == ICSK_TIME_REO_TIMEOUT) { |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 243 | icsk->icsk_pending = what; |
| 244 | icsk->icsk_timeout = jiffies + when; |
| 245 | sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); |
| 246 | } else if (what == ICSK_TIME_DACK) { |
| 247 | icsk->icsk_ack.pending |= ICSK_ACK_TIMER; |
| 248 | icsk->icsk_ack.timeout = jiffies + when; |
| 249 | sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout); |
| 250 | } |
| 251 | #ifdef INET_CSK_DEBUG |
| 252 | else { |
Stephen Hemminger | d8971fc | 2005-08-29 22:51:28 -0700 | [diff] [blame] | 253 | pr_debug("%s", inet_csk_timer_bug_msg); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 254 | } |
| 255 | #endif |
| 256 | } |
| 257 | |
Eric Dumazet | fcdd1cf | 2014-09-22 13:19:44 -0700 | [diff] [blame] | 258 | static inline unsigned long |
| 259 | inet_csk_rto_backoff(const struct inet_connection_sock *icsk, |
| 260 | unsigned long max_when) |
| 261 | { |
| 262 | u64 when = (u64)icsk->icsk_rto << icsk->icsk_backoff; |
| 263 | |
| 264 | return (unsigned long)min_t(u64, when, max_when); |
| 265 | } |
| 266 | |
David Howells | cdfbabf | 2017-03-09 08:09:05 +0000 | [diff] [blame] | 267 | struct sock *inet_csk_accept(struct sock *sk, int flags, int *err, bool kern); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 268 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 269 | 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] | 270 | |
Eric Dumazet | e5895bc | 2015-09-25 07:39:11 -0700 | [diff] [blame] | 271 | struct dst_entry *inet_csk_route_req(const struct sock *sk, struct flowi4 *fl4, |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 272 | const struct request_sock *req); |
Eric Dumazet | a2432c4 | 2015-09-29 07:42:43 -0700 | [diff] [blame] | 273 | struct dst_entry *inet_csk_route_child_sock(const struct sock *sk, |
| 274 | struct sock *newsk, |
David S. Miller | ba3f7f0 | 2012-07-17 14:02:46 -0700 | [diff] [blame] | 275 | const struct request_sock *req); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 276 | |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 277 | struct sock *inet_csk_reqsk_queue_add(struct sock *sk, |
| 278 | struct request_sock *req, |
| 279 | struct sock *child); |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 280 | void inet_csk_reqsk_queue_hash_add(struct sock *sk, struct request_sock *req, |
| 281 | unsigned long timeout); |
Eric Dumazet | 5e0724d | 2015-10-22 08:20:46 -0700 | [diff] [blame] | 282 | struct sock *inet_csk_complete_hashdance(struct sock *sk, struct sock *child, |
| 283 | struct request_sock *req, |
| 284 | bool own_req); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 285 | |
Eric Dumazet | 2feda34 | 2015-10-02 11:43:31 -0700 | [diff] [blame] | 286 | static inline void inet_csk_reqsk_queue_added(struct sock *sk) |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 287 | { |
Eric Dumazet | fa76ce73 | 2015-03-19 19:04:20 -0700 | [diff] [blame] | 288 | reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | static inline int inet_csk_reqsk_queue_len(const struct sock *sk) |
| 292 | { |
| 293 | return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue); |
| 294 | } |
| 295 | |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 296 | static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk) |
| 297 | { |
Eric Dumazet | ef547f2 | 2015-10-02 11:43:37 -0700 | [diff] [blame] | 298 | return inet_csk_reqsk_queue_len(sk) >= sk->sk_max_ack_backlog; |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Eric Dumazet | b357a36 | 2015-04-23 18:03:44 -0700 | [diff] [blame] | 301 | void inet_csk_reqsk_queue_drop(struct sock *sk, struct request_sock *req); |
Eric Dumazet | f03f2e1 | 2015-10-14 11:16:27 -0700 | [diff] [blame] | 302 | void inet_csk_reqsk_queue_drop_and_put(struct sock *sk, struct request_sock *req); |
Arnaldo Carvalho de Melo | 3f421ba | 2005-08-09 20:11:08 -0700 | [diff] [blame] | 303 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 304 | void inet_csk_destroy_sock(struct sock *sk); |
| 305 | void inet_csk_prepare_forced_close(struct sock *sk); |
Arnaldo Carvalho de Melo | dc40c7b | 2005-08-23 21:52:58 -0700 | [diff] [blame] | 306 | |
| 307 | /* |
| 308 | * LISTEN is a special case for poll.. |
| 309 | */ |
Al Viro | ade994f | 2017-07-03 00:01:49 -0400 | [diff] [blame] | 310 | static inline __poll_t inet_csk_listen_poll(const struct sock *sk) |
Arnaldo Carvalho de Melo | dc40c7b | 2005-08-23 21:52:58 -0700 | [diff] [blame] | 311 | { |
| 312 | return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ? |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame^] | 313 | (EPOLLIN | EPOLLRDNORM) : 0; |
Arnaldo Carvalho de Melo | dc40c7b | 2005-08-23 21:52:58 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Eric Dumazet | f985c65 | 2015-10-14 06:16:49 -0700 | [diff] [blame] | 316 | int inet_csk_listen_start(struct sock *sk, int backlog); |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 317 | void inet_csk_listen_stop(struct sock *sk); |
Arnaldo Carvalho de Melo | 295f732 | 2005-08-09 20:11:56 -0700 | [diff] [blame] | 318 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 319 | void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr); |
Arnaldo Carvalho de Melo | af05dc9 | 2005-12-13 23:16:04 -0800 | [diff] [blame] | 320 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 321 | int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname, |
| 322 | char __user *optval, int __user *optlen); |
| 323 | int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname, |
| 324 | char __user *optval, unsigned int optlen); |
David S. Miller | 80d0a69 | 2012-07-16 03:28:06 -0700 | [diff] [blame] | 325 | |
Joe Perches | 1fd5115 | 2013-09-21 10:22:41 -0700 | [diff] [blame] | 326 | struct dst_entry *inet_csk_update_pmtu(struct sock *sk, u32 mtu); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 327 | #endif /* _INET_CONNECTION_SOCK_H */ |