^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * INET An implementation of the TCP/IP protocol suite for the LINUX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * operating system. INET is implemented using the BSD Socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * interface as the means of communication with the user level.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Definitions for a generic INET TIMEWAIT sock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * From code originally in net/tcp.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #ifndef _INET_TIMEWAIT_SOCK_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define _INET_TIMEWAIT_SOCK_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <net/inet_sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <net/tcp_states.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <net/timewait_sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct inet_bind_bucket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * This is a TIME_WAIT sock. It works around the memory consumption
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * problems of sockets in such a state on heavily loaded servers, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * without violating the protocol specification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct inet_timewait_sock {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Now struct sock also uses sock_common, so please just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * don't add nothing before this first member (__tw_common) --acme
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct sock_common __tw_common;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define tw_family __tw_common.skc_family
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define tw_state __tw_common.skc_state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define tw_reuse __tw_common.skc_reuse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define tw_reuseport __tw_common.skc_reuseport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define tw_ipv6only __tw_common.skc_ipv6only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define tw_bound_dev_if __tw_common.skc_bound_dev_if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define tw_node __tw_common.skc_nulls_node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define tw_bind_node __tw_common.skc_bind_node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define tw_refcnt __tw_common.skc_refcnt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define tw_hash __tw_common.skc_hash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define tw_prot __tw_common.skc_prot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define tw_net __tw_common.skc_net
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define tw_daddr __tw_common.skc_daddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define tw_v6_daddr __tw_common.skc_v6_daddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define tw_rcv_saddr __tw_common.skc_rcv_saddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define tw_v6_rcv_saddr __tw_common.skc_v6_rcv_saddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define tw_dport __tw_common.skc_dport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define tw_num __tw_common.skc_num
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define tw_cookie __tw_common.skc_cookie
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define tw_dr __tw_common.skc_tw_dr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) __u32 tw_mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) volatile unsigned char tw_substate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) unsigned char tw_rcv_wscale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* Socket demultiplex comparisons on incoming packets. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* these three are in inet_sock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) __be16 tw_sport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* And these are ours. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) unsigned int tw_kill : 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) tw_transparent : 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) tw_flowlabel : 20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) tw_pad : 2, /* 2 bits hole */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) tw_tos : 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) u32 tw_txhash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u32 tw_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct timer_list tw_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct inet_bind_bucket *tw_tb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define tw_tclass tw_tos
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return (struct inet_timewait_sock *)sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) void inet_twsk_free(struct inet_timewait_sock *tw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void inet_twsk_put(struct inet_timewait_sock *tw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) void inet_twsk_bind_unhash(struct inet_timewait_sock *tw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct inet_hashinfo *hashinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct inet_timewait_death_row *dr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) const int state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) void inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct inet_hashinfo *hashinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) bool rearm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static inline void inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) __inet_twsk_schedule(tw, timeo, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static inline void inet_twsk_reschedule(struct inet_timewait_sock *tw, int timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) __inet_twsk_schedule(tw, timeo, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) void inet_twsk_deschedule_put(struct inet_timewait_sock *tw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct net *twsk_net(const struct inet_timewait_sock *twsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return read_pnet(&twsk->tw_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) write_pnet(&twsk->tw_net, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #endif /* _INET_TIMEWAIT_SOCK_ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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