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-rw-r--r--include/net/inet_connection_sock.h86
-rw-r--r--include/net/inet_hashtables.h6
-rw-r--r--include/net/request_sock.h6
-rw-r--r--include/net/sock.h3
-rw-r--r--include/net/tcp.h222
-rw-r--r--include/net/tcp_ecn.h2
6 files changed, 204 insertions, 121 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
new file mode 100644
index 000000000000..ef609396e41b
--- /dev/null
+++ b/include/net/inet_connection_sock.h
@@ -0,0 +1,86 @@
+/*
+ * NET Generic infrastructure for INET connection oriented protocols.
+ *
+ * Definitions for inet_connection_sock
+ *
+ * Authors: Many people, see the TCP sources
+ *
+ * From code originally in TCP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _INET_CONNECTION_SOCK_H
+#define _INET_CONNECTION_SOCK_H
+
+#include <linux/ip.h>
+#include <linux/timer.h>
+#include <net/request_sock.h>
+
+struct inet_bind_bucket;
+struct inet_hashinfo;
+
+/** inet_connection_sock - INET connection oriented sock
+ *
+ * @icsk_accept_queue: FIFO of established children
+ * @icsk_bind_hash: Bind node
+ * @icsk_timeout: Timeout
+ * @icsk_retransmit_timer: Resend (no ack)
+ * @icsk_rto: Retransmit timeout
+ * @icsk_retransmits: Number of unrecovered [RTO] timeouts
+ * @icsk_pending: Scheduled timer event
+ * @icsk_backoff: Backoff
+ * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
+ * @icsk_ack: Delayed ACK control data
+ */
+struct inet_connection_sock {
+ /* inet_sock has to be the first member! */
+ struct inet_sock icsk_inet;
+ struct request_sock_queue icsk_accept_queue;
+ struct inet_bind_bucket *icsk_bind_hash;
+ unsigned long icsk_timeout;
+ struct timer_list icsk_retransmit_timer;
+ struct timer_list icsk_delack_timer;
+ __u32 icsk_rto;
+ __u8 icsk_retransmits;
+ __u8 icsk_pending;
+ __u8 icsk_backoff;
+ __u8 icsk_syn_retries;
+ struct {
+ __u8 pending; /* ACK is pending */
+ __u8 quick; /* Scheduled number of quick acks */
+ __u8 pingpong; /* The session is interactive */
+ __u8 blocked; /* Delayed ACK was blocked by socket lock */
+ __u32 ato; /* Predicted tick of soft clock */
+ unsigned long timeout; /* Currently scheduled timeout */
+ __u32 lrcvtime; /* timestamp of last received data packet */
+ __u16 last_seg_size; /* Size of last incoming segment */
+ __u16 rcv_mss; /* MSS used for delayed ACK decisions */
+ } icsk_ack;
+};
+
+static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
+{
+ return (struct inet_connection_sock *)sk;
+}
+
+extern void inet_csk_init_xmit_timers(struct sock *sk,
+ void (*retransmit_handler)(unsigned long),
+ void (*delack_handler)(unsigned long),
+ void (*keepalive_handler)(unsigned long));
+extern void inet_csk_clear_xmit_timers(struct sock *sk);
+
+extern struct request_sock *inet_csk_search_req(const struct sock *sk,
+ struct request_sock ***prevp,
+ const __u16 rport,
+ const __u32 raddr,
+ const __u32 laddr);
+extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
+ struct sock *sk, unsigned short snum);
+
+extern struct dst_entry* inet_csk_route_req(struct sock *sk,
+ const struct request_sock *req);
+
+#endif /* _INET_CONNECTION_SOCK_H */
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index b5c0d64ea741..f0c21c07f894 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -17,7 +17,6 @@
#include <linux/config.h>
#include <linux/interrupt.h>
-#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/list.h>
#include <linux/slab.h>
@@ -26,6 +25,7 @@
#include <linux/types.h>
#include <linux/wait.h>
+#include <net/inet_connection_sock.h>
#include <net/sock.h>
#include <net/tcp_states.h>
@@ -185,9 +185,9 @@ static inline void __inet_inherit_port(struct inet_hashinfo *table,
struct inet_bind_bucket *tb;
spin_lock(&head->lock);
- tb = inet_sk(sk)->bind_hash;
+ tb = inet_csk(sk)->icsk_bind_hash;
sk_add_bind_node(child, &tb->owners);
- inet_sk(child)->bind_hash = tb;
+ inet_csk(child)->icsk_bind_hash = tb;
spin_unlock(&head->lock);
}
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 334717bf9ef6..b7c7eecbe64d 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -224,17 +224,17 @@ static inline int reqsk_queue_added(struct request_sock_queue *queue)
return prev_qlen;
}
-static inline int reqsk_queue_len(struct request_sock_queue *queue)
+static inline int reqsk_queue_len(const struct request_sock_queue *queue)
{
return queue->listen_opt != NULL ? queue->listen_opt->qlen : 0;
}
-static inline int reqsk_queue_len_young(struct request_sock_queue *queue)
+static inline int reqsk_queue_len_young(const struct request_sock_queue *queue)
{
return queue->listen_opt->qlen_young;
}
-static inline int reqsk_queue_is_full(struct request_sock_queue *queue)
+static inline int reqsk_queue_is_full(const struct request_sock_queue *queue)
{
return queue->listen_opt->qlen >> queue->listen_opt->max_qlen_log;
}
diff --git a/include/net/sock.h b/include/net/sock.h
index 828dc082fcb7..48cc337a6566 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -493,9 +493,6 @@ extern int sk_wait_data(struct sock *sk, long *timeo);
struct request_sock_ops;
-/* Here is the right place to enable sock refcounting debugging */
-//#define SOCK_REFCNT_DEBUG
-
/* Networking protocol blocks we attach to sockets.
* socket layer -> transport layer interface
* transport -> network interface is defined by struct inet_proto
diff --git a/include/net/tcp.h b/include/net/tcp.h
index cf8e664176ad..a943c79c88b0 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -19,10 +19,11 @@
#define _TCP_H
#define TCP_DEBUG 1
+#define INET_CSK_DEBUG 1
#define FASTRETRANS_DEBUG 1
/* Cancel timers, when they are not required. */
-#undef TCP_CLEAR_TIMERS
+#undef INET_CSK_CLEAR_TIMERS
#include <linux/config.h>
#include <linux/list.h>
@@ -205,10 +206,10 @@ extern void tcp_tw_deschedule(struct inet_timewait_sock *tw);
#define TCPOLEN_SACK_BASE_ALIGNED 4
#define TCPOLEN_SACK_PERBLOCK 8
-#define TCP_TIME_RETRANS 1 /* Retransmit timer */
-#define TCP_TIME_DACK 2 /* Delayed ack timer */
-#define TCP_TIME_PROBE0 3 /* Zero window probe timer */
-#define TCP_TIME_KEEPOPEN 4 /* Keepalive timer */
+#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
+#define ICSK_TIME_DACK 2 /* Delayed ack timer */
+#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */
+#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */
/* Flags in tp->nonagle */
#define TCP_NAGLE_OFF 1 /* Nagle's algo is disabled */
@@ -257,9 +258,9 @@ extern atomic_t tcp_sockets_allocated;
extern int tcp_memory_pressure;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-#define TCP_INET_FAMILY(fam) ((fam) == AF_INET)
+#define AF_INET_FAMILY(fam) ((fam) == AF_INET)
#else
-#define TCP_INET_FAMILY(fam) 1
+#define AF_INET_FAMILY(fam) 1
#endif
/*
@@ -372,41 +373,42 @@ extern int tcp_rcv_established(struct sock *sk,
extern void tcp_rcv_space_adjust(struct sock *sk);
-enum tcp_ack_state_t
-{
- TCP_ACK_SCHED = 1,
- TCP_ACK_TIMER = 2,
- TCP_ACK_PUSHED= 4
+enum inet_csk_ack_state_t {
+ ICSK_ACK_SCHED = 1,
+ ICSK_ACK_TIMER = 2,
+ ICSK_ACK_PUSHED = 4
};
-static inline void tcp_schedule_ack(struct tcp_sock *tp)
+static inline void inet_csk_schedule_ack(struct sock *sk)
{
- tp->ack.pending |= TCP_ACK_SCHED;
+ inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED;
}
-static inline int tcp_ack_scheduled(struct tcp_sock *tp)
+static inline int inet_csk_ack_scheduled(const struct sock *sk)
{
- return tp->ack.pending&TCP_ACK_SCHED;
+ return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
}
-static __inline__ void tcp_dec_quickack_mode(struct tcp_sock *tp, unsigned int pkts)
+static inline void tcp_dec_quickack_mode(struct sock *sk,
+ const unsigned int pkts)
{
- if (tp->ack.quick) {
- if (pkts >= tp->ack.quick) {
- tp->ack.quick = 0;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ if (icsk->icsk_ack.quick) {
+ if (pkts >= icsk->icsk_ack.quick) {
+ icsk->icsk_ack.quick = 0;
/* Leaving quickack mode we deflate ATO. */
- tp->ack.ato = TCP_ATO_MIN;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
} else
- tp->ack.quick -= pkts;
+ icsk->icsk_ack.quick -= pkts;
}
}
-extern void tcp_enter_quickack_mode(struct tcp_sock *tp);
+extern void tcp_enter_quickack_mode(struct sock *sk);
-static __inline__ void tcp_delack_init(struct tcp_sock *tp)
+static inline void inet_csk_delack_init(struct sock *sk)
{
- memset(&tp->ack, 0, sizeof(tp->ack));
+ memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
}
static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
@@ -440,7 +442,7 @@ extern void tcp_update_metrics(struct sock *sk);
extern void tcp_close(struct sock *sk,
long timeout);
-extern struct sock * tcp_accept(struct sock *sk, int flags, int *err);
+extern struct sock * inet_csk_accept(struct sock *sk, int flags, int *err);
extern unsigned int tcp_poll(struct file * file, struct socket *sock, struct poll_table_struct *wait);
extern int tcp_getsockopt(struct sock *sk, int level,
@@ -534,15 +536,18 @@ extern void tcp_cwnd_application_limited(struct sock *sk);
/* tcp_timer.c */
extern void tcp_init_xmit_timers(struct sock *);
-extern void tcp_clear_xmit_timers(struct sock *);
+static inline void tcp_clear_xmit_timers(struct sock *sk)
+{
+ inet_csk_clear_xmit_timers(sk);
+}
-extern void tcp_delete_keepalive_timer(struct sock *);
-extern void tcp_reset_keepalive_timer(struct sock *, unsigned long);
+extern void inet_csk_delete_keepalive_timer(struct sock *sk);
+extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);
extern unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
extern unsigned int tcp_current_mss(struct sock *sk, int large);
-#ifdef TCP_DEBUG
-extern const char tcp_timer_bug_msg[];
+#ifdef INET_CSK_DEBUG
+extern const char inet_csk_timer_bug_msg[];
#endif
/* tcp_diag.c */
@@ -554,70 +559,58 @@ typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
extern int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
sk_read_actor_t recv_actor);
-static inline void tcp_clear_xmit_timer(struct sock *sk, int what)
+static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
{
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
- switch (what) {
- case TCP_TIME_RETRANS:
- case TCP_TIME_PROBE0:
- tp->pending = 0;
-
-#ifdef TCP_CLEAR_TIMERS
- sk_stop_timer(sk, &tp->retransmit_timer);
+ if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
+ icsk->icsk_pending = 0;
+#ifdef INET_CSK_CLEAR_TIMERS
+ sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
#endif
- break;
- case TCP_TIME_DACK:
- tp->ack.blocked = 0;
- tp->ack.pending = 0;
-
-#ifdef TCP_CLEAR_TIMERS
- sk_stop_timer(sk, &tp->delack_timer);
+ } else if (what == ICSK_TIME_DACK) {
+ icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
+#ifdef INET_CSK_CLEAR_TIMERS
+ sk_stop_timer(sk, &icsk->icsk_delack_timer);
#endif
- break;
- default:
-#ifdef TCP_DEBUG
- printk(tcp_timer_bug_msg);
+ }
+#ifdef INET_CSK_DEBUG
+ else {
+ pr_debug(inet_csk_timer_bug_msg);
+ }
#endif
- return;
- };
-
}
/*
* Reset the retransmission timer
*/
-static inline void tcp_reset_xmit_timer(struct sock *sk, int what, unsigned long when)
+static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
+ unsigned long when)
{
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
if (when > TCP_RTO_MAX) {
-#ifdef TCP_DEBUG
- printk(KERN_DEBUG "reset_xmit_timer sk=%p %d when=0x%lx, caller=%p\n", sk, what, when, current_text_addr());
+#ifdef INET_CSK_DEBUG
+ pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
+ sk, what, when, current_text_addr());
#endif
when = TCP_RTO_MAX;
}
- switch (what) {
- case TCP_TIME_RETRANS:
- case TCP_TIME_PROBE0:
- tp->pending = what;
- tp->timeout = jiffies+when;
- sk_reset_timer(sk, &tp->retransmit_timer, tp->timeout);
- break;
-
- case TCP_TIME_DACK:
- tp->ack.pending |= TCP_ACK_TIMER;
- tp->ack.timeout = jiffies+when;
- sk_reset_timer(sk, &tp->delack_timer, tp->ack.timeout);
- break;
-
- default:
-#ifdef TCP_DEBUG
- printk(tcp_timer_bug_msg);
+ if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
+ icsk->icsk_pending = what;
+ icsk->icsk_timeout = jiffies + when;
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
+ } else if (what == ICSK_TIME_DACK) {
+ icsk->icsk_ack.pending |= ICSK_ACK_TIMER;
+ icsk->icsk_ack.timeout = jiffies + when;
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
+ }
+#ifdef INET_CSK_DEBUG
+ else {
+ pr_debug(inet_csk_timer_bug_msg);
+ }
#endif
- return;
- };
}
/* Initialize RCV_MSS value.
@@ -637,7 +630,7 @@ static inline void tcp_initialize_rcv_mss(struct sock *sk)
hint = min(hint, TCP_MIN_RCVMSS);
hint = max(hint, TCP_MIN_MSS);
- tp->ack.rcv_mss = hint;
+ inet_csk(sk)->icsk_ack.rcv_mss = hint;
}
static __inline__ void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd)
@@ -772,7 +765,7 @@ static inline void tcp_packets_out_inc(struct sock *sk,
tp->packets_out += tcp_skb_pcount(skb);
if (!orig)
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, inet_csk(sk)->icsk_rto);
}
static inline void tcp_packets_out_dec(struct tcp_sock *tp,
@@ -939,8 +932,9 @@ static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss,
static __inline__ void tcp_check_probe_timer(struct sock *sk, struct tcp_sock *tp)
{
- if (!tp->packets_out && !tp->pending)
- tcp_reset_xmit_timer(sk, TCP_TIME_PROBE0, tp->rto);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ if (!tp->packets_out && !icsk->icsk_pending)
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0, icsk->icsk_rto);
}
static __inline__ void tcp_push_pending_frames(struct sock *sk,
@@ -1021,8 +1015,9 @@ static __inline__ int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
tp->ucopy.memory = 0;
} else if (skb_queue_len(&tp->ucopy.prequeue) == 1) {
wake_up_interruptible(sk->sk_sleep);
- if (!tcp_ack_scheduled(tp))
- tcp_reset_xmit_timer(sk, TCP_TIME_DACK, (3*TCP_RTO_MIN)/4);
+ if (!inet_csk_ack_scheduled(sk))
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ (3 * TCP_RTO_MIN) / 4);
}
return 1;
}
@@ -1055,7 +1050,7 @@ static __inline__ void tcp_set_state(struct sock *sk, int state)
TCP_INC_STATS(TCP_MIB_ESTABRESETS);
sk->sk_prot->unhash(sk);
- if (inet_sk(sk)->bind_hash &&
+ if (inet_csk(sk)->icsk_bind_hash &&
!(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
inet_put_port(&tcp_hashinfo, sk);
/* fall through */
@@ -1186,51 +1181,55 @@ static inline int tcp_full_space(const struct sock *sk)
return tcp_win_from_space(sk->sk_rcvbuf);
}
-static inline void tcp_acceptq_queue(struct sock *sk, struct request_sock *req,
- struct sock *child)
+static inline void inet_csk_reqsk_queue_add(struct sock *sk,
+ struct request_sock *req,
+ struct sock *child)
{
- reqsk_queue_add(&tcp_sk(sk)->accept_queue, req, sk, child);
+ reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
}
-static inline void
-tcp_synq_removed(struct sock *sk, struct request_sock *req)
+static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
+ struct request_sock *req)
{
- if (reqsk_queue_removed(&tcp_sk(sk)->accept_queue, req) == 0)
- tcp_delete_keepalive_timer(sk);
+ if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
+ inet_csk_delete_keepalive_timer(sk);
}
-static inline void tcp_synq_added(struct sock *sk)
+static inline void inet_csk_reqsk_queue_added(struct sock *sk,
+ const unsigned long timeout)
{
- if (reqsk_queue_added(&tcp_sk(sk)->accept_queue) == 0)
- tcp_reset_keepalive_timer(sk, TCP_TIMEOUT_INIT);
+ if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
+ inet_csk_reset_keepalive_timer(sk, timeout);
}
-static inline int tcp_synq_len(struct sock *sk)
+static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
{
- return reqsk_queue_len(&tcp_sk(sk)->accept_queue);
+ return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
}
-static inline int tcp_synq_young(struct sock *sk)
+static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
{
- return reqsk_queue_len_young(&tcp_sk(sk)->accept_queue);
+ return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
}
-static inline int tcp_synq_is_full(struct sock *sk)
+static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
{
- return reqsk_queue_is_full(&tcp_sk(sk)->accept_queue);
+ return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
}
-static inline void tcp_synq_unlink(struct tcp_sock *tp, struct request_sock *req,
- struct request_sock **prev)
+static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
+ struct request_sock *req,
+ struct request_sock **prev)
{
- reqsk_queue_unlink(&tp->accept_queue, req, prev);
+ reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
}
-static inline void tcp_synq_drop(struct sock *sk, struct request_sock *req,
- struct request_sock **prev)
+static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
+ struct request_sock *req,
+ struct request_sock **prev)
{
- tcp_synq_unlink(tcp_sk(sk), req, prev);
- tcp_synq_removed(sk, req);
+ inet_csk_reqsk_queue_unlink(sk, req, prev);
+ inet_csk_reqsk_queue_removed(sk, req);
reqsk_free(req);
}
@@ -1265,12 +1264,13 @@ static inline int keepalive_time_when(const struct tcp_sock *tp)
return tp->keepalive_time ? : sysctl_tcp_keepalive_time;
}
-static inline int tcp_fin_time(const struct tcp_sock *tp)
+static inline int tcp_fin_time(const struct sock *sk)
{
- int fin_timeout = tp->linger2 ? : sysctl_tcp_fin_timeout;
+ int fin_timeout = tcp_sk(sk)->linger2 ? : sysctl_tcp_fin_timeout;
+ const int rto = inet_csk(sk)->icsk_rto;
- if (fin_timeout < (tp->rto<<2) - (tp->rto>>1))
- fin_timeout = (tp->rto<<2) - (tp->rto>>1);
+ if (fin_timeout < (rto << 2) - (rto >> 1))
+ fin_timeout = (rto << 2) - (rto >> 1);
return fin_timeout;
}
diff --git a/include/net/tcp_ecn.h b/include/net/tcp_ecn.h
index 64980ee8c92a..c6b84397448d 100644
--- a/include/net/tcp_ecn.h
+++ b/include/net/tcp_ecn.h
@@ -88,7 +88,7 @@ static inline void TCP_ECN_check_ce(struct tcp_sock *tp, struct sk_buff *skb)
* it is surely retransmit. It is not in ECN RFC,
* but Linux follows this rule. */
else if (INET_ECN_is_not_ect((TCP_SKB_CB(skb)->flags)))
- tcp_enter_quickack_mode(tp);
+ tcp_enter_quickack_mode((struct sock *)tp);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 15:45:18 +0100