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Diffstat (limited to 'net/can')
-rw-r--r--net/can/af_can.c2
-rw-r--r--net/can/bcm.c69
-rw-r--r--net/can/isotp.c5
-rw-r--r--net/can/j1939/j1939-priv.h3
-rw-r--r--net/can/j1939/main.c2
-rw-r--r--net/can/j1939/socket.c46
-rw-r--r--net/can/raw.c93
7 files changed, 180 insertions, 40 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 7343fd487dbe..707576eeeb58 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -865,6 +865,8 @@ static __init int can_init(void)
/* check for correct padding to be able to use the structs similarly */
BUILD_BUG_ON(offsetof(struct can_frame, len) !=
offsetof(struct canfd_frame, len) ||
+ offsetof(struct can_frame, len) !=
+ offsetof(struct canxl_frame, flags) ||
offsetof(struct can_frame, data) !=
offsetof(struct canfd_frame, data));
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 9168114fc87f..27d5fcf0eac9 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -72,9 +72,11 @@
#define BCM_TIMER_SEC_MAX (400 * 24 * 60 * 60)
/* use of last_frames[index].flags */
+#define RX_LOCAL 0x10 /* frame was created on the local host */
+#define RX_OWN 0x20 /* frame was sent via the socket it was received on */
#define RX_RECV 0x40 /* received data for this element */
#define RX_THR 0x80 /* element not been sent due to throttle feature */
-#define BCM_CAN_FLAGS_MASK 0x3F /* to clean private flags after usage */
+#define BCM_CAN_FLAGS_MASK 0x0F /* to clean private flags after usage */
/* get best masking value for can_rx_register() for a given single can_id */
#define REGMASK(id) ((id & CAN_EFF_FLAG) ? \
@@ -138,6 +140,16 @@ static LIST_HEAD(bcm_notifier_list);
static DEFINE_SPINLOCK(bcm_notifier_lock);
static struct bcm_sock *bcm_busy_notifier;
+/* Return pointer to store the extra msg flags for bcm_recvmsg().
+ * We use the space of one unsigned int beyond the 'struct sockaddr_can'
+ * in skb->cb.
+ */
+static inline unsigned int *bcm_flags(struct sk_buff *skb)
+{
+ /* return pointer after struct sockaddr_can */
+ return (unsigned int *)(&((struct sockaddr_can *)skb->cb)[1]);
+}
+
static inline struct bcm_sock *bcm_sk(const struct sock *sk)
{
return (struct bcm_sock *)sk;
@@ -325,6 +337,7 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
struct sock *sk = op->sk;
unsigned int datalen = head->nframes * op->cfsiz;
int err;
+ unsigned int *pflags;
skb = alloc_skb(sizeof(*head) + datalen, gfp_any());
if (!skb)
@@ -332,6 +345,14 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
skb_put_data(skb, head, sizeof(*head));
+ /* ensure space for sockaddr_can and msg flags */
+ sock_skb_cb_check_size(sizeof(struct sockaddr_can) +
+ sizeof(unsigned int));
+
+ /* initialize msg flags */
+ pflags = bcm_flags(skb);
+ *pflags = 0;
+
if (head->nframes) {
/* CAN frames starting here */
firstframe = (struct canfd_frame *)skb_tail_pointer(skb);
@@ -344,8 +365,14 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
* relevant for updates that are generated by the
* BCM, where nframes is 1
*/
- if (head->nframes == 1)
+ if (head->nframes == 1) {
+ if (firstframe->flags & RX_LOCAL)
+ *pflags |= MSG_DONTROUTE;
+ if (firstframe->flags & RX_OWN)
+ *pflags |= MSG_CONFIRM;
+
firstframe->flags &= BCM_CAN_FLAGS_MASK;
+ }
}
if (has_timestamp) {
@@ -360,7 +387,6 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
* containing the interface index.
*/
- sock_skb_cb_check_size(sizeof(struct sockaddr_can));
addr = (struct sockaddr_can *)skb->cb;
memset(addr, 0, sizeof(*addr));
addr->can_family = AF_CAN;
@@ -444,7 +470,7 @@ static void bcm_rx_changed(struct bcm_op *op, struct canfd_frame *data)
op->frames_filtered = op->frames_abs = 0;
/* this element is not throttled anymore */
- data->flags &= (BCM_CAN_FLAGS_MASK|RX_RECV);
+ data->flags &= ~RX_THR;
memset(&head, 0, sizeof(head));
head.opcode = RX_CHANGED;
@@ -465,13 +491,17 @@ static void bcm_rx_changed(struct bcm_op *op, struct canfd_frame *data)
*/
static void bcm_rx_update_and_send(struct bcm_op *op,
struct canfd_frame *lastdata,
- const struct canfd_frame *rxdata)
+ const struct canfd_frame *rxdata,
+ unsigned char traffic_flags)
{
memcpy(lastdata, rxdata, op->cfsiz);
/* mark as used and throttled by default */
lastdata->flags |= (RX_RECV|RX_THR);
+ /* add own/local/remote traffic flags */
+ lastdata->flags |= traffic_flags;
+
/* throttling mode inactive ? */
if (!op->kt_ival2) {
/* send RX_CHANGED to the user immediately */
@@ -508,7 +538,8 @@ rx_changed_settime:
* received data stored in op->last_frames[]
*/
static void bcm_rx_cmp_to_index(struct bcm_op *op, unsigned int index,
- const struct canfd_frame *rxdata)
+ const struct canfd_frame *rxdata,
+ unsigned char traffic_flags)
{
struct canfd_frame *cf = op->frames + op->cfsiz * index;
struct canfd_frame *lcf = op->last_frames + op->cfsiz * index;
@@ -521,7 +552,7 @@ static void bcm_rx_cmp_to_index(struct bcm_op *op, unsigned int index,
if (!(lcf->flags & RX_RECV)) {
/* received data for the first time => send update to user */
- bcm_rx_update_and_send(op, lcf, rxdata);
+ bcm_rx_update_and_send(op, lcf, rxdata, traffic_flags);
return;
}
@@ -529,7 +560,7 @@ static void bcm_rx_cmp_to_index(struct bcm_op *op, unsigned int index,
for (i = 0; i < rxdata->len; i += 8) {
if ((get_u64(cf, i) & get_u64(rxdata, i)) !=
(get_u64(cf, i) & get_u64(lcf, i))) {
- bcm_rx_update_and_send(op, lcf, rxdata);
+ bcm_rx_update_and_send(op, lcf, rxdata, traffic_flags);
return;
}
}
@@ -537,7 +568,7 @@ static void bcm_rx_cmp_to_index(struct bcm_op *op, unsigned int index,
if (op->flags & RX_CHECK_DLC) {
/* do a real check in CAN frame length */
if (rxdata->len != lcf->len) {
- bcm_rx_update_and_send(op, lcf, rxdata);
+ bcm_rx_update_and_send(op, lcf, rxdata, traffic_flags);
return;
}
}
@@ -644,6 +675,7 @@ static void bcm_rx_handler(struct sk_buff *skb, void *data)
struct bcm_op *op = (struct bcm_op *)data;
const struct canfd_frame *rxframe = (struct canfd_frame *)skb->data;
unsigned int i;
+ unsigned char traffic_flags;
if (op->can_id != rxframe->can_id)
return;
@@ -673,15 +705,24 @@ static void bcm_rx_handler(struct sk_buff *skb, void *data)
return;
}
+ /* compute flags to distinguish between own/local/remote CAN traffic */
+ traffic_flags = 0;
+ if (skb->sk) {
+ traffic_flags |= RX_LOCAL;
+ if (skb->sk == op->sk)
+ traffic_flags |= RX_OWN;
+ }
+
if (op->flags & RX_FILTER_ID) {
/* the easiest case */
- bcm_rx_update_and_send(op, op->last_frames, rxframe);
+ bcm_rx_update_and_send(op, op->last_frames, rxframe,
+ traffic_flags);
goto rx_starttimer;
}
if (op->nframes == 1) {
/* simple compare with index 0 */
- bcm_rx_cmp_to_index(op, 0, rxframe);
+ bcm_rx_cmp_to_index(op, 0, rxframe, traffic_flags);
goto rx_starttimer;
}
@@ -698,7 +739,8 @@ static void bcm_rx_handler(struct sk_buff *skb, void *data)
if ((get_u64(op->frames, 0) & get_u64(rxframe, 0)) ==
(get_u64(op->frames, 0) &
get_u64(op->frames + op->cfsiz * i, 0))) {
- bcm_rx_cmp_to_index(op, i, rxframe);
+ bcm_rx_cmp_to_index(op, i, rxframe,
+ traffic_flags);
break;
}
}
@@ -1675,6 +1717,9 @@ static int bcm_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
}
+ /* assign the flags that have been recorded in bcm_send_to_user() */
+ msg->msg_flags |= *(bcm_flags(skb));
+
skb_free_datagram(sk, skb);
return size;
diff --git a/net/can/isotp.c b/net/can/isotp.c
index d1c6f206f429..25bac0fafc83 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -381,8 +381,9 @@ static int isotp_rcv_fc(struct isotp_sock *so, struct canfd_frame *cf, int ae)
return 1;
}
- /* get communication parameters only from the first FC frame */
- if (so->tx.state == ISOTP_WAIT_FIRST_FC) {
+ /* get static/dynamic communication params from first/every FC frame */
+ if (so->tx.state == ISOTP_WAIT_FIRST_FC ||
+ so->opt.flags & CAN_ISOTP_DYN_FC_PARMS) {
so->txfc.bs = cf->data[ae + 1];
so->txfc.stmin = cf->data[ae + 2];
diff --git a/net/can/j1939/j1939-priv.h b/net/can/j1939/j1939-priv.h
index 16af1a7f80f6..31a93cae5111 100644
--- a/net/can/j1939/j1939-priv.h
+++ b/net/can/j1939/j1939-priv.h
@@ -86,7 +86,7 @@ struct j1939_priv {
unsigned int tp_max_packet_size;
/* lock for j1939_socks list */
- spinlock_t j1939_socks_lock;
+ rwlock_t j1939_socks_lock;
struct list_head j1939_socks;
struct kref rx_kref;
@@ -301,6 +301,7 @@ struct j1939_sock {
int ifindex;
struct j1939_addr addr;
+ spinlock_t filters_lock;
struct j1939_filter *filters;
int nfilters;
pgn_t pgn_rx_filter;
diff --git a/net/can/j1939/main.c b/net/can/j1939/main.c
index ecff1c947d68..a6fb89fa6278 100644
--- a/net/can/j1939/main.c
+++ b/net/can/j1939/main.c
@@ -274,7 +274,7 @@ struct j1939_priv *j1939_netdev_start(struct net_device *ndev)
return ERR_PTR(-ENOMEM);
j1939_tp_init(priv);
- spin_lock_init(&priv->j1939_socks_lock);
+ rwlock_init(&priv->j1939_socks_lock);
INIT_LIST_HEAD(&priv->j1939_socks);
mutex_lock(&j1939_netdev_lock);
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index 14c431663233..305dd72c844c 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -80,16 +80,16 @@ static void j1939_jsk_add(struct j1939_priv *priv, struct j1939_sock *jsk)
jsk->state |= J1939_SOCK_BOUND;
j1939_priv_get(priv);
- spin_lock_bh(&priv->j1939_socks_lock);
+ write_lock_bh(&priv->j1939_socks_lock);
list_add_tail(&jsk->list, &priv->j1939_socks);
- spin_unlock_bh(&priv->j1939_socks_lock);
+ write_unlock_bh(&priv->j1939_socks_lock);
}
static void j1939_jsk_del(struct j1939_priv *priv, struct j1939_sock *jsk)
{
- spin_lock_bh(&priv->j1939_socks_lock);
+ write_lock_bh(&priv->j1939_socks_lock);
list_del_init(&jsk->list);
- spin_unlock_bh(&priv->j1939_socks_lock);
+ write_unlock_bh(&priv->j1939_socks_lock);
j1939_priv_put(priv);
jsk->state &= ~J1939_SOCK_BOUND;
@@ -262,12 +262,17 @@ static bool j1939_sk_match_dst(struct j1939_sock *jsk,
static bool j1939_sk_match_filter(struct j1939_sock *jsk,
const struct j1939_sk_buff_cb *skcb)
{
- const struct j1939_filter *f = jsk->filters;
- int nfilter = jsk->nfilters;
+ const struct j1939_filter *f;
+ int nfilter;
+
+ spin_lock_bh(&jsk->filters_lock);
+
+ f = jsk->filters;
+ nfilter = jsk->nfilters;
if (!nfilter)
/* receive all when no filters are assigned */
- return true;
+ goto filter_match_found;
for (; nfilter; ++f, --nfilter) {
if ((skcb->addr.pgn & f->pgn_mask) != f->pgn)
@@ -276,9 +281,15 @@ static bool j1939_sk_match_filter(struct j1939_sock *jsk,
continue;
if ((skcb->addr.src_name & f->name_mask) != f->name)
continue;
- return true;
+ goto filter_match_found;
}
+
+ spin_unlock_bh(&jsk->filters_lock);
return false;
+
+filter_match_found:
+ spin_unlock_bh(&jsk->filters_lock);
+ return true;
}
static bool j1939_sk_recv_match_one(struct j1939_sock *jsk,
@@ -329,13 +340,13 @@ bool j1939_sk_recv_match(struct j1939_priv *priv, struct j1939_sk_buff_cb *skcb)
struct j1939_sock *jsk;
bool match = false;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
match = j1939_sk_recv_match_one(jsk, skcb);
if (match)
break;
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
return match;
}
@@ -344,11 +355,11 @@ void j1939_sk_recv(struct j1939_priv *priv, struct sk_buff *skb)
{
struct j1939_sock *jsk;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
j1939_sk_recv_one(jsk, skb);
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
}
static void j1939_sk_sock_destruct(struct sock *sk)
@@ -401,6 +412,7 @@ static int j1939_sk_init(struct sock *sk)
atomic_set(&jsk->skb_pending, 0);
spin_lock_init(&jsk->sk_session_queue_lock);
INIT_LIST_HEAD(&jsk->sk_session_queue);
+ spin_lock_init(&jsk->filters_lock);
/* j1939_sk_sock_destruct() depends on SOCK_RCU_FREE flag */
sock_set_flag(sk, SOCK_RCU_FREE);
@@ -703,9 +715,11 @@ static int j1939_sk_setsockopt(struct socket *sock, int level, int optname,
}
lock_sock(&jsk->sk);
+ spin_lock_bh(&jsk->filters_lock);
ofilters = jsk->filters;
jsk->filters = filters;
jsk->nfilters = count;
+ spin_unlock_bh(&jsk->filters_lock);
release_sock(&jsk->sk);
kfree(ofilters);
return 0;
@@ -1080,12 +1094,12 @@ void j1939_sk_errqueue(struct j1939_session *session,
}
/* spread RX notifications to all sockets subscribed to this session */
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
if (j1939_sk_recv_match_one(jsk, &session->skcb))
__j1939_sk_errqueue(session, &jsk->sk, type);
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
};
void j1939_sk_send_loop_abort(struct sock *sk, int err)
@@ -1273,7 +1287,7 @@ void j1939_sk_netdev_event_netdown(struct j1939_priv *priv)
struct j1939_sock *jsk;
int error_code = ENETDOWN;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
jsk->sk.sk_err = error_code;
if (!sock_flag(&jsk->sk, SOCK_DEAD))
@@ -1281,7 +1295,7 @@ void j1939_sk_netdev_event_netdown(struct j1939_priv *priv)
j1939_sk_queue_drop_all(priv, jsk, error_code);
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
}
static int j1939_sk_no_ioctlcmd(struct socket *sock, unsigned int cmd,
diff --git a/net/can/raw.c b/net/can/raw.c
index e6b822624ba2..cb8e6f788af8 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -91,6 +91,10 @@ struct raw_sock {
int recv_own_msgs;
int fd_frames;
int xl_frames;
+ struct can_raw_vcid_options raw_vcid_opts;
+ canid_t tx_vcid_shifted;
+ canid_t rx_vcid_shifted;
+ canid_t rx_vcid_mask_shifted;
int join_filters;
int count; /* number of active filters */
struct can_filter dfilter; /* default/single filter */
@@ -134,10 +138,29 @@ static void raw_rcv(struct sk_buff *oskb, void *data)
return;
/* make sure to not pass oversized frames to the socket */
- if ((!ro->fd_frames && can_is_canfd_skb(oskb)) ||
- (!ro->xl_frames && can_is_canxl_skb(oskb)))
+ if (!ro->fd_frames && can_is_canfd_skb(oskb))
return;
+ if (can_is_canxl_skb(oskb)) {
+ struct canxl_frame *cxl = (struct canxl_frame *)oskb->data;
+
+ /* make sure to not pass oversized frames to the socket */
+ if (!ro->xl_frames)
+ return;
+
+ /* filter CAN XL VCID content */
+ if (ro->raw_vcid_opts.flags & CAN_RAW_XL_VCID_RX_FILTER) {
+ /* apply VCID filter if user enabled the filter */
+ if ((cxl->prio & ro->rx_vcid_mask_shifted) !=
+ (ro->rx_vcid_shifted & ro->rx_vcid_mask_shifted))
+ return;
+ } else {
+ /* no filter => do not forward VCID tagged frames */
+ if (cxl->prio & CANXL_VCID_MASK)
+ return;
+ }
+ }
+
/* eliminate multiple filter matches for the same skb */
if (this_cpu_ptr(ro->uniq)->skb == oskb &&
this_cpu_ptr(ro->uniq)->skbcnt == can_skb_prv(oskb)->skbcnt) {
@@ -698,6 +721,19 @@ static int raw_setsockopt(struct socket *sock, int level, int optname,
ro->fd_frames = ro->xl_frames;
break;
+ case CAN_RAW_XL_VCID_OPTS:
+ if (optlen != sizeof(ro->raw_vcid_opts))
+ return -EINVAL;
+
+ if (copy_from_sockptr(&ro->raw_vcid_opts, optval, optlen))
+ return -EFAULT;
+
+ /* prepare 32 bit values for handling in hot path */
+ ro->tx_vcid_shifted = ro->raw_vcid_opts.tx_vcid << CANXL_VCID_OFFSET;
+ ro->rx_vcid_shifted = ro->raw_vcid_opts.rx_vcid << CANXL_VCID_OFFSET;
+ ro->rx_vcid_mask_shifted = ro->raw_vcid_opts.rx_vcid_mask << CANXL_VCID_OFFSET;
+ break;
+
case CAN_RAW_JOIN_FILTERS:
if (optlen != sizeof(ro->join_filters))
return -EINVAL;
@@ -786,6 +822,21 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
val = &ro->xl_frames;
break;
+ case CAN_RAW_XL_VCID_OPTS:
+ /* user space buffer to small for VCID opts? */
+ if (len < sizeof(ro->raw_vcid_opts)) {
+ /* return -ERANGE and needed space in optlen */
+ err = -ERANGE;
+ if (put_user(sizeof(ro->raw_vcid_opts), optlen))
+ err = -EFAULT;
+ } else {
+ if (len > sizeof(ro->raw_vcid_opts))
+ len = sizeof(ro->raw_vcid_opts);
+ if (copy_to_user(optval, &ro->raw_vcid_opts, len))
+ err = -EFAULT;
+ }
+ break;
+
case CAN_RAW_JOIN_FILTERS:
if (len > sizeof(int))
len = sizeof(int);
@@ -803,23 +854,41 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
return 0;
}
-static bool raw_bad_txframe(struct raw_sock *ro, struct sk_buff *skb, int mtu)
+static void raw_put_canxl_vcid(struct raw_sock *ro, struct sk_buff *skb)
+{
+ struct canxl_frame *cxl = (struct canxl_frame *)skb->data;
+
+ /* sanitize non CAN XL bits */
+ cxl->prio &= (CANXL_PRIO_MASK | CANXL_VCID_MASK);
+
+ /* clear VCID in CAN XL frame if pass through is disabled */
+ if (!(ro->raw_vcid_opts.flags & CAN_RAW_XL_VCID_TX_PASS))
+ cxl->prio &= CANXL_PRIO_MASK;
+
+ /* set VCID in CAN XL frame if enabled */
+ if (ro->raw_vcid_opts.flags & CAN_RAW_XL_VCID_TX_SET) {
+ cxl->prio &= CANXL_PRIO_MASK;
+ cxl->prio |= ro->tx_vcid_shifted;
+ }
+}
+
+static unsigned int raw_check_txframe(struct raw_sock *ro, struct sk_buff *skb, int mtu)
{
/* Classical CAN -> no checks for flags and device capabilities */
if (can_is_can_skb(skb))
- return false;
+ return CAN_MTU;
/* CAN FD -> needs to be enabled and a CAN FD or CAN XL device */
if (ro->fd_frames && can_is_canfd_skb(skb) &&
(mtu == CANFD_MTU || can_is_canxl_dev_mtu(mtu)))
- return false;
+ return CANFD_MTU;
/* CAN XL -> needs to be enabled and a CAN XL device */
if (ro->xl_frames && can_is_canxl_skb(skb) &&
can_is_canxl_dev_mtu(mtu))
- return false;
+ return CANXL_MTU;
- return true;
+ return 0;
}
static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
@@ -829,6 +898,7 @@ static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
struct sockcm_cookie sockc;
struct sk_buff *skb;
struct net_device *dev;
+ unsigned int txmtu;
int ifindex;
int err = -EINVAL;
@@ -869,9 +939,16 @@ static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
goto free_skb;
err = -EINVAL;
- if (raw_bad_txframe(ro, skb, dev->mtu))
+
+ /* check for valid CAN (CC/FD/XL) frame content */
+ txmtu = raw_check_txframe(ro, skb, dev->mtu);
+ if (!txmtu)
goto free_skb;
+ /* only CANXL: clear/forward/set VCID value */
+ if (txmtu == CANXL_MTU)
+ raw_put_canxl_vcid(ro, skb);
+
sockcm_init(&sockc, sk);
if (msg->msg_controllen) {
err = sock_cmsg_send(sk, msg, &sockc);
generated by cgit v1.2.3 (git 2.39.0) at 2025-12-15 14:23:14 +0300