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-rw-r--r--sysdep/bsd/sysio.h51
-rw-r--r--sysdep/linux/netlink/netlink.c21
-rw-r--r--sysdep/linux/sysio.h136
-rw-r--r--sysdep/unix/io.c207
4 files changed, 265 insertions, 150 deletions
diff --git a/sysdep/bsd/sysio.h b/sysdep/bsd/sysio.h
index b0ec456..80f8f94 100644
--- a/sysdep/bsd/sysio.h
+++ b/sysdep/bsd/sysio.h
@@ -27,48 +27,55 @@ set_inaddr(struct in_addr * ia, ip_addr a)
}
static inline char *
-sysio_mcast_setup(sock * s)
+sysio_setup_multicast(sock *s)
{
- u8 zero = 0;
- u8 one = 1;
+ struct in_addr m;
+ u8 zero = 0;
+ u8 ttl = s->ttl;
- if (ipa_nonzero(s->daddr)) {
+ if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
+ return "IP_MULTICAST_LOOP";
- if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
- return "IP_MULTICAST_LOOP";
+ if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0)
+ return "IP_MULTICAST_TTL";
+
+ /* This defines where should we send _outgoing_ multicasts */
+ set_inaddr(&m, s->iface->addr->ip);
+ if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0)
+ return "IP_MULTICAST_IF";
- if (setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_TTL, &one, sizeof(one)) < 0)
- return "IP_MULTICAST_TTL";
- }
return NULL;
}
static inline char *
-sysio_mcast_join(sock * s)
+sysio_join_group(sock *s, ip_addr maddr)
{
- struct in_addr m;
struct ip_mreq mreq;
- char *err;
-
- set_inaddr(&m, s->iface->addr->ip );
bzero(&mreq, sizeof(mreq));
set_inaddr(&mreq.imr_interface, s->iface->addr->ip);
- set_inaddr(&mreq.imr_multiaddr, s->daddr);
+ set_inaddr(&mreq.imr_multiaddr, maddr);
/* And this one sets interface for _receiving_ multicasts from */
- if (ipa_nonzero(s->daddr) &&
- setsockopt(s->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
+ if (setsockopt(s->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
return "IP_ADD_MEMBERSHIP";
+ return NULL;
+}
- /* This defines where should we send _outgoing_ multicasts */
- if (ipa_nonzero(s->daddr) && setsockopt(s->fd, IPPROTO_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0)
- return "IP_MULTICAST_IF";
+static inline char *
+sysio_leave_group(sock *s, ip_addr maddr)
+{
+ struct ip_mreq mreq;
- if (err = sysio_mcast_setup(s))
- return err;
+ bzero(&mreq, sizeof(mreq));
+ set_inaddr(&mreq.imr_interface, s->iface->addr->ip);
+ set_inaddr(&mreq.imr_multiaddr, maddr);
+
+ /* And this one sets interface for _receiving_ multicasts from */
+ if (setsockopt(s->fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
+ return "IP_DROP_MEMBERSHIP";
return NULL;
}
diff --git a/sysdep/linux/netlink/netlink.c b/sysdep/linux/netlink/netlink.c
index 03d4388..f45fe15 100644
--- a/sysdep/linux/netlink/netlink.c
+++ b/sysdep/linux/netlink/netlink.c
@@ -390,7 +390,6 @@ nl_parse_addr(struct nlmsghdr *h)
else
{
ip_addr netmask = ipa_mkmask(ifa.pxlen);
- ip_addr xbrd;
ifa.prefix = ipa_and(ifa.ip, netmask);
ifa.brd = ipa_or(ifa.ip, ipa_not(netmask));
#ifndef IPV6
@@ -398,6 +397,7 @@ nl_parse_addr(struct nlmsghdr *h)
ifa.opposite = ipa_opposite(ifa.ip, i->ifa_prefixlen);
if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST])
{
+ ip_addr xbrd;
memcpy(&xbrd, RTA_DATA(a[IFA_BROADCAST]), sizeof(xbrd));
ipa_ntoh(xbrd);
if (ipa_equal(xbrd, ifa.prefix) || ipa_equal(xbrd, ifa.brd))
@@ -472,6 +472,9 @@ krt_capable(rte *e)
switch (a->dest)
{
case RTD_ROUTER:
+ if (ipa_has_link_scope(a->gw) && (a->iface == NULL))
+ return 0;
+
case RTD_DEVICE:
case RTD_BLACKHOLE:
case RTD_UNREACHABLE:
@@ -514,6 +517,11 @@ nl_send_route(struct krt_proto *p, rte *e, int new)
case RTD_ROUTER:
r.r.rtm_type = RTN_UNICAST;
nl_add_attr_ipa(&r.h, sizeof(r), RTA_GATEWAY, a->gw);
+
+ /* a->iface != NULL checked in krt_capable() */
+ if (ipa_has_link_scope(a->gw))
+ nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, a->iface->index);
+
break;
case RTD_DEVICE:
if (!a->iface)
@@ -678,6 +686,7 @@ nl_parse_route(struct nlmsghdr *h, int scan)
}
if (a[RTA_GATEWAY])
{
+ struct iface *ifa = if_find_by_index(oif);
neighbor *ng;
ra.dest = RTD_ROUTER;
memcpy(&ra.gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ra.gw));
@@ -696,15 +705,19 @@ nl_parse_route(struct nlmsghdr *h, int scan)
}
else
{
- /* standard route */
- ng = neigh_find(&p->p, &ra.gw, 0);
+ ng = neigh_find2(&p->p, &ra.gw, ifa, 0);
if (ng && ng->scope)
- ra.iface = ng->iface;
+ {
+ if (ng->iface != ifa)
+ log(L_WARN "KRT: Route with unexpected iface for %I/%d", net->n.prefix, net->n.pxlen);
+ ra.iface = ng->iface;
+ }
else
{
log(L_WARN "Kernel told us to use non-neighbor %I for %I/%d", ra.gw, net->n.prefix, net->n.pxlen);
return;
}
+
}
}
else
diff --git a/sysdep/linux/sysio.h b/sysdep/linux/sysio.h
index 2fa5f0a..70d35cc 100644
--- a/sysdep/linux/sysio.h
+++ b/sysdep/linux/sysio.h
@@ -38,27 +38,33 @@ set_inaddr(struct in_addr *ia, ip_addr a)
* ways. Horrible.
*/
-static inline char *sysio_mcast_setup(sock *s)
+
+#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND)
+/*
+ * Older kernels support only struct mreq which matches interfaces by their
+ * addresses and thus fails on unnumbered devices. On newer 2.0 kernels
+ * we can use SO_BINDTODEVICE to circumvent this problem.
+ */
+
+#define MREQ_IFA struct in_addr
+#define MREQ_GRP struct ip_mreq
+static inline void fill_mreq_ifa(struct in_addr *m, struct iface *ifa, UNUSED ip_addr maddr)
{
- int zero = 0;
+ set_inaddr(m, ifa->addr->ip);
+}
- if (ipa_nonzero(s->daddr))
- {
- if (
-#ifdef IP_DEFAULT_MULTICAST_TTL
- s->ttl != IP_DEFAULT_MULTICAST_TTL &&
-#endif
- setsockopt(s->fd, SOL_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0)
- return "IP_MULTICAST_TTL";
- if (
-#ifdef IP_DEFAULT_MULTICAST_LOOP
- IP_DEFAULT_MULTICAST_LOOP &&
+static inline void fill_mreq_grp(struct ip_mreq *m, struct iface *ifa, ip_addr maddr)
+{
+ bzero(m, sizeof(*m));
+#ifdef CONFIG_LINUX_MC_MREQ_BIND
+ m->imr_interface.s_addr = INADDR_ANY;
+#else
+ set_inaddr(&m->imr_interface, ifa->addr->ip);
#endif
- setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
- return "IP_MULTICAST_LOOP";
- }
- return NULL;
+ set_inaddr(&m->imr_multiaddr, maddr);
}
+#endif
+
#ifdef CONFIG_LINUX_MC_MREQN
/*
@@ -76,70 +82,78 @@ struct ip_mreqn
};
#endif
-static inline char *sysio_mcast_join(sock *s)
+#define MREQ_IFA struct ip_mreqn
+#define MREQ_GRP struct ip_mreqn
+#define fill_mreq_ifa fill_mreq
+#define fill_mreq_grp fill_mreq
+
+static inline fill_mreq(struct ip_mreqn *m, struct iface *ifa, ip_addr maddr)
{
- struct ip_mreqn mreq;
- char *err;
- struct ifreq ifr;
-
- if (err = sysio_mcast_setup(s))
- return err;
- strcpy(ifr.ifr_name, s->iface->name);
- if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
- return "SO_BINDTODEVICE";
- mreq.imr_ifindex = s->iface->index;
- set_inaddr(&mreq.imr_address, s->iface->addr->ip);
- set_inaddr(&mreq.imr_multiaddr, s->daddr);
- /* This defines where should we send _outgoing_ multicasts */
- if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
- return "IP_MULTICAST_IF";
- /* And this one sets interface for _receiving_ multicasts from */
- if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
- return "IP_ADD_MEMBERSHIP";
- return NULL;
+ bzero(m, sizeof(*m));
+ m->imr_ifindex = ifa->index;
+ set_inaddr(&m->imr_address, ifa->addr->ip);
+ set_inaddr(&m->imr_multiaddr, maddr);
}
#endif
-#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND)
-/*
- * Older kernels support only struct mreq which matches interfaces by their
- * addresses and thus fails on unnumbered devices. On newer 2.0 kernels
- * we can use SO_BINDTODEVICE to circumvent this problem.
- */
-
-static inline char *sysio_mcast_join(sock *s)
+static inline char *
+sysio_setup_multicast(sock *s)
{
- struct in_addr mreq;
- struct ip_mreq mreq_add;
- char *err;
+ MREQ_IFA m;
+ int zero = 0;
- if (err = sysio_mcast_setup(s))
- return err;
- set_inaddr(&mreq, s->iface->addr->ip);
-#ifdef CONFIG_LINUX_MC_MREQ_BIND
+ if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
+ return "IP_MULTICAST_LOOP";
+
+ if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0)
+ return "IP_MULTICAST_TTL";
+
+ /* This defines where should we send _outgoing_ multicasts */
+ fill_mreq_ifa(&m, s->iface, IPA_NONE);
+ if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0)
+ return "IP_MULTICAST_IF";
+
+#if defined(CONFIG_LINUX_MC_MREQ_BIND) || defined(CONFIG_LINUX_MC_MREQN)
{
struct ifreq ifr;
strcpy(ifr.ifr_name, s->iface->name);
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
return "SO_BINDTODEVICE";
- mreq_add.imr_interface.s_addr = INADDR_ANY;
}
-#else
- mreq_add.imr_interface = mreq;
#endif
- set_inaddr(&mreq_add.imr_multiaddr, s->daddr);
- /* This defines where should we send _outgoing_ multicasts */
- if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
- return "IP_MULTICAST_IF";
+
+ return NULL;
+}
+
+static inline char *
+sysio_join_group(sock *s, ip_addr maddr)
+{
+ MREQ_GRP m;
+
/* And this one sets interface for _receiving_ multicasts from */
- if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq_add, sizeof(mreq_add)) < 0)
+ fill_mreq_grp(&m, s->iface, maddr);
+ if (setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_ADD_MEMBERSHIP";
+
+ return NULL;
+}
+
+static inline char *
+sysio_leave_group(sock *s, ip_addr maddr)
+{
+ MREQ_GRP m;
+
+ /* And this one sets interface for _receiving_ multicasts from */
+ fill_mreq_grp(&m, s->iface, maddr);
+ if (setsockopt(s->fd, SOL_IP, IP_DROP_MEMBERSHIP, &m, sizeof(m)) < 0)
+ return "IP_DROP_MEMBERSHIP";
+
return NULL;
}
-#endif
#endif
+
#include <linux/socket.h>
#include <linux/tcp.h>
diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c
index 330aea4..3eb2e03 100644
--- a/sysdep/unix/io.c
+++ b/sysdep/unix/io.c
@@ -627,6 +627,12 @@ fill_in_sockaddr(sockaddr *sa, ip_addr a, unsigned port)
set_inaddr(&sa->sin6_addr, a);
}
+static inline void
+fill_in_sockifa(sockaddr *sa, struct iface *ifa)
+{
+ sa->sin6_scope_id = ifa ? ifa->index : 0;
+}
+
void
get_sockaddr(struct sockaddr_in6 *sa, ip_addr *a, unsigned *port, int check)
{
@@ -652,6 +658,11 @@ fill_in_sockaddr(sockaddr *sa, ip_addr a, unsigned port)
set_inaddr(&sa->sin_addr, a);
}
+static inline void
+fill_in_sockifa(sockaddr *sa, struct iface *ifa)
+{
+}
+
void
get_sockaddr(struct sockaddr_in *sa, ip_addr *a, unsigned *port, int check)
{
@@ -670,8 +681,7 @@ sk_set_ttl_int(sock *s)
{
int one = 1;
#ifdef IPV6
- if (s->type != SK_UDP_MC && s->type != SK_IP_MC &&
- setsockopt(s->fd, SOL_IPV6, IPV6_UNICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0)
+ if (setsockopt(s->fd, SOL_IPV6, IPV6_UNICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0)
return "IPV6_UNICAST_HOPS";
#else
if (setsockopt(s->fd, SOL_IP, IP_TTL, &s->ttl, sizeof(s->ttl)) < 0)
@@ -768,6 +778,134 @@ sk_set_md5_auth(sock *s, ip_addr a, char *passwd)
return sk_set_md5_auth_int(s, &sa, passwd);
}
+int
+sk_set_broadcast(sock *s, int enable)
+{
+ if (setsockopt(s->fd, SOL_SOCKET, SO_BROADCAST, &enable, sizeof(enable)) < 0)
+ log(L_ERR "sk_set_broadcast: SO_BROADCAST: %m");
+}
+
+
+#ifdef IPV6
+
+int
+sk_setup_multicast(sock *s)
+{
+ char *err;
+ int zero = 0;
+ int index;
+
+ ASSERT(s->iface && s->iface->addr);
+
+ index = s->iface->index;
+ if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0)
+ ERR("IPV6_MULTICAST_HOPS");
+ if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
+ ERR("IPV6_MULTICAST_LOOP");
+ if (setsockopt(s->fd, SOL_IPV6, IPV6_MULTICAST_IF, &index, sizeof(index)) < 0)
+ ERR("IPV6_MULTICAST_IF");
+
+ return 0;
+
+bad:
+ log(L_ERR "sk_setup_multicast: %s: %m", err);
+ return -1;
+}
+
+int
+sk_join_group(sock *s, ip_addr maddr)
+{
+ struct ipv6_mreq mreq;
+
+ set_inaddr(&mreq.ipv6mr_multiaddr, maddr);
+
+#ifdef CONFIG_IPV6_GLIBC_20
+ mreq.ipv6mr_ifindex = s->iface->index;
+#else
+ mreq.ipv6mr_interface = s->iface->index;
+#endif
+
+ /* RFC 2553 says IPV6_JOIN_GROUP */
+ if (setsockopt(s->fd, SOL_IPV6, IPV6_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
+ {
+ log(L_ERR "sk_join_group: IPV6_ADD_MEMBERSHIP: %m");
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+sk_leave_group(sock *s, ip_addr maddr)
+{
+ struct ipv6_mreq mreq;
+
+ set_inaddr(&mreq.ipv6mr_multiaddr, maddr);
+
+#ifdef CONFIG_IPV6_GLIBC_20
+ mreq.ipv6mr_ifindex = s->iface->index;
+#else
+ mreq.ipv6mr_interface = s->iface->index;
+#endif
+
+ /* RFC 2553 says IPV6_LEAVE_GROUP */
+ if (setsockopt(s->fd, SOL_IPV6, IPV6_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
+ {
+ log(L_ERR "sk_leave_group: IPV6_DROP_MEMBERSHIP: %m");
+ return -1;
+ }
+
+ return 0;
+}
+
+#else /* IPV4 */
+
+int
+sk_setup_multicast(sock *s)
+{
+ char *err;
+
+ ASSERT(s->iface && s->iface->addr);
+
+ if (err = sysio_setup_multicast(s))
+ {
+ log(L_ERR "sk_setup_multicast: %s: %m", err);
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+sk_join_group(sock *s, ip_addr maddr)
+{
+ char *err;
+
+ if (err = sysio_join_group(s, maddr))
+ {
+ log(L_ERR "sk_join_group: %s: %m", err);
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+sk_leave_group(sock *s, ip_addr maddr)
+{
+ char *err;
+
+ if (err = sysio_leave_group(s, maddr))
+ {
+ log(L_ERR "sk_leave_group: %s: %m", err);
+ return -1;
+ }
+
+ return 0;
+}
+
+#endif
+
static void
sk_tcp_connected(sock *s)
@@ -841,11 +979,9 @@ sk_open(sock *s)
fd = socket(BIRD_PF, SOCK_STREAM, IPPROTO_TCP);
break;
case SK_UDP:
- case SK_UDP_MC:
fd = socket(BIRD_PF, SOCK_DGRAM, IPPROTO_UDP);
break;
case SK_IP:
- case SK_IP_MC:
fd = socket(BIRD_PF, SOCK_RAW, s->dport);
break;
case SK_MAGIC:
@@ -861,61 +997,11 @@ sk_open(sock *s)
if (err = sk_setup(s))
goto bad;
- switch (type)
- {
- case SK_UDP:
- case SK_IP:
- if (s->iface) /* It's a broadcast socket */
-#ifdef IPV6
- bug("IPv6 has no broadcasts");
-#else
- if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
- ERR("SO_BROADCAST");
-#endif
- break;
- case SK_UDP_MC:
- case SK_IP_MC:
- {
-#ifdef IPV6
- /* Fortunately, IPv6 socket interface is recent enough and therefore standardized */
- ASSERT(s->iface && s->iface->addr);
- if (ipa_nonzero(s->daddr))
- {
- int t = s->iface->index;
- int zero = 0;
- if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_HOPS, &s->ttl, sizeof(s->ttl)) < 0)
- ERR("IPV6_MULTICAST_HOPS");
- if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
- ERR("IPV6_MULTICAST_LOOP");
- if (setsockopt(fd, SOL_IPV6, IPV6_MULTICAST_IF, &t, sizeof(t)) < 0)
- ERR("IPV6_MULTICAST_IF");
- }
- if (has_src)
- {
- struct ipv6_mreq mreq;
- set_inaddr(&mreq.ipv6mr_multiaddr, s->daddr);
-#ifdef CONFIG_IPV6_GLIBC_20
- mreq.ipv6mr_ifindex = s->iface->index;
-#else
- mreq.ipv6mr_interface = s->iface->index;
-#endif /* CONFIG_IPV6_GLIBC_20 */
- if (setsockopt(fd, SOL_IPV6, IPV6_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
- ERR("IPV6_ADD_MEMBERSHIP");
- }
-#else
- /* With IPv4 there are zillions of different socket interface variants. Ugh. */
- ASSERT(s->iface && s->iface->addr);
- if (err = sysio_mcast_join(s))
- goto bad;
-#endif /* IPV6 */
- break;
- }
- }
if (has_src)
{
int port;
- if (type == SK_IP || type == SK_IP_MC)
+ if (type == SK_IP)
port = 0;
else
{
@@ -924,12 +1010,8 @@ sk_open(sock *s)
ERR("SO_REUSEADDR");
}
fill_in_sockaddr(&sa, s->saddr, port);
-#ifdef CONFIG_SKIP_MC_BIND
- if ((type != SK_UDP_MC) && (type != SK_IP_MC) &&
- bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0)
-#else
+ fill_in_sockifa(&sa, s->iface);
if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0)
-#endif
ERR("bind");
}
fill_in_sockaddr(&sa, s->daddr, s->dport);
@@ -1050,16 +1132,15 @@ sk_maybe_write(sock *s)
s->ttx = s->tpos = s->tbuf;
return 1;
case SK_UDP:
- case SK_UDP_MC:
case SK_IP:
- case SK_IP_MC:
{
sockaddr sa;
if (s->tbuf == s->tpos)
return 1;
- fill_in_sockaddr(&sa, s->faddr, s->fport);
+ fill_in_sockaddr(&sa, s->faddr, s->fport);
+ fill_in_sockifa(&sa, s->iface);
e = sendto(s->fd, s->tbuf, s->tpos - s->tbuf, 0, (struct sockaddr *) &sa, sizeof(sa));
if (e < 0)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 08:00:36 +0200