man/daemon.xml

@@ -448,27 +448,37 @@
     <refsect2>
       <title>Other Forms of Activation</title>
 
-      <para>Other forms of activation have been suggested and implemented in some systems. However, there are
+      <para>Other forms of activation have been suggested and
-      often simpler or better alternatives, or they can be put together of combinations of the schemes
+      implemented in some systems. However, there are often simpler or
-      above. Example: Sometimes, it appears useful to start daemons or <filename>.socket</filename> units
+      better alternatives, or they can be put together of combinations
-      when a specific IP address is configured on a network interface, because network sockets shall be bound
+      of the schemes above. Example: Sometimes, it appears useful to
-      to the address. However, an alternative to implement this is by utilizing the Linux
+      start daemons or <filename>.socket</filename> units when a
-      <constant>IP_FREEBIND</constant>/<constant>IPV6_FREEBIND</constant> socket option, as accessible via
+      specific IP address is configured on a network interface,
-      <varname>FreeBind=yes</varname> in systemd socket files (see
+      because network sockets shall be bound to the address. However,
-      <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
+      an alternative to implement this is by utilizing the Linux
-      details). This option, when enabled, allows sockets to be bound to a non-local, not configured IP
+      <constant>IP_FREEBIND</constant> socket option, as accessible
-      address, and hence allows bindings to a particular IP address before it actually becomes available,
+      via <varname>FreeBind=yes</varname> in systemd socket files (see
-      making such an explicit dependency to the configured address redundant. Another often suggested trigger
+      <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-      for service activation is low system load. However, here too, a more convincing approach might be to
+      for details). This option, when enabled, allows sockets to be
-      make proper use of features of the operating system, in particular, the CPU or I/O scheduler of
+      bound to a non-local, not configured IP address, and hence
-      Linux. Instead of scheduling jobs from userspace based on monitoring the OS scheduler, it is advisable
+      allows bindings to a particular IP address before it actually
-      to leave the scheduling of processes to the OS scheduler itself. systemd provides fine-grained access
+      becomes available, making such an explicit dependency to the
-      to the CPU and I/O schedulers. If a process executed by the init system shall not negatively impact the
+      configured address redundant. Another often suggested trigger
-      amount of CPU or I/O bandwidth available to other processes, it should be configured with
+      for service activation is low system load. However, here too, a
+      more convincing approach might be to make proper use of features
+      of the operating system, in particular, the CPU or I/O scheduler
+      of Linux. Instead of scheduling jobs from userspace based on
+      monitoring the OS scheduler, it is advisable to leave the
+      scheduling of processes to the OS scheduler itself. systemd
+      provides fine-grained access to the CPU and I/O schedulers. If a
+      process executed by the init system shall not negatively impact
+      the amount of CPU or I/O bandwidth available to other processes,
+      it should be configured with
       <varname>CPUSchedulingPolicy=idle</varname> and/or
-      <varname>IOSchedulingClass=idle</varname>. Optionally, this may be combined with timer-based activation
+      <varname>IOSchedulingClass=idle</varname>. Optionally, this may
-      to schedule background jobs during runtime and with minimal impact on the system, and remove it from
+      be combined with timer-based activation to schedule background
-      the boot phase itself.</para>
+      jobs during runtime and with minimal impact on the system, and
+      remove it from the boot phase itself.</para>
     </refsect2>
 
   </refsect1>

man/systemd.socket.xml

@@ -568,23 +568,26 @@
 
       <varlistentry>
         <term><varname>IPTOS=</varname></term>
-        <listitem><para>Takes an integer argument controlling the IP Type-Of-Service field for packets
+        <listitem><para>Takes an integer argument controlling the IP
-        generated from this socket.  This controls the <constant>IP_TOS</constant> socket option (see
+        Type-Of-Service field for packets generated from this socket.
-        <citerefentry
+        This controls the IP_TOS socket option (see
-        project='die-net'><refentrytitle>ip</refentrytitle><manvolnum>7</manvolnum></citerefentry> for
+        <citerefentry project='die-net'><refentrytitle>ip</refentrytitle><manvolnum>7</manvolnum></citerefentry>
-        details.). Either a numeric string or one of <option>low-delay</option>, <option>throughput</option>,
+        for details.). Either a numeric string or one of
-        <option>reliability</option> or <option>low-cost</option> may be specified.</para></listitem>
+        <option>low-delay</option>, <option>throughput</option>,
+        <option>reliability</option> or <option>low-cost</option> may
+        be specified.</para></listitem>
       </varlistentry>
 
       <varlistentry>
         <term><varname>IPTTL=</varname></term>
-        <listitem><para>Takes an integer argument controlling the IPv4 Time-To-Live/IPv6 Hop-Count field for
+        <listitem><para>Takes an integer argument controlling the IPv4
-        packets generated from this socket. This sets the
+        Time-To-Live/IPv6 Hop-Count field for packets generated from
-        <constant>IP_TTL</constant>/<constant>IPV6_UNICAST_HOPS</constant> socket options (see <citerefentry
+        this socket. This sets the IP_TTL/IPV6_UNICAST_HOPS socket
-        project='die-net'><refentrytitle>ip</refentrytitle><manvolnum>7</manvolnum></citerefentry> and
+        options (see
-        <citerefentry
+        <citerefentry project='die-net'><refentrytitle>ip</refentrytitle><manvolnum>7</manvolnum></citerefentry>
-        project='die-net'><refentrytitle>ipv6</refentrytitle><manvolnum>7</manvolnum></citerefentry> for
+        and
-        details.)</para></listitem>
+        <citerefentry project='die-net'><refentrytitle>ipv6</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+        for details.)</para></listitem>
       </varlistentry>
 
       <varlistentry>
@@ -659,18 +662,20 @@
 
       <varlistentry>
         <term><varname>FreeBind=</varname></term>
-        <listitem><para>Takes a boolean value. Controls whether the socket can be bound to non-local IP
+        <listitem><para>Takes a boolean value. Controls whether the
-        addresses. This is useful to configure sockets listening on specific IP addresses before those IP
+        socket can be bound to non-local IP addresses. This is useful
-        addresses are successfully configured on a network interface. This sets the
+        to configure sockets listening on specific IP addresses before
-        <constant>IP_FREEBIND</constant>/<constant>IPV6_FREEBIND</constant> socket option. For robustness
+        those IP addresses are successfully configured on a network
-        reasons it is recommended to use this option whenever you bind a socket to a specific IP
+        interface. This sets the IP_FREEBIND socket option. For
-        address. Defaults to <option>false</option>.</para></listitem>
+        robustness reasons it is recommended to use this option
+        whenever you bind a socket to a specific IP address. Defaults
+        to <option>false</option>.</para></listitem>
       </varlistentry>
 
       <varlistentry>
         <term><varname>Transparent=</varname></term>
         <listitem><para>Takes a boolean value. Controls the
-        <constant>IP_TRANSPARENT</constant>/<constant>IPV6_TRANSPARENT</constant> socket option. Defaults to
+        IP_TRANSPARENT socket option. Defaults to
         <option>false</option>.</para></listitem>
       </varlistentry>
 

src/basic/missing_network.h

@@ -6,11 +6,6 @@
 #define IPV6_UNICAST_IF 76
 #endif
 
-/* linux/in6.h or netinet/in.h */
-#ifndef IPV6_TRANSPARENT
-#define IPV6_TRANSPARENT 75
-#endif
-
 /* Not exposed but defined at include/net/ip.h */
 #ifndef IPV4_MIN_MTU
 #define IPV4_MIN_MTU 68

src/basic/socket-label.c

@@ -80,15 +80,15 @@ int socket_address_listen(
                 }
 
                 if (free_bind) {
-                        r = socket_set_freebind(fd, socket_address_family(a), true);
+                        r = setsockopt_int(fd, IPPROTO_IP, IP_FREEBIND, true);
                         if (r < 0)
-                                log_warning_errno(r, "IP_FREEBIND/IPV6_FREEBIND failed: %m");
+                                log_warning_errno(r, "IP_FREEBIND failed: %m");
                 }
 
                 if (transparent) {
-                        r = socket_set_transparent(fd, socket_address_family(a), true);
+                        r = setsockopt_int(fd, IPPROTO_IP, IP_TRANSPARENT, true);
                         if (r < 0)
-                                log_warning_errno(r, "IP_TRANSPARENT/IPV6_TRANSPARENT failed: %m");
+                                log_warning_errno(r, "IP_TRANSPARENT failed: %m");
                 }
         }
 

src/basic/socket-util.c

@@ -26,7 +26,6 @@
 #include "macro.h"
 #include "memory-util.h"
 #include "missing_socket.h"
-#include "missing_network.h"
 #include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"
@@ -1205,28 +1204,13 @@ ssize_t recvmsg_safe(int sockfd, struct msghdr *msg, int flags) {
         return n;
 }
 
-int socket_get_family(int fd, int *ret) {
+int socket_pass_pktinfo(int fd, bool b) {
         int af;
         socklen_t sl = sizeof(af);
 
         if (getsockopt(fd, SOL_SOCKET, SO_DOMAIN, &af, &sl) < 0)
                 return -errno;
 
-        if (sl != sizeof(af))
-                return -EINVAL;
-
-        return af;
-}
-
-int socket_set_recvpktinfo(int fd, int af, bool b) {
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
         switch (af) {
 
         case AF_INET:
@@ -1242,142 +1226,3 @@ int socket_set_recvpktinfo(int fd, int af, bool b) {
                 return -EAFNOSUPPORT;
         }
 }
-
-int socket_set_recverr(int fd, int af, bool b) {
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
-        switch (af) {
-
-        case AF_INET:
-                return setsockopt_int(fd, IPPROTO_IP, IP_RECVERR, b);
-
-        case AF_INET6:
-                return setsockopt_int(fd, IPPROTO_IPV6, IPV6_RECVERR, b);
-
-        default:
-                return -EAFNOSUPPORT;
-        }
-}
-
-int socket_set_recvttl(int fd, int af, bool b) {
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
-        switch (af) {
-
-        case AF_INET:
-                return setsockopt_int(fd, IPPROTO_IP, IP_RECVTTL, b);
-
-        case AF_INET6:
-                return setsockopt_int(fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, b);
-
-        default:
-                return -EAFNOSUPPORT;
-        }
-}
-
-int socket_set_ttl(int fd, int af, int ttl) {
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
-        switch (af) {
-
-        case AF_INET:
-                return setsockopt_int(fd, IPPROTO_IP, IP_TTL, ttl);
-
-        case AF_INET6:
-                return setsockopt_int(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, ttl);
-
-        default:
-                return -EAFNOSUPPORT;
-        }
-}
-
-int socket_set_unicast_if(int fd, int af, int ifi) {
-        be32_t ifindex_be = htobe32(ifi);
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
-        switch (af) {
-
-        case AF_INET:
-                if (setsockopt(fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex_be, sizeof(ifindex_be)) < 0)
-                        return -errno;
-
-                return 0;
-
-        case AF_INET6:
-                if (setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_IF, &ifindex_be, sizeof(ifindex_be)) < 0)
-                        return -errno;
-
-                return 0;
-
-        default:
-                return -EAFNOSUPPORT;
-        }
-}
-
-int socket_set_freebind(int fd, int af, bool b) {
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
-        switch (af) {
-
-        case AF_INET:
-                return setsockopt_int(fd, IPPROTO_IP, IP_FREEBIND, b);
-
-        case AF_INET6:
-                return setsockopt_int(fd, IPPROTO_IPV6, IPV6_FREEBIND, b);
-
-        default:
-                return -EAFNOSUPPORT;
-        }
-}
-
-int socket_set_transparent(int fd, int af, bool b) {
-        int r;
-
-        if (af == AF_UNSPEC) {
-                r = socket_get_family(fd, &af);
-                if (r < 0)
-                        return r;
-        }
-
-        switch (af) {
-
-        case AF_INET:
-                return setsockopt_int(fd, IPPROTO_IP, IP_TRANSPARENT, b);
-
-        case AF_INET6:
-                return setsockopt_int(fd, IPPROTO_IPV6, IPV6_TRANSPARENT, b);
-
-        default:
-                return -EAFNOSUPPORT;
-        }
-}

src/basic/socket-util.h

@@ -261,11 +261,4 @@ int socket_bind_to_ifindex(int fd, int ifindex);
 
 ssize_t recvmsg_safe(int sockfd, struct msghdr *msg, int flags);
 
-int socket_get_family(int fd, int *ret);
+int socket_pass_pktinfo(int fd, bool b);
-int socket_set_recvpktinfo(int fd, int af, bool b);
-int socket_set_recverr(int fd, int af, bool b);
-int socket_set_recvttl(int fd, int af, bool b);
-int socket_set_ttl(int fd, int af, int ttl);
-int socket_set_unicast_if(int fd, int af, int ifi);
-int socket_set_freebind(int fd, int af, bool b);
-int socket_set_transparent(int fd, int af, bool b);

src/core/socket.c

@@ -979,11 +979,10 @@ static void socket_close_fds(Socket *s) {
                         (void) unlink(*i);
 }
 
-static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) {
+static void socket_apply_socket_options(Socket *s, int fd) {
         int r;
 
         assert(s);
-        assert(p);
         assert(fd >= 0);
 
         if (s->keep_alive) {
@@ -1047,7 +1046,7 @@ static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) {
         }
 
         if (s->pass_pktinfo) {
-                r = socket_set_recvpktinfo(fd, socket_address_family(&p->address), true);
+                r = socket_pass_pktinfo(fd, true);
                 if (r < 0)
                         log_unit_warning_errno(UNIT(s), r, "Failed to enable packet info socket option: %m");
         }
@@ -1083,8 +1082,16 @@ static void socket_apply_socket_options(Socket *s, SocketPort *p, int fd) {
         }
 
         if (s->ip_ttl >= 0) {
-                r = socket_set_ttl(fd, socket_address_family(&p->address), s->ip_ttl);
+                int x;
-                if (r < 0)
+
+                r = setsockopt_int(fd, IPPROTO_IP, IP_TTL, s->ip_ttl);
+
+                if (socket_ipv6_is_supported())
+                        x = setsockopt_int(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, s->ip_ttl);
+                else
+                        x = -EAFNOSUPPORT;
+
+                if (r < 0 && x < 0)
                         log_unit_warning_errno(UNIT(s), r, "IP_TTL/IPV6_UNICAST_HOPS failed: %m");
         }
 
@@ -1657,7 +1664,7 @@ static int socket_open_fds(Socket *_s) {
                         if (p->fd < 0)
                                 return p->fd;
 
-                        socket_apply_socket_options(s, p, p->fd);
+                        socket_apply_socket_options(s, p->fd);
                         socket_symlink(s);
                         break;
 
@@ -2997,7 +3004,7 @@ static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents,
                 if (cfd < 0)
                         goto fail;
 
-                socket_apply_socket_options(p->socket, p, cfd);
+                socket_apply_socket_options(p->socket, cfd);
         }
 
         socket_enter_running(p->socket, cfd);

src/hostname/hostnamed.c

@@ -189,25 +189,19 @@ static const char* fallback_chassis(void) {
         int v, r;
 
         v = detect_virtualization();
-        if (v < 0)
+        if (VIRTUALIZATION_IS_VM(v))
-                log_debug_errno(v, "Failed to detect virtualization, ignoring: %m");
-        else if (VIRTUALIZATION_IS_VM(v))
                 return "vm";
-        else if (VIRTUALIZATION_IS_CONTAINER(v))
+        if (VIRTUALIZATION_IS_CONTAINER(v))
                 return "container";
 
         r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type);
-        if (r < 0) {
+        if (r < 0)
-                log_debug_errno(v, "Failed to read DMI chassis type, ignoring: %m");
                 goto try_acpi;
-        }
 
         r = safe_atou(type, &t);
         free(type);
-        if (r < 0) {
+        if (r < 0)
-                log_debug_errno(v, "Failed to parse DMI chassis type, ignoring: %m");
                 goto try_acpi;
-        }
 
         /* We only list the really obvious cases here. The DMI data is unreliable enough, so let's not do any
            additional guesswork on top of that.
@@ -223,7 +217,6 @@ static const char* fallback_chassis(void) {
         case 0x4: /* Low Profile Desktop */
         case 0x6: /* Mini Tower */
         case 0x7: /* Tower */
-        case 0xD: /* All in one (i.e. PC built into monitor) */
                 return "desktop";
 
         case 0x8: /* Portable */
@@ -246,24 +239,17 @@ static const char* fallback_chassis(void) {
         case 0x1F: /* Convertible */
         case 0x20: /* Detachable */
                 return "convertible";
-
-        default:
-                log_debug("Unhandled DMI chassis type 0x%02x, ignoring.", t);
         }
 
 try_acpi:
         r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type);
-        if (r < 0) {
+        if (r < 0)
-                log_debug_errno(v, "Failed read ACPI PM profile, ignoring: %m");
                 return NULL;
-        }
 
         r = safe_atou(type, &t);
         free(type);
-        if (r < 0) {
+        if (r < 0)
-                log_debug_errno(v, "Failed parse ACPI PM profile, ignoring: %m");
                 return NULL;
-        }
 
         /* We only list the really obvious cases here as the ACPI data is not really super reliable.
          *
@@ -289,9 +275,6 @@ try_acpi:
 
         case 8: /* Tablet */
                 return "tablet";
-
-        default:
-                log_debug("Unhandled ACPI PM profile 0x%02x, ignoring.", t);
         }
 
         return NULL;
@@ -927,13 +910,13 @@ static const BusObjectImplementation manager_object = {
         .vtables = BUS_VTABLES(hostname_vtable),
 };
 
-static int connect_bus(Context *c, sd_event *event, sd_bus **ret) {
+static int connect_bus(Context *c, sd_event *event, sd_bus **_bus) {
         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
         int r;
 
         assert(c);
         assert(event);
-        assert(ret);
+        assert(_bus);
 
         r = sd_bus_default_system(&bus);
         if (r < 0)
@@ -955,7 +938,8 @@ static int connect_bus(Context *c, sd_event *event, sd_bus **ret) {
         if (r < 0)
                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
 
-        *ret = TAKE_PTR(bus);
+        *_bus = TAKE_PTR(bus);
+
         return 0;
 }
 

src/resolve/resolved-dns-scope.c

@@ -386,27 +386,54 @@ static int dns_scope_socket(
         }
 
         if (s->link) {
-                r = socket_set_unicast_if(fd, sa.sa.sa_family, ifindex);
+                be32_t ifindex_be = htobe32(ifindex);
+
+                if (sa.sa.sa_family == AF_INET) {
+                        r = setsockopt(fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex_be, sizeof(ifindex_be));
                         if (r < 0)
-                        return r;
+                                return -errno;
+                } else if (sa.sa.sa_family == AF_INET6) {
+                        r = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_IF, &ifindex_be, sizeof(ifindex_be));
+                        if (r < 0)
+                                return -errno;
+                }
         }
 
         if (s->protocol == DNS_PROTOCOL_LLMNR) {
                 /* RFC 4795, section 2.5 requires the TTL to be set to 1 */
-                r = socket_set_ttl(fd, sa.sa.sa_family, 1);
+
+                if (sa.sa.sa_family == AF_INET) {
+                        r = setsockopt_int(fd, IPPROTO_IP, IP_TTL, 1);
                         if (r < 0)
                                 return r;
+                } else if (sa.sa.sa_family == AF_INET6) {
+                        r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 1);
+                        if (r < 0)
+                                return r;
+                }
         }
 
         if (type == SOCK_DGRAM) {
                 /* Set IP_RECVERR or IPV6_RECVERR to get ICMP error feedback. See discussion in #10345. */
-                r = socket_set_recverr(fd, sa.sa.sa_family, true);
+
+                if (sa.sa.sa_family == AF_INET) {
+                        r = setsockopt_int(fd, IPPROTO_IP, IP_RECVERR, true);
                         if (r < 0)
                                 return r;
 
-                r = socket_set_recvpktinfo(fd, sa.sa.sa_family, true);
+                        r = setsockopt_int(fd, IPPROTO_IP, IP_PKTINFO, true);
                         if (r < 0)
                                 return r;
+
+                } else if (sa.sa.sa_family == AF_INET6) {
+                        r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_RECVERR, true);
+                        if (r < 0)
+                                return r;
+
+                        r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, true);
+                        if (r < 0)
+                                return r;
+                }
         }
 
         if (ret_socket_address)

src/resolve/resolved-dns-stream.c

@@ -190,10 +190,18 @@ static int dns_stream_identify(DnsStream *s) {
                 s->ifindex = manager_find_ifindex(s->manager, s->local.sa.sa_family, s->local.sa.sa_family == AF_INET ? (union in_addr_union*) &s->local.in.sin_addr : (union in_addr_union*)  &s->local.in6.sin6_addr);
 
         if (s->protocol == DNS_PROTOCOL_LLMNR && s->ifindex > 0) {
+                be32_t ifindex = htobe32(s->ifindex);
+
                 /* Make sure all packets for this connection are sent on the same interface */
-                r = socket_set_unicast_if(s->fd, s->local.sa.sa_family, s->ifindex);
+                if (s->local.sa.sa_family == AF_INET) {
+                        r = setsockopt(s->fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex, sizeof(ifindex));
                         if (r < 0)
-                        log_debug_errno(errno, "Failed to invoke IP_UNICAST_IF/IPV6_UNICAST_IF: %m");
+                                log_debug_errno(errno, "Failed to invoke IP_UNICAST_IF: %m");
+                } else if (s->local.sa.sa_family == AF_INET6) {
+                        r = setsockopt(s->fd, IPPROTO_IPV6, IPV6_UNICAST_IF, &ifindex, sizeof(ifindex));
+                        if (r < 0)
+                                log_debug_errno(errno, "Failed to invoke IPV6_UNICAST_IF: %m");
+                }
         }
 
         s->identified = true;

src/resolve/resolved-dns-stub.c

@@ -543,13 +543,23 @@ static int set_dns_stub_common_socket_options(int fd, int family) {
         if (r < 0)
                 return r;
 
-        r = socket_set_recvpktinfo(fd, family, true);
+        if (family == AF_INET) {
+                r = setsockopt_int(fd, IPPROTO_IP, IP_PKTINFO, true);
                 if (r < 0)
                         return r;
 
-        r = socket_set_recvttl(fd, family, true);
+                r = setsockopt_int(fd, IPPROTO_IP, IP_RECVTTL, true);
                 if (r < 0)
                         return r;
+        } else {
+                r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, true);
+                if (r < 0)
+                        return r;
+
+                r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, true);
+                if (r < 0)
+                        return r;
+        }
 
         return 0;
 }
@@ -651,7 +661,10 @@ static int manager_dns_stub_fd_extra(Manager *m, DnsStubListenerExtra *l, int ty
         /* Do not set IP_TTL for extra DNS stub listners, as the address may not be local and in that case
          * people may want ttl > 1. */
 
-        r = socket_set_freebind(fd, l->family, true);
+        if (l->family == AF_INET)
+                r = setsockopt_int(fd, IPPROTO_IP, IP_FREEBIND, true);
+        else
+                r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_FREEBIND, true);
         if (r < 0)
                 goto fail;
 

src/timesync/timesyncd-manager.c

@@ -647,7 +647,6 @@ static int manager_listen_setup(Manager *m) {
         if (r < 0)
                 return r;
 
-        if (addr.sa.sa_family == AF_INET)
         (void) setsockopt_int(m->server_socket, IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY);
 
         return sd_event_add_io(m->event, &m->event_receive, m->server_socket, EPOLLIN, manager_receive_response, m);