man: minor fixes to networkd page

Also enforce that we don't allow setting the Broadcast for IPv6 addresses.

diff --git a/man/systemd-networkd.service.xml b/man/systemd-networkd.service.xml
index 527742cea3db0a93f1e5e910fb177c677c7f942c..9c7ca83438d83c7ab197e38fb65ec0c74f320699 100644 (file)
--- a/man/systemd-networkd.service.xml
+++ b/man/systemd-networkd.service.xml
@@ -61,11 +61,16 @@
                 network devices as they appear, as well as creating virtual
                 network devices.</para>
 
+                <para>To configure low-level link settings independently of
+                networks, see
+                <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+                .</para>
+
                 <para>Network configurations applied before networkd is started
-                are not removed, and configuration applied by networkd are not
-                removed when networkd exits. This ensures restarting networkd
-                does not cut the network connection, and, in particular, that
-                it is safe to transition between the initrd and the real root,
+                are not removed, and static configuration applied by networkd
+                are not removed when networkd exits. This ensures restarting
+                networkd does not cut the network connection, and, in particular,
+                that it is safe to transition between the initrd and the real root,
                 and back.</para>
         </refsect1>
 
@@ -105,14 +110,15 @@
                                 <varlistentry>
                                         <term><varname>Kind</varname></term>
                                         <listitem>
-                                                <para>The netdev kind. Currently, <literal>bridge</literal>, <literal>bond</literal> and <literal>vlan</literal>
+                                                <para>The netdev kind. Currently, <literal>bridge</literal>,
+                                                <literal>bond</literal> and <literal>vlan</literal>
                                                 are supported. This option is compulsory.</para>
                                         </listitem>
                                 </varlistentry>
                         </variablelist>
 
                         <para>The <literal>[VLAN]</literal> section only applies for netdevs of kind <literal>vlan</literal>,
-                        and accepts the following keys:</para>
+                        and accepts the following key:</para>
 
                         <variablelist class='network-directives'>
                                 <varlistentry>
@@ -251,6 +257,15 @@
                                                 <para>As in the <literal>[Network]</literal> section. This key is mandatory.</para>
                                         </listitem>
                                 </varlistentry>
+                                <varlistentry>
+                                        <term><varname>Broadcast</varname></term>
+                                        <listitem>
+                                                <para>The broadcast address, which must be in the format described in
+                                                <citerefentry><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+                                                . This key only applies to IPv4 addresses. If it is not given, it is
+                                                derived from the <literal>Address</literal> key.</para>
+                                        </listitem>
+                                </varlistentry>
                                 <varlistentry>
                                         <term><varname>Label</varname></term>
                                         <listitem>

diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index 560605408f30553996171a79eec3a7d6d4ac7c78..28dcf14c6e1cf1955b75c627dd667694053813b9 100644 (file)
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -275,6 +275,13 @@ int config_parse_broadcast(const char *unit,
         if (r < 0)
                 return r;
 
+        if (n->family == AF_INET6) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Broadcast is not valid for IPv6 addresses, "
+                           "ignoring assignment: %s", address);
+                return 0;
+        }
+
         r = net_parse_inaddr(address, &n->family, &n->broadcast);
         if (r < 0) {
                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,