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-rw-r--r--man/systemd.network.xml12
-rw-r--r--src/network/networkd-address.c48
-rw-r--r--src/network/networkd-address.h1
-rw-r--r--src/network/networkd-network-gperf.gperf1
4 files changed, 62 insertions, 0 deletions
diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 1ed7b67086..5e287faa6e 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -652,6 +652,18 @@
<para>An address label.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>PreferredLifetime=</varname></term>
+ <listitem>
+ <para>Allows the default "preferred lifetime" of the address to be overridden.
+ Only three settings are accepted: <literal>forever</literal> or <literal>infinity</literal>
+ which is the default and means that the address never expires, and <literal>0</literal> which means
+ that the address is considered immediately "expired" and will not be used,
+ unless explicitly requested. A setting of PreferredLifetime=0 is useful for
+ addresses which are added to be used only by a specific application,
+ which is then configured to use them explicitly.</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect1>
diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index 429319da6b..8b52a1f742 100644
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -774,6 +774,54 @@ int config_parse_label(const char *unit,
return 0;
}
+int config_parse_lifetime(const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+ Network *network = userdata;
+ _cleanup_address_free_ Address *n = NULL;
+ unsigned k;
+ int r;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = address_new_static(network, section_line, &n);
+ if (r < 0)
+ return r;
+
+ if (STR_IN_SET(rvalue, "forever", "infinity")) {
+ n->cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME;
+ n = NULL;
+
+ return 0;
+ }
+
+ r = safe_atou(rvalue, &k);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse PreferredLifetime, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (k != 0)
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid PreferredLifetime value, ignoring: %d", k);
+ else {
+ n->cinfo.ifa_prefered = k;
+ n = NULL;
+ }
+
+ return 0;
+}
+
bool address_is_ready(const Address *a) {
assert(a);
diff --git a/src/network/networkd-address.h b/src/network/networkd-address.h
index 338f6eb9a2..3c81978fb1 100644
--- a/src/network/networkd-address.h
+++ b/src/network/networkd-address.h
@@ -74,3 +74,4 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
int config_parse_address(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_broadcast(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_label(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_lifetime(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index 471e300fde..550b5e5240 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -65,6 +65,7 @@ Address.Address, config_parse_address,
Address.Peer, config_parse_address, 0, 0
Address.Broadcast, config_parse_broadcast, 0, 0
Address.Label, config_parse_label, 0, 0
+Address.PreferredLifetime, config_parse_lifetime, 0, 0
Route.Gateway, config_parse_gateway, 0, 0
Route.Destination, config_parse_destination, 0, 0
Route.Source, config_parse_destination, 0, 0