2 files changed, 58 insertions, 0 deletions
diff --git a/src/libsystemd/sd-network/network-util.c b/src/libsystemd/sd-network/network-util.c
index 08ed942638..0addabe10a 100644
--- a/src/libsystemd/sd-network/network-util.c
+++ b/src/libsystemd/sd-network/network-util.c
@@ -26,6 +26,7 @@ bool network_is_online(void) {
 }
 
 static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
+        [LINK_OPERSTATE_MISSING]          = "missing",
         [LINK_OPERSTATE_OFF]              = "off",
         [LINK_OPERSTATE_NO_CARRIER]       = "no-carrier",
         [LINK_OPERSTATE_DORMANT]          = "dormant",
@@ -56,3 +57,49 @@ static const char* const link_address_state_table[_LINK_ADDRESS_STATE_MAX] = {
 };
 
 DEFINE_STRING_TABLE_LOOKUP(link_address_state, LinkAddressState);
+
+int parse_operational_state_range(const char *str, LinkOperationalStateRange *out) {
+        LinkOperationalStateRange range = { _LINK_OPERSTATE_INVALID, _LINK_OPERSTATE_INVALID };
+        _cleanup_free_ const char *min = NULL;
+        const char *p;
+
+        assert(str);
+        assert(out);
+
+        p = strchr(str, ':');
+        if (p) {
+                min = strndup(str, p - str);
+
+                if (!isempty(p + 1)) {
+                        range.max = link_operstate_from_string(p + 1);
+                        if (range.max < 0)
+                                return -EINVAL;
+                }
+        } else
+                min = strdup(str);
+
+        if (!min)
+                return -ENOMEM;
+
+        if (!isempty(min)) {
+                range.min = link_operstate_from_string(min);
+                if (range.min < 0)
+                        return -EINVAL;
+        }
+
+        /* Fail on empty strings. */
+        if (range.min == _LINK_OPERSTATE_INVALID && range.max == _LINK_OPERSTATE_INVALID)
+                return -EINVAL;
+
+        if (range.min == _LINK_OPERSTATE_INVALID)
+                range.min = LINK_OPERSTATE_MISSING;
+        if (range.max == _LINK_OPERSTATE_INVALID)
+                range.max = LINK_OPERSTATE_ROUTABLE;
+
+        if (range.min > range.max)
+                return -EINVAL;
+
+        *out = range;
+
+        return 0;
+}
diff --git a/src/libsystemd/sd-network/network-util.h b/src/libsystemd/sd-network/network-util.h
index a19435393d..425d192f64 100644
--- a/src/libsystemd/sd-network/network-util.h
+++ b/src/libsystemd/sd-network/network-util.h
@@ -8,6 +8,7 @@
 bool network_is_online(void);
 
 typedef enum LinkOperationalState {
+        LINK_OPERSTATE_MISSING,
         LINK_OPERSTATE_OFF,
         LINK_OPERSTATE_NO_CARRIER,
         LINK_OPERSTATE_DORMANT,
@@ -47,3 +48,13 @@ LinkCarrierState link_carrier_state_from_string(const char *s) _pure_;
 
 const char* link_address_state_to_string(LinkAddressState s) _const_;
 LinkAddressState link_address_state_from_string(const char *s) _pure_;
+
+typedef struct LinkOperationalStateRange {
+        LinkOperationalState min;
+        LinkOperationalState max;
+} LinkOperationalStateRange;
+
+#define LINK_OPERSTATE_RANGE_DEFAULT (LinkOperationalStateRange) { LINK_OPERSTATE_DEGRADED, \
+                                                                   LINK_OPERSTATE_ROUTABLE }
+
+int parse_operational_state_range(const char *str, LinkOperationalStateRange *out);