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-rw-r--r--python/vyos/utils/network.py31
1 files changed, 31 insertions, 0 deletions
diff --git a/python/vyos/utils/network.py b/python/vyos/utils/network.py
index 2f181d8d9..bc6899e45 100644
--- a/python/vyos/utils/network.py
+++ b/python/vyos/utils/network.py
@@ -117,6 +117,37 @@ def get_interface_namespace(iface):
if iface == tmp["ifname"]:
return netns
+def is_ipv6_tentative(iface: str, ipv6_address: str) -> bool:
+ """Check if IPv6 address is in tentative state.
+
+ This function checks if an IPv6 address on a specific network interface is
+ in the tentative state. IPv6 tentative addresses are not fully configured
+ and are undergoing Duplicate Address Detection (DAD) to ensure they are
+ unique on the network.
+
+ Args:
+ iface (str): The name of the network interface.
+ ipv6_address (str): The IPv6 address to check.
+
+ Returns:
+ bool: True if the IPv6 address is tentative, False otherwise.
+ """
+ import json
+ from vyos.utils.process import rc_cmd
+
+ rc, out = rc_cmd(f'ip -6 --json address show dev {iface} scope global')
+ if rc:
+ return False
+
+ data = json.loads(out)
+ for addr_info in data[0]['addr_info']:
+ if (
+ addr_info.get('local') == ipv6_address and
+ addr_info.get('tentative', False)
+ ):
+ return True
+ return False
+
def is_wwan_connected(interface):
""" Determine if a given WWAN interface, e.g. wwan0 is connected to the
carrier network or not """