From: Ralf Jung <post@ralfj.de>
Date: Wed, 12 Apr 2017 17:19:01 +0000 (+0200)
Subject: IPv6 method local: allow configuring device
X-Git-Url: https://git.ralfj.de/dyn-nsupdate.git/commitdiff_plain/32be553e5075e9744e0f0793e8a09a205b2dc1c0

IPv6 method local: allow configuring device
---

diff --git a/client-scripts/dyn-ns-client b/client-scripts/dyn-ns-client
index 11e4512..93b977f 100755
--- a/client-scripts/dyn-ns-client
+++ b/client-scripts/dyn-ns-client
@@ -85,7 +85,8 @@ def getMyIPv4(config, verbose = 0):
 def getMyIPv6(config, verbose = 0):
     '''Returns our current IPv6 address, detected as given by the configuration'''
     def local():
-        out = subprocess.check_output(["ip", "addr"])
+        device = config["IPv6"].get("device")
+        out = subprocess.check_output(["ip", "addr", "show"] + ([] if device is None else ["dev", device]))
         for line in out.decode('utf-8').split('\n'):
             m = re.search('inet6 ([a-fA-F0-9:]+)/64 ([a-zA-Z0-9 ]*)', line)
             if m is not None:
diff --git a/dyn-ns-client.conf.dist b/dyn-ns-client.conf.dist
index a833f43..5c13dee 100644
--- a/dyn-ns-client.conf.dist
+++ b/dyn-ns-client.conf.dist
@@ -12,7 +12,7 @@ password = some_secure_password
 # web: Call a website to detect the current, external IPv4 address.
 method = web
 
-# The server to query for web-based IPv4 detection (if enabled).
+# The server to query for web-based IPv4 detection (method = web).
 # Default: same as the global server in the default section.
 # This server should NOT have an AAAA record, or it may return the IPv6 address instead!
 server = ipv4.ns.example.com
@@ -25,8 +25,11 @@ server = ipv4.ns.example.com
 # local: Try to detect the global IPv6 address based on the configuration of the local network interfaces.
 method = none
 
-# The server to query for web-based IPv6 detection.
+# The server to query for web-based IPv6 detection (method = web).
 # Default: same as the global server in the default section.
 # This server should NOT have an A record, or it may return the IPv4 address instead!
 server = ipv6.ns.example.com
 
+# The network device of which to use the IPv6 address for local detection (method = local).
+# If left unset, pick any device.
+device = eth0