shelldriver: allow dashes and dots in device names

The `get_ip_addresses` may be called with a specific device and returns
alls IP addresses on that interface. Due to a limitation in the regex,
devices including either dashes or dots aren't detected.

On the OpenWrt distributions the default device is called `br-lan`,
usually connecting ethernet ports and WiFi devices. Likewise dots are
attached to the device name to specify VLANs.

This commit extends the regex to support both dashes and dots.

Signed-off-by: Paul Spooren <mail@aparcar.org>

Author: aparcar

labgrid/driver/shelldriver.py

@@ -596,7 +596,7 @@ def get_ip_addresses(self, device=None):
             device = self.get_default_interface_device_name()
 
         regex = r"""\d+: # leading number
-                \s+\w+ # interface name
+                \s+[\w\.-]+ # interface name
                 \s+inet6?\s+(\S+) # IP address, prefix
                 .*global # global scope, not host scope"""
 

tests/test_shelldriver.py

@@ -3,6 +3,8 @@
 from labgrid.driver import ShellDriver, ExecutionError
 from labgrid.exceptions import NoDriverFoundError
 
+from ipaddress import IPv4Interface
+
 
 class TestShellDriver:
     def test_instance(self, target, serial_driver):
@@ -45,3 +47,18 @@ def test_run_with_timeout(self, target_with_fakeconsole, mocker):
         assert res == ['success']
         res = d.run("test")
         assert res == (['success'], [], 0)
+
+    def test_get_ip_addresses(self, target_with_fakeconsole, mocker):
+        fake_ip_addr_show = r"""
+18: br-lan.42    inet 192.168.42.1/24 brd 192.168.42.255 scope global br-lan.42\       valid_lft forever preferred_lft forever
+18: br-lan.42    inet6 fe80::9683:c4ff:fea6:fb6b/64 scope link \       valid_lft forever preferred_lft forever
+"""
+
+        t = target_with_fakeconsole
+        d = ShellDriver(t, "shell", prompt='dummy', login_prompt='dummy', username='dummy')
+        d.on_activate = mocker.MagicMock()
+        d = t.get_driver('ShellDriver')
+        d._run = mocker.MagicMock(return_value=([fake_ip_addr_show], [], 0))
+
+        res = d.get_ip_addresses("br-lan.42")
+        assert res[0] == IPv4Interface("192.168.42.1/24")