ci: run tests in alpine vm

Alpine Linux uses musl libc so now accel-ppp is tested under musl

Currently, Alpine Linux doesn't provide a link to the latest stable version
so direct link to Alpine 3.20 is used

Improved musl support might be used to run on platforms like openwrt
without additional patches

5 files changed, 46 insertions, 4 deletions

diff --git a/tests/accel-pppd/pppoe/conftest.py b/tests/accel-pppd/pppoe/conftest.py
index 8ebaaed3..b3893200 100644
--- a/tests/accel-pppd/pppoe/conftest.py
+++ b/tests/accel-pppd/pppoe/conftest.py
@@ -1,5 +1,6 @@
-import pytest
+import pytest, subprocess, re
 from common import pppd_process
+from packaging.version import Version
 
 # pppd executable file name
 @pytest.fixture()
@@ -13,11 +14,21 @@ def pppd(pytestconfig):
 def pppd_config():
     return ""
 
+# determines which plugin is required - pppoe.so (pppd 2.5.0+) or rp-pppoe.so (pppd <2.5.0)
+def pppd_plugin_so(pppd):
+    command = [pppd, "--version"]
+    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+    pppd_version = Version(re.search(r'\d+\.\d+\.\d+', result.stdout + result.stderr).group())
+    ref_version = Version("2.5.0")
+    if pppd_version >= ref_version:
+        return "pppoe.so"
+    else:
+        return "rp-pppoe.so"
 
 # pppd configuration as command line args
 @pytest.fixture()
-def pppd_args(pppd_config):
-    return pppd_config.split()
+def pppd_args(pppd_config, pppd):
+    return ("plugin " + pppd_plugin_so(pppd) + "\n" + pppd_config).split()
 
 
 # setup and teardown for tests that required running pppd (after accel-pppd)
diff --git a/tests/accel-pppd/pppoe/test_pppoe_disc.py b/tests/accel-pppd/pppoe/test_pppoe_disc.py
index eb069c42..64a0d295 100644
--- a/tests/accel-pppd/pppoe/test_pppoe_disc.py
+++ b/tests/accel-pppd/pppoe/test_pppoe_disc.py
@@ -8,15 +8,23 @@ def accel_pppd_config(veth_pair_netns):
     return (
         """
     [modules]
+    radius
     pppoe
 
+    [core]
+    log-error=/dev/stderr
+
     [log]
     log-debug=/dev/stdout
+    log-file=/dev/stdout
+    log-emerg=/dev/stderr
     level=5
 
     [cli]
     tcp=127.0.0.1:2001
 
+    [radius]
+
     [pppoe]
     ac-name=test-accel
     interface="""
diff --git a/tests/accel-pppd/pppoe/test_pppoe_pado_delay.py b/tests/accel-pppd/pppoe/test_pppoe_pado_delay.py
index 96c73bf8..3a93d920 100644
--- a/tests/accel-pppd/pppoe/test_pppoe_pado_delay.py
+++ b/tests/accel-pppd/pppoe/test_pppoe_pado_delay.py
@@ -30,15 +30,23 @@ def accel_pppd_config(veth_pair_netns):
     return (
         """
     [modules]
+    radius
     pppoe
 
+    [core]
+    log-error=/dev/stderr
+
     [log]
     log-debug=/dev/stdout
+    log-file=/dev/stdout
+    log-emerg=/dev/stderr
     level=5
 
     [cli]
     tcp=127.0.0.1:2001
 
+    [radius]
+
     [pppoe]
     ac-name=test-accel
     pado-delay=1500
diff --git a/tests/accel-pppd/pppoe/test_pppoe_session_wo_auth.py b/tests/accel-pppd/pppoe/test_pppoe_session_wo_auth.py
index 5ce870dd..960b7c94 100644
--- a/tests/accel-pppd/pppoe/test_pppoe_session_wo_auth.py
+++ b/tests/accel-pppd/pppoe/test_pppoe_session_wo_auth.py
@@ -9,12 +9,18 @@ def accel_pppd_config(veth_pair_netns):
     return (
         """
     [modules]
+    radius
     pppoe
     auth_pap
     ippool
 
+    [core]
+    log-error=/dev/stderr
+
     [log]
     log-debug=/dev/stdout
+    log-file=/dev/stdout
+    log-emerg=/dev/stderr
     level=5
 
     [auth]
@@ -27,6 +33,8 @@ def accel_pppd_config(veth_pair_netns):
     [cli]
     tcp=127.0.0.1:2001
 
+    [radius]
+
     [pppoe]
     interface="""
         + veth_pair_netns["veth_a"]
@@ -47,7 +55,6 @@ def pppd_config(veth_pair_netns):
     mtu 1492
     noaccomp
     default-asyncmap
-    plugin rp-pppoe.so
     user loginAB
     password pass123
     nic-"""
diff --git a/tests/accel-pppd/pppoe/test_pppoe_vlan_mon.py b/tests/accel-pppd/pppoe/test_pppoe_vlan_mon.py
index 670abc33..b73189c3 100644
--- a/tests/accel-pppd/pppoe/test_pppoe_vlan_mon.py
+++ b/tests/accel-pppd/pppoe/test_pppoe_vlan_mon.py
@@ -13,15 +13,23 @@ def accel_pppd_config(veth_pair_netns):
     print(veth_pair_netns)
     return """
     [modules]
+    radius
     pppoe
 
+    [core]
+    log-error=/dev/stderr
+
     [log]
     log-debug=/dev/stdout
+    log-file=/dev/stdout
+    log-emerg=/dev/stderr
     level=5
 
     [cli]
     tcp=127.0.0.1:2001
 
+    [radius]
+
     [pppoe]
     ac-name=test-accel
     vlan-mon=%s,10-20