add test for older netstat version fix

CHANGELOG

@@ -2,6 +2,7 @@ jc changelog
 
 20211104 v1.17.2 (in progress)
 - Fix ping parser to add Alpine linux support
+- Fix netstat parser for older versions of netstat on linux
 
 20211030 v1.17.1
 - Fix file parser for gzip files

tests/fixtures/generic/netstat-old.json

@@ -0,0 +1 @@
+[{"proto":"tcp","recv_q":0,"send_q":0,"local_address":"0.0.0.0","foreign_address":"0.0.0.0","state":"LISTEN","program_name":"systemd","kind":"network","pid":1,"local_port":"111","foreign_port":"*","transport_protocol":"tcp","network_protocol":"ipv4","local_port_num":111},{"proto":"udp","recv_q":0,"send_q":0,"local_address":"200.4.30.128","foreign_address":"0.0.0.0","state":null,"program_name":"NetworkManager","kind":"network","pid":903,"local_port":"68","foreign_port":"*","transport_protocol":"udp","network_protocol":"ipv4","local_port_num":68},{"proto":"unix","refcnt":2,"flags":"ACC","type":"STREAM","state":"LISTENING","inode":18438,"program_name":"systemd","path":"/run/lvm/lvmpolld.socket","kind":"socket","pid":1},{"proto":"unix","refcnt":2,"flags":null,"type":"DGRAM","state":null,"inode":23569,"program_name":"chronyd","path":"/var/run/chrony/chronyd.sock","kind":"socket","pid":871},{"proto":"unix","refcnt":2,"flags":"ACC","type":"STREAM","state":"LISTENING","inode":23584,"program_name":"gssproxy","path":"/run/gssproxy.sock","kind":"socket","pid":872},{"proto":"unix","refcnt":2,"flags":"ACC","type":"STREAM","state":"LISTENING","inode":18511,"program_name":"systemd","path":"/run/rpcbind.sock","kind":"socket","pid":1},{"proto":"unix","refcnt":2,"flags":"ACC","type":"SEQPACKET","state":"LISTENING","inode":18521,"program_name":"systemd","path":"/run/udev/control","kind":"socket","pid":1},{"proto":"unix","refcnt":3,"flags":null,"type":"DGRAM","state":null,"inode":11098,"program_name":"systemd","path":"/run/systemd/notify","kind":"socket","pid":1},{"proto":"unix","refcnt":2,"flags":null,"type":"DGRAM","state":null,"inode":11100,"program_name":"systemd","path":"/run/systemd/cgroups-agent","kind":"socket","pid":1},{"proto":"unix","refcnt":2,"flags":"ACC","type":"STREAM","state":"LISTENING","inode":24236,"program_name":"sssd","path":"/var/lib/sss/pipes/private/sbus-monitor","kind":"socket","pid":863}]

tests/fixtures/generic/netstat-old.out

@@ -0,0 +1,14 @@
+Active Internet connections (servers and established)
+Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
+tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      1/systemd
+udp        0      0 200.4.30.128:68         0.0.0.0:*                           903/NetworkManager
+Active UNIX domain sockets (servers and established)
+Proto RefCnt Flags       Type       State         I-Node PID/Program name    Path
+unix  2      [ ACC ]     STREAM     LISTENING      18438 1/systemd           /run/lvm/lvmpolld.socket
+unix  2      [ ]         DGRAM                     23569 871/chronyd         /var/run/chrony/chronyd.sock
+unix  2      [ ACC ]     STREAM     LISTENING      23584 872/gssproxy        /run/gssproxy.sock
+unix  2      [ ACC ]     STREAM     LISTENING      18511 1/systemd           /run/rpcbind.sock
+unix  2      [ ACC ]     SEQPACKET  LISTENING      18521 1/systemd           /run/udev/control
+unix  3      [ ]         DGRAM                     11098 1/systemd           /run/systemd/notify
+unix  2      [ ]         DGRAM                     11100 1/systemd           /run/systemd/cgroups-agent
+unix  2      [ ACC ]     STREAM     LISTENING      24236 863/sssd            /var/lib/sss/pipes/private/sbus-monitor

tests/test_netstat.py

@@ -74,6 +74,9 @@ class MyTests(unittest.TestCase):
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/freebsd12/netstat-aT.out'), 'r', encoding='utf-8') as f:
             self.freebsd12_netstat_aT = f.read()
 
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/generic/netstat-old.out'), 'r', encoding='utf-8') as f:
+            self.generic_netstat_old = f.read()
+
         # netstat -r
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/netstat-r.out'), 'r', encoding='utf-8') as f:
             self.centos_7_7_netstat_r = f.read()
@@ -183,6 +186,9 @@ class MyTests(unittest.TestCase):
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/freebsd12/netstat-an.json'), 'r', encoding='utf-8') as f:
             self.freebsd12_netstat_an_json = json.loads(f.read())
 
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/generic/netstat-old.json'), 'r', encoding='utf-8') as f:
+            self.generic_netstat_old_json = json.loads(f.read())
+
         # netsat -r
         with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/netstat-r.json'), 'r', encoding='utf-8') as f:
             self.centos_7_7_netstat_r_json = json.loads(f.read())
@@ -353,6 +359,12 @@ class MyTests(unittest.TestCase):
         """
         self.assertEqual(jc.parsers.netstat.parse(self.freebsd12_netstat_an, quiet=True), self.freebsd12_netstat_an_json)
 
+    def test_netstat_old_generic(self):
+        """
+        Test 'netstat' with older version of netstat on linux
+        """
+        self.assertEqual(jc.parsers.netstat.parse(self.generic_netstat_old, quiet=True), self.generic_netstat_old_json)
+
     def test_netstat_r_centos_7_7(self):
         """
         Test 'netstat -r' on Centos 7.7