add netstat -r support for linux

docs/parsers/netstat.md

@@ -374,16 +374,19 @@ Returns:
         "sndbuf":            integer,
         "rxbytes":           integer,
         "txbytes":           integer,
-
-
         "destination":       string,
         "gateway":           string,
         "route_flags":       string,
         "route_refs":        integer,
         "use":               integer,
         "mtu":               integer,
-        "netif":             string,
+        "expire":            string,
-        "expire":            string
+        "genmask":           string,
+        "mss":               integer,
+        "window":            integer,
+        "irtt":              integer,
+        "iface":             string,
+        "metric":            integer
       }
     ]
 

jc/parsers/netstat.py

@@ -381,16 +381,19 @@ def process(proc_data):
             "sndbuf":            integer,
             "rxbytes":           integer,
             "txbytes":           integer,
-
-
             "destination":       string,
             "gateway":           string,
             "route_flags":       string,
             "route_refs":        integer,
             "use":               integer,
             "mtu":               integer,
-            "netif":             string,
+            "expire":            string,
-            "expire":            string
+            "genmask":           string,
+            "mss":               integer,
+            "window":            integer,
+            "irtt":              integer,
+            "iface":             string,
+            "metric":            integer
           }
         ]
     """
@@ -398,7 +401,7 @@ def process(proc_data):
         # integer changes
         int_list = ['recv_q', 'send_q', 'pid', 'refcnt', 'inode', 'unit', 'vendor', 'class',
                     'osx_flags', 'subcla', 'pcbcount', 'rcvbuf', 'sndbuf', 'rxbytes', 'txbytes',
-                    'route_refs', 'use', 'mtu']
+                    'route_refs', 'use', 'mtu', 'mss', 'window', 'irtt', 'metric']
         for key in int_list:
             if key in entry:
                 try:

jc/parsers/netstat_linux.py

@@ -14,6 +14,15 @@ def normalize_headers(header):
     return header
 
 
+def normalize_route_headers(header):
+    header = header.lower()
+    header = header.replace('flags', 'route_flags')
+    header = header.replace('ref', 'route_refs')
+    header = header.replace('-', '_')
+
+    return header
+
+
 def parse_network(headers, entry):
     # Count words in header
     # if len of line is one less than len of header, then insert None in field 5
@@ -62,6 +71,14 @@ def parse_socket(header_text, headers, entry):
     return output_line
 
 
+def parse_route(headers, entry):
+    entry = entry.split(maxsplit=len(headers) - 1)
+    output_line = dict(zip(headers, entry))
+    output_line['kind'] = 'route'
+
+    return output_line
+
+
 def parse_post(raw_data):
     # clean up trailing whitespace on each item in each entry
     # flags --- = null
@@ -139,6 +156,7 @@ def parse(cleandata):
     network = False
     socket = False
     bluetooth = False
+    routing_table = False
     headers = None
 
     for line in cleandata:
@@ -147,18 +165,28 @@ def parse(cleandata):
             network = True
             socket = False
             bluetooth = False
+            routing_table = False
             continue
 
         if line.startswith('Active UNIX'):
             network = False
             socket = True
             bluetooth = False
+            routing_table = False
             continue
 
         if line.startswith('Active Bluetooth'):
             network = False
             socket = False
             bluetooth = True
+            routing_table = False
+            continue
+
+        if line.startswith('Kernel IP routing table'):
+            network = False
+            socket = False
+            bluetooth = False
+            routing_table = True
             continue
 
         if line.startswith('Proto'):
@@ -166,6 +194,11 @@ def parse(cleandata):
             headers = header_text.split()
             continue
 
+        if line.startswith('Destination '):
+            header_text = normalize_route_headers(line)
+            headers = header_text.split()
+            continue
+
         if network:
             raw_output.append(parse_network(headers, line))
             continue
@@ -178,4 +211,8 @@ def parse(cleandata):
             # not implemented
             continue
 
+        if routing_table:
+            raw_output.append(parse_route(headers, line))
+            continue
+
     return parse_post(raw_output)

jc/parsers/netstat_osx.py

@@ -17,6 +17,7 @@ def normalize_route_headers(header):
     header = header.lower()
     header = header.replace('flags', 'route_flags')
     header = header.replace('refs', 'route_refs')
+    header = header.replace('netif', 'iface')
     header = header.replace('-', '_')
 
     return header

tests/fixtures/centos-7.7/netstat-r.out

@@ -0,0 +1,5 @@
+Kernel IP routing table
+Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
+default         gateway         0.0.0.0         UG        0 0          0 ens33
+172.17.0.0      0.0.0.0         255.255.0.0     U         0 0          0 docker0
+192.168.71.0    0.0.0.0         255.255.255.0   U         0 0          0 ens33

tests/fixtures/centos-7.7/netstat-rne.out

@@ -0,0 +1,5 @@
+Kernel IP routing table
+Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
+0.0.0.0         192.168.71.2    0.0.0.0         UG    100    0        0 ens33
+172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker0
+192.168.71.0    0.0.0.0         255.255.255.0   U     100    0        0 ens33

tests/fixtures/centos-7.7/netstat-rnee.out

@@ -0,0 +1,5 @@
+Kernel IP routing table
+Destination     Gateway         Genmask         Flags Metric Ref    Use Iface    MSS   Window irtt
+0.0.0.0         192.168.71.2    0.0.0.0         UG    100    0        0 ens33    0     0      0
+172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker   0     0      0
+192.168.71.0    0.0.0.0         255.255.255.0   U     100    0        0 ens33    0     0      0