add netif info

src/hetrixtools_freebsd/cli.py

@@ -13,6 +13,7 @@ import subprocess
 import base64
 import json
 import jc # holy crap: takes well known utils and produces json!
+import re # for stuff that jc doesn't know
 
 from hetrixtools_freebsd import __version__
 
@@ -58,10 +59,10 @@ class Update:
         self.iops = ""
         self.raid = ""
         self.dh = ""
-        self.nics = ""
-        self.ipv4 = ""
-        self.ipv6 = ""
-        self.conn = ""
+        self.nics = ""         # getNetInfo
+        self.ipv4 = ""         # getNetInfo
+        self.ipv6 = ""         # getNetInfo
+        self.conn = ""         # getNetInfo
         self.temp = ""
         self.serv = ""
         self.cust = ""
@@ -85,6 +86,7 @@ class Update:
         return result.stdout.decode(encoding="utf-8") 
 
     def getVMStatInfo(self):
+        """ Take 2 samples, about 2 seconds apart. Report the difference."""
         # Linux:
         # vmstat 3 2
         # procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
@@ -144,6 +146,29 @@ class Update:
         self.rambuff  = str(0)
         self.ramcache = str(0)
 
+    def getNetInfo(self):
+        """ Take 2 samples, about 2 seconds apart. Report the difference."""
+
+        t0 = json.loads( self.callCommand(command=['netstat', '-f', 'inet', '-b',
+            '-i', '--libxo', 'json']) )
+        time.sleep(2.0)
+        t1 = json.loads( self.callCommand(command=['netstat', '-f', 'inet', '-b',
+            '-i', '--libxo', 'json']) )
+        t0list = {ifname['name']:(ifname['sent-bytes'], ifname['received-bytes']) 
+            for ifname in t0 ['statistics']['interface']}
+        t1list = {ifname['name']:(ifname['sent-bytes'], ifname['received-bytes']) 
+            for ifname in t1 ['statistics']['interface']}
+        
+        result = []
+        for ifname in t0list:
+            result.append("{},{},{};".format(ifname, t1[ifname][0]-t0[ifname][0],
+                 t1[ifname][1]-t0[ifname][1]))
+
+        self.nics = result
+        self.ipv4 = ""         # getNetInfo
+        self.ipv6 = ""         # getNetInfo
+        self.conn = ""         # getNetInfo
+
     def getSysCtlInfo(self):
         """ Parses all the things that can be gotten from sysctl and sets all the
             values in the data structure. Other values can come from other places.