From 4a5ea44daa2241bad234f26491050b10e14916ef Mon Sep 17 00:00:00 2001
From: Dirk Alders <dirk@mount-mockery.de>
Date: Sat, 23 Mar 2024 14:06:19 +0100
Subject: [PATCH] netst added to my bin folder

---
 .gitignore                 |  2 ++
 netst                      |  6 ++++
 netst.src/netst.py         | 60 ++++++++++++++++++++++++++++++++++++++
 netst.src/requirements.txt |  3 ++
 4 files changed, 71 insertions(+)
 create mode 100755 netst
 create mode 100644 netst.src/netst.py
 create mode 100644 netst.src/requirements.txt

diff --git a/.gitignore b/.gitignore
index c674098..134f3a4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+*/venv
+
 # ---> Linux
 *~
 
diff --git a/netst b/netst
new file mode 100755
index 0000000..07d7d6a
--- /dev/null
+++ b/netst
@@ -0,0 +1,6 @@
+#!/bin/bash
+#
+BASEDIR=$(dirname $0)
+
+$BASEDIR/netst.src/venv/bin/python $BASEDIR/netst.src/netst.py $*
+
diff --git a/netst.src/netst.py b/netst.src/netst.py
new file mode 100644
index 0000000..6d2c923
--- /dev/null
+++ b/netst.src/netst.py
@@ -0,0 +1,60 @@
+import dns.resolver
+import ifcfg 
+import json
+import socket
+import struct
+import sys
+import time
+
+def gateway(device):
+    with open("/proc/net/route") as fh:
+        # skip header
+        next(fh)
+        for line in fh:
+            routes = line.strip().split()
+            if routes[0] == device:
+                destination = socket.inet_ntoa(struct.pack("<L", int(routes[1], 16)))
+                if destination != "0.0.0.0":
+                    continue
+                return socket.inet_ntoa(struct.pack("<L", int(routes[2], 16)))
+
+
+try:
+    DEVICE = sys.argv[1]
+except IndexError:
+    print("You need to give the device name as first argument")
+    sys.exit()
+
+HRN = {     # Human Readable Name
+    'MAC': 'ether',
+    'MTU': 'mtu',
+    'IP': 'inet',
+    'Netmask': 'netmask',
+}
+
+try:
+    info = ifcfg.interfaces()[DEVICE]
+except KeyError:
+    print("Unknown device:", DEVICE)
+    sys.exit(1)
+try:
+    dns_resolver = dns.resolver.Resolver()
+except dns.resolver.NoResolverConfiguration:
+    dns_server = []
+else:
+    dns_server = dns_resolver.nameservers
+
+print('+' + 27 * '-' + '+')
+print("|%9s: %s" % ('Device', DEVICE) + (16 - len(DEVICE)) * ' ' + '|')
+print('+' + 27 * '-' + '+')
+for name in HRN:
+    print("%10s: %s" % (name, info[HRN[name]]))
+print("%10s: %s" % ('Gateway', gateway(DEVICE)))
+
+try:
+    print("%10s: %s" % ("Domain", socket.getfqdn().split('.', 1)[1]))
+except IndexError:
+    print("%10s: None" % "Domain")
+for i, dns in enumerate(dns_server):
+    print("%10s: %s" % ("DNS_%d" % (i + 1), dns))
+
diff --git a/netst.src/requirements.txt b/netst.src/requirements.txt
new file mode 100644
index 0000000..353c099
--- /dev/null
+++ b/netst.src/requirements.txt
@@ -0,0 +1,3 @@
+ifcfg
+dnspython
+