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Detect gateway dynamically

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This commit is contained in:
Will Bradley 2015-05-17 17:57:25 -07:00
parent 73fdf47d35
commit 53ac0233ca
1 changed files with 20 additions and 4 deletions
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24
pinger.py
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@ -49,6 +49,8 @@ import argparse
import sys
# For graphing
import cairo
# For IP addresses
import socket, struct
# Vars
startup_active_label = "✓ Start Automatically"
@ -85,9 +87,10 @@ for arg in sys.argv[1:]:
if args.target:
host = args.target
else:
host = "8.8.8.8" # IP or hostname of WAN
router = "192.168.1.1" # IP or hostname of router
print "Using default target of 8.8.8.8"
host = "8.8.8.8" # IP or hostname of WAN
router = "192.168.1.1" # IP or hostname of router
if args.freq:
try:
@ -214,7 +217,7 @@ class Pinger:
host_avg = sum(self.host_log)/len(self.host_log)
self.ping_menu.set_label("Internet: "+str(int(round(self.host_log[-1])))+" ms "+str(int(round(host_avg)))+" avg")
if len(self.router_log) > 0:
self.draw_log(ctx, self.router_log, self.icon_height/2)
self.draw_log(ctx, self.router_log, (self.icon_height/2)+1)
router_avg = sum(self.router_log)/len(self.router_log)
self.router_menu.set_label("Router: "+str(int(round(self.router_log[-1])))+" ms "+str(int(round(router_avg)))+" avg")
@ -243,7 +246,7 @@ class Pinger:
self.draw_rect( ctx, [index,(self.icon_height/2)+yOffset], [1,(-self.icon_height/2)-1], danger_color )
else:
# draw normal bar
bar_height = -int(self.scale(ping, (0,max_ping), (0,self.icon_height/2)))
bar_height = -int(self.scale(ping, (0,max_ping), (0,(self.icon_height/2)-1)))
if bar_height > -1:
bar_height = -1
@ -268,6 +271,16 @@ class Pinger:
scale = ((val - src[0]) / (src[1]-src[0])) * (dst[1]-dst[0]) + dst[0]
return scale
def get_default_gateway_linux(self):
# Read the default gateway directly from /proc.
with open("/proc/net/route") as fh:
for line in fh:
fields = line.strip().split()
if fields[1] != '00000000' or not int(fields[3], 16) & 2:
continue
return str(socket.inet_ntoa(struct.pack("<L", int(fields[2], 16))))
def __init__(self):
# Handle ctrl-c
signal.signal(signal.SIGINT, self.destroy)
@ -303,6 +316,9 @@ class Pinger:
self.create_menu_item("Exit", self.destroy)
self.ind.set_menu(self.menu)
# set router / gateway dynamically
router = self.get_default_gateway_linux()
# start the ping process
self.counter = 0
self.timeout = ping_frequency