ipconfig.py

#!/usr/bin/python
"""
ipconfig by Bob Brandt (projects@brandt.ie) inspired by Meir Michanie's
(meirm@riunx.com) implemention.
Licensed under GPL version 3
December 1st 2007
"""
import sys, os, getopt, socket
version = "0.2"

def convertsubnetmask(mask):
subnetmask = ""
for i in [1, 2, 3, 4]:
if mask > 7:
subnetmask = subnetmask + ".255"
elif mask == 7:
subnetmask = subnetmask + ".254"
elif mask == 6:
subnetmask = subnetmask + ".252"
elif mask == 5:
subnetmask = subnetmask + ".248"
elif mask == 4:
subnetmask = subnetmask + ".240"
elif mask == 3:
subnetmask = subnetmask + ".224"
elif mask == 2:
subnetmask = subnetmask + ".192"
elif mask == 1:
subnetmask = subnetmask + ".128"
else:
subnetmask = subnetmask + ".0"
mask = mask - 8
return subnetmask.strip(".")

def getipinfo():
temp = dict()
for line in os.popen("/bin/ip -f inet a"):
check = line.strip('\n').strip().split(' ')
if check[0] == "inet":
if check[2] == "brd":
check.pop(2)
check.pop(2)
if not temp.has_key(check[4]):
temp[check[4]] = []
ipaddress = check[1].split("/")[0]
subnet = convertsubnetmask(long(check[1].split("/")[1]))
scope = check[3]
temp[check[4]].append([ipaddress, subnet, scope])
return temp

def getrouteinfo():
temp = dict()
for line in os.popen("/bin/ip r"):
check = line.strip('\n').strip().split(' ')
if check[1] == "via":
temp[check[0]] = [check[2], check[3], check[4]]
return temp

def getinterfaces():
temp = []
for line in os.popen("/bin/ip l"):
check = line.strip('\n').strip().split(':')
if check[0][0:4] != "link":
temp.append(check[1].strip())
return temp

def getMACs():
temp = dict()
oldline = ""
for line in os.popen("/bin/ip l"):
check = line.strip('\n').strip().split(' ')
if check[0][0:4] == "link":
mac = check[1]
check = oldline.strip('\n').strip().split(':')
interface = check[1].strip()
temp[interface] = mac
oldline = line
return temp

def getdnsinfo(filename = "/etc/resolv.conf"):
templist = []
for line in open(filename):
temp=line.strip('\n').strip().split(' ')
if temp[0] == "nameserver":
temp.pop(0)
templist.append(temp[0])
return templist

def getdomaininfo(filename = "/etc/resolv.conf"):
templist = []
for line in open(filename):
temp=line.strip('\n').strip().split(' ')
if temp[0] == "search":
temp.pop(0)
templist = temp
return templist

def flushDNS(controlfile = "/etc/init.d/nscd"):
os.spawnv(os.P_WAIT, "/usr/bin/sudo", ["sudo", controlfile, "restart"])

def releaseDHCP(controlfile = "/sbin/ifdown-dhcp"):
for item in getinterfaces():
os.spawnv(os.P_WAIT, "/usr/bin/sudo", ["sudo", controlfile, item])

def renewDHCP(controlfile = "/sbin/ifup-dhcp"):
releaseDHCP()
for item in getinterfaces():
os.spawnv(os.P_WAIT, "/usr/bin/sudo", ["sudo", controlfile, item])

def restartNetwork(controlfile = "/etc/init.d/network"):
os.spawnv(os.P_WAIT, "/usr/bin/sudo", ["sudo", controlfile, "restart"])

def printinfo(printtype = "basic"):
print "\nLinux IP Configuration\n"

ipdict = getipinfo()
routedict = getrouteinfo()
macdict = getMACs()
iflist = getinterfaces()
dnslist = getdnsinfo()
domainlist = getdomaininfo()

if printtype == "all":
domain = ""
for item in domainlist:
domain = domain + ", " + item

dns = []
for item in dnslist:
dns.append([" ", item])

print " Host Name . . . . . . . . . . . . :", socket.gethostname()
print " Primary Dns Suffix . . . . . . . :", socket.getfqdn()[len(socket.gethostname()):].strip(".")
print " Node Type . . . . . . . . . . . . : Unknown"
print " IP Routing Enabled. . . . . . . . : Unknown"
print " WINS Proxy Enabled. . . . . . . . : No"
print " DNS Suffix Search List. . . . . . :", domain.strip(",").strip(), "\n"

for interface in iflist:
if interface[0:2] == "lo":
pass
elif interface[0:3] == "sit":
pass
else:
ipaddress = ipdict[interface][0][0]
subnetmask = ipdict[interface][0][1]
if routedict["default"][2] == interface:
defaultgateway = routedict["default"][0]
else:
defaultgateway = ""

print "Ethernet adapter", interface, ":\n"
print " Connection-specific DNS Suffix . :", domain.strip(",").strip()
print " Description . . . . . . . . . . . :"
print " Physical Address. . . . . . . . . :", macdict[interface]
print " Dhcp Enabled. . . . . . . . . . . : Unknown"
print " Autoconfiguration Enabled . . . . : Unknown"
print " IP Address. . . . . . . . . . . . :", ipaddress
print " Subnet Mask . . . . . . . . . . . :", subnetmask
print " Default Gateway . . . . . . . . . :", defaultgateway
print " DHCP Server . . . . . . . . . . . : Unknown"
if len(dns) > 1:
dns[0][0] = " DNS Servers . . . . . . . . . . . :"
for item in dns:
print item[0], item[1]
print
else:
domain = ""
for item in domainlist:
domain = domain + ", " + item
for interface in iflist:
if interface[0:2] == "lo":
pass
elif interface[0:3] == "sit":
pass
else:
ipaddress = ipdict[interface][0][0]
subnetmask = ipdict[interface][0][1]
if routedict["default"][2] == interface:
defaultgateway = routedict["default"][0]
else:
defaultgateway = ""

print "\nEthernet adapter", interface, ":\n"
print " Connection-specific DNS Suffix . :", domain.strip(",").strip()
print " IP Address. . . . . . . . . . . . :", ipaddress
print " Subnet Mask . . . . . . . . . . . :", subnetmask
print " Default Gateway . . . . . . . . . :", defaultgateway
print

def usage():
print "\nipconfig [Options]\n"
print " Options:"
print " -a | --all = Display full configuration information."
print " -b | --basic = Display basic configuration information. (default)"
print " --release = Release the IP address for all interfaces."
print " -r | --renew = Renew the IP address for all interfaces."
print " -n | --network = Restarts the Network Daemon."
print " -f | --flushdns = Purges the DNS Resolver cache by restarting the NSCD Daemon."
print " -h, --help = Show this help."
print " -v, --version = Output version.\n"
print " The default is to display only the IP address, subnet mask and default gateway "
print " for each adapter bound to TCP/IP.\n"
print " Examples:"
print " > ipconfig ... Show basic information."
print " > ipconfig /all ... Show detailed information"
print " > ipconfig /renew ... renew all adapters"
print " > ipconfig /release ... release all adapters\n"

def showversion():
print "\nGNU ipconfig", version, "\n"
print "This program is distributed in the hope that it will be useful,"
print "but WITHOUT ANY WARRANTY; without even the implied warranty of"
print "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"
print "GNU General Public License for more details.\n"
print "Originally written by Bob Brandt <projects@brandt.ie>.\n"

try:
opts, args = getopt.getopt(sys.argv[1:], "abrnf?hv", ["all", "basic", "renew", "network", "flushdns", "help", "version", "release"])
except getopt.GetoptError:
usage()
sys.exit(2)

for opt, arg in opts:
if opt in ["-a", "--all"]:
printinfo("all")
sys.exit()
elif opt in ["-b", "--basic"]:
printinfo("basic")
sys.exit()
elif opt in ["--release"]:
releaseDHCP()
sys.exit()
elif opt in ["-r", "--renew"]:
renewDHCP()
sys.exit()
elif opt in ["-n", "--network"]:
restartNetwork()
sys.exit()
elif opt in ["-f", "--flushdns"]:
flushDNS()
sys.exit()
elif opt in ["-?", "-h", "--help"]:
usage()
sys.exit()
elif opt in ["-v", "--version"]:
showversion()
sys.exit()

printinfo()
sys.exit()

(:title ipconfig.py :)

This was a small little project I started to replicate the ipconfig command from windows in linux. In retrospect, this command is not that useful as the standard linux commands are more useful, but it was a good programming exercise.

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