Networking workbook in py

network.py

# Import socket library
import socket
# Import hexlify for ip address conversion
from binascii import hexlify
# Use NTP protocol
import ntplib
from time import ctime

# Print hostname
hostname = socket.gethostname()
print "Hostname %s" % hostname

# Print IP address
ip_address = socket.gethostbyname(hostname)
print "Your IP address: %s" % ip_address

# Wrap this into function
def print_hostname():
	hostname = socket.gethostname()
	ip_address = socket.gethostbyname(hostname)

	print "Hostname: %s" % hostname
	print "Your IP address: %s" % ip_address

# Find IP address of remote machine
def find_ip_address():
	remote_host = 'www.dropsql.com'
	print "IP address of %s: %s" %(remote_host, socket.gethostbyname(remote_host))

# Convert IP address
def ip_address_convert():
	remote_host = 'www.dropsql.com'
	ip_address = socket.gethostbyname(remote_host)
	# Convert address to 32 bit binary format
	packed = socket.inet_aton(ip_address)
	# Convert a 32-bit packed IPv4 address to dotted notation
	unpacked = socket.inet_ntoa(packed)
	print "Converted IP address: Packed - %s | Unpacked - %s" %(hexlify(packed), unpacked) 

# Find services on ports
def service_on_ports():
	protocol = 'tcp'
	for port in [25, 80, 21]:
		print "On port %s is service %s" %(port, socket.getservbyport(port, protocol))

# Contact NTP servers to fetch current time
def ntp():
	# Create NTP client
	client = ntplib.NTPClient()
	response = client.request('0.hr.pool.ntp.org')
	print ctime(response.tx_time)