import socket
import datetime
import time
try:
    from hashlib import sha1
except ImportError:
    from sha import sha as sha1
import hmac

## nb;epochvalue;sq;hmac
## hmacfunc("nb;epochvalue;sq;", psk)
def nbsign(message=None, psk="netbeacon"):
    auth = hmac.new(psk, message, sha1)
    return auth.hexdigest()

# format: nb;1354687980;1;500f5e18df881bb1dd22ee3c468209669a13e4ef
def nbmessage(seq=1):
    m = ""
    m = m + "nb"
    m = m + ";"
    t = datetime.datetime.now()
    now = time.mktime(t.timetuple())
    m = m + (str(int(now)))
    m = m + ";"
    m = m + str(seq)
    m = m + ";"
    m = m + nbsign(message=m)
    return m

def nbsend(destination=None,payload=None, logging=False):
    if destination is None:
        return False
    if logging:
        print (payload)
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
    sock.sendto(payload, (destination, 12345))
    return True

for x in range(1,10):
    nbsend(destination="127.0.0.1", payload=nbmessage(x), logging=True)