# Utility to make a clean list of IP objects from
# the dirty string of IP addresses
# SO DIRTY
def make_ip_list(ip_range_list):
    pattern = re.compile(r"\d+\.\d+\.\d+\.\d+")
    for i in range(len(ip_range_list)):
        ip_range_list[i] = IP(pattern.search(ip_range_list[i]).group(0))
#        print ip_range_list[i]
    return ip_range_list

# Utility to find router ID for an arbitrary IP address
# Handy!
def router_id_from_ip(ip_list, ip_addr):
    return bisect.bisect_left(ip_list, ip_addr)

# Makes a 2D array for the routing table
# It is flipped about the diagonal from how
# one would initially think of it from the string
def make_routing_table(id_list, dimension):
    routing_table = []
    for i in range(dimension):
        routing_table.append([])
        for j in range(dimension):
            routing_table[i].append(id_list.pop(0))
    return routing_table

# Utility to look at the routing table
# and make sure its not malformed
def print_routing_table(routing_table):
    for i in range(len(routing_table)):
        for j in range(len(routing_table)):
            sys.stdout.write(routing_table[i][j])
            sys.stdout.write(" ")
        sys.stdout.write("\n")

# Utility func... wait.
def main():
    sockets = []
    for i in range(5):
        sockets.append(socket.socket(AF_INET, SOCK_STREAM))
        try:
            sockets[i].connect(('dio.cs.umn.edu',5001))
        except socket.error, msg:
            sockets[i].close()
            print 'Could not open socket'
            print str(msg)
            sys.exit(1)
#        sockets[i].settimeout(0.1) #Non-block for the win