def generatePackets(self, plaintext):
pt = bytearray(plaintext)
packets = []
for i in range(len(pt)):
if i % 252 == 0:
packet = Packet()
packets.append(packet)
packet.seqCount = self.SCA
self.SCA = self.SCA + 1
packet.append(pt[i])
self.applyPadding(packets[-1])
return packets
def header_to_host_byte_ord(packet_bytearray, header_dict):
"""Takes a bytearray and a header_dict. Assumes the
begining of packet_bytearray is a header in network
byte order. Returns a bytearray representing a
header in host order."""
header_len = sum(bit_len for bit_len, _ in header_dict.values())
header_len_bytes = math.ceil(header_len / BYTE_LEN)
pkt_net = Packet(header_len, packet_bytearray[:header_len_bytes])
pkt_host = Packet(header_len)
l_bit = 0
r_bit = 0
for bit_len, _ in header_dict.values():
r_bit += bit_len
value = pkt_net.get_from_bits(l_bit, r_bit)
value = network_to_host(bit_len, value)
pkt_host.append(value, bit_len)
l_bit = r_bit + 1
return pkt_host.get_bytearray()
