def payload_is_accepted(self, packet):
seq_lo, seq_hi = packet.get_seq_interval()
first_byte, last_byte = seq_lo, seq_hi - 1
first_ok = SequenceNumber.a_leq_b_leq_c(self.rcv_nxt, first_byte,
self.rcv_nxt + self.rcv_wnd)
last_ok = SequenceNumber.a_leq_b_leq_c(self.rcv_nxt, last_byte,
self.rcv_nxt + self.rcv_wnd)
return last_byte >= first_byte and (first_ok or last_ok)
def payload_is_accepted(self, packet):
seq_lo, seq_hi = packet.get_seq_interval()
first_byte, last_byte = seq_lo, seq_hi-1
first_ok = SequenceNumber.a_leq_b_leq_c(self.rcv_nxt,
first_byte,
self.rcv_nxt+self.rcv_wnd)
last_ok = SequenceNumber.a_leq_b_leq_c(self.rcv_nxt, last_byte,
self.rcv_nxt+self.rcv_wnd)
return last_byte >= first_byte and (first_ok or last_ok)
def usable_window_size(self):
upper_limit = self.snd_una + self.snd_wnd
# If the upper window limit is below SND_NXT, we must return 0.
if SequenceNumber.a_leq_b_leq_c(self.snd_una, self.snd_nxt,
upper_limit):
return upper_limit - self.snd_nxt
else:
# TODO: add test!
return 0
def usable_window_size(self):
upper_limit = self.snd_una + self.snd_wnd
# Si el límite superior de la ventana está por debajo de SND_NXT,
# tenemos que devolver 0.
if SequenceNumber.a_leq_b_leq_c(self.snd_una, self.snd_nxt,
upper_limit):
return upper_limit - self.snd_nxt
else:
# TODO: agregar test!
return 0
def should_update_window(self, ack_number):
# TODO: agregar tests para esto.
# RFC 1122, p.94 (corrección al RFC 793).
return SequenceNumber.a_leq_b_leq_c(self.snd_una, ack_number,
self.snd_nxt)
def ack_covers_tracked_packet(self, ack_number):
iss = self.protocol.iss
seq_number = self.tracked_packet.get_seq_number()
return SequenceNumber.a_leq_b_leq_c(iss, seq_number, ack_number)
def should_update_window(self, ack_number):
# TODO: agregar tests para esto.
# RFC 1122, p.94 (corrección al RFC 793).
return SequenceNumber.a_leq_b_leq_c(self.snd_una, ack_number,
self.snd_nxt)
def should_update_window(self, ack_number):
# TODO: add tests for this.
# RFC 1122, p.94 (correction to RFC 793).
return SequenceNumber.a_leq_b_leq_c(self.snd_una, ack_number,
self.snd_nxt)
def ack_covers_tracked_packet(self, ack_number):
iss = self.protocol.iss
seq_number = self.tracked_packet.get_seq_number()
return SequenceNumber.a_leq_b_leq_c(iss, seq_number, ack_number)