[lwip-devel] [bug #51154] ABC (Appropriate Byte Counting) fails to work with TCP_WND set to maximum.

[Tim Cussins]

Follow-up Comment #4, bug #51154 (project lwip):

Hi Joel,

LWIP_WND_SCALE = 0 (default)
TCP_RCV_SCALE = 0 (default)
TCP_SND_BUF = TCP_WND = 64k-1

I'm not sure why I set TCP_SND_BUF to TCP_WND precisely.

And the pcb in stuck state: I'll just give you the whole struct :)

  local_ip = {
    addr = xxx :O
  },
  remote_ip = {
    addr = xxx :)
  },
  netif_idx = 0 '\000', 
  so_options = 4 '\004', 
  tos = 0 '\000', 
  ttl = 255 '\377', 
  next = 0x0 <>, 
  callback_arg = 0x362500, 
  state = ESTABLISHED, 
  prio = 64 '@', 
  local_port = 5002, 
  remote_port = 57240, 
  flags = 0, 
  polltmr = 1 '\001', 
  pollinterval = 2 '\002', 
  last_timer = 53 '5', 
  tmr = 7, 
  rcv_nxt = 3825489976, 
  rcv_wnd = 65535, 
  rcv_ann_wnd = 65535, 
  rcv_ann_right_edge = 3825555511, 
  rtime = -1, 
  mss = 1460, 
  rttest = 0, 
  rtseq = 2161524, 
  sa = 1, 
  sv = 3, 
  rto = 3, 
  nrtx = 0 '\000', 
  dupacks = 0 '\000', 
  lastack = 2165904, 
  cwnd = 1080, 
  ssthresh = 65535, 
  rto_end = 0, 
  snd_nxt = 2165904, 
  snd_wl1 = 3825489976, 
  snd_wl2 = 2165904, 
  snd_lbb = 2231439, 
  snd_wnd = 65535, 
  snd_wnd_max = 65535, 
  snd_buf = 0, 
  snd_queuelen = 45, 
  unsent_oversize = 165, 
  bytes_acked = 0, 
  unsent = 0x3620a0, 
  unacked = 0x0 <>, 
  ooseq = 0x0 <>, 
  refused_data = 0x0 <>, 
  listener = 0x34fea8, 
  sent = 0x1356ec <sent_tcp>, 
  recv = 0x1351f0 <recv_tcp>, 
  connected = 0x0 <>, 
  poll = 0x1350f0 <poll_tcp>, 
  errf = 0x135418 <err_tcp>, 
  keep_idle = 7200000, 
  persist_cnt = 0 '\000', 
  persist_backoff = 0 '\000', 
  persist_probe = 0 '\000', 
  keep_cnt_sent = 0 '\000'


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