Re: [lwip-users] TFTP init

[nrichard]

Ajay Bhargav wrote
> I am using this FTP server on two of my devices (ARM board and ESP8266)
> and it works perfectly fine. Can you enable FTP debug prints and see where
> exactly it is failing?
> 
> Regards,
> Ajay Bhargav

I turned on TCP as well as FTP debugging, and low and behold, it tells me
I'm out of memory...

/TCP header:
+-------------------------------+
|    22271      |       21      | (src port, dest port)
+-------------------------------+
|           0032031823          | (seq no)
+-------------------------------+
|           0000000000          | (ack no)
+-------------------------------+
|  8 |   |000010|      8192     | (hdrlen, flags (SYN), win)
+-------------------------------+
|    0xe60a     |         0     | (chksum, urgp)
+-------------------------------+
tcp_input: packed for LISTENing connection.
TCP connection request 22271 -> 21.
tcp_parseopt: MSS
tcp_parseopt: NOP
tcp_parseopt: other
tcp_parseopt: NOP
tcp_parseopt: NOP
tcp_parseopt: other
tcp_enqueue_flags: queuelen: 0
tcp_enqueue_flags: queueing 6510:6511 (0x12)
tcp_enqueue_flags: 1 (after enqueued)
tcp_output: snd_wnd 8192, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510
tcp_output: snd_wnd 8192, cwnd 1, wnd 1, effwnd 0, seq 6510, ack 6510, i 0
tcp_output_segment: rtseq 6510
tcp_output_segment: 6510:6510
TCP header:
+-------------------------------+
|    22271      |       21      | (src port, dest port)
+-------------------------------+
|           0032031824          | (seq no)
+-------------------------------+
|           0000006511          | (ack no)
+-------------------------------+
|  5 |   |010000|      8192     | (hdrlen, flags (ACK), win)
+-------------------------------+
|    0x0d59     |         0     | (chksum, urgp)
+-------------------------------+
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: SYN_RCVD
TCP connection established 22271 -> 21.
ftpd_msgaccept: Out of memory
tcp_pcb_purge
tcp_pcb_purge: data left on ->unacked
tcp_abandon: sending RST
tcp_rst: seqno 6511 ackno 32031824.
tcp_slowtmr: no active pcbs/

I'm trying to get this working on an ARM board as well, a Sam4e.  Not to get
into too much detail because this is an LWIP mailing list, not an ARM
mailing list, but I imported the FatFs module from the ASF Wizard and used
an example to replicate the FatFs setup.  Seems like one of the #defines
they have me do, "VMEM_NB_SECTOR" determines whether I have enough memory or
not.  The example wants me to set it at 128, whereas the default was 8. At
128 FatFs creates, writes, and reads a file, anything below 128 and FatFs
does not work, however FTP connects but can't do any operations (I get FTP
server error messages).



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