Re: [lwip-devel] lwip FTP - TCP - packets problem

[goldsimon]

I guess your problem most probably comes from wrong API usage. For threaded 
programming, you cannot use the raw API. We really need documentation that 
people do read...

Simon



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Am 18. Juli 2016 5:29:30 nachm. schrieb A480G <address@hidden>:

> Hello Sergio,
>
> Sorry for using the wrong list, I'll make sure for future I'll post there.
> A bit late answer to your question, I hope that not going to be a problem.
> Ok, I have mentioned already what is my problem, transferring large file
> with a FTP. The board that I'm using is a SAM4E-Ek by Atmel, ans I'm using a
> RTOS I think that will be good to know.
>
>   *static void ftpd_send_file(struct ftpd_datastate *fsd, struct tcp_pcb
> *pcb)
> {
>         
>
>         u16_t count;
>         UINT read;
>         if (!fsd->connected)
>         {
>                 return;
>         }
>                 
>         do {
>         if(tcp_sndqueuelen(pcb)>0) {
>                 tcp_output(pcb);
>         }
>         
>         if(fsd->buf) {
>                 if(!fsd->filepos)
>                         count = tcp_mss(pcb); // maximum data that can be 
> transmitted 1460
>                 else
>                         count = fsd->buf_size;
>         } else {
>                 return;
>         }
>                 if(count > tcp_sndbuf(pcb)) count = tcp_sndbuf(pcb);
>
>                 f_read(fsd->fil, fsd->buf, count, &read);
>                 fsd->filepos += read;
>                 if(read > 0) {
>                 ftpd_data_write(pcb, fsd->buf, (u16_t *)&read, 0);
>                 tcp_output(pcb);
> //              if(f_size(fsd->fil) > fsd->filepos)
> //                      return;
>                 }
>         
>         } while (f_size(fsd->fil) > fsd->filepos);
>
>         
>         struct ftpd_msgstate *fsm;
>         struct tcp_pcb *msgpcb;
>         fsm = fsd->msgfs;
>         msgpcb = fsd->msgpcb;
>         f_close(fsd->fil);
>         mem_free(fsd->fil);
>         fsd->fil = NULL;
>         ftpd_close_data_conn(pcb, fsd);
>         fsm->datapcb = NULL;
>         ftpd_data_state_free(fsm->datafs);
>         fsm->state = FTPD_IDLE;
>         send_msg(msgpcb, fsm, msg226);
> }*
>
> above is my function where I try to loop a file and send packets via
> *ftpd_data_write*
>
> static err_t ftpd_data_write(struct tcp_pcb *pcb, const void* ptr, u16_t
> *length, u8_t apiflags)
> {
>         int vurti;
>         u16_t len;
>         err_t err;
>         LWIP_ASSERT("length != NULL", length != NULL);
>         len = *length;
>         do {
>                 //LWIP_DEBUGF1(FTPD_DEBUG | LWIP_DBG_TRACE, ("ftpd-data: 
> Sending %d
> bytes\n", len));
>                 err = tcp_write(pcb, ptr, len, apiflags);
>                 if (err == ERR_MEM) {
>                         if ((tcp_sndbuf(pcb) == 0) ||
>                         (pcb->snd_queuelen >= TCP_SND_QUEUELEN)) {
>                                 /* no need to try smaller sizes */
>                                 len = 1;
>                                 } else {
>                                 len /= 2;
>                         }
>                 }
>         } while ((err == ERR_MEM) && (len > 1));
>
>         *length = len;
>         return err;
> }
>
> This is the approach that I'm trying to use to send packets, but
> unfortunately after the the 3 hand handshake of the tcp I'm not receiving
> any packets !!!!!
>
> I was wondering if I need to use sockets, for the purpose?!
>
> Thanks
>
>
>
>
> --
> View this message in context: 
> http://lwip.100.n7.nabble.com/lwip-FTP-TCP-packets-problem-tp26802p26816.html
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>
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