Re： Re: Re： Re: [lwip-users] Can't send the data by Raw API

[陳 小擁]

Thanks for your help, i will try it again . address@hidden is my MSN , hope to make friend with you .

 

 

Sathya Thammanur <address@hidden> 說：

Take a look at the doc/rawapi.txt document in the lwip installation area. This has all the functions that you would need for writing TCP and UDP applications.
Here is a snippet of a function that sends data.

  err_t err = ERR_OK;
  u16_t len;

  /* We cannot send more data than space available in the send
     buffer. */    
  if (tcp_sndbuf(pcb) < ps->left) {
    len = tcp_sndbuf(pcb);
  } else {
    len = ps->left;
  }

  if (len > 0) {
    err = tcp_write(pcb, ps->buf_p, len, 1);
  }

Sathya

 

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