RE: [lwip-users] http_sent cb shows 1 byte trailer [RAW]

[Ben Hastings]

> I have not seen a single http_rcve() with pbuf=NULL yet.

We see it whenever a connection is closed, and use it to free the
tcp_arg:

static err_t http_recv_callback(void *arg, struct tcp_pcb *pcb, struct
pbuf *p, err_t err) {
  struct web_t *webdata = arg;
  if (err == ERR_OK) {
    if (p == NULL) {
      if (pcb->state == CLOSE_WAIT) {
        tcp_close(pcb); //received FIN, need to send FIN
      }
      tcp_arg(pcb, NULL);
      mem_free(webdata);
    } else { //p != NULL
      //actual http server code...

Ben