Simon Goldschmidt schrieb:
You did the correct thing, tcp_sent should do the trick. If not,
that's a bug (either in lwIP, the way you are using it, or in your
code or port) which needs to be analysed.
I have expanded the httpserver_raw from the contribs. The basic
functions are alike. In http_recv() I collect all incomming packets and
process them. if afterwards there is a file to be sent I do this:
if (hs->file==NULL) {
close_conn(pcb, hs);
} else {
/* Tell TCP that we wish be to informed of data that has been
successfully sent by a call to the http_sent() function. */
tcp_sent(pcb, http_sent);
// send_data(pcb, hs);
send_head(pcb, hs);
}
send_head() is like send_data() and sends the header in a separate packet:
static void send_head(struct tcp_pcb *pcb, struct http_state *hs){
err_t err;
u16_t len;
/* We cannot send more data than space available in the send
buffer. */
if (tcp_sndbuf(pcb) < hs->file_head_len) {
LWIP_ERROR("send_head: HTTP header to big!",1,;);
} else {
len = hs->file_head_len;
}
do {
err = tcp_write(pcb, hs->file_head, len, 0);
if (err == ERR_MEM) {
len /= 2;
}
} while (err == ERR_MEM && len > 1);
}
This is my http_sent function:
static err_t http_sent(void *arg, struct tcp_pcb *pcb, u16_t len){
struct http_state *hs;
LWIP_UNUSED_ARG(len);
hs = arg;
hs->retries = 0;
if (hs->left > 0) {
send_data(pcb, hs);
} else {
close_conn(pcb, hs);
if (send_qyb==1) {
send_qyb=0;
// This is what erases the data in the last packet
// clear_audio_vars();
// irq_stop3=0;
}
}
return ERR_OK;
}
I would be glad for any pointers how to trace this problem.
TIA
Gustl
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