Hi :
I use latest LWIP1.4.x from git repo, and found that the problem of receive
speed down after sending file 3 times.
My code is pasted as following .
My system is FreeRTOS + lwip, I think it may be lwip bug
static void close_conn(struct tcp_pcb *pcb)
{
tcp_arg(pcb, NULL);
tcp_sent(pcb, NULL);
tcp_recv(pcb, NULL);
tcp_close(pcb);
}
static err_t server_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t
err)
{
if (err == ERR_OK && p != NULL)
{
tcp_recved(pcb, tot_len);
pbuf_free(p);
}
if (err == ERR_OK && p == NULL) {
close_conn(pcb);
}
return ERR_OK;
}
static err_t server_accept(void *arg, struct tcp_pcb *pcb, err_t err){
LWIP_UNUSED_ARG(arg);
LWIP_UNUSED_ARG(err);
tcp_recv(pcb, server_recv);
tcp_err(pcb, NULL);
tcp_sent(pcb, NULL);
tcp_poll(pcb, NULL, 0);
return ERR_OK;
}
static void server_init(void)
{
struct tcp_pcb *pcb;
pcb = tcp_new();
tcp_bind(pcb, IP_ADDR_ANY, 8081);
pcb = tcp_listen(pcb);
tcp_accept(pcb, server_accept);
for (;;)
{
vTaskDelay(50);
}
}
From: [email protected]
[mailto:[email protected]] On Behalf Of
Bill Auerbach
Sent: 2012年4月13日 22:16
To: 'Mailing list for lwIP users'
Subject: Re: [lwip-users] tcp_sndbuf return 0 when sending file
>I use LWIP 1.3.2, after server receive a lot of data packet from client for a
>while .
>The system performance is lower, anyone know how to perfact it ?
I would use lwIP 1.4.1. Why spend all this time developing and testing on
something already out of date with known problems fixed in later versions?
Bill
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