URL:
<http://savannah.gnu.org/support/?106914>
Summary: what's wrong with my lwip-raw api udp_send design?
Project: Savannah Administration
Submitted by: the_gadfly
Submitted on: Thu Jun 25 12:47:25 2009
Category: None
Priority: 5 - Normal
Severity: 3 - Normal
Status: None
Assigned to: None
Originator Email: the_gad...@163.com
Operating System: None
Open/Closed: Open
Discussion Lock: Any
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Details:
Hi :
I am a new guy to lwip ,and when i use udp to my design .i hit a big
broblem.After seaching a long time,it is still here .
I cant receive any udp message at all ,i hope you could help me
here is my code ,can you see some incorrect things?
thank you
the_gadfly
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#include "system.h"
#include "lwip/debug.h"
#include "lwip/stats.h"
#include "arch/init.h"
#include "lwip/ip_addr.h"
#include "lwip/tcpip.h"
#include "lwip/netif.h"
#include "netif/lan91c111if.h"
#include "lwip/udp.h"
#include
#include "httpd.h"
#include "sys/alt_alarm.h"
#define get_milliseconds() alt_nticks()
int n;
/* ---------- IP oriented addresses for ethernet adapter ---------- */
#define IPADDR0 10
#define IPADDR1 1
#define IPADDR2 1
#define IPADDR3 51
#define NETMASK0 255
#define NETMASK1 255
#define NETMASK2 255
#define NETMASK3 0
#define GWADDR0 10
#define GWADDR1 1
#define GWADDR2 1
#define GWADDR3 2
void httpd_init(void)
{ char Test[]="hello world !";
struct udp_pcb *pcb;
struct ip_addr ipaddr;
struct pbuf *p;
err_t err;
IP4_ADDR(&ipaddr,10,1,1,52);
p = pbuf_alloc(PBUF_RAW,15,PBUF_RAM);
p->payload=(void *)Test;
p->len=p->tot_len=15;
pcb = udp_new();
err=udp_bind(pcb, IP_ADDR_ANY, 30);
printf("err= %s",err);
err=udp_connect(pcb,&ipaddr,30);
printf("err= %s",err);
err=udp_send(pcb,p);
printf("err= %s",err);
pbuf_free(p);
udp_remove( pcb );
}
int main(void)
{
//0.6.4 struct netif *netif;
struct netif netif;
struct ip_addr ipaddr, netmask, gw;
unsigned int now, lasttime;
int i;
#if IP_REASSEMBLY
int j;
#endif
alt_avalon_lan91c111_if* dev_list_ptr =
(alt_avalon_lan91c111_if*)alt_ethernet_device_list.next;
printf("Example web server using Light-weight IP (LWIP)\n");
printf("and simple RAM-based file system.\n\n");
/*
* Initialize lwip
*/
lwip_init();
printf ("Setting IP address to: %d.%d.%d.%d\n", IPADDR0, IPADDR1,
IPADDR2,
IPADDR3);
printf ("Setting netmask to: %d.%d.%d.%d\n", NETMASK0, NETMASK1,
NETMASK2,
NETMASK3);
printf ("Setting gateway address to: %d.%d.%d.%d\n", GWADDR0, GWADDR1,
GWADDR2, GWADDR3);
IP4_ADDR(&ipaddr, IPADDR0, IPADDR1, IPADDR2, IPADDR3);
IP4_ADDR(&netmask, NETMASK0, NETMASK1, NETMASK2, NETMASK3);
IP4_ADDR(&gw, GWADDR0, GWADDR1, GWADDR2, GWADDR3);
//0.6.4 netif = netif_add(&ipaddr, &netmask, &gw,
netif_add(&netif, &ipaddr, &netmask, &gw,
(void*)dev_list_ptr,
lan91c111if_init,
ip_input);
//0.6.4 netif_set_default(&netif);
netif_set_default(&netif);
/*
* Initialize application(s)
*/
httpd_init();
//udp_echo_init();
/* main loop to service the Ethernet device and expire TCP timers
*/
lasttime = get_milliseconds();
i=0;
#if IP_REASSEMBLY
j=0;
#endif
while(1)
{
//0.6.4 lan91c111if_service(netif);
lan91c111if_service(&netif);
now = get_milliseconds();
if (now - lasttime > TCP_TMR_INTERVAL) {
lasttime = now;
tcp_tmr();
if (++i==50) {
//etharp_tmr();
i=0;
}
}
#if IP_REASSEMBLY
if (++j==1000) {
ip_reass_timer();
j=0;
}
#endif
}
}
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