Hi, Anybody my problem following? Thanks.
Is there any format requirement on the pbuf which will be sent by UDP_Send() ? As the netconn_send() works properly while the UDP_Send() not........ :-( When using raw API, after called UDP_Send, lwIP can send ARP to get the dest MAC address successfully, but then, there's no UDP packet actually sent out.... regards Ming -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of 'ZENG Ming' Sent: Sunday, November 06, 2005 4:28 PM To: [email protected] Subject: [lwip-users] Problem in UDP send Hi all, I'm trying to test throughput with UDP protocol. And got something wrong with RAW API, while the Sequence API (netconn_*)worked fine. I'm using current CVS version of lwIP, and the problem always existed no matter enable ARP_QUEUEING or not. With following function, I only got 2000 ARP requests ( with 2000 ARP replies ), but no UDP packet was sent out. //------------------------------------------ void udp_test_Raw(void) { struct ip_addr ipaddr; struct udp_pcb *pcb; struct pbuf *pb; INT16U i; char str[1400]="1234567890"; IP4_ADDR(&ipaddr, 192,168,11,120); pcb = udp_new(); udp_connect(pcb, &ipaddr, 12024); pb = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); pb->payload = str; pb->len = pb->tot_len = 1400; for (i=0;i<2000;i++) udp_send(pcb, pb); pbuf_free(pb); udp_remove(pcb); } //--------------------------------- I've also tried to use sequence API as following, and it worked properly. One ARP was sent first, and then 1999 UDP packets. ( If ARP_QUEUEING enabled, 2000 UDP packets were sent. ) //********************************* void udp_test_Sequence(void) { struct ip_addr ipaddr; struct netconn *conn; struct netbuf *nb; INT16U i; char str[1400]="1234567890"; IP4_ADDR(&ipaddr, 192,168,11,120); conn = netconn_new(NETCONN_UDP); netconn_connect(conn, &ipaddr, 12024); nb = netbuf_new(); netbuf_ref(nb,str,1400); for (i=0;i<2000;i++) netconn_send(conn, nb); netconn_close(conn); netbuf_free(nb); netbuf_delete(nb); netconn_delete(conn); } //********************************** Have I done anything wrong? Especially about how to use UDP raw API..... -- ************************************************************************ ******** Zeng, Ming NIKHEF, Kruislaan 409 1098 SJ Amsterdam - The Netherlands email: [EMAIL PROTECTED] Tel. 31 (0)20 592 2147 Mobile 31 (0)6 4351 5283 ************************************************************************ ******** _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
