Re:RE : [lwip-users] Ping target ip address with a packet data big than

Thanks for your reply,
my target board just set up a netif with ip adress 192.168.2.13, then,PC ping target board with command:

ping 192.168.2.13 -l 1400

lwip debug imformation is:

pbuf_alloc(length=1442)
pbuf_alloc: allocated pbuf 00209568
pbuf_alloc(length=1442) == 00209568
tcpip_thread: PACKET 00208400
etharp_ip_input: updating ETHARP table.
update_arp_entry()
update_arp_entry: 192.168.2.164 - 00:19:db:56:f1:83
update_arp_entry: updating stable entry 1
pbuf_header: old 00209578 new 00209586 (-14)
ip_input: iphdr->dest 0xd02a8c0 netif->ip_addr 0xd02a8c0 (0x2a8c0,

0x2a8c0, 0xd000000)
ip_input: packet accepted on interface en
ip_input:
IP header:
+-------------------------------+
| 4 | 5 | 0x00 |      1428     | (v, hl, tos, len)
+-------------------------------+
|    55086      |000|       0   | (id, flags, offset)
+-------------------------------+
|   64 |    1 |    0x1839     | (ttl, proto, chksum)
+-------------------------------+
| 192 | 168 |    2 | 164 | (src)
+-------------------------------+
| 192 | 168 |    2 |   13 | (dest)
+-------------------------------+
ip_input: p->len 114 p->tot_len 1428
pbuf_header: old 00209586 new 0020959a (-20)
icmp_input: ping
pbuf_header: old 0020959a new 00209578 (34)
pbuf_header: old 00209578 new 0020959a (-34)
pbuf_header: old 0020959a new 00209586 (20)
ip_output_if: en0
IP header:
+-------------------------------+
| 4 | 5 | 0x00 |      1428     | (v, hl, tos, len)
+-------------------------------+
|    55086      |000|       0   | (id, flags, offset)
+-------------------------------+
| 255 |    1 |    0x5938     | (ttl, proto, chksum)
+-------------------------------+
| 192 | 168 |    2 |   13 | (src)
+-------------------------------+
| 192 | 168 |    2 | 164 | (dest)
+-------------------------------+
netif->output()pbuf_header: old 00209586 new 00209578 (14)
etharp_query: sending packet 00209568
pbuf_free(00209568)
pbuf_free: deallocating 00209568
pbuf_free: deallocating 00209644
pbuf_free: deallocating 00209720
pbuf_free: deallocating 002097fc
pbuf_free: deallocating 002098d8
pbuf_free: deallocating 002099b4
pbuf_free: deallocating 00209a90
pbuf_free: deallocating 00209b6c
pbuf_free: deallocating 00209c48
pbuf_free: deallocating 00209d24
pbuf_free: deallocating 00209e00
pbuf_free: deallocating 00209edc

ping 192.168.2.13 -l 1500

debug information is:

pbuf_alloc(length=1514)
pbuf_alloc: allocated pbuf 00209e00
pbuf_alloc(length=1514) == 00209e00
pbuf_alloc(length=62)
pbuf_alloc: allocated pbuf 0020948c
pbuf_alloc(length=62) == 0020948c
tcpip_thread: PACKET 002083c0
etharp_ip_input: updating ETHARP table.
update_arp_entry()
update_arp_entry: 192.168.2.164 - 00:19:db:56:f1:83
update_arp_entry: updating stable entry 1
pbuf_header: old 00209e10 new 00209e1e (-14)

then, it doesn't works!

Thank you to report these little problems. I just fix 1), 2) and 3).

About 4), when you said a "1500 data packet", do you talk about the ICMP payload, or the whole frame ? (perhaps post a capture file to be sure).

I remember there was a change on ICMP processing for such case. I will take a look this evening...

====================================
Frédéric BERNON
HYMATOM SA
Chef de projet informatique
Microsoft Certified Professional
Tél. : +33 (0)4-67-87-61-10
Fax. : +33 (0)4-67-70-85-44
Email : address@hiddenr
Web Site : http://www.hymatom.fr
====================================

P Avant d'imprimer, penser à l'environnement

First of all, I am sorry to tell you my poor English skills.

Therefore, if the _expression_ unclear where to pay more attention to understanding.

I'm using lwip with cvs head updated daily, and I have some some issues of concern:

1)、File init.c line 100-105, it lost two ", but it hasn't any error or warning when

compiler.

2)、File init.c line 124, it uses DHCP_AUTOIP_COOP, maybe it is a error, I change it

with LWIP_DHCP_AUTOIP_COOP.

3)、File init.c line 143, it uses LWIP_PPP, but not define anywhere. I change it with

PPP_SUPPORT.

4)、When I ping target with a 1500-data packet, lwip then dies and doesn't work anymore.

Thanks.

From:	linux9527
Subject:	Re:RE : [lwip-users] Ping target ip address with a packet data big than 1500
Date:	Fri, 23 Nov 2007 11:27:08 +0800 (CST)