Hi Olle, Thanks for your comments. Well, actually I am working on IPv6 packets. I used tcpdump along the route, seems okay. The packets did actually arrive at the other host. However, it failed the checksum. Eg. icmp or udp checksum. I only changed the addr in the skbuff header and didn't do anything with skb->dst. Should I change that too? Well, I did meddle with that as well. However, it seems to have pretty weird effect on the neighbour discovery table for both cases. Arghh.... -----Original Message----- From: kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org] On Behalf Of Olle Ollesson Sent: Monday, May 27, 2002 4:03 PM To: kernelnewbies@nl.linux.org Cc: Jonathan Khoo Subject: Re: changing ip addr of skbuff You can look at the second part of one of my older (14 May 2002, Subject: Big/Little-endian confusion) posting to this list about my problems when changing the IP addr in an sk_buff. Maybe your problem is related to this. It may be, that when you change the IP addr, you actually change the two last octets of the IP addr and the two following octets. To rule out that this is the problem, ensure that the IP addr is changed correctly in the sk_buff sent out. I used a network sniffer on another computer in the network to do this. I haven't yet been able to find an explanation about what causes this. / h_e_w_i --- Jonathan Khoo <jonath-k@is.aist-nara.ac.jp> wrote: > Hi guys, > > I changed the ip addr of the skbuff before it was > being sent to the > network device driver. However, I got checksum error > when the other side > received it. I did convert the addr back to the > original addr before > doing checksum. Why did I get the checksum error? Is > there anything that > I miss out? > > Thanks for any advices. > jon > > > -- > Kernelnewbies: Help each other learn about the Linux > kernel. > Archive: > http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
