Hello arvind, Thanks. I did a silly mistake. regards, cranium. >> Hello Sandeep, >> I changed printk to > >>printk(KERN_DEBUG "ICMP cksum=%d,& IP >>cksum=%d\n",(unsigned short >>)sb->h.icmph->checksum,(unsigned short >>)sb->nh.iph->check); > >>but still getting errors. does that mean accessing >>directly in skbuff is not allowed? > >Just include "linux/icmp.h" and it should compile. > >- Arvind. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/