i am implementing a virtual network device driver. I added my own header of 8 bytes after ip header. Then I am accessing udp header values source and dest(both ports). I used spinlock before accessing these two values(to avoid conccurent access to kerenl). But it is not receiving proper udp header ports. some times it is giving correct values and some times it is giving random values. Is there any way to access the header value? I am adding header by following code pskb_expand_head(skb,8,0,gfp_mask) ( i think it will take care of all ip, tcp header values properly) storing the values in the new 8 bytes. The following code i am using to access the code. spin_lock(&udp_lock) uh=skb->h.uh; sport=uh->source; dport=uh->dest; spin_lock(&udp_lock) thanks in advance phani -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
