Hi I need to do a quick hack in the ethernet driver (3c59x.c), ie. to insert 4 bytes bewteen the ethernet header and the IP header. I save the packet then do skb_push, then copy the packet back into skb->data I tried the following: unsigned char temp_buf[2000]; unsigned char *temp_ptr; int temp_len, i; char *fourbytes = "abcd"; temp_ptr = skb->data; temp_len = skb->len; memcpy(temp_buf, skb->data, skb->len); skb_push(skb, 4) memcpy(temp_ptr, temp_buf, dev->hard_header_len); temp_ptr = skb->data + dev->hard_header_len; memcpy(temp_ptr, fourbytes, 4); temp_ptr += 4; memcpy(temp_ptr, temp_buf + dev->hard_header_len, temp_len - dev->hard_header_len); For some reason when I call skb_push(), the system hangs (kernel panic - Aiee killing interupt handler). What am I doing wrong? TIA Roger PS. I know I could do something similar using a raw ethernet socket from user space, but I need to do it in the driver because I want to operate on packets coming down through the stack. __________________________________________________ Do You Yahoo!? Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger http://im.yahoo.com - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
