I've hit a major wall while developing a small kernel module (2.6.18.8). Basically, my modules loads and handles ip protocol 253 (experimental). I have successfully received the socket buffer, read the contents and am now trying to turn it around and send back a reply. I'm not sure the proper method for this and am rather stuck. Any help would do. Here is a brief rundown: get skb (OK) read payload (OK) send back out----- skb->pkt_type = PACKET_OUTGOING; iph = skb->nh.iph; saddr = iph->saddr; daddr = iph->daddr; iph->saddr = daddr; iph->daddr = saddr; rt = (struct rtable *) skb->dst; eth = (struct ethhdr *)skb->mac.raw; memcpy(swap_mac,eth->h_dest,6); memcpy(eth->h_dest,eth->h_source,6); memcpy(eth->h_source,swap_mac,6); NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL,rt->u.dst.dev,dst_output); ----- This generates error: ip_rt_bug: a.b.c.d -> e.f.g.h, eth0 if, instead of sending to NF_HOOK I send directly to dev: dev_queue_xmit(skb_clone(skb, GFP_ATOMIC)); I get a buggy protocol error: protocol 0800 is buggy, dev eth0 A tcpdump shows that the packet is being generated but its being dropped before being sent out. I don't know how to figure out what to fix in my skb. Thanks, -dave -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
