Ubuntu高於8.04版本的源碼安裝drcom注意點，這裡借用別個的，我的早安裝好了，為了方便記憶，把別人的copy過來，方便找用源碼安裝drcom時候，make報錯，9.10和10.04都此問題。
/tmp/drcom/drcom.c: In function ‘build_ack_skb’:
/tmp/drcom/drcom.c:686: error: ‘struct sk_buff’ has no member named ‘dst’
/tmp/drcom/drcom.c: In function ‘build_auth_skb’:
/tmp/drcom/drcom.c:723: error: ‘struct sk_buff’ has no member named ‘dst’
make[3]: *** [/tmp/drcom/drcom.o] Error 1
make[2]: *** [_module_/tmp/drcom] Error 2
make[2]: Leaving directory `/usr/src/linux-headers-2.6.32-14-generic’
make[1]: *** [default] Error 2
make[1]: Leaving directory `/tmp/drcom’
Compile drcom kernel module failed!
解決方案：
編輯/kmod/drcom.c
查找__ip_select_ident(iph, skb->dst, 0);
改為 __ip_select_ident(iph, skb_dst(skb), 0);
Tip：一共有兩處需要修改，建議額外安裝dkms軟件包，sudo apt-get install dkms，這樣就不用每次更新內核後再手動編譯drcom了
