Please don't use the driver to do this kind of thing, everything you want to do
can be done using iptables. In fact I would suggest that you simply use squid
and NAT to provide the services you mention.
Jesse
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of zheng yong
Sent: Tuesday, July 08, 2008 6:24 AM
To: [email protected]; Linux NICS
Subject: [E1000-devel] I want to transfer packet in e1000 driver,how?
Hi everybody!
I have a linux(Fedora 9) machine with two net
cards,one card for outer connection with internet,and
another for inner connection to intranet.
I will let only tcp packet with a port 80 pass from
outer to inner and from inner to outer.
To ease,I want to edit the e1000 driver,transfer ARP
packets and some TCP packets.
Here are what I have done:
1. declare two static struct net_device *
varibles,named kdn_e1000_outer and kdn_e1000_inner
2. in function e1000_probe, initialize the two
varibles.
3. write a function deal packet:
static boolean_t kdn_e1000_deal_packet(struct
net_device *netdev, struct sk_buff *skb);
4. in function e1000_clean_rx_irq and
e1000_clean_rx_irq_ps, I substitute the call to
netif_rx and netif_recieve_skb with
kdn_e1000_deal_packet
and then,here is the questions:
1.before I call e1000_xmit_frame, what should I do
with the skb?
if it is a ARP req or resp, I substitute the mac in
ethernet header and the mac in arp content.
if it is a tcp packet, I substitute the mac in
ethernet header.
Are there any else?
2.while the struct net_device *netdev in function
e1000_clean_rx_irq and e1000_clean_rx_irq_ps has
unstable field perm_addr? It should be fixed for one
net card,isn't it?
3.why is the arp packet I received wrong, I mean it is
not the same with the one sent.
for example:
arp sent has content:
00:0D:60:66:12:69 192.168.111.2 00:00:00:00:00
192.168.111.1
while the one received has content:
FF:FF:FF:FF:FF:FF 192.168.111.2
00:0D:60:66:12:69 192.168.111.1
it is wild.
I am longing for the answers,thank you for all.
here is the source code e1000_main.c in accessory
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