Creating arp entry within stream module

HI all.
I'm tying to create an arp entry from within a stream modules stacked between eri and ip. My module is loaded on two interface (eri0 and eri1) and is use as a mangler for packet flowing through it. It take a packet on one interface do some processing on it if neccessary and put it on the other. My two interface are set in promiscious mode using dlpi promisc on message. This way the server become transparent to the network if placed in the critical path. My problem is the server must have only one ip address configured.
Ex:
Here there my two stream.
(1)
arp
ip -- 192.168.0.10
me
eri0
(2)
arp
ip -- 1.1.1.1
me
eri1
I got some host on the network on both side of my server which is in the critical path between the two segment of the same network. ( hope i'm clear). host on segment can talk to other on the other side perfectly. host on the side of the interface with the valid ip address can communicate with service running on the server but the one on the side with the dummy ip can't. This is because there is no arp entry in the table for this ip with the valid interface (eri0). If i add one myself it work fine. I must mention that there is an entry in the arp table for the host ip with the invalid interface and that i respond myself to the arp request comming from the side of the invalid interface. When a connection is tried to the eri1side i see arp request from my server on the read queue of my module comming from eri0 because of promiscious mode data feedback. I send this request on the other queue and when i get the reply I tried to sending M_PROTO DL_UNITDATA_IND on the queue of the valide interface. Whitout success as you could see.
I read on other post. That's was because of the fastpath routing. I actually see ioctl message comming downstream when i load my module ont both interface. I tried founding info about these but couldn't. Could i just respond to this ioctl with IOCNACK with the same data to disable? Is this a request to enable fast routing? (the first two byte are 0x4050 if i remember)
If you know what i'm trying to do is impossible please tell me.
Thank's.
Seb.

It is possible. I effectivly have to disable fast path for it to work. to disable you have to intercept M_IOCTL msg and qreply with M_IOCNAK - EINVAL if it's a DL_IOC_HDR_INFO ioc_cmd. This ioctl isn't the 0x4050???? one but is 0x0000440a.

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