int
arp_init(void)
{
struct dpf_ir filter;
int i;
/* pkt statically */
for(i = 0; i < RINGSZ; i++) {
arp_pkt = &arp_pkts[i];
arp_pkt->next = &arp_pkts[i+1];
arp_pkt->pollptr = &arp_pkts[i].flag;
arp_pkt->n = 1;
arp_pkt->sz = ETHER_MAX_LEN;
arp_pkt->data = &arp_pkt->space[0];
arp_pkt->flag = 0;
}
/* fix last entry */
arp_pkt->next = &arp_pkts[0];
if ((arp_ringid = sys_pktring_setring
(CAP_ARP,0,(struct pktringent *) arp_pkt))<=0)
{
kprintf ("vos arpd: setring failed: returned: %d!\n",arp_ringid);
assert (0);
}
dpf_begin(&filter); /* must be done before use */
/* eth protocol = arp */
dpf_eq16(&filter, eth_offset(proto), htons(EP_ARP));
/* hardware proto = 1 */
dpf_eq16(&filter, eth_sz+arp_offset(arp_hrd), htons(1));
/* target proto = EP_IP */
dpf_eq16(&filter, eth_sz+arp_offset(arp_pro), htons(EP_IP));
dprintf("vos arpd: inserting arp replies filter...\n");
arp_fid_res = sys_self_dpf_insert(CAP_USER, CAP_ARP, &filter, arp_ringid);
if((int)(arp_fid_res) < 0)
{
kprintf("vos arpd: failed to insert ARP filter, already listening?\n");
return -1;
}
kprintf("vos arpd: arp replies filter: using filter %d, pkt: %p, env: %d)\n",
arp_fid_res,arp_pkt,getpid());
dprintf("(using pktrings, arp_ringid: %d)\n",arp_ringid);
arp_pkt->flag = 0;
return 0;
}
int
xok_sys_self_dpf_insert (u_int a1, u_int a2, void *a3, int a4)
{
return sys_self_dpf_insert(a1, a2, a3, a4);
}
