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[IPV6]: ADDRCONF: Split up ipv6_generate_eui64() by device type.

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-03-20 16:54:49 -08:00 committed by David S. Miller
parent 955189efb4
commit 073a8e0e15
1 changed files with 53 additions and 38 deletions
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91
net/ipv6/addrconf.c
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@ -1299,52 +1299,67 @@ static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
__ipv6_dev_ac_dec(ifp->idev, &addr); __ipv6_dev_ac_dec(ifp->idev, &addr);
} }
static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
if (dev->addr_len != ETH_ALEN)
return -1;
memcpy(eui, dev->dev_addr, 3);
memcpy(eui + 5, dev->dev_addr + 3, 3);
/*
* The zSeries OSA network cards can be shared among various
* OS instances, but the OSA cards have only one MAC address.
* This leads to duplicate address conflicts in conjunction
* with IPv6 if more than one instance uses the same card.
*
* The driver for these cards can deliver a unique 16-bit
* identifier for each instance sharing the same card. It is
* placed instead of 0xFFFE in the interface identifier. The
* "u" bit of the interface identifier is not inverted in this
* case. Hence the resulting interface identifier has local
* scope according to RFC2373.
*/
if (dev->dev_id) {
eui[3] = (dev->dev_id >> 8) & 0xFF;
eui[4] = dev->dev_id & 0xFF;
} else {
eui[3] = 0xFF;
eui[4] = 0xFE;
eui[0] ^= 2;
}
return 0;
}
static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
{
/* XXX: inherit EUI-64 from other interface -- yoshfuji */
if (dev->addr_len != ARCNET_ALEN)
return -1;
memset(eui, 0, 7);
eui[7] = *(u8*)dev->dev_addr;
return 0;
}
static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
{
if (dev->addr_len != INFINIBAND_ALEN)
return -1;
memcpy(eui, dev->dev_addr + 12, 8);
eui[0] |= 2;
return 0;
}
static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
{ {
switch (dev->type) { switch (dev->type) {
case ARPHRD_ETHER: case ARPHRD_ETHER:
case ARPHRD_FDDI: case ARPHRD_FDDI:
case ARPHRD_IEEE802_TR: case ARPHRD_IEEE802_TR:
if (dev->addr_len != ETH_ALEN) return addrconf_ifid_eui48(eui, dev);
return -1;
memcpy(eui, dev->dev_addr, 3);
memcpy(eui + 5, dev->dev_addr + 3, 3);
/*
* The zSeries OSA network cards can be shared among various
* OS instances, but the OSA cards have only one MAC address.
* This leads to duplicate address conflicts in conjunction
* with IPv6 if more than one instance uses the same card.
*
* The driver for these cards can deliver a unique 16-bit
* identifier for each instance sharing the same card. It is
* placed instead of 0xFFFE in the interface identifier. The
* "u" bit of the interface identifier is not inverted in this
* case. Hence the resulting interface identifier has local
* scope according to RFC2373.
*/
if (dev->dev_id) {
eui[3] = (dev->dev_id >> 8) & 0xFF;
eui[4] = dev->dev_id & 0xFF;
} else {
eui[3] = 0xFF;
eui[4] = 0xFE;
eui[0] ^= 2;
}
return 0;
case ARPHRD_ARCNET: case ARPHRD_ARCNET:
/* XXX: inherit EUI-64 from other interface -- yoshfuji */ return addrconf_ifid_arcnet(eui, dev);
if (dev->addr_len != ARCNET_ALEN)
return -1;
memset(eui, 0, 7);
eui[7] = *(u8*)dev->dev_addr;
return 0;
case ARPHRD_INFINIBAND: case ARPHRD_INFINIBAND:
if (dev->addr_len != INFINIBAND_ALEN) return addrconf_ifid_infiniband(eui, dev);
return -1;
memcpy(eui, dev->dev_addr + 12, 8);
eui[0] |= 2;
return 0;
} }
return -1; return -1;
} }