[IPV6]: ADDRCONF: Split up ipv6_generate_eui64() by device type.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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955189efb4
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@ -1299,52 +1299,67 @@ static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
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__ipv6_dev_ac_dec(ifp->idev, &addr);
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}
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static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
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{
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if (dev->addr_len != ETH_ALEN)
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return -1;
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memcpy(eui, dev->dev_addr, 3);
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memcpy(eui + 5, dev->dev_addr + 3, 3);
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/*
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* The zSeries OSA network cards can be shared among various
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* OS instances, but the OSA cards have only one MAC address.
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* This leads to duplicate address conflicts in conjunction
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* with IPv6 if more than one instance uses the same card.
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*
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* The driver for these cards can deliver a unique 16-bit
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* identifier for each instance sharing the same card. It is
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* placed instead of 0xFFFE in the interface identifier. The
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* "u" bit of the interface identifier is not inverted in this
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* case. Hence the resulting interface identifier has local
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* scope according to RFC2373.
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*/
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if (dev->dev_id) {
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eui[3] = (dev->dev_id >> 8) & 0xFF;
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eui[4] = dev->dev_id & 0xFF;
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} else {
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eui[3] = 0xFF;
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eui[4] = 0xFE;
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eui[0] ^= 2;
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}
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return 0;
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}
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static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
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{
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/* XXX: inherit EUI-64 from other interface -- yoshfuji */
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if (dev->addr_len != ARCNET_ALEN)
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return -1;
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memset(eui, 0, 7);
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eui[7] = *(u8*)dev->dev_addr;
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return 0;
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}
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static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
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{
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if (dev->addr_len != INFINIBAND_ALEN)
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return -1;
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memcpy(eui, dev->dev_addr + 12, 8);
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eui[0] |= 2;
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return 0;
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}
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static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
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{
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switch (dev->type) {
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case ARPHRD_ETHER:
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case ARPHRD_FDDI:
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case ARPHRD_IEEE802_TR:
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if (dev->addr_len != ETH_ALEN)
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return -1;
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memcpy(eui, dev->dev_addr, 3);
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memcpy(eui + 5, dev->dev_addr + 3, 3);
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/*
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* The zSeries OSA network cards can be shared among various
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* OS instances, but the OSA cards have only one MAC address.
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* This leads to duplicate address conflicts in conjunction
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* with IPv6 if more than one instance uses the same card.
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*
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* The driver for these cards can deliver a unique 16-bit
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* identifier for each instance sharing the same card. It is
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* placed instead of 0xFFFE in the interface identifier. The
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* "u" bit of the interface identifier is not inverted in this
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* case. Hence the resulting interface identifier has local
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* scope according to RFC2373.
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*/
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if (dev->dev_id) {
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eui[3] = (dev->dev_id >> 8) & 0xFF;
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eui[4] = dev->dev_id & 0xFF;
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} else {
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eui[3] = 0xFF;
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eui[4] = 0xFE;
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eui[0] ^= 2;
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}
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return 0;
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return addrconf_ifid_eui48(eui, dev);
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case ARPHRD_ARCNET:
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/* XXX: inherit EUI-64 from other interface -- yoshfuji */
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if (dev->addr_len != ARCNET_ALEN)
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return -1;
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memset(eui, 0, 7);
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eui[7] = *(u8*)dev->dev_addr;
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return 0;
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return addrconf_ifid_arcnet(eui, dev);
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case ARPHRD_INFINIBAND:
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if (dev->addr_len != INFINIBAND_ALEN)
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return -1;
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memcpy(eui, dev->dev_addr + 12, 8);
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eui[0] |= 2;
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return 0;
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return addrconf_ifid_infiniband(eui, dev);
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}
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return -1;
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}
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