net: ipv6: Generate random IID for addresses on RAWIP devices

RAWIP devices such as rmnet do not have a hardware address and
instead require the kernel to generate a random IID for the
IPv6 addresses.

Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
index cb02e1a..b9a7548 100644 (file)
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
@@ -221,6 +221,10 @@ void rmnet_vnd_setup(struct net_device *rmnet_dev)
 
        rmnet_dev->needs_free_netdev = true;
        rmnet_dev->ethtool_ops = &rmnet_ethtool_ops;
+
+       /* This perm addr will be used as interface identifier by IPv6 */
+       rmnet_dev->addr_assign_type = NET_ADDR_RANDOM;
+       eth_random_addr(rmnet_dev->perm_addr);
 }
 
 /* Exposed API */

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f09afc2..5596d87 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2251,6 +2251,7 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
                return addrconf_ifid_ieee1394(eui, dev);
        case ARPHRD_TUNNEL6:
        case ARPHRD_IP6GRE:
+       case ARPHRD_RAWIP:
                return addrconf_ifid_ip6tnl(eui, dev);
        }
        return -1;
@@ -3286,7 +3287,8 @@ static void addrconf_dev_config(struct net_device *dev)
            (dev->type != ARPHRD_IP6GRE) &&
            (dev->type != ARPHRD_IPGRE) &&
            (dev->type != ARPHRD_TUNNEL) &&
-           (dev->type != ARPHRD_NONE)) {
+           (dev->type != ARPHRD_NONE) &&
+           (dev->type != ARPHRD_RAWIP)) {
                /* Alas, we support only Ethernet autoconfiguration. */
                return;
        }