Skip to contentSkip to conversation

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

PATCH Applied Subash Abhinov Kasiviswanathan 2 participants 2 messages Jun 5, 2018

Subsystems (4)
Networking Network drivers IPv4/IPv6 Qualcomm rmnet driver
lore
Share & tools
lore

Subash Abhinov Kasiviswanathan

author
#0 lore raw

PATCH v2 1/1 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 <[email protected]>
Signed-off-by Subash Abhinov Kasiviswanathan <[email protected]>

---
v1->v2: Yoshfuji suggested to update the I/G and G/L bit. Similar functionality is already implemented by addrconf_ifid_ip6tnl() so use it.

---
 drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c | 4 ++++
 net/ipv6/addrconf.c                             | 4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)
drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c +4 -0
index cb02e1a..b9a7548 100644
@@ -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 */
net/ipv6/addrconf.c +3 -1
index f09afc2..5596d87 100644
@@ -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;
 	}
Signature · 1 line
1.9.1