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Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c96
1 files changed, 73 insertions, 23 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 61f26851655c..38eeddedfc21 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -70,7 +70,7 @@
#include <net/sock.h>
#include <net/snmp.h>
-#include <net/af_ieee802154.h>
+#include <net/6lowpan.h>
#include <net/firewire.h>
#include <net/ipv6.h>
#include <net/protocol.h>
@@ -350,6 +350,12 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
setup_timer(&ndev->rs_timer, addrconf_rs_timer,
(unsigned long)ndev);
memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
+
+ if (ndev->cnf.stable_secret.initialized)
+ ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
+ else
+ ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64;
+
ndev->cnf.mtu6 = dev->mtu;
ndev->cnf.sysctl = NULL;
ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
@@ -1766,12 +1772,13 @@ struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *add
static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
{
+ if (dad_failed)
+ ifp->flags |= IFA_F_DADFAILED;
+
if (ifp->flags&IFA_F_PERMANENT) {
spin_lock_bh(&ifp->lock);
addrconf_del_dad_work(ifp);
ifp->flags |= IFA_F_TENTATIVE;
- if (dad_failed)
- ifp->flags |= IFA_F_DADFAILED;
spin_unlock_bh(&ifp->lock);
if (dad_failed)
ipv6_ifa_notify(0, ifp);
@@ -1947,9 +1954,9 @@ static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
{
- if (dev->addr_len != IEEE802154_ADDR_LEN)
+ if (dev->addr_len != EUI64_ADDR_LEN)
return -1;
- memcpy(eui, dev->dev_addr, 8);
+ memcpy(eui, dev->dev_addr, EUI64_ADDR_LEN);
eui[0] ^= 2;
return 0;
}
@@ -2041,7 +2048,6 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
case ARPHRD_IPGRE:
return addrconf_ifid_gre(eui, dev);
case ARPHRD_6LOWPAN:
- case ARPHRD_IEEE802154:
return addrconf_ifid_eui64(eui, dev);
case ARPHRD_IEEE1394:
return addrconf_ifid_ieee1394(eui, dev);
@@ -2314,6 +2320,12 @@ static void manage_tempaddrs(struct inet6_dev *idev,
}
}
+static bool is_addr_mode_generate_stable(struct inet6_dev *idev)
+{
+ return idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY ||
+ idev->addr_gen_mode == IN6_ADDR_GEN_MODE_RANDOM;
+}
+
void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
{
struct prefix_info *pinfo;
@@ -2427,8 +2439,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
in6_dev->token.s6_addr + 8, 8);
read_unlock_bh(&in6_dev->lock);
tokenized = true;
- } else if (in6_dev->addr_gen_mode ==
- IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
+ } else if (is_addr_mode_generate_stable(in6_dev) &&
!ipv6_generate_stable_address(&addr, 0,
in6_dev)) {
addr_flags |= IFA_F_STABLE_PRIVACY;
@@ -2455,7 +2466,7 @@ ok:
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
if (in6_dev->cnf.optimistic_dad &&
!net->ipv6.devconf_all->forwarding && sllao)
- addr_flags = IFA_F_OPTIMISTIC;
+ addr_flags |= IFA_F_OPTIMISTIC;
#endif
/* Do not allow to create too much of autoconfigured
@@ -3028,6 +3039,17 @@ retry:
return 0;
}
+static void ipv6_gen_mode_random_init(struct inet6_dev *idev)
+{
+ struct ipv6_stable_secret *s = &idev->cnf.stable_secret;
+
+ if (s->initialized)
+ return;
+ s = &idev->cnf.stable_secret;
+ get_random_bytes(&s->secret, sizeof(s->secret));
+ s->initialized = true;
+}
+
static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
{
struct in6_addr addr;
@@ -3038,13 +3060,18 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
- if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) {
+ switch (idev->addr_gen_mode) {
+ case IN6_ADDR_GEN_MODE_RANDOM:
+ ipv6_gen_mode_random_init(idev);
+ /* fallthrough */
+ case IN6_ADDR_GEN_MODE_STABLE_PRIVACY:
if (!ipv6_generate_stable_address(&addr, 0, idev))
addrconf_add_linklocal(idev, &addr,
IFA_F_STABLE_PRIVACY);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
- } else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) {
+ break;
+ case IN6_ADDR_GEN_MODE_EUI64:
/* addrconf_add_linklocal also adds a prefix_route and we
* only need to care about prefix routes if ipv6_generate_eui64
* couldn't generate one.
@@ -3053,6 +3080,11 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
addrconf_add_linklocal(idev, &addr, 0);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
+ break;
+ case IN6_ADDR_GEN_MODE_NONE:
+ default:
+ /* will not add any link local address */
+ break;
}
}
@@ -3066,10 +3098,10 @@ static void addrconf_dev_config(struct net_device *dev)
(dev->type != ARPHRD_FDDI) &&
(dev->type != ARPHRD_ARCNET) &&
(dev->type != ARPHRD_INFINIBAND) &&
- (dev->type != ARPHRD_IEEE802154) &&
(dev->type != ARPHRD_IEEE1394) &&
(dev->type != ARPHRD_TUNNEL6) &&
- (dev->type != ARPHRD_6LOWPAN)) {
+ (dev->type != ARPHRD_6LOWPAN) &&
+ (dev->type != ARPHRD_NONE)) {
/* Alas, we support only Ethernet autoconfiguration. */
return;
}
@@ -3078,6 +3110,11 @@ static void addrconf_dev_config(struct net_device *dev)
if (IS_ERR(idev))
return;
+ /* this device type has no EUI support */
+ if (dev->type == ARPHRD_NONE &&
+ idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64)
+ idev->addr_gen_mode = IN6_ADDR_GEN_MODE_RANDOM;
+
addrconf_addr_gen(idev, false);
}
@@ -3287,7 +3324,8 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
case NETDEV_PRE_TYPE_CHANGE:
case NETDEV_POST_TYPE_CHANGE:
- addrconf_type_change(dev, event);
+ if (idev)
+ addrconf_type_change(dev, event);
break;
}
@@ -4921,7 +4959,8 @@ static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
if (mode != IN6_ADDR_GEN_MODE_EUI64 &&
mode != IN6_ADDR_GEN_MODE_NONE &&
- mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY)
+ mode != IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
+ mode != IN6_ADDR_GEN_MODE_RANDOM)
return -EINVAL;
if (mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
@@ -5200,6 +5239,20 @@ int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
}
static
+int addrconf_sysctl_hop_limit(struct ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct ctl_table lctl;
+ int min_hl = 1, max_hl = 255;
+
+ lctl = *ctl;
+ lctl.extra1 = &min_hl;
+ lctl.extra2 = &max_hl;
+
+ return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos);
+}
+
+static
int addrconf_sysctl_mtu(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
@@ -5363,13 +5416,10 @@ static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write,
goto out;
}
- if (!write) {
- err = snprintf(str, sizeof(str), "%pI6",
- &secret->secret);
- if (err >= sizeof(str)) {
- err = -EIO;
- goto out;
- }
+ err = snprintf(str, sizeof(str), "%pI6", &secret->secret);
+ if (err >= sizeof(str)) {
+ err = -EIO;
+ goto out;
}
err = proc_dostring(&lctl, write, buffer, lenp, ppos);
@@ -5454,7 +5504,7 @@ static struct addrconf_sysctl_table
.data = &ipv6_devconf.hop_limit,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec,
+ .proc_handler = addrconf_sysctl_hop_limit,
},
{
.procname = "mtu",
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-01 17:28:21 +0300