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Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c116
1 files changed, 40 insertions, 76 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1220e2c7831e..a8218bc1806a 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -40,6 +40,7 @@
#include <linux/errno.h>
#include <linux/types.h>
+#include <linux/kernel.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/net.h>
@@ -590,6 +591,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
{
struct inet6_ifaddr *ifa = NULL;
struct rt6_info *rt;
+ struct net *net = dev_net(idev->dev);
int hash;
int err = 0;
int addr_type = ipv6_addr_type(addr);
@@ -606,6 +608,11 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
goto out2;
}
+ if (idev->cnf.disable_ipv6 || net->ipv6.devconf_all->disable_ipv6) {
+ err = -EACCES;
+ goto out2;
+ }
+
write_lock(&addrconf_hash_lock);
/* Ignore adding duplicate addresses on an interface */
@@ -1209,16 +1216,12 @@ int ipv6_dev_get_saddr(struct net *net, struct net_device *dst_dev,
}
break;
} else if (minihiscore < miniscore) {
- struct ipv6_saddr_score *tmp;
-
if (hiscore->ifa)
in6_ifa_put(hiscore->ifa);
in6_ifa_hold(score->ifa);
- tmp = hiscore;
- hiscore = score;
- score = tmp;
+ swap(hiscore, score);
/* restore our iterator */
score->ifa = hiscore->ifa;
@@ -1367,40 +1370,6 @@ struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *add
return ifp;
}
-int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
-{
- const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
- const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
- __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
- __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
- int sk_ipv6only = ipv6_only_sock(sk);
- int sk2_ipv6only = inet_v6_ipv6only(sk2);
- int addr_type = ipv6_addr_type(sk_rcv_saddr6);
- int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
-
- if (!sk2_rcv_saddr && !sk_ipv6only)
- return 1;
-
- if (addr_type2 == IPV6_ADDR_ANY &&
- !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
- return 1;
-
- if (addr_type == IPV6_ADDR_ANY &&
- !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
- return 1;
-
- if (sk2_rcv_saddr6 &&
- ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
- return 1;
-
- if (addr_type == IPV6_ADDR_MAPPED &&
- !sk2_ipv6only &&
- (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
- return 1;
-
- return 0;
-}
-
/* Gets referenced address, destroys ifaddr */
static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
@@ -1433,6 +1402,11 @@ static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
void addrconf_dad_failure(struct inet6_ifaddr *ifp)
{
struct inet6_dev *idev = ifp->idev;
+
+ if (net_ratelimit())
+ printk(KERN_INFO "%s: IPv6 duplicate address detected!\n",
+ ifp->idev->dev->name);
+
if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
struct in6_addr addr;
@@ -1443,11 +1417,12 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp)
ipv6_addr_equal(&ifp->addr, &addr)) {
/* DAD failed for link-local based on MAC address */
idev->cnf.disable_ipv6 = 1;
+
+ printk(KERN_INFO "%s: IPv6 being disabled!\n",
+ ifp->idev->dev->name);
}
}
- if (net_ratelimit())
- printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
addrconf_dad_stop(ifp);
}
@@ -2227,10 +2202,24 @@ int addrconf_del_ifaddr(struct net *net, void __user *arg)
return err;
}
+static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
+ int plen, int scope)
+{
+ struct inet6_ifaddr *ifp;
+
+ ifp = ipv6_add_addr(idev, addr, plen, scope, IFA_F_PERMANENT);
+ if (!IS_ERR(ifp)) {
+ spin_lock_bh(&ifp->lock);
+ ifp->flags &= ~IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ ipv6_ifa_notify(RTM_NEWADDR, ifp);
+ in6_ifa_put(ifp);
+ }
+}
+
#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
static void sit_add_v4_addrs(struct inet6_dev *idev)
{
- struct inet6_ifaddr * ifp;
struct in6_addr addr;
struct net_device *dev;
struct net *net = dev_net(idev->dev);
@@ -2249,14 +2238,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
}
if (addr.s6_addr32[3]) {
- ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
- if (!IS_ERR(ifp)) {
- spin_lock_bh(&ifp->lock);
- ifp->flags &= ~IFA_F_TENTATIVE;
- spin_unlock_bh(&ifp->lock);
- ipv6_ifa_notify(RTM_NEWADDR, ifp);
- in6_ifa_put(ifp);
- }
+ add_addr(idev, &addr, 128, scope);
return;
}
@@ -2284,15 +2266,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
else
plen = 96;
- ifp = ipv6_add_addr(idev, &addr, plen, flag,
- IFA_F_PERMANENT);
- if (!IS_ERR(ifp)) {
- spin_lock_bh(&ifp->lock);
- ifp->flags &= ~IFA_F_TENTATIVE;
- spin_unlock_bh(&ifp->lock);
- ipv6_ifa_notify(RTM_NEWADDR, ifp);
- in6_ifa_put(ifp);
- }
+ add_addr(idev, &addr, plen, flag);
}
}
}
@@ -2302,7 +2276,6 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
static void init_loopback(struct net_device *dev)
{
struct inet6_dev *idev;
- struct inet6_ifaddr * ifp;
/* ::1 */
@@ -2313,14 +2286,7 @@ static void init_loopback(struct net_device *dev)
return;
}
- ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
- if (!IS_ERR(ifp)) {
- spin_lock_bh(&ifp->lock);
- ifp->flags &= ~IFA_F_TENTATIVE;
- spin_unlock_bh(&ifp->lock);
- ipv6_ifa_notify(RTM_NEWADDR, ifp);
- in6_ifa_put(ifp);
- }
+ add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
}
static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
@@ -2832,11 +2798,6 @@ static void addrconf_dad_timer(unsigned long data)
read_unlock_bh(&idev->lock);
goto out;
}
- if (idev->cnf.accept_dad > 1 && idev->cnf.disable_ipv6) {
- read_unlock_bh(&idev->lock);
- addrconf_dad_failure(ifp);
- return;
- }
spin_lock_bh(&ifp->lock);
if (ifp->probes == 0) {
/*
@@ -3647,7 +3608,8 @@ static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
kfree_skb(skb);
goto errout;
}
- err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
+ rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
+ return;
errout:
if (err < 0)
rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
@@ -3858,7 +3820,8 @@ void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
kfree_skb(skb);
goto errout;
}
- err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
+ rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
+ return;
errout:
if (err < 0)
rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
@@ -3928,7 +3891,8 @@ static void inet6_prefix_notify(int event, struct inet6_dev *idev,
kfree_skb(skb);
goto errout;
}
- err = rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
+ rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
+ return;
errout:
if (err < 0)
rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.