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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c95
1 files changed, 47 insertions, 48 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fba54a407bb2..6ebdb7b6744c 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -84,9 +84,9 @@ static void ip6_dst_ifdown(struct dst_entry *,
static int ip6_dst_gc(struct dst_ops *ops);
static int ip6_pkt_discard(struct sk_buff *skb);
-static int ip6_pkt_discard_out(struct sk_buff *skb);
+static int ip6_pkt_discard_out(struct sock *sk, struct sk_buff *skb);
static int ip6_pkt_prohibit(struct sk_buff *skb);
-static int ip6_pkt_prohibit_out(struct sk_buff *skb);
+static int ip6_pkt_prohibit_out(struct sock *sk, struct sk_buff *skb);
static void ip6_link_failure(struct sk_buff *skb);
static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb, u32 mtu);
@@ -149,7 +149,8 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
unsigned long prev, new;
p = peer->metrics;
- if (inet_metrics_new(peer))
+ if (inet_metrics_new(peer) ||
+ (old & DST_METRICS_FORCE_OVERWRITE))
memcpy(p, old_p, sizeof(u32) * RTAX_MAX);
new = (unsigned long) p;
@@ -289,7 +290,7 @@ static const struct rt6_info ip6_blk_hole_entry_template = {
.obsolete = DST_OBSOLETE_FORCE_CHK,
.error = -EINVAL,
.input = dst_discard,
- .output = dst_discard,
+ .output = dst_discard_sk,
},
.rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
.rt6i_protocol = RTPROT_KERNEL,
@@ -373,12 +374,6 @@ static bool rt6_check_expired(const struct rt6_info *rt)
return false;
}
-static bool rt6_need_strict(const struct in6_addr *daddr)
-{
- return ipv6_addr_type(daddr) &
- (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK);
-}
-
/* Multipath route selection:
* Hash based function using packet header and flowlabel.
* Adapted from fib_info_hashfn()
@@ -857,14 +852,15 @@ EXPORT_SYMBOL(rt6_lookup);
be destroyed.
*/
-static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info)
+static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info,
+ struct nlattr *mx, int mx_len)
{
int err;
struct fib6_table *table;
table = rt->rt6i_table;
write_lock_bh(&table->tb6_lock);
- err = fib6_add(&table->tb6_root, rt, info);
+ err = fib6_add(&table->tb6_root, rt, info, mx, mx_len);
write_unlock_bh(&table->tb6_lock);
return err;
@@ -875,7 +871,7 @@ int ip6_ins_rt(struct rt6_info *rt)
struct nl_info info = {
.nl_net = dev_net(rt->dst.dev),
};
- return __ip6_ins_rt(rt, &info);
+ return __ip6_ins_rt(rt, &info, NULL, 0);
}
static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
@@ -1062,7 +1058,7 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
new->__use = 1;
new->input = dst_discard;
- new->output = dst_discard;
+ new->output = dst_discard_sk;
if (dst_metrics_read_only(&ort->dst))
new->_metrics = ort->dst._metrics;
@@ -1277,6 +1273,7 @@ void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark)
struct flowi6 fl6;
memset(&fl6, 0, sizeof(fl6));
+ fl6.flowi6_iif = LOOPBACK_IFINDEX;
fl6.flowi6_oif = oif;
fl6.flowi6_mark = mark;
fl6.daddr = iph->daddr;
@@ -1298,6 +1295,7 @@ void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
struct flowi6 fl6;
memset(&fl6, 0, sizeof(fl6));
+ fl6.flowi6_iif = LOOPBACK_IFINDEX;
fl6.flowi6_oif = oif;
fl6.flowi6_mark = mark;
fl6.daddr = msg->dest;
@@ -1342,7 +1340,7 @@ static unsigned int ip6_mtu(const struct dst_entry *dst)
unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);
if (mtu)
- return mtu;
+ goto out;
mtu = IPV6_MIN_MTU;
@@ -1352,7 +1350,8 @@ static unsigned int ip6_mtu(const struct dst_entry *dst)
mtu = idev->cnf.mtu6;
rcu_read_unlock();
- return mtu;
+out:
+ return min_t(unsigned int, mtu, IP6_MAX_MTU);
}
static struct dst_entry *icmp6_dst_gc_list;
@@ -1543,17 +1542,11 @@ int ip6_route_add(struct fib6_config *cfg)
ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
rt->rt6i_dst.plen = cfg->fc_dst_len;
- if (rt->rt6i_dst.plen == 128)
- rt->dst.flags |= DST_HOST;
-
- if (!(rt->dst.flags & DST_HOST) && cfg->fc_mx) {
- u32 *metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
- if (!metrics) {
- err = -ENOMEM;
- goto out;
- }
- dst_init_metrics(&rt->dst, metrics, 0);
+ if (rt->rt6i_dst.plen == 128) {
+ rt->dst.flags |= DST_HOST;
+ dst_metrics_set_force_overwrite(&rt->dst);
}
+
#ifdef CONFIG_IPV6_SUBTREES
ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
rt->rt6i_src.plen = cfg->fc_src_len;
@@ -1586,7 +1579,7 @@ int ip6_route_add(struct fib6_config *cfg)
switch (cfg->fc_type) {
case RTN_BLACKHOLE:
rt->dst.error = -EINVAL;
- rt->dst.output = dst_discard;
+ rt->dst.output = dst_discard_sk;
rt->dst.input = dst_discard;
break;
case RTN_PROHIBIT:
@@ -1672,31 +1665,13 @@ int ip6_route_add(struct fib6_config *cfg)
rt->rt6i_flags = cfg->fc_flags;
install_route:
- if (cfg->fc_mx) {
- struct nlattr *nla;
- int remaining;
-
- nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
- int type = nla_type(nla);
-
- if (type) {
- if (type > RTAX_MAX) {
- err = -EINVAL;
- goto out;
- }
-
- dst_metric_set(&rt->dst, type, nla_get_u32(nla));
- }
- }
- }
-
rt->dst.dev = dev;
rt->rt6i_idev = idev;
rt->rt6i_table = table;
cfg->fc_nlinfo.nl_net = dev_net(dev);
- return __ip6_ins_rt(rt, &cfg->fc_nlinfo);
+ return __ip6_ins_rt(rt, &cfg->fc_nlinfo, cfg->fc_mx, cfg->fc_mx_len);
out:
if (dev)
@@ -2156,7 +2131,7 @@ static int ip6_pkt_discard(struct sk_buff *skb)
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES);
}
-static int ip6_pkt_discard_out(struct sk_buff *skb)
+static int ip6_pkt_discard_out(struct sock *sk, struct sk_buff *skb)
{
skb->dev = skb_dst(skb)->dev;
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
@@ -2167,7 +2142,7 @@ static int ip6_pkt_prohibit(struct sk_buff *skb)
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
}
-static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+static int ip6_pkt_prohibit_out(struct sock *sk, struct sk_buff *skb)
{
skb->dev = skb_dst(skb)->dev;
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
@@ -2259,6 +2234,27 @@ void rt6_remove_prefsrc(struct inet6_ifaddr *ifp)
fib6_clean_all(net, fib6_remove_prefsrc, &adni);
}
+#define RTF_RA_ROUTER (RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY)
+#define RTF_CACHE_GATEWAY (RTF_GATEWAY | RTF_CACHE)
+
+/* Remove routers and update dst entries when gateway turn into host. */
+static int fib6_clean_tohost(struct rt6_info *rt, void *arg)
+{
+ struct in6_addr *gateway = (struct in6_addr *)arg;
+
+ if ((((rt->rt6i_flags & RTF_RA_ROUTER) == RTF_RA_ROUTER) ||
+ ((rt->rt6i_flags & RTF_CACHE_GATEWAY) == RTF_CACHE_GATEWAY)) &&
+ ipv6_addr_equal(gateway, &rt->rt6i_gateway)) {
+ return -1;
+ }
+ return 0;
+}
+
+void rt6_clean_tohost(struct net *net, struct in6_addr *gateway)
+{
+ fib6_clean_all(net, fib6_clean_tohost, gateway);
+}
+
struct arg_dev_net {
struct net_device *dev;
struct net *net;
@@ -2734,6 +2730,9 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh)
if (tb[RTA_OIF])
oif = nla_get_u32(tb[RTA_OIF]);
+ if (tb[RTA_MARK])
+ fl6.flowi6_mark = nla_get_u32(tb[RTA_MARK]);
+
if (iif) {
struct net_device *dev;
int flags = 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.