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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c109
1 files changed, 30 insertions, 79 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index f54e3a101098..4b4944c3e4c4 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -84,6 +84,8 @@ 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_prohibit(struct sk_buff *skb);
+static int ip6_pkt_prohibit_out(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);
@@ -234,9 +236,6 @@ static const struct rt6_info ip6_null_entry_template = {
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-static int ip6_pkt_prohibit(struct sk_buff *skb);
-static int ip6_pkt_prohibit_out(struct sk_buff *skb);
-
static const struct rt6_info ip6_prohibit_entry_template = {
.dst = {
.__refcnt = ATOMIC_INIT(1),
@@ -619,7 +618,7 @@ static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict,
goto out;
m = rt6_score_route(rt, oif, strict);
- if (m == RT6_NUD_FAIL_SOFT && !IS_ENABLED(CONFIG_IPV6_ROUTER_PREF)) {
+ if (m == RT6_NUD_FAIL_SOFT) {
match_do_rr = true;
m = 0; /* lowest valid score */
} else if (m < 0) {
@@ -731,8 +730,11 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
prefix = &prefix_buf;
}
- rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr,
- dev->ifindex);
+ if (rinfo->prefix_len == 0)
+ rt = rt6_get_dflt_router(gwaddr, dev);
+ else
+ rt = rt6_get_route_info(net, prefix, rinfo->prefix_len,
+ gwaddr, dev->ifindex);
if (rt && !lifetime) {
ip6_del_rt(rt);
@@ -871,11 +873,9 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort,
rt = ip6_rt_copy(ort, daddr);
if (rt) {
- if (!(rt->rt6i_flags & RTF_GATEWAY)) {
- if (ort->rt6i_dst.plen != 128 &&
- ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
- rt->rt6i_flags |= RTF_ANYCAST;
- }
+ if (ort->rt6i_dst.plen != 128 &&
+ ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
+ rt->rt6i_flags |= RTF_ANYCAST;
rt->rt6i_flags |= RTF_CACHE;
@@ -1087,10 +1087,13 @@ static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie)
if (rt->rt6i_genid != rt_genid_ipv6(dev_net(rt->dst.dev)))
return NULL;
- if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie))
- return dst;
+ if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie))
+ return NULL;
- return NULL;
+ if (rt6_check_expired(rt))
+ return NULL;
+
+ return dst;
}
static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
@@ -1160,7 +1163,6 @@ void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = oif;
fl6.flowi6_mark = mark;
- fl6.flowi6_flags = 0;
fl6.daddr = iph->daddr;
fl6.saddr = iph->saddr;
fl6.flowlabel = ip6_flowinfo(iph);
@@ -1259,7 +1261,6 @@ void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark)
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = oif;
fl6.flowi6_mark = mark;
- fl6.flowi6_flags = 0;
fl6.daddr = iph->daddr;
fl6.saddr = iph->saddr;
fl6.flowlabel = ip6_flowinfo(iph);
@@ -1281,7 +1282,6 @@ void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = oif;
fl6.flowi6_mark = mark;
- fl6.flowi6_flags = 0;
fl6.daddr = msg->dest;
fl6.saddr = iph->daddr;
@@ -1564,21 +1564,24 @@ int ip6_route_add(struct fib6_config *cfg)
goto out;
}
}
- rt->dst.output = ip6_pkt_discard_out;
- rt->dst.input = ip6_pkt_discard;
rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
switch (cfg->fc_type) {
case RTN_BLACKHOLE:
rt->dst.error = -EINVAL;
+ rt->dst.output = dst_discard;
+ rt->dst.input = dst_discard;
break;
case RTN_PROHIBIT:
rt->dst.error = -EACCES;
+ rt->dst.output = ip6_pkt_prohibit_out;
+ rt->dst.input = ip6_pkt_prohibit;
break;
case RTN_THROW:
- rt->dst.error = -EAGAIN;
- break;
default:
- rt->dst.error = -ENETUNREACH;
+ rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN
+ : -ENETUNREACH;
+ rt->dst.output = ip6_pkt_discard_out;
+ rt->dst.input = ip6_pkt_discard;
break;
}
goto install_route;
@@ -1902,9 +1905,7 @@ static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
else
rt->rt6i_gateway = *dest;
rt->rt6i_flags = ort->rt6i_flags;
- if ((ort->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) ==
- (RTF_DEFAULT | RTF_ADDRCONF))
- rt6_set_from(rt, ort);
+ rt6_set_from(rt, ort);
rt->rt6i_metric = 0;
#ifdef CONFIG_IPV6_SUBTREES
@@ -2143,8 +2144,6 @@ static int ip6_pkt_discard_out(struct sk_buff *skb)
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
}
-#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-
static int ip6_pkt_prohibit(struct sk_buff *skb)
{
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
@@ -2156,8 +2155,6 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
}
-#endif
-
/*
* Allocate a dst for local (unicast / anycast) address.
*/
@@ -2167,12 +2164,10 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
bool anycast)
{
struct net *net = dev_net(idev->dev);
- struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL);
-
- if (!rt) {
- net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n");
+ struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev,
+ DST_NOCOUNT, NULL);
+ if (!rt)
return ERR_PTR(-ENOMEM);
- }
in6_dev_hold(idev);
@@ -2828,56 +2823,12 @@ static int ip6_route_dev_notify(struct notifier_block *this,
#ifdef CONFIG_PROC_FS
-struct rt6_proc_arg
-{
- char *buffer;
- int offset;
- int length;
- int skip;
- int len;
-};
-
-static int rt6_info_route(struct rt6_info *rt, void *p_arg)
-{
- struct seq_file *m = p_arg;
-
- seq_printf(m, "%pi6 %02x ", &rt->rt6i_dst.addr, rt->rt6i_dst.plen);
-
-#ifdef CONFIG_IPV6_SUBTREES
- seq_printf(m, "%pi6 %02x ", &rt->rt6i_src.addr, rt->rt6i_src.plen);
-#else
- seq_puts(m, "00000000000000000000000000000000 00 ");
-#endif
- if (rt->rt6i_flags & RTF_GATEWAY) {
- seq_printf(m, "%pi6", &rt->rt6i_gateway);
- } else {
- seq_puts(m, "00000000000000000000000000000000");
- }
- seq_printf(m, " %08x %08x %08x %08x %8s\n",
- rt->rt6i_metric, atomic_read(&rt->dst.__refcnt),
- rt->dst.__use, rt->rt6i_flags,
- rt->dst.dev ? rt->dst.dev->name : "");
- return 0;
-}
-
-static int ipv6_route_show(struct seq_file *m, void *v)
-{
- struct net *net = (struct net *)m->private;
- fib6_clean_all_ro(net, rt6_info_route, 0, m);
- return 0;
-}
-
-static int ipv6_route_open(struct inode *inode, struct file *file)
-{
- return single_open_net(inode, file, ipv6_route_show);
-}
-
static const struct file_operations ipv6_route_proc_fops = {
.owner = THIS_MODULE,
.open = ipv6_route_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = single_release_net,
+ .release = seq_release_net,
};
static int rt6_stats_seq_show(struct seq_file *seq, void *v)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.