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Diffstat (limited to 'net/ipv4/icmp.c')
-rw-r--r--net/ipv4/icmp.c130
1 files changed, 101 insertions, 29 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 82baea02648..a7321a82df6 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -92,6 +92,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
#include <net/checksum.h>
+#include <net/xfrm.h>
/*
* Build xmit assembly blocks
@@ -231,7 +232,7 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
static DEFINE_PER_CPU(struct socket *, __icmp_socket) = NULL;
#define icmp_socket __get_cpu_var(__icmp_socket)
-static __inline__ int icmp_xmit_lock(void)
+static inline int icmp_xmit_lock(void)
{
local_bh_disable();
@@ -245,7 +246,7 @@ static __inline__ int icmp_xmit_lock(void)
return 0;
}
-static void icmp_xmit_unlock(void)
+static inline void icmp_xmit_unlock(void)
{
spin_unlock_bh(&icmp_socket->sk->sk_lock.slock);
}
@@ -274,18 +275,19 @@ static void icmp_xmit_unlock(void)
#define XRLIM_BURST_FACTOR 6
int xrlim_allow(struct dst_entry *dst, int timeout)
{
- unsigned long now;
+ unsigned long now, token = dst->rate_tokens;
int rc = 0;
now = jiffies;
- dst->rate_tokens += now - dst->rate_last;
+ token += now - dst->rate_last;
dst->rate_last = now;
- if (dst->rate_tokens > XRLIM_BURST_FACTOR * timeout)
- dst->rate_tokens = XRLIM_BURST_FACTOR * timeout;
- if (dst->rate_tokens >= timeout) {
- dst->rate_tokens -= timeout;
+ if (token > XRLIM_BURST_FACTOR * timeout)
+ token = XRLIM_BURST_FACTOR * timeout;
+ if (token >= timeout) {
+ token -= timeout;
rc = 1;
}
+ dst->rate_tokens = token;
return rc;
}
@@ -403,7 +405,7 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
.tos = RT_TOS(ip_hdr(skb)->tos) } },
.proto = IPPROTO_ICMP };
security_skb_classify_flow(skb, &fl);
- if (ip_route_output_key(&rt, &fl))
+ if (ip_route_output_key(rt->u.dst.dev->nd_net, &rt, &fl))
goto out_unlock;
}
if (icmpv4_xrlim_allow(rt, icmp_param->data.icmph.type,
@@ -435,9 +437,11 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
struct ipcm_cookie ipc;
__be32 saddr;
u8 tos;
+ struct net *net;
if (!rt)
goto out;
+ net = rt->u.dst.dev->nd_net;
/*
* Find the original header. It is expected to be valid, of course.
@@ -513,7 +517,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
struct net_device *dev = NULL;
if (rt->fl.iif && sysctl_icmp_errors_use_inbound_ifaddr)
- dev = dev_get_by_index(&init_net, rt->fl.iif);
+ dev = dev_get_by_index(net, rt->fl.iif);
if (dev) {
saddr = inet_select_addr(dev, 0, RT_SCOPE_LINK);
@@ -563,11 +567,71 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
}
}
};
+ int err;
+ struct rtable *rt2;
+
security_skb_classify_flow(skb_in, &fl);
- if (ip_route_output_key(&rt, &fl))
+ if (__ip_route_output_key(net, &rt, &fl))
+ goto out_unlock;
+
+ /* No need to clone since we're just using its address. */
+ rt2 = rt;
+
+ err = xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0);
+ switch (err) {
+ case 0:
+ if (rt != rt2)
+ goto route_done;
+ break;
+ case -EPERM:
+ rt = NULL;
+ break;
+ default:
+ goto out_unlock;
+ }
+
+ if (xfrm_decode_session_reverse(skb_in, &fl, AF_INET))
+ goto out_unlock;
+
+ if (inet_addr_type(net, fl.fl4_src) == RTN_LOCAL)
+ err = __ip_route_output_key(net, &rt2, &fl);
+ else {
+ struct flowi fl2 = {};
+ struct dst_entry *odst;
+
+ fl2.fl4_dst = fl.fl4_src;
+ if (ip_route_output_key(net, &rt2, &fl2))
+ goto out_unlock;
+
+ /* Ugh! */
+ odst = skb_in->dst;
+ err = ip_route_input(skb_in, fl.fl4_dst, fl.fl4_src,
+ RT_TOS(tos), rt2->u.dst.dev);
+
+ dst_release(&rt2->u.dst);
+ rt2 = (struct rtable *)skb_in->dst;
+ skb_in->dst = odst;
+ }
+
+ if (err)
+ goto out_unlock;
+
+ err = xfrm_lookup((struct dst_entry **)&rt2, &fl, NULL,
+ XFRM_LOOKUP_ICMP);
+ if (err == -ENOENT) {
+ if (!rt)
+ goto out_unlock;
+ goto route_done;
+ }
+
+ dst_release(&rt->u.dst);
+ rt = rt2;
+
+ if (err)
goto out_unlock;
}
+route_done:
if (!icmpv4_xrlim_allow(rt, type, code))
goto ende;
@@ -603,8 +667,10 @@ static void icmp_unreach(struct sk_buff *skb)
struct icmphdr *icmph;
int hash, protocol;
struct net_protocol *ipprot;
- struct sock *raw_sk;
u32 info = 0;
+ struct net *net;
+
+ net = skb->dst->dev->nd_net;
/*
* Incomplete header ?
@@ -635,7 +701,7 @@ static void icmp_unreach(struct sk_buff *skb)
"and DF set.\n",
NIPQUAD(iph->daddr));
} else {
- info = ip_rt_frag_needed(iph,
+ info = ip_rt_frag_needed(net, iph,
ntohs(icmph->un.frag.mtu));
if (!info)
goto out;
@@ -673,7 +739,7 @@ static void icmp_unreach(struct sk_buff *skb)
*/
if (!sysctl_icmp_ignore_bogus_error_responses &&
- inet_addr_type(iph->daddr) == RTN_BROADCAST) {
+ inet_addr_type(net, iph->daddr) == RTN_BROADCAST) {
if (net_ratelimit())
printk(KERN_WARNING "%u.%u.%u.%u sent an invalid ICMP "
"type %u, code %u "
@@ -697,21 +763,9 @@ static void icmp_unreach(struct sk_buff *skb)
/*
* Deliver ICMP message to raw sockets. Pretty useless feature?
*/
+ raw_icmp_error(skb, protocol, info);
- /* Note: See raw.c and net/raw.h, RAWV4_HTABLE_SIZE==MAX_INET_PROTOS */
hash = protocol & (MAX_INET_PROTOS - 1);
- read_lock(&raw_v4_lock);
- if ((raw_sk = sk_head(&raw_v4_htable[hash])) != NULL) {
- while ((raw_sk = __raw_v4_lookup(raw_sk, protocol, iph->daddr,
- iph->saddr,
- skb->dev->ifindex)) != NULL) {
- raw_err(raw_sk, skb, info);
- raw_sk = sk_next(raw_sk);
- iph = (struct iphdr *)skb->data;
- }
- }
- read_unlock(&raw_v4_lock);
-
rcu_read_lock();
ipprot = rcu_dereference(inet_protos[hash]);
if (ipprot && ipprot->err_handler)
@@ -929,6 +983,25 @@ int icmp_rcv(struct sk_buff *skb)
struct icmphdr *icmph;
struct rtable *rt = (struct rtable *)skb->dst;
+ if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+ int nh;
+
+ if (!(skb->sp && skb->sp->xvec[skb->sp->len - 1]->props.flags &
+ XFRM_STATE_ICMP))
+ goto drop;
+
+ if (!pskb_may_pull(skb, sizeof(*icmph) + sizeof(struct iphdr)))
+ goto drop;
+
+ nh = skb_network_offset(skb);
+ skb_set_network_header(skb, sizeof(*icmph));
+
+ if (!xfrm4_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
+ goto drop;
+
+ skb_set_network_header(skb, nh);
+ }
+
ICMP_INC_STATS_BH(ICMP_MIB_INMSGS);
switch (skb->ip_summed) {
@@ -942,8 +1015,7 @@ int icmp_rcv(struct sk_buff *skb)
goto error;
}
- if (!pskb_pull(skb, sizeof(struct icmphdr)))
- goto error;
+ __skb_pull(skb, sizeof(*icmph));
icmph = icmp_hdr(skb);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-20 00:03:48 +0000