* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
- * $Id: icmp.c,v 1.38 2002/02/08 03:57:19 davem Exp $
- *
* Based on net/ipv4/icmp.c
*
* RFC 1885
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/icmp.h>
+#include <net/xfrm.h>
+#include <net/inet_common.h>
#include <asm/uaccess.h>
#include <asm/system.h>
-DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics) __read_mostly;
-EXPORT_SYMBOL(icmpv6_statistics);
-
/*
* The ICMP socket(s). This is the most convenient way to flow control
* our ICMP output as well as maintain a clean interface throughout
*
* On SMP we have one ICMP socket per-cpu.
*/
-static DEFINE_PER_CPU(struct socket *, __icmpv6_socket) = NULL;
-#define icmpv6_socket __get_cpu_var(__icmpv6_socket)
+static inline struct sock *icmpv6_sk(struct net *net)
+{
+ return net->ipv6.icmp_sk[smp_processor_id()];
+}
-static int icmpv6_rcv(struct sk_buff **pskb);
+static int icmpv6_rcv(struct sk_buff *skb);
-static struct inet6_protocol icmpv6_protocol = {
+static const struct inet6_protocol icmpv6_protocol = {
.handler = icmpv6_rcv,
- .flags = INET6_PROTO_FINAL,
+ .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
};
-static __inline__ int icmpv6_xmit_lock(void)
+static __inline__ struct sock *icmpv6_xmit_lock(struct net *net)
{
+ struct sock *sk;
+
local_bh_disable();
- if (unlikely(!spin_trylock(&icmpv6_socket->sk->sk_lock.slock))) {
+ sk = icmpv6_sk(net);
+ if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
/* This can happen if the output path (f.e. SIT or
* ip6ip6 tunnel) signals dst_link_failure() for an
* outgoing ICMP6 packet.
*/
local_bh_enable();
- return 1;
+ return NULL;
}
- return 0;
+ return sk;
}
-static __inline__ void icmpv6_xmit_unlock(void)
+static __inline__ void icmpv6_xmit_unlock(struct sock *sk)
{
- spin_unlock_bh(&icmpv6_socket->sk->sk_lock.slock);
+ spin_unlock_bh(&sk->sk_lock.slock);
}
/*
* Slightly more convenient version of icmpv6_send.
*/
-void icmpv6_param_prob(struct sk_buff *skb, int code, int pos)
+void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos)
{
icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos, skb->dev);
kfree_skb(skb);
return 0;
}
-static int sysctl_icmpv6_time __read_mostly = 1*HZ;
-
/*
* Check the ICMP output rate limit
*/
-static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
+static inline int icmpv6_xrlim_allow(struct sock *sk, u8 type,
struct flowi *fl)
{
struct dst_entry *dst;
+ struct net *net = sock_net(sk);
int res = 0;
/* Informational messages are not limited. */
* XXX: perhaps the expire for routing entries cloned by
* this lookup should be more aggressive (not longer than timeout).
*/
- dst = ip6_route_output(sk, fl);
+ dst = ip6_route_output(net, sk, fl);
if (dst->error) {
- IP6_INC_STATS(ip6_dst_idev(dst),
+ IP6_INC_STATS(net, ip6_dst_idev(dst),
IPSTATS_MIB_OUTNOROUTES);
} else if (dst->dev && (dst->dev->flags&IFF_LOOPBACK)) {
res = 1;
} else {
struct rt6_info *rt = (struct rt6_info *)dst;
- int tmo = sysctl_icmpv6_time;
+ int tmo = net->ipv6.sysctl.icmpv6_time;
/* Give more bandwidth to wider prefixes. */
if (rt->rt6i_dst.plen < 128)
icmp6h->icmp6_cksum = 0;
if (skb_queue_len(&sk->sk_write_queue) == 1) {
- skb->csum = csum_partial((char *)icmp6h,
+ skb->csum = csum_partial(icmp6h,
sizeof(struct icmp6hdr), skb->csum);
icmp6h->icmp6_cksum = csum_ipv6_magic(&fl->fl6_src,
&fl->fl6_dst,
tmp_csum = csum_add(tmp_csum, skb->csum);
}
- tmp_csum = csum_partial((char *)icmp6h,
+ tmp_csum = csum_partial(icmp6h,
sizeof(struct icmp6hdr), tmp_csum);
icmp6h->icmp6_cksum = csum_ipv6_magic(&fl->fl6_src,
&fl->fl6_dst,
return 0;
}
-#ifdef CONFIG_IPV6_MIP6
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
static void mip6_addr_swap(struct sk_buff *skb)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
/*
* Send an ICMP message in response to a packet in error
*/
-void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
+void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
struct net_device *dev)
{
+ struct net *net = dev_net(skb->dev);
struct inet6_dev *idev = NULL;
struct ipv6hdr *hdr = ipv6_hdr(skb);
struct sock *sk;
struct ipv6_pinfo *np;
struct in6_addr *saddr = NULL;
struct dst_entry *dst;
+ struct dst_entry *dst2;
struct icmp6hdr tmp_hdr;
struct flowi fl;
+ struct flowi fl2;
struct icmpv6_msg msg;
int iif = 0;
int addr_type = 0;
int len;
- int hlimit, tclass;
+ int hlimit;
int err = 0;
- if ((u8*)hdr < skb->head || (u8*)(hdr+1) > skb->tail)
+ if ((u8 *)hdr < skb->head ||
+ (skb->network_header + sizeof(*hdr)) > skb->tail)
return;
/*
*/
addr_type = ipv6_addr_type(&hdr->daddr);
- if (ipv6_chk_addr(&hdr->daddr, skb->dev, 0))
+ if (ipv6_chk_addr(net, &hdr->daddr, skb->dev, 0))
saddr = &hdr->daddr;
/*
fl.fl_icmp_code = code;
security_skb_classify_flow(skb, &fl);
- if (icmpv6_xmit_lock())
+ sk = icmpv6_xmit_lock(net);
+ if (sk == NULL)
return;
-
- sk = icmpv6_socket->sk;
np = inet6_sk(sk);
if (!icmpv6_xrlim_allow(sk, type, &fl))
goto out_dst_release;
}
- if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+ /* No need to clone since we're just using its address. */
+ dst2 = dst;
+
+ err = xfrm_lookup(net, &dst, &fl, sk, 0);
+ switch (err) {
+ case 0:
+ if (dst != dst2)
+ goto route_done;
+ break;
+ case -EPERM:
+ dst = NULL;
+ break;
+ default:
goto out;
+ }
+
+ if (xfrm_decode_session_reverse(skb, &fl2, AF_INET6))
+ goto relookup_failed;
+ if (ip6_dst_lookup(sk, &dst2, &fl2))
+ goto relookup_failed;
+
+ err = xfrm_lookup(net, &dst2, &fl2, sk, XFRM_LOOKUP_ICMP);
+ switch (err) {
+ case 0:
+ dst_release(dst);
+ dst = dst2;
+ break;
+ case -EPERM:
+ goto out_dst_release;
+ default:
+relookup_failed:
+ if (!dst)
+ goto out;
+ break;
+ }
+
+route_done:
if (ipv6_addr_is_multicast(&fl.fl6_dst))
hlimit = np->mcast_hops;
else
hlimit = np->hop_limit;
if (hlimit < 0)
- hlimit = dst_metric(dst, RTAX_HOPLIMIT);
- if (hlimit < 0)
- hlimit = ipv6_get_hoplimit(dst->dev);
-
- tclass = np->tclass;
- if (tclass < 0)
- tclass = 0;
+ hlimit = ip6_dst_hoplimit(dst);
msg.skb = skb;
msg.offset = skb_network_offset(skb);
err = ip6_append_data(sk, icmpv6_getfrag, &msg,
len + sizeof(struct icmp6hdr),
- sizeof(struct icmp6hdr),
- hlimit, tclass, NULL, &fl, (struct rt6_info*)dst,
+ sizeof(struct icmp6hdr), hlimit,
+ np->tclass, NULL, &fl, (struct rt6_info*)dst,
MSG_DONTWAIT);
if (err) {
ip6_flush_pending_frames(sk);
}
err = icmpv6_push_pending_frames(sk, &fl, &tmp_hdr, len + sizeof(struct icmp6hdr));
- if (type >= ICMPV6_DEST_UNREACH && type <= ICMPV6_PARAMPROB)
- ICMP6_INC_STATS_OFFSET_BH(idev, ICMP6_MIB_OUTDESTUNREACHS, type - ICMPV6_DEST_UNREACH);
- ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS);
-
out_put:
if (likely(idev != NULL))
in6_dev_put(idev);
out_dst_release:
dst_release(dst);
out:
- icmpv6_xmit_unlock();
+ icmpv6_xmit_unlock(sk);
}
EXPORT_SYMBOL(icmpv6_send);
static void icmpv6_echo_reply(struct sk_buff *skb)
{
+ struct net *net = dev_net(skb->dev);
struct sock *sk;
struct inet6_dev *idev;
struct ipv6_pinfo *np;
struct dst_entry *dst;
int err = 0;
int hlimit;
- int tclass;
saddr = &ipv6_hdr(skb)->daddr;
fl.fl_icmp_type = ICMPV6_ECHO_REPLY;
security_skb_classify_flow(skb, &fl);
- if (icmpv6_xmit_lock())
+ sk = icmpv6_xmit_lock(net);
+ if (sk == NULL)
return;
-
- sk = icmpv6_socket->sk;
np = inet6_sk(sk);
if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
err = ip6_dst_lookup(sk, &dst, &fl);
if (err)
goto out;
- if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+ if ((err = xfrm_lookup(net, &dst, &fl, sk, 0)) < 0)
goto out;
if (ipv6_addr_is_multicast(&fl.fl6_dst))
else
hlimit = np->hop_limit;
if (hlimit < 0)
- hlimit = dst_metric(dst, RTAX_HOPLIMIT);
- if (hlimit < 0)
- hlimit = ipv6_get_hoplimit(dst->dev);
-
- tclass = np->tclass;
- if (tclass < 0)
- tclass = 0;
+ hlimit = ip6_dst_hoplimit(dst);
idev = in6_dev_get(skb->dev);
msg.type = ICMPV6_ECHO_REPLY;
err = ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr),
- sizeof(struct icmp6hdr), hlimit, tclass, NULL, &fl,
+ sizeof(struct icmp6hdr), hlimit, np->tclass, NULL, &fl,
(struct rt6_info*)dst, MSG_DONTWAIT);
if (err) {
}
err = icmpv6_push_pending_frames(sk, &fl, &tmp_hdr, skb->len + sizeof(struct icmp6hdr));
- ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTECHOREPLIES);
- ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS);
-
out_put:
if (likely(idev != NULL))
in6_dev_put(idev);
dst_release(dst);
out:
- icmpv6_xmit_unlock();
+ icmpv6_xmit_unlock(sk);
}
-static void icmpv6_notify(struct sk_buff *skb, int type, int code, __be32 info)
+static void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
{
- struct in6_addr *saddr, *daddr;
- struct inet6_protocol *ipprot;
- struct sock *sk;
+ const struct inet6_protocol *ipprot;
int inner_offset;
int hash;
u8 nexthdr;
if (!pskb_may_pull(skb, inner_offset+8))
return;
- saddr = &ipv6_hdr(skb)->saddr;
- daddr = &ipv6_hdr(skb)->daddr;
-
/* BUGGG_FUTURE: we should try to parse exthdrs in this packet.
Without this we will not able f.e. to make source routed
pmtu discovery.
ipprot->err_handler(skb, NULL, type, code, inner_offset, info);
rcu_read_unlock();
- read_lock(&raw_v6_lock);
- if ((sk = sk_head(&raw_v6_htable[hash])) != NULL) {
- while((sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr,
- IP6CB(skb)->iif))) {
- rawv6_err(sk, skb, NULL, type, code, inner_offset, info);
- sk = sk_next(sk);
- }
- }
- read_unlock(&raw_v6_lock);
+ raw6_icmp_error(skb, nexthdr, type, code, inner_offset, info);
}
/*
* Handle icmp messages
*/
-static int icmpv6_rcv(struct sk_buff **pskb)
+static int icmpv6_rcv(struct sk_buff *skb)
{
- struct sk_buff *skb = *pskb;
struct net_device *dev = skb->dev;
struct inet6_dev *idev = __in6_dev_get(dev);
struct in6_addr *saddr, *daddr;
struct ipv6hdr *orig_hdr;
struct icmp6hdr *hdr;
- int type;
+ u8 type;
- ICMP6_INC_STATS_BH(idev, ICMP6_MIB_INMSGS);
+ if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+ struct sec_path *sp = skb_sec_path(skb);
+ int nh;
+
+ if (!(sp && sp->xvec[sp->len - 1]->props.flags &
+ XFRM_STATE_ICMP))
+ goto drop_no_count;
+
+ if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(*orig_hdr)))
+ goto drop_no_count;
+
+ nh = skb_network_offset(skb);
+ skb_set_network_header(skb, sizeof(*hdr));
+
+ if (!xfrm6_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
+ goto drop_no_count;
+
+ skb_set_network_header(skb, nh);
+ }
+
+ ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INMSGS);
saddr = &ipv6_hdr(skb)->saddr;
daddr = &ipv6_hdr(skb)->daddr;
skb->csum = ~csum_unfold(csum_ipv6_magic(saddr, daddr, skb->len,
IPPROTO_ICMPV6, 0));
if (__skb_checksum_complete(skb)) {
- LIMIT_NETDEBUG(KERN_DEBUG "ICMPv6 checksum failed [" NIP6_FMT " > " NIP6_FMT "]\n",
- NIP6(*saddr), NIP6(*daddr));
+ LIMIT_NETDEBUG(KERN_DEBUG "ICMPv6 checksum failed [%pI6 > %pI6]\n",
+ saddr, daddr);
goto discard_it;
}
}
- if (!pskb_pull(skb, sizeof(struct icmp6hdr)))
+ if (!pskb_pull(skb, sizeof(*hdr)))
goto discard_it;
hdr = icmp6_hdr(skb);
type = hdr->icmp6_type;
- if (type >= ICMPV6_DEST_UNREACH && type <= ICMPV6_PARAMPROB)
- ICMP6_INC_STATS_OFFSET_BH(idev, ICMP6_MIB_INDESTUNREACHS, type - ICMPV6_DEST_UNREACH);
- else if (type >= ICMPV6_ECHO_REQUEST && type <= NDISC_REDIRECT)
- ICMP6_INC_STATS_OFFSET_BH(idev, ICMP6_MIB_INECHOS, type - ICMPV6_ECHO_REQUEST);
+ ICMP6MSGIN_INC_STATS_BH(dev_net(dev), idev, type);
switch (type) {
case ICMPV6_ECHO_REQUEST:
*/
icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
- };
+ }
+
kfree_skb(skb);
return 0;
discard_it:
- ICMP6_INC_STATS_BH(idev, ICMP6_MIB_INERRORS);
+ ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INERRORS);
+drop_no_count:
kfree_skb(skb);
return 0;
}
+void icmpv6_flow_init(struct sock *sk, struct flowi *fl,
+ u8 type,
+ const struct in6_addr *saddr,
+ const struct in6_addr *daddr,
+ int oif)
+{
+ memset(fl, 0, sizeof(*fl));
+ ipv6_addr_copy(&fl->fl6_src, saddr);
+ ipv6_addr_copy(&fl->fl6_dst, daddr);
+ fl->proto = IPPROTO_ICMPV6;
+ fl->fl_icmp_type = type;
+ fl->fl_icmp_code = 0;
+ fl->oif = oif;
+ security_sk_classify_flow(sk, fl);
+}
+
/*
- * Special lock-class for __icmpv6_socket:
+ * Special lock-class for __icmpv6_sk:
*/
static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
-int __init icmpv6_init(struct net_proto_family *ops)
+static int __net_init icmpv6_sk_init(struct net *net)
{
struct sock *sk;
int err, i, j;
+ net->ipv6.icmp_sk =
+ kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
+ if (net->ipv6.icmp_sk == NULL)
+ return -ENOMEM;
+
for_each_possible_cpu(i) {
- err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6,
- &per_cpu(__icmpv6_socket, i));
+ err = inet_ctl_sock_create(&sk, PF_INET6,
+ SOCK_RAW, IPPROTO_ICMPV6, net);
if (err < 0) {
printk(KERN_ERR
"Failed to initialize the ICMP6 control socket "
goto fail;
}
- sk = per_cpu(__icmpv6_socket, i)->sk;
- sk->sk_allocation = GFP_ATOMIC;
+ net->ipv6.icmp_sk[i] = sk;
+
/*
* Split off their lock-class, because sk->sk_dst_lock
* gets used from softirqs, which is safe for
- * __icmpv6_socket (because those never get directly used
+ * __icmpv6_sk (because those never get directly used
* via userspace syscalls), but unsafe for normal sockets.
*/
lockdep_set_class(&sk->sk_dst_lock,
*/
sk->sk_sndbuf =
(2 * ((64 * 1024) + sizeof(struct sk_buff)));
-
- sk->sk_prot->unhash(sk);
}
-
-
- if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0) {
- printk(KERN_ERR "Failed to register ICMP6 protocol\n");
- err = -EAGAIN;
- goto fail;
- }
-
return 0;
fail:
- for (j = 0; j < i; j++) {
- if (!cpu_possible(j))
- continue;
- sock_release(per_cpu(__icmpv6_socket, j));
- }
-
+ for (j = 0; j < i; j++)
+ inet_ctl_sock_destroy(net->ipv6.icmp_sk[j]);
+ kfree(net->ipv6.icmp_sk);
return err;
}
-void icmpv6_cleanup(void)
+static void __net_exit icmpv6_sk_exit(struct net *net)
{
int i;
for_each_possible_cpu(i) {
- sock_release(per_cpu(__icmpv6_socket, i));
+ inet_ctl_sock_destroy(net->ipv6.icmp_sk[i]);
}
+ kfree(net->ipv6.icmp_sk);
+}
+
+static struct pernet_operations icmpv6_sk_ops = {
+ .init = icmpv6_sk_init,
+ .exit = icmpv6_sk_exit,
+};
+
+int __init icmpv6_init(void)
+{
+ int err;
+
+ err = register_pernet_subsys(&icmpv6_sk_ops);
+ if (err < 0)
+ return err;
+
+ err = -EAGAIN;
+ if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
+ goto fail;
+ return 0;
+
+fail:
+ printk(KERN_ERR "Failed to register ICMP6 protocol\n");
+ unregister_pernet_subsys(&icmpv6_sk_ops);
+ return err;
+}
+
+void icmpv6_cleanup(void)
+{
+ unregister_pernet_subsys(&icmpv6_sk_ops);
inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
}
+
static const struct icmp6_err {
int err;
int fatal;
},
};
-int icmpv6_err_convert(int type, int code, int *err)
+int icmpv6_err_convert(u8 type, u8 code, int *err)
{
int fatal = 0;
case ICMPV6_TIME_EXCEED:
*err = EHOSTUNREACH;
break;
- };
+ }
return fatal;
}
EXPORT_SYMBOL(icmpv6_err_convert);
#ifdef CONFIG_SYSCTL
-ctl_table ipv6_icmp_table[] = {
+ctl_table ipv6_icmp_table_template[] = {
{
- .ctl_name = NET_IPV6_ICMP_RATELIMIT,
.procname = "ratelimit",
- .data = &sysctl_icmpv6_time,
+ .data = &init_net.ipv6.sysctl.icmpv6_time,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = &proc_dointvec
+ .proc_handler = proc_dointvec_ms_jiffies,
},
- { .ctl_name = 0 },
+ { },
};
+
+struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
+{
+ struct ctl_table *table;
+
+ table = kmemdup(ipv6_icmp_table_template,
+ sizeof(ipv6_icmp_table_template),
+ GFP_KERNEL);
+
+ if (table)
+ table[0].data = &net->ipv6.sysctl.icmpv6_time;
+
+ return table;
+}
#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff