blob: 14dacc544c3efc06de8ac80f6bbf6a5ee6cf6b35 [file] [log] [blame]
Pravin B Shelar5f5624c2013-04-25 11:08:30 +00001#include <linux/export.h>
2#include <linux/icmpv6.h>
3#include <linux/mutex.h>
4#include <linux/netdevice.h>
5#include <linux/spinlock.h>
6
7#include <net/ipv6.h>
8
9#if IS_ENABLED(CONFIG_IPV6)
10
11static ip6_icmp_send_t __rcu *ip6_icmp_send;
12
13int inet6_register_icmp_sender(ip6_icmp_send_t *fn)
14{
15 return (cmpxchg((ip6_icmp_send_t **)&ip6_icmp_send, NULL, fn) == NULL) ?
Ian Morris67ba4152014-08-24 21:53:10 +010016 0 : -EBUSY;
Pravin B Shelar5f5624c2013-04-25 11:08:30 +000017}
18EXPORT_SYMBOL(inet6_register_icmp_sender);
19
20int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn)
21{
22 int ret;
23
24 ret = (cmpxchg((ip6_icmp_send_t **)&ip6_icmp_send, fn, NULL) == fn) ?
25 0 : -EINVAL;
26
27 synchronize_net();
28
29 return ret;
30}
31EXPORT_SYMBOL(inet6_unregister_icmp_sender);
32
33void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
34{
35 ip6_icmp_send_t *send;
36
37 rcu_read_lock();
38 send = rcu_dereference(ip6_icmp_send);
39
40 if (!send)
41 goto out;
42 send(skb, type, code, info);
43out:
44 rcu_read_unlock();
45}
46EXPORT_SYMBOL(icmpv6_send);
47#endif