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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_ICMPV6_H
3#define _LINUX_ICMPV6_H
4
5#include <linux/skbuff.h>
6#include <uapi/linux/icmpv6.h>
7
8static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
9{
10 return (struct icmp6hdr *)skb_transport_header(skb);
11}
12
13#include <linux/netdevice.h>
14
15#if IS_ENABLED(CONFIG_IPV6)
16extern void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info);
17
18typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info,
19 const struct in6_addr *force_saddr);
20extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
21extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
22int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type,
23 unsigned int data_len);
24
25#else
26
27static inline void icmpv6_send(struct sk_buff *skb,
28 u8 type, u8 code, __u32 info)
29{
30
31}
32#endif
33
34#if IS_ENABLED(CONFIG_NF_NAT)
35void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
36#else
37#define icmpv6_ndo_send icmpv6_send
38#endif
39
40extern int icmpv6_init(void);
41extern int icmpv6_err_convert(u8 type, u8 code,
42 int *err);
43extern void icmpv6_cleanup(void);
44extern void icmpv6_param_prob(struct sk_buff *skb,
45 u8 code, int pos);
46
47struct flowi6;
48struct in6_addr;
49extern void icmpv6_flow_init(struct sock *sk,
50 struct flowi6 *fl6,
51 u8 type,
52 const struct in6_addr *saddr,
53 const struct in6_addr *daddr,
54 int oif);
55
56static inline bool icmpv6_is_err(int type)
57{
58 switch (type) {
59 case ICMPV6_DEST_UNREACH:
60 case ICMPV6_PKT_TOOBIG:
61 case ICMPV6_TIME_EXCEED:
62 case ICMPV6_PARAMPROB:
63 return true;
64 }
65
66 return false;
67}
68
69#endif