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 <linux/ipv6.h>
7 #include <uapi/linux/icmpv6.h>
8
icmp6_hdr(const struct sk_buff * skb)9 static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
10 {
11 return (struct icmp6hdr *)skb_transport_header(skb);
12 }
13
14 #include <linux/netdevice.h>
15
16 #if IS_ENABLED(CONFIG_IPV6)
17
18 typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info,
19 const struct in6_addr *force_saddr,
20 const struct inet6_skb_parm *parm);
21 void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
22 const struct in6_addr *force_saddr,
23 const struct inet6_skb_parm *parm);
24 #if IS_BUILTIN(CONFIG_IPV6)
__icmpv6_send(struct sk_buff * skb,u8 type,u8 code,__u32 info,const struct inet6_skb_parm * parm)25 static inline void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
26 const struct inet6_skb_parm *parm)
27 {
28 icmp6_send(skb, type, code, info, NULL, parm);
29 }
inet6_register_icmp_sender(ip6_icmp_send_t * fn)30 static inline int inet6_register_icmp_sender(ip6_icmp_send_t *fn)
31 {
32 BUILD_BUG_ON(fn != icmp6_send);
33 return 0;
34 }
inet6_unregister_icmp_sender(ip6_icmp_send_t * fn)35 static inline int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn)
36 {
37 BUILD_BUG_ON(fn != icmp6_send);
38 return 0;
39 }
40 #else
41 extern void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
42 const struct inet6_skb_parm *parm);
43 extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
44 extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
45 #endif
46
47 void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info);
48
49 int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type,
50 unsigned int data_len);
51
52 #if IS_ENABLED(CONFIG_NF_NAT)
53 void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
54 #else
icmpv6_ndo_send(struct sk_buff * skb_in,u8 type,u8 code,__u32 info)55 static inline void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info)
56 {
57 struct inet6_skb_parm parm = { 0 };
58 __icmpv6_send(skb_in, type, code, info, &parm);
59 }
60 #endif
61
62 #else
63
icmpv6_send(struct sk_buff * skb,u8 type,u8 code,__u32 info)64 static inline void icmpv6_send(struct sk_buff *skb,
65 u8 type, u8 code, __u32 info)
66 {
67 }
68
icmpv6_ndo_send(struct sk_buff * skb,u8 type,u8 code,__u32 info)69 static inline void icmpv6_ndo_send(struct sk_buff *skb,
70 u8 type, u8 code, __u32 info)
71 {
72 }
73 #endif
74
75 extern int icmpv6_init(void);
76 extern int icmpv6_err_convert(u8 type, u8 code,
77 int *err);
78 extern void icmpv6_cleanup(void);
79 extern void icmpv6_param_prob(struct sk_buff *skb,
80 u8 code, int pos);
81
82 struct flowi6;
83 struct in6_addr;
84 extern void icmpv6_flow_init(struct sock *sk,
85 struct flowi6 *fl6,
86 u8 type,
87 const struct in6_addr *saddr,
88 const struct in6_addr *daddr,
89 int oif);
90 #endif
91