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 | |
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) |
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 | } |
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 | } |
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 | static inline void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) |
48 | { |
49 | __icmpv6_send(skb, type, code, info, IP6CB(skb)); |
50 | } |
51 | |
52 | int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type, |
53 | unsigned int data_len); |
54 | |
55 | #if IS_ENABLED(CONFIG_NF_NAT) |
56 | void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info); |
57 | #else |
58 | static inline void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info) |
59 | { |
60 | struct inet6_skb_parm parm = { 0 }; |
61 | __icmpv6_send(skb_in, type, code, info, &parm); |
62 | } |
63 | #endif |
64 | |
65 | #else |
66 | |
67 | static inline void icmpv6_send(struct sk_buff *skb, |
68 | u8 type, u8 code, __u32 info) |
69 | { |
70 | } |
71 | |
72 | static inline void icmpv6_ndo_send(struct sk_buff *skb, |
73 | u8 type, u8 code, __u32 info) |
74 | { |
75 | } |
76 | #endif |
77 | |
78 | extern int icmpv6_init(void); |
79 | extern int icmpv6_err_convert(u8 type, u8 code, |
80 | int *err); |
81 | extern void icmpv6_cleanup(void); |
82 | extern void icmpv6_param_prob_reason(struct sk_buff *skb, |
83 | u8 code, int pos, |
84 | enum skb_drop_reason reason); |
85 | |
86 | struct flowi6; |
87 | struct in6_addr; |
88 | |
89 | void icmpv6_flow_init(const struct sock *sk, struct flowi6 *fl6, u8 type, |
90 | const struct in6_addr *saddr, |
91 | const struct in6_addr *daddr, int oif); |
92 | |
93 | static inline void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos) |
94 | { |
95 | icmpv6_param_prob_reason(skb, code, pos, |
96 | reason: SKB_DROP_REASON_NOT_SPECIFIED); |
97 | } |
98 | |
99 | static inline bool icmpv6_is_err(int type) |
100 | { |
101 | switch (type) { |
102 | case ICMPV6_DEST_UNREACH: |
103 | case ICMPV6_PKT_TOOBIG: |
104 | case ICMPV6_TIME_EXCEED: |
105 | case ICMPV6_PARAMPROB: |
106 | return true; |
107 | } |
108 | |
109 | return false; |
110 | } |
111 | |
112 | #endif |
113 | |