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 8 static 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) 16 17 typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info, 18 const struct in6_addr *force_saddr); 19 #if IS_BUILTIN(CONFIG_IPV6) 20 void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, 21 const struct in6_addr *force_saddr); 22 static inline void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) 23 { 24 icmp6_send(skb, type, code, info, NULL); 25 } 26 static inline int inet6_register_icmp_sender(ip6_icmp_send_t *fn) 27 { 28 BUILD_BUG_ON(fn != icmp6_send); 29 return 0; 30 } 31 static inline int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn) 32 { 33 BUILD_BUG_ON(fn != icmp6_send); 34 return 0; 35 } 36 #else 37 extern void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info); 38 extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn); 39 extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn); 40 #endif 41 42 int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type, 43 unsigned int data_len); 44 45 #if IS_ENABLED(CONFIG_NF_NAT) 46 void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info); 47 #else 48 #define icmpv6_ndo_send icmpv6_send 49 #endif 50 51 #else 52 53 static inline void icmpv6_send(struct sk_buff *skb, 54 u8 type, u8 code, __u32 info) 55 { 56 } 57 58 static inline void icmpv6_ndo_send(struct sk_buff *skb, 59 u8 type, u8 code, __u32 info) 60 { 61 } 62 #endif 63 64 extern int icmpv6_init(void); 65 extern int icmpv6_err_convert(u8 type, u8 code, 66 int *err); 67 extern void icmpv6_cleanup(void); 68 extern void icmpv6_param_prob(struct sk_buff *skb, 69 u8 code, int pos); 70 71 struct flowi6; 72 struct in6_addr; 73 extern void icmpv6_flow_init(struct sock *sk, 74 struct flowi6 *fl6, 75 u8 type, 76 const struct in6_addr *saddr, 77 const struct in6_addr *daddr, 78 int oif); 79 80 static inline bool icmpv6_is_err(int type) 81 { 82 switch (type) { 83 case ICMPV6_DEST_UNREACH: 84 case ICMPV6_PKT_TOOBIG: 85 case ICMPV6_TIME_EXCEED: 86 case ICMPV6_PARAMPROB: 87 return true; 88 } 89 90 return false; 91 } 92 93 #endif 94