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Linux/include/linux/icmpv6.h

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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 
  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 extern void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info);
 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 extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
 21 extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
 22 int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type,
 23                                unsigned int data_len);
 24 
 25 #if IS_ENABLED(CONFIG_NF_NAT)
 26 void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
 27 #else
 28 #define icmpv6_ndo_send icmpv6_send
 29 #endif
 30 
 31 #else
 32 
 33 static inline void icmpv6_send(struct sk_buff *skb,
 34                                u8 type, u8 code, __u32 info)
 35 {
 36 }
 37 
 38 static inline void icmpv6_ndo_send(struct sk_buff *skb,
 39                                    u8 type, u8 code, __u32 info)
 40 {
 41 }
 42 #endif
 43 
 44 extern int                              icmpv6_init(void);
 45 extern int                              icmpv6_err_convert(u8 type, u8 code,
 46                                                            int *err);
 47 extern void                             icmpv6_cleanup(void);
 48 extern void                             icmpv6_param_prob(struct sk_buff *skb,
 49                                                           u8 code, int pos);
 50 
 51 struct flowi6;
 52 struct in6_addr;
 53 extern void                             icmpv6_flow_init(struct sock *sk,
 54                                                          struct flowi6 *fl6,
 55                                                          u8 type,
 56                                                          const struct in6_addr *saddr,
 57                                                          const struct in6_addr *daddr,
 58                                                          int oif);
 59 
 60 static inline bool icmpv6_is_err(int type)
 61 {
 62         switch (type) {
 63         case ICMPV6_DEST_UNREACH:
 64         case ICMPV6_PKT_TOOBIG:
 65         case ICMPV6_TIME_EXCEED:
 66         case ICMPV6_PARAMPROB:
 67                 return true;
 68         }
 69 
 70         return false;
 71 }
 72 
 73 #endif
 74 

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