include/linux/icmpv6.h

   1 #ifndef _LINUX_ICMPV6_H
   2 #define _LINUX_ICMPV6_H
   3
   4 #include <linux/skbuff.h>
   5 #include <linux/ipv6.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                              const struct inet6_skb_parm *parm);
  20 void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
  21                 const struct in6_addr *force_saddr,
  22                 const struct inet6_skb_parm *parm);
  23 #if IS_BUILTIN(CONFIG_IPV6)
  24 static inline void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
  25                                  const struct inet6_skb_parm *parm)
  26 {
  27         icmp6_send(skb, type, code, info, NULL, parm);
  28 }
  29 static inline int inet6_register_icmp_sender(ip6_icmp_send_t *fn)
  30 {
  31         BUILD_BUG_ON(fn != icmp6_send);
  32         return 0;
  33 }
  34 static inline int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn)
  35 {
  36         BUILD_BUG_ON(fn != icmp6_send);
  37         return 0;
  38 }
  39 #else
  40 extern void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
  41                           const struct inet6_skb_parm *parm);
  42 extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
  43 extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
  44 #endif
  45
  46 static inline void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
  47 {
  48         __icmpv6_send(skb, type, code, info, IP6CB(skb));
  49 }
  50
  51 int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type,
  52                                unsigned int data_len);
  53
  54 #if IS_ENABLED(CONFIG_NF_NAT)
  55 void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
  56 #else
  57 static inline void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info)
  58 {
  59         struct inet6_skb_parm parm = { 0 };
  60         __icmpv6_send(skb_in, type, code, info, &parm);
  61 }
  62 #endif
  63
  64 #else
  65
  66 static inline void icmpv6_send(struct sk_buff *skb,
  67                                u8 type, u8 code, __u32 info)
  68 {
  69 }
  70
  71 static inline void icmpv6_ndo_send(struct sk_buff *skb,
  72                                    u8 type, u8 code, __u32 info)
  73 {
  74 }
  75 #endif
  76
  77 extern int                              icmpv6_init(void);
  78 extern int                              icmpv6_err_convert(u8 type, u8 code,
  79                                                            int *err);
  80 extern void                             icmpv6_cleanup(void);
  81 extern void                             icmpv6_param_prob(struct sk_buff *skb,
  82                                                           u8 code, int pos);
  83
  84 struct flowi6;
  85 struct in6_addr;
  86 extern void                             icmpv6_flow_init(struct sock *sk,
  87                                                          struct flowi6 *fl6,
  88                                                          u8 type,
  89                                                          const struct in6_addr *saddr,
  90                                                          const struct in6_addr *daddr,
  91                                                          int oif);
  92 #endif