include/linux/icmpv6.h

   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