LXR linux/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 <linux/ipv6.h>
   7#include <uapi/linux/icmpv6.h>
   8
   9static 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
  18typedef 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);
  21void 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)
  25static 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}
  30static inline int inet6_register_icmp_sender(ip6_icmp_send_t *fn)
  31{
  32        BUILD_BUG_ON(fn != icmp6_send);
  33        return 0;
  34}
  35static 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
  41extern void __icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
  42                          const struct inet6_skb_parm *parm);
  43extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn);
  44extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn);
  45#endif
  46
  47static 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
  52int 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)
  56void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info);
  57#else
  58static 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
  67static inline void icmpv6_send(struct sk_buff *skb,
  68                               u8 type, u8 code, __u32 info)
  69{
  70}
  71
  72static inline void icmpv6_ndo_send(struct sk_buff *skb,
  73                                   u8 type, u8 code, __u32 info)
  74{
  75}
  76#endif
  77
  78extern int                              icmpv6_init(void);
  79extern int                              icmpv6_err_convert(u8 type, u8 code,
  80                                                           int *err);
  81extern void                             icmpv6_cleanup(void);
  82extern void                             icmpv6_param_prob(struct sk_buff *skb,
  83                                                          u8 code, int pos);
  84
  85struct flowi6;
  86struct in6_addr;
  87extern void                             icmpv6_flow_init(struct sock *sk,
  88                                                         struct flowi6 *fl6,
  89                                                         u8 type,
  90                                                         const struct in6_addr *saddr,
  91                                                         const struct in6_addr *daddr,
  92                                                         int oif);
  93
  94static inline bool icmpv6_is_err(int type)
  95{
  96        switch (type) {
  97        case ICMPV6_DEST_UNREACH:
  98        case ICMPV6_PKT_TOOBIG:
  99        case ICMPV6_TIME_EXCEED:
 100        case ICMPV6_PARAMPROB:
 101                return true;
 102        }
 103
 104        return false;
 105}
 106
 107#endif
 108