include/net/icmp.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4  *              operating system.  INET is implemented using the  BSD Socket
   5  *              interface as the means of communication with the user level.
   6  *
   7  *              Definitions for the ICMP module.
   8  *
   9  * Version:     @(#)icmp.h      1.0.4   05/13/93
  10  *
  11  * Authors:     Ross Biro
  12  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  13  */
  14 #ifndef _ICMP_H
  15 #define _ICMP_H
  16
  17 #include <linux/icmp.h>
  18
  19 #include <net/inet_sock.h>
  20 #include <net/snmp.h>
  21 #include <net/ip.h>
  22
  23 struct icmp_err {
  24   int           errno;
  25   unsigned int  fatal:1;
  26 };
  27
  28 extern const struct icmp_err icmp_err_convert[];
  29 #define ICMP_INC_STATS(net, field)      SNMP_INC_STATS((net)->mib.icmp_statistics, field)
  30 #define __ICMP_INC_STATS(net, field)    __SNMP_INC_STATS((net)->mib.icmp_statistics, field)
  31 #define ICMPMSGOUT_INC_STATS(net, field)        SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field+256)
  32 #define ICMPMSGIN_INC_STATS(net, field)         SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field)
  33
  34 struct dst_entry;
  35 struct net_proto_family;
  36 struct sk_buff;
  37 struct net;
  38
  39 void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
  40                  const struct ip_options *opt);
  41 static inline void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
  42 {
  43         __icmp_send(skb_in, type, code, info, &IPCB(skb_in)->opt);
  44 }
  45
  46 #if IS_ENABLED(CONFIG_NF_NAT)
  47 void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info);
  48 #else
  49 static inline void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info)
  50 {
  51         struct ip_options opts = { 0 };
  52         __icmp_send(skb_in, type, code, info, &opts);
  53 }
  54 #endif
  55
  56 int icmp_rcv(struct sk_buff *skb);
  57 int icmp_err(struct sk_buff *skb, u32 info);
  58 int icmp_init(void);
  59 void icmp_out_count(struct net *net, unsigned char type);
  60 bool icmp_build_probe(struct sk_buff *skb, struct icmphdr *icmphdr);
  61
  62 #endif  /* _ICMP_H */