include/net/icmp.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * INET     An implementation of the TCP/IP protocol suite for the LINUX
0004  *      operating system.  INET is implemented using the  BSD Socket
0005  *      interface as the means of communication with the user level.
0006  *
0007  *      Definitions for the ICMP module.
0008  *
0009  * Version: @(#)icmp.h  1.0.4   05/13/93
0010  *
0011  * Authors: Ross Biro
0012  *      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
0013  */
0014 #ifndef _ICMP_H
0015 #define _ICMP_H
0016
0017 #include <linux/icmp.h>
0018
0019 #include <net/inet_sock.h>
0020 #include <net/snmp.h>
0021 #include <net/ip.h>
0022
0023 struct icmp_err {
0024   int       errno;
0025   unsigned int  fatal:1;
0026 };
0027
0028 extern const struct icmp_err icmp_err_convert[];
0029 #define ICMP_INC_STATS(net, field)  SNMP_INC_STATS((net)->mib.icmp_statistics, field)
0030 #define __ICMP_INC_STATS(net, field)    __SNMP_INC_STATS((net)->mib.icmp_statistics, field)
0031 #define ICMPMSGOUT_INC_STATS(net, field)    SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field+256)
0032 #define ICMPMSGIN_INC_STATS(net, field)     SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field)
0033
0034 struct dst_entry;
0035 struct net_proto_family;
0036 struct sk_buff;
0037 struct net;
0038
0039 void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
0040          const struct ip_options *opt);
0041 static inline void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
0042 {
0043     __icmp_send(skb_in, type, code, info, &IPCB(skb_in)->opt);
0044 }
0045
0046 #if IS_ENABLED(CONFIG_NF_NAT)
0047 void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info);
0048 #else
0049 static inline void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info)
0050 {
0051     struct ip_options opts = { 0 };
0052     __icmp_send(skb_in, type, code, info, &opts);
0053 }
0054 #endif
0055
0056 int icmp_rcv(struct sk_buff *skb);
0057 int icmp_err(struct sk_buff *skb, u32 info);
0058 int icmp_init(void);
0059 void icmp_out_count(struct net *net, unsigned char type);
0060 bool icmp_build_probe(struct sk_buff *skb, struct icmphdr *icmphdr);
0061
0062 #endif  /* _ICMP_H */