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 */
63
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