1 /*
2  * INET		An implementation of the TCP/IP protocol suite for the LINUX
3  *		operating system.  INET is implemented using the  BSD Socket
4  *		interface as the means of communication with the user level.
5  *
6  *		Definitions for the ICMP module.
7  *
8  * Version:	@(#)icmp.h	1.0.4	05/13/93
9  *
10  * Authors:	Ross Biro
11  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12  *
13  *		This program is free software; you can redistribute it and/or
14  *		modify it under the terms of the GNU General Public License
15  *		as published by the Free Software Foundation; either version
16  *		2 of the License, or (at your option) any later version.
17  */
18 #ifndef _ICMP_H
19 #define	_ICMP_H
20 
21 #include <linux/icmp.h>
22 
23 #include <net/inet_sock.h>
24 #include <net/snmp.h>
25 #include <net/ip.h>
26 
27 struct icmp_err {
28   int		errno;
29   unsigned int	fatal:1;
30 };
31 
32 extern const struct icmp_err icmp_err_convert[];
33 #define ICMP_INC_STATS(net, field)	SNMP_INC_STATS((net)->mib.icmp_statistics, field)
34 #define __ICMP_INC_STATS(net, field)	__SNMP_INC_STATS((net)->mib.icmp_statistics, field)
35 #define ICMPMSGOUT_INC_STATS(net, field)	SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field+256)
36 #define ICMPMSGIN_INC_STATS(net, field)		SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field)
37 
38 struct dst_entry;
39 struct net_proto_family;
40 struct sk_buff;
41 struct net;
42 
43 void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
44 		 const struct ip_options *opt);
icmp_send(struct sk_buff * skb_in,int type,int code,__be32 info)45 static inline void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
46 {
47 	__icmp_send(skb_in, type, code, info, &IPCB(skb_in)->opt);
48 }
49 
50 #if IS_ENABLED(CONFIG_NF_NAT)
51 void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info);
52 #else
icmp_ndo_send(struct sk_buff * skb_in,int type,int code,__be32 info)53 static inline void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info)
54 {
55 	struct ip_options opts = { 0 };
56 	__icmp_send(skb_in, type, code, info, &opts);
57 }
58 #endif
59 
60 int icmp_rcv(struct sk_buff *skb);
61 void icmp_err(struct sk_buff *skb, u32 info);
62 int icmp_init(void);
63 void icmp_out_count(struct net *net, unsigned char type);
64 
65 #endif	/* _ICMP_H */
66