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 61 #endif /* _ICMP_H */ 62