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 protocol.
8  *
9  * Version:	@(#)icmp.h	1.0.3	04/28/93
10  *
11  * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12  */
13 #ifndef _LINUX_ICMP_H
14 #define	_LINUX_ICMP_H
15 
16 #include <linux/skbuff.h>
17 #include <uapi/linux/icmp.h>
18 #include <uapi/linux/errqueue.h>
19 
icmp_hdr(const struct sk_buff * skb)20 static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb)
21 {
22 	return (struct icmphdr *)skb_transport_header(skb);
23 }
24 
icmp_is_err(int type)25 static inline bool icmp_is_err(int type)
26 {
27 	switch (type) {
28 	case ICMP_DEST_UNREACH:
29 	case ICMP_SOURCE_QUENCH:
30 	case ICMP_REDIRECT:
31 	case ICMP_TIME_EXCEEDED:
32 	case ICMP_PARAMETERPROB:
33 		return true;
34 	}
35 
36 	return false;
37 }
38 
39 void ip_icmp_error_rfc4884(const struct sk_buff *skb,
40 			   struct sock_ee_data_rfc4884 *out,
41 			   int thlen, int off);
42 
43 #endif	/* _LINUX_ICMP_H */
44