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
20 static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb)
21 {
22 return (struct icmphdr *)skb_transport_header(skb);
23 }
24
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
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