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 19 static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb) 20 { 21 return (struct icmphdr *)skb_transport_header(skb); 22 } 23 24 static inline bool icmp_is_err(int type) 25 { 26 switch (type) { 27 case ICMP_DEST_UNREACH: 28 case ICMP_SOURCE_QUENCH: 29 case ICMP_REDIRECT: 30 case ICMP_TIME_EXCEEDED: 31 case ICMP_PARAMETERPROB: 32 return true; 33 } 34 35 return false; 36 } 37 38 #endif /* _LINUX_ICMP_H */ 39