github.com/cilium/cilium@v1.16.2/bpf/include/linux/icmp.h (about)

     1  /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2  /* Copyright Authors of the Linux kernel */
     3  /*
     4   * INET		An implementation of the TCP/IP protocol suite for the LINUX
     5   *		operating system.  INET is implemented using the  BSD Socket
     6   *		interface as the means of communication with the user level.
     7   *
     8   *		Definitions for the ICMP protocol.
     9   *
    10   * Version:	@(#)icmp.h	1.0.3	04/28/93
    11   *
    12   * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
    13   *
    14   *		This program is free software; you can redistribute it and/or
    15   *		modify it under the terms of the GNU General Public License
    16   *		as published by the Free Software Foundation; either version
    17   *		2 of the License, or (at your option) any later version.
    18   */
    19  #pragma once
    20  
    21  #include <linux/types.h>
    22  
    23  #define ICMP_ECHOREPLY		0	/* Echo Reply			*/
    24  #define ICMP_DEST_UNREACH	3	/* Destination Unreachable	*/
    25  #define ICMP_SOURCE_QUENCH	4	/* Source Quench		*/
    26  #define ICMP_REDIRECT		5	/* Redirect (change route)	*/
    27  #define ICMP_ECHO		8	/* Echo Request			*/
    28  #define ICMP_TIME_EXCEEDED	11	/* Time Exceeded		*/
    29  #define ICMP_PARAMETERPROB	12	/* Parameter Problem		*/
    30  #define ICMP_TIMESTAMP		13	/* Timestamp Request		*/
    31  #define ICMP_TIMESTAMPREPLY	14	/* Timestamp Reply		*/
    32  #define ICMP_INFO_REQUEST	15	/* Information Request		*/
    33  #define ICMP_INFO_REPLY		16	/* Information Reply		*/
    34  #define ICMP_ADDRESS		17	/* Address Mask Request		*/
    35  #define ICMP_ADDRESSREPLY	18	/* Address Mask Reply		*/
    36  #define NR_ICMP_TYPES		18
    37  
    38  
    39  /* Codes for UNREACH. */
    40  #define ICMP_NET_UNREACH	0	/* Network Unreachable		*/
    41  #define ICMP_HOST_UNREACH	1	/* Host Unreachable		*/
    42  #define ICMP_PROT_UNREACH	2	/* Protocol Unreachable		*/
    43  #define ICMP_PORT_UNREACH	3	/* Port Unreachable		*/
    44  #define ICMP_FRAG_NEEDED	4	/* Fragmentation Needed/DF set	*/
    45  #define ICMP_SR_FAILED		5	/* Source Route failed		*/
    46  #define ICMP_NET_UNKNOWN	6
    47  #define ICMP_HOST_UNKNOWN	7
    48  #define ICMP_HOST_ISOLATED	8
    49  #define ICMP_NET_ANO		9
    50  #define ICMP_HOST_ANO		10
    51  #define ICMP_NET_UNR_TOS	11
    52  #define ICMP_HOST_UNR_TOS	12
    53  #define ICMP_PKT_FILTERED	13	/* Packet filtered */
    54  #define ICMP_PREC_VIOLATION	14	/* Precedence violation */
    55  #define ICMP_PREC_CUTOFF	15	/* Precedence cut off */
    56  #define NR_ICMP_UNREACH		15	/* instead of hardcoding immediate value */
    57  
    58  /* Codes for REDIRECT. */
    59  #define ICMP_REDIR_NET		0	/* Redirect Net			*/
    60  #define ICMP_REDIR_HOST		1	/* Redirect Host		*/
    61  #define ICMP_REDIR_NETTOS	2	/* Redirect Net for TOS		*/
    62  #define ICMP_REDIR_HOSTTOS	3	/* Redirect Host for TOS	*/
    63  
    64  /* Codes for TIME_EXCEEDED. */
    65  #define ICMP_EXC_TTL		0	/* TTL count exceeded		*/
    66  #define ICMP_EXC_FRAGTIME	1	/* Fragment Reass time exceeded	*/
    67  
    68  
    69  struct icmphdr {
    70    __u8		type;
    71    __u8		code;
    72    __sum16	checksum;
    73    union {
    74  	struct {
    75  		__be16	id;
    76  		__be16	sequence;
    77  	} echo;
    78  	__be32	gateway;
    79  	struct {
    80  		__be16	__unused;
    81  		__be16	mtu;
    82  	} frag;
    83    } un;
    84  };
    85  
    86  
    87  /*
    88   *	constants for (set|get)sockopt
    89   */
    90  
    91  #define ICMP_FILTER			1
    92  
    93  struct icmp_filter {
    94  	__u32		data;
    95  };