github.com/looshlee/beatles@v0.0.0-20220727174639-742810ab631c/bpf/include/linux/ip.h (about)

     1  /*
     2   * INET		An implementation of the TCP/IP protocol suite for the LINUX
     3   *		operating system.  INET is implemented using the  BSD Socket
     4   *		interface as the means of communication with the user level.
     5   *
     6   *		Definitions for the IP protocol.
     7   *
     8   * Version:	@(#)ip.h	1.0.2	04/28/93
     9   *
    10   * Authors:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
    11   *
    12   *		This program is free software; you can redistribute it and/or
    13   *		modify it under the terms of the GNU General Public License
    14   *		as published by the Free Software Foundation; either version
    15   *		2 of the License, or (at your option) any later version.
    16   */
    17  #ifndef _LINUX_IP_H
    18  #define _LINUX_IP_H
    19  
    20  #include <linux/type_mapper.h>
    21  #include <linux/in.h>
    22  
    23  #define IPTOS_TOS_MASK		0x1E
    24  #define IPTOS_TOS(tos)		((tos)&IPTOS_TOS_MASK)
    25  #define	IPTOS_LOWDELAY		0x10
    26  #define	IPTOS_THROUGHPUT	0x08
    27  #define	IPTOS_RELIABILITY	0x04
    28  #define	IPTOS_MINCOST		0x02
    29  
    30  #define IPTOS_PREC_MASK		0xE0
    31  #define IPTOS_PREC(tos)		((tos)&IPTOS_PREC_MASK)
    32  #define IPTOS_PREC_NETCONTROL           0xe0
    33  #define IPTOS_PREC_INTERNETCONTROL      0xc0
    34  #define IPTOS_PREC_CRITIC_ECP           0xa0
    35  #define IPTOS_PREC_FLASHOVERRIDE        0x80
    36  #define IPTOS_PREC_FLASH                0x60
    37  #define IPTOS_PREC_IMMEDIATE            0x40
    38  #define IPTOS_PREC_PRIORITY             0x20
    39  #define IPTOS_PREC_ROUTINE              0x00
    40  
    41  
    42  /* IP options */
    43  #define IPOPT_COPY		0x80
    44  #define IPOPT_CLASS_MASK	0x60
    45  #define IPOPT_NUMBER_MASK	0x1f
    46  
    47  #define	IPOPT_COPIED(o)		((o)&IPOPT_COPY)
    48  #define	IPOPT_CLASS(o)		((o)&IPOPT_CLASS_MASK)
    49  #define	IPOPT_NUMBER(o)		((o)&IPOPT_NUMBER_MASK)
    50  
    51  #define	IPOPT_CONTROL		0x00
    52  #define	IPOPT_RESERVED1		0x20
    53  #define	IPOPT_MEASUREMENT	0x40
    54  #define	IPOPT_RESERVED2		0x60
    55  
    56  #define IPOPT_END	(0 |IPOPT_CONTROL)
    57  #define IPOPT_NOOP	(1 |IPOPT_CONTROL)
    58  #define IPOPT_SEC	(2 |IPOPT_CONTROL|IPOPT_COPY)
    59  #define IPOPT_LSRR	(3 |IPOPT_CONTROL|IPOPT_COPY)
    60  #define IPOPT_TIMESTAMP	(4 |IPOPT_MEASUREMENT)
    61  #define IPOPT_CIPSO	(6 |IPOPT_CONTROL|IPOPT_COPY)
    62  #define IPOPT_RR	(7 |IPOPT_CONTROL)
    63  #define IPOPT_SID	(8 |IPOPT_CONTROL|IPOPT_COPY)
    64  #define IPOPT_SSRR	(9 |IPOPT_CONTROL|IPOPT_COPY)
    65  #define IPOPT_RA	(20|IPOPT_CONTROL|IPOPT_COPY)
    66  
    67  #define IPVERSION	4
    68  #define MAXTTL		255
    69  #define IPDEFTTL	64
    70  
    71  #define IPOPT_OPTVAL 0
    72  #define IPOPT_OLEN   1
    73  #define IPOPT_OFFSET 2
    74  #define IPOPT_MINOFF 4
    75  #define MAX_IPOPTLEN 40
    76  #define IPOPT_NOP IPOPT_NOOP
    77  #define IPOPT_EOL IPOPT_END
    78  #define IPOPT_TS  IPOPT_TIMESTAMP
    79  
    80  #define	IPOPT_TS_TSONLY		0		/* timestamps only */
    81  #define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
    82  #define	IPOPT_TS_PRESPEC	3		/* specified modules only */
    83  
    84  #define IPV4_BEET_PHMAXLEN 8
    85  
    86  struct iphdr {
    87  #if defined(__LITTLE_ENDIAN_BITFIELD)
    88  	__u8	ihl:4,
    89  		version:4;
    90  #elif defined (__BIG_ENDIAN_BITFIELD)
    91  	__u8	version:4,
    92    		ihl:4;
    93  #else
    94  #error	"Please fix <asm/byteorder.h>"
    95  #endif
    96  	__u8	tos;
    97  	__be16	tot_len;
    98  	__be16	id;
    99  	__be16	frag_off;
   100  	__u8	ttl;
   101  	__u8	protocol;
   102  	__sum16	check;
   103  	__be32	saddr;
   104  	__be32	daddr;
   105  	/*The options start here. */
   106  };
   107  
   108  
   109  struct ip_auth_hdr {
   110  	__u8  nexthdr;
   111  	__u8  hdrlen;		/* This one is measured in 32 bit units! */
   112  	__be16 reserved;
   113  	__be32 spi;
   114  	__be32 seq_no;		/* Sequence number */
   115  	__u8  auth_data[0];	/* Variable len but >=4. Mind the 64 bit alignment! */
   116  };
   117  
   118  struct ip_esp_hdr {
   119  	__be32 spi;
   120  	__be32 seq_no;		/* Sequence number */
   121  	__u8  enc_data[0];	/* Variable len but >=8. Mind the 64 bit alignment! */
   122  };
   123  
   124  struct ip_comp_hdr {
   125  	__u8 nexthdr;
   126  	__u8 flags;
   127  	__be16 cpi;
   128  };
   129  
   130  struct ip_beet_phdr {
   131  	__u8 nexthdr;
   132  	__u8 hdrlen;
   133  	__u8 padlen;
   134  	__u8 reserved;
   135  };
   136  
   137  #endif /* _LINUX_IP_H */