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.
6 * Definitions for the IP protocol.
8 * Version: @(#)ip.h 1.0.2 04/28/93
10 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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.
19 #include <linux/types.h>
20 #include <asm/byteorder.h>
22 #define IPTOS_TOS_MASK 0x1E
23 #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
24 #define IPTOS_LOWDELAY 0x10
25 #define IPTOS_THROUGHPUT 0x08
26 #define IPTOS_RELIABILITY 0x04
27 #define IPTOS_MINCOST 0x02
29 #define IPTOS_PREC_MASK 0xE0
30 #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
31 #define IPTOS_PREC_NETCONTROL 0xe0
32 #define IPTOS_PREC_INTERNETCONTROL 0xc0
33 #define IPTOS_PREC_CRITIC_ECP 0xa0
34 #define IPTOS_PREC_FLASHOVERRIDE 0x80
35 #define IPTOS_PREC_FLASH 0x60
36 #define IPTOS_PREC_IMMEDIATE 0x40
37 #define IPTOS_PREC_PRIORITY 0x20
38 #define IPTOS_PREC_ROUTINE 0x00
42 #define IPOPT_COPY 0x80
43 #define IPOPT_CLASS_MASK 0x60
44 #define IPOPT_NUMBER_MASK 0x1f
46 #define IPOPT_COPIED(o) ((o)&IPOPT_COPY)
47 #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK)
48 #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK)
50 #define IPOPT_CONTROL 0x00
51 #define IPOPT_RESERVED1 0x20
52 #define IPOPT_MEASUREMENT 0x40
53 #define IPOPT_RESERVED2 0x60
55 #define IPOPT_END (0 |IPOPT_CONTROL)
56 #define IPOPT_NOOP (1 |IPOPT_CONTROL)
57 #define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY)
58 #define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY)
59 #define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT)
60 #define IPOPT_CIPSO (6 |IPOPT_CONTROL|IPOPT_COPY)
61 #define IPOPT_RR (7 |IPOPT_CONTROL)
62 #define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY)
63 #define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY)
64 #define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY)
70 #define IPOPT_OPTVAL 0
72 #define IPOPT_OFFSET 2
73 #define IPOPT_MINOFF 4
74 #define MAX_IPOPTLEN 40
75 #define IPOPT_NOP IPOPT_NOOP
76 #define IPOPT_EOL IPOPT_END
77 #define IPOPT_TS IPOPT_TIMESTAMP
79 #define IPOPT_TS_TSONLY 0 /* timestamps only */
80 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
81 #define IPOPT_TS_PRESPEC 3 /* specified modules only */
83 #define IPV4_BEET_PHMAXLEN 8
86 #if defined(__LITTLE_ENDIAN_BITFIELD)
89 #elif defined (__BIG_ENDIAN_BITFIELD)
93 #error "Please fix <asm/byteorder.h>"
104 /*The options start here. */
108 #include <linux/skbuff.h>
110 static inline struct iphdr
*ip_hdr(const struct sk_buff
*skb
)
112 return (struct iphdr
*)skb_network_header(skb
);
115 static inline struct iphdr
*ipip_hdr(const struct sk_buff
*skb
)
117 return (struct iphdr
*)skb_transport_header(skb
);
123 __u8 hdrlen
; /* This one is measured in 32 bit units! */
126 __be32 seq_no
; /* Sequence number */
127 __u8 auth_data
[0]; /* Variable len but >=4. Mind the 64 bit alignment! */
132 __be32 seq_no
; /* Sequence number */
133 __u8 enc_data
[0]; /* Variable len but >=8. Mind the 64 bit alignment! */
142 struct ip_beet_phdr
{
149 #endif /* _LINUX_IP_H */
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