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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 of the Internet Protocol.
7  *
8  * Version:	@(#)in.h	1.0.1	04/21/93
9  *
10  * Authors:	Original taken from the GNU Project <netinet/in.h> file.
11  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12  *
13  *		This program is free software; you can redistribute it and/or
14  *		modify it under the terms of the GNU General Public License
15  *		as published by the Free Software Foundation; either version
16  *		2 of the License, or (at your option) any later version.
17  */
18 #ifndef _LINUX_IN_H
19 #define _LINUX_IN_H
20 
21 #include <linux/types.h>
22 #include <linux/libc-compat.h>
23 #include <linux/socket.h>
24 
25 #if __UAPI_DEF_IN_IPPROTO
26 /* Standard well-defined IP protocols.  */
27 enum {
28   IPPROTO_IP = 0,		/* Dummy protocol for TCP		*/
29 #define IPPROTO_IP		IPPROTO_IP
30   IPPROTO_ICMP = 1,		/* Internet Control Message Protocol	*/
31 #define IPPROTO_ICMP		IPPROTO_ICMP
32   IPPROTO_IGMP = 2,		/* Internet Group Management Protocol	*/
33 #define IPPROTO_IGMP		IPPROTO_IGMP
34   IPPROTO_IPIP = 4,		/* IPIP tunnels (older KA9Q tunnels use 94) */
35 #define IPPROTO_IPIP		IPPROTO_IPIP
36   IPPROTO_TCP = 6,		/* Transmission Control Protocol	*/
37 #define IPPROTO_TCP		IPPROTO_TCP
38   IPPROTO_EGP = 8,		/* Exterior Gateway Protocol		*/
39 #define IPPROTO_EGP		IPPROTO_EGP
40   IPPROTO_PUP = 12,		/* PUP protocol				*/
41 #define IPPROTO_PUP		IPPROTO_PUP
42   IPPROTO_UDP = 17,		/* User Datagram Protocol		*/
43 #define IPPROTO_UDP		IPPROTO_UDP
44   IPPROTO_IDP = 22,		/* XNS IDP protocol			*/
45 #define IPPROTO_IDP		IPPROTO_IDP
46   IPPROTO_TP = 29,		/* SO Transport Protocol Class 4	*/
47 #define IPPROTO_TP		IPPROTO_TP
48   IPPROTO_DCCP = 33,		/* Datagram Congestion Control Protocol */
49 #define IPPROTO_DCCP		IPPROTO_DCCP
50   IPPROTO_IPV6 = 41,		/* IPv6-in-IPv4 tunnelling		*/
51 #define IPPROTO_IPV6		IPPROTO_IPV6
52   IPPROTO_RSVP = 46,		/* RSVP Protocol			*/
53 #define IPPROTO_RSVP		IPPROTO_RSVP
54   IPPROTO_GRE = 47,		/* Cisco GRE tunnels (rfc 1701,1702)	*/
55 #define IPPROTO_GRE		IPPROTO_GRE
56   IPPROTO_ESP = 50,		/* Encapsulation Security Payload protocol */
57 #define IPPROTO_ESP		IPPROTO_ESP
58   IPPROTO_AH = 51,		/* Authentication Header protocol	*/
59 #define IPPROTO_AH		IPPROTO_AH
60   IPPROTO_MTP = 92,		/* Multicast Transport Protocol		*/
61 #define IPPROTO_MTP		IPPROTO_MTP
62   IPPROTO_BEETPH = 94,		/* IP option pseudo header for BEET	*/
63 #define IPPROTO_BEETPH		IPPROTO_BEETPH
64   IPPROTO_ENCAP = 98,		/* Encapsulation Header			*/
65 #define IPPROTO_ENCAP		IPPROTO_ENCAP
66   IPPROTO_PIM = 103,		/* Protocol Independent Multicast	*/
67 #define IPPROTO_PIM		IPPROTO_PIM
68   IPPROTO_COMP = 108,		/* Compression Header Protocol		*/
69 #define IPPROTO_COMP		IPPROTO_COMP
70   IPPROTO_SCTP = 132,		/* Stream Control Transport Protocol	*/
71 #define IPPROTO_SCTP		IPPROTO_SCTP
72   IPPROTO_UDPLITE = 136,	/* UDP-Lite (RFC 3828)			*/
73 #define IPPROTO_UDPLITE		IPPROTO_UDPLITE
74   IPPROTO_MPLS = 137,		/* MPLS in IP (RFC 4023)		*/
75 #define IPPROTO_MPLS		IPPROTO_MPLS
76   IPPROTO_RAW = 255,		/* Raw IP packets			*/
77 #define IPPROTO_RAW		IPPROTO_RAW
78   IPPROTO_MAX
79 };
80 #endif
81 
82 #if __UAPI_DEF_IN_ADDR
83 /* Internet address. */
84 struct in_addr {
85 	__be32	s_addr;
86 };
87 #endif
88 
89 #define IP_TOS		1
90 #define IP_TTL		2
91 #define IP_HDRINCL	3
92 #define IP_OPTIONS	4
93 #define IP_ROUTER_ALERT	5
94 #define IP_RECVOPTS	6
95 #define IP_RETOPTS	7
96 #define IP_PKTINFO	8
97 #define IP_PKTOPTIONS	9
98 #define IP_MTU_DISCOVER	10
99 #define IP_RECVERR	11
100 #define IP_RECVTTL	12
101 #define	IP_RECVTOS	13
102 #define IP_MTU		14
103 #define IP_FREEBIND	15
104 #define IP_IPSEC_POLICY	16
105 #define IP_XFRM_POLICY	17
106 #define IP_PASSSEC	18
107 #define IP_TRANSPARENT	19
108 
109 /* BSD compatibility */
110 #define IP_RECVRETOPTS	IP_RETOPTS
111 
112 /* TProxy original addresses */
113 #define IP_ORIGDSTADDR       20
114 #define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR
115 
116 #define IP_MINTTL       21
117 #define IP_NODEFRAG     22
118 #define IP_CHECKSUM	23
119 #define IP_BIND_ADDRESS_NO_PORT	24
120 
121 /* IP_MTU_DISCOVER values */
122 #define IP_PMTUDISC_DONT		0	/* Never send DF frames */
123 #define IP_PMTUDISC_WANT		1	/* Use per route hints	*/
124 #define IP_PMTUDISC_DO			2	/* Always DF		*/
125 #define IP_PMTUDISC_PROBE		3       /* Ignore dst pmtu      */
126 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
127  * Also incoming ICMP frag_needed notifications will be ignored on
128  * this socket to prevent accepting spoofed ones.
129  */
130 #define IP_PMTUDISC_INTERFACE		4
131 /* weaker version of IP_PMTUDISC_INTERFACE, which allos packets to get
132  * fragmented if they exeed the interface mtu
133  */
134 #define IP_PMTUDISC_OMIT		5
135 
136 #define IP_MULTICAST_IF			32
137 #define IP_MULTICAST_TTL 		33
138 #define IP_MULTICAST_LOOP 		34
139 #define IP_ADD_MEMBERSHIP		35
140 #define IP_DROP_MEMBERSHIP		36
141 #define IP_UNBLOCK_SOURCE		37
142 #define IP_BLOCK_SOURCE			38
143 #define IP_ADD_SOURCE_MEMBERSHIP	39
144 #define IP_DROP_SOURCE_MEMBERSHIP	40
145 #define IP_MSFILTER			41
146 #define MCAST_JOIN_GROUP		42
147 #define MCAST_BLOCK_SOURCE		43
148 #define MCAST_UNBLOCK_SOURCE		44
149 #define MCAST_LEAVE_GROUP		45
150 #define MCAST_JOIN_SOURCE_GROUP		46
151 #define MCAST_LEAVE_SOURCE_GROUP	47
152 #define MCAST_MSFILTER			48
153 #define IP_MULTICAST_ALL		49
154 #define IP_UNICAST_IF			50
155 
156 #define MCAST_EXCLUDE	0
157 #define MCAST_INCLUDE	1
158 
159 /* These need to appear somewhere around here */
160 #define IP_DEFAULT_MULTICAST_TTL        1
161 #define IP_DEFAULT_MULTICAST_LOOP       1
162 
163 /* Request struct for multicast socket ops */
164 
165 #if __UAPI_DEF_IP_MREQ
166 struct ip_mreq  {
167 	struct in_addr imr_multiaddr;	/* IP multicast address of group */
168 	struct in_addr imr_interface;	/* local IP address of interface */
169 };
170 
171 struct ip_mreqn {
172 	struct in_addr	imr_multiaddr;		/* IP multicast address of group */
173 	struct in_addr	imr_address;		/* local IP address of interface */
174 	int		imr_ifindex;		/* Interface index */
175 };
176 
177 struct ip_mreq_source {
178 	__be32		imr_multiaddr;
179 	__be32		imr_interface;
180 	__be32		imr_sourceaddr;
181 };
182 
183 struct ip_msfilter {
184 	__be32		imsf_multiaddr;
185 	__be32		imsf_interface;
186 	__u32		imsf_fmode;
187 	__u32		imsf_numsrc;
188 	__be32		imsf_slist[1];
189 };
190 
191 #define IP_MSFILTER_SIZE(numsrc) \
192 	(sizeof(struct ip_msfilter) - sizeof(__u32) \
193 	+ (numsrc) * sizeof(__u32))
194 
195 struct group_req {
196 	__u32				 gr_interface;	/* interface index */
197 	struct __kernel_sockaddr_storage gr_group;	/* group address */
198 };
199 
200 struct group_source_req {
201 	__u32				 gsr_interface;	/* interface index */
202 	struct __kernel_sockaddr_storage gsr_group;	/* group address */
203 	struct __kernel_sockaddr_storage gsr_source;	/* source address */
204 };
205 
206 struct group_filter {
207 	__u32				 gf_interface;	/* interface index */
208 	struct __kernel_sockaddr_storage gf_group;	/* multicast address */
209 	__u32				 gf_fmode;	/* filter mode */
210 	__u32				 gf_numsrc;	/* number of sources */
211 	struct __kernel_sockaddr_storage gf_slist[1];	/* interface index */
212 };
213 
214 #define GROUP_FILTER_SIZE(numsrc) \
215 	(sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
216 	+ (numsrc) * sizeof(struct __kernel_sockaddr_storage))
217 #endif
218 
219 #if __UAPI_DEF_IN_PKTINFO
220 struct in_pktinfo {
221 	int		ipi_ifindex;
222 	struct in_addr	ipi_spec_dst;
223 	struct in_addr	ipi_addr;
224 };
225 #endif
226 
227 /* Structure describing an Internet (IP) socket address. */
228 #if  __UAPI_DEF_SOCKADDR_IN
229 #define __SOCK_SIZE__	16		/* sizeof(struct sockaddr)	*/
230 struct sockaddr_in {
231   __kernel_sa_family_t	sin_family;	/* Address family		*/
232   __be16		sin_port;	/* Port number			*/
233   struct in_addr	sin_addr;	/* Internet address		*/
234 
235   /* Pad to size of `struct sockaddr'. */
236   unsigned char		__pad[__SOCK_SIZE__ - sizeof(short int) -
237 			sizeof(unsigned short int) - sizeof(struct in_addr)];
238 };
239 #define sin_zero	__pad		/* for BSD UNIX comp. -FvK	*/
240 #endif
241 
242 #if __UAPI_DEF_IN_CLASS
243 /*
244  * Definitions of the bits in an Internet address integer.
245  * On subnets, host and network parts are found according
246  * to the subnet mask, not these masks.
247  */
248 #define	IN_CLASSA(a)		((((long int) (a)) & 0x80000000) == 0)
249 #define	IN_CLASSA_NET		0xff000000
250 #define	IN_CLASSA_NSHIFT	24
251 #define	IN_CLASSA_HOST		(0xffffffff & ~IN_CLASSA_NET)
252 #define	IN_CLASSA_MAX		128
253 
254 #define	IN_CLASSB(a)		((((long int) (a)) & 0xc0000000) == 0x80000000)
255 #define	IN_CLASSB_NET		0xffff0000
256 #define	IN_CLASSB_NSHIFT	16
257 #define	IN_CLASSB_HOST		(0xffffffff & ~IN_CLASSB_NET)
258 #define	IN_CLASSB_MAX		65536
259 
260 #define	IN_CLASSC(a)		((((long int) (a)) & 0xe0000000) == 0xc0000000)
261 #define	IN_CLASSC_NET		0xffffff00
262 #define	IN_CLASSC_NSHIFT	8
263 #define	IN_CLASSC_HOST		(0xffffffff & ~IN_CLASSC_NET)
264 
265 #define	IN_CLASSD(a)		((((long int) (a)) & 0xf0000000) == 0xe0000000)
266 #define	IN_MULTICAST(a)		IN_CLASSD(a)
267 #define IN_MULTICAST_NET	0xF0000000
268 
269 #define	IN_EXPERIMENTAL(a)	((((long int) (a)) & 0xf0000000) == 0xf0000000)
270 #define	IN_BADCLASS(a)		IN_EXPERIMENTAL((a))
271 
272 /* Address to accept any incoming messages. */
273 #define	INADDR_ANY		((unsigned long int) 0x00000000)
274 
275 /* Address to send to all hosts. */
276 #define	INADDR_BROADCAST	((unsigned long int) 0xffffffff)
277 
278 /* Address indicating an error return. */
279 #define	INADDR_NONE		((unsigned long int) 0xffffffff)
280 
281 /* Network number for local host loopback. */
282 #define	IN_LOOPBACKNET		127
283 
284 /* Address to loopback in software to local host.  */
285 #define	INADDR_LOOPBACK		0x7f000001	/* 127.0.0.1   */
286 #define	IN_LOOPBACK(a)		((((long int) (a)) & 0xff000000) == 0x7f000000)
287 
288 /* Defines for Multicast INADDR */
289 #define INADDR_UNSPEC_GROUP   	0xe0000000U	/* 224.0.0.0   */
290 #define INADDR_ALLHOSTS_GROUP 	0xe0000001U	/* 224.0.0.1   */
291 #define INADDR_ALLRTRS_GROUP    0xe0000002U	/* 224.0.0.2 */
292 #define INADDR_MAX_LOCAL_GROUP  0xe00000ffU	/* 224.0.0.255 */
293 #endif
294 
295 /* <asm/byteorder.h> contains the htonl type stuff.. */
296 #include <asm/byteorder.h>
297 
298 
299 #endif /* _LINUX_IN_H */
300