1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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 of the Internet Protocol.
8  *
9  * Version:	@(#)in.h	1.0.1	04/21/93
10  *
11  * Authors:	Original taken from the GNU Project <netinet/in.h> file.
12  *		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 #ifndef _UAPI_LINUX_IN_H
20 #define _UAPI_LINUX_IN_H
21 
22 #include <linux/types.h>
23 #include <linux/libc-compat.h>
24 #include <linux/socket.h>
25 
26 #if __UAPI_DEF_IN_IPPROTO
27 /* Standard well-defined IP protocols.  */
28 enum {
29   IPPROTO_IP = 0,		/* Dummy protocol for TCP		*/
30 #define IPPROTO_IP		IPPROTO_IP
31   IPPROTO_ICMP = 1,		/* Internet Control Message Protocol	*/
32 #define IPPROTO_ICMP		IPPROTO_ICMP
33   IPPROTO_IGMP = 2,		/* Internet Group Management Protocol	*/
34 #define IPPROTO_IGMP		IPPROTO_IGMP
35   IPPROTO_IPIP = 4,		/* IPIP tunnels (older KA9Q tunnels use 94) */
36 #define IPPROTO_IPIP		IPPROTO_IPIP
37   IPPROTO_TCP = 6,		/* Transmission Control Protocol	*/
38 #define IPPROTO_TCP		IPPROTO_TCP
39   IPPROTO_EGP = 8,		/* Exterior Gateway Protocol		*/
40 #define IPPROTO_EGP		IPPROTO_EGP
41   IPPROTO_PUP = 12,		/* PUP protocol				*/
42 #define IPPROTO_PUP		IPPROTO_PUP
43   IPPROTO_UDP = 17,		/* User Datagram Protocol		*/
44 #define IPPROTO_UDP		IPPROTO_UDP
45   IPPROTO_IDP = 22,		/* XNS IDP protocol			*/
46 #define IPPROTO_IDP		IPPROTO_IDP
47   IPPROTO_TP = 29,		/* SO Transport Protocol Class 4	*/
48 #define IPPROTO_TP		IPPROTO_TP
49   IPPROTO_DCCP = 33,		/* Datagram Congestion Control Protocol */
50 #define IPPROTO_DCCP		IPPROTO_DCCP
51   IPPROTO_IPV6 = 41,		/* IPv6-in-IPv4 tunnelling		*/
52 #define IPPROTO_IPV6		IPPROTO_IPV6
53   IPPROTO_RSVP = 46,		/* RSVP Protocol			*/
54 #define IPPROTO_RSVP		IPPROTO_RSVP
55   IPPROTO_GRE = 47,		/* Cisco GRE tunnels (rfc 1701,1702)	*/
56 #define IPPROTO_GRE		IPPROTO_GRE
57   IPPROTO_ESP = 50,		/* Encapsulation Security Payload protocol */
58 #define IPPROTO_ESP		IPPROTO_ESP
59   IPPROTO_AH = 51,		/* Authentication Header protocol	*/
60 #define IPPROTO_AH		IPPROTO_AH
61   IPPROTO_MTP = 92,		/* Multicast Transport Protocol		*/
62 #define IPPROTO_MTP		IPPROTO_MTP
63   IPPROTO_BEETPH = 94,		/* IP option pseudo header for BEET	*/
64 #define IPPROTO_BEETPH		IPPROTO_BEETPH
65   IPPROTO_ENCAP = 98,		/* Encapsulation Header			*/
66 #define IPPROTO_ENCAP		IPPROTO_ENCAP
67   IPPROTO_PIM = 103,		/* Protocol Independent Multicast	*/
68 #define IPPROTO_PIM		IPPROTO_PIM
69   IPPROTO_COMP = 108,		/* Compression Header Protocol		*/
70 #define IPPROTO_COMP		IPPROTO_COMP
71   IPPROTO_SCTP = 132,		/* Stream Control Transport Protocol	*/
72 #define IPPROTO_SCTP		IPPROTO_SCTP
73   IPPROTO_UDPLITE = 136,	/* UDP-Lite (RFC 3828)			*/
74 #define IPPROTO_UDPLITE		IPPROTO_UDPLITE
75   IPPROTO_MPLS = 137,		/* MPLS in IP (RFC 4023)		*/
76 #define IPPROTO_MPLS		IPPROTO_MPLS
77   IPPROTO_ETHERNET = 143,	/* Ethernet-within-IPv6 Encapsulation	*/
78 #define IPPROTO_ETHERNET	IPPROTO_ETHERNET
79   IPPROTO_RAW = 255,		/* Raw IP packets			*/
80 #define IPPROTO_RAW		IPPROTO_RAW
81   IPPROTO_MPTCP = 262,		/* Multipath TCP connection		*/
82 #define IPPROTO_MPTCP		IPPROTO_MPTCP
83   IPPROTO_MAX
84 };
85 #endif
86 
87 #if __UAPI_DEF_IN_ADDR
88 /* Internet address. */
89 struct in_addr {
90 	__be32	s_addr;
91 };
92 #endif
93 
94 #define IP_TOS		1
95 #define IP_TTL		2
96 #define IP_HDRINCL	3
97 #define IP_OPTIONS	4
98 #define IP_ROUTER_ALERT	5
99 #define IP_RECVOPTS	6
100 #define IP_RETOPTS	7
101 #define IP_PKTINFO	8
102 #define IP_PKTOPTIONS	9
103 #define IP_MTU_DISCOVER	10
104 #define IP_RECVERR	11
105 #define IP_RECVTTL	12
106 #define	IP_RECVTOS	13
107 #define IP_MTU		14
108 #define IP_FREEBIND	15
109 #define IP_IPSEC_POLICY	16
110 #define IP_XFRM_POLICY	17
111 #define IP_PASSSEC	18
112 #define IP_TRANSPARENT	19
113 
114 /* BSD compatibility */
115 #define IP_RECVRETOPTS	IP_RETOPTS
116 
117 /* TProxy original addresses */
118 #define IP_ORIGDSTADDR       20
119 #define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR
120 
121 #define IP_MINTTL       21
122 #define IP_NODEFRAG     22
123 #define IP_CHECKSUM	23
124 #define IP_BIND_ADDRESS_NO_PORT	24
125 #define IP_RECVFRAGSIZE	25
126 #define IP_RECVERR_RFC4884	26
127 
128 /* IP_MTU_DISCOVER values */
129 #define IP_PMTUDISC_DONT		0	/* Never send DF frames */
130 #define IP_PMTUDISC_WANT		1	/* Use per route hints	*/
131 #define IP_PMTUDISC_DO			2	/* Always DF		*/
132 #define IP_PMTUDISC_PROBE		3       /* Ignore dst pmtu      */
133 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
134  * Also incoming ICMP frag_needed notifications will be ignored on
135  * this socket to prevent accepting spoofed ones.
136  */
137 #define IP_PMTUDISC_INTERFACE		4
138 /* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
139  * fragmented if they exeed the interface mtu
140  */
141 #define IP_PMTUDISC_OMIT		5
142 
143 #define IP_MULTICAST_IF			32
144 #define IP_MULTICAST_TTL 		33
145 #define IP_MULTICAST_LOOP 		34
146 #define IP_ADD_MEMBERSHIP		35
147 #define IP_DROP_MEMBERSHIP		36
148 #define IP_UNBLOCK_SOURCE		37
149 #define IP_BLOCK_SOURCE			38
150 #define IP_ADD_SOURCE_MEMBERSHIP	39
151 #define IP_DROP_SOURCE_MEMBERSHIP	40
152 #define IP_MSFILTER			41
153 #define MCAST_JOIN_GROUP		42
154 #define MCAST_BLOCK_SOURCE		43
155 #define MCAST_UNBLOCK_SOURCE		44
156 #define MCAST_LEAVE_GROUP		45
157 #define MCAST_JOIN_SOURCE_GROUP		46
158 #define MCAST_LEAVE_SOURCE_GROUP	47
159 #define MCAST_MSFILTER			48
160 #define IP_MULTICAST_ALL		49
161 #define IP_UNICAST_IF			50
162 
163 #define MCAST_EXCLUDE	0
164 #define MCAST_INCLUDE	1
165 
166 /* These need to appear somewhere around here */
167 #define IP_DEFAULT_MULTICAST_TTL        1
168 #define IP_DEFAULT_MULTICAST_LOOP       1
169 
170 /* Request struct for multicast socket ops */
171 
172 #if __UAPI_DEF_IP_MREQ
173 struct ip_mreq  {
174 	struct in_addr imr_multiaddr;	/* IP multicast address of group */
175 	struct in_addr imr_interface;	/* local IP address of interface */
176 };
177 
178 struct ip_mreqn {
179 	struct in_addr	imr_multiaddr;		/* IP multicast address of group */
180 	struct in_addr	imr_address;		/* local IP address of interface */
181 	int		imr_ifindex;		/* Interface index */
182 };
183 
184 struct ip_mreq_source {
185 	__be32		imr_multiaddr;
186 	__be32		imr_interface;
187 	__be32		imr_sourceaddr;
188 };
189 
190 struct ip_msfilter {
191 	union {
192 		struct {
193 			__be32		imsf_multiaddr_aux;
194 			__be32		imsf_interface_aux;
195 			__u32		imsf_fmode_aux;
196 			__u32		imsf_numsrc_aux;
197 			__be32		imsf_slist[1];
198 		};
199 		struct {
200 			__be32		imsf_multiaddr;
201 			__be32		imsf_interface;
202 			__u32		imsf_fmode;
203 			__u32		imsf_numsrc;
204 			__be32		imsf_slist_flex[];
205 		};
206 	};
207 };
208 
209 #define IP_MSFILTER_SIZE(numsrc) \
210 	(sizeof(struct ip_msfilter) - sizeof(__u32) \
211 	+ (numsrc) * sizeof(__u32))
212 
213 struct group_req {
214 	__u32				 gr_interface;	/* interface index */
215 	struct __kernel_sockaddr_storage gr_group;	/* group address */
216 };
217 
218 struct group_source_req {
219 	__u32				 gsr_interface;	/* interface index */
220 	struct __kernel_sockaddr_storage gsr_group;	/* group address */
221 	struct __kernel_sockaddr_storage gsr_source;	/* source address */
222 };
223 
224 struct group_filter {
225 	union {
226 		struct {
227 			__u32				 gf_interface_aux; /* interface index */
228 			struct __kernel_sockaddr_storage gf_group_aux;	   /* multicast address */
229 			__u32				 gf_fmode_aux;	   /* filter mode */
230 			__u32				 gf_numsrc_aux;	   /* number of sources */
231 			struct __kernel_sockaddr_storage gf_slist[1];	   /* interface index */
232 		};
233 		struct {
234 			__u32				 gf_interface;	  /* interface index */
235 			struct __kernel_sockaddr_storage gf_group;	  /* multicast address */
236 			__u32				 gf_fmode;	  /* filter mode */
237 			__u32				 gf_numsrc;	  /* number of sources */
238 			struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
239 		};
240 	};
241 };
242 
243 #define GROUP_FILTER_SIZE(numsrc) \
244 	(sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
245 	+ (numsrc) * sizeof(struct __kernel_sockaddr_storage))
246 #endif
247 
248 #if __UAPI_DEF_IN_PKTINFO
249 struct in_pktinfo {
250 	int		ipi_ifindex;
251 	struct in_addr	ipi_spec_dst;
252 	struct in_addr	ipi_addr;
253 };
254 #endif
255 
256 /* Structure describing an Internet (IP) socket address. */
257 #if  __UAPI_DEF_SOCKADDR_IN
258 #define __SOCK_SIZE__	16		/* sizeof(struct sockaddr)	*/
259 struct sockaddr_in {
260   __kernel_sa_family_t	sin_family;	/* Address family		*/
261   __be16		sin_port;	/* Port number			*/
262   struct in_addr	sin_addr;	/* Internet address		*/
263 
264   /* Pad to size of `struct sockaddr'. */
265   unsigned char		__pad[__SOCK_SIZE__ - sizeof(short int) -
266 			sizeof(unsigned short int) - sizeof(struct in_addr)];
267 };
268 #define sin_zero	__pad		/* for BSD UNIX comp. -FvK	*/
269 #endif
270 
271 #if __UAPI_DEF_IN_CLASS
272 /*
273  * Definitions of the bits in an Internet address integer.
274  * On subnets, host and network parts are found according
275  * to the subnet mask, not these masks.
276  */
277 #define	IN_CLASSA(a)		((((long int) (a)) & 0x80000000) == 0)
278 #define	IN_CLASSA_NET		0xff000000
279 #define	IN_CLASSA_NSHIFT	24
280 #define	IN_CLASSA_HOST		(0xffffffff & ~IN_CLASSA_NET)
281 #define	IN_CLASSA_MAX		128
282 
283 #define	IN_CLASSB(a)		((((long int) (a)) & 0xc0000000) == 0x80000000)
284 #define	IN_CLASSB_NET		0xffff0000
285 #define	IN_CLASSB_NSHIFT	16
286 #define	IN_CLASSB_HOST		(0xffffffff & ~IN_CLASSB_NET)
287 #define	IN_CLASSB_MAX		65536
288 
289 #define	IN_CLASSC(a)		((((long int) (a)) & 0xe0000000) == 0xc0000000)
290 #define	IN_CLASSC_NET		0xffffff00
291 #define	IN_CLASSC_NSHIFT	8
292 #define	IN_CLASSC_HOST		(0xffffffff & ~IN_CLASSC_NET)
293 
294 #define	IN_CLASSD(a)		((((long int) (a)) & 0xf0000000) == 0xe0000000)
295 #define	IN_MULTICAST(a)		IN_CLASSD(a)
296 #define	IN_MULTICAST_NET	0xe0000000
297 
298 #define	IN_BADCLASS(a)		(((long int) (a) ) == (long int)0xffffffff)
299 #define	IN_EXPERIMENTAL(a)	IN_BADCLASS((a))
300 
301 #define	IN_CLASSE(a)		((((long int) (a)) & 0xf0000000) == 0xf0000000)
302 #define	IN_CLASSE_NET		0xffffffff
303 #define	IN_CLASSE_NSHIFT	0
304 
305 /* Address to accept any incoming messages. */
306 #define	INADDR_ANY		((unsigned long int) 0x00000000)
307 
308 /* Address to send to all hosts. */
309 #define	INADDR_BROADCAST	((unsigned long int) 0xffffffff)
310 
311 /* Address indicating an error return. */
312 #define	INADDR_NONE		((unsigned long int) 0xffffffff)
313 
314 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
315 #define	INADDR_DUMMY		((unsigned long int) 0xc0000008)
316 
317 /* Network number for local host loopback. */
318 #define	IN_LOOPBACKNET		127
319 
320 /* Address to loopback in software to local host.  */
321 #define	INADDR_LOOPBACK		0x7f000001	/* 127.0.0.1   */
322 #define	IN_LOOPBACK(a)		((((long int) (a)) & 0xff000000) == 0x7f000000)
323 
324 /* Defines for Multicast INADDR */
325 #define INADDR_UNSPEC_GROUP		0xe0000000U	/* 224.0.0.0   */
326 #define INADDR_ALLHOSTS_GROUP		0xe0000001U	/* 224.0.0.1   */
327 #define INADDR_ALLRTRS_GROUP		0xe0000002U	/* 224.0.0.2 */
328 #define INADDR_ALLSNOOPERS_GROUP	0xe000006aU	/* 224.0.0.106 */
329 #define INADDR_MAX_LOCAL_GROUP		0xe00000ffU	/* 224.0.0.255 */
330 #endif
331 
332 /* <asm/byteorder.h> contains the htonl type stuff.. */
333 #include <asm/byteorder.h>
334 
335 
336 #endif /* _UAPI_LINUX_IN_H */
337