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_RAW = 255,		/* Raw IP packets			*/
78 #define IPPROTO_RAW		IPPROTO_RAW
79   IPPROTO_MAX
80 };
81 #endif
82 
83 #if __UAPI_DEF_IN_ADDR
84 /* Internet address. */
85 struct in_addr {
86 	__be32	s_addr;
87 };
88 #endif
89 
90 #define IP_TOS		1
91 #define IP_TTL		2
92 #define IP_HDRINCL	3
93 #define IP_OPTIONS	4
94 #define IP_ROUTER_ALERT	5
95 #define IP_RECVOPTS	6
96 #define IP_RETOPTS	7
97 #define IP_PKTINFO	8
98 #define IP_PKTOPTIONS	9
99 #define IP_MTU_DISCOVER	10
100 #define IP_RECVERR	11
101 #define IP_RECVTTL	12
102 #define	IP_RECVTOS	13
103 #define IP_MTU		14
104 #define IP_FREEBIND	15
105 #define IP_IPSEC_POLICY	16
106 #define IP_XFRM_POLICY	17
107 #define IP_PASSSEC	18
108 #define IP_TRANSPARENT	19
109 
110 /* BSD compatibility */
111 #define IP_RECVRETOPTS	IP_RETOPTS
112 
113 /* TProxy original addresses */
114 #define IP_ORIGDSTADDR       20
115 #define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR
116 
117 #define IP_MINTTL       21
118 #define IP_NODEFRAG     22
119 #define IP_CHECKSUM	23
120 #define IP_BIND_ADDRESS_NO_PORT	24
121 #define IP_RECVFRAGSIZE	25
122 
123 /* IP_MTU_DISCOVER values */
124 #define IP_PMTUDISC_DONT		0	/* Never send DF frames */
125 #define IP_PMTUDISC_WANT		1	/* Use per route hints	*/
126 #define IP_PMTUDISC_DO			2	/* Always DF		*/
127 #define IP_PMTUDISC_PROBE		3       /* Ignore dst pmtu      */
128 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
129  * Also incoming ICMP frag_needed notifications will be ignored on
130  * this socket to prevent accepting spoofed ones.
131  */
132 #define IP_PMTUDISC_INTERFACE		4
133 /* weaker version of IP_PMTUDISC_INTERFACE, which allos packets to get
134  * fragmented if they exeed the interface mtu
135  */
136 #define IP_PMTUDISC_OMIT		5
137 
138 #define IP_MULTICAST_IF			32
139 #define IP_MULTICAST_TTL 		33
140 #define IP_MULTICAST_LOOP 		34
141 #define IP_ADD_MEMBERSHIP		35
142 #define IP_DROP_MEMBERSHIP		36
143 #define IP_UNBLOCK_SOURCE		37
144 #define IP_BLOCK_SOURCE			38
145 #define IP_ADD_SOURCE_MEMBERSHIP	39
146 #define IP_DROP_SOURCE_MEMBERSHIP	40
147 #define IP_MSFILTER			41
148 #define MCAST_JOIN_GROUP		42
149 #define MCAST_BLOCK_SOURCE		43
150 #define MCAST_UNBLOCK_SOURCE		44
151 #define MCAST_LEAVE_GROUP		45
152 #define MCAST_JOIN_SOURCE_GROUP		46
153 #define MCAST_LEAVE_SOURCE_GROUP	47
154 #define MCAST_MSFILTER			48
155 #define IP_MULTICAST_ALL		49
156 #define IP_UNICAST_IF			50
157 #define IP_LOCAL_PORT_RANGE		51
158 #define IP_PROTOCOL			52
159 
160 #define MCAST_EXCLUDE	0
161 #define MCAST_INCLUDE	1
162 
163 /* These need to appear somewhere around here */
164 #define IP_DEFAULT_MULTICAST_TTL        1
165 #define IP_DEFAULT_MULTICAST_LOOP       1
166 
167 /* Request struct for multicast socket ops */
168 
169 #if __UAPI_DEF_IP_MREQ
170 struct ip_mreq  {
171 	struct in_addr imr_multiaddr;	/* IP multicast address of group */
172 	struct in_addr imr_interface;	/* local IP address of interface */
173 };
174 
175 struct ip_mreqn {
176 	struct in_addr	imr_multiaddr;		/* IP multicast address of group */
177 	struct in_addr	imr_address;		/* local IP address of interface */
178 	int		imr_ifindex;		/* Interface index */
179 };
180 
181 struct ip_mreq_source {
182 	__be32		imr_multiaddr;
183 	__be32		imr_interface;
184 	__be32		imr_sourceaddr;
185 };
186 
187 struct ip_msfilter {
188 	__be32		imsf_multiaddr;
189 	__be32		imsf_interface;
190 	__u32		imsf_fmode;
191 	__u32		imsf_numsrc;
192 	__be32		imsf_slist[1];
193 };
194 
195 #define IP_MSFILTER_SIZE(numsrc) \
196 	(sizeof(struct ip_msfilter) - sizeof(__u32) \
197 	+ (numsrc) * sizeof(__u32))
198 
199 struct group_req {
200 	__u32				 gr_interface;	/* interface index */
201 	struct __kernel_sockaddr_storage gr_group;	/* group address */
202 };
203 
204 struct group_source_req {
205 	__u32				 gsr_interface;	/* interface index */
206 	struct __kernel_sockaddr_storage gsr_group;	/* group address */
207 	struct __kernel_sockaddr_storage gsr_source;	/* source address */
208 };
209 
210 struct group_filter {
211 	__u32				 gf_interface;	/* interface index */
212 	struct __kernel_sockaddr_storage gf_group;	/* multicast address */
213 	__u32				 gf_fmode;	/* filter mode */
214 	__u32				 gf_numsrc;	/* number of sources */
215 	struct __kernel_sockaddr_storage gf_slist[1];	/* interface index */
216 };
217 
218 #define GROUP_FILTER_SIZE(numsrc) \
219 	(sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
220 	+ (numsrc) * sizeof(struct __kernel_sockaddr_storage))
221 #endif
222 
223 #if __UAPI_DEF_IN_PKTINFO
224 struct in_pktinfo {
225 	int		ipi_ifindex;
226 	struct in_addr	ipi_spec_dst;
227 	struct in_addr	ipi_addr;
228 };
229 #endif
230 
231 /* Structure describing an Internet (IP) socket address. */
232 #if  __UAPI_DEF_SOCKADDR_IN
233 #define __SOCK_SIZE__	16		/* sizeof(struct sockaddr)	*/
234 struct sockaddr_in {
235   __kernel_sa_family_t	sin_family;	/* Address family		*/
236   __be16		sin_port;	/* Port number			*/
237   struct in_addr	sin_addr;	/* Internet address		*/
238 
239   /* Pad to size of `struct sockaddr'. */
240   unsigned char		__pad[__SOCK_SIZE__ - sizeof(short int) -
241 			sizeof(unsigned short int) - sizeof(struct in_addr)];
242 };
243 #define sin_zero	__pad		/* for BSD UNIX comp. -FvK	*/
244 #endif
245 
246 #if __UAPI_DEF_IN_CLASS
247 /*
248  * Definitions of the bits in an Internet address integer.
249  * On subnets, host and network parts are found according
250  * to the subnet mask, not these masks.
251  */
252 #define	IN_CLASSA(a)		((((long int) (a)) & 0x80000000) == 0)
253 #define	IN_CLASSA_NET		0xff000000
254 #define	IN_CLASSA_NSHIFT	24
255 #define	IN_CLASSA_HOST		(0xffffffff & ~IN_CLASSA_NET)
256 #define	IN_CLASSA_MAX		128
257 
258 #define	IN_CLASSB(a)		((((long int) (a)) & 0xc0000000) == 0x80000000)
259 #define	IN_CLASSB_NET		0xffff0000
260 #define	IN_CLASSB_NSHIFT	16
261 #define	IN_CLASSB_HOST		(0xffffffff & ~IN_CLASSB_NET)
262 #define	IN_CLASSB_MAX		65536
263 
264 #define	IN_CLASSC(a)		((((long int) (a)) & 0xe0000000) == 0xc0000000)
265 #define	IN_CLASSC_NET		0xffffff00
266 #define	IN_CLASSC_NSHIFT	8
267 #define	IN_CLASSC_HOST		(0xffffffff & ~IN_CLASSC_NET)
268 
269 #define	IN_CLASSD(a)		((((long int) (a)) & 0xf0000000) == 0xe0000000)
270 #define	IN_MULTICAST(a)		IN_CLASSD(a)
271 #define IN_MULTICAST_NET	0xF0000000
272 
273 #define	IN_EXPERIMENTAL(a)	((((long int) (a)) & 0xf0000000) == 0xf0000000)
274 #define	IN_BADCLASS(a)		IN_EXPERIMENTAL((a))
275 
276 /* Address to accept any incoming messages. */
277 #define	INADDR_ANY		((unsigned long int) 0x00000000)
278 
279 /* Address to send to all hosts. */
280 #define	INADDR_BROADCAST	((unsigned long int) 0xffffffff)
281 
282 /* Address indicating an error return. */
283 #define	INADDR_NONE		((unsigned long int) 0xffffffff)
284 
285 /* Dummy address for src of ICMP replies if no real address is set (RFC7600). */
286 #define	INADDR_DUMMY		((unsigned long int) 0xc0000008)
287 
288 /* Network number for local host loopback. */
289 #define	IN_LOOPBACKNET		127
290 
291 /* Address to loopback in software to local host.  */
292 #define	INADDR_LOOPBACK		0x7f000001	/* 127.0.0.1   */
293 #define	IN_LOOPBACK(a)		((((long int) (a)) & 0xff000000) == 0x7f000000)
294 
295 /* Defines for Multicast INADDR */
296 #define INADDR_UNSPEC_GROUP   	0xe0000000U	/* 224.0.0.0   */
297 #define INADDR_ALLHOSTS_GROUP 	0xe0000001U	/* 224.0.0.1   */
298 #define INADDR_ALLRTRS_GROUP    0xe0000002U	/* 224.0.0.2 */
299 #define INADDR_MAX_LOCAL_GROUP  0xe00000ffU	/* 224.0.0.255 */
300 #endif
301 
302 /* <asm/byteorder.h> contains the htonl type stuff.. */
303 #include <asm/byteorder.h>
304 
305 
306 #endif /* _UAPI_LINUX_IN_H */
307