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1/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _LINUX_IN_H
15#define _LINUX_IN_H
16
17
18#include <linux/errno.h>
19#include <uapi/linux/in.h>
20
21static inline int proto_ports_offset(int proto)
22{
23 switch (proto) {
24 case IPPROTO_TCP:
25 case IPPROTO_UDP:
26 case IPPROTO_DCCP:
27 case IPPROTO_ESP: /* SPI */
28 case IPPROTO_SCTP:
29 case IPPROTO_UDPLITE:
30 return 0;
31 case IPPROTO_AH: /* SPI */
32 return 4;
33 default:
34 return -EINVAL;
35 }
36}
37
38static inline bool ipv4_is_loopback(__be32 addr)
39{
40 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
41}
42
43static inline bool ipv4_is_multicast(__be32 addr)
44{
45 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
46}
47
48static inline bool ipv4_is_local_multicast(__be32 addr)
49{
50 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
51}
52
53static inline bool ipv4_is_lbcast(__be32 addr)
54{
55 /* limited broadcast */
56 return addr == htonl(INADDR_BROADCAST);
57}
58
59static inline bool ipv4_is_all_snoopers(__be32 addr)
60{
61 return addr == htonl(INADDR_ALLSNOOPERS_GROUP);
62}
63
64static inline bool ipv4_is_zeronet(__be32 addr)
65{
66 return (addr == 0);
67}
68
69/* Special-Use IPv4 Addresses (RFC3330) */
70
71static inline bool ipv4_is_private_10(__be32 addr)
72{
73 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
74}
75
76static inline bool ipv4_is_private_172(__be32 addr)
77{
78 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
79}
80
81static inline bool ipv4_is_private_192(__be32 addr)
82{
83 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
84}
85
86static inline bool ipv4_is_linklocal_169(__be32 addr)
87{
88 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
89}
90
91static inline bool ipv4_is_anycast_6to4(__be32 addr)
92{
93 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
94}
95
96static inline bool ipv4_is_test_192(__be32 addr)
97{
98 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
99}
100
101static inline bool ipv4_is_test_198(__be32 addr)
102{
103 return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
104}
105#endif /* _LINUX_IN_H */
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/socket.h>
23
24/* Standard well-defined IP protocols. */
25enum {
26 IPPROTO_IP = 0, /* Dummy protocol for TCP */
27 IPPROTO_ICMP = 1, /* Internet Control Message Protocol */
28 IPPROTO_IGMP = 2, /* Internet Group Management Protocol */
29 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
30 IPPROTO_TCP = 6, /* Transmission Control Protocol */
31 IPPROTO_EGP = 8, /* Exterior Gateway Protocol */
32 IPPROTO_PUP = 12, /* PUP protocol */
33 IPPROTO_UDP = 17, /* User Datagram Protocol */
34 IPPROTO_IDP = 22, /* XNS IDP protocol */
35 IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */
36 IPPROTO_RSVP = 46, /* RSVP protocol */
37 IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
38
39 IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
40
41 IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
42 IPPROTO_AH = 51, /* Authentication Header protocol */
43 IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */
44 IPPROTO_PIM = 103, /* Protocol Independent Multicast */
45
46 IPPROTO_COMP = 108, /* Compression Header protocol */
47 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
48 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
49
50 IPPROTO_RAW = 255, /* Raw IP packets */
51 IPPROTO_MAX
52};
53
54
55/* Internet address. */
56struct in_addr {
57 __be32 s_addr;
58};
59
60#define IP_TOS 1
61#define IP_TTL 2
62#define IP_HDRINCL 3
63#define IP_OPTIONS 4
64#define IP_ROUTER_ALERT 5
65#define IP_RECVOPTS 6
66#define IP_RETOPTS 7
67#define IP_PKTINFO 8
68#define IP_PKTOPTIONS 9
69#define IP_MTU_DISCOVER 10
70#define IP_RECVERR 11
71#define IP_RECVTTL 12
72#define IP_RECVTOS 13
73#define IP_MTU 14
74#define IP_FREEBIND 15
75#define IP_IPSEC_POLICY 16
76#define IP_XFRM_POLICY 17
77#define IP_PASSSEC 18
78#define IP_TRANSPARENT 19
79
80/* BSD compatibility */
81#define IP_RECVRETOPTS IP_RETOPTS
82
83/* TProxy original addresses */
84#define IP_ORIGDSTADDR 20
85#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
86
87#define IP_MINTTL 21
88#define IP_NODEFRAG 22
89
90/* IP_MTU_DISCOVER values */
91#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
92#define IP_PMTUDISC_WANT 1 /* Use per route hints */
93#define IP_PMTUDISC_DO 2 /* Always DF */
94#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
95
96#define IP_MULTICAST_IF 32
97#define IP_MULTICAST_TTL 33
98#define IP_MULTICAST_LOOP 34
99#define IP_ADD_MEMBERSHIP 35
100#define IP_DROP_MEMBERSHIP 36
101#define IP_UNBLOCK_SOURCE 37
102#define IP_BLOCK_SOURCE 38
103#define IP_ADD_SOURCE_MEMBERSHIP 39
104#define IP_DROP_SOURCE_MEMBERSHIP 40
105#define IP_MSFILTER 41
106#define MCAST_JOIN_GROUP 42
107#define MCAST_BLOCK_SOURCE 43
108#define MCAST_UNBLOCK_SOURCE 44
109#define MCAST_LEAVE_GROUP 45
110#define MCAST_JOIN_SOURCE_GROUP 46
111#define MCAST_LEAVE_SOURCE_GROUP 47
112#define MCAST_MSFILTER 48
113#define IP_MULTICAST_ALL 49
114
115#define MCAST_EXCLUDE 0
116#define MCAST_INCLUDE 1
117
118/* These need to appear somewhere around here */
119#define IP_DEFAULT_MULTICAST_TTL 1
120#define IP_DEFAULT_MULTICAST_LOOP 1
121
122/* Request struct for multicast socket ops */
123
124struct ip_mreq {
125 struct in_addr imr_multiaddr; /* IP multicast address of group */
126 struct in_addr imr_interface; /* local IP address of interface */
127};
128
129struct ip_mreqn {
130 struct in_addr imr_multiaddr; /* IP multicast address of group */
131 struct in_addr imr_address; /* local IP address of interface */
132 int imr_ifindex; /* Interface index */
133};
134
135struct ip_mreq_source {
136 __be32 imr_multiaddr;
137 __be32 imr_interface;
138 __be32 imr_sourceaddr;
139};
140
141struct ip_msfilter {
142 __be32 imsf_multiaddr;
143 __be32 imsf_interface;
144 __u32 imsf_fmode;
145 __u32 imsf_numsrc;
146 __be32 imsf_slist[1];
147};
148
149#define IP_MSFILTER_SIZE(numsrc) \
150 (sizeof(struct ip_msfilter) - sizeof(__u32) \
151 + (numsrc) * sizeof(__u32))
152
153struct group_req {
154 __u32 gr_interface; /* interface index */
155 struct __kernel_sockaddr_storage gr_group; /* group address */
156};
157
158struct group_source_req {
159 __u32 gsr_interface; /* interface index */
160 struct __kernel_sockaddr_storage gsr_group; /* group address */
161 struct __kernel_sockaddr_storage gsr_source; /* source address */
162};
163
164struct group_filter {
165 __u32 gf_interface; /* interface index */
166 struct __kernel_sockaddr_storage gf_group; /* multicast address */
167 __u32 gf_fmode; /* filter mode */
168 __u32 gf_numsrc; /* number of sources */
169 struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
170};
171
172#define GROUP_FILTER_SIZE(numsrc) \
173 (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
174 + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
175
176struct in_pktinfo {
177 int ipi_ifindex;
178 struct in_addr ipi_spec_dst;
179 struct in_addr ipi_addr;
180};
181
182/* Structure describing an Internet (IP) socket address. */
183#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
184struct sockaddr_in {
185 sa_family_t sin_family; /* Address family */
186 __be16 sin_port; /* Port number */
187 struct in_addr sin_addr; /* Internet address */
188
189 /* Pad to size of `struct sockaddr'. */
190 unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
191 sizeof(unsigned short int) - sizeof(struct in_addr)];
192};
193#define sin_zero __pad /* for BSD UNIX comp. -FvK */
194
195
196/*
197 * Definitions of the bits in an Internet address integer.
198 * On subnets, host and network parts are found according
199 * to the subnet mask, not these masks.
200 */
201#define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
202#define IN_CLASSA_NET 0xff000000
203#define IN_CLASSA_NSHIFT 24
204#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
205#define IN_CLASSA_MAX 128
206
207#define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
208#define IN_CLASSB_NET 0xffff0000
209#define IN_CLASSB_NSHIFT 16
210#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
211#define IN_CLASSB_MAX 65536
212
213#define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
214#define IN_CLASSC_NET 0xffffff00
215#define IN_CLASSC_NSHIFT 8
216#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
217
218#define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
219#define IN_MULTICAST(a) IN_CLASSD(a)
220#define IN_MULTICAST_NET 0xF0000000
221
222#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
223#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
224
225/* Address to accept any incoming messages. */
226#define INADDR_ANY ((unsigned long int) 0x00000000)
227
228/* Address to send to all hosts. */
229#define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
230
231/* Address indicating an error return. */
232#define INADDR_NONE ((unsigned long int) 0xffffffff)
233
234/* Network number for local host loopback. */
235#define IN_LOOPBACKNET 127
236
237/* Address to loopback in software to local host. */
238#define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
239#define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
240
241/* Defines for Multicast INADDR */
242#define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
243#define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
244#define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
245#define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
246
247
248/* <asm/byteorder.h> contains the htonl type stuff.. */
249#include <asm/byteorder.h>
250
251#ifdef __KERNEL__
252
253#include <linux/errno.h>
254
255static inline int proto_ports_offset(int proto)
256{
257 switch (proto) {
258 case IPPROTO_TCP:
259 case IPPROTO_UDP:
260 case IPPROTO_DCCP:
261 case IPPROTO_ESP: /* SPI */
262 case IPPROTO_SCTP:
263 case IPPROTO_UDPLITE:
264 return 0;
265 case IPPROTO_AH: /* SPI */
266 return 4;
267 default:
268 return -EINVAL;
269 }
270}
271
272static inline bool ipv4_is_loopback(__be32 addr)
273{
274 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
275}
276
277static inline bool ipv4_is_multicast(__be32 addr)
278{
279 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
280}
281
282static inline bool ipv4_is_local_multicast(__be32 addr)
283{
284 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
285}
286
287static inline bool ipv4_is_lbcast(__be32 addr)
288{
289 /* limited broadcast */
290 return addr == htonl(INADDR_BROADCAST);
291}
292
293static inline bool ipv4_is_zeronet(__be32 addr)
294{
295 return (addr & htonl(0xff000000)) == htonl(0x00000000);
296}
297
298/* Special-Use IPv4 Addresses (RFC3330) */
299
300static inline bool ipv4_is_private_10(__be32 addr)
301{
302 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
303}
304
305static inline bool ipv4_is_private_172(__be32 addr)
306{
307 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
308}
309
310static inline bool ipv4_is_private_192(__be32 addr)
311{
312 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
313}
314
315static inline bool ipv4_is_linklocal_169(__be32 addr)
316{
317 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
318}
319
320static inline bool ipv4_is_anycast_6to4(__be32 addr)
321{
322 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
323}
324
325static inline bool ipv4_is_test_192(__be32 addr)
326{
327 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
328}
329
330static inline bool ipv4_is_test_198(__be32 addr)
331{
332 return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
333}
334#endif
335
336#endif /* _LINUX_IN_H */