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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/in.h

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  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 
158 #define MCAST_EXCLUDE   0
159 #define MCAST_INCLUDE   1
160 
161 /* These need to appear somewhere around here */
162 #define IP_DEFAULT_MULTICAST_TTL        1
163 #define IP_DEFAULT_MULTICAST_LOOP       1
164 
165 /* Request struct for multicast socket ops */
166 
167 #if __UAPI_DEF_IP_MREQ
168 struct ip_mreq  {
169         struct in_addr imr_multiaddr;   /* IP multicast address of group */
170         struct in_addr imr_interface;   /* local IP address of interface */
171 };
172 
173 struct ip_mreqn {
174         struct in_addr  imr_multiaddr;          /* IP multicast address of group */
175         struct in_addr  imr_address;            /* local IP address of interface */
176         int             imr_ifindex;            /* Interface index */
177 };
178 
179 struct ip_mreq_source {
180         __be32          imr_multiaddr;
181         __be32          imr_interface;
182         __be32          imr_sourceaddr;
183 };
184 
185 struct ip_msfilter {
186         __be32          imsf_multiaddr;
187         __be32          imsf_interface;
188         __u32           imsf_fmode;
189         __u32           imsf_numsrc;
190         __be32          imsf_slist[1];
191 };
192 
193 #define IP_MSFILTER_SIZE(numsrc) \
194         (sizeof(struct ip_msfilter) - sizeof(__u32) \
195         + (numsrc) * sizeof(__u32))
196 
197 struct group_req {
198         __u32                            gr_interface;  /* interface index */
199         struct __kernel_sockaddr_storage gr_group;      /* group address */
200 };
201 
202 struct group_source_req {
203         __u32                            gsr_interface; /* interface index */
204         struct __kernel_sockaddr_storage gsr_group;     /* group address */
205         struct __kernel_sockaddr_storage gsr_source;    /* source address */
206 };
207 
208 struct group_filter {
209         __u32                            gf_interface;  /* interface index */
210         struct __kernel_sockaddr_storage gf_group;      /* multicast address */
211         __u32                            gf_fmode;      /* filter mode */
212         __u32                            gf_numsrc;     /* number of sources */
213         struct __kernel_sockaddr_storage gf_slist[1];   /* interface index */
214 };
215 
216 #define GROUP_FILTER_SIZE(numsrc) \
217         (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
218         + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
219 #endif
220 
221 #if __UAPI_DEF_IN_PKTINFO
222 struct in_pktinfo {
223         int             ipi_ifindex;
224         struct in_addr  ipi_spec_dst;
225         struct in_addr  ipi_addr;
226 };
227 #endif
228 
229 /* Structure describing an Internet (IP) socket address. */
230 #if  __UAPI_DEF_SOCKADDR_IN
231 #define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
232 struct sockaddr_in {
233   __kernel_sa_family_t  sin_family;     /* Address family               */
234   __be16                sin_port;       /* Port number                  */
235   struct in_addr        sin_addr;       /* Internet address             */
236 
237   /* Pad to size of `struct sockaddr'. */
238   unsigned char         __pad[__SOCK_SIZE__ - sizeof(short int) -
239                         sizeof(unsigned short int) - sizeof(struct in_addr)];
240 };
241 #define sin_zero        __pad           /* for BSD UNIX comp. -FvK      */
242 #endif
243 
244 #if __UAPI_DEF_IN_CLASS
245 /*
246  * Definitions of the bits in an Internet address integer.
247  * On subnets, host and network parts are found according
248  * to the subnet mask, not these masks.
249  */
250 #define IN_CLASSA(a)            ((((long int) (a)) & 0x80000000) == 0)
251 #define IN_CLASSA_NET           0xff000000
252 #define IN_CLASSA_NSHIFT        24
253 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
254 #define IN_CLASSA_MAX           128
255 
256 #define IN_CLASSB(a)            ((((long int) (a)) & 0xc0000000) == 0x80000000)
257 #define IN_CLASSB_NET           0xffff0000
258 #define IN_CLASSB_NSHIFT        16
259 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
260 #define IN_CLASSB_MAX           65536
261 
262 #define IN_CLASSC(a)            ((((long int) (a)) & 0xe0000000) == 0xc0000000)
263 #define IN_CLASSC_NET           0xffffff00
264 #define IN_CLASSC_NSHIFT        8
265 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
266 
267 #define IN_CLASSD(a)            ((((long int) (a)) & 0xf0000000) == 0xe0000000)
268 #define IN_MULTICAST(a)         IN_CLASSD(a)
269 #define IN_MULTICAST_NET        0xF0000000
270 
271 #define IN_EXPERIMENTAL(a)      ((((long int) (a)) & 0xf0000000) == 0xf0000000)
272 #define IN_BADCLASS(a)          IN_EXPERIMENTAL((a))
273 
274 /* Address to accept any incoming messages. */
275 #define INADDR_ANY              ((unsigned long int) 0x00000000)
276 
277 /* Address to send to all hosts. */
278 #define INADDR_BROADCAST        ((unsigned long int) 0xffffffff)
279 
280 /* Address indicating an error return. */
281 #define INADDR_NONE             ((unsigned long int) 0xffffffff)
282 
283 /* Network number for local host loopback. */
284 #define IN_LOOPBACKNET          127
285 
286 /* Address to loopback in software to local host.  */
287 #define INADDR_LOOPBACK         0x7f000001      /* 127.0.0.1   */
288 #define IN_LOOPBACK(a)          ((((long int) (a)) & 0xff000000) == 0x7f000000)
289 
290 /* Defines for Multicast INADDR */
291 #define INADDR_UNSPEC_GROUP     0xe0000000U     /* 224.0.0.0   */
292 #define INADDR_ALLHOSTS_GROUP   0xe0000001U     /* 224.0.0.1   */
293 #define INADDR_ALLRTRS_GROUP    0xe0000002U     /* 224.0.0.2 */
294 #define INADDR_MAX_LOCAL_GROUP  0xe00000ffU     /* 224.0.0.255 */
295 #endif
296 
297 /* <asm/byteorder.h> contains the htonl type stuff.. */
298 #include <asm/byteorder.h> 
299 
300 
301 #endif /* _UAPI_LINUX_IN_H */
302 

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