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Linux/include/uapi/linux/in.h

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

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