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TOMOYO Linux Cross Reference
Linux/include/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 _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.  */
 25 enum {
 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_RSVP = 46,            /* RSVP protocol                        */
 36   IPPROTO_GRE = 47,             /* Cisco GRE tunnels (rfc 1701,1702)    */
 37 
 38   IPPROTO_IPV6   = 41,          /* IPv6-in-IPv4 tunnelling              */
 39 
 40   IPPROTO_ESP = 50,            /* Encapsulation Security Payload protocol */
 41   IPPROTO_AH = 51,             /* Authentication Header protocol       */
 42   IPPROTO_PIM    = 103,         /* Protocol Independent Multicast       */
 43 
 44   IPPROTO_COMP   = 108,                /* Compression Header protocol */
 45   IPPROTO_SCTP   = 132,         /* Stream Control Transport Protocol    */
 46 
 47   IPPROTO_RAW    = 255,         /* Raw IP packets                       */
 48   IPPROTO_MAX
 49 };
 50 
 51 
 52 /* Internet address. */
 53 struct in_addr {
 54         __u32   s_addr;
 55 };
 56 
 57 #define IP_TOS          1
 58 #define IP_TTL          2
 59 #define IP_HDRINCL      3
 60 #define IP_OPTIONS      4
 61 #define IP_ROUTER_ALERT 5
 62 #define IP_RECVOPTS     6
 63 #define IP_RETOPTS      7
 64 #define IP_PKTINFO      8
 65 #define IP_PKTOPTIONS   9
 66 #define IP_MTU_DISCOVER 10
 67 #define IP_RECVERR      11
 68 #define IP_RECVTTL      12
 69 #define IP_RECVTOS      13
 70 #define IP_MTU          14
 71 #define IP_FREEBIND     15
 72 #define IP_IPSEC_POLICY 16
 73 #define IP_XFRM_POLICY  17
 74 
 75 /* BSD compatibility */
 76 #define IP_RECVRETOPTS  IP_RETOPTS
 77 
 78 /* IP_MTU_DISCOVER values */
 79 #define IP_PMTUDISC_DONT                0       /* Never send DF frames */
 80 #define IP_PMTUDISC_WANT                1       /* Use per route hints  */
 81 #define IP_PMTUDISC_DO                  2       /* Always DF            */
 82 
 83 #define IP_MULTICAST_IF                 32
 84 #define IP_MULTICAST_TTL                33
 85 #define IP_MULTICAST_LOOP               34
 86 #define IP_ADD_MEMBERSHIP               35
 87 #define IP_DROP_MEMBERSHIP              36
 88 #define IP_UNBLOCK_SOURCE               37
 89 #define IP_BLOCK_SOURCE                 38
 90 #define IP_ADD_SOURCE_MEMBERSHIP        39
 91 #define IP_DROP_SOURCE_MEMBERSHIP       40
 92 #define IP_MSFILTER                     41
 93 #define MCAST_JOIN_GROUP                42
 94 #define MCAST_BLOCK_SOURCE              43
 95 #define MCAST_UNBLOCK_SOURCE            44
 96 #define MCAST_LEAVE_GROUP               45
 97 #define MCAST_JOIN_SOURCE_GROUP         46
 98 #define MCAST_LEAVE_SOURCE_GROUP        47
 99 #define MCAST_MSFILTER                  48
100 
101 #define MCAST_EXCLUDE   0
102 #define MCAST_INCLUDE   1
103 
104 /* These need to appear somewhere around here */
105 #define IP_DEFAULT_MULTICAST_TTL        1
106 #define IP_DEFAULT_MULTICAST_LOOP       1
107 
108 /* Request struct for multicast socket ops */
109 
110 struct ip_mreq 
111 {
112         struct in_addr imr_multiaddr;   /* IP multicast address of group */
113         struct in_addr imr_interface;   /* local IP address of interface */
114 };
115 
116 struct ip_mreqn
117 {
118         struct in_addr  imr_multiaddr;          /* IP multicast address of group */
119         struct in_addr  imr_address;            /* local IP address of interface */
120         int             imr_ifindex;            /* Interface index */
121 };
122 
123 struct ip_mreq_source {
124         __u32           imr_multiaddr;
125         __u32           imr_interface;
126         __u32           imr_sourceaddr;
127 };
128 
129 struct ip_msfilter {
130         __u32           imsf_multiaddr;
131         __u32           imsf_interface;
132         __u32           imsf_fmode;
133         __u32           imsf_numsrc;
134         __u32           imsf_slist[1];
135 };
136 
137 #define IP_MSFILTER_SIZE(numsrc) \
138         (sizeof(struct ip_msfilter) - sizeof(__u32) \
139         + (numsrc) * sizeof(__u32))
140 
141 struct group_req
142 {
143         __u32                            gr_interface;  /* interface index */
144         struct __kernel_sockaddr_storage gr_group;      /* group address */
145 };
146 
147 struct group_source_req
148 {
149         __u32                            gsr_interface; /* interface index */
150         struct __kernel_sockaddr_storage gsr_group;     /* group address */
151         struct __kernel_sockaddr_storage gsr_source;    /* source address */
152 };
153 
154 struct group_filter
155 {
156         __u32                            gf_interface;  /* interface index */
157         struct __kernel_sockaddr_storage gf_group;      /* multicast address */
158         __u32                            gf_fmode;      /* filter mode */
159         __u32                            gf_numsrc;     /* number of sources */
160         struct __kernel_sockaddr_storage gf_slist[1];   /* interface index */
161 };
162 
163 #define GROUP_FILTER_SIZE(numsrc) \
164         (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
165         + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
166 
167 struct in_pktinfo
168 {
169         int             ipi_ifindex;
170         struct in_addr  ipi_spec_dst;
171         struct in_addr  ipi_addr;
172 };
173 
174 /* Structure describing an Internet (IP) socket address. */
175 #define __SOCK_SIZE__   16              /* sizeof(struct sockaddr)      */
176 struct sockaddr_in {
177   sa_family_t           sin_family;     /* Address family               */
178   unsigned short int    sin_port;       /* Port number                  */
179   struct in_addr        sin_addr;       /* Internet address             */
180 
181   /* Pad to size of `struct sockaddr'. */
182   unsigned char         __pad[__SOCK_SIZE__ - sizeof(short int) -
183                         sizeof(unsigned short int) - sizeof(struct in_addr)];
184 };
185 #define sin_zero        __pad           /* for BSD UNIX comp. -FvK      */
186 
187 
188 /*
189  * Definitions of the bits in an Internet address integer.
190  * On subnets, host and network parts are found according
191  * to the subnet mask, not these masks.
192  */
193 #define IN_CLASSA(a)            ((((long int) (a)) & 0x80000000) == 0)
194 #define IN_CLASSA_NET           0xff000000
195 #define IN_CLASSA_NSHIFT        24
196 #define IN_CLASSA_HOST          (0xffffffff & ~IN_CLASSA_NET)
197 #define IN_CLASSA_MAX           128
198 
199 #define IN_CLASSB(a)            ((((long int) (a)) & 0xc0000000) == 0x80000000)
200 #define IN_CLASSB_NET           0xffff0000
201 #define IN_CLASSB_NSHIFT        16
202 #define IN_CLASSB_HOST          (0xffffffff & ~IN_CLASSB_NET)
203 #define IN_CLASSB_MAX           65536
204 
205 #define IN_CLASSC(a)            ((((long int) (a)) & 0xe0000000) == 0xc0000000)
206 #define IN_CLASSC_NET           0xffffff00
207 #define IN_CLASSC_NSHIFT        8
208 #define IN_CLASSC_HOST          (0xffffffff & ~IN_CLASSC_NET)
209 
210 #define IN_CLASSD(a)            ((((long int) (a)) & 0xf0000000) == 0xe0000000)
211 #define IN_MULTICAST(a)         IN_CLASSD(a)
212 #define IN_MULTICAST_NET        0xF0000000
213 
214 #define IN_EXPERIMENTAL(a)      ((((long int) (a)) & 0xf0000000) == 0xf0000000)
215 #define IN_BADCLASS(a)          IN_EXPERIMENTAL((a))
216 
217 /* Address to accept any incoming messages. */
218 #define INADDR_ANY              ((unsigned long int) 0x00000000)
219 
220 /* Address to send to all hosts. */
221 #define INADDR_BROADCAST        ((unsigned long int) 0xffffffff)
222 
223 /* Address indicating an error return. */
224 #define INADDR_NONE             ((unsigned long int) 0xffffffff)
225 
226 /* Network number for local host loopback. */
227 #define IN_LOOPBACKNET          127
228 
229 /* Address to loopback in software to local host.  */
230 #define INADDR_LOOPBACK         0x7f000001      /* 127.0.0.1   */
231 #define IN_LOOPBACK(a)          ((((long int) (a)) & 0xff000000) == 0x7f000000)
232 
233 /* Defines for Multicast INADDR */
234 #define INADDR_UNSPEC_GROUP     0xe0000000U     /* 224.0.0.0   */
235 #define INADDR_ALLHOSTS_GROUP   0xe0000001U     /* 224.0.0.1   */
236 #define INADDR_ALLRTRS_GROUP    0xe0000002U     /* 224.0.0.2 */
237 #define INADDR_MAX_LOCAL_GROUP  0xe00000ffU     /* 224.0.0.255 */
238 
239 
240 /* <asm/byteorder.h> contains the htonl type stuff.. */
241 #include <asm/byteorder.h> 
242 
243 #ifdef __KERNEL__
244 /* Some random defines to make it easier in the kernel.. */
245 #define LOOPBACK(x)     (((x) & htonl(0xff000000)) == htonl(0x7f000000))
246 #define MULTICAST(x)    (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
247 #define BADCLASS(x)     (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
248 #define ZERONET(x)      (((x) & htonl(0xff000000)) == htonl(0x00000000))
249 #define LOCAL_MCAST(x)  (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
250 
251 #endif
252 
253 #endif  /* _LINUX_IN_H */
254 

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