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001: /*
002:  *      Types and definitions for AF_INET6 
003:  *      Linux INET6 implementation 
004:  *
005:  *      Authors:
006:  *      Pedro Roque             <roque@di.fc.ul.pt>     
007:  *
008:  *      Sources:
009:  *      IPv6 Program Interfaces for BSD Systems
010:  *      <draft-ietf-ipngwg-bsd-api-05.txt>
011:  *
012:  *      Advanced Sockets API for IPv6
013:  *      <draft-stevens-advanced-api-00.txt>
014:  *
015:  *      This program is free software; you can redistribute it and/or
016:  *      modify it under the terms of the GNU General Public License
017:  *      as published by the Free Software Foundation; either version
018:  *      2 of the License, or (at your option) any later version.
019:  */
020: 
021: #ifndef _LINUX_IN6_H
022: #define _LINUX_IN6_H
023: 
024: #include <linux/types.h>
025: 
026: /*
027:  *      IPv6 address structure
028:  */
029: 
030: struct in6_addr {
031:         union {
032:                 __u8            u6_addr8[16];
033:                 __be16          u6_addr16[8];
034:                 __be32          u6_addr32[4];
035:         } in6_u;
036: #define s6_addr                 in6_u.u6_addr8
037: #define s6_addr16               in6_u.u6_addr16
038: #define s6_addr32               in6_u.u6_addr32
039: };
040: 
041: /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
042:  * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
043:  * in network byte order, not in host byte order as are the IPv4 equivalents
044:  */
045: 
046: struct sockaddr_in6 {
047:         unsigned short int      sin6_family;    /* AF_INET6 */
048:         __be16                  sin6_port;      /* Transport layer port # */
049:         __be32                  sin6_flowinfo;  /* IPv6 flow information */
050:         struct in6_addr         sin6_addr;      /* IPv6 address */
051:         __u32                   sin6_scope_id;  /* scope id (new in RFC2553) */
052: };
053: 
054: struct ipv6_mreq {
055:         /* IPv6 multicast address of group */
056:         struct in6_addr ipv6mr_multiaddr;
057: 
058:         /* local IPv6 address of interface */
059:         int             ipv6mr_ifindex;
060: };
061: 
062: #define ipv6mr_acaddr   ipv6mr_multiaddr
063: 
064: struct in6_flowlabel_req {
065:         struct in6_addr flr_dst;
066:         __be32  flr_label;
067:         __u8    flr_action;
068:         __u8    flr_share;
069:         __u16   flr_flags;
070:         __u16   flr_expires;
071:         __u16   flr_linger;
072:         __u32   __flr_pad;
073:         /* Options in format of IPV6_PKTOPTIONS */
074: };
075: 
076: #define IPV6_FL_A_GET   0
077: #define IPV6_FL_A_PUT   1
078: #define IPV6_FL_A_RENEW 2
079: 
080: #define IPV6_FL_F_CREATE        1
081: #define IPV6_FL_F_EXCL          2
082: 
083: #define IPV6_FL_S_NONE          0
084: #define IPV6_FL_S_EXCL          1
085: #define IPV6_FL_S_PROCESS       2
086: #define IPV6_FL_S_USER          3
087: #define IPV6_FL_S_ANY           255
088: 
089: 
090: /*
091:  *      Bitmask constant declarations to help applications select out the 
092:  *      flow label and priority fields.
093:  *
094:  *      Note that this are in host byte order while the flowinfo field of
095:  *      sockaddr_in6 is in network byte order.
096:  */
097: 
098: #define IPV6_FLOWINFO_FLOWLABEL         0x000fffff
099: #define IPV6_FLOWINFO_PRIORITY          0x0ff00000
100: 
101: /* These definitions are obsolete */
102: #define IPV6_PRIORITY_UNCHARACTERIZED   0x0000
103: #define IPV6_PRIORITY_FILLER            0x0100
104: #define IPV6_PRIORITY_UNATTENDED        0x0200
105: #define IPV6_PRIORITY_RESERVED1         0x0300
106: #define IPV6_PRIORITY_BULK              0x0400
107: #define IPV6_PRIORITY_RESERVED2         0x0500
108: #define IPV6_PRIORITY_INTERACTIVE       0x0600
109: #define IPV6_PRIORITY_CONTROL           0x0700
110: #define IPV6_PRIORITY_8                 0x0800
111: #define IPV6_PRIORITY_9                 0x0900
112: #define IPV6_PRIORITY_10                0x0a00
113: #define IPV6_PRIORITY_11                0x0b00
114: #define IPV6_PRIORITY_12                0x0c00
115: #define IPV6_PRIORITY_13                0x0d00
116: #define IPV6_PRIORITY_14                0x0e00
117: #define IPV6_PRIORITY_15                0x0f00
118: 
119: /*
120:  *      IPV6 extension headers
121:  */
122: #define IPPROTO_HOPOPTS         0       /* IPv6 hop-by-hop options      */
123: #define IPPROTO_ROUTING         43      /* IPv6 routing header          */
124: #define IPPROTO_FRAGMENT        44      /* IPv6 fragmentation header    */
125: #define IPPROTO_ICMPV6          58      /* ICMPv6                       */
126: #define IPPROTO_NONE            59      /* IPv6 no next header          */
127: #define IPPROTO_DSTOPTS         60      /* IPv6 destination options     */
128: #define IPPROTO_MH              135     /* IPv6 mobility header         */
129: 
130: /*
131:  *      IPv6 TLV options.
132:  */
133: #define IPV6_TLV_PAD0           0
134: #define IPV6_TLV_PADN           1
135: #define IPV6_TLV_ROUTERALERT    5
136: #define IPV6_TLV_JUMBO          194
137: #define IPV6_TLV_HAO            201     /* home address option */
138: 
139: /*
140:  *      IPV6 socket options
141:  */
142: 
143: #define IPV6_ADDRFORM           1
144: #define IPV6_2292PKTINFO        2
145: #define IPV6_2292HOPOPTS        3
146: #define IPV6_2292DSTOPTS        4
147: #define IPV6_2292RTHDR          5
148: #define IPV6_2292PKTOPTIONS     6
149: #define IPV6_CHECKSUM           7
150: #define IPV6_2292HOPLIMIT       8
151: #define IPV6_NEXTHOP            9
152: #define IPV6_AUTHHDR            10      /* obsolete */
153: #define IPV6_FLOWINFO           11
154: 
155: #define IPV6_UNICAST_HOPS       16
156: #define IPV6_MULTICAST_IF       17
157: #define IPV6_MULTICAST_HOPS     18
158: #define IPV6_MULTICAST_LOOP     19
159: #define IPV6_ADD_MEMBERSHIP     20
160: #define IPV6_DROP_MEMBERSHIP    21
161: #define IPV6_ROUTER_ALERT       22
162: #define IPV6_MTU_DISCOVER       23
163: #define IPV6_MTU                24
164: #define IPV6_RECVERR            25
165: #define IPV6_V6ONLY             26
166: #define IPV6_JOIN_ANYCAST       27
167: #define IPV6_LEAVE_ANYCAST      28
168: 
169: /* IPV6_MTU_DISCOVER values */
170: #define IPV6_PMTUDISC_DONT              0
171: #define IPV6_PMTUDISC_WANT              1
172: #define IPV6_PMTUDISC_DO                2
173: #define IPV6_PMTUDISC_PROBE             3
174: 
175: /* Flowlabel */
176: #define IPV6_FLOWLABEL_MGR      32
177: #define IPV6_FLOWINFO_SEND      33
178: 
179: #define IPV6_IPSEC_POLICY       34
180: #define IPV6_XFRM_POLICY        35
181: 
182: /*
183:  * Multicast:
184:  * Following socket options are shared between IPv4 and IPv6.
185:  *
186:  * MCAST_JOIN_GROUP             42
187:  * MCAST_BLOCK_SOURCE           43
188:  * MCAST_UNBLOCK_SOURCE         44
189:  * MCAST_LEAVE_GROUP            45
190:  * MCAST_JOIN_SOURCE_GROUP      46
191:  * MCAST_LEAVE_SOURCE_GROUP     47
192:  * MCAST_MSFILTER               48
193:  */
194: 
195: /*
196:  * Advanced API (RFC3542) (1)
197:  *
198:  * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
199:  */
200: 
201: #define IPV6_RECVPKTINFO        49
202: #define IPV6_PKTINFO            50
203: #define IPV6_RECVHOPLIMIT       51
204: #define IPV6_HOPLIMIT           52
205: #define IPV6_RECVHOPOPTS        53
206: #define IPV6_HOPOPTS            54
207: #define IPV6_RTHDRDSTOPTS       55
208: #define IPV6_RECVRTHDR          56
209: #define IPV6_RTHDR              57
210: #define IPV6_RECVDSTOPTS        58
211: #define IPV6_DSTOPTS            59
212: #define IPV6_RECVPATHMTU        60
213: #define IPV6_PATHMTU            61
214: #define IPV6_DONTFRAG           62
215: #if 0   /* not yet */
216: #define IPV6_USE_MIN_MTU        63
217: #endif
218: 
219: /*
220:  * Netfilter (1)
221:  *
222:  * Following socket options are used in ip6_tables;
223:  * see include/linux/netfilter_ipv6/ip6_tables.h.
224:  *
225:  * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO               64
226:  * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES       65
227:  */
228: 
229: /*
230:  * Advanced API (RFC3542) (2)
231:  */
232: #define IPV6_RECVTCLASS         66
233: #define IPV6_TCLASS             67
234: 
235: /*
236:  * Netfilter (2)
237:  *
238:  * Following socket options are used in ip6_tables;
239:  * see include/linux/netfilter_ipv6/ip6_tables.h.
240:  *
241:  * IP6T_SO_GET_REVISION_MATCH   68
242:  * IP6T_SO_GET_REVISION_TARGET  69
243:  */
244: 
245: /* RFC5014: Source address selection */
246: #define IPV6_ADDR_PREFERENCES   72
247: 
248: #define IPV6_PREFER_SRC_TMP             0x0001
249: #define IPV6_PREFER_SRC_PUBLIC          0x0002
250: #define IPV6_PREFER_SRC_PUBTMP_DEFAULT  0x0100
251: #define IPV6_PREFER_SRC_COA             0x0004
252: #define IPV6_PREFER_SRC_HOME            0x0400
253: #define IPV6_PREFER_SRC_CGA             0x0008
254: #define IPV6_PREFER_SRC_NONCGA          0x0800
255: 
256: /* RFC5082: Generalized Ttl Security Mechanism */
257: #define IPV6_MINHOPCOUNT                73
258: 
259: #define IPV6_ORIGDSTADDR        74
260: #define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
261: #define IPV6_TRANSPARENT        75
262: 
263: /*
264:  * Multicast Routing:
265:  * see include/linux/mroute6.h.
266:  *
267:  * MRT6_INIT                    200
268:  * MRT6_DONE                    201
269:  * MRT6_ADD_MIF                 202
270:  * MRT6_DEL_MIF                 203
271:  * MRT6_ADD_MFC                 204
272:  * MRT6_DEL_MFC                 205
273:  * MRT6_VERSION                 206
274:  * MRT6_ASSERT                  207
275:  * MRT6_PIM                     208
276:  * (reserved)                   209
277:  */
278: #endif
279: 

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