glibc (2.38)
1 /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 /* Linux version. */
19
20 #ifndef _NETINET_IN_H
21 # error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
22 #endif
23
24 /* If the application has already included linux/in6.h from a linux-based
25 kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the
26 defines), sockaddr_in6, or ipv6_mreq. Same for in6_ptkinfo or ip6_mtuinfo
27 in linux/ipv6.h. The ABI used by the linux-kernel and glibc match exactly.
28 Neither the linux kernel nor glibc should break this ABI without coordination.
29 In upstream kernel 56c176c9 the _UAPI prefix was stripped so we need to check
30 for _LINUX_IN6_H and _IPV6_H now, and keep checking the old versions for
31 maximum backwards compatibility. */
32 #if defined _UAPI_LINUX_IN6_H \
33 || defined _UAPI_IPV6_H \
34 || defined _LINUX_IN6_H \
35 || defined _IPV6_H
36 /* This is not quite the same API since the kernel always defines s6_addr16 and
37 s6_addr32. This is not a violation of POSIX since POSIX says "at least the
38 following member" and that holds true. */
39 # define __USE_KERNEL_IPV6_DEFS 1
40 #else
41 # define __USE_KERNEL_IPV6_DEFS 0
42 #endif
43
44 /* Options for use with `getsockopt' and `setsockopt' at the IP level.
45 The first word in the comment at the right is the data type used;
46 "bool" means a boolean value stored in an `int'. */
47 #define IP_OPTIONS 4 /* ip_opts; IP per-packet options. */
48 #define IP_HDRINCL 3 /* int; Header is included with data. */
49 #define IP_TOS 1 /* int; IP type of service and precedence. */
50 #define IP_TTL 2 /* int; IP time to live. */
51 #define IP_RECVOPTS 6 /* bool; Receive all IP options w/datagram. */
52 /* For BSD compatibility. */
53 #define IP_RECVRETOPTS IP_RETOPTS /* bool; Receive IP options for response. */
54 #define IP_RETOPTS 7 /* ip_opts; Set/get IP per-packet options. */
55 #define IP_MULTICAST_IF 32 /* in_addr; set/get IP multicast i/f */
56 #define IP_MULTICAST_TTL 33 /* unsigned char; set/get IP multicast ttl */
57 #define IP_MULTICAST_LOOP 34 /* bool; set/get IP multicast loopback */
58 #define IP_ADD_MEMBERSHIP 35 /* ip_mreq; add an IP group membership */
59 #define IP_DROP_MEMBERSHIP 36 /* ip_mreq; drop an IP group membership */
60 #define IP_UNBLOCK_SOURCE 37 /* ip_mreq_source: unblock data from source */
61 #define IP_BLOCK_SOURCE 38 /* ip_mreq_source: block data from source */
62 #define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */
63 #define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */
64 #define IP_MSFILTER 41
65 #ifdef __USE_MISC
66 # define MCAST_JOIN_GROUP 42 /* group_req: join any-source group */
67 # define MCAST_BLOCK_SOURCE 43 /* group_source_req: block from given group */
68 # define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/
69 # define MCAST_LEAVE_GROUP 45 /* group_req: leave any-source group */
70 # define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */
71 # define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/
72 # define MCAST_MSFILTER 48
73 # define IP_MULTICAST_ALL 49
74 # define IP_UNICAST_IF 50
75
76 # define MCAST_EXCLUDE 0
77 # define MCAST_INCLUDE 1
78 #endif
79
80 #define IP_ROUTER_ALERT 5 /* bool */
81 #define IP_PKTINFO 8 /* bool */
82 #define IP_PKTOPTIONS 9
83 #define IP_PMTUDISC 10 /* obsolete name? */
84 #define IP_MTU_DISCOVER 10 /* int; see below */
85 #define IP_RECVERR 11 /* bool */
86 #define IP_RECVTTL 12 /* bool */
87 #define IP_RECVTOS 13 /* bool */
88 #define IP_MTU 14 /* int */
89 #define IP_FREEBIND 15
90 #define IP_IPSEC_POLICY 16
91 #define IP_XFRM_POLICY 17
92 #define IP_PASSSEC 18
93 #define IP_TRANSPARENT 19
94 #define IP_MULTICAST_ALL 49 /* bool */
95
96 /* TProxy original addresses */
97 #define IP_ORIGDSTADDR 20
98 #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
99
100 #define IP_MINTTL 21
101 #define IP_NODEFRAG 22
102 #define IP_CHECKSUM 23
103 #define IP_BIND_ADDRESS_NO_PORT 24
104 #define IP_RECVFRAGSIZE 25
105 #define IP_RECVERR_RFC4884 26
106
107 /* IP_MTU_DISCOVER arguments. */
108 #define IP_PMTUDISC_DONT 0 /* Never send DF frames. */
109 #define IP_PMTUDISC_WANT 1 /* Use per route hints. */
110 #define IP_PMTUDISC_DO 2 /* Always DF. */
111 #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */
112 /* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
113 Also incoming ICMP frag_needed notifications will be ignored on
114 this socket to prevent accepting spoofed ones. */
115 #define IP_PMTUDISC_INTERFACE 4
116 /* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented. */
117 #define IP_PMTUDISC_OMIT 5
118
119 #define IP_MULTICAST_IF 32
120 #define IP_MULTICAST_TTL 33
121 #define IP_MULTICAST_LOOP 34
122 #define IP_ADD_MEMBERSHIP 35
123 #define IP_DROP_MEMBERSHIP 36
124 #define IP_UNBLOCK_SOURCE 37
125 #define IP_BLOCK_SOURCE 38
126 #define IP_ADD_SOURCE_MEMBERSHIP 39
127 #define IP_DROP_SOURCE_MEMBERSHIP 40
128 #define IP_MSFILTER 41
129 #define IP_MULTICAST_ALL 49
130 #define IP_UNICAST_IF 50
131 #define IP_LOCAL_PORT_RANGE 51
132
133 /* To select the IP level. */
134 #define SOL_IP 0
135
136 #define IP_DEFAULT_MULTICAST_TTL 1
137 #define IP_DEFAULT_MULTICAST_LOOP 1
138 #define IP_MAX_MEMBERSHIPS 20
139
140 #ifdef __USE_MISC
141 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
142 The `ip_dst' field is used for the first-hop gateway when using a
143 source route (this gets put into the header proper). */
144 struct ip_opts
145 {
146 struct in_addr ip_dst; /* First hop; zero without source route. */
147 char ip_opts[40]; /* Actually variable in size. */
148 };
149
150 /* Structure used for IP_PKTINFO. */
151 struct in_pktinfo
152 {
153 int ipi_ifindex; /* Interface index */
154 struct in_addr ipi_spec_dst; /* Routing destination address */
155 struct in_addr ipi_addr; /* Header destination address */
156 };
157 #endif
158
159 /* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.
160 The first word in the comment at the right is the data type used;
161 "bool" means a boolean value stored in an `int'. */
162 #define IPV6_ADDRFORM 1
163 #define IPV6_2292PKTINFO 2
164 #define IPV6_2292HOPOPTS 3
165 #define IPV6_2292DSTOPTS 4
166 #define IPV6_2292RTHDR 5
167 #define IPV6_2292PKTOPTIONS 6
168 #define IPV6_CHECKSUM 7
169 #define IPV6_2292HOPLIMIT 8
170
171 #define SCM_SRCRT IPV6_RXSRCRT
172
173 #define IPV6_NEXTHOP 9
174 #define IPV6_AUTHHDR 10
175 #define IPV6_UNICAST_HOPS 16
176 #define IPV6_MULTICAST_IF 17
177 #define IPV6_MULTICAST_HOPS 18
178 #define IPV6_MULTICAST_LOOP 19
179 #define IPV6_JOIN_GROUP 20
180 #define IPV6_LEAVE_GROUP 21
181 #define IPV6_ROUTER_ALERT 22
182 #define IPV6_MTU_DISCOVER 23
183 #define IPV6_MTU 24
184 #define IPV6_RECVERR 25
185 #define IPV6_V6ONLY 26
186 #define IPV6_JOIN_ANYCAST 27
187 #define IPV6_LEAVE_ANYCAST 28
188 #define IPV6_MULTICAST_ALL 29
189 #define IPV6_ROUTER_ALERT_ISOLATE 30
190 #define IPV6_RECVERR_RFC4884 31
191 #define IPV6_IPSEC_POLICY 34
192 #define IPV6_XFRM_POLICY 35
193 #define IPV6_HDRINCL 36
194
195 /* Advanced API (RFC3542) (1). */
196 #define IPV6_RECVPKTINFO 49
197 #define IPV6_PKTINFO 50
198 #define IPV6_RECVHOPLIMIT 51
199 #define IPV6_HOPLIMIT 52
200 #define IPV6_RECVHOPOPTS 53
201 #define IPV6_HOPOPTS 54
202 #define IPV6_RTHDRDSTOPTS 55
203 #define IPV6_RECVRTHDR 56
204 #define IPV6_RTHDR 57
205 #define IPV6_RECVDSTOPTS 58
206 #define IPV6_DSTOPTS 59
207 #define IPV6_RECVPATHMTU 60
208 #define IPV6_PATHMTU 61
209 #define IPV6_DONTFRAG 62
210
211 /* Advanced API (RFC3542) (2). */
212 #define IPV6_RECVTCLASS 66
213 #define IPV6_TCLASS 67
214
215 #define IPV6_AUTOFLOWLABEL 70
216
217 /* RFC5014. */
218 #define IPV6_ADDR_PREFERENCES 72
219
220 /* RFC5082. */
221 #define IPV6_MINHOPCOUNT 73
222
223 #define IPV6_ORIGDSTADDR 74
224 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
225 #define IPV6_TRANSPARENT 75
226 #define IPV6_UNICAST_IF 76
227 #define IPV6_RECVFRAGSIZE 77
228 #define IPV6_FREEBIND 78
229
230 /* Obsolete synonyms for the above. */
231 #if !__USE_KERNEL_IPV6_DEFS
232 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
233 # define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
234 #endif
235 #define IPV6_RXHOPOPTS IPV6_HOPOPTS
236 #define IPV6_RXDSTOPTS IPV6_DSTOPTS
237
238 /* IPV6_MTU_DISCOVER values. */
239 #define IPV6_PMTUDISC_DONT 0 /* Never send DF frames. */
240 #define IPV6_PMTUDISC_WANT 1 /* Use per route hints. */
241 #define IPV6_PMTUDISC_DO 2 /* Always DF. */
242 #define IPV6_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */
243 #define IPV6_PMTUDISC_INTERFACE 4 /* See IP_PMTUDISC_INTERFACE. */
244 #define IPV6_PMTUDISC_OMIT 5 /* See IP_PMTUDISC_OMIT. */
245
246 /* Socket level values for IPv6. */
247 #define SOL_IPV6 41
248 #define SOL_ICMPV6 58
249
250 /* Routing header options for IPv6. */
251 #define IPV6_RTHDR_LOOSE 0 /* Hop doesn't need to be neighbour. */
252 #define IPV6_RTHDR_STRICT 1 /* Hop must be a neighbour. */
253
254 #define IPV6_RTHDR_TYPE_0 0 /* IPv6 Routing header type 0. */
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