1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * dhcpcd - DHCP client daemon 4 * Copyright (c) 2006-2025 Roy Marples <roy (at) marples.name> 5 * All rights reserved 6 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef IPV6_H 30 #define IPV6_H 31 32 #include <sys/uio.h> 33 #include <netinet/in.h> 34 35 #include "config.h" 36 #include "if.h" 37 38 #ifndef __linux__ 39 # if !defined(__QNX__) && !defined(__sun) 40 # include <sys/endian.h> 41 # endif 42 # include <net/if.h> 43 # ifndef __sun 44 # include <netinet6/in6_var.h> 45 # endif 46 #endif 47 48 #define EUI64_GBIT 0x01 49 #define EUI64_UBIT 0x02 50 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0) 51 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT) 52 53 #ifndef ND6_INFINITE_LIFETIME 54 # define ND6_INFINITE_LIFETIME ((uint32_t)~0) 55 #endif 56 57 /* RFC4941 constants */ 58 #define TEMP_VALID_LIFETIME 604800 /* 1 week */ 59 #define TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 60 #define REGEN_ADVANCE 5 /* seconds */ 61 #define MAX_DESYNC_FACTOR 600 /* 10 minutes */ 62 #define TEMP_IDGEN_RETRIES 3 63 64 /* RFC7217 constants */ 65 #define IDGEN_RETRIES 3 66 #define IDGEN_DELAY 1 /* second */ 67 68 /* Interface identifier length. Prefix + this == 128 for autoconf */ 69 #define ipv6_ifidlen(ifp) 64 70 #define IA6_CANAUTOCONF(ia) \ 71 ((ia)->prefix_len + ipv6_ifidlen((ia)->iface) == 128) 72 73 #ifndef IN6_ARE_MASKED_ADDR_EQUAL 74 #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 75 (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \ 76 (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \ 77 (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \ 78 (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 ) 79 #endif 80 81 #ifndef IN6ADDR_LINKLOCAL_ALLNODES_INIT 82 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \ 83 {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}} 85 #endif 86 #ifndef IN6ADDR_LINKLOCAL_ALLROUTERS_INIT 87 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \ 88 {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 89 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}} 90 #endif 91 92 /* 93 * BSD kernels don't inform userland of DAD results. 94 * See the discussion here: 95 * http://mail-index.netbsd.org/tech-net/2013/03/15/msg004019.html 96 */ 97 #ifndef __linux__ 98 /* We guard here to avoid breaking a compile on linux ppc-64 headers */ 99 # include <sys/param.h> 100 #endif 101 #ifdef BSD 102 # define IPV6_POLLADDRFLAG 103 #endif 104 105 /* This was fixed in NetBSD */ 106 #if (defined(__DragonFly_version) && __DragonFly_version >= 500704) || \ 107 (defined(__NetBSD_Version__) && __NetBSD_Version__ >= 699002000) 108 # undef IPV6_POLLADDRFLAG 109 #endif 110 111 /* Of course OpenBSD has their own special name. */ 112 #if !defined(IN6_IFF_TEMPORARY) && defined(IN6_IFF_PRIVACY) 113 #define IN6_IFF_TEMPORARY IN6_IFF_PRIVACY 114 #endif 115 116 #ifdef __sun 117 /* Solaris lacks these defines. 118 * While it supports DaD, to seems to only expose IFF_DUPLICATE 119 * so we have no way of knowing if it's tentative or not. 120 * I don't even know if Solaris has any special treatment for tentative. */ 121 # define IN6_IFF_TENTATIVE 0x02 122 # define IN6_IFF_DUPLICATED 0x04 123 # define IN6_IFF_DETACHED 0x00 124 #endif 125 126 #define IN6_IFF_NOTUSEABLE \ 127 (IN6_IFF_TENTATIVE | IN6_IFF_DUPLICATED | IN6_IFF_DETACHED) 128 129 /* 130 * If dhcpcd handles RA processing instead of the kernel, the kernel needs 131 * to either allow userland to set temporary addresses or mark an address 132 * for the kernel to manage temporary addresses from. 133 * If the kernel allows the former, a global #define is needed, otherwise 134 * the address marking will be handled in the platform specific address handler. 135 * 136 * Some BSDs do not allow userland to set temporary addresses. 137 * Linux-3.18 allows the marking of addresses from which to manage temp addrs. 138 */ 139 #if defined(IN6_IFF_TEMPORARY) && !defined(__linux__) 140 #define IPV6_MANAGETEMPADDR 141 #endif 142 143 #ifdef __linux__ 144 /* Match Linux defines to BSD */ 145 # ifdef IFA_F_TEMPORARY 146 # define IN6_IFF_TEMPORARY IFA_F_TEMPORARY 147 # endif 148 # ifdef IFA_F_OPTIMISTIC 149 # define IN6_IFF_TENTATIVE (IFA_F_TENTATIVE | IFA_F_OPTIMISTIC) 150 # else 151 # define IN6_IFF_TENTATIVE (IFA_F_TENTATIVE | 0x04) 152 # endif 153 # ifdef IF_F_DADFAILED 154 # define IN6_IFF_DUPLICATED IFA_F_DADFAILED 155 # else 156 # define IN6_IFF_DUPLICATED 0x08 157 # endif 158 # define IN6_IFF_DETACHED 0 159 #endif 160 161 #ifdef INET6 162 TAILQ_HEAD(ipv6_addrhead, ipv6_addr); 163 struct ipv6_addr { 164 TAILQ_ENTRY(ipv6_addr) next; 165 struct interface *iface; 166 struct in6_addr prefix; 167 uint8_t prefix_len; 168 uint32_t prefix_vltime; 169 uint32_t prefix_pltime; 170 struct timespec created; 171 struct timespec acquired; 172 struct in6_addr addr; 173 struct in6_addr dstaddr; 174 int addr_flags; 175 unsigned int flags; 176 char saddr[INET6_ADDRSTRLEN]; 177 uint8_t iaid[4]; 178 uint16_t ia_type; 179 int dhcp6_fd; 180 181 #ifndef SMALL 182 struct ipv6_addr *delegating_prefix; 183 struct ipv6_addrhead pd_pfxs; 184 TAILQ_ENTRY(ipv6_addr) pd_next; 185 186 uint8_t prefix_exclude_len; 187 struct in6_addr prefix_exclude; 188 #endif 189 190 void (*dadcallback)(void *); 191 int dadcounter; 192 193 struct nd_neighbor_advert *na; 194 size_t na_len; 195 int na_count; 196 197 #ifdef ALIAS_ADDR 198 char alias[IF_NAMESIZE]; 199 #endif 200 }; 201 202 #define IPV6_AF_ONLINK (1U << 0) 203 #define IPV6_AF_NEW (1U << 1) 204 #define IPV6_AF_STALE (1U << 2) 205 #define IPV6_AF_ADDED (1U << 3) 206 #define IPV6_AF_AUTOCONF (1U << 4) 207 #define IPV6_AF_DADCOMPLETED (1U << 5) 208 #define IPV6_AF_PFXDELEGATION (1U << 6) 209 #define IPV6_AF_DELEGATED (1U << 7) 210 #define IPV6_AF_NOREJECT (1U << 8) 211 #define IPV6_AF_REQUEST (1U << 9) 212 #define IPV6_AF_STATIC (1U << 10) 213 #define IPV6_AF_DELEGATEDLOG (1U << 11) 214 #define IPV6_AF_RAPFX (1U << 12) 215 #define IPV6_AF_EXTENDED (1U << 13) 216 #define IPV6_AF_REGEN (1U << 14) 217 #define IPV6_AF_ROUTER (1U << 15) 218 #define IPV6_AF_ADVERTISED (1U << 16) 219 #ifdef IPV6_MANAGETEMPADDR 220 #define IPV6_AF_TEMPORARY (1U << 17) 221 #endif 222 223 struct ll_callback { 224 TAILQ_ENTRY(ll_callback) next; 225 void (*callback)(void *); 226 void *arg; 227 }; 228 TAILQ_HEAD(ll_callback_head, ll_callback); 229 230 struct ipv6_state { 231 struct ipv6_addrhead addrs; 232 struct ll_callback_head ll_callbacks; 233 234 #ifdef IPV6_MANAGETEMPADDR 235 uint32_t desync_factor; 236 #endif 237 }; 238 239 #define IPV6_STATE(ifp) \ 240 ((struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6]) 241 #define IPV6_CSTATE(ifp) \ 242 ((const struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6]) 243 #define IPV6_STATE_RUNNING(ifp) ipv6_staticdadcompleted((ifp)) 244 245 246 int ipv6_init(struct dhcpcd_ctx *); 247 int ipv6_makestableprivate(struct in6_addr *, 248 const struct in6_addr *, int, const struct interface *, int *); 249 int ipv6_makeaddr(struct in6_addr *, struct interface *, 250 const struct in6_addr *, int, unsigned int); 251 int ipv6_mask(struct in6_addr *, int); 252 uint8_t ipv6_prefixlen(const struct in6_addr *); 253 int ipv6_userprefix( const struct in6_addr *, short prefix_len, 254 uint64_t user_number, struct in6_addr *result, short result_len); 255 void ipv6_checkaddrflags(void *); 256 void ipv6_markaddrsstale(struct interface *, unsigned int); 257 void ipv6_deletestaleaddrs(struct interface *); 258 int ipv6_addaddr(struct ipv6_addr *, struct timespec *); 259 int ipv6_doaddr(struct ipv6_addr *, struct timespec *); 260 ssize_t ipv6_addaddrs(struct ipv6_addrhead *addrs); 261 void ipv6_deleteaddr(struct ipv6_addr *); 262 void ipv6_freedrop_addrs(struct ipv6_addrhead *, int, unsigned int, 263 const struct interface *); 264 void ipv6_handleifa(struct dhcpcd_ctx *ctx, int, struct if_head *, 265 const char *, const struct in6_addr *, uint8_t, 266 const struct in6_addr *, int, pid_t); 267 int ipv6_handleifa_addrs(int, struct ipv6_addrhead *, const struct ipv6_addr *, 268 pid_t); 269 struct ipv6_addr *ipv6_iffindaddr(struct interface *, 270 const struct in6_addr *, int); 271 int ipv6_hasaddr(const struct interface *); 272 struct ipv6_addr *ipv6_anyglobal(struct interface *); 273 int ipv6_findaddrmatch(const struct ipv6_addr *, const struct in6_addr *, 274 unsigned int); 275 struct ipv6_addr *ipv6_findaddr(struct dhcpcd_ctx *, 276 const struct in6_addr *, unsigned int); 277 struct ipv6_addr *ipv6_findmaskaddr(struct dhcpcd_ctx *, 278 const struct in6_addr *); 279 struct ipv6_addr *ipv6_finddstaddr(struct dhcpcd_ctx *, 280 const struct in6_addr *); 281 #define ipv6_linklocal(ifp) ipv6_iffindaddr((ifp), NULL, IN6_IFF_NOTUSEABLE) 282 int ipv6_addlinklocalcallback(struct interface *, void (*)(void *), void *); 283 void ipv6_setscope(struct sockaddr_in6 *, unsigned int); 284 unsigned int ipv6_getscope(const struct sockaddr_in6 *); 285 struct ipv6_addr *ipv6_newaddr(struct interface *, const struct in6_addr *, 286 uint8_t, unsigned int); 287 void ipv6_freeaddr(struct ipv6_addr *); 288 void ipv6_freedrop(struct interface *, int); 289 #define ipv6_free(ifp) ipv6_freedrop((ifp), 0) 290 #define ipv6_drop(ifp) ipv6_freedrop((ifp), 2) 291 292 #ifdef IPV6_MANAGETEMPADDR 293 struct ipv6_addr *ipv6_createtempaddr(struct ipv6_addr *, 294 const struct timespec *); 295 struct ipv6_addr *ipv6_settemptime(struct ipv6_addr *, int); 296 void ipv6_addtempaddrs(struct interface *, struct timespec *); 297 void ipv6_regentempaddrs(void *); 298 #endif 299 300 int ipv6_start(struct interface *); 301 int ipv6_staticdadcompleted(const struct interface *); 302 int ipv6_startstatic(struct interface *); 303 ssize_t ipv6_env(FILE *, const char *, const struct interface *); 304 void ipv6_ctxfree(struct dhcpcd_ctx *); 305 bool inet6_getroutes(struct dhcpcd_ctx *, rb_tree_t *); 306 #endif /* INET6 */ 307 308 #endif /* INET6_H */ 309
Indexes created Tue May 26 00:24:38 UTC 2026