18d36e1dfSRoy Marples /* SPDX-License-Identifier: BSD-2-Clause */ 27827cba2SAaron LI /* 37827cba2SAaron LI * dhcpcd - DHCP client daemon 4*80aa9461SRoy Marples * Copyright (c) 2006-2023 Roy Marples <roy@marples.name> 57827cba2SAaron LI * All rights reserved 67827cba2SAaron LI 77827cba2SAaron LI * Redistribution and use in source and binary forms, with or without 87827cba2SAaron LI * modification, are permitted provided that the following conditions 97827cba2SAaron LI * are met: 107827cba2SAaron LI * 1. Redistributions of source code must retain the above copyright 117827cba2SAaron LI * notice, this list of conditions and the following disclaimer. 127827cba2SAaron LI * 2. Redistributions in binary form must reproduce the above copyright 137827cba2SAaron LI * notice, this list of conditions and the following disclaimer in the 147827cba2SAaron LI * documentation and/or other materials provided with the distribution. 157827cba2SAaron LI * 167827cba2SAaron LI * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 177827cba2SAaron LI * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 187827cba2SAaron LI * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 197827cba2SAaron LI * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 207827cba2SAaron LI * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 217827cba2SAaron LI * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 227827cba2SAaron LI * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 237827cba2SAaron LI * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 247827cba2SAaron LI * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 257827cba2SAaron LI * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 267827cba2SAaron LI * SUCH DAMAGE. 277827cba2SAaron LI */ 287827cba2SAaron LI 297827cba2SAaron LI #ifndef IPV6_H 307827cba2SAaron LI #define IPV6_H 317827cba2SAaron LI 327827cba2SAaron LI #include <sys/uio.h> 337827cba2SAaron LI #include <netinet/in.h> 347827cba2SAaron LI 357827cba2SAaron LI #include "config.h" 367827cba2SAaron LI #include "if.h" 377827cba2SAaron LI 387827cba2SAaron LI #ifndef __linux__ 397827cba2SAaron LI # if !defined(__QNX__) && !defined(__sun) 407827cba2SAaron LI # include <sys/endian.h> 417827cba2SAaron LI # endif 427827cba2SAaron LI # include <net/if.h> 437827cba2SAaron LI # ifndef __sun 447827cba2SAaron LI # include <netinet6/in6_var.h> 457827cba2SAaron LI # endif 467827cba2SAaron LI #endif 477827cba2SAaron LI 487827cba2SAaron LI #define EUI64_GBIT 0x01 497827cba2SAaron LI #define EUI64_UBIT 0x02 507827cba2SAaron LI #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0) 517827cba2SAaron LI #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT) 527827cba2SAaron LI 537827cba2SAaron LI #ifndef ND6_INFINITE_LIFETIME 547827cba2SAaron LI # define ND6_INFINITE_LIFETIME ((uint32_t)~0) 557827cba2SAaron LI #endif 567827cba2SAaron LI 577827cba2SAaron LI /* RFC4941 constants */ 587827cba2SAaron LI #define TEMP_VALID_LIFETIME 604800 /* 1 week */ 597827cba2SAaron LI #define TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 607827cba2SAaron LI #define REGEN_ADVANCE 5 /* seconds */ 617827cba2SAaron LI #define MAX_DESYNC_FACTOR 600 /* 10 minutes */ 627827cba2SAaron LI #define TEMP_IDGEN_RETRIES 3 637827cba2SAaron LI 647827cba2SAaron LI /* RFC7217 constants */ 657827cba2SAaron LI #define IDGEN_RETRIES 3 667827cba2SAaron LI #define IDGEN_DELAY 1 /* second */ 677827cba2SAaron LI 686e63cc1fSRoy Marples /* Interface identifier length. Prefix + this == 128 for autoconf */ 696e63cc1fSRoy Marples #define ipv6_ifidlen(ifp) 64 706e63cc1fSRoy Marples #define IA6_CANAUTOCONF(ia) \ 716e63cc1fSRoy Marples ((ia)->prefix_len + ipv6_ifidlen((ia)->iface) == 128) 726e63cc1fSRoy Marples 737827cba2SAaron LI #ifndef IN6_ARE_MASKED_ADDR_EQUAL 747827cba2SAaron LI #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 757827cba2SAaron LI (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \ 767827cba2SAaron LI (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \ 777827cba2SAaron LI (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \ 787827cba2SAaron LI (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 ) 797827cba2SAaron LI #endif 807827cba2SAaron LI 818d36e1dfSRoy Marples #ifndef IN6ADDR_LINKLOCAL_ALLNODES_INIT 828d36e1dfSRoy Marples #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \ 838d36e1dfSRoy Marples {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 848d36e1dfSRoy Marples 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}} 858d36e1dfSRoy Marples #endif 868d36e1dfSRoy Marples #ifndef IN6ADDR_LINKLOCAL_ALLROUTERS_INIT 878d36e1dfSRoy Marples #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \ 888d36e1dfSRoy Marples {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 898d36e1dfSRoy Marples 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}} 908d36e1dfSRoy Marples #endif 918d36e1dfSRoy Marples 927827cba2SAaron LI /* 937827cba2SAaron LI * BSD kernels don't inform userland of DAD results. 947827cba2SAaron LI * See the discussion here: 957827cba2SAaron LI * http://mail-index.netbsd.org/tech-net/2013/03/15/msg004019.html 967827cba2SAaron LI */ 977827cba2SAaron LI #ifndef __linux__ 987827cba2SAaron LI /* We guard here to avoid breaking a compile on linux ppc-64 headers */ 997827cba2SAaron LI # include <sys/param.h> 1007827cba2SAaron LI #endif 1017827cba2SAaron LI #ifdef BSD 1027827cba2SAaron LI # define IPV6_POLLADDRFLAG 1037827cba2SAaron LI #endif 1047827cba2SAaron LI 1057827cba2SAaron LI /* This was fixed in NetBSD */ 1068d36e1dfSRoy Marples #if (defined(__DragonFly_version) && __DragonFly_version >= 500704) || \ 1078d36e1dfSRoy Marples (defined(__NetBSD_Version__) && __NetBSD_Version__ >= 699002000) 1087827cba2SAaron LI # undef IPV6_POLLADDRFLAG 1097827cba2SAaron LI #endif 1107827cba2SAaron LI 1116e63cc1fSRoy Marples /* Of course OpenBSD has their own special name. */ 1126e63cc1fSRoy Marples #if !defined(IN6_IFF_TEMPORARY) && defined(IN6_IFF_PRIVACY) 1136e63cc1fSRoy Marples #define IN6_IFF_TEMPORARY IN6_IFF_PRIVACY 1146e63cc1fSRoy Marples #endif 1156e63cc1fSRoy Marples 1167827cba2SAaron LI #ifdef __sun 1177827cba2SAaron LI /* Solaris lacks these defines. 1187827cba2SAaron LI * While it supports DaD, to seems to only expose IFF_DUPLICATE 1197827cba2SAaron LI * so we have no way of knowing if it's tentative or not. 1207827cba2SAaron LI * I don't even know if Solaris has any special treatment for tentative. */ 1218d36e1dfSRoy Marples # define IN6_IFF_TENTATIVE 0x02 1227827cba2SAaron LI # define IN6_IFF_DUPLICATED 0x04 1238d36e1dfSRoy Marples # define IN6_IFF_DETACHED 0x00 1247827cba2SAaron LI #endif 1257827cba2SAaron LI 1267827cba2SAaron LI #define IN6_IFF_NOTUSEABLE \ 1277827cba2SAaron LI (IN6_IFF_TENTATIVE | IN6_IFF_DUPLICATED | IN6_IFF_DETACHED) 1287827cba2SAaron LI 1297827cba2SAaron LI /* 1307827cba2SAaron LI * If dhcpcd handles RA processing instead of the kernel, the kernel needs 1317827cba2SAaron LI * to either allow userland to set temporary addresses or mark an address 1327827cba2SAaron LI * for the kernel to manage temporary addresses from. 1337827cba2SAaron LI * If the kernel allows the former, a global #define is needed, otherwise 1347827cba2SAaron LI * the address marking will be handled in the platform specific address handler. 1357827cba2SAaron LI * 1367827cba2SAaron LI * Some BSDs do not allow userland to set temporary addresses. 1377827cba2SAaron LI * Linux-3.18 allows the marking of addresses from which to manage temp addrs. 1387827cba2SAaron LI */ 1397827cba2SAaron LI #if defined(IN6_IFF_TEMPORARY) && !defined(__linux__) 1407827cba2SAaron LI #define IPV6_MANAGETEMPADDR 1417827cba2SAaron LI #endif 1427827cba2SAaron LI 1437827cba2SAaron LI #ifdef __linux__ 1447827cba2SAaron LI /* Match Linux defines to BSD */ 1457827cba2SAaron LI # ifdef IFA_F_TEMPORARY 1467827cba2SAaron LI # define IN6_IFF_TEMPORARY IFA_F_TEMPORARY 1477827cba2SAaron LI # endif 1487827cba2SAaron LI # ifdef IFA_F_OPTIMISTIC 1497827cba2SAaron LI # define IN6_IFF_TENTATIVE (IFA_F_TENTATIVE | IFA_F_OPTIMISTIC) 1507827cba2SAaron LI # else 1517827cba2SAaron LI # define IN6_IFF_TENTATIVE (IFA_F_TENTATIVE | 0x04) 1527827cba2SAaron LI # endif 1537827cba2SAaron LI # ifdef IF_F_DADFAILED 1547827cba2SAaron LI # define IN6_IFF_DUPLICATED IFA_F_DADFAILED 1557827cba2SAaron LI # else 1567827cba2SAaron LI # define IN6_IFF_DUPLICATED 0x08 1577827cba2SAaron LI # endif 1587827cba2SAaron LI # define IN6_IFF_DETACHED 0 1597827cba2SAaron LI #endif 1607827cba2SAaron LI 1618d36e1dfSRoy Marples /* 1628d36e1dfSRoy Marples * ND6 Advertising is only used for IP address sharing to prefer 1638d36e1dfSRoy Marples * the address on a specific interface. 1648d36e1dfSRoy Marples * This just fails to work on OpenBSD and causes erroneous duplicate 1658d36e1dfSRoy Marples * address messages on BSD's other then DragonFly and NetBSD. 1668d36e1dfSRoy Marples */ 1678d36e1dfSRoy Marples #if !defined(SMALL) && \ 1688d36e1dfSRoy Marples ((defined(__DragonFly_version) && __DragonFly_version >= 500703) || \ 1698d36e1dfSRoy Marples (defined(__NetBSD_Version__) && __NetBSD_Version__ >= 899002800) || \ 1708d36e1dfSRoy Marples defined(__linux__) || defined(__sun)) 1718d36e1dfSRoy Marples # define ND6_ADVERTISE 1728d36e1dfSRoy Marples #endif 1738d36e1dfSRoy Marples 1748d36e1dfSRoy Marples #ifdef INET6 1757827cba2SAaron LI TAILQ_HEAD(ipv6_addrhead, ipv6_addr); 1767827cba2SAaron LI struct ipv6_addr { 1777827cba2SAaron LI TAILQ_ENTRY(ipv6_addr) next; 1787827cba2SAaron LI struct interface *iface; 1797827cba2SAaron LI struct in6_addr prefix; 1807827cba2SAaron LI uint8_t prefix_len; 1817827cba2SAaron LI uint32_t prefix_vltime; 1827827cba2SAaron LI uint32_t prefix_pltime; 1837827cba2SAaron LI struct timespec created; 1847827cba2SAaron LI struct timespec acquired; 1857827cba2SAaron LI struct in6_addr addr; 1867827cba2SAaron LI int addr_flags; 1877827cba2SAaron LI unsigned int flags; 1887827cba2SAaron LI char saddr[INET6_ADDRSTRLEN]; 1897827cba2SAaron LI uint8_t iaid[4]; 1907827cba2SAaron LI uint16_t ia_type; 1917827cba2SAaron LI int dhcp6_fd; 1927827cba2SAaron LI 1937827cba2SAaron LI #ifndef SMALL 1947827cba2SAaron LI struct ipv6_addr *delegating_prefix; 1957827cba2SAaron LI struct ipv6_addrhead pd_pfxs; 1967827cba2SAaron LI TAILQ_ENTRY(ipv6_addr) pd_next; 1977827cba2SAaron LI 1987827cba2SAaron LI uint8_t prefix_exclude_len; 1997827cba2SAaron LI struct in6_addr prefix_exclude; 2007827cba2SAaron LI #endif 2017827cba2SAaron LI 2027827cba2SAaron LI void (*dadcallback)(void *); 2037827cba2SAaron LI int dadcounter; 2047827cba2SAaron LI 2058d36e1dfSRoy Marples struct nd_neighbor_advert *na; 2068d36e1dfSRoy Marples size_t na_len; 2078d36e1dfSRoy Marples int na_count; 2088d36e1dfSRoy Marples 2097827cba2SAaron LI #ifdef ALIAS_ADDR 2107827cba2SAaron LI char alias[IF_NAMESIZE]; 2117827cba2SAaron LI #endif 2127827cba2SAaron LI }; 2137827cba2SAaron LI 2147827cba2SAaron LI #define IPV6_AF_ONLINK (1U << 0) 2157827cba2SAaron LI #define IPV6_AF_NEW (1U << 1) 2167827cba2SAaron LI #define IPV6_AF_STALE (1U << 2) 2177827cba2SAaron LI #define IPV6_AF_ADDED (1U << 3) 2187827cba2SAaron LI #define IPV6_AF_AUTOCONF (1U << 4) 219d4fb1e02SRoy Marples #define IPV6_AF_DADCOMPLETED (1U << 5) 220d4fb1e02SRoy Marples #define IPV6_AF_DELEGATED (1U << 6) 221d4fb1e02SRoy Marples #define IPV6_AF_DELEGATEDPFX (1U << 7) 222d4fb1e02SRoy Marples #define IPV6_AF_NOREJECT (1U << 8) 223d4fb1e02SRoy Marples #define IPV6_AF_REQUEST (1U << 9) 224d4fb1e02SRoy Marples #define IPV6_AF_STATIC (1U << 10) 225d4fb1e02SRoy Marples #define IPV6_AF_DELEGATEDLOG (1U << 11) 226d4fb1e02SRoy Marples #define IPV6_AF_RAPFX (1U << 12) 227d4fb1e02SRoy Marples #define IPV6_AF_EXTENDED (1U << 13) 228d4fb1e02SRoy Marples #define IPV6_AF_REGEN (1U << 14) 229cc34ba0cSRoy Marples #define IPV6_AF_ROUTER (1U << 15) 2307827cba2SAaron LI #ifdef IPV6_MANAGETEMPADDR 231cc34ba0cSRoy Marples #define IPV6_AF_TEMPORARY (1U << 16) 2327827cba2SAaron LI #endif 2337827cba2SAaron LI 2347827cba2SAaron LI struct ll_callback { 2357827cba2SAaron LI TAILQ_ENTRY(ll_callback) next; 2367827cba2SAaron LI void (*callback)(void *); 2377827cba2SAaron LI void *arg; 2387827cba2SAaron LI }; 2397827cba2SAaron LI TAILQ_HEAD(ll_callback_head, ll_callback); 2407827cba2SAaron LI 2417827cba2SAaron LI struct ipv6_state { 2427827cba2SAaron LI struct ipv6_addrhead addrs; 2437827cba2SAaron LI struct ll_callback_head ll_callbacks; 2447827cba2SAaron LI 2457827cba2SAaron LI #ifdef IPV6_MANAGETEMPADDR 2466e63cc1fSRoy Marples uint32_t desync_factor; 2477827cba2SAaron LI #endif 2487827cba2SAaron LI }; 2497827cba2SAaron LI 2507827cba2SAaron LI #define IPV6_STATE(ifp) \ 2517827cba2SAaron LI ((struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6]) 2527827cba2SAaron LI #define IPV6_CSTATE(ifp) \ 2537827cba2SAaron LI ((const struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6]) 2547827cba2SAaron LI #define IPV6_STATE_RUNNING(ifp) ipv6_staticdadcompleted((ifp)) 2557827cba2SAaron LI 2567827cba2SAaron LI 2577827cba2SAaron LI int ipv6_init(struct dhcpcd_ctx *); 258280986e4SRoy Marples int ipv6_makestableprivate(struct in6_addr *, 259280986e4SRoy Marples const struct in6_addr *, int, const struct interface *, int *); 2607827cba2SAaron LI int ipv6_makeaddr(struct in6_addr *, struct interface *, 261280986e4SRoy Marples const struct in6_addr *, int, unsigned int); 2627827cba2SAaron LI int ipv6_mask(struct in6_addr *, int); 2637827cba2SAaron LI uint8_t ipv6_prefixlen(const struct in6_addr *); 2647827cba2SAaron LI int ipv6_userprefix( const struct in6_addr *, short prefix_len, 2657827cba2SAaron LI uint64_t user_number, struct in6_addr *result, short result_len); 2667827cba2SAaron LI void ipv6_checkaddrflags(void *); 2677827cba2SAaron LI void ipv6_markaddrsstale(struct interface *, unsigned int); 2687827cba2SAaron LI void ipv6_deletestaleaddrs(struct interface *); 2697827cba2SAaron LI int ipv6_addaddr(struct ipv6_addr *, const struct timespec *); 270ce6cc02eSRoy Marples int ipv6_doaddr(struct ipv6_addr *, struct timespec *); 2717827cba2SAaron LI ssize_t ipv6_addaddrs(struct ipv6_addrhead *addrs); 2727827cba2SAaron LI void ipv6_deleteaddr(struct ipv6_addr *); 2737827cba2SAaron LI void ipv6_freedrop_addrs(struct ipv6_addrhead *, int, 2747827cba2SAaron LI const struct interface *); 2757827cba2SAaron LI void ipv6_handleifa(struct dhcpcd_ctx *ctx, int, struct if_head *, 2767827cba2SAaron LI const char *, const struct in6_addr *, uint8_t, int, pid_t); 2777827cba2SAaron LI int ipv6_handleifa_addrs(int, struct ipv6_addrhead *, const struct ipv6_addr *, 2787827cba2SAaron LI pid_t); 2797827cba2SAaron LI struct ipv6_addr *ipv6_iffindaddr(struct interface *, 2807827cba2SAaron LI const struct in6_addr *, int); 2817827cba2SAaron LI int ipv6_hasaddr(const struct interface *); 28212af092aSRoy Marples struct ipv6_addr *ipv6_anyglobal(struct interface *); 2837827cba2SAaron LI int ipv6_findaddrmatch(const struct ipv6_addr *, const struct in6_addr *, 2847827cba2SAaron LI unsigned int); 2857827cba2SAaron LI struct ipv6_addr *ipv6_findaddr(struct dhcpcd_ctx *, 2867827cba2SAaron LI const struct in6_addr *, unsigned int); 2877827cba2SAaron LI struct ipv6_addr *ipv6_findmaskaddr(struct dhcpcd_ctx *, 2887827cba2SAaron LI const struct in6_addr *); 2897827cba2SAaron LI #define ipv6_linklocal(ifp) ipv6_iffindaddr((ifp), NULL, IN6_IFF_NOTUSEABLE) 2907827cba2SAaron LI int ipv6_addlinklocalcallback(struct interface *, void (*)(void *), void *); 291d4fb1e02SRoy Marples void ipv6_setscope(struct sockaddr_in6 *, unsigned int); 292d4fb1e02SRoy Marples unsigned int ipv6_getscope(const struct sockaddr_in6 *); 293d4fb1e02SRoy Marples struct ipv6_addr *ipv6_newaddr(struct interface *, const struct in6_addr *, 294d4fb1e02SRoy Marples uint8_t, unsigned int); 2957827cba2SAaron LI void ipv6_freeaddr(struct ipv6_addr *); 2967827cba2SAaron LI void ipv6_freedrop(struct interface *, int); 2977827cba2SAaron LI #define ipv6_free(ifp) ipv6_freedrop((ifp), 0) 2987827cba2SAaron LI #define ipv6_drop(ifp) ipv6_freedrop((ifp), 2) 2997827cba2SAaron LI 3007827cba2SAaron LI #ifdef IPV6_MANAGETEMPADDR 3017827cba2SAaron LI struct ipv6_addr *ipv6_createtempaddr(struct ipv6_addr *, 3027827cba2SAaron LI const struct timespec *); 3037827cba2SAaron LI struct ipv6_addr *ipv6_settemptime(struct ipv6_addr *, int); 3047827cba2SAaron LI void ipv6_addtempaddrs(struct interface *, const struct timespec *); 305280986e4SRoy Marples void ipv6_regentempaddrs(void *); 3067827cba2SAaron LI #endif 3077827cba2SAaron LI 3087827cba2SAaron LI int ipv6_start(struct interface *); 3097827cba2SAaron LI int ipv6_staticdadcompleted(const struct interface *); 3107827cba2SAaron LI int ipv6_startstatic(struct interface *); 3118d36e1dfSRoy Marples ssize_t ipv6_env(FILE *, const char *, const struct interface *); 3127827cba2SAaron LI void ipv6_ctxfree(struct dhcpcd_ctx *); 3138d36e1dfSRoy Marples bool inet6_getroutes(struct dhcpcd_ctx *, rb_tree_t *); 3148d36e1dfSRoy Marples #endif /* INET6 */ 3157827cba2SAaron LI 3168d36e1dfSRoy Marples #endif /* INET6_H */ 317