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contrib/dhcpcd/src/ipv6.h

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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2021 Roy Marples <roy@marples.name>
* All rights reserved
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef IPV6_H
#define IPV6_H
#include <sys/uio.h>
#include <netinet/in.h>
#include "config.h"
#include "if.h"
#ifndef __linux__
# if !defined(__QNX__) && !defined(__sun)
# include <sys/endian.h>
# endif
# include <net/if.h>
# ifndef __sun
# include <netinet6/in6_var.h>
# endif
#endif
#define EUI64_GBIT 0x01
#define EUI64_UBIT 0x02
#define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
#define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
#ifndef ND6_INFINITE_LIFETIME
# define ND6_INFINITE_LIFETIME ((uint32_t)~0)
#endif
/* RFC4941 constants */
#define TEMP_VALID_LIFETIME 604800 /* 1 week */
#define TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
#define REGEN_ADVANCE 5 /* seconds */
#define MAX_DESYNC_FACTOR 600 /* 10 minutes */
#define TEMP_IDGEN_RETRIES 3
/* RFC7217 constants */
#define IDGEN_RETRIES 3
#define IDGEN_DELAY 1 /* second */
/* Interface identifier length. Prefix + this == 128 for autoconf */
#define ipv6_ifidlen(ifp) 64
#define IA6_CANAUTOCONF(ia) \
((ia)->prefix_len + ipv6_ifidlen((ia)->iface) == 128)
#ifndef IN6_ARE_MASKED_ADDR_EQUAL
#define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \
(((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
(((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
(((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
(((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
#endif
#ifndef IN6ADDR_LINKLOCAL_ALLNODES_INIT
#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
#endif
#ifndef IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
#endif
/*
* BSD kernels don't inform userland of DAD results.
* See the discussion here:
* http://mail-index.netbsd.org/tech-net/2013/03/15/msg004019.html
*/
#ifndef __linux__
/* We guard here to avoid breaking a compile on linux ppc-64 headers */
# include <sys/param.h>
#endif
#ifdef BSD
# define IPV6_POLLADDRFLAG
#endif
/* This was fixed in NetBSD */
#if (defined(__DragonFly_version) && __DragonFly_version >= 500704) || \
(defined(__NetBSD_Version__) && __NetBSD_Version__ >= 699002000)
# undef IPV6_POLLADDRFLAG
#endif
/* Of course OpenBSD has their own special name. */
#if !defined(IN6_IFF_TEMPORARY) && defined(IN6_IFF_PRIVACY)
#define IN6_IFF_TEMPORARY IN6_IFF_PRIVACY
#endif
#ifdef __sun
/* Solaris lacks these defines.
* While it supports DaD, to seems to only expose IFF_DUPLICATE
* so we have no way of knowing if it's tentative or not.
* I don't even know if Solaris has any special treatment for tentative. */
# define IN6_IFF_TENTATIVE 0x02
# define IN6_IFF_DUPLICATED 0x04
# define IN6_IFF_DETACHED 0x00
#endif
#define IN6_IFF_NOTUSEABLE \
(IN6_IFF_TENTATIVE | IN6_IFF_DUPLICATED | IN6_IFF_DETACHED)
/*
* If dhcpcd handles RA processing instead of the kernel, the kernel needs
* to either allow userland to set temporary addresses or mark an address
* for the kernel to manage temporary addresses from.
* If the kernel allows the former, a global #define is needed, otherwise
* the address marking will be handled in the platform specific address handler.
*
* Some BSDs do not allow userland to set temporary addresses.
* Linux-3.18 allows the marking of addresses from which to manage temp addrs.
*/
#if defined(IN6_IFF_TEMPORARY) && !defined(__linux__)
#define IPV6_MANAGETEMPADDR
#endif
#ifdef __linux__
/* Match Linux defines to BSD */
# ifdef IFA_F_TEMPORARY
# define IN6_IFF_TEMPORARY IFA_F_TEMPORARY
# endif
# ifdef IFA_F_OPTIMISTIC
# define IN6_IFF_TENTATIVE (IFA_F_TENTATIVE | IFA_F_OPTIMISTIC)
# else
# define IN6_IFF_TENTATIVE (IFA_F_TENTATIVE | 0x04)
# endif
# ifdef IF_F_DADFAILED
# define IN6_IFF_DUPLICATED IFA_F_DADFAILED
# else
# define IN6_IFF_DUPLICATED 0x08
# endif
# define IN6_IFF_DETACHED 0
#endif
/*
* ND6 Advertising is only used for IP address sharing to prefer
* the address on a specific interface.
* This just fails to work on OpenBSD and causes erroneous duplicate
* address messages on BSD's other then DragonFly and NetBSD.
*/
#if !defined(SMALL) && \
((defined(__DragonFly_version) && __DragonFly_version >= 500703) || \
(defined(__NetBSD_Version__) && __NetBSD_Version__ >= 899002800) || \
defined(__linux__) || defined(__sun))
# define ND6_ADVERTISE
#endif
#ifdef INET6
TAILQ_HEAD(ipv6_addrhead, ipv6_addr);
struct ipv6_addr {
TAILQ_ENTRY(ipv6_addr) next;
struct interface *iface;
struct in6_addr prefix;
uint8_t prefix_len;
uint32_t prefix_vltime;
uint32_t prefix_pltime;
struct timespec created;
struct timespec acquired;
struct in6_addr addr;
int addr_flags;
unsigned int flags;
char saddr[INET6_ADDRSTRLEN];
uint8_t iaid[4];
uint16_t ia_type;
int dhcp6_fd;
#ifndef SMALL
struct ipv6_addr *delegating_prefix;
struct ipv6_addrhead pd_pfxs;
TAILQ_ENTRY(ipv6_addr) pd_next;
uint8_t prefix_exclude_len;
struct in6_addr prefix_exclude;
#endif
void (*dadcallback)(void *);
int dadcounter;
struct nd_neighbor_advert *na;
size_t na_len;
int na_count;
#ifdef ALIAS_ADDR
char alias[IF_NAMESIZE];
#endif
};
#define IPV6_AF_ONLINK (1U << 0)
#define IPV6_AF_NEW (1U << 1)
#define IPV6_AF_STALE (1U << 2)
#define IPV6_AF_ADDED (1U << 3)
#define IPV6_AF_AUTOCONF (1U << 4)
#define IPV6_AF_DADCOMPLETED (1U << 5)
#define IPV6_AF_DELEGATED (1U << 6)
#define IPV6_AF_DELEGATEDPFX (1U << 7)
#define IPV6_AF_NOREJECT (1U << 8)
#define IPV6_AF_REQUEST (1U << 9)
#define IPV6_AF_STATIC (1U << 10)
#define IPV6_AF_DELEGATEDLOG (1U << 11)
#define IPV6_AF_RAPFX (1U << 12)
#define IPV6_AF_EXTENDED (1U << 13)
#define IPV6_AF_REGEN (1U << 14)
#define IPV6_AF_ROUTER (1U << 15)
#ifdef IPV6_MANAGETEMPADDR
#define IPV6_AF_TEMPORARY (1U << 16)
#endif
struct ll_callback {
TAILQ_ENTRY(ll_callback) next;
void (*callback)(void *);
void *arg;
};
TAILQ_HEAD(ll_callback_head, ll_callback);
struct ipv6_state {
struct ipv6_addrhead addrs;
struct ll_callback_head ll_callbacks;
#ifdef IPV6_MANAGETEMPADDR
uint32_t desync_factor;
#endif
};
#define IPV6_STATE(ifp) \
((struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6])
#define IPV6_CSTATE(ifp) \
((const struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6])
#define IPV6_STATE_RUNNING(ifp) ipv6_staticdadcompleted((ifp))
int ipv6_init(struct dhcpcd_ctx *);
int ipv6_makestableprivate(struct in6_addr *,
const struct in6_addr *, int, const struct interface *, int *);
int ipv6_makeaddr(struct in6_addr *, struct interface *,
const struct in6_addr *, int, unsigned int);
int ipv6_mask(struct in6_addr *, int);
uint8_t ipv6_prefixlen(const struct in6_addr *);
int ipv6_userprefix( const struct in6_addr *, short prefix_len,
uint64_t user_number, struct in6_addr *result, short result_len);
void ipv6_checkaddrflags(void *);
void ipv6_markaddrsstale(struct interface *, unsigned int);
void ipv6_deletestaleaddrs(struct interface *);
int ipv6_addaddr(struct ipv6_addr *, const struct timespec *);
int ipv6_doaddr(struct ipv6_addr *, struct timespec *);
ssize_t ipv6_addaddrs(struct ipv6_addrhead *addrs);
void ipv6_deleteaddr(struct ipv6_addr *);
void ipv6_freedrop_addrs(struct ipv6_addrhead *, int,
const struct interface *);
void ipv6_handleifa(struct dhcpcd_ctx *ctx, int, struct if_head *,
const char *, const struct in6_addr *, uint8_t, int, pid_t);
int ipv6_handleifa_addrs(int, struct ipv6_addrhead *, const struct ipv6_addr *,
pid_t);
struct ipv6_addr *ipv6_iffindaddr(struct interface *,
const struct in6_addr *, int);
int ipv6_hasaddr(const struct interface *);
struct ipv6_addr *ipv6_anyglobal(struct interface *);
int ipv6_findaddrmatch(const struct ipv6_addr *, const struct in6_addr *,
unsigned int);
struct ipv6_addr *ipv6_findaddr(struct dhcpcd_ctx *,
const struct in6_addr *, unsigned int);
struct ipv6_addr *ipv6_findmaskaddr(struct dhcpcd_ctx *,
const struct in6_addr *);
#define ipv6_linklocal(ifp) ipv6_iffindaddr((ifp), NULL, IN6_IFF_NOTUSEABLE)
int ipv6_addlinklocalcallback(struct interface *, void (*)(void *), void *);
void ipv6_setscope(struct sockaddr_in6 *, unsigned int);
unsigned int ipv6_getscope(const struct sockaddr_in6 *);
struct ipv6_addr *ipv6_newaddr(struct interface *, const struct in6_addr *,
uint8_t, unsigned int);
void ipv6_freeaddr(struct ipv6_addr *);
void ipv6_freedrop(struct interface *, int);
#define ipv6_free(ifp) ipv6_freedrop((ifp), 0)
#define ipv6_drop(ifp) ipv6_freedrop((ifp), 2)
#ifdef IPV6_MANAGETEMPADDR
struct ipv6_addr *ipv6_createtempaddr(struct ipv6_addr *,
const struct timespec *);
struct ipv6_addr *ipv6_settemptime(struct ipv6_addr *, int);
void ipv6_addtempaddrs(struct interface *, const struct timespec *);
void ipv6_regentempaddrs(void *);
#endif
int ipv6_start(struct interface *);
int ipv6_staticdadcompleted(const struct interface *);
int ipv6_startstatic(struct interface *);
ssize_t ipv6_env(FILE *, const char *, const struct interface *);
void ipv6_ctxfree(struct dhcpcd_ctx *);
bool inet6_getroutes(struct dhcpcd_ctx *, rb_tree_t *);
#endif /* INET6 */
#endif /* INET6_H */