/* $KAME: rtadvd.h,v 1.26 2003/08/05 12:34:23 itojun Exp $ */ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 1998 WIDE Project. * Copyright (C) 2011 Hiroki Sato * 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. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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. */ #include #define ELM_MALLOC(p,error_action) \ do { \ p = malloc(sizeof(*p)); \ if (p == NULL) { \ syslog(LOG_ERR, "<%s> malloc failed: %s", \ __func__, strerror(errno)); \ error_action; \ } \ memset(p, 0, sizeof(*p)); \ } while(0) #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \ {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}} #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \ {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}} #define IN6ADDR_SITELOCAL_ALLROUTERS_INIT \ {{{ 0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}} extern struct sockaddr_in6 sin6_linklocal_allnodes; extern struct sockaddr_in6 sin6_linklocal_allrouters; extern struct sockaddr_in6 sin6_sitelocal_allrouters; /* * RFC 3542 API deprecates IPV6_PKTINFO in favor of * IPV6_RECVPKTINFO */ #ifndef IPV6_RECVPKTINFO #ifdef IPV6_PKTINFO #define IPV6_RECVPKTINFO IPV6_PKTINFO #endif #endif /* * RFC 3542 API deprecates IPV6_HOPLIMIT in favor of * IPV6_RECVHOPLIMIT */ #ifndef IPV6_RECVHOPLIMIT #ifdef IPV6_HOPLIMIT #define IPV6_RECVHOPLIMIT IPV6_HOPLIMIT #endif #endif /* protocol constants and default values */ #define DEF_MAXRTRADVINTERVAL 600 #define DEF_ADVLINKMTU 0 #define DEF_ADVREACHABLETIME 0 #define DEF_ADVRETRANSTIMER 0 #define DEF_ADVCURHOPLIMIT 64 #define DEF_ADVVALIDLIFETIME 2592000 #define DEF_ADVPREFERREDLIFETIME 604800 #define MAXROUTERLIFETIME 9000 #define MIN_MAXINTERVAL 4 #define MAX_MAXINTERVAL 1800 #define MIN_MININTERVAL 3 #define MAXREACHABLETIME 3600000 #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 #define MAX_FINAL_RTR_ADVERTISEMENTS 3 #define MIN_DELAY_BETWEEN_RAS 3 #define MAX_RA_DELAY_TIME 500000 /* usec */ #define PREFIX_FROM_KERNEL 1 #define PREFIX_FROM_CONFIG 2 #define PREFIX_FROM_DYNAMIC 3 struct prefix { TAILQ_ENTRY(prefix) pfx_next; struct rainfo *pfx_rainfo; /* back pointer to the interface */ /* * Expiration timer. This is used when a prefix derived from * the kernel is deleted. */ struct rtadvd_timer *pfx_timer; uint32_t pfx_validlifetime; /* AdvValidLifetime */ uint32_t pfx_vltimeexpire; /* Expiration of vltime */ uint32_t pfx_preflifetime; /* AdvPreferredLifetime */ uint32_t pfx_pltimeexpire; /* Expiration of pltime */ int pfx_onlinkflg; /* bool: AdvOnLinkFlag */ int pfx_autoconfflg; /* bool: AdvAutonomousFlag */ int pfx_prefixlen; int pfx_origin; /* From kernel or config */ struct in6_addr pfx_prefix; }; struct rtinfo { TAILQ_ENTRY(rtinfo) rti_next; uint32_t rti_ltime; /* route lifetime */ int rti_rtpref; /* route preference */ int rti_prefixlen; struct in6_addr rti_prefix; }; struct rdnss_addr { TAILQ_ENTRY(rdnss_addr) ra_next; struct in6_addr ra_dns; /* DNS server entry */ }; struct rdnss { TAILQ_ENTRY(rdnss) rd_next; TAILQ_HEAD(, rdnss_addr) rd_list; /* list of DNS servers */ uint32_t rd_ltime; /* number of seconds valid */ }; struct pref64 { TAILQ_ENTRY(pref64) p64_next; bool p64_enabled; uint16_t p64_plc; /* prefix length code */ uint16_t p64_sl; /* scaled lifetime */ struct in6_addr p64_prefix; }; /* * The maximum length of a domain name in a DNS search list is calculated * by a domain name + length fields per 63 octets + a zero octet at * the tail and adding 8 octet boundary padding. */ #define _DNAME_LABELENC_MAXLEN \ (NI_MAXHOST + (NI_MAXHOST / 64 + 1) + 1) #define DNAME_LABELENC_MAXLEN \ (_DNAME_LABELENC_MAXLEN + 8 - _DNAME_LABELENC_MAXLEN % 8) struct dnssl_addr { TAILQ_ENTRY(dnssl_addr) da_next; int da_len; /* length of entry */ char da_dom[DNAME_LABELENC_MAXLEN]; /* search domain name entry */ }; struct dnssl { TAILQ_ENTRY(dnssl) dn_next; TAILQ_HEAD(, dnssl_addr) dn_list; /* list of search domains */ uint32_t dn_ltime; /* number of seconds valid */ }; struct soliciter { TAILQ_ENTRY(soliciter) sol_next; struct sockaddr_in6 sol_addr; }; struct rainfo { /* pointer for list */ TAILQ_ENTRY(rainfo) rai_next; /* interface information */ struct ifinfo *rai_ifinfo; int rai_advlinkopt; /* bool: whether include link-layer addr opt */ int rai_advifprefix; /* bool: gather IF prefixes? */ /* Router configuration variables */ uint16_t rai_lifetime; /* AdvDefaultLifetime */ uint16_t rai_maxinterval; /* MaxRtrAdvInterval */ uint16_t rai_mininterval; /* MinRtrAdvInterval */ int rai_managedflg; /* AdvManagedFlag */ int rai_otherflg; /* AdvOtherConfigFlag */ #ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG int rai_ipv6onlyflg; /* AdvIPv6OnlyFlag */ #endif int rai_rtpref; /* router preference */ uint32_t rai_linkmtu; /* AdvLinkMTU */ uint32_t rai_reachabletime; /* AdvReachableTime */ uint32_t rai_retranstimer; /* AdvRetransTimer */ uint8_t rai_hoplimit; /* AdvCurHopLimit */ TAILQ_HEAD(, prefix) rai_prefix;/* AdvPrefixList(link head) */ int rai_pfxs; /* number of prefixes */ uint16_t rai_clockskew; /* used for consisitency check of lifetimes */ TAILQ_HEAD(, rdnss) rai_rdnss; /* DNS server list */ TAILQ_HEAD(, dnssl) rai_dnssl; /* search domain list */ TAILQ_HEAD(, rtinfo) rai_route; /* route information option (link head) */ int rai_routes; /* number of route information options */ /* actual RA packet data and its length */ size_t rai_ra_datalen; char *rai_ra_data; struct pref64 rai_pref64; /* PREF64 option */ /* info about soliciter */ TAILQ_HEAD(, soliciter) rai_soliciter; /* recent solication source */ }; /* RA information list */ extern TAILQ_HEAD(railist_head_t, rainfo) railist; /* * ifi_state: * * (INIT) * | * | update_ifinfo() * | update_persist_ifinfo() * v * UNCONFIGURED * | ^ * loadconfig()| |rm_ifinfo(), ra_output() * (MC join)| |(MC leave) * | | * | | * v | * TRANSITIVE * | ^ * ra_output()| |getconfig() * | | * | | * | | * v | * CONFIGURED * * */ #define IFI_STATE_UNCONFIGURED 0 #define IFI_STATE_CONFIGURED 1 #define IFI_STATE_TRANSITIVE 2 struct ifinfo { TAILQ_ENTRY(ifinfo) ifi_next; uint16_t ifi_state; uint16_t ifi_persist; uint16_t ifi_ifindex; char ifi_ifname[IFNAMSIZ]; uint8_t ifi_type; uint16_t ifi_flags; uint32_t ifi_nd_flags; uint32_t ifi_phymtu; struct sockaddr_dl ifi_sdl; struct rainfo *ifi_rainfo; struct rainfo *ifi_rainfo_trans; uint16_t ifi_burstcount; uint32_t ifi_burstinterval; struct rtadvd_timer *ifi_ra_timer; /* timestamp when the latest RA was sent */ struct timespec ifi_ra_lastsent; uint16_t ifi_rs_waitcount; /* statistics */ uint64_t ifi_raoutput; /* # of RAs sent */ uint64_t ifi_rainput; /* # of RAs received */ uint64_t ifi_rainconsistent; /* # of inconsistent recv'd RAs */ uint64_t ifi_rsinput; /* # of RSs received */ }; /* Interface list */ extern TAILQ_HEAD(ifilist_head_t, ifinfo) ifilist; extern char *mcastif; struct rtadvd_timer *ra_timeout(void *); void ra_timer_update(void *, struct timespec *); void ra_output(struct ifinfo *); int prefix_match(struct in6_addr *, int, struct in6_addr *, int); struct ifinfo *if_indextoifinfo(int); struct prefix *find_prefix(struct rainfo *, struct in6_addr *, int); void rtadvd_set_reload(int); void rtadvd_set_shutdown(int);