Adding upstream version 8.4.4.upstream/8.4.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 451 insertions, 0 deletions

diff --git a/zebra/rtadv.h b/zebra/rtadv.h
new file mode 100644
index 0000000..26c7823
--- /dev/null
+++ b/zebra/rtadv.h
@@ -0,0 +1,451 @@
+/* Router advertisement
+ * Copyright (C) 2005 6WIND <jean-mickael.guerin@6wind.com>
+ * Copyright (C) 1999 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _ZEBRA_RTADV_H
+#define _ZEBRA_RTADV_H
+
+#include "zebra.h"
+#include "vty.h"
+#include "typesafe.h"
+
+#include "zebra/zserv.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct interface;
+struct zebra_if;
+
+#if defined(HAVE_RTADV)
+
+PREDECL_SORTLIST_UNIQ(adv_if_list);
+/* Structure which hold status of router advertisement. */
+struct rtadv {
+	int sock;
+
+	struct adv_if_list_head adv_if;
+	struct adv_if_list_head adv_msec_if;
+
+	struct thread *ra_read;
+	struct thread *ra_timer;
+};
+
+PREDECL_RBTREE_UNIQ(rtadv_prefixes);
+
+/* Router advertisement parameter.  From RFC4861, RFC6275 and RFC4191. */
+struct rtadvconf {
+	/* A flag indicating whether or not the router sends periodic Router
+	   Advertisements and responds to Router Solicitations.
+	   Default: false */
+	int AdvSendAdvertisements;
+
+	/* The maximum time allowed between sending unsolicited multicast
+	   Router Advertisements from the interface, in milliseconds.
+	   MUST be no less than 70 ms [RFC6275 7.5] and no greater
+	   than 1800000 ms [RFC4861 6.2.1].
+
+	   Default: 600000 milliseconds */
+	int MaxRtrAdvInterval;
+#define RTADV_MAX_RTR_ADV_INTERVAL 600000
+
+	/* The minimum time allowed between sending unsolicited multicast
+	   Router Advertisements from the interface, in milliseconds.
+	   MUST be no less than 30 ms [RFC6275 7.5].
+	   MUST be no greater than .75 * MaxRtrAdvInterval.
+
+	   Default: 0.33 * MaxRtrAdvInterval */
+	int MinRtrAdvInterval; /* This field is currently unused. */
+#define RTADV_MIN_RTR_ADV_INTERVAL (0.33 * RTADV_MAX_RTR_ADV_INTERVAL)
+
+	/* Unsolicited Router Advertisements' interval timer. */
+	int AdvIntervalTimer;
+
+	/* The true/false value to be placed in the "Managed address
+	   configuration" flag field in the Router Advertisement.  See
+	   [ADDRCONF].
+
+	   Default: false */
+	int AdvManagedFlag;
+	struct timeval lastadvmanagedflag;
+
+
+	/* The true/false value to be placed in the "Other stateful
+	   configuration" flag field in the Router Advertisement.  See
+	   [ADDRCONF].
+
+	   Default: false */
+	int AdvOtherConfigFlag;
+	struct timeval lastadvotherconfigflag;
+
+	/* The value to be placed in MTU options sent by the router.  A
+	   value of zero indicates that no MTU options are sent.
+
+	   Default: 0 */
+	int AdvLinkMTU;
+
+
+	/* The value to be placed in the Reachable Time field in the Router
+	   Advertisement messages sent by the router.  The value zero means
+	   unspecified (by this router).  MUST be no greater than 3,600,000
+	   milliseconds (1 hour).
+
+	   Default: 0 */
+	uint32_t AdvReachableTime;
+#define RTADV_MAX_REACHABLE_TIME 3600000
+	struct timeval lastadvreachabletime;
+
+	/* The value to be placed in the Retrans Timer field in the Router
+	   Advertisement messages sent by the router.  The value zero means
+	   unspecified (by this router).
+
+	   Default: 0 */
+	int AdvRetransTimer;
+	struct timeval lastadvretranstimer;
+
+	/* The default value to be placed in the Cur Hop Limit field in the
+	   Router Advertisement messages sent by the router.  The value
+	   should be set to that current diameter of the Internet.  The
+	   value zero means unspecified (by this router).
+
+	   Default: The value specified in the "Assigned Numbers" RFC
+	   [ASSIGNED] that was in effect at the time of implementation. */
+	int AdvCurHopLimit;
+	struct timeval lastadvcurhoplimit;
+
+#define RTADV_DEFAULT_HOPLIMIT 64 /* 64 hops */
+
+	/* The value to be placed in the Router Lifetime field of Router
+	   Advertisements sent from the interface, in seconds.  MUST be
+	   either zero or between MaxRtrAdvInterval and 9000 seconds.  A
+	   value of zero indicates that the router is not to be used as a
+	   default router.
+
+	   Default: 3 * MaxRtrAdvInterval */
+	int AdvDefaultLifetime;
+#define RTADV_MAX_RTRLIFETIME 9000 /* 2.5 hours */
+
+	/* A list of prefixes to be placed in Prefix Information options in
+	   Router Advertisement messages sent from the interface.
+
+	   Default: all prefixes that the router advertises via routing
+	   protocols as being on-link for the interface from which the
+	   advertisement is sent. The link-local prefix SHOULD NOT be
+	   included in the list of advertised prefixes. */
+	struct rtadv_prefixes_head prefixes[1];
+
+	/* The true/false value to be placed in the "Home agent"
+	   flag field in the Router Advertisement.  See [RFC6275 7.1].
+
+	   Default: false */
+	int AdvHomeAgentFlag;
+#ifndef ND_RA_FLAG_HOME_AGENT
+#define ND_RA_FLAG_HOME_AGENT 0x20
+#endif
+
+	/* The value to be placed in Home Agent Information option if Home
+	   Flag is set.
+	   Default: 0 */
+	int HomeAgentPreference;
+
+	/* The value to be placed in Home Agent Information option if Home
+	   Flag is set. Lifetime (seconds) MUST not be greater than 18.2
+	   hours.
+	   The value 0 has special meaning: use of AdvDefaultLifetime value.
+
+	   Default: 0 */
+	int HomeAgentLifetime;
+#define RTADV_MAX_HALIFETIME 65520 /* 18.2 hours */
+
+	/* The true/false value to insert or not an Advertisement Interval
+	   option. See [RFC 6275 7.3]
+
+	   Default: false */
+	int AdvIntervalOption;
+
+	/* The value to be placed in the Default Router Preference field of
+	   a router advertisement. See [RFC 4191 2.1 & 2.2]
+
+	   Default: 0 (medium) */
+	int DefaultPreference;
+#define RTADV_PREF_MEDIUM 0x0 /* Per RFC4191. */
+
+	/*
+	 * List of recursive DNS servers to include in the RDNSS option.
+	 * See [RFC8106 5.1]
+	 *
+	 * Default: empty list; do not emit RDNSS option
+	 */
+	struct list *AdvRDNSSList;
+
+	/*
+	 * List of DNS search domains to include in the DNSSL option.
+	 * See [RFC8106 5.2]
+	 *
+	 * Default: empty list; do not emit DNSSL option
+	 */
+	struct list *AdvDNSSLList;
+
+	/*
+	 * rfc4861 states RAs must be sent at least 3 seconds apart.
+	 * We allow faster retransmits to speed up convergence but can
+	 * turn that capability off to meet the rfc if needed.
+	 */
+	bool UseFastRexmit; /* True if fast rexmits are enabled */
+
+	uint8_t inFastRexmit; /* True if we're rexmits faster than usual */
+
+	/* Track if RA was configured by BGP or by the Operator or both */
+	uint8_t ra_configured;	   /* Was RA configured? */
+#define BGP_RA_CONFIGURED (1 << 0) /* BGP configured RA? */
+#define VTY_RA_CONFIGURED (1 << 1) /* Operator configured RA? */
+#define VTY_RA_INTERVAL_CONFIGURED                                             \
+	(1 << 2)		  /* Operator configured RA interval */
+	int NumFastReXmitsRemain; /* Loaded first with number of fast
+				     rexmits to do */
+
+#define RTADV_FAST_REXMIT_PERIOD 1 /* 1 sec */
+#define RTADV_NUM_FAST_REXMITS 4   /* Fast Rexmit RA 4 times on certain events \
+				    */
+};
+
+struct rtadv_rdnss {
+	/* Address of recursive DNS server to advertise */
+	struct in6_addr addr;
+
+	/*
+	 * Lifetime in seconds; all-ones means infinity, zero
+	 * stop using it.
+	 */
+	uint32_t lifetime;
+
+	/* If lifetime not set, use a default of 3*MaxRtrAdvInterval */
+	int lifetime_set;
+};
+
+/*
+ * [RFC1035 2.3.4] sets the maximum length of a domain name (a sequence of
+ * labels, each prefixed by a length octet) at 255 octets.
+ */
+#define RTADV_MAX_ENCODED_DOMAIN_NAME 255
+
+struct rtadv_dnssl {
+	/* Domain name without trailing root zone dot (NUL-terminated) */
+	char name[RTADV_MAX_ENCODED_DOMAIN_NAME - 1];
+
+	/* Name encoded as in [RFC1035 3.1] */
+	uint8_t encoded_name[RTADV_MAX_ENCODED_DOMAIN_NAME];
+
+	/* Actual length of encoded_name */
+	size_t encoded_len;
+
+	/* Lifetime as for RDNSS */
+	uint32_t lifetime;
+	int lifetime_set;
+};
+
+/* Router advertisement prefix. */
+struct rtadv_prefix {
+	struct rtadv_prefixes_item item;
+
+	/* Prefix to be advertised. */
+	struct prefix_ipv6 prefix;
+
+	/* The prefix was manually/automatically defined. */
+	int AdvPrefixCreate;
+
+	/* The value to be placed in the Valid Lifetime in the Prefix */
+	uint32_t AdvValidLifetime;
+#define RTADV_VALID_LIFETIME 2592000
+
+	/* The value to be placed in the on-link flag */
+	int AdvOnLinkFlag;
+
+	/* The value to be placed in the Preferred Lifetime in the Prefix
+	   Information option, in seconds.*/
+	uint32_t AdvPreferredLifetime;
+#define RTADV_PREFERRED_LIFETIME 604800
+
+	/* The value to be placed in the Autonomous Flag. */
+	int AdvAutonomousFlag;
+
+	/* The value to be placed in the Router Address Flag [RFC6275 7.2]. */
+	int AdvRouterAddressFlag;
+#ifndef ND_OPT_PI_FLAG_RADDR
+#define ND_OPT_PI_FLAG_RADDR         0x20
+#endif
+};
+
+/* RFC4861 minimum delay between RAs  */
+#ifndef MIN_DELAY_BETWEEN_RAS
+#define MIN_DELAY_BETWEEN_RAS        3000
+#endif
+
+/* RFC4584 Extension to Sockets API for Mobile IPv6 */
+
+#ifndef ND_OPT_ADV_INTERVAL
+#define ND_OPT_ADV_INTERVAL	7   /* Adv Interval Option */
+#endif
+#ifndef ND_OPT_HA_INFORMATION
+#define ND_OPT_HA_INFORMATION	8   /* HA Information Option */
+#endif
+
+#ifndef HAVE_STRUCT_ND_OPT_ADV_INTERVAL
+struct nd_opt_adv_interval { /* Advertisement interval option */
+	uint8_t nd_opt_ai_type;
+	uint8_t nd_opt_ai_len;
+	uint16_t nd_opt_ai_reserved;
+	uint32_t nd_opt_ai_interval;
+} __attribute__((__packed__));
+#else
+#ifndef HAVE_STRUCT_ND_OPT_ADV_INTERVAL_ND_OPT_AI_TYPE
+/* fields may have to be renamed */
+#define nd_opt_ai_type		nd_opt_adv_interval_type
+#define nd_opt_ai_len		nd_opt_adv_interval_len
+#define nd_opt_ai_reserved	nd_opt_adv_interval_reserved
+#define nd_opt_ai_interval	nd_opt_adv_interval_ival
+#endif
+#endif
+
+#ifndef HAVE_STRUCT_ND_OPT_HOMEAGENT_INFO
+struct nd_opt_homeagent_info { /* Home Agent info */
+	uint8_t nd_opt_hai_type;
+	uint8_t nd_opt_hai_len;
+	uint16_t nd_opt_hai_reserved;
+	uint16_t nd_opt_hai_preference;
+	uint16_t nd_opt_hai_lifetime;
+} __attribute__((__packed__));
+#endif
+
+#ifndef ND_OPT_RDNSS
+#define ND_OPT_RDNSS 25
+#endif
+#ifndef ND_OPT_DNSSL
+#define ND_OPT_DNSSL 31
+#endif
+
+#ifndef HAVE_STRUCT_ND_OPT_RDNSS
+struct nd_opt_rdnss { /* Recursive DNS server option [RFC8106 5.1] */
+	uint8_t nd_opt_rdnss_type;
+	uint8_t nd_opt_rdnss_len;
+	uint16_t nd_opt_rdnss_reserved;
+	uint32_t nd_opt_rdnss_lifetime;
+	/* Followed by one or more IPv6 addresses */
+} __attribute__((__packed__));
+#endif
+
+#ifndef HAVE_STRUCT_ND_OPT_DNSSL
+struct nd_opt_dnssl { /* DNS search list option [RFC8106 5.2] */
+	uint8_t nd_opt_dnssl_type;
+	uint8_t nd_opt_dnssl_len;
+	uint16_t nd_opt_dnssl_reserved;
+	uint32_t nd_opt_dnssl_lifetime;
+	/*
+	 * Followed by one or more domain names encoded as in [RFC1035 3.1].
+	 * Multiple domain names are concatenated after encoding. In any case,
+	 * the result is zero-padded to a multiple of 8 octets.
+	 */
+} __attribute__((__packed__));
+#endif
+
+/*
+ * ipv6 nd prefixes can be manually defined, derived from the kernel interface
+ * configs or both.  If both, manual flag/timer settings are used.
+ */
+enum ipv6_nd_prefix_source {
+	PREFIX_SRC_NONE = 0,
+	PREFIX_SRC_MANUAL,
+	PREFIX_SRC_AUTO,
+	PREFIX_SRC_BOTH,
+};
+
+enum ipv6_nd_suppress_ra_status {
+	RA_ENABLE = 0,
+	RA_SUPPRESS,
+};
+
+extern void rtadv_vrf_init(struct zebra_vrf *zvrf);
+extern void rtadv_vrf_terminate(struct zebra_vrf *zvrf);
+extern void rtadv_stop_ra(struct interface *ifp);
+extern void rtadv_stop_ra_all(void);
+extern void rtadv_cmd_init(void);
+extern void rtadv_if_init(struct zebra_if *zif);
+extern void rtadv_if_up(struct zebra_if *zif);
+extern void rtadv_if_fini(struct zebra_if *zif);
+extern void rtadv_add_prefix(struct zebra_if *zif, const struct prefix_ipv6 *p);
+extern void rtadv_delete_prefix(struct zebra_if *zif, const struct prefix *p);
+
+#else /* !HAVE_RTADV */
+struct rtadv {
+	/* empty structs aren't valid ISO C */
+	char dummy;
+};
+
+struct rtadvconf {
+	/* same again, empty structs aren't valid ISO C */
+	char dummy;
+};
+
+static inline void rtadv_vrf_init(struct zebra_vrf *zvrf)
+{
+}
+static inline void rtadv_vrf_terminate(struct zebra_vrf *zvrf)
+{
+}
+static inline void rtadv_cmd_init(void)
+{
+}
+static inline void rtadv_if_init(struct zebra_if *zif)
+{
+}
+static inline void rtadv_if_up(struct zebra_if *zif)
+{
+}
+static inline void rtadv_if_fini(struct zebra_if *zif)
+{
+}
+static inline void rtadv_add_prefix(struct zebra_if *zif,
+				    const struct prefix_ipv6 *p)
+{
+}
+static inline void rtadv_delete_prefix(struct zebra_if *zif,
+				       const struct prefix *p)
+{
+}
+static inline void rtadv_stop_ra(struct interface *ifp)
+{
+}
+static inline void rtadv_stop_ra_all(void)
+{
+}
+#endif
+
+extern void zebra_interface_radv_disable(ZAPI_HANDLER_ARGS);
+extern void zebra_interface_radv_enable(ZAPI_HANDLER_ARGS);
+
+extern uint32_t rtadv_get_interfaces_configured_from_bgp(void);
+extern bool rtadv_compiled_in(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZEBRA_RTADV_H */