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8fcacf6803
The adata variable was being leaked on shutdown since it was calloc'ed. There is no need to make this dynamic memory. Just choose a size and use that. Add a bit of code to ensure that if it's not large enough, it will just stop and the developer will fix it. Signed-off-by: Donald Sharp <sharpd@nvidia.com>
445 lines
12 KiB
C
445 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Router advertisement
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* Copyright (C) 2005 6WIND <jean-mickael.guerin@6wind.com>
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* Copyright (C) 1999 Kunihiro Ishiguro
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*/
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#ifndef _ZEBRA_RTADV_H
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#define _ZEBRA_RTADV_H
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#include "zebra.h"
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#include "vty.h"
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#include "typesafe.h"
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#include "zebra/zserv.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct interface;
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struct zebra_if;
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#if defined(HAVE_RTADV)
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PREDECL_SORTLIST_UNIQ(adv_if_list);
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/* Structure which hold status of router advertisement. */
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struct rtadv {
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int sock;
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struct adv_if_list_head adv_if;
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struct adv_if_list_head adv_msec_if;
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struct event *ra_read;
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struct event *ra_timer;
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};
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PREDECL_RBTREE_UNIQ(rtadv_prefixes);
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/* Router advertisement parameter. From RFC4861, RFC6275 and RFC4191. */
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struct rtadvconf {
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/* A flag indicating whether or not the router sends periodic Router
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Advertisements and responds to Router Solicitations.
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Default: false */
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int AdvSendAdvertisements;
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/* The maximum time allowed between sending unsolicited multicast
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Router Advertisements from the interface, in milliseconds.
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MUST be no less than 70 ms [RFC6275 7.5] and no greater
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than 1800000 ms [RFC4861 6.2.1].
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Default: 600000 milliseconds */
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int MaxRtrAdvInterval;
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#define RTADV_MAX_RTR_ADV_INTERVAL 600000
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/* The minimum time allowed between sending unsolicited multicast
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Router Advertisements from the interface, in milliseconds.
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MUST be no less than 30 ms [RFC6275 7.5].
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MUST be no greater than .75 * MaxRtrAdvInterval.
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Default: 0.33 * MaxRtrAdvInterval */
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int MinRtrAdvInterval; /* This field is currently unused. */
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#define RTADV_MIN_RTR_ADV_INTERVAL (0.33 * RTADV_MAX_RTR_ADV_INTERVAL)
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/* Unsolicited Router Advertisements' interval timer. */
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int AdvIntervalTimer;
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/* The true/false value to be placed in the "Managed address
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configuration" flag field in the Router Advertisement. See
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[ADDRCONF].
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Default: false */
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int AdvManagedFlag;
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struct timeval lastadvmanagedflag;
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/* The true/false value to be placed in the "Other stateful
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configuration" flag field in the Router Advertisement. See
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[ADDRCONF].
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Default: false */
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int AdvOtherConfigFlag;
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struct timeval lastadvotherconfigflag;
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/* The value to be placed in MTU options sent by the router. A
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value of zero indicates that no MTU options are sent.
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Default: 0 */
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int AdvLinkMTU;
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/* The value to be placed in the Reachable Time field in the Router
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Advertisement messages sent by the router. The value zero means
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unspecified (by this router). MUST be no greater than 3,600,000
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milliseconds (1 hour).
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Default: 0 */
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uint32_t AdvReachableTime;
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#define RTADV_MAX_REACHABLE_TIME 3600000
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struct timeval lastadvreachabletime;
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/* The value to be placed in the Retrans Timer field in the Router
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Advertisement messages sent by the router. The value zero means
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unspecified (by this router).
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Default: 0 */
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int AdvRetransTimer;
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struct timeval lastadvretranstimer;
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/* The default value to be placed in the Cur Hop Limit field in the
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Router Advertisement messages sent by the router. The value
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should be set to that current diameter of the Internet. The
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value zero means unspecified (by this router).
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Default: The value specified in the "Assigned Numbers" RFC
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[ASSIGNED] that was in effect at the time of implementation. */
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int AdvCurHopLimit;
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struct timeval lastadvcurhoplimit;
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#define RTADV_DEFAULT_HOPLIMIT 64 /* 64 hops */
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/* The value to be placed in the Router Lifetime field of Router
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Advertisements sent from the interface, in seconds. MUST be
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either zero or between MaxRtrAdvInterval and 9000 seconds. A
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value of zero indicates that the router is not to be used as a
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default router.
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Default: 3 * MaxRtrAdvInterval */
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int AdvDefaultLifetime;
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#define RTADV_MAX_RTRLIFETIME 9000 /* 2.5 hours */
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/* A list of prefixes to be placed in Prefix Information options in
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Router Advertisement messages sent from the interface.
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Default: all prefixes that the router advertises via routing
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protocols as being on-link for the interface from which the
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advertisement is sent. The link-local prefix SHOULD NOT be
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included in the list of advertised prefixes. */
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struct rtadv_prefixes_head prefixes[1];
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/* The true/false value to be placed in the "Home agent"
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flag field in the Router Advertisement. See [RFC6275 7.1].
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Default: false */
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int AdvHomeAgentFlag;
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#ifndef ND_RA_FLAG_HOME_AGENT
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#define ND_RA_FLAG_HOME_AGENT 0x20
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#endif
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/* The value to be placed in Home Agent Information option if Home
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Flag is set.
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Default: 0 */
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int HomeAgentPreference;
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/* The value to be placed in Home Agent Information option if Home
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Flag is set. Lifetime (seconds) MUST not be greater than 18.2
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hours.
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The value 0 has special meaning: use of AdvDefaultLifetime value.
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Default: 0 */
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int HomeAgentLifetime;
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#define RTADV_MAX_HALIFETIME 65520 /* 18.2 hours */
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/* The true/false value to insert or not an Advertisement Interval
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option. See [RFC 6275 7.3]
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Default: false */
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int AdvIntervalOption;
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/* The value to be placed in the Default Router Preference field of
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a router advertisement. See [RFC 4191 2.1 & 2.2]
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Default: 0 (medium) */
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int DefaultPreference;
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#define RTADV_PREF_MEDIUM 0x0 /* Per RFC4191. */
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/*
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* List of recursive DNS servers to include in the RDNSS option.
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* See [RFC8106 5.1]
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*
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* Default: empty list; do not emit RDNSS option
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*/
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struct list *AdvRDNSSList;
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/*
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* List of DNS search domains to include in the DNSSL option.
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* See [RFC8106 5.2]
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*
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* Default: empty list; do not emit DNSSL option
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*/
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struct list *AdvDNSSLList;
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/*
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* rfc4861 states RAs must be sent at least 3 seconds apart.
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* We allow faster retransmits to speed up convergence but can
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* turn that capability off to meet the rfc if needed.
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*/
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bool UseFastRexmit; /* True if fast rexmits are enabled */
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uint8_t inFastRexmit; /* True if we're rexmits faster than usual */
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/* Track if RA was configured by BGP or by the Operator or both */
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uint8_t ra_configured; /* Was RA configured? */
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#define BGP_RA_CONFIGURED (1 << 0) /* BGP configured RA? */
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#define VTY_RA_CONFIGURED (1 << 1) /* Operator configured RA? */
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#define VTY_RA_INTERVAL_CONFIGURED \
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(1 << 2) /* Operator configured RA interval */
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int NumFastReXmitsRemain; /* Loaded first with number of fast
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rexmits to do */
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#define RTADV_FAST_REXMIT_PERIOD 1 /* 1 sec */
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#define RTADV_NUM_FAST_REXMITS 4 /* Fast Rexmit RA 4 times on certain events \
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*/
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};
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struct rtadv_rdnss {
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/* Address of recursive DNS server to advertise */
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struct in6_addr addr;
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/*
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* Lifetime in seconds; all-ones means infinity, zero
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* stop using it.
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*/
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uint32_t lifetime;
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/* If lifetime not set, use a default of 3*MaxRtrAdvInterval */
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int lifetime_set;
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};
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/*
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* [RFC1035 2.3.4] sets the maximum length of a domain name (a sequence of
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* labels, each prefixed by a length octet) at 255 octets.
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*/
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#define RTADV_MAX_ENCODED_DOMAIN_NAME 255
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struct rtadv_dnssl {
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/* Domain name without trailing root zone dot (NUL-terminated) */
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char name[RTADV_MAX_ENCODED_DOMAIN_NAME - 1];
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/* Name encoded as in [RFC1035 3.1] */
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uint8_t encoded_name[RTADV_MAX_ENCODED_DOMAIN_NAME];
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/* Actual length of encoded_name */
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size_t encoded_len;
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/* Lifetime as for RDNSS */
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uint32_t lifetime;
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int lifetime_set;
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};
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/* Router advertisement prefix. */
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struct rtadv_prefix {
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struct rtadv_prefixes_item item;
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/* Prefix to be advertised. */
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struct prefix_ipv6 prefix;
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/* The prefix was manually/automatically defined. */
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int AdvPrefixCreate;
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/* The value to be placed in the Valid Lifetime in the Prefix */
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uint32_t AdvValidLifetime;
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#define RTADV_VALID_LIFETIME 2592000
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/* The value to be placed in the on-link flag */
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int AdvOnLinkFlag;
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/* The value to be placed in the Preferred Lifetime in the Prefix
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Information option, in seconds.*/
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uint32_t AdvPreferredLifetime;
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#define RTADV_PREFERRED_LIFETIME 604800
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/* The value to be placed in the Autonomous Flag. */
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int AdvAutonomousFlag;
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/* The value to be placed in the Router Address Flag [RFC6275 7.2]. */
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int AdvRouterAddressFlag;
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#ifndef ND_OPT_PI_FLAG_RADDR
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#define ND_OPT_PI_FLAG_RADDR 0x20
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#endif
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};
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/* RFC4861 minimum delay between RAs */
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#ifndef MIN_DELAY_BETWEEN_RAS
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#define MIN_DELAY_BETWEEN_RAS 3000
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#endif
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/* RFC4584 Extension to Sockets API for Mobile IPv6 */
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#ifndef ND_OPT_ADV_INTERVAL
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#define ND_OPT_ADV_INTERVAL 7 /* Adv Interval Option */
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#endif
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#ifndef ND_OPT_HA_INFORMATION
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#define ND_OPT_HA_INFORMATION 8 /* HA Information Option */
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#endif
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#ifndef HAVE_STRUCT_ND_OPT_ADV_INTERVAL
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struct nd_opt_adv_interval { /* Advertisement interval option */
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uint8_t nd_opt_ai_type;
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uint8_t nd_opt_ai_len;
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uint16_t nd_opt_ai_reserved;
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uint32_t nd_opt_ai_interval;
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} __attribute__((__packed__));
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#else
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#ifndef HAVE_STRUCT_ND_OPT_ADV_INTERVAL_ND_OPT_AI_TYPE
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/* fields may have to be renamed */
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#define nd_opt_ai_type nd_opt_adv_interval_type
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#define nd_opt_ai_len nd_opt_adv_interval_len
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#define nd_opt_ai_reserved nd_opt_adv_interval_reserved
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#define nd_opt_ai_interval nd_opt_adv_interval_ival
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#endif
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#endif
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#ifndef ND_OPT_RTR_ADV_INTERVAL
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#define ND_OPT_RTR_ADV_INTERVAL 7
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#endif
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#ifndef ND_OPT_HOME_AGENT_INFO
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#define ND_OPT_HOME_AGENT_INFO 8
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#endif
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#ifndef HAVE_STRUCT_ND_OPT_HOMEAGENT_INFO
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struct nd_opt_homeagent_info { /* Home Agent info */
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uint8_t nd_opt_hai_type;
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uint8_t nd_opt_hai_len;
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uint16_t nd_opt_hai_reserved;
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uint16_t nd_opt_hai_preference;
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uint16_t nd_opt_hai_lifetime;
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} __attribute__((__packed__));
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#endif
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#ifndef ND_OPT_RDNSS
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#define ND_OPT_RDNSS 25
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#endif
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#ifndef ND_OPT_DNSSL
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#define ND_OPT_DNSSL 31
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#endif
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#ifndef HAVE_STRUCT_ND_OPT_RDNSS
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struct nd_opt_rdnss { /* Recursive DNS server option [RFC8106 5.1] */
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uint8_t nd_opt_rdnss_type;
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uint8_t nd_opt_rdnss_len;
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uint16_t nd_opt_rdnss_reserved;
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uint32_t nd_opt_rdnss_lifetime;
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/* Followed by one or more IPv6 addresses */
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} __attribute__((__packed__));
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#endif
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#ifndef HAVE_STRUCT_ND_OPT_DNSSL
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struct nd_opt_dnssl { /* DNS search list option [RFC8106 5.2] */
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uint8_t nd_opt_dnssl_type;
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uint8_t nd_opt_dnssl_len;
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uint16_t nd_opt_dnssl_reserved;
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uint32_t nd_opt_dnssl_lifetime;
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/*
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* Followed by one or more domain names encoded as in [RFC1035 3.1].
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* Multiple domain names are concatenated after encoding. In any case,
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* the result is zero-padded to a multiple of 8 octets.
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*/
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} __attribute__((__packed__));
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#endif
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/*
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* ipv6 nd prefixes can be manually defined, derived from the kernel interface
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* configs or both. If both, manual flag/timer settings are used.
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*/
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enum ipv6_nd_prefix_source {
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PREFIX_SRC_NONE = 0,
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PREFIX_SRC_MANUAL,
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PREFIX_SRC_AUTO,
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PREFIX_SRC_BOTH,
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};
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enum ipv6_nd_suppress_ra_status {
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RA_ENABLE = 0,
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RA_SUPPRESS,
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};
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extern void rtadv_vrf_init(struct zebra_vrf *zvrf);
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extern void rtadv_vrf_terminate(struct zebra_vrf *zvrf);
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extern void rtadv_stop_ra(struct interface *ifp);
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extern void rtadv_stop_ra_all(void);
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extern void rtadv_cmd_init(void);
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extern void rtadv_if_init(struct zebra_if *zif);
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extern void rtadv_if_up(struct zebra_if *zif);
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extern void rtadv_if_fini(struct zebra_if *zif);
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extern void rtadv_add_prefix(struct zebra_if *zif, const struct prefix_ipv6 *p);
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extern void rtadv_delete_prefix(struct zebra_if *zif, const struct prefix *p);
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#else /* !HAVE_RTADV */
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struct rtadv {
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/* empty structs aren't valid ISO C */
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char dummy;
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};
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struct rtadvconf {
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/* same again, empty structs aren't valid ISO C */
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char dummy;
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};
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static inline void rtadv_vrf_init(struct zebra_vrf *zvrf)
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{
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}
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static inline void rtadv_vrf_terminate(struct zebra_vrf *zvrf)
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{
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}
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static inline void rtadv_cmd_init(void)
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{
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}
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static inline void rtadv_if_init(struct zebra_if *zif)
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{
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}
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static inline void rtadv_if_up(struct zebra_if *zif)
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{
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}
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static inline void rtadv_if_fini(struct zebra_if *zif)
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{
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}
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static inline void rtadv_add_prefix(struct zebra_if *zif,
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const struct prefix_ipv6 *p)
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{
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}
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static inline void rtadv_delete_prefix(struct zebra_if *zif,
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const struct prefix *p)
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{
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}
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static inline void rtadv_stop_ra(struct interface *ifp)
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{
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}
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static inline void rtadv_stop_ra_all(void)
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{
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}
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#endif
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extern void zebra_interface_radv_disable(ZAPI_HANDLER_ARGS);
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extern void zebra_interface_radv_enable(ZAPI_HANDLER_ARGS);
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extern uint32_t rtadv_get_interfaces_configured_from_bgp(void);
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extern bool rtadv_compiled_in(void);
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extern void rtadv_init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ZEBRA_RTADV_H */
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