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bird/proto/ospf/ospf.h
Ondrej Zajicek 8df02847e8 Fixes a compatibility issue in OSPFv2 PtP links. 
BIRD used zero netmask in hello packets on all PtP links, not just on
unnumbered ones. This patch fixes it and adds option 'ptp netmask'
for overriding the default behavior.

Thanks to Alexander V. Chernikov for the original patch.
2013-04-17 13:06:40 +02:00

887 lines
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/*
* BIRD -- OSPF
*
* (c) 1999--2005 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_OSPF_H_
#define _BIRD_OSPF_H_
#define MAXNETS 10
#define OSPF_MAX_PKT_SIZE 65535
/*
* RFC 2328 says, maximum packet size is 65535 (IP packet size
* limit). Really a bit less for OSPF, because this contains also IP
* header. This could be too much for small systems, so I normally
* allocate 2*mtu (i found one cisco sending packets mtu+16). OSPF
* packets are almost always sent small enough to not be fragmented.
*/
#ifdef LOCAL_DEBUG
#define OSPF_FORCE_DEBUG 1
#else
#define OSPF_FORCE_DEBUG 0
#endif
#define OSPF_TRACE(flags, msg, args...) do { if ((p->debug & flags) || OSPF_FORCE_DEBUG) \
log(L_TRACE "%s: " msg, p->name , ## args ); } while(0)
#define OSPF_PACKET(dumpfn, buffer, msg, args...) \
do { if ((p->debug & D_PACKETS) || OSPF_FORCE_DEBUG) \
{ log(L_TRACE "%s: " msg, p->name, ## args ); dumpfn(p, buffer); } } while(0)
#include "nest/bird.h"
#include "lib/checksum.h"
#include "lib/ip.h"
#include "lib/lists.h"
#include "lib/slists.h"
#include "lib/socket.h"
#include "lib/timer.h"
#include "lib/resource.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "nest/route.h"
#include "nest/cli.h"
#include "nest/locks.h"
#include "conf/conf.h"
#include "lib/string.h"
#define OSPF_PROTO 89
#ifndef IPV6
#define OSPFv2 1
#define OSPF_VERSION 2
#define OSPF_VLINK_MTU 576 /* RFC 2328 A.1 */
#define AllSPFRouters ipa_from_u32(0xe0000005) /* 224.0.0.5 */
#define AllDRouters ipa_from_u32(0xe0000006) /* 224.0.0.6 */
#else
#define OSPFv3 1
#define OSPF_VERSION 3
#define OSPF_VLINK_MTU 1280 /* RFC 5340 A.1 */
#define AllSPFRouters _MI(0xFF020000, 0, 0, 5) /* FF02::5 */
#define AllDRouters _MI(0xFF020000, 0, 0, 6) /* FF02::6 */
#endif
#define LSREFRESHTIME 1800 /* 30 minutes */
#define MINLSINTERVAL 5
#define MINLSARRIVAL 1
#define LSINFINITY 0xffffff
#define DEFAULT_OSPFTICK 1
#define DEFAULT_RFC1583 0 /* compatibility with rfc1583 */
#define DEFAULT_STUB_COST 1000
#define DEFAULT_ECMP_LIMIT 16
#define DEFAULT_TRANSINT 40
struct ospf_config
{
struct proto_config c;
unsigned tick;
byte rfc1583;
byte abr;
int ecmp;
list area_list; /* list of struct ospf_area_config */
list vlink_list; /* list of struct ospf_iface_patt */
};
struct nbma_node
{
node n;
ip_addr ip;
byte eligible;
byte found;
};
struct area_net_config
{
node n;
struct prefix px;
int hidden;
u32 tag;
};
struct area_net
{
struct fib_node fn;
int hidden;
int active;
u32 metric;
u32 tag;
};
struct ospf_stubnet_config
{
node n;
struct prefix px;
int hidden, summary;
u32 cost;
};
struct ospf_area_config
{
node n;
u32 areaid;
u32 default_cost; /* Cost of default route for stub areas */
u8 type; /* Area type (standard, stub, NSSA), represented
by option flags (OPT_E, OPT_N) */
u8 summary; /* Import summaries to this stub/NSSA area, valid for ABR */
u8 default_nssa; /* Generate default NSSA route for NSSA+summary area */
u8 translator; /* Translator role, for NSSA ABR */
u32 transint; /* Translator stability interval */
list patt_list;
list net_list; /* List of aggregate networks for that area */
list enet_list; /* List of aggregate external (NSSA) networks */
list stubnet_list; /* List of stub networks added to Router LSA */
};
/* Option flags */
#define OPT_E 0x02
#define OPT_N 0x08
#define OPT_DC 0x20
#ifdef OSPFv2
#define OPT_P 0x08 /* flags P and N share position, see NSSA RFC */
#define OPT_EA 0x10
/* VEB flags are are stored independently in 'u16 options' */
#define OPT_RT_B (0x01 << 8)
#define OPT_RT_E (0x02 << 8)
#define OPT_RT_V (0x04 << 8)
#define OPT_RT_NT (0x10 << 8)
#endif
#ifdef OSPFv3
#define OPT_V6 0x01
#define OPT_R 0x10
/* VEB flags are are stored together with options in 'u32 options' */
#define OPT_RT_B (0x01 << 24)
#define OPT_RT_E (0x02 << 24)
#define OPT_RT_V (0x04 << 24)
#define OPT_RT_NT (0x10 << 24)
#define OPT_PX_NU 0x01
#define OPT_PX_LA 0x02
#define OPT_PX_P 0x08
#define OPT_PX_DN 0x10
#endif
struct ospf_iface
{
node n;
struct iface *iface; /* Nest's iface, non-NULL (unless type OSPF_IT_VLINK) */
struct ifa *addr; /* IP prefix associated with that OSPF iface */
struct ospf_area *oa;
struct ospf_iface_patt *cf;
pool *pool;
sock *sk; /* IP socket (for DD ...) */
list neigh_list; /* List of neigbours */
u32 cost; /* Cost of iface */
u32 waitint; /* number of sec before changing state from wait */
u32 rxmtint; /* number of seconds between LSA retransmissions */
u32 pollint; /* Poll interval */
u32 deadint; /* after "deadint" missing hellos is router dead */
u32 iface_id; /* Interface ID (iface->index or new value for vlinks) */
u32 vid; /* ID of peer of virtual link */
ip_addr vip; /* IP of peer of virtual link */
struct ospf_iface *vifa; /* OSPF iface which the vlink goes through */
struct ospf_area *voa; /* OSPF area which the vlink goes through */
u16 inftransdelay; /* The estimated number of seconds it takes to
transmit a Link State Update Packet over this
interface. LSAs contained in the update */
u16 helloint; /* number of seconds between hello sending */
#ifdef OSPFv2
list *passwords;
u16 autype;
u32 csn; /* Last used crypt seq number */
bird_clock_t csn_use; /* Last time when packet with that CSN was sent */
#endif
ip_addr all_routers; /* */
ip_addr drip; /* Designated router */
ip_addr bdrip; /* Backup DR */
u32 drid;
u32 bdrid;
s16 rt_pos_beg; /* Position of iface in Router-LSA, begin, inclusive */
s16 rt_pos_end; /* Position of iface in Router-LSA, end, exclusive */
#ifdef OSPFv3
s16 px_pos_beg; /* Position of iface in Rt Prefix-LSA, begin, inclusive */
s16 px_pos_end; /* Position of iface in Rt Prefix-LSA, end, exclusive */
u32 dr_iface_id; /* if drid is valid, this is iface_id of DR (for connecting network) */
u8 instance_id; /* Used to differentiate between more OSPF
instances on one interface */
#endif
u8 type; /* OSPF view of type */
#define OSPF_IT_BCAST 0
#define OSPF_IT_NBMA 1
#define OSPF_IT_PTP 2
#define OSPF_IT_PTMP 3
#define OSPF_IT_VLINK 4
#define OSPF_IT_UNDEF 5
u8 strictnbma; /* Can I talk with unknown neighbors? */
u8 stub; /* Inactive interface */
u8 state; /* Interface state machine */
#define OSPF_IS_DOWN 0 /* Not working */
#define OSPF_IS_LOOP 1 /* Iface with no link */
#define OSPF_IS_WAITING 2 /* Waiting for Wait timer */
#define OSPF_IS_PTP 3 /* PTP operational */
#define OSPF_IS_DROTHER 4 /* I'm on BCAST or NBMA and I'm not DR */
#define OSPF_IS_BACKUP 5 /* I'm BDR */
#define OSPF_IS_DR 6 /* I'm DR */
timer *wait_timer; /* WAIT timer */
timer *hello_timer; /* HELLOINT timer */
timer *poll_timer; /* Poll Interval - for NBMA */
/* Default values for interface parameters */
#define COST_D 10
#define RXMTINT_D 5
#define INFTRANSDELAY_D 1
#define PRIORITY_D 1
#define HELLOINT_D 10
#define POLLINT_D 20
#define DEADC_D 4
#define WAIT_DMH 4
/* Value of Wait timer - not found it in RFC * - using 4*HELLO */
struct top_hash_entry *net_lsa; /* Originated network LSA */
int orignet; /* Schedule network LSA origination */
#ifdef OSPFv3
int origlink; /* Schedule link LSA origination */
struct top_hash_entry *link_lsa; /* Originated link LSA */
struct top_hash_entry *pxn_lsa; /* Originated prefix LSA */
#endif
int fadj; /* Number of full adjacent neigh */
list nbma_list;
u8 priority; /* A router priority for DR election */
u8 ioprob;
#define OSPF_I_OK 0 /* Everything OK */
#define OSPF_I_SK 1 /* Socket open failed */
#define OSPF_I_LL 2 /* Missing link-local address (OSPFv3) */
u8 sk_dr; /* Socket is a member of DRouters group */
u8 marked; /* Used in OSPF reconfigure */
u16 rxbuf; /* Buffer size */
u8 check_link; /* Whether iface link change is used */
u8 ecmp_weight; /* Weight used for ECMP */
u8 ptp_netmask; /* Send real netmask for P2P */
};
struct ospf_md5
{
u16 zero;
u8 keyid;
u8 len;
u32 csn;
};
union ospf_auth
{
u8 password[8];
struct ospf_md5 md5;
};
/* Packet types */
#define HELLO_P 1 /* Hello */
#define DBDES_P 2 /* Database description */
#define LSREQ_P 3 /* Link state request */
#define LSUPD_P 4 /* Link state update */
#define LSACK_P 5 /* Link state acknowledgement */
/* Area IDs */
#define BACKBONE 0
struct immsb
{
#ifdef CPU_BIG_ENDIAN
u8 padding:5;
u8 i:1;
u8 m:1;
u8 ms:1;
#else
u8 ms:1;
u8 m:1;
u8 i:1;
u8 padding:5;
#endif
};
union imms
{
u8 byte;
struct immsb bit;
};
#define DBDES_MS 1
#define DBDES_M 2
#define DBDES_I 4
#ifdef OSPFv2
struct ospf_packet
{
u8 version;
u8 type;
u16 length;
u32 routerid;
u32 areaid;
u16 checksum;
u16 autype;
union ospf_auth u;
};
#else /* OSPFv3 packet descriptions */
struct ospf_packet
{
u8 version;
u8 type;
u16 length;
u32 routerid;
u32 areaid;
u16 checksum;
u8 instance_id;
u8 zero;
};
#endif
struct ospf_lsa_header
{
u16 age; /* LS Age */
#define LSA_MAXAGE 3600 /* 1 hour */
#define LSA_CHECKAGE 300 /* 5 minutes */
#define LSA_MAXAGEDIFF 900 /* 15 minutes */
#ifdef OSPFv2
u8 options;
u8 type;
#define LSA_T_RT 1
#define LSA_T_NET 2
#define LSA_T_SUM_NET 3
#define LSA_T_SUM_RT 4
#define LSA_T_EXT 5
#define LSA_T_NSSA 7
#define LSA_SCOPE_AREA 0x2000
#define LSA_SCOPE_AS 0x4000
#define LSA_SCOPE(lsa) (((lsa)->type == LSA_T_EXT) ? LSA_SCOPE_AS : LSA_SCOPE_AREA)
#else /* OSPFv3 */
u16 type;
#define LSA_T_RT 0x2001
#define LSA_T_NET 0x2002
#define LSA_T_SUM_NET 0x2003
#define LSA_T_SUM_RT 0x2004
#define LSA_T_EXT 0x4005
#define LSA_T_NSSA 0x2007
#define LSA_T_LINK 0x0008
#define LSA_T_PREFIX 0x2009
#define LSA_UBIT 0x8000
#define LSA_SCOPE_LINK 0x0000
#define LSA_SCOPE_AREA 0x2000
#define LSA_SCOPE_AS 0x4000
#define LSA_SCOPE_RES 0x6000
#define LSA_SCOPE_MASK 0x6000
#define LSA_SCOPE(lsa) ((lsa)->type & LSA_SCOPE_MASK)
#endif
u32 id;
u32 rt; /* Advertising router */
s32 sn; /* LS Sequence number */
#define LSA_INITSEQNO ((s32) 0x80000001)
#define LSA_MAXSEQNO ((s32) 0x7fffffff)
u16 checksum;
u16 length;
};
#define LSART_PTP 1
#define LSART_NET 2
#define LSART_STUB 3
#define LSART_VLNK 4
#ifdef OSPFv2
struct ospf_lsa_rt
{
#ifdef CPU_BIG_ENDIAN
u16 options; /* VEB flags only */
u16 links;
#else
u16 links;
u16 options; /* VEB flags only */
#endif
};
struct ospf_lsa_rt_link
{
u32 id;
u32 data;
#ifdef CPU_BIG_ENDIAN
u8 type;
u8 padding;
u16 metric;
#else
u16 metric;
u8 padding;
u8 type;
#endif
};
struct ospf_lsa_net
{
ip_addr netmask;
u32 routers[];
};
struct ospf_lsa_sum
{
ip_addr netmask;
u32 metric;
};
struct ospf_lsa_ext
{
ip_addr netmask;
u32 metric;
ip_addr fwaddr;
u32 tag;
};
#define LSA_SUM_TOS 0xFF000000
#define LSA_EXT_TOS 0x7F000000
#define LSA_EXT_EBIT 0x80000000
/* Endianity swap for lsa->type */
#define ntoht(x) x
#define htont(x) x
#else /* OSPFv3 */
struct ospf_lsa_rt
{
u32 options;
};
struct ospf_lsa_rt_link
{
#ifdef CPU_BIG_ENDIAN
u8 type;
u8 padding;
u16 metric;
#else
u16 metric;
u8 padding;
u8 type;
#endif
u32 lif; /* Local interface ID */
u32 nif; /* Neighbor interface ID */
u32 id; /* Neighbor router ID */
};
struct ospf_lsa_net
{
u32 options;
u32 routers[];
};
struct ospf_lsa_sum_net
{
u32 metric;
u32 prefix[];
};
struct ospf_lsa_sum_rt
{
u32 options;
u32 metric;
u32 drid;
};
struct ospf_lsa_ext
{
u32 metric;
u32 rest[];
};
struct ospf_lsa_link
{
u32 options;
ip_addr lladdr;
u32 pxcount;
u32 rest[];
};
struct ospf_lsa_prefix
{
#ifdef CPU_BIG_ENDIAN
u16 pxcount;
u16 ref_type;
#else
u16 ref_type;
u16 pxcount;
#endif
u32 ref_id;
u32 ref_rt;
u32 rest[];
};
#define LSA_EXT_EBIT 0x4000000
#define LSA_EXT_FBIT 0x2000000
#define LSA_EXT_TBIT 0x1000000
/* Endianity swap for lsa->type */
#define ntoht(x) ntohs(x)
#define htont(x) htons(x)
#endif
#define METRIC_MASK 0x00FFFFFF
#define OPTIONS_MASK 0x00FFFFFF
static inline unsigned
lsa_rt_count(struct ospf_lsa_header *lsa)
{
return (lsa->length - sizeof(struct ospf_lsa_header) - sizeof(struct ospf_lsa_rt))
/ sizeof(struct ospf_lsa_rt_link);
}
static inline unsigned
lsa_net_count(struct ospf_lsa_header *lsa)
{
return (lsa->length - sizeof(struct ospf_lsa_header) - sizeof(struct ospf_lsa_net))
/ sizeof(u32);
}
#ifdef OSPFv3
#define IPV6_PREFIX_SPACE(x) ((((x) + 63) / 32) * 4)
#define IPV6_PREFIX_WORDS(x) (((x) + 63) / 32)
static inline u32 *
lsa_get_ipv6_prefix(u32 *buf, ip_addr *addr, int *pxlen, u8 *pxopts, u16 *rest)
{
u8 pxl = (*buf >> 24);
*pxopts = (*buf >> 16);
*rest = *buf;
*pxlen = pxl;
buf++;
*addr = IPA_NONE;
if (pxl > 0)
_I0(*addr) = *buf++;
if (pxl > 32)
_I1(*addr) = *buf++;
if (pxl > 64)
_I2(*addr) = *buf++;
if (pxl > 96)
_I3(*addr) = *buf++;
/* Clean up remaining bits */
if (pxl < 128)
addr->addr[pxl / 32] &= u32_mkmask(pxl % 32);
return buf;
}
static inline u32 *
lsa_get_ipv6_addr(u32 *buf, ip_addr *addr)
{
*addr = *(ip_addr *) buf;
return buf + 4;
}
static inline u32 *
put_ipv6_prefix(u32 *buf, ip_addr addr, u8 pxlen, u8 pxopts, u16 lh)
{
*buf++ = ((pxlen << 24) | (pxopts << 16) | lh);
if (pxlen > 0)
*buf++ = _I0(addr);
if (pxlen > 32)
*buf++ = _I1(addr);
if (pxlen > 64)
*buf++ = _I2(addr);
if (pxlen > 96)
*buf++ = _I3(addr);
return buf;
}
static inline u32 *
put_ipv6_addr(u32 *buf, ip_addr addr)
{
*(ip_addr *) buf = addr;
return buf + 4;
}
#endif
struct ospf_lsreq_header
{
u32 type;
u32 id;
u32 rt; /* Advertising router */
};
struct l_lsr_head
{
node n;
struct ospf_lsreq_header lsh;
};
struct ospf_neighbor
{
node n;
pool *pool;
struct ospf_iface *ifa;
u8 state;
#define NEIGHBOR_DOWN 0
#define NEIGHBOR_ATTEMPT 1
#define NEIGHBOR_INIT 2
#define NEIGHBOR_2WAY 3
#define NEIGHBOR_EXSTART 4
#define NEIGHBOR_EXCHANGE 5
#define NEIGHBOR_LOADING 6
#define NEIGHBOR_FULL 7
timer *inactim; /* Inactivity timer */
union imms imms; /* I, M, Master/slave received */
u32 dds; /* DD Sequence number being sent */
u32 ddr; /* last Dat Des packet received */
union imms myimms; /* I, M Master/slave */
u32 rid; /* Router ID */
ip_addr ip; /* IP of it's interface */
u8 priority; /* Priority */
u8 adj; /* built adjacency? */
u32 options; /* Options received */
/* dr and bdr store IP address in OSPFv2 and router ID in OSPFv3,
we use the same type to simplify handling */
u32 dr; /* Neigbour's idea of DR */
u32 bdr; /* Neigbour's idea of BDR */
#ifdef OSPFv3
u32 iface_id; /* ID of Neighbour's iface connected to common network */
#endif
siterator dbsi; /* Database summary list iterator */
slist lsrql; /* Link state request */
struct top_graph *lsrqh; /* LSA graph */
siterator lsrqi;
slist lsrtl; /* Link state retransmission list */
siterator lsrti;
struct top_graph *lsrth;
void *ldbdes; /* Last database description packet */
timer *rxmt_timer; /* RXMT timer */
list ackl[2];
#define ACKL_DIRECT 0
#define ACKL_DELAY 1
timer *ackd_timer; /* Delayed ack timer */
u32 csn; /* Last received crypt seq number (for MD5) */
};
/* Definitions for interface state machine */
#define ISM_UP 0 /* Interface Up */
#define ISM_WAITF 1 /* Wait timer fired */
#define ISM_BACKS 2 /* Backup seen */
#define ISM_NEICH 3 /* Neighbor change */
#define ISM_LOOP 4 /* Link down */
#define ISM_UNLOOP 5 /* Link up */
#define ISM_DOWN 6 /* Interface down */
/* Definitions for neighbor state machine */
#define INM_HELLOREC 0 /* Hello Received */
#define INM_START 1 /* Neighbor start - for NBMA */
#define INM_2WAYREC 2 /* 2-Way received */
#define INM_NEGDONE 3 /* Negotiation done */
#define INM_EXDONE 4 /* Exchange done */
#define INM_BADLSREQ 5 /* Bad LS Request */
#define INM_LOADDONE 6 /* Load done */
#define INM_ADJOK 7 /* AdjOK? */
#define INM_SEQMIS 8 /* Sequence number mismatch */
#define INM_1WAYREC 9 /* 1-Way */
#define INM_KILLNBR 10 /* Kill Neighbor */
#define INM_INACTTIM 11 /* Inactivity timer */
#define INM_LLDOWN 12 /* Line down */
struct ospf_area
{
node n;
u32 areaid;
struct ospf_area_config *ac; /* Related area config */
struct top_hash_entry *rt; /* My own router LSA */
struct top_hash_entry *pxr_lsa; /* Originated prefix LSA */
list cand; /* List of candidates for RT calc. */
struct fib net_fib; /* Networks to advertise or not */
struct fib enet_fib; /* External networks for NSSAs */
u32 options; /* Optional features */
byte origrt; /* Rt lsa origination scheduled? */
byte trcap; /* Transit capability? */
byte marked; /* Used in OSPF reconfigure */
byte translate; /* Translator state (TRANS_*), for NSSA ABR */
timer *translator_timer; /* For NSSA translator switch */
struct proto_ospf *po;
struct fib rtr; /* Routing tables for routers */
};
#define TRANS_OFF 0
#define TRANS_ON 1
#define TRANS_WAIT 2 /* Waiting before the end of translation */
struct proto_ospf
{
struct proto proto;
timer *disp_timer; /* OSPF proto dispatcher */
unsigned tick;
struct top_graph *gr; /* LSA graph */
slist lsal; /* List of all LSA's */
int calcrt; /* Routing table calculation scheduled?
0=no, 1=normal, 2=forced reload */
list iface_list; /* Interfaces we really use */
list area_list;
int areano; /* Number of area I belong to */
struct fib rtf; /* Routing table */
byte rfc1583; /* RFC1583 compatibility */
byte ebit; /* Did I originate any ext lsa? */
byte ecmp; /* Maximal number of nexthops in ECMP route, or 0 */
struct ospf_area *backbone; /* If exists */
void *lsab; /* LSA buffer used when originating router LSAs */
int lsab_size, lsab_used;
linpool *nhpool; /* Linpool used for next hops computed in SPF */
u32 router_id;
u32 last_vlink_id; /* Interface IDs for vlinks (starts at 0x80000000) */
};
struct ospf_iface_patt
{
struct iface_patt i;
u32 type;
u32 stub;
u32 cost;
u32 helloint;
u32 rxmtint;
u32 pollint;
u32 waitint;
u32 deadc;
u32 deadint;
u32 inftransdelay;
list nbma_list;
u32 priority;
u32 voa;
u32 vid;
u16 rxbuf;
#define OSPF_RXBUF_NORMAL 0
#define OSPF_RXBUF_LARGE 1
#define OSPF_RXBUF_MINSIZE 256 /* Minimal allowed size */
u16 autype; /* Not really used in OSPFv3 */
#define OSPF_AUTH_NONE 0
#define OSPF_AUTH_SIMPLE 1
#define OSPF_AUTH_CRYPT 2
#define OSPF_AUTH_CRYPT_SIZE 16
u8 strictnbma;
u8 check_link;
u8 ecmp_weight;
u8 real_bcast; /* Not really used in OSPFv3 */
u8 ptp_netmask; /* bool but 2 for unspecified */
#ifdef OSPFv2
list *passwords;
#endif
#ifdef OSPFv3
u8 instance_id;
#endif
};
int ospf_import_control(struct proto *p, rte **new, ea_list **attrs,
struct linpool *pool);
struct ea_list *ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs);
void schedule_rt_lsa(struct ospf_area *oa);
void schedule_rtcalc(struct proto_ospf *po);
void schedule_net_lsa(struct ospf_iface *ifa);
struct ospf_area *ospf_find_area(struct proto_ospf *po, u32 aid);
static inline struct ospf_area *ospf_main_area(struct proto_ospf *po)
{ return (po->areano == 1) ? HEAD(po->area_list) : po->backbone; }
static inline int oa_is_stub(struct ospf_area *oa)
{ return (oa->options & (OPT_E | OPT_N)) == 0; }
static inline int oa_is_ext(struct ospf_area *oa)
{ return oa->options & OPT_E; }
static inline int oa_is_nssa(struct ospf_area *oa)
{ return oa->options & OPT_N; }
#ifdef OSPFv3
void schedule_link_lsa(struct ospf_iface *ifa);
#else
static inline void schedule_link_lsa(struct ospf_iface *ifa UNUSED) {}
#endif
void ospf_sh_neigh(struct proto *p, char *iff);
void ospf_sh(struct proto *p);
void ospf_sh_iface(struct proto *p, char *iff);
void ospf_sh_state(struct proto *p, int verbose, int reachable);
#define SH_ROUTER_SELF 0xffffffff
struct lsadb_show_data {
struct symbol *name; /* Protocol to request data from */
u16 type; /* LSA Type, 0 -> all */
u16 scope; /* Scope, 0 -> all, hack to handle link scope as 1 */
u32 area; /* Specified for area scope */
u32 lsid; /* LSA ID, 0 -> all */
u32 router; /* Advertising router, 0 -> all */
};
void ospf_sh_lsadb(struct lsadb_show_data *ld);
#define EA_OSPF_METRIC1 EA_CODE(EAP_OSPF, 0)
#define EA_OSPF_METRIC2 EA_CODE(EAP_OSPF, 1)
#define EA_OSPF_TAG EA_CODE(EAP_OSPF, 2)
#define EA_OSPF_ROUTER_ID EA_CODE(EAP_OSPF, 3)
#include "proto/ospf/rt.h"
#include "proto/ospf/hello.h"
#include "proto/ospf/packet.h"
#include "proto/ospf/iface.h"
#include "proto/ospf/neighbor.h"
#include "proto/ospf/topology.h"
#include "proto/ospf/dbdes.h"
#include "proto/ospf/lsreq.h"
#include "proto/ospf/lsupd.h"
#include "proto/ospf/lsack.h"
#include "proto/ospf/lsalib.h"
#endif /* _BIRD_OSPF_H_ */
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