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Nest: Neighbor cache cleanups

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Simplify neighbor cache code, fix several minor bugs, and improve
handling of ONLINK flag.
This commit is contained in:
Ondrej Zajicek (work) 2018-06-27 16:51:53 +02:00
parent 45f28d8581
commit 586c1800c4
13 changed files with 267 additions and 272 deletions
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2
filter/filter.c
View File

@ -974,7 +974,7 @@ interpret(struct f_inst *what)
case SA_GW:
{
ip_addr ip = v1.val.ip;
neighbor *n = neigh_find(rta->src->proto, &ip, 0);
neighbor *n = neigh_find(rta->src->proto, ip, NULL, 0);
if (!n || (n->scope == SCOPE_HOST))
runtime( "Invalid gw address" );

7
lib/hash.h
View File

@ -230,4 +230,11 @@ mem_hash(void *p, uint s)
return mem_hash_value(&h);
}
static inline uint
ptr_hash(void *ptr)
{
uintptr_t p = (uintptr_t) ptr;
return p ^ (p << 8) ^ (p >> 16);
}
#endif

20
nest/iface.h
View File

@ -124,29 +124,21 @@ typedef struct neighbor {
ip_addr addr; /* Address of the neighbor */
struct ifa *ifa; /* Ifa on related iface */
struct iface *iface; /* Interface it's connected to */
struct iface *ifreq; /* Requested iface, NULL for any */
struct proto *proto; /* Protocol this belongs to */
void *data; /* Protocol-specific data */
unsigned aux; /* Protocol-specific data */
unsigned flags;
int scope; /* Address scope, -1 for unreachable sticky neighbors,
uint aux; /* Protocol-specific data */
u16 flags; /* NEF_* flags */
s16 scope; /* Address scope, -1 for unreachable neighbors,
SCOPE_HOST when it's our own address */
} neighbor;
#define NEF_STICKY 1
#define NEF_ONLINK 2
#define NEF_BIND 4 /* Used internally for neighbors bound to an iface */
#define NEF_IFACE 8 /* Neighbors bound to iface */
#define NEF_IFACE 4 /* Entry for whole iface */
neighbor *neigh_find(struct proto *, ip_addr *, unsigned flags);
neighbor *neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags);
neighbor *neigh_find_iface(struct proto *p, struct iface *ifa);
static inline int neigh_connected_to(struct proto *p, ip_addr *a, struct iface *i)
{
neighbor *n = neigh_find(p, a, 0);
return n && n->iface == i;
}
neighbor *neigh_find(struct proto *p, ip_addr a, struct iface *ifa, uint flags);
void neigh_dump(neighbor *);
void neigh_dump_all(void);

471
nest/neighbor.c
View File

@ -2,6 +2,8 @@
* BIRD -- Neighbor Cache
*
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
* (c) 2008--2018 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2008--2018 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@ -10,32 +12,38 @@
* DOC: Neighbor cache
*
* Most routing protocols need to associate their internal state data with
* neighboring routers, check whether an address given as the next hop
* attribute of a route is really an address of a directly connected host
* and which interface is it connected through. Also, they often need to
* be notified when a neighbor ceases to exist or when their long awaited
* neighbor becomes connected. The neighbor cache is there to solve all
* these problems.
* neighboring routers, check whether an address given as the next hop attribute
* of a route is really an address of a directly connected host and which
* interface is it connected through. Also, they often need to be notified when
* a neighbor ceases to exist or when their long awaited neighbor becomes
* connected. The neighbor cache is there to solve all these problems.
*
* The neighbor cache maintains a collection of neighbor entries. Each
* entry represents one IP address corresponding to either our directly
* connected neighbor or our own end of the link (when the scope of the
* address is set to %SCOPE_HOST) together with per-neighbor data belonging to a
* single protocol.
* The neighbor cache maintains a collection of neighbor entries. Each entry
* represents one IP address corresponding to either our directly connected
* neighbor or our own end of the link (when the scope of the address is set to
* %SCOPE_HOST) together with per-neighbor data belonging to a single protocol.
* A neighbor entry may be bound to a specific interface, which is required for
* link-local IP addresses and optional for global IP addresses.
*
* Active entries represent known neighbors and are stored in a hash
* table (to allow fast retrieval based on the IP address of the node) and
* two linked lists: one global and one per-interface (allowing quick
* processing of interface change events). Inactive entries exist only
* when the protocol has explicitly requested it via the %NEF_STICKY
* flag because it wishes to be notified when the node will again become
* a neighbor. Such entries are enqueued in a special list which is walked
* whenever an interface changes its state to up. Neighbor entry VRF
* association is implied by respective protocol.
* Neighbor cache entries are stored in a hash table, which is indexed by triple
* (protocol, IP, requested-iface), so if both regular and iface-bound neighbors
* are requested, they are represented by two neighbor cache entries. Active
* entries are also linked in per-interface list (allowing quick processing of
* interface change events). Inactive entries exist only when the protocol has
* explicitly requested it via the %NEF_STICKY flag because it wishes to be
* notified when the node will again become a neighbor. Such entries are instead
* linked in a special list, which is walked whenever an interface changes its
* state to up. Neighbor entry VRF association is implied by respective
* protocol.
*
* Besides the already mentioned %NEF_STICKY flag, there is also %NEF_ONLINK,
* which specifies that neighbor should be considered reachable on given iface
* regardless of associated address ranges, and %NEF_IFACE, which represents
* pseudo-neighbor entry for whole interface (and uses %IPA_NONE IP address).
*
* When a neighbor event occurs (a neighbor gets disconnected or a sticky
* inactive neighbor becomes connected), the protocol hook neigh_notify()
* is called to advertise the change.
* inactive neighbor becomes connected), the protocol hook neigh_notify() is
* called to advertise the change.
*/
#undef LOCAL_DEBUG
@ -43,126 +51,151 @@
#include "nest/bird.h"
#include "nest/iface.h"
#include "nest/protocol.h"
#include "lib/hash.h"
#include "lib/resource.h"
#define NEIGH_HASH_SIZE 256
#define NEIGH_HASH_OFFSET 24
static slab *neigh_slab;
static list sticky_neigh_list, iface_neigh_list, neigh_hash_table[NEIGH_HASH_SIZE];
static list neigh_hash_table[NEIGH_HASH_SIZE], sticky_neigh_list;
static inline uint
neigh_hash(struct proto *p, ip_addr *a)
neigh_hash(struct proto *p, ip_addr a, struct iface *i)
{
return (p->hash_key ^ ipa_hash(*a)) >> NEIGH_HASH_OFFSET;
return (p->hash_key ^ ipa_hash(a) ^ ptr_hash(i)) >> NEIGH_HASH_OFFSET;
}
static int
if_connected(ip_addr *a, struct iface *i, struct ifa **ap)
if_connected(ip_addr a, struct iface *i, struct ifa **ap, uint flags)
{
struct ifa *b;
/* Handle iface pseudo-neighbors */
if (flags & NEF_IFACE)
return *ap = NULL, (i->flags & IF_UP) ? SCOPE_HOST : -1;
/* Host addresses match even if iface is down */
WALK_LIST(b, i->addrs)
if (ipa_equal(a, b->ip))
return *ap = b, SCOPE_HOST;
/* Rest do not match if iface is down */
if (!(i->flags & IF_UP))
return *ap = NULL, -1;
/* Regular neighbors */
WALK_LIST(b, i->addrs)
{
*ap = NULL;
return -1;
if (b->flags & IA_PEER)
{
if (ipa_equal(a, b->opposite))
return *ap = b, b->scope;
}
else
{
if (ipa_in_netX(a, &b->prefix))
{
/* Do not allow IPv4 network and broadcast addresses */
if (ipa_is_ip4(a) &&
(net_pxlen(&b->prefix) < (IP4_MAX_PREFIX_LENGTH - 1)) &&
(ipa_equal(a, net_prefix(&b->prefix)) || /* Network address */
ipa_equal(a, b->brd))) /* Broadcast */
return *ap = NULL, -1;
return *ap = b, b->scope;
}
}
}
WALK_LIST(b, i->addrs)
{
*ap = b;
/* Handle ONLINK flag */
if (flags & NEF_ONLINK)
return *ap = NULL, ipa_classify(a) & IADDR_SCOPE_MASK;
if (ipa_equal(*a, b->ip))
return SCOPE_HOST;
if (b->flags & IA_PEER)
{
if (ipa_equal(*a, b->opposite))
return b->scope;
}
else
{
if (ipa_in_netX(*a, &b->prefix))
{
/* Do not allow IPv4 network and broadcast addresses */
if (ipa_is_ip4(*a) &&
(net_pxlen(&b->prefix) < (IP4_MAX_PREFIX_LENGTH - 1)) &&
(ipa_equal(*a, net_prefix(&b->prefix)) || /* Network address */
ipa_equal(*a, b->brd))) /* Broadcast */
{
*ap = NULL;
return -1;
}
return *ap = NULL, -1;
}
return b->scope;
}
}
static inline int
if_connected_any(ip_addr a, struct iface *vrf, struct iface **iface, struct ifa **addr, uint flags)
{
struct iface *i;
struct ifa *b;
int s, scope = -1;
*iface = NULL;
*addr = NULL;
/* Get first match, but prefer SCOPE_HOST to other matches */
WALK_LIST(i, iface_list)
if ((!vrf || vrf == i->master) && ((s = if_connected(a, i, &b, flags)) >= 0))
if ((scope < 0) || ((scope > SCOPE_HOST) && (s == SCOPE_HOST)))
{
*iface = i;
*addr = b;
scope = s;
}
*ap = NULL;
return -1;
return scope;
}
/**
* neigh_find - find or create a neighbor entry.
* @p: protocol which asks for the entry.
* @a: pointer to IP address of the node to be searched for.
* @flags: 0 or %NEF_STICKY if you want to create a sticky entry.
* neigh_find - find or create a neighbor entry
* @p: protocol which asks for the entry
* @a: IP address of the node to be searched for
* @iface: optionally bound neighbor to this iface (may be NULL)
* @flags: %NEF_STICKY for sticky entry, %NEF_ONLINK for onlink entry
*
* Search the neighbor cache for a node with given IP address. If
* it's found, a pointer to the neighbor entry is returned. If no
* such entry exists and the node is directly connected on
* one of our active interfaces, a new entry is created and returned
* to the caller with protocol-dependent fields initialized to zero.
* If the node is not connected directly or *@a is not a valid unicast
* IP address, neigh_find() returns %NULL.
* Search the neighbor cache for a node with given IP address. Iface can be
* specified for link-local addresses or for cases, where neighbor is expected
* on given interface. If it is found, a pointer to the neighbor entry is
* returned. If no such entry exists and the node is directly connected on one
* of our active interfaces, a new entry is created and returned to the caller
* with protocol-dependent fields initialized to zero. If the node is not
* connected directly or *@a is not a valid unicast IP address, neigh_find()
* returns %NULL.
*/
neighbor *
neigh_find(struct proto *p, ip_addr *a, unsigned flags)
{
return neigh_find2(p, a, NULL, flags);
}
neighbor *
neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags)
neigh_find(struct proto *p, ip_addr a, struct iface *iface, uint flags)
{
neighbor *n;
int class, scope = -1;
uint h = neigh_hash(p, a);
struct iface *i;
struct ifa *addr;
uint h = neigh_hash(p, a, iface);
struct iface *ifreq = iface;
struct ifa *addr = NULL;
WALK_LIST(n, neigh_hash_table[h]) /* Search the cache */
if (n->proto == p && ipa_equal(*a, n->addr) && (!ifa || (ifa == n->iface)))
if ((n->proto == p) && ipa_equal(n->addr, a) && (n->ifreq == iface))
return n;
class = ipa_classify(*a);
if (class < 0) /* Invalid address */
return NULL;
if (((class & IADDR_SCOPE_MASK) == SCOPE_HOST) ||
(((class & IADDR_SCOPE_MASK) == SCOPE_LINK) && (ifa == NULL)) ||
!(class & IADDR_HOST))
return NULL; /* Bad scope or a somecast */
if (ifa)
{
scope = if_connected(a, ifa, &addr);
flags |= NEF_BIND;
if ((scope < 0) && (flags & NEF_ONLINK))
scope = class & IADDR_SCOPE_MASK;
}
if (flags & NEF_IFACE)
{
if (ipa_nonzero(a) || !iface)
return NULL;
}
else
WALK_LIST(i, iface_list)
if ((!p->vrf || p->vrf == i->master) &&
((scope = if_connected(a, i, &addr)) >= 0))
{
ifa = i;
break;
}
{
class = ipa_classify(a);
if (class < 0) /* Invalid address */
return NULL;
if (((class & IADDR_SCOPE_MASK) == SCOPE_HOST) ||
(((class & IADDR_SCOPE_MASK) == SCOPE_LINK) && !iface) ||
!(class & IADDR_HOST))
return NULL; /* Bad scope or a somecast */
}
if ((flags & NEF_ONLINK) && !iface)
return NULL;
if (iface)
{
scope = if_connected(a, iface, &addr, flags);
iface = (scope < 0) ? NULL : iface;
}
else
scope = if_connected_any(a, p->vrf, &iface, &addr, flags);
/* scope < 0 means i don't know neighbor */
/* scope >= 0 implies ifa != NULL */
/* scope >= 0 <=> iface != NULL */
if ((scope < 0) && !(flags & NEF_STICKY))
return NULL;
@ -170,52 +203,15 @@ neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags)
n = sl_alloc(neigh_slab);
memset(n, 0, sizeof(neighbor));
n->addr = *a;
if (scope >= 0)
{
add_tail(&neigh_hash_table[h], &n->n);
add_tail(&ifa->neighbors, &n->if_n);
}
else
{
add_tail(&sticky_neigh_list, &n->n);
scope = -1;
}
n->iface = ifa;
add_tail(&neigh_hash_table[h], &n->n);
add_tail((scope >= 0) ? &iface->neighbors : &sticky_neigh_list, &n->if_n);
n->addr = a;
n->ifa = addr;
n->iface = iface;
n->ifreq = ifreq;
n->proto = p;
n->data = NULL;
n->aux = 0;
n->flags = flags;
n->scope = scope;
return n;
}
neighbor *
neigh_find_iface(struct proto *p, struct iface *ifa)
{
neighbor *n;
node *nn;
/* We keep neighbors with NEF_IFACE foremost in ifa->neighbors list */
WALK_LIST2(n, nn, ifa->neighbors, if_n)
{
if (! (n->flags & NEF_IFACE))
break;
if (n->proto == p)
return n;
}
n = sl_alloc(neigh_slab);
memset(n, 0, sizeof(neighbor));
add_tail(&iface_neigh_list, &n->n);
add_head(&ifa->neighbors, &n->if_n);
n->iface = ifa;
n->proto = p;
n->flags = NEF_IFACE;
n->scope = (ifa->flags & IF_UP) ? SCOPE_HOST : -1;
return n;
}
@ -224,30 +220,26 @@ neigh_find_iface(struct proto *p, struct iface *ifa)
* neigh_dump - dump specified neighbor entry.
* @n: the entry to dump
*
* This functions dumps the contents of a given neighbor entry
* to debug output.
* This functions dumps the contents of a given neighbor entry to debug output.
*/
void
neigh_dump(neighbor *n)
{
debug("%p %I ", n, n->addr);
if (n->iface)
debug("%s ", n->iface->name);
else
debug("[] ");
debug("%p %I %s %s ", n, n->addr,
n->iface ? n->iface->name : "[]",
n->ifreq ? n->ifreq->name : "[]");
debug("%s %p %08x scope %s", n->proto->name, n->data, n->aux, ip_scope_text(n->scope));
if (n->flags & NEF_STICKY)
debug(" STICKY");
if (n->flags & NEF_IFACE)
debug(" IFACE");
if (n->flags & NEF_ONLINK)
debug(" ONLINK");
debug("\n");
}
/**
* neigh_dump_all - dump all neighbor entries.
*
* This function dumps the contents of the neighbor cache to
* debug output.
* This function dumps the contents of the neighbor cache to debug output.
*/
void
neigh_dump_all(void)
@ -256,73 +248,109 @@ neigh_dump_all(void)
int i;
debug("Known neighbors:\n");
WALK_LIST(n, sticky_neigh_list)
neigh_dump(n);
WALK_LIST(n, iface_neigh_list)
neigh_dump(n);
for(i=0; i<NEIGH_HASH_SIZE; i++)
WALK_LIST(n, neigh_hash_table[i])
neigh_dump(n);
debug("\n");
}
static inline void
neigh_notify(neighbor *n)
{
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
n->proto->neigh_notify(n);
}
static void
neigh_up(neighbor *n, struct iface *i, int scope, struct ifa *a)
neigh_up(neighbor *n, struct iface *i, struct ifa *a, int scope)
{
DBG("Waking up sticky neighbor %I\n", n->addr);
n->iface = i;
n->ifa = a;
n->scope = scope;
if (! (n->flags & NEF_IFACE))
{
add_tail(&i->neighbors, &n->if_n);
rem_node(&n->n);
add_tail(&neigh_hash_table[neigh_hash(n->proto, &n->addr)], &n->n);
}
rem_node(&n->if_n);
add_tail(&i->neighbors, &n->if_n);
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
n->proto->neigh_notify(n);
neigh_notify(n);
}
static void
neigh_down(neighbor *n)
{
DBG("Flushing neighbor %I on %s\n", n->addr, n->iface->name);
if (! (n->flags & (NEF_BIND | NEF_IFACE)))
n->iface = NULL;
n->iface = NULL;
n->ifa = NULL;
n->scope = -1;
if (! (n->flags & NEF_IFACE))
rem_node(&n->if_n);
add_tail(&sticky_neigh_list, &n->if_n);
neigh_notify(n);
}
static inline void
neigh_free(neighbor *n)
{
rem_node(&n->n);
rem_node(&n->if_n);
sl_free(neigh_slab, n);
}
/**
* neigh_update: update neighbor entry w.r.t. change on specific iface
* @n: neighbor to update
* @iface: changed iface
*
* The function recalculates state of the neighbor entry @n assuming that only
* the interface @iface may changed its state or addresses. Then, appropriate
* actions are executed (the neighbor goes up, down, up-down, or just notified).
*/
void
neigh_update(neighbor *n, struct iface *iface)
{
struct ifa *ifa = NULL;
int scope = -1;
/* Iface-bound neighbors ignore other ifaces */
if (n->ifreq && (n->ifreq != iface))
return;
/* VRF-bound neighbors ignore changes in other VRFs */
if (n->proto->vrf && (n->proto->vrf != iface->master))
return;
scope = if_connected(n->addr, iface, &ifa, n->flags);
/* When neighbor is going down, try to respawn it on other ifaces */
if ((scope < 0) && (n->scope >= 0) && !n->ifreq && (n->flags & NEF_STICKY))
scope = if_connected_any(n->addr, n->proto->vrf, &iface, &ifa, n->flags);
/* No change or minor change - ignore or notify */
if ((scope == n->scope) && (iface == n->iface))
{
if (ifa != n->ifa)
{
rem_node(&n->if_n);
rem_node(&n->n);
n->ifa = ifa;
neigh_notify(n);
}
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
n->proto->neigh_notify(n);
return;
}
if (n->flags & NEF_STICKY)
{
add_tail(&sticky_neigh_list, &n->n);
/* Major change - going down and/or going up */
/* Respawn neighbor if there is another matching prefix */
struct iface *i;
struct ifa *a;
int scope;
if (n->scope >= 0)
neigh_down(n);
if (!n->iface)
WALK_LIST(i, iface_list)
if ((scope = if_connected(&n->addr, i, &a)) >= 0)
{
neigh_up(n, i, scope, a);
return;
}
}
if ((n->scope < 0) && !(n->flags & NEF_STICKY))
{
neigh_free(n);
return;
}
if (! (n->flags & (NEF_STICKY | NEF_IFACE)))
sl_free(neigh_slab, n);
if (scope >= 0)
neigh_up(n, iface, ifa, scope);
}
@ -338,21 +366,11 @@ neigh_down(neighbor *n)
void
neigh_if_up(struct iface *i)
{
struct ifa *a;
neighbor *n;
node *x, *y;
int scope;
/* Wake up all iface neighbors */
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
if ((n->scope < 0) && (n->flags & NEF_IFACE))
neigh_up(n, i, SCOPE_HOST, NULL);
/* Wake up appropriate sticky neighbors */
WALK_LIST_DELSAFE(n, x, sticky_neigh_list)
if ((!n->iface || n->iface == i) &&
((scope = if_connected(&n->addr, i, &a)) >= 0))
neigh_up(n, i, scope, a);
WALK_LIST2_DELSAFE(n, x, y, sticky_neigh_list, if_n)
neigh_update(n, i);
}
/**
@ -361,8 +379,7 @@ neigh_if_up(struct iface *i)
*
* Notify the neighbor cache that an interface has ceased to exist.
*
* It causes all entries belonging to neighbors connected to this interface
* to be flushed.
* It causes all neighbors connected to this interface to be updated or removed.
*/
void
neigh_if_down(struct iface *i)
@ -371,16 +388,15 @@ neigh_if_down(struct iface *i)
node *x, *y;
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
neigh_down(n);
neigh_update(n, i);
}
/**
* neigh_if_link - notify neighbor cache about interface link change
* @i: the interface in question
*
* Notify the neighbor cache that an interface changed link state.
* All owners of neighbor entries connected to this interface are
* notified.
* Notify the neighbor cache that an interface changed link state. All owners of
* neighbor entries connected to this interface are notified.
*/
void
neigh_if_link(struct iface *i)
@ -389,8 +405,7 @@ neigh_if_link(struct iface *i)
node *x, *y;
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
n->proto->neigh_notify(n);
neigh_notify(n);
}
/**
@ -407,21 +422,16 @@ void
neigh_ifa_update(struct ifa *a)
{
struct iface *i = a->iface;
struct ifa *aa;
node *x, *y;
neighbor *n;
int scope;
node *x, *y;
/* Remove all neighbors whose scope has changed */
/* Update all neighbors whose scope has changed */
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
if (n->ifa && (if_connected(&n->addr, i, &aa) != n->scope))
neigh_down(n);
neigh_update(n, i);
/* Wake up all sticky neighbors that are reachable now */
WALK_LIST_DELSAFE(n, x, sticky_neigh_list)
if ((!n->iface || n->iface == i) &&
((scope = if_connected(&n->addr, i, &aa)) >= 0))
neigh_up(n, i, scope, aa);
WALK_LIST2_DELSAFE(n, x, y, sticky_neigh_list, if_n)
neigh_update(n, i);
}
static inline void
@ -429,10 +439,8 @@ neigh_prune_one(neighbor *n)
{
if (n->proto->proto_state != PS_DOWN)
return;
rem_node(&n->n);
if (n->if_n.next)
rem_node(&n->if_n);
sl_free(neigh_slab, n);
neigh_free(n);
}
/**
@ -453,10 +461,6 @@ neigh_prune(void)
for(i=0; i<NEIGH_HASH_SIZE; i++)
WALK_LIST_DELSAFE(n, m, neigh_hash_table[i])
neigh_prune_one(n);
WALK_LIST_DELSAFE(n, m, sticky_neigh_list)
neigh_prune_one(n);
WALK_LIST_DELSAFE(n, m, iface_neigh_list)
neigh_prune_one(n);
}
/**
@ -471,9 +475,8 @@ neigh_init(pool *if_pool)
{
neigh_slab = sl_new(if_pool, sizeof(neighbor));
init_list(&sticky_neigh_list);
init_list(&iface_neigh_list);
for(int i = 0; i < NEIGH_HASH_SIZE; i++)
init_list(&neigh_hash_table[i]);
init_list(&sticky_neigh_list);
}

8
nest/rt-table.c
View File

@ -39,6 +39,7 @@
#include "lib/string.h"
#include "conf/conf.h"
#include "filter/filter.h"
#include "lib/hash.h"
#include "lib/string.h"
#include "lib/alloca.h"
@ -2220,13 +2221,6 @@ rt_feed_channel_abort(struct channel *c)
}
}
static inline unsigned
ptr_hash(void *ptr)
{
uintptr_t p = (uintptr_t) ptr;
return p ^ (p << 8) ^ (p >> 16);
}
static inline u32
hc_hash(ip_addr a, rtable *dep)
{

2
proto/bfd/bfd.c
View File

@ -775,7 +775,7 @@ bfd_start_neighbor(struct bfd_proto *p, struct bfd_neighbor *n)
return;
}
struct neighbor *nb = neigh_find2(&p->p, &n->addr, n->iface, NEF_STICKY);
struct neighbor *nb = neigh_find(&p->p, n->addr, n->iface, NEF_STICKY);
if (!nb)
{
log(L_ERR "%s: Invalid remote address %I%J", p->p.name, n->addr, n->iface);

4
proto/bgp/bgp.c
View File

@ -1277,7 +1277,7 @@ bgp_start_locked(struct object_lock *lock)
return;
}
neighbor *n = neigh_find2(&p->p, &cf->remote_ip, cf->iface, NEF_STICKY);
neighbor *n = neigh_find(&p->p, cf->remote_ip, cf->iface, NEF_STICKY);
if (!n)
{
log(L_ERR "%s: Invalid remote address %I%J", p->p.name, cf->remote_ip, cf->iface);
@ -1521,7 +1521,7 @@ bgp_channel_start(struct channel *C)
if (ipa_zero(c->next_hop_addr))
{
/* We know the iface for single-hop, we make lookup for multihop */
struct neighbor *nbr = p->neigh ?: neigh_find2(&p->p, &src, NULL, 0);
struct neighbor *nbr = p->neigh ?: neigh_find(&p->p, src, NULL, 0);
struct iface *iface = nbr ? nbr->iface : NULL;
if (bgp_channel_is_ipv4(c) && iface && iface->addr4)

4
proto/bgp/packets.c
View File

@ -744,9 +744,9 @@ bgp_apply_next_hop(struct bgp_parse_state *s, rta *a, ip_addr gw, ip_addr ll)
/* GW_DIRECT -> single_hop -> p->neigh != NULL */
if (ipa_nonzero(gw))
nbr = neigh_find2(&p->p, &gw, NULL, 0);
nbr = neigh_find(&p->p, gw, NULL, 0);
else if (ipa_nonzero(ll))
nbr = neigh_find2(&p->p, &ll, p->neigh->iface, 0);
nbr = neigh_find(&p->p, ll, p->neigh->iface, 0);
if (!nbr || (nbr->scope == SCOPE_HOST))
WITHDRAW(BAD_NEXT_HOP);

2
proto/ospf/rt.c
View File

@ -1987,7 +1987,7 @@ again1:
for (nh = nf->n.nhs; nh; nh = nh->next)
if (ipa_nonzero(nh->gw))
{
neighbor *ng = neigh_find2(&p->p, &nh->gw, nh->iface, 0);
neighbor *ng = neigh_find(&p->p, nh->gw, nh->iface, 0);
if (!ng || (ng->scope == SCOPE_HOST))
{ reset_ri(nf); break; }
}

2
proto/rip/packets.c
View File

@ -627,7 +627,7 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
if (ipa_nonzero(rte.next_hop))
{
neighbor *nbr = neigh_find2(&p->p, &rte.next_hop, ifa->iface, 0);
neighbor *nbr = neigh_find(&p->p, rte.next_hop, ifa->iface, 0);
if (!nbr || (nbr->scope <= 0))
rte.next_hop = IPA_NONE;
}

2
proto/rip/rip.c
View File

@ -377,7 +377,7 @@ rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, s
struct rip_neighbor *
rip_get_neighbor(struct rip_proto *p, ip_addr *a, struct rip_iface *ifa)
{
neighbor *nbr = neigh_find2(&p->p, a, ifa->iface, 0);
neighbor *nbr = neigh_find(&p->p, *a, ifa->iface, 0);
if (!nbr || (nbr->scope == SCOPE_HOST) || !rip_iface_link_up(ifa))
return NULL;

7
proto/static/static.c
View File

@ -205,10 +205,9 @@ static_add_rte(struct static_proto *p, struct static_route *r)
for (r2 = r; r2; r2 = r2->mp_next)
{
n = ipa_nonzero(r2->via) ?
neigh_find2(&p->p, &r2->via, r2->iface,
NEF_STICKY | (r2->onlink ? NEF_ONLINK : 0)) :
neigh_find_iface(&p->p, r2->iface);
n = neigh_find(&p->p, r2->via, r2->iface, NEF_STICKY |
(r2->onlink ? NEF_ONLINK : 0) |
(ipa_zero(r2->via) ? NEF_IFACE : 0));
if (!n)
{

8
sysdep/linux/netlink.c
View File

@ -696,8 +696,8 @@ nl_parse_multipath(struct nl_parse_state *s, struct krt_proto *p, struct rtattr
rv->flags |= RNF_ONLINK;
neighbor *nbr;
nbr = neigh_find2(&p->p, &rv->gw, rv->iface,
(rv->flags & RNF_ONLINK) ? NEF_ONLINK : 0);
nbr = neigh_find(&p->p, rv->gw, rv->iface,
(rv->flags & RNF_ONLINK) ? NEF_ONLINK : 0);
if (!nbr || (nbr->scope == SCOPE_HOST))
return NULL;
}
@ -1636,8 +1636,8 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
ra->nh.flags |= RNF_ONLINK;
neighbor *nbr;
nbr = neigh_find2(&p->p, &(ra->nh.gw), ra->nh.iface,
(ra->nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0);
nbr = neigh_find(&p->p, ra->nh.gw, ra->nh.iface,
(ra->nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0);
if (!nbr || (nbr->scope == SCOPE_HOST))
{
log(L_ERR "KRT: Received route %N with strange next-hop %I", net->n.addr,