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nexedi
babeld
Commits
c99109be
Commit
c99109be
authored
Mar 13, 2008
by
Juliusz Chroboczek
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Rewrite handle_request.
parent
78877d2b
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1
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34 deletions
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-34
message.c
message.c
+32
-34
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message.c
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c99109be
...
...
@@ -247,6 +247,7 @@ handle_request(struct neighbour *neigh, const unsigned char *prefix,
{
struct
xroute
*
xroute
;
struct
route
*
route
;
struct
neighbour
*
successor
=
NULL
;
xroute
=
find_xroute
(
prefix
,
plen
);
if
(
xroute
)
{
...
...
@@ -264,45 +265,42 @@ handle_request(struct neighbour *neigh, const unsigned char *prefix,
}
route
=
find_installed_route
(
prefix
,
plen
);
if
(
route
&&
(
hop_count
==
0
||
(
route
->
metric
<
INFINITY
&&
(
router_hash
!=
hash_id
(
route
->
src
->
address
)
||
seqno_compare
(
seqno
,
route
->
seqno
)
<=
0
))))
{
/* We can satisfy this request straight away. Note that in the
hop_count=0 case, we do send a recent retraction, in order to
reply to nodes whose routes are about to expire. */
send_update
(
neigh
->
network
,
1
,
prefix
,
plen
);
return
;
}
if
(
hop_count
>
0
&&
(
!
route
||
route
->
metric
>=
INFINITY
||
(
router_hash
==
hash_id
(
route
->
src
->
address
)
&&
seqno_compare
(
seqno
,
route
->
seqno
)
>
0
)))
{
/* No route, or the route we have is not fresh enough. */
if
(
hop_count
>
1
)
{
struct
neighbour
*
successor
=
NULL
;
if
(
route
&&
route
->
metric
<
INFINITY
)
successor
=
route
->
neigh
;
if
(
!
successor
||
successor
==
neigh
)
{
struct
route
*
other_route
;
/* We're about to forward a request to the requestor.
Try to find a different neighbour to forward the
request to. */
other_route
=
find_best_route
(
prefix
,
plen
,
0
,
neigh
);
if
(
other_route
&&
other_route
->
metric
<
INFINITY
)
successor
=
other_route
->
neigh
;
}
if
(
hop_count
<=
1
)
return
;
if
(
!
successor
||
successor
==
neigh
)
/* Give up */
return
;
/* Let's forward this request. */
if
(
route
&&
route
->
metric
<
INFINITY
)
successor
=
route
->
neigh
;
send_unicast_request
(
successor
,
prefix
,
plen
,
hop_count
-
1
,
seqno
,
router_hash
);
record_request
(
prefix
,
plen
,
seqno
,
router_hash
,
neigh
->
network
,
0
);
}
return
;
if
(
!
successor
||
successor
==
neigh
)
{
struct
route
*
other_route
;
/* We're about to forward a request to the requestor. Try to
find a different neighbour to forward the request to. */
other_route
=
find_best_route
(
prefix
,
plen
,
0
,
neigh
);
if
(
other_route
&&
other_route
->
metric
<
INFINITY
)
successor
=
other_route
->
neigh
;
}
/* We do send replies for recently retracted routes, to satisfy
nodes whose routes are about to expire. */
if
(
route
)
send_update
(
neigh
->
network
,
1
,
prefix
,
plen
);
if
(
!
successor
||
successor
==
neigh
)
/* Give up */
return
;
send_unicast_request
(
successor
,
prefix
,
plen
,
hop_count
-
1
,
seqno
,
router_hash
);
record_request
(
prefix
,
plen
,
seqno
,
router_hash
,
neigh
->
network
,
0
);
}
...
...
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