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nexedi
babeld
Commits
16cf94d6
Commit
16cf94d6
authored
Sep 03, 2013
by
Baptiste Jonglez
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Keep track of timestamps on incoming Hello messages
parent
6a0f4f73
Changes
3
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Showing
3 changed files
with
55 additions
and
0 deletions
+55
-0
message.c
message.c
+48
-0
neighbour.c
neighbour.c
+2
-0
neighbour.h
neighbour.h
+5
-0
No files found.
message.c
View file @
16cf94d6
...
@@ -166,6 +166,48 @@ parse_route_attributes(const unsigned char *a, int alen,
...
@@ -166,6 +166,48 @@ parse_route_attributes(const unsigned char *a, int alen,
}
}
}
}
static
int
parse_hello_subtlv
(
const
unsigned
char
*
a
,
int
alen
,
struct
neighbour
*
neigh
)
{
int
type
,
len
,
i
=
0
,
ret
=
0
;
while
(
i
<
alen
)
{
type
=
a
[
0
];
if
(
type
==
SUBTLV_PAD1
)
{
i
++
;
continue
;
}
if
(
i
+
1
>
alen
)
{
fprintf
(
stderr
,
"Received truncated sub-TLV on Hello message.
\n
"
);
return
-
1
;
}
len
=
a
[
i
+
1
];
if
(
i
+
len
>
alen
)
{
fprintf
(
stderr
,
"Received truncated sub-TLV on Hello message.
\n
"
);
return
-
1
;
}
if
(
type
==
SUBTLV_PADN
)
{
/* Nothing to do. */
}
else
if
(
type
==
SUBTLV_TIMESTAMP
)
{
if
(
len
>=
4
)
{
DO_NTOHL
(
neigh
->
hello_send_us
,
a
+
i
+
2
);
neigh
->
hello_rtt_receive_time
=
now
;
ret
=
1
;
}
else
{
fprintf
(
stderr
,
"Received incorrect RTT sub-TLV on Hello message.
\n
"
);
}
}
else
{
fprintf
(
stderr
,
"Received unknown Hello sub-TLV type %d.
\n
"
,
type
);
}
i
+=
len
+
2
;
}
return
ret
;
}
static
int
static
int
network_address
(
int
ae
,
const
unsigned
char
*
a
,
unsigned
int
len
,
network_address
(
int
ae
,
const
unsigned
char
*
a
,
unsigned
int
len
,
unsigned
char
*
a_r
)
unsigned
char
*
a_r
)
...
@@ -194,6 +236,9 @@ parse_packet(const unsigned char *from, struct interface *ifp,
...
@@ -194,6 +236,9 @@ parse_packet(const unsigned char *from, struct interface *ifp,
unsigned
char
router_id
[
8
],
v4_prefix
[
16
],
v6_prefix
[
16
],
unsigned
char
router_id
[
8
],
v4_prefix
[
16
],
v6_prefix
[
16
],
v4_nh
[
16
],
v6_nh
[
16
];
v4_nh
[
16
],
v6_nh
[
16
];
/* We want to track exactly when we received this packet. */
gettime
(
&
now
);
if
(
!
linklocal
(
from
))
{
if
(
!
linklocal
(
from
))
{
fprintf
(
stderr
,
"Received packet from non-local address %s.
\n
"
,
fprintf
(
stderr
,
"Received packet from non-local address %s.
\n
"
,
format_address
(
from
));
format_address
(
from
));
...
@@ -276,6 +321,9 @@ parse_packet(const unsigned char *from, struct interface *ifp,
...
@@ -276,6 +321,9 @@ parse_packet(const unsigned char *from, struct interface *ifp,
if
(
interval
>
0
)
if
(
interval
>
0
)
/* Multiply by 3/2 to allow hellos to expire. */
/* Multiply by 3/2 to allow hellos to expire. */
schedule_neighbours_check
(
interval
*
15
,
0
);
schedule_neighbours_check
(
interval
*
15
,
0
);
/* Sub-TLV handling. */
if
(
len
>
8
)
parse_hello_subtlv
(
message
+
8
,
len
-
6
,
neigh
);
}
else
if
(
type
==
MESSAGE_IHU
)
{
}
else
if
(
type
==
MESSAGE_IHU
)
{
unsigned
short
txcost
,
interval
;
unsigned
short
txcost
,
interval
;
unsigned
char
address
[
16
];
unsigned
char
address
[
16
];
...
...
neighbour.c
View file @
16cf94d6
...
@@ -97,6 +97,8 @@ find_neighbour(const unsigned char *address, struct interface *ifp)
...
@@ -97,6 +97,8 @@ find_neighbour(const unsigned char *address, struct interface *ifp)
neigh
->
hello_time
=
zero
;
neigh
->
hello_time
=
zero
;
neigh
->
hello_interval
=
0
;
neigh
->
hello_interval
=
0
;
neigh
->
ihu_interval
=
0
;
neigh
->
ihu_interval
=
0
;
neigh
->
hello_send_us
=
0
;
neigh
->
hello_rtt_receive_time
=
zero
;
neigh
->
ifp
=
ifp
;
neigh
->
ifp
=
ifp
;
neigh
->
next
=
neighs
;
neigh
->
next
=
neighs
;
neighs
=
neigh
;
neighs
=
neigh
;
...
...
neighbour.h
View file @
16cf94d6
...
@@ -31,6 +31,11 @@ struct neighbour {
...
@@ -31,6 +31,11 @@ struct neighbour {
struct
timeval
ihu_time
;
struct
timeval
ihu_time
;
unsigned
short
hello_interval
;
/* in centiseconds */
unsigned
short
hello_interval
;
/* in centiseconds */
unsigned
short
ihu_interval
;
/* in centiseconds */
unsigned
short
ihu_interval
;
/* in centiseconds */
/* Used for RTT estimation. */
/* Absolute time (modulo 2^32) at which the Hello was sent,
according to remote clock. */
unsigned
int
hello_send_us
;
struct
timeval
hello_rtt_receive_time
;
struct
interface
*
ifp
;
struct
interface
*
ifp
;
};
};
...
...
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