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Jérome Perrin
slapos
Commits
4f0e3348
Commit
4f0e3348
authored
Mar 28, 2013
by
Jondy Zhao
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Plain Diff
Use other interface instead loopback interface in the blackhole route entry.
parent
0f224483
Changes
4
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4 changed files
with
143 additions
and
17 deletions
+143
-17
component/babeld/README.cygwin
component/babeld/README.cygwin
+20
-1
component/babeld/cyginet.c
component/babeld/cyginet.c
+104
-3
component/babeld/cyginet.h
component/babeld/cyginet.h
+2
-0
component/babeld/kernel_cygwin.c
component/babeld/kernel_cygwin.c
+17
-13
No files found.
component/babeld/README.cygwin
View file @
4f0e3348
...
...
@@ -68,4 +68,23 @@ Notes
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters",
but says nothing for Ipv6. Does it work for ipv6 in the registry:
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters"
?
\ No newline at end of file
?
8. There is no RTM_BLACKHOLE, RTM_REJECT, NULLROUTE in the windows, in
the kernel_cygwin.c!kernel_route, we only use local address as
gateway in the BLACKHOLE route entry. Is it OK?
A: It's not OK actually. In the Windows, you can't use 127.0.0.1 as
gateway when add route entry. So the solution is find one
interface other than loopback interface, then use its
uni-address as gateway, it will be a blackhole route entry. For
example, if you have an interface which ip addr is
192.168.128.100, and ifindex is 5, then
$ route add 100.28.0.0 mask 255.255.0.0 192.168.128.100 if 5
Destination network 100.28.0.0/16 will be unreachable.
9. IN6_LINKLOCAL_IFINDEX && SET_IN6_LINKLOCAL_IFINDEX, do both of them
work in the Windows?
\ No newline at end of file
component/babeld/cyginet.c
View file @
4f0e3348
...
...
@@ -229,6 +229,15 @@ libwinet_refresh_interface_map_table()
return
(
NO_ERROR
==
dwRet
);
}
/* Map ifindex belong to family to index of another family,
Ipv4 -> Ipv6 or
Ipv6 -> Ipv4
Return 0, if the interface only binds one ip version.
Special case:
If the interface is loopback, it will always return 1.
*/
static
int
libwinet_map_ifindex
(
int
family
,
int
ifindex
)
{
...
...
@@ -239,7 +248,8 @@ libwinet_map_ifindex(int family, int ifindex)
DWORD
dwReturn
=
0
;
dwRet
=
GetAdaptersAddresses
(
AF_UNSPEC
,
GAA_FLAG_SKIP_ANYCAST
\
GAA_FLAG_SKIP_UNICAST
\
|
GAA_FLAG_SKIP_ANYCAST
\
|
GAA_FLAG_SKIP_MULTICAST
\
|
GAA_FLAG_SKIP_DNS_SERVER
\
|
GAA_FLAG_SKIP_FRIENDLY_NAME
,
...
...
@@ -252,7 +262,8 @@ libwinet_map_ifindex(int family, int ifindex)
if
(
NULL
==
(
pAdaptAddr
=
(
IP_ADAPTER_ADDRESSES
*
)
MALLOC
(
dwSize
)))
return
0
;
dwRet
=
GetAdaptersAddresses
(
AF_UNSPEC
,
GAA_FLAG_SKIP_ANYCAST
\
GAA_FLAG_SKIP_UNICAST
\
|
GAA_FLAG_SKIP_ANYCAST
\
|
GAA_FLAG_SKIP_MULTICAST
\
|
GAA_FLAG_SKIP_DNS_SERVER
\
|
GAA_FLAG_SKIP_FRIENDLY_NAME
,
...
...
@@ -268,7 +279,8 @@ libwinet_map_ifindex(int family, int ifindex)
while
(
pTmpAdaptAddr
)
{
if
(
family
==
AF_INET
?
pTmpAdaptAddr
->
IfIndex
==
ifindex
:
pTmpAdaptAddr
->
Ipv6IfIndex
==
ifindex
)
{
dwReturn
=
family
==
AF_INET
?
dwReturn
=
(
pTmpAdaptAddr
->
IfType
==
IF_TYPE_SOFTWARE_LOOPBACK
)
?
1
:
(
family
==
AF_INET
)
?
pTmpAdaptAddr
->
Ipv6IfIndex
:
pTmpAdaptAddr
->
IfIndex
;
break
;
}
...
...
@@ -750,6 +762,76 @@ int cyginet_stop_monitor_route_changes()
return
rc
;
}
/* Find an interface which binds both of ipv4 and ipv6, and configured
with at least one unicast address.
Return ipv6 ifindex of this interface, set addr6 and addr as the
ipv4 and ipv6 address respectively.
Return 0 if there is no matched interface found.
*/
int
cyginet_blackhole_index
(
struct
in6_addr
*
addr6
,
char
*
addr
)
{
IP_ADAPTER_ADDRESSES
*
pAdaptAddr
=
NULL
;
IP_ADAPTER_ADDRESSES
*
pTmpAdaptAddr
=
NULL
;
DWORD
dwRet
=
0
;
DWORD
dwSize
=
0x10000
;
DWORD
dwReturn
=
0
;
dwRet
=
GetAdaptersAddresses
(
AF_UNSPEC
,
GAA_FLAG_SKIP_ANYCAST
\
|
GAA_FLAG_SKIP_MULTICAST
\
|
GAA_FLAG_SKIP_DNS_SERVER
\
|
GAA_FLAG_SKIP_FRIENDLY_NAME
,
NULL
,
pAdaptAddr
,
&
dwSize
);
if
(
ERROR_BUFFER_OVERFLOW
==
dwRet
)
{
FREE
(
pAdaptAddr
);
if
(
NULL
==
(
pAdaptAddr
=
(
IP_ADAPTER_ADDRESSES
*
)
MALLOC
(
dwSize
)))
return
0
;
dwRet
=
GetAdaptersAddresses
(
AF_UNSPEC
,
GAA_FLAG_SKIP_ANYCAST
\
|
GAA_FLAG_SKIP_MULTICAST
\
|
GAA_FLAG_SKIP_DNS_SERVER
\
|
GAA_FLAG_SKIP_FRIENDLY_NAME
,
NULL
,
pAdaptAddr
,
&
dwSize
);
}
if
(
NO_ERROR
==
dwRet
)
{
pTmpAdaptAddr
=
pAdaptAddr
;
while
(
pTmpAdaptAddr
)
{
if
(
pTmpAdaptAddr
->
IfIndex
&&
pTmpAdaptAddr
->
Ipv6IfIndex
&&
(
pTmpAdaptAddr
->
OperStatus
==
IfOperStatusUp
)
&&
(
pTmpAdaptAddr
->
IfType
!=
IF_TYPE_SOFTWARE_LOOPBACK
))
{
PIP_ADAPTER_UNICAST_ADDRESS
p
=
pTmpAdaptAddr
->
FirstUnicastAddress
;
while
(
p
)
{
SOCKADDR
*
s
;
s
=
(
p
->
Address
).
lpSockaddr
;
if
(
s
->
sa_family
==
AF_INET
)
memcpy
(
addr
,
&
(((
struct
sockaddr_in
*
)
s
)
->
sin_addr
),
4
);
else
if
(
s
->
sa_family
==
AF_INET6
)
memcpy
(
addr6
,
&
(((
struct
sockaddr_in6
*
)
s
)
->
sin6_addr
),
16
);
p
=
p
->
Next
;
}
dwReturn
=
pTmpAdaptAddr
->
Ipv6IfIndex
;
break
;
}
pTmpAdaptAddr
=
pTmpAdaptAddr
->
Next
;
}
FREE
(
pAdaptAddr
);
}
return
dwReturn
;
}
/*
* There are 3 ways to change a route:
*
...
...
@@ -759,6 +841,16 @@ int cyginet_stop_monitor_route_changes()
* DeleteIpForwardEntry
* SetIpForwardEntry
*
* Or route command
*
* Or netsh routing add persistentroute
*
* Or netsh routing add rtmroute
*
* it need "Routing and Remote Access Service" running on the local
* machine. Use 'net start remoteaccess' on the local machine to
* start the service.
*
* 2. IPv6 route: command "netsh"
*
* C:/> netsh interface ipv6 add route
...
...
@@ -2366,6 +2458,15 @@ runTestCases()
}
}
printf
(
"
\n\n
Test cyginet_blackhole_index:
\n\n
"
);
{
struct
in6_addr
addr6
;
char
addr
[
4
];
printf
(
"The blackhole ifindex is %d
\n
"
,
cyginet_blackhole_index
(
&
addr6
,
addr
)
);
}
#if _WIN32_WINNT < _WIN32_WINNT_VISTA
printf
(
"
\n\n
Test libwinet_dump_ipv6_route_table:
\n\n
"
);
...
...
component/babeld/cyginet.h
View file @
4f0e3348
...
...
@@ -176,4 +176,6 @@ char * cyginet_ifname(const char *);
char
*
cyginet_guidname
(
const
char
*
);
char
*
cyginet_ipv4_index2ifname
(
int
);
int
cyginet_blackhole_index
(
struct
in6_addr
*
,
char
*
);
#endif
/* __CYGIFNET_H__ */
component/babeld/kernel_cygwin.c
View file @
4f0e3348
...
...
@@ -69,6 +69,12 @@ static int get_sdl(struct sockaddr_dl *sdl, char *guidname);
static
const
unsigned
char
v4prefix
[
16
]
=
{
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0
,
0xFF
,
0xFF
,
0
,
0
,
0
,
0
};
static
int
ifindex_blackhole
=
-
1
;
static
struct
in6_addr
blackhole_addr6
=
{{
IN6ADDR_LOOPBACK_INIT
}};
static
char
blackhole_addr
[
1
][
1
][
16
]
=
{{{
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x7f
,
0x00
,
0x00
,
0x01
}}};
int
export_table
=
-
1
,
import_table
=
-
1
;
int
...
...
@@ -355,11 +361,6 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
int
route_ifindex
;
int
prefix_len
;
struct
in6_addr
local6
=
{{
IN6ADDR_LOOPBACK_INIT
}};
char
local4
[
1
][
1
][
16
]
=
{{{
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x00
,
0x7f
,
0x00
,
0x00
,
0x01
}}};
/* Check that the protocol family is consistent. */
if
(
plen
>=
96
&&
v4mapped
(
dest
))
{
if
(
!
v4mapped
(
gate
))
{
...
...
@@ -413,11 +414,14 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
if
(
metric
==
KERNEL_INFINITY
)
{
/* RTF_BLACKHOLE; */
/* ==> Set gateway to an unused ip address in the Windows */
if
(
ifindex_lo
<
0
)
{
ifindex_lo
=
cyginet_loopback_index
(
AF_UNSPEC
);
if
(
ifindex_lo
<=
0
)
if
(
ifindex_blackhole
<
0
)
{
ifindex_blackhole
=
cyginet_blackhole_index
(
&
blackhole_addr6
,
blackhole_addr
[
0
][
0
]
+
12
);
if
(
ifindex_blackhole
<=
0
)
return
-
1
;
}
route_ifindex
=
ifindex_blackhole
;
}
#define PUSHADDR(dst, src) \
...
...
@@ -438,20 +442,20 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
PUSHADDR
(
destination
,
dest
);
if
(
metric
==
KERNEL_INFINITY
)
PUSHADDR
(
gateway
,
**
local4
);
PUSHADDR
(
gateway
,
**
blackhole_addr
);
else
PUSHADDR
(
gateway
,
gate
);
}
else
{
PUSHADDR6
(
destination
,
dest
);
if
(
metric
==
KERNEL_INFINITY
)
PUSHADDR6
(
gateway
,
&
local
6
);
PUSHADDR6
(
gateway
,
&
blackhole_addr
6
);
else
PUSHADDR6
(
gateway
,
gate
);
}
#undef PUSHADDR
#undef PUSHADDR6
/* What if route_ifindex == 0 */
switch
(
operation
)
{
case
ROUTE_FLUSH
:
rc
=
cyginet_delete_route_entry
(
&
destination
,
...
...
@@ -484,8 +488,8 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
/* Monitor thread will write data to kernel pipe when any change
in the route table is happened. Here it's babeld itself to
change the route table, so kernel pipe need to be clean. */
int
ch
;
while
(
read
(
kernel_pipe_handles
[
0
],
&
ch
,
1
)
>
0
);
/* int ch; */
/* while (read(kernel_pipe_handles[0], &ch, 1) > 0); */
return
rc
;
}
...
...
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