Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
L
linux
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Commits
Issue Boards
Open sidebar
Kirill Smelkov
linux
Commits
d12e5047
Commit
d12e5047
authored
Sep 27, 2004
by
Patrick McHardy
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
[NETFILTER]: Convert sctp match to skb_header_pointer
Signed-off-by:
Patrick McHardy
<
kaber@trash.net
>
parent
d8676c77
Changes
1
Show whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
18 additions
and
16 deletions
+18
-16
net/ipv4/netfilter/ipt_sctp.c
net/ipv4/netfilter/ipt_sctp.c
+18
-16
No files found.
net/ipv4/netfilter/ipt_sctp.c
View file @
d12e5047
...
...
@@ -42,7 +42,7 @@ match_packet(const struct sk_buff *skb,
{
int
offset
;
u_int32_t
chunkmapcopy
[
256
/
sizeof
(
u_int32_t
)];
sctp_chunkhdr_t
sch
;
sctp_chunkhdr_t
_sch
,
*
sch
;
#ifdef DEBUG_SCTP
int
i
=
0
;
...
...
@@ -54,38 +54,39 @@ match_packet(const struct sk_buff *skb,
offset
=
skb
->
nh
.
iph
->
ihl
*
4
+
sizeof
(
sctp_sctphdr_t
);
do
{
if
(
skb_copy_bits
(
skb
,
offset
,
&
sch
,
sizeof
(
sch
))
<
0
)
{
sch
=
skb_header_pointer
(
skb
,
offset
,
sizeof
(
_sch
),
&
_sch
);
if
(
sch
==
NULL
)
{
duprintf
(
"Dropping invalid SCTP packet.
\n
"
);
*
hotdrop
=
1
;
return
0
;
}
duprintf
(
"Chunk num: %d
\t
offset: %d
\t
type: %d
\t
length: %d
\t
flags: %x
\n
"
,
++
i
,
offset
,
sch
.
type
,
htons
(
sch
.
length
),
sch
.
flags
);
++
i
,
offset
,
sch
->
type
,
htons
(
sch
->
length
),
sch
->
flags
);
offset
+=
(
htons
(
sch
.
length
)
+
3
)
&
~
3
;
offset
+=
(
htons
(
sch
->
length
)
+
3
)
&
~
3
;
duprintf
(
"skb->len: %d
\t
offset: %d
\n
"
,
skb
->
len
,
offset
);
if
(
SCTP_CHUNKMAP_IS_SET
(
chunkmap
,
sch
.
type
))
{
if
(
SCTP_CHUNKMAP_IS_SET
(
chunkmap
,
sch
->
type
))
{
switch
(
chunk_match_type
)
{
case
SCTP_CHUNK_MATCH_ANY
:
if
(
match_flags
(
flag_info
,
flag_count
,
sch
.
type
,
sch
.
flags
))
{
sch
->
type
,
sch
->
flags
))
{
return
1
;
}
break
;
case
SCTP_CHUNK_MATCH_ALL
:
if
(
match_flags
(
flag_info
,
flag_count
,
sch
.
type
,
sch
.
flags
))
{
SCTP_CHUNKMAP_CLEAR
(
chunkmapcopy
,
sch
.
type
);
sch
->
type
,
sch
->
flags
))
{
SCTP_CHUNKMAP_CLEAR
(
chunkmapcopy
,
sch
->
type
);
}
break
;
case
SCTP_CHUNK_MATCH_ONLY
:
if
(
!
match_flags
(
flag_info
,
flag_count
,
sch
.
type
,
sch
.
flags
))
{
sch
->
type
,
sch
->
flags
))
{
return
0
;
}
break
;
...
...
@@ -120,7 +121,7 @@ match(const struct sk_buff *skb,
int
*
hotdrop
)
{
const
struct
ipt_sctp_info
*
info
;
sctp_sctphdr_t
sh
;
sctp_sctphdr_t
_sh
,
*
sh
;
info
=
(
const
struct
ipt_sctp_info
*
)
matchinfo
;
...
...
@@ -129,18 +130,19 @@ match(const struct sk_buff *skb,
return
0
;
}
if
(
skb_copy_bits
(
skb
,
skb
->
nh
.
iph
->
ihl
*
4
,
&
sh
,
sizeof
(
sh
))
<
0
)
{
sh
=
skb_header_pointer
(
skb
,
skb
->
nh
.
iph
->
ihl
*
4
,
sizeof
(
_sh
),
&
_sh
);
if
(
sh
==
NULL
)
{
duprintf
(
"Dropping evil TCP offset=0 tinygram.
\n
"
);
*
hotdrop
=
1
;
return
0
;
}
duprintf
(
"spt: %d
\t
dpt: %d
\n
"
,
ntohs
(
sh
.
source
),
ntohs
(
sh
.
dest
));
duprintf
(
"spt: %d
\t
dpt: %d
\n
"
,
ntohs
(
sh
->
source
),
ntohs
(
sh
->
dest
));
return
SCCHECK
(((
ntohs
(
sh
.
source
)
>=
info
->
spts
[
0
])
&&
(
ntohs
(
sh
.
source
)
<=
info
->
spts
[
1
])),
return
SCCHECK
(((
ntohs
(
sh
->
source
)
>=
info
->
spts
[
0
])
&&
(
ntohs
(
sh
->
source
)
<=
info
->
spts
[
1
])),
IPT_SCTP_SRC_PORTS
,
info
->
flags
,
info
->
invflags
)
&&
SCCHECK
(((
ntohs
(
sh
.
dest
)
>=
info
->
dpts
[
0
])
&&
(
ntohs
(
sh
.
dest
)
<=
info
->
dpts
[
1
])),
&&
SCCHECK
(((
ntohs
(
sh
->
dest
)
>=
info
->
dpts
[
0
])
&&
(
ntohs
(
sh
->
dest
)
<=
info
->
dpts
[
1
])),
IPT_SCTP_DEST_PORTS
,
info
->
flags
,
info
->
invflags
)
&&
SCCHECK
(
match_packet
(
skb
,
info
->
chunkmap
,
info
->
chunk_match_type
,
info
->
flag_info
,
info
->
flag_count
,
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment