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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
提交
e482b569
编写于
10月 05, 2016
作者:
P
Péter Szilágyi
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
eth: monitor malicious header retrieval requests
上级
a7cc3248
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
31 addition
and
5 deletion
+31
-5
eth/handler.go
eth/handler.go
+16
-5
eth/handler_test.go
eth/handler_test.go
+15
-0
未找到文件。
eth/handler.go
浏览文件 @
e482b569
...
...
@@ -17,6 +17,7 @@
package
eth
import
(
"encoding/json"
"errors"
"fmt"
"math"
...
...
@@ -371,14 +372,24 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
}
case
query
.
Origin
.
Hash
!=
(
common
.
Hash
{})
&&
!
query
.
Reverse
:
// Hash based traversal towards the leaf block
if
header
:=
pm
.
blockchain
.
GetHeaderByNumber
(
origin
.
Number
.
Uint64
()
+
query
.
Skip
+
1
);
header
!=
nil
{
if
pm
.
blockchain
.
GetBlockHashesFromHash
(
header
.
Hash
(),
query
.
Skip
+
1
)[
query
.
Skip
]
==
query
.
Origin
.
Hash
{
query
.
Origin
.
Hash
=
header
.
Hash
()
var
(
current
=
origin
.
Number
.
Uint64
()
next
=
current
+
query
.
Skip
+
1
)
if
next
<=
current
{
infos
,
_
:=
json
.
MarshalIndent
(
p
.
Peer
.
Info
(),
""
,
" "
)
glog
.
V
(
logger
.
Warn
)
.
Infof
(
"%v: GetBlockHeaders skip overflow attack (current %v, skip %v, next %v)
\n
Malicious peer infos: %s"
,
p
,
current
,
query
.
Skip
,
next
,
infos
)
unknown
=
true
}
else
{
if
header
:=
pm
.
blockchain
.
GetHeaderByNumber
(
next
);
header
!=
nil
{
if
pm
.
blockchain
.
GetBlockHashesFromHash
(
header
.
Hash
(),
query
.
Skip
+
1
)[
query
.
Skip
]
==
query
.
Origin
.
Hash
{
query
.
Origin
.
Hash
=
header
.
Hash
()
}
else
{
unknown
=
true
}
}
else
{
unknown
=
true
}
}
else
{
unknown
=
true
}
case
query
.
Reverse
:
// Number based traversal towards the genesis block
...
...
eth/handler_test.go
浏览文件 @
e482b569
...
...
@@ -17,6 +17,7 @@
package
eth
import
(
"math"
"math/big"
"math/rand"
"testing"
...
...
@@ -173,6 +174,20 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
pm
.
blockchain
.
GetBlockByNumber
(
0
)
.
Hash
(),
},
},
// Check a corner case where skipping overflow loops back into the chain start
{
&
getBlockHeadersData
{
Origin
:
hashOrNumber
{
Hash
:
pm
.
blockchain
.
GetBlockByNumber
(
3
)
.
Hash
()},
Amount
:
2
,
Reverse
:
false
,
Skip
:
math
.
MaxUint64
-
1
},
[]
common
.
Hash
{
pm
.
blockchain
.
GetBlockByNumber
(
3
)
.
Hash
(),
},
},
// Check a corner case where skipping overflow loops back to the same header
{
&
getBlockHeadersData
{
Origin
:
hashOrNumber
{
Hash
:
pm
.
blockchain
.
GetBlockByNumber
(
1
)
.
Hash
()},
Amount
:
2
,
Reverse
:
false
,
Skip
:
math
.
MaxUint64
},
[]
common
.
Hash
{
pm
.
blockchain
.
GetBlockByNumber
(
1
)
.
Hash
(),
},
},
// Check that non existing headers aren't returned
{
&
getBlockHeadersData
{
Origin
:
hashOrNumber
{
Hash
:
unknown
},
Amount
:
1
},
...
...
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