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node_pcap/examples/speed_server at master · gitqueue/node_pcap · GitHub
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examples
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speed_server
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#!/usr/bin/env node
/*global process require exports setInterval __dirname */
var
util
=
require
(
'util'
)
,
Buffer
=
require
(
"buffer"
)
.
Buffer
,
pcap
=
require
(
"../pcap"
)
,
pcap_session
;
count
=
0
,
start_time
=
new
Date
(
)
,
dns_cache
=
pcap
.
dns_cache
,
tcp_tracker
=
new
pcap
.
TCPTracker
(
)
,
http
=
require
(
'http'
)
,
url
=
require
(
'url'
)
,
path
=
require
(
'path'
)
,
fs
=
require
(
'fs'
)
,
track_ids
=
{
}
,
bulk_data
=
''
;
if
(
process
.
argv
.
length
!==
4
)
{
console
.
error
(
"usage speed_server interface filter"
)
;
console
.
error
(
"Examples: "
)
;
console
.
error
(
' speed_server "" "tcp port 80"'
)
;
console
.
error
(
' speed_server eth1 ""'
)
;
console
.
error
(
' speed_server lo0 "ip proto \\tcp and tcp port 80"'
)
;
process
.
exit
(
1
)
;
}
bulk_data
=
new
Buffer
(
1024
*
1024
)
;
for
(
var
i
=
0
;
i
<
(
1024
*
1024
)
;
i
+=
1
)
{
bulk_data
[
i
]
=
33
;
}
pcap_session
=
pcap
.
createSession
(
process
.
argv
[
2
]
,
process
.
argv
[
3
]
)
;
// Print all devices, currently listening device prefixed with an asterisk
console
.
log
(
"All devices:"
)
;
pcap_session
.
findalldevs
(
)
.
forEach
(
function
(
dev
)
{
if
(
pcap_session
.
device_name
===
dev
.
name
)
{
console
.
log
(
"* "
)
;
}
console
.
log
(
dev
.
name
+
" "
)
;
if
(
dev
.
addresses
.
length
>
0
)
{
dev
.
addresses
.
forEach
(
function
(
address
)
{
console
.
log
(
address
.
addr
+
"/"
+
address
.
netmask
)
;
}
)
;
console
.
log
(
"\n"
)
;
}
else
{
console
.
log
(
"no address\n"
)
;
}
}
)
;
setInterval
(
function
(
)
{
var
stats
=
pcap_session
.
stats
(
)
;
if
(
stats
.
ps_drop
>
0
)
{
console
.
log
(
"pcap dropped packets: "
+
util
.
inspect
(
stats
)
)
;
}
}
,
5000
)
;
tcp_tracker
.
on
(
'start'
,
function
(
session
)
{
console
.
log
(
"Start of TCP session between "
+
session
.
src
+
" and "
+
session
.
dst
)
;
}
)
;
tcp_tracker
.
on
(
'http request'
,
function
(
session
,
http
)
{
var
matches
=
/
s
e
n
d
_
f
i
l
e
\?
i
d
=
(
\d
+
)
/
.
exec
(
http
.
request
.
url
)
;
if
(
matches
&&
matches
[
1
]
)
{
session
.
track_id
=
matches
[
1
]
;
console
.
log
(
"Added tracking for "
+
matches
[
1
]
)
;
}
else
{
console
.
log
(
"Didn't add tracking for "
+
http
.
request
.
url
)
;
}
}
)
;
tcp_tracker
.
on
(
'end'
,
function
(
session
)
{
console
.
log
(
"End of TCP session between "
+
session
.
src
+
" and "
+
session
.
dst
)
;
if
(
session
.
track_id
)
{
track_ids
[
session
.
track_id
]
=
tcp_tracker
.
session_stats
(
session
)
;
}
}
)
;
// listen for packets, decode them, and feed TCP to the tracker
pcap_session
.
on
(
'packet'
,
function
(
raw_packet
)
{
var
packet
=
pcap
.
decode
.
packet
(
raw_packet
)
;
tcp_tracker
.
track_packet
(
packet
)
;
}
)
;
function
lookup_mime_type
(
file_name
)
{
var
mime_types
=
{
html
:
"text/html"
,
txt
:
"text/plain"
,
js
:
"application/javascript"
,
css
:
"text/css"
,
ico
:
"image/x-icon"
,
jpg
:
"image/jpeg"
}
,
index
=
file_name
.
lastIndexOf
(
'.'
)
,
suffix
;
// TODO - use path.extname() here
if
(
index
>
0
&&
index
<
(
file_name
.
length
-
2
)
)
{
suffix
=
file_name
.
substring
(
index
+
1
)
;
if
(
mime_types
[
suffix
]
!==
undefined
)
{
return
mime_types
[
suffix
]
;
}
}
return
"text/plain"
;
}
function
do_error
(
response
,
code
,
message
)
{
console
.
log
(
"do_error: "
+
code
+
" - "
+
message
)
;
response
.
writeHead
(
code
,
{
"Content-Type"
:
"text/plain"
,
"Connection"
:
"close"
}
)
;
response
.
write
(
message
)
;
response
.
end
(
)
;
}
function
handle_file
(
file_name
,
in_request
,
in_response
)
{
var
local_name
=
file_name
.
replace
(
/
^
\/
/
,
__dirname
+
"/"
)
,
file
;
if
(
local_name
.
match
(
/
\/
$
/
)
)
{
local_name
+=
"index.html"
;
}
fs
.
exists
(
local_name
,
function
(
exists
)
{
if
(
exists
)
{
file
=
fs
.
readFile
(
local_name
,
function
(
err
,
data
)
{
var
out_headers
=
{
"Content-Type"
:
lookup_mime_type
(
local_name
)
,
"Content-Length"
:
data
.
length
,
"Connection"
:
"close"
}
;
if
(
err
)
{
do_error
(
in_response
,
404
,
"Error opening "
+
local_name
+
": "
+
err
)
;
return
;
}
if
(
in_request
.
headers
.
origin
)
{
out_headers
[
"access-control-allow-origin"
]
=
in_request
.
headers
.
origin
;
}
in_response
.
writeHead
(
200
,
out_headers
)
;
in_response
.
write
(
data
)
;
in_response
.
end
(
)
;
}
)
;
}
else
{
do_error
(
in_response
,
404
,
local_name
+
" does not exist"
)
;
}
}
)
;
}
function
send_start
(
url
,
request
,
response
)
{
if
(
url
.
query
&&
url
.
query
.
id
)
{
track_ids
[
url
.
query
.
id
]
=
{
}
;
var
out_headers
=
{
"Content-Type"
:
"text/plain"
,
"Content-Length"
:
bulk_data
.
length
,
"Connection"
:
"close"
}
;
response
.
writeHead
(
200
,
out_headers
)
;
response
.
write
(
bulk_data
)
;
response
.
end
(
)
;
}
else
{
do_error
(
response
,
400
,
"Missing id in query string"
)
;
}
}
function
get_stats
(
url
,
request
,
response
)
{
if
(
url
.
query
&&
url
.
query
.
id
)
{
response
.
writeHead
(
200
,
{
"Content-Type"
:
"text/plain"
,
"Connection"
:
"close"
}
)
;
if
(
track_ids
[
url
.
query
.
id
]
)
{
response
.
write
(
JSON
.
stringify
(
track_ids
[
url
.
query
.
id
]
)
)
;
delete
track_ids
[
url
.
query
.
id
]
;
}
else
{
response
.
write
(
JSON
.
stringify
(
{
error
:
"Can't find id in session table"
}
)
)
;
}
response
.
end
(
)
;
}
else
{
do_error
(
response
,
400
,
"Missing id in query string"
)
;
}
}
function
new_client
(
new_request
,
new_response
)
{
console
.
log
(
new_request
.
connection
.
remoteAddress
+
" "
+
new_request
.
method
+
" "
+
new_request
.
url
)
;
if
(
new_request
.
method
===
"GET"
)
{
var
url_parsed
=
url
.
parse
(
new_request
.
url
,
true
)
,
pathname
=
url_parsed
.
pathname
;
switch
(
url_parsed
.
pathname
)
{
case
"/"
:
case
"/index.html"
:
case
"/favicon.ico"
:
case
"/jquery.flot.js"
:
case
"/jquery.js"
:
case
"/jquery.min.js"
:
handle_file
(
pathname
,
new_request
,
new_response
)
;
break
;
case
"/send_file"
:
send_start
(
url_parsed
,
new_request
,
new_response
)
;
break
;
case
"/get_stats"
:
get_stats
(
url_parsed
,
new_request
,
new_response
)
;
break
;
default
:
do_error
(
new_response
,
404
,
"Not found"
)
;
}
}
else
{
do_error
(
new_response
,
404
,
"WTF"
)
;
}
}
http
.
createServer
(
new_client
)
.
listen
(
80
)
;
console
.
log
(
"Listening for HTTP"
)
;
process
.
addListener
(
"uncaughtException"
,
function
(
event
)
{
console
.
log
(
"Uncaught Exception: "
+
event
.
stack
)
;
}
)
;
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