Thanks Ian!
Can you please give some suggestion on how to properly handle this issue?
The C++ API cannot be modified.
Sincerely,
Chun
On Monday, November 6, 2017 at 3:25:13 PM UTC-5, Ian Lance Taylor wrote:
>
> On Mon, Nov 6, 2017 at 10:59 AM, Chun Zhang > wrote:
> >
>
Hi,
The configuration is the structure defined as
type Configuration struct {
IpToSend string
PortToSend string
Device string
}
The json file is
{
"IpToSend" :"",
"PortToSend" :"2075",
"Device" : "eth1"
}
The output of fmt.Sprintf("%T %#v", conf, con
oding the value
and retrieving it from the json file. Can you please help me to understand
it?
Thanks,
Chun
On Monday, November 6, 2017 at 1:44:54 PM UTC-5, Ian Lance Taylor wrote:
>
> On Mon, Nov 6, 2017 at 10:29 AM, Chun Zhang > wrote:
> > Thank you Ian!! That does make sense.
&
Thank you Ian!! That does make sense.
Can you please elaborate why hardcoding device = "eth1" works? What is the
difference here?
Sincerely,
Chun
On Mon, Nov 6, 2017 at 1:19 PM, Ian Lance Taylor wrote:
> On Mon, Nov 6, 2017 at 4:25 AM, Chun Zhang wrote:
> >
> >
Best,
Chun
On Monday, November 6, 2017 at 1:07:46 AM UTC-5, Tamás Gulácsi wrote:
>
>
> 2017. november 6., hétfő 2:11:48 UTC+1 időpontban Chun Zhang a következőt
> írta:
>>
>> Hi, All,
>>
>> I am trying to read a configuration file using Viper, the config fil
Hi, All,
I am trying to read a configuration file using Viper, the config file is a
very simple json file with one line
{
"device" : "eth1"
}
I use the following line to read it
device := viper.GetString("device")
then passing this var further into a C library with swig generated api as
ar
Hi, Jan,
Thank you very much!!
Best,
Chun
On Sunday, November 5, 2017 at 4:17:43 PM UTC-5, Jan Mercl wrote:
>
> On Sun, Nov 5, 2017 at 10:09 PM Chun Zhang > wrote:
>
> > I have a group of integers ranging from 1 to 2^32 that are in the format
> of uint32.
>
> A
Hi, All,
I have a group of integers ranging from 1 to 2^32 that are in the format of
uint32. I know strconv.Itoa(i) or strconv.FormatUint(i) can definitely give
unique representation of each number. So, I can use it as the index of a
map[string]interface{}.
However, I am wondering if I use st
I just figured this out. I need to manually set the NIC to promiscuous
mode.
Now the question is, is there a way to set the NIC to promiscuous mode in
code, like in pcap.openlive?? I don't see that option with AF_packet.
Thanks,
Chun
On Tuesday, October 17, 2017 at 6:31:21 PM UTC-4,
Hi, friends,
I am trying to create a very simple network sniffer. Initially I
implemented it with libpcap, but I got not only performance issue, but also
timing issue. Now I am trying to replace libpcap with afpacket. However, I
am not able to get any packet from the GRE tunneled terminated a
hether understand your need, but if your need is the reassembly
> of TCP packets, you can use the tcpassembly packet in gopacket, I recently
> used it in my traffic replay project tcplayer
> <https://github.com/feilengcui008/tcplayer>, it seems working just fine.
>
> 在 2017年7
Hi, All,
I am trying to write a small program to sniff packets off the wire. These
packets are most TCP flows, so I'd expect SYN arrives earlier than SYN-ACK,
ACK etc.
I used gopacket and basically followed the official guide to get the packet
and then read its metadata for timing. But to my
omponents to find
> more granular code bottlenecks.
>
> On Fri, Jun 9, 2017, 09:47 Chun Zhang >
> wrote:
>
>> Hi, All,
>>
>> Update on this issue. Based on the suggestion I got earlier, I dedicated
>> one thread, which is locked to a os thread to handl
Decoding Packets Faster
http://www.devdungeon.com/content/packet-capture-injection-and-analysis-gopacket
I am wondering what further optimization can I do to speed this up?
Thanks,
Chun
On Tuesday, May 30, 2017 at 10:50:50 AM UTC-4, Chun Zhang wrote:
>
> Thank you Rajanikanth, Kevin an
Hi, All,
I have some piece of code with very high cpu usage, logging is actually
pretty cpu intensive, so I tried to turn it off as follows,
type myLog struct {
*log.Logger
enable bool
}
func (l *myLog) Println(v ...interface{}) {
if l.enable == true {
l.Out
Unfortunately it does not give any info. :(
Thanks,
Chun
On Saturday, June 3, 2017 at 1:16:18 PM UTC-4, Egon wrote:
>
> Does race detector say something useful?
>
> On Friday, 2 June 2017 21:18:31 UTC+3, Chun Zhang wrote:
>>
>> I am trying to store some complicated data s
Hi, Tamas,
Thanks for the reply!
The key is a string for my current use.
After the data v is retrieved, it is compared with a new data coming from
the wire. And then based on the comparison, the new data, which is a newly
created piece of memory contains same type of data, will be sent to a C
I am trying to store some complicated data structure with a map, and
eventually search and use it.
Since the structure can change with different applications, and it has to
work with multiple thread, I defined a generic map like follows
type IndexedMap struct {
sync.RWMutex
Data
Thank you Rajanikanth, Kevin and Egon! I will explore the ideas you guys
provided and keep you updated.
Best Regards,
Chun
On Sunday, May 28, 2017 at 2:25:03 AM UTC-4, Egon wrote:
>
>
>
> On Saturday, 27 May 2017 14:05:11 UTC+3, Chun Zhang wrote:
>>
>> Thanks Kevin an
istics like a file or syslog over UDP.
>
> On Fri, May 26, 2017 at 3:59 PM Egon >
> wrote:
>
>> On Friday, 26 May 2017 20:51:55 UTC+3, Chun Zhang wrote:
>>>
>>> Good point.
>>> as a comparison: tcpdump -w /dev/null can handle up to 750Mbps, where
>
hub.com/miekg/pcap
>
> + Egon
>
> On Friday, 26 May 2017 19:01:20 UTC+3, Chun Zhang wrote:
>>
>> Hi, All,
>>
>> I am trying to write a small program to handle packets coming from a GigE
>> wire. The testing code snip is as below.
>>
>> The proble
Hi, All,
I am trying to write a small program to handle packets coming from a GigE
wire. The testing code snip is as below.
The problem I am facing is that this is extremely slow, can only handle up
to 250Mbps-ish traffic with normal ipv4 sized packets, anything above that
resulting signific
Hi, all,
I am trying to capture a GRE tunneled packet and get rid off the GRE header
to retrieve the encapsulated packet.
The code is quite simple, I basically grabs the GRE tunneled packet and
build a new one from its payload. The problem I have here is the MetaData
of the packet1 channel is
Quick update:
The issue was resolved after a `go clean`...
Now everything build just as if the directives are passed through the CLI.
I don't know what happened...
Thank all for your help!
On Tuesday, February 28, 2017 at 2:06:20 PM UTC-5, Chun Zhang wrote:
>
> Hi, All,
>
&g
; to see how go would invoke "link"
>
> and maybe you need to link against "libboost_system" and "libxml2" as
> well, if "libCOLOR" really depends on it.
>
>
> Am Mittwoch, 1. März 2017 20:04:50 UTC+1 schrieb Chun Zhang:
>>
&g
ithout the ".a" suffix in the LDFLAGS?
>
> Am Dienstag, 28. Februar 2017 20:06:20 UTC+1 schrieb Chun Zhang:
>>
>> Hi, All,
>>
>> I have googled quite a bit about this issue, there are some tutorials
>> online. But most of them targeted either at o
script and passing all compiler
parameters explicitly. But this does not seem to be an optimal solution. If
there is anything else that I can try, please let me know.
Thanks,
Chun
On Wednesday, March 1, 2017 at 1:20:16 PM UTC-5, Ian Lance Taylor wrote:
>
> On Wed, Mar 1, 2017 at 10:1
-switches"
in the `go env` output has the -fdebug-prefix-map changed each and
everytime, is that expected?
go version go1.7.1 linux/amd64
Best Regards,
Chun
On Wednesday, March 1, 2017 at 1:01:45 PM UTC-5, Ian Lance Taylor wrote:
>
> On Wed, Mar 1, 2017 at 8:13 AM, Chun Zhang >
ll be appreciated.
Thanks,
Chun
On Tuesday, February 28, 2017 at 2:49:19 PM UTC-5, Chun Zhang wrote:
>
> Thank you for your reply! I read a few posts between you and Stephen
> before posting this.
>
> Sorry, it was a bad copy and paste.
>
> I did have the import "C" l
to build the whole library.
Best Regards,
Chun
On Tuesday, February 28, 2017 at 2:44:21 PM UTC-5, Ian Lance Taylor wrote:
>
> On Tue, Feb 28, 2017 at 11:04 AM, Chun Zhang > wrote:
> >
> > An empty libcolor.go file with the following lines was manually created
> >
Hi, All,
I have googled quite a bit about this issue, there are some tutorials
online. But most of them targeted either at older go releases or C instead
of C++.
Can somebody please help me to figure out how to solve the following issues?
I have to use a static library, wrote in C++ in a go
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