[ndnSIM] Reading and Removing Tag in Data Packet
Tun Tun Oo
htunhtunu at gmail.com
Wed Apr 30 23:47:19 PDT 2014
Sorry,it is my typing error.
The correct code is:
bool isTag = data->GetPayload()->PeekPacketTag(tag);
read = tag.GetTag();
NS_LOG_INFO ("Infomation "<< read << " : received from data >
//to remove tag
if (tag.GetTag () != 0)
std::cout << "Cannot Remove the tag in data > "<<
When I received the data, firstly I read it using PeekPacketTag(tag).
After reading it, I want to remove the tag using RemovePacketTag (tag).
In the last line, I check it remove or not, but I received "Cannot Remove
the tag in the data".
If I am correctly understand, whenever I get this line of "Cannot Remove
Tag...", I cannot remove the tag.
My problem is I always received this message (except actual tagged data
zero) and therefore I cannot add new data to tag.
Why I cannot remove this tag?
Thanks a lot for your help.
On Thu, May 1, 2014 at 1:09 PM, Alex Afanasyev <alexander.afanasyev at ucla.edu
> Hi Tun,
> You didn't mention what exactly is the problem / error message?
> From the code you gave, I see that you assigned result of PeekPacketTag
> check to `isTag` variable, but used `isQueueTag` variable in the condition.
> On Apr 30, 2014, at 1:14 AM, Tun Tun Oo <htunhtunu at gmail.com> wrote:
> Dear Alex,
> In my customize forwarding, I want to send local information of every hop
> by tagging data packet.
> When router received data, it read tag and then remove it and add it again
> router information.
> But I found a problem when I remove the tag. Actually I think I cannot
> remove the tag.
> MyTag tag;
> bool isTag = data->GetPayload()->PeekPacketTag(tag);
> if (isQueueTag)
> read = tag.GetTag();
> NS_LOG_INFO ("Infomation "<< read << " : received from data >
> "<< data->GetName());
> //to remove tag
> ConstCast<Packet>(data->GetPayload())->RemovePacketTag (tag);
> if (tag.GetTag != 0)
> std::cout << "Cannot Remove the tag in data > "<<
> Could you give me an advice how should I do it?
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the ndnSIM