Dear Randy
Thanks for your answer. As you said, my pointer was a NULL pointer. So I
correct the code as follows:
const char *x="Reza";
if (rq->rq_anon != NULL)
{
if (strcmp(rq->rq_anon,x) == 0)
{
//Do something
}
}
Best Regards,
______________________________________________________
Reza Karimi, M.Sc.
Faculty of Electrical and Computer Engineering (ECE)
K.N.Toosi University of Technology
Tehran, IRAN.
-----Original Message-----
From: Turner, Randy [mailto:[email protected]]
Sent: Monday, June 09, 2014 6:23 PM
To: Reza Karimi; [email protected]
Subject: RE: [ns] Problem with const char*
It's possible that the "rq_anon" pointer is either pointing to an invalid
memory location, OR the string pointed to by rq_anon is not null-terminated
Randy
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Reza Karimi
Sent: Sunday, June 08, 2014 1:27 PM
To: [email protected]
Subject: [ns] Problem with const char*
Hi
Please take a look at the following code:
---------------------------------------
const char *x="Reza";
if (strcmp(rq->rq_anon,x) == 0)
{
//Do something
}
--------------------------------------
"rq" is a pointer to the header of RREQ packet and "rq_anon" is a pointer to
const data. This is a part of my routing protocol. Making is OK. The problem
is that when I run my Tcl program related to this routing protocol,
segmentation falut occurs. But when I changed this code to:
---------------------------------------
if (rq->rq_anon == "Reza")
{
//Do something
}
--------------------------------------
it works! with one warning that is expected. So what is the problem? Is it a
bug in NS?
______________________________________________________
Reza Karimi, M.Sc.
Faculty of Electrical and Computer Engineering (ECE)
K.N.Toosi University of Technology
Tehran, IRAN.
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