[Solved] How to use libcap in Qt?

MohammadReza

Hello firends.
First excuse me because of my English writing.

I want to create an application by libpcap in Qt in Kali linux. I create similar application in windows & does work.

I download & install libpcap. Now, Qt recognizes pcap.h but some functions & constants does not work. like as: pcap_open - PCAP_OPENFLAG_PROMISCUOUS - pcap_findalldevs_ex - PCAP_SRC_IF_STRING - _snprintf_s.

The compiler errors similar as 'sth' was not declared in this scope. I use below headers but above errors apppear.

Are there anything to add to .pro file?

Thanks a lot.
Ya Ali.

andreyc

Have you added pcap library to .pro file?
Something like
@
LIBS += -L/path/to/libpcap
LIBS += -lpcap
INCLUDEPATH += /path/to/libpcap/headers
DEPENDPATH += /path/to/libpcap/headers
@

MohammadReza

I have a simple question.
I could find LIB path but how can I find INCLUDEPATH & DEPENDPATH?

andreyc

These variables should point to the directory where pcap.h is located.
If you don't have pcap.h then you need to install dev package.

MohammadReza

Thanks for your response Dear andreyc.
I added these code but 5 errors increased to 58 errors:

LIBS += -L/usr/lib/i386-linux-gnu/libpcap.so.1.3.0
INCLUDEPATH += /usr/include/pjlib-util/

andreyc

Your set of LIBS is incorrect. It should be
@
LIBS += -L/usr/lib/i386-linux-gnu -lpcap
@

MohammadReza

58 decreased to 43 errors but strange errors exists such as:
memcmp was not declare ...
or
::memset has not been declared
etc
I dont use them & some of them are in qstring.h.

andreyc

Could you put the error log here.

MohammadReza

A screen shot of some of the error:

!http://upload7.ir/imgs/2014-03/49544482189634377307.png(http://upload7.ir/imgs/2014-03/49544482189634377307.png)!

MohammadReza

I thinks the above strange errors occured by INCLUDEPATH.
I replcae above code by this one & change some functions:
@
LIBS += -L/usr/local/lib/ -lpcap
@

now Just these errors:
pcap_open, PCAP_OPENFLAG_PROMISCUOUS and PCAP_SRC_IF_STRING was not declared in this code.

I searched & I think above functions & constants does not exist in libpcap (just exist in winpcap)

However, Thake be to GOD & Thanks to Dear andreyc.

andreyc

Glad to hear that you've resolved the issue.

Could you put "[SOLVED]" in front your initial subject that other people will see that the issue is resolved.

Regarding many errors introduced by INCLUDEPATH
I guess you missed plus sign in you .pro files and made all standard headers invisible for qmake.
It is important to use '+=' not just '=' in INCLUDEPATH
@
INCLUDEPATH += /some/additional/path/that/wont/break/build
@