pcap_dump | Explore : packets , pcap , tcpdump , tcpflow , gopacket , osquery | Learning library

I am simply trying to capture the packets on dev.str() interface and store it in a file which can later be used for analysis.

case 1: pcap_loop- when i used pcap_loop, it called pcap_dump function and printed this line "inside pcap_dump()" infinite times and finally crashed.

case 2: pcap_dispatch - when i used this pcap_dispatch, it always returned with 0 and never entered pcap_dump function.

what does this mean? I have no pcap_setfilter.

Please suggest on how can i solve this problem.

I'm making a simple Qt app that reads stuff from a CSV file and generates a PCAP data file out of it for reading by some other software.

And so soon as I invoque pcap_open_dead, pcap_dump_open or pcap_dump, I get no more console output upon running my small converter. Even the Hello World that comes at the beginning of the main doesn't show up any more. From the code below, if I simply comment out those three methods, the console output and "Hello World" come back.

Being new and therefore clueless about pcap, I ask for help.

i'm working on improve a given code (don't know who wrote that )

i'm using pcap_dump()and #include to capture and wri files to disk. The file that was writing is with read permission also for group and other (-rw-r--r--)

Is there a way to change it to user read/write only (-rw-------) or that i'll have to do a workaround. thanks