Parse pcap files to sip message in c++

Question

i want to parse some information from pcap file to my project. I'm creating analizer that can find errors in sip calls. I created the class that can hold such information (not all of them for now). I use Windows and Codeblocks c++ and have installed the pcap library for windows. What is the easiest way to achieve this ?

class Messege
    {
    private:
        int number;
        string cseq;
        string method;
        string callId;
        string source;
        string destination;
        string request;

    public:
        //set
        void setCseq (string newCseq){cseq=newCseq;};
        void setNumber (int newNumber){number=newNumber;};
        void setMethod (string newMethod){method=newMethod;};
        void setSource (string newSource){source=newSource;};
        void setDestination (string newDestination){destination = newDestination;};
        void setCallId (string newCallId){callId = newCallId;};
        void setRequest (string newRequest){request = newRequest;};

        //get
        int getNumber (){return number;};
        string getCseq (){return cseq;};
        string getMethod (){return method;};
        string getSource (){return source;};
        string getDestination () {return destination;};
        string getCallId (){return callId;};
        string getRequest (){return request;};
    };

Answer 1

Your might want to check out libpcap. You can parse a pcap file with:

pcap_t *pcap = pcap_open_offline(pcap_filename, errbuf);
int link_layer_type = pcap_datalink(pcap);
pcap_loop(pcap, -1, pcap_handler, NULL);
pcap_close(pcap);

where pcap_handler is your call back function:

typedef void (*pcap_handler)(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes); 

Find details here.