main.cpp

#include <net/if.h>
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
#include <linux/nl80211.h>
#include <pcap.h>
#include <iostream>


#include <radiotap.h>


using std::cout;
using std::cin;
using std::endl;


bool changeChannel(char *device,int channel){

    int frequencyMhz = 2412 + (channel-1) *5;


    struct nl_sock *sckt = nl_socket_alloc();
    genl_connect(sckt);

    struct nl_msg *mesg = nlmsg_alloc();

    enum nl80211_commands command = NL80211_CMD_SET_WIPHY;

    genlmsg_put(mesg, 0, 0, genl_ctrl_resolve(sckt, "nl80211"), 0, 0, command, 0);

    NLA_PUT_U32(mesg, NL80211_ATTR_IFINDEX, if_nametoindex(device));
    NLA_PUT_U32(mesg, NL80211_ATTR_WIPHY_FREQ, frequencyMhz);

    nl_send_auto_complete(sckt, mesg);
    //printf("%d Bytes Sent\n", ret);

    nlmsg_free(mesg);
    return true;

    nla_put_failure:
        nlmsg_free(mesg);
        //printf("PUT Failure\n");
        return false;
}

int main(int argc, char *argv[])
{
    char device[100] = "wlan3";
    char* dev = device;
    char errbuf[PCAP_ERRBUF_SIZE];
    pcap_t* handle = pcap_open_live(dev, BUFSIZ, 1, 1000, errbuf);
    if (handle == NULL) {
        printf("couldn't open device %s: %s\n", dev, errbuf);
        return -1;
    }
    int packet_cnt=0;
    while (true) {
        bool isTcp=false;
        struct pcap_pkthdr* header;
        const u_char* packet;
        int res = pcap_next_ex(handle, &header, &packet);
        //cout << "test";
        radiotap radio(packet);
       // printf("ext %d nextext %d\n", r_present->ext,(r_present+1)->ext);
        cout << endl;
    }
    return 0;

}