custom packet in injection mode

[libing64]

@dpward
Hi, David
I am using injection mode to collection csi data from more than one transmitters. Now I can receive csi data from two transmitters simultaneously, but I don't know which transmitter the data belongs to.
Can you give me some advice to get the source address of each csi data?

Thanks.

[libing64]

At the transmitter part, the packet is generated and sent, but at the receiver part, I can only get csi information, but how to get the bytes in the custom packet?

#1. transmitter code to copy custom data to the payload and send it

payload_memcpy(packet->payload, packet_size,
                (i*packet_size) % PAYLOAD_SIZE);
ret = tx80211_txpacket(&tx, &tx_packet);

#2. receiver code to get csi data

    int ret = recv(sock_fd, netlink_buffer, sizeof(netlink_buffer), 0);
    if (ret == -1) {
        perror("netlink recv");
        return ret;
    }

    /* Pull out the message portion and print some stats */
    struct cn_msg *cmsg = (struct cn_msg*)NLMSG_DATA(netlink_buffer);
/*  printf("received %d bytes: id: %u val: %u seq: %u clen: %d\n", */
/*          cmsg->len, cmsg->id.idx, cmsg->id.val, */
/*          cmsg->seq, cmsg->len); */
    *buf = cmsg->data;
    *len = cmsg->len;

Where is the custom data in the payload? could anyone help me?

[libing64]

@dhalperi @dpward @ippeb

[dhalperi]

Read the existing issues! #101

[swashah]

@libing64 : Were you able to customize packets in injection mode? I want a sequence number with every packet sent and then read. I will appreciate your help.Thanks