Fwd: RTL_TCP Commands

Chris Svendsen csvendsen2143 at gmail.com
Tue Mar 26 21:06:06 UTC 2013


Got it I was missing the below:

#ifdef _WIN32
#define __attribute__(x)
#pragma pack(push, 1)
#ifdef _WIN32
#pragma pack(pop)
#endif


for now in the function i have

int nFreq;


#define COMM_SET_FREQ ((unsigned char) 0x01)

#ifdef _WIN32
#define __attribute__(x)
#pragma pack(push, 1)
#endif
struct command{
  unsigned char cmd;
  unsigned int param;
}__attribute__((packed));
#ifdef _WIN32
#pragma pack(pop)
#endif



void sendCommand(unsigned char cmds, unsigned int parami) {
        int left;
        int sent;
        int retr = 0;
        struct command cmd={cmds, htonl(parami)};

        left=sizeof(cmd);
        while(left >0) {
                //start the funtion of winsock dll
                        int answer;
                        WSAData wsaData;
                        WORD DLLVersion;
                        DLLVersion = MAKEWORD(2,1);
                        answer = WSAStartup(DLLVersion, &wsaData);
                                SOCKADDR_IN addr;
                                int addrlen = sizeof(addr);
                                    //setup socket
                                    SOCKET sConnect;
                                    // internet family of connection
oriented socket
                                    sConnect = socket(AF_INET,
SOCK_STREAM,NULL);
                                        //configure the strucket it addre
                                    addr.sin_addr.s_addr =
inet_addr("127.0.0.1");
                                        //Now we have to retype the faimly
                                    addr.sin_family = AF_INET;
                                    // set port google htons
                                    addr.sin_port = htons(1234);
                                            // no we have to type in the
client should connect to tthe server
                                    connect(sConnect,    (SOCKADDR*)&addr,
sizeof(addr));
                                     answer = send(sConnect,
(char*)&cmd+(sizeof(cmd)-left), left, 0);

                                     cout << (char*)&cmd+(sizeof(cmd)-left)
<<endl;
                    closesocket(sConnect);
                    return;
        }
}

Works perfectly. Thanks every one for the help.



---------- Forwarded message ----------
From: Chris Svendsen <csvendsen2143 at gmail.com>
Date: Mon, Mar 25, 2013 at 1:10 PM
Subject: RTL_TCP Commands
To: osmocom-sdr at lists.osmocom.org


Sending commands to RTL_TCP
What format do the commands need to be in order to change the frequency of
RTL_TCP.
I have tried the following and the frequency will change but no to the
frequency that is expected for example:


This code :

    char SET_FREQUENCY[] ={0x01};
    string Freq = string(SET_FREQUENCY,1)+"500000000";
    answer = send(sConnect,Freq.c_str(),11,0);

Changes the freq to this:

client accepted!
set freq 892350512
ll+, now 1
ll+, now 2

Any help would be greatly appreciated as i have been stuck on this for days.


Thanks
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