Re: [Bluez-devel] About rfcomm socket

[mike <mikelee@avantwave.com>]

Dear Marcel
    Thanks for helping. and sorry for disturbing two mailing list.
    Here are the codes generate problems.(i omitted some codes because 
of the size)

My english is no good, I try to make it clear.
There are 3 device, Target device, computer A, computer B. Target device 
is running the code below i.e. connect to computer A through channel 3 
and listen at channel 2. It supposed that computer B can connect to 
target device when target device is connecting others, but it fails. And 
when target stop connecting computer A, computer B can then connect to 
target with channel 2!



int main(void)
{
    if ((connect_pid=fork())==0)
    {
        DEBPRINT("Connect process %d\n",getpid());
        printf("Start connecting...\n");
        do_connect(&stateData);
        return 0;
    }
    else
    {
        DEBPRINT("RTSP listen process %d\n",getpid());
        // waiting phone to connect
        printf("Start listening...\n");
        do_listen(&stateData);
    }
}
int do_connect(TPVSerial_State_t *stateData)
{
    struct sockaddr_rc sa;
    int sk,retry;


    // Create RFCOMM socket
    sk = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
    if(sk < 0)
    {
        syslog(LOG_ERR, "Cannot create RFCOMM socket. %s(%d)",
                strerror(errno), errno);
        return -1;
    }
   
    sa.rc_family  = AF_BLUETOOTH;
    sa.rc_channel = 3;
    str2ba("00:e0:07:cb:15:68",&sa.rc_bdaddr);

    retry = 3;   
    while(retry--)
    {
        int ret, alen = sizeof(sa);
        DEBPRINT("Conecting...\n");
        ret = connect(sk, (struct sockaddr *) &sa, alen);
        if(ret<0)
        {
            syslog(LOG_ERR, "Connect failed. %s(%d)", strerror(errno), 
errno);
            continue;
        }
        DEBPRINT("Connected\n");

        ba2str(&sa.rc_bdaddr, ba);
   
        syslog(LOG_INFO, "New connection from %s", ba);
        // to handle the SPP connection
        sp_open_connection(sk, stateData);
        close(sk);
    }

    return 0;
}


int do_listen(TPVSerial_State_t *stateData)
{
    struct sockaddr_rc sa;
    int sk;
    fd_set netfd;

    /* setup RFCOMM channel */
    if (!channel)
        channel = SP_DEFAULT_CHANNEL;

    /* add SPP to local SDP server */
    if (use_sdp)
        sp_sdp_register(channel);

    // Create RFCOMM socket
    sk = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);

    if(sk < 0)
    {
        syslog(LOG_ERR, "Cannot create RFCOMM socket. %s(%d)",
                strerror(errno), errno);
        return -1;
    }
    //NONBLOCK socket
    flags = fcntl(sk,F_GETFL,0);
    fcntl(sk,F_SETFL,O_NONBLOCK|flags);
   
    sa.rc_family  = AF_BLUETOOTH;
    sa.rc_channel = channel;
    sa.rc_bdaddr  = src_addr;

    if (bind(sk, (struct sockaddr *) &sa, sizeof(sa)))
    {
        syslog(LOG_ERR, "Bind failed. %s(%d)", strerror(errno), errno);
        return -1;
    }


    listen(sk, 10);
    FD_ZERO(&netfd);
   
    terminate = 0;
    while(!terminate)
    {
        int  alen = sizeof(sa), nsk;
       

        FD_SET(sk,&netfd);
        syslog(LOG_INFO, "Waiting for connection...");
        DEBPRINT("wait Accept\n");
        select(sk+1,&netfd,NULL,NULL,NULL)

        if(FD_ISSET(sk,&netfd)){       
            nsk = accept(sk, (struct sockaddr *) &sa, &alen);
            if(nsk<0)
            {
                syslog(LOG_ERR, "Accept failed. %s(%d)", 
strerror(errno), errno);
                continue;
            }
            DEBPRINT("Accepted\n");
   
            ba2str(&sa.rc_bdaddr, ba);
   
            syslog(LOG_INFO, "New connection from %s", ba);

            // to handle the SPP connection
            sp_open_connection(nsk, stateData);
            close(nsk);
        }
    }

    if(use_sdp)
        sp_sdp_unregister();
    return 0;
}

Best regard
Mike,Lee

Marcel Holtmann wrote:

>Hi Mike,
>
>you posted your request to both mailing lists. Don't do any cross
>posting.
>
>  
>
>>    Here is code fragment. I use usual fork practise to run these two 
>>func do_connect and do_listen.  I hard code the bluetooth device to be 
>>connected just because code is under testing.
>>    And these two func are using different channel, it can be connected 
>>when do_connect retry more than 3 times.
>>    So i do not why it can not be connected when it is trying to connect 
>>another device.
>>    
>>
>
>I don't get your point. Make it clear who is connecting to whom.
>
>And if you don't set your socket to non-blocking the use of select makes
>no sense. Show us the full code.
>
>Regards
>
>Marcel
>
>
>
>
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