RFCOMM server multiple client connections

[Kasper Revsbech <mail@xxxxxxxxxxxx>]

Hi everyone.
I am trying do do a simple client server setup  with bluez.
I can manage to have a client and a server on rfcomm sockets where the 
server listen on a socket and accept a connection from the client by 
connect. But then if I set the server back to accepting without putting 
down the one client connection it doesn't accept a new connection.
When I read thought the documentation I can find on Bluez and Bluetooth 
in general it seems like it should be possible to multiplex serveal 
virtual rfcomm connections  on one actual connection. But however I 
really can get it working and can't find any code where they do 
something similar.

Hope that someone can give me a hint...

/Kasper Revsbech


Here is a example of what I have tried to make it work:

Client:
--------------------------

#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
#define number_of_connections 5

int main(int argc, char **argv)
{

 struct sockaddr_rc addr = { 0 };
 int s[number_of_connections], status, getpeer_status;
   char dest[18] = "00:11:67:05:4f:dc";
   struct sockaddr peer_address;
   int namelen = sizeof(peer_address),i;

   // set the connection parameters (who to connect to)
   addr.rc_family = AF_BLUETOOTH;
   addr.rc_channel = (uint8_t) 1;
   str2ba( dest, &addr.rc_bdaddr );
  
for (i=0 ;i=(number_of_connections-1);i++){
  
     s[i] = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);

 
    /*connect to server*/
     status = connect(s[i], (struct sockaddr *)&addr, sizeof(addr));
  
  
   // send a message
   if( status == 0 ) {
     status = write(s[i], "hello!", 6);
   }

   if( status < 0 ) perror("uh oh");
   }
 



   for (i=0 ;i=(number_of_connections-1);i++){
     close(s[i]);
   }  

   return 0;
}

-----------------------------------
Server:
-----------------------------------
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
#define number_of_connections 5

int main(int argc, char **argv)
{
   struct sockaddr_rc loc_addr = { 0 }, rem_addr = { 0 };
   char buf[1024] = { 0 };
   int s, client[number_of_connections], bytes_read;
   socklen_t opt = sizeof(rem_addr);
   int i;
   // allocate socket
   s = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);

   // bind socket to port 1 of the first available
   // local bluetooth adapter
   loc_addr.rc_family = AF_BLUETOOTH;
   loc_addr.rc_bdaddr = *BDADDR_ANY;
   loc_addr.rc_channel = (uint8_t) 1;
   bind(s, (struct sockaddr *)&loc_addr, sizeof(loc_addr));

   // put socket into listening mode
   listen(s, number_of_connections);
   for (i=0 ;i=(number_of_connections-1);i++){

   // accept one connection
     client[i] = accept(s, (struct sockaddr *)&rem_addr, &opt);

     ba2str( &rem_addr.rc_bdaddr, buf );
     fprintf(stderr, "accepted connection from %s\n", buf);
     memset(buf, 0, sizeof(buf));

     // read data from the client
     bytes_read = read(client[i], buf, sizeof(buf));
     if( bytes_read > 0 ) {
       printf("received [%s]\n", buf);
     }
   }
  
   // close connection
     for (i=0 ;i=(number_of_connections-1);i++){
      close(client[i]);
    }
    close(s);
   return 0;



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