Re: [Bluez-devel] Need Help In SDP Programming......

["Mingfan.Lu" <lucharse@gmail.com>]

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Hi,
  What is your kernel version and Have you patch the latest bluez-patch ?.
  I think it is the problem of currency connections. There are many
discussions about it in the maillist. From patch-linux-2.6.18-mh4
  The problem seems to be solved.


2 Nov 2006 04:39:06 -0000, Rupesh Gujare <rupesh_gujare@rediffmail.com>:
>
> Hello all,
>     I am a newbie to bluez programming. and i am currently writing a code
> that will discover all nearby bluetooth devices and make a SDP enquiry to
> know on which channel "OBEX Object Push" service is running.
>   For this purpose i have gone through a quiet a few documentation and
> sample code. And i am ready with some code.
>
>   Now my question is why it is required to give a "sleep(1)" call before
> sdp_connect() call? If i dont give it, sdp connection simply fails. And how
> should i reduce over all time of making discovery of devices and connecting
> to their respective SDP servers.
>   I am using USB dongle as a local bluetooth device.
>
>   Can someone help me on this issues? And how can i write better and
> efficient code?
> Any reviews and suggestions for improvement r welcomed.
> Any help will be greatly appreciated.
> Thanks in advance
> Rupesh..
>
> My code :----
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <unistd.h>
> #include <sys/socket.h>
> #include <bluetooth/bluetooth.h>
> #include <bluetooth/hci.h>
> #include <bluetooth/hci_lib.h>
> #include <bluetooth/sdp.h>
> #include <bluetooth/sdp_lib.h>
>
> int port_search(bdaddr_t *target);
>
> int main(int argc, char **argv)
> {
>     inquiry_info *ii = NULL;
>     int max_rsp, num_rsp;
>     int dev_id, sock, len, flags;
>     int i;
>     char addr[19] = { 0 };
>     char name[248] = { 0 };
>     dev_id = hci_get_route(NULL);
>     sock = hci_open_dev( dev_id );
>
>   if (dev_id < 0 || sock < 0) {
>       perror("opening socket");
>       exit(1);
>   }
>   len = 8;
>   max_rsp = 255;
>   flags = IREQ_CACHE_FLUSH;
>   ii = (inquiry_info*)malloc(max_rsp * sizeof(inquiry_info));
>   num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
>   printf("%d Blue devices found\n",num_rsp);
>   if( num_rsp < 0 ) perror("hci_inquiry");
>   for (i = 0; i < num_rsp; i++) {
>       ba2str(&(ii+i)->bdaddr, addr);
>       memset(name, 0, sizeof(name));
>       if (hci_read_remote_name(sock, &(ii+i)->bdaddr, sizeof(name),
>           name, 0) < 0)
>       strcpy(name, "[unknown]");
>       printf("%s %s\n", addr, name);
>        port_search(&(ii+i)->bdaddr);
>   }
>   free( ii );
>   close( sock );
>   return 0;
> }
>
>
>
>
> int port_search(bdaddr_t *target)
> {
>     uint16_t svc_uuid_int = 0x1105;
>     int status;
>     char addr[18];
>     bdaddr_t local_addr;
>     uuid_t svc_uuid;
>     sdp_list_t *response_list, *search_list, *attrid_list;
>     sdp_session_t *session = 0;
>     uint32_t range = 0x0000ffff;
>     uint8_t port = 0;
>
>     ba2str(target,addr);
>      printf("Target blue addr is %s\n",addr);
>      //str2ba( addr, &target );
>     // connect to the SDP server running on the remote machine
>
>       ba2str(&local_addr, addr);
>       printf("Local address is %s\n",addr);
>        sleep(1);
>       session = sdp_connect( BDADDR_ANY, target,SDP_RETRY_IF_BUSY);
>      if (session==NULL)
>      {
>           printf("Can not connect to SDP server\n");
>           return -1;
>      }
>     sdp_uuid16_create( &svc_uuid, svc_uuid_int );
>     search_list = sdp_list_append( 0, &svc_uuid );
>     attrid_list = sdp_list_append( 0, &range );
>     // get a list of service records that have UUID 0xabcd
>     response_list = NULL;
>
>   status = sdp_service_search_attr_req( session, search_list,
> SDP_ATTR_REQ_RANGE, attrid_list, &response_list);
>   if( status == 0 ) {
>             if(response_list==NULL)
>             {
>                  printf("Object Push Service not found\n");
>                  return -1;
>             }
>        sdp_list_t *proto_list;
>       sdp_list_t *r = response_list;
>       // go through each of the service records
>       for (; r; r = r->next ) {
>           sdp_record_t *rec = (sdp_record_t*) r->data;
>           // get a list of the protocol sequences
>           if( sdp_get_access_protos( rec, &proto_list ) == 0 )
>            //    if(sdp_get_profile_descs(rec,&proto_list)==0)
>             {
>
>               // get the RFCOMM port number
>               port = sdp_get_proto_port( proto_list, RFCOMM_UUID );
>               sdp_list_free( proto_list, 0 );
>           }
>           sdp_record_free( rec );
>       }
>   }
>   sdp_list_free( response_list, 0 );
>   sdp_list_free( search_list, 0 );
>   sdp_list_free( attrid_list, 0 );
>   sdp_close( session );
>   if( port != 0 ) {
>       printf("found service running on RFCOMM port %d\n", port);
>   }
>   return 0;
> }
>
>
>
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>


-- 
With respects,
   Mingfan.Lu

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-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642

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