Hello, I'm new to using Bluez. I need to create a simple program to send text over a specific type of port (SOCK_DGRAM, BTPROTO_L2CAP). The code compiles fine, but when I run it i get the following error (from then sendto function). Send Failed: Invalid argument What might the problem be? My code is shown below. Thank-you so much for any help that you can offer.,verber #include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h> #include <bluetooth/bluetooth.h>#include <bluetooth/l2cap.h>#include <bluetooth/hci.h>#include <bluetooth/hci_lib.h> #include "l2cap_msg_send.h" int fd; int send_msg(){ /* SETTING UP SOCKET */ struct sockaddr_l2 addr; unsigned int psm = 0x1001; fd = socket(AF_BLUETOOTH, SOCK_DGRAM, BTPROTO_L2CAP); if (fd == -1) { fprintf(stderr, "Could not open socket: %s\n", strerror(errno)); exit(1); } addr.l2_family = AF_BLUETOOTH; bacpy(&addr.l2_bdaddr, BDADDR_ANY); addr.l2_psm = htobs(psm); if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { fprintf(stderr, "Could not bind socket: %s\n", strerror(errno)); exit(1); } /* END: SETTING UP SOCKET*/ /* SET UP MSG */ char recv_addr[18] = "00:0A:3A:53:1C:42"; struct sockaddr_l2 recipient; recipient.l2_family = AF_BLUETOOTH; str2ba(recv_addr,&(recipient.l2_bdaddr)); recipient.l2_psm = htobs(psm); char message[] = "57 123 189"; /* END: SET UP MSG */ /* SEND MSG */ int ret; socklen_t len; len=sizeof(recipient.l2_bdaddr); size_t msg_len; msg_len=sizeof(message); ret = sendto(fd, &message, msg_len,0, (struct sockaddr *) &recipient, len); printf("%d\n",ret); if( ret < 0 ) fprintf(stderr,"Send Failed: %s\n",strerror(errno)); /* END: SEND MSG */ // close(fd); return 0;}
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I didn't look very carefully at your code, but the first thing I
noticed is how you create the socket, I wrote a C++ wrapper over bluez
a while ago and it has a class for L2Cap connections, the constructor
goes this way:
L2CapSocket::L2CapSocket()
:=09Socket( PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP )
{}
and it worked great for me, so maybe you should pass different
parameters to the socket(...); call.
regards,
Paul
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Thanks for the help Paul,
?
Unfortunately, for reasons outside the scope of this email I am restricted to using
SOCK_DGRAM only for this program instead of?SOCK_SEQPACKET or any other values.
?
Thanks again,
verber
> From: [email protected]> To: [email protected]> Subject: Re: [Bluez-users] sendto give invalid argument> Date: Sat, 14 Jan 2006 00:32:07 +0100> > I didn't look very carefully at your code, but the first thing I> noticed is how you create the socket, I wrote a C++ wrapper over bluez> a while ago and it has a class for L2Cap connections, the constructor> goes this way:> > L2CapSocket::L2CapSocket()> : Socket( PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP )> {}> > and it worked great for me, so maybe you should pass different> parameters to the socket(...); call.> > regards,> Paul> > > -------------------------------------------------------> This SF.net email is sponsored by: Splunk Inc. Do you grep through log files> for problems? Stop! Download the new AJAX search engine that makes> searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!> http://ads.osdn.com/?ad_idv37&alloc_id865&op=ick> _______________________________________________> Bluez-users mailing list> [email protected]> https://lists.sourceforge.net/lists/listinfo/bluez-users
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