sockets - 带有raspberrypi的android设备的蓝牙通信-连接被拒绝时出现错误

Question

我已经尝试过使用 raspberrypi 进行蓝牙通信的套接字编程。但是每次我因为错误而被拒绝连接时。我已经在 pi 上安装了所有必要的蓝牙包。

client code
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>

int main(int argc, char **argv)
{
    struct sockaddr_rc addr = { 0 };
    int s, status;
    char dest[18] = "01:23:45:67:89:AB";

// allocate a socket
s = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);

// set the connection parameters (who to connect to)
addr.rc_family = AF_BLUETOOTH;
addr.rc_channel = (uint8_t) 1;
str2ba( dest, &addr.rc_bdaddr );

// connect to server
status = connect(s, (struct sockaddr *)&addr, sizeof(addr));

// send a message
if( status == 0 ) {
    status = write(s, "hello!", 6);
}

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

close(s);
return 0;

}
服务器代码：

#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>

int main(int argc, char **argv)
{
   struct sockaddr_rc loc_addr = { 0 }, rem_addr = { 0 };
   char buf[1024] = { 0 };
   int s, client, bytes_read;
   socklen_t opt = sizeof(rem_addr);

// 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, 1);

// accept one connection
client = 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, buf, sizeof(buf));
if( bytes_read > 0 ) {
    printf("received [%s]\n", buf);
}

// close connection
close(client);
close(s);
return 0;

}

当我的设备的可见性关闭时，它会说“主机已关闭” 当可见性打开并且我配对设备时，它说连接被拒绝。

标签： socketsbluetoothraspberry-pi3bluezconnection-refused