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      1 /*
      2  *
      3  *  BlueZ - Bluetooth protocol stack for Linux
      4  *
      5  *  Copyright (C) 2001-2010  Marcel Holtmann <marcel (at) holtmann.org>
      6  *
      7  *
      8  *  This program is free software; you can redistribute it and/or modify
      9  *  it under the terms of the GNU General Public License as published by
     10  *  the Free Software Foundation; either version 2 of the License, or
     11  *  (at your option) any later version.
     12  *
     13  *  This program is distributed in the hope that it will be useful,
     14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  *  GNU General Public License for more details.
     17  *
     18  *  You should have received a copy of the GNU General Public License
     19  *  along with this program; if not, write to the Free Software
     20  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     21  *
     22  */
     23 
     24 #ifdef HAVE_CONFIG_H
     25 #include <config.h>
     26 #endif
     27 
     28 #include <stdio.h>
     29 #include <errno.h>
     30 #include <fcntl.h>
     31 #include <unistd.h>
     32 #include <stdlib.h>
     33 #include <string.h>
     34 #include <termios.h>
     35 #include <sys/ioctl.h>
     36 #include <sys/socket.h>
     37 
     38 #include <bluetooth/bluetooth.h>
     39 #include <bluetooth/rfcomm.h>
     40 
     41 static int at_command(int fd, char *cmd, int to)
     42 {
     43 	fd_set rfds;
     44 	struct timeval timeout;
     45 	char buf[1024];
     46 	int sel, len, i, n;
     47 
     48 	len = write(fd, cmd, strlen(cmd));
     49 
     50 	for (i = 0; i < 100; i++) {
     51 
     52 		FD_ZERO(&rfds);
     53 		FD_SET(fd, &rfds);
     54 
     55 		timeout.tv_sec = 0;
     56 		timeout.tv_usec = to;
     57 
     58 		if ((sel = select(fd + 1, &rfds, NULL, NULL, &timeout)) > 0) {
     59 
     60 			if (FD_ISSET(fd, &rfds)) {
     61 				memset(buf, 0, sizeof(buf));
     62 				len = read(fd, buf, sizeof(buf));
     63 				for (n = 0; n < len; n++)
     64 					printf("%c", buf[n]);
     65 				if (strstr(buf, "\r\nOK") != NULL)
     66 					break;
     67 				if (strstr(buf, "\r\nERROR") != NULL)
     68 					break;
     69 				if (strstr(buf, "\r\nCONNECT") != NULL)
     70 					break;
     71 			}
     72 
     73 		}
     74 
     75 	}
     76 
     77 	return 0;
     78 }
     79 
     80 static int open_device(char *device)
     81 {
     82 	struct termios ti;
     83 	int fd;
     84 
     85 	fd = open(device, O_RDWR | O_NOCTTY | O_NONBLOCK);
     86 	if (fd < 0) {
     87 		fprintf(stderr, "Can't open serial port: %s (%d)\n",
     88 							strerror(errno), errno);
     89 		return -1;
     90 	}
     91 
     92 	tcflush(fd, TCIOFLUSH);
     93 
     94 	/* Switch tty to RAW mode */
     95 	cfmakeraw(&ti);
     96 	tcsetattr(fd, TCSANOW, &ti);
     97 
     98 	return fd;
     99 }
    100 
    101 static int open_socket(bdaddr_t *bdaddr, uint8_t channel)
    102 {
    103 	struct sockaddr_rc addr;
    104 	int sk;
    105 
    106 	sk = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
    107 	if (sk < 0) {
    108 		fprintf(stderr, "Can't create socket: %s (%d)\n",
    109 							strerror(errno), errno);
    110 		return -1;
    111 	}
    112 
    113 	memset(&addr, 0, sizeof(addr));
    114 	addr.rc_family = AF_BLUETOOTH;
    115 	bacpy(&addr.rc_bdaddr, BDADDR_ANY);
    116 
    117 	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
    118 		fprintf(stderr, "Can't bind socket: %s (%d)\n",
    119 							strerror(errno), errno);
    120 		close(sk);
    121 		return -1;
    122 	}
    123 
    124 	memset(&addr, 0, sizeof(addr));
    125 	addr.rc_family = AF_BLUETOOTH;
    126 	bacpy(&addr.rc_bdaddr, bdaddr);
    127 	addr.rc_channel = channel;
    128 
    129 	if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
    130 		fprintf(stderr, "Can't connect: %s (%d)\n",
    131 							strerror(errno), errno);
    132 		close(sk);
    133 		return -1;
    134 	}
    135 
    136 	return sk;
    137 }
    138 
    139 static void usage(void)
    140 {
    141 	printf("Usage:\n\tattest <device> | <bdaddr> [channel]\n");
    142 }
    143 
    144 int main(int argc, char *argv[])
    145 {
    146 	int fd;
    147 
    148 	bdaddr_t bdaddr;
    149 	uint8_t channel;
    150 
    151 	switch (argc) {
    152 	case 2:
    153 		str2ba(argv[1], &bdaddr);
    154 		channel = 1;
    155 		break;
    156 	case 3:
    157 		str2ba(argv[1], &bdaddr);
    158 		channel = atoi(argv[2]);
    159 		break;
    160 	default:
    161 		usage();
    162 		exit(-1);
    163 	}
    164 
    165 	if (bacmp(BDADDR_ANY, &bdaddr)) {
    166 		printf("Connecting to %s on channel %d\n", argv[1], channel);
    167 		fd = open_socket(&bdaddr, channel);
    168 	} else {
    169 		printf("Opening device %s\n", argv[1]);
    170 		fd = open_device(argv[1]);
    171 	}
    172 
    173 	if (fd < 0)
    174 		exit(-2);
    175 
    176 	at_command(fd, "ATZ\r\n", 10000);
    177 	at_command(fd, "AT+CPBS=\"ME\"\r\n", 10000);
    178 	at_command(fd, "AT+CPBR=1,100\r\n", 100000);
    179 
    180 	close(fd);
    181 
    182 	return 0;
    183 }
    184