Break out Bluetooth functions in own module

[metawatch.git] / bt_helper.c

diff --git a/bt_helper.c b/bt_helper.c
new file mode 100644 (file)
index 0000000..34ad50d
--- /dev/null
+++ b/bt_helper.c
@@ -0,0 +1,136 @@
+/*
+ * (c) 2011 Siegen, Germany by Nils Faerber <nils.faerber@kernelconcepts.de>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <termios.h>
+#include <ctype.h>
+
+#include <errno.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/rfcomm.h>
+
+
+int open_socket(bdaddr_t *bdaddr, uint8_t channel)
+{
+       struct sockaddr_rc addr;
+       int sk, opt;
+
+       sk = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
+       if (sk < 0) {
+               fprintf(stderr, "Can't create socket: %s (%d)\n",
+                       strerror(errno), errno);
+               return -1;
+       }
+
+       memset(&addr, 0, sizeof(addr));
+       addr.rc_family = AF_BLUETOOTH;
+       bacpy(&addr.rc_bdaddr, BDADDR_ANY);
+
+       if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+       fprintf(stderr, "Can't bind socket: %s (%d)\n", strerror(errno), errno);
+               close(sk);
+               return -1;
+       }
+
+       /* Set link mode */
+       opt = 0;
+       opt |= RFCOMM_LM_MASTER;
+       opt |= RFCOMM_LM_AUTH;
+/*
+       opt |= RFCOMM_LM_ENCRYPT;
+       opt |= RFCOMM_LM_SECURE;
+*/
+       if (opt && setsockopt(sk, SOL_RFCOMM, RFCOMM_LM, &opt, sizeof(opt)) < 0) {
+               fprintf(stderr, "Can't set RFCOMM link mode: %s (%d)", strerror(errno), errno);
+               close(sk);
+               return -1;
+       }
+
+       memset(&addr, 0, sizeof(addr));
+       addr.rc_family = AF_BLUETOOTH;
+       bacpy(&addr.rc_bdaddr, bdaddr);
+       addr.rc_channel = channel;
+
+       if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+               fprintf(stderr, "Can't connect: %s (%d)\n", strerror(errno), errno);
+               close(sk);
+               return -1;
+       }
+
+       return sk;
+}
+
+static void mbaswap(bdaddr_t *dst, const bdaddr_t *src)
+{
+       register unsigned char *d = (unsigned char *) dst;
+       register const unsigned char *s = (const unsigned char *) src;
+       register int i;
+
+       for (i = 0; i < 6; i++)
+               d[i] = s[5-i];
+}
+
+static int mbachk(const char *str)
+{
+       if (!str)
+               return -1;
+
+       if (strlen(str) != 17)
+               return -1;
+
+       while (*str) {
+               if (!isxdigit(*str++))
+                       return -1;
+               if (!isxdigit(*str++))
+                       return -1;
+               if (*str == 0)
+                       break;
+               if (*str++ != ':')
+                       return -1;
+       }
+
+       return 0;
+}
+
+int str2ba(const char *str, bdaddr_t *ba)
+{
+       bdaddr_t b;
+       int i;
+
+       if (mbachk(str) < 0) {
+               memset(ba, 0, sizeof(*ba));
+               return -1;
+       }
+
+       for (i = 0; i < 6; i++, str += 3)
+               b.b[i] = strtol(str, NULL, 16);
+
+       mbaswap(ba, &b);
+
+       return 0;
+}
+