Add Linux Bluetooth test application

diff --git a/linux-bt/Makefile b/linux-bt/Makefile
new file mode 100644 (file)
index 0000000..7d3390d
--- /dev/null
+++ b/linux-bt/Makefile
@@ -0,0 +1,16 @@
+CFLAGS = -Wall -O2
+SRC = l2cap_client.c
+PRG = l2cap_client
+
+OBJS = $(SRC:.c=.o)
+
+all: $(PRG)
+
+$(PRG): $(OBJS)
+       $(CC) -o $(PRG) $(OBJS) -lbluetooth
+
+%.o: %c
+       $(CC) -c $(CFLAGS) -o $@ $<
+
+clean:
+       rm -f $(OBJS) $(PRG)

diff --git a/linux-bt/README.txt b/linux-bt/README.txt
new file mode 100644 (file)
index 0000000..782090e
--- /dev/null
+++ b/linux-bt/README.txt
@@ -0,0 +1,16 @@
+
+l2cap_client
+
+Is a small test application to test the Bluetooth connection to
+Oswald-MetaWatch. It opens a L2CAP connection to a give Bluetooth address.
+After successful connection establishment it output all data received to
+stdout and send data received from stdin (keyboard) to the watch. Input via
+stdin is not in cbreak mode, i.e. input must be finished with CR before it
+is sent to the watch.
+
+Building
+Simply type "make". Depend on libbluetooth and its development files.
+
+Running
+Start with Bluetooth address of the watch as cmdline argument:
+       l2cap_client 11:22:33:44:55:66

diff --git a/linux-bt/l2cap_client.c b/linux-bt/l2cap_client.c
new file mode 100644 (file)
index 0000000..a3fb782
--- /dev/null
+++ b/linux-bt/l2cap_client.c
@@ -0,0 +1,95 @@
+/*
+ * (c) 2013 Nils Faerber, Siegen, Germany
+ * licensed under GPLv2
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/l2cap.h>
+
+int main(int argc, char **argv)
+{
+       struct sockaddr_l2 addr = { 0 };
+       int s, status, len, i;
+       char buf[255];
+       char dest[18];
+       fd_set infds;
+       fd_set efds;
+
+       if (argc < 2) {
+               fprintf(stderr, "usage: %s <bt_addr>\n", argv[0]);
+               exit(2);
+       }
+
+       strncpy(dest, argv[1], 18);
+
+       // allocate a socket
+       s = socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
+
+       // set the connection parameters (who to connect to)
+       addr.l2_family = AF_BLUETOOTH;
+       addr.l2_psm = htobs(0x1001);
+       str2ba( dest, &addr.l2_bdaddr );
+
+       // connect to server
+       status = connect(s, (struct sockaddr *)&addr, sizeof(addr));
+
+       // send a message
+       if ( status != 0 ) {
+               perror("open socket");
+               close(s);
+               return -1;
+       }
+
+       fprintf(stderr, "connected\n");
+
+       if (fcntl(0, F_SETFL, O_NONBLOCK) != 0)
+               perror("stdin nonblock");
+       if (fcntl(s, F_SETFL, O_NONBLOCK) != 0)
+               perror("socket nonblock");
+
+       while (1) {
+               FD_ZERO(&infds);
+               FD_SET(s, &infds);
+               FD_SET(0, &infds);
+               FD_ZERO(&efds);
+               FD_SET(s, &efds);
+               status = select(s+1, &infds, NULL, &efds, NULL);
+               // fprintf(stderr, "select = %d\n", status);
+               if ( status > 0) {
+                       if (FD_ISSET(0, &infds)) {
+                               len = read(0, buf, 240);
+                               if (len > 0) {
+                                       status = write(s, buf, len);
+                                       if (status < 0)
+                                               perror("write");
+                                       fsync(s);
+                               }
+                       } else if (FD_ISSET(s, &infds)) {
+                               len = read(s, buf, 240);
+                               // fprintf(stderr, "read = %d\n", len);
+                               for (i=0; i<len; i++)
+                                       fprintf(stderr, "%c", buf[i]);
+                               // fprintf(stderr, "\n");
+                       } else if (FD_ISSET(s, &efds)) {
+                               fprintf(stderr, "e on socket\n");
+                       } else
+                               fprintf(stderr, "hu?");
+               } else
+                       perror("select");
+       };
+
+
+       close(s);
+
+       return 0;
+}
+