initial commit to new repo

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)

linux-bt/README.txt

@@ -0,0 +1,17 @@
+
+l2cap_client
+License: GPLv3
+
+This 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

linux-bt/l2cap_client.c

@@ -0,0 +1,147 @@
+/*
+ * (c) 2013 Nicole 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>
+
+typedef enum {
+	CMD_NULL = 0,
+	CMD_INVAL,
+	CMD_QUIT,
+} cmd_t;
+
+// replace "markups" with appropr. chars
+char *parse_buffer(char *inbuf, int *cmd)
+{
+	int i,o;
+	static char outbuf[240];
+	
+	memset(outbuf,0,240);
+
+	*cmd = CMD_NULL;
+
+	// if a line starts with a \ then it is an internal command
+	if (inbuf[0] == '\\') {
+		switch (inbuf[1]) {
+			case 'q':
+				*cmd = CMD_QUIT;
+				break;
+			default:
+				*cmd = CMD_INVAL;
+				break;
+		}
+		return NULL;
+	}
+	o=0;
+	for (i=0; i<strlen(inbuf); i++) {
+		if (inbuf[i] == '\\') {
+			i++;
+			if (inbuf[i] == 'n')
+				outbuf[o++] = '\n';
+		} else
+			outbuf[o++] = inbuf[i];
+	}
+	return outbuf;
+}
+
+
+int main(int argc, char **argv)
+{
+	struct sockaddr_l2 addr = { 0 };
+	int s, status, len, i, cmd;
+	char buf[255];
+	char dest[18];
+	char *out;
+	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);
+					out = parse_buffer(buf, &cmd);
+					if (cmd != CMD_NULL) {
+						if (cmd == CMD_QUIT) {
+							close(s);
+							exit(0);
+						}
+					} else {
+						len = strlen(out);
+						status = write(s, out, 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;
+}
+