diff --git a/adb/test_track_devices.c b/adb/test_track_devices.c
new file mode 100644
index 0000000..77b3ad9
--- /dev/null
+++ b/adb/test_track_devices.c
@@ -0,0 +1,97 @@
+/* a simple test program, connects to ADB server, and opens a track-devices session */
+#include <netdb.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <memory.h>
+
+static void
+panic( const char*  msg )
+{
+    fprintf(stderr, "PANIC: %s: %s\n", msg, strerror(errno));
+    exit(1);
+}
+
+static int
+unix_write( int  fd, const char*  buf, int  len )
+{
+    int  result = 0;
+    while (len > 0) {
+        int  len2 = write(fd, buf, len);
+        if (len2 < 0) {
+            if (errno == EINTR || errno == EAGAIN)
+                continue;
+            return -1;
+        }
+        result += len2;
+        len -= len2;
+        buf += len2;
+    }
+    return  result;
+}
+
+static int
+unix_read( int  fd, char*  buf, int  len )
+{
+    int  result = 0;
+    while (len > 0) {
+        int  len2 = read(fd, buf, len);
+        if (len2 < 0) {
+            if (errno == EINTR || errno == EAGAIN)
+                continue;
+            return -1;
+        }
+        result += len2;
+        len -= len2;
+        buf += len2;
+    }
+    return  result;
+}
+
+
+int  main( void )
+{
+    int                  ret, s;
+    struct sockaddr_in   server;
+    char                 buffer[1024];
+    const char*          request = "host:track-devices";
+    int                  len;
+
+    memset( &server, 0, sizeof(server) );
+    server.sin_family      = AF_INET;
+    server.sin_port        = htons(5037);
+    server.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+    s = socket( PF_INET, SOCK_STREAM, 0 );
+    ret = connect( s, (struct sockaddr*) &server, sizeof(server) );
+    if (ret < 0) panic( "could not connect to server" );
+
+    /* send the request */
+    len = snprintf( buffer, sizeof buffer, "%04x%s", strlen(request), request );
+    if (unix_write(s, buffer, len) < 0)
+        panic( "could not send request" );
+
+    /* read the OKAY answer */
+    if (unix_read(s, buffer, 4) != 4)
+        panic( "could not read request" );
+
+    printf( "server answer: %.*s\n", 4, buffer );
+
+    /* now loop */
+    for (;;) {
+        char  head[5] = "0000";
+
+        if (unix_read(s, head, 4) < 0)
+            panic("could not read length");
+
+        if ( sscanf( head, "%04x", &len ) != 1 )
+            panic("could not decode length");
+
+        if (unix_read(s, buffer, len) != len)
+            panic("could not read data");
+
+        printf( "received header %.*s (%d bytes):\n%.*s", 4, head, len, len, buffer );
+    }
+    close(s);
+}