wrapper arround rfcomm command line tool

3 files changed, 253 insertions, 1 deletions

diff --git a/noncore/net/opietooth/manager/manager.pro b/noncore/net/opietooth/manager/manager.pro
index 4684c67..d3c69e0 100644
--- a/noncore/net/opietooth/manager/manager.pro
+++ b/noncore/net/opietooth/manager/manager.pro
@@ -9,4 +9,5 @@ HEADERS         = btconnectionitem.h btdeviceitem.h \
                   pppdialog.h obexdialog.h \
                   devicehandler.h rfcpopup.h obexpopup.h \
+                  rfcommhelper.h
                   
 SOURCES         = btconnectionitem.cpp btdeviceitem.cpp \ 
@@ -17,5 +18,6 @@ SOURCES         = btconnectionitem.cpp btdeviceitem.cpp \
                   bticonloader.cpp pppdialog.cpp \
                   obexdialog.cpp devicehandler.cpp \
-                  rfcpopup.cpp obexpopup.cpp
+                  rfcpopup.cpp obexpopup.cpp \
+                  rfcommhelper.cpp
 INCLUDEPATH     += $(OPIEDIR)/include
 INCLUDEPATH     += $(OPIEDIR)/noncore/net/opietooth/lib
diff --git a/noncore/net/opietooth/manager/rfcommhelper.cpp b/noncore/net/opietooth/manager/rfcommhelper.cpp
new file mode 100644
index 0000000..0769da2
--- a/dev/null
+++ b/noncore/net/opietooth/manager/rfcommhelper.cpp
@@ -0,0 +1,181 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <signal.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+
+
+#include "rfcommhelper.h"
+
+using namespace OpieTooth;
+
+bool RfCommHelper::terminate = false;
+pid_t RfCommHelper::m_pid;
+
+RfCommHelper::RfCommHelper()
+    : m_connected( false )
+{
+    signal( SIGCHLD, signal_handler );
+}
+RfCommHelper::~RfCommHelper() {
+    detach();
+}
+QCString RfCommHelper::attachedDevice() const {
+    return m_device;
+}
+void RfCommHelper::detach() {
+    if (m_connected )
+        ::kill( m_pid,  9 );
+    if ( m_in2out[0] )
+        close(m_in2out[0] );
+    if ( m_in2out[1] )
+        close(m_in2out[1] );
+    if ( m_out2in[0] )
+        close(m_out2in[0] );
+    if ( m_out2in[1] )
+        close(m_out2in[1] );
+}
+bool RfCommHelper::attach( const QString& bd_addr, int port ) {
+    int i =0;
+    bool ok = false;
+    while (!ok   ) {
+        if (i == 4) break;
+        ok = connect( i,  bd_addr,  port );
+        i++;
+    }
+    return ok;
+}
+/*
+ * not implemented yet
+ */
+void RfCommHelper::regroup() {
+
+}
+bool RfCommHelper::connect(int devi, const QString& bdaddr, int port) {
+    m_connected = false;
+    if ( pipe(m_fd) < 0 )
+        m_fd[0] = m_fd[1] = 0;
+    if ( pipe(m_in2out)  < 0 )
+        m_in2out[0] = m_in2out[1] = 0;
+    if ( pipe(m_out2in ) < 0 )
+        m_out2in[0] = m_out2in[1] = 0;
+
+    m_pid = fork();
+    switch( m_pid ) {
+    case -1:
+        return false;
+        break;
+    /*
+     * This is the child code.
+     * We do some fd work
+     * and then we'll execlp
+     * to start it up
+     */
+    case 0:{ // child code
+        setupComChild();
+        char por[15];
+        char dev[15];
+        sprintf( por, "%d", port );
+        sprintf( dev, "%d", devi );
+        execlp( "rfcomm", "rfcomm",  dev, bdaddr.latin1(), por, NULL );
+        char resultByte = 1;
+        if ( m_fd[1] )
+            write(m_fd[1], &resultByte, 1 );
+        _exit( -1 );
+        break;
+    }
+    /*
+     * The Parent. We'll first wait for fd[0] to fill
+     * up.
+     * Then we will wait for out2in[0] to fill up and then
+     * we will parse it.
+     * maybe the signal handler gets it's turn in this case we return
+     * false
+     * otheriwse we will parse the Output and either return true
+     * or false
+     */
+    default: {
+        if ( m_fd[1] )
+            close( m_fd[1] );
+        if ( m_fd[0] ) for (;;) {
+            char resultByte;
+            int len;
+            len = read(m_fd[0], &resultByte, 1 );
+            if ( len == 1 ) { // it failed to execute
+                return false;
+            }
+            if ( len == -1 )
+                if ( (errno == ECHILD ) || (errno == EINTR ) )
+                    continue; // the other process is not yet ready?
+
+            break;
+        }
+        if ( m_fd[0] )
+            close( m_fd[0] );
+        terminate = false;
+        fd_set fds;
+        struct timeval timeout;
+        int sel;
+        while (!terminate ) {
+            FD_ZERO( &fds );
+            FD_SET( m_in2out[0], &fds );
+            timeout.tv_sec = 5;
+            timeout.tv_usec = 0;
+
+            sel = select( m_in2out[0]+1, &fds, NULL, NULL,  &timeout );
+            if ( sel )
+                if (FD_ISSET(m_in2out[0], &fds ) ) {
+                    char buf[2048];
+                    int len;
+                    buf[0]  = 0;
+                    len = read( m_in2out[0], buf,  sizeof(buf) );
+                    if ( len > 0 ) {
+                        QCString string( buf );
+                        if (string.left(9) == "Connected" ) {
+                            m_connected = true;
+                            m_device = m_device.sprintf("/dev/tty%d", devi );
+                            break; // we got connected
+                        };
+                    }
+                    // now parese it
+                }else {// time out
+                    // 5 seconds without input check terminate?
+                    //
+                    ;
+                }
+        }
+        break;
+    }
+    }
+    return !terminate;
+}
+
+
+void RfCommHelper::setupComChild() {
+    if ( m_fd[0] )
+        close(m_fd[0]);
+    if ( m_fd[1] )
+        fcntl( m_fd[1] ,  F_SETFD,  FD_CLOEXEC);
+
+    /* duplicating pipes and making them STDIN and STDOUT
+     * of the new process
+     * [0] is for reading
+     * [1] is for writing
+     */
+    dup2( m_out2in[0], STDIN_FILENO );
+    dup2( m_in2out[1], STDOUT_FILENO );
+
+
+};
+void RfCommHelper::signal_handler(int) {
+    int status;
+    terminate = true;
+    signal( SIGCHLD, signal_handler );
+    waitpid( m_pid, &status, WNOHANG );
+}
diff --git a/noncore/net/opietooth/manager/rfcommhelper.h b/noncore/net/opietooth/manager/rfcommhelper.h
new file mode 100644
index 0000000..545998c
--- a/dev/null
+++ b/noncore/net/opietooth/manager/rfcommhelper.h
@@ -0,0 +1,69 @@
+
+#ifndef OPIETOOTH_RFCOMM_HELPER_H
+#define OPIETOOTH_RFCOMM_HELPER_H
+
+#include <sys/types.h>
+
+#include <qcstring.h>
+#include <qstring.h>
+
+namespace OpieTooth {
+    /**
+     * RfCommHelper helps to attach to a remote
+     * channel of a bt device.
+     * It uses the commandline tool rfcomm fo the job
+     * it tries to attach to afree node and either succeeds
+     * or fails.
+     * Later RfCommHelper can be used to detach the device
+     * from the remote device
+     */
+    class RfCommHelper {
+    public:
+        /**
+         * c'tor
+         */
+        RfCommHelper();
+
+        /**
+         * d'tor removes the device
+         */
+        ~RfCommHelper(); // kills the process
+
+        /**
+         * gives the device name of the attached device
+         */
+        QCString attachedDevice() const;
+
+        /**
+         * detach a device
+         * kills the rfcomm process
+         */
+        void detach();
+
+        /**
+         * tries to connect to a remote device
+         * @param bd_addr the bluetooth address
+         * @param port The port of the remote device
+         */
+        bool attach(const QString& bd_addr, int port );
+
+        /**
+         * If the original user of the bond exists
+         * it may regroup the rfcomm process
+         */
+        void regroup();
+    private:
+        bool connect( int dev, const QString& bdaddr, int port );
+        static void signal_handler(int);
+        void setupComChild();
+        bool m_connected:1;
+        static pid_t m_pid;
+        QCString m_device;
+        int m_fd[2];
+        int m_in2out[2];
+        int m_out2in[2];
+        static bool terminate ;
+    };
+};
+
+#endif