Fix: Do not send shutdown more than once

diff --git a/gatchat/gatmux.c b/gatchat/gatmux.c
index 0b42ebc..96576de 100644 (file)
--- a/gatchat/gatmux.c
+++ b/gatchat/gatmux.c
@@ -89,6 +89,7 @@ struct _GAtMux {
        void *driver_data;                      /* Driver data */
        char buf[MUX_BUFFER_SIZE];              /* Buffer on the main mux */
        int buf_used;                           /* Bytes of buf being used */
+       gboolean shutdown;
 };
 
 struct mux_setup_data {
@@ -545,6 +546,7 @@ GAtMux *g_at_mux_new(GIOChannel *channel, const GAtMuxDriver *driver)
 
        mux->ref_count = 1;
        mux->driver = driver;
+       mux->shutdown = TRUE;
 
        mux->channel = channel;
        g_io_channel_ref(channel);
@@ -596,6 +598,8 @@ gboolean g_at_mux_start(GAtMux *mux)
                                G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
                                                received_data, mux, NULL);
 
+       mux->shutdown = FALSE;
+
        return TRUE;
 }
 
@@ -603,6 +607,9 @@ gboolean g_at_mux_shutdown(GAtMux *mux)
 {
        int i;
 
+       if (mux->shutdown == TRUE)
+               return FALSE;
+
        if (mux->channel == NULL)
                return FALSE;
 
@@ -619,6 +626,8 @@ gboolean g_at_mux_shutdown(GAtMux *mux)
        if (mux->driver->shutdown)
                mux->driver->shutdown(mux);
 
+       mux->shutdown = TRUE;
+
        return TRUE;
 }