[PATCH] gatio: do not read if no read_handler

[Denis Kenzior]

Hi Kristen,

> If no read_handler specified, leave data alone in case someone
> else wants to read it.
> ---
>  gatchat/gatio.c   |    4 ++++
>  gatchat/gsmdial.c |   12 ++++--------
>  2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/gatchat/gatio.c b/gatchat/gatio.c
> index 61b0260..b4a3806 100644
> --- a/gatchat/gatio.c
> +++ b/gatchat/gatio.c
> @@ -91,6 +91,10 @@ static gboolean received_data(GIOChannel *channel,
>  GIOCondition cond, if (cond & G_IO_NVAL)
>  		return FALSE;
> 
> +	/* if nobody wants this data, leave it alone */
> +	if (io->read_handler == NULL)
> +		return TRUE;
> +

This is a really bad idea, we should never have cases where the read handler 
is unset, and if we do we should end up closing the socket when the buffer is 
full.

>  	/* Regardless of condition, try to read all the data available */
>  	do {
>  		toread = ring_buffer_avail_no_wrap(io->buf);
> diff --git a/gatchat/gsmdial.c b/gatchat/gsmdial.c
> index a531aa3..5fb406d 100644
> --- a/gatchat/gsmdial.c
> +++ b/gatchat/gsmdial.c
> @@ -235,6 +235,8 @@ static void ppp_connect(const char *iface, const char
>  *ip, static void ppp_disconnect(GAtPPPDisconnectReason reason, gpointer
>  user_data) {
>  	g_print("PPP Link down: %d\n", reason);
> +	g_at_chat_resume(control);
> +	g_at_chat_resume(modem);
>  }
> 
>  static void connect_cb(gboolean ok, GAtResult *result, gpointer user_data)
> @@ -249,14 +251,8 @@ static void connect_cb(gboolean ok, GAtResult *result,
>  gpointer user_data) /* get the data IO channel */
>  	channel = g_at_chat_get_channel(modem);
> 
> -	/*
> -	 * shutdown gatchat or else it tries to take all the input
> -	 * from the modem and does not let PPP get it.
> -	 */
> -	g_at_chat_unref(control);
> -	control = NULL;
> -	g_at_chat_unref(modem);
> -	modem = NULL;
> +	g_at_chat_suspend(control);
> +	g_at_chat_suspend(modem);
> 

Please send gsmdial patches separately.  Also, can you make g_at_ppp use the 
new_from_io constructor?  In that case you don't need the gatio modifications 
above.

>  	/* open ppp */
>  	ppp = g_at_ppp_new(channel);
> 

Regards,
-Denis