Hi Guillaume,

On 05/04/2011 10:39 AM, Guillaume Zajac wrote:
> ---
>  gatchat/gatppp.c |   35 +++++++++++++++++++++++++++++++++++
>  gatchat/gatppp.h |    1 +
>  2 files changed, 36 insertions(+), 0 deletions(-)
> 
> diff --git a/gatchat/gatppp.c b/gatchat/gatppp.c
> index c776811..67f0a28 100644
> --- a/gatchat/gatppp.c
> +++ b/gatchat/gatppp.c
> @@ -46,6 +46,9 @@
>  #define PPP_ADDR_FIELD	0xff
>  #define PPP_CTRL	0x03
>  
> +/* Time to wait before and after +++ sequence */
> +#define GUARD_TIMEOUTS 1500
> +
>  enum ppp_phase {
>  	PPP_PHASE_DEAD = 0,		/* Link dead */
>  	PPP_PHASE_ESTABLISHMENT,	/* LCP started */
> @@ -500,6 +503,38 @@ void g_at_ppp_shutdown(GAtPPP *ppp)
>  	pppcp_signal_close(ppp->lcp);
>  }
>  
> +static gboolean call_suspend_cb(gpointer user_data)
> +{
> +	GAtPPP *ppp = user_data;
> +
> +	if (ppp->suspend_func)
> +		ppp->suspend_func(ppp->suspend_data);
> +
> +	return FALSE;
> +}
> +
> +static gboolean send_escape_sequence(gpointer user_data)
> +{
> +	GAtPPP *ppp = user_data;
> +	GAtIO *io = g_at_hdlc_get_io(ppp->hdlc);
> +
> +	g_at_io_write(io, "+++", 3);
> +
> +	g_timeout_add(GUARD_TIMEOUTS, call_suspend_cb, ppp);

Please make sure to track this GSource and remove it in case ppp is ever
forcefully removed.  Remember, we're writing a library and you must make
sure to clean up after yourself.

> +
> +	return FALSE;
> +}
> +
> +void g_at_ppp_suspend(GAtPPP *ppp)
> +{
> +	if (ppp == NULL)
> +		return;
> +
> +	ppp_net_suspend_interface(ppp->net);
> +	g_at_hdlc_suspend(ppp->hdlc);
> +	g_timeout_add(GUARD_TIMEOUTS, send_escape_sequence, ppp);
> +}
> +
>  void g_at_ppp_ref(GAtPPP *ppp)
>  {
>  	g_atomic_int_inc(&ppp->ref_count);
> diff --git a/gatchat/gatppp.h b/gatchat/gatppp.h
> index 9464ffd..66e0ade 100644
> --- a/gatchat/gatppp.h
> +++ b/gatchat/gatppp.h
> @@ -64,6 +64,7 @@ void g_at_ppp_set_suspend_function(GAtPPP *ppp, GAtSuspendFunc func,
>  					gpointer user_data);
>  void g_at_ppp_set_debug(GAtPPP *ppp, GAtDebugFunc func, gpointer user_data);
>  void g_at_ppp_shutdown(GAtPPP *ppp);
> +void g_at_ppp_suspend(GAtPPP *ppp);
>  void g_at_ppp_ref(GAtPPP *ppp);
>  void g_at_ppp_unref(GAtPPP *ppp);
>  

Is a _resume version of this patch forthcoming?

Regards,
-Denis