Re: [PATCH] rilmodem: add cell broadcast message support

[Denis Kenzior <denkenz@gmail.com>]

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Hi Caiwen,

On 05/17/2016 09:39 PM, caiwen.zhang(a)intel.com wrote:
> From: Caiwen Zhang <caiwen.zhang@intel.com>
>
> ---
>   Makefile.am                 |   1 +
>   drivers/rilmodem/cbs.c      | 222 ++++++++++++++++++++++++++++++++++++++++++++
>   drivers/rilmodem/rilmodem.c |   2 +
>   drivers/rilmodem/rilmodem.h |   3 +
>   4 files changed, 228 insertions(+)
>   create mode 100644 drivers/rilmodem/cbs.c
>
> diff --git a/Makefile.am b/Makefile.am
> index 8ab9851..7838d2b 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -152,6 +152,7 @@ builtin_sources += drivers/rilmodem/rilmodem.h \
>   			drivers/rilmodem/call-barring.c \
>   			drivers/rilmodem/netmon.c \
>   			drivers/rilmodem/stk.c \
> +			drivers/rilmodem/cbs.c \
>   			drivers/infineonmodem/infineon_constants.h
>   endif
>
> diff --git a/drivers/rilmodem/cbs.c b/drivers/rilmodem/cbs.c
> new file mode 100644
> index 0000000..6505616
> --- /dev/null
> +++ b/drivers/rilmodem/cbs.c
> @@ -0,0 +1,222 @@
> +/*
> + *
> + *  oFono - Open Source Telephony
> + *
> + *  Copyright (C) 2008-2016  Intel Corporation. All rights reserved.
> + *
> + *  This program is free software; you can redistribute it and/or modify
> + *  it under the terms of the GNU General Public License version 2 as
> + *  published by the Free Software Foundation.
> + *
> + *  This program is distributed in the hope that it will be useful,
> + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *  GNU General Public License for more details.
> + *
> + *  You should have received a copy of the GNU General Public License
> + *  along with this program; if not, write to the Free Software
> + *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
> + *
> + */
> +
> +#ifdef HAVE_CONFIG_H
> +#include <config.h>
> +#endif
> +
> +#define _GNU_SOURCE
> +#include <string.h>
> +#include <stdio.h>
> +#include <ctype.h>
> +
> +#include <glib.h>
> +
> +#include <ofono/log.h>
> +#include <ofono/modem.h>
> +#include <ofono/cbs.h>
> +#include "util.h"
> +
> +#include <gril.h>
> +#include <parcel.h>
> +
> +#include "rilmodem.h"
> +#include "vendor.h"
> +
> +struct cbs_data {
> +	GRil *ril;
> +	unsigned int vendor;
> +};
> +
> +static void ril_cbs_set_cb(struct ril_msg *message, gpointer user_data)
> +{
> +	struct cb_data *cbd = user_data;
> +	ofono_cbs_set_cb_t cb = cbd->cb;
> +	struct cbs_data *cd = cbd->user;
> +
> +	if (message->error == RIL_E_SUCCESS) {
> +		CALLBACK_WITH_SUCCESS(cb, cbd->data);
> +	} else {
> +		ofono_error("%s RILD reply failure: %s",
> +			g_ril_request_id_to_string(cd->ril, message->req),
> +			ril_error_to_string(message->error));
> +		CALLBACK_WITH_FAILURE(cb, cbd->data);
> +	}
> +}
> +
> +static void ril_cbs_set_topics(struct ofono_cbs *cbs, const char *topics,
> +					ofono_cbs_set_cb_t cb, void *user_data)
> +{
> +	struct cbs_data *cd = ofono_cbs_get_data(cbs);
> +	struct cb_data *cbd = cb_data_new(cb, user_data, cd);
> +	int count = 0, from, to;
> +	const char *p = topics;
> +	const char *pto;
> +	struct parcel rilp;
> +
> +	while (p) {
> +		count++;
> +		p = strchr(p, ',');
> +		if (p)
> +			p++;
> +	}
> +

It might be simpler to just use g_strsplit here and free the result 
after the parcel has been built.

> +	p = topics;
> +	if (count > 0) {
> +		if (atoi(p) == 0 && strchr(p, '0') == NULL) /* empty string */
> +			count--;
> +	}

The passed in string should not contain any ',' at the very end.  So I'm 
not sure if this check is really necessary?

> +
> +	parcel_init(&rilp);
> +	parcel_w_int32(&rilp, count);
> +
> +	while (count > 0) {
> +		from = atoi(p);
> +		to = from;
> +
> +		pto = strchr(p, '-');
> +		if (pto)
> +			to = atoi(pto + 1);
> +
> +		parcel_w_int32(&rilp, from);
> +		parcel_w_int32(&rilp, to);
> +
> +		parcel_w_int32(&rilp, 0);
> +		parcel_w_int32(&rilp, 0xFF);
> +
> +		parcel_w_int32(&rilp, 1);
> +
> +		count--;
> +		p = strchr(p, ',');
> +		p++;
> +	}
> +
> +	if (g_ril_send(cd->ril, RIL_REQUEST_GSM_SET_BROADCAST_SMS_CONFIG, &rilp,
> +			ril_cbs_set_cb, cbd, g_free) > 0)
> +		return;
> +
> +	g_free(cbd);
> +	CALLBACK_WITH_FAILURE(cb, user_data);
> +}
> +
> +static void ril_cbs_clear_topics(struct ofono_cbs *cbs,
> +					ofono_cbs_set_cb_t cb, void *user_data)
> +{
> +	ril_cbs_set_topics(cbs, "", cb, user_data);
> +}
> +
> +static void ril_cbs_received(struct ril_msg *message, gpointer user_data)
> +{
> +	struct ofono_cbs *cbs = user_data;
> +	struct cbs_data *cd = ofono_cbs_get_data(cbs);
> +	struct parcel rilp;
> +	int pdulen;
> +	unsigned char *pdu;
> +
> +	g_ril_print_unsol_no_args(cd->ril, message);
> +
> +	DBG("req: %d; data_len: %d", message->req, (int) message->buf_len);
> +
> +	g_ril_init_parcel(message, &rilp);
> +	pdu = parcel_r_raw(&rilp, &pdulen);
> +
> +	if (!pdu || pdulen != 88) {
> +		ofono_error("%s: it isn't a gsm cell broadcast msg", __func__);
> +		return;
> +	}
> +
> +	ofono_cbs_notify(cbs, pdu, pdulen);
> +	g_free(pdu);
> +}
> +
> +static void ril_cbs_register(const struct ofono_error *error, void *data)
> +{
> +	struct ofono_cbs *cbs = data;
> +	struct cbs_data *cd = ofono_cbs_get_data(cbs);
> +
> +	g_ril_register(cd->ril, RIL_UNSOL_RESPONSE_NEW_BROADCAST_SMS,
> +					ril_cbs_received, cbs);
> +
> +	ofono_cbs_register(cbs);
> +}
> +
> +static void get_cbs_config_cb(struct ril_msg *message,
> +					gpointer user_data)
> +{
> +	struct ofono_cbs *cbs = user_data;
> +
> +	if (message->error != RIL_E_SUCCESS) {
> +		ofono_error("%s: RIL error %s", __func__,
> +				ril_error_to_string(message->error));
> +		ofono_cbs_remove(cbs);
> +		return;
> +	}
> +
> +	ril_cbs_clear_topics(cbs, ril_cbs_register, cbs);
> +}
> +
> +static int ril_cbs_probe(struct ofono_cbs *cbs, unsigned int vendor,
> +				void *user)
> +{
> +	GRil *ril = user;
> +	struct cbs_data *data;
> +
> +	data = g_new0(struct cbs_data, 1);
> +	data->ril = g_ril_clone(ril);
> +	data->vendor = vendor;
> +
> +	ofono_cbs_set_data(cbs, data);
> +
> +	if (g_ril_send(ril, RIL_REQUEST_GSM_GET_BROADCAST_SMS_CONFIG, NULL,
> +			get_cbs_config_cb, cbs, NULL) == 0) {
> +		ofono_error("%s: send failed", __func__);
> +	}

Don't use parentheses around simple expressions.

> +
> +	return 0;
> +}
> +
> +static void ril_cbs_remove(struct ofono_cbs *cbs)
> +{
> +	struct cbs_data *data = ofono_cbs_get_data(cbs);
> +
> +	ofono_cbs_set_data(cbs, NULL);
> +
> +	g_ril_unref(data->ril);
> +	g_free(data);
> +}
> +
> +static struct ofono_cbs_driver driver = {
> +	.name = RILMODEM,
> +	.probe = ril_cbs_probe,
> +	.remove = ril_cbs_remove,
> +	.set_topics = ril_cbs_set_topics,
> +	.clear_topics = ril_cbs_clear_topics,
> +};
> +
> +void ril_cbs_init(void)
> +{
> +	ofono_cbs_driver_register(&driver);
> +}
> +
> +void ril_cbs_exit(void)
> +{
> +	ofono_cbs_driver_unregister(&driver);
> +}
> diff --git a/drivers/rilmodem/rilmodem.c b/drivers/rilmodem/rilmodem.c
> index 9a063a2..ace1621 100644
> --- a/drivers/rilmodem/rilmodem.c
> +++ b/drivers/rilmodem/rilmodem.c
> @@ -53,6 +53,7 @@ static int rilmodem_init(void)
>   	ril_call_barring_init();
>   	ril_netmon_init();
>   	ril_stk_init();
> +	ril_cbs_init();
>
>   	return 0;
>   }
> @@ -76,6 +77,7 @@ static void rilmodem_exit(void)
>   	ril_call_barring_exit();
>   	ril_netmon_exit();
>   	ril_stk_exit();
> +	ril_cbs_exit();
>   }
>
>   OFONO_PLUGIN_DEFINE(rilmodem, "RIL modem driver", VERSION,
> diff --git a/drivers/rilmodem/rilmodem.h b/drivers/rilmodem/rilmodem.h
> index 7e47573..cde955e 100644
> --- a/drivers/rilmodem/rilmodem.h
> +++ b/drivers/rilmodem/rilmodem.h
> @@ -75,3 +75,6 @@ extern void ril_netmon_exit(void);
>
>   extern void ril_stk_init(void);
>   extern void ril_stk_exit(void);
> +
> +extern void ril_cbs_init(void);
> +extern void ril_cbs_exit(void);
>

Regards,
-Denis