[PATCH 1/2] ubloxmodem: add Toby L2 gprs context driver

[Dragos Tatulea <dragos@endocode.com>]

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For now the driver works only with bridged mode for 2G/3G.

Once it activates the context it reads the ip, netmask,
gw, dns and sets them in the context settings.
---
 Makefile.am                       |   7 +
 drivers/ubloxmodem/gprs-context.c | 401 ++++++++++++++++++++++++++++++++++++++
 drivers/ubloxmodem/ubloxmodem.c   |  49 +++++
 drivers/ubloxmodem/ubloxmodem.h   |  25 +++
 4 files changed, 482 insertions(+)
 create mode 100644 drivers/ubloxmodem/gprs-context.c
 create mode 100644 drivers/ubloxmodem/ubloxmodem.c
 create mode 100644 drivers/ubloxmodem/ubloxmodem.h

diff --git a/Makefile.am b/Makefile.am
index 07624a9..68c03f6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -375,6 +375,13 @@ builtin_sources += drivers/atmodem/atutil.h \
 			drivers/speedupmodem/speedupmodem.c \
 			drivers/speedupmodem/ussd.c
 
+builtin_modules += ubloxmodem
+builtin_sources += drivers/atmodem/atutil.h \
+			drivers/ubloxmodem/ubloxmodem.h \
+			drivers/ubloxmodem/ubloxmodem.c \
+			drivers/ubloxmodem/gprs-context.c
+
+
 if PHONESIM
 builtin_modules += phonesim
 builtin_sources += plugins/phonesim.c
diff --git a/drivers/ubloxmodem/gprs-context.c b/drivers/ubloxmodem/gprs-context.c
new file mode 100644
index 0000000..a3d9743
--- /dev/null
+++ b/drivers/ubloxmodem/gprs-context.c
@@ -0,0 +1,401 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2016  EndoCode AG. 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 <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#include <glib.h>
+
+#include <ofono/log.h>
+#include <ofono/modem.h>
+#include <ofono/gprs-context.h>
+
+#include "gatchat.h"
+#include "gatresult.h"
+
+#include "ubloxmodem.h"
+
+static const char *none_prefix[] = { NULL };
+static const char *cgcontrdp_prefix[] = { "+CGCONTRDP:", NULL };
+
+struct gprs_context_data {
+	GAtChat *chat;
+	unsigned int active_context;
+	ofono_gprs_context_cb_t cb;
+	void *cb_data;
+};
+
+/*
+ * CGCONTRDP returns addr + netmask in the same string in the form
+ * of "a.b.c.d.m.m.m.m" for IPv4. IPv6 is not supported so we ignore it.
+ */
+static int set_address_and_netmask(struct ofono_gprs_context *gc,
+				const char *addrnetmask)
+{
+	char *dup = strdup(addrnetmask);
+	char *s = dup;
+
+	const char *addr = s;
+	const char *netmask = NULL;
+
+	int ret = -EINVAL;
+	int i;
+
+	/* Count 7 dots for ipv4, less or more means error. */
+	for (i = 0; i < 8; i++, s++) {
+		s = strchr(s, '.');
+
+		if (!s)
+			break;
+
+		if (i == 3) {
+			/* set netmask ptr and break the string */
+			netmask = s + 1;
+			s[0] = 0;
+		}
+	}
+
+	if (i == 7) {
+		ofono_gprs_context_set_ipv4_address(gc, addr, 1);
+		ofono_gprs_context_set_ipv4_netmask(gc, netmask);
+
+		ret = 0;
+	}
+
+	free(dup);
+
+	return ret;
+}
+
+static void set_gprs_context_interface(struct ofono_gprs_context *gc)
+{
+	struct ofono_modem *modem;
+	const char *interface;
+
+	/* read interface name read@detection time */
+	modem = ofono_gprs_context_get_modem(gc);
+	interface = ofono_modem_get_string(modem, "NetworkInterface");
+	ofono_gprs_context_set_interface(gc, interface);
+}
+
+static void cgcontrdp_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct ofono_gprs_context *gc = user_data;
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+	GAtResultIter iter;
+
+	const char *laddrnetmask = NULL;
+	const char *gw = NULL;
+	const char *dns[3] = { NULL, NULL, NULL };
+
+	DBG("ok %d", ok);
+
+	if (!ok) {
+		struct ofono_error error;
+
+		decode_at_error(&error, g_at_result_final_response(result));
+		gcd->cb(&error, gcd->cb_data);
+
+		return;
+	}
+
+	g_at_result_iter_init(&iter, result);
+
+	while (g_at_result_iter_next(&iter, "+CGCONTRDP:")) {
+		/* skip cid, bearer_id, apn */
+		g_at_result_iter_skip_next(&iter);
+		g_at_result_iter_skip_next(&iter);
+		g_at_result_iter_skip_next(&iter);
+
+		if (!g_at_result_iter_next_string(&iter, &laddrnetmask))
+			break;
+
+		if (!g_at_result_iter_next_string(&iter, &gw))
+			break;
+
+		if (!g_at_result_iter_next_string(&iter, &dns[0]))
+			break;
+
+		if (!g_at_result_iter_next_string(&iter, &dns[1]))
+			break;
+	}
+
+	set_gprs_context_interface(gc);
+
+	if (!laddrnetmask || set_address_and_netmask(gc, laddrnetmask) < 0) {
+		CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
+		return;
+	}
+
+	if (gw)
+		ofono_gprs_context_set_ipv4_gateway(gc, gw);
+
+	if (dns[0])
+		ofono_gprs_context_set_ipv4_dns_servers(gc, dns);
+
+	CALLBACK_WITH_SUCCESS(gcd->cb, gcd->cb_data);
+}
+
+static int ublox_send_cgcontrdp(struct ofono_gprs_context *gc)
+{
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+	char buf[64];
+
+	/* read ip configuration info */
+	snprintf(buf, sizeof(buf), "AT+CGCONTRDP=%u", gcd->active_context);
+	return g_at_chat_send(gcd->chat, buf, cgcontrdp_prefix,
+				cgcontrdp_cb, gc, NULL);
+}
+
+static void ublox_read_settings(struct ofono_gprs_context *gc)
+{
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+
+	if (ublox_send_cgcontrdp(gc) < 0)
+		CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
+}
+
+static void cgact_enable_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct ofono_gprs_context *gc = user_data;
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+
+	DBG("ok %d", ok);
+
+	if (!ok) {
+		struct ofono_error error;
+
+		gcd->active_context = 0;
+
+		decode_at_error(&error, g_at_result_final_response(result));
+		gcd->cb(&error, gcd->cb_data);
+
+		return;
+	}
+
+	ublox_read_settings(gc);
+}
+
+static void cgdcont_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct ofono_gprs_context *gc = user_data;
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+	char buf[64];
+
+	DBG("ok %d", ok);
+
+	if (!ok) {
+		struct ofono_error error;
+
+		gcd->active_context = 0;
+
+		decode_at_error(&error, g_at_result_final_response(result));
+		gcd->cb(&error, gcd->cb_data);
+
+		return;
+	}
+
+	snprintf(buf, sizeof(buf), "AT+CGACT=1,%u", gcd->active_context);
+
+	if (g_at_chat_send(gcd->chat, buf, none_prefix,
+				cgact_enable_cb, gc, NULL))
+		return;
+
+	CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
+}
+
+static void ublox_send_cgdcont(struct ofono_gprs_context *gc, const char *apn)
+{
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+	char buf[OFONO_GPRS_MAX_APN_LENGTH + 128];
+	int len;
+
+	len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IP\"",
+				gcd->active_context);
+
+	if (apn)
+		snprintf(buf + len, sizeof(buf) - len - 3, ",\"%s\"", apn);
+
+	if (g_at_chat_send(gcd->chat, buf, none_prefix,
+				cgdcont_cb, gc, NULL) > 0)
+		return;
+
+	CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
+}
+
+static void ublox_gprs_activate_primary(struct ofono_gprs_context *gc,
+				const struct ofono_gprs_primary_context *ctx,
+				ofono_gprs_context_cb_t cb, void *data)
+{
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+
+	/* IPv6 support not implemented */
+	if (ctx->proto != OFONO_GPRS_PROTO_IP) {
+		CALLBACK_WITH_FAILURE(cb, data);
+		return;
+	}
+
+	DBG("cid %u", ctx->cid);
+
+	gcd->active_context = ctx->cid;
+
+	if (!gcd->active_context) {
+		ofono_error("can't activate more contexts");
+		CALLBACK_WITH_FAILURE(cb, data);
+		return;
+	}
+
+	gcd->cb = cb;
+	gcd->cb_data = data;
+
+	ublox_send_cgdcont(gc, ctx->apn);
+}
+
+static void cgact_disable_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct ofono_gprs_context *gc = user_data;
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+
+	DBG("ok %d", ok);
+
+	if (!ok) {
+		CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
+		return;
+	}
+
+	gcd->active_context = 0;
+
+	CALLBACK_WITH_SUCCESS(gcd->cb, gcd->cb_data);
+}
+
+static void ublox_gprs_deactivate_primary(struct ofono_gprs_context *gc,
+					unsigned int cid,
+					ofono_gprs_context_cb_t cb, void *data)
+{
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+	char buf[64];
+
+	DBG("cid %u", cid);
+
+	gcd->cb = cb;
+	gcd->cb_data = data;
+
+	snprintf(buf, sizeof(buf), "AT+CGACT=0,%u", gcd->active_context);
+	g_at_chat_send(gcd->chat, buf, none_prefix,
+			cgact_disable_cb, gc, NULL);
+}
+
+static void cgev_notify(GAtResult *result, gpointer user_data)
+{
+	struct ofono_gprs_context *gc = user_data;
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+	GAtResultIter iter;
+	const char *event;
+	gint cid;
+
+	g_at_result_iter_init(&iter, result);
+
+	if (!g_at_result_iter_next(&iter, "+CGEV:"))
+		return;
+
+	if (!g_at_result_iter_next_unquoted_string(&iter, &event))
+		return;
+
+	if (g_str_has_prefix(event, "NW PDN DEACT")) {
+		if (!g_at_result_iter_skip_next(&iter))
+			return;
+	} else if (g_str_has_prefix(event, "NW DEACT") == FALSE)
+		return;
+
+	if (!g_at_result_iter_skip_next(&iter))
+		return;
+
+	if (!g_at_result_iter_next_number(&iter, &cid))
+		return;
+
+	DBG("cid %d", cid);
+
+	if ((unsigned int) cid != gcd->active_context)
+		return;
+
+	ofono_gprs_context_deactivated(gc, gcd->active_context);
+	gcd->active_context = 0;
+}
+
+static int ublox_gprs_context_probe(struct ofono_gprs_context *gc,
+					unsigned int vendor, void *data)
+{
+	GAtChat *chat = data;
+	struct gprs_context_data *gcd;
+
+	DBG("");
+
+	gcd = g_try_new0(struct gprs_context_data, 1);
+	if (gcd == NULL)
+		return -ENOMEM;
+
+	gcd->chat = g_at_chat_clone(chat);
+
+	ofono_gprs_context_set_data(gc, gcd);
+
+	g_at_chat_register(chat, "+CGEV:", cgev_notify, FALSE, gc, NULL);
+
+	return 0;
+}
+
+static void ublox_gprs_context_remove(struct ofono_gprs_context *gc)
+{
+	struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+
+	DBG("");
+
+	ofono_gprs_context_set_data(gc, NULL);
+
+	g_at_chat_unref(gcd->chat);
+
+	memset(gcd, 0, sizeof(*gcd));
+}
+
+static struct ofono_gprs_context_driver driver = {
+	.name			= "ubloxmodem",
+	.probe			= ublox_gprs_context_probe,
+	.remove			= ublox_gprs_context_remove,
+	.activate_primary	= ublox_gprs_activate_primary,
+	.deactivate_primary	= ublox_gprs_deactivate_primary,
+};
+
+void ublox_gprs_context_init(void)
+{
+	ofono_gprs_context_driver_register(&driver);
+}
+
+void ublox_gprs_context_exit(void)
+{
+	ofono_gprs_context_driver_unregister(&driver);
+}
diff --git a/drivers/ubloxmodem/ubloxmodem.c b/drivers/ubloxmodem/ubloxmodem.c
new file mode 100644
index 0000000..7fc671e
--- /dev/null
+++ b/drivers/ubloxmodem/ubloxmodem.c
@@ -0,0 +1,49 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2016  Endocode AG. 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
+
+#include <glib.h>
+#include <gatchat.h>
+
+#define OFONO_API_SUBJECT_TO_CHANGE
+#include <ofono/plugin.h>
+#include <ofono/types.h>
+
+#include "ubloxmodem.h"
+
+static int ubloxmodem_init(void)
+{
+	ublox_gprs_context_init();
+
+	return 0;
+}
+
+static void ubloxmodem_exit(void)
+{
+	ublox_gprs_context_exit();
+}
+
+OFONO_PLUGIN_DEFINE(ubloxmodem, "U-Blox Toby L2 high speed modem driver",
+			VERSION, OFONO_PLUGIN_PRIORITY_DEFAULT,
+			ubloxmodem_init, ubloxmodem_exit)
diff --git a/drivers/ubloxmodem/ubloxmodem.h b/drivers/ubloxmodem/ubloxmodem.h
new file mode 100644
index 0000000..0c8a621
--- /dev/null
+++ b/drivers/ubloxmodem/ubloxmodem.h
@@ -0,0 +1,25 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2016  Endocode AG. 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
+ *
+ */
+
+#include <drivers/atmodem/atutil.h>
+
+extern void ublox_gprs_context_init(void);
+extern void ublox_gprs_context_exit(void);
-- 
2.5.0