Hi Sebastian,

On 08/30/2017 11:30 AM, Sebastian Arnd wrote:
diff --git a/drivers/gemaltomodem/gemaltomodem.c 
b/drivers/gemaltomodem/gemaltomodem.c
index 91cf238..01bdb43 100644
--- a/drivers/gemaltomodem/gemaltomodem.c
+++ b/drivers/gemaltomodem/gemaltomodem.c
@@ -35,6 +35,7 @@
  static int gemaltomodem_init(void)
  {
        gemalto_location_reporting_init();
+       gemaltowwan_gprs_context_init();
return 0;
  }
@@ -42,6 +43,8 @@ static int gemaltomodem_init(void)
  static void gemaltomodem_exit(void)
  {
        gemalto_location_reporting_exit();
+       gemaltowwan_gprs_context_exit();
+

No need for this extra empty line

  }
OFONO_PLUGIN_DEFINE(gemaltomodem, "Gemalto modem driver", VERSION,
diff --git a/drivers/gemaltomodem/gemaltomodem.h 
b/drivers/gemaltomodem/gemaltomodem.h
index 7ea1e8f..3ec2380 100644
--- a/drivers/gemaltomodem/gemaltomodem.h
+++ b/drivers/gemaltomodem/gemaltomodem.h
@@ -21,5 +21,8 @@
#include <drivers/atmodem/atutil.h> -extern void gemalto_location_reporting_init();
-extern void gemalto_location_reporting_exit();
+extern void gemalto_location_reporting_init(void);
+extern void gemalto_location_reporting_exit(void);
+extern void gemaltowwan_gprs_context_init(void);
+extern void gemaltowwan_gprs_context_exit(void);
+

Extra empty line here as well

diff --git a/drivers/gemaltomodem/gprs-context-wwan.c 
b/drivers/gemaltomodem/gprs-context-wwan.c
new file mode 100644
index 0000000..d87e12f
--- /dev/null
+++ b/drivers/gemaltomodem/gprs-context-wwan.c
@@ -0,0 +1,436 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2017 Piotr Haber, Sebastian Arnd. 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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <glib.h>
+
+#include <ofono/log.h>
+#include <ofono/modem.h>
+#include <ofono/gprs-context.h>
+
+#include "gatchat.h"
+#include "gatresult.h"
+
+#include "gemaltomodem.h"
+
+static const char *none_prefix[] = { NULL };
+static const char *cgpaddr_prefix[] = { "+CGPADDR:", NULL };
+static const char *cgcontrdp_prefix[] = { "+CGCONTRDP:", NULL };
+
+enum state {
+       STATE_IDLE,
+       STATE_ENABLING,
+       STATE_DISABLING,
+       STATE_ACTIVE,
+};
+
+enum auth_method {
+       AUTH_METHOD_NONE,
+       AUTH_METHOD_PAP,
+       AUTH_METHOD_CHAP,
+};
+
+struct gprs_context_data {
+       GAtChat *chat;
+       unsigned int active_context;
+       char username[OFONO_GPRS_MAX_USERNAME_LENGTH + 1];
+       char password[OFONO_GPRS_MAX_PASSWORD_LENGTH + 1];
+       enum auth_method auth_method;
+       enum state state;
+       enum ofono_gprs_proto proto;
+       char address[64];
+       char netmask[64];
+       char gateway[64];
+       char dns1[64];
+       char dns2[64];
+       ofono_gprs_context_cb_t cb;
+       void *cb_data;
+};
+
+static void failed_setup(struct ofono_gprs_context *gc,
+                               GAtResult *result, gboolean deactivate)
+{
+       struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
+       struct ofono_error error;
+       char buf[64];
+
+       DBG("deactivate %d", deactivate);
+
+       if (deactivate == TRUE) {
+               sprintf(buf, "AT^SWWAN=0,%u", gcd->active_context);
+               g_at_chat_send(gcd->chat, buf, none_prefix, NULL, NULL, NULL);
+       }
+
+       gcd->active_context = 0;
+       gcd->state = STATE_IDLE;
+
+       if (result == NULL) {
+               CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
+               return;
+       }
+
+       decode_at_error(&error, g_at_result_final_response(result));
+       gcd->cb(&error, gcd->cb_data);
+}
+
+static void contrdp_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);
+       struct ofono_modem *modem;
+       int cid;
+       const char *interface;
+       GAtResultIter iter;
+       gboolean found = FALSE;
+
+       DBG("ok %d", ok);
+
+       if (!ok) {
+               ofono_error("Unable to get context dynamic paramerers");
+               failed_setup(gc, result, TRUE);
+               return;
+       }
+
+       /*
+        * We're not getting any parameters here as all configuration is done
+        * via dhcp.
+        */

If you want ConnMan to obtain DNS, Netmask, Gateway, etc via DHCP, then ofono_gprs_context_set_ipv4_address should not be used. This forces 'IPv4.Method' to be 'dhcp' instead of 'static'.

Relying on DHCP is fine, but you pay a bit of extra latency. So if your modem provides this info via +CGCONTRDP, I would use that.

If you do decide to use DHCP only, is calling +CGPADDR & +CGCONTRDP even necessary?

+
+       g_at_result_iter_init(&iter, result);
+
+       while (g_at_result_iter_next(&iter, "+CGCONTRDP:")) {
+               if (!g_at_result_iter_next_number(&iter, &cid))
+                       goto error;
+
+               if ((unsigned int) cid == gcd->active_context)
+                       found = TRUE;
+       }
+
+       if (found == FALSE)
+               goto error;
+
+       gcd->state = STATE_ACTIVE;
+
+       modem = ofono_gprs_context_get_modem(gc);
+       interface = ofono_modem_get_string(modem, "NetworkInterface");
+
+       ofono_gprs_context_set_interface(gc, interface);
+       ofono_gprs_context_set_ipv4_address(gc, gcd->address, FALSE);
+
+       CALLBACK_WITH_SUCCESS(gcd->cb, gcd->cb_data);
+       return;
+
+error:
+       failed_setup(gc, NULL, TRUE);
+}
+
+static void address_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);
+       int cid;
+       const char *address;
+       char buf[64];
+       GAtResultIter iter;
+
+       DBG("ok %d", ok);
+
+       if (!ok) {
+               ofono_error("Unable to get context address");
+               failed_setup(gc, result, TRUE);
+               return;
+       }
+
+       g_at_result_iter_init(&iter, result);
+
+       if (!g_at_result_iter_next(&iter, "+CGPADDR:"))
+               goto error;
+
+       if (!g_at_result_iter_next_number(&iter, &cid))
+               goto error;
+
+       if ((unsigned int) cid != gcd->active_context)
+               goto error;
+
+       if (!g_at_result_iter_next_string(&iter, &address))
+               goto error;
+
+       strncpy(gcd->address, address, sizeof(gcd->address));
+       sprintf(buf, "AT+CGCONTRDP=%d", gcd->active_context);
+
+       if (g_at_chat_send(gcd->chat, buf, cgcontrdp_prefix,
+                                       contrdp_cb, gc, NULL) > 0)
+               return;
+
+error:
+       failed_setup(gc, NULL, TRUE);
+}
+
+static void activate_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) {
+               ofono_error("Unable to activate context");
+               failed_setup(gc, result, FALSE);
+               return;
+       }
+
+       sprintf(buf, "AT+CGPADDR=%u", gcd->active_context);
+       if (g_at_chat_send(gcd->chat, buf, cgpaddr_prefix,
+                                       address_cb, gc, NULL) > 0)
+               return;
+
+       failed_setup(gc, NULL, TRUE);
+}
+
+static void setup_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[384];
+
+       DBG("ok %d", ok);
+
+       if (!ok) {
+               ofono_error("Failed to setup context");
+               failed_setup(gc, result, FALSE);
+               return;
+       }
+
+       if (gcd->username[0] && gcd->password[0])
+               sprintf(buf, "AT^SGAUTH=%u,%u,\"%s\",\"%s\"",
+                       gcd->active_context, gcd->auth_method,
+                       gcd->username, gcd->password);
+       else
+               sprintf(buf, "AT^SGAUTH=%u,0", gcd->active_context);
+
+       if (g_at_chat_send(gcd->chat, buf, none_prefix, NULL, NULL, NULL) == 0)
+               goto error;
+
+       sprintf(buf, "AT^SWWAN=1,%u", gcd->active_context);
+
+       if (g_at_chat_send(gcd->chat, buf, none_prefix,
+                                               activate_cb, gc, NULL) > 0)
+               return;
+
+

No double empty lines please

+error:
+       failed_setup(gc, NULL, FALSE);
+}
+
+static void gemaltowwan_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);
+       char buf[OFONO_GPRS_MAX_APN_LENGTH + 128];
+       int len = 0;
+
+       DBG("cid %u", ctx->cid);
+
+       gcd->active_context = ctx->cid;
+       gcd->cb = cb;
+       gcd->cb_data = data;
+       memcpy(gcd->username, ctx->username, sizeof(ctx->username));
+       memcpy(gcd->password, ctx->password, sizeof(ctx->password));
+       gcd->state = STATE_ENABLING;
+       gcd->proto = ctx->proto;
+
+       /* We only support CHAP and PAP */
+       switch (ctx->auth_method) {
+       case OFONO_GPRS_AUTH_METHOD_CHAP:
+               gcd->auth_method = AUTH_METHOD_CHAP;
+               break;
+       case OFONO_GPRS_AUTH_METHOD_PAP:
+               gcd->auth_method = AUTH_METHOD_PAP;
+               break;
+       default:
+               goto error;
+       }
+
+       switch (ctx->proto) {
+       case OFONO_GPRS_PROTO_IP:
+               len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IP\"",
+                                                               ctx->cid);
+               break;
+       case OFONO_GPRS_PROTO_IPV6:
+               len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IPV6\"",
+                                                               ctx->cid);
+               break;
+       case OFONO_GPRS_PROTO_IPV4V6:
+               len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IPV4V6\"",
+                                                               ctx->cid);
+               break;

You don't actually handle IPv6 or dual-stack contexts up above, e.g. you only ever set the IPv4 address...

+       }
+
+       if (ctx->apn)
+               snprintf(buf + len, sizeof(buf) - len - 3,
+                                       ",\"%s\"", ctx->apn);
+
+       if (g_at_chat_send(gcd->chat, buf, none_prefix,
+                               setup_cb, gc, NULL) > 0)
+               return;
+
+error:
+       CALLBACK_WITH_FAILURE(cb, data);
+}
+
+static void deactivate_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);
+
+       gcd->active_context = 0;
+       gcd->state = STATE_IDLE;
+
+       CALLBACK_WITH_SUCCESS(gcd->cb, gcd->cb_data);
+}
+
+static void gemaltowwan_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->state = STATE_DISABLING;
+       gcd->cb = cb;
+       gcd->cb_data = data;
+
+       sprintf(buf, "AT^SWWAN=0,%u", gcd->active_context);
+
+       if (g_at_chat_send(gcd->chat, buf, none_prefix,
+                               deactivate_cb, gc, NULL) > 0)
+               return;
+
+       CALLBACK_WITH_SUCCESS(cb, data);
+}
+
+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);
+       const char *event;
+       int cid;
+       GAtResultIter iter;
+
+       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 DEACT") &&
+                       !g_str_has_prefix(event, "ME DEACT") &&
+                       !g_str_has_prefix(event, "PDN DEACT"))
+               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;
+       gcd->state = STATE_IDLE;
+}
+
+static int gemaltowwan_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 gemaltowwan_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);
+       g_free(gcd);
+}
+
+static void gemaltowwan_gprs_detach_shutdown(struct ofono_gprs_context *gc,
+                                       unsigned int cid)
+{
+       ofono_gprs_context_deactivated(gc, cid);
+}
+
+static struct ofono_gprs_context_driver driver = {
+       .name                   = "gemaltowwanmodem",
+       .probe                  = gemaltowwan_gprs_context_probe,
+       .remove                 = gemaltowwan_gprs_context_remove,
+       .activate_primary       = gemaltowwan_gprs_activate_primary,
+       .deactivate_primary     = gemaltowwan_gprs_deactivate_primary,
+       .detach_shutdown        = gemaltowwan_gprs_detach_shutdown,

PLS8 seems to be an LTE device. Do you handle network initiated bearers or default attach bearers? If so, .read_settings should probably be implemented.

+};
+
+void gemaltowwan_gprs_context_init(void)
+{
+       ofono_gprs_context_driver_register(&driver);
+}
+
+void gemaltowwan_gprs_context_exit(void)
+{
+       ofono_gprs_context_driver_unregister(&driver);
+}


Regards,
-Denis
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