mirror of git://git.sysmocom.de/ofono
512 lines
12 KiB
C
512 lines
12 KiB
C
/*
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*
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* oFono - Open Source Telephony
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*
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* Copyright (C) 2008-2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <glib.h>
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#include <ofono/log.h>
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#include <ofono/modem.h>
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#include <ofono/gprs-context.h>
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#include "gatchat.h"
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#include "gatresult.h"
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#include "gatppp.h"
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#include "atmodem.h"
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#include "vendor.h"
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#define TUN_DEV "/dev/net/tun"
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#define STATIC_IP_NETMASK "255.255.255.255"
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static const char *cgdata_prefix[] = { "+CGDATA:", NULL };
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static const char *none_prefix[] = { NULL };
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enum state {
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STATE_IDLE,
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STATE_ENABLING,
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STATE_DISABLING,
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STATE_ACTIVE,
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};
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struct gprs_context_data {
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GAtChat *chat;
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unsigned int active_context;
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GAtPPPAuthMethod auth_method;
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char username[OFONO_GPRS_MAX_USERNAME_LENGTH + 1];
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char password[OFONO_GPRS_MAX_PASSWORD_LENGTH + 1];
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GAtPPP *ppp;
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enum state state;
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ofono_gprs_context_cb_t cb;
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void *cb_data; /* Callback data */
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unsigned int vendor;
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gboolean use_atd99;
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};
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static void ppp_debug(const char *str, void *data)
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{
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ofono_info("%s: %s", (const char *) data, str);
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}
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static void ppp_connect(const char *interface, const char *local,
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const char *remote,
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const char *dns1, const char *dns2,
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gpointer user_data)
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{
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struct ofono_gprs_context *gc = user_data;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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const char *dns[3];
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DBG("");
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dns[0] = dns1;
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dns[1] = dns2;
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dns[2] = 0;
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ofono_info("IP: %s", local);
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ofono_info("DNS: %s, %s", dns1, dns2);
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gcd->state = STATE_ACTIVE;
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ofono_gprs_context_set_interface(gc, interface);
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ofono_gprs_context_set_ipv4_address(gc, local, TRUE);
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ofono_gprs_context_set_ipv4_netmask(gc, STATIC_IP_NETMASK);
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ofono_gprs_context_set_ipv4_dns_servers(gc, dns);
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CALLBACK_WITH_SUCCESS(gcd->cb, gcd->cb_data);
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}
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static void ppp_disconnect(GAtPPPDisconnectReason reason, gpointer user_data)
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{
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struct ofono_gprs_context *gc = user_data;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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DBG("Reason: %d", reason);
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g_at_ppp_unref(gcd->ppp);
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gcd->ppp = NULL;
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switch (gcd->state) {
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case STATE_ENABLING:
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CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
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break;
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case STATE_DISABLING:
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CALLBACK_WITH_SUCCESS(gcd->cb, gcd->cb_data);
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break;
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default:
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ofono_gprs_context_deactivated(gc, gcd->active_context);
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break;
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}
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gcd->active_context = 0;
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gcd->state = STATE_IDLE;
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/*
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* If the channel of gcd->chat is NULL, it might cause
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* gprs_context_remove get called and the gprs context will be
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* removed.
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*/
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g_at_chat_resume(gcd->chat);
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}
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static gboolean setup_ppp(struct ofono_gprs_context *gc)
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{
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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GAtIO *io;
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DBG("");
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io = g_at_chat_get_io(gcd->chat);
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g_at_chat_suspend(gcd->chat);
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/* open ppp */
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gcd->ppp = g_at_ppp_new();
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if (gcd->ppp == NULL) {
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g_at_chat_resume(gcd->chat);
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return FALSE;
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}
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if (getenv("OFONO_PPP_DEBUG"))
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g_at_ppp_set_debug(gcd->ppp, ppp_debug, "PPP");
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g_at_ppp_set_auth_method(gcd->ppp, gcd->auth_method);
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if (gcd->auth_method != G_AT_PPP_AUTH_METHOD_NONE)
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g_at_ppp_set_credentials(gcd->ppp, gcd->username,
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gcd->password);
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/* set connect and disconnect callbacks */
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g_at_ppp_set_connect_function(gcd->ppp, ppp_connect, gc);
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g_at_ppp_set_disconnect_function(gcd->ppp, ppp_disconnect, gc);
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/* open the ppp connection */
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g_at_ppp_open(gcd->ppp, io);
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return TRUE;
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}
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static void at_cgdata_cb(gboolean ok, GAtResult *result, gpointer user_data)
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{
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struct ofono_gprs_context *gc = user_data;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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DBG("ok %d", ok);
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if (!ok) {
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struct ofono_error error;
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ofono_info("Unable to enter data state");
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gcd->active_context = 0;
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gcd->state = STATE_IDLE;
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decode_at_error(&error, g_at_result_final_response(result));
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gcd->cb(&error, gcd->cb_data);
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return;
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}
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setup_ppp(gc);
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}
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static void at_cgdcont_cb(gboolean ok, GAtResult *result, gpointer user_data)
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{
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struct ofono_gprs_context *gc = user_data;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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char buf[64];
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DBG("ok %d", ok);
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if (!ok) {
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struct ofono_error error;
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gcd->active_context = 0;
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gcd->state = STATE_IDLE;
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decode_at_error(&error, g_at_result_final_response(result));
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gcd->cb(&error, gcd->cb_data);
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return;
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}
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if (gcd->use_atd99)
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sprintf(buf, "ATD*99***%u#", gcd->active_context);
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else
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sprintf(buf, "AT+CGDATA=\"PPP\",%u", gcd->active_context);
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if (g_at_chat_send(gcd->chat, buf, none_prefix,
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at_cgdata_cb, gc, NULL) > 0)
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return;
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gcd->active_context = 0;
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gcd->state = STATE_IDLE;
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CALLBACK_WITH_FAILURE(gcd->cb, gcd->cb_data);
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}
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static void at_gprs_activate_primary(struct ofono_gprs_context *gc,
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const struct ofono_gprs_primary_context *ctx,
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ofono_gprs_context_cb_t cb, void *data)
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{
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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char buf[OFONO_GPRS_MAX_APN_LENGTH + 128];
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int len;
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/* IPv6 support not implemented */
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if (ctx->proto != OFONO_GPRS_PROTO_IP)
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goto error;
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DBG("cid %u", ctx->cid);
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gcd->active_context = ctx->cid;
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gcd->cb = cb;
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gcd->cb_data = data;
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memcpy(gcd->username, ctx->username, sizeof(ctx->username));
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memcpy(gcd->password, ctx->password, sizeof(ctx->password));
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/* We support CHAP, PAP and NONE */
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switch (ctx->auth_method) {
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case OFONO_GPRS_AUTH_METHOD_CHAP:
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gcd->auth_method = G_AT_PPP_AUTH_METHOD_CHAP;
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break;
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case OFONO_GPRS_AUTH_METHOD_PAP:
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gcd->auth_method = G_AT_PPP_AUTH_METHOD_PAP;
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break;
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case OFONO_GPRS_AUTH_METHOD_NONE:
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gcd->auth_method = G_AT_PPP_AUTH_METHOD_NONE;
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memset(gcd->username, 0, sizeof(gcd->username));
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memset(gcd->password, 0, sizeof(gcd->password));
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break;
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}
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gcd->state = STATE_ENABLING;
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if (gcd->vendor == OFONO_VENDOR_ZTE) {
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GAtChat *chat = g_at_chat_get_slave(gcd->chat);
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/*
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* The modem port of ZTE devices with certain firmware
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* versions ends up getting suspended. It will no longer
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* signal POLLOUT and becomes pretty unresponsive.
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*
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* To wake up the modem port, the only reliable method
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* found so far is AT+ZOPRT power mode command. It is
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* enough to ask for the current mode and the modem
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* port wakes up and accepts commands again.
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*
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* And since the modem port is suspended, this command
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* needs to be send on the control port of course.
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*
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*/
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g_at_chat_send(chat, "AT+ZOPRT?", none_prefix,
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NULL, NULL, NULL);
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}
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len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IP\"", ctx->cid);
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switch (gcd->vendor) {
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case OFONO_VENDOR_UBLOX:
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/*
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* U-blox modems require a magic prefix to the APN to
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* specify the authentication method to use in the
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* network. See UBX-13002752 - R21.
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*
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* As the response of the read command omits this magic
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* prefix, this is the least invasive place to set it.
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*/
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switch (ctx->auth_method) {
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case OFONO_GPRS_AUTH_METHOD_CHAP:
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snprintf(buf + len, sizeof(buf) - len - 3,
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",\"CHAP:%s\"", ctx->apn);
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break;
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case OFONO_GPRS_AUTH_METHOD_PAP:
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snprintf(buf + len, sizeof(buf) - len - 3,
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",\"PAP:%s\"", ctx->apn);
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break;
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case OFONO_GPRS_AUTH_METHOD_NONE:
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snprintf(buf + len, sizeof(buf) - len - 3,
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",\"%s\"", ctx->apn);
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break;
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}
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break;
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default:
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snprintf(buf + len, sizeof(buf) - len - 3, ",\"%s\"",
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ctx->apn);
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break;
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}
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if (g_at_chat_send(gcd->chat, buf, none_prefix,
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at_cgdcont_cb, gc, NULL) > 0)
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return;
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error:
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CALLBACK_WITH_FAILURE(cb, data);
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}
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static void at_gprs_deactivate_primary(struct ofono_gprs_context *gc,
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unsigned int cid,
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ofono_gprs_context_cb_t cb, void *data)
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{
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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DBG("cid %u", cid);
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gcd->state = STATE_DISABLING;
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gcd->cb = cb;
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gcd->cb_data = data;
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g_at_ppp_shutdown(gcd->ppp);
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}
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static void at_gprs_detach_shutdown(struct ofono_gprs_context *gc,
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unsigned int cid)
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{
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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DBG("cid %u", cid);
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g_at_ppp_shutdown(gcd->ppp);
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}
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static void cgev_notify(GAtResult *result, gpointer user_data)
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{
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struct ofono_gprs_context *gc = user_data;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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const char *event;
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int cid;
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GAtResultIter iter;
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g_at_result_iter_init(&iter, result);
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if (!g_at_result_iter_next(&iter, "+CGEV:"))
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return;
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if (!g_at_result_iter_next_unquoted_string(&iter, &event))
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return;
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if (g_str_has_prefix(event, "NW DEACT") == FALSE)
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return;
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if (!g_at_result_iter_skip_next(&iter))
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return;
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if (!g_at_result_iter_next_number(&iter, &cid))
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return;
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DBG("cid %d", cid);
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if ((unsigned int) cid != gcd->active_context)
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return;
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if (gcd->state != STATE_IDLE && gcd->ppp)
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g_at_ppp_shutdown(gcd->ppp);
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}
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static void at_cgdata_test_cb(gboolean ok, GAtResult *result,
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gpointer user_data)
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{
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struct ofono_gprs_context *gc = user_data;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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GAtResultIter iter;
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const char *data_type;
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gboolean found = FALSE;
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gcd->use_atd99 = TRUE;
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if (!ok) {
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DBG("not ok");
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goto error;
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}
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g_at_result_iter_init(&iter, result);
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if (!g_at_result_iter_next(&iter, "+CGDATA:")) {
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DBG("no +CGDATA line");
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goto error;
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}
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if (!g_at_result_iter_open_list(&iter)) {
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DBG("no list found");
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goto error;
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}
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while (!found && g_at_result_iter_next_string(&iter, &data_type)) {
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if (g_str_equal(data_type, "PPP")) {
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found = TRUE;
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gcd->use_atd99 = FALSE;
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}
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}
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error:
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DBG("use_atd99:%d", gcd->use_atd99);
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}
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static int at_gprs_context_probe(struct ofono_gprs_context *gc,
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unsigned int vendor, void *data)
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{
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GAtChat *chat = data;
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struct gprs_context_data *gcd;
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struct stat st;
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DBG("");
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if (stat(TUN_DEV, &st) < 0) {
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ofono_error("Missing support for TUN/TAP devices");
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return -ENODEV;
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}
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gcd = g_try_new0(struct gprs_context_data, 1);
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if (gcd == NULL)
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return -ENOMEM;
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gcd->chat = g_at_chat_clone(chat);
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gcd->vendor = vendor;
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ofono_gprs_context_set_data(gc, gcd);
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chat = g_at_chat_get_slave(gcd->chat);
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if (chat == NULL)
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return 0;
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switch (vendor) {
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case OFONO_VENDOR_SIMCOM_SIM900:
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gcd->use_atd99 = FALSE;
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break;
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default:
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g_at_chat_send(chat, "AT+CGDATA=?", cgdata_prefix,
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at_cgdata_test_cb, gc, NULL);
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}
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g_at_chat_register(chat, "+CGEV:", cgev_notify, FALSE, gc, NULL);
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return 0;
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}
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static void at_gprs_context_remove(struct ofono_gprs_context *gc)
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{
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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GAtIO *io;
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DBG("");
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if (gcd->state != STATE_IDLE && gcd->ppp) {
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if ((gcd->vendor == OFONO_VENDOR_HUAWEI) && gcd->chat) {
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/* immediately send escape sequence */
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io = g_at_chat_get_io(gcd->chat);
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if (io)
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g_at_io_write(io, "+++", 3);
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}
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g_at_ppp_unref(gcd->ppp);
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g_at_chat_resume(gcd->chat);
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}
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ofono_gprs_context_set_data(gc, NULL);
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g_at_chat_unref(gcd->chat);
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g_free(gcd);
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}
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static const struct ofono_gprs_context_driver driver = {
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.name = "atmodem",
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.probe = at_gprs_context_probe,
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.remove = at_gprs_context_remove,
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.activate_primary = at_gprs_activate_primary,
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.deactivate_primary = at_gprs_deactivate_primary,
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.detach_shutdown = at_gprs_detach_shutdown,
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};
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void at_gprs_context_init(void)
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{
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ofono_gprs_context_driver_register(&driver);
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}
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void at_gprs_context_exit(void)
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{
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ofono_gprs_context_driver_unregister(&driver);
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}
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