mirror of git://git.sysmocom.de/ofono
610 lines
14 KiB
C
610 lines
14 KiB
C
/*
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*
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* oFono - Open Source Telephony
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*
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* Copyright (C) 2008-2010 Intel Corporation. All rights reserved.
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* Copyright (C) 2010 ST-Ericsson AB.
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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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#define _GNU_SOURCE
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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 <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 <ofono/gprs.h>
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#include <linux/types.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <arpa/inet.h>
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#include "gatchat.h"
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#include "gatresult.h"
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#include "stemodem.h"
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#include "caif_socket.h"
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#include "if_caif.h"
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#include "caif_rtnl.h"
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#define MAX_CAIF_DEVICES 4
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#define MAX_DNS 2
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#define IP_ADDR_LEN 20
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#define AUTH_BUF_LENGTH (OFONO_GPRS_MAX_USERNAME_LENGTH + \
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OFONO_GPRS_MAX_PASSWORD_LENGTH + 128)
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static const char *cgact_prefix[] = { "+CGACT:", NULL };
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static const char *none_prefix[] = { NULL };
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static GSList *g_caif_devices;
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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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};
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struct conn_info {
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/*
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* cid is allocated in oFono Core and is identifying
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* the Account. cid = 0 indicates that it is currently unused.
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*/
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unsigned int cid;
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/* Id used by CAIF and EPPSD to identify the CAIF channel*/
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unsigned int channel_id;
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/* Linux Interface Id */
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unsigned int ifindex;
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/* Linux Interface name */
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char interface[IF_NAMESIZE];
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gboolean created;
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};
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struct eppsd_response {
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char *current;
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char ip_address[IP_ADDR_LEN];
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char subnet_mask[IP_ADDR_LEN];
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char mtu[IP_ADDR_LEN];
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char dns_server1[IP_ADDR_LEN];
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char dns_server2[IP_ADDR_LEN];
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char p_cscf_server[IP_ADDR_LEN];
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};
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static void start_element_handler(GMarkupParseContext *context,
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const gchar *element_name, const gchar **attribute_names,
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const gchar **attribute_values, gpointer user_data,
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GError **error)
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{
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struct eppsd_response *rsp = user_data;
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rsp->current = NULL;
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if (!strcmp(element_name, "ip_address"))
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rsp->current = rsp->ip_address;
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else if (!strcmp(element_name, "subnet_mask"))
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rsp->current = rsp->subnet_mask;
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else if (!strcmp(element_name, "mtu"))
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rsp->current = rsp->mtu;
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else if (!strcmp(element_name, "dns_server") &&
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rsp->dns_server1[0] == '\0')
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rsp->current = rsp->dns_server1;
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else if (!strcmp(element_name, "dns_server"))
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rsp->current = rsp->dns_server2;
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else if (!strcmp(element_name, "p_cscf_server"))
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rsp->current = rsp->p_cscf_server;
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}
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static void end_element_handler(GMarkupParseContext *context,
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const gchar *element_name, gpointer user_data,
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GError **error)
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{
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struct eppsd_response *rsp = user_data;
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rsp->current = NULL;
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}
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static void text_handler(GMarkupParseContext *context,
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const gchar *text, gsize text_len,
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gpointer user_data, GError **error)
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{
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struct eppsd_response *rsp = user_data;
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if (rsp->current) {
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strncpy(rsp->current, text, IP_ADDR_LEN);
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rsp->current[IP_ADDR_LEN] = '\0';
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}
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}
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static void error_handler(GMarkupParseContext *context,
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GError *error, gpointer user_data)
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{
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DBG("Error parsing xml response from eppsd: %s",
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error->message);
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}
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static GMarkupParser parser = {
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start_element_handler,
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end_element_handler,
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text_handler,
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NULL,
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error_handler
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};
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static gint conn_compare_by_cid(gconstpointer a, gconstpointer b)
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{
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const struct conn_info *conn = a;
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unsigned int used = GPOINTER_TO_UINT(b);
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if (used != conn->cid)
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return 1;
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return 0;
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}
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static struct conn_info *conn_info_create(unsigned int channel_id)
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{
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struct conn_info *connection = g_try_new0(struct conn_info, 1);
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if (connection == NULL)
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return NULL;
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connection->cid = 0;
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connection->channel_id = channel_id;
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return connection;
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}
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static void rtnl_callback(int ifindex, const char *ifname, void *user_data)
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{
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struct conn_info *conn = user_data;
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if (ifindex < 0) {
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conn->created = FALSE;
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ofono_error("Failed to create caif interface %s",
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conn->interface);
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return;
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}
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strncpy(conn->interface, ifname, sizeof(conn->interface));
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conn->ifindex = ifindex;
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conn->created = TRUE;
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}
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/*
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* Removes IP interface for CAIF.
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*/
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static void caif_if_remove(struct conn_info *conn)
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{
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if (!conn->created)
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return;
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if (caif_rtnl_delete_interface(conn->ifindex) < 0) {
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ofono_error("Failed to delete caif interface %s",
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conn->interface);
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return;
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}
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DBG("removed CAIF interface ch:%d ifname:%s ifindex:%d\n",
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conn->channel_id, conn->interface, conn->ifindex);
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}
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static void ste_eppsd_down_cb(gboolean ok, GAtResult *result,
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gpointer user_data)
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{
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struct cb_data *cbd = user_data;
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ofono_gprs_context_cb_t cb = cbd->cb;
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struct ofono_gprs_context *gc = cbd->user;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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struct conn_info *conn;
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GSList *l;
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if (!ok) {
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struct ofono_error error;
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decode_at_error(&error, g_at_result_final_response(result));
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cb(&error, cbd->data);
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return;
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}
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l = g_slist_find_custom(g_caif_devices,
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GUINT_TO_POINTER(gcd->active_context),
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conn_compare_by_cid);
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if (l == NULL) {
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DBG("Did not find data (used caif device) for"
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"connection with cid; %d",
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gcd->active_context);
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CALLBACK_WITH_FAILURE(cb, cbd->data);
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return;
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}
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conn = l->data;
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conn->cid = 0;
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CALLBACK_WITH_SUCCESS(cb, cbd->data);
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}
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static void ste_eppsd_up_cb(gboolean ok, GAtResult *result, gpointer user_data)
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{
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struct cb_data *cbd = user_data;
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ofono_gprs_context_up_cb_t cb = cbd->cb;
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struct ofono_gprs_context *gc = cbd->user;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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struct conn_info *conn;
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GAtResultIter iter;
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GSList *l;
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int i;
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gsize length;
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const char *res_string;
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const char *dns[MAX_DNS + 1];
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struct eppsd_response rsp;
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GMarkupParseContext *context;
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l = g_slist_find_custom(g_caif_devices,
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GUINT_TO_POINTER(gcd->active_context),
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conn_compare_by_cid);
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if (l == NULL) {
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DBG("CAIF Device gone missing (cid:%d)", gcd->active_context);
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goto error_no_device;
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}
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conn = l->data;
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if (!ok) {
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struct ofono_error error;
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conn->cid = 0;
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gcd->active_context = 0;
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decode_at_error(&error, g_at_result_final_response(result));
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cb(&error, NULL, 0, NULL, NULL, NULL, NULL, cbd->data);
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return;
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}
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rsp.current = NULL;
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context = g_markup_parse_context_new(&parser, 0, &rsp, NULL);
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memset(&rsp, 0, sizeof(rsp));
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g_at_result_iter_init(&iter, result);
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for (i = 0; i < g_at_result_num_response_lines(result); i++) {
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g_at_result_iter_next(&iter, NULL);
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res_string = g_at_result_iter_raw_line(&iter);
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length = strlen(res_string);
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if (!g_markup_parse_context_parse(context, res_string,
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length, NULL))
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goto error;
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}
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if (!g_markup_parse_context_end_parse(context, NULL))
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goto error;
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g_markup_parse_context_free(context);
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dns[0] = rsp.dns_server1;
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dns[1] = rsp.dns_server2;
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dns[2] = NULL;
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CALLBACK_WITH_SUCCESS(cb, conn->interface, TRUE, rsp.ip_address,
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rsp.subnet_mask, NULL,
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dns, cbd->data);
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return;
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error:
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if (context)
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g_markup_parse_context_free(context);
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if (conn)
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conn->cid = 0;
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error_no_device:
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DBG("ste_eppsd_up_cb error");
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gcd->active_context = 0;
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CALLBACK_WITH_FAILURE(cb, NULL, 0, NULL, NULL, NULL, NULL, cbd->data);
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}
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static void ste_cgdcont_cb(gboolean ok, GAtResult *result, gpointer user_data)
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{
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struct cb_data *cbd = user_data;
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ofono_gprs_context_up_cb_t cb = cbd->cb;
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struct ofono_gprs_context *gc = cbd->user;
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struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
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struct cb_data *ncbd;
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char buf[128];
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struct conn_info *conn;
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GSList *l;
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l = g_slist_find_custom(g_caif_devices,
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GUINT_TO_POINTER(gcd->active_context),
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conn_compare_by_cid);
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if (!l) {
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DBG("CAIF Device gone missing (cid:%d)", gcd->active_context);
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goto error_no_device;
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}
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conn = l->data;
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if (!ok) {
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struct ofono_error error;
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conn->cid = 0;
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gcd->active_context = 0;
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decode_at_error(&error, g_at_result_final_response(result));
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cb(&error, NULL, 0, NULL, NULL, NULL, NULL, cbd->data);
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return;
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}
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snprintf(buf, sizeof(buf), "AT*EPPSD=1,%u,%u",
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conn->channel_id, conn->cid);
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ncbd = g_memdup(cbd, sizeof(struct cb_data));
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if (g_at_chat_send(gcd->chat, buf, NULL,
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ste_eppsd_up_cb, ncbd, g_free) > 0)
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return;
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g_free(ncbd);
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conn->cid = 0;
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error_no_device:
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gcd->active_context = 0;
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CALLBACK_WITH_FAILURE(cb, NULL, 0, NULL, NULL,
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NULL, NULL, cbd->data);
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}
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static void ste_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_up_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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struct cb_data *cbd = cb_data_new(cb, data);
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char buf[AUTH_BUF_LENGTH];
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int len;
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GSList *l;
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struct conn_info *conn;
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if (cbd == NULL)
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goto error_no_device;
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gcd->active_context = ctx->cid;
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cbd->user = gc;
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/* Find free connection with cid zero */
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l = g_slist_find_custom(g_caif_devices, GUINT_TO_POINTER(0),
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conn_compare_by_cid);
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if (!l) {
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DBG("No more available CAIF devices");
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goto error_no_device;
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}
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conn = l->data;
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conn->cid = ctx->cid;
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if (!conn->created) {
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DBG("CAIF interface not created (rtnl error?)");
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goto error;
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}
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len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IP\"", ctx->cid);
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if (ctx->apn)
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snprintf(buf + len, sizeof(buf) - len - 3, ",\"%s\"",
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ctx->apn);
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if (g_at_chat_send(gcd->chat, buf, none_prefix,
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ste_cgdcont_cb, cbd, g_free) == 0)
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goto error;
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/*
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* Set username and password, this should be done after CGDCONT
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* or an error can occur. We don't bother with error checking
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* here
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*/
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snprintf(buf, sizeof(buf), "AT*EIAAUW=%d,1,\"%s\",\"%s\"",
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ctx->cid, ctx->username, ctx->password);
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g_at_chat_send(gcd->chat, buf, none_prefix, NULL, NULL, NULL);
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return;
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error:
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conn->cid = 0;
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error_no_device:
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gcd->active_context = 0;
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g_free(cbd);
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CALLBACK_WITH_FAILURE(cb, NULL, 0, NULL, NULL, NULL, NULL, data);
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}
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static void ste_gprs_deactivate_primary(struct ofono_gprs_context *gc,
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unsigned int id,
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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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struct cb_data *cbd = cb_data_new(cb, data);
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struct conn_info *conn;
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char buf[64];
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GSList *l;
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if (cbd == NULL)
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goto error;
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gcd->active_context = id;
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cbd->user = gc;
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l = g_slist_find_custom(g_caif_devices, GUINT_TO_POINTER(id),
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conn_compare_by_cid);
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if (l == NULL) {
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DBG("did not find data (channel id) "
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"for connection with cid; %d", id);
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goto error;
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}
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conn = l->data;
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snprintf(buf, sizeof(buf), "AT*EPPSD=0,%u,%u", conn->channel_id, id);
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if (g_at_chat_send(gcd->chat, buf, none_prefix,
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ste_eppsd_down_cb, cbd, g_free) > 0)
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return;
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error:
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g_free(cbd);
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CALLBACK_WITH_FAILURE(cb, data);
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}
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static void ste_cgact_read_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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gint cid, state;
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GAtResultIter iter;
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GSList *l;
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if (!ok)
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return;
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g_at_result_iter_init(&iter, result);
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while (g_at_result_iter_next(&iter, "+CGACT:")) {
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if (!g_at_result_iter_next_number(&iter, &cid))
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continue;
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if ((unsigned int) cid != gcd->active_context)
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continue;
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if (!g_at_result_iter_next_number(&iter, &state))
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continue;
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if (state == 1)
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continue;
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ofono_gprs_context_deactivated(gc, gcd->active_context);
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gcd->active_context = 0;
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/* Mark interface as unused */
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l = g_slist_find_custom(g_caif_devices, GUINT_TO_POINTER(cid),
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conn_compare_by_cid);
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if (l != NULL) {
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struct conn_info *conn = l->data;
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conn->cid = 0;
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}
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}
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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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GAtResultIter iter;
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const char *event;
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g_at_result_iter_init(&iter, result);
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|
|
|
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 REACT ") ||
|
|
g_str_has_prefix(event, "NW DEACT ") ||
|
|
g_str_has_prefix(event, "ME DEACT ")) {
|
|
/* Ask what primary contexts are active now */
|
|
g_at_chat_send(gcd->chat, "AT+CGACT?", cgact_prefix,
|
|
ste_cgact_read_cb, gc, NULL);
|
|
}
|
|
}
|
|
|
|
static int ste_gprs_context_probe(struct ofono_gprs_context *gc,
|
|
unsigned int vendor, void *data)
|
|
{
|
|
GAtChat *chat = data;
|
|
struct gprs_context_data *gcd;
|
|
struct conn_info *ci;
|
|
int i, err;
|
|
|
|
gcd = g_new0(struct gprs_context_data, 1);
|
|
gcd->chat = g_at_chat_clone(chat);
|
|
|
|
g_at_chat_register(gcd->chat, "+CGEV:", cgev_notify, FALSE, gc, NULL);
|
|
|
|
ofono_gprs_context_set_data(gc, gcd);
|
|
|
|
for (i = 0; i < MAX_CAIF_DEVICES; i++) {
|
|
ci = conn_info_create(i+1);
|
|
if (!ci)
|
|
return -ENOMEM;
|
|
err = caif_rtnl_create_interface(IFLA_CAIF_IPV4_CONNID,
|
|
ci->channel_id, FALSE,
|
|
rtnl_callback, ci);
|
|
if (err < 0) {
|
|
DBG("Failed to create IP interface for CAIF");
|
|
return err;
|
|
}
|
|
|
|
g_caif_devices = g_slist_append(g_caif_devices, ci);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ste_gprs_context_remove(struct ofono_gprs_context *gc)
|
|
{
|
|
struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
|
|
|
|
g_slist_foreach(g_caif_devices, (GFunc) caif_if_remove, NULL);
|
|
g_slist_foreach(g_caif_devices, (GFunc) g_free, NULL);
|
|
g_slist_free(g_caif_devices);
|
|
g_caif_devices = NULL;
|
|
|
|
ofono_gprs_context_set_data(gc, NULL);
|
|
|
|
g_at_chat_unref(gcd->chat);
|
|
g_free(gcd);
|
|
}
|
|
|
|
static struct ofono_gprs_context_driver driver = {
|
|
.name = "stemodem",
|
|
.probe = ste_gprs_context_probe,
|
|
.remove = ste_gprs_context_remove,
|
|
.activate_primary = ste_gprs_activate_primary,
|
|
.deactivate_primary = ste_gprs_deactivate_primary,
|
|
};
|
|
|
|
void ste_gprs_context_init(void)
|
|
{
|
|
caif_rtnl_init();
|
|
ofono_gprs_context_driver_register(&driver);
|
|
}
|
|
|
|
void ste_gprs_context_exit(void)
|
|
{
|
|
ofono_gprs_context_driver_unregister(&driver);
|
|
caif_rtnl_exit();
|
|
}
|