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*
* AT chat library with GLib integration
*
* Copyright (C) 2008-2010 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/signalfd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <glib.h>
#include <gatchat.h>
#include <gattty.h>
#include <gatppp.h>
static const char *none_prefix[] = { NULL };
static const char *cfun_prefix[] = { "+CFUN:", NULL };
static const char *creg_prefix[] = { "+CREG:", NULL };
static const char *cgreg_prefix[] = { "+CGREG:", NULL };
static gchar *option_ip = NULL;
static gint option_port = 0;
static gchar *option_modem = NULL;
static gchar *option_control = NULL;
static gint option_cid = 0;
static gchar *option_apn = NULL;
static gint option_offmode = 0;
static gboolean option_legacy = FALSE;
static gchar *option_username = NULL;
static gchar *option_password = NULL;
static gchar *option_pppdump = NULL;
static GAtPPP *ppp;
static GAtChat *control;
static GAtChat *modem;
static GMainLoop *event_loop;
enum state {
STATE_NONE = 0,
STATE_REGISTERING,
STATE_ATTACHING,
STATE_ACTIVATING
};
static int state = 0;
static int oldmode = 0;
static void gsmdial_debug(const char *str, void *data)
{
g_print("%s: %s\n", (const char *) data, str);
}
static gboolean quit_eventloop(gpointer user_data)
{
g_main_loop_quit(event_loop);
return FALSE;
}
static void power_down(gboolean ok, GAtResult *result, gpointer user_data)
{
g_main_loop_quit(event_loop);
}
static gboolean signal_cb(GIOChannel *channel, GIOCondition cond, gpointer data)
{
static int terminated = 0;
int signal_fd = GPOINTER_TO_INT(data);
struct signalfd_siginfo si;
ssize_t res;
if (cond & (G_IO_NVAL | G_IO_ERR))
return FALSE;
res = read(signal_fd, &si, sizeof(si));
if (res != sizeof(si))
return FALSE;
switch (si.ssi_signo) {
case SIGINT:
case SIGTERM:
if (terminated == 0) {
g_timeout_add_seconds(10, quit_eventloop, NULL);
if (ppp == NULL) {
char buf[64];
sprintf(buf, "AT+CFUN=%u", option_offmode);
g_at_chat_send(control, buf, none_prefix,
power_down, NULL, NULL);
} else
g_at_ppp_shutdown(ppp);
}
terminated++;
break;
default:
break;
}
return TRUE;
}
static gboolean at_util_parse_reg_unsolicited(GAtResult *result,
const char *prefix, int *status,
int *lac, int *ci, int *tech)
{
GAtResultIter iter;
int s;
int l = -1, c = -1, t = -1;
const char *str;
g_at_result_iter_init(&iter, result);
if (g_at_result_iter_next(&iter, prefix) == FALSE)
return FALSE;
if (g_at_result_iter_next_number(&iter, &s) == FALSE)
return FALSE;
if (g_at_result_iter_next_string(&iter, &str) == TRUE)
l = strtol(str, NULL, 16);
else
goto out;
if (g_at_result_iter_next_string(&iter, &str) == TRUE)
c = strtol(str, NULL, 16);
else
goto out;
g_at_result_iter_next_number(&iter, &t);
out:
if (status)
*status = s;
if (lac)
*lac = l;
if (ci)
*ci = c;
if (tech)
*tech = t;
return TRUE;
}
static gboolean at_util_parse_reg(GAtResult *result, const char *prefix,
int *mode, int *status,
int *lac, int *ci, int *tech)
{
GAtResultIter iter;
int m, s;
int l = -1, c = -1, t = -1;
const char *str;
g_at_result_iter_init(&iter, result);
while (g_at_result_iter_next(&iter, prefix)) {
g_at_result_iter_next_number(&iter, &m);
/* Sometimes we get an unsolicited CREG/CGREG here, skip it */
if (g_at_result_iter_next_number(&iter, &s) == FALSE)
continue;
if (g_at_result_iter_next_string(&iter, &str) == TRUE)
l = strtol(str, NULL, 16);
else
goto out;
if (g_at_result_iter_next_string(&iter, &str) == TRUE)
c = strtol(str, NULL, 16);
else
goto out;
g_at_result_iter_next_number(&iter, &t);
out:
if (mode)
*mode = m;
if (status)
*status = s;
if (lac)
*lac = l;
if (ci)
*ci = c;
if (tech)
*tech = t;
return TRUE;
}
return FALSE;
}
static void ppp_connect(const char *iface, const char *ip,
const char *dns1, const char *dns2,
gpointer user_data)
{
/* print out the negotiated address and dns server */
g_print("Network Device: %s\n", iface);
g_print("IP Address: %s\n", ip);
g_print("Primary DNS Server: %s\n", dns1);
g_print("Secondary DNS Server: %s\n", dns2);
}
static void ppp_disconnect(GAtPPPDisconnectReason reason, gpointer user_data)
{
char buf[64];
g_print("PPP Link down: %d\n", reason);
g_at_chat_resume(modem);
sprintf(buf, "AT+CFUN=%u", option_offmode);
g_at_chat_send(control, buf, none_prefix, power_down, NULL, NULL);
}
static void connect_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
GAtIO *io;
if (!ok) {
g_print("Unable to define context\n");
exit(1);
}
/* get the data IO channel */
io = g_at_chat_get_io(modem);
/*
* shutdown gatchat or else it tries to take all the input
* from the modem and does not let PPP get it.
*/
g_at_chat_suspend(modem);
/* open ppp */
ppp = g_at_ppp_new_from_io(io);
if (!ppp) {
g_print("Unable to create PPP object\n");
exit(1);
}
g_at_ppp_set_debug(ppp, gsmdial_debug, "PPP");
if (option_pppdump)
g_at_ppp_set_recording(ppp, option_pppdump);
g_at_ppp_set_credentials(ppp, option_username, option_password);
/* set connect and disconnect callbacks */
g_at_ppp_set_connect_function(ppp, ppp_connect, NULL);
g_at_ppp_set_disconnect_function(ppp, ppp_disconnect, NULL);
/* open the ppp connection */
g_at_ppp_open(ppp);
}
static void at_cgdcont_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
char buf[64];
if (!ok) {
g_print("Unable to define context\n");
exit(1);
}
if (option_legacy == TRUE)
sprintf(buf, "ATD*99***%u#", option_cid);
else
sprintf(buf, "AT+CGDATA=\"PPP\",%u", option_cid);
g_at_chat_send(modem, buf, none_prefix, connect_cb, NULL, NULL);
}
static void setup_context(int status)
{
char buf[1024];
int len;
state = STATE_ACTIVATING;
g_print("Registered to GPRS network, roaming=%s\n",
status == 5 ? "true" : "false");
len = sprintf(buf, "AT+CGDCONT=%u,\"IP\"", option_cid);
snprintf(buf + len, sizeof(buf) - len - 3, ",\"%s\"", option_apn);
g_at_chat_send(control, buf, none_prefix, at_cgdcont_cb, NULL, NULL);
}
static void cgreg_notify(GAtResult *result, gpointer user_data)
{
int status, lac, ci, tech;
if (state != STATE_ATTACHING)
return;
if (at_util_parse_reg_unsolicited(result, "+CGREG:", &status,
&lac, &ci, &tech) == FALSE)
return;
if (status != 1 && status != 5)
return;
setup_context(status);
}
static void cgreg_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
int status, lac, ci, tech;
if (!ok)
return;
if (at_util_parse_reg(result, "+CGREG:", NULL, &status,
&lac, &ci, &tech) == FALSE)
return;
if (status != 1 && status != 5) {
g_at_chat_register(control, "+CGREG:",
cgreg_notify, FALSE, NULL, NULL);
return;
}
setup_context(status);
}
static void attached_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
if (!ok)
return;
g_at_chat_send(control, "AT+CGREG?", cgreg_prefix,
cgreg_cb, NULL, NULL);
}
static void activate_gprs(int status)
{
state = STATE_ATTACHING;
g_print("Registered to network, roaming=%s\n",
status == 5 ? "true" : "false");
g_print("Activating GPRS network...\n");
g_at_chat_send(control, "AT+CGATT=1", none_prefix,
attached_cb, NULL, NULL);
}
static void creg_notify(GAtResult *result, gpointer user_data)
{
int status, lac, ci, tech;
if (state != STATE_REGISTERING)
return;
if (at_util_parse_reg_unsolicited(result, "+CREG:", &status,
&lac, &ci, &tech) == FALSE)
return;
if (status != 1 && status != 5)
return;
activate_gprs(status);
}
static void creg_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
int status, lac, ci, tech;
if (!ok)
return;
if (at_util_parse_reg(result, "+CREG:", NULL, &status,
&lac, &ci, &tech) == FALSE)
return;
if (status != 1 && status != 5) {
g_at_chat_register(control, "+CREG:",
creg_notify, FALSE, NULL, NULL);
return;
}
activate_gprs(status);
}
static void register_cb(gboolean ok, GAtResult *result, gpointer user_data)
{
if (!ok) {
g_print("Couldn't register to network, exiting...\n");
exit(1);
}
state = STATE_REGISTERING;
g_print("Waiting for network registration...\n");
g_at_chat_send(control, "AT+CREG?", creg_prefix,
creg_cb, NULL, NULL);
}
static void start_dial(gboolean ok, GAtResult *result, gpointer user_data)
{
if (!ok) {
g_print("Checking PIN status failed\n");
exit(1);
}
g_at_chat_send(control, "AT+CREG=2", none_prefix, NULL, NULL, NULL);
g_at_chat_send(control, "AT+CGREG=2", none_prefix, NULL, NULL, NULL);
g_at_chat_send(control, "AT+COPS=0", none_prefix,
register_cb, NULL, NULL);
}
static void check_pin(gboolean ok, GAtResult *result, gpointer user_data)
{
if (!ok) {
g_print("Turning on the modem failed\n");
exit(1);
}
g_at_chat_send(control, "AT+CPIN?", NULL, start_dial, NULL, NULL);
}
static void check_mode(gboolean ok, GAtResult *result, gpointer user_data)
{
GAtResultIter iter;
if (!ok) {
g_print("Checking modem mode failed\n");
exit(1);
}
g_at_result_iter_init(&iter, result);
g_at_result_iter_next(&iter, "+CFUN:");
g_at_result_iter_next_number(&iter, &oldmode);
g_print("Current modem mode is %d\n", oldmode);
if (oldmode == 1) {
check_pin(ok, result, user_data);
return;
}
g_at_chat_send(control, "AT+CFUN=1", NULL, check_pin, NULL, NULL);
}
static int open_serial()
{
GAtSyntax *syntax;
GIOChannel *channel;
channel = g_at_tty_open(option_control, NULL);
if (channel == NULL)
return -EIO;
syntax = g_at_syntax_new_gsm_permissive();
control = g_at_chat_new(channel, syntax);
g_io_channel_unref(channel);
g_at_syntax_unref(syntax);
if (control == NULL)
return -EIO;
if (option_modem == NULL) {
g_at_chat_ref(control);
modem = control;
g_at_chat_set_debug(control, gsmdial_debug, "");
} else {
g_at_chat_set_debug(control, gsmdial_debug, "Control");
channel = g_at_tty_open(option_modem, NULL);
if (channel == NULL)
return -EIO;
syntax = g_at_syntax_new_gsm_permissive();
modem = g_at_chat_new(channel, syntax);
g_io_channel_unref(channel);
g_at_syntax_unref(syntax);
if (modem == NULL)
return -EIO;
g_at_chat_set_debug(modem, gsmdial_debug, "Modem");
}
return 0;
}
static int open_ip()
{
int sk, err;
struct sockaddr_in addr;
GAtSyntax *syntax;
GIOChannel *channel;
sk = socket(PF_INET, SOCK_STREAM, 0);
if (sk < 0)
return -EINVAL;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(option_ip);
addr.sin_port = htons(option_port);
err = connect(sk, (struct sockaddr *) &addr, sizeof(addr));
if (err < 0) {
close(sk);
return err;
}
channel = g_io_channel_unix_new(sk);
if (channel == NULL) {
close(sk);
return -ENOMEM;
}
syntax = g_at_syntax_new_gsmv1();
control = g_at_chat_new(channel, syntax);
g_io_channel_unref(channel);
g_at_syntax_unref(syntax);
if (control == NULL)
return -ENOMEM;
g_at_chat_ref(control);
modem = control;
g_at_chat_set_debug(control, gsmdial_debug, "");
return 0;
}
static GOptionEntry options[] = {
{ "ip", 'i', 0, G_OPTION_ARG_STRING, &option_ip,
"Specify IP" },
{ "port", 'p', 0, G_OPTION_ARG_INT, &option_port,
"Specify IP Port" },
{ "control", 'n', 0, G_OPTION_ARG_FILENAME, &option_control,
"Specify Modem Control port" },
{ "modem", 'm', 0, G_OPTION_ARG_FILENAME, &option_modem,
"Specify Modem port (ppp), if not provided"
" the control port will be used" },
{ "cid", 'c', 0, G_OPTION_ARG_INT, &option_cid,
"Specify CID to use" },
{ "apn", 'a', 0, G_OPTION_ARG_STRING, &option_apn,
"Specify APN" },
{ "offmode", 'o', 0, G_OPTION_ARG_INT, &option_offmode,
"Specify CFUN offmode" },
{ "legacy", 'l', 0, G_OPTION_ARG_NONE, &option_legacy,
"Use ATD*99***<cid>#" },
{ "username", 'u', 0, G_OPTION_ARG_STRING, &option_username,
"Specify PPP username" },
{ "password", 'w', 0, G_OPTION_ARG_STRING, &option_password,
"Specify PPP password" },
{ "pppdump", 'D', 0, G_OPTION_ARG_STRING, &option_pppdump,
"Specify pppdump filename" },
{ NULL },
};
int main(int argc, char **argv)
{
GOptionContext *context;
GError *err = NULL;
sigset_t mask;
int signal_fd;
GIOChannel *signal_io;
int signal_source;
context = g_option_context_new(NULL);
g_option_context_add_main_entries(context, options, NULL);
if (g_option_context_parse(context, &argc, &argv, &err) == FALSE) {
if (err != NULL) {
g_printerr("%s\n", err->message);
g_error_free(err);
return 1;
}
g_printerr("An unknown error occurred\n");
return 1;
}
g_option_context_free(context);
if (option_control) {
int ret;
g_print("Control: %s\n", option_control);
if (option_modem)
g_print("Modem: %s\n", option_modem);
ret = open_serial();
g_free(option_control);
g_free(option_modem);
if (ret < 0)
goto out;
} else {
int ret;
g_print("IP: %s\n", option_ip);
g_print("Port: %d\n", option_port);
ret = open_ip();
g_free(option_ip);
if (ret < 0)
goto out;
}
g_print("APN: %s\n", option_apn);
g_print("CID: %d\n", option_cid);
sigemptyset(&mask);
sigaddset(&mask, SIGTERM);
sigaddset(&mask, SIGINT);
sigaddset(&mask, SIGUSR2);
sigaddset(&mask, SIGPIPE);
if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
perror("Can't set signal mask");
return 1;
}
signal_fd = signalfd(-1, &mask, 0);
if (signal_fd < 0) {
perror("Can't create signal filedescriptor");
return 1;
}
signal_io = g_io_channel_unix_new(signal_fd);
g_io_channel_set_close_on_unref(signal_io, TRUE);
signal_source = g_io_add_watch(signal_io,
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
signal_cb, GINT_TO_POINTER(signal_fd));
g_io_channel_unref(signal_io);
event_loop = g_main_loop_new(NULL, FALSE);
g_at_chat_send(control, "ATE0Q0V1", NULL, NULL, NULL, NULL);
g_at_chat_send(control, "AT+CFUN?", cfun_prefix,
check_mode, NULL, NULL);
g_main_loop_run(event_loop);
g_source_remove(signal_source);
g_main_loop_unref(event_loop);
out:
if (ppp == NULL) {
g_at_chat_unref(control);
g_at_chat_unref(modem);
} else
g_at_ppp_unref(ppp);
g_free(option_apn);
return 0;
}
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