void get_current_network(int *device, char *name, int *channel)
{
int sfd;
struct sockaddr_in saddr;
socklen_t len;
int active_device = get_current_network_device();
/* if (vrms_nw == 0) {
sfd = socket(AF_INET, SOCK_DGRAM, 0);
bzero(&saddr, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
saddr.sin_port = htons(5678);
len = sizeof(saddr);
sendto(sfd, &active_device, sizeof(active_device), 0,
(struct sockaddr *)&saddr, len);
vrms_nw = 1;
}
*/
if (active_device == WIFI) {
*device = WIFI;
get_essid(name, channel);
} else if (active_device == GSM) {
*device = GSM;
strcpy(name, gsm_conn_name);
}
}
static void wireless_essid(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_ESSID, get_essid(dev, KEY_ESSID));
}
static const char *
help_iw(void)
{
static xsg_string_t *string = NULL;
xsg_list_t *l;
int i = 0;
init_iw();
if (skfd < 0) {
return NULL;
}
if (string == NULL) {
string = xsg_string_new(NULL);
} else {
xsg_string_truncate(string, 0);
}
get_iw_device_list();
for (l = device_list; l; l = l->next) {
char name[128];
snprintf(name, sizeof(name), "IW_INTERFACE%d", i++);
xsg_setenv(name, (char *) device_list->data, TRUE);
xsg_string_append_printf(string, "%s: %s\n", name,
(char *) device_list->data);
}
xsg_string_append(string, "\n");
for (l = device_list; l; l = l->next) {
char *ifname = (char *) l->data;
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "config:name",
get_name(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "config:nwid",
get_nwid(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "config:freq",
get_freq_number(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "config:freq",
get_freq_string(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "config:channel",
get_channel(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "config:key",
get_key(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "config:keyid",
get_keyid(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "config:essid",
get_essid(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "config:mode",
get_mode_number(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "config:mode",
get_mode_string(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "info:sensitivity",
get_sens(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:nickname",
get_nickname(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:access_point",
get_ap(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "info:bitrate",
get_bitrate_number(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:bitrate",
get_bitrate_string(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "info:rts",
get_rts_number(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:rts",
get_rts_string(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "info:fragment",
get_frag_number(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:fragment",
get_frag_string(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:power_management",
get_power_management(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "info:txpower:dbm",
get_txpower_dbm(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.2f\n",
XSG_MODULE_NAME, ifname, "info:txpower:mw",
get_txpower_mw(ifname));
xsg_string_append_printf(string, "S %s:%s:%-36s%s\n",
XSG_MODULE_NAME, ifname, "info:retry",
get_retry(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:quality:quality",
get_stats_quality_quality(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:quality:signal",
get_stats_quality_signal(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:quality:noise",
get_stats_quality_noise(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:discarded:nwid",
get_stats_discarded_nwid(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:discarded:code",
get_stats_discarded_code(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:discarded:fragment",
get_stats_discarded_fragment(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:discarded:retries",
get_stats_discarded_retries(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:discarded:misc",
get_stats_discarded_misc(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "stats:missed:beacon",
get_stats_missed_beacon(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "range:sensitivity",
get_range_sensitivity(ifname));
xsg_string_append_printf(string, "N %s:%s:%-36s%.0f\n",
XSG_MODULE_NAME, ifname, "range:max_quality:quality",
get_range_max_quality_quality(ifname));
}
return string->str;
}
void vho_trigger()
{
float qdv_wifi, qdv_3g, qdv_diff;
int old_dev, new_dev;
char essid[50], apn_name[50];
char *apn = apn_name;
char network_name[50];
char* ip_interface;
int best_3g_conn;
memset(apn_name, '\0', sizeof (apn_name));
if (wifi_avail == 1) {
/* Get the QDV and essid of a network which is best in Wi-Fi */
printf("wifi avail = %d\n",wifi_avail);
get_wifi_qdv(&qdv_wifi, essid);
}
if (threeg_avail == 1) {
/* Get the QDV and APN name of 3G network */
get_3g_qdv(&qdv_3g, apn);
}
if (*apn != '\0') {
best_3g_conn = is_connected_3g(conn,apn);
if(best_3g_conn == 1){
printf("******Best 3G network = %s is connected\n",apn);
} else {
printf ("Trying to connect to %s...\n", apn);
// update_modem_paths(conn,apn);
connect_3g_modem(conn,apn);
update_modem_paths(conn,apn);
}
ip_interface = fetch_interface(conn,apn);
#if 0
if(ip_interface) {
printf("**********IP Interface for %s\t is %s********\n", apn, ip_interface);
}
else{
printf("**********IP Interface NOT FOUND for %s********\n", apn);
update_modem_paths(conn,apn);
}
#endif
}
#define DEBUG
#ifdef DEBUG
printf("QDV of WIFI: %f\t", qdv_wifi);
printf("QDV of 3G:%f\n", qdv_3g);
#endif
int active_device = get_current_network_device();
if (active_device == WIFI) {
if (((qdv_3g - qdv_wifi) >= 0) && (threeg_avail == 1)) {
old_dev = WIFI; new_dev = GSM;
strcpy(network_name, apn);
qdv_diff = qdv_3g - qdv_wifi;
printf
("vho_main : Handing over from WiFi to 3G [qdv diff = %f]\n",
qdv_diff);
send_vrms_data(ip_interface, strlen(ip_interface));
// logging_network_change(ip_interface, strlen(ip_interface));
logging_network_change(apn, strlen(apn));
}else {
/* To handle horizontal handoff. If current essid does not match
* with the essid of the network with highest QDV, then handoff
* to the highest QDV Wi-Fi network */
char *name = malloc(10);
int channel;
/* Get current essid and channel */
get_essid(name, &channel);
if (!strcmp(name, essid)) {
/* If highest QDV Wi-Fi network is current network return */
printf
("Highest QDV Wi-Fi network is current network\n");
old_dev = new_dev = WIFI;
send_vrms_data("wlan0", strlen("wlan0"));
logging_network_change("wlan0", strlen("wlan0"));
} else {
strcpy(network_name, essid);
old_dev = new_dev = WIFI;
send_vrms_data("wlan0", strlen("wlan0"));
logging_network_change("wlan0", strlen("wlan0"));
}
free(name);
}
}else if (active_device == GSM) {
if (active_device == GSM && ((qdv_wifi - qdv_3g) >= 0)
&& (wifi_avail == 1)){
printf("\n Handing over from 3G to WiFi \n");
old_dev = GSM; new_dev = WIFI;
strcpy(network_name, essid);
}
else if (active_device == GSM && ((qdv_3g - qdv_wifi) >= 0))
{
if(ip_interface){
// printf("ip interface of the best conected network%s = %s \n",apn,ip_interface);
send_vrms_data(ip_interface, strlen(ip_interface));}
// logging_network_change(ip_interface, strlen(ip_interface));
logging_network_change(apn, strlen(apn));
return;
}
else{
printf("Highest QDV GSM network is current network\n");
if(ip_interface)
send_vrms_data(ip_interface, strlen(ip_interface));
// logging_network_change(ip_interface, strlen(ip_interface));
logging_network_change(apn, strlen(apn));
}
}
else {
if (threeg_avail == -1 && wifi_avail == -1) {
printf("Both wifi and 3g interfaces not available \n");
return;
}
}
if (old_dev != new_dev) {
/* Invoke post-handoff routine to perform the handoff task */
printf ("[P_HO] new_dev = %d, old_dev = %d, network_name = %s\n",
new_dev, old_dev, network_name);
post_handoff(conn, network_name, old_dev, new_dev);
handover = 1;
}
}
