static int
_special_process(request *r, const char *mac, const char *redir_url)
{
t_offline_client *o_client = NULL;
LOCK_OFFLINE_CLIENT_LIST();
o_client = offline_client_list_find_by_mac(mac);
if(o_client == NULL) {
o_client = offline_client_list_add(r->clientAddr, mac);
} else {
o_client->last_login = time(NULL);
}
UNLOCK_OFFLINE_CLIENT_LIST();
if(_is_apple_captive(r->request.host)) {
unsigned int interval = time(NULL) - o_client->first_login;
debug(LOG_INFO, "Into captive.apple.com hit_counts %d interval %d\n", o_client->hit_counts, interval);
LOCK_OFFLINE_CLIENT_LIST();
o_client->hit_counts++;
UNLOCK_OFFLINE_CLIENT_LIST();
if(o_client->client_type == 1 ) {
if(o_client->hit_counts < 5 && interval < 30 )
http_send_js_redirect_ex(r, redir_url);
else {
http_send_apple_redirect(r, redir_url);
}
} else {
LOCK_OFFLINE_CLIENT_LIST();
o_client->client_type = 1;
UNLOCK_OFFLINE_CLIENT_LIST();
http_send_js_redirect_ex(r, redir_url);
}
return 1;
}
return 0;
}
/** The 404 handler is also responsible for redirecting to the auth server */
void
http_callback_404(httpd * webserver, request * r, int error_code)
{
char tmp_url[MAX_BUF], *url, *mac;
s_config *config = config_get_config();
t_auth_serv *auth_server = get_auth_server();
memset(tmp_url, 0, sizeof(tmp_url));
/*
* XXX Note the code below assumes that the client's request is a plain
* http request to a standard port. At any rate, this handler is called only
* if the internet/auth server is down so it's not a huge loss, but still.
*/
snprintf(tmp_url, (sizeof(tmp_url) - 1), "http://%s%s%s%s",
r->request.host, r->request.path, r->request.query[0] ? "?" : "", r->request.query);
url = httpdUrlEncode(tmp_url);
if (!is_online()) {
/* The internet connection is down at the moment - apologize and do not redirect anywhere */
char *buf;
safe_asprintf(&buf,
"<p>We apologize, but it seems that the internet connection that powers this hotspot is temporarily unavailable.</p>"
"<p>If at all possible, please notify the owners of this hotspot that the internet connection is out of service.</p>"
"<p>The maintainers of this network are aware of this disruption. We hope that this situation will be resolved soon.</p>"
"<p>In a while please <a href='%s'>click here</a> to try your request again.</p>", tmp_url);
send_http_page(r, "Internet access unavailable!", buf);
free(buf);
debug(LOG_INFO, "Sent %s an apology since I am not online - no point sending them to auth server",
r->clientAddr);
} else if (!is_auth_online()) {
/* The auth server is down at the moment - apologize and do not redirect anywhere */
char *buf;
safe_asprintf(&buf,
"<p>We apologize, but it seems that we are currently unable to re-direct you to the login screen.</p>"
"<p>The maintainers of this network are aware of this disruption. We hope that this situation will be resolved soon.</p>"
"<p>In a couple of minutes please <a href='%s'>click here</a> to try your request again.</p>",
tmp_url);
send_http_page(r, "Auth server is not online!", buf);
free(buf);
debug(LOG_INFO, "Sent %s an apology since auth server not online - no point sending them to auth server",
r->clientAddr);
} else {
/* Re-direct them to auth server */
char *urlFragment;
if (!(mac = arp_get(r->clientAddr))) {
/* We could not get their MAC address */
debug(LOG_INFO, "Failed to retrieve MAC address for ip %s, so not putting in the login request",
r->clientAddr);
safe_asprintf(&urlFragment, "%sgw_address=%s&gw_port=%d&gw_id=%s&channel_path=%s&ssid=%s&ip=%s&url=%s",
auth_server->authserv_login_script_path_fragment, config->gw_address, config->gw_port,
config->gw_id,
g_channel_path?g_channel_path:"null",
g_ssid?g_ssid:"null",
r->clientAddr, url);
} else {
t_client *clt = NULL;
debug(LOG_INFO, "Got client MAC address for ip %s: %s", r->clientAddr, mac);
safe_asprintf(&urlFragment, "%sgw_address=%s&gw_port=%d&gw_id=%s&channel_path=%s&ssid=%s&ip=%s&mac=%s&url=%s",
auth_server->authserv_login_script_path_fragment,
config->gw_address, config->gw_port, config->gw_id,
g_channel_path?g_channel_path:"null",
g_ssid?g_ssid:"null",
r->clientAddr, mac, url);
//>>> liudf 20160106 added
if(_special_process(r, mac, urlFragment)) {
free(urlFragment);
free(url);
free(mac);
return;
}
if(is_roaming(mac)) {
fw_set_roam_mac(mac);
http_send_redirect(r, tmp_url, "device roaming");
free(urlFragment);
free(url);
free(mac);
return;
}
// if device has login; but after long time reconnected router, its ip changed
LOCK_CLIENT_LIST();
clt = client_list_find_by_mac(mac);
if(clt && strcmp(clt->ip, r->clientAddr) != 0) {
fw_deny(clt);
free(clt->ip);
clt->ip = safe_strdup(r->clientAddr);
fw_allow(clt, clt->fw_connection_state);
UNLOCK_CLIENT_LIST();
http_send_redirect(r, tmp_url, "device has login");
free(urlFragment);
free(url);
free(mac);
return;
}
UNLOCK_CLIENT_LIST();
// if device is wired and wired device no need auth
if(config->wired_passed == 1 && is_device_wired(mac)) {
debug(LOG_INFO, "wired_passed: %s is wired device", mac);
t_trusted_mac *pmac = add_trusted_mac(mac);
fw_set_trusted_mac(mac);
http_send_redirect(r, tmp_url, "device no need login");
if(pmac != NULL)
pmac->ip = safe_strdup(r->clientAddr);
free(urlFragment);
free(url);
free(mac);
return;
}
//<<< liudf added end
free(mac);
}
// if host is not in whitelist, maybe not in conf or domain'IP changed, it will go to here.
debug(LOG_INFO, "Check host %s is in whitelist or not", r->request.host); // e.g. www.example.com
t_firewall_rule *rule;
//e.g. example.com is in whitelist
// if request http://www.example.com/, it's not equal example.com.
for (rule = get_ruleset("global"); config->js_filter != 1 && rule != NULL; rule = rule->next) {
debug(LOG_INFO, "rule mask %s", rule->mask);
if (strstr(r->request.host, rule->mask) == NULL) {
debug(LOG_INFO, "host %s is not in %s, continue", r->request.host, rule->mask);
continue;
}
int host_length = strlen(r->request.host);
int mask_length = strlen(rule->mask);
if (host_length != mask_length) {
char prefix[1024] = {0};
// must be *.example.com, if not have ".", maybe Phishing. e.g. phishingexample.com
strncpy(prefix, r->request.host, host_length - mask_length - 1); // e.g. www
strcat(prefix, "."); // www.
strcat(prefix, rule->mask); // www.example.com
if (strcasecmp(r->request.host, prefix) == 0) {
debug(LOG_INFO, "allow subdomain");
fw_allow_host(r->request.host);
http_send_redirect(r, tmp_url, "allow subdomain");
free(url);
free(urlFragment);
return;
}
} else {
// e.g. "example.com" is in conf, so it had been parse to IP and added into "iptables allow" when wifidog start. but then its' A record(IP) changed, it will go to here.
debug(LOG_INFO, "allow domain again, because IP changed");
fw_allow_host(r->request.host);
http_send_redirect(r, tmp_url, "allow domain");
free(url);
free(urlFragment);
return;
}
}
debug(LOG_INFO, "Captured %s requesting [%s] and re-directing them to login page", r->clientAddr, url);
if(config->js_filter)
http_send_js_redirect_ex(r, urlFragment);
else
http_send_redirect_to_auth(r, urlFragment, "Redirect to login page");
free(urlFragment);
}
free(url);
}
