void
http_callback_auth(httpd * webserver, request * r)
{
t_client *client;
httpVar *token;
char *mac;
httpVar *logout = httpdGetVariableByName(r, "logout");
const s_config *config = config_get_config();
if ((token = httpdGetVariableByName(r, "token"))) {
/* They supplied variable "token" */
if (!(mac = arp_get(r->clientAddr))) {
/* We could not get their MAC address */
debug(LOG_ERR, "Failed to retrieve MAC address for ip %s", r->clientAddr);
send_http_page(r, "WiFiDog Error", "Failed to retrieve your MAC address");
} else {
t_redir_node *node;
int index = 0;
LOCK_REDIR();
node = redir_list_find(mac);
if (node) {
index = node->wlindex;
}
UNLOCK_REDIR();
/* We have their MAC address */
LOCK_CLIENT_LIST();
if ((client = client_list_find(r->clientAddr, mac)) == NULL) {
debug(LOG_DEBUG, "New client for %s", r->clientAddr);
client = client_list_add(r->clientAddr, mac, token->value);
client->fw_connection_state = FW_MARK_REDIR;
client->counters.active_duration = config->sessiontimeout[index-1];
} else if (logout) {
logout_client(client);
} else {
debug(LOG_DEBUG, "Client for %s is already in the client list", client->ip);
}
UNLOCK_CLIENT_LIST();
if (!logout) { /* applies for case 1 and 3 from above if */
authenticate_client(r);
}
free(mac);
}
} else {
/* They did not supply variable "token" */
send_http_page(r, "WiFiDog error", "Invalid token");
}
}
void
http_callback_disconnect(httpd * webserver, request * r)
{
const s_config *config = config_get_config();
/* XXX How do you change the status code for the response?? */
httpVar *token = httpdGetVariableByName(r, "token");
httpVar *mac = httpdGetVariableByName(r, "mac");
if (config->httpdusername &&
(strcmp(config->httpdusername, r->request.authUser) ||
strcmp(config->httpdpassword, r->request.authPassword))) {
debug(LOG_INFO, "Disconnect requested, forcing authentication");
httpdForceAuthenticate(r, config->httpdrealm);
return;
}
if (token && mac) {
t_client *client;
LOCK_CLIENT_LIST();
client = client_list_find_by_mac(mac->value);
if (!client || strcmp(client->token, token->value)) {
UNLOCK_CLIENT_LIST();
debug(LOG_INFO, "Disconnect %s with incorrect token %s", mac->value, token->value);
httpdOutput(r, "Invalid token for MAC");
return;
}
/* TODO: get current firewall counters */
logout_client(client);
UNLOCK_CLIENT_LIST();
} else {
debug(LOG_INFO, "Disconnect called without both token and MAC given");
httpdOutput(r, "Both the token and MAC need to be specified");
return;
}
return;
}
void
http_callback_auth(httpd * webserver, request * r)
{
t_client *client;
httpVar *token;
char *mac;
httpVar *logout = httpdGetVariableByName(r, "logout");
if ((token = httpdGetVariableByName(r, "token"))) {
/* They supplied variable "token" */
if (!(mac = arp_get(r->clientAddr))) {
/* We could not get their MAC address */
debug(LOG_ERR, "Failed to retrieve MAC address for ip %s", r->clientAddr);
send_http_page(r, "WiFiDog Error", "Failed to retrieve your MAC address");
} else {
/* We have their MAC address */
LOCK_CLIENT_LIST();
if ((client = client_list_find(r->clientAddr, mac)) == NULL) {
debug(LOG_DEBUG, "New client for %s", r->clientAddr);
client_list_add(r->clientAddr, mac, token->value);
} else if (logout) {
logout_client(client);
} else {
debug(LOG_DEBUG, "Client for %s is already in the client list", client->ip);
}
UNLOCK_CLIENT_LIST();
if (!logout) { /* applies for case 1 and 3 from above if */
authenticate_client(r);
}
free(mac);
}
} else {
/* They did not supply variable "token" */
send_http_page(r, "WiFiDog error", "Invalid token");
}
}
/**Probably a misnomer, this function actually refreshes the entire client list's traffic counter, re-authenticates every client with the central server and update's the central servers traffic counters and notifies it if a client has logged-out.
* @todo Make this function smaller and use sub-fonctions
*/
void
fw_sync_with_authserver(void)
{
t_authresponse authresponse;
t_client *p1, *p2, *worklist, *tmp;
s_config *config = config_get_config();
if (-1 == iptables_fw_counters_update()) {
debug(LOG_ERR, "Could not get counters from firewall!");
return;
}
LOCK_CLIENT_LIST();
/* XXX Ideally, from a thread safety PoV, this function should build a list of client pointers,
* iterate over the list and have an explicit "client still valid" check while list is locked.
* That way clients can disappear during the cycle with no risk of trashing the heap or getting
* a SIGSEGV.
*/
client_list_dup(&worklist);
UNLOCK_CLIENT_LIST();
for (p1 = p2 = worklist; NULL != p1; p1 = p2) {
p2 = p1->next;
/* Ping the client, if he responds it'll keep activity on the link.
* However, if the firewall blocks it, it will not help. The suggested
* way to deal witht his is to keep the DHCP lease time extremely
* short: Shorter than config->checkinterval * config->clienttimeout */
icmp_ping(p1->ip);
/* Update the counters on the remote server only if we have an auth server */
if (config->auth_servers != NULL) {
auth_server_request(&authresponse, REQUEST_TYPE_COUNTERS, p1->ip, p1->mac, p1->token, p1->counters.incoming,
p1->counters.outgoing, p1->counters.incoming_delta, p1->counters.outgoing_delta);
}
time_t current_time = time(NULL);
debug(LOG_INFO,
"Checking client %s for timeout: Last updated %ld (%ld seconds ago), timeout delay %ld seconds, current time %ld, ",
p1->ip, p1->counters.last_updated, current_time - p1->counters.last_updated,
config->checkinterval * config->clienttimeout, current_time);
if (p1->counters.last_updated + (config->checkinterval * config->clienttimeout) <= current_time) {
/* Timing out user */
debug(LOG_INFO, "%s - Inactive for more than %ld seconds, removing client and denying in firewall",
p1->ip, config->checkinterval * config->clienttimeout);
LOCK_CLIENT_LIST();
tmp = client_list_find_by_client(p1);
if (NULL != tmp) {
logout_client(tmp);
} else {
debug(LOG_NOTICE, "Client was already removed. Not logging out.");
}
UNLOCK_CLIENT_LIST();
} else {
/*
* This handles any change in
* the status this allows us
* to change the status of a
* user while he's connected
*
* Only run if we have an auth server
* configured!
*/
LOCK_CLIENT_LIST();
tmp = client_list_find_by_client(p1);
if (NULL == tmp) {
UNLOCK_CLIENT_LIST();
debug(LOG_NOTICE, "Client was already removed. Skipping auth processing");
continue; /* Next client please */
}
if (config->auth_servers != NULL) {
switch (authresponse.authcode) {
case AUTH_DENIED:
debug(LOG_NOTICE, "%s - Denied. Removing client and firewall rules", tmp->ip);
fw_deny(tmp);
client_list_delete(tmp);
break;
case AUTH_VALIDATION_FAILED:
debug(LOG_NOTICE, "%s - Validation timeout, now denied. Removing client and firewall rules",
tmp->ip);
fw_deny(tmp);
client_list_delete(tmp);
break;
case AUTH_ALLOWED:
if (tmp->fw_connection_state != FW_MARK_KNOWN) {
debug(LOG_INFO, "%s - Access has changed to allowed, refreshing firewall and clearing counters",
tmp->ip);
//WHY did we deny, then allow!?!? benoitg 2007-06-21
//fw_deny(tmp->ip, tmp->mac, tmp->fw_connection_state); /* XXX this was possibly to avoid dupes. */
if (tmp->fw_connection_state != FW_MARK_PROBATION) {
tmp->counters.incoming_delta =
tmp->counters.outgoing_delta =
tmp->counters.incoming =
tmp->counters.outgoing = 0;
} else {
//We don't want to clear counters if the user was in validation, it probably already transmitted data..
debug(LOG_INFO,
"%s - Skipped clearing counters after all, the user was previously in validation",
tmp->ip);
}
fw_allow(tmp, FW_MARK_KNOWN);
}
break;
case AUTH_VALIDATION:
/*
* Do nothing, user
* is in validation
* period
*/
debug(LOG_INFO, "%s - User in validation period", tmp->ip);
break;
case AUTH_ERROR:
debug(LOG_WARNING, "Error communicating with auth server - leaving %s as-is for now", tmp->ip);
break;
default:
debug(LOG_ERR, "I do not know about authentication code %d", authresponse.authcode);
break;
}
}
UNLOCK_CLIENT_LIST();
}
}
client_list_destroy(worklist);
}
