hostap/wpa_supplicant/dbus/dbus_old_handlers_wps.c
Jouni Malinen e422a819d0 Check snprintf result to avoid compiler warnings
These do not really get truncated in practice, but it looks like some
newer compilers warn about the prints, so silence those by checking the
result and do something a bit more useful if the output would actually
get truncated.

Signed-off-by: Jouni Malinen <j@w1.fi>
2018-12-24 11:09:22 +02:00

156 lines
4.1 KiB
C

/*
* WPA Supplicant / dbus-based control interface (WPS)
* Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include <dbus/dbus.h>
#include "common.h"
#include "../config.h"
#include "../wpa_supplicant_i.h"
#include "../wps_supplicant.h"
#include "dbus_old.h"
#include "dbus_old_handlers.h"
/**
* wpas_dbus_iface_wps_pbc - Request credentials using WPS PBC method
* @message: Pointer to incoming dbus message
* @wpa_s: %wpa_supplicant data structure
* Returns: A dbus message containing a UINT32 indicating success (1) or
* failure (0)
*
* Handler function for "wpsPbc" method call
*/
DBusMessage * wpas_dbus_iface_wps_pbc(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
char *arg_bssid = NULL;
u8 bssid[ETH_ALEN];
int ret = 0;
if (!dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &arg_bssid,
DBUS_TYPE_INVALID))
return wpas_dbus_new_invalid_opts_error(message, NULL);
if (os_strcmp(arg_bssid, "any") == 0)
ret = wpas_wps_start_pbc(wpa_s, NULL, 0);
else if (!hwaddr_aton(arg_bssid, bssid))
ret = wpas_wps_start_pbc(wpa_s, bssid, 0);
else {
return wpas_dbus_new_invalid_opts_error(message,
"Invalid BSSID");
}
if (ret < 0) {
return dbus_message_new_error(
message, WPAS_ERROR_WPS_PBC_ERROR,
"Could not start PBC negotiation");
}
return wpas_dbus_new_success_reply(message);
}
/**
* wpas_dbus_iface_wps_pin - Establish the PIN number of the enrollee
* @message: Pointer to incoming dbus message
* @wpa_s: %wpa_supplicant data structure
* Returns: A dbus message containing a UINT32 indicating success (1) or
* failure (0)
*
* Handler function for "wpsPin" method call
*/
DBusMessage * wpas_dbus_iface_wps_pin(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
DBusMessage *reply = NULL;
char *arg_bssid;
char *pin = NULL;
u8 bssid[ETH_ALEN], *_bssid = NULL;
int ret;
char npin[9];
if (!dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &arg_bssid,
DBUS_TYPE_STRING, &pin, DBUS_TYPE_INVALID))
return wpas_dbus_new_invalid_opts_error(message, NULL);
if (os_strcmp(arg_bssid, "any") == 0)
_bssid = NULL;
else if (!hwaddr_aton(arg_bssid, bssid))
_bssid = bssid;
else {
return wpas_dbus_new_invalid_opts_error(message,
"Invalid BSSID");
}
if (os_strlen(pin) > 0)
ret = wpas_wps_start_pin(wpa_s, _bssid, pin, 0,
DEV_PW_DEFAULT);
else
ret = wpas_wps_start_pin(wpa_s, _bssid, NULL, 0,
DEV_PW_DEFAULT);
if (ret < 0) {
return dbus_message_new_error(message,
WPAS_ERROR_WPS_PIN_ERROR,
"Could not init PIN");
}
reply = dbus_message_new_method_return(message);
if (reply == NULL)
return NULL;
if (ret > 0) {
ret = os_snprintf(npin, sizeof(npin), "%08d", ret);
if (os_snprintf_error(sizeof(npin), ret))
return wpas_dbus_new_invalid_opts_error(message,
"invalid PIN");
pin = npin;
}
dbus_message_append_args(reply, DBUS_TYPE_STRING, &pin,
DBUS_TYPE_INVALID);
return reply;
}
/**
* wpas_dbus_iface_wps_reg - Request credentials using the PIN of the AP
* @message: Pointer to incoming dbus message
* @wpa_s: %wpa_supplicant data structure
* Returns: A dbus message containing a UINT32 indicating success (1) or
* failure (0)
*
* Handler function for "wpsReg" method call
*/
DBusMessage * wpas_dbus_iface_wps_reg(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
char *arg_bssid;
char *pin = NULL;
u8 bssid[ETH_ALEN];
int ret = 0;
if (!dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &arg_bssid,
DBUS_TYPE_STRING, &pin, DBUS_TYPE_INVALID))
return wpas_dbus_new_invalid_opts_error(message, NULL);
if (!hwaddr_aton(arg_bssid, bssid))
ret = wpas_wps_start_reg(wpa_s, bssid, pin, NULL);
else {
return wpas_dbus_new_invalid_opts_error(message,
"Invalid BSSID");
}
if (ret < 0) {
return dbus_message_new_error(message,
WPAS_ERROR_WPS_REG_ERROR,
"Could not request credentials");
}
return wpas_dbus_new_success_reply(message);
}