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dbus: Use the new BSS table with the new D-Bus API

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Replace the scan results -based implementation with the use of information
from the new BSS table maintained by wpa_supplicant to get a more stable
source of BSS data. Change the use of BSSID as the key for the BSS object
to use the BSS table unique identifier so that multi-SSID APs can be
handled properly.
This commit is contained in:
Jouni Malinen 2009-12-28 01:10:07 +02:00
parent 99a6a63f25
commit ccd286d025
5 changed files with 40 additions and 71 deletions
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27
wpa_supplicant/dbus/dbus_new.c
View file

@ -2,6 +2,7 @@
* WPA Supplicant / dbus-based control interface
* Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
* Copyright (c) 2009, Witold Sowa <witold.sowa@gmail.com>
* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
*
* 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
@ -16,10 +17,10 @@
#include "includes.h"
#include "common.h"
#include "drivers/driver.h"
#include "wps/wps.h"
#include "../config.h"
#include "../wpa_supplicant_i.h"
#include "../bss.h"
#include "dbus_new_helpers.h"
#include "dbus_dict_helpers.h"
#include "dbus_new.h"
@ -1242,12 +1243,13 @@ static int wpas_dbus_unregister_network(struct wpa_supplicant *wpa_s, int nid)
* wpas_dbus_unregister_bss - Unregister a scanned BSS from dbus
* @wpa_s: wpa_supplicant interface structure
* @bssid: scanned network bssid
* @id: unique BSS identifier
* Returns: 0 on success, -1 on failure
*
* Unregisters BSS representing object from dbus
*/
static int wpas_dbus_unregister_bss(struct wpa_supplicant *wpa_s,
u8 bssid[ETH_ALEN])
u8 bssid[ETH_ALEN], unsigned int id)
{
struct ctrl_iface_dbus_new_priv *ctrl_iface;
char *bss_obj_path;
@ -1264,8 +1266,8 @@ static int wpas_dbus_unregister_bss(struct wpa_supplicant *wpa_s,
return -1;
os_snprintf(bss_obj_path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/" WPAS_DBUS_BSSID_FORMAT,
wpas_dbus_get_path(wpa_s), MAC2STR(bssid));
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/%u",
wpas_dbus_get_path(wpa_s), id);
if (wpa_dbus_unregister_object_per_iface(ctrl_iface, bss_obj_path)) {
wpa_printf(MSG_ERROR,
@ -1286,12 +1288,13 @@ static int wpas_dbus_unregister_bss(struct wpa_supplicant *wpa_s,
* wpas_dbus_register_bss - Register a scanned BSS with dbus
* @wpa_s: wpa_supplicant interface structure
* @bssid: scanned network bssid
* @id: unique BSS identifier
* Returns: 0 on success, -1 on failure
*
* Registers BSS representing object with dbus
*/
static int wpas_dbus_register_bss(struct wpa_supplicant *wpa_s,
u8 bssid[ETH_ALEN])
u8 bssid[ETH_ALEN], unsigned int id)
{
struct ctrl_iface_dbus_new_priv *ctrl_iface;
struct wpa_dbus_object_desc *obj_desc;
@ -1311,8 +1314,8 @@ static int wpas_dbus_register_bss(struct wpa_supplicant *wpa_s,
return -1;
os_snprintf(bss_obj_path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/" WPAS_DBUS_BSSID_FORMAT,
wpas_dbus_get_path(wpa_s), MAC2STR(bssid));
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/%u",
wpas_dbus_get_path(wpa_s), id);
obj_desc = os_zalloc(sizeof(struct wpa_dbus_object_desc));
if (!obj_desc) {
@ -1328,7 +1331,7 @@ static int wpas_dbus_register_bss(struct wpa_supplicant *wpa_s,
goto err;
}
arg->wpa_s = wpa_s;
os_memcpy(arg->bssid, bssid, ETH_ALEN);
arg->id = id;
/* Properties property */
wpa_dbus_property_register(obj_desc, WPAS_DBUS_NEW_IFACE_BSSID,
@ -1636,7 +1639,7 @@ static int wpas_dbus_unregister_interface(struct wpa_supplicant *wpa_s)
{
struct ctrl_iface_dbus_new_priv *ctrl_iface;
struct wpa_ssid *ssid;
size_t i;
struct wpa_bss *bss;
/* Do nothing if the control interface is not turned on */
if (wpa_s == NULL || wpa_s->global == NULL)
@ -1646,10 +1649,8 @@ static int wpas_dbus_unregister_interface(struct wpa_supplicant *wpa_s)
return 0;
/* unregister all BSSs and networks from dbus */
for (i = 0; wpa_s->scan_res && i < wpa_s->scan_res->num; i++) {
wpas_dbus_unregister_bss(wpa_s,
wpa_s->scan_res->res[i]->bssid);
}
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
wpas_dbus_unregister_bss(wpa_s, bss->bssid, bss->id);
ssid = wpa_s->conf->ssid;
while (ssid) {

7
wpa_supplicant/dbus/dbus_new.h
View file

@ -63,9 +63,10 @@ struct wpas_dbus_callbacks {
void (*signal_network_enabled_changed)(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid);
int (*register_bss)(struct wpa_supplicant *wpa_s, u8 bssid[ETH_ALEN]);
int (*register_bss)(struct wpa_supplicant *wpa_s, u8 bssid[ETH_ALEN],
unsigned int id);
int (*unregister_bss)(struct wpa_supplicant *wpa_s,
u8 bssid[ETH_ALEN]);
u8 bssid[ETH_ALEN], unsigned int id);
void (*signal_prop_changed)(struct wpa_supplicant *wpa_s,
enum wpas_dbus_prop property);
@ -123,8 +124,6 @@ struct wpas_dbus_callbacks {
#define WPAS_DBUS_ERROR_BLOB_UNKNOWN \
WPAS_DBUS_NEW_IFACE_INTERFACE ".BlobUnknown"
#define WPAS_DBUS_BSSID_FORMAT "%02x%02x%02x%02x%02x%02x"
struct wpas_dbus_callbacks * wpas_dbus_get_callbacks(void);
const char * wpas_dbus_get_path(struct wpa_supplicant *wpa_s);

71
wpa_supplicant/dbus/dbus_new_handlers.c
View file

@ -2,6 +2,7 @@
* WPA Supplicant / dbus-based control interface
* Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
* Copyright (c) 2009, Witold Sowa <witold.sowa@gmail.com>
* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
*
* 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
@ -24,6 +25,7 @@
#include "../driver_i.h"
#include "../notify.h"
#include "../wpas_glue.h"
#include "../bss.h"
#include "dbus_new_helpers.h"
#include "dbus_new.h"
#include "dbus_new_handlers.h"
@ -184,18 +186,6 @@ static dbus_bool_t should_quote_opt(const char *key)
return TRUE;
}
static struct wpa_scan_res * find_scan_result(struct bss_handler_args *bss)
{
struct wpa_scan_results *results = bss->wpa_s->scan_res;
size_t i;
for (i = 0; results && i < results->num; i++) {
if (!os_memcmp(results->res[i]->bssid, bss->bssid, ETH_ALEN))
return results->res[i];
}
return NULL;
}
/**
* get_iface_by_dbus_path - Get a new network interface
* @global: Pointer to global data from wpa_supplicant_init()
@ -2274,7 +2264,7 @@ DBusMessage * wpas_dbus_getter_current_bss(DBusMessage *message,
DBusMessageIter iter, variant_iter;
const char *path = wpas_dbus_get_path(wpa_s);
char *bss_obj_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
int is_bssid_known = 0;
struct wpa_bss *bss = NULL;
if (bss_obj_path == NULL) {
perror("wpas_dbus_getter_current_bss[dbus]: out of "
@ -2283,22 +2273,14 @@ DBusMessage * wpas_dbus_getter_current_bss(DBusMessage *message,
NULL);
}
if (!is_zero_ether_addr(wpa_s->bssid)) {
size_t i;
for (i = 0; wpa_s->scan_res && i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *res = wpa_s->scan_res->res[i];
if (!os_memcmp(wpa_s->bssid, res->bssid, ETH_ALEN)) {
is_bssid_known = 1;
break;
}
}
}
/* TODO: store current BSS or BSS id in wpa_s */
if (!is_zero_ether_addr(wpa_s->bssid))
bss = wpa_bss_get_bssid(wpa_s, wpa_s->bssid);
if (is_bssid_known)
if (bss)
os_snprintf(bss_obj_path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/"
WPAS_DBUS_BSSID_FORMAT,
path, MAC2STR(wpa_s->bssid));
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/%u",
path, bss->id);
else
os_snprintf(bss_obj_path, WPAS_DBUS_OBJECT_PATH_MAX, "/");
@ -2465,15 +2447,7 @@ DBusMessage * wpas_dbus_getter_bsss(DBusMessage *message,
{
DBusMessage *reply = NULL;
DBusMessageIter iter, variant_iter, array_iter;
size_t i;
/* Ensure we've actually got scan results to return */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0) {
wpa_printf(MSG_ERROR, "wpas_dbus_getter_bsss[dbus]: "
"An error occurred getting scan results.");
return wpas_dbus_error_unknown_error(message, NULL);
}
struct wpa_bss *bss;
/* Create and initialize the return message */
if (message == NULL)
@ -2504,8 +2478,7 @@ DBusMessage * wpas_dbus_getter_bsss(DBusMessage *message,
}
/* Loop through scan results and append each result's object path */
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *res = wpa_s->scan_res->res[i];
dl_list_for_each(bss, &wpa_s->bss_id, struct wpa_bss, list_id) {
char *path;
path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
@ -2518,14 +2491,10 @@ DBusMessage * wpas_dbus_getter_bsss(DBusMessage *message,
NULL);
goto out;
}
/* Construct the object path for this BSS. Note that ':'
* is not a valid character in dbus object paths.
*/
/* Construct the object path for this BSS. */
os_snprintf(path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/"
WPAS_DBUS_BSSID_FORMAT,
wpas_dbus_get_path(wpa_s),
MAC2STR(res->bssid));
"%s/" WPAS_DBUS_NEW_BSSIDS_PART "/%u",
wpas_dbus_get_path(wpa_s), bss->id);
dbus_message_iter_append_basic(&array_iter,
DBUS_TYPE_OBJECT_PATH, &path);
os_free(path);
@ -2798,7 +2767,7 @@ DBusMessage * wpas_dbus_getter_bss_properties(DBusMessage *message,
DBusMessage *reply = NULL;
DBusMessageIter iter, iter_dict, variant_iter;
const u8 *ie;
struct wpa_scan_res *res = find_scan_result(bss);
struct wpa_bss *res = wpa_bss_get_id(bss->wpa_s, bss->id);
if (res == NULL)
return NULL;
@ -2826,7 +2795,7 @@ DBusMessage * wpas_dbus_getter_bss_properties(DBusMessage *message,
ETH_ALEN))
goto error;
ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
ie = wpa_bss_get_ie(res, WLAN_EID_SSID);
if (ie) {
if (!wpa_dbus_dict_append_byte_array(&iter_dict, "SSID",
(const char *) (ie + 2),
@ -2834,7 +2803,7 @@ DBusMessage * wpas_dbus_getter_bss_properties(DBusMessage *message,
goto error;
}
ie = wpa_scan_get_vendor_ie(res, WPA_IE_VENDOR_TYPE);
ie = wpa_bss_get_vendor_ie(res, WPA_IE_VENDOR_TYPE);
if (ie) {
if (!wpa_dbus_dict_append_byte_array(&iter_dict, "WPAIE",
(const char *) ie,
@ -2842,7 +2811,7 @@ DBusMessage * wpas_dbus_getter_bss_properties(DBusMessage *message,
goto error;
}
ie = wpa_scan_get_ie(res, WLAN_EID_RSN);
ie = wpa_bss_get_ie(res, WLAN_EID_RSN);
if (ie) {
if (!wpa_dbus_dict_append_byte_array(&iter_dict, "RSNIE",
(const char *) ie,
@ -2850,7 +2819,7 @@ DBusMessage * wpas_dbus_getter_bss_properties(DBusMessage *message,
goto error;
}
ie = wpa_scan_get_vendor_ie(res, WPS_IE_VENDOR_TYPE);
ie = wpa_bss_get_vendor_ie(res, WPS_IE_VENDOR_TYPE);
if (ie) {
if (!wpa_dbus_dict_append_byte_array(&iter_dict, "WPSIE",
(const char *) ie,
@ -2876,7 +2845,7 @@ DBusMessage * wpas_dbus_getter_bss_properties(DBusMessage *message,
!wpa_dbus_dict_append_int32(&iter_dict, "Level", res->level))
goto error;
if (!wpa_dbus_dict_append_int32(&iter_dict, "MaxRate",
wpa_scan_get_max_rate(res) * 500000))
wpa_bss_get_max_rate(res) * 500000))
goto error;
if (!wpa_dbus_dict_close_write(&iter, &iter_dict))

2
wpa_supplicant/dbus/dbus_new_handlers.h
View file

@ -22,7 +22,7 @@ struct network_handler_args {
struct bss_handler_args {
struct wpa_supplicant *wpa_s;
u8 bssid[ETH_ALEN];
unsigned int id;
};
DBusMessage * wpas_dbus_handler_create_interface(DBusMessage *message,

4
wpa_supplicant/notify.c
View file

@ -244,7 +244,7 @@ void wpas_notify_bss_added(struct wpa_supplicant *wpa_s,
{
struct wpas_dbus_callbacks *cbs = wpas_dbus_get_callbacks();
if (cbs)
cbs->register_bss(wpa_s, bssid);
cbs->register_bss(wpa_s, bssid, id);
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_BSS_ADDED "%u " MACSTR,
id, MAC2STR(bssid));
}
@ -255,7 +255,7 @@ void wpas_notify_bss_removed(struct wpa_supplicant *wpa_s,
{
struct wpas_dbus_callbacks *cbs = wpas_dbus_get_callbacks();
if (cbs)
cbs->unregister_bss(wpa_s, bssid);
cbs->unregister_bss(wpa_s, bssid, id);
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_BSS_REMOVED "%u " MACSTR,
id, MAC2STR(bssid));
}