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fragattacks/wpa_supplicant/hs20_supplicant.c
Jouni Malinen 61f25f80b4 HS 2.0: Remove duplicate icon entries 
Only one of the icon entries with a matching BSSID and file name can be
fetched from wpa_supplicant and as such, there is no need to maintain
the old data if it was not explicitly deleted before running a new fetch
for the same BSSID and icon. Remove older duplicated entries whenever
completing a pending icon fetch to optimize memory use.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-12-19 18:53:27 +02:00

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/*
* Copyright (c) 2009, Atheros Communications, Inc.
* Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include <sys/stat.h>
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_common.h"
#include "common/ieee802_11_defs.h"
#include "common/gas.h"
#include "common/wpa_ctrl.h"
#include "rsn_supp/wpa.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "config.h"
#include "scan.h"
#include "bss.h"
#include "blacklist.h"
#include "gas_query.h"
#include "interworking.h"
#include "hs20_supplicant.h"
#include "base64.h"
#define OSU_MAX_ITEMS 10
struct osu_lang_string {
char lang[4];
char text[253];
};
struct osu_icon {
u16 width;
u16 height;
char lang[4];
char icon_type[256];
char filename[256];
unsigned int id;
unsigned int failed:1;
};
struct osu_provider {
u8 bssid[ETH_ALEN];
u8 osu_ssid[SSID_MAX_LEN];
u8 osu_ssid_len;
char server_uri[256];
u32 osu_methods; /* bit 0 = OMA-DM, bit 1 = SOAP-XML SPP */
char osu_nai[256];
struct osu_lang_string friendly_name[OSU_MAX_ITEMS];
size_t friendly_name_count;
struct osu_lang_string serv_desc[OSU_MAX_ITEMS];
size_t serv_desc_count;
struct osu_icon icon[OSU_MAX_ITEMS];
size_t icon_count;
};
void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id)
{
u8 conf;
wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
wpabuf_put_u8(buf, pps_mo_id >= 0 ? 7 : 5);
wpabuf_put_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
conf = HS20_VERSION;
if (pps_mo_id >= 0)
conf |= HS20_PPS_MO_ID_PRESENT;
wpabuf_put_u8(buf, conf);
if (pps_mo_id >= 0)
wpabuf_put_le16(buf, pps_mo_id);
}
int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
struct wpa_bss *bss)
{
if (!wpa_s->conf->hs20 || !ssid)
return 0;
if (ssid->parent_cred)
return 1;
if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
return 0;
/*
* This may catch some non-Hotspot 2.0 cases, but it is safer to do that
* than cause Hotspot 2.0 connections without indication element getting
* added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
*/
if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
return 0;
if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
return 0;
if (ssid->proto != WPA_PROTO_RSN)
return 0;
return 1;
}
int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
{
struct wpa_cred *cred;
if (ssid == NULL)
return 0;
if (ssid->update_identifier)
return ssid->update_identifier;
if (ssid->parent_cred == NULL)
return 0;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (ssid->parent_cred == cred)
return cred->update_identifier;
}
return 0;
}
void hs20_put_anqp_req(u32 stypes, const u8 *payload, size_t payload_len,
struct wpabuf *buf)
{
u8 *len_pos;
if (buf == NULL)
return;
len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
wpabuf_put_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
wpabuf_put_u8(buf, 0); /* Reserved */
if (payload)
wpabuf_put_data(buf, payload, payload_len);
} else if (stypes == BIT(HS20_STYPE_ICON_REQUEST)) {
wpabuf_put_u8(buf, HS20_STYPE_ICON_REQUEST);
wpabuf_put_u8(buf, 0); /* Reserved */
if (payload)
wpabuf_put_data(buf, payload, payload_len);
} else {
u8 i;
wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
wpabuf_put_u8(buf, 0); /* Reserved */
for (i = 0; i < 32; i++) {
if (stypes & BIT(i))
wpabuf_put_u8(buf, i);
}
}
gas_anqp_set_element_len(buf, len_pos);
gas_anqp_set_len(buf);
}
struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
size_t payload_len)
{
struct wpabuf *buf;
buf = gas_anqp_build_initial_req(0, 100 + payload_len);
if (buf == NULL)
return NULL;
hs20_put_anqp_req(stypes, payload, payload_len, buf);
return buf;
}
int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
const u8 *payload, size_t payload_len, int inmem)
{
struct wpabuf *buf;
int ret = 0;
int freq;
struct wpa_bss *bss;
int res;
struct icon_entry *icon_entry;
bss = wpa_bss_get_bssid(wpa_s, dst);
if (!bss) {
wpa_printf(MSG_WARNING,
"ANQP: Cannot send query to unknown BSS "
MACSTR, MAC2STR(dst));
return -1;
}
wpa_bss_anqp_unshare_alloc(bss);
freq = bss->freq;
wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
"subtypes 0x%x", MAC2STR(dst), stypes);
buf = hs20_build_anqp_req(stypes, payload, payload_len);
if (buf == NULL)
return -1;
res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
if (res < 0) {
wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
wpabuf_free(buf);
return -1;
} else
wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
"%u", res);
if (inmem) {
icon_entry = os_zalloc(sizeof(struct icon_entry));
if (!icon_entry)
return -1;
os_memcpy(icon_entry->bssid, dst, ETH_ALEN);
icon_entry->file_name = os_malloc(payload_len + 1);
if (!icon_entry->file_name) {
os_free(icon_entry);
return -1;
}
os_memcpy(icon_entry->file_name, payload, payload_len);
icon_entry->file_name[payload_len] = '\0';
icon_entry->dialog_token = res;
dl_list_add(&wpa_s->icon_head, &icon_entry->list);
}
return ret;
}
static struct icon_entry * hs20_find_icon(struct wpa_supplicant *wpa_s,
const u8 *bssid,
const char *file_name)
{
struct icon_entry *icon;
dl_list_for_each(icon, &wpa_s->icon_head, struct icon_entry, list) {
if (os_memcmp(icon->bssid, bssid, ETH_ALEN) == 0 &&
os_strcmp(icon->file_name, file_name) == 0 && icon->image)
return icon;
}
return NULL;
}
int hs20_get_icon(struct wpa_supplicant *wpa_s, const u8 *bssid,
const char *file_name, size_t offset, size_t size,
char *reply, size_t buf_len)
{
struct icon_entry *icon;
size_t out_size;
unsigned char *b64;
size_t b64_size;
int reply_size;
wpa_printf(MSG_DEBUG, "HS20: Get icon " MACSTR " %s @ %u +%u (%u)",
MAC2STR(bssid), file_name, (unsigned int) offset,
(unsigned int) size, (unsigned int) buf_len);
icon = hs20_find_icon(wpa_s, bssid, file_name);
if (!icon || !icon->image || offset >= icon->image_len)
return -1;
if (size > icon->image_len - offset)
size = icon->image_len - offset;
out_size = buf_len - 3 /* max base64 padding */;
if (size * 4 > out_size * 3)
size = out_size * 3 / 4;
if (size == 0)
return -1;
b64 = base64_encode(&icon->image[offset], size, &b64_size);
if (buf_len >= b64_size) {
os_memcpy(reply, b64, b64_size);
reply_size = b64_size;
} else {
reply_size = -1;
}
os_free(b64);
return reply_size;
}
static void hs20_free_icon_entry(struct icon_entry *icon)
{
wpa_printf(MSG_DEBUG, "HS20: Free stored icon from " MACSTR
" dialog_token=%u file_name=%s image_len=%u",
MAC2STR(icon->bssid), icon->dialog_token,
icon->file_name ? icon->file_name : "N/A",
(unsigned int) icon->image_len);
os_free(icon->file_name);
os_free(icon->image);
os_free(icon);
}
int hs20_del_icon(struct wpa_supplicant *wpa_s, const u8 *bssid,
const char *file_name)
{
struct icon_entry *icon, *tmp;
int count = 0;
if (!bssid)
wpa_printf(MSG_DEBUG, "HS20: Delete all stored icons");
else if (!file_name)
wpa_printf(MSG_DEBUG, "HS20: Delete all stored icons for "
MACSTR, MAC2STR(bssid));
else
wpa_printf(MSG_DEBUG, "HS20: Delete stored icons for "
MACSTR " file name %s", MAC2STR(bssid), file_name);
dl_list_for_each_safe(icon, tmp, &wpa_s->icon_head, struct icon_entry,
list) {
if ((!bssid || os_memcmp(icon->bssid, bssid, ETH_ALEN) == 0) &&
(!file_name ||
os_strcmp(icon->file_name, file_name) == 0)) {
dl_list_del(&icon->list);
hs20_free_icon_entry(icon);
count++;
}
}
return count == 0 ? -1 : 0;
}
static void hs20_set_osu_access_permission(const char *osu_dir,
const char *fname)
{
struct stat statbuf;
/* Get OSU directory information */
if (stat(osu_dir, &statbuf) < 0) {
wpa_printf(MSG_WARNING, "Cannot stat the OSU directory %s",
osu_dir);
return;
}
if (chmod(fname, statbuf.st_mode) < 0) {
wpa_printf(MSG_WARNING,
"Cannot change the permissions for %s", fname);
return;
}
if (chown(fname, statbuf.st_uid, statbuf.st_gid) < 0) {
wpa_printf(MSG_WARNING, "Cannot change the ownership for %s",
fname);
}
}
static void hs20_remove_duplicate_icons(struct wpa_supplicant *wpa_s,
struct icon_entry *new_icon)
{
struct icon_entry *icon, *tmp;
dl_list_for_each_safe(icon, tmp, &wpa_s->icon_head, struct icon_entry,
list) {
if (icon == new_icon)
continue;
if (os_memcmp(icon->bssid, new_icon->bssid, ETH_ALEN) == 0 &&
os_strcmp(icon->file_name, new_icon->file_name) == 0) {
dl_list_del(&icon->list);
hs20_free_icon_entry(icon);
}
}
}
static int hs20_process_icon_binary_file(struct wpa_supplicant *wpa_s,
const u8 *sa, const u8 *pos,
size_t slen, u8 dialog_token)
{
char fname[256];
int png;
FILE *f;
u16 data_len;
struct icon_entry *icon;
dl_list_for_each(icon, &wpa_s->icon_head, struct icon_entry, list) {
if (icon->dialog_token == dialog_token && !icon->image &&
os_memcmp(icon->bssid, sa, ETH_ALEN) == 0) {
icon->image = os_malloc(slen);
if (!icon->image)
return -1;
os_memcpy(icon->image, pos, slen);
icon->image_len = slen;
hs20_remove_duplicate_icons(wpa_s, icon);
wpa_msg(wpa_s, MSG_INFO,
"RX-HS20-ICON " MACSTR " %s %u",
MAC2STR(sa), icon->file_name,
(unsigned int) icon->image_len);
return 0;
}
}
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR " Icon Binary File",
MAC2STR(sa));
if (slen < 4) {
wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
"value from " MACSTR, MAC2STR(sa));
return -1;
}
wpa_printf(MSG_DEBUG, "HS 2.0: Download Status Code %u", *pos);
if (*pos != 0)
return -1;
pos++;
slen--;
if ((size_t) 1 + pos[0] > slen) {
wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
"value from " MACSTR, MAC2STR(sa));
return -1;
}
wpa_hexdump_ascii(MSG_DEBUG, "Icon Type", pos + 1, pos[0]);
png = os_strncasecmp((char *) pos + 1, "image/png", 9) == 0;
slen -= 1 + pos[0];
pos += 1 + pos[0];
if (slen < 2) {
wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
"value from " MACSTR, MAC2STR(sa));
return -1;
}
data_len = WPA_GET_LE16(pos);
pos += 2;
slen -= 2;
if (data_len > slen) {
wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
"value from " MACSTR, MAC2STR(sa));
return -1;
}
wpa_printf(MSG_DEBUG, "Icon Binary Data: %u bytes", data_len);
if (wpa_s->conf->osu_dir == NULL)
return -1;
wpa_s->osu_icon_id++;
if (wpa_s->osu_icon_id == 0)
wpa_s->osu_icon_id++;
snprintf(fname, sizeof(fname), "%s/osu-icon-%u.%s",
wpa_s->conf->osu_dir, wpa_s->osu_icon_id,
png ? "png" : "icon");
f = fopen(fname, "wb");
if (f == NULL)
return -1;
hs20_set_osu_access_permission(wpa_s->conf->osu_dir, fname);
if (fwrite(pos, slen, 1, f) != 1) {
fclose(f);
unlink(fname);
return -1;
}
fclose(f);
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP-ICON %s", fname);
return 0;
}
static void hs20_continue_icon_fetch(void *eloop_ctx, void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->fetch_osu_icon_in_progress)
hs20_next_osu_icon(wpa_s);
}
static void hs20_osu_icon_fetch_result(struct wpa_supplicant *wpa_s, int res)
{
size_t i, j;
struct os_reltime now, tmp;
int dur;
os_get_reltime(&now);
os_reltime_sub(&now, &wpa_s->osu_icon_fetch_start, &tmp);
dur = tmp.sec * 1000 + tmp.usec / 1000;
wpa_printf(MSG_DEBUG, "HS 2.0: Icon fetch dur=%d ms res=%d",
dur, res);
for (i = 0; i < wpa_s->osu_prov_count; i++) {
struct osu_provider *osu = &wpa_s->osu_prov[i];
for (j = 0; j < osu->icon_count; j++) {
struct osu_icon *icon = &osu->icon[j];
if (icon->id || icon->failed)
continue;
if (res < 0)
icon->failed = 1;
else
icon->id = wpa_s->osu_icon_id;
return;
}
}
}
void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss, const u8 *sa,
const u8 *data, size_t slen, u8 dialog_token)
{
const u8 *pos = data;
u8 subtype;
struct wpa_bss_anqp *anqp = NULL;
int ret;
if (slen < 2)
return;
if (bss)
anqp = bss->anqp;
subtype = *pos++;
slen--;
pos++; /* Reserved */
slen--;
switch (subtype) {
case HS20_STYPE_CAPABILITY_LIST:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" HS Capability List", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_capability_list);
anqp->hs20_capability_list =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" Operator Friendly Name", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_operator_friendly_name);
anqp->hs20_operator_friendly_name =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_WAN_METRICS:
wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
if (slen < 13) {
wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
"Metrics value from " MACSTR, MAC2STR(sa));
break;
}
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
pos[9], pos[10], WPA_GET_LE16(pos + 11));
if (anqp) {
wpabuf_free(anqp->hs20_wan_metrics);
anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_CONNECTION_CAPABILITY:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" Connection Capability", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_connection_capability);
anqp->hs20_connection_capability =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_OPERATING_CLASS:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" Operating Class", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_operating_class);
anqp->hs20_operating_class =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_OSU_PROVIDERS_LIST:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" OSU Providers list", MAC2STR(sa));
wpa_s->num_prov_found++;
if (anqp) {
wpabuf_free(anqp->hs20_osu_providers_list);
anqp->hs20_osu_providers_list =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_ICON_BINARY_FILE:
ret = hs20_process_icon_binary_file(wpa_s, sa, pos, slen,
dialog_token);
if (wpa_s->fetch_osu_icon_in_progress) {
hs20_osu_icon_fetch_result(wpa_s, ret);
eloop_cancel_timeout(hs20_continue_icon_fetch,
wpa_s, NULL);
eloop_register_timeout(0, 0, hs20_continue_icon_fetch,
wpa_s, NULL);
}
break;
default:
wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
break;
}
}
void hs20_notify_parse_done(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->fetch_osu_icon_in_progress)
return;
if (eloop_is_timeout_registered(hs20_continue_icon_fetch, wpa_s, NULL))
return;
/*
* We are going through icon fetch, but no icon response was received.
* Assume this means the current AP could not provide an answer to avoid
* getting stuck in fetch iteration.
*/
hs20_icon_fetch_failed(wpa_s);
}
static void hs20_free_osu_prov_entry(struct osu_provider *prov)
{
}
void hs20_free_osu_prov(struct wpa_supplicant *wpa_s)
{
size_t i;
for (i = 0; i < wpa_s->osu_prov_count; i++)
hs20_free_osu_prov_entry(&wpa_s->osu_prov[i]);
os_free(wpa_s->osu_prov);
wpa_s->osu_prov = NULL;
wpa_s->osu_prov_count = 0;
}
static void hs20_osu_fetch_done(struct wpa_supplicant *wpa_s)
{
char fname[256];
FILE *f;
size_t i, j;
wpa_s->fetch_osu_info = 0;
wpa_s->fetch_osu_icon_in_progress = 0;
if (wpa_s->conf->osu_dir == NULL) {
hs20_free_osu_prov(wpa_s);
wpa_s->fetch_anqp_in_progress = 0;
return;
}
snprintf(fname, sizeof(fname), "%s/osu-providers.txt",
wpa_s->conf->osu_dir);
f = fopen(fname, "w");
if (f == NULL) {
hs20_free_osu_prov(wpa_s);
return;
}
hs20_set_osu_access_permission(wpa_s->conf->osu_dir, fname);
for (i = 0; i < wpa_s->osu_prov_count; i++) {
struct osu_provider *osu = &wpa_s->osu_prov[i];
if (i > 0)
fprintf(f, "\n");
fprintf(f, "OSU-PROVIDER " MACSTR "\n"
"uri=%s\n"
"methods=%08x\n",
MAC2STR(osu->bssid), osu->server_uri, osu->osu_methods);
if (osu->osu_ssid_len) {
fprintf(f, "osu_ssid=%s\n",
wpa_ssid_txt(osu->osu_ssid,
osu->osu_ssid_len));
}
if (osu->osu_nai[0])
fprintf(f, "osu_nai=%s\n", osu->osu_nai);
for (j = 0; j < osu->friendly_name_count; j++) {
fprintf(f, "friendly_name=%s:%s\n",
osu->friendly_name[j].lang,
osu->friendly_name[j].text);
}
for (j = 0; j < osu->serv_desc_count; j++) {
fprintf(f, "desc=%s:%s\n",
osu->serv_desc[j].lang,
osu->serv_desc[j].text);
}
for (j = 0; j < osu->icon_count; j++) {
struct osu_icon *icon = &osu->icon[j];
if (icon->failed)
continue; /* could not fetch icon */
fprintf(f, "icon=%u:%u:%u:%s:%s:%s\n",
icon->id, icon->width, icon->height, icon->lang,
icon->icon_type, icon->filename);
}
}
fclose(f);
hs20_free_osu_prov(wpa_s);
wpa_msg(wpa_s, MSG_INFO, "OSU provider fetch completed");
wpa_s->fetch_anqp_in_progress = 0;
}
void hs20_next_osu_icon(struct wpa_supplicant *wpa_s)
{
size_t i, j;
wpa_printf(MSG_DEBUG, "HS 2.0: Ready to fetch next icon");
for (i = 0; i < wpa_s->osu_prov_count; i++) {
struct osu_provider *osu = &wpa_s->osu_prov[i];
for (j = 0; j < osu->icon_count; j++) {
struct osu_icon *icon = &osu->icon[j];
if (icon->id || icon->failed)
continue;
wpa_printf(MSG_DEBUG, "HS 2.0: Try to fetch icon '%s' "
"from " MACSTR, icon->filename,
MAC2STR(osu->bssid));
os_get_reltime(&wpa_s->osu_icon_fetch_start);
if (hs20_anqp_send_req(wpa_s, osu->bssid,
BIT(HS20_STYPE_ICON_REQUEST),
(u8 *) icon->filename,
os_strlen(icon->filename),
0) < 0) {
icon->failed = 1;
continue;
}
return;
}
}
wpa_printf(MSG_DEBUG, "HS 2.0: No more icons to fetch");
hs20_osu_fetch_done(wpa_s);
}
static void hs20_osu_add_prov(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
const u8 *osu_ssid, u8 osu_ssid_len,
const u8 *pos, size_t len)
{
struct osu_provider *prov;
const u8 *end = pos + len;
u16 len2;
const u8 *pos2;
u8 uri_len, osu_method_len, osu_nai_len;
wpa_hexdump(MSG_DEBUG, "HS 2.0: Parsing OSU Provider", pos, len);
prov = os_realloc_array(wpa_s->osu_prov,
wpa_s->osu_prov_count + 1,
sizeof(*prov));
if (prov == NULL)
return;
wpa_s->osu_prov = prov;
prov = &prov[wpa_s->osu_prov_count];
os_memset(prov, 0, sizeof(*prov));
os_memcpy(prov->bssid, bss->bssid, ETH_ALEN);
os_memcpy(prov->osu_ssid, osu_ssid, osu_ssid_len);
prov->osu_ssid_len = osu_ssid_len;
/* OSU Friendly Name Length */
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
"Friendly Name Length");
return;
}
len2 = WPA_GET_LE16(pos);
pos += 2;
if (len2 > end - pos) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
"Friendly Name Duples");
return;
}
pos2 = pos;
pos += len2;
/* OSU Friendly Name Duples */
while (pos - pos2 >= 4 && prov->friendly_name_count < OSU_MAX_ITEMS) {
struct osu_lang_string *f;
if (1 + pos2[0] > pos - pos2 || pos2[0] < 3) {
wpa_printf(MSG_DEBUG, "Invalid OSU Friendly Name");
break;
}
f = &prov->friendly_name[prov->friendly_name_count++];
os_memcpy(f->lang, pos2 + 1, 3);
os_memcpy(f->text, pos2 + 1 + 3, pos2[0] - 3);
pos2 += 1 + pos2[0];
}
/* OSU Server URI */
if (end - pos < 1) {
wpa_printf(MSG_DEBUG,
"HS 2.0: Not enough room for OSU Server URI length");
return;
}
uri_len = *pos++;
if (uri_len > end - pos) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Server "
"URI");
return;
}
os_memcpy(prov->server_uri, pos, uri_len);
pos += uri_len;
/* OSU Method list */
if (end - pos < 1) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Method "
"list length");
return;
}
osu_method_len = pos[0];
if (osu_method_len > end - pos - 1) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Method "
"list");
return;
}
pos2 = pos + 1;
pos += 1 + osu_method_len;
while (pos2 < pos) {
if (*pos2 < 32)
prov->osu_methods |= BIT(*pos2);
pos2++;
}
/* Icons Available Length */
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for Icons "
"Available Length");
return;
}
len2 = WPA_GET_LE16(pos);
pos += 2;
if (len2 > end - pos) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for Icons "
"Available");
return;
}
pos2 = pos;
pos += len2;
/* Icons Available */
while (pos2 < pos) {
struct osu_icon *icon = &prov->icon[prov->icon_count];
u8 flen;
if (2 + 2 + 3 + 1 + 1 > pos - pos2) {
wpa_printf(MSG_DEBUG, "HS 2.0: Invalid Icon Metadata");
break;
}
icon->width = WPA_GET_LE16(pos2);
pos2 += 2;
icon->height = WPA_GET_LE16(pos2);
pos2 += 2;
os_memcpy(icon->lang, pos2, 3);
pos2 += 3;
flen = *pos2++;
if (flen > pos - pos2) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon Type");
break;
}
os_memcpy(icon->icon_type, pos2, flen);
pos2 += flen;
if (pos - pos2 < 1) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon "
"Filename length");
break;
}
flen = *pos2++;
if (flen > pos - pos2) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon "
"Filename");
break;
}
os_memcpy(icon->filename, pos2, flen);
pos2 += flen;
prov->icon_count++;
}
/* OSU_NAI */
if (end - pos < 1) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU_NAI");
return;
}
osu_nai_len = *pos++;
if (osu_nai_len > end - pos) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU_NAI");
return;
}
os_memcpy(prov->osu_nai, pos, osu_nai_len);
pos += osu_nai_len;
/* OSU Service Description Length */
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
"Service Description Length");
return;
}
len2 = WPA_GET_LE16(pos);
pos += 2;
if (len2 > end - pos) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
"Service Description Duples");
return;
}
pos2 = pos;
pos += len2;
/* OSU Service Description Duples */
while (pos - pos2 >= 4 && prov->serv_desc_count < OSU_MAX_ITEMS) {
struct osu_lang_string *f;
u8 descr_len;
descr_len = *pos2++;
if (descr_len > pos - pos2 || descr_len < 3) {
wpa_printf(MSG_DEBUG, "Invalid OSU Service "
"Description");
break;
}
f = &prov->serv_desc[prov->serv_desc_count++];
os_memcpy(f->lang, pos2, 3);
os_memcpy(f->text, pos2 + 3, descr_len - 3);
pos2 += descr_len;
}
wpa_printf(MSG_DEBUG, "HS 2.0: Added OSU Provider through " MACSTR,
MAC2STR(bss->bssid));
wpa_s->osu_prov_count++;
}
void hs20_osu_icon_fetch(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
struct wpabuf *prov_anqp;
const u8 *pos, *end;
u16 len;
const u8 *osu_ssid;
u8 osu_ssid_len;
u8 num_providers;
hs20_free_osu_prov(wpa_s);
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (bss->anqp == NULL)
continue;
prov_anqp = bss->anqp->hs20_osu_providers_list;
if (prov_anqp == NULL)
continue;
wpa_printf(MSG_DEBUG, "HS 2.0: Parsing OSU Providers list from "
MACSTR, MAC2STR(bss->bssid));
wpa_hexdump_buf(MSG_DEBUG, "HS 2.0: OSU Providers list",
prov_anqp);
pos = wpabuf_head(prov_anqp);
end = pos + wpabuf_len(prov_anqp);
/* OSU SSID */
if (end - pos < 1)
continue;
if (1 + pos[0] > end - pos) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for "
"OSU SSID");
continue;
}
osu_ssid_len = *pos++;
if (osu_ssid_len > SSID_MAX_LEN) {
wpa_printf(MSG_DEBUG, "HS 2.0: Invalid OSU SSID "
"Length %u", osu_ssid_len);
continue;
}
osu_ssid = pos;
pos += osu_ssid_len;
if (end - pos < 1) {
wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for "
"Number of OSU Providers");
continue;
}
num_providers = *pos++;
wpa_printf(MSG_DEBUG, "HS 2.0: Number of OSU Providers: %u",
num_providers);
/* OSU Providers */
while (end - pos > 2 && num_providers > 0) {
num_providers--;
len = WPA_GET_LE16(pos);
pos += 2;
if (len > (unsigned int) (end - pos))
break;
hs20_osu_add_prov(wpa_s, bss, osu_ssid,
osu_ssid_len, pos, len);
pos += len;
}
if (pos != end) {
wpa_printf(MSG_DEBUG, "HS 2.0: Ignored %d bytes of "
"extra data after OSU Providers",
(int) (end - pos));
}
}
wpa_s->fetch_osu_icon_in_progress = 1;
hs20_next_osu_icon(wpa_s);
}
static void hs20_osu_scan_res_handler(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
wpa_printf(MSG_DEBUG, "OSU provisioning fetch scan completed");
if (!wpa_s->fetch_osu_waiting_scan) {
wpa_printf(MSG_DEBUG, "OSU fetch have been canceled");
return;
}
wpa_s->network_select = 0;
wpa_s->fetch_all_anqp = 1;
wpa_s->fetch_osu_info = 1;
wpa_s->fetch_osu_icon_in_progress = 0;
interworking_start_fetch_anqp(wpa_s);
}
int hs20_fetch_osu(struct wpa_supplicant *wpa_s)
{
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
"interface disabled");
return -1;
}
if (wpa_s->scanning) {
wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
"scanning");
return -1;
}
if (wpa_s->conf->osu_dir == NULL) {
wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
"osu_dir not configured");
return -1;
}
if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) {
wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
"fetch in progress (%d, %d)",
wpa_s->fetch_anqp_in_progress,
wpa_s->network_select);
return -1;
}
wpa_msg(wpa_s, MSG_INFO, "Starting OSU provisioning information fetch");
wpa_s->num_osu_scans = 0;
wpa_s->num_prov_found = 0;
hs20_start_osu_scan(wpa_s);
return 0;
}
void hs20_start_osu_scan(struct wpa_supplicant *wpa_s)
{
wpa_s->fetch_osu_waiting_scan = 1;
wpa_s->num_osu_scans++;
wpa_s->scan_req = MANUAL_SCAN_REQ;
wpa_s->scan_res_handler = hs20_osu_scan_res_handler;
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
void hs20_cancel_fetch_osu(struct wpa_supplicant *wpa_s)
{
wpa_printf(MSG_DEBUG, "Cancel OSU fetch");
interworking_stop_fetch_anqp(wpa_s);
wpa_s->fetch_osu_waiting_scan = 0;
wpa_s->network_select = 0;
wpa_s->fetch_osu_info = 0;
wpa_s->fetch_osu_icon_in_progress = 0;
}
void hs20_icon_fetch_failed(struct wpa_supplicant *wpa_s)
{
hs20_osu_icon_fetch_result(wpa_s, -1);
eloop_cancel_timeout(hs20_continue_icon_fetch, wpa_s, NULL);
eloop_register_timeout(0, 0, hs20_continue_icon_fetch, wpa_s, NULL);
}
void hs20_rx_subscription_remediation(struct wpa_supplicant *wpa_s,
const char *url, u8 osu_method)
{
if (url)
wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION "%u %s",
osu_method, url);
else
wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION);
}
void hs20_rx_deauth_imminent_notice(struct wpa_supplicant *wpa_s, u8 code,
u16 reauth_delay, const char *url)
{
if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
wpa_printf(MSG_DEBUG, "HS 2.0: Ignore deauthentication imminent notice since PMF was not enabled");
return;
}
wpa_msg(wpa_s, MSG_INFO, HS20_DEAUTH_IMMINENT_NOTICE "%u %u %s",
code, reauth_delay, url);
if (code == HS20_DEAUTH_REASON_CODE_BSS) {
wpa_printf(MSG_DEBUG, "HS 2.0: Add BSS to blacklist");
wpa_blacklist_add(wpa_s, wpa_s->bssid);
/* TODO: For now, disable full ESS since some drivers may not
* support disabling per BSS. */
if (wpa_s->current_ssid) {
struct os_reltime now;
os_get_reltime(&now);
if (now.sec + reauth_delay <=
wpa_s->current_ssid->disabled_until.sec)
return;
wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds (BSS)",
reauth_delay);
wpa_s->current_ssid->disabled_until.sec =
now.sec + reauth_delay;
}
}
if (code == HS20_DEAUTH_REASON_CODE_ESS && wpa_s->current_ssid) {
struct os_reltime now;
os_get_reltime(&now);
if (now.sec + reauth_delay <=
wpa_s->current_ssid->disabled_until.sec)
return;
wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds",
reauth_delay);
wpa_s->current_ssid->disabled_until.sec =
now.sec + reauth_delay;
}
}
void hs20_init(struct wpa_supplicant *wpa_s)
{
dl_list_init(&wpa_s->icon_head);
}
void hs20_deinit(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(hs20_continue_icon_fetch, wpa_s, NULL);
hs20_free_osu_prov(wpa_s);
if (wpa_s->icon_head.next)
hs20_del_icon(wpa_s, NULL, NULL);
}
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