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fragattacks/wpa_supplicant/interworking.c
Jouni Malinen 5a5aab7f40 Interworking: Remove unnecessary NULL check 
nai_realm_find_eap() is called only in cases where the cred pointer is
not NULL.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-01-24 19:37:42 +02:00

2976 lines
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/*
* Interworking (IEEE 802.11u)
* Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
* Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "common/ieee802_11_defs.h"
#include "common/gas.h"
#include "common/wpa_ctrl.h"
#include "utils/pcsc_funcs.h"
#include "utils/eloop.h"
#include "drivers/driver.h"
#include "eap_common/eap_defs.h"
#include "eap_peer/eap.h"
#include "eap_peer/eap_methods.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "wpa_supplicant_i.h"
#include "config.h"
#include "config_ssid.h"
#include "bss.h"
#include "scan.h"
#include "notify.h"
#include "driver_i.h"
#include "gas_query.h"
#include "hs20_supplicant.h"
#include "interworking.h"
#if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
#define INTERWORKING_3GPP
#else
#if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
#define INTERWORKING_3GPP
#else
#if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
#define INTERWORKING_3GPP
#endif
#endif
#endif
static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
static struct wpa_cred * interworking_credentials_available_realm(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
int *excluded);
static struct wpa_cred * interworking_credentials_available_3gpp(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
int *excluded);
static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b)
{
if (a->priority > b->priority)
return 1;
if (a->priority < b->priority)
return -1;
if (a->provisioning_sp == NULL || b->provisioning_sp == NULL ||
os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0)
return 0;
if (a->sp_priority < b->sp_priority)
return 1;
if (a->sp_priority > b->sp_priority)
return -1;
return 0;
}
static void interworking_reconnect(struct wpa_supplicant *wpa_s)
{
unsigned int tried;
if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
}
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
tried = wpa_s->interworking_fast_assoc_tried;
wpa_s->interworking_fast_assoc_tried = 1;
if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0)
return;
wpa_s->interworking_fast_assoc_tried = 0;
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
struct wpabuf *extra)
{
struct wpabuf *buf;
size_t i;
u8 *len_pos;
buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
(extra ? wpabuf_len(extra) : 0));
if (buf == NULL)
return NULL;
len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
for (i = 0; i < num_ids; i++)
wpabuf_put_le16(buf, info_ids[i]);
gas_anqp_set_element_len(buf, len_pos);
if (extra)
wpabuf_put_buf(buf, extra);
gas_anqp_set_len(buf);
return buf;
}
static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp,
u16 status_code)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR
" dialog_token=%u result=%d status_code=%u",
MAC2STR(dst), dialog_token, result, status_code);
anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
status_code);
interworking_next_anqp_fetch(wpa_s);
}
static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s)
{
struct wpa_cred *cred;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->roaming_consortium_len)
return 1;
if (cred->required_roaming_consortium_len)
return 1;
}
return 0;
}
static int cred_with_3gpp(struct wpa_supplicant *wpa_s)
{
struct wpa_cred *cred;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->pcsc || cred->imsi)
return 1;
}
return 0;
}
static int cred_with_nai_realm(struct wpa_supplicant *wpa_s)
{
struct wpa_cred *cred;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->pcsc || cred->imsi)
continue;
if (!cred->eap_method)
return 1;
if (cred->realm && cred->roaming_consortium_len == 0)
return 1;
}
return 0;
}
static int cred_with_domain(struct wpa_supplicant *wpa_s)
{
struct wpa_cred *cred;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->domain || cred->pcsc || cred->imsi ||
cred->roaming_partner)
return 1;
}
return 0;
}
#ifdef CONFIG_HS20
static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s)
{
struct wpa_cred *cred;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->min_dl_bandwidth_home ||
cred->min_ul_bandwidth_home ||
cred->min_dl_bandwidth_roaming ||
cred->min_ul_bandwidth_roaming)
return 1;
}
return 0;
}
static int cred_with_conn_capab(struct wpa_supplicant *wpa_s)
{
struct wpa_cred *cred;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->num_req_conn_capab)
return 1;
}
return 0;
}
#endif /* CONFIG_HS20 */
static int additional_roaming_consortiums(struct wpa_bss *bss)
{
const u8 *ie;
ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
if (ie == NULL || ie[1] == 0)
return 0;
return ie[2]; /* Number of ANQP OIs */
}
static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
interworking_next_anqp_fetch(wpa_s);
}
static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss)
{
struct wpabuf *buf;
int ret = 0;
int res;
u16 info_ids[8];
size_t num_info_ids = 0;
struct wpabuf *extra = NULL;
int all = wpa_s->fetch_all_anqp;
wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
MAC2STR(bss->bssid));
wpa_s->interworking_gas_bss = bss;
info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST;
if (all) {
info_ids[num_info_ids++] = ANQP_VENUE_NAME;
info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE;
}
if (all || (cred_with_roaming_consortium(wpa_s) &&
additional_roaming_consortiums(bss)))
info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM;
if (all)
info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY;
if (all || cred_with_nai_realm(wpa_s))
info_ids[num_info_ids++] = ANQP_NAI_REALM;
if (all || cred_with_3gpp(wpa_s)) {
info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK;
wpa_supplicant_scard_init(wpa_s, NULL);
}
if (all || cred_with_domain(wpa_s))
info_ids[num_info_ids++] = ANQP_DOMAIN_NAME;
wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info",
(u8 *) info_ids, num_info_ids * 2);
#ifdef CONFIG_HS20
if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) {
u8 *len_pos;
extra = wpabuf_alloc(100);
if (!extra)
return -1;
len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC);
wpabuf_put_be24(extra, OUI_WFA);
wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE);
wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST);
wpabuf_put_u8(extra, 0); /* Reserved */
wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST);
if (all)
wpabuf_put_u8(extra,
HS20_STYPE_OPERATOR_FRIENDLY_NAME);
if (all || cred_with_min_backhaul(wpa_s))
wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS);
if (all || cred_with_conn_capab(wpa_s))
wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY);
if (all)
wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS);
if (all)
wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST);
gas_anqp_set_element_len(extra, len_pos);
}
#endif /* CONFIG_HS20 */
buf = anqp_build_req(info_ids, num_info_ids, extra);
wpabuf_free(extra);
if (buf == NULL)
return -1;
res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
interworking_anqp_resp_cb, wpa_s);
if (res < 0) {
wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
wpabuf_free(buf);
ret = -1;
eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s,
NULL);
} else
wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
"%u", res);
return ret;
}
struct nai_realm_eap {
u8 method;
u8 inner_method;
enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
u8 cred_type;
u8 tunneled_cred_type;
};
struct nai_realm {
u8 encoding;
char *realm;
u8 eap_count;
struct nai_realm_eap *eap;
};
static void nai_realm_free(struct nai_realm *realms, u16 count)
{
u16 i;
if (realms == NULL)
return;
for (i = 0; i < count; i++) {
os_free(realms[i].eap);
os_free(realms[i].realm);
}
os_free(realms);
}
static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
const u8 *end)
{
u8 elen, auth_count, a;
const u8 *e_end;
if (pos + 3 > end) {
wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
return NULL;
}
elen = *pos++;
if (pos + elen > end || elen < 2) {
wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
return NULL;
}
e_end = pos + elen;
e->method = *pos++;
auth_count = *pos++;
wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
elen, e->method, auth_count);
for (a = 0; a < auth_count; a++) {
u8 id, len;
if (pos + 2 > end || pos + 2 + pos[1] > end) {
wpa_printf(MSG_DEBUG, "No room for Authentication "
"Parameter subfield");
return NULL;
}
id = *pos++;
len = *pos++;
switch (id) {
case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
if (len < 1)
break;
e->inner_non_eap = *pos;
if (e->method != EAP_TYPE_TTLS)
break;
switch (*pos) {
case NAI_REALM_INNER_NON_EAP_PAP:
wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
break;
case NAI_REALM_INNER_NON_EAP_CHAP:
wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
break;
case NAI_REALM_INNER_NON_EAP_MSCHAP:
wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
break;
case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
break;
}
break;
case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
if (len < 1)
break;
e->inner_method = *pos;
wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
e->inner_method);
break;
case NAI_REALM_EAP_AUTH_CRED_TYPE:
if (len < 1)
break;
e->cred_type = *pos;
wpa_printf(MSG_DEBUG, "Credential Type: %u",
e->cred_type);
break;
case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
if (len < 1)
break;
e->tunneled_cred_type = *pos;
wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
"Type: %u", e->tunneled_cred_type);
break;
default:
wpa_printf(MSG_DEBUG, "Unsupported Authentication "
"Parameter: id=%u len=%u", id, len);
wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
"Value", pos, len);
break;
}
pos += len;
}
return e_end;
}
static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
const u8 *end)
{
u16 len;
const u8 *f_end;
u8 realm_len, e;
if (end - pos < 4) {
wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
"fixed fields");
return NULL;
}
len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
pos += 2;
if (pos + len > end || len < 3) {
wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
"(len=%u; left=%u)",
len, (unsigned int) (end - pos));
return NULL;
}
f_end = pos + len;
r->encoding = *pos++;
realm_len = *pos++;
if (pos + realm_len > f_end) {
wpa_printf(MSG_DEBUG, "No room for NAI Realm "
"(len=%u; left=%u)",
realm_len, (unsigned int) (f_end - pos));
return NULL;
}
wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
r->realm = dup_binstr(pos, realm_len);
if (r->realm == NULL)
return NULL;
pos += realm_len;
if (pos + 1 > f_end) {
wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
return NULL;
}
r->eap_count = *pos++;
wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
if (pos + r->eap_count * 3 > f_end) {
wpa_printf(MSG_DEBUG, "No room for EAP Methods");
return NULL;
}
r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap));
if (r->eap == NULL)
return NULL;
for (e = 0; e < r->eap_count; e++) {
pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
if (pos == NULL)
return NULL;
}
return f_end;
}
static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
{
struct nai_realm *realm;
const u8 *pos, *end;
u16 i, num;
size_t left;
if (anqp == NULL)
return NULL;
left = wpabuf_len(anqp);
if (left < 2)
return NULL;
pos = wpabuf_head_u8(anqp);
end = pos + left;
num = WPA_GET_LE16(pos);
wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
pos += 2;
left -= 2;
if (num > left / 5) {
wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
"enough data (%u octets) for that many realms",
num, (unsigned int) left);
return NULL;
}
realm = os_calloc(num, sizeof(struct nai_realm));
if (realm == NULL)
return NULL;
for (i = 0; i < num; i++) {
pos = nai_realm_parse_realm(&realm[i], pos, end);
if (pos == NULL) {
nai_realm_free(realm, num);
return NULL;
}
}
*count = num;
return realm;
}
static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
{
char *tmp, *pos, *end;
int match = 0;
if (realm->realm == NULL || home_realm == NULL)
return 0;
if (os_strchr(realm->realm, ';') == NULL)
return os_strcasecmp(realm->realm, home_realm) == 0;
tmp = os_strdup(realm->realm);
if (tmp == NULL)
return 0;
pos = tmp;
while (*pos) {
end = os_strchr(pos, ';');
if (end)
*end = '\0';
if (os_strcasecmp(pos, home_realm) == 0) {
match = 1;
break;
}
if (end == NULL)
break;
pos = end + 1;
}
os_free(tmp);
return match;
}
static int nai_realm_cred_username(struct nai_realm_eap *eap)
{
if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
return 0; /* method not supported */
if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP &&
eap->method != EAP_TYPE_FAST) {
/* Only tunneled methods with username/password supported */
return 0;
}
if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) {
if (eap->inner_method &&
eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
return 0;
if (!eap->inner_method &&
eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL)
return 0;
}
if (eap->method == EAP_TYPE_TTLS) {
if (eap->inner_method == 0 && eap->inner_non_eap == 0)
return 1; /* Assume TTLS/MSCHAPv2 is used */
if (eap->inner_method &&
eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
return 0;
if (eap->inner_non_eap &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
return 0;
}
if (eap->inner_method &&
eap->inner_method != EAP_TYPE_GTC &&
eap->inner_method != EAP_TYPE_MSCHAPV2)
return 0;
return 1;
}
static int nai_realm_cred_cert(struct nai_realm_eap *eap)
{
if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
return 0; /* method not supported */
if (eap->method != EAP_TYPE_TLS) {
/* Only EAP-TLS supported for credential authentication */
return 0;
}
return 1;
}
static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
struct nai_realm *realm)
{
u8 e;
if (cred->username == NULL ||
cred->username[0] == '\0' ||
((cred->password == NULL ||
cred->password[0] == '\0') &&
(cred->private_key == NULL ||
cred->private_key[0] == '\0')))
return NULL;
for (e = 0; e < realm->eap_count; e++) {
struct nai_realm_eap *eap = &realm->eap[e];
if (cred->password && cred->password[0] &&
nai_realm_cred_username(eap))
return eap;
if (cred->private_key && cred->private_key[0] &&
nai_realm_cred_cert(eap))
return eap;
}
return NULL;
}
#ifdef INTERWORKING_3GPP
static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len)
{
u8 plmn[3], plmn2[3];
const u8 *pos, *end;
u8 udhl;
/*
* See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network
* operator is allowed to include only two digits of the MNC, so allow
* matches based on both two and three digit MNC assumptions. Since some
* SIM/USIM cards may not expose MNC length conveniently, we may be
* provided the default MNC length 3 here and as such, checking with MNC
* length 2 is justifiable even though 3GPP TS 24.234 does not mention
* that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used
* with otherwise matching values would not be good idea in general, so
* this should not result in selecting incorrect networks.
*/
/* Match with 3 digit MNC */
plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4);
plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
/* Match with 2 digit MNC */
plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
plmn2[1] = (imsi[2] - '0') | 0xf0;
plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
if (anqp == NULL)
return 0;
pos = wpabuf_head_u8(anqp);
end = pos + wpabuf_len(anqp);
if (pos + 2 > end)
return 0;
if (*pos != 0) {
wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
return 0;
}
pos++;
udhl = *pos++;
if (pos + udhl > end) {
wpa_printf(MSG_DEBUG, "Invalid UDHL");
return 0;
}
end = pos + udhl;
wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)",
plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2],
imsi, mnc_len);
while (pos + 2 <= end) {
u8 iei, len;
const u8 *l_end;
iei = *pos++;
len = *pos++ & 0x7f;
if (pos + len > end)
break;
l_end = pos + len;
if (iei == 0 && len > 0) {
/* PLMN List */
u8 num, i;
wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element",
pos, len);
num = *pos++;
for (i = 0; i < num; i++) {
if (pos + 3 > l_end)
break;
if (os_memcmp(pos, plmn, 3) == 0 ||
os_memcmp(pos, plmn2, 3) == 0)
return 1; /* Found matching PLMN */
pos += 3;
}
} else {
wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element",
pos, len);
}
pos = l_end;
}
return 0;
}
static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
size_t mnc_len, char prefix)
{
const char *sep, *msin;
char *end, *pos;
size_t msin_len, plmn_len;
/*
* TS 23.003, Clause 14 (3GPP to WLAN Interworking)
* Root NAI:
* <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
* <MNC> is zero-padded to three digits in case two-digit MNC is used
*/
if (imsi == NULL || os_strlen(imsi) > 16) {
wpa_printf(MSG_DEBUG, "No valid IMSI available");
return -1;
}
sep = os_strchr(imsi, '-');
if (sep) {
plmn_len = sep - imsi;
msin = sep + 1;
} else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) {
plmn_len = 3 + mnc_len;
msin = imsi + plmn_len;
} else
return -1;
if (plmn_len != 5 && plmn_len != 6)
return -1;
msin_len = os_strlen(msin);
pos = nai;
end = nai + nai_len;
if (prefix)
*pos++ = prefix;
os_memcpy(pos, imsi, plmn_len);
pos += plmn_len;
os_memcpy(pos, msin, msin_len);
pos += msin_len;
pos += os_snprintf(pos, end - pos, "@wlan.mnc");
if (plmn_len == 5) {
*pos++ = '0';
*pos++ = imsi[3];
*pos++ = imsi[4];
} else {
*pos++ = imsi[3];
*pos++ = imsi[4];
*pos++ = imsi[5];
}
os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
imsi[0], imsi[1], imsi[2]);
return 0;
}
static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
{
char nai[100];
if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0)
return -1;
return wpa_config_set_quoted(ssid, "identity", nai);
}
#endif /* INTERWORKING_3GPP */
static int already_connected(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred, struct wpa_bss *bss)
{
struct wpa_ssid *ssid, *sel_ssid;
struct wpa_bss *selected;
if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL)
return 0;
ssid = wpa_s->current_ssid;
if (ssid->parent_cred != cred)
return 0;
if (ssid->ssid_len != bss->ssid_len ||
os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
return 0;
sel_ssid = NULL;
selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid);
if (selected && sel_ssid && sel_ssid->priority > ssid->priority)
return 0; /* higher priority network in scan results */
return 1;
}
static void remove_duplicate_network(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred,
struct wpa_bss *bss)
{
struct wpa_ssid *ssid;
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (ssid->parent_cred != cred)
continue;
if (ssid->ssid_len != bss->ssid_len ||
os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0)
continue;
break;
}
if (ssid == NULL)
return;
wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential");
if (ssid == wpa_s->current_ssid) {
wpa_sm_set_config(wpa_s->wpa, NULL);
eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
}
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
}
static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
const char *key_mgmt = NULL;
#ifdef CONFIG_IEEE80211R
int res;
struct wpa_driver_capa capa;
res = wpa_drv_get_capa(wpa_s, &capa);
if (res == 0 && capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_FT) {
key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
"WPA-EAP WPA-EAP-SHA256 FT-EAP" :
"WPA-EAP FT-EAP";
}
#endif /* CONFIG_IEEE80211R */
if (!key_mgmt)
key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ?
"WPA-EAP WPA-EAP-SHA256" : "WPA-EAP";
if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0)
return -1;
if (wpa_config_set(ssid, "proto", "RSN", 0) < 0)
return -1;
if (wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0)
return -1;
return 0;
}
static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred,
struct wpa_bss *bss)
{
#ifdef INTERWORKING_3GPP
struct wpa_ssid *ssid;
int eap_type;
int res;
char prefix;
if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
return -1;
wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
MAC2STR(bss->bssid));
if (already_connected(wpa_s, cred, bss)) {
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
MAC2STR(bss->bssid));
return 0;
}
remove_duplicate_network(wpa_s, cred, bss);
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
ssid->parent_cred = cred;
wpas_notify_network_added(wpa_s, ssid);
wpa_config_set_network_defaults(ssid);
ssid->priority = cred->priority;
ssid->temporary = 1;
ssid->ssid = os_zalloc(bss->ssid_len + 1);
if (ssid->ssid == NULL)
goto fail;
os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
ssid->ssid_len = bss->ssid_len;
ssid->eap.sim_num = cred->sim_num;
if (interworking_set_hs20_params(wpa_s, ssid) < 0)
goto fail;
eap_type = EAP_TYPE_SIM;
if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard))
eap_type = EAP_TYPE_AKA;
if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) {
if (cred->eap_method[0].method == EAP_TYPE_SIM ||
cred->eap_method[0].method == EAP_TYPE_AKA ||
cred->eap_method[0].method == EAP_TYPE_AKA_PRIME)
eap_type = cred->eap_method[0].method;
}
switch (eap_type) {
case EAP_TYPE_SIM:
prefix = '1';
res = wpa_config_set(ssid, "eap", "SIM", 0);
break;
case EAP_TYPE_AKA:
prefix = '0';
res = wpa_config_set(ssid, "eap", "AKA", 0);
break;
case EAP_TYPE_AKA_PRIME:
prefix = '6';
res = wpa_config_set(ssid, "eap", "AKA'", 0);
break;
default:
res = -1;
break;
}
if (res < 0) {
wpa_printf(MSG_DEBUG, "Selected EAP method (%d) not supported",
eap_type);
goto fail;
}
if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) {
wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
goto fail;
}
if (cred->milenage && cred->milenage[0]) {
if (wpa_config_set_quoted(ssid, "password",
cred->milenage) < 0)
goto fail;
} else if (cred->pcsc) {
if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
goto fail;
if (wpa_s->conf->pcsc_pin &&
wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin)
< 0)
goto fail;
}
wpa_s->next_ssid = ssid;
wpa_config_update_prio_list(wpa_s->conf);
interworking_reconnect(wpa_s);
return 0;
fail:
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
#endif /* INTERWORKING_3GPP */
return -1;
}
static int roaming_consortium_element_match(const u8 *ie, const u8 *rc_id,
size_t rc_len)
{
const u8 *pos, *end;
u8 lens;
if (ie == NULL)
return 0;
pos = ie + 2;
end = ie + 2 + ie[1];
/* Roaming Consortium element:
* Number of ANQP OIs
* OI #1 and #2 lengths
* OI #1, [OI #2], [OI #3]
*/
if (pos + 2 > end)
return 0;
pos++; /* skip Number of ANQP OIs */
lens = *pos++;
if (pos + (lens & 0x0f) + (lens >> 4) > end)
return 0;
if ((lens & 0x0f) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
return 1;
pos += lens & 0x0f;
if ((lens >> 4) == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
return 1;
pos += lens >> 4;
if (pos < end && (size_t) (end - pos) == rc_len &&
os_memcmp(pos, rc_id, rc_len) == 0)
return 1;
return 0;
}
static int roaming_consortium_anqp_match(const struct wpabuf *anqp,
const u8 *rc_id, size_t rc_len)
{
const u8 *pos, *end;
u8 len;
if (anqp == NULL)
return 0;
pos = wpabuf_head(anqp);
end = pos + wpabuf_len(anqp);
/* Set of <OI Length, OI> duples */
while (pos < end) {
len = *pos++;
if (pos + len > end)
break;
if (len == rc_len && os_memcmp(pos, rc_id, rc_len) == 0)
return 1;
pos += len;
}
return 0;
}
static int roaming_consortium_match(const u8 *ie, const struct wpabuf *anqp,
const u8 *rc_id, size_t rc_len)
{
return roaming_consortium_element_match(ie, rc_id, rc_len) ||
roaming_consortium_anqp_match(anqp, rc_id, rc_len);
}
static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss)
{
const u8 *ie;
if (cred->required_roaming_consortium_len == 0)
return 0;
ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
if (ie == NULL &&
(bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
return 1;
return !roaming_consortium_match(ie,
bss->anqp ?
bss->anqp->roaming_consortium : NULL,
cred->required_roaming_consortium,
cred->required_roaming_consortium_len);
}
static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss)
{
size_t i;
if (!cred->excluded_ssid)
return 0;
for (i = 0; i < cred->num_excluded_ssid; i++) {
struct excluded_ssid *e = &cred->excluded_ssid[i];
if (bss->ssid_len == e->ssid_len &&
os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0)
return 1;
}
return 0;
}
static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred, struct wpa_bss *bss)
{
int res;
unsigned int dl_bandwidth, ul_bandwidth;
const u8 *wan;
u8 wan_info, dl_load, ul_load;
u16 lmd;
u32 ul_speed, dl_speed;
if (!cred->min_dl_bandwidth_home &&
!cred->min_ul_bandwidth_home &&
!cred->min_dl_bandwidth_roaming &&
!cred->min_ul_bandwidth_roaming)
return 0; /* No bandwidth constraint specified */
if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL)
return 0; /* No WAN Metrics known - ignore constraint */
wan = wpabuf_head(bss->anqp->hs20_wan_metrics);
wan_info = wan[0];
if (wan_info & BIT(3))
return 1; /* WAN link at capacity */
lmd = WPA_GET_LE16(wan + 11);
if (lmd == 0)
return 0; /* Downlink/Uplink Load was not measured */
dl_speed = WPA_GET_LE32(wan + 1);
ul_speed = WPA_GET_LE32(wan + 5);
dl_load = wan[9];
ul_load = wan[10];
if (dl_speed >= 0xffffff)
dl_bandwidth = dl_speed / 255 * (255 - dl_load);
else
dl_bandwidth = dl_speed * (255 - dl_load) / 255;
if (ul_speed >= 0xffffff)
ul_bandwidth = ul_speed / 255 * (255 - ul_load);
else
ul_bandwidth = ul_speed * (255 - ul_load) / 255;
res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
bss->anqp->domain_name : NULL);
if (res > 0) {
if (cred->min_dl_bandwidth_home > dl_bandwidth)
return 1;
if (cred->min_ul_bandwidth_home > ul_bandwidth)
return 1;
} else {
if (cred->min_dl_bandwidth_roaming > dl_bandwidth)
return 1;
if (cred->min_ul_bandwidth_roaming > ul_bandwidth)
return 1;
}
return 0;
}
static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred, struct wpa_bss *bss)
{
const u8 *ie;
int res;
if (!cred->max_bss_load)
return 0; /* No BSS Load constraint specified */
ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD);
if (ie == NULL || ie[1] < 3)
return 0; /* No BSS Load advertised */
res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
bss->anqp->domain_name : NULL);
if (res <= 0)
return 0; /* Not a home network */
return ie[4] > cred->max_bss_load;
}
static int has_proto_match(const u8 *pos, const u8 *end, u8 proto)
{
while (pos + 4 <= end) {
if (pos[0] == proto && pos[3] == 1 /* Open */)
return 1;
pos += 4;
}
return 0;
}
static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto,
u16 port)
{
while (pos + 4 <= end) {
if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port &&
pos[3] == 1 /* Open */)
return 1;
pos += 4;
}
return 0;
}
static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred, struct wpa_bss *bss)
{
int res;
const u8 *capab, *end;
unsigned int i, j;
int *ports;
if (!cred->num_req_conn_capab)
return 0; /* No connection capability constraint specified */
if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL)
return 0; /* No Connection Capability known - ignore constraint
*/
res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ?
bss->anqp->domain_name : NULL);
if (res > 0)
return 0; /* No constraint in home network */
capab = wpabuf_head(bss->anqp->hs20_connection_capability);
end = capab + wpabuf_len(bss->anqp->hs20_connection_capability);
for (i = 0; i < cred->num_req_conn_capab; i++) {
ports = cred->req_conn_capab_port[i];
if (!ports) {
if (!has_proto_match(capab, end,
cred->req_conn_capab_proto[i]))
return 1;
} else {
for (j = 0; ports[j] > -1; j++) {
if (!has_proto_port_match(
capab, end,
cred->req_conn_capab_proto[i],
ports[j]))
return 1;
}
}
}
return 0;
}
static struct wpa_cred * interworking_credentials_available_roaming_consortium(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
int *excluded)
{
struct wpa_cred *cred, *selected = NULL;
const u8 *ie;
int is_excluded = 0;
ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM);
if (ie == NULL &&
(bss->anqp == NULL || bss->anqp->roaming_consortium == NULL))
return NULL;
if (wpa_s->conf->cred == NULL)
return NULL;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->roaming_consortium_len == 0)
continue;
if (!roaming_consortium_match(ie,
bss->anqp ?
bss->anqp->roaming_consortium :
NULL,
cred->roaming_consortium,
cred->roaming_consortium_len))
continue;
if (cred_no_required_oi_match(cred, bss))
continue;
if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss))
continue;
if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss))
continue;
if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss))
continue;
if (cred_excluded_ssid(cred, bss)) {
if (excluded == NULL)
continue;
if (selected == NULL) {
selected = cred;
is_excluded = 1;
}
} else {
if (selected == NULL || is_excluded ||
cred_prio_cmp(selected, cred) < 0) {
selected = cred;
is_excluded = 0;
}
}
}
if (excluded)
*excluded = is_excluded;
return selected;
}
static int interworking_set_eap_params(struct wpa_ssid *ssid,
struct wpa_cred *cred, int ttls)
{
if (cred->eap_method) {
ttls = cred->eap_method->vendor == EAP_VENDOR_IETF &&
cred->eap_method->method == EAP_TYPE_TTLS;
os_free(ssid->eap.eap_methods);
ssid->eap.eap_methods =
os_malloc(sizeof(struct eap_method_type) * 2);
if (ssid->eap.eap_methods == NULL)
return -1;
os_memcpy(ssid->eap.eap_methods, cred->eap_method,
sizeof(*cred->eap_method));
ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF;
ssid->eap.eap_methods[1].method = EAP_TYPE_NONE;
}
if (ttls && cred->username && cred->username[0]) {
const char *pos;
char *anon;
/* Use anonymous NAI in Phase 1 */
pos = os_strchr(cred->username, '@');
if (pos) {
size_t buflen = 9 + os_strlen(pos) + 1;
anon = os_malloc(buflen);
if (anon == NULL)
return -1;
os_snprintf(anon, buflen, "anonymous%s", pos);
} else if (cred->realm) {
size_t buflen = 10 + os_strlen(cred->realm) + 1;
anon = os_malloc(buflen);
if (anon == NULL)
return -1;
os_snprintf(anon, buflen, "anonymous@%s", cred->realm);
} else {
anon = os_strdup("anonymous");
if (anon == NULL)
return -1;
}
if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
0) {
os_free(anon);
return -1;
}
os_free(anon);
}
if (cred->username && cred->username[0] &&
wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
return -1;
if (cred->password && cred->password[0]) {
if (cred->ext_password &&
wpa_config_set(ssid, "password", cred->password, 0) < 0)
return -1;
if (!cred->ext_password &&
wpa_config_set_quoted(ssid, "password", cred->password) <
0)
return -1;
}
if (cred->client_cert && cred->client_cert[0] &&
wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
return -1;
#ifdef ANDROID
if (cred->private_key &&
os_strncmp(cred->private_key, "keystore://", 11) == 0) {
/* Use OpenSSL engine configuration for Android keystore */
if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 ||
wpa_config_set_quoted(ssid, "key_id",
cred->private_key + 11) < 0 ||
wpa_config_set(ssid, "engine", "1", 0) < 0)
return -1;
} else
#endif /* ANDROID */
if (cred->private_key && cred->private_key[0] &&
wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
return -1;
if (cred->private_key_passwd && cred->private_key_passwd[0] &&
wpa_config_set_quoted(ssid, "private_key_passwd",
cred->private_key_passwd) < 0)
return -1;
if (cred->phase1) {
os_free(ssid->eap.phase1);
ssid->eap.phase1 = os_strdup(cred->phase1);
}
if (cred->phase2) {
os_free(ssid->eap.phase2);
ssid->eap.phase2 = os_strdup(cred->phase2);
}
if (cred->ca_cert && cred->ca_cert[0] &&
wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
return -1;
if (cred->domain_suffix_match && cred->domain_suffix_match[0] &&
wpa_config_set_quoted(ssid, "domain_suffix_match",
cred->domain_suffix_match) < 0)
return -1;
ssid->eap.ocsp = cred->ocsp;
return 0;
}
static int interworking_connect_roaming_consortium(
struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
struct wpa_bss *bss)
{
struct wpa_ssid *ssid;
wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " based on "
"roaming consortium match", MAC2STR(bss->bssid));
if (already_connected(wpa_s, cred, bss)) {
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
MAC2STR(bss->bssid));
return 0;
}
remove_duplicate_network(wpa_s, cred, bss);
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
ssid->parent_cred = cred;
wpas_notify_network_added(wpa_s, ssid);
wpa_config_set_network_defaults(ssid);
ssid->priority = cred->priority;
ssid->temporary = 1;
ssid->ssid = os_zalloc(bss->ssid_len + 1);
if (ssid->ssid == NULL)
goto fail;
os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
ssid->ssid_len = bss->ssid_len;
if (interworking_set_hs20_params(wpa_s, ssid) < 0)
goto fail;
if (cred->eap_method == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: No EAP method set for "
"credential using roaming consortium");
goto fail;
}
if (interworking_set_eap_params(
ssid, cred,
cred->eap_method->vendor == EAP_VENDOR_IETF &&
cred->eap_method->method == EAP_TYPE_TTLS) < 0)
goto fail;
wpa_s->next_ssid = ssid;
wpa_config_update_prio_list(wpa_s->conf);
interworking_reconnect(wpa_s);
return 0;
fail:
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
return -1;
}
static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss, int allow_excluded)
{
struct wpa_cred *cred, *cred_rc, *cred_3gpp;
struct wpa_ssid *ssid;
struct nai_realm *realm;
struct nai_realm_eap *eap = NULL;
u16 count, i;
char buf[100];
int excluded = 0, *excl = allow_excluded ? &excluded : NULL;
const char *name;
if (wpa_s->conf->cred == NULL || bss == NULL)
return -1;
if (disallowed_bssid(wpa_s, bss->bssid) ||
disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
wpa_printf(MSG_DEBUG, "Interworking: Reject connection to disallowed BSS "
MACSTR, MAC2STR(bss->bssid));
return -1;
}
wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
" for connection (allow_excluded=%d)",
MAC2STR(bss->bssid), allow_excluded);
if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
/*
* We currently support only HS 2.0 networks and those are
* required to use WPA2-Enterprise.
*/
wpa_printf(MSG_DEBUG, "Interworking: Network does not use "
"RSN");
return -1;
}
cred_rc = interworking_credentials_available_roaming_consortium(
wpa_s, bss, 0, excl);
if (cred_rc) {
wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
"consortium matching credential priority %d "
"sp_priority %d",
cred_rc->priority, cred_rc->sp_priority);
if (allow_excluded && excl && !(*excl))
excl = NULL;
}
cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl);
if (cred) {
wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm list "
"matching credential priority %d sp_priority %d",
cred->priority, cred->sp_priority);
if (allow_excluded && excl && !(*excl))
excl = NULL;
}
cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0,
excl);
if (cred_3gpp) {
wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP matching "
"credential priority %d sp_priority %d",
cred_3gpp->priority, cred_3gpp->sp_priority);
if (allow_excluded && excl && !(*excl))
excl = NULL;
}
if (!cred_rc && !cred && !cred_3gpp) {
wpa_printf(MSG_DEBUG, "Interworking: No full credential matches - consider options without BW(etc.) limits");
cred_rc = interworking_credentials_available_roaming_consortium(
wpa_s, bss, 1, excl);
if (cred_rc) {
wpa_printf(MSG_DEBUG, "Interworking: Highest roaming "
"consortium matching credential priority %d "
"sp_priority %d (ignore BW)",
cred_rc->priority, cred_rc->sp_priority);
if (allow_excluded && excl && !(*excl))
excl = NULL;
}
cred = interworking_credentials_available_realm(wpa_s, bss, 1,
excl);
if (cred) {
wpa_printf(MSG_DEBUG, "Interworking: Highest NAI Realm "
"list matching credential priority %d "
"sp_priority %d (ignore BW)",
cred->priority, cred->sp_priority);
if (allow_excluded && excl && !(*excl))
excl = NULL;
}
cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss,
1, excl);
if (cred_3gpp) {
wpa_printf(MSG_DEBUG, "Interworking: Highest 3GPP "
"matching credential priority %d "
"sp_priority %d (ignore BW)",
cred_3gpp->priority, cred_3gpp->sp_priority);
if (allow_excluded && excl && !(*excl))
excl = NULL;
}
}
if (cred_rc &&
(cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) &&
(cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0))
return interworking_connect_roaming_consortium(wpa_s, cred_rc,
bss);
if (cred_3gpp &&
(cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) {
return interworking_connect_3gpp(wpa_s, cred_3gpp, bss);
}
if (cred == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
"found for " MACSTR, MAC2STR(bss->bssid));
return -1;
}
realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL,
&count);
if (realm == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
"Realm list from " MACSTR, MAC2STR(bss->bssid));
return -1;
}
for (i = 0; i < count; i++) {
if (!nai_realm_match(&realm[i], cred->realm))
continue;
eap = nai_realm_find_eap(cred, &realm[i]);
if (eap)
break;
}
if (!eap) {
wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
"and EAP method found for " MACSTR,
MAC2STR(bss->bssid));
nai_realm_free(realm, count);
return -1;
}
wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
MAC2STR(bss->bssid));
if (already_connected(wpa_s, cred, bss)) {
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR,
MAC2STR(bss->bssid));
nai_realm_free(realm, count);
return 0;
}
remove_duplicate_network(wpa_s, cred, bss);
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL) {
nai_realm_free(realm, count);
return -1;
}
ssid->parent_cred = cred;
wpas_notify_network_added(wpa_s, ssid);
wpa_config_set_network_defaults(ssid);
ssid->priority = cred->priority;
ssid->temporary = 1;
ssid->ssid = os_zalloc(bss->ssid_len + 1);
if (ssid->ssid == NULL)
goto fail;
os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
ssid->ssid_len = bss->ssid_len;
if (interworking_set_hs20_params(wpa_s, ssid) < 0)
goto fail;
if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
eap->method), 0) < 0)
goto fail;
switch (eap->method) {
case EAP_TYPE_TTLS:
if (eap->inner_method) {
os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
eap_get_name(EAP_VENDOR_IETF,
eap->inner_method));
if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
goto fail;
break;
}
switch (eap->inner_non_eap) {
case NAI_REALM_INNER_NON_EAP_PAP:
if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
0)
goto fail;
break;
case NAI_REALM_INNER_NON_EAP_CHAP:
if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
< 0)
goto fail;
break;
case NAI_REALM_INNER_NON_EAP_MSCHAP:
if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
0) < 0)
goto fail;
break;
case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
0) < 0)
goto fail;
break;
default:
/* EAP params were not set - assume TTLS/MSCHAPv2 */
if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
0) < 0)
goto fail;
break;
}
break;
case EAP_TYPE_PEAP:
case EAP_TYPE_FAST:
if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"",
0) < 0)
goto fail;
if (wpa_config_set(ssid, "pac_file",
"\"blob://pac_interworking\"", 0) < 0)
goto fail;
name = eap_get_name(EAP_VENDOR_IETF,
eap->inner_method ? eap->inner_method :
EAP_TYPE_MSCHAPV2);
if (name == NULL)
goto fail;
os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name);
if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
goto fail;
break;
case EAP_TYPE_TLS:
break;
}
if (interworking_set_eap_params(ssid, cred,
eap->method == EAP_TYPE_TTLS) < 0)
goto fail;
nai_realm_free(realm, count);
wpa_s->next_ssid = ssid;
wpa_config_update_prio_list(wpa_s->conf);
interworking_reconnect(wpa_s);
return 0;
fail:
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
nai_realm_free(realm, count);
return -1;
}
int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
return interworking_connect_helper(wpa_s, bss, 1);
}
#ifdef PCSC_FUNCS
static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s)
{
size_t len;
if (wpa_s->imsi[0] && wpa_s->mnc_len)
return 0;
len = sizeof(wpa_s->imsi) - 1;
if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) {
scard_deinit(wpa_s->scard);
wpa_s->scard = NULL;
wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI");
return -1;
}
wpa_s->imsi[len] = '\0';
wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard);
wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)",
wpa_s->imsi, wpa_s->mnc_len);
return 0;
}
#endif /* PCSC_FUNCS */
static struct wpa_cred * interworking_credentials_available_3gpp(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
int *excluded)
{
struct wpa_cred *selected = NULL;
#ifdef INTERWORKING_3GPP
struct wpa_cred *cred;
int ret;
int is_excluded = 0;
if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL)
return NULL;
#ifdef CONFIG_EAP_PROXY
if (!wpa_s->imsi[0]) {
size_t len;
wpa_printf(MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy");
wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol,
wpa_s->imsi,
&len);
if (wpa_s->mnc_len > 0) {
wpa_s->imsi[len] = '\0';
wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)",
wpa_s->imsi, wpa_s->mnc_len);
} else {
wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available");
}
}
#endif /* CONFIG_EAP_PROXY */
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
char *sep;
const char *imsi;
int mnc_len;
char imsi_buf[16];
size_t msin_len;
#ifdef PCSC_FUNCS
if (cred->pcsc && wpa_s->scard) {
if (interworking_pcsc_read_imsi(wpa_s) < 0)
continue;
imsi = wpa_s->imsi;
mnc_len = wpa_s->mnc_len;
goto compare;
}
#endif /* PCSC_FUNCS */
#ifdef CONFIG_EAP_PROXY
if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
imsi = wpa_s->imsi;
mnc_len = wpa_s->mnc_len;
goto compare;
}
#endif /* CONFIG_EAP_PROXY */
if (cred->imsi == NULL || !cred->imsi[0] ||
(!wpa_s->conf->external_sim &&
(cred->milenage == NULL || !cred->milenage[0])))
continue;
sep = os_strchr(cred->imsi, '-');
if (sep == NULL ||
(sep - cred->imsi != 5 && sep - cred->imsi != 6))
continue;
mnc_len = sep - cred->imsi - 3;
os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len);
sep++;
msin_len = os_strlen(cred->imsi);
if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1)
msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1;
os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len);
imsi_buf[3 + mnc_len + msin_len] = '\0';
imsi = imsi_buf;
#if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
compare:
#endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
MACSTR, MAC2STR(bss->bssid));
ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);
wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
if (ret) {
if (cred_no_required_oi_match(cred, bss))
continue;
if (!ignore_bw &&
cred_below_min_backhaul(wpa_s, cred, bss))
continue;
if (!ignore_bw &&
cred_over_max_bss_load(wpa_s, cred, bss))
continue;
if (!ignore_bw &&
cred_conn_capab_missing(wpa_s, cred, bss))
continue;
if (cred_excluded_ssid(cred, bss)) {
if (excluded == NULL)
continue;
if (selected == NULL) {
selected = cred;
is_excluded = 1;
}
} else {
if (selected == NULL || is_excluded ||
cred_prio_cmp(selected, cred) < 0) {
selected = cred;
is_excluded = 0;
}
}
}
}
if (excluded)
*excluded = is_excluded;
#endif /* INTERWORKING_3GPP */
return selected;
}
static struct wpa_cred * interworking_credentials_available_realm(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
int *excluded)
{
struct wpa_cred *cred, *selected = NULL;
struct nai_realm *realm;
u16 count, i;
int is_excluded = 0;
if (bss->anqp == NULL || bss->anqp->nai_realm == NULL)
return NULL;
if (wpa_s->conf->cred == NULL)
return NULL;
wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
MACSTR, MAC2STR(bss->bssid));
realm = nai_realm_parse(bss->anqp->nai_realm, &count);
if (realm == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
"Realm list from " MACSTR, MAC2STR(bss->bssid));
return NULL;
}
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->realm == NULL)
continue;
for (i = 0; i < count; i++) {
if (!nai_realm_match(&realm[i], cred->realm))
continue;
if (nai_realm_find_eap(cred, &realm[i])) {
if (cred_no_required_oi_match(cred, bss))
continue;
if (!ignore_bw &&
cred_below_min_backhaul(wpa_s, cred, bss))
continue;
if (!ignore_bw &&
cred_over_max_bss_load(wpa_s, cred, bss))
continue;
if (!ignore_bw &&
cred_conn_capab_missing(wpa_s, cred, bss))
continue;
if (cred_excluded_ssid(cred, bss)) {
if (excluded == NULL)
continue;
if (selected == NULL) {
selected = cred;
is_excluded = 1;
}
} else {
if (selected == NULL || is_excluded ||
cred_prio_cmp(selected, cred) < 0)
{
selected = cred;
is_excluded = 0;
}
}
break;
}
}
}
nai_realm_free(realm, count);
if (excluded)
*excluded = is_excluded;
return selected;
}
static struct wpa_cred * interworking_credentials_available_helper(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw,
int *excluded)
{
struct wpa_cred *cred, *cred2;
int excluded1, excluded2;
if (disallowed_bssid(wpa_s, bss->bssid) ||
disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS "
MACSTR, MAC2STR(bss->bssid));
return NULL;
}
cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw,
&excluded1);
cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw,
&excluded2);
if (cred && cred2 &&
(cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
cred = cred2;
excluded1 = excluded2;
}
if (!cred) {
cred = cred2;
excluded1 = excluded2;
}
cred2 = interworking_credentials_available_roaming_consortium(
wpa_s, bss, ignore_bw, &excluded2);
if (cred && cred2 &&
(cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) {
cred = cred2;
excluded1 = excluded2;
}
if (!cred) {
cred = cred2;
excluded1 = excluded2;
}
if (excluded)
*excluded = excluded1;
return cred;
}
static struct wpa_cred * interworking_credentials_available(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded)
{
struct wpa_cred *cred;
if (excluded)
*excluded = 0;
cred = interworking_credentials_available_helper(wpa_s, bss, 0,
excluded);
if (cred)
return cred;
return interworking_credentials_available_helper(wpa_s, bss, 1,
excluded);
}
int domain_name_list_contains(struct wpabuf *domain_names,
const char *domain, int exact_match)
{
const u8 *pos, *end;
size_t len;
len = os_strlen(domain);
pos = wpabuf_head(domain_names);
end = pos + wpabuf_len(domain_names);
while (pos + 1 < end) {
if (pos + 1 + pos[0] > end)
break;
wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
pos + 1, pos[0]);
if (pos[0] == len &&
os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
return 1;
if (!exact_match && pos[0] > len && pos[pos[0] - len] == '.') {
const char *ap = (const char *) (pos + 1);
int offset = pos[0] - len;
if (os_strncasecmp(domain, ap + offset, len) == 0)
return 1;
}
pos += 1 + pos[0];
}
return 0;
}
int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
struct wpa_cred *cred,
struct wpabuf *domain_names)
{
size_t i;
int ret = -1;
#ifdef INTERWORKING_3GPP
char nai[100], *realm;
char *imsi = NULL;
int mnc_len = 0;
if (cred->imsi)
imsi = cred->imsi;
#ifdef PCSC_FUNCS
else if (cred->pcsc && wpa_s->scard) {
if (interworking_pcsc_read_imsi(wpa_s) < 0)
return -1;
imsi = wpa_s->imsi;
mnc_len = wpa_s->mnc_len;
}
#endif /* PCSC_FUNCS */
#ifdef CONFIG_EAP_PROXY
else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
imsi = wpa_s->imsi;
mnc_len = wpa_s->mnc_len;
}
#endif /* CONFIG_EAP_PROXY */
if (domain_names &&
imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) {
realm = os_strchr(nai, '@');
if (realm)
realm++;
wpa_printf(MSG_DEBUG, "Interworking: Search for match "
"with SIM/USIM domain %s", realm);
if (realm &&
domain_name_list_contains(domain_names, realm, 1))
return 1;
if (realm)
ret = 0;
}
#endif /* INTERWORKING_3GPP */
if (domain_names == NULL || cred->domain == NULL)
return ret;
for (i = 0; i < cred->num_domain; i++) {
wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
"home SP FQDN %s", cred->domain[i]);
if (domain_name_list_contains(domain_names, cred->domain[i], 1))
return 1;
}
return 0;
}
static int interworking_home_sp(struct wpa_supplicant *wpa_s,
struct wpabuf *domain_names)
{
struct wpa_cred *cred;
if (domain_names == NULL || wpa_s->conf->cred == NULL)
return -1;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
int res = interworking_home_sp_cred(wpa_s, cred, domain_names);
if (res)
return res;
}
return 0;
}
static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
struct wpa_ssid *ssid;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (wpas_network_disabled(wpa_s, ssid) ||
ssid->mode != WPAS_MODE_INFRA)
continue;
if (ssid->ssid_len != bss->ssid_len ||
os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
0)
continue;
/*
* TODO: Consider more accurate matching of security
* configuration similarly to what is done in events.c
*/
return 1;
}
}
return 0;
}
static int roaming_partner_match(struct wpa_supplicant *wpa_s,
struct roaming_partner *partner,
struct wpabuf *domain_names)
{
wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'",
partner->fqdn, partner->exact_match, partner->priority,
partner->country);
wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names",
wpabuf_head(domain_names),
wpabuf_len(domain_names));
if (!domain_name_list_contains(domain_names, partner->fqdn,
partner->exact_match))
return 0;
/* TODO: match Country */
return 1;
}
static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred,
struct wpa_bss *bss)
{
size_t i;
if (bss->anqp == NULL || bss->anqp->domain_name == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128");
return 128; /* cannot check preference with domain name */
}
if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0)
{
wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority");
return 0; /* max preference for home SP network */
}
for (i = 0; i < cred->num_roaming_partner; i++) {
if (roaming_partner_match(wpa_s, &cred->roaming_partner[i],
bss->anqp->domain_name)) {
wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u",
cred->roaming_partner[i].priority);
return cred->roaming_partner[i].priority;
}
}
wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128");
return 128;
}
static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected,
struct wpa_cred *cred)
{
struct wpa_bss *bss;
u8 best_prio, prio;
struct wpa_cred *cred2;
/*
* Check if any other BSS is operated by a more preferred roaming
* partner.
*/
best_prio = roaming_prio(wpa_s, cred, selected);
wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS "
MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid),
cred->id);
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (bss == selected)
continue;
cred2 = interworking_credentials_available(wpa_s, bss, NULL);
if (!cred2)
continue;
if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
continue;
prio = roaming_prio(wpa_s, cred2, bss);
wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS "
MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid),
cred2->id);
if (prio < best_prio) {
int bh1, bh2, load1, load2, conn1, conn2;
bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
load1 = cred_over_max_bss_load(wpa_s, cred, selected);
conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d",
bh1, load1, conn1, bh2, load2, conn2);
if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
best_prio = prio;
selected = bss;
}
}
}
return selected;
}
static void interworking_select_network(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
unsigned int count = 0;
const char *type;
int res;
struct wpa_cred *cred, *selected_cred = NULL;
struct wpa_cred *selected_home_cred = NULL;
struct wpa_cred *selected2_cred = NULL;
struct wpa_cred *selected2_home_cred = NULL;
wpa_s->network_select = 0;
wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)",
wpa_s->auto_select);
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
int excluded = 0;
int bh, bss_load, conn_capab;
cred = interworking_credentials_available(wpa_s, bss,
&excluded);
if (!cred)
continue;
if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
/*
* We currently support only HS 2.0 networks and those
* are required to use WPA2-Enterprise.
*/
wpa_printf(MSG_DEBUG, "Interworking: Credential match "
"with " MACSTR " but network does not use "
"RSN", MAC2STR(bss->bssid));
continue;
}
if (!excluded)
count++;
res = interworking_home_sp(wpa_s, bss->anqp ?
bss->anqp->domain_name : NULL);
if (res > 0)
type = "home";
else if (res == 0)
type = "roaming";
else
type = "unknown";
bh = cred_below_min_backhaul(wpa_s, cred, bss);
bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s id=%d priority=%d sp_priority=%d",
excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
MAC2STR(bss->bssid), type,
bh ? " below_min_backhaul=1" : "",
bss_load ? " over_max_bss_load=1" : "",
conn_capab ? " conn_capab_missing=1" : "",
cred->id, cred->priority, cred->sp_priority);
if (excluded)
continue;
if (wpa_s->auto_select ||
(wpa_s->conf->auto_interworking &&
wpa_s->auto_network_select)) {
if (bh || bss_load || conn_capab) {
if (selected2_cred == NULL ||
cred_prio_cmp(cred, selected2_cred) > 0) {
wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2");
selected2 = bss;
selected2_cred = cred;
}
if (res > 0 &&
(selected2_home_cred == NULL ||
cred_prio_cmp(cred, selected2_home_cred) >
0)) {
wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home");
selected2_home = bss;
selected2_home_cred = cred;
}
} else {
if (selected_cred == NULL ||
cred_prio_cmp(cred, selected_cred) > 0) {
wpa_printf(MSG_DEBUG, "Interworking: Mark as selected");
selected = bss;
selected_cred = cred;
}
if (res > 0 &&
(selected_home_cred == NULL ||
cred_prio_cmp(cred, selected_home_cred) >
0)) {
wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home");
selected_home = bss;
selected_home_cred = cred;
}
}
}
}
if (selected_home && selected_home != selected &&
selected_home_cred &&
(selected_cred == NULL ||
cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) {
/* Prefer network operated by the Home SP */
wpa_printf(MSG_DEBUG, "Interworking: Overrided selected with selected_home");
selected = selected_home;
selected_cred = selected_home_cred;
}
if (!selected) {
if (selected2_home) {
wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
selected = selected2_home;
selected_cred = selected2_home_cred;
} else if (selected2) {
wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
selected = selected2;
selected_cred = selected2_cred;
}
}
if (count == 0) {
/*
* No matching network was found based on configured
* credentials. Check whether any of the enabled network blocks
* have matching APs.
*/
if (interworking_find_network_match(wpa_s)) {
wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
"match for enabled network configurations");
if (wpa_s->auto_select) {
interworking_reconnect(wpa_s);
return;
}
}
if (wpa_s->auto_network_select) {
wpa_printf(MSG_DEBUG, "Interworking: Continue "
"scanning after ANQP fetch");
wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval,
0);
return;
}
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
"with matching credentials found");
}
if (selected) {
wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR,
MAC2STR(selected->bssid));
selected = pick_best_roaming_partner(wpa_s, selected,
selected_cred);
wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR
" (after best roaming partner selection)",
MAC2STR(selected->bssid));
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR,
MAC2STR(selected->bssid));
interworking_connect(wpa_s, selected);
}
}
static struct wpa_bss_anqp *
interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
struct wpa_bss *other;
if (is_zero_ether_addr(bss->hessid))
return NULL; /* Cannot be in the same homegenous ESS */
dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
if (other == bss)
continue;
if (other->anqp == NULL)
continue;
if (other->anqp->roaming_consortium == NULL &&
other->anqp->nai_realm == NULL &&
other->anqp->anqp_3gpp == NULL &&
other->anqp->domain_name == NULL)
continue;
if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
continue;
if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
continue;
if (bss->ssid_len != other->ssid_len ||
os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
continue;
wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
"already fetched BSSID " MACSTR " and " MACSTR,
MAC2STR(other->bssid), MAC2STR(bss->bssid));
other->anqp->users++;
return other->anqp;
}
return NULL;
}
static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
int found = 0;
const u8 *ie;
wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - "
"fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d",
wpa_s->fetch_anqp_in_progress,
wpa_s->fetch_osu_icon_in_progress);
if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) {
wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch");
return;
}
if (wpa_s->fetch_osu_icon_in_progress) {
wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)");
hs20_next_osu_icon(wpa_s);
return;
}
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (!(bss->caps & IEEE80211_CAP_ESS))
continue;
ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
continue; /* AP does not support Interworking */
if (disallowed_bssid(wpa_s, bss->bssid) ||
disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len))
continue; /* Disallowed BSS */
if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
if (bss->anqp == NULL) {
bss->anqp = interworking_match_anqp_info(wpa_s,
bss);
if (bss->anqp) {
/* Shared data already fetched */
continue;
}
bss->anqp = wpa_bss_anqp_alloc();
if (bss->anqp == NULL)
break;
}
found++;
bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
MACSTR, MAC2STR(bss->bssid));
interworking_anqp_send_req(wpa_s, bss);
break;
}
}
if (found == 0) {
if (wpa_s->fetch_osu_info) {
if (wpa_s->num_prov_found == 0 &&
wpa_s->fetch_osu_waiting_scan &&
wpa_s->num_osu_scans < 3) {
wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
hs20_start_osu_scan(wpa_s);
return;
}
wpa_printf(MSG_DEBUG, "Interworking: Next icon");
hs20_osu_icon_fetch(wpa_s);
return;
}
wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
wpa_s->fetch_anqp_in_progress = 0;
if (wpa_s->network_select)
interworking_select_network(wpa_s);
}
}
void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
wpa_s->fetch_anqp_in_progress = 1;
/*
* Start actual ANQP operation from eloop call to make sure the loop
* does not end up using excessive recursion.
*/
eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL);
}
int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
{
if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
return 0;
wpa_s->network_select = 0;
wpa_s->fetch_all_anqp = 1;
wpa_s->fetch_osu_info = 0;
interworking_start_fetch_anqp(wpa_s);
return 0;
}
void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->fetch_anqp_in_progress)
return;
wpa_s->fetch_anqp_in_progress = 0;
}
int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
u16 info_ids[], size_t num_ids, u32 subtypes)
{
struct wpabuf *buf;
struct wpabuf *hs20_buf = NULL;
int ret = 0;
int freq;
struct wpa_bss *bss;
int res;
freq = wpa_s->assoc_freq;
bss = wpa_bss_get_bssid(wpa_s, dst);
if (bss) {
wpa_bss_anqp_unshare_alloc(bss);
freq = bss->freq;
}
if (freq <= 0)
return -1;
wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
MAC2STR(dst), (unsigned int) num_ids);
#ifdef CONFIG_HS20
if (subtypes != 0) {
hs20_buf = wpabuf_alloc(100);
if (hs20_buf == NULL)
return -1;
hs20_put_anqp_req(subtypes, NULL, 0, hs20_buf);
}
#endif /* CONFIG_HS20 */
buf = anqp_build_req(info_ids, num_ids, hs20_buf);
wpabuf_free(hs20_buf);
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);
ret = -1;
} else
wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
"%u", res);
return ret;
}
static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss, const u8 *sa,
u16 info_id,
const u8 *data, size_t slen)
{
const u8 *pos = data;
struct wpa_bss_anqp *anqp = NULL;
#ifdef CONFIG_HS20
u8 type;
#endif /* CONFIG_HS20 */
if (bss)
anqp = bss->anqp;
switch (info_id) {
case ANQP_CAPABILITY_LIST:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" ANQP Capability list", MAC2STR(sa));
break;
case ANQP_VENUE_NAME:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Venue Name", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
if (anqp) {
wpabuf_free(anqp->venue_name);
anqp->venue_name = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_NETWORK_AUTH_TYPE:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Network Authentication Type information",
MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
"Type", pos, slen);
if (anqp) {
wpabuf_free(anqp->network_auth_type);
anqp->network_auth_type = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_ROAMING_CONSORTIUM:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Roaming Consortium list", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
pos, slen);
if (anqp) {
wpabuf_free(anqp->roaming_consortium);
anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_IP_ADDR_TYPE_AVAILABILITY:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" IP Address Type Availability information",
MAC2STR(sa));
wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
pos, slen);
if (anqp) {
wpabuf_free(anqp->ip_addr_type_availability);
anqp->ip_addr_type_availability =
wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_NAI_REALM:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" NAI Realm list", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
if (anqp) {
wpabuf_free(anqp->nai_realm);
anqp->nai_realm = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_3GPP_CELLULAR_NETWORK:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" 3GPP Cellular Network information", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
pos, slen);
if (anqp) {
wpabuf_free(anqp->anqp_3gpp);
anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_DOMAIN_NAME:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Domain Name list", MAC2STR(sa));
wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
if (anqp) {
wpabuf_free(anqp->domain_name);
anqp->domain_name = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_VENDOR_SPECIFIC:
if (slen < 3)
return;
switch (WPA_GET_BE24(pos)) {
#ifdef CONFIG_HS20
case OUI_WFA:
pos += 3;
slen -= 3;
if (slen < 1)
return;
type = *pos++;
slen--;
switch (type) {
case HS20_ANQP_OUI_TYPE:
hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa,
pos, slen);
break;
default:
wpa_printf(MSG_DEBUG, "HS20: Unsupported ANQP "
"vendor type %u", type);
break;
}
break;
#endif /* CONFIG_HS20 */
default:
wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
"vendor-specific ANQP OUI %06x",
WPA_GET_BE24(pos));
return;
}
break;
default:
wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
"%u", info_id);
break;
}
}
void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos;
const u8 *end;
u16 info_id;
u16 slen;
struct wpa_bss *bss = NULL, *tmp;
const char *anqp_result = "SUCCESS";
wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR
" dialog_token=%u result=%d status_code=%u",
MAC2STR(dst), dialog_token, result, status_code);
if (result != GAS_QUERY_SUCCESS) {
if (wpa_s->fetch_osu_icon_in_progress)
hs20_icon_fetch_failed(wpa_s);
anqp_result = "FAILURE";
goto out;
}
pos = wpabuf_head(adv_proto);
if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
"Protocol in response");
if (wpa_s->fetch_osu_icon_in_progress)
hs20_icon_fetch_failed(wpa_s);
anqp_result = "INVALID_FRAME";
goto out;
}
/*
* If possible, select the BSS entry based on which BSS entry was used
* for the request. This can help in cases where multiple BSS entries
* may exist for the same AP.
*/
dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) {
if (tmp == wpa_s->interworking_gas_bss &&
os_memcmp(tmp->bssid, dst, ETH_ALEN) == 0) {
bss = tmp;
break;
}
}
if (bss == NULL)
bss = wpa_bss_get_bssid(wpa_s, dst);
pos = wpabuf_head(resp);
end = pos + wpabuf_len(resp);
while (pos < end) {
unsigned int left = end - pos;
if (left < 4) {
wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
anqp_result = "INVALID_FRAME";
goto out_parse_done;
}
info_id = WPA_GET_LE16(pos);
pos += 2;
slen = WPA_GET_LE16(pos);
pos += 2;
left -= 4;
if (left < slen) {
wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
"for Info ID %u", info_id);
anqp_result = "INVALID_FRAME";
goto out_parse_done;
}
interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos,
slen);
pos += slen;
}
out_parse_done:
hs20_notify_parse_done(wpa_s);
out:
wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s",
MAC2STR(dst), anqp_result);
}
static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
"ANQP fetch");
interworking_start_fetch_anqp(wpa_s);
}
int interworking_select(struct wpa_supplicant *wpa_s, int auto_select,
int *freqs)
{
interworking_stop_fetch_anqp(wpa_s);
wpa_s->network_select = 1;
wpa_s->auto_network_select = 0;
wpa_s->auto_select = !!auto_select;
wpa_s->fetch_all_anqp = 0;
wpa_s->fetch_osu_info = 0;
wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
"selection");
wpa_s->scan_res_handler = interworking_scan_res_handler;
wpa_s->normal_scans = 0;
wpa_s->scan_req = MANUAL_SCAN_REQ;
os_free(wpa_s->manual_scan_freqs);
wpa_s->manual_scan_freqs = freqs;
wpa_s->after_wps = 0;
wpa_s->known_wps_freq = 0;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
}
static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpabuf *n;
wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR
" dialog_token=%d status_code=%d resp_len=%d",
MAC2STR(addr), dialog_token, status_code,
resp ? (int) wpabuf_len(resp) : -1);
if (!resp)
return;
n = wpabuf_dup(resp);
if (n == NULL)
return;
wpabuf_free(wpa_s->prev_gas_resp);
wpa_s->prev_gas_resp = wpa_s->last_gas_resp;
os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN);
wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token;
wpa_s->last_gas_resp = n;
os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN);
wpa_s->last_gas_dialog_token = dialog_token;
}
int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst,
const struct wpabuf *adv_proto,
const struct wpabuf *query)
{
struct wpabuf *buf;
int ret = 0;
int freq;
struct wpa_bss *bss;
int res;
size_t len;
u8 query_resp_len_limit = 0;
freq = wpa_s->assoc_freq;
bss = wpa_bss_get_bssid(wpa_s, dst);
if (bss)
freq = bss->freq;
if (freq <= 0)
return -1;
wpa_printf(MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)",
MAC2STR(dst), freq);
wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto);
wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query);
len = 3 + wpabuf_len(adv_proto) + 2;
if (query)
len += wpabuf_len(query);
buf = gas_build_initial_req(0, len);
if (buf == NULL)
return -1;
/* Advertisement Protocol IE */
wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */
wpabuf_put_u8(buf, query_resp_len_limit & 0x7f);
wpabuf_put_buf(buf, adv_proto);
/* GAS Query */
if (query) {
wpabuf_put_le16(buf, wpabuf_len(query));
wpabuf_put_buf(buf, query);
} else
wpabuf_put_le16(buf, 0);
res = gas_query_req(wpa_s->gas, dst, freq, buf, gas_resp_cb, wpa_s);
if (res < 0) {
wpa_printf(MSG_DEBUG, "GAS: Failed to send Query Request");
wpabuf_free(buf);
ret = -1;
} else
wpa_printf(MSG_DEBUG, "GAS: Query started with dialog token "
"%u", res);
return ret;
}
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