static void test_eapol_clean(struct eapol_test_data *e,
struct wpa_supplicant *wpa_s)
{
struct extra_radius_attr *p, *prev;
radius_client_deinit(e->radius);
wpabuf_free(e->last_eap_radius);
radius_msg_free(e->last_recv_radius);
e->last_recv_radius = NULL;
os_free(e->eap_identity);
e->eap_identity = NULL;
eapol_sm_deinit(wpa_s->eapol);
wpa_s->eapol = NULL;
if (e->radius_conf && e->radius_conf->auth_server) {
os_free(e->radius_conf->auth_server->shared_secret);
os_free(e->radius_conf->auth_server);
}
os_free(e->radius_conf);
e->radius_conf = NULL;
scard_deinit(wpa_s->scard);
if (wpa_s->ctrl_iface) {
wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
wpa_s->ctrl_iface = NULL;
}
ext_password_deinit(wpa_s->ext_pw);
wpa_s->ext_pw = NULL;
wpa_config_free(wpa_s->conf);
p = e->extra_attrs;
while (p) {
prev = p;
p = p->next;
os_free(prev);
}
}
static int radius_server_request(struct radius_server_data *data,
struct radius_msg *msg,
struct sockaddr *from, socklen_t fromlen,
struct radius_client *client,
const char *from_addr, int from_port,
struct radius_session *force_sess)
{
u8 *eap = NULL;
size_t eap_len;
int res, state_included = 0;
u8 statebuf[4];
unsigned int state;
struct radius_session *sess;
struct radius_msg *reply;
int is_complete = 0;
if (force_sess)
sess = force_sess;
else {
res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
sizeof(statebuf));
state_included = res >= 0;
if (res == sizeof(statebuf)) {
state = WPA_GET_BE32(statebuf);
sess = radius_server_get_session(client, state);
} else {
sess = NULL;
}
}
if (sess) {
RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
} else if (state_included) {
RADIUS_DEBUG("State attribute included but no session found");
radius_server_reject(data, client, msg, from, fromlen,
from_addr, from_port);
return -1;
} else {
sess = radius_server_get_new_session(data, client, msg);
if (sess == NULL) {
RADIUS_DEBUG("Could not create a new session");
radius_server_reject(data, client, msg, from, fromlen,
from_addr, from_port);
return -1;
}
}
if (sess->last_from_port == from_port &&
sess->last_identifier == msg->hdr->identifier &&
os_memcmp(sess->last_authenticator, msg->hdr->authenticator, 16) ==
0) {
RADIUS_DEBUG("Duplicate message from %s", from_addr);
data->counters.dup_access_requests++;
client->counters.dup_access_requests++;
if (sess->last_reply) {
res = sendto(data->auth_sock, sess->last_reply->buf,
sess->last_reply->buf_used, 0,
(struct sockaddr *) from, fromlen);
if (res < 0) {
perror("sendto[RADIUS SRV]");
}
return 0;
}
RADIUS_DEBUG("No previous reply available for duplicate "
"message");
return -1;
}
eap = radius_msg_get_eap(msg, &eap_len);
if (eap == NULL) {
RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
from_addr);
data->counters.packets_dropped++;
client->counters.packets_dropped++;
return -1;
}
RADIUS_DUMP("Received EAP data", eap, eap_len);
/* FIX: if Code is Request, Success, or Failure, send Access-Reject;
* RFC3579 Sect. 2.6.2.
* Include EAP-Response/Nak with no preferred method if
* code == request.
* If code is not 1-4, discard the packet silently.
* Or is this already done by the EAP state machine? */
wpabuf_free(sess->eap_if->eapRespData);
sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
if (sess->eap_if->eapRespData == NULL)
os_free(eap);
eap = NULL;
sess->eap_if->eapResp = TRUE;
eap_server_sm_step(sess->eap);
if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
RADIUS_DUMP("EAP data from the state machine",
wpabuf_head(sess->eap_if->eapReqData),
wpabuf_len(sess->eap_if->eapReqData));
} else if (sess->eap_if->eapFail) {
RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
"set");
} else if (eap_sm_method_pending(sess->eap)) {
if (sess->last_msg) {
radius_msg_free(sess->last_msg);
os_free(sess->last_msg);
}
sess->last_msg = msg;
sess->last_from_port = from_port;
os_free(sess->last_from_addr);
sess->last_from_addr = os_strdup(from_addr);
sess->last_fromlen = fromlen;
os_memcpy(&sess->last_from, from, fromlen);
return -2;
} else {
RADIUS_DEBUG("No EAP data from the state machine - ignore this"
" Access-Request silently (assuming it was a "
"duplicate)");
data->counters.packets_dropped++;
client->counters.packets_dropped++;
return -1;
}
if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
is_complete = 1;
reply = radius_server_encapsulate_eap(data, client, sess, msg);
if (reply) {
RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
if (wpa_debug_level <= MSG_MSGDUMP) {
radius_msg_dump(reply);
}
switch (reply->hdr->code) {
case RADIUS_CODE_ACCESS_ACCEPT:
data->counters.access_accepts++;
client->counters.access_accepts++;
break;
case RADIUS_CODE_ACCESS_REJECT:
data->counters.access_rejects++;
client->counters.access_rejects++;
break;
case RADIUS_CODE_ACCESS_CHALLENGE:
data->counters.access_challenges++;
client->counters.access_challenges++;
break;
}
res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0,
(struct sockaddr *) from, fromlen);
if (res < 0) {
perror("sendto[RADIUS SRV]");
}
if (sess->last_reply) {
radius_msg_free(sess->last_reply);
os_free(sess->last_reply);
}
sess->last_reply = reply;
sess->last_from_port = from_port;
sess->last_identifier = msg->hdr->identifier;
os_memcpy(sess->last_authenticator, msg->hdr->authenticator,
16);
} else {
data->counters.packets_dropped++;
client->counters.packets_dropped++;
}
if (is_complete) {
RADIUS_DEBUG("Removing completed session 0x%x after timeout",
sess->sess_id);
eloop_cancel_timeout(radius_server_session_remove_timeout,
data, sess);
eloop_register_timeout(10, 0,
radius_server_session_remove_timeout,
data, sess);
}
return 0;
}
static struct radius_msg *
radius_server_encapsulate_eap(struct radius_server_data *data,
struct radius_client *client,
struct radius_session *sess,
struct radius_msg *request)
{
struct radius_msg *msg;
int code;
unsigned int sess_id;
if (sess->eap_if->eapFail) {
sess->eap_if->eapFail = FALSE;
code = RADIUS_CODE_ACCESS_REJECT;
} else if (sess->eap_if->eapSuccess) {
sess->eap_if->eapSuccess = FALSE;
code = RADIUS_CODE_ACCESS_ACCEPT;
} else {
sess->eap_if->eapReq = FALSE;
code = RADIUS_CODE_ACCESS_CHALLENGE;
}
msg = radius_msg_new(code, request->hdr->identifier);
if (msg == NULL) {
RADIUS_DEBUG("Failed to allocate reply message");
return NULL;
}
sess_id = htonl(sess->sess_id);
if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
!radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
(u8 *) &sess_id, sizeof(sess_id))) {
RADIUS_DEBUG("Failed to add State attribute");
}
if (sess->eap_if->eapReqData &&
!radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
wpabuf_len(sess->eap_if->eapReqData))) {
RADIUS_DEBUG("Failed to add EAP-Message attribute");
}
if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
int len;
if (sess->eap_if->eapKeyDataLen > 64) {
len = 32;
} else {
len = sess->eap_if->eapKeyDataLen / 2;
}
if (!radius_msg_add_mppe_keys(msg, request->hdr->authenticator,
(u8 *) client->shared_secret,
client->shared_secret_len,
sess->eap_if->eapKeyData + len,
len, sess->eap_if->eapKeyData,
len)) {
RADIUS_DEBUG("Failed to add MPPE key attributes");
}
}
if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
radius_msg_free(msg);
os_free(msg);
return NULL;
}
if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
client->shared_secret_len,
request->hdr->authenticator) < 0) {
RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
}
return msg;
}
static void radius_server_receive_auth(int sock, void *eloop_ctx,
void *sock_ctx)
{
struct radius_server_data *data = eloop_ctx;
u8 *buf = NULL;
struct sockaddr_in from;
socklen_t fromlen;
int len;
struct radius_client *client;
struct radius_msg *msg = NULL;
buf = malloc(RADIUS_MAX_MSG_LEN);
if (buf == NULL) {
goto fail;
}
fromlen = sizeof(from);
len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
(struct sockaddr *) &from, &fromlen);
if (len < 0) {
perror("recvfrom[radius_server]");
goto fail;
}
RADIUS_DEBUG("Received %d bytes from %s:%d",
len, inet_ntoa(from.sin_addr), ntohs(from.sin_port));
RADIUS_DUMP("Received data", buf, len);
client = radius_server_get_client(data, &from.sin_addr);
if (client == NULL) {
RADIUS_DEBUG("Unknown client %s - packet ignored",
inet_ntoa(from.sin_addr));
goto fail;
}
msg = radius_msg_parse(buf, len);
if (msg == NULL) {
RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
goto fail;
}
free(buf);
buf = NULL;
if (wpa_debug_level <= MSG_MSGDUMP) {
radius_msg_dump(msg);
}
if (msg->hdr->code != RADIUS_CODE_ACCESS_REQUEST) {
RADIUS_DEBUG("Unexpected RADIUS code %d", msg->hdr->code);
goto fail;
}
if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
client->shared_secret_len, NULL)) {
RADIUS_DEBUG("Invalid Message-Authenticator from %s",
inet_ntoa(from.sin_addr));
goto fail;
}
radius_server_request(data, msg, &from, client);
fail:
if (msg) {
radius_msg_free(msg);
free(msg);
}
free(buf);
}
static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
struct radius_client_data *radius = eloop_ctx;
struct hostapd_radius_servers *conf = radius->conf;
RadiusType msg_type = (RadiusType) sock_ctx;
int len, roundtrip;
unsigned char buf[3000];
struct radius_msg *msg;
struct radius_hdr *hdr;
struct radius_rx_handler *handlers;
size_t num_handlers, i;
struct radius_msg_list *req, *prev_req;
struct os_reltime now;
struct hostapd_radius_server *rconf;
int invalid_authenticator = 0;
if (msg_type == RADIUS_ACCT) {
handlers = radius->acct_handlers;
num_handlers = radius->num_acct_handlers;
rconf = conf->acct_server;
} else {
handlers = radius->auth_handlers;
num_handlers = radius->num_auth_handlers;
rconf = conf->auth_server;
}
len = recv(sock, buf, sizeof(buf), MSG_DONTWAIT);
if (len < 0) {
wpa_printf(MSG_INFO, "recv[RADIUS]: %s", strerror(errno));
return;
}
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG, "Received %d bytes from RADIUS "
"server", len);
if (len == sizeof(buf)) {
wpa_printf(MSG_INFO, "RADIUS: Possibly too long UDP frame for our buffer - dropping it");
return;
}
msg = radius_msg_parse(buf, len);
if (msg == NULL) {
wpa_printf(MSG_INFO, "RADIUS: Parsing incoming frame failed");
rconf->malformed_responses++;
return;
}
hdr = radius_msg_get_hdr(msg);
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG, "Received RADIUS message");
if (conf->msg_dumps)
radius_msg_dump(msg);
switch (hdr->code) {
case RADIUS_CODE_ACCESS_ACCEPT:
rconf->access_accepts++;
break;
case RADIUS_CODE_ACCESS_REJECT:
rconf->access_rejects++;
break;
case RADIUS_CODE_ACCESS_CHALLENGE:
rconf->access_challenges++;
break;
case RADIUS_CODE_ACCOUNTING_RESPONSE:
rconf->responses++;
break;
}
prev_req = NULL;
req = radius->msgs;
while (req) {
/* TODO: also match by src addr:port of the packet when using
* alternative RADIUS servers (?) */
if ((req->msg_type == msg_type ||
(req->msg_type == RADIUS_ACCT_INTERIM &&
msg_type == RADIUS_ACCT)) &&
radius_msg_get_hdr(req->msg)->identifier ==
hdr->identifier)
break;
prev_req = req;
req = req->next;
}
if (req == NULL) {
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG,
"No matching RADIUS request found (type=%d "
"id=%d) - dropping packet",
msg_type, hdr->identifier);
goto fail;
}
os_get_reltime(&now);
roundtrip = (now.sec - req->last_attempt.sec) * 100 +
(now.usec - req->last_attempt.usec) / 10000;
hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG,
"Received RADIUS packet matched with a pending "
"request, round trip time %d.%02d sec",
roundtrip / 100, roundtrip % 100);
rconf->round_trip_time = roundtrip;
/* Remove ACKed RADIUS packet from retransmit list */
if (prev_req)
prev_req->next = req->next;
else
radius->msgs = req->next;
radius->num_msgs--;
for (i = 0; i < num_handlers; i++) {
RadiusRxResult res;
res = handlers[i].handler(msg, req->msg, req->shared_secret,
req->shared_secret_len,
handlers[i].data);
switch (res) {
case RADIUS_RX_PROCESSED:
radius_msg_free(msg);
/* continue */
case RADIUS_RX_QUEUED:
radius_client_msg_free(req);
return;
case RADIUS_RX_INVALID_AUTHENTICATOR:
invalid_authenticator++;
/* continue */
case RADIUS_RX_UNKNOWN:
/* continue with next handler */
break;
}
}
if (invalid_authenticator)
rconf->bad_authenticators++;
else
rconf->unknown_types++;
hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG, "No RADIUS RX handler found "
"(type=%d code=%d id=%d)%s - dropping packet",
msg_type, hdr->code, hdr->identifier,
invalid_authenticator ? " [INVALID AUTHENTICATOR]" :
"");
radius_client_msg_free(req);
fail:
radius_msg_free(msg);
}
/**
* radius_msg_parse - Parse a RADIUS message
* @data: RADIUS message to be parsed
* @len: Length of data buffer in octets
* Returns: Parsed RADIUS message or %NULL on failure
*
* This parses a RADIUS message and makes a copy of its data. The caller is
* responsible for freeing the returned data with radius_msg_free().
*/
struct radius_msg * radius_msg_parse(const u8 *data, size_t len)
{
struct radius_msg *msg;
struct radius_hdr *hdr;
struct radius_attr_hdr *attr;
size_t msg_len;
unsigned char *pos, *end;
if (data == NULL || len < sizeof(*hdr))
return NULL;
hdr = (struct radius_hdr *) data;
msg_len = ntohs(hdr->length);
if (msg_len < sizeof(*hdr) || msg_len > len) {
wpa_printf(MSG_INFO, "RADIUS: Invalid message length");
return NULL;
}
if (msg_len < len) {
wpa_printf(MSG_DEBUG, "RADIUS: Ignored %lu extra bytes after "
"RADIUS message", (unsigned long) len - msg_len);
}
msg = os_zalloc(sizeof(*msg));
if (msg == NULL)
return NULL;
msg->buf = wpabuf_alloc_copy(data, msg_len);
if (msg->buf == NULL || radius_msg_initialize(msg)) {
radius_msg_free(msg);
return NULL;
}
msg->hdr = wpabuf_mhead(msg->buf);
/* parse attributes */
pos = wpabuf_mhead_u8(msg->buf) + sizeof(struct radius_hdr);
end = wpabuf_mhead_u8(msg->buf) + wpabuf_len(msg->buf);
while (pos < end) {
if ((size_t) (end - pos) < sizeof(*attr))
goto fail;
attr = (struct radius_attr_hdr *) pos;
if (pos + attr->length > end || attr->length < sizeof(*attr))
goto fail;
/* TODO: check that attr->length is suitable for attr->type */
if (radius_msg_add_attr_to_array(msg, attr))
goto fail;
pos += attr->length;
}
return msg;
fail:
radius_msg_free(msg);
return NULL;
}
static int hostapd_radius_acl_query(struct hostapd_data *hapd, const u8 *addr,
struct hostapd_acl_query_data *query)
{
struct radius_msg *msg;
char buf[128];
query->radius_id = radius_client_get_id(hapd->radius);
msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, query->radius_id);
if (msg == NULL)
return -1;
radius_msg_make_authenticator(msg, addr, ETH_ALEN);
os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT, MAC2STR(addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, (u8 *) buf,
os_strlen(buf))) {
wpa_printf(MSG_DEBUG, "Could not add User-Name");
goto fail;
}
if (!radius_msg_add_attr_user_password(
msg, (u8 *) buf, os_strlen(buf),
hapd->conf->radius->auth_server->shared_secret,
hapd->conf->radius->auth_server->shared_secret_len)) {
wpa_printf(MSG_DEBUG, "Could not add User-Password");
goto fail;
}
if (hapd->conf->own_ip_addr.af == AF_INET &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
(u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
wpa_printf(MSG_DEBUG, "Could not add NAS-IP-Address");
goto fail;
}
#ifdef CONFIG_IPV6
if (hapd->conf->own_ip_addr.af == AF_INET6 &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
(u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
wpa_printf(MSG_DEBUG, "Could not add NAS-IPv6-Address");
goto fail;
}
#endif /* CONFIG_IPV6 */
if (hapd->conf->nas_identifier &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
(u8 *) hapd->conf->nas_identifier,
os_strlen(hapd->conf->nas_identifier))) {
wpa_printf(MSG_DEBUG, "Could not add NAS-Identifier");
goto fail;
}
os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
(u8 *) buf, os_strlen(buf))) {
wpa_printf(MSG_DEBUG, "Could not add Called-Station-Id");
goto fail;
}
os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
(u8 *) buf, os_strlen(buf))) {
wpa_printf(MSG_DEBUG, "Could not add Calling-Station-Id");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
wpa_printf(MSG_DEBUG, "Could not add NAS-Port-Type");
goto fail;
}
os_snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
(u8 *) buf, os_strlen(buf))) {
wpa_printf(MSG_DEBUG, "Could not add Connect-Info");
goto fail;
}
radius_client_send(hapd->radius, msg, RADIUS_AUTH, addr);
return 0;
fail:
radius_msg_free(msg);
return -1;
}
/* Process the RADIUS frames from Authentication Server */
static RadiusRxResult
ieee802_1x_receive_auth(struct wpa_supplicant *wpa_s,
struct radius_msg *msg, struct radius_msg *req,
u8 *shared_secret, size_t shared_secret_len,
void *data)
{
#if 0
u32 session_timeout, termination_action;
int session_timeout_set;
int acct_interim_interval;
#endif
#if 0
sta = ap_get_sta_radius_identifier(hapd, msg->hdr->identifier);
if (sta == NULL) {
wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not "
"find matching station for this RADIUS "
"message\n");
return RADIUS_RX_UNKNOWN;
}
#endif
/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
* present when packet contains an EAP-Message attribute */
if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
0) < 0 &&
radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
wpa_printf(MSG_DEBUG, "Allowing RADIUS "
"Access-Reject without Message-Authenticator "
"since it does not include EAP-Message\n");
} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
req)) {
printf("Incoming RADIUS packet did not have correct "
"Message-Authenticator - dropped\n");
return RADIUS_RX_UNKNOWN;
}
if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
printf("Unknown RADIUS message code\n");
return RADIUS_RX_UNKNOWN;
}
wpa_s->radius_identifier = -1;
wpa_printf(MSG_DEBUG, "RADIUS packet matching with station");
if (wpa_s->last_recv_radius) {
radius_msg_free(wpa_s->last_recv_radius);
free(wpa_s->last_recv_radius);
}
wpa_s->last_recv_radius = msg;
#if 0
session_timeout_set =
!radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
&session_timeout);
if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
&termination_action))
termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
if (hapd->conf->radius_acct_interim_interval == 0 &&
msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
&acct_interim_interval) == 0) {
if (acct_interim_interval < 60) {
hostapd_logger(hapd, sta->addr,
HOSTAPD_MODULE_IEEE8021X,
HOSTAPD_LEVEL_INFO,
"ignored too small "
"Acct-Interim-Interval %d",
acct_interim_interval);
} else
sta->acct_interim_interval = acct_interim_interval;
}
switch (msg->hdr->code) {
case RADIUS_CODE_ACCESS_ACCEPT:
/* draft-congdon-radius-8021x-22.txt, Ch. 3.17 */
if (session_timeout_set &&
termination_action ==
RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
sta->eapol_sm->reauth_timer.reAuthPeriod =
session_timeout;
} else if (session_timeout_set)
ap_sta_session_timeout(hapd, sta, session_timeout);
sta->eapol_sm->be_auth.aSuccess = TRUE;
ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
shared_secret_len);
if (sta->eapol_sm->keyAvailable) {
pmksa_cache_add(hapd, sta, sta->eapol_key_crypt,
session_timeout_set ?
session_timeout : -1);
}
break;
case RADIUS_CODE_ACCESS_REJECT:
sta->eapol_sm->be_auth.aFail = TRUE;
break;
case RADIUS_CODE_ACCESS_CHALLENGE:
if (session_timeout_set) {
/* RFC 2869, Ch. 2.3.2
* draft-congdon-radius-8021x-22.txt, Ch. 3.17 */
sta->eapol_sm->be_auth.suppTimeout = session_timeout;
}
sta->eapol_sm->be_auth.aReq = TRUE;
break;
}
#else
switch (msg->hdr->code) {
case RADIUS_CODE_ACCESS_ACCEPT:
wpa_s->radius_access_accept_received = 1;
ieee802_1x_get_keys(wpa_s, msg, req, shared_secret,
shared_secret_len);
break;
case RADIUS_CODE_ACCESS_REJECT:
wpa_s->radius_access_reject_received = 1;
break;
}
#endif
ieee802_1x_decapsulate_radius(wpa_s);
/* eapol_sm_step(sta->eapol_sm); */
if (msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT ||
msg->hdr->code == RADIUS_CODE_ACCESS_REJECT) {
eloop_terminate();
}
return RADIUS_RX_QUEUED;
}
static struct radius_msg * accounting_msg(struct hostapd_data *hapd,
struct sta_info *sta,
int status_type)
{
struct radius_msg *msg;
char buf[128];
u8 *val;
size_t len;
int i;
msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
radius_client_get_id(hapd->radius));
if (msg == NULL) {
printf("Could not create net RADIUS packet\n");
return NULL;
}
if (sta) {
radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
os_snprintf(buf, sizeof(buf), "%08X-%08X",
sta->acct_session_id_hi, sta->acct_session_id_lo);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
(u8 *) buf, os_strlen(buf))) {
printf("Could not add Acct-Session-Id\n");
goto fail;
}
} else {
radius_msg_make_authenticator(msg, (u8 *) hapd, sizeof(*hapd));
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
status_type)) {
printf("Could not add Acct-Status-Type\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
hapd->conf->ieee802_1x ?
RADIUS_ACCT_AUTHENTIC_RADIUS :
RADIUS_ACCT_AUTHENTIC_LOCAL)) {
printf("Could not add Acct-Authentic\n");
goto fail;
}
if (sta) {
val = ieee802_1x_get_identity(sta->eapol_sm, &len);
if (!val) {
os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
MAC2STR(sta->addr));
val = (u8 *) buf;
len = os_strlen(buf);
}
if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
len)) {
printf("Could not add User-Name\n");
goto fail;
}
}
if (hapd->conf->own_ip_addr.af == AF_INET &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
(u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
printf("Could not add NAS-IP-Address\n");
goto fail;
}
#ifdef CONFIG_IPV6
if (hapd->conf->own_ip_addr.af == AF_INET6 &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
(u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
printf("Could not add NAS-IPv6-Address\n");
goto fail;
}
#endif /* CONFIG_IPV6 */
if (hapd->conf->nas_identifier &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
(u8 *) hapd->conf->nas_identifier,
os_strlen(hapd->conf->nas_identifier))) {
printf("Could not add NAS-Identifier\n");
goto fail;
}
if (sta &&
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
printf("Could not add NAS-Port\n");
goto fail;
}
os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
(u8 *) buf, os_strlen(buf))) {
printf("Could not add Called-Station-Id\n");
goto fail;
}
if (sta) {
os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(sta->addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
(u8 *) buf, os_strlen(buf))) {
printf("Could not add Calling-Station-Id\n");
goto fail;
}
if (!radius_msg_add_attr_int32(
msg, RADIUS_ATTR_NAS_PORT_TYPE,
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
printf("Could not add NAS-Port-Type\n");
goto fail;
}
os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
radius_sta_rate(hapd, sta) / 2,
(radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
radius_mode_txt(hapd));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
(u8 *) buf, os_strlen(buf))) {
printf("Could not add Connect-Info\n");
goto fail;
}
for (i = 0; ; i++) {
val = ieee802_1x_get_radius_class(sta->eapol_sm, &len,
i);
if (val == NULL)
break;
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS,
val, len)) {
printf("Could not add Class\n");
goto fail;
}
}
}
return msg;
fail:
radius_msg_free(msg);
os_free(msg);
return NULL;
}
static struct radius_msg * accounting_msg(hostapd *hapd, struct sta_info *sta,
int status_type)
{
struct radius_msg *msg;
char buf[128];
u8 *val;
size_t len;
msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
radius_client_get_id(hapd));
if (msg == NULL) {
printf("Could not create net RADIUS packet\n");
return NULL;
}
radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(sta));
snprintf(buf, sizeof(buf), "%08X-%08X",
hapd->radius->acct_session_id_hi, sta->acct_session_id_lo);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
buf, strlen(buf))) {
printf("Could not add Acct-Session-Id\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
status_type)) {
printf("Could not add Acct-Status-Type\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
hapd->conf->ieee802_1x ?
RADIUS_ACCT_AUTHENTIC_RADIUS :
RADIUS_ACCT_AUTHENTIC_LOCAL)) {
printf("Could not add Acct-Authentic\n");
goto fail;
}
val = sta->identity;
len = sta->identity_len;
if (!val) {
snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
MAC2STR(sta->addr));
val = buf;
len = strlen(val);
}
if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val, len)) {
printf("Could not add User-Name\n");
goto fail;
}
if (!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
(u8 *) &hapd->conf->own_ip_addr, 4)) {
printf("Could not add NAS-IP-Address\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
printf("Could not add NAS-Port\n");
goto fail;
}
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
MAC2STR(hapd->own_addr), hapd->conf->ssid);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
buf, strlen(buf))) {
printf("Could not add Called-Station-Id\n");
goto fail;
}
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(sta->addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
buf, strlen(buf))) {
printf("Could not add Calling-Station-Id\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
printf("Could not add NAS-Port-Type\n");
goto fail;
}
snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
buf, strlen(buf))) {
printf("Could not add Connect-Info\n");
goto fail;
}
return msg;
fail:
radius_msg_free(msg);
free(msg);
return NULL;
}
static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
hostapd *hapd = (hostapd *) eloop_ctx;
RadiusType msg_type = (RadiusType) sock_ctx;
int len, i;
unsigned char buf[3000];
struct radius_msg *msg;
struct radius_rx_handler *handlers;
size_t num_handlers;
struct radius_msg_list *req, *prev_req;
len = recv(sock, buf, sizeof(buf), 0);
if (len < 0) {
perror("recv[RADIUS]");
return;
}
HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
"Received %d bytes from RADIUS server\n", len);
if (len == sizeof(buf)) {
printf("Possibly too long UDP frame for our buffer - "
"dropping it\n");
return;
}
msg = radius_msg_parse(buf, len);
if (msg == NULL) {
printf("Parsing incoming RADIUS frame failed\n");
return;
}
HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
"Received RADIUS message\n");
if (HOSTAPD_DEBUG_COND(HOSTAPD_DEBUG_MSGDUMPS))
radius_msg_dump(msg);
if (msg_type == RADIUS_ACCT) {
handlers = hapd->radius->acct_handlers;
num_handlers = hapd->radius->num_acct_handlers;
} else {
handlers = hapd->radius->auth_handlers;
num_handlers = hapd->radius->num_auth_handlers;
}
prev_req = NULL;
req = hapd->radius->msgs;
while (req) {
/* TODO: also match by src addr:port of the packet when using
* alternative RADIUS servers (?) */
if (req->msg_type == msg_type &&
req->msg->hdr->identifier == msg->hdr->identifier)
break;
prev_req = req;
req = req->next;
}
if (req == NULL) {
HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
"No maching RADIUS request found (type=%d id=%d)"
" - dropping packet\n",
msg_type, msg->hdr->identifier);
goto fail;
}
/* Remove ACKed RADIUS packet from retransmit list */
if (prev_req)
prev_req->next = req->next;
else
hapd->radius->msgs = req->next;
hapd->radius->num_msgs--;
for (i = 0; i < num_handlers; i++) {
RadiusRxResult res;
res = handlers[i].handler(hapd, msg, req->msg,
req->shared_secret,
req->shared_secret_len,
handlers[i].data);
switch (res) {
case RADIUS_RX_PROCESSED:
radius_msg_free(msg);
free(msg);
/* continue */
case RADIUS_RX_QUEUED:
radius_client_msg_free(req);
return;
case RADIUS_RX_UNKNOWN:
/* continue with next handler */
break;
}
}
printf("No RADIUS RX handler found (type=%d code=%d id=%d) - dropping "
"packet\n", msg_type, msg->hdr->code, msg->hdr->identifier);
radius_client_msg_free(req);
fail:
radius_msg_free(msg);
free(msg);
}
void accounting_sta_report(hostapd *hapd, struct sta_info *sta, int stop)
{
struct radius_msg *msg;
int cause = sta->acct_terminate_cause;
struct hostap_sta_driver_data data;
if (!hapd->conf->acct_server)
return;
msg = accounting_msg(hapd, sta,
stop ? RADIUS_ACCT_STATUS_TYPE_STOP :
RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE);
if (!msg) {
printf("Could not create RADIUS Accounting message\n");
return;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
time(NULL) - sta->acct_session_start)) {
printf("Could not add Acct-Session-Time\n");
goto fail;
}
if (hostapd_read_sta_driver_data(hapd, &data, sta->addr) == 0) {
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_INPUT_PACKETS,
data.rx_packets)) {
printf("Could not add Acct-Input-Packets\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_OUTPUT_PACKETS,
data.tx_packets)) {
printf("Could not add Acct-Output-Packets\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_INPUT_OCTETS,
data.rx_bytes)) {
printf("Could not add Acct-Input-Octets\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_OUTPUT_OCTETS,
data.tx_bytes)) {
printf("Could not add Acct-Output-Octets\n");
goto fail;
}
}
if (eloop_terminated())
cause = RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT;
if (stop && cause &&
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
cause)) {
printf("Could not add Acct-Terminate-Cause\n");
goto fail;
}
radius_client_send(hapd, msg, RADIUS_ACCT);
return;
fail:
radius_msg_free(msg);
free(msg);
}
static int hostapd_radius_acl_query(hostapd *hapd, u8 *addr,
struct hostapd_acl_query_data *query)
{
struct radius_msg *msg;
char buf[128];
query->radius_id = radius_client_get_id(hapd);
msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, query->radius_id);
if (msg == NULL)
return -1;
radius_msg_make_authenticator(msg, addr, ETH_ALEN);
snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT, MAC2STR(addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, buf,
strlen(buf))) {
printf("Could not add User-Name\n");
goto fail;
}
if (!radius_msg_add_attr_user_password(
msg, buf, strlen(buf),
hapd->conf->auth_server->shared_secret,
hapd->conf->auth_server->shared_secret_len)) {
printf("Could not add User-Password\n");
goto fail;
}
if (!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
(u8 *) &hapd->conf->own_ip_addr, 4)) {
printf("Could not add NAS-IP-Address\n");
goto fail;
}
if (hapd->conf->nas_identifier &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
hapd->conf->nas_identifier,
strlen(hapd->conf->nas_identifier))) {
printf("Could not add NAS-Identifier\n");
goto fail;
}
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
MAC2STR(hapd->own_addr), hapd->conf->ssid);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
buf, strlen(buf))) {
printf("Could not add Called-Station-Id\n");
goto fail;
}
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
buf, strlen(buf))) {
printf("Could not add Calling-Station-Id\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
printf("Could not add NAS-Port-Type\n");
goto fail;
}
snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
buf, strlen(buf))) {
printf("Could not add Connect-Info\n");
goto fail;
}
radius_client_send(hapd, msg, RADIUS_AUTH, addr);
return 0;
fail:
radius_msg_free(msg);
free(msg);
return -1;
}
static struct radius_msg *
radius_server_encapsulate_eap(struct radius_server_data *data,
struct radius_client *client,
struct radius_session *sess,
struct radius_msg *request)
{
struct radius_msg *msg;
int code;
unsigned int sess_id;
struct radius_hdr *hdr = radius_msg_get_hdr(request);
if (sess->eap_if->eapFail) {
sess->eap_if->eapFail = FALSE;
code = RADIUS_CODE_ACCESS_REJECT;
} else if (sess->eap_if->eapSuccess) {
sess->eap_if->eapSuccess = FALSE;
code = RADIUS_CODE_ACCESS_ACCEPT;
} else {
sess->eap_if->eapReq = FALSE;
code = RADIUS_CODE_ACCESS_CHALLENGE;
}
msg = radius_msg_new(code, hdr->identifier);
if (msg == NULL) {
RADIUS_DEBUG("Failed to allocate reply message");
return NULL;
}
sess_id = htonl(sess->sess_id);
if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
!radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
(u8 *) &sess_id, sizeof(sess_id))) {
RADIUS_DEBUG("Failed to add State attribute");
}
if (sess->eap_if->eapReqData &&
!radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
wpabuf_len(sess->eap_if->eapReqData))) {
RADIUS_DEBUG("Failed to add EAP-Message attribute");
}
if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
int len;
#ifdef CONFIG_RADIUS_TEST
if (data->dump_msk_file) {
FILE *f;
char buf[2 * 64 + 1];
f = fopen(data->dump_msk_file, "a");
if (f) {
len = sess->eap_if->eapKeyDataLen;
if (len > 64)
len = 64;
len = wpa_snprintf_hex(
buf, sizeof(buf),
sess->eap_if->eapKeyData, len);
buf[len] = '\0';
fprintf(f, "%s\n", buf);
fclose(f);
}
}
#endif /* CONFIG_RADIUS_TEST */
if (sess->eap_if->eapKeyDataLen > 64) {
len = 32;
} else {
len = sess->eap_if->eapKeyDataLen / 2;
}
if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
(u8 *) client->shared_secret,
client->shared_secret_len,
sess->eap_if->eapKeyData + len,
len, sess->eap_if->eapKeyData,
len)) {
RADIUS_DEBUG("Failed to add MPPE key attributes");
}
}
if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
radius_msg_free(msg);
return NULL;
}
if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
client->shared_secret_len,
hdr->authenticator) < 0) {
RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
}
return msg;
}
static void radius_server_receive_auth(int sock, void *eloop_ctx,
void *sock_ctx)
{
struct radius_server_data *data = eloop_ctx;
u8 *buf = NULL;
union {
struct sockaddr_storage ss;
struct sockaddr_in sin;
#ifdef CONFIG_IPV6
struct sockaddr_in6 sin6;
#endif /* CONFIG_IPV6 */
} from;
socklen_t fromlen;
int len;
struct radius_client *client = NULL;
struct radius_msg *msg = NULL;
char abuf[50];
int from_port = 0;
buf = os_malloc(RADIUS_MAX_MSG_LEN);
if (buf == NULL) {
goto fail;
}
fromlen = sizeof(from);
len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
(struct sockaddr *) &from.ss, &fromlen);
if (len < 0) {
perror("recvfrom[radius_server]");
goto fail;
}
#ifdef CONFIG_IPV6
if (data->ipv6) {
if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
sizeof(abuf)) == NULL)
abuf[0] = '\0';
from_port = ntohs(from.sin6.sin6_port);
RADIUS_DEBUG("Received %d bytes from %s:%d",
len, abuf, from_port);
client = radius_server_get_client(data,
(struct in_addr *)
&from.sin6.sin6_addr, 1);
}
#endif /* CONFIG_IPV6 */
if (!data->ipv6) {
os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
from_port = ntohs(from.sin.sin_port);
RADIUS_DEBUG("Received %d bytes from %s:%d",
len, abuf, from_port);
client = radius_server_get_client(data, &from.sin.sin_addr, 0);
}
RADIUS_DUMP("Received data", buf, len);
if (client == NULL) {
RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
data->counters.invalid_requests++;
goto fail;
}
msg = radius_msg_parse(buf, len);
if (msg == NULL) {
RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
data->counters.malformed_access_requests++;
client->counters.malformed_access_requests++;
goto fail;
}
os_free(buf);
buf = NULL;
if (wpa_debug_level <= MSG_MSGDUMP) {
radius_msg_dump(msg);
}
if (msg->hdr->code != RADIUS_CODE_ACCESS_REQUEST) {
RADIUS_DEBUG("Unexpected RADIUS code %d", msg->hdr->code);
data->counters.unknown_types++;
client->counters.unknown_types++;
goto fail;
}
data->counters.access_requests++;
client->counters.access_requests++;
if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
client->shared_secret_len, NULL)) {
RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
data->counters.bad_authenticators++;
client->counters.bad_authenticators++;
goto fail;
}
if (radius_server_request(data, msg, (struct sockaddr *) &from,
fromlen, client, abuf, from_port, NULL) ==
-2)
return; /* msg was stored with the session */
fail:
if (msg) {
radius_msg_free(msg);
os_free(msg);
}
os_free(buf);
}
/* Modified version of radius_msg_parse */
int rgw_msg_parse(unsigned char * buf, size_t len, struct rgw_radius_msg_meta ** msg)
{
struct rgw_radius_msg_meta * temp_msg = NULL;
struct radius_hdr *hdr;
struct radius_attr_hdr *attr;
size_t msg_len;
unsigned char *pos, *end;
int ret = 0;
TRACE_ENTRY("%p %zd %p", buf, len, msg);
CHECK_PARAMS( buf && len >= sizeof(*hdr) && msg );
*msg = NULL;
/* Parse the RADIUS message */
hdr = (struct radius_hdr *) buf;
msg_len = ntohs(hdr->length);
if (msg_len < sizeof(*hdr) || msg_len > len) {
TRACE_DEBUG(INFO, "Invalid RADIUS message length");
return EINVAL;
}
if (msg_len < len) {
TRACE_DEBUG(INFO, "Ignored %lu extra bytes after RADIUS message",
(unsigned long) len - msg_len);
}
CHECK_MALLOC( temp_msg = malloc(sizeof(struct rgw_radius_msg_meta)) );
memset(temp_msg, 0, sizeof(struct rgw_radius_msg_meta));
if (radius_msg_initialize(&temp_msg->radius, msg_len)) {
TRACE_DEBUG(INFO, "Error in radius_msg_initialize, returning ENOMEM.");
free(temp_msg);
return ENOMEM;
}
/* Store the received data in the alloc'd buffer */
memcpy(temp_msg->radius.buf, buf, msg_len);
temp_msg->radius.buf_size = temp_msg->radius.buf_used = msg_len;
/* parse attributes */
pos = (unsigned char *) (temp_msg->radius.hdr + 1);
end = temp_msg->radius.buf + temp_msg->radius.buf_used;
while (pos < end) {
if ((size_t) (end - pos) < sizeof(*attr)) {
TRACE_DEBUG(INFO, "Trucated attribute found in RADIUS buffer, EINVAL.");
ret = EINVAL;
break;
}
attr = (struct radius_attr_hdr *) pos;
if (pos + attr->length > end || attr->length < sizeof(*attr)) {
TRACE_DEBUG(INFO, "Trucated attribute found in RADIUS buffer, EINVAL.");
ret = EINVAL;
break;
}
if (radius_msg_add_attr_to_array(&temp_msg->radius, attr)) {
TRACE_DEBUG(INFO, "Error in radius_msg_add_attr_to_array, ENOMEM");
ret = ENOMEM;
break;
}
if (attr->type == RADIUS_ATTR_PROXY_STATE)
temp_msg->ps_nb += 1;
pos += attr->length;
}
if (ret != 0) {
radius_msg_free(&temp_msg->radius);
free(temp_msg);
return ret;
}
/* Now move all the proxy-state attributes at the end of the attr_pos array */
if (temp_msg->ps_nb) {
size_t *temp_ps = NULL;
int n, new_n = 0, p = 0;
CHECK_MALLOC( temp_ps = calloc(temp_msg->ps_nb, sizeof(size_t)) );
/* Move all the Proxy-State attributes into the temp_ps array */
for (n=0; n < temp_msg->radius.attr_used; n++) {
struct radius_attr_hdr * attr = (struct radius_attr_hdr *)(temp_msg->radius.buf + temp_msg->radius.attr_pos[n]);
if (attr->type == RADIUS_ATTR_PROXY_STATE) {
temp_ps[p++] = temp_msg->radius.attr_pos[n];
} else {
temp_msg->radius.attr_pos[new_n++] = temp_msg->radius.attr_pos[n];
}
}
temp_msg->radius.attr_used = new_n; /* hide the proxy-state to other modules */
temp_msg->ps_first = new_n;
/* And back into the array */
memcpy(temp_msg->radius.attr_pos + new_n, temp_ps, p * sizeof(size_t));
free(temp_ps);
}
*msg = temp_msg;
return 0;
}
static void ieee802_1x_encapsulate_radius(struct wpa_supplicant *wpa_s,
u8 *eap, size_t len)
{
struct radius_msg *msg;
char buf[128];
struct wpa_ssid *ssid = wpa_s->current_ssid;
u8 *identity;
size_t identity_len;
wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
"packet");
wpa_s->radius_identifier = radius_client_get_id(wpa_s);
msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
wpa_s->radius_identifier);
if (msg == NULL) {
printf("Could not create net RADIUS packet\n");
return;
}
radius_msg_make_authenticator(msg, (u8 *) wpa_s, sizeof(*wpa_s));
if (ssid->anonymous_identity) {
identity = ssid->anonymous_identity;
identity_len = ssid->anonymous_identity_len;
} else {
identity = ssid->identity;
identity_len = ssid->identity_len;
}
if (identity &&
!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
identity, identity_len)) {
printf("Could not add User-Name\n");
goto fail;
}
if (!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
(u8 *) &wpa_s->own_ip_addr, 4)) {
printf("Could not add NAS-IP-Address\n");
goto fail;
}
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(wpa_s->own_addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
buf, strlen(buf))) {
printf("Could not add Calling-Station-Id\n");
goto fail;
}
/* TODO: should probably check MTU from driver config; 2304 is max for
* IEEE 802.11, but use 1400 to avoid problems with too large packets
*/
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
printf("Could not add Framed-MTU\n");
goto fail;
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
printf("Could not add NAS-Port-Type\n");
goto fail;
}
snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
buf, strlen(buf))) {
printf("Could not add Connect-Info\n");
goto fail;
}
if (eap && !radius_msg_add_eap(msg, eap, len)) {
printf("Could not add EAP-Message\n");
goto fail;
}
/* State attribute must be copied if and only if this packet is
* Access-Request reply to the previous Access-Challenge */
if (wpa_s->last_recv_radius && wpa_s->last_recv_radius->hdr->code ==
RADIUS_CODE_ACCESS_CHALLENGE) {
int res = radius_msg_copy_attr(msg, wpa_s->last_recv_radius,
RADIUS_ATTR_STATE);
if (res < 0) {
printf("Could not copy State attribute from previous "
"Access-Challenge\n");
goto fail;
}
if (res > 0) {
wpa_printf(MSG_DEBUG, " Copied RADIUS State "
"Attribute");
}
}
radius_client_send(wpa_s, msg, RADIUS_AUTH, wpa_s->own_addr);
return;
fail:
radius_msg_free(msg);
free(msg);
}
static void accounting_sta_report(struct hostapd_data *hapd,
struct sta_info *sta, int stop)
{
struct radius_msg *msg;
int cause = sta->acct_terminate_cause;
struct hostap_sta_driver_data data;
struct os_reltime now_r, diff;
struct os_time now;
u32 gigawords;
if (!hapd->conf->radius->acct_server)
return;
msg = accounting_msg(hapd, sta,
stop ? RADIUS_ACCT_STATUS_TYPE_STOP :
RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE);
if (!msg) {
wpa_printf(MSG_INFO, "Could not create RADIUS Accounting message");
return;
}
os_get_reltime(&now_r);
os_get_time(&now);
os_reltime_sub(&now_r, &sta->acct_session_start, &diff);
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
diff.sec)) {
wpa_printf(MSG_INFO, "Could not add Acct-Session-Time");
goto fail;
}
if (accounting_sta_update_stats(hapd, sta, &data) == 0) {
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_INPUT_PACKETS,
data.rx_packets)) {
wpa_printf(MSG_INFO, "Could not add Acct-Input-Packets");
goto fail;
}
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_OUTPUT_PACKETS,
data.tx_packets)) {
wpa_printf(MSG_INFO, "Could not add Acct-Output-Packets");
goto fail;
}
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_INPUT_OCTETS,
data.rx_bytes)) {
wpa_printf(MSG_INFO, "Could not add Acct-Input-Octets");
goto fail;
}
gigawords = sta->acct_input_gigawords;
#if __WORDSIZE == 64
gigawords += data.rx_bytes >> 32;
#endif
if (gigawords &&
!radius_msg_add_attr_int32(
msg, RADIUS_ATTR_ACCT_INPUT_GIGAWORDS,
gigawords)) {
wpa_printf(MSG_INFO, "Could not add Acct-Input-Gigawords");
goto fail;
}
if (!radius_msg_add_attr_int32(msg,
RADIUS_ATTR_ACCT_OUTPUT_OCTETS,
data.tx_bytes)) {
wpa_printf(MSG_INFO, "Could not add Acct-Output-Octets");
goto fail;
}
gigawords = sta->acct_output_gigawords;
#if __WORDSIZE == 64
gigawords += data.tx_bytes >> 32;
#endif
if (gigawords &&
!radius_msg_add_attr_int32(
msg, RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS,
gigawords)) {
wpa_printf(MSG_INFO, "Could not add Acct-Output-Gigawords");
goto fail;
}
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
now.sec)) {
wpa_printf(MSG_INFO, "Could not add Event-Timestamp");
goto fail;
}
if (eloop_terminated())
cause = RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT;
if (stop && cause &&
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
cause)) {
wpa_printf(MSG_INFO, "Could not add Acct-Terminate-Cause");
goto fail;
}
if (radius_client_send(hapd->radius, msg,
stop ? RADIUS_ACCT : RADIUS_ACCT_INTERIM,
sta->addr) < 0)
goto fail;
return;
fail:
radius_msg_free(msg);
}
/* Process the RADIUS frames from Authentication Server */
static RadiusRxResult
ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
u8 *shared_secret, size_t shared_secret_len,
void *data)
{
struct eapol_test_data *e = data;
/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
* present when packet contains an EAP-Message attribute */
if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
0) < 0 &&
radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
wpa_printf(MSG_DEBUG, "Allowing RADIUS "
"Access-Reject without Message-Authenticator "
"since it does not include EAP-Message\n");
} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
req, 1)) {
printf("Incoming RADIUS packet did not have correct "
"Message-Authenticator - dropped\n");
return RADIUS_RX_UNKNOWN;
}
if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
printf("Unknown RADIUS message code\n");
return RADIUS_RX_UNKNOWN;
}
e->radius_identifier = -1;
wpa_printf(MSG_DEBUG, "RADIUS packet matching with station");
if (e->last_recv_radius) {
radius_msg_free(e->last_recv_radius);
os_free(e->last_recv_radius);
}
e->last_recv_radius = msg;
switch (msg->hdr->code) {
case RADIUS_CODE_ACCESS_ACCEPT:
e->radius_access_accept_received = 1;
ieee802_1x_get_keys(e, msg, req, shared_secret,
shared_secret_len);
break;
case RADIUS_CODE_ACCESS_REJECT:
e->radius_access_reject_received = 1;
break;
}
ieee802_1x_decapsulate_radius(e);
if ((msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
e->eapol_test_num_reauths < 0) ||
msg->hdr->code == RADIUS_CODE_ACCESS_REJECT) {
eloop_terminate();
}
return RADIUS_RX_QUEUED;
}
static struct radius_msg * accounting_msg(struct hostapd_data *hapd,
struct sta_info *sta,
int status_type)
{
struct radius_msg *msg;
char buf[128];
u8 *val;
size_t len;
int i;
struct wpabuf *b;
msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
radius_client_get_id(hapd->radius));
if (msg == NULL) {
wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
return NULL;
}
if (sta) {
radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
os_snprintf(buf, sizeof(buf), "%08X-%08X",
sta->acct_session_id_hi, sta->acct_session_id_lo);
if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
(u8 *) buf, os_strlen(buf))) {
wpa_printf(MSG_INFO, "Could not add Acct-Session-Id");
goto fail;
}
} else {
radius_msg_make_authenticator(msg, (u8 *) hapd, sizeof(*hapd));
}
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
status_type)) {
wpa_printf(MSG_INFO, "Could not add Acct-Status-Type");
goto fail;
}
if (!hostapd_config_get_radius_attr(hapd->conf->radius_acct_req_attr,
RADIUS_ATTR_ACCT_AUTHENTIC) &&
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
hapd->conf->ieee802_1x ?
RADIUS_ACCT_AUTHENTIC_RADIUS :
RADIUS_ACCT_AUTHENTIC_LOCAL)) {
wpa_printf(MSG_INFO, "Could not add Acct-Authentic");
goto fail;
}
if (sta) {
/* Use 802.1X identity if available */
val = ieee802_1x_get_identity(sta->eapol_sm, &len);
/* Use RADIUS ACL identity if 802.1X provides no identity */
if (!val && sta->identity) {
val = (u8 *) sta->identity;
len = os_strlen(sta->identity);
}
/* Use STA MAC if neither 802.1X nor RADIUS ACL provided
* identity */
if (!val) {
os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
MAC2STR(sta->addr));
val = (u8 *) buf;
len = os_strlen(buf);
}
if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
len)) {
wpa_printf(MSG_INFO, "Could not add User-Name");
goto fail;
}
}
if (add_common_radius_attr(hapd, hapd->conf->radius_acct_req_attr, sta,
msg) < 0)
goto fail;
if (sta) {
for (i = 0; ; i++) {
val = ieee802_1x_get_radius_class(sta->eapol_sm, &len,
i);
if (val == NULL)
break;
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS,
val, len)) {
wpa_printf(MSG_INFO, "Could not add Class");
goto fail;
}
}
b = ieee802_1x_get_radius_cui(sta->eapol_sm);
if (b &&
!radius_msg_add_attr(msg,
RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
wpabuf_head(b), wpabuf_len(b))) {
wpa_printf(MSG_ERROR, "Could not add CUI");
goto fail;
}
if (!b && sta->radius_cui &&
!radius_msg_add_attr(msg,
RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
(u8 *) sta->radius_cui,
os_strlen(sta->radius_cui))) {
wpa_printf(MSG_ERROR, "Could not add CUI from ACL");
goto fail;
}
}
return msg;
fail:
radius_msg_free(msg);
return NULL;
}
static void ieee802_1x_encapsulate_radius(struct eapol_test_data *e,
const u8 *eap, size_t len)
{
struct radius_msg *msg;
char buf[128];
const struct eap_hdr *hdr;
const u8 *pos;
wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
"packet");
e->radius_identifier = radius_client_get_id(e->radius);
msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
e->radius_identifier);
if (msg == NULL) {
printf("Could not create net RADIUS packet\n");
return;
}
radius_msg_make_authenticator(msg, (u8 *) e, sizeof(*e));
hdr = (const struct eap_hdr *) eap;
pos = (const u8 *) (hdr + 1);
if (len > sizeof(*hdr) && hdr->code == EAP_CODE_RESPONSE &&
pos[0] == EAP_TYPE_IDENTITY) {
pos++;
os_free(e->eap_identity);
e->eap_identity_len = len - sizeof(*hdr) - 1;
e->eap_identity = os_malloc(e->eap_identity_len);
if (e->eap_identity) {
os_memcpy(e->eap_identity, pos, e->eap_identity_len);
wpa_hexdump(MSG_DEBUG, "Learned identity from "
"EAP-Response-Identity",
e->eap_identity, e->eap_identity_len);
}
}
if (e->eap_identity &&
!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
e->eap_identity, e->eap_identity_len)) {
printf("Could not add User-Name\n");
goto fail;
}
if (!find_extra_attr(e->extra_attrs, RADIUS_ATTR_NAS_IP_ADDRESS) &&
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
(u8 *) &e->own_ip_addr, 4)) {
printf("Could not add NAS-IP-Address\n");
goto fail;
}
os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(e->wpa_s->own_addr));
if (!find_extra_attr(e->extra_attrs, RADIUS_ATTR_CALLING_STATION_ID)
&&
!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
(u8 *) buf, os_strlen(buf))) {
printf("Could not add Calling-Station-Id\n");
goto fail;
}
/* TODO: should probably check MTU from driver config; 2304 is max for
* IEEE 802.11, but use 1400 to avoid problems with too large packets
*/
if (!find_extra_attr(e->extra_attrs, RADIUS_ATTR_FRAMED_MTU) &&
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
printf("Could not add Framed-MTU\n");
goto fail;
}
if (!find_extra_attr(e->extra_attrs, RADIUS_ATTR_NAS_PORT_TYPE) &&
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
printf("Could not add NAS-Port-Type\n");
goto fail;
}
os_snprintf(buf, sizeof(buf), "%s", e->connect_info);
if (!find_extra_attr(e->extra_attrs, RADIUS_ATTR_CONNECT_INFO) &&
!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
(u8 *) buf, os_strlen(buf))) {
printf("Could not add Connect-Info\n");
goto fail;
}
if (add_extra_attrs(msg, e->extra_attrs) < 0)
goto fail;
if (eap && !radius_msg_add_eap(msg, eap, len)) {
printf("Could not add EAP-Message\n");
goto fail;
}
/* State attribute must be copied if and only if this packet is
* Access-Request reply to the previous Access-Challenge */
if (e->last_recv_radius &&
radius_msg_get_hdr(e->last_recv_radius)->code ==
RADIUS_CODE_ACCESS_CHALLENGE) {
int res = radius_msg_copy_attr(msg, e->last_recv_radius,
RADIUS_ATTR_STATE);
if (res < 0) {
printf("Could not copy State attribute from previous "
"Access-Challenge\n");
goto fail;
}
if (res > 0) {
wpa_printf(MSG_DEBUG, " Copied RADIUS State "
"Attribute");
}
}
radius_client_send(e->radius, msg, RADIUS_AUTH, e->wpa_s->own_addr);
return;
fail:
radius_msg_free(msg);
}
static void radius_das_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
struct radius_das_data *das = eloop_ctx;
u8 buf[1500];
union {
struct sockaddr_storage ss;
struct sockaddr_in sin;
#ifdef CONFIG_IPV6
struct sockaddr_in6 sin6;
#endif /* CONFIG_IPV6 */
} from;
char abuf[50];
int from_port = 0;
socklen_t fromlen;
int len;
struct radius_msg *msg, *reply = NULL;
struct radius_hdr *hdr;
struct wpabuf *rbuf;
u32 val;
int res;
struct os_time now;
fromlen = sizeof(from);
len = recvfrom(sock, buf, sizeof(buf), 0,
(struct sockaddr *) &from.ss, &fromlen);
if (len < 0) {
wpa_printf(MSG_ERROR, "DAS: recvfrom: %s", strerror(errno));
return;
}
os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
from_port = ntohs(from.sin.sin_port);
wpa_printf(MSG_DEBUG, "DAS: Received %d bytes from %s:%d",
len, abuf, from_port);
if (das->client_addr.u.v4.s_addr != from.sin.sin_addr.s_addr) {
wpa_printf(MSG_DEBUG, "DAS: Drop message from unknown client");
return;
}
msg = radius_msg_parse(buf, len);
if (msg == NULL) {
wpa_printf(MSG_DEBUG, "DAS: Parsing incoming RADIUS packet "
"from %s:%d failed", abuf, from_port);
return;
}
if (wpa_debug_level <= MSG_MSGDUMP)
radius_msg_dump(msg);
if (radius_msg_verify_das_req(msg, das->shared_secret,
das->shared_secret_len)) {
wpa_printf(MSG_DEBUG, "DAS: Invalid authenticator in packet "
"from %s:%d - drop", abuf, from_port);
goto fail;
}
os_get_time(&now);
res = radius_msg_get_attr(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
(u8 *) &val, 4);
if (res == 4) {
u32 timestamp = ntohl(val);
if ((unsigned int) abs((int) (now.sec - timestamp)) >
das->time_window) {
wpa_printf(MSG_DEBUG, "DAS: Unacceptable "
"Event-Timestamp (%u; local time %u) in "
"packet from %s:%d - drop",
timestamp, (unsigned int) now.sec,
abuf, from_port);
goto fail;
}
} else if (das->require_event_timestamp) {
wpa_printf(MSG_DEBUG, "DAS: Missing Event-Timestamp in packet "
"from %s:%d - drop", abuf, from_port);
goto fail;
}
hdr = radius_msg_get_hdr(msg);
switch (hdr->code) {
case RADIUS_CODE_DISCONNECT_REQUEST:
reply = radius_das_disconnect(das, msg, abuf, from_port);
break;
case RADIUS_CODE_COA_REQUEST:
/* TODO */
reply = radius_msg_new(RADIUS_CODE_COA_NAK,
hdr->identifier);
if (reply == NULL)
break;
/* Unsupported Service */
if (!radius_msg_add_attr_int32(reply, RADIUS_ATTR_ERROR_CAUSE,
405)) {
radius_msg_free(reply);
reply = NULL;
break;
}
break;
default:
wpa_printf(MSG_DEBUG, "DAS: Unexpected RADIUS code %u in "
"packet from %s:%d",
hdr->code, abuf, from_port);
}
if (reply) {
wpa_printf(MSG_DEBUG, "DAS: Reply to %s:%d", abuf, from_port);
if (!radius_msg_add_attr_int32(reply,
RADIUS_ATTR_EVENT_TIMESTAMP,
now.sec)) {
wpa_printf(MSG_DEBUG, "DAS: Failed to add "
"Event-Timestamp attribute");
}
if (radius_msg_finish_das_resp(reply, das->shared_secret,
das->shared_secret_len, hdr) <
0) {
wpa_printf(MSG_DEBUG, "DAS: Failed to add "
"Message-Authenticator attribute");
}
if (wpa_debug_level <= MSG_MSGDUMP)
radius_msg_dump(reply);
rbuf = radius_msg_get_buf(reply);
res = sendto(das->sock, wpabuf_head(rbuf),
wpabuf_len(rbuf), 0,
(struct sockaddr *) &from.ss, fromlen);
if (res < 0) {
wpa_printf(MSG_ERROR, "DAS: sendto(to %s:%d): %s",
abuf, from_port, strerror(errno));
}
}
fail:
radius_msg_free(msg);
radius_msg_free(reply);
}
static void radius_client_msg_free(struct radius_msg_list *req)
{
radius_msg_free(req->msg);
os_free(req);
}
static struct radius_msg * radius_das_disconnect(struct radius_das_data *das,
struct radius_msg *msg,
const char *abuf,
int from_port)
{
struct radius_hdr *hdr;
struct radius_msg *reply;
u8 allowed[] = {
RADIUS_ATTR_USER_NAME,
RADIUS_ATTR_NAS_IP_ADDRESS,
RADIUS_ATTR_CALLING_STATION_ID,
RADIUS_ATTR_NAS_IDENTIFIER,
RADIUS_ATTR_ACCT_SESSION_ID,
RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
RADIUS_ATTR_EVENT_TIMESTAMP,
RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
#ifdef CONFIG_IPV6
RADIUS_ATTR_NAS_IPV6_ADDRESS,
#endif /* CONFIG_IPV6 */
0
};
int error = 405;
u8 attr;
enum radius_das_res res;
struct radius_das_attrs attrs;
u8 *buf;
size_t len;
char tmp[100];
u8 sta_addr[ETH_ALEN];
hdr = radius_msg_get_hdr(msg);
attr = radius_msg_find_unlisted_attr(msg, allowed);
if (attr) {
wpa_printf(MSG_INFO, "DAS: Unsupported attribute %u in "
"Disconnect-Request from %s:%d", attr,
abuf, from_port);
error = 401;
goto fail;
}
os_memset(&attrs, 0, sizeof(attrs));
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
&buf, &len, NULL) == 0) {
if (len != 4) {
wpa_printf(MSG_INFO, "DAS: Invalid NAS-IP-Address from %s:%d",
abuf, from_port);
error = 407;
goto fail;
}
attrs.nas_ip_addr = buf;
}
#ifdef CONFIG_IPV6
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
&buf, &len, NULL) == 0) {
if (len != 16) {
wpa_printf(MSG_INFO, "DAS: Invalid NAS-IPv6-Address from %s:%d",
abuf, from_port);
error = 407;
goto fail;
}
attrs.nas_ipv6_addr = buf;
}
#endif /* CONFIG_IPV6 */
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
&buf, &len, NULL) == 0) {
attrs.nas_identifier = buf;
attrs.nas_identifier_len = len;
}
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CALLING_STATION_ID,
&buf, &len, NULL) == 0) {
if (len >= sizeof(tmp))
len = sizeof(tmp) - 1;
os_memcpy(tmp, buf, len);
tmp[len] = '\0';
if (hwaddr_aton2(tmp, sta_addr) < 0) {
wpa_printf(MSG_INFO, "DAS: Invalid Calling-Station-Id "
"'%s' from %s:%d", tmp, abuf, from_port);
error = 407;
goto fail;
}
attrs.sta_addr = sta_addr;
}
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME,
&buf, &len, NULL) == 0) {
attrs.user_name = buf;
attrs.user_name_len = len;
}
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
&buf, &len, NULL) == 0) {
attrs.acct_session_id = buf;
attrs.acct_session_id_len = len;
}
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
&buf, &len, NULL) == 0) {
attrs.acct_multi_session_id = buf;
attrs.acct_multi_session_id_len = len;
}
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
&buf, &len, NULL) == 0) {
attrs.cui = buf;
attrs.cui_len = len;
}
res = das->disconnect(das->ctx, &attrs);
switch (res) {
case RADIUS_DAS_NAS_MISMATCH:
wpa_printf(MSG_INFO, "DAS: NAS mismatch from %s:%d",
abuf, from_port);
error = 403;
break;
case RADIUS_DAS_SESSION_NOT_FOUND:
wpa_printf(MSG_INFO, "DAS: Session not found for request from "
"%s:%d", abuf, from_port);
error = 503;
break;
case RADIUS_DAS_MULTI_SESSION_MATCH:
wpa_printf(MSG_INFO,
"DAS: Multiple sessions match for request from %s:%d",
abuf, from_port);
error = 508;
break;
case RADIUS_DAS_SUCCESS:
error = 0;
break;
}
fail:
reply = radius_msg_new(error ? RADIUS_CODE_DISCONNECT_NAK :
RADIUS_CODE_DISCONNECT_ACK, hdr->identifier);
if (reply == NULL)
return NULL;
if (error) {
if (!radius_msg_add_attr_int32(reply, RADIUS_ATTR_ERROR_CAUSE,
error)) {
radius_msg_free(reply);
return NULL;
}
}
return reply;
}
struct radius_msg *radius_msg_parse(const u8 *data, size_t len)
{
struct radius_msg *msg;
struct radius_hdr *hdr;
struct radius_attr_hdr *attr;
size_t msg_len;
unsigned char *pos, *end;
if (data == NULL || len < sizeof(*hdr))
return NULL;
hdr = (struct radius_hdr *) data;
msg_len = ntohs(hdr->length);
if (msg_len < sizeof(*hdr) || msg_len > len) {
printf("Invalid RADIUS message length\n");
return NULL;
}
if (msg_len < len) {
printf("Ignored %lu extra bytes after RADIUS message\n",
(unsigned long) len - msg_len);
}
msg = os_malloc(sizeof(*msg));
if (msg == NULL)
return NULL;
if (radius_msg_initialize(msg, msg_len)) {
os_free(msg);
return NULL;
}
os_memcpy(msg->buf, data, msg_len);
msg->buf_size = msg->buf_used = msg_len;
/* parse attributes */
pos = (unsigned char *) (msg->hdr + 1);
end = msg->buf + msg->buf_used;
while (pos < end) {
if ((size_t) (end - pos) < sizeof(*attr))
goto fail;
attr = (struct radius_attr_hdr *) pos;
if (pos + attr->length > end || attr->length < sizeof(*attr))
goto fail;
/* TODO: check that attr->length is suitable for attr->type */
if (radius_msg_add_attr_to_array(msg, attr))
goto fail;
pos += attr->length;
}
return msg;
fail:
radius_msg_free(msg);
os_free(msg);
return NULL;
}
static int radius_server_request(struct radius_server_data *data,
struct radius_msg *msg,
struct sockaddr_in *from,
struct radius_client *client)
{
u8 *eap = NULL;
size_t eap_len;
int res, state_included;
u8 statebuf[4], resp_id;
unsigned int state;
struct radius_session *sess;
struct radius_msg *reply;
struct eap_hdr *hdr;
/* TODO: Implement duplicate packet processing */
res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
sizeof(statebuf));
state_included = res >= 0;
if (res == sizeof(statebuf)) {
state = (statebuf[0] << 24) | (statebuf[1] << 16) |
(statebuf[2] << 8) | statebuf[3];
sess = radius_server_get_session(client, state);
} else {
sess = NULL;
}
if (sess) {
RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
} else if (state_included) {
RADIUS_DEBUG("State attribute included but no session found");
radius_server_reject(data, client, msg, from);
return -1;
} else {
sess = radius_server_get_new_session(data, client, msg);
if (sess == NULL) {
RADIUS_DEBUG("Could not create a new session");
return -1;
}
}
eap = radius_msg_get_eap(msg, &eap_len);
if (eap == NULL) {
RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
inet_ntoa(from->sin_addr));
return -1;
}
RADIUS_DUMP("Received EAP data", eap, eap_len);
if (eap_len >= sizeof(*hdr)) {
hdr = (struct eap_hdr *) eap;
resp_id = hdr->identifier;
} else {
resp_id = 0;
}
eap_set_eapRespData(sess->eap, eap, eap_len);
free(eap);
eap = NULL;
sess->eapResp = TRUE;
eap_sm_step(sess->eap);
if (sess->eapReqData) {
RADIUS_DUMP("EAP data from the state machine",
sess->eapReqData, sess->eapReqDataLen);
} else if (sess->eapFail) {
RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
"set - generate EAP-Failure");
hdr = malloc(sizeof(*hdr));
if (hdr) {
memset(hdr, 0, sizeof(*hdr));
hdr->identifier = resp_id;
hdr->length = htons(sizeof(*hdr));
sess->eapReqData = (u8 *) hdr;
sess->eapReqDataLen = sizeof(*hdr);
}
} else {
RADIUS_DEBUG("No EAP data from the state machine - ignore this"
" Access-Request silently (assuming it was a "
"duplicate)");
return -1;
}
reply = radius_server_encapsulate_eap(data, client, sess, msg);
free(sess->eapReqData);
sess->eapReqData = NULL;
sess->eapReqDataLen = 0;
if (reply) {
RADIUS_DEBUG("Reply to %s:%d", inet_ntoa(from->sin_addr),
ntohs(from->sin_port));
if (wpa_debug_level <= MSG_MSGDUMP) {
radius_msg_dump(reply);
}
res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0,
(struct sockaddr *) from, sizeof(*from));
if (res < 0) {
perror("sendto[RADIUS SRV]");
}
radius_msg_free(reply);
free(reply);
}
if (sess->eapSuccess || sess->eapFail) {
RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
radius_server_session_remove(data, sess);
}
return 0;
}
