static void radius_client_list_del(struct radius_client_data *radius,
RadiusType msg_type, u8 *addr)
{
struct hostapd_data *hapd = radius->hapd;
struct radius_msg_list *entry, *prev, *tmp;
if (addr == NULL)
return;
entry = radius->msgs;
prev = NULL;
while (entry) {
if (entry->msg_type == msg_type &&
memcmp(entry->addr, addr, ETH_ALEN) == 0) {
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
"Removing matching RADIUS message for "
MACSTR "\n", MAC2STR(addr));
radius_client_msg_free(tmp);
radius->num_msgs--;
continue;
}
prev = entry;
entry = entry->next;
}
}
/**
* radius_client_flush - Flush all pending RADIUS client messages
* @radius: RADIUS client context from radius_client_init()
* @only_auth: Whether only authentication messages are removed
*/
void radius_client_flush(struct radius_client_data *radius, int only_auth)
{
struct radius_msg_list *entry, *prev, *tmp;
if (!radius)
return;
prev = NULL;
entry = radius->msgs;
while (entry) {
if (!only_auth || entry->msg_type == RADIUS_AUTH) {
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
radius_client_msg_free(tmp);
radius->num_msgs--;
} else {
prev = entry;
entry = entry->next;
}
}
if (radius->msgs == NULL)
eloop_cancel_timeout(radius_client_timer, radius, NULL);
}
/**
* radius_client_get_id - Get an identifier for a new RADIUS message
* @radius: RADIUS client context from radius_client_init()
* Returns: Allocated identifier
*
* This function is used to fetch a unique (among pending requests) identifier
* for a new RADIUS message.
*/
u8 radius_client_get_id(struct radius_client_data *radius)
{
struct radius_msg_list *entry, *prev, *_remove;
u8 id = radius->next_radius_identifier++;
/* remove entries with matching id from retransmit list to avoid
* using new reply from the RADIUS server with an old request */
entry = radius->msgs;
prev = NULL;
while (entry) {
if (radius_msg_get_hdr(entry->msg)->identifier == id) {
hostapd_logger(radius->ctx, entry->addr,
HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG,
"Removing pending RADIUS message, "
"since its id (%d) is reused", id);
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
_remove = entry;
} else {
_remove = NULL;
prev = entry;
}
entry = entry->next;
if (_remove)
radius_client_msg_free(_remove);
}
return id;
}
static void radius_client_list_del(struct radius_client_data *radius,
RadiusType msg_type, const u8 *addr)
{
struct radius_msg_list *entry, *prev, *tmp;
if (addr == NULL)
return;
entry = radius->msgs;
prev = NULL;
while (entry) {
if (entry->msg_type == msg_type &&
os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
hostapd_logger(radius->ctx, addr,
HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG,
"Removing matching RADIUS message");
radius_client_msg_free(tmp);
radius->num_msgs--;
continue;
}
prev = entry;
entry = entry->next;
}
}
/**
* radius_client_flush_auth - Flush pending RADIUS messages for an address
* @radius: RADIUS client context from radius_client_init()
* @addr: MAC address of the related device
*
* This function can be used to remove pending RADIUS authentication messages
* that are related to a specific device. The addr parameter is matched with
* the one used in radius_client_send() call that was used to transmit the
* authentication request.
*/
void radius_client_flush_auth(struct radius_client_data *radius,
const u8 *addr)
{
struct radius_msg_list *entry, *prev, *tmp;
prev = NULL;
entry = radius->msgs;
while (entry) {
if (entry->msg_type == RADIUS_AUTH &&
os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
hostapd_logger(radius->ctx, addr,
HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG,
"Removing pending RADIUS authentication"
" message for removed client");
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
radius_client_msg_free(tmp);
radius->num_msgs--;
continue;
}
prev = entry;
entry = entry->next;
}
}
u8 radius_client_get_id(struct radius_client_data *radius)
{
struct hostapd_data *hapd = radius->hapd;
struct radius_msg_list *entry, *prev, *remove;
u8 id = radius->next_radius_identifier++;
/* remove entries with matching id from retransmit list to avoid
* using new reply from the RADIUS server with an old request */
entry = radius->msgs;
prev = NULL;
while (entry) {
if (entry->msg->hdr->identifier == id) {
HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
"Removing pending RADIUS message, since "
"its id (%d) is reused\n", id);
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
remove = entry;
} else
remove = NULL;
prev = entry;
entry = entry->next;
if (remove)
radius_client_msg_free(remove);
}
return id;
}
static void radius_client_list_add(struct radius_client_data *radius,
struct radius_msg *msg,
RadiusType msg_type, u8 *shared_secret,
size_t shared_secret_len, u8 *addr)
{
struct radius_msg_list *entry, *prev;
if (eloop_terminated()) {
/* No point in adding entries to retransmit queue since event
* loop has already been terminated. */
radius_msg_free(msg);
free(msg);
return;
}
entry = malloc(sizeof(*entry));
if (entry == NULL) {
wpa_printf(MSG_ERROR,
"Failed to add RADIUS packet into retransmit list\n");
radius_msg_free(msg);
free(msg);
return;
}
memset(entry, 0, sizeof(*entry));
if (addr)
memcpy(entry->addr, addr, ETH_ALEN);
entry->msg = msg;
entry->msg_type = msg_type;
entry->shared_secret = shared_secret;
entry->shared_secret_len = shared_secret_len;
time(&entry->first_try);
entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
entry->attempts = 1;
gettimeofday(&entry->last_attempt, NULL);
entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
entry->next = radius->msgs;
radius->msgs = entry;
radius_client_update_timeout(radius);
if (radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
wpa_printf(MSG_ERROR,
"Removing the oldest un-ACKed RADIUS packet due to "
"retransmit list limits.\n");
prev = NULL;
while (entry->next) {
prev = entry;
entry = entry->next;
}
if (prev) {
prev->next = NULL;
radius_client_msg_free(entry);
}
} else
radius->num_msgs++;
}
static void radius_client_list_add(hostapd *hapd, struct radius_msg *msg,
RadiusType msg_type, u8 *shared_secret,
size_t shared_secret_len)
{
struct radius_msg_list *entry, *prev;
if (eloop_terminated()) {
/* No point in adding entries to retransmit queue since event
* loop has already been terminated. */
radius_msg_free(msg);
free(msg);
return;
}
entry = malloc(sizeof(*entry));
if (entry == NULL) {
printf("Failed to add RADIUS packet into retransmit list\n");
radius_msg_free(msg);
free(msg);
return;
}
memset(entry, 0, sizeof(*entry));
entry->msg = msg;
entry->msg_type = msg_type;
entry->shared_secret = shared_secret;
entry->shared_secret_len = shared_secret_len;
time(&entry->first_try);
entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
entry->attempts = 1;
entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
if (!hapd->radius->msgs)
eloop_register_timeout(RADIUS_CLIENT_FIRST_WAIT, 0,
radius_client_timer, hapd, NULL);
entry->next = hapd->radius->msgs;
hapd->radius->msgs = entry;
if (hapd->radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
printf("Removing the oldest un-ACKed RADIUS packet due to "
"retransmit list limits.\n");
prev = NULL;
while (entry->next) {
prev = entry;
entry = entry->next;
}
if (prev) {
prev->next = NULL;
radius_client_msg_free(entry);
}
} else
hapd->radius->num_msgs++;
}
void radius_client_flush(struct radius_client_data *radius)
{
struct radius_msg_list *entry, *prev;
if (!radius)
return;
eloop_cancel_timeout(radius_client_timer, radius, NULL);
entry = radius->msgs;
radius->msgs = NULL;
radius->num_msgs = 0;
while (entry) {
prev = entry;
entry = entry->next;
radius_client_msg_free(prev);
}
}
void radius_client_flush(struct wpa_supplicant *wpa_s)
{
struct radius_msg_list *entry, *prev;
if (!wpa_s->radius)
return;
eloop_cancel_timeout(radius_client_timer, wpa_s, NULL);
entry = wpa_s->radius->msgs;
wpa_s->radius->msgs = NULL;
wpa_s->radius->num_msgs = 0;
while (entry) {
prev = entry;
entry = entry->next;
radius_client_msg_free(prev);
}
}
void radius_client_flush(hostapd *hapd)
{
struct radius_msg_list *entry, *prev;
if (!hapd->radius)
return;
eloop_cancel_timeout(radius_client_timer, hapd, NULL);
entry = hapd->radius->msgs;
hapd->radius->msgs = NULL;
hapd->radius->num_msgs = 0;
while (entry) {
prev = entry;
entry = entry->next;
radius_client_msg_free(prev);
}
}
static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
time_t now, first;
struct radius_msg_list *entry, *prev, *tmp;
int auth_failover = 0, acct_failover = 0;
entry = wpa_s->radius->msgs;
if (!entry)
return;
time(&now);
first = 0;
prev = NULL;
while (entry) {
if (now >= entry->next_try &&
radius_client_retransmit(wpa_s, entry, now)) {
if (prev)
prev->next = entry->next;
else
wpa_s->radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
radius_client_msg_free(tmp);
wpa_s->radius->num_msgs--;
continue;
}
if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
if (entry->msg_type == RADIUS_ACCT ||
entry->msg_type == RADIUS_ACCT_INTERIM)
acct_failover++;
else
auth_failover++;
}
if (first == 0 || entry->next_try < first)
first = entry->next_try;
prev = entry;
entry = entry->next;
}
if (wpa_s->radius->msgs) {
if (first < now)
first = now;
eloop_register_timeout(first - now, 0,
radius_client_timer, wpa_s, NULL);
}
if (auth_failover && wpa_s->num_auth_servers > 1) {
struct hostapd_radius_server *next, *old;
old = wpa_s->auth_server;
hostapd_logger(wpa_s, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_NOTICE,
"No response from Authentication server "
"%s:%d - failover",
inet_ntoa(old->addr), old->port);
next = old + 1;
if (next > &(wpa_s->auth_servers
[wpa_s->num_auth_servers - 1]))
next = wpa_s->auth_servers;
wpa_s->auth_server = next;
radius_change_server(wpa_s, next, old,
wpa_s->radius->auth_serv_sock, 1);
}
if (acct_failover && wpa_s->num_acct_servers > 1) {
struct hostapd_radius_server *next, *old;
old = wpa_s->acct_server;
hostapd_logger(wpa_s, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_NOTICE,
"No response from Accounting server "
"%s:%d - failover",
inet_ntoa(old->addr), old->port);
next = old + 1;
if (next > &wpa_s->acct_servers
[wpa_s->num_acct_servers - 1])
next = wpa_s->acct_servers;
wpa_s->acct_server = next;
radius_change_server(wpa_s, next, old,
wpa_s->radius->acct_serv_sock, 0);
}
}
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);
}
static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
{
struct radius_client_data *radius = eloop_ctx;
struct os_reltime now;
os_time_t first;
struct radius_msg_list *entry, *prev, *tmp;
int auth_failover = 0, acct_failover = 0;
size_t prev_num_msgs;
int s;
entry = radius->msgs;
if (!entry)
return;
os_get_reltime(&now);
first = 0;
prev = NULL;
while (entry) {
prev_num_msgs = radius->num_msgs;
if (now.sec >= entry->next_try &&
radius_client_retransmit(radius, entry, now.sec)) {
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
radius_client_msg_free(tmp);
radius->num_msgs--;
continue;
}
if (prev_num_msgs != radius->num_msgs) {
wpa_printf(MSG_DEBUG,
"RADIUS: Message removed from queue - restart from beginning");
entry = radius->msgs;
prev = NULL;
continue;
}
s = entry->msg_type == RADIUS_AUTH ? radius->auth_sock :
radius->acct_sock;
if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER ||
(s < 0 && entry->attempts > 0)) {
if (entry->msg_type == RADIUS_ACCT ||
entry->msg_type == RADIUS_ACCT_INTERIM)
acct_failover++;
else
auth_failover++;
}
if (first == 0 || entry->next_try < first)
first = entry->next_try;
prev = entry;
entry = entry->next;
}
if (radius->msgs) {
if (first < now.sec)
first = now.sec;
eloop_register_timeout(first - now.sec, 0,
radius_client_timer, radius, NULL);
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
"retransmit in %ld seconds",
(long int) (first - now.sec));
}
if (auth_failover)
radius_client_auth_failover(radius);
if (acct_failover)
radius_client_acct_failover(radius);
}
static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
{
struct radius_client_data *radius = eloop_ctx;
struct hostapd_radius_servers *conf = radius->conf;
struct os_time now;
os_time_t first;
struct radius_msg_list *entry, *prev, *tmp;
int auth_failover = 0, acct_failover = 0;
char abuf[50];
entry = radius->msgs;
if (!entry)
return;
os_get_time(&now);
first = 0;
prev = NULL;
while (entry) {
if (now.sec >= entry->next_try &&
radius_client_retransmit(radius, entry, now.sec)) {
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
radius_client_msg_free(tmp);
radius->num_msgs--;
continue;
}
if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
if (entry->msg_type == RADIUS_ACCT ||
entry->msg_type == RADIUS_ACCT_INTERIM)
acct_failover++;
else
auth_failover++;
}
if (first == 0 || entry->next_try < first)
first = entry->next_try;
prev = entry;
entry = entry->next;
}
if (radius->msgs) {
if (first < now.sec)
first = now.sec;
eloop_register_timeout(first - now.sec, 0,
radius_client_timer, radius, NULL);
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
"retransmit in %ld seconds",
(long int) (first - now.sec));
}
if (auth_failover && conf->num_auth_servers > 1) {
struct hostapd_radius_server *next, *old;
old = conf->auth_server;
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_NOTICE,
"No response from Authentication server "
"%s:%d - failover",
hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
old->port);
for (entry = radius->msgs; entry; entry = entry->next) {
if (entry->msg_type == RADIUS_AUTH)
old->timeouts++;
}
next = old + 1;
if (next > &(conf->auth_servers[conf->num_auth_servers - 1]))
next = conf->auth_servers;
conf->auth_server = next;
radius_change_server(radius, next, old,
radius->auth_serv_sock,
radius->auth_serv_sock6, 1);
}
if (acct_failover && conf->num_acct_servers > 1) {
struct hostapd_radius_server *next, *old;
old = conf->acct_server;
hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_NOTICE,
"No response from Accounting server "
"%s:%d - failover",
hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
old->port);
for (entry = radius->msgs; entry; entry = entry->next) {
if (entry->msg_type == RADIUS_ACCT ||
entry->msg_type == RADIUS_ACCT_INTERIM)
old->timeouts++;
}
next = old + 1;
if (next > &conf->acct_servers[conf->num_acct_servers - 1])
next = conf->acct_servers;
conf->acct_server = next;
radius_change_server(radius, next, old,
radius->acct_serv_sock,
radius->acct_serv_sock6, 0);
}
}
static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
{
struct radius_client_data *radius = eloop_ctx;
struct hostapd_data *hapd = radius->hapd;
time_t now, first;
struct radius_msg_list *entry, *prev, *tmp;
int auth_failover = 0, acct_failover = 0;
entry = radius->msgs;
if (!entry)
return;
time(&now);
first = 0;
prev = NULL;
while (entry) {
if (now >= entry->next_try &&
radius_client_retransmit(radius, entry, now)) {
if (prev)
prev->next = entry->next;
else
radius->msgs = entry->next;
tmp = entry;
entry = entry->next;
radius_client_msg_free(tmp);
radius->num_msgs--;
continue;
}
if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
if (entry->msg_type == RADIUS_ACCT ||
entry->msg_type == RADIUS_ACCT_INTERIM)
acct_failover++;
else
auth_failover++;
}
if (first == 0 || entry->next_try < first)
first = entry->next_try;
prev = entry;
entry = entry->next;
}
if (radius->msgs) {
if (first < now)
first = now;
eloop_register_timeout(first - now, 0,
radius_client_timer, radius, NULL);
HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "Next RADIUS client "
"retransmit in %ld seconds\n",
(long int) (first - now));
}
if (auth_failover && hapd->conf->num_auth_servers > 1) {
struct hostapd_radius_server *next, *old;
old = hapd->conf->auth_server;
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_NOTICE,
"No response from Authentication server "
"%s:%d - failover",
inet_ntoa(old->addr), old->port);
for (entry = radius->msgs; entry; entry = entry->next) {
if (entry->msg_type == RADIUS_AUTH)
old->timeouts++;
}
next = old + 1;
if (next > &(hapd->conf->auth_servers
[hapd->conf->num_auth_servers - 1]))
next = hapd->conf->auth_servers;
hapd->conf->auth_server = next;
radius_change_server(radius, next, old,
radius->auth_serv_sock, 1);
}
if (acct_failover && hapd->conf->num_acct_servers > 1) {
struct hostapd_radius_server *next, *old;
old = hapd->conf->acct_server;
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_RADIUS,
HOSTAPD_LEVEL_NOTICE,
"No response from Accounting server "
"%s:%d - failover",
inet_ntoa(old->addr), old->port);
for (entry = radius->msgs; entry; entry = entry->next) {
if (entry->msg_type == RADIUS_ACCT ||
entry->msg_type == RADIUS_ACCT_INTERIM)
old->timeouts++;
}
next = old + 1;
if (next > &hapd->conf->acct_servers
[hapd->conf->num_acct_servers - 1])
next = hapd->conf->acct_servers;
hapd->conf->acct_server = next;
radius_change_server(radius, next, old,
radius->acct_serv_sock, 0);
}
}
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);
}