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authorJouni Malinen <j@w1.fi>2008-02-28 01:34:43 (GMT)
committerJouni Malinen <jm@jm.kir.nu>2008-02-28 01:34:43 (GMT)
commit6fc6879bd55a394f807cbbe927df736c190cb8ab (patch)
treecdf50da0c58f21510a808d53502a060d911ff243 /src/radius/radius_client.c
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Re-initialize hostapd/wpa_supplicant git repository based on 0.6.3 release
Diffstat (limited to 'src/radius/radius_client.c')
-rw-r--r--src/radius/radius_client.c1219
1 files changed, 1219 insertions, 0 deletions
diff --git a/src/radius/radius_client.c b/src/radius/radius_client.c
new file mode 100644
index 0000000..da9f3cf
--- /dev/null
+++ b/src/radius/radius_client.c
@@ -0,0 +1,1219 @@
+/*
+ * hostapd / RADIUS client
+ * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "radius.h"
+#include "radius_client.h"
+#include "eloop.h"
+
+/* Defaults for RADIUS retransmit values (exponential backoff) */
+#define RADIUS_CLIENT_FIRST_WAIT 3 /* seconds */
+#define RADIUS_CLIENT_MAX_WAIT 120 /* seconds */
+#define RADIUS_CLIENT_MAX_RETRIES 10 /* maximum number of retransmit attempts
+ * before entry is removed from retransmit
+ * list */
+#define RADIUS_CLIENT_MAX_ENTRIES 30 /* maximum number of entries in retransmit
+ * list (oldest will be removed, if this
+ * limit is exceeded) */
+#define RADIUS_CLIENT_NUM_FAILOVER 4 /* try to change RADIUS server after this
+ * many failed retry attempts */
+
+
+struct radius_rx_handler {
+ RadiusRxResult (*handler)(struct radius_msg *msg,
+ struct radius_msg *req,
+ u8 *shared_secret, size_t shared_secret_len,
+ void *data);
+ void *data;
+};
+
+
+/* RADIUS message retransmit list */
+struct radius_msg_list {
+ u8 addr[ETH_ALEN]; /* STA/client address; used to find RADIUS messages
+ * for the same STA. */
+ struct radius_msg *msg;
+ RadiusType msg_type;
+ os_time_t first_try;
+ os_time_t next_try;
+ int attempts;
+ int next_wait;
+ struct os_time last_attempt;
+
+ u8 *shared_secret;
+ size_t shared_secret_len;
+
+ /* TODO: server config with failover to backup server(s) */
+
+ struct radius_msg_list *next;
+};
+
+
+struct radius_client_data {
+ void *ctx;
+ struct hostapd_radius_servers *conf;
+
+ int auth_serv_sock; /* socket for authentication RADIUS messages */
+ int acct_serv_sock; /* socket for accounting RADIUS messages */
+ int auth_serv_sock6;
+ int acct_serv_sock6;
+ int auth_sock; /* currently used socket */
+ int acct_sock; /* currently used socket */
+
+ struct radius_rx_handler *auth_handlers;
+ size_t num_auth_handlers;
+ struct radius_rx_handler *acct_handlers;
+ size_t num_acct_handlers;
+
+ struct radius_msg_list *msgs;
+ size_t num_msgs;
+
+ u8 next_radius_identifier;
+};
+
+
+static int
+radius_change_server(struct radius_client_data *radius,
+ struct hostapd_radius_server *nserv,
+ struct hostapd_radius_server *oserv,
+ int sock, int sock6, int auth);
+static int radius_client_init_acct(struct radius_client_data *radius);
+static int radius_client_init_auth(struct radius_client_data *radius);
+
+
+static void radius_client_msg_free(struct radius_msg_list *req)
+{
+ radius_msg_free(req->msg);
+ os_free(req->msg);
+ os_free(req);
+}
+
+
+int radius_client_register(struct radius_client_data *radius,
+ RadiusType msg_type,
+ RadiusRxResult (*handler)(struct radius_msg *msg,
+ struct radius_msg *req,
+ u8 *shared_secret,
+ size_t shared_secret_len,
+ void *data),
+ void *data)
+{
+ struct radius_rx_handler **handlers, *newh;
+ size_t *num;
+
+ if (msg_type == RADIUS_ACCT) {
+ handlers = &radius->acct_handlers;
+ num = &radius->num_acct_handlers;
+ } else {
+ handlers = &radius->auth_handlers;
+ num = &radius->num_auth_handlers;
+ }
+
+ newh = os_realloc(*handlers,
+ (*num + 1) * sizeof(struct radius_rx_handler));
+ if (newh == NULL)
+ return -1;
+
+ newh[*num].handler = handler;
+ newh[*num].data = data;
+ (*num)++;
+ *handlers = newh;
+
+ return 0;
+}
+
+
+static void radius_client_handle_send_error(struct radius_client_data *radius,
+ int s, RadiusType msg_type)
+{
+#ifndef CONFIG_NATIVE_WINDOWS
+ int _errno = errno;
+ perror("send[RADIUS]");
+ if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL ||
+ _errno == EBADF) {
+ hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_INFO,
+ "Send failed - maybe interface status changed -"
+ " try to connect again");
+ eloop_unregister_read_sock(s);
+ close(s);
+ if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM)
+ radius_client_init_acct(radius);
+ else
+ radius_client_init_auth(radius);
+ }
+#endif /* CONFIG_NATIVE_WINDOWS */
+}
+
+
+static int radius_client_retransmit(struct radius_client_data *radius,
+ struct radius_msg_list *entry,
+ os_time_t now)
+{
+ struct hostapd_radius_servers *conf = radius->conf;
+ int s;
+
+ if (entry->msg_type == RADIUS_ACCT ||
+ entry->msg_type == RADIUS_ACCT_INTERIM) {
+ s = radius->acct_sock;
+ if (entry->attempts == 0)
+ conf->acct_server->requests++;
+ else {
+ conf->acct_server->timeouts++;
+ conf->acct_server->retransmissions++;
+ }
+ } else {
+ s = radius->auth_sock;
+ if (entry->attempts == 0)
+ conf->auth_server->requests++;
+ else {
+ conf->auth_server->timeouts++;
+ conf->auth_server->retransmissions++;
+ }
+ }
+
+ /* retransmit; remove entry if too many attempts */
+ entry->attempts++;
+ hostapd_logger(radius->ctx, entry->addr, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_DEBUG, "Resending RADIUS message (id=%d)",
+ entry->msg->hdr->identifier);
+
+ os_get_time(&entry->last_attempt);
+ if (send(s, entry->msg->buf, entry->msg->buf_used, 0) < 0)
+ radius_client_handle_send_error(radius, s, entry->msg_type);
+
+ entry->next_try = now + entry->next_wait;
+ entry->next_wait *= 2;
+ if (entry->next_wait > RADIUS_CLIENT_MAX_WAIT)
+ entry->next_wait = RADIUS_CLIENT_MAX_WAIT;
+ if (entry->attempts >= RADIUS_CLIENT_MAX_RETRIES) {
+ printf("Removing un-ACKed RADIUS message due to too many "
+ "failed retransmit attempts\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+
+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_update_timeout(struct radius_client_data *radius)
+{
+ struct os_time now;
+ os_time_t first;
+ struct radius_msg_list *entry;
+
+ eloop_cancel_timeout(radius_client_timer, radius, NULL);
+
+ if (radius->msgs == NULL) {
+ return;
+ }
+
+ first = 0;
+ for (entry = radius->msgs; entry; entry = entry->next) {
+ if (first == 0 || entry->next_try < first)
+ first = entry->next_try;
+ }
+
+ os_get_time(&now);
+ 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\n", (long int) (first - now.sec));
+}
+
+
+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, const 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);
+ os_free(msg);
+ return;
+ }
+
+ entry = os_zalloc(sizeof(*entry));
+ if (entry == NULL) {
+ printf("Failed to add RADIUS packet into retransmit list\n");
+ radius_msg_free(msg);
+ os_free(msg);
+ return;
+ }
+
+ if (addr)
+ os_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;
+ os_get_time(&entry->last_attempt);
+ entry->first_try = entry->last_attempt.sec;
+ entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
+ entry->attempts = 1;
+ 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) {
+ 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
+ radius->num_msgs++;
+}
+
+
+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;
+ }
+}
+
+
+int radius_client_send(struct radius_client_data *radius,
+ struct radius_msg *msg, RadiusType msg_type,
+ const u8 *addr)
+{
+ struct hostapd_radius_servers *conf = radius->conf;
+ u8 *shared_secret;
+ size_t shared_secret_len;
+ char *name;
+ int s, res;
+
+ if (msg_type == RADIUS_ACCT_INTERIM) {
+ /* Remove any pending interim acct update for the same STA. */
+ radius_client_list_del(radius, msg_type, addr);
+ }
+
+ if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM) {
+ if (conf->acct_server == NULL) {
+ hostapd_logger(radius->ctx, NULL,
+ HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_INFO,
+ "No accounting server configured");
+ return -1;
+ }
+ shared_secret = conf->acct_server->shared_secret;
+ shared_secret_len = conf->acct_server->shared_secret_len;
+ radius_msg_finish_acct(msg, shared_secret, shared_secret_len);
+ name = "accounting";
+ s = radius->acct_sock;
+ conf->acct_server->requests++;
+ } else {
+ if (conf->auth_server == NULL) {
+ hostapd_logger(radius->ctx, NULL,
+ HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_INFO,
+ "No authentication server configured");
+ return -1;
+ }
+ shared_secret = conf->auth_server->shared_secret;
+ shared_secret_len = conf->auth_server->shared_secret_len;
+ radius_msg_finish(msg, shared_secret, shared_secret_len);
+ name = "authentication";
+ s = radius->auth_sock;
+ conf->auth_server->requests++;
+ }
+
+ hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_DEBUG, "Sending RADIUS message to %s "
+ "server", name);
+ if (conf->msg_dumps)
+ radius_msg_dump(msg);
+
+ res = send(s, msg->buf, msg->buf_used, 0);
+ if (res < 0)
+ radius_client_handle_send_error(radius, s, msg_type);
+
+ radius_client_list_add(radius, msg, msg_type, shared_secret,
+ shared_secret_len, addr);
+
+ return res;
+}
+
+
+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_rx_handler *handlers;
+ size_t num_handlers, i;
+ struct radius_msg_list *req, *prev_req;
+ struct os_time 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) {
+ perror("recv[RADIUS]");
+ return;
+ }
+ hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_DEBUG, "Received %d bytes from RADIUS "
+ "server", 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");
+ rconf->malformed_responses++;
+ return;
+ }
+
+ hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_DEBUG, "Received RADIUS message");
+ if (conf->msg_dumps)
+ radius_msg_dump(msg);
+
+ switch (msg->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)) &&
+ req->msg->hdr->identifier == msg->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, msg->hdr->identifier);
+ goto fail;
+ }
+
+ os_get_time(&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);
+ os_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, msg->hdr->code, msg->hdr->identifier,
+ invalid_authenticator ? " [INVALID AUTHENTICATOR]" :
+ "");
+ radius_client_msg_free(req);
+
+ fail:
+ radius_msg_free(msg);
+ os_free(msg);
+}
+
+
+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 (entry->msg->hdr->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;
+}
+
+
+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);
+}
+
+
+void radius_client_update_acct_msgs(struct radius_client_data *radius,
+ u8 *shared_secret,
+ size_t shared_secret_len)
+{
+ struct radius_msg_list *entry;
+
+ if (!radius)
+ return;
+
+ for (entry = radius->msgs; entry; entry = entry->next) {
+ if (entry->msg_type == RADIUS_ACCT) {
+ entry->shared_secret = shared_secret;
+ entry->shared_secret_len = shared_secret_len;
+ radius_msg_finish_acct(entry->msg, shared_secret,
+ shared_secret_len);
+ }
+ }
+}
+
+
+static int
+radius_change_server(struct radius_client_data *radius,
+ struct hostapd_radius_server *nserv,
+ struct hostapd_radius_server *oserv,
+ int sock, int sock6, int auth)
+{
+ struct sockaddr_in serv;
+#ifdef CONFIG_IPV6
+ struct sockaddr_in6 serv6;
+#endif /* CONFIG_IPV6 */
+ struct sockaddr *addr;
+ socklen_t addrlen;
+ char abuf[50];
+ int sel_sock;
+ struct radius_msg_list *entry;
+
+ hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_INFO,
+ "%s server %s:%d",
+ auth ? "Authentication" : "Accounting",
+ hostapd_ip_txt(&nserv->addr, abuf, sizeof(abuf)),
+ nserv->port);
+
+ if (!oserv || nserv->shared_secret_len != oserv->shared_secret_len ||
+ os_memcmp(nserv->shared_secret, oserv->shared_secret,
+ nserv->shared_secret_len) != 0) {
+ /* Pending RADIUS packets used different shared secret, so
+ * they need to be modified. Update accounting message
+ * authenticators here. Authentication messages are removed
+ * since they would require more changes and the new RADIUS
+ * server may not be prepared to receive them anyway due to
+ * missing state information. Client will likely retry
+ * authentication, so this should not be an issue. */
+ if (auth)
+ radius_client_flush(radius, 1);
+ else {
+ radius_client_update_acct_msgs(
+ radius, nserv->shared_secret,
+ nserv->shared_secret_len);
+ }
+ }
+
+ /* Reset retry counters for the new server */
+ for (entry = radius->msgs; entry; entry = entry->next) {
+ if ((auth && entry->msg_type != RADIUS_AUTH) ||
+ (!auth && entry->msg_type != RADIUS_ACCT))
+ continue;
+ entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
+ entry->attempts = 0;
+ entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
+ }
+
+ if (radius->msgs) {
+ eloop_cancel_timeout(radius_client_timer, radius, NULL);
+ eloop_register_timeout(RADIUS_CLIENT_FIRST_WAIT, 0,
+ radius_client_timer, radius, NULL);
+ }
+
+ switch (nserv->addr.af) {
+ case AF_INET:
+ os_memset(&serv, 0, sizeof(serv));
+ serv.sin_family = AF_INET;
+ serv.sin_addr.s_addr = nserv->addr.u.v4.s_addr;
+ serv.sin_port = htons(nserv->port);
+ addr = (struct sockaddr *) &serv;
+ addrlen = sizeof(serv);
+ sel_sock = sock;
+ break;
+#ifdef CONFIG_IPV6
+ case AF_INET6:
+ os_memset(&serv6, 0, sizeof(serv6));
+ serv6.sin6_family = AF_INET6;
+ os_memcpy(&serv6.sin6_addr, &nserv->addr.u.v6,
+ sizeof(struct in6_addr));
+ serv6.sin6_port = htons(nserv->port);
+ addr = (struct sockaddr *) &serv6;
+ addrlen = sizeof(serv6);
+ sel_sock = sock6;
+ break;
+#endif /* CONFIG_IPV6 */
+ default:
+ return -1;
+ }
+
+ if (connect(sel_sock, addr, addrlen) < 0) {
+ perror("connect[radius]");
+ return -1;
+ }
+
+ if (auth)
+ radius->auth_sock = sel_sock;
+ else
+ radius->acct_sock = sel_sock;
+
+ return 0;
+}
+
+
+static void radius_retry_primary_timer(void *eloop_ctx, void *timeout_ctx)
+{
+ struct radius_client_data *radius = eloop_ctx;
+ struct hostapd_radius_servers *conf = radius->conf;
+ struct hostapd_radius_server *oserv;
+
+ if (radius->auth_sock >= 0 && conf->auth_servers &&
+ conf->auth_server != conf->auth_servers) {
+ oserv = conf->auth_server;
+ conf->auth_server = conf->auth_servers;
+ radius_change_server(radius, conf->auth_server, oserv,
+ radius->auth_serv_sock,
+ radius->auth_serv_sock6, 1);
+ }
+
+ if (radius->acct_sock >= 0 && conf->acct_servers &&
+ conf->acct_server != conf->acct_servers) {
+ oserv = conf->acct_server;
+ conf->acct_server = conf->acct_servers;
+ radius_change_server(radius, conf->acct_server, oserv,
+ radius->acct_serv_sock,
+ radius->acct_serv_sock6, 0);
+ }
+
+ if (conf->retry_primary_interval)
+ eloop_register_timeout(conf->retry_primary_interval, 0,
+ radius_retry_primary_timer, radius,
+ NULL);
+}
+
+
+static int radius_client_init_auth(struct radius_client_data *radius)
+{
+ struct hostapd_radius_servers *conf = radius->conf;
+ int ok = 0;
+
+ radius->auth_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
+ if (radius->auth_serv_sock < 0)
+ perror("socket[PF_INET,SOCK_DGRAM]");
+ else
+ ok++;
+
+#ifdef CONFIG_IPV6
+ radius->auth_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
+ if (radius->auth_serv_sock6 < 0)
+ perror("socket[PF_INET6,SOCK_DGRAM]");
+ else
+ ok++;
+#endif /* CONFIG_IPV6 */
+
+ if (ok == 0)
+ return -1;
+
+ radius_change_server(radius, conf->auth_server, NULL,
+ radius->auth_serv_sock, radius->auth_serv_sock6,
+ 1);
+
+ if (radius->auth_serv_sock >= 0 &&
+ eloop_register_read_sock(radius->auth_serv_sock,
+ radius_client_receive, radius,
+ (void *) RADIUS_AUTH)) {
+ printf("Could not register read socket for authentication "
+ "server\n");
+ return -1;
+ }
+
+#ifdef CONFIG_IPV6
+ if (radius->auth_serv_sock6 >= 0 &&
+ eloop_register_read_sock(radius->auth_serv_sock6,
+ radius_client_receive, radius,
+ (void *) RADIUS_AUTH)) {
+ printf("Could not register read socket for authentication "
+ "server\n");
+ return -1;
+ }
+#endif /* CONFIG_IPV6 */
+
+ return 0;
+}
+
+
+static int radius_client_init_acct(struct radius_client_data *radius)
+{
+ struct hostapd_radius_servers *conf = radius->conf;
+ int ok = 0;
+
+ radius->acct_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
+ if (radius->acct_serv_sock < 0)
+ perror("socket[PF_INET,SOCK_DGRAM]");
+ else
+ ok++;
+
+#ifdef CONFIG_IPV6
+ radius->acct_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
+ if (radius->acct_serv_sock6 < 0)
+ perror("socket[PF_INET6,SOCK_DGRAM]");
+ else
+ ok++;
+#endif /* CONFIG_IPV6 */
+
+ if (ok == 0)
+ return -1;
+
+ radius_change_server(radius, conf->acct_server, NULL,
+ radius->acct_serv_sock, radius->acct_serv_sock6,
+ 0);
+
+ if (radius->acct_serv_sock >= 0 &&
+ eloop_register_read_sock(radius->acct_serv_sock,
+ radius_client_receive, radius,
+ (void *) RADIUS_ACCT)) {
+ printf("Could not register read socket for accounting "
+ "server\n");
+ return -1;
+ }
+
+#ifdef CONFIG_IPV6
+ if (radius->acct_serv_sock6 >= 0 &&
+ eloop_register_read_sock(radius->acct_serv_sock6,
+ radius_client_receive, radius,
+ (void *) RADIUS_ACCT)) {
+ printf("Could not register read socket for accounting "
+ "server\n");
+ return -1;
+ }
+#endif /* CONFIG_IPV6 */
+
+ return 0;
+}
+
+
+struct radius_client_data *
+radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
+{
+ struct radius_client_data *radius;
+
+ radius = os_zalloc(sizeof(struct radius_client_data));
+ if (radius == NULL)
+ return NULL;
+
+ radius->ctx = ctx;
+ radius->conf = conf;
+ radius->auth_serv_sock = radius->acct_serv_sock =
+ radius->auth_serv_sock6 = radius->acct_serv_sock6 =
+ radius->auth_sock = radius->acct_sock = -1;
+
+ if (conf->auth_server && radius_client_init_auth(radius)) {
+ radius_client_deinit(radius);
+ return NULL;
+ }
+
+ if (conf->acct_server && radius_client_init_acct(radius)) {
+ radius_client_deinit(radius);
+ return NULL;
+ }
+
+ if (conf->retry_primary_interval)
+ eloop_register_timeout(conf->retry_primary_interval, 0,
+ radius_retry_primary_timer, radius,
+ NULL);
+
+ return radius;
+}
+
+
+void radius_client_deinit(struct radius_client_data *radius)
+{
+ if (!radius)
+ return;
+
+ if (radius->auth_serv_sock >= 0)
+ eloop_unregister_read_sock(radius->auth_serv_sock);
+ if (radius->acct_serv_sock >= 0)
+ eloop_unregister_read_sock(radius->acct_serv_sock);
+
+ eloop_cancel_timeout(radius_retry_primary_timer, radius, NULL);
+
+ radius_client_flush(radius, 0);
+ os_free(radius->auth_handlers);
+ os_free(radius->acct_handlers);
+ os_free(radius);
+}
+
+
+void radius_client_flush_auth(struct radius_client_data *radius, 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;
+ }
+}
+
+
+static int radius_client_dump_auth_server(char *buf, size_t buflen,
+ struct hostapd_radius_server *serv,
+ struct radius_client_data *cli)
+{
+ int pending = 0;
+ struct radius_msg_list *msg;
+ char abuf[50];
+
+ if (cli) {
+ for (msg = cli->msgs; msg; msg = msg->next) {
+ if (msg->msg_type == RADIUS_AUTH)
+ pending++;
+ }
+ }
+
+ return os_snprintf(buf, buflen,
+ "radiusAuthServerIndex=%d\n"
+ "radiusAuthServerAddress=%s\n"
+ "radiusAuthClientServerPortNumber=%d\n"
+ "radiusAuthClientRoundTripTime=%d\n"
+ "radiusAuthClientAccessRequests=%u\n"
+ "radiusAuthClientAccessRetransmissions=%u\n"
+ "radiusAuthClientAccessAccepts=%u\n"
+ "radiusAuthClientAccessRejects=%u\n"
+ "radiusAuthClientAccessChallenges=%u\n"
+ "radiusAuthClientMalformedAccessResponses=%u\n"
+ "radiusAuthClientBadAuthenticators=%u\n"
+ "radiusAuthClientPendingRequests=%u\n"
+ "radiusAuthClientTimeouts=%u\n"
+ "radiusAuthClientUnknownTypes=%u\n"
+ "radiusAuthClientPacketsDropped=%u\n",
+ serv->index,
+ hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
+ serv->port,
+ serv->round_trip_time,
+ serv->requests,
+ serv->retransmissions,
+ serv->access_accepts,
+ serv->access_rejects,
+ serv->access_challenges,
+ serv->malformed_responses,
+ serv->bad_authenticators,
+ pending,
+ serv->timeouts,
+ serv->unknown_types,
+ serv->packets_dropped);
+}
+
+
+static int radius_client_dump_acct_server(char *buf, size_t buflen,
+ struct hostapd_radius_server *serv,
+ struct radius_client_data *cli)
+{
+ int pending = 0;
+ struct radius_msg_list *msg;
+ char abuf[50];
+
+ if (cli) {
+ for (msg = cli->msgs; msg; msg = msg->next) {
+ if (msg->msg_type == RADIUS_ACCT ||
+ msg->msg_type == RADIUS_ACCT_INTERIM)
+ pending++;
+ }
+ }
+
+ return os_snprintf(buf, buflen,
+ "radiusAccServerIndex=%d\n"
+ "radiusAccServerAddress=%s\n"
+ "radiusAccClientServerPortNumber=%d\n"
+ "radiusAccClientRoundTripTime=%d\n"
+ "radiusAccClientRequests=%u\n"
+ "radiusAccClientRetransmissions=%u\n"
+ "radiusAccClientResponses=%u\n"
+ "radiusAccClientMalformedResponses=%u\n"
+ "radiusAccClientBadAuthenticators=%u\n"
+ "radiusAccClientPendingRequests=%u\n"
+ "radiusAccClientTimeouts=%u\n"
+ "radiusAccClientUnknownTypes=%u\n"
+ "radiusAccClientPacketsDropped=%u\n",
+ serv->index,
+ hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
+ serv->port,
+ serv->round_trip_time,
+ serv->requests,
+ serv->retransmissions,
+ serv->responses,
+ serv->malformed_responses,
+ serv->bad_authenticators,
+ pending,
+ serv->timeouts,
+ serv->unknown_types,
+ serv->packets_dropped);
+}
+
+
+int radius_client_get_mib(struct radius_client_data *radius, char *buf,
+ size_t buflen)
+{
+ struct hostapd_radius_servers *conf = radius->conf;
+ int i;
+ struct hostapd_radius_server *serv;
+ int count = 0;
+
+ if (conf->auth_servers) {
+ for (i = 0; i < conf->num_auth_servers; i++) {
+ serv = &conf->auth_servers[i];
+ count += radius_client_dump_auth_server(
+ buf + count, buflen - count, serv,
+ serv == conf->auth_server ?
+ radius : NULL);
+ }
+ }
+
+ if (conf->acct_servers) {
+ for (i = 0; i < conf->num_acct_servers; i++) {
+ serv = &conf->acct_servers[i];
+ count += radius_client_dump_acct_server(
+ buf + count, buflen - count, serv,
+ serv == conf->acct_server ?
+ radius : NULL);
+ }
+ }
+
+ return count;
+}
+
+
+static int radius_servers_diff(struct hostapd_radius_server *nserv,
+ struct hostapd_radius_server *oserv,
+ int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++) {
+ if (hostapd_ip_diff(&nserv[i].addr, &oserv[i].addr) ||
+ nserv[i].port != oserv[i].port ||
+ nserv[i].shared_secret_len != oserv[i].shared_secret_len ||
+ os_memcmp(nserv[i].shared_secret, oserv[i].shared_secret,
+ nserv[i].shared_secret_len) != 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+
+struct radius_client_data *
+radius_client_reconfig(struct radius_client_data *old, void *ctx,
+ struct hostapd_radius_servers *oldconf,
+ struct hostapd_radius_servers *newconf)
+{
+ radius_client_flush(old, 0);
+
+ if (newconf->retry_primary_interval !=
+ oldconf->retry_primary_interval ||
+ newconf->num_auth_servers != oldconf->num_auth_servers ||
+ newconf->num_acct_servers != oldconf->num_acct_servers ||
+ radius_servers_diff(newconf->auth_servers, oldconf->auth_servers,
+ newconf->num_auth_servers) ||
+ radius_servers_diff(newconf->acct_servers, oldconf->acct_servers,
+ newconf->num_acct_servers)) {
+ hostapd_logger(ctx, NULL, HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_DEBUG,
+ "Reconfiguring RADIUS client");
+ radius_client_deinit(old);
+ return radius_client_init(ctx, newconf);
+ }
+
+ return old;
+}