1274 lines
33 KiB
C
1274 lines
33 KiB
C
/*
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* hostapd / RADIUS client
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* Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "radius.h"
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#include "radius_client.h"
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#include "eloop.h"
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/* Defaults for RADIUS retransmit values (exponential backoff) */
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#define RADIUS_CLIENT_FIRST_WAIT 3 /* seconds */
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#define RADIUS_CLIENT_MAX_WAIT 120 /* seconds */
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#define RADIUS_CLIENT_MAX_RETRIES 10 /* maximum number of retransmit attempts
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* before entry is removed from retransmit
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* list */
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#define RADIUS_CLIENT_MAX_ENTRIES 30 /* maximum number of entries in retransmit
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* list (oldest will be removed, if this
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* limit is exceeded) */
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#define RADIUS_CLIENT_NUM_FAILOVER 4 /* try to change RADIUS server after this
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* many failed retry attempts */
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struct radius_rx_handler {
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RadiusRxResult (*handler)(struct radius_msg *msg,
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struct radius_msg *req,
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u8 *shared_secret, size_t shared_secret_len,
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void *data);
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void *data;
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};
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/* RADIUS message retransmit list */
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struct radius_msg_list {
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u8 addr[ETH_ALEN]; /* STA/client address; used to find RADIUS messages
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* for the same STA. */
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struct radius_msg *msg;
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RadiusType msg_type;
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os_time_t first_try;
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os_time_t next_try;
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int attempts;
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int next_wait;
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struct os_time last_attempt;
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u8 *shared_secret;
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size_t shared_secret_len;
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/* TODO: server config with failover to backup server(s) */
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struct radius_msg_list *next;
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};
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struct radius_client_data {
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void *ctx;
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struct hostapd_radius_servers *conf;
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int auth_serv_sock; /* socket for authentication RADIUS messages */
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int acct_serv_sock; /* socket for accounting RADIUS messages */
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int auth_serv_sock6;
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int acct_serv_sock6;
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int auth_sock; /* currently used socket */
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int acct_sock; /* currently used socket */
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struct radius_rx_handler *auth_handlers;
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size_t num_auth_handlers;
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struct radius_rx_handler *acct_handlers;
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size_t num_acct_handlers;
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struct radius_msg_list *msgs;
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size_t num_msgs;
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u8 next_radius_identifier;
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};
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static int
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radius_change_server(struct radius_client_data *radius,
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struct hostapd_radius_server *nserv,
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struct hostapd_radius_server *oserv,
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int sock, int sock6, int auth);
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static int radius_client_init_acct(struct radius_client_data *radius);
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static int radius_client_init_auth(struct radius_client_data *radius);
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static void radius_client_msg_free(struct radius_msg_list *req)
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{
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radius_msg_free(req->msg);
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os_free(req->msg);
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os_free(req);
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}
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int radius_client_register(struct radius_client_data *radius,
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RadiusType msg_type,
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RadiusRxResult (*handler)(struct radius_msg *msg,
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struct radius_msg *req,
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u8 *shared_secret,
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size_t shared_secret_len,
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void *data),
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void *data)
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{
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struct radius_rx_handler **handlers, *newh;
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size_t *num;
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if (msg_type == RADIUS_ACCT) {
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handlers = &radius->acct_handlers;
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num = &radius->num_acct_handlers;
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} else {
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handlers = &radius->auth_handlers;
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num = &radius->num_auth_handlers;
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}
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newh = os_realloc(*handlers,
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(*num + 1) * sizeof(struct radius_rx_handler));
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if (newh == NULL)
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return -1;
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newh[*num].handler = handler;
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newh[*num].data = data;
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(*num)++;
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*handlers = newh;
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return 0;
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}
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static void radius_client_handle_send_error(struct radius_client_data *radius,
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int s, RadiusType msg_type)
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{
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#ifndef CONFIG_NATIVE_WINDOWS
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int _errno = errno;
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perror("send[RADIUS]");
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if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL ||
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_errno == EBADF) {
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hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_INFO,
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"Send failed - maybe interface status changed -"
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" try to connect again");
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eloop_unregister_read_sock(s);
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close(s);
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if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM)
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radius_client_init_acct(radius);
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else
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radius_client_init_auth(radius);
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}
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#endif /* CONFIG_NATIVE_WINDOWS */
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}
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static int radius_client_retransmit(struct radius_client_data *radius,
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struct radius_msg_list *entry,
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os_time_t now)
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{
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struct hostapd_radius_servers *conf = radius->conf;
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int s;
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if (entry->msg_type == RADIUS_ACCT ||
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entry->msg_type == RADIUS_ACCT_INTERIM) {
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s = radius->acct_sock;
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if (entry->attempts == 0)
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conf->acct_server->requests++;
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else {
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conf->acct_server->timeouts++;
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conf->acct_server->retransmissions++;
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}
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} else {
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s = radius->auth_sock;
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if (entry->attempts == 0)
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conf->auth_server->requests++;
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else {
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conf->auth_server->timeouts++;
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conf->auth_server->retransmissions++;
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}
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}
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/* retransmit; remove entry if too many attempts */
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entry->attempts++;
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hostapd_logger(radius->ctx, entry->addr, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_DEBUG, "Resending RADIUS message (id=%d)",
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entry->msg->hdr->identifier);
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os_get_time(&entry->last_attempt);
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if (send(s, entry->msg->buf, entry->msg->buf_used, 0) < 0)
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radius_client_handle_send_error(radius, s, entry->msg_type);
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entry->next_try = now + entry->next_wait;
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entry->next_wait *= 2;
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if (entry->next_wait > RADIUS_CLIENT_MAX_WAIT)
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entry->next_wait = RADIUS_CLIENT_MAX_WAIT;
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if (entry->attempts >= RADIUS_CLIENT_MAX_RETRIES) {
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printf("Removing un-ACKed RADIUS message due to too many "
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"failed retransmit attempts\n");
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return 1;
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}
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return 0;
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}
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static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
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{
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struct radius_client_data *radius = eloop_ctx;
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struct hostapd_radius_servers *conf = radius->conf;
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struct os_time now;
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os_time_t first;
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struct radius_msg_list *entry, *prev, *tmp;
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int auth_failover = 0, acct_failover = 0;
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char abuf[50];
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entry = radius->msgs;
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if (!entry)
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return;
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os_get_time(&now);
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first = 0;
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prev = NULL;
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while (entry) {
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if (now.sec >= entry->next_try &&
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radius_client_retransmit(radius, entry, now.sec)) {
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if (prev)
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prev->next = entry->next;
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else
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radius->msgs = entry->next;
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tmp = entry;
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entry = entry->next;
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radius_client_msg_free(tmp);
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radius->num_msgs--;
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continue;
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}
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if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
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if (entry->msg_type == RADIUS_ACCT ||
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entry->msg_type == RADIUS_ACCT_INTERIM)
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acct_failover++;
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else
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auth_failover++;
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}
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if (first == 0 || entry->next_try < first)
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first = entry->next_try;
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prev = entry;
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entry = entry->next;
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}
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if (radius->msgs) {
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if (first < now.sec)
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first = now.sec;
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eloop_register_timeout(first - now.sec, 0,
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radius_client_timer, radius, NULL);
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hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
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"retransmit in %ld seconds",
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(long int) (first - now.sec));
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}
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if (auth_failover && conf->num_auth_servers > 1) {
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struct hostapd_radius_server *next, *old;
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old = conf->auth_server;
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hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_NOTICE,
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"No response from Authentication server "
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"%s:%d - failover",
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hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
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old->port);
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for (entry = radius->msgs; entry; entry = entry->next) {
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if (entry->msg_type == RADIUS_AUTH)
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old->timeouts++;
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}
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next = old + 1;
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if (next > &(conf->auth_servers[conf->num_auth_servers - 1]))
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next = conf->auth_servers;
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conf->auth_server = next;
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radius_change_server(radius, next, old,
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radius->auth_serv_sock,
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radius->auth_serv_sock6, 1);
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}
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if (acct_failover && conf->num_acct_servers > 1) {
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struct hostapd_radius_server *next, *old;
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old = conf->acct_server;
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hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_NOTICE,
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"No response from Accounting server "
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"%s:%d - failover",
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hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
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old->port);
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for (entry = radius->msgs; entry; entry = entry->next) {
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if (entry->msg_type == RADIUS_ACCT ||
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entry->msg_type == RADIUS_ACCT_INTERIM)
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old->timeouts++;
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}
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next = old + 1;
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if (next > &conf->acct_servers[conf->num_acct_servers - 1])
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next = conf->acct_servers;
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conf->acct_server = next;
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radius_change_server(radius, next, old,
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radius->acct_serv_sock,
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radius->acct_serv_sock6, 0);
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}
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}
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static void radius_client_update_timeout(struct radius_client_data *radius)
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{
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struct os_time now;
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os_time_t first;
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struct radius_msg_list *entry;
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eloop_cancel_timeout(radius_client_timer, radius, NULL);
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if (radius->msgs == NULL) {
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return;
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}
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first = 0;
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for (entry = radius->msgs; entry; entry = entry->next) {
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if (first == 0 || entry->next_try < first)
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first = entry->next_try;
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}
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os_get_time(&now);
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if (first < now.sec)
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first = now.sec;
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eloop_register_timeout(first - now.sec, 0, radius_client_timer, radius,
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NULL);
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hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_DEBUG, "Next RADIUS client retransmit in"
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" %ld seconds\n", (long int) (first - now.sec));
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}
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static void radius_client_list_add(struct radius_client_data *radius,
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struct radius_msg *msg,
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RadiusType msg_type, u8 *shared_secret,
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size_t shared_secret_len, const u8 *addr)
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{
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struct radius_msg_list *entry, *prev;
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if (eloop_terminated()) {
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/* No point in adding entries to retransmit queue since event
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* loop has already been terminated. */
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radius_msg_free(msg);
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os_free(msg);
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return;
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}
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entry = os_zalloc(sizeof(*entry));
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if (entry == NULL) {
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printf("Failed to add RADIUS packet into retransmit list\n");
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radius_msg_free(msg);
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os_free(msg);
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return;
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}
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if (addr)
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os_memcpy(entry->addr, addr, ETH_ALEN);
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entry->msg = msg;
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entry->msg_type = msg_type;
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entry->shared_secret = shared_secret;
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entry->shared_secret_len = shared_secret_len;
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os_get_time(&entry->last_attempt);
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entry->first_try = entry->last_attempt.sec;
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entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
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entry->attempts = 1;
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entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
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entry->next = radius->msgs;
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radius->msgs = entry;
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radius_client_update_timeout(radius);
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if (radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
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printf("Removing the oldest un-ACKed RADIUS packet due to "
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"retransmit list limits.\n");
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prev = NULL;
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while (entry->next) {
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prev = entry;
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entry = entry->next;
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}
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if (prev) {
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prev->next = NULL;
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radius_client_msg_free(entry);
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}
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} else
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radius->num_msgs++;
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}
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static void radius_client_list_del(struct radius_client_data *radius,
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RadiusType msg_type, const u8 *addr)
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{
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struct radius_msg_list *entry, *prev, *tmp;
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if (addr == NULL)
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return;
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entry = radius->msgs;
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prev = NULL;
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while (entry) {
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if (entry->msg_type == msg_type &&
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os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
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if (prev)
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prev->next = entry->next;
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else
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radius->msgs = entry->next;
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tmp = entry;
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entry = entry->next;
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hostapd_logger(radius->ctx, addr,
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HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_DEBUG,
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"Removing matching RADIUS message");
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radius_client_msg_free(tmp);
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radius->num_msgs--;
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continue;
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}
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prev = entry;
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entry = entry->next;
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}
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}
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int radius_client_send(struct radius_client_data *radius,
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struct radius_msg *msg, RadiusType msg_type,
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const u8 *addr)
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{
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struct hostapd_radius_servers *conf = radius->conf;
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u8 *shared_secret;
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size_t shared_secret_len;
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char *name;
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int s, res;
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if (msg_type == RADIUS_ACCT_INTERIM) {
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/* Remove any pending interim acct update for the same STA. */
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radius_client_list_del(radius, msg_type, addr);
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}
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if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM) {
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if (conf->acct_server == NULL) {
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hostapd_logger(radius->ctx, NULL,
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HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_INFO,
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"No accounting server configured");
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return -1;
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}
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shared_secret = conf->acct_server->shared_secret;
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shared_secret_len = conf->acct_server->shared_secret_len;
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radius_msg_finish_acct(msg, shared_secret, shared_secret_len);
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name = "accounting";
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s = radius->acct_sock;
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conf->acct_server->requests++;
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} else {
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if (conf->auth_server == NULL) {
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hostapd_logger(radius->ctx, NULL,
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HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_INFO,
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"No authentication server configured");
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return -1;
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}
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shared_secret = conf->auth_server->shared_secret;
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shared_secret_len = conf->auth_server->shared_secret_len;
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radius_msg_finish(msg, shared_secret, shared_secret_len);
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name = "authentication";
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s = radius->auth_sock;
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conf->auth_server->requests++;
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}
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hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
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HOSTAPD_LEVEL_DEBUG, "Sending RADIUS message to %s "
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"server", name);
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if (conf->msg_dumps)
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radius_msg_dump(msg);
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res = send(s, msg->buf, msg->buf_used, 0);
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if (res < 0)
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radius_client_handle_send_error(radius, s, msg_type);
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radius_client_list_add(radius, msg, msg_type, shared_secret,
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shared_secret_len, addr);
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return res;
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}
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static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
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{
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struct radius_client_data *radius = eloop_ctx;
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struct hostapd_radius_servers *conf = radius->conf;
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RadiusType msg_type = (RadiusType) sock_ctx;
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int len, roundtrip;
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unsigned char buf[3000];
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struct radius_msg *msg;
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struct radius_rx_handler *handlers;
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size_t num_handlers, i;
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struct radius_msg_list *req, *prev_req;
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struct os_time now;
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struct hostapd_radius_server *rconf;
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int invalid_authenticator = 0;
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if (msg_type == RADIUS_ACCT) {
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handlers = radius->acct_handlers;
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num_handlers = radius->num_acct_handlers;
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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);
|
|
}
|
|
|
|
|
|
static 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, claddr;
|
|
#ifdef CONFIG_IPV6
|
|
struct sockaddr_in6 serv6, claddr6;
|
|
#endif /* CONFIG_IPV6 */
|
|
struct sockaddr *addr, *cl_addr;
|
|
socklen_t addrlen, claddrlen;
|
|
char abuf[50];
|
|
int sel_sock;
|
|
struct radius_msg_list *entry;
|
|
struct hostapd_radius_servers *conf = radius->conf;
|
|
|
|
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 (conf->force_client_addr) {
|
|
switch (conf->client_addr.af) {
|
|
case AF_INET:
|
|
os_memset(&claddr, 0, sizeof(claddr));
|
|
claddr.sin_family = AF_INET;
|
|
claddr.sin_addr.s_addr = conf->client_addr.u.v4.s_addr;
|
|
claddr.sin_port = htons(0);
|
|
cl_addr = (struct sockaddr *) &claddr;
|
|
claddrlen = sizeof(claddr);
|
|
break;
|
|
#ifdef CONFIG_IPV6
|
|
case AF_INET6:
|
|
os_memset(&claddr6, 0, sizeof(claddr6));
|
|
claddr6.sin6_family = AF_INET6;
|
|
os_memcpy(&claddr6.sin6_addr, &conf->client_addr.u.v6,
|
|
sizeof(struct in6_addr));
|
|
claddr6.sin6_port = htons(0);
|
|
cl_addr = (struct sockaddr *) &claddr6;
|
|
claddrlen = sizeof(claddr6);
|
|
break;
|
|
#endif /* CONFIG_IPV6 */
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (bind(sel_sock, cl_addr, claddrlen) < 0) {
|
|
perror("bind[radius]");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (connect(sel_sock, addr, addrlen) < 0) {
|
|
perror("connect[radius]");
|
|
return -1;
|
|
}
|
|
|
|
#ifndef CONFIG_NATIVE_WINDOWS
|
|
switch (nserv->addr.af) {
|
|
case AF_INET:
|
|
claddrlen = sizeof(claddr);
|
|
getsockname(sel_sock, (struct sockaddr *) &claddr, &claddrlen);
|
|
wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
|
|
inet_ntoa(claddr.sin_addr), ntohs(claddr.sin_port));
|
|
break;
|
|
#ifdef CONFIG_IPV6
|
|
case AF_INET6: {
|
|
claddrlen = sizeof(claddr6);
|
|
getsockname(sel_sock, (struct sockaddr *) &claddr6,
|
|
&claddrlen);
|
|
wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
|
|
inet_ntop(AF_INET6, &claddr6.sin6_addr,
|
|
abuf, sizeof(abuf)),
|
|
ntohs(claddr6.sin6_port));
|
|
break;
|
|
}
|
|
#endif /* CONFIG_IPV6 */
|
|
}
|
|
#endif /* CONFIG_NATIVE_WINDOWS */
|
|
|
|
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;
|
|
}
|