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/* $Id: npppd_radius.c,v 1.8 2015/07/23 09:04:06 yasuoka Exp $ */ |
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/*- |
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* Copyright (c) 2009 Internet Initiative Japan Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE"AUTHOR" AND CONTRIBUTORS AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* RFC 2865 Remote Authentication Dial In User Service (RADIUS) |
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* RFC 2866 RADIUS Accounting |
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* RFC 2868 RADIUS Attributes for Tunnel Protocol Support |
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* RFC 2869 RADIUS Extensions |
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*/ |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <sys/time.h> |
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#include <sys/syslog.h> |
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#include <netinet/in.h> |
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#include <net/if_dl.h> |
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#include <stdio.h> |
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#include <netdb.h> |
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#include <stdint.h> |
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#include <string.h> |
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#include <stdbool.h> |
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#include <radius.h> |
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48 |
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#include <event.h> |
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#include "radius_req.h" |
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#include "npppd_local.h" |
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#include "npppd_radius.h" |
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#ifdef NPPPD_RADIUS_DEBUG |
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#define NPPPD_RADIUS_DBG(x) ppp_log x |
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#define NPPPD_RADIUS_ASSERT(x) ASSERT(x) |
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#else |
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#define NPPPD_RADIUS_DBG(x) |
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#define NPPPD_RADIUS_ASSERT(x) |
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#endif |
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static int l2tp_put_tunnel_attributes(RADIUS_PACKET *, void *); |
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static int pptp_put_tunnel_attributes(RADIUS_PACKET *, void *); |
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static int radius_acct_request(npppd *, npppd_ppp *, int ); |
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static void npppd_ppp_radius_acct_reqcb(void *, RADIUS_PACKET *, int, RADIUS_REQUEST_CTX); |
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/*********************************************************************** |
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* RADIUS common functions |
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***********************************************************************/ |
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/** |
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* Retribute Framed-IP-Address and Framed-IP-Netmask attribute of from |
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* the given RADIUS packet and set them as the fields of ppp context. |
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*/ |
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void |
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ppp_proccess_radius_framed_ip(npppd_ppp *_this, RADIUS_PACKET *pkt) |
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{ |
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struct in_addr ip4; |
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if (radius_get_ipv4_attr(pkt, RADIUS_TYPE_FRAMED_IP_ADDRESS, &ip4) |
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== 0) |
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_this->realm_framed_ip_address = ip4; |
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_this->realm_framed_ip_netmask.s_addr = 0xffffffffL; |
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#ifndef NPPPD_COMPAT_4_2 |
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if (radius_get_ipv4_attr(pkt, RADIUS_TYPE_FRAMED_IP_NETMASK, &ip4) |
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== 0) |
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_this->realm_framed_ip_netmask = ip4; |
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#endif |
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} |
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/*********************************************************************** |
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* RADIUS Accounting Events |
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***********************************************************************/ |
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/** Called by PPP on start */ |
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void |
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npppd_ppp_radius_acct_start(npppd *pppd, npppd_ppp *ppp) |
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{ |
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NPPPD_RADIUS_DBG((ppp, LOG_INFO, "%s()", __func__)); |
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if (ppp->realm == NULL || !npppd_ppp_is_realm_radius(pppd, ppp)) |
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return; |
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radius_acct_request(pppd, ppp, 0); |
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} |
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/** Called by PPP on stop*/ |
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void |
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npppd_ppp_radius_acct_stop(npppd *pppd, npppd_ppp *ppp) |
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{ |
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NPPPD_RADIUS_DBG((ppp, LOG_INFO, "%s()", __func__)); |
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if (ppp->realm == NULL || !npppd_ppp_is_realm_radius(pppd, ppp)) |
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return; |
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radius_acct_request(pppd, ppp, 1); |
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} |
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/** Called by radius_req.c */ |
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static void |
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npppd_ppp_radius_acct_reqcb(void *context, RADIUS_PACKET *pkt, int flags, |
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RADIUS_REQUEST_CTX ctx) |
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{ |
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u_int ppp_id; |
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ppp_id = (uintptr_t)context; |
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if ((flags & RADIUS_REQUEST_TIMEOUT) != 0) { |
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log_printf(LOG_WARNING, "ppp id=%u radius accounting request " |
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"failed: no response from the server.", ppp_id); |
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} |
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else if ((flags & RADIUS_REQUEST_ERROR) != 0) |
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log_printf(LOG_WARNING, "ppp id=%u radius accounting request " |
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"failed: %m", ppp_id); |
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else if ((flags & RADIUS_REQUEST_CHECK_AUTHENTICATOR_NO_CHECK) == 0 && |
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(flags & RADIUS_REQUEST_CHECK_AUTHENTICATOR_OK) == 0) |
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log_printf(LOG_WARNING, "ppp id=%d radius accounting request " |
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"failed: the server responses with bad authenticator", |
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ppp_id); |
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else { |
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#ifdef NPPPD_RADIUS_DEBUG |
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log_printf(LOG_DEBUG, "ppp id=%u radius accounting request " |
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"succeeded.", ppp_id); |
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#endif |
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return; |
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/* NOTREACHED */ |
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} |
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if (radius_request_can_failover(ctx)) { |
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if (radius_request_failover(ctx) == 0) { |
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struct sockaddr *sa; |
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char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; |
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sa = radius_get_server_address(ctx); |
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if (getnameinfo(sa, sa->sa_len, hbuf, sizeof(hbuf), |
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sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) |
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!= 0) { |
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strlcpy(hbuf, "unknown", sizeof(hbuf)); |
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strlcpy(sbuf, "", sizeof(sbuf)); |
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} |
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log_printf(LOG_DEBUG, "ppp id=%u " |
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"fail over to %s:%s for radius accounting request", |
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ppp_id, hbuf, sbuf); |
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} else { |
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log_printf(LOG_WARNING, "ppp id=%u " |
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"failed to fail over for radius accounting request", |
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ppp_id); |
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} |
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} |
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} |
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/*********************************************************************** |
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* RADIUS attributes |
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***********************************************************************/ |
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#define ATTR_INT32(_a,_v) \ |
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do { \ |
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if (radius_put_uint32_attr(radpkt, (_a), (_v)) != 0) \ |
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goto fail; \ |
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} while (0 /* CONSTCOND */) |
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#define ATTR_STR(_a,_v) \ |
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do { \ |
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if (radius_put_string_attr(radpkt, (_a), (_v)) != 0) \ |
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goto fail; \ |
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} while (0 /* CONSTCOND */) |
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static int |
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radius_acct_request(npppd *pppd, npppd_ppp *ppp, int stop) |
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{ |
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RADIUS_PACKET *radpkt; |
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RADIUS_REQUEST_CTX radctx; |
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radius_req_setting *rad_setting; |
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char buf[128]; |
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if (ppp->username[0] == '\0') |
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return 0; |
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radpkt = NULL; |
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radctx = NULL; |
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rad_setting = npppd_auth_radius_get_radius_acct_setting(ppp->realm); |
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if (!radius_req_setting_has_server(rad_setting)) |
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return 0; |
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if ((radpkt = radius_new_request_packet(RADIUS_CODE_ACCOUNTING_REQUEST)) |
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== NULL) |
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goto fail; |
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if (radius_prepare(rad_setting, (void *)(uintptr_t)ppp->id, &radctx, |
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npppd_ppp_radius_acct_reqcb) != 0) |
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goto fail; |
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206 |
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/* NAS Information */ |
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/* |
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* RFC 2865 "5.4. NAS-IP-Address" or RFC 3162 "2.1. NAS-IPv6-Address" |
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*/ |
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if (radius_prepare_nas_address(rad_setting, radpkt) != 0) |
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goto fail; |
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213 |
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/* RFC 2865 "5.41. NAS-Port-Type" */ |
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ATTR_INT32(RADIUS_TYPE_NAS_PORT_TYPE, RADIUS_NAS_PORT_TYPE_VIRTUAL); |
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216 |
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/* RFC 2865 "5.5. NAS-Port" */ |
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ATTR_INT32(RADIUS_TYPE_NAS_PORT, ppp->id); |
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/* npppd has no physical / virtual ports in design. */ |
219 |
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220 |
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/* RFC 2865 5.31. Calling-Station-Id */ |
221 |
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if (ppp->calling_number[0] != '\0') |
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ATTR_STR(RADIUS_TYPE_CALLING_STATION_ID, ppp->calling_number); |
223 |
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224 |
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/* Tunnel Protocol Information */ |
225 |
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switch (ppp->tunnel_type) { |
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case NPPPD_TUNNEL_L2TP: |
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/* RFC 2868 3.1. Tunnel-Type */ |
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ATTR_INT32(RADIUS_TYPE_TUNNEL_TYPE, RADIUS_TUNNEL_TYPE_L2TP); |
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if (l2tp_put_tunnel_attributes(radpkt, ppp->phy_context) != 0) |
230 |
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goto fail; |
231 |
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break; |
232 |
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case NPPPD_TUNNEL_PPTP: |
233 |
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/* RFC 2868 3.1. Tunnel-Type */ |
234 |
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ATTR_INT32(RADIUS_TYPE_TUNNEL_TYPE, RADIUS_TUNNEL_TYPE_PPTP); |
235 |
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if (pptp_put_tunnel_attributes(radpkt, ppp->phy_context) != 0) |
236 |
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goto fail; |
237 |
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break; |
238 |
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} |
239 |
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240 |
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/* Framed Protocol (PPP) Information */ |
241 |
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/* RFC 2865 5.1 User-Name */ |
242 |
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ATTR_STR(RADIUS_TYPE_USER_NAME, ppp->username); |
243 |
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244 |
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/* RFC 2865 "5.7. Service-Type" */ |
245 |
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ATTR_INT32(RADIUS_TYPE_SERVICE_TYPE, RADIUS_SERVICE_TYPE_FRAMED); |
246 |
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247 |
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/* RFC 2865 "5.8. Framed-Protocol" */ |
248 |
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ATTR_INT32(RADIUS_TYPE_FRAMED_PROTOCOL, RADIUS_FRAMED_PROTOCOL_PPP); |
249 |
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250 |
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/* RFC 2865 "5.8. Framed-IP-Address" */ |
251 |
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if (ppp->acct_framed_ip_address.s_addr != INADDR_ANY) |
252 |
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ATTR_INT32(RADIUS_TYPE_FRAMED_IP_ADDRESS, |
253 |
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ntohl(ppp->acct_framed_ip_address.s_addr)); |
254 |
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255 |
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/* Accounting */ |
256 |
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/* RFC 2866 5.1. Acct-Status-Type */ |
257 |
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ATTR_INT32(RADIUS_TYPE_ACCT_STATUS_TYPE, (stop) |
258 |
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? RADIUS_ACCT_STATUS_TYPE_STOP : RADIUS_ACCT_STATUS_TYPE_START); |
259 |
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260 |
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/* RFC 2866 5.2. Acct-Delay-Time */ |
261 |
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ATTR_INT32(RADIUS_TYPE_ACCT_DELAY_TIME, 0); |
262 |
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263 |
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if (stop) { |
264 |
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/* RFC 2866 5.3 Acct-Input-Octets */ |
265 |
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ATTR_INT32(RADIUS_TYPE_ACCT_INPUT_OCTETS, |
266 |
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(uint32_t)(ppp->ibytes & 0xFFFFFFFFU)); /* LSB 32bit */ |
267 |
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268 |
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/* RFC 2866 5.4 Acct-Output-Octets */ |
269 |
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ATTR_INT32(RADIUS_TYPE_ACCT_OUTPUT_OCTETS, |
270 |
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(uint32_t)(ppp->obytes & 0xFFFFFFFFU)); /* LSB 32bit */ |
271 |
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} |
272 |
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273 |
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/* RFC 2866 5.5 Acct-Session-Id */ |
274 |
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snprintf(buf, sizeof(buf), "%08X%08X", pppd->boot_id, ppp->id); |
275 |
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ATTR_STR(RADIUS_TYPE_ACCT_SESSION_ID, buf); |
276 |
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277 |
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/* RFC 2866 5.6. Acct-Authentic */ |
278 |
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ATTR_INT32(RADIUS_TYPE_ACCT_AUTHENTIC, RADIUS_ACCT_AUTHENTIC_RADIUS); |
279 |
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280 |
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if (stop) { |
281 |
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/* RFC 2866 5.7. Acct-Session-Time */ |
282 |
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ATTR_INT32(RADIUS_TYPE_ACCT_SESSION_TIME, |
283 |
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ppp->end_monotime - ppp->start_monotime); |
284 |
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285 |
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/* RFC 2866 5.8 Acct-Input-Packets */ |
286 |
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ATTR_INT32(RADIUS_TYPE_ACCT_INPUT_PACKETS, ppp->ipackets); |
287 |
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|
288 |
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/* RFC 2866 5.9 Acct-Output-Packets */ |
289 |
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ATTR_INT32(RADIUS_TYPE_ACCT_OUTPUT_PACKETS, ppp->opackets); |
290 |
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291 |
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/* RFC 2866 5.10. Acct-Terminate-Cause */ |
292 |
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if (ppp->terminate_cause != 0) |
293 |
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ATTR_INT32(RADIUS_TYPE_ACCT_TERMINATE_CAUSE, |
294 |
|
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ppp->terminate_cause); |
295 |
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|
296 |
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/* RFC 2869 5.1 Acct-Input-Gigawords */ |
297 |
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ATTR_INT32(RADIUS_TYPE_ACCT_INPUT_GIGAWORDS, ppp->ibytes >> 32); |
298 |
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|
299 |
|
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/* RFC 2869 5.2 Acct-Output-Gigawords */ |
300 |
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ATTR_INT32(RADIUS_TYPE_ACCT_OUTPUT_GIGAWORDS, |
301 |
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ppp->obytes >> 32); |
302 |
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} |
303 |
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|
304 |
|
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radius_set_accounting_request_authenticator(radpkt, |
305 |
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radius_get_server_secret(radctx)); |
306 |
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|
307 |
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/* Send the request */ |
308 |
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radius_request(radctx, radpkt); |
309 |
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|
310 |
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return 0; |
311 |
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312 |
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fail: |
313 |
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ppp_log(ppp, LOG_WARNING, "radius accounting request failed: %m"); |
314 |
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|
315 |
|
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if (radctx != NULL) |
316 |
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radius_cancel_request(radctx); |
317 |
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if (radpkt != NULL) |
318 |
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radius_delete_packet(radpkt); |
319 |
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|
320 |
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return -1; |
321 |
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} |
322 |
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323 |
|
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#ifdef USE_NPPPD_PPTP |
324 |
|
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#include "pptp.h" |
325 |
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#endif |
326 |
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|
327 |
|
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static int |
328 |
|
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pptp_put_tunnel_attributes(RADIUS_PACKET *radpkt, void *call0) |
329 |
|
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{ |
330 |
|
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#ifdef USE_NPPPD_PPTP |
331 |
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pptp_call *call = call0; |
332 |
|
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pptp_ctrl *ctrl; |
333 |
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char hbuf[NI_MAXHOST], buf[128]; |
334 |
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|
335 |
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ctrl = call->ctrl; |
336 |
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|
337 |
|
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/* RFC 2868 3.2. Tunnel-Medium-Type */ |
338 |
|
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switch (ctrl->peer.ss_family) { |
339 |
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case AF_INET: |
340 |
|
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ATTR_INT32(RADIUS_TYPE_TUNNEL_MEDIUM_TYPE, |
341 |
|
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RADIUS_TUNNEL_MEDIUM_TYPE_IPV4); |
342 |
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break; |
343 |
|
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|
344 |
|
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case AF_INET6: |
345 |
|
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ATTR_INT32(RADIUS_TYPE_TUNNEL_MEDIUM_TYPE, |
346 |
|
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RADIUS_TUNNEL_MEDIUM_TYPE_IPV6); |
347 |
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break; |
348 |
|
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|
349 |
|
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default: |
350 |
|
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return -1; |
351 |
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} |
352 |
|
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|
353 |
|
|
/* RFC 2868 3.3. Tunnel-Client-Endpoint */ |
354 |
|
|
if (getnameinfo((struct sockaddr *)&ctrl->peer, ctrl->peer.ss_len, hbuf, |
355 |
|
|
sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) |
356 |
|
|
return 1; |
357 |
|
|
ATTR_STR(RADIUS_TYPE_TUNNEL_CLIENT_ENDPOINT, hbuf); |
358 |
|
|
|
359 |
|
|
/* RFC 2868 3.4. Tunnel-Server-Endpoint */ |
360 |
|
|
if (getnameinfo((struct sockaddr *)&ctrl->our, ctrl->our.ss_len, hbuf, |
361 |
|
|
sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) |
362 |
|
|
return 1; |
363 |
|
|
ATTR_STR(RADIUS_TYPE_TUNNEL_SERVER_ENDPOINT, hbuf); |
364 |
|
|
|
365 |
|
|
/* RFC 2868 3.7. Tunnel-Assignment-ID */ |
366 |
|
|
snprintf(buf, sizeof(buf), "PPTP-CALL-%d", call->id); |
367 |
|
|
ATTR_STR(RADIUS_TYPE_TUNNEL_ASSIGNMENT_ID, buf); |
368 |
|
|
|
369 |
|
|
/* RFC 2867 4.1. Acct-Tunnel-Connection */ |
370 |
|
|
snprintf(buf, sizeof(buf), "PPTP-CTRL-%d", ctrl->id); |
371 |
|
|
ATTR_STR(RADIUS_TYPE_ACCT_TUNNEL_CONNECTION, buf); |
372 |
|
|
|
373 |
|
|
return 0; |
374 |
|
|
fail: |
375 |
|
|
#endif |
376 |
|
|
return 1; |
377 |
|
|
} |
378 |
|
|
|
379 |
|
|
#ifdef USE_NPPPD_L2TP |
380 |
|
|
#include "l2tp.h" |
381 |
|
|
#endif |
382 |
|
|
|
383 |
|
|
static int |
384 |
|
|
l2tp_put_tunnel_attributes(RADIUS_PACKET *radpkt, void *call0) |
385 |
|
|
{ |
386 |
|
|
#ifdef USE_NPPPD_L2TP |
387 |
|
|
l2tp_call *call = call0; |
388 |
|
|
l2tp_ctrl *ctrl; |
389 |
|
|
char hbuf[NI_MAXHOST], buf[128]; |
390 |
|
|
|
391 |
|
|
ctrl = call->ctrl; |
392 |
|
|
|
393 |
|
|
/* RFC 2868 3.2. Tunnel-Medium-Type */ |
394 |
|
|
switch (ctrl->peer.ss_family) { |
395 |
|
|
case AF_INET: |
396 |
|
|
ATTR_INT32(RADIUS_TYPE_TUNNEL_MEDIUM_TYPE, |
397 |
|
|
RADIUS_TUNNEL_MEDIUM_TYPE_IPV4); |
398 |
|
|
break; |
399 |
|
|
|
400 |
|
|
case AF_INET6: |
401 |
|
|
ATTR_INT32(RADIUS_TYPE_TUNNEL_MEDIUM_TYPE, |
402 |
|
|
RADIUS_TUNNEL_MEDIUM_TYPE_IPV6); |
403 |
|
|
break; |
404 |
|
|
|
405 |
|
|
default: |
406 |
|
|
return -1; |
407 |
|
|
} |
408 |
|
|
|
409 |
|
|
/* RFC 2868 3.3. Tunnel-Client-Endpoint */ |
410 |
|
|
if (getnameinfo((struct sockaddr *)&ctrl->peer, ctrl->peer.ss_len, hbuf, |
411 |
|
|
sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) |
412 |
|
|
return 1; |
413 |
|
|
ATTR_STR(RADIUS_TYPE_TUNNEL_CLIENT_ENDPOINT, hbuf); |
414 |
|
|
|
415 |
|
|
/* RFC 2868 3.4. Tunnel-Server-Endpoint */ |
416 |
|
|
if (getnameinfo((struct sockaddr *)&ctrl->sock, ctrl->sock.ss_len, hbuf, |
417 |
|
|
sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) |
418 |
|
|
return 1; |
419 |
|
|
ATTR_STR(RADIUS_TYPE_TUNNEL_SERVER_ENDPOINT, hbuf); |
420 |
|
|
|
421 |
|
|
/* RFC 2868 3.7. Tunnel-Assignment-ID */ |
422 |
|
|
snprintf(buf, sizeof(buf), "L2TP-CALL-%d", call->id); |
423 |
|
|
ATTR_STR(RADIUS_TYPE_TUNNEL_ASSIGNMENT_ID, buf); |
424 |
|
|
|
425 |
|
|
/* RFC 2867 4.1. Acct-Tunnel-Connection */ |
426 |
|
|
snprintf(buf, sizeof(buf), "L2TP-CTRL-%d", ctrl->id); |
427 |
|
|
ATTR_STR(RADIUS_TYPE_ACCT_TUNNEL_CONNECTION, buf); |
428 |
|
|
|
429 |
|
|
return 0; |
430 |
|
|
fail: |
431 |
|
|
#endif |
432 |
|
|
return 1; |
433 |
|
|
} |