Adding upstream version 3.2.3+dfsg.upstream/3.2.3+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 302 insertions, 0 deletions

diff --git a/src/modules/rlm_replicate/README.md b/src/modules/rlm_replicate/README.md
new file mode 100644
index 0000000..8563983
--- /dev/null
+++ b/src/modules/rlm_replicate/README.md
@@ -0,0 +1,10 @@
+# rlm_replicate
+## Metadata
+<dl>
+  <dt>category</dt><dd>io</dd>
+</dl>
+
+## Summary
+
+Provide a way to make a copy of incoming packets and forward them
+to another server.
diff --git a/src/modules/rlm_replicate/all.mk b/src/modules/rlm_replicate/all.mk
new file mode 100644
index 0000000..d49dd26
--- /dev/null
+++ b/src/modules/rlm_replicate/all.mk
@@ -0,0 +1,2 @@
+TARGET		:= rlm_replicate.a
+SOURCES		:= rlm_replicate.c
diff --git a/src/modules/rlm_replicate/rlm_replicate.c b/src/modules/rlm_replicate/rlm_replicate.c
new file mode 100644
index 0000000..cee26cc
--- /dev/null
+++ b/src/modules/rlm_replicate/rlm_replicate.c
@@ -0,0 +1,290 @@
+/*
+ *   This program is is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or (at
+ *   your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/**
+ * $Id$
+ * @file rlm_replicate.c
+ * @brief Duplicate RADIUS requests.
+ *
+ * @copyright 2011-2013  The FreeRADIUS server project
+ */
+RCSID("$Id$")
+
+#include <freeradius-devel/radiusd.h>
+#include <freeradius-devel/modules.h>
+
+#ifdef WITH_PROXY
+static void cleanup(RADIUS_PACKET *packet)
+{
+	if (!packet) return;
+	if (packet->sockfd >= 0) {
+		close(packet->sockfd);
+	}
+
+	rad_free(&packet);
+}
+
+/** Copy packet to multiple servers
+ *
+ * Create a duplicate of the packet and send it to a list of realms
+ * defined by the presence of the Replicate-To-Realm VP in the control
+ * list of the current request.
+ *
+ * This is pretty hacky and is 100% fire and forget. If you're looking
+ * to forward authentication requests to multiple realms and process
+ * the responses, this function will not allow you to do that.
+ *
+ * @param[in] instance 	of this module.
+ * @param[in] request 	The current request.
+ * @param[in] list	of attributes to copy to the duplicate packet.
+ * @param[in] code	to write into the code field of the duplicate packet.
+ * @return RCODE fail on error, invalid if list does not exist, noop if no replications succeeded, else ok.
+ */
+static int replicate_packet(UNUSED void *instance, REQUEST *request, pair_lists_t list, unsigned int code)
+{
+	int rcode = RLM_MODULE_NOOP;
+	VALUE_PAIR *vp, **vps;
+	vp_cursor_t cursor;
+	home_server_t *home;
+	REALM *realm;
+	home_pool_t *pool;
+	RADIUS_PACKET *packet = NULL;
+
+	/*
+	 *	Send as many packets as necessary to different
+	 *	destinations.
+	 */
+	fr_cursor_init(&cursor, &request->config);
+	while ((vp = fr_cursor_next_by_num(&cursor, PW_REPLICATE_TO_REALM, 0, TAG_ANY))) {
+		realm = realm_find2(vp->vp_strvalue);
+		if (!realm) {
+			REDEBUG2("Cannot Replicate to unknown realm \"%s\"", vp->vp_strvalue);
+			continue;
+		}
+
+		/*
+		 *	We shouldn't really do this on every loop.
+		 */
+		switch (request->packet->code) {
+		default:
+			REDEBUG2("Cannot replicate unknown packet code %d", request->packet->code);
+			cleanup(packet);
+			return RLM_MODULE_FAIL;
+
+		case PW_CODE_ACCESS_REQUEST:
+			pool = realm->auth_pool;
+			break;
+
+#ifdef WITH_ACCOUNTING
+
+		case PW_CODE_ACCOUNTING_REQUEST:
+			pool = realm->acct_pool;
+			break;
+#endif
+
+#ifdef WITH_COA
+		case PW_CODE_COA_REQUEST:
+		case PW_CODE_DISCONNECT_REQUEST:
+			pool = realm->coa_pool;
+			break;
+#endif
+		}
+
+		if (!pool) {
+			RWDEBUG2("Cancelling replication to Realm %s, as the realm is local", realm->name);
+			continue;
+		}
+
+		home = home_server_ldb(realm->name, pool, request);
+		if (!home) {
+			REDEBUG2("Failed to find live home server for realm %s", realm->name);
+			continue;
+		}
+
+#ifdef WITH_TCP
+		if (home->proto != IPPROTO_UDP) {
+			REDEBUG("The replicate module only does UDP - Cannot send to TCP home_server %s", home->name);
+			continue;
+		}
+#endif
+
+#ifdef WITH_TLS
+		if (home->tls) {
+			REDEBUG("The replicate module only does UDP - Cannot send to TLS home_server %s", home->name);
+			continue;
+		}
+#endif
+
+		/*
+		 *	For replication to multiple servers we re-use the packet
+		 *	we built here.
+		 */
+		if (!packet) {
+			packet = rad_alloc(request, true);
+			if (!packet) {
+				return RLM_MODULE_FAIL;
+			}
+
+			packet->code = code;
+			packet->id = fr_rand() & 0xff;
+			packet->sockfd = fr_socket(&home->src_ipaddr, 0);
+			if (packet->sockfd < 0) {
+				REDEBUG("Failed opening socket: %s", fr_strerror());
+				rcode = RLM_MODULE_FAIL;
+				goto done;
+			}
+
+			vps = radius_list(request, list);
+			if (!vps) {
+				RWDEBUG("List '%s' doesn't exist for this packet",
+					fr_int2str(pair_lists, list, "<INVALID>"));
+				rcode = RLM_MODULE_INVALID;
+				goto done;
+			}
+
+			/*
+			 *	Don't assume the list actually contains any
+			 *	attributes.
+			 */
+			if (*vps) {
+				packet->vps = fr_pair_list_copy(packet, *vps);
+				if (!packet->vps) {
+					rcode = RLM_MODULE_FAIL;
+					goto done;
+				}
+			}
+
+			/*
+			 *	For CHAP, create the CHAP-Challenge if
+			 *	it doesn't exist.
+			 */
+			if ((code == PW_CODE_ACCESS_REQUEST) &&
+			    (fr_pair_find_by_num(request->packet->vps, PW_CHAP_PASSWORD, 0, TAG_ANY) != NULL) &&
+			    (fr_pair_find_by_num(request->packet->vps, PW_CHAP_CHALLENGE, 0, TAG_ANY) == NULL)) {
+				uint8_t *p;
+				vp = radius_pair_create(packet, &packet->vps, PW_CHAP_CHALLENGE, 0);
+				vp->length = AUTH_VECTOR_LEN;
+				vp->vp_octets = p = talloc_array(vp, uint8_t, vp->length);
+				memcpy(p, request->packet->vector, AUTH_VECTOR_LEN);
+			}
+		} else {
+			size_t i;
+
+			for (i = 0; i < sizeof(packet->vector); i++) {
+				packet->vector[i] = fr_rand() & 0xff;
+			}
+
+			packet->id++;
+			TALLOC_FREE(packet->data);
+			packet->data_len = 0;
+		}
+
+		/*
+		 *	(Re)-Write these.
+		 */
+		packet->dst_ipaddr = home->ipaddr;
+		packet->dst_port = home->port;
+		memset(&packet->src_ipaddr, 0, sizeof(packet->src_ipaddr));
+		packet->src_port = 0;
+
+		/*
+		 *	Encode, sign and then send the packet.
+		 */
+		RDEBUG("Replicating list '%s' to Realm '%s'", fr_int2str(pair_lists, list, "<INVALID>"),
+		       realm->name);
+		if (rad_send(packet, NULL, home->secret) < 0) {
+			REDEBUG("Failed replicating packet: %s", fr_strerror());
+			rcode = RLM_MODULE_FAIL;
+			goto done;
+		}
+
+		/*
+		 *	We've sent it to at least one destination.
+		 */
+		rcode = RLM_MODULE_OK;
+	}
+
+	done:
+
+	cleanup(packet);
+	return rcode;
+}
+#else
+static rlm_rcode_t replicate_packet(UNUSED void *instance,
+				    UNUSED REQUEST *request,
+				    UNUSED pair_lists_t list,
+				    UNUSED unsigned int code)
+{
+	RDEBUG("Replication is unsupported in this build");
+	return RLM_MODULE_FAIL;
+}
+#endif
+
+static rlm_rcode_t CC_HINT(nonnull) mod_authorize(void *instance, REQUEST *request)
+{
+	return replicate_packet(instance, request, PAIR_LIST_REQUEST, request->packet->code);
+}
+
+static rlm_rcode_t CC_HINT(nonnull) mod_accounting(void *instance, REQUEST *request)
+{
+	return replicate_packet(instance, request, PAIR_LIST_REQUEST, request->packet->code);
+}
+
+static rlm_rcode_t CC_HINT(nonnull) mod_preaccounting(void *instance, REQUEST *request)
+{
+	return replicate_packet(instance, request, PAIR_LIST_REQUEST, request->packet->code);
+}
+
+#ifdef WITH_PROXY
+static rlm_rcode_t CC_HINT(nonnull) mod_pre_proxy(void *instance, REQUEST *request)
+{
+	return replicate_packet(instance, request, PAIR_LIST_PROXY_REQUEST, request->proxy->code);
+}
+#endif
+
+#ifdef WITH_COA
+static rlm_rcode_t CC_HINT(nonnull) mod_recv_coa(void *instance, REQUEST *request)
+{
+	return replicate_packet(instance, request, PAIR_LIST_REQUEST, request->packet->code);
+}
+#endif
+
+/*
+ *	The module name should be the only globally exported symbol.
+ *	That is, everything else should be 'static'.
+ *
+ *	If the module needs to temporarily modify it's instantiation
+ *	data, the type should be changed to RLM_TYPE_THREAD_UNSAFE.
+ *	The server will then take care of ensuring that the module
+ *	is single-threaded.
+ */
+extern module_t rlm_replicate;
+module_t rlm_replicate = {
+	.magic		= RLM_MODULE_INIT,
+	.name		= "replicate",
+	.type		= RLM_TYPE_THREAD_SAFE,
+	.methods = {
+		[MOD_AUTHORIZE]		= mod_authorize,
+		[MOD_ACCOUNTING]	= mod_accounting,
+		[MOD_PREACCT]		= mod_preaccounting,
+#ifdef WITH_PROXY
+		[MOD_PRE_PROXY]		= mod_pre_proxy,
+#endif
+#ifdef WITH_COA
+		[MOD_RECV_COA]		= mod_recv_coa
+#endif
+	},
+};