1 files changed, 514 insertions, 0 deletions

diff --git a/bin/named/lwdgrbn.c b/bin/named/lwdgrbn.c
new file mode 100644
index 0000000..407267d
--- /dev/null
+++ b/bin/named/lwdgrbn.c
@@ -0,0 +1,514 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/* $Id: lwdgrbn.c,v 1.22 2009/09/02 23:48:01 tbox Exp $ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <inttypes.h>
+
+#include <isc/mem.h>
+#include <isc/socket.h>
+#include <isc/string.h>		/* Required for HP/UX (and others?) */
+#include <isc/util.h>
+
+#include <dns/db.h>
+#include <dns/lookup.h>
+#include <dns/rdata.h>
+#include <dns/rdataset.h>
+#include <dns/rdatasetiter.h>
+#include <dns/result.h>
+#include <dns/view.h>
+
+#include <named/types.h>
+#include <named/lwdclient.h>
+#include <named/lwresd.h>
+#include <named/lwsearch.h>
+
+static void start_lookup(ns_lwdclient_t *);
+
+static isc_result_t
+fill_array(int *pos, dns_rdataset_t *rdataset,
+	   int size, unsigned char **rdatas, uint16_t *rdatalen)
+{
+	dns_rdata_t rdata;
+	isc_result_t result;
+	isc_region_t r;
+
+	UNUSED(size);
+
+	dns_rdata_init(&rdata);
+	for (result = dns_rdataset_first(rdataset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(rdataset))
+	{
+		INSIST(*pos < size);
+		dns_rdataset_current(rdataset, &rdata);
+		dns_rdata_toregion(&rdata, &r);
+		rdatas[*pos] = r.base;
+		rdatalen[*pos] = r.length;
+		dns_rdata_reset(&rdata);
+		(*pos)++;
+	}
+	if (result == ISC_R_NOMORE)
+		result = ISC_R_SUCCESS;
+	return (result);
+}
+
+static isc_result_t
+iterate_node(lwres_grbnresponse_t *grbn, dns_db_t *db, dns_dbnode_t *node,
+	     isc_mem_t *mctx)
+{
+	int used = 0, count;
+	int size = 8, oldsize = 0;
+	unsigned char **rdatas = NULL, **oldrdatas = NULL, **newrdatas = NULL;
+	uint16_t *lens = NULL, *oldlens = NULL, *newlens = NULL;
+	dns_rdatasetiter_t *iter = NULL;
+	dns_rdataset_t set;
+	dns_ttl_t ttl = INT32_MAX;
+	uint32_t flags = LWRDATA_VALIDATED;
+	isc_result_t result = ISC_R_NOMEMORY;
+
+	result = dns_db_allrdatasets(db, node, NULL, 0, &iter);
+	if (result != ISC_R_SUCCESS)
+		goto out;
+
+	rdatas = isc_mem_get(mctx, size * sizeof(*rdatas));
+	if (rdatas == NULL)
+		goto out;
+	lens = isc_mem_get(mctx, size * sizeof(*lens));
+	if (lens == NULL)
+		goto out;
+
+	for (result = dns_rdatasetiter_first(iter);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdatasetiter_next(iter))
+	{
+		result = ISC_R_NOMEMORY;
+		dns_rdataset_init(&set);
+		dns_rdatasetiter_current(iter, &set);
+
+		if (set.type != dns_rdatatype_rrsig) {
+			dns_rdataset_disassociate(&set);
+			continue;
+		}
+
+		count = dns_rdataset_count(&set);
+		if (used + count > size) {
+			/* copy & reallocate */
+			oldsize = size;
+			oldrdatas = rdatas;
+			oldlens = lens;
+			rdatas = NULL;
+			lens = NULL;
+
+			size *= 2;
+
+			rdatas = isc_mem_get(mctx, size * sizeof(*rdatas));
+			if (rdatas == NULL)
+				goto out;
+			lens = isc_mem_get(mctx, size * sizeof(*lens));
+			if (lens == NULL)
+				goto out;
+			memmove(rdatas, oldrdatas, used * sizeof(*rdatas));
+			memmove(lens, oldlens, used * sizeof(*lens));
+			isc_mem_put(mctx, oldrdatas,
+				    oldsize * sizeof(*oldrdatas));
+			isc_mem_put(mctx, oldlens, oldsize * sizeof(*oldlens));
+			oldrdatas = NULL;
+			oldlens = NULL;
+		}
+		if (set.ttl < ttl)
+			ttl = set.ttl;
+		if (set.trust != dns_trust_secure)
+			flags &= (~LWRDATA_VALIDATED);
+		result = fill_array(&used, &set, size, rdatas, lens);
+		dns_rdataset_disassociate(&set);
+		if (result != ISC_R_SUCCESS)
+			goto out;
+	}
+	if (result == ISC_R_NOMORE)
+		result = ISC_R_SUCCESS;
+	if (result != ISC_R_SUCCESS)
+		goto out;
+	dns_rdatasetiter_destroy(&iter);
+
+	/*
+	 * If necessary, shrink and copy the arrays.
+	 */
+	if (size != used) {
+		result = ISC_R_NOMEMORY;
+		newrdatas = isc_mem_get(mctx, used * sizeof(*rdatas));
+		if (newrdatas == NULL)
+			goto out;
+		newlens = isc_mem_get(mctx, used * sizeof(*lens));
+		if (newlens == NULL)
+			goto out;
+		memmove(newrdatas, rdatas, used * sizeof(*rdatas));
+		memmove(newlens, lens, used * sizeof(*lens));
+		isc_mem_put(mctx, rdatas, size * sizeof(*rdatas));
+		isc_mem_put(mctx, lens, size * sizeof(*lens));
+		grbn->rdatas = newrdatas;
+		grbn->rdatalen = newlens;
+	} else {
+		grbn->rdatas = rdatas;
+		grbn->rdatalen = lens;
+	}
+	grbn->nrdatas = used;
+	grbn->ttl = ttl;
+	grbn->flags = flags;
+	return (ISC_R_SUCCESS);
+
+ out:
+	dns_rdatasetiter_destroy(&iter);
+	if (rdatas != NULL)
+		isc_mem_put(mctx, rdatas, size * sizeof(*rdatas));
+	if (lens != NULL)
+		isc_mem_put(mctx, lens, size * sizeof(*lens));
+	if (oldrdatas != NULL)
+		isc_mem_put(mctx, oldrdatas, oldsize * sizeof(*oldrdatas));
+	if (oldlens != NULL)
+		isc_mem_put(mctx, oldlens, oldsize * sizeof(*oldlens));
+	if (newrdatas != NULL)
+		isc_mem_put(mctx, newrdatas, used * sizeof(*newrdatas));
+	return (result);
+}
+
+static void
+lookup_done(isc_task_t *task, isc_event_t *event) {
+	ns_lwdclient_t *client;
+	ns_lwdclientmgr_t *cm;
+	dns_lookupevent_t *levent;
+	lwres_buffer_t lwb;
+	dns_name_t *name;
+	dns_rdataset_t *rdataset;
+	dns_rdataset_t *sigrdataset;
+	isc_result_t result;
+	lwres_result_t lwresult;
+	isc_region_t r;
+	isc_buffer_t b;
+	lwres_grbnresponse_t *grbn;
+	int i;
+
+	REQUIRE(event != NULL);
+
+	UNUSED(task);
+
+	lwb.base = NULL;
+	client = event->ev_arg;
+	cm = client->clientmgr;
+	INSIST(client->lookup == (dns_lookup_t *)event->ev_sender);
+
+	levent = (dns_lookupevent_t *)event;
+	grbn = &client->grbn;
+
+	ns_lwdclient_log(50, "lookup event result = %s",
+			 isc_result_totext(levent->result));
+
+	result = levent->result;
+	if (result != ISC_R_SUCCESS) {
+		dns_lookup_destroy(&client->lookup);
+		isc_event_free(&event);
+		levent = NULL;
+
+		switch (result) {
+		case DNS_R_NXDOMAIN:
+		case DNS_R_NCACHENXDOMAIN:
+			result = ns_lwsearchctx_next(&client->searchctx);
+			if (result != ISC_R_SUCCESS)
+				lwresult = LWRES_R_NOTFOUND;
+			else {
+				start_lookup(client);
+				return;
+			}
+			break;
+		case DNS_R_NXRRSET:
+		case DNS_R_NCACHENXRRSET:
+			lwresult = LWRES_R_TYPENOTFOUND;
+			break;
+		default:
+			lwresult = LWRES_R_FAILURE;
+		}
+		ns_lwdclient_errorpktsend(client, lwresult);
+		return;
+	}
+
+	name = levent->name;
+	b = client->recv_buffer;
+
+	grbn->flags = 0;
+
+	grbn->nrdatas = 0;
+	grbn->rdatas = NULL;
+	grbn->rdatalen = NULL;
+
+	grbn->nsigs = 0;
+	grbn->sigs = NULL;
+	grbn->siglen = NULL;
+
+	result = dns_name_totext(name, true, &client->recv_buffer);
+	if (result != ISC_R_SUCCESS)
+		goto out;
+	grbn->realname = (char *)isc_buffer_used(&b);
+	grbn->realnamelen = isc_buffer_usedlength(&client->recv_buffer) -
+			    isc_buffer_usedlength(&b);
+	ns_lwdclient_log(50, "found name '%.*s'", grbn->realnamelen,
+			 grbn->realname);
+
+	grbn->rdclass = cm->view->rdclass;
+	grbn->rdtype = client->rdtype;
+
+	rdataset = levent->rdataset;
+	if (rdataset != NULL) {
+		/* The normal case */
+		grbn->nrdatas = dns_rdataset_count(rdataset);
+		grbn->rdatas = isc_mem_get(cm->mctx, grbn->nrdatas *
+					   sizeof(unsigned char *));
+		if (grbn->rdatas == NULL)
+			goto out;
+		grbn->rdatalen = isc_mem_get(cm->mctx, grbn->nrdatas *
+					     sizeof(uint16_t));
+		if (grbn->rdatalen == NULL)
+			goto out;
+
+		i = 0;
+		result = fill_array(&i, rdataset, grbn->nrdatas, grbn->rdatas,
+				    grbn->rdatalen);
+		if (result != ISC_R_SUCCESS)
+			goto out;
+		INSIST(i == grbn->nrdatas);
+		grbn->ttl = rdataset->ttl;
+		if (rdataset->trust == dns_trust_secure)
+			grbn->flags |= LWRDATA_VALIDATED;
+	} else {
+		/* The SIG query case */
+		result = iterate_node(grbn, levent->db, levent->node,
+				      cm->mctx);
+		if (result != ISC_R_SUCCESS)
+			goto out;
+	}
+	ns_lwdclient_log(50, "filled in %d rdata%s", grbn->nrdatas,
+			 (grbn->nrdatas == 1) ? "" : "s");
+
+	sigrdataset = levent->sigrdataset;
+	if (sigrdataset != NULL) {
+		grbn->nsigs = dns_rdataset_count(sigrdataset);
+		grbn->sigs = isc_mem_get(cm->mctx, grbn->nsigs *
+					 sizeof(unsigned char *));
+		if (grbn->sigs == NULL)
+			goto out;
+		grbn->siglen = isc_mem_get(cm->mctx, grbn->nsigs *
+					   sizeof(uint16_t));
+		if (grbn->siglen == NULL)
+			goto out;
+
+		i = 0;
+		result = fill_array(&i, sigrdataset, grbn->nsigs, grbn->sigs,
+				    grbn->siglen);
+		if (result != ISC_R_SUCCESS)
+			goto out;
+		INSIST(i == grbn->nsigs);
+		ns_lwdclient_log(50, "filled in %d signature%s", grbn->nsigs,
+				 (grbn->nsigs == 1) ? "" : "s");
+	}
+
+	/*
+	 * Render the packet.
+	 */
+	client->pkt.recvlength = LWRES_RECVLENGTH;
+	client->pkt.authtype = 0; /* XXXMLG */
+	client->pkt.authlength = 0;
+	client->pkt.result = LWRES_R_SUCCESS;
+
+	lwresult = lwres_grbnresponse_render(cm->lwctx,
+					     grbn, &client->pkt, &lwb);
+	if (lwresult != LWRES_R_SUCCESS)
+		goto out;
+
+	isc_mem_put(cm->mctx, grbn->rdatas,
+		    grbn->nrdatas * sizeof(unsigned char *));
+	isc_mem_put(cm->mctx, grbn->rdatalen,
+		    grbn->nrdatas * sizeof(uint16_t));
+
+	if (grbn->sigs != NULL)
+		isc_mem_put(cm->mctx, grbn->sigs,
+			    grbn->nsigs * sizeof(unsigned char *));
+	if (grbn->siglen != NULL)
+		isc_mem_put(cm->mctx, grbn->siglen,
+			    grbn->nsigs * sizeof(uint16_t));
+
+	r.base = lwb.base;
+	r.length = lwb.used;
+	client->sendbuf = r.base;
+	client->sendlength = r.length;
+	result = ns_lwdclient_sendreply(client, &r);
+	if (result != ISC_R_SUCCESS)
+		goto out2;
+
+	NS_LWDCLIENT_SETSEND(client);
+
+	dns_lookup_destroy(&client->lookup);
+	isc_event_free(&event);
+
+	return;
+
+ out:
+	if (grbn->rdatas != NULL)
+		isc_mem_put(cm->mctx, grbn->rdatas,
+			    grbn->nrdatas * sizeof(unsigned char *));
+	if (grbn->rdatalen != NULL)
+		isc_mem_put(cm->mctx, grbn->rdatalen,
+			    grbn->nrdatas * sizeof(uint16_t));
+
+	if (grbn->sigs != NULL)
+		isc_mem_put(cm->mctx, grbn->sigs,
+			    grbn->nsigs * sizeof(unsigned char *));
+	if (grbn->siglen != NULL)
+		isc_mem_put(cm->mctx, grbn->siglen,
+			    grbn->nsigs * sizeof(uint16_t));
+ out2:
+	if (client->lookup != NULL)
+		dns_lookup_destroy(&client->lookup);
+	if (lwb.base != NULL)
+		lwres_context_freemem(cm->lwctx, lwb.base, lwb.length);
+
+	isc_event_free(&event);
+
+	ns_lwdclient_log(50, "error constructing getrrsetbyname response");
+	ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
+}
+
+static void
+start_lookup(ns_lwdclient_t *client) {
+	isc_result_t result;
+	ns_lwdclientmgr_t *cm;
+	dns_fixedname_t absname;
+
+	cm = client->clientmgr;
+
+	INSIST(client->lookup == NULL);
+
+	dns_fixedname_init(&absname);
+
+	/*
+	 * Perform search across all search domains until success
+	 * is returned. Return in case of failure.
+	 */
+	while (ns_lwsearchctx_current(&client->searchctx,
+			dns_fixedname_name(&absname)) != ISC_R_SUCCESS) {
+		if (ns_lwsearchctx_next(&client->searchctx) != ISC_R_SUCCESS) {
+			ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
+			return;
+		}
+	}
+
+	result = dns_lookup_create(cm->mctx,
+				   dns_fixedname_name(&absname),
+				   client->rdtype, cm->view,
+				   client->options, cm->task, lookup_done,
+				   client, &client->lookup);
+	if (result != ISC_R_SUCCESS) {
+		ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
+		return;
+	}
+}
+
+static void
+init_grbn(ns_lwdclient_t *client) {
+	client->grbn.rdclass = 0;
+	client->grbn.rdtype = 0;
+	client->grbn.ttl = 0;
+	client->grbn.nrdatas = 0;
+	client->grbn.realname = NULL;
+	client->grbn.realnamelen = 0;
+	client->grbn.rdatas = 0;
+	client->grbn.rdatalen = 0;
+	client->grbn.base = NULL;
+	client->grbn.baselen = 0;
+	isc_buffer_init(&client->recv_buffer, client->buffer, LWRES_RECVLENGTH);
+}
+
+void
+ns_lwdclient_processgrbn(ns_lwdclient_t *client, lwres_buffer_t *b) {
+	lwres_grbnrequest_t *req;
+	isc_result_t result;
+	ns_lwdclientmgr_t *cm;
+	isc_buffer_t namebuf;
+
+	REQUIRE(NS_LWDCLIENT_ISRECVDONE(client));
+	INSIST(client->byaddr == NULL);
+
+	cm = client->clientmgr;
+	req = NULL;
+
+	result = lwres_grbnrequest_parse(cm->lwctx,
+					 b, &client->pkt, &req);
+	if (result != LWRES_R_SUCCESS)
+		goto out;
+	if (req->name == NULL)
+		goto out;
+
+	client->options = 0;
+	if (req->rdclass != cm->view->rdclass)
+		goto out;
+
+	if (req->rdclass == dns_rdataclass_any ||
+	    req->rdtype == dns_rdatatype_any)
+		goto out;
+
+	client->rdtype = req->rdtype;
+
+	isc_buffer_init(&namebuf, req->name, req->namelen);
+	isc_buffer_add(&namebuf, req->namelen);
+
+	dns_fixedname_init(&client->query_name);
+	result = dns_name_fromtext(dns_fixedname_name(&client->query_name),
+				   &namebuf, NULL, 0, NULL);
+	if (result != ISC_R_SUCCESS)
+		goto out;
+	ns_lwsearchctx_init(&client->searchctx,
+			    cm->listener->manager->search,
+			    dns_fixedname_name(&client->query_name),
+			    cm->listener->manager->ndots);
+	ns_lwsearchctx_first(&client->searchctx);
+
+	ns_lwdclient_log(50, "client %p looking for type %d",
+			 client, client->rdtype);
+
+	/*
+	 * We no longer need to keep this around.
+	 */
+	lwres_grbnrequest_free(cm->lwctx, &req);
+
+	/*
+	 * Initialize the real name and alias arrays in the reply we're
+	 * going to build up.
+	 */
+	init_grbn(client);
+
+	/*
+	 * Start the find.
+	 */
+	start_lookup(client);
+
+	return;
+
+	/*
+	 * We're screwed.  Return an error packet to our caller.
+	 */
+ out:
+	if (req != NULL)
+		lwres_grbnrequest_free(cm->lwctx, &req);
+
+	ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
+}