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-rw-r--r--bin/named/lwdgnba.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/bin/named/lwdgnba.c b/bin/named/lwdgnba.c
new file mode 100644
index 0000000..9e600f5
--- /dev/null
+++ b/bin/named/lwdgnba.c
@@ -0,0 +1,264 @@
+/*
+ * 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: lwdgnba.c,v 1.22 2008/01/14 23:46:56 tbox Exp $ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <isc/socket.h>
+#include <isc/string.h> /* Required for HP/UX (and others?) */
+#include <isc/util.h>
+
+#include <dns/adb.h>
+#include <dns/byaddr.h>
+#include <dns/result.h>
+
+#include <named/types.h>
+#include <named/lwdclient.h>
+
+static void start_byaddr(ns_lwdclient_t *);
+
+static void
+byaddr_done(isc_task_t *task, isc_event_t *event) {
+ ns_lwdclient_t *client;
+ ns_lwdclientmgr_t *cm;
+ dns_byaddrevent_t *bevent;
+ int lwres;
+ lwres_buffer_t lwb;
+ dns_name_t *name;
+ isc_result_t result;
+ lwres_result_t lwresult;
+ isc_region_t r;
+ isc_buffer_t b;
+ lwres_gnbaresponse_t *gnba;
+ uint16_t naliases;
+
+ UNUSED(task);
+
+ lwb.base = NULL;
+ client = event->ev_arg;
+ cm = client->clientmgr;
+ INSIST(client->byaddr == (dns_byaddr_t *)event->ev_sender);
+
+ bevent = (dns_byaddrevent_t *)event;
+ gnba = &client->gnba;
+
+ ns_lwdclient_log(50, "byaddr event result = %s",
+ isc_result_totext(bevent->result));
+
+ result = bevent->result;
+ if (result != ISC_R_SUCCESS) {
+ dns_byaddr_destroy(&client->byaddr);
+ isc_event_free(&event);
+ bevent = NULL;
+
+ if (client->na.family != AF_INET6 ||
+ (client->options & DNS_BYADDROPT_IPV6INT) != 0) {
+ if (result == DNS_R_NCACHENXDOMAIN ||
+ result == DNS_R_NCACHENXRRSET ||
+ result == DNS_R_NXDOMAIN ||
+ result == DNS_R_NXRRSET)
+ lwresult = LWRES_R_NOTFOUND;
+ else
+ lwresult = LWRES_R_FAILURE;
+ ns_lwdclient_errorpktsend(client, lwresult);
+ return;
+ }
+
+ /*
+ * Fall back to ip6.int reverse if the default ip6.arpa
+ * fails.
+ */
+ client->options |= DNS_BYADDROPT_IPV6INT;
+
+ start_byaddr(client);
+ return;
+ }
+
+ for (name = ISC_LIST_HEAD(bevent->names);
+ name != NULL;
+ name = ISC_LIST_NEXT(name, link))
+ {
+ b = client->recv_buffer;
+
+ result = dns_name_totext(name, true, &client->recv_buffer);
+ if (result != ISC_R_SUCCESS)
+ goto out;
+ ns_lwdclient_log(50, "found name '%.*s'",
+ (int)(client->recv_buffer.used - b.used),
+ (char *)(b.base) + b.used);
+ if (gnba->realname == NULL) {
+ gnba->realname = (char *)(b.base) + b.used;
+ gnba->realnamelen = client->recv_buffer.used - b.used;
+ } else {
+ naliases = gnba->naliases;
+ if (naliases >= LWRES_MAX_ALIASES)
+ break;
+ gnba->aliases[naliases] = (char *)(b.base) + b.used;
+ gnba->aliaslen[naliases] =
+ client->recv_buffer.used - b.used;
+ gnba->naliases++;
+ }
+ }
+
+ dns_byaddr_destroy(&client->byaddr);
+ isc_event_free(&event);
+
+ /*
+ * Render the packet.
+ */
+ client->pkt.recvlength = LWRES_RECVLENGTH;
+ client->pkt.authtype = 0; /* XXXMLG */
+ client->pkt.authlength = 0;
+ client->pkt.result = LWRES_R_SUCCESS;
+
+ lwres = lwres_gnbaresponse_render(cm->lwctx,
+ gnba, &client->pkt, &lwb);
+ if (lwres != LWRES_R_SUCCESS)
+ goto out;
+
+ 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 out;
+
+ NS_LWDCLIENT_SETSEND(client);
+
+ return;
+
+ out:
+ if (client->byaddr != NULL)
+ dns_byaddr_destroy(&client->byaddr);
+ if (lwb.base != NULL)
+ lwres_context_freemem(cm->lwctx,
+ lwb.base, lwb.length);
+
+ if (event != NULL)
+ isc_event_free(&event);
+}
+
+static void
+start_byaddr(ns_lwdclient_t *client) {
+ isc_result_t result;
+ ns_lwdclientmgr_t *cm;
+
+ cm = client->clientmgr;
+
+ INSIST(client->byaddr == NULL);
+
+ result = dns_byaddr_create(cm->mctx, &client->na, cm->view,
+ client->options, cm->task, byaddr_done,
+ client, &client->byaddr);
+ if (result != ISC_R_SUCCESS) {
+ ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
+ return;
+ }
+}
+
+static void
+init_gnba(ns_lwdclient_t *client) {
+ int i;
+
+ /*
+ * Initialize the real name and alias arrays in the reply we're
+ * going to build up.
+ */
+ for (i = 0; i < LWRES_MAX_ALIASES; i++) {
+ client->aliases[i] = NULL;
+ client->aliaslen[i] = 0;
+ }
+ for (i = 0; i < LWRES_MAX_ADDRS; i++) {
+ client->addrs[i].family = 0;
+ client->addrs[i].length = 0;
+ memset(client->addrs[i].address, 0, LWRES_ADDR_MAXLEN);
+ LWRES_LINK_INIT(&client->addrs[i], link);
+ }
+
+ client->gnba.naliases = 0;
+ client->gnba.realname = NULL;
+ client->gnba.aliases = client->aliases;
+ client->gnba.realnamelen = 0;
+ client->gnba.aliaslen = client->aliaslen;
+ client->gnba.base = NULL;
+ client->gnba.baselen = 0;
+ isc_buffer_init(&client->recv_buffer, client->buffer, LWRES_RECVLENGTH);
+}
+
+void
+ns_lwdclient_processgnba(ns_lwdclient_t *client, lwres_buffer_t *b) {
+ lwres_gnbarequest_t *req;
+ isc_result_t result;
+ isc_sockaddr_t sa;
+ ns_lwdclientmgr_t *cm;
+
+ REQUIRE(NS_LWDCLIENT_ISRECVDONE(client));
+ INSIST(client->byaddr == NULL);
+
+ cm = client->clientmgr;
+ req = NULL;
+
+ result = lwres_gnbarequest_parse(cm->lwctx,
+ b, &client->pkt, &req);
+ if (result != LWRES_R_SUCCESS)
+ goto out;
+
+ client->options = 0;
+ if (req->addr.family == LWRES_ADDRTYPE_V4) {
+ client->na.family = AF_INET;
+ if (req->addr.length != 4)
+ goto out;
+ memmove(&client->na.type.in, req->addr.address, 4);
+ } else if (req->addr.family == LWRES_ADDRTYPE_V6) {
+ client->na.family = AF_INET6;
+ if (req->addr.length != 16)
+ goto out;
+ memmove(&client->na.type.in6, req->addr.address, 16);
+ } else {
+ goto out;
+ }
+ isc_sockaddr_fromnetaddr(&sa, &client->na, 53);
+
+ ns_lwdclient_log(50, "client %p looking for addrtype %08x",
+ client, req->addr.family);
+
+ /*
+ * We no longer need to keep this around.
+ */
+ lwres_gnbarequest_free(cm->lwctx, &req);
+
+ /*
+ * Initialize the real name and alias arrays in the reply we're
+ * going to build up.
+ */
+ init_gnba(client);
+ client->options = 0;
+
+ /*
+ * Start the find.
+ */
+ start_byaddr(client);
+
+ return;
+
+ /*
+ * We're screwed. Return an error packet to our caller.
+ */
+ out:
+ if (req != NULL)
+ lwres_gnbarequest_free(cm->lwctx, &req);
+
+ ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 04:32:14 +0000