2 * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000-2002 Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: lwdgnba.c,v 1.16.18.2 2005/04/29 00:15:24 marka Exp $ */
24 #include <isc/socket.h>
25 #include <isc/string.h> /* Required for HP/UX (and others?) */
29 #include <dns/byaddr.h>
30 #include <dns/result.h>
32 #include <named/types.h>
33 #include <named/lwdclient.h>
35 static void start_byaddr(ns_lwdclient_t *);
38 byaddr_done(isc_task_t *task, isc_event_t *event) {
39 ns_lwdclient_t *client;
40 ns_lwdclientmgr_t *cm;
41 dns_byaddrevent_t *bevent;
46 lwres_result_t lwresult;
49 lwres_gnbaresponse_t *gnba;
50 isc_uint16_t naliases;
55 client = event->ev_arg;
56 cm = client->clientmgr;
57 INSIST(client->byaddr == (dns_byaddr_t *)event->ev_sender);
59 bevent = (dns_byaddrevent_t *)event;
62 ns_lwdclient_log(50, "byaddr event result = %s",
63 isc_result_totext(bevent->result));
65 result = bevent->result;
66 if (result != ISC_R_SUCCESS) {
67 dns_byaddr_destroy(&client->byaddr);
68 isc_event_free(&event);
71 if (client->na.family != AF_INET6 ||
72 (client->options & DNS_BYADDROPT_IPV6INT) != 0) {
73 if (result == DNS_R_NCACHENXDOMAIN ||
74 result == DNS_R_NCACHENXRRSET ||
75 result == DNS_R_NXDOMAIN ||
76 result == DNS_R_NXRRSET)
77 lwresult = LWRES_R_NOTFOUND;
79 lwresult = LWRES_R_FAILURE;
80 ns_lwdclient_errorpktsend(client, lwresult);
85 * Fall back to ip6.int reverse if the default ip6.arpa
88 client->options |= DNS_BYADDROPT_IPV6INT;
94 for (name = ISC_LIST_HEAD(bevent->names);
96 name = ISC_LIST_NEXT(name, link))
98 b = client->recv_buffer;
100 result = dns_name_totext(name, ISC_TRUE, &client->recv_buffer);
101 if (result != ISC_R_SUCCESS)
103 ns_lwdclient_log(50, "found name '%.*s'",
104 (int)(client->recv_buffer.used - b.used),
105 (char *)(b.base) + b.used);
106 if (gnba->realname == NULL) {
107 gnba->realname = (char *)(b.base) + b.used;
108 gnba->realnamelen = client->recv_buffer.used - b.used;
110 naliases = gnba->naliases;
111 if (naliases >= LWRES_MAX_ALIASES)
113 gnba->aliases[naliases] = (char *)(b.base) + b.used;
114 gnba->aliaslen[naliases] =
115 client->recv_buffer.used - b.used;
120 dns_byaddr_destroy(&client->byaddr);
121 isc_event_free(&event);
126 client->pkt.recvlength = LWRES_RECVLENGTH;
127 client->pkt.authtype = 0; /* XXXMLG */
128 client->pkt.authlength = 0;
129 client->pkt.result = LWRES_R_SUCCESS;
131 lwres = lwres_gnbaresponse_render(cm->lwctx,
132 gnba, &client->pkt, &lwb);
133 if (lwres != LWRES_R_SUCCESS)
138 client->sendbuf = r.base;
139 client->sendlength = r.length;
140 result = ns_lwdclient_sendreply(client, &r);
141 if (result != ISC_R_SUCCESS)
144 NS_LWDCLIENT_SETSEND(client);
149 if (client->byaddr != NULL)
150 dns_byaddr_destroy(&client->byaddr);
151 if (lwb.base != NULL)
152 lwres_context_freemem(cm->lwctx,
153 lwb.base, lwb.length);
156 isc_event_free(&event);
160 start_byaddr(ns_lwdclient_t *client) {
162 ns_lwdclientmgr_t *cm;
164 cm = client->clientmgr;
166 INSIST(client->byaddr == NULL);
168 result = dns_byaddr_create(cm->mctx, &client->na, cm->view,
169 client->options, cm->task, byaddr_done,
170 client, &client->byaddr);
171 if (result != ISC_R_SUCCESS) {
172 ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
178 init_gnba(ns_lwdclient_t *client) {
182 * Initialize the real name and alias arrays in the reply we're
185 for (i = 0; i < LWRES_MAX_ALIASES; i++) {
186 client->aliases[i] = NULL;
187 client->aliaslen[i] = 0;
189 for (i = 0; i < LWRES_MAX_ADDRS; i++) {
190 client->addrs[i].family = 0;
191 client->addrs[i].length = 0;
192 memset(client->addrs[i].address, 0, LWRES_ADDR_MAXLEN);
193 LWRES_LINK_INIT(&client->addrs[i], link);
196 client->gnba.naliases = 0;
197 client->gnba.realname = NULL;
198 client->gnba.aliases = client->aliases;
199 client->gnba.realnamelen = 0;
200 client->gnba.aliaslen = client->aliaslen;
201 client->gnba.base = NULL;
202 client->gnba.baselen = 0;
203 isc_buffer_init(&client->recv_buffer, client->buffer, LWRES_RECVLENGTH);
207 ns_lwdclient_processgnba(ns_lwdclient_t *client, lwres_buffer_t *b) {
208 lwres_gnbarequest_t *req;
211 ns_lwdclientmgr_t *cm;
213 REQUIRE(NS_LWDCLIENT_ISRECVDONE(client));
214 INSIST(client->byaddr == NULL);
216 cm = client->clientmgr;
219 result = lwres_gnbarequest_parse(cm->lwctx,
220 b, &client->pkt, &req);
221 if (result != LWRES_R_SUCCESS)
223 if (req->addr.address == NULL)
227 if (req->addr.family == LWRES_ADDRTYPE_V4) {
228 client->na.family = AF_INET;
229 if (req->addr.length != 4)
231 memcpy(&client->na.type.in, req->addr.address, 4);
232 } else if (req->addr.family == LWRES_ADDRTYPE_V6) {
233 client->na.family = AF_INET6;
234 if (req->addr.length != 16)
236 memcpy(&client->na.type.in6, req->addr.address, 16);
240 isc_sockaddr_fromnetaddr(&sa, &client->na, 53);
242 ns_lwdclient_log(50, "client %p looking for addrtype %08x",
243 client, req->addr.family);
246 * We no longer need to keep this around.
248 lwres_gnbarequest_free(cm->lwctx, &req);
251 * Initialize the real name and alias arrays in the reply we're
260 start_byaddr(client);
265 * We're screwed. Return an error packet to our caller.
269 lwres_gnbarequest_free(cm->lwctx, &req);
271 ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);