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);
result = ns_lwsearchctx_current(&client->searchctx,
dns_fixedname_name(&absname));
/*
* This will return failure if relative name + suffix is too long.
* In this case, just go on to the next entry in the search path.
*/
if (result != ISC_R_SUCCESS)
start_lookup(client);
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;
}
}
void
ns_lwdclient_processnoop(ns_lwdclient_t *client, lwres_buffer_t *b) {
lwres_nooprequest_t *req;
lwres_noopresponse_t resp;
isc_result_t result;
lwres_result_t lwres;
isc_region_t r;
lwres_buffer_t lwb;
REQUIRE(NS_LWDCLIENT_ISRECVDONE(client));
INSIST(client->byaddr == NULL);
req = NULL;
result = lwres_nooprequest_parse(client->clientmgr->lwctx,
b, &client->pkt, &req);
if (result != LWRES_R_SUCCESS)
goto send_error;
client->pkt.recvlength = LWRES_RECVLENGTH;
client->pkt.authtype = 0; /* XXXMLG */
client->pkt.authlength = 0;
client->pkt.result = LWRES_R_SUCCESS;
resp.datalength = req->datalength;
resp.data = req->data;
lwres = lwres_noopresponse_render(client->clientmgr->lwctx, &resp,
&client->pkt, &lwb);
if (lwres != LWRES_R_SUCCESS)
goto cleanup_req;
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 cleanup_lwb;
/*
* We can now destroy request.
*/
lwres_nooprequest_free(client->clientmgr->lwctx, &req);
NS_LWDCLIENT_SETSEND(client);
return;
cleanup_lwb:
lwres_context_freemem(client->clientmgr->lwctx, lwb.base, lwb.length);
cleanup_req:
lwres_nooprequest_free(client->clientmgr->lwctx, &req);
send_error:
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
}
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
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;
isc_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, ISC_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);
}
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;
memcpy(&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;
memcpy(&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);
}
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);
}
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, ISC_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(lwres_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(lwres_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(lwres_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(lwres_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(lwres_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(lwres_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);
}
/*
* When we are called, we can be assured that:
*
* client->sockaddr contains the address we need to reply to,
*
* client->pkt contains the packet header data,
*
* the packet "checks out" overall -- any MD5 hashes or crypto
* bits have been verified,
*
* "b" points to the remaining data after the packet header
* was parsed off.
*
* We are in a the RECVDONE state.
*
* From this state we will enter the SEND state if we happen to have
* everything we need or we need to return an error packet, or to the
* FINDWAIT state if we need to look things up.
*/
void
ns_lwdclient_processgabn(ns_lwdclient_t *client, lwres_buffer_t *b) {
isc_result_t result;
lwres_gabnrequest_t *req;
ns_lwdclientmgr_t *cm;
isc_buffer_t namebuf;
REQUIRE(NS_LWDCLIENT_ISRECVDONE(client));
cm = client->clientmgr;
req = NULL;
result = lwres_gabnrequest_parse(client->clientmgr->lwctx,
b, &client->pkt, &req);
if (result != LWRES_R_SUCCESS)
goto out;
if (req->name == NULL)
goto out;
isc_buffer_init(&namebuf, req->name, req->namelen);
isc_buffer_add(&namebuf, req->namelen);
dns_fixedname_init(&client->target_name);
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);
client->find_wanted = req->addrtypes;
ns_lwdclient_log(50, "client %p looking for addrtypes %08x",
client, client->find_wanted);
/*
* We no longer need to keep this around.
*/
lwres_gabnrequest_free(client->clientmgr->lwctx, &req);
/*
* Start the find.
*/
result = start_find(client);
if (result != ISC_R_SUCCESS)
goto out;
return;
/*
* We're screwed. Return an error packet to our caller.
*/
out:
if (req != NULL)
lwres_gabnrequest_free(client->clientmgr->lwctx, &req);
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
}
static void
restart_find(ns_lwdclient_t *client) {
unsigned int options;
isc_result_t result;
isc_boolean_t claimed;
ns_lwdclient_log(50, "starting find for client %p", client);
/*
* Issue a find for the name contained in the request. We won't
* set the bit that says "anything is good enough" -- we want it
* all.
*/
options = 0;
options |= DNS_ADBFIND_WANTEVENT;
options |= DNS_ADBFIND_RETURNLAME;
/*
* Set the bits up here to mark that we want this address family
* and that we do not currently have a find pending. We will
* set that bit again below if it turns out we will get an event.
*/
if (NEED_V4(client))
options |= DNS_ADBFIND_INET;
if (NEED_V6(client))
options |= DNS_ADBFIND_INET6;
find_again:
INSIST(client->find == NULL);
result = dns_adb_createfind(client->clientmgr->view->adb,
client->clientmgr->task,
process_gabn_finddone, client,
dns_fixedname_name(&client->target_name),
dns_rootname, 0, options, 0,
dns_fixedname_name(&client->target_name),
client->clientmgr->view->dstport,
&client->find);
/*
* Did we get an alias? If so, save it and re-issue the query.
*/
if (result == DNS_R_ALIAS) {
ns_lwdclient_log(50, "found alias, restarting query");
dns_adb_destroyfind(&client->find);
cleanup_gabn(client);
result = add_alias(client);
if (result != ISC_R_SUCCESS) {
ns_lwdclient_log(50,
"out of buffer space adding alias");
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
return;
}
goto find_again;
}
ns_lwdclient_log(50, "find returned %d (%s)", result,
isc_result_totext(result));
/*
* Did we get an error?
*/
if (result != ISC_R_SUCCESS) {
if (client->find != NULL)
dns_adb_destroyfind(&client->find);
cleanup_gabn(client);
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
return;
}
claimed = ISC_FALSE;
/*
* Did we get our answer to V4 addresses?
*/
if (NEED_V4(client)
&& ((client->find->query_pending & DNS_ADBFIND_INET) == 0)) {
ns_lwdclient_log(50, "client %p ipv4 satisfied by find %p",
client, client->find);
claimed = ISC_TRUE;
client->v4find = client->find;
}
/*
* Did we get our answer to V6 addresses?
*/
if (NEED_V6(client)
&& ((client->find->query_pending & DNS_ADBFIND_INET6) == 0)) {
ns_lwdclient_log(50, "client %p ipv6 satisfied by find %p",
client, client->find);
claimed = ISC_TRUE;
client->v6find = client->find;
}
/*
* If we're going to get an event, set our internal pending flag
* and return. When we get an event back we'll do the right
* thing, basically by calling this function again, perhaps with a
* new target name.
*
* If we have both v4 and v6, and we are still getting an event,
* we have a programming error, so die hard.
*/
if ((client->find->options & DNS_ADBFIND_WANTEVENT) != 0) {
ns_lwdclient_log(50, "event will be sent");
INSIST(client->v4find == NULL || client->v6find == NULL);
return;
}
ns_lwdclient_log(50, "no event will be sent");
if (claimed)
client->find = NULL;
else
dns_adb_destroyfind(&client->find);
/*
* We seem to have everything we asked for, or at least we are
* able to respond with things we've learned.
*/
generate_reply(client);
}
static void
process_gabn_finddone(isc_task_t *task, isc_event_t *ev) {
ns_lwdclient_t *client = ev->ev_arg;
isc_eventtype_t evtype;
isc_boolean_t claimed;
ns_lwdclient_log(50, "find done for task %p, client %p", task, client);
evtype = ev->ev_type;
isc_event_free(&ev);
/*
* No more info to be had? If so, we have all the good stuff
* right now, so we can render things.
*/
claimed = ISC_FALSE;
if (evtype == DNS_EVENT_ADBNOMOREADDRESSES) {
if (NEED_V4(client)) {
client->v4find = client->find;
claimed = ISC_TRUE;
}
if (NEED_V6(client)) {
client->v6find = client->find;
claimed = ISC_TRUE;
}
if (client->find != NULL) {
if (claimed)
client->find = NULL;
else
dns_adb_destroyfind(&client->find);
}
generate_reply(client);
return;
}
/*
* We probably don't need this find anymore. We're either going to
* reissue it, or an error occurred. Either way, we're done with
* it.
*/
if ((client->find != client->v4find)
&& (client->find != client->v6find)) {
dns_adb_destroyfind(&client->find);
} else {
client->find = NULL;
}
/*
* We have some new information we can gather. Run off and fetch
* it.
*/
if (evtype == DNS_EVENT_ADBMOREADDRESSES) {
restart_find(client);
return;
}
/*
* An error or other strangeness happened. Drop this query.
*/
cleanup_gabn(client);
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
}
static void
generate_reply(ns_lwdclient_t *client) {
isc_result_t result;
int lwres;
isc_region_t r;
lwres_buffer_t lwb;
ns_lwdclientmgr_t *cm;
cm = client->clientmgr;
lwb.base = NULL;
ns_lwdclient_log(50, "generating gabn reply for client %p", client);
/*
* We must make certain the client->find is not still active.
* If it is either the v4 or v6 answer, just set it to NULL and
* let the cleanup code destroy it. Otherwise, destroy it now.
*/
if (client->find == client->v4find || client->find == client->v6find)
client->find = NULL;
else
if (client->find != NULL)
dns_adb_destroyfind(&client->find);
/*
* perhaps there are some here?
*/
if (NEED_V6(client) && client->v4find != NULL)
client->v6find = client->v4find;
/*
* Run through the finds we have and wire them up to the gabn
* structure.
*/
LWRES_LIST_INIT(client->gabn.addrs);
if (client->v4find != NULL)
setup_addresses(client, client->v4find, DNS_ADBFIND_INET);
if (client->v6find != NULL)
setup_addresses(client, client->v6find, DNS_ADBFIND_INET6);
/*
* If there are no addresses, try the next element in the search
* path, if there are any more. Otherwise, fall through into
* the error handling code below.
*/
if (client->gabn.naddrs == 0) {
do {
result = ns_lwsearchctx_next(&client->searchctx);
if (result == ISC_R_SUCCESS) {
cleanup_gabn(client);
result = start_find(client);
if (result == ISC_R_SUCCESS)
return;
}
} while (result == ISC_R_SUCCESS);
}
/*
* Render the packet.
*/
client->pkt.recvlength = LWRES_RECVLENGTH;
client->pkt.authtype = 0; /* XXXMLG */
client->pkt.authlength = 0;
/*
* If there are no addresses, return failure.
*/
if (client->gabn.naddrs != 0)
client->pkt.result = LWRES_R_SUCCESS;
else
client->pkt.result = LWRES_R_NOTFOUND;
sort_addresses(client);
lwres = lwres_gabnresponse_render(cm->lwctx, &client->gabn,
&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);
/*
* All done!
*/
cleanup_gabn(client);
return;
out:
cleanup_gabn(client);
if (lwb.base != NULL)
lwres_context_freemem(client->clientmgr->lwctx,
lwb.base, lwb.length);
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
}