mirror of
https://github.com/samba-team/samba.git
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0062a2f5fb
Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
687 lines
19 KiB
C
687 lines
19 KiB
C
/*
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Unix SMB/CIFS implementation.
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DNS server handler for queries
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Copyright (C) 2010 Kai Blin <kai@samba.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "smbd/service_task.h"
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#include "libcli/util/werror.h"
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#include "librpc/ndr/libndr.h"
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#include "librpc/gen_ndr/ndr_dns.h"
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#include "librpc/gen_ndr/ndr_dnsp.h"
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#include <ldb.h>
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#include "param/param.h"
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#include "dsdb/samdb/samdb.h"
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#include "dsdb/common/util.h"
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#include "dns_server/dns_server.h"
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#include "libcli/dns/libdns.h"
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#include "lib/util/util_net.h"
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#include "lib/util/tevent_werror.h"
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#include "auth/auth.h"
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#include "auth/credentials/credentials.h"
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#include "auth/gensec/gensec.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_DNS
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static WERROR create_response_rr(const struct dns_name_question *question,
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const struct dnsp_DnssrvRpcRecord *rec,
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struct dns_res_rec **answers, uint16_t *ancount)
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{
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struct dns_res_rec *ans = *answers;
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uint16_t ai = *ancount;
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char *tmp;
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uint32_t i;
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ZERO_STRUCT(ans[ai]);
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switch (rec->wType) {
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case DNS_QTYPE_CNAME:
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ans[ai].rdata.cname_record = talloc_strdup(ans, rec->data.cname);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.cname_record);
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break;
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case DNS_QTYPE_A:
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ans[ai].rdata.ipv4_record = talloc_strdup(ans, rec->data.ipv4);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.ipv4_record);
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break;
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case DNS_QTYPE_AAAA:
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ans[ai].rdata.ipv6_record = talloc_strdup(ans, rec->data.ipv6);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.ipv6_record);
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break;
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case DNS_TYPE_NS:
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ans[ai].rdata.ns_record = talloc_strdup(ans, rec->data.ns);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.ns_record);
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break;
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case DNS_QTYPE_SRV:
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ans[ai].rdata.srv_record.priority = rec->data.srv.wPriority;
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ans[ai].rdata.srv_record.weight = rec->data.srv.wWeight;
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ans[ai].rdata.srv_record.port = rec->data.srv.wPort;
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ans[ai].rdata.srv_record.target = talloc_strdup(
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ans, rec->data.srv.nameTarget);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.srv_record.target);
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break;
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case DNS_QTYPE_SOA:
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ans[ai].rdata.soa_record.mname = talloc_strdup(
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ans, rec->data.soa.mname);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.soa_record.mname);
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ans[ai].rdata.soa_record.rname = talloc_strdup(
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ans, rec->data.soa.rname);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].rdata.soa_record.rname);
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ans[ai].rdata.soa_record.serial = rec->data.soa.serial;
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ans[ai].rdata.soa_record.refresh = rec->data.soa.refresh;
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ans[ai].rdata.soa_record.retry = rec->data.soa.retry;
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ans[ai].rdata.soa_record.expire = rec->data.soa.expire;
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ans[ai].rdata.soa_record.minimum = rec->data.soa.minimum;
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break;
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case DNS_QTYPE_PTR:
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ans[ai].rdata.ptr_record = talloc_strdup(ans, rec->data.ptr);
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break;
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case DNS_QTYPE_MX:
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ans[ai].rdata.mx_record.preference = rec->data.mx.wPriority;
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ans[ai].rdata.mx_record.exchange = talloc_strdup(
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ans, rec->data.mx.nameTarget);
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if (ans[ai].rdata.mx_record.exchange == NULL) {
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return WERR_NOMEM;
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}
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break;
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case DNS_QTYPE_TXT:
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tmp = talloc_asprintf(ans, "\"%s\"", rec->data.txt.str[0]);
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W_ERROR_HAVE_NO_MEMORY(tmp);
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for (i=1; i<rec->data.txt.count; i++) {
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tmp = talloc_asprintf_append_buffer(
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tmp, " \"%s\"", rec->data.txt.str[i]);
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W_ERROR_HAVE_NO_MEMORY(tmp);
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}
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ans[ai].rdata.txt_record.txt = tmp;
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break;
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default:
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DEBUG(0, ("Got unhandled type %u query.\n", rec->wType));
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return DNS_ERR(NOT_IMPLEMENTED);
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}
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ans[ai].name = talloc_strdup(ans, question->name);
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W_ERROR_HAVE_NO_MEMORY(ans[ai].name);
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ans[ai].rr_type = rec->wType;
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ans[ai].rr_class = DNS_QCLASS_IN;
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ans[ai].ttl = rec->dwTtlSeconds;
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ans[ai].length = UINT16_MAX;
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ai++;
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*answers = ans;
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*ancount = ai;
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return WERR_OK;
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}
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struct ask_forwarder_state {
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struct tevent_context *ev;
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uint16_t id;
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struct dns_name_packet in_packet;
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};
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static void ask_forwarder_done(struct tevent_req *subreq);
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static struct tevent_req *ask_forwarder_send(
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struct dns_server *dns,
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TALLOC_CTX *mem_ctx, struct tevent_context *ev,
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const char *forwarder, struct dns_name_question *question)
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{
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struct tevent_req *req, *subreq;
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struct ask_forwarder_state *state;
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struct dns_res_rec *options;
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struct dns_name_packet out_packet = { 0, };
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DATA_BLOB out_blob;
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enum ndr_err_code ndr_err;
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WERROR werr;
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req = tevent_req_create(mem_ctx, &state, struct ask_forwarder_state);
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if (req == NULL) {
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return NULL;
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}
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state->ev = ev;
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generate_random_buffer((uint8_t *)&state->id, sizeof(state->id));
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if (!is_ipaddress(forwarder)) {
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DEBUG(0, ("Invalid 'dns forwarder' setting '%s', needs to be "
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"an IP address\n", forwarder));
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tevent_req_werror(req, DNS_ERR(NAME_ERROR));
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return tevent_req_post(req, ev);
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}
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out_packet.id = state->id;
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out_packet.operation |= DNS_OPCODE_QUERY | DNS_FLAG_RECURSION_DESIRED;
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out_packet.qdcount = 1;
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out_packet.questions = question;
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werr = dns_generate_options(dns, state, &options);
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if (!W_ERROR_IS_OK(werr)) {
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tevent_req_werror(req, werr);
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return tevent_req_post(req, ev);
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}
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out_packet.arcount = 1;
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out_packet.additional = options;
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ndr_err = ndr_push_struct_blob(
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&out_blob, state, &out_packet,
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(ndr_push_flags_fn_t)ndr_push_dns_name_packet);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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tevent_req_werror(req, DNS_ERR(SERVER_FAILURE));
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return tevent_req_post(req, ev);
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}
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subreq = dns_udp_request_send(state, ev, forwarder, out_blob.data,
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out_blob.length);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, ask_forwarder_done, req);
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return req;
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}
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static void ask_forwarder_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct ask_forwarder_state *state = tevent_req_data(
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req, struct ask_forwarder_state);
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DATA_BLOB in_blob;
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enum ndr_err_code ndr_err;
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WERROR ret;
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ret = dns_udp_request_recv(subreq, state,
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&in_blob.data, &in_blob.length);
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TALLOC_FREE(subreq);
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if (tevent_req_werror(req, ret)) {
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return;
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}
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ndr_err = ndr_pull_struct_blob(
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&in_blob, state, &state->in_packet,
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(ndr_pull_flags_fn_t)ndr_pull_dns_name_packet);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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tevent_req_werror(req, DNS_ERR(SERVER_FAILURE));
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return;
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}
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if (state->in_packet.id != state->id) {
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tevent_req_werror(req, DNS_ERR(NAME_ERROR));
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return;
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}
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tevent_req_done(req);
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}
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static WERROR ask_forwarder_recv(
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struct tevent_req *req, TALLOC_CTX *mem_ctx,
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struct dns_res_rec **answers, uint16_t *ancount,
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struct dns_res_rec **nsrecs, uint16_t *nscount,
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struct dns_res_rec **additional, uint16_t *arcount)
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{
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struct ask_forwarder_state *state = tevent_req_data(
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req, struct ask_forwarder_state);
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struct dns_name_packet *in_packet = &state->in_packet;
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WERROR err;
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if (tevent_req_is_werror(req, &err)) {
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return err;
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}
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*ancount = in_packet->ancount;
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*answers = talloc_move(mem_ctx, &in_packet->answers);
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*nscount = in_packet->nscount;
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*nsrecs = talloc_move(mem_ctx, &in_packet->nsrecs);
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*arcount = in_packet->arcount;
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*additional = talloc_move(mem_ctx, &in_packet->additional);
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return WERR_OK;
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}
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static WERROR handle_question(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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const struct dns_name_question *question,
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struct dns_res_rec **answers, uint16_t *ancount)
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{
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struct dns_res_rec *ans = *answers;
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WERROR werror, werror_return;
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unsigned int ri;
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struct dnsp_DnssrvRpcRecord *recs;
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uint16_t rec_count, ai = *ancount;
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struct ldb_dn *dn = NULL;
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werror = dns_name2dn(dns, mem_ctx, question->name, &dn);
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W_ERROR_NOT_OK_RETURN(werror);
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werror = dns_lookup_records(dns, mem_ctx, dn, &recs, &rec_count);
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W_ERROR_NOT_OK_RETURN(werror);
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ans = talloc_realloc(mem_ctx, ans, struct dns_res_rec, rec_count + ai);
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if (ans == NULL) {
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return WERR_NOMEM;
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}
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/* Set up for an NXDOMAIN reply if no match is found */
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werror_return = DNS_ERR(NAME_ERROR);
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for (ri = 0; ri < rec_count; ri++) {
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if ((recs[ri].wType == DNS_TYPE_CNAME) &&
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((question->question_type == DNS_QTYPE_A) ||
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(question->question_type == DNS_QTYPE_AAAA))) {
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struct dns_name_question *new_q =
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talloc(mem_ctx, struct dns_name_question);
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if (new_q == NULL) {
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return WERR_NOMEM;
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}
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/* We reply with one more record, so grow the array */
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ans = talloc_realloc(mem_ctx, ans, struct dns_res_rec,
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rec_count + 1);
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if (ans == NULL) {
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TALLOC_FREE(new_q);
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return WERR_NOMEM;
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}
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/* First put in the CNAME record */
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werror = create_response_rr(question, &recs[ri], &ans, &ai);
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if (!W_ERROR_IS_OK(werror)) {
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return werror;
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}
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/* And then look up the name it points at.. */
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/* First build up the new question */
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new_q->question_type = question->question_type;
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new_q->question_class = question->question_class;
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if (new_q->question_type == DNS_QTYPE_A) {
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new_q->name = talloc_strdup(new_q, recs[ri].data.ipv4);
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} else if (new_q->question_type == DNS_QTYPE_AAAA) {
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new_q->name = talloc_strdup(new_q, recs[ri].data.ipv6);
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}
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if (new_q->name == NULL) {
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TALLOC_FREE(new_q);
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return WERR_NOMEM;
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}
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/* and then call the lookup again */
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werror = handle_question(dns, mem_ctx, new_q, &ans, &ai);
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if (!W_ERROR_IS_OK(werror)) {
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return werror;
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}
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werror_return = WERR_OK;
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continue;
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}
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if ((question->question_type != DNS_QTYPE_ALL) &&
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(recs[ri].wType != (enum dns_record_type) question->question_type)) {
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werror_return = WERR_OK;
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continue;
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}
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werror = create_response_rr(question, &recs[ri], &ans, &ai);
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if (!W_ERROR_IS_OK(werror)) {
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return werror;
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}
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werror_return = WERR_OK;
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}
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*ancount = ai;
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*answers = ans;
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return werror_return;
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}
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static NTSTATUS create_tkey(struct dns_server *dns,
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const char* name,
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const char* algorithm,
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struct dns_server_tkey **tkey)
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{
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NTSTATUS status;
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struct dns_server_tkey_store *store = dns->tkeys;
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struct dns_server_tkey *k = talloc_zero(store, struct dns_server_tkey);
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if (k == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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k->name = talloc_strdup(k, name);
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if (k->name == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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k->algorithm = talloc_strdup(k, algorithm);
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if (k->algorithm == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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status = samba_server_gensec_start(k,
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dns->task->event_ctx,
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dns->task->msg_ctx,
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dns->task->lp_ctx,
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dns->server_credentials,
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"dns",
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&k->gensec);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
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*tkey = NULL;
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return status;
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}
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gensec_want_feature(k->gensec, GENSEC_FEATURE_SIGN);
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status = gensec_start_mech_by_oid(k->gensec, GENSEC_OID_SPNEGO);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("Failed to start GENSEC server code: %s\n",
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nt_errstr(status)));
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*tkey = NULL;
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return status;
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}
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if (store->tkeys[store->next_idx] != NULL) {
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TALLOC_FREE(store->tkeys[store->next_idx]);
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}
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store->tkeys[store->next_idx] = k;
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(store->next_idx)++;
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store->next_idx %= store->size;
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*tkey = k;
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return NT_STATUS_OK;
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}
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static NTSTATUS accept_gss_ticket(TALLOC_CTX *mem_ctx,
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struct dns_server *dns,
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struct dns_server_tkey *tkey,
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const DATA_BLOB *key,
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DATA_BLOB *reply,
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uint16_t *dns_auth_error)
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{
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NTSTATUS status;
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status = gensec_update_ev(tkey->gensec, mem_ctx, dns->task->event_ctx,
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*key, reply);
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if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
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*dns_auth_error = DNS_RCODE_OK;
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return status;
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}
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if (NT_STATUS_IS_OK(status)) {
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status = gensec_session_info(tkey->gensec, tkey, &tkey->session_info);
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if (!NT_STATUS_IS_OK(status)) {
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*dns_auth_error = DNS_RCODE_BADKEY;
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return status;
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}
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*dns_auth_error = DNS_RCODE_OK;
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}
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return status;
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}
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static WERROR handle_tkey(struct dns_server *dns,
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TALLOC_CTX *mem_ctx,
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const struct dns_name_packet *in,
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struct dns_request_state *state,
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struct dns_res_rec **answers,
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uint16_t *ancount)
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{
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struct dns_res_rec *in_tkey = NULL;
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struct dns_res_rec *ret_tkey;
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uint16_t i;
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for (i = 0; i < in->arcount; i++) {
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if (in->additional[i].rr_type == DNS_QTYPE_TKEY) {
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in_tkey = &in->additional[i];
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break;
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}
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}
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/* If this is a TKEY query, it should have a TKEY RR.
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* Behaviour is not really specified in RFC 2930 or RFC 3645, but
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* FORMAT_ERROR seems to be what BIND uses .*/
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if (in_tkey == NULL) {
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return DNS_ERR(FORMAT_ERROR);
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}
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|
|
ret_tkey = talloc_zero(mem_ctx, struct dns_res_rec);
|
|
if (ret_tkey == NULL) {
|
|
return WERR_NOMEM;
|
|
}
|
|
|
|
ret_tkey->name = talloc_strdup(ret_tkey, in_tkey->name);
|
|
if (ret_tkey->name == NULL) {
|
|
return WERR_NOMEM;
|
|
}
|
|
|
|
ret_tkey->rr_type = DNS_QTYPE_TKEY;
|
|
ret_tkey->rr_class = DNS_QCLASS_ANY;
|
|
ret_tkey->length = UINT16_MAX;
|
|
|
|
ret_tkey->rdata.tkey_record.algorithm = talloc_strdup(ret_tkey,
|
|
in_tkey->rdata.tkey_record.algorithm);
|
|
if (ret_tkey->rdata.tkey_record.algorithm == NULL) {
|
|
return WERR_NOMEM;
|
|
}
|
|
|
|
ret_tkey->rdata.tkey_record.inception = in_tkey->rdata.tkey_record.inception;
|
|
ret_tkey->rdata.tkey_record.expiration = in_tkey->rdata.tkey_record.expiration;
|
|
ret_tkey->rdata.tkey_record.mode = in_tkey->rdata.tkey_record.mode;
|
|
|
|
switch (in_tkey->rdata.tkey_record.mode) {
|
|
case DNS_TKEY_MODE_DH:
|
|
/* FIXME: According to RFC 2930, we MUST support this, but we don't.
|
|
* Still, claim it's a bad key instead of a bad mode */
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_BADKEY;
|
|
break;
|
|
case DNS_TKEY_MODE_GSSAPI: {
|
|
NTSTATUS status;
|
|
struct dns_server_tkey *tkey;
|
|
DATA_BLOB key;
|
|
DATA_BLOB reply;
|
|
|
|
tkey = dns_find_tkey(dns->tkeys, in->questions[0].name);
|
|
if (tkey != NULL && tkey->complete) {
|
|
/* TODO: check if the key is still valid */
|
|
DEBUG(1, ("Rejecting tkey negotiation for already established key\n"));
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_BADNAME;
|
|
break;
|
|
}
|
|
|
|
if (tkey == NULL) {
|
|
status = create_tkey(dns, in->questions[0].name,
|
|
in_tkey->rdata.tkey_record.algorithm,
|
|
&tkey);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_BADKEY;
|
|
return ntstatus_to_werror(status);
|
|
}
|
|
}
|
|
|
|
key.data = in_tkey->rdata.tkey_record.key_data;
|
|
key.length = in_tkey->rdata.tkey_record.key_size;
|
|
|
|
status = accept_gss_ticket(ret_tkey, dns, tkey, &key, &reply,
|
|
&ret_tkey->rdata.tkey_record.error);
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
|
|
DEBUG(1, ("More processing required\n"));
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_BADKEY;
|
|
} else if (NT_STATUS_IS_OK(status)) {
|
|
DEBUG(1, ("Tkey handshake completed\n"));
|
|
ret_tkey->rdata.tkey_record.key_size = reply.length;
|
|
ret_tkey->rdata.tkey_record.key_data = talloc_memdup(ret_tkey,
|
|
reply.data,
|
|
reply.length);
|
|
state->sign = true;
|
|
state->key_name = talloc_strdup(state->mem_ctx, tkey->name);
|
|
if (state->key_name == NULL) {
|
|
return WERR_NOMEM;
|
|
}
|
|
} else {
|
|
DEBUG(1, ("GSS key negotiation returned %s\n", nt_errstr(status)));
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_BADKEY;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case DNS_TKEY_MODE_DELETE:
|
|
/* TODO: implement me */
|
|
DEBUG(1, ("Should delete tkey here\n"));
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_OK;
|
|
break;
|
|
case DNS_TKEY_MODE_NULL:
|
|
case DNS_TKEY_MODE_SERVER:
|
|
case DNS_TKEY_MODE_CLIENT:
|
|
case DNS_TKEY_MODE_LAST:
|
|
/* We don't have to implement these, return a mode error */
|
|
ret_tkey->rdata.tkey_record.error = DNS_RCODE_BADMODE;
|
|
break;
|
|
default:
|
|
DEBUG(1, ("Unsupported TKEY mode %d\n",
|
|
in_tkey->rdata.tkey_record.mode));
|
|
}
|
|
|
|
*answers = ret_tkey;
|
|
*ancount = 1;
|
|
|
|
return WERR_OK;
|
|
}
|
|
|
|
struct dns_server_process_query_state {
|
|
struct dns_res_rec *answers;
|
|
uint16_t ancount;
|
|
struct dns_res_rec *nsrecs;
|
|
uint16_t nscount;
|
|
struct dns_res_rec *additional;
|
|
uint16_t arcount;
|
|
};
|
|
|
|
static void dns_server_process_query_got_response(struct tevent_req *subreq);
|
|
|
|
struct tevent_req *dns_server_process_query_send(
|
|
TALLOC_CTX *mem_ctx, struct tevent_context *ev,
|
|
struct dns_server *dns, struct dns_request_state *req_state,
|
|
const struct dns_name_packet *in)
|
|
{
|
|
struct tevent_req *req, *subreq;
|
|
struct dns_server_process_query_state *state;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct dns_server_process_query_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
if (in->qdcount != 1) {
|
|
tevent_req_werror(req, DNS_ERR(FORMAT_ERROR));
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
/* Windows returns NOT_IMPLEMENTED on this as well */
|
|
if (in->questions[0].question_class == DNS_QCLASS_NONE) {
|
|
tevent_req_werror(req, DNS_ERR(NOT_IMPLEMENTED));
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (in->questions[0].question_type == DNS_QTYPE_TKEY) {
|
|
WERROR err;
|
|
|
|
err = handle_tkey(dns, state, in, req_state,
|
|
&state->answers, &state->ancount);
|
|
if (tevent_req_werror(req, err)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_done(req);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (dns_authorative_for_zone(dns, in->questions[0].name)) {
|
|
WERROR err;
|
|
|
|
req_state->flags |= DNS_FLAG_AUTHORITATIVE;
|
|
err = handle_question(dns, state, &in->questions[0],
|
|
&state->answers, &state->ancount);
|
|
if (tevent_req_werror(req, err)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_done(req);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if ((req_state->flags & DNS_FLAG_RECURSION_DESIRED) &&
|
|
(req_state->flags & DNS_FLAG_RECURSION_AVAIL)) {
|
|
DEBUG(2, ("Not authoritative for '%s', forwarding\n",
|
|
in->questions[0].name));
|
|
|
|
subreq = ask_forwarder_send(
|
|
dns,
|
|
state, ev, lpcfg_dns_forwarder(dns->task->lp_ctx),
|
|
&in->questions[0]);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_set_callback(
|
|
subreq, dns_server_process_query_got_response, req);
|
|
return req;
|
|
}
|
|
|
|
tevent_req_werror(req, DNS_ERR(NAME_ERROR));
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
static void dns_server_process_query_got_response(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req = tevent_req_callback_data(
|
|
subreq, struct tevent_req);
|
|
struct dns_server_process_query_state *state = tevent_req_data(
|
|
req, struct dns_server_process_query_state);
|
|
WERROR err;
|
|
|
|
err = ask_forwarder_recv(subreq, state,
|
|
&state->answers, &state->ancount,
|
|
&state->nsrecs, &state->nscount,
|
|
&state->additional, &state->arcount);
|
|
TALLOC_FREE(subreq);
|
|
if (tevent_req_werror(req, err)) {
|
|
return;
|
|
}
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
WERROR dns_server_process_query_recv(
|
|
struct tevent_req *req, TALLOC_CTX *mem_ctx,
|
|
struct dns_res_rec **answers, uint16_t *ancount,
|
|
struct dns_res_rec **nsrecs, uint16_t *nscount,
|
|
struct dns_res_rec **additional, uint16_t *arcount)
|
|
{
|
|
struct dns_server_process_query_state *state = tevent_req_data(
|
|
req, struct dns_server_process_query_state);
|
|
WERROR err;
|
|
|
|
if (tevent_req_is_werror(req, &err)) {
|
|
return err;
|
|
}
|
|
*answers = talloc_move(mem_ctx, &state->answers);
|
|
*ancount = state->ancount;
|
|
*nsrecs = talloc_move(mem_ctx, &state->nsrecs);
|
|
*nscount = state->nscount;
|
|
*additional = talloc_move(mem_ctx, &state->additional);
|
|
*arcount = state->arcount;
|
|
return WERR_OK;
|
|
}
|