/libcli/nbt/nameregister.c
C | 514 lines | 364 code | 82 blank | 68 comment | 65 complexity | 28fbb62fa226d68d6fa66d9793558dbb MD5 | raw file
- /*
- Unix SMB/CIFS implementation.
- send out a name registration request
- Copyright (C) Andrew Tridgell 2005
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "includes.h"
- #include <tevent.h>
- #include "../libcli/nbt/libnbt.h"
- #include "../libcli/nbt/nbt_proto.h"
- #include "lib/socket/socket.h"
- #include "librpc/gen_ndr/ndr_nbt.h"
- #include "../lib/util/tevent_ntstatus.h"
- /*
- send a nbt name registration request
- */
- struct nbt_name_request *nbt_name_register_send(struct nbt_name_socket *nbtsock,
- struct nbt_name_register *io)
- {
- struct nbt_name_request *req;
- struct nbt_name_packet *packet;
- struct socket_address *dest;
- packet = talloc_zero(nbtsock, struct nbt_name_packet);
- if (packet == NULL) return NULL;
- packet->qdcount = 1;
- packet->arcount = 1;
- if (io->in.multi_homed) {
- packet->operation = NBT_OPCODE_MULTI_HOME_REG;
- } else {
- packet->operation = NBT_OPCODE_REGISTER;
- }
- if (io->in.broadcast) {
- packet->operation |= NBT_FLAG_BROADCAST;
- }
- if (io->in.register_demand) {
- packet->operation |= NBT_FLAG_RECURSION_DESIRED;
- }
- packet->questions = talloc_array(packet, struct nbt_name_question, 1);
- if (packet->questions == NULL) goto failed;
- packet->questions[0].name = io->in.name;
- packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
- packet->questions[0].question_class = NBT_QCLASS_IP;
- packet->additional = talloc_array(packet, struct nbt_res_rec, 1);
- if (packet->additional == NULL) goto failed;
- packet->additional[0].name = io->in.name;
- packet->additional[0].rr_type = NBT_QTYPE_NETBIOS;
- packet->additional[0].rr_class = NBT_QCLASS_IP;
- packet->additional[0].ttl = io->in.ttl;
- packet->additional[0].rdata.netbios.length = 6;
- packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional,
- struct nbt_rdata_address, 1);
- if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed;
- packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags;
- packet->additional[0].rdata.netbios.addresses[0].ipaddr =
- talloc_strdup(packet->additional, io->in.address);
- if (packet->additional[0].rdata.netbios.addresses[0].ipaddr == NULL) goto failed;
- dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
- io->in.dest_addr, io->in.dest_port);
- if (dest == NULL) goto failed;
- req = nbt_name_request_send(nbtsock, nbtsock, dest, packet,
- io->in.timeout, io->in.retries, false);
- if (req == NULL) goto failed;
- talloc_free(packet);
- return req;
- failed:
- talloc_free(packet);
- return NULL;
- }
- /*
- wait for a registration reply
- */
- _PUBLIC_ NTSTATUS nbt_name_register_recv(struct nbt_name_request *req,
- TALLOC_CTX *mem_ctx, struct nbt_name_register *io)
- {
- NTSTATUS status;
- struct nbt_name_packet *packet;
- status = nbt_name_request_recv(req);
- if (!NT_STATUS_IS_OK(status) ||
- req->num_replies == 0) {
- talloc_free(req);
- return status;
- }
- packet = req->replies[0].packet;
- io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
- if (packet->ancount != 1 ||
- packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
- packet->answers[0].rr_class != NBT_QCLASS_IP) {
- talloc_free(req);
- return NT_STATUS_INVALID_NETWORK_RESPONSE;
- }
- io->out.rcode = packet->operation & NBT_RCODE;
- io->out.name = packet->answers[0].name;
- if (packet->answers[0].rdata.netbios.length < 6) {
- talloc_free(req);
- return NT_STATUS_INVALID_NETWORK_RESPONSE;
- }
- io->out.reply_addr = talloc_steal(mem_ctx,
- packet->answers[0].rdata.netbios.addresses[0].ipaddr);
- talloc_steal(mem_ctx, io->out.name.name);
- talloc_steal(mem_ctx, io->out.name.scope);
- talloc_free(req);
- return NT_STATUS_OK;
- }
- /*
- synchronous name registration request
- */
- _PUBLIC_ NTSTATUS nbt_name_register(struct nbt_name_socket *nbtsock,
- TALLOC_CTX *mem_ctx, struct nbt_name_register *io)
- {
- struct nbt_name_request *req = nbt_name_register_send(nbtsock, io);
- return nbt_name_register_recv(req, mem_ctx, io);
- }
- /*
- a 4 step broadcast registration. 3 lots of name registration requests, followed by
- a name registration demand
- */
- struct nbt_name_register_bcast_state {
- struct nbt_name_socket *nbtsock;
- struct nbt_name_register io;
- };
- static void nbt_name_register_bcast_handler(struct nbt_name_request *subreq);
- /*
- the async send call for a 4 stage name registration
- */
- _PUBLIC_ struct tevent_req *nbt_name_register_bcast_send(TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- struct nbt_name_socket *nbtsock,
- struct nbt_name_register_bcast *io)
- {
- struct tevent_req *req;
- struct nbt_name_register_bcast_state *state;
- struct nbt_name_request *subreq;
- req = tevent_req_create(mem_ctx, &state,
- struct nbt_name_register_bcast_state);
- if (req == NULL) {
- return NULL;
- }
- state->io.in.name = io->in.name;
- state->io.in.dest_addr = io->in.dest_addr;
- state->io.in.dest_port = io->in.dest_port;
- state->io.in.address = io->in.address;
- state->io.in.nb_flags = io->in.nb_flags;
- state->io.in.register_demand = false;
- state->io.in.broadcast = true;
- state->io.in.multi_homed = false;
- state->io.in.ttl = io->in.ttl;
- state->io.in.timeout = 1;
- state->io.in.retries = 2;
- state->nbtsock = nbtsock;
- subreq = nbt_name_register_send(nbtsock, &state->io);
- if (tevent_req_nomem(subreq, req)) {
- return tevent_req_post(req, ev);
- }
- subreq->async.fn = nbt_name_register_bcast_handler;
- subreq->async.private_data = req;
- return req;
- }
- static void nbt_name_register_bcast_handler(struct nbt_name_request *subreq)
- {
- struct tevent_req *req =
- talloc_get_type_abort(subreq->async.private_data,
- struct tevent_req);
- struct nbt_name_register_bcast_state *state =
- tevent_req_data(req,
- struct nbt_name_register_bcast_state);
- NTSTATUS status;
- status = nbt_name_register_recv(subreq, state, &state->io);
- if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
- if (state->io.in.register_demand == true) {
- tevent_req_done(req);
- return;
- }
- /* the registration timed out - good, send the demand */
- state->io.in.register_demand = true;
- state->io.in.retries = 0;
- subreq = nbt_name_register_send(state->nbtsock, &state->io);
- if (tevent_req_nomem(subreq, req)) {
- return;
- }
- subreq->async.fn = nbt_name_register_bcast_handler;
- subreq->async.private_data = req;
- return;
- }
- if (!NT_STATUS_IS_OK(status)) {
- tevent_req_nterror(req, status);
- return;
- }
- DEBUG(3,("Name registration conflict from %s for %s with ip %s - rcode %d\n",
- state->io.out.reply_from,
- nbt_name_string(state, &state->io.out.name),
- state->io.out.reply_addr,
- state->io.out.rcode));
- tevent_req_nterror(req, NT_STATUS_CONFLICTING_ADDRESSES);
- }
- /*
- broadcast 4 part name register - recv
- */
- _PUBLIC_ NTSTATUS nbt_name_register_bcast_recv(struct tevent_req *req)
- {
- NTSTATUS status;
- if (tevent_req_is_nterror(req, &status)) {
- tevent_req_received(req);
- return status;
- }
- tevent_req_received(req);
- return NT_STATUS_OK;
- }
- /*
- broadcast 4 part name register - sync interface
- */
- NTSTATUS nbt_name_register_bcast(struct nbt_name_socket *nbtsock,
- struct nbt_name_register_bcast *io)
- {
- TALLOC_CTX *frame = talloc_stackframe();
- struct tevent_context *ev;
- struct tevent_req *subreq;
- NTSTATUS status;
- /*
- * TODO: create a temporary event context
- */
- ev = nbtsock->event_ctx;
- subreq = nbt_name_register_bcast_send(frame, ev, nbtsock, io);
- if (subreq == NULL) {
- talloc_free(frame);
- return NT_STATUS_NO_MEMORY;
- }
- if (!tevent_req_poll(subreq, ev)) {
- status = map_nt_error_from_unix_common(errno);
- talloc_free(frame);
- return status;
- }
- status = nbt_name_register_bcast_recv(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(frame);
- return status;
- }
- TALLOC_FREE(frame);
- return NT_STATUS_OK;
- }
- /*
- a wins name register with multiple WINS servers and multiple
- addresses to register. Try each WINS server in turn, until we get a
- reply for each address
- */
- struct nbt_name_register_wins_state {
- struct nbt_name_socket *nbtsock;
- struct nbt_name_register io;
- char **wins_servers;
- uint16_t wins_port;
- char **addresses;
- uint32_t address_idx;
- };
- static void nbt_name_register_wins_handler(struct nbt_name_request *subreq);
- /*
- the async send call for a multi-server WINS register
- */
- _PUBLIC_ struct tevent_req *nbt_name_register_wins_send(TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- struct nbt_name_socket *nbtsock,
- struct nbt_name_register_wins *io)
- {
- struct tevent_req *req;
- struct nbt_name_register_wins_state *state;
- struct nbt_name_request *subreq;
- req = tevent_req_create(mem_ctx, &state,
- struct nbt_name_register_wins_state);
- if (req == NULL) {
- return NULL;
- }
- if (io->in.wins_servers == NULL) {
- tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
- return tevent_req_post(req, ev);
- }
- if (io->in.wins_servers[0] == NULL) {
- tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
- return tevent_req_post(req, ev);
- }
- if (io->in.addresses == NULL) {
- tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
- return tevent_req_post(req, ev);
- }
- if (io->in.addresses[0] == NULL) {
- tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
- return tevent_req_post(req, ev);
- }
- state->wins_port = io->in.wins_port;
- state->wins_servers = str_list_copy(state, io->in.wins_servers);
- if (tevent_req_nomem(state->wins_servers, req)) {
- return tevent_req_post(req, ev);
- }
- state->addresses = str_list_copy(state, io->in.addresses);
- if (tevent_req_nomem(state->addresses, req)) {
- return tevent_req_post(req, ev);
- }
- state->io.in.name = io->in.name;
- state->io.in.dest_addr = state->wins_servers[0];
- state->io.in.dest_port = state->wins_port;
- state->io.in.address = io->in.addresses[0];
- state->io.in.nb_flags = io->in.nb_flags;
- state->io.in.broadcast = false;
- state->io.in.register_demand = false;
- state->io.in.multi_homed = (io->in.nb_flags & NBT_NM_GROUP)?false:true;
- state->io.in.ttl = io->in.ttl;
- state->io.in.timeout = 3;
- state->io.in.retries = 2;
- state->nbtsock = nbtsock;
- state->address_idx = 0;
- subreq = nbt_name_register_send(nbtsock, &state->io);
- if (tevent_req_nomem(subreq, req)) {
- return tevent_req_post(req, ev);
- }
- subreq->async.fn = nbt_name_register_wins_handler;
- subreq->async.private_data = req;
- return req;
- }
- /*
- state handler for WINS multi-homed multi-server name register
- */
- static void nbt_name_register_wins_handler(struct nbt_name_request *subreq)
- {
- struct tevent_req *req =
- talloc_get_type_abort(subreq->async.private_data,
- struct tevent_req);
- struct nbt_name_register_wins_state *state =
- tevent_req_data(req,
- struct nbt_name_register_wins_state);
- NTSTATUS status;
- status = nbt_name_register_recv(subreq, state, &state->io);
- if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
- /* the register timed out - try the next WINS server */
- state->wins_servers++;
- if (state->wins_servers[0] == NULL) {
- tevent_req_nterror(req, status);
- return;
- }
- state->address_idx = 0;
- state->io.in.dest_addr = state->wins_servers[0];
- state->io.in.dest_port = state->wins_port;
- state->io.in.address = state->addresses[0];
- subreq = nbt_name_register_send(state->nbtsock, &state->io);
- if (tevent_req_nomem(subreq, req)) {
- return;
- }
- subreq->async.fn = nbt_name_register_wins_handler;
- subreq->async.private_data = req;
- return;
- }
- if (!NT_STATUS_IS_OK(status)) {
- tevent_req_nterror(req, status);
- return;
- }
- if (state->io.out.rcode == 0 &&
- state->addresses[state->address_idx+1] != NULL) {
- /* register our next address */
- state->io.in.address = state->addresses[++(state->address_idx)];
- subreq = nbt_name_register_send(state->nbtsock, &state->io);
- if (tevent_req_nomem(subreq, req)) {
- return;
- }
- subreq->async.fn = nbt_name_register_wins_handler;
- subreq->async.private_data = req;
- return;
- }
- tevent_req_done(req);
- }
- /*
- multi-homed WINS name register - recv side
- */
- _PUBLIC_ NTSTATUS nbt_name_register_wins_recv(struct tevent_req *req,
- TALLOC_CTX *mem_ctx,
- struct nbt_name_register_wins *io)
- {
- struct nbt_name_register_wins_state *state =
- tevent_req_data(req,
- struct nbt_name_register_wins_state);
- NTSTATUS status;
- if (tevent_req_is_nterror(req, &status)) {
- tevent_req_received(req);
- return status;
- }
- io->out.wins_server = talloc_move(mem_ctx, &state->wins_servers[0]);
- io->out.rcode = state->io.out.rcode;
- tevent_req_received(req);
- return NT_STATUS_OK;
- }
- /*
- multi-homed WINS register - sync interface
- */
- _PUBLIC_ NTSTATUS nbt_name_register_wins(struct nbt_name_socket *nbtsock,
- TALLOC_CTX *mem_ctx,
- struct nbt_name_register_wins *io)
- {
- TALLOC_CTX *frame = talloc_stackframe();
- struct tevent_context *ev;
- struct tevent_req *subreq;
- NTSTATUS status;
- /*
- * TODO: create a temporary event context
- */
- ev = nbtsock->event_ctx;
- subreq = nbt_name_register_wins_send(frame, ev, nbtsock, io);
- if (subreq == NULL) {
- talloc_free(frame);
- return NT_STATUS_NO_MEMORY;
- }
- if (!tevent_req_poll(subreq, ev)) {
- status = map_nt_error_from_unix_common(errno);
- talloc_free(frame);
- return status;
- }
- status = nbt_name_register_wins_recv(subreq, mem_ctx, io);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(frame);
- return status;
- }
- TALLOC_FREE(frame);
- return NT_STATUS_OK;
- }