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-rw-r--r--libcli/nbt/namerefresh.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/libcli/nbt/namerefresh.c b/libcli/nbt/namerefresh.c
new file mode 100644
index 0000000000..77f9cbd45c
--- /dev/null
+++ b/libcli/nbt/namerefresh.c
@@ -0,0 +1,302 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ send out a name refresh 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 "../libcli/nbt/libnbt.h"
+#include "../libcli/nbt/nbt_proto.h"
+#include "libcli/composite/composite.h"
+#include "lib/socket/socket.h"
+#include "param/param.h"
+
+/*
+ send a nbt name refresh request
+*/
+struct nbt_name_request *nbt_name_refresh_send(struct nbt_name_socket *nbtsock,
+ struct nbt_name_refresh *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;
+ packet->operation = NBT_OPCODE_REFRESH;
+ if (io->in.broadcast) {
+ packet->operation |= NBT_FLAG_BROADCAST;
+ }
+
+ 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);
+
+ dest = socket_address_from_strings(nbtsock,
+ nbtsock->sock->backend_name,
+ io->in.dest_addr, io->in.dest_port);
+ if (dest == NULL) goto failed;
+ req = nbt_name_request_send(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 refresh reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh_recv(struct nbt_name_request *req,
+ TALLOC_CTX *mem_ctx, struct nbt_name_refresh *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 refresh request
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh(struct nbt_name_socket *nbtsock,
+ TALLOC_CTX *mem_ctx, struct nbt_name_refresh *io)
+{
+ struct nbt_name_request *req = nbt_name_refresh_send(nbtsock, io);
+ return nbt_name_refresh_recv(req, mem_ctx, io);
+}
+
+
+
+/**
+ a wins name refresh with multiple WINS servers and multiple
+ addresses to refresh. Try each WINS server in turn, until we get a
+ reply for each address
+*/
+struct refresh_wins_state {
+ struct nbt_name_socket *nbtsock;
+ struct nbt_name_refresh *io;
+ const char **wins_servers;
+ uint16_t wins_port;
+ const char **addresses;
+ int address_idx;
+ struct nbt_name_request *req;
+};
+
+
+/**
+ state handler for WINS multi-homed multi-server name refresh
+*/
+static void name_refresh_wins_handler(struct nbt_name_request *req)
+{
+ struct composite_context *c = talloc_get_type(req->async.private_data,
+ struct composite_context);
+ struct refresh_wins_state *state = talloc_get_type(c->private_data,
+ struct refresh_wins_state);
+ NTSTATUS status;
+
+ status = nbt_name_refresh_recv(state->req, state, state->io);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+ /* the refresh timed out - try the next WINS server */
+ state->wins_servers++;
+ state->address_idx = 0;
+ if (state->wins_servers[0] == NULL) {
+ c->state = COMPOSITE_STATE_ERROR;
+ c->status = status;
+ goto done;
+ }
+ state->io->in.dest_addr = state->wins_servers[0];
+ state->io->in.dest_port = state->wins_port;
+ state->io->in.address = state->addresses[0];
+ state->req = nbt_name_refresh_send(state->nbtsock, state->io);
+ if (state->req == NULL) {
+ c->state = COMPOSITE_STATE_ERROR;
+ c->status = NT_STATUS_NO_MEMORY;
+ } else {
+ state->req->async.fn = name_refresh_wins_handler;
+ state->req->async.private_data = c;
+ }
+ } else if (!NT_STATUS_IS_OK(status)) {
+ c->state = COMPOSITE_STATE_ERROR;
+ c->status = status;
+ } else {
+ if (state->io->out.rcode == 0 &&
+ state->addresses[state->address_idx+1] != NULL) {
+ /* refresh our next address */
+ state->io->in.address = state->addresses[++(state->address_idx)];
+ state->req = nbt_name_refresh_send(state->nbtsock, state->io);
+ if (state->req == NULL) {
+ c->state = COMPOSITE_STATE_ERROR;
+ c->status = NT_STATUS_NO_MEMORY;
+ } else {
+ state->req->async.fn = name_refresh_wins_handler;
+ state->req->async.private_data = c;
+ }
+ } else {
+ c->state = COMPOSITE_STATE_DONE;
+ c->status = NT_STATUS_OK;
+ }
+ }
+
+done:
+ if (c->state >= COMPOSITE_STATE_DONE &&
+ c->async.fn) {
+ c->async.fn(c);
+ }
+}
+
+/**
+ the async send call for a multi-server WINS refresh
+*/
+_PUBLIC_ struct composite_context *nbt_name_refresh_wins_send(struct nbt_name_socket *nbtsock,
+ struct nbt_name_refresh_wins *io)
+{
+ struct composite_context *c;
+ struct refresh_wins_state *state;
+
+ c = talloc_zero(nbtsock, struct composite_context);
+ if (c == NULL) goto failed;
+
+ state = talloc(c, struct refresh_wins_state);
+ if (state == NULL) goto failed;
+
+ state->io = talloc(state, struct nbt_name_refresh);
+ if (state->io == NULL) goto failed;
+
+ state->wins_port = io->in.wins_port;
+ state->wins_servers = (const char **)str_list_copy(state, io->in.wins_servers);
+ if (state->wins_servers == NULL ||
+ state->wins_servers[0] == NULL) goto failed;
+
+ state->addresses = (const char **)str_list_copy(state, io->in.addresses);
+ if (state->addresses == NULL ||
+ state->addresses[0] == NULL) goto failed;
+
+ 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.ttl = io->in.ttl;
+ state->io->in.timeout = 2;
+ state->io->in.retries = 2;
+
+ state->nbtsock = nbtsock;
+ state->address_idx = 0;
+
+ state->req = nbt_name_refresh_send(nbtsock, state->io);
+ if (state->req == NULL) goto failed;
+
+ state->req->async.fn = name_refresh_wins_handler;
+ state->req->async.private_data = c;
+
+ c->private_data = state;
+ c->state = COMPOSITE_STATE_IN_PROGRESS;
+ c->event_ctx = nbtsock->event_ctx;
+
+ return c;
+
+failed:
+ talloc_free(c);
+ return NULL;
+}
+
+/*
+ multi-homed WINS name refresh - recv side
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh_wins_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+ struct nbt_name_refresh_wins *io)
+{
+ NTSTATUS status;
+ status = composite_wait(c);
+ if (NT_STATUS_IS_OK(status)) {
+ struct refresh_wins_state *state =
+ talloc_get_type(c->private_data, struct refresh_wins_state);
+ io->out.wins_server = talloc_steal(mem_ctx, state->wins_servers[0]);
+ io->out.rcode = state->io->out.rcode;
+ }
+ talloc_free(c);
+ return status;
+}
+
+/*
+ multi-homed WINS refresh - sync interface
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh_wins(struct nbt_name_socket *nbtsock,
+ TALLOC_CTX *mem_ctx,
+ struct nbt_name_refresh_wins *io)
+{
+ struct composite_context *c = nbt_name_refresh_wins_send(nbtsock, io);
+ return nbt_name_refresh_wins_recv(c, mem_ctx, io);
+}