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https://github.com/samba-team/samba.git
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235 lines
6.2 KiB
C
235 lines
6.2 KiB
C
/*
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Unix SMB/CIFS implementation.
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make nbt name query requests
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Copyright (C) Andrew Tridgell 2005
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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 "../libcli/nbt/libnbt.h"
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#include "../libcli/nbt/nbt_proto.h"
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#include "lib/socket/socket.h"
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/**
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send a nbt name query
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*/
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_PUBLIC_ struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
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struct nbt_name_query *io)
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{
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struct nbt_name_request *req;
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struct nbt_name_packet *packet;
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struct socket_address *dest;
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packet = talloc_zero(nbtsock, struct nbt_name_packet);
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if (packet == NULL) return NULL;
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packet->qdcount = 1;
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packet->operation = NBT_OPCODE_QUERY;
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if (io->in.broadcast) {
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packet->operation |= NBT_FLAG_BROADCAST;
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}
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if (io->in.wins_lookup) {
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packet->operation |= NBT_FLAG_RECURSION_DESIRED;
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}
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packet->questions = talloc_array(packet, struct nbt_name_question, 1);
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if (packet->questions == NULL) goto failed;
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packet->questions[0].name = io->in.name;
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packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
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packet->questions[0].question_class = NBT_QCLASS_IP;
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dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
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io->in.dest_addr, io->in.dest_port);
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if (dest == NULL) goto failed;
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req = nbt_name_request_send(nbtsock, dest, packet,
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io->in.timeout, io->in.retries, false);
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if (req == NULL) goto failed;
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talloc_free(packet);
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return req;
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failed:
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talloc_free(packet);
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return NULL;
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}
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/**
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wait for a name query reply
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*/
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_PUBLIC_ NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
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TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
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{
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NTSTATUS status;
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struct nbt_name_packet *packet;
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int i;
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status = nbt_name_request_recv(req);
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if (!NT_STATUS_IS_OK(status) ||
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req->num_replies == 0) {
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talloc_free(req);
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return status;
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}
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packet = req->replies[0].packet;
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io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
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if ((packet->operation & NBT_RCODE) != 0) {
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status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
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talloc_free(req);
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return status;
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}
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if (packet->ancount != 1 ||
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packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
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packet->answers[0].rr_class != NBT_QCLASS_IP) {
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talloc_free(req);
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return status;
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}
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io->out.name = packet->answers[0].name;
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io->out.num_addrs = packet->answers[0].rdata.netbios.length / 6;
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io->out.reply_addrs = talloc_array(mem_ctx, const char *, io->out.num_addrs+1);
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if (io->out.reply_addrs == NULL) {
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talloc_free(req);
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return NT_STATUS_NO_MEMORY;
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}
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for (i=0;i<io->out.num_addrs;i++) {
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io->out.reply_addrs[i] = talloc_steal(io->out.reply_addrs,
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packet->answers[0].rdata.netbios.addresses[i].ipaddr);
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}
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io->out.reply_addrs[i] = NULL;
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talloc_steal(mem_ctx, io->out.name.name);
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talloc_steal(mem_ctx, io->out.name.scope);
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talloc_free(req);
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return NT_STATUS_OK;
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}
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/**
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wait for a name query reply
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*/
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_PUBLIC_ NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
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TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
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{
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struct nbt_name_request *req = nbt_name_query_send(nbtsock, io);
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return nbt_name_query_recv(req, mem_ctx, io);
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}
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/**
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send a nbt name status
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*/
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_PUBLIC_ struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
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struct nbt_name_status *io)
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{
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struct nbt_name_request *req;
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struct nbt_name_packet *packet;
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struct socket_address *dest;
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packet = talloc_zero(nbtsock, struct nbt_name_packet);
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if (packet == NULL) return NULL;
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packet->qdcount = 1;
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packet->operation = NBT_OPCODE_QUERY;
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packet->questions = talloc_array(packet, struct nbt_name_question, 1);
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if (packet->questions == NULL) goto failed;
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packet->questions[0].name = io->in.name;
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packet->questions[0].question_type = NBT_QTYPE_STATUS;
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packet->questions[0].question_class = NBT_QCLASS_IP;
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dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
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io->in.dest_addr, io->in.dest_port);
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if (dest == NULL) goto failed;
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req = nbt_name_request_send(nbtsock, dest, packet,
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io->in.timeout, io->in.retries, false);
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if (req == NULL) goto failed;
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talloc_free(packet);
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return req;
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failed:
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talloc_free(packet);
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return NULL;
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}
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/**
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wait for a name status reply
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*/
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_PUBLIC_ NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
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TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
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{
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NTSTATUS status;
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struct nbt_name_packet *packet;
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int i;
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status = nbt_name_request_recv(req);
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if (!NT_STATUS_IS_OK(status) ||
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req->num_replies == 0) {
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talloc_free(req);
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return status;
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}
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packet = req->replies[0].packet;
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io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
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if ((packet->operation & NBT_RCODE) != 0) {
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status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
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talloc_free(req);
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return status;
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}
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if (packet->ancount != 1 ||
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packet->answers[0].rr_type != NBT_QTYPE_STATUS ||
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packet->answers[0].rr_class != NBT_QCLASS_IP) {
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talloc_free(req);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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io->out.name = packet->answers[0].name;
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talloc_steal(mem_ctx, io->out.name.name);
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talloc_steal(mem_ctx, io->out.name.scope);
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io->out.status = packet->answers[0].rdata.status;
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talloc_steal(mem_ctx, io->out.status.names);
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for (i=0;i<io->out.status.num_names;i++) {
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talloc_steal(io->out.status.names, io->out.status.names[i].name);
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}
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talloc_free(req);
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return NT_STATUS_OK;
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}
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/**
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wait for a name status reply
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*/
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_PUBLIC_ NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
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TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
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{
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struct nbt_name_request *req = nbt_name_status_send(nbtsock, io);
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return nbt_name_status_recv(req, mem_ctx, io);
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}
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