mirror of
https://github.com/samba-team/samba.git
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r10113: rename libcli/wins to libcli/wrepl
metze
(This used to be commit d8b84112bb
)
This commit is contained in:
committed by
Gerald (Jerry) Carter
parent
899ffd9ba0
commit
63ef3c7fdc
701
source4/libcli/wrepl/winsrepl.c
Normal file
701
source4/libcli/wrepl/winsrepl.c
Normal file
@ -0,0 +1,701 @@
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/*
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Unix SMB/CIFS implementation.
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low level WINS replication client code
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "lib/events/events.h"
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#include "dlinklist.h"
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#include "lib/socket/socket.h"
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#include "libcli/wrepl/winsrepl.h"
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/*
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mark all pending requests as dead - called when a socket error happens
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*/
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static void wrepl_socket_dead(struct wrepl_socket *wrepl_socket)
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{
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event_set_fd_flags(wrepl_socket->fde, 0);
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while (wrepl_socket->send_queue) {
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struct wrepl_request *req = wrepl_socket->send_queue;
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DLIST_REMOVE(wrepl_socket->send_queue, req);
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req->state = WREPL_REQUEST_ERROR;
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req->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
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if (req->async.fn) {
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req->async.fn(req);
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}
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}
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while (wrepl_socket->recv_queue) {
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struct wrepl_request *req = wrepl_socket->recv_queue;
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DLIST_REMOVE(wrepl_socket->recv_queue, req);
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req->state = WREPL_REQUEST_ERROR;
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req->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
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if (req->async.fn) {
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req->async.fn(req);
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}
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}
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}
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/*
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handle send events
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*/
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static void wrepl_handler_send(struct wrepl_socket *wrepl_socket)
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{
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while (wrepl_socket->send_queue) {
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struct wrepl_request *req = wrepl_socket->send_queue;
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size_t nsent;
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NTSTATUS status;
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status = socket_send(wrepl_socket->sock, &req->buffer, &nsent, 0);
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if (NT_STATUS_IS_ERR(status)) {
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wrepl_socket_dead(wrepl_socket);
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return;
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}
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if (!NT_STATUS_IS_OK(status) || nsent == 0) return;
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req->buffer.data += nsent;
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req->buffer.length -= nsent;
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if (req->buffer.length != 0) {
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return;
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}
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DLIST_REMOVE(wrepl_socket->send_queue, req);
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DLIST_ADD_END(wrepl_socket->recv_queue, req, struct wrepl_request *);
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req->state = WREPL_REQUEST_RECV;
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EVENT_FD_READABLE(wrepl_socket->fde);
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}
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EVENT_FD_NOT_WRITEABLE(wrepl_socket->fde);
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}
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/*
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handle recv events
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*/
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static void wrepl_handler_recv(struct wrepl_socket *wrepl_socket)
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{
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size_t nread;
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struct wrepl_request *req = wrepl_socket->recv_queue;
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DATA_BLOB blob;
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if (req == NULL) {
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EVENT_FD_NOT_READABLE(wrepl_socket->fde);
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return;
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}
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if (req->buffer.length == 0) {
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req->buffer = data_blob_talloc(req, NULL, 4);
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if (req->buffer.data == NULL) {
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req->status = NT_STATUS_NO_MEMORY;
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goto failed;
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}
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req->num_read = 0;
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}
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/* read in the packet length */
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if (req->num_read < 4) {
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uint32_t req_length;
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req->status = socket_recv(wrepl_socket->sock,
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req->buffer.data + req->num_read,
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4 - req->num_read,
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&nread, 0);
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if (NT_STATUS_IS_ERR(req->status)) goto failed;
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if (!NT_STATUS_IS_OK(req->status)) return;
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req->num_read += nread;
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if (req->num_read != 4) return;
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req_length = RIVAL(req->buffer.data, 0) + 4;
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req->buffer.data = talloc_realloc(req, req->buffer.data,
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uint8_t, req_length);
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if (req->buffer.data == NULL) {
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req->status = NT_STATUS_NO_MEMORY;
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goto failed;
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}
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req->buffer.length = req_length;
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}
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/* read in the body */
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req->status = socket_recv(wrepl_socket->sock,
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req->buffer.data + req->num_read,
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req->buffer.length - req->num_read,
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&nread, 0);
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if (NT_STATUS_IS_ERR(req->status)) goto failed;
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if (!NT_STATUS_IS_OK(req->status)) return;
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req->num_read += nread;
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if (req->num_read != req->buffer.length) return;
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req->packet = talloc(req, struct wrepl_packet);
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if (req->packet == NULL) {
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req->status = NT_STATUS_NO_MEMORY;
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goto failed;
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}
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blob.data = req->buffer.data + 4;
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blob.length = req->buffer.length - 4;
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/* we have a full request - parse it */
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req->status = ndr_pull_struct_blob(&blob,
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req->packet, req->packet,
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(ndr_pull_flags_fn_t)ndr_pull_wrepl_packet);
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if (!NT_STATUS_IS_OK(req->status)) {
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DEBUG(2,("Failed to parse incoming WINS packet - %s\n",
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nt_errstr(req->status)));
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DEBUG(10,("packet length %d\n", (int)req->buffer.length));
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NDR_PRINT_DEBUG(wrepl_packet, req->packet);
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goto failed;
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}
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if (DEBUGLVL(10)) {
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DEBUG(10,("Received WINS packet of length %d\n", (int)req->buffer.length));
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NDR_PRINT_DEBUG(wrepl_packet, req->packet);
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}
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DLIST_REMOVE(wrepl_socket->recv_queue, req);
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req->state = WREPL_REQUEST_DONE;
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if (req->async.fn) {
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req->async.fn(req);
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}
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return;
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failed:
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if (req->state == WREPL_REQUEST_RECV) {
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DLIST_REMOVE(wrepl_socket->recv_queue, req);
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}
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req->state = WREPL_REQUEST_ERROR;
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if (req->async.fn) {
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req->async.fn(req);
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}
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}
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/*
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handler for winrepl events
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*/
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static void wrepl_handler(struct event_context *ev, struct fd_event *fde,
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uint16_t flags, void *private)
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{
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struct wrepl_socket *wrepl_socket = talloc_get_type(private,
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struct wrepl_socket);
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if (flags & EVENT_FD_WRITE) {
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wrepl_handler_send(wrepl_socket);
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}
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if (flags & EVENT_FD_READ) {
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wrepl_handler_recv(wrepl_socket);
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}
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}
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/*
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handler for winrepl connection completion
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*/
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static void wrepl_connect_handler(struct event_context *ev, struct fd_event *fde,
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uint16_t flags, void *private)
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{
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struct wrepl_socket *wrepl_socket = talloc_get_type(private,
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struct wrepl_socket);
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struct wrepl_request *req = wrepl_socket->recv_queue;
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talloc_free(fde);
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if (req == NULL) return;
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req->status = socket_connect_complete(wrepl_socket->sock, 0);
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if (NT_STATUS_IS_ERR(req->status)) goto failed;
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if (!NT_STATUS_IS_OK(req->status)) return;
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wrepl_socket->fde = event_add_fd(wrepl_socket->event_ctx, wrepl_socket,
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socket_get_fd(wrepl_socket->sock),
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0,
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wrepl_handler, wrepl_socket);
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if (wrepl_socket->fde == NULL) {
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req->status = NT_STATUS_NO_MEMORY;
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}
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failed:
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DLIST_REMOVE(wrepl_socket->recv_queue, req);
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if (!NT_STATUS_IS_OK(req->status)) {
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req->state = WREPL_REQUEST_ERROR;
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} else {
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req->state = WREPL_REQUEST_DONE;
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}
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if (req->async.fn) {
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req->async.fn(req);
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}
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}
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/*
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initialise a wrepl_socket. The event_ctx is optional, if provided then
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operations will use that event context
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*/
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struct wrepl_socket *wrepl_socket_init(TALLOC_CTX *mem_ctx,
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struct event_context *event_ctx)
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{
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struct wrepl_socket *wrepl_socket;
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NTSTATUS status;
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wrepl_socket = talloc(mem_ctx, struct wrepl_socket);
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if (wrepl_socket == NULL) goto failed;
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if (event_ctx == NULL) {
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wrepl_socket->event_ctx = event_context_init(wrepl_socket);
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} else {
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wrepl_socket->event_ctx = talloc_reference(wrepl_socket, event_ctx);
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}
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if (wrepl_socket->event_ctx == NULL) goto failed;
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status = socket_create("ip", SOCKET_TYPE_STREAM, &wrepl_socket->sock, 0);
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if (!NT_STATUS_IS_OK(status)) goto failed;
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talloc_steal(wrepl_socket, wrepl_socket->sock);
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wrepl_socket->send_queue = NULL;
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wrepl_socket->recv_queue = NULL;
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wrepl_socket->fde = event_add_fd(wrepl_socket->event_ctx, wrepl_socket,
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socket_get_fd(wrepl_socket->sock),
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EVENT_FD_WRITE,
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wrepl_connect_handler, wrepl_socket);
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set_blocking(socket_get_fd(wrepl_socket->sock), False);
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return wrepl_socket;
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failed:
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talloc_free(wrepl_socket);
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return NULL;
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}
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/*
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destroy a wrepl_request
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*/
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static int wrepl_request_destructor(void *ptr)
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{
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struct wrepl_request *req = talloc_get_type(ptr, struct wrepl_request);
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if (req->state == WREPL_REQUEST_SEND) {
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DLIST_REMOVE(req->wrepl_socket->send_queue, req);
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}
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if (req->state == WREPL_REQUEST_RECV) {
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DLIST_REMOVE(req->wrepl_socket->recv_queue, req);
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}
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req->state = WREPL_REQUEST_ERROR;
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return 0;
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}
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/*
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wait for a request to complete
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*/
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static NTSTATUS wrepl_request_wait(struct wrepl_request *req)
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{
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NT_STATUS_HAVE_NO_MEMORY(req);
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while (req->state < WREPL_REQUEST_DONE) {
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event_loop_once(req->wrepl_socket->event_ctx);
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}
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return req->status;
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}
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/*
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connect a wrepl_socket to a WINS server
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*/
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struct wrepl_request *wrepl_connect_send(struct wrepl_socket *wrepl_socket,
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const char *address)
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{
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struct wrepl_request *req;
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NTSTATUS status;
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req = talloc_zero(wrepl_socket, struct wrepl_request);
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if (req == NULL) goto failed;
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req->wrepl_socket = wrepl_socket;
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req->state = WREPL_REQUEST_RECV;
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DLIST_ADD(wrepl_socket->recv_queue, req);
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talloc_set_destructor(req, wrepl_request_destructor);
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status = socket_connect(wrepl_socket->sock, NULL, 0, address,
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WINS_REPLICATION_PORT, 0);
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if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) goto failed;
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return req;
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failed:
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talloc_free(req);
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return NULL;
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}
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/*
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connect a wrepl_socket to a WINS server - recv side
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*/
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NTSTATUS wrepl_connect_recv(struct wrepl_request *req)
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{
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return wrepl_request_wait(req);
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}
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|
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/*
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connect a wrepl_socket to a WINS server - sync API
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*/
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NTSTATUS wrepl_connect(struct wrepl_socket *wrepl_socket, const char *address)
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{
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struct wrepl_request *req = wrepl_connect_send(wrepl_socket, address);
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return wrepl_connect_recv(req);
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}
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|
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/*
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send a generic wins replication request
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*/
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struct wrepl_request *wrepl_request_send(struct wrepl_socket *wrepl_socket,
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struct wrepl_packet *packet)
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{
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struct wrepl_request *req;
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struct wrepl_wrap wrap;
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|
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req = talloc_zero(wrepl_socket, struct wrepl_request);
|
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if (req == NULL) goto failed;
|
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|
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req->wrepl_socket = wrepl_socket;
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req->state = WREPL_REQUEST_SEND;
|
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|
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wrap.packet = *packet;
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req->status = ndr_push_struct_blob(&req->buffer, req, &wrap,
|
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(ndr_push_flags_fn_t)ndr_push_wrepl_wrap);
|
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if (!NT_STATUS_IS_OK(req->status)) goto failed;
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|
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if (DEBUGLVL(10)) {
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DEBUG(10,("Sending WINS packet of length %d\n", (int)req->buffer.length));
|
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NDR_PRINT_DEBUG(wrepl_packet, &wrap.packet);
|
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}
|
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|
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DLIST_ADD(wrepl_socket->send_queue, req);
|
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|
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talloc_set_destructor(req, wrepl_request_destructor);
|
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|
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EVENT_FD_WRITEABLE(wrepl_socket->fde);
|
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|
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return req;
|
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|
||||
failed:
|
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talloc_free(req);
|
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return NULL;
|
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}
|
||||
|
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/*
|
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receive a generic WINS replication reply
|
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*/
|
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NTSTATUS wrepl_request_recv(struct wrepl_request *req,
|
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TALLOC_CTX *mem_ctx,
|
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struct wrepl_packet **packet)
|
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{
|
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NTSTATUS status = wrepl_request_wait(req);
|
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if (NT_STATUS_IS_OK(status)) {
|
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*packet = talloc_steal(mem_ctx, req->packet);
|
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}
|
||||
talloc_free(req);
|
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return status;
|
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}
|
||||
|
||||
/*
|
||||
a full WINS replication request/response
|
||||
*/
|
||||
NTSTATUS wrepl_request(struct wrepl_socket *wrepl_socket,
|
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TALLOC_CTX *mem_ctx,
|
||||
struct wrepl_packet *req_packet,
|
||||
struct wrepl_packet **reply_packet)
|
||||
{
|
||||
struct wrepl_request *req = wrepl_request_send(wrepl_socket, req_packet);
|
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return wrepl_request_recv(req, mem_ctx, reply_packet);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
setup an association - send
|
||||
*/
|
||||
struct wrepl_request *wrepl_associate_send(struct wrepl_socket *wrepl_socket,
|
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struct wrepl_associate *io)
|
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{
|
||||
struct wrepl_packet *packet;
|
||||
struct wrepl_request *req;
|
||||
|
||||
packet = talloc_zero(wrepl_socket, struct wrepl_packet);
|
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if (packet == NULL) return NULL;
|
||||
|
||||
packet->opcode = WREPL_OPCODE_BITS;
|
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packet->mess_type = WREPL_START_ASSOCIATION;
|
||||
packet->message.start.minor_version = 2;
|
||||
packet->message.start.major_version = 5;
|
||||
|
||||
req = wrepl_request_send(wrepl_socket, packet);
|
||||
|
||||
talloc_free(packet);
|
||||
|
||||
return req;
|
||||
}
|
||||
|
||||
/*
|
||||
setup an association - recv
|
||||
*/
|
||||
NTSTATUS wrepl_associate_recv(struct wrepl_request *req,
|
||||
struct wrepl_associate *io)
|
||||
{
|
||||
struct wrepl_packet *packet=NULL;
|
||||
NTSTATUS status;
|
||||
status = wrepl_request_recv(req, req->wrepl_socket, &packet);
|
||||
if (packet->mess_type != WREPL_START_ASSOCIATION_REPLY) {
|
||||
status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
|
||||
}
|
||||
if (NT_STATUS_IS_OK(status)) {
|
||||
io->out.assoc_ctx = packet->message.start_reply.assoc_ctx;
|
||||
}
|
||||
talloc_free(packet);
|
||||
return status;
|
||||
}
|
||||
|
||||
/*
|
||||
setup an association - sync api
|
||||
*/
|
||||
NTSTATUS wrepl_associate(struct wrepl_socket *wrepl_socket,
|
||||
struct wrepl_associate *io)
|
||||
{
|
||||
struct wrepl_request *req = wrepl_associate_send(wrepl_socket, io);
|
||||
return wrepl_associate_recv(req, io);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
fetch the partner tables - send
|
||||
*/
|
||||
struct wrepl_request *wrepl_pull_table_send(struct wrepl_socket *wrepl_socket,
|
||||
struct wrepl_pull_table *io)
|
||||
{
|
||||
struct wrepl_packet *packet;
|
||||
struct wrepl_request *req;
|
||||
|
||||
packet = talloc_zero(wrepl_socket, struct wrepl_packet);
|
||||
if (packet == NULL) return NULL;
|
||||
|
||||
packet->opcode = WREPL_OPCODE_BITS;
|
||||
packet->assoc_ctx = io->in.assoc_ctx;
|
||||
packet->mess_type = WREPL_REPLICATION;
|
||||
packet->message.replication.command = WREPL_REPL_TABLE_QUERY;
|
||||
|
||||
req = wrepl_request_send(wrepl_socket, packet);
|
||||
|
||||
talloc_free(packet);
|
||||
|
||||
return req;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
fetch the partner tables - recv
|
||||
*/
|
||||
NTSTATUS wrepl_pull_table_recv(struct wrepl_request *req,
|
||||
TALLOC_CTX *mem_ctx,
|
||||
struct wrepl_pull_table *io)
|
||||
{
|
||||
struct wrepl_packet *packet=NULL;
|
||||
NTSTATUS status;
|
||||
struct wrepl_table *table;
|
||||
int i;
|
||||
|
||||
status = wrepl_request_recv(req, req->wrepl_socket, &packet);
|
||||
if (packet->mess_type != WREPL_REPLICATION) {
|
||||
status = NT_STATUS_NETWORK_ACCESS_DENIED;
|
||||
} else if (packet->message.replication.command != WREPL_REPL_TABLE_REPLY) {
|
||||
status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
|
||||
}
|
||||
if (!NT_STATUS_IS_OK(status)) goto failed;
|
||||
|
||||
table = &packet->message.replication.info.table;
|
||||
io->out.num_partners = table->partner_count;
|
||||
io->out.partners = talloc_steal(mem_ctx, table->partners);
|
||||
for (i=0;i<io->out.num_partners;i++) {
|
||||
talloc_steal(io->out.partners, io->out.partners[i].address);
|
||||
}
|
||||
|
||||
failed:
|
||||
talloc_free(packet);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
fetch the partner table - sync api
|
||||
*/
|
||||
NTSTATUS wrepl_pull_table(struct wrepl_socket *wrepl_socket,
|
||||
TALLOC_CTX *mem_ctx,
|
||||
struct wrepl_pull_table *io)
|
||||
{
|
||||
struct wrepl_request *req = wrepl_pull_table_send(wrepl_socket, io);
|
||||
return wrepl_pull_table_recv(req, mem_ctx, io);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
fetch the names for a WINS partner - send
|
||||
*/
|
||||
struct wrepl_request *wrepl_pull_names_send(struct wrepl_socket *wrepl_socket,
|
||||
struct wrepl_pull_names *io)
|
||||
{
|
||||
struct wrepl_packet *packet;
|
||||
struct wrepl_request *req;
|
||||
|
||||
packet = talloc_zero(wrepl_socket, struct wrepl_packet);
|
||||
if (packet == NULL) return NULL;
|
||||
|
||||
packet->opcode = WREPL_OPCODE_BITS;
|
||||
packet->assoc_ctx = io->in.assoc_ctx;
|
||||
packet->mess_type = WREPL_REPLICATION;
|
||||
packet->message.replication.command = WREPL_REPL_SEND_REQUEST;
|
||||
packet->message.replication.info.owner = io->in.partner;
|
||||
|
||||
req = wrepl_request_send(wrepl_socket, packet);
|
||||
|
||||
talloc_free(packet);
|
||||
|
||||
return req;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
extract a nbt_name from a WINS name buffer
|
||||
*/
|
||||
static NTSTATUS wrepl_extract_name(struct nbt_name *name,
|
||||
TALLOC_CTX *mem_ctx,
|
||||
uint8_t *namebuf, uint32_t len)
|
||||
{
|
||||
char *s;
|
||||
|
||||
/* oh wow, what a nasty bug in windows ... */
|
||||
if (namebuf[0] == 0x1b && len >= 16) {
|
||||
namebuf[0] = namebuf[15];
|
||||
namebuf[15] = 0x1b;
|
||||
}
|
||||
|
||||
if (len < 17) {
|
||||
make_nbt_name_client(name, talloc_strndup(mem_ctx, namebuf, len));
|
||||
return NT_STATUS_OK;
|
||||
}
|
||||
|
||||
s = talloc_strndup(mem_ctx, namebuf, 15);
|
||||
trim_string(s, NULL, " ");
|
||||
name->name = s;
|
||||
name->type = namebuf[15];
|
||||
if (len > 18) {
|
||||
name->scope = talloc_strndup(mem_ctx, namebuf+17, len-17);
|
||||
} else {
|
||||
name->scope = NULL;
|
||||
}
|
||||
|
||||
return NT_STATUS_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
fetch the names for a WINS partner - recv
|
||||
*/
|
||||
NTSTATUS wrepl_pull_names_recv(struct wrepl_request *req,
|
||||
TALLOC_CTX *mem_ctx,
|
||||
struct wrepl_pull_names *io)
|
||||
{
|
||||
struct wrepl_packet *packet=NULL;
|
||||
NTSTATUS status;
|
||||
int i;
|
||||
|
||||
status = wrepl_request_recv(req, req->wrepl_socket, &packet);
|
||||
if (packet->mess_type != WREPL_REPLICATION ||
|
||||
packet->message.replication.command != WREPL_REPL_SEND_REPLY) {
|
||||
status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
|
||||
}
|
||||
if (!NT_STATUS_IS_OK(status)) goto failed;
|
||||
|
||||
io->out.num_names = packet->message.replication.info.reply.num_names;
|
||||
|
||||
status = NT_STATUS_NO_MEMORY;
|
||||
|
||||
io->out.names = talloc_array(packet, struct wrepl_name, io->out.num_names);
|
||||
if (io->out.names == NULL) goto failed;
|
||||
|
||||
/* convert the list of names and addresses to a sane format */
|
||||
for (i=0;i<io->out.num_names;i++) {
|
||||
struct wrepl_wins_name *wname = &packet->message.replication.info.reply.names[i];
|
||||
struct wrepl_name *name = &io->out.names[i];
|
||||
status = wrepl_extract_name(&name->name, io->out.names,
|
||||
wname->name, wname->name_len);
|
||||
if (!NT_STATUS_IS_OK(status)) goto failed;
|
||||
|
||||
/* trying to save 1 or 2 bytes on the wire isn't a good idea */
|
||||
if (wname->flags & 2) {
|
||||
int j;
|
||||
|
||||
name->num_addresses = wname->addresses.addresses.num_ips;
|
||||
name->addresses = talloc_array(io->out.names,
|
||||
struct wrepl_address,
|
||||
name->num_addresses);
|
||||
if (name->addresses == NULL) goto failed;
|
||||
for (j=0;j<name->num_addresses;j++) {
|
||||
name->addresses[j].owner =
|
||||
talloc_steal(name->addresses,
|
||||
wname->addresses.addresses.ips[j].owner);
|
||||
name->addresses[j].address =
|
||||
talloc_steal(name->addresses,
|
||||
wname->addresses.addresses.ips[j].ip);
|
||||
}
|
||||
} else {
|
||||
name->num_addresses = 1;
|
||||
name->addresses = talloc(io->out.names, struct wrepl_address);
|
||||
if (name->addresses == NULL) goto failed;
|
||||
name->addresses[0].owner = talloc_steal(name->addresses,
|
||||
wname->addresses.address.owner);
|
||||
name->addresses[0].address = talloc_steal(name->addresses,
|
||||
wname->addresses.address.ip);
|
||||
}
|
||||
}
|
||||
|
||||
talloc_steal(mem_ctx, io->out.names);
|
||||
status = NT_STATUS_OK;
|
||||
|
||||
failed:
|
||||
talloc_free(packet);
|
||||
return status;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
fetch the names for a WINS partner - sync api
|
||||
*/
|
||||
NTSTATUS wrepl_pull_names(struct wrepl_socket *wrepl_socket,
|
||||
TALLOC_CTX *mem_ctx,
|
||||
struct wrepl_pull_names *io)
|
||||
{
|
||||
struct wrepl_request *req = wrepl_pull_names_send(wrepl_socket, io);
|
||||
return wrepl_pull_names_recv(req, mem_ctx, io);
|
||||
}
|
Reference in New Issue
Block a user