source: branches/samba-3.5.x/source4/libcli/raw/rawnotify.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 5.3 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 client change notify operations
4 Copyright (C) Andrew Tridgell 2003
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include "includes.h"
21#include "libcli/raw/libcliraw.h"
22#include "libcli/raw/raw_proto.h"
23#include "../lib/util/dlinklist.h"
24
25/****************************************************************************
26change notify (async send)
27****************************************************************************/
28_PUBLIC_ struct smbcli_request *smb_raw_changenotify_send(struct smbcli_tree *tree, union smb_notify *parms)
29{
30 struct smb_nttrans nt;
31 uint8_t setup[8];
32
33 if (parms->nttrans.level != RAW_NOTIFY_NTTRANS) {
34 return NULL;
35 }
36
37 nt.in.max_setup = 0;
38 nt.in.max_param = parms->nttrans.in.buffer_size;
39 nt.in.max_data = 0;
40 nt.in.setup_count = 4;
41 nt.in.setup = setup;
42 SIVAL(setup, 0, parms->nttrans.in.completion_filter);
43 SSVAL(setup, 4, parms->nttrans.in.file.fnum);
44 SSVAL(setup, 6, parms->nttrans.in.recursive);
45 nt.in.function = NT_TRANSACT_NOTIFY_CHANGE;
46 nt.in.params = data_blob(NULL, 0);
47 nt.in.data = data_blob(NULL, 0);
48
49 return smb_raw_nttrans_send(tree, &nt);
50}
51
52/****************************************************************************
53change notify (async recv)
54****************************************************************************/
55_PUBLIC_ NTSTATUS smb_raw_changenotify_recv(struct smbcli_request *req,
56 TALLOC_CTX *mem_ctx, union smb_notify *parms)
57{
58 struct smb_nttrans nt;
59 NTSTATUS status;
60 uint32_t ofs, i;
61 struct smbcli_session *session = req?req->session:NULL;
62
63 if (parms->nttrans.level != RAW_NOTIFY_NTTRANS) {
64 return NT_STATUS_INVALID_LEVEL;
65 }
66
67 status = smb_raw_nttrans_recv(req, mem_ctx, &nt);
68 if (!NT_STATUS_IS_OK(status)) {
69 return status;
70 }
71
72 parms->nttrans.out.changes = NULL;
73 parms->nttrans.out.num_changes = 0;
74
75 /* count them */
76 for (ofs=0; nt.out.params.length - ofs > 12; ) {
77 uint32_t next = IVAL(nt.out.params.data, ofs);
78 parms->nttrans.out.num_changes++;
79 if (next == 0 ||
80 ofs + next >= nt.out.params.length) break;
81 ofs += next;
82 }
83
84 /* allocate array */
85 parms->nttrans.out.changes = talloc_array(mem_ctx, struct notify_changes, parms->nttrans.out.num_changes);
86 if (!parms->nttrans.out.changes) {
87 return NT_STATUS_NO_MEMORY;
88 }
89
90 for (i=ofs=0; i<parms->nttrans.out.num_changes; i++) {
91 parms->nttrans.out.changes[i].action = IVAL(nt.out.params.data, ofs+4);
92 smbcli_blob_pull_string(session, mem_ctx, &nt.out.params,
93 &parms->nttrans.out.changes[i].name,
94 ofs+8, ofs+12, STR_UNICODE);
95 ofs += IVAL(nt.out.params.data, ofs);
96 }
97
98 return NT_STATUS_OK;
99}
100
101/****************************************************************************
102 handle ntcancel replies from the server,
103 as the MID of the real reply and the ntcancel reply is the same
104 we need to do find out to what request the reply belongs
105****************************************************************************/
106struct smbcli_request *smbcli_handle_ntcancel_reply(struct smbcli_request *req,
107 size_t len, const uint8_t *hdr)
108{
109 struct smbcli_request *ntcancel;
110
111 if (!req) return req;
112
113 if (!req->ntcancel) return req;
114
115 if (len >= MIN_SMB_SIZE + NBT_HDR_SIZE &&
116 (CVAL(hdr, HDR_FLG) & FLAG_REPLY) &&
117 CVAL(hdr,HDR_COM) == SMBntcancel) {
118 ntcancel = req->ntcancel;
119 DLIST_REMOVE(req->ntcancel, ntcancel);
120
121 /*
122 * TODO: untill we understand how the
123 * smb_signing works for this case we
124 * return NULL, to just ignore the packet
125 */
126 /*return ntcancel;*/
127 return NULL;
128 }
129
130 return req;
131}
132
133/****************************************************************************
134 Send a NT Cancel request - used to hurry along a pending request. Usually
135 used to cancel a pending change notify request
136 note that this request does not expect a response!
137****************************************************************************/
138NTSTATUS smb_raw_ntcancel(struct smbcli_request *oldreq)
139{
140 struct smbcli_request *req;
141
142 req = smbcli_request_setup_transport(oldreq->transport, SMBntcancel, 0, 0);
143
144 SSVAL(req->out.hdr, HDR_MID, SVAL(oldreq->out.hdr, HDR_MID));
145 SSVAL(req->out.hdr, HDR_PID, SVAL(oldreq->out.hdr, HDR_PID));
146 SSVAL(req->out.hdr, HDR_TID, SVAL(oldreq->out.hdr, HDR_TID));
147 SSVAL(req->out.hdr, HDR_UID, SVAL(oldreq->out.hdr, HDR_UID));
148
149 /* this request does not expect a reply, so tell the signing
150 subsystem not to allocate an id for a reply */
151 req->sign_single_increment = 1;
152 req->one_way_request = 1;
153
154 /*
155 * smbcli_request_send() free's oneway requests
156 * but we want to keep it under oldreq->ntcancel
157 */
158 if (!talloc_reference(oldreq, req)) {
159 talloc_free(req);
160 return NT_STATUS_NO_MEMORY;
161 }
162
163 smbcli_request_send(req);
164
165 DLIST_ADD_END(oldreq->ntcancel, req, struct smbcli_request *);
166
167 return NT_STATUS_OK;
168}
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