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} 169