1/* 2 Unix SMB/CIFS implementation. 3 Core SMB2 server 4 5 Copyright (C) Stefan Metzmacher 2009 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. 19*/ 20 21#include "includes.h" 22#include "smbd/globals.h" 23#include "../libcli/smb/smb_common.h" 24 25static struct tevent_req *smbd_smb2_write_send(TALLOC_CTX *mem_ctx, 26 struct tevent_context *ev, 27 struct smbd_smb2_request *smb2req, 28 uint32_t in_smbpid, 29 uint64_t in_file_id_volatile, 30 DATA_BLOB in_data, 31 uint64_t in_offset, 32 uint32_t in_flags); 33static NTSTATUS smbd_smb2_write_recv(struct tevent_req *req, 34 uint32_t *out_count); 35 36static void smbd_smb2_request_write_done(struct tevent_req *subreq); 37NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req) 38{ 39 const uint8_t *inhdr; 40 const uint8_t *inbody; 41 int i = req->current_idx; 42 size_t expected_body_size = 0x31; 43 size_t body_size; 44 uint32_t in_smbpid; 45 uint16_t in_data_offset; 46 uint32_t in_data_length; 47 DATA_BLOB in_data_buffer; 48 uint64_t in_offset; 49 uint64_t in_file_id_persistent; 50 uint64_t in_file_id_volatile; 51 uint32_t in_flags; 52 struct tevent_req *subreq; 53 54 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base; 55 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) { 56 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); 57 } 58 59 inbody = (const uint8_t *)req->in.vector[i+1].iov_base; 60 61 body_size = SVAL(inbody, 0x00); 62 if (body_size != expected_body_size) { 63 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); 64 } 65 66 in_smbpid = IVAL(inhdr, SMB2_HDR_PID); 67 68 in_data_offset = SVAL(inbody, 0x02); 69 in_data_length = IVAL(inbody, 0x04); 70 in_offset = BVAL(inbody, 0x08); 71 in_file_id_persistent = BVAL(inbody, 0x10); 72 in_file_id_volatile = BVAL(inbody, 0x18); 73 in_flags = IVAL(inbody, 0x2C); 74 75 if (in_data_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) { 76 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); 77 } 78 79 if (in_data_length > req->in.vector[i+2].iov_len) { 80 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); 81 } 82 83 /* check the max write size */ 84 if (in_data_length > 0x00010000) { 85 DEBUG(0,("here:%s: 0x%08X: 0x%08X\n", 86 __location__, in_data_length, 0x00010000)); 87 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); 88 } 89 90 in_data_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base; 91 in_data_buffer.length = in_data_length; 92 93 if (req->compat_chain_fsp) { 94 /* skip check */ 95 } else if (in_file_id_persistent != 0) { 96 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED); 97 } 98 99 subreq = smbd_smb2_write_send(req, 100 req->sconn->smb2.event_ctx, 101 req, 102 in_smbpid, 103 in_file_id_volatile, 104 in_data_buffer, 105 in_offset, 106 in_flags); 107 if (subreq == NULL) { 108 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); 109 } 110 tevent_req_set_callback(subreq, smbd_smb2_request_write_done, req); 111 112 return smbd_smb2_request_pending_queue(req, subreq); 113} 114 115static void smbd_smb2_request_write_done(struct tevent_req *subreq) 116{ 117 struct smbd_smb2_request *req = tevent_req_callback_data(subreq, 118 struct smbd_smb2_request); 119 int i = req->current_idx; 120 uint8_t *outhdr; 121 DATA_BLOB outbody; 122 DATA_BLOB outdyn; 123 uint32_t out_count = 0; 124 NTSTATUS status; 125 NTSTATUS error; /* transport error */ 126 127 status = smbd_smb2_write_recv(subreq, &out_count); 128 TALLOC_FREE(subreq); 129 if (!NT_STATUS_IS_OK(status)) { 130 error = smbd_smb2_request_error(req, status); 131 if (!NT_STATUS_IS_OK(error)) { 132 smbd_server_connection_terminate(req->sconn, 133 nt_errstr(error)); 134 return; 135 } 136 return; 137 } 138 139 outhdr = (uint8_t *)req->out.vector[i].iov_base; 140 141 outbody = data_blob_talloc(req->out.vector, NULL, 0x10); 142 if (outbody.data == NULL) { 143 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); 144 if (!NT_STATUS_IS_OK(error)) { 145 smbd_server_connection_terminate(req->sconn, 146 nt_errstr(error)); 147 return; 148 } 149 return; 150 } 151 152 SSVAL(outbody.data, 0x00, 0x10 + 1); /* struct size */ 153 SSVAL(outbody.data, 0x02, 0); /* reserved */ 154 SIVAL(outbody.data, 0x04, out_count); /* count */ 155 SIVAL(outbody.data, 0x08, 0); /* remaining */ 156 SSVAL(outbody.data, 0x0C, 0); /* write channel info offset */ 157 SSVAL(outbody.data, 0x0E, 0); /* write channel info length */ 158 159 outdyn = data_blob_const(NULL, 0); 160 161 error = smbd_smb2_request_done(req, outbody, &outdyn); 162 if (!NT_STATUS_IS_OK(error)) { 163 smbd_server_connection_terminate(req->sconn, nt_errstr(error)); 164 return; 165 } 166} 167 168struct smbd_smb2_write_state { 169 struct smbd_smb2_request *smb2req; 170 uint32_t in_length; 171 uint32_t out_count; 172}; 173 174static void smbd_smb2_write_pipe_done(struct tevent_req *subreq); 175 176static struct tevent_req *smbd_smb2_write_send(TALLOC_CTX *mem_ctx, 177 struct tevent_context *ev, 178 struct smbd_smb2_request *smb2req, 179 uint32_t in_smbpid, 180 uint64_t in_file_id_volatile, 181 DATA_BLOB in_data, 182 uint64_t in_offset, 183 uint32_t in_flags) 184{ 185 NTSTATUS status; 186 struct tevent_req *req; 187 struct smbd_smb2_write_state *state; 188 struct smb_request *smbreq; 189 connection_struct *conn = smb2req->tcon->compat_conn; 190 files_struct *fsp; 191 ssize_t nwritten; 192 bool write_through = false; 193 struct lock_struct lock; 194 195 req = tevent_req_create(mem_ctx, &state, 196 struct smbd_smb2_write_state); 197 if (req == NULL) { 198 return NULL; 199 } 200 state->smb2req = smb2req; 201 state->in_length = in_data.length; 202 state->out_count = 0; 203 204 DEBUG(10,("smbd_smb2_write: file_id[0x%016llX]\n", 205 (unsigned long long)in_file_id_volatile)); 206 207 smbreq = smbd_smb2_fake_smb_request(smb2req); 208 if (tevent_req_nomem(smbreq, req)) { 209 return tevent_req_post(req, ev); 210 } 211 212 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile); 213 if (fsp == NULL) { 214 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); 215 return tevent_req_post(req, ev); 216 } 217 if (conn != fsp->conn) { 218 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); 219 return tevent_req_post(req, ev); 220 } 221 if (smb2req->session->vuid != fsp->vuid) { 222 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); 223 return tevent_req_post(req, ev); 224 } 225 226 if (IS_IPC(smbreq->conn)) { 227 struct tevent_req *subreq; 228 229 if (!fsp_is_np(fsp)) { 230 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); 231 return tevent_req_post(req, ev); 232 } 233 234 subreq = np_write_send(state, smbd_event_context(), 235 fsp->fake_file_handle, 236 in_data.data, 237 in_data.length); 238 if (tevent_req_nomem(subreq, req)) { 239 return tevent_req_post(req, ev); 240 } 241 tevent_req_set_callback(subreq, 242 smbd_smb2_write_pipe_done, 243 req); 244 return req; 245 } 246 247 if (!CHECK_WRITE(fsp)) { 248 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED); 249 return tevent_req_post(req, ev); 250 } 251 252 init_strict_lock_struct(fsp, 253 in_smbpid, 254 in_offset, 255 in_data.length, 256 WRITE_LOCK, 257 &lock); 258 259 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &lock)) { 260 tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT); 261 return tevent_req_post(req, ev); 262 } 263 264 nwritten = write_file(smbreq, fsp, 265 (const char *)in_data.data, 266 in_offset, 267 in_data.length); 268 269 if (((nwritten == 0) && (in_data.length != 0)) || (nwritten < 0)) { 270 DEBUG(5,("smbd_smb2_write: write_file[%s] disk full\n", 271 fsp_str_dbg(fsp))); 272 SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock); 273 tevent_req_nterror(req, NT_STATUS_DISK_FULL); 274 return tevent_req_post(req, ev); 275 } 276 277 DEBUG(3,("smbd_smb2_write: fnum=[%d/%s] length=%d offset=%d wrote=%d\n", 278 fsp->fnum, fsp_str_dbg(fsp), (int)in_data.length, 279 (int)in_offset, (int)nwritten)); 280 281 if (in_flags & 0x00000001) { 282 write_through = true; 283 } 284 285 status = sync_file(conn, fsp, write_through); 286 if (!NT_STATUS_IS_OK(status)) { 287 DEBUG(5,("smbd_smb2_write: sync_file for %s returned %s\n", 288 fsp_str_dbg(fsp), nt_errstr(status))); 289 SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock); 290 tevent_req_nterror(req, status); 291 return tevent_req_post(req, ev); 292 } 293 294 SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock); 295 296 state->out_count = nwritten; 297 298 tevent_req_done(req); 299 return tevent_req_post(req, ev); 300} 301 302static void smbd_smb2_write_pipe_done(struct tevent_req *subreq) 303{ 304 struct tevent_req *req = tevent_req_callback_data(subreq, 305 struct tevent_req); 306 struct smbd_smb2_write_state *state = tevent_req_data(req, 307 struct smbd_smb2_write_state); 308 NTSTATUS status; 309 ssize_t nwritten = -1; 310 311 status = np_write_recv(subreq, &nwritten); 312 TALLOC_FREE(subreq); 313 if (!NT_STATUS_IS_OK(status)) { 314 tevent_req_nterror(req, status); 315 return; 316 } 317 318 if ((nwritten == 0 && state->in_length != 0) || (nwritten < 0)) { 319 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED); 320 return; 321 } 322 323 state->out_count = nwritten; 324 325 tevent_req_done(req); 326} 327 328static NTSTATUS smbd_smb2_write_recv(struct tevent_req *req, 329 uint32_t *out_count) 330{ 331 NTSTATUS status; 332 struct smbd_smb2_write_state *state = tevent_req_data(req, 333 struct smbd_smb2_write_state); 334 335 if (tevent_req_is_nterror(req, &status)) { 336 tevent_req_received(req); 337 return status; 338 } 339 340 *out_count = state->out_count; 341 342 tevent_req_received(req); 343 return NT_STATUS_OK; 344} 345