/* Unix SMB/CIFS implementation. Core SMB2 server Copyright (C) Stefan Metzmacher 2009 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "includes.h" #include "smbd/smbd.h" #include "smbd/globals.h" #include "../libcli/smb/smb_common.h" #include "../lib/util/tevent_ntstatus.h" #include "include/ntioctl.h" #include "smb2_ioctl_private.h" #include "librpc/gen_ndr/ioctl.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_SMB2 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct smbd_smb2_request *smb2req, struct files_struct *in_fsp, uint32_t in_ctl_code, DATA_BLOB in_input, uint32_t in_max_output, uint32_t in_flags); static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, DATA_BLOB *out_output, uint8_t *body_padding, bool *disconnect); static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq); NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req) { NTSTATUS status; const uint8_t *inbody; uint32_t min_buffer_offset; uint32_t max_buffer_offset; uint32_t min_output_offset; uint32_t allowed_length_in; uint32_t allowed_length_out; uint32_t in_ctl_code; uint64_t in_file_id_persistent; uint64_t in_file_id_volatile; struct files_struct *in_fsp = NULL; uint32_t in_input_offset; uint32_t in_input_length; DATA_BLOB in_input_buffer = data_blob_null; uint32_t in_max_input_length; uint32_t in_output_offset; uint32_t in_output_length; DATA_BLOB in_output_buffer = data_blob_null; uint32_t in_max_output_length; uint32_t in_flags; uint32_t data_length_in; uint32_t data_length_out; uint32_t data_length_tmp; uint32_t data_length_max; struct tevent_req *subreq; status = smbd_smb2_request_verify_sizes(req, 0x39); if (!NT_STATUS_IS_OK(status)) { return smbd_smb2_request_error(req, status); } inbody = SMBD_SMB2_IN_BODY_PTR(req); in_ctl_code = IVAL(inbody, 0x04); in_file_id_persistent = BVAL(inbody, 0x08); in_file_id_volatile = BVAL(inbody, 0x10); in_input_offset = IVAL(inbody, 0x18); in_input_length = IVAL(inbody, 0x1C); in_max_input_length = IVAL(inbody, 0x20); in_output_offset = IVAL(inbody, 0x24); in_output_length = IVAL(inbody, 0x28); in_max_output_length = IVAL(inbody, 0x2C); in_flags = IVAL(inbody, 0x30); min_buffer_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req); max_buffer_offset = min_buffer_offset + SMBD_SMB2_IN_DYN_LEN(req); min_output_offset = min_buffer_offset; /* * InputOffset (4 bytes): The offset, in bytes, from the beginning of * the SMB2 header to the input data buffer. If no input data is * required for the FSCTL/IOCTL command being issued, the client SHOULD * set this value to 0.<49> * <49> If no input data is required for the FSCTL/IOCTL command being * issued, Windows-based clients set this field to any value. */ allowed_length_in = 0; if ((in_input_offset > 0) && (in_input_length > 0)) { uint32_t tmp_ofs; if (in_input_offset < min_buffer_offset) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } if (in_input_offset > max_buffer_offset) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } allowed_length_in = max_buffer_offset - in_input_offset; tmp_ofs = in_input_offset - min_buffer_offset; in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req); in_input_buffer.data += tmp_ofs; in_input_buffer.length = in_input_length; min_output_offset += tmp_ofs; min_output_offset += in_input_length; } if (in_input_length > allowed_length_in) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } allowed_length_out = 0; if (in_output_offset > 0) { if (in_output_offset < min_buffer_offset) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } if (in_output_offset > max_buffer_offset) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } allowed_length_out = max_buffer_offset - in_output_offset; } if (in_output_length > allowed_length_out) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } if (in_output_length > 0) { uint32_t tmp_ofs; if (in_output_offset < min_output_offset) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } tmp_ofs = in_output_offset - min_buffer_offset; in_output_buffer.data = SMBD_SMB2_IN_DYN_PTR(req); in_output_buffer.data += tmp_ofs; in_output_buffer.length = in_output_length; } /* * verify the credits and avoid overflows * in_input_buffer.length and in_output_buffer.length * are already verified. */ data_length_in = in_input_buffer.length + in_output_buffer.length; data_length_out = in_max_input_length; data_length_tmp = UINT32_MAX - data_length_out; if (data_length_tmp < in_max_output_length) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } data_length_out += in_max_output_length; data_length_max = MAX(data_length_in, data_length_out); status = smbd_smb2_request_verify_creditcharge(req, data_length_max); if (!NT_STATUS_IS_OK(status)) { return smbd_smb2_request_error(req, status); } /* * If the Flags field of the request is not SMB2_0_IOCTL_IS_FSCTL the * server MUST fail the request with STATUS_NOT_SUPPORTED. */ if (in_flags != SMB2_IOCTL_FLAG_IS_FSCTL) { return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED); } switch (in_ctl_code) { case FSCTL_DFS_GET_REFERRALS: case FSCTL_DFS_GET_REFERRALS_EX: case FSCTL_PIPE_WAIT: case FSCTL_VALIDATE_NEGOTIATE_INFO_224: case FSCTL_VALIDATE_NEGOTIATE_INFO: case FSCTL_QUERY_NETWORK_INTERFACE_INFO: case FSCTL_SMBTORTURE_FORCE_UNACKED_TIMEOUT: case FSCTL_SMBTORTURE_IOCTL_RESPONSE_BODY_PADDING8: case FSCTL_SMBTORTURE_GLOBAL_READ_RESPONSE_BODY_PADDING8: /* * Some SMB2 specific CtlCodes like FSCTL_DFS_GET_REFERRALS or * FSCTL_PIPE_WAIT does not take a file handle. * * If FileId in the SMB2 Header of the request is not * 0xFFFFFFFFFFFFFFFF, then the server MUST fail the request * with STATUS_INVALID_PARAMETER. */ if (in_file_id_persistent != UINT64_MAX || in_file_id_volatile != UINT64_MAX) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } break; default: in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile); if (in_fsp == NULL) { return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED); } break; } subreq = smbd_smb2_ioctl_send(req, req->sconn->ev_ctx, req, in_fsp, in_ctl_code, in_input_buffer, in_max_output_length, in_flags); if (subreq == NULL) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } /* * If the FSCTL has gone async on a file handle, remember * to add it to the list of async requests we need to wait * for on file handle close. */ if (in_fsp != NULL && tevent_req_is_in_progress(subreq)) { bool ok; ok = aio_add_req_to_fsp(in_fsp, subreq); if (!ok) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } } tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req); return smbd_smb2_request_pending_queue(req, subreq, 1000); } /* * 3.3.4.4 Sending an Error Response * An error code other than one of the following indicates a failure: */ static bool smbd_smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status, size_t data_size) { if (NT_STATUS_IS_OK(status)) { return false; } /* * STATUS_BUFFER_OVERFLOW in a FSCTL_PIPE_TRANSCEIVE, FSCTL_PIPE_PEEK or * FSCTL_DFS_GET_REFERRALS Response specified in section 2.2.32.<153> */ if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW) && ((ctl_code == FSCTL_PIPE_TRANSCEIVE) || (ctl_code == FSCTL_PIPE_PEEK) || (ctl_code == FSCTL_DFS_GET_REFERRALS))) { return false; } /* * Any status other than STATUS_SUCCESS in a FSCTL_SRV_COPYCHUNK or * FSCTL_SRV_COPYCHUNK_WRITE Response, when returning an * SRV_COPYCHUNK_RESPONSE as described in section 2.2.32.1. */ if (((ctl_code == FSCTL_SRV_COPYCHUNK) || (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE)) && (data_size == sizeof(struct srv_copychunk_rsp))) { return false; } return true; } static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq) { struct smbd_smb2_request *req = tevent_req_callback_data(subreq, struct smbd_smb2_request); const uint8_t *inbody; DATA_BLOB outbody; DATA_BLOB outdyn; uint32_t in_ctl_code; uint64_t in_file_id_persistent; uint64_t in_file_id_volatile; uint32_t in_max_output_length; uint32_t out_input_offset; uint32_t out_output_offset; DATA_BLOB out_output_buffer = data_blob_null; NTSTATUS status; NTSTATUS error; /* transport error */ bool disconnect = false; uint16_t body_size; uint8_t body_padding = 0; status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer, &body_padding, &disconnect); DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned " "%u status %s\n", (unsigned int)out_output_buffer.length, nt_errstr(status) )); TALLOC_FREE(subreq); if (disconnect) { error = status; smbd_server_connection_terminate(req->xconn, nt_errstr(error)); return; } inbody = SMBD_SMB2_IN_BODY_PTR(req); in_ctl_code = IVAL(inbody, 0x04); in_file_id_persistent = BVAL(inbody, 0x08); in_file_id_volatile = BVAL(inbody, 0x10); in_max_output_length = IVAL(inbody, 0x2C); if (out_output_buffer.length > in_max_output_length) { /* * Return NT_STATUS_BUFFER_TOO_SMALL by * default if the provided buffer doesn't * fit. * * If someone wants truncated data * together with STATUS_BUFFER_OVERFLOW * it needs to be done explicitly in * the backends. We currently do that * in: * - fsctl_dfs_get_refers() * - smbd_smb2_ioctl_pipe_read_done() */ status = NT_STATUS_BUFFER_TOO_SMALL; } if (smbd_smb2_ioctl_is_failure(in_ctl_code, status, out_output_buffer.length)) { error = smbd_smb2_request_error(req, status); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(req->xconn, nt_errstr(error)); return; } return; } /* * Only FSCTL_SMBTORTURE_IOCTL_RESPONSE_BODY_PADDING8 * sets body_padding to a value different from 0. */ body_size = 0x30 + body_padding; out_input_offset = SMB2_HDR_BODY + body_size; out_output_offset = SMB2_HDR_BODY + body_size; outbody = smbd_smb2_generate_outbody(req, body_size); if (outbody.data == NULL) { error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(req->xconn, nt_errstr(error)); return; } return; } SSVAL(outbody.data, 0x00, 0x30 + 1); /* struct size */ SSVAL(outbody.data, 0x02, 0); /* reserved */ SIVAL(outbody.data, 0x04, in_ctl_code); /* ctl code */ SBVAL(outbody.data, 0x08, in_file_id_persistent); /* file id (persistent) */ SBVAL(outbody.data, 0x10, in_file_id_volatile); /* file id (volatile) */ SIVAL(outbody.data, 0x18, out_input_offset); /* input offset */ SIVAL(outbody.data, 0x1C, 0); /* input count */ SIVAL(outbody.data, 0x20, out_output_offset); /* output offset */ SIVAL(outbody.data, 0x24, out_output_buffer.length); /* output count */ SIVAL(outbody.data, 0x28, 0); /* flags */ SIVAL(outbody.data, 0x2C, 0); /* reserved */ if (body_padding != 0) { memset(outbody.data + 0x30, 0, body_padding); } /* * Note: Windows Vista and 2008 send back also the * input from the request. But it was fixed in * Windows 7. */ outdyn = out_output_buffer; error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn, __location__); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(req->xconn, nt_errstr(error)); return; } } static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct smbd_smb2_request *smb2req, struct files_struct *fsp, uint32_t in_ctl_code, DATA_BLOB in_input, uint32_t in_max_output, uint32_t in_flags) { struct tevent_req *req; struct smbd_smb2_ioctl_state *state; struct smb_request *smbreq; req = tevent_req_create(mem_ctx, &state, struct smbd_smb2_ioctl_state); if (req == NULL) { return NULL; } state->smb2req = smb2req; state->smbreq = NULL; state->fsp = fsp; state->in_input = in_input; state->in_max_output = in_max_output; state->out_output = data_blob_null; DEBUG(10, ("smbd_smb2_ioctl: ctl_code[0x%08x] %s, %s\n", (unsigned)in_ctl_code, fsp ? fsp_str_dbg(fsp) : "", fsp_fnum_dbg(fsp))); smbreq = smbd_smb2_fake_smb_request(smb2req); if (tevent_req_nomem(smbreq, req)) { return tevent_req_post(req, ev); } state->smbreq = smbreq; switch (in_ctl_code & IOCTL_DEV_TYPE_MASK) { case FSCTL_DFS: return smb2_ioctl_dfs(in_ctl_code, ev, req, state); break; case FSCTL_FILESYSTEM: return smb2_ioctl_filesys(in_ctl_code, ev, req, state); break; case FSCTL_NAMED_PIPE: return smb2_ioctl_named_pipe(in_ctl_code, ev, req, state); break; case FSCTL_NETWORK_FILESYSTEM: return smb2_ioctl_network_fs(in_ctl_code, ev, req, state); break; case FSCTL_SMBTORTURE: return smb2_ioctl_smbtorture(in_ctl_code, ev, req, state); break; default: if (IS_IPC(smbreq->conn)) { tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED); } else { tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST); } return tevent_req_post(req, ev); break; } tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR); return tevent_req_post(req, ev); } static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, DATA_BLOB *out_output, uint8_t *body_padding, bool *disconnect) { NTSTATUS status = NT_STATUS_OK; struct smbd_smb2_ioctl_state *state = tevent_req_data(req, struct smbd_smb2_ioctl_state); enum tevent_req_state req_state; uint64_t err; *body_padding = state->body_padding; *disconnect = state->disconnect; if ((tevent_req_is_error(req, &req_state, &err) == false) || (req_state == TEVENT_REQ_USER_ERROR)) { /* * Return output buffer to caller if the ioctl was successfully * processed, even if a user error occurred. Some ioctls return * data on failure. */ *out_output = state->out_output; talloc_steal(mem_ctx, out_output->data); } tevent_req_is_nterror(req, &status); tevent_req_received(req); return status; }