/* Unix SMB/CIFS implementation. Core SMB2 server Copyright (C) Stefan Metzmacher 2009 Copyright (C) Jeremy Allison 2010 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 "printing.h" #include "smbd/smbd.h" #include "smbd/globals.h" #include "../libcli/smb/smb_common.h" #include "../librpc/gen_ndr/ndr_security.h" #include "../lib/util/tevent_ntstatus.h" #include "messages.h" int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level) { switch(in_oplock_level) { case SMB2_OPLOCK_LEVEL_NONE: return NO_OPLOCK; case SMB2_OPLOCK_LEVEL_II: return LEVEL_II_OPLOCK; case SMB2_OPLOCK_LEVEL_EXCLUSIVE: return EXCLUSIVE_OPLOCK; case SMB2_OPLOCK_LEVEL_BATCH: return BATCH_OPLOCK; case SMB2_OPLOCK_LEVEL_LEASE: DEBUG(2,("map_smb2_oplock_levels_to_samba: " "LEASE_OPLOCK_REQUESTED\n")); return NO_OPLOCK; default: DEBUG(2,("map_smb2_oplock_levels_to_samba: " "unknown level %u\n", (unsigned int)in_oplock_level)); return NO_OPLOCK; } } static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type) { if (BATCH_OPLOCK_TYPE(oplock_type)) { return SMB2_OPLOCK_LEVEL_BATCH; } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) { return SMB2_OPLOCK_LEVEL_EXCLUSIVE; } else if (oplock_type == LEVEL_II_OPLOCK) { return SMB2_OPLOCK_LEVEL_II; } else { return SMB2_OPLOCK_LEVEL_NONE; } } static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct smbd_smb2_request *smb2req, uint8_t in_oplock_level, uint32_t in_impersonation_level, uint32_t in_desired_access, uint32_t in_file_attributes, uint32_t in_share_access, uint32_t in_create_disposition, uint32_t in_create_options, const char *in_name, struct smb2_create_blobs in_context_blobs); static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, uint8_t *out_oplock_level, uint32_t *out_create_action, NTTIME *out_creation_time, NTTIME *out_last_access_time, NTTIME *out_last_write_time, NTTIME *out_change_time, uint64_t *out_allocation_size, uint64_t *out_end_of_file, uint32_t *out_file_attributes, uint64_t *out_file_id_persistent, uint64_t *out_file_id_volatile, struct smb2_create_blobs *out_context_blobs); static void smbd_smb2_request_create_done(struct tevent_req *tsubreq); NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req) { const uint8_t *inbody; const struct iovec *indyniov; uint8_t in_oplock_level; uint32_t in_impersonation_level; uint32_t in_desired_access; uint32_t in_file_attributes; uint32_t in_share_access; uint32_t in_create_disposition; uint32_t in_create_options; uint16_t in_name_offset; uint16_t in_name_length; DATA_BLOB in_name_buffer; char *in_name_string; size_t in_name_string_size; uint32_t name_offset = 0; uint32_t name_available_length = 0; uint32_t in_context_offset; uint32_t in_context_length; DATA_BLOB in_context_buffer; struct smb2_create_blobs in_context_blobs; uint32_t context_offset = 0; uint32_t context_available_length = 0; uint32_t dyn_offset; NTSTATUS status; bool ok; struct tevent_req *tsubreq; status = smbd_smb2_request_verify_sizes(smb2req, 0x39); if (!NT_STATUS_IS_OK(status)) { return smbd_smb2_request_error(smb2req, status); } inbody = SMBD_SMB2_IN_BODY_PTR(smb2req); in_oplock_level = CVAL(inbody, 0x03); in_impersonation_level = IVAL(inbody, 0x04); in_desired_access = IVAL(inbody, 0x18); in_file_attributes = IVAL(inbody, 0x1C); in_share_access = IVAL(inbody, 0x20); in_create_disposition = IVAL(inbody, 0x24); in_create_options = IVAL(inbody, 0x28); in_name_offset = SVAL(inbody, 0x2C); in_name_length = SVAL(inbody, 0x2E); in_context_offset = IVAL(inbody, 0x30); in_context_length = IVAL(inbody, 0x34); /* * First check if the dynamic name and context buffers * are correctly specified. * * Note: That we don't check if the name and context buffers * overlap */ dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req); if (in_name_offset == 0 && in_name_length == 0) { /* This is ok */ name_offset = 0; } else if (in_name_offset < dyn_offset) { return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER); } else { name_offset = in_name_offset - dyn_offset; } indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req); if (name_offset > indyniov->iov_len) { return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER); } name_available_length = indyniov->iov_len - name_offset; if (in_name_length > name_available_length) { return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER); } in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset; in_name_buffer.length = in_name_length; if (in_context_offset == 0 && in_context_length == 0) { /* This is ok */ context_offset = 0; } else if (in_context_offset < dyn_offset) { return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER); } else { context_offset = in_context_offset - dyn_offset; } if (context_offset > indyniov->iov_len) { return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER); } context_available_length = indyniov->iov_len - context_offset; if (in_context_length > context_available_length) { return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER); } in_context_buffer.data = (uint8_t *)indyniov->iov_base + context_offset; in_context_buffer.length = in_context_length; /* * Now interpret the name and context buffers */ ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX, in_name_buffer.data, in_name_buffer.length, &in_name_string, &in_name_string_size); if (!ok) { return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER); } if (in_name_buffer.length == 0) { in_name_string_size = 0; } if (strlen(in_name_string) != in_name_string_size) { return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID); } ZERO_STRUCT(in_context_blobs); status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs); if (!NT_STATUS_IS_OK(status)) { return smbd_smb2_request_error(smb2req, status); } tsubreq = smbd_smb2_create_send(smb2req, smb2req->sconn->ev_ctx, smb2req, in_oplock_level, in_impersonation_level, in_desired_access, in_file_attributes, in_share_access, in_create_disposition, in_create_options, in_name_string, in_context_blobs); if (tsubreq == NULL) { smb2req->subreq = NULL; return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY); } tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req); /* * For now we keep the logic that we do not send STATUS_PENDING * for sharing violations, so we just wait 2 seconds. * * TODO: we need more tests for this. */ return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000); } static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req) { uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req); return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID); } static void smbd_smb2_request_create_done(struct tevent_req *tsubreq) { struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq, struct smbd_smb2_request); DATA_BLOB outbody; DATA_BLOB outdyn; uint8_t out_oplock_level = 0; uint32_t out_create_action = 0; NTTIME out_creation_time = 0; NTTIME out_last_access_time = 0; NTTIME out_last_write_time = 0; NTTIME out_change_time = 0; uint64_t out_allocation_size = 0; uint64_t out_end_of_file = 0; uint32_t out_file_attributes = 0; uint64_t out_file_id_persistent = 0; uint64_t out_file_id_volatile = 0; struct smb2_create_blobs out_context_blobs; DATA_BLOB out_context_buffer; uint16_t out_context_buffer_offset = 0; NTSTATUS status; NTSTATUS error; /* transport error */ status = smbd_smb2_create_recv(tsubreq, smb2req, &out_oplock_level, &out_create_action, &out_creation_time, &out_last_access_time, &out_last_write_time, &out_change_time, &out_allocation_size, &out_end_of_file, &out_file_attributes, &out_file_id_persistent, &out_file_id_volatile, &out_context_blobs); if (!NT_STATUS_IS_OK(status)) { error = smbd_smb2_request_error(smb2req, status); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(smb2req->sconn, nt_errstr(error)); return; } return; } status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs); if (!NT_STATUS_IS_OK(status)) { error = smbd_smb2_request_error(smb2req, status); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(smb2req->sconn, nt_errstr(error)); return; } return; } if (out_context_buffer.length > 0) { out_context_buffer_offset = SMB2_HDR_BODY + 0x58; } outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58); if (outbody.data == NULL) { error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(smb2req->sconn, nt_errstr(error)); return; } return; } SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */ SCVAL(outbody.data, 0x02, out_oplock_level); /* oplock level */ SCVAL(outbody.data, 0x03, 0); /* reserved */ SIVAL(outbody.data, 0x04, out_create_action); /* create action */ SBVAL(outbody.data, 0x08, out_creation_time); /* creation time */ SBVAL(outbody.data, 0x10, out_last_access_time); /* last access time */ SBVAL(outbody.data, 0x18, out_last_write_time); /* last write time */ SBVAL(outbody.data, 0x20, out_change_time); /* change time */ SBVAL(outbody.data, 0x28, out_allocation_size); /* allocation size */ SBVAL(outbody.data, 0x30, out_end_of_file); /* end of file */ SIVAL(outbody.data, 0x38, out_file_attributes); /* file attributes */ SIVAL(outbody.data, 0x3C, 0); /* reserved */ SBVAL(outbody.data, 0x40, out_file_id_persistent); /* file id (persistent) */ SBVAL(outbody.data, 0x48, out_file_id_volatile); /* file id (volatile) */ SIVAL(outbody.data, 0x50, out_context_buffer_offset); /* create contexts offset */ SIVAL(outbody.data, 0x54, out_context_buffer.length); /* create contexts length */ outdyn = out_context_buffer; error = smbd_smb2_request_done(smb2req, outbody, &outdyn); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(smb2req->sconn, nt_errstr(error)); return; } } struct smbd_smb2_create_state { struct smbd_smb2_request *smb2req; struct smb_request *smb1req; bool open_was_deferred; struct tevent_timer *te; struct tevent_immediate *im; struct timeval request_time; struct file_id id; DATA_BLOB private_data; uint8_t out_oplock_level; uint32_t out_create_action; NTTIME out_creation_time; NTTIME out_last_access_time; NTTIME out_last_write_time; NTTIME out_change_time; uint64_t out_allocation_size; uint64_t out_end_of_file; uint32_t out_file_attributes; uint64_t out_file_id_persistent; uint64_t out_file_id_volatile; struct smb2_create_blobs out_context_blobs; }; static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct smbd_smb2_request *smb2req, uint8_t in_oplock_level, uint32_t in_impersonation_level, uint32_t in_desired_access, uint32_t in_file_attributes, uint32_t in_share_access, uint32_t in_create_disposition, uint32_t in_create_options, const char *in_name, struct smb2_create_blobs in_context_blobs) { struct tevent_req *req = NULL; struct smbd_smb2_create_state *state = NULL; NTSTATUS status; struct smb_request *smb1req = NULL; files_struct *result = NULL; int info; struct smb2_create_blobs out_context_blobs; int requested_oplock_level; struct smb2_create_blob *dhnc = NULL; struct smb2_create_blob *dh2c = NULL; struct smb2_create_blob *dhnq = NULL; struct smb2_create_blob *dh2q = NULL; struct smbXsrv_open *op = NULL; ZERO_STRUCT(out_context_blobs); if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) { requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE; } else { requested_oplock_level = in_oplock_level; } if (smb2req->subreq == NULL) { /* New create call. */ req = tevent_req_create(mem_ctx, &state, struct smbd_smb2_create_state); if (req == NULL) { return NULL; } state->smb2req = smb2req; smb1req = smbd_smb2_fake_smb_request(smb2req); if (tevent_req_nomem(smb1req, req)) { return tevent_req_post(req, ev); } state->smb1req = smb1req; smb2req->subreq = req; DEBUG(10,("smbd_smb2_create: name[%s]\n", in_name)); } else { /* Re-entrant create call. */ req = smb2req->subreq; state = tevent_req_data(req, struct smbd_smb2_create_state); smb1req = state->smb1req; DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n", in_name )); } dhnq = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_DHNQ); dhnc = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_DHNC); dh2q = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_DH2Q); dh2c = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_DH2C); if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) || (dh2q && dh2c)) { /* not both are allowed at the same time */ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } if (dhnc) { uint32_t num_blobs_allowed; if (dhnc->data.length != 16) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } /* * According to MS-SMB2: 3.3.5.9.7, "Handling the * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context", * we should ignore an additional dhnq blob, but fail * the request (with status OBJECT_NAME_NOT_FOUND) if * any other extra create blob has been provided. * * (Note that the cases of an additional dh2q or dh2c blob * which require a different error code, have been treated * above.) * * TODO: * This is only true for the oplock case: * For leases, lease request is required additionally. */ if (dhnq) { num_blobs_allowed = 2; } else { num_blobs_allowed = 1; } if (in_context_blobs.num_blobs != num_blobs_allowed) { tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND); return tevent_req_post(req, ev); } } if (dh2c) { uint32_t num_blobs_allowed; if (dh2c->data.length != 36) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } /* * According to MS-SMB2: 3.3.5.9.12, "Handling the * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context", * we should fail the request with status * OBJECT_NAME_NOT_FOUND if any other create blob has been * provided. * * (Note that the cases of an additional dhnq, dhnc or dh2q * blob which require a different error code, have been * treated above.) * * TODO: * This is only true for the oplock case: * For leases, lease request is required additionally! */ num_blobs_allowed = 1; if (in_context_blobs.num_blobs != num_blobs_allowed) { tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND); return tevent_req_post(req, ev); } } if (IS_IPC(smb1req->conn)) { const char *pipe_name = in_name; if (dhnc || dh2c) { /* durable handles are not supported on IPC$ */ tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND); return tevent_req_post(req, ev); } if (!lp_nt_pipe_support()) { tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED); return tevent_req_post(req, ev); } status = open_np_file(smb1req, pipe_name, &result); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } info = FILE_WAS_OPENED; } else if (CAN_PRINT(smb1req->conn)) { if (dhnc || dh2c) { /* durable handles are not supported on printers */ tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND); return tevent_req_post(req, ev); } status = file_new(smb1req, smb1req->conn, &result); if(!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } status = print_spool_open(result, in_name, smb1req->vuid); if (!NT_STATUS_IS_OK(status)) { file_free(smb1req, result); tevent_req_nterror(req, status); return tevent_req_post(req, ev); } info = FILE_WAS_CREATED; } else { char *fname; struct smb2_create_blob *exta = NULL; struct ea_list *ea_list = NULL; struct smb2_create_blob *mxac = NULL; NTTIME max_access_time = 0; struct smb2_create_blob *secd = NULL; struct security_descriptor *sec_desc = NULL; struct smb2_create_blob *alsi = NULL; uint64_t allocation_size = 0; struct smb2_create_blob *twrp = NULL; struct smb2_create_blob *qfid = NULL; struct GUID _create_guid = GUID_zero(); struct GUID *create_guid = NULL; bool update_open = false; bool durable_requested = false; uint32_t durable_timeout_msec = 0; bool do_durable_reconnect = false; uint64_t persistent_id = 0; exta = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_EXTA); mxac = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_MXAC); secd = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_SECD); alsi = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_ALSI); twrp = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_TWRP); qfid = smb2_create_blob_find(&in_context_blobs, SMB2_CREATE_TAG_QFID); fname = talloc_strdup(state, in_name); if (tevent_req_nomem(fname, req)) { return tevent_req_post(req, ev); } if (exta) { ea_list = read_nttrans_ea_list(mem_ctx, (const char *)exta->data.data, exta->data.length); if (!ea_list) { DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n")); tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } if (ea_list_has_invalid_name(ea_list)) { tevent_req_nterror(req, STATUS_INVALID_EA_NAME); return tevent_req_post(req, ev); } } if (mxac) { if (mxac->data.length == 0) { max_access_time = 0; } else if (mxac->data.length == 8) { max_access_time = BVAL(mxac->data.data, 0); } else { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } } if (secd) { enum ndr_err_code ndr_err; sec_desc = talloc_zero(state, struct security_descriptor); if (tevent_req_nomem(sec_desc, req)) { return tevent_req_post(req, ev); } ndr_err = ndr_pull_struct_blob(&secd->data, sec_desc, sec_desc, (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { DEBUG(2,("ndr_pull_security_descriptor failed: %s\n", ndr_errstr(ndr_err))); tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } } if (dhnq) { if (dhnq->data.length != 16) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } if (dh2q) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } /* * durable handle request is processed below. */ durable_requested = true; /* * Set the timeout to 16 mins. * * TODO: test this against Windows 2012 * as the default for durable v2 is 1 min. */ durable_timeout_msec = (16*60*1000); } if (dh2q) { const uint8_t *p = dh2q->data.data; uint32_t durable_v2_timeout = 0; DATA_BLOB create_guid_blob; if (dh2q->data.length != 32) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } if (dhnq) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } durable_v2_timeout = IVAL(p, 0); create_guid_blob = data_blob_const(p + 16, 16); status = GUID_from_ndr_blob(&create_guid_blob, &_create_guid); if (tevent_req_nterror(req, status)) { return tevent_req_post(req, ev); } create_guid = &_create_guid; /* * we need to store the create_guid later */ update_open = true; /* * durable handle v2 request processed below */ durable_requested = true; durable_timeout_msec = durable_v2_timeout; if (durable_timeout_msec == 0) { /* * Set the timeout to 1 min as default. * * This matches Windows 2012. */ durable_timeout_msec = (60*1000); } } if (dhnc) { persistent_id = BVAL(dhnc->data.data, 0); do_durable_reconnect = true; } if (dh2c) { const uint8_t *p = dh2c->data.data; DATA_BLOB create_guid_blob; persistent_id = BVAL(p, 0); create_guid_blob = data_blob_const(p + 16, 16); status = GUID_from_ndr_blob(&create_guid_blob, &_create_guid); if (tevent_req_nterror(req, status)) { return tevent_req_post(req, ev); } create_guid = &_create_guid; do_durable_reconnect = true; } if (alsi) { if (alsi->data.length != 8) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } allocation_size = BVAL(alsi->data.data, 0); } if (twrp) { NTTIME nttime; time_t t; struct tm *tm; if (twrp->data.length != 8) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } nttime = BVAL(twrp->data.data, 0); t = nt_time_to_unix(nttime); tm = gmtime(&t); TALLOC_FREE(fname); fname = talloc_asprintf(state, "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, in_name); if (tevent_req_nomem(fname, req)) { return tevent_req_post(req, ev); } } if (qfid) { if (qfid->data.length != 0) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } } /* these are ignored for SMB2 */ in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */ in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */ in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS; DEBUG(10, ("smbd_smb2_create_send: open execution phase\n")); /* * For the backend file open procedure, there are * two possible modes: durable_reconnect or not. */ if (do_durable_reconnect) { DATA_BLOB new_cookie = data_blob_null; NTTIME now = timeval_to_nttime(&smb2req->request_time); status = smb2srv_open_recreate(smb2req->sconn->conn, smb1req->conn->session_info, persistent_id, create_guid, now, &op); if (!NT_STATUS_IS_OK(status)) { DEBUG(3, ("smbd_smb2_create_send: " "smb2srv_open_recreate failed: %s\n", nt_errstr(status))); tevent_req_nterror(req, status); return tevent_req_post(req, ev); } DEBUG(10, ("smb2_create_send: %s to recreate the " "smb2srv_open struct for a durable handle.\n", op->global->durable ? "succeded" : "failed")); if (!op->global->durable) { talloc_free(op); tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND); return tevent_req_post(req, ev); } status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn, smb1req, op, /* smbXsrv_open input */ op->global->backend_cookie, op, /* TALLOC_CTX */ &result, &new_cookie); if (!NT_STATUS_IS_OK(status)) { NTSTATUS return_status; return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND; DEBUG(3, ("smbd_smb2_create_send: " "durable_reconnect failed: %s => %s\n", nt_errstr(status), nt_errstr(return_status))); tevent_req_nterror(req, return_status); return tevent_req_post(req, ev); } data_blob_free(&op->global->backend_cookie); op->global->backend_cookie = new_cookie; op->status = NT_STATUS_OK; op->global->disconnect_time = 0; /* save the timout for later update */ durable_timeout_msec = op->global->durable_timeout_msec; update_open = true; info = FILE_WAS_OPENED; } else { struct smb_filename *smb_fname = NULL; /* * For a DFS path the function parse_dfs_path() * will do the path processing. */ if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) { /* convert '\\' into '/' */ status = check_path_syntax(fname); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } } status = filename_convert(req, smb1req->conn, smb1req->flags2 & FLAGS2_DFS_PATHNAMES, fname, UCF_PREP_CREATEFILE, NULL, /* ppath_contains_wcards */ &smb_fname); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } status = SMB_VFS_CREATE_FILE(smb1req->conn, smb1req, 0, /* root_dir_fid */ smb_fname, in_desired_access, in_share_access, in_create_disposition, in_create_options, in_file_attributes, map_smb2_oplock_levels_to_samba(requested_oplock_level), allocation_size, 0, /* private_flags */ sec_desc, ea_list, &result, &info); if (!NT_STATUS_IS_OK(status)) { if (open_was_deferred(smb1req->sconn, smb1req->mid)) { return req; } tevent_req_nterror(req, status); return tevent_req_post(req, ev); } op = result->op; } /* * here we have op == result->op */ DEBUG(10, ("smbd_smb2_create_send: " "response construction phase\n")); if (mxac) { NTTIME last_write_time; unix_timespec_to_nt_time(&last_write_time, result->fsp_name->st.st_ex_mtime); if (last_write_time != max_access_time) { uint8_t p[8]; uint32_t max_access_granted; DATA_BLOB blob = data_blob_const(p, sizeof(p)); status = smbd_calculate_access_mask(smb1req->conn, result->fsp_name, false, SEC_FLAG_MAXIMUM_ALLOWED, &max_access_granted); SIVAL(p, 0, NT_STATUS_V(status)); SIVAL(p, 4, max_access_granted); status = smb2_create_blob_add(state, &out_context_blobs, SMB2_CREATE_TAG_MXAC, blob); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } } } if (durable_requested && BATCH_OPLOCK_TYPE(result->oplock_type)) { status = SMB_VFS_DURABLE_COOKIE(result, op, &op->global->backend_cookie); if (!NT_STATUS_IS_OK(status)) { op->global->backend_cookie = data_blob_null; } } if (op->global->backend_cookie.length > 0) { update_open = true; op->global->durable = true; op->global->durable_timeout_msec = durable_timeout_msec; } if (update_open) { op->global->create_guid = _create_guid; status = smbXsrv_open_update(op); DEBUG(10, ("smb2_create_send: smbXsrv_open_update " "returned %s\n", nt_errstr(status))); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } } if (dhnq && op->global->durable) { uint8_t p[8] = { 0, }; DATA_BLOB blob = data_blob_const(p, sizeof(p)); status = smb2_create_blob_add(state, &out_context_blobs, SMB2_CREATE_TAG_DHNQ, blob); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } } if (dh2q && op->global->durable) { uint8_t p[8] = { 0, }; DATA_BLOB blob = data_blob_const(p, sizeof(p)); uint32_t durable_v2_response_flags = 0; SIVAL(p, 0, op->global->durable_timeout_msec); SIVAL(p, 4, durable_v2_response_flags); status = smb2_create_blob_add(state, &out_context_blobs, SMB2_CREATE_TAG_DH2Q, blob); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } } if (qfid) { uint8_t p[32]; uint64_t file_index = get_FileIndex(result->conn, &result->fsp_name->st); DATA_BLOB blob = data_blob_const(p, sizeof(p)); ZERO_STRUCT(p); /* From conversations with Microsoft engineers at the MS plugfest. The first 8 bytes are the "volume index" == inode, the second 8 bytes are the "volume id", == dev. This will be updated in the SMB2 doc. */ SBVAL(p, 0, file_index); SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */ status = smb2_create_blob_add(state, &out_context_blobs, SMB2_CREATE_TAG_QFID, blob); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } } } smb2req->compat_chain_fsp = smb1req->chain_fsp; if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) { state->out_oplock_level = in_oplock_level; } else { state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type); } if ((in_create_disposition == FILE_SUPERSEDE) && (info == FILE_WAS_OVERWRITTEN)) { state->out_create_action = FILE_WAS_SUPERSEDED; } else { state->out_create_action = info; } state->out_file_attributes = dos_mode(result->conn, result->fsp_name); unix_timespec_to_nt_time(&state->out_creation_time, get_create_timespec(smb1req->conn, result, result->fsp_name)); unix_timespec_to_nt_time(&state->out_last_access_time, result->fsp_name->st.st_ex_atime); unix_timespec_to_nt_time(&state->out_last_write_time, result->fsp_name->st.st_ex_mtime); unix_timespec_to_nt_time(&state->out_change_time, get_change_timespec(smb1req->conn, result, result->fsp_name)); state->out_allocation_size = SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result, &(result->fsp_name->st)); state->out_end_of_file = result->fsp_name->st.st_ex_size; if (state->out_file_attributes == 0) { state->out_file_attributes = FILE_ATTRIBUTE_NORMAL; } state->out_file_id_persistent = result->op->global->open_persistent_id; state->out_file_id_volatile = result->op->global->open_volatile_id; state->out_context_blobs = out_context_blobs; DEBUG(10,("smbd_smb2_create_send: %s - %s\n", fsp_str_dbg(result), fsp_fnum_dbg(result))); tevent_req_done(req); return tevent_req_post(req, ev); } static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, uint8_t *out_oplock_level, uint32_t *out_create_action, NTTIME *out_creation_time, NTTIME *out_last_access_time, NTTIME *out_last_write_time, NTTIME *out_change_time, uint64_t *out_allocation_size, uint64_t *out_end_of_file, uint32_t *out_file_attributes, uint64_t *out_file_id_persistent, uint64_t *out_file_id_volatile, struct smb2_create_blobs *out_context_blobs) { NTSTATUS status; struct smbd_smb2_create_state *state = tevent_req_data(req, struct smbd_smb2_create_state); if (tevent_req_is_nterror(req, &status)) { tevent_req_received(req); return status; } *out_oplock_level = state->out_oplock_level; *out_create_action = state->out_create_action; *out_creation_time = state->out_creation_time; *out_last_access_time = state->out_last_access_time; *out_last_write_time = state->out_last_write_time; *out_change_time = state->out_change_time; *out_allocation_size = state->out_allocation_size; *out_end_of_file = state->out_end_of_file; *out_file_attributes = state->out_file_attributes; *out_file_id_persistent = state->out_file_id_persistent; *out_file_id_volatile = state->out_file_id_volatile; *out_context_blobs = state->out_context_blobs; talloc_steal(mem_ctx, state->out_context_blobs.blobs); tevent_req_received(req); return NT_STATUS_OK; } /********************************************************* Code for dealing with deferred opens. *********************************************************/ bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req, struct timeval *p_request_time, void **pp_state) { struct smbd_smb2_create_state *state = NULL; struct tevent_req *req = NULL; if (!smb2req) { return false; } req = smb2req->subreq; if (!req) { return false; } state = tevent_req_data(req, struct smbd_smb2_create_state); if (!state) { return false; } if (!state->open_was_deferred) { return false; } if (p_request_time) { *p_request_time = state->request_time; } if (pp_state) { *pp_state = (void *)state->private_data.data; } return true; } /********************************************************* Re-process this call early - requested by message or close. *********************************************************/ static struct smbd_smb2_request *find_open_smb2req( struct smbd_server_connection *sconn, uint64_t mid) { struct smbd_smb2_request *smb2req; for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) { uint64_t message_id; if (smb2req->subreq == NULL) { /* This message has been processed. */ continue; } if (!tevent_req_is_in_progress(smb2req->subreq)) { /* This message has been processed. */ continue; } message_id = get_mid_from_smb2req(smb2req); if (message_id == mid) { return smb2req; } } return NULL; } bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid) { struct smbd_smb2_create_state *state = NULL; struct smbd_smb2_request *smb2req; smb2req = find_open_smb2req(sconn, mid); if (!smb2req) { DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n", (unsigned long long)mid)); return false; } if (!smb2req->subreq) { return false; } if (!tevent_req_is_in_progress(smb2req->subreq)) { return false; } state = tevent_req_data(smb2req->subreq, struct smbd_smb2_create_state); if (!state) { return false; } /* It's not in progress if there's no timeout event. */ if (!state->open_was_deferred) { return false; } DEBUG(10,("open_was_deferred_smb2: mid = %llu\n", (unsigned long long)mid)); return true; } static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req, uint64_t mid) { struct smbd_smb2_create_state *state = NULL; if (!smb2req->subreq) { return; } if (!tevent_req_is_in_progress(smb2req->subreq)) { return; } state = tevent_req_data(smb2req->subreq, struct smbd_smb2_create_state); if (!state) { return; } DEBUG(10,("remove_deferred_open_message_smb2_internal: " "mid %llu\n", (unsigned long long)mid )); state->open_was_deferred = false; /* Ensure we don't have any outstanding timer event. */ TALLOC_FREE(state->te); /* Ensure we don't have any outstanding immediate event. */ TALLOC_FREE(state->im); } void remove_deferred_open_message_smb2( struct smbd_server_connection *sconn, uint64_t mid) { struct smbd_smb2_request *smb2req; smb2req = find_open_smb2req(sconn, mid); if (!smb2req) { DEBUG(10,("remove_deferred_open_message_smb2: " "can't find mid %llu\n", (unsigned long long)mid )); return; } remove_deferred_open_message_smb2_internal(smb2req, mid); } static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx, struct tevent_immediate *im, void *private_data) { struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data, struct smbd_smb2_request); struct smbd_server_connection *sconn = smb2req->sconn; uint64_t mid = get_mid_from_smb2req(smb2req); NTSTATUS status; DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: " "re-dispatching mid %llu\n", (unsigned long long)mid )); status = smbd_smb2_request_dispatch(smb2req); if (!NT_STATUS_IS_OK(status)) { smbd_server_connection_terminate(sconn, nt_errstr(status)); return; } } bool schedule_deferred_open_message_smb2( struct smbd_server_connection *sconn, uint64_t mid) { struct smbd_smb2_create_state *state = NULL; struct smbd_smb2_request *smb2req; smb2req = find_open_smb2req(sconn, mid); if (!smb2req) { DEBUG(10,("schedule_deferred_open_message_smb2: " "can't find mid %llu\n", (unsigned long long)mid )); return false; } if (!smb2req->subreq) { return false; } if (!tevent_req_is_in_progress(smb2req->subreq)) { return false; } state = tevent_req_data(smb2req->subreq, struct smbd_smb2_create_state); if (!state) { return false; } /* Ensure we don't have any outstanding timer event. */ TALLOC_FREE(state->te); /* Ensure we don't have any outstanding immediate event. */ TALLOC_FREE(state->im); /* * This is subtle. We must null out the callback * before rescheduling, else the first call to * tevent_req_nterror() causes the _receive() * function to be called, this causing tevent_req_post() * to crash. */ tevent_req_set_callback(smb2req->subreq, NULL, NULL); state->im = tevent_create_immediate(smb2req); if (!state->im) { smbd_server_connection_terminate(smb2req->sconn, nt_errstr(NT_STATUS_NO_MEMORY)); return false; } DEBUG(10,("schedule_deferred_open_message_smb2: " "re-processing mid %llu\n", (unsigned long long)mid )); tevent_schedule_immediate(state->im, smb2req->sconn->ev_ctx, smbd_smb2_create_request_dispatch_immediate, smb2req); return true; } static bool smbd_smb2_create_cancel(struct tevent_req *req) { struct smbd_smb2_request *smb2req = NULL; struct smbd_smb2_create_state *state = tevent_req_data(req, struct smbd_smb2_create_state); uint64_t mid; if (!state) { return false; } if (!state->smb2req) { return false; } smb2req = state->smb2req; mid = get_mid_from_smb2req(smb2req); if (is_deferred_open_async(state->private_data.data)) { /* Can't cancel an async create. */ return false; } remove_deferred_open_message_smb2_internal(smb2req, mid); tevent_req_defer_callback(req, smb2req->sconn->ev_ctx); tevent_req_nterror(req, NT_STATUS_CANCELLED); return true; } bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req, struct timeval request_time, struct timeval timeout, struct file_id id, char *private_data, size_t priv_len) { struct tevent_req *req = NULL; struct smbd_smb2_create_state *state = NULL; struct timeval end_time; if (!smb2req) { return false; } req = smb2req->subreq; if (!req) { return false; } state = tevent_req_data(req, struct smbd_smb2_create_state); if (!state) { return false; } state->id = id; state->request_time = request_time; state->private_data = data_blob_talloc(state, private_data, priv_len); if (!state->private_data.data) { return false; } /* Re-schedule us to retry on timer expiry. */ end_time = timeval_sum(&request_time, &timeout); DEBUG(10,("push_deferred_open_message_smb2: " "timeout at %s\n", timeval_string(talloc_tos(), &end_time, true) )); state->open_was_deferred = true; /* allow this request to be canceled */ tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel); return true; }