/* 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/globals.h" #include "../source4/libcli/smb2/smb2_constants.h" struct smbd_smb2_lock_element { uint64_t offset; uint64_t length; uint32_t flags; }; static struct tevent_req *smbd_smb2_lock_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct smbd_smb2_request *smb2req, uint32_t in_smbpid, uint64_t in_file_id_volatile, uint16_t in_lock_count, struct smbd_smb2_lock_element *in_locks); static NTSTATUS smbd_smb2_lock_recv(struct tevent_req *req); static void smbd_smb2_request_lock_done(struct tevent_req *subreq); NTSTATUS smbd_smb2_request_process_lock(struct smbd_smb2_request *req) { const uint8_t *inhdr; const uint8_t *inbody; const int i = req->current_idx; size_t expected_body_size = 0x30; size_t body_size; uint32_t in_smbpid; uint16_t in_lock_count; uint64_t in_file_id_persistent; uint64_t in_file_id_volatile; struct smbd_smb2_lock_element *in_locks; struct tevent_req *subreq; const uint8_t *lock_buffer; uint16_t l; inhdr = (const uint8_t *)req->in.vector[i+0].iov_base; if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } inbody = (const uint8_t *)req->in.vector[i+1].iov_base; body_size = SVAL(inbody, 0x00); if (body_size != expected_body_size) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } in_smbpid = IVAL(inhdr, SMB2_HDR_PID); in_lock_count = CVAL(inbody, 0x02); /* 0x04 - 4 bytes reserved */ in_file_id_persistent = BVAL(inbody, 0x08); in_file_id_volatile = BVAL(inbody, 0x10); if (in_lock_count < 1) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } if (((in_lock_count - 1) * 0x18) > req->in.vector[i+2].iov_len) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } if (req->compat_chain_fsp) { /* skip check */ } else if (in_file_id_persistent != 0) { return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED); } in_locks = talloc_array(req, struct smbd_smb2_lock_element, in_lock_count); if (in_locks == NULL) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } l = 0; lock_buffer = inbody + 0x18; in_locks[l].offset = BVAL(lock_buffer, 0x00); in_locks[l].length = BVAL(lock_buffer, 0x08); in_locks[l].flags = IVAL(lock_buffer, 0x10); /* 0x14 - 4 reserved bytes */ lock_buffer = (const uint8_t *)req->in.vector[i+2].iov_base; for (l=1; l < in_lock_count; l++) { in_locks[l].offset = BVAL(lock_buffer, 0x00); in_locks[l].length = BVAL(lock_buffer, 0x08); in_locks[l].flags = IVAL(lock_buffer, 0x10); /* 0x14 - 4 reserved bytes */ lock_buffer += 0x18; } subreq = smbd_smb2_lock_send(req, req->conn->smb2.event_ctx, req, in_smbpid, in_file_id_volatile, in_lock_count, in_locks); if (subreq == NULL) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } tevent_req_set_callback(subreq, smbd_smb2_request_lock_done, req); if (tevent_req_is_in_progress(subreq)) { return smbd_smb2_request_pending_queue(req); } return NT_STATUS_OK; } static void smbd_smb2_request_lock_done(struct tevent_req *subreq) { struct smbd_smb2_request *req = tevent_req_callback_data(subreq, struct smbd_smb2_request); DATA_BLOB outbody; NTSTATUS status; NTSTATUS error; /* transport error */ status = smbd_smb2_lock_recv(subreq); TALLOC_FREE(subreq); if (!NT_STATUS_IS_OK(status)) { error = smbd_smb2_request_error(req, status); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(req->conn, nt_errstr(error)); return; } return; } outbody = data_blob_talloc(req->out.vector, NULL, 0x04); 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->conn, nt_errstr(error)); return; } return; } SSVAL(outbody.data, 0x00, 0x04); /* struct size */ SSVAL(outbody.data, 0x02, 0); /* reserved */ error = smbd_smb2_request_done(req, outbody, NULL); if (!NT_STATUS_IS_OK(error)) { smbd_server_connection_terminate(req->conn, nt_errstr(error)); return; } } struct smbd_smb2_lock_state { struct smbd_smb2_request *smb2req; }; static struct tevent_req *smbd_smb2_lock_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct smbd_smb2_request *smb2req, uint32_t in_smbpid, uint64_t in_file_id_volatile, uint16_t in_lock_count, struct smbd_smb2_lock_element *in_locks) { struct tevent_req *req; struct smbd_smb2_lock_state *state; struct smb_request *smbreq; connection_struct *conn = smb2req->tcon->compat_conn; files_struct *fsp; int32_t timeout = -1; bool isunlock = false; uint16_t i; struct smbd_lock_element *locks; NTSTATUS status; bool async = false; req = tevent_req_create(mem_ctx, &state, struct smbd_smb2_lock_state); if (req == NULL) { return NULL; } state->smb2req = smb2req; DEBUG(10,("smbd_smb2_lock_send: file_id[0x%016llX]\n", (unsigned long long)in_file_id_volatile)); smbreq = smbd_smb2_fake_smb_request(smb2req); if (tevent_req_nomem(smbreq, req)) { return tevent_req_post(req, ev); } fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile); if (fsp == NULL) { tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); return tevent_req_post(req, ev); } if (conn != fsp->conn) { tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); return tevent_req_post(req, ev); } if (smb2req->session->vuid != fsp->vuid) { tevent_req_nterror(req, NT_STATUS_FILE_CLOSED); return tevent_req_post(req, ev); } locks = talloc_array(state, struct smbd_lock_element, in_lock_count); if (locks == NULL) { tevent_req_nterror(req, NT_STATUS_NO_MEMORY); return tevent_req_post(req, ev); } switch (in_locks[0].flags) { case SMB2_LOCK_FLAG_SHARED: case SMB2_LOCK_FLAG_EXCLUSIVE: if (in_lock_count > 1) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } timeout = -1; break; case SMB2_LOCK_FLAG_SHARED|SMB2_LOCK_FLAG_FAIL_IMMEDIATELY: case SMB2_LOCK_FLAG_EXCLUSIVE|SMB2_LOCK_FLAG_FAIL_IMMEDIATELY: timeout = 0; break; case SMB2_LOCK_FLAG_UNLOCK: /* only the first lock gives the UNLOCK bit - see MS-SMB2 3.3.5.14 */ isunlock = true; timeout = 0; break; default: tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } for (i=0; i 0) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } if (isunlock) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } break; case SMB2_LOCK_FLAG_SHARED|SMB2_LOCK_FLAG_FAIL_IMMEDIATELY: case SMB2_LOCK_FLAG_EXCLUSIVE|SMB2_LOCK_FLAG_FAIL_IMMEDIATELY: if (isunlock) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } break; case SMB2_LOCK_FLAG_UNLOCK: if (!isunlock) { tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } break; default: if (isunlock) { /* * is the first element was a UNLOCK * we need to deferr the error response * to the backend, because we need to process * all unlock elements before */ invalid = true; break; } tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); return tevent_req_post(req, ev); } locks[i].smbpid = in_smbpid; locks[i].offset = in_locks[i].offset; locks[i].count = in_locks[i].length; if (in_locks[i].flags & SMB2_LOCK_FLAG_EXCLUSIVE) { locks[i].brltype = WRITE_LOCK; } else if (in_locks[i].flags & SMB2_LOCK_FLAG_SHARED) { locks[i].brltype = READ_LOCK; } else if (invalid) { /* * this is an invalid UNLOCK element * and the backend needs to test for * brltype != UNLOCK_LOCK and return * NT_STATUS_INVALID_PARAMER */ locks[i].brltype = READ_LOCK; } else { locks[i].brltype = UNLOCK_LOCK; } max_count = UINT64_MAX - locks[i].offset; if (locks[i].count > max_count) { tevent_req_nterror(req, NT_STATUS_INVALID_LOCK_RANGE); return tevent_req_post(req, ev); } } if (isunlock) { status = smbd_do_locking(smbreq, fsp, 0, timeout, in_lock_count, locks, 0, NULL, &async); } else { status = smbd_do_locking(smbreq, fsp, 0, timeout, 0, NULL, in_lock_count, locks, &async); } if (!NT_STATUS_IS_OK(status)) { if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_LOCK_CONFLICT)) { status = NT_STATUS_LOCK_NOT_GRANTED; } tevent_req_nterror(req, status); return tevent_req_post(req, ev); } if (async) { tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR); return tevent_req_post(req, ev); } tevent_req_done(req); return tevent_req_post(req, ev); } static NTSTATUS smbd_smb2_lock_recv(struct tevent_req *req) { NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { tevent_req_received(req); return status; } tevent_req_received(req); return NT_STATUS_OK; }