/* Unix SMB/CIFS implementation. SMB2 Find Copyright (C) Andrew Tridgell 2003 Copyright (c) Stefan Metzmacher 2006 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 <http://www.gnu.org/licenses/>. */ /* This file handles the parsing of transact2 requests */ #include "includes.h" #include "libcli/smb2/smb2.h" #include "libcli/smb2/smb2_calls.h" #include "smb_server/smb_server.h" #include "smb_server/service_smb_proto.h" #include "smb_server/smb2/smb2_server.h" #include "ntvfs/ntvfs.h" /* a structure to encapsulate the state information about an in-progress ffirst/fnext operation */ struct smb2srv_find_state { struct smb2srv_request *req; struct smb2_find *info; union smb_search_first *ff; union smb_search_next *fn; uint32_t last_entry_offset; }; /* callback function for SMB2 Find */ static bool smb2srv_find_callback(void *private, const union smb_search_data *file) { struct smb2srv_find_state *state = talloc_get_type(private, struct smb2srv_find_state); struct smb2_find *info = state->info; uint32_t old_length; NTSTATUS status; old_length = info->out.blob.length; status = smbsrv_push_passthru_search(state, &info->out.blob, info->data_level, file, STR_UNICODE); if (!NT_STATUS_IS_OK(status) || info->out.blob.length > info->in.max_response_size) { /* restore the old length and tell the backend to stop */ smbsrv_blob_grow_data(state, &info->out.blob, old_length); return false; } state->last_entry_offset = old_length; return true; } static void smb2srv_find_send(struct ntvfs_request *ntvfs) { struct smb2srv_request *req; struct smb2srv_find_state *state; SMB2SRV_CHECK_ASYNC_STATUS(state, struct smb2srv_find_state); SMB2SRV_CHECK(smb2srv_setup_reply(req, 0x08, true, state->info->out.blob.length)); if (state->info->out.blob.length > 0) { SIVAL(state->info->out.blob.data + state->last_entry_offset, 0, 0); } SMB2SRV_CHECK(smb2_push_o16s32_blob(&req->out, 0x02, state->info->out.blob)); smb2srv_send_reply(req); } static NTSTATUS smb2srv_find_backend(struct smb2srv_find_state *state) { struct smb2_find *info = state->info; switch (info->in.level) { case SMB2_FIND_DIRECTORY_INFO: info->data_level = RAW_SEARCH_DATA_DIRECTORY_INFO; break; case SMB2_FIND_FULL_DIRECTORY_INFO: info->data_level = RAW_SEARCH_DATA_FULL_DIRECTORY_INFO; break; case SMB2_FIND_BOTH_DIRECTORY_INFO: info->data_level = RAW_SEARCH_DATA_BOTH_DIRECTORY_INFO; break; case SMB2_FIND_NAME_INFO: info->data_level = RAW_SEARCH_DATA_NAME_INFO; break; case SMB2_FIND_ID_BOTH_DIRECTORY_INFO: info->data_level = RAW_SEARCH_DATA_ID_BOTH_DIRECTORY_INFO; break; case SMB2_FIND_ID_FULL_DIRECTORY_INFO: info->data_level = RAW_SEARCH_DATA_ID_FULL_DIRECTORY_INFO; break; default: return NT_STATUS_FOOBAR; } if (info->in.continue_flags & SMB2_CONTINUE_FLAG_REOPEN) { state->ff = talloc(state, union smb_search_first); NT_STATUS_HAVE_NO_MEMORY(state->ff); state->ff->smb2 = *info; state->info = &state->ff->smb2; ZERO_STRUCT(state->ff->smb2.out); return ntvfs_search_first(state->req->ntvfs, state->ff, state, smb2srv_find_callback); } else { state->fn = talloc(state, union smb_search_next); NT_STATUS_HAVE_NO_MEMORY(state->fn); state->fn->smb2 = *info; state->info = &state->fn->smb2; ZERO_STRUCT(state->fn->smb2.out); return ntvfs_search_next(state->req->ntvfs, state->fn, state, smb2srv_find_callback); } /* should not be reached */ return NT_STATUS_INTERNAL_ERROR; } void smb2srv_find_recv(struct smb2srv_request *req) { struct smb2srv_find_state *state; struct smb2_find *info; SMB2SRV_CHECK_BODY_SIZE(req, 0x20, true); SMB2SRV_TALLOC_IO_PTR(info, struct smb2_find); /* this overwrites req->io_ptr !*/ SMB2SRV_TALLOC_IO_PTR(state, struct smb2srv_find_state); state->req = req; state->info = info; state->ff = NULL; state->fn = NULL; state->last_entry_offset= 0; SMB2SRV_SETUP_NTVFS_REQUEST(smb2srv_find_send, NTVFS_ASYNC_STATE_MAY_ASYNC); info->level = RAW_SEARCH_SMB2; info->data_level = RAW_SEARCH_DATA_GENERIC;/* will be overwritten later */ info->in.level = CVAL(req->in.body, 0x02); info->in.continue_flags = CVAL(req->in.body, 0x03); info->in.file_index = IVAL(req->in.body, 0x04); info->in.file.ntvfs = smb2srv_pull_handle(req, req->in.body, 0x08); SMB2SRV_CHECK(smb2_pull_o16s16_string(&req->in, info, req->in.body+0x18, &info->in.pattern)); info->in.max_response_size = IVAL(req->in.body, 0x1C); /* the VFS backend does not yet handle NULL patterns */ if (info->in.pattern == NULL) { info->in.pattern = ""; } SMB2SRV_CHECK_FILE_HANDLE(info->in.file.ntvfs); SMB2SRV_CALL_NTVFS_BACKEND(smb2srv_find_backend(state)); }