/* 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 <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "smbd/globals.h" #include "../libcli/smb/smb_common.h" static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req, const char *in_path, uint8_t *out_share_type, uint32_t *out_share_flags, uint32_t *out_capabilities, uint32_t *out_maximal_access, uint32_t *out_tree_id); NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req) { const uint8_t *inbody; int i = req->current_idx; uint8_t *outhdr; DATA_BLOB outbody; size_t expected_body_size = 0x09; size_t body_size; uint16_t in_path_offset; uint16_t in_path_length; DATA_BLOB in_path_buffer; char *in_path_string; size_t in_path_string_size; uint8_t out_share_type = 0; uint32_t out_share_flags = 0; uint32_t out_capabilities = 0; uint32_t out_maximal_access = 0; uint32_t out_tree_id = 0; NTSTATUS status; bool ok; 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_path_offset = SVAL(inbody, 0x04); in_path_length = SVAL(inbody, 0x06); if (in_path_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } if (in_path_length > req->in.vector[i+2].iov_len) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } in_path_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base; in_path_buffer.length = in_path_length; ok = convert_string_talloc(req, CH_UTF16, CH_UNIX, in_path_buffer.data, in_path_buffer.length, &in_path_string, &in_path_string_size, false); if (!ok) { return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER); } status = smbd_smb2_tree_connect(req, in_path_string, &out_share_type, &out_share_flags, &out_capabilities, &out_maximal_access, &out_tree_id); if (!NT_STATUS_IS_OK(status)) { return smbd_smb2_request_error(req, status); } outhdr = (uint8_t *)req->out.vector[i].iov_base; outbody = data_blob_talloc(req->out.vector, NULL, 0x10); if (outbody.data == NULL) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } SIVAL(outhdr, SMB2_HDR_TID, out_tree_id); SSVAL(outbody.data, 0x00, 0x10); /* struct size */ SCVAL(outbody.data, 0x02, out_share_type); /* share type */ SCVAL(outbody.data, 0x03, 0); /* reserved */ SIVAL(outbody.data, 0x04, out_share_flags); /* share flags */ SIVAL(outbody.data, 0x08, out_capabilities); /* capabilities */ SIVAL(outbody.data, 0x0C, out_maximal_access); /* maximal access */ return smbd_smb2_request_done(req, outbody, NULL); } static int smbd_smb2_tcon_destructor(struct smbd_smb2_tcon *tcon) { if (tcon->session == NULL) { return 0; } idr_remove(tcon->session->tcons.idtree, tcon->tid); DLIST_REMOVE(tcon->session->tcons.list, tcon); if (tcon->compat_conn) { set_current_service(tcon->compat_conn, 0, true); close_cnum(tcon->compat_conn, tcon->session->vuid); } tcon->compat_conn = NULL; tcon->tid = 0; tcon->session = NULL; return 0; } static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req, const char *in_path, uint8_t *out_share_type, uint32_t *out_share_flags, uint32_t *out_capabilities, uint32_t *out_maximal_access, uint32_t *out_tree_id) { const char *share = in_path; fstring service; int snum = -1; struct smbd_smb2_tcon *tcon; connection_struct *compat_conn = NULL; user_struct *compat_vuser = req->session->compat_vuser; int id; NTSTATUS status; if (strncmp(share, "\\\\", 2) == 0) { const char *p = strchr(share+2, '\\'); if (p) { share = p + 1; } } DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n", in_path, share)); fstrcpy(service, share); strlower_m(service); /* TODO: do more things... */ if (strequal(service,HOMES_NAME)) { if (compat_vuser->homes_snum == -1) { DEBUG(2, ("[homes] share not available for " "user %s because it was not found " "or created at session setup " "time\n", compat_vuser->server_info->unix_name)); return NT_STATUS_BAD_NETWORK_NAME; } snum = compat_vuser->homes_snum; } else if ((compat_vuser->homes_snum != -1) && strequal(service, lp_servicename(compat_vuser->homes_snum))) { snum = compat_vuser->homes_snum; } else { snum = find_service(service); } if (snum < 0) { DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n", service)); return NT_STATUS_BAD_NETWORK_NAME; } /* create a new tcon as child of the session */ tcon = talloc_zero(req->session, struct smbd_smb2_tcon); if (tcon == NULL) { return NT_STATUS_NO_MEMORY; } id = idr_get_new_random(req->session->tcons.idtree, tcon, req->session->tcons.limit); if (id == -1) { TALLOC_FREE(tcon); return NT_STATUS_INSUFFICIENT_RESOURCES; } tcon->tid = id; tcon->snum = snum; DLIST_ADD_END(req->session->tcons.list, tcon, struct smbd_smb2_tcon *); tcon->session = req->session; talloc_set_destructor(tcon, smbd_smb2_tcon_destructor); compat_conn = make_connection_snum(req->sconn, snum, req->session->compat_vuser, data_blob_null, "???", &status); if (compat_conn == NULL) { TALLOC_FREE(tcon); return status; } tcon->compat_conn = talloc_move(tcon, &compat_conn); tcon->compat_conn->cnum = tcon->tid; if (IS_PRINT(tcon->compat_conn)) { *out_share_type = SMB2_SHARE_TYPE_PRINT; } else if (IS_IPC(tcon->compat_conn)) { *out_share_type = SMB2_SHARE_TYPE_PIPE; } else { *out_share_type = SMB2_SHARE_TYPE_DISK; } *out_share_flags = SMB2_SHAREFLAG_ALLOW_NAMESPACE_CACHING; if (lp_msdfs_root(SNUM(tcon->compat_conn)) && lp_host_msdfs()) { *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT); *out_capabilities = SMB2_SHARE_CAP_DFS; } else { *out_capabilities = 0; } switch(lp_csc_policy(SNUM(tcon->compat_conn))) { case CSC_POLICY_MANUAL: break; case CSC_POLICY_DOCUMENTS: *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING; break; case CSC_POLICY_PROGRAMS: *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING; break; case CSC_POLICY_DISABLE: *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING; break; default: break; } *out_maximal_access = FILE_GENERIC_ALL; *out_tree_id = tcon->tid; return NT_STATUS_OK; } NTSTATUS smbd_smb2_request_check_tcon(struct smbd_smb2_request *req) { const uint8_t *inhdr; const uint8_t *outhdr; int i = req->current_idx; uint32_t in_tid; void *p; struct smbd_smb2_tcon *tcon; bool chained_fixup = false; inhdr = (const uint8_t *)req->in.vector[i+0].iov_base; in_tid = IVAL(inhdr, SMB2_HDR_TID); if (in_tid == (0xFFFFFFFF)) { if (req->async) { /* * async request - fill in tid from * already setup out.vector[].iov_base. */ outhdr = (const uint8_t *)req->out.vector[i].iov_base; in_tid = IVAL(outhdr, SMB2_HDR_TID); } else if (i > 2) { /* * Chained request - fill in tid from * the previous request out.vector[].iov_base. */ outhdr = (const uint8_t *)req->out.vector[i-3].iov_base; in_tid = IVAL(outhdr, SMB2_HDR_TID); chained_fixup = true; } } /* lookup an existing session */ p = idr_find(req->session->tcons.idtree, in_tid); if (p == NULL) { return NT_STATUS_NETWORK_NAME_DELETED; } tcon = talloc_get_type_abort(p, struct smbd_smb2_tcon); if (!change_to_user(tcon->compat_conn,req->session->vuid)) { return NT_STATUS_ACCESS_DENIED; } /* should we pass FLAG_CASELESS_PATHNAMES here? */ if (!set_current_service(tcon->compat_conn, 0, true)) { return NT_STATUS_ACCESS_DENIED; } req->tcon = tcon; if (chained_fixup) { /* Fix up our own outhdr. */ outhdr = (const uint8_t *)req->out.vector[i].iov_base; SIVAL(outhdr, SMB2_HDR_TID, in_tid); } return NT_STATUS_OK; } NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req) { const uint8_t *inbody; int i = req->current_idx; DATA_BLOB outbody; size_t expected_body_size = 0x04; size_t body_size; 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); } /* * TODO: cancel all outstanding requests on the tcon * and delete all file handles. */ TALLOC_FREE(req->tcon); outbody = data_blob_talloc(req->out.vector, NULL, 0x04); if (outbody.data == NULL) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } SSVAL(outbody.data, 0x00, 0x04); /* struct size */ SSVAL(outbody.data, 0x02, 0); /* reserved */ return smbd_smb2_request_done(req, outbody, NULL); }