1/* 2 Unix SMB2 implementation. 3 4 Copyright (C) Stefan Metzmacher 2005 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. 18*/ 19 20/* the context for a single SMB2 request. This is passed to any request-context 21 functions */ 22struct smb2srv_request { 23 /* the smbsrv_connection needs a list of requests queued for send */ 24 struct smb2srv_request *next, *prev; 25 26 /* the server_context contains all context specific to this SMB socket */ 27 struct smbsrv_connection *smb_conn; 28 29 /* conn is only set for operations that have a valid TID */ 30 struct smbsrv_tcon *tcon; 31 32 /* the session context is derived from the vuid */ 33 struct smbsrv_session *session; 34 35#define SMB2SRV_REQ_CTRL_FLAG_NOT_REPLY (1<<0) 36 uint32_t control_flags; 37 38 /* the system time when the request arrived */ 39 struct timeval request_time; 40 41 /* a pointer to the per request union smb_* io structure */ 42 void *io_ptr; 43 44 /* the ntvfs_request */ 45 struct ntvfs_request *ntvfs; 46 47 /* Now the SMB2 specific stuff */ 48 49 /* the status the backend returned */ 50 NTSTATUS status; 51 52 /* for matching request and reply */ 53 uint64_t seqnum; 54 55 /* the id that can be used to cancel the request */ 56 uint32_t pending_id; 57 58 /* the offset to the next SMB2 Header for chained requests */ 59 uint32_t chain_offset; 60 61 /* the status we return for following chained requests */ 62 NTSTATUS chain_status; 63 64 /* chained file handle */ 65 uint8_t _chained_file_handle[16]; 66 uint8_t *chained_file_handle; 67 68 bool is_signed; 69 70 struct smb2_request_buffer in; 71 struct smb2_request_buffer out; 72}; 73 74struct smbsrv_request; 75 76#include "smb_server/smb2/smb2_proto.h" 77 78/* useful way of catching field size errors with file and line number */ 79#define SMB2SRV_CHECK_BODY_SIZE(req, size, dynamic) do { \ 80 size_t is_size = req->in.body_size; \ 81 uint16_t field_size; \ 82 uint16_t want_size = ((dynamic)?(size)+1:(size)); \ 83 if (is_size < (size)) { \ 84 DEBUG(0,("%s: buffer too small 0x%x. Expected 0x%x\n", \ 85 __location__, (unsigned)is_size, (unsigned)want_size)); \ 86 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); \ 87 return; \ 88 }\ 89 field_size = SVAL(req->in.body, 0); \ 90 if (field_size != want_size) { \ 91 DEBUG(0,("%s: unexpected fixed body size 0x%x. Expected 0x%x\n", \ 92 __location__, (unsigned)field_size, (unsigned)want_size)); \ 93 smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); \ 94 return; \ 95 } \ 96} while (0) 97 98#define SMB2SRV_CHECK(cmd) do {\ 99 NTSTATUS _status; \ 100 _status = cmd; \ 101 if (!NT_STATUS_IS_OK(_status)) { \ 102 smb2srv_send_error(req, _status); \ 103 return; \ 104 } \ 105} while (0) 106 107/* useful wrapper for talloc with NO_MEMORY reply */ 108#define SMB2SRV_TALLOC_IO_PTR(ptr, type) do { \ 109 ptr = talloc(req, type); \ 110 if (!ptr) { \ 111 smb2srv_send_error(req, NT_STATUS_NO_MEMORY); \ 112 return; \ 113 } \ 114 req->io_ptr = ptr; \ 115} while (0) 116 117#define SMB2SRV_SETUP_NTVFS_REQUEST(send_fn, state) do { \ 118 req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req, \ 119 req->session->session_info,\ 120 0, \ 121 req->request_time, \ 122 req, send_fn, state); \ 123 if (!req->ntvfs) { \ 124 smb2srv_send_error(req, NT_STATUS_NO_MEMORY); \ 125 return; \ 126 } \ 127 (void)talloc_steal(req->tcon->ntvfs, req); \ 128 req->ntvfs->frontend_data.private_data = req; \ 129} while (0) 130 131#define SMB2SRV_CHECK_FILE_HANDLE(handle) do { \ 132 if (!handle) { \ 133 smb2srv_send_error(req, NT_STATUS_FILE_CLOSED); \ 134 return; \ 135 } \ 136} while (0) 137 138/* 139 check if the backend wants to handle the request asynchronously. 140 if it wants it handled synchronously then call the send function 141 immediately 142*/ 143#define SMB2SRV_CALL_NTVFS_BACKEND(cmd) do { \ 144 req->ntvfs->async_states->status = cmd; \ 145 if (req->ntvfs->async_states->state & NTVFS_ASYNC_STATE_ASYNC) { \ 146 NTSTATUS _status; \ 147 _status = smb2srv_queue_pending(req); \ 148 if (!NT_STATUS_IS_OK(_status)) { \ 149 ntvfs_cancel(req->ntvfs); \ 150 } \ 151 } else { \ 152 req->ntvfs->async_states->send_fn(req->ntvfs); \ 153 } \ 154} while (0) 155 156/* check req->ntvfs->async_states->status and if not OK then send an error reply */ 157#define SMB2SRV_CHECK_ASYNC_STATUS_ERR_SIMPLE do { \ 158 req = talloc_get_type(ntvfs->async_states->private_data, struct smb2srv_request); \ 159 if (ntvfs->async_states->state & NTVFS_ASYNC_STATE_CLOSE || NT_STATUS_EQUAL(ntvfs->async_states->status, NT_STATUS_NET_WRITE_FAULT)) { \ 160 smbsrv_terminate_connection(req->smb_conn, get_friendly_nt_error_msg (ntvfs->async_states->status)); \ 161 talloc_free(req); \ 162 return; \ 163 } \ 164 req->status = ntvfs->async_states->status; \ 165 if (NT_STATUS_IS_ERR(ntvfs->async_states->status)) { \ 166 smb2srv_send_error(req, ntvfs->async_states->status); \ 167 return; \ 168 } \ 169} while (0) 170#define SMB2SRV_CHECK_ASYNC_STATUS_ERR(ptr, type) do { \ 171 SMB2SRV_CHECK_ASYNC_STATUS_ERR_SIMPLE; \ 172 ptr = talloc_get_type(req->io_ptr, type); \ 173} while (0) 174#define SMB2SRV_CHECK_ASYNC_STATUS_SIMPLE do { \ 175 req = talloc_get_type(ntvfs->async_states->private_data, struct smb2srv_request); \ 176 if (ntvfs->async_states->state & NTVFS_ASYNC_STATE_CLOSE || NT_STATUS_EQUAL(ntvfs->async_states->status, NT_STATUS_NET_WRITE_FAULT)) { \ 177 smbsrv_terminate_connection(req->smb_conn, get_friendly_nt_error_msg (ntvfs->async_states->status)); \ 178 talloc_free(req); \ 179 return; \ 180 } \ 181 req->status = ntvfs->async_states->status; \ 182 if (!NT_STATUS_IS_OK(ntvfs->async_states->status)) { \ 183 smb2srv_send_error(req, ntvfs->async_states->status); \ 184 return; \ 185 } \ 186} while (0) 187#define SMB2SRV_CHECK_ASYNC_STATUS(ptr, type) do { \ 188 SMB2SRV_CHECK_ASYNC_STATUS_SIMPLE; \ 189 ptr = talloc_get_type(req->io_ptr, type); \ 190} while (0) 191