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/*
Unix SMB2 implementation.
Copyright (C) Andrew Tridgell 2005
Copyright (C) Stefan Metzmacher 2005
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/time.h"
#include "smbd/service_stream.h"
#include "libcli/smb2/smb2.h"
#include "smb_server/smb_server.h"
#include "smb_server/smb2/smb2_server.h"
#include "lib/stream/packet.h"
static struct smb2srv_request *smb2srv_init_request(struct smbsrv_connection *smb_conn)
{
struct smb2srv_request *req;
req = talloc_zero(smb_conn, struct smb2srv_request);
if (!req) return NULL;
req->smb_conn = smb_conn;
return req;
}
NTSTATUS smb2srv_setup_reply(struct smb2srv_request *req, uint_t body_fixed_size, uint_t body_dynamic_size)
{
req->out.size = SMB2_HDR_BODY+NBT_HDR_SIZE+body_fixed_size;
req->out.allocated = req->out.size + body_dynamic_size;
req->out.buffer = talloc_size(req, req->out.allocated);
NT_STATUS_HAVE_NO_MEMORY(req->out.buffer);
req->out.hdr = req->out.buffer + NBT_HDR_SIZE;
req->out.body = req->out.hdr + SMB2_HDR_BODY;
req->out.body_size = body_fixed_size;
req->out.dynamic = (body_dynamic_size ? req->out.body + body_fixed_size : NULL);
SIVAL(req->out.hdr, 0, SMB2_MAGIC);
SSVAL(req->out.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
SSVAL(req->out.hdr, SMB2_HDR_PAD1, 0);
SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(req->status));
SSVAL(req->out.hdr, SMB2_HDR_OPCODE, SVAL(req->in.hdr, SMB2_HDR_OPCODE));
SSVAL(req->out.hdr, SMB2_HDR_PAD2, 0);
SIVAL(req->out.hdr, SMB2_HDR_FLAGS, 0x00000001);
SIVAL(req->out.hdr, SMB2_HDR_UNKNOWN, 0);
SBVAL(req->out.hdr, SMB2_HDR_SEQNUM, req->seqnum);
SIVAL(req->out.hdr, SMB2_HDR_PID, IVAL(req->in.hdr, SMB2_HDR_PID));
SIVAL(req->out.hdr, SMB2_HDR_TID, IVAL(req->in.hdr, SMB2_HDR_TID));
SBVAL(req->out.hdr, SMB2_HDR_UID, BVAL(req->in.hdr, SMB2_HDR_UID));
memset(req->out.hdr+SMB2_HDR_SIG, 0, 16);
/* set the length of the fixed body part and +1 if there's a dynamic part also */
SSVAL(req->out.body, 0, body_fixed_size + (body_dynamic_size?1:0));
/*
* if we have a dynamic part, make sure the first byte
* which is always be part of the packet is initialized
*/
if (body_dynamic_size) {
SCVAL(req->out.dynamic, 0, 0);
}
return NT_STATUS_OK;
}
void smb2srv_send_reply(struct smb2srv_request *req)
{
DATA_BLOB blob;
NTSTATUS status;
if (req->out.size > NBT_HDR_SIZE) {
_smb_setlen(req->out.buffer, req->out.size - NBT_HDR_SIZE);
}
blob = data_blob_const(req->out.buffer, req->out.size);
status = packet_send(req->smb_conn->packet, blob);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
}
talloc_free(req);
}
void smb2srv_send_error(struct smb2srv_request *req, NTSTATUS error)
{
NTSTATUS status;
status = smb2srv_setup_reply(req, 8, 1);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
talloc_free(req);
return;
}
SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(error));
SSVAL(req->out.body, 0x02, 0);
SIVAL(req->out.body, 0x04, 0);
smb2srv_send_reply(req);
}
static NTSTATUS smb2srv_reply(struct smb2srv_request *req)
{
uint16_t opcode;
uint32_t tid;
uint64_t uid;
opcode = SVAL(req->in.hdr, SMB2_HDR_OPCODE);
req->seqnum = BVAL(req->in.hdr, SMB2_HDR_SEQNUM);
tid = IVAL(req->in.hdr, SMB2_HDR_TID);
uid = BVAL(req->in.hdr, SMB2_HDR_UID);
req->session = smbsrv_session_find(req->smb_conn, uid);
req->tcon = smbsrv_smb2_tcon_find(req->session, tid);
errno = 0;
/* TODO: check the seqnum */
switch (opcode) {
case SMB2_OP_NEGPROT:
smb2srv_negprot_recv(req);
return NT_STATUS_OK;
case SMB2_OP_SESSSETUP:
smb2srv_sesssetup_recv(req);
return NT_STATUS_OK;
case SMB2_OP_LOGOFF:
if (!req->session) goto nosession;
smb2srv_logoff_recv(req);
return NT_STATUS_OK;
case SMB2_OP_TCON:
if (!req->session) goto nosession;
smb2srv_tcon_recv(req);
return NT_STATUS_OK;
case SMB2_OP_TDIS:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_tdis_recv(req);
return NT_STATUS_OK;
case SMB2_OP_CREATE:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_create_recv(req);
return NT_STATUS_OK;
case SMB2_OP_CLOSE:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_close_recv(req);
return NT_STATUS_OK;
case SMB2_OP_FLUSH:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_flush_recv(req);
return NT_STATUS_OK;
case SMB2_OP_READ:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_read_recv(req);
return NT_STATUS_OK;
case SMB2_OP_WRITE:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_write_recv(req);
return NT_STATUS_OK;
case SMB2_OP_LOCK:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_lock_recv(req);
return NT_STATUS_OK;
case SMB2_OP_IOCTL:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_ioctl_recv(req);
return NT_STATUS_OK;
case SMB2_OP_CANCEL:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_cancel_recv(req);
return NT_STATUS_OK;
case SMB2_OP_KEEPALIVE:
smb2srv_keepalive_recv(req);
return NT_STATUS_OK;
case SMB2_OP_FIND:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_find_recv(req);
return NT_STATUS_OK;
case SMB2_OP_NOTIFY:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_notify_recv(req);
return NT_STATUS_OK;
case SMB2_OP_GETINFO:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_getinfo_recv(req);
return NT_STATUS_OK;
case SMB2_OP_SETINFO:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_setinfo_recv(req);
return NT_STATUS_OK;
case SMB2_OP_BREAK:
if (!req->session) goto nosession;
if (!req->tcon) goto notcon;
smb2srv_break_recv(req);
return NT_STATUS_OK;
}
DEBUG(1,("Invalid SMB2 opcode: 0x%04X\n", opcode));
smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 opcode");
return NT_STATUS_OK;
nosession:
smb2srv_send_error(req, NT_STATUS_USER_SESSION_DELETED);
return NT_STATUS_OK;
notcon:
smb2srv_send_error(req, NT_STATUS_NETWORK_NAME_DELETED);
return NT_STATUS_OK;
}
NTSTATUS smbsrv_recv_smb2_request(void *private, DATA_BLOB blob)
{
struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
struct smb2srv_request *req;
uint32_t protocol_version;
uint16_t buffer_code;
uint32_t dynamic_size;
/* see if its a special NBT packet */
if (CVAL(blob.data,0) != 0) {
DEBUG(2,("Special NBT packet on SMB2 connection"));
smbsrv_terminate_connection(smb_conn, "Special NBT packet on SMB2 connection");
return NT_STATUS_OK;
}
if (blob.length < (NBT_HDR_SIZE + SMB2_MIN_SIZE)) {
DEBUG(2,("Invalid SMB2 packet length count %ld\n", (long)blob.length));
smbsrv_terminate_connection(smb_conn, "Invalid SMB2 packet");
return NT_STATUS_OK;
}
protocol_version = IVAL(blob.data, NBT_HDR_SIZE);
if (protocol_version != SMB2_MAGIC) {
DEBUG(2,("Invalid SMB packet: protocl prefix: 0x%08X\n", protocol_version));
smbsrv_terminate_connection(smb_conn, "NON-SMB2 packet");
return NT_STATUS_OK;
}
req = smb2srv_init_request(smb_conn);
NT_STATUS_HAVE_NO_MEMORY(req);
req->in.buffer = talloc_steal(req, blob.data);
req->in.size = blob.length;
req->request_time = timeval_current();
req->in.allocated = req->in.size;
req->in.hdr = req->in.buffer+ NBT_HDR_SIZE;
req->in.body = req->in.hdr + SMB2_HDR_BODY;
req->in.body_size = req->in.size - (SMB2_HDR_BODY+NBT_HDR_SIZE);
req->in.dynamic = NULL;
buffer_code = SVAL(req->in.body, 0);
dynamic_size = req->in.body_size - (buffer_code & ~1);
if (dynamic_size != 0 && (buffer_code & 1)) {
req->in.dynamic = req->in.body + (buffer_code & ~1);
if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) {
DEBUG(1,("SMB2 request invalid dynamic size 0x%x\n",
dynamic_size));
smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER);
return NT_STATUS_OK;
}
}
/*
* TODO: - make sure the length field is 64
* - make sure it's a request
*/
return smb2srv_reply(req);
}
/*
* init the SMB2 protocol related stuff
*/
NTSTATUS smbsrv_init_smb2_connection(struct smbsrv_connection *smb_conn)
{
NTSTATUS status;
/* now initialise a few default values associated with this smb socket */
smb_conn->negotiate.max_send = 0xFFFF;
/* this is the size that w2k uses, and it appears to be important for
good performance */
smb_conn->negotiate.max_recv = lp_max_xmit();
smb_conn->negotiate.zone_offset = get_time_zone(time(NULL));
smb_conn->config.security = SEC_USER;
smb_conn->config.nt_status_support = True;
status = smbsrv_init_sessions(smb_conn, UINT64_MAX);
NT_STATUS_NOT_OK_RETURN(status);
return NT_STATUS_OK;
}
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