/*
Unix SMB/CIFS implementation.
Inter-process communication and named pipe handling
Copyright (C) Andrew Tridgell 1992-1998
SMB Version handling
Copyright (C) John H Terpstra 1995-1998
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 .
*/
/*
This file handles the named pipe and mailslot calls
in the SMBtrans protocol
*/
#include "includes.h"
extern int max_send;
#define NERR_notsupported 50
static void api_no_reply(connection_struct *conn, struct smb_request *req);
/*******************************************************************
copies parameters and data, as needed, into the smb buffer
*both* the data and params sections should be aligned. this
is fudged in the rpc pipes by
at present, only the data section is. this may be a possible
cause of some of the ipc problems being experienced. lkcl26dec97
******************************************************************/
static void copy_trans_params_and_data(char *outbuf, int align,
char *rparam, int param_offset, int param_len,
char *rdata, int data_offset, int data_len)
{
char *copy_into = smb_buf(outbuf);
if(param_len < 0)
param_len = 0;
if(data_len < 0)
data_len = 0;
DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
param_offset, param_offset + param_len,
data_offset , data_offset + data_len,
align));
*copy_into = '\0';
copy_into += 1;
if (param_len)
memcpy(copy_into, &rparam[param_offset], param_len);
copy_into += param_len;
if (align) {
memset(copy_into, '\0', align);
}
copy_into += align;
if (data_len )
memcpy(copy_into, &rdata[data_offset], data_len);
}
/****************************************************************************
Send a trans reply.
****************************************************************************/
void send_trans_reply(connection_struct *conn,
struct smb_request *req,
char *rparam, int rparam_len,
char *rdata, int rdata_len,
bool buffer_too_large)
{
int this_ldata,this_lparam;
int tot_data_sent = 0;
int tot_param_sent = 0;
int align;
int ldata = rdata ? rdata_len : 0;
int lparam = rparam ? rparam_len : 0;
if (buffer_too_large)
DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
this_lparam = MIN(lparam,max_send - 500); /* hack */
this_ldata = MIN(ldata,max_send - (500+this_lparam));
align = ((this_lparam)%4);
reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
copy_trans_params_and_data((char *)req->outbuf, align,
rparam, tot_param_sent, this_lparam,
rdata, tot_data_sent, this_ldata);
SSVAL(req->outbuf,smb_vwv0,lparam);
SSVAL(req->outbuf,smb_vwv1,ldata);
SSVAL(req->outbuf,smb_vwv3,this_lparam);
SSVAL(req->outbuf,smb_vwv4,
smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
SSVAL(req->outbuf,smb_vwv5,0);
SSVAL(req->outbuf,smb_vwv6,this_ldata);
SSVAL(req->outbuf,smb_vwv7,
smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
req->outbuf));
SSVAL(req->outbuf,smb_vwv8,0);
SSVAL(req->outbuf,smb_vwv9,0);
if (buffer_too_large) {
error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
}
show_msg((char *)req->outbuf);
if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
IS_CONN_ENCRYPTED(conn))) {
exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
}
TALLOC_FREE(req->outbuf);
tot_data_sent = this_ldata;
tot_param_sent = this_lparam;
while (tot_data_sent < ldata || tot_param_sent < lparam)
{
this_lparam = MIN(lparam-tot_param_sent,
max_send - 500); /* hack */
this_ldata = MIN(ldata -tot_data_sent,
max_send - (500+this_lparam));
if(this_lparam < 0)
this_lparam = 0;
if(this_ldata < 0)
this_ldata = 0;
align = (this_lparam%4);
reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
copy_trans_params_and_data((char *)req->outbuf, align,
rparam, tot_param_sent, this_lparam,
rdata, tot_data_sent, this_ldata);
SSVAL(req->outbuf,smb_vwv3,this_lparam);
SSVAL(req->outbuf,smb_vwv4,
smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
SSVAL(req->outbuf,smb_vwv6,this_ldata);
SSVAL(req->outbuf,smb_vwv7,
smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
req->outbuf));
SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
SSVAL(req->outbuf,smb_vwv9,0);
if (buffer_too_large) {
error_packet_set((char *)req->outbuf,
ERRDOS, ERRmoredata,
STATUS_BUFFER_OVERFLOW,
__LINE__, __FILE__);
}
show_msg((char *)req->outbuf);
if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
IS_CONN_ENCRYPTED(conn)))
exit_server_cleanly("send_trans_reply: srv_send_smb "
"failed.");
tot_data_sent += this_ldata;
tot_param_sent += this_lparam;
TALLOC_FREE(req->outbuf);
}
}
/****************************************************************************
Start the first part of an RPC reply which began with an SMBtrans request.
****************************************************************************/
static void api_rpc_trans_reply(connection_struct *conn,
struct smb_request *req,
files_struct *fsp,
int max_trans_reply)
{
bool is_data_outstanding;
uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
ssize_t data_len;
NTSTATUS status;
if(rdata == NULL) {
DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
reply_nterror(req, NT_STATUS_NO_MEMORY);
return;
}
status = np_read(fsp, rdata, max_trans_reply, &data_len,
&is_data_outstanding);
if (!NT_STATUS_IS_OK(status)) {
SAFE_FREE(rdata);
api_no_reply(conn,req);
return;
}
send_trans_reply(conn, req, NULL, 0, (char *)rdata, data_len,
is_data_outstanding);
SAFE_FREE(rdata);
return;
}
/****************************************************************************
WaitNamedPipeHandleState
****************************************************************************/
static void api_WNPHS(connection_struct *conn, struct smb_request *req,
struct files_struct *fsp, char *param, int param_len)
{
if (!param || param_len < 2) {
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
return;
}
DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
(int)SVAL(param,0)));
send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
}
/****************************************************************************
SetNamedPipeHandleState
****************************************************************************/
static void api_SNPHS(connection_struct *conn, struct smb_request *req,
struct files_struct *fsp, char *param, int param_len)
{
if (!param || param_len < 2) {
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
return;
}
DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
}
/****************************************************************************
When no reply is generated, indicate unsupported.
****************************************************************************/
static void api_no_reply(connection_struct *conn, struct smb_request *req)
{
char rparam[4];
/* unsupported */
SSVAL(rparam,0,NERR_notsupported);
SSVAL(rparam,2,0); /* converter word */
DEBUG(3,("Unsupported API fd command\n"));
/* now send the reply */
send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
return;
}
/****************************************************************************
Handle remote api calls delivered to a named pipe already opened.
****************************************************************************/
static void api_fd_reply(connection_struct *conn, uint16 vuid,
struct smb_request *req,
uint16 *setup, uint8_t *data, char *params,
int suwcnt, int tdscnt, int tpscnt,
int mdrcnt, int mprcnt)
{
struct files_struct *fsp;
int pnum;
int subcommand;
NTSTATUS status;
DEBUG(5,("api_fd_reply\n"));
/* First find out the name of this file. */
if (suwcnt != 2) {
DEBUG(0,("Unexpected named pipe transaction.\n"));
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
return;
}
/* Get the file handle and hence the file name. */
/*
* NB. The setup array has already been transformed
* via SVAL and so is in host byte order.
*/
pnum = ((int)setup[1]) & 0xFFFF;
subcommand = ((int)setup[0]) & 0xFFFF;
fsp = file_fsp(req, pnum);
if (!fsp_is_np(fsp)) {
if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
/* Win9x does this call with a unicode pipe name, not a pnum. */
/* Just return success for now... */
DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
return;
}
DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
return;
}
if (vuid != fsp->vuid) {
DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
"expected %d\n", pnum, vuid, fsp->vuid));
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
return;
}
DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
subcommand, fsp->fsp_name, pnum));
DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
switch (subcommand) {
case TRANSACT_DCERPCCMD: {
/* dce/rpc command */
ssize_t nwritten;
status = np_write(fsp, data, tdscnt, &nwritten);
if (!NT_STATUS_IS_OK(status)) {
api_no_reply(conn, req);
return;
}
api_rpc_trans_reply(conn, req, fsp, mdrcnt);
break;
}
case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
/* Wait Named Pipe Handle state */
api_WNPHS(conn, req, fsp, params, tpscnt);
break;
case TRANSACT_SETNAMEDPIPEHANDLESTATE:
/* Set Named Pipe Handle state */
api_SNPHS(conn, req, fsp, params, tpscnt);
break;
default:
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
return;
}
}
/****************************************************************************
Handle named pipe commands.
****************************************************************************/
static void named_pipe(connection_struct *conn, uint16 vuid,
struct smb_request *req,
const char *name, uint16 *setup,
char *data, char *params,
int suwcnt, int tdscnt,int tpscnt,
int msrcnt, int mdrcnt, int mprcnt)
{
DEBUG(3,("named pipe command on <%s> name\n", name));
if (strequal(name,"LANMAN")) {
api_reply(conn, vuid, req,
data, params,
tdscnt, tpscnt,
mdrcnt, mprcnt);
return;
}
if (strequal(name,"WKSSVC") ||
strequal(name,"SRVSVC") ||
strequal(name,"WINREG") ||
strequal(name,"SAMR") ||
strequal(name,"LSARPC")) {
DEBUG(4,("named pipe command from Win95 (wow!)\n"));
api_fd_reply(conn, vuid, req,
setup, (uint8_t *)data, params,
suwcnt, tdscnt, tpscnt,
mdrcnt, mprcnt);
return;
}
if (strlen(name) < 1) {
api_fd_reply(conn, vuid, req,
setup, (uint8_t *)data,
params, suwcnt, tdscnt,
tpscnt, mdrcnt, mprcnt);
return;
}
if (setup)
DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
(int)setup[0],(int)setup[1]));
reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
return;
}
static void handle_trans(connection_struct *conn, struct smb_request *req,
struct trans_state *state)
{
char *local_machine_name;
int name_offset = 0;
DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
(unsigned int)state->setup_count));
/*
* WinCE wierdness....
*/
local_machine_name = talloc_asprintf(state, "\\%s\\",
get_local_machine_name());
if (local_machine_name == NULL) {
reply_nterror(req, NT_STATUS_NO_MEMORY);
return;
}
if (strnequal(state->name, local_machine_name,
strlen(local_machine_name))) {
name_offset = strlen(local_machine_name)-1;
}
if (!strnequal(&state->name[name_offset], "\\PIPE",
strlen("\\PIPE"))) {
reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
return;
}
name_offset += strlen("\\PIPE");
/* Win9x weirdness. When talking to a unicode server Win9x
only sends \PIPE instead of \PIPE\ */
if (state->name[name_offset] == '\\')
name_offset++;
DEBUG(5,("calling named_pipe\n"));
named_pipe(conn, state->vuid, req,
state->name+name_offset,
state->setup,state->data,
state->param,
state->setup_count,state->total_data,
state->total_param,
state->max_setup_return,
state->max_data_return,
state->max_param_return);
if (state->close_on_completion) {
close_cnum(conn,state->vuid);
req->conn = NULL;
}
return;
}
/****************************************************************************
Reply to a SMBtrans.
****************************************************************************/
void reply_trans(struct smb_request *req)
{
connection_struct *conn = req->conn;
unsigned int dsoff;
unsigned int dscnt;
unsigned int psoff;
unsigned int pscnt;
struct trans_state *state;
NTSTATUS result;
unsigned int size;
unsigned int av_size;
START_PROFILE(SMBtrans);
if (req->wct < 14) {
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
END_PROFILE(SMBtrans);
return;
}
size = smb_len(req->inbuf) + 4;
av_size = smb_len(req->inbuf);
dsoff = SVAL(req->vwv+12, 0);
dscnt = SVAL(req->vwv+11, 0);
psoff = SVAL(req->vwv+10, 0);
pscnt = SVAL(req->vwv+9, 0);
result = allow_new_trans(conn->pending_trans, req->mid);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(2, ("Got invalid trans request: %s\n",
nt_errstr(result)));
reply_nterror(req, result);
END_PROFILE(SMBtrans);
return;
}
if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
DEBUG(0, ("talloc failed\n"));
reply_nterror(req, NT_STATUS_NO_MEMORY);
END_PROFILE(SMBtrans);
return;
}
state->cmd = SMBtrans;
state->mid = req->mid;
state->vuid = req->vuid;
state->setup_count = CVAL(req->vwv+13, 0);
state->setup = NULL;
state->total_param = SVAL(req->vwv+0, 0);
state->param = NULL;
state->total_data = SVAL(req->vwv+1, 0);
state->data = NULL;
state->max_param_return = SVAL(req->vwv+2, 0);
state->max_data_return = SVAL(req->vwv+3, 0);
state->max_setup_return = CVAL(req->vwv+4, 0);
state->close_on_completion = BITSETW(req->vwv+5, 0);
state->one_way = BITSETW(req->vwv+5, 1);
srvstr_pull_req_talloc(state, req, &state->name, req->buf,
STR_TERMINATE);
if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
!state->name)
goto bad_param;
if (state->total_data) {
/* Can't use talloc here, the core routines do realloc on the
* params and data. Out of paranoia, 100 bytes too many. */
state->data = (char *)SMB_MALLOC(state->total_data+100);
if (state->data == NULL) {
DEBUG(0,("reply_trans: data malloc fail for %u "
"bytes !\n", (unsigned int)state->total_data));
TALLOC_FREE(state);
reply_nterror(req, NT_STATUS_NO_MEMORY);
END_PROFILE(SMBtrans);
return;
}
/* null-terminate the slack space */
memset(&state->data[state->total_data], 0, 100);
if (dscnt > state->total_data ||
dsoff+dscnt < dsoff) {
goto bad_param;
}
if (dsoff > av_size ||
dscnt > av_size ||
dsoff+dscnt > av_size) {
goto bad_param;
}
memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
}
if (state->total_param) {
/* Can't use talloc here, the core routines do realloc on the
* params and data. Out of paranoia, 100 bytes too many */
state->param = (char *)SMB_MALLOC(state->total_param+100);
if (state->param == NULL) {
DEBUG(0,("reply_trans: param malloc fail for %u "
"bytes !\n", (unsigned int)state->total_param));
SAFE_FREE(state->data);
TALLOC_FREE(state);
reply_nterror(req, NT_STATUS_NO_MEMORY);
END_PROFILE(SMBtrans);
return;
}
/* null-terminate the slack space */
memset(&state->param[state->total_param], 0, 100);
if (pscnt > state->total_param ||
psoff+pscnt < psoff) {
goto bad_param;
}
if (psoff > av_size ||
pscnt > av_size ||
psoff+pscnt > av_size) {
goto bad_param;
}
memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
}
state->received_data = dscnt;
state->received_param = pscnt;
if (state->setup_count) {
unsigned int i;
if((state->setup = TALLOC_ARRAY(
state, uint16, state->setup_count)) == NULL) {
DEBUG(0,("reply_trans: setup malloc fail for %u "
"bytes !\n", (unsigned int)
(state->setup_count * sizeof(uint16))));
SAFE_FREE(state->data);
SAFE_FREE(state->param);
TALLOC_FREE(state);
reply_nterror(req, NT_STATUS_NO_MEMORY);
END_PROFILE(SMBtrans);
return;
}
if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
req->inbuf + size)
goto bad_param;
if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
(smb_vwv14+(state->setup_count*SIZEOFWORD) <
(state->setup_count*SIZEOFWORD)))
goto bad_param;
for (i=0;isetup_count;i++)
state->setup[i] = SVAL(req->inbuf,
smb_vwv14+i*SIZEOFWORD);
}
state->received_param = pscnt;
if ((state->received_param != state->total_param) ||
(state->received_data != state->total_data)) {
DLIST_ADD(conn->pending_trans, state);
/* We need to send an interim response then receive the rest
of the parameter/data bytes */
reply_outbuf(req, 0, 0);
show_msg((char *)req->outbuf);
END_PROFILE(SMBtrans);
return;
}
handle_trans(conn, req, state);
SAFE_FREE(state->data);
SAFE_FREE(state->param);
TALLOC_FREE(state);
END_PROFILE(SMBtrans);
return;
bad_param:
DEBUG(0,("reply_trans: invalid trans parameters\n"));
SAFE_FREE(state->data);
SAFE_FREE(state->param);
TALLOC_FREE(state);
END_PROFILE(SMBtrans);
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
return;
}
/****************************************************************************
Reply to a secondary SMBtrans.
****************************************************************************/
void reply_transs(struct smb_request *req)
{
connection_struct *conn = req->conn;
unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
struct trans_state *state;
unsigned int av_size;
START_PROFILE(SMBtranss);
show_msg((char *)req->inbuf);
if (req->wct < 8) {
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
END_PROFILE(SMBtranss);
return;
}
for (state = conn->pending_trans; state != NULL;
state = state->next) {
if (state->mid == req->mid) {
break;
}
}
if ((state == NULL) || (state->cmd != SMBtrans)) {
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
END_PROFILE(SMBtranss);
return;
}
/* Revise total_params and total_data in case they have changed
* downwards */
if (SVAL(req->vwv+0, 0) < state->total_param)
state->total_param = SVAL(req->vwv+0, 0);
if (SVAL(req->vwv+1, 0) < state->total_data)
state->total_data = SVAL(req->vwv+1, 0);
av_size = smb_len(req->inbuf);
pcnt = SVAL(req->vwv+2, 0);
poff = SVAL(req->vwv+3, 0);
pdisp = SVAL(req->vwv+4, 0);
dcnt = SVAL(req->vwv+5, 0);
doff = SVAL(req->vwv+6, 0);
ddisp = SVAL(req->vwv+7, 0);
state->received_param += pcnt;
state->received_data += dcnt;
if ((state->received_data > state->total_data) ||
(state->received_param > state->total_param))
goto bad_param;
if (pcnt) {
if (pdisp > state->total_param ||
pcnt > state->total_param ||
pdisp+pcnt > state->total_param ||
pdisp+pcnt < pdisp) {
goto bad_param;
}
if (poff > av_size ||
pcnt > av_size ||
poff+pcnt > av_size ||
poff+pcnt < poff) {
goto bad_param;
}
memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
pcnt);
}
if (dcnt) {
if (ddisp > state->total_data ||
dcnt > state->total_data ||
ddisp+dcnt > state->total_data ||
ddisp+dcnt < ddisp) {
goto bad_param;
}
if (ddisp > av_size ||
dcnt > av_size ||
ddisp+dcnt > av_size ||
ddisp+dcnt < ddisp) {
goto bad_param;
}
memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
dcnt);
}
if ((state->received_param < state->total_param) ||
(state->received_data < state->total_data)) {
END_PROFILE(SMBtranss);
return;
}
/*
* construct_reply_common will copy smb_com from inbuf to
* outbuf. SMBtranss is wrong here.
*/
SCVAL(req->inbuf,smb_com,SMBtrans);
handle_trans(conn, req, state);
DLIST_REMOVE(conn->pending_trans, state);
SAFE_FREE(state->data);
SAFE_FREE(state->param);
TALLOC_FREE(state);
END_PROFILE(SMBtranss);
return;
bad_param:
DEBUG(0,("reply_transs: invalid trans parameters\n"));
DLIST_REMOVE(conn->pending_trans, state);
SAFE_FREE(state->data);
SAFE_FREE(state->param);
TALLOC_FREE(state);
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
END_PROFILE(SMBtranss);
return;
}