mirror of
https://github.com/samba-team/samba.git
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d876260d88
(This used to be commit dfb8566220
)
520 lines
14 KiB
C
520 lines
14 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 1.9.
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Inter-process communication and named pipe handling
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Copyright (C) Andrew Tridgell 1992-1998
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SMB Version handling
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Copyright (C) John H Terpstra 1995-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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This file handles the named pipe and mailslot calls
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in the SMBtrans protocol
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*/
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#include "includes.h"
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extern int max_send;
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extern fstring local_machine;
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#define NERR_notsupported 50
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extern int smb_read_error;
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/*******************************************************************
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copies parameters and data, as needed, into the smb buffer
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*both* the data and params sections should be aligned. this
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is fudged in the rpc pipes by
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at present, only the data section is. this may be a possible
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cause of some of the ipc problems being experienced. lkcl26dec97
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******************************************************************/
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static void copy_trans_params_and_data(char *outbuf, int align,
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char *rparam, int param_offset, int param_len,
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char *rdata, int data_offset, int data_len)
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{
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char *copy_into = smb_buf(outbuf)+1;
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if(param_len < 0)
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param_len = 0;
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if(data_len < 0)
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data_len = 0;
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DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d]\n",
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param_offset, param_offset + param_len,
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data_offset , data_offset + data_len));
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if (param_len)
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memcpy(copy_into, &rparam[param_offset], param_len);
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copy_into += param_len + align;
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if (data_len )
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memcpy(copy_into, &rdata[data_offset], data_len);
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}
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/****************************************************************************
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Send a trans reply.
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****************************************************************************/
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void send_trans_reply(char *outbuf,
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char *rparam, int rparam_len,
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char *rdata, int rdata_len,
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BOOL buffer_too_large)
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{
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int this_ldata,this_lparam;
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int tot_data_sent = 0;
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int tot_param_sent = 0;
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int align;
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int ldata = rdata ? rdata_len : 0;
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int lparam = rparam ? rparam_len : 0;
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if (buffer_too_large)
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DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
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this_lparam = MIN(lparam,max_send - 500); /* hack */
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this_ldata = MIN(ldata,max_send - (500+this_lparam));
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align = ((this_lparam)%4);
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if (buffer_too_large) {
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ERROR_NT(STATUS_BUFFER_OVERFLOW);
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}
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set_message(outbuf,10,1+align+this_ldata+this_lparam,True);
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copy_trans_params_and_data(outbuf, align,
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rparam, tot_param_sent, this_lparam,
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rdata, tot_data_sent, this_ldata);
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SSVAL(outbuf,smb_vwv0,lparam);
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SSVAL(outbuf,smb_vwv1,ldata);
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SSVAL(outbuf,smb_vwv3,this_lparam);
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SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
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SSVAL(outbuf,smb_vwv5,0);
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SSVAL(outbuf,smb_vwv6,this_ldata);
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SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
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SSVAL(outbuf,smb_vwv8,0);
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SSVAL(outbuf,smb_vwv9,0);
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show_msg(outbuf);
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if (!send_smb(smbd_server_fd(),outbuf))
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exit_server("send_trans_reply: send_smb failed.");
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tot_data_sent = this_ldata;
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tot_param_sent = this_lparam;
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while (tot_data_sent < ldata || tot_param_sent < lparam)
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{
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this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
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this_ldata = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
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if(this_lparam < 0)
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this_lparam = 0;
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if(this_ldata < 0)
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this_ldata = 0;
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align = (this_lparam%4);
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set_message(outbuf,10,1+this_ldata+this_lparam+align,False);
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copy_trans_params_and_data(outbuf, align,
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rparam, tot_param_sent, this_lparam,
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rdata, tot_data_sent, this_ldata);
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SSVAL(outbuf,smb_vwv3,this_lparam);
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SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
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SSVAL(outbuf,smb_vwv5,tot_param_sent);
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SSVAL(outbuf,smb_vwv6,this_ldata);
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SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
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SSVAL(outbuf,smb_vwv8,tot_data_sent);
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SSVAL(outbuf,smb_vwv9,0);
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show_msg(outbuf);
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if (!send_smb(smbd_server_fd(),outbuf))
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exit_server("send_trans_reply: send_smb failed.");
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tot_data_sent += this_ldata;
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tot_param_sent += this_lparam;
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}
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}
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/****************************************************************************
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Start the first part of an RPC reply which began with an SMBtrans request.
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****************************************************************************/
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static BOOL api_rpc_trans_reply(char *outbuf, pipes_struct *p)
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{
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char *rdata = malloc(p->max_trans_reply);
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int data_len;
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if(rdata == NULL) {
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DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
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return False;
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}
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if((data_len = read_from_pipe( p, rdata, p->max_trans_reply)) < 0) {
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SAFE_FREE(rdata);
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return False;
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}
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send_trans_reply(outbuf, NULL, 0, rdata, data_len, p->out_data.current_pdu_len > data_len);
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SAFE_FREE(rdata);
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return True;
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}
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/****************************************************************************
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WaitNamedPipeHandleState
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****************************************************************************/
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static BOOL api_WNPHS(char *outbuf, pipes_struct *p, char *param, int param_len)
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{
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uint16 priority;
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if (!param || param_len < 2)
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return False;
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priority = SVAL(param,0);
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DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
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if (wait_rpc_pipe_hnd_state(p, priority)) {
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/* now send the reply */
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send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
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return True;
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}
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return False;
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}
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/****************************************************************************
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SetNamedPipeHandleState
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****************************************************************************/
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static BOOL api_SNPHS(char *outbuf, pipes_struct *p, char *param, int param_len)
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{
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uint16 id;
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if (!param || param_len < 2)
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return False;
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id = SVAL(param,0);
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DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
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if (set_rpc_pipe_hnd_state(p, id)) {
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/* now send the reply */
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send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
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return True;
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}
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return False;
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}
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/****************************************************************************
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When no reply is generated, indicate unsupported.
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****************************************************************************/
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static BOOL api_no_reply(char *outbuf, int max_rdata_len)
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{
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char rparam[4];
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/* unsupported */
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SSVAL(rparam,0,NERR_notsupported);
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SSVAL(rparam,2,0); /* converter word */
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DEBUG(3,("Unsupported API fd command\n"));
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/* now send the reply */
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send_trans_reply(outbuf, rparam, 4, NULL, 0, False);
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return -1;
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}
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/****************************************************************************
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Handle remote api calls delivered to a named pipe already opened.
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****************************************************************************/
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static int api_fd_reply(connection_struct *conn,uint16 vuid,char *outbuf,
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uint16 *setup,char *data,char *params,
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int suwcnt,int tdscnt,int tpscnt,int mdrcnt,int mprcnt)
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{
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BOOL reply = False;
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pipes_struct *p = NULL;
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int pnum;
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int subcommand;
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DEBUG(5,("api_fd_reply\n"));
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/* First find out the name of this file. */
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if (suwcnt != 2) {
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DEBUG(0,("Unexpected named pipe transaction.\n"));
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return(-1);
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}
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/* Get the file handle and hence the file name. */
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/*
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* NB. The setup array has already been transformed
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* via SVAL and so is in gost byte order.
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*/
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pnum = ((int)setup[1]) & 0xFFFF;
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subcommand = ((int)setup[0]) & 0xFFFF;
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if(!(p = get_rpc_pipe(pnum))) {
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DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
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return api_no_reply(outbuf, mdrcnt);
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}
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DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)", subcommand, p->name, pnum));
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/* record maximum data length that can be transmitted in an SMBtrans */
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p->max_trans_reply = mdrcnt;
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DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
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switch (subcommand) {
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case 0x26:
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/* dce/rpc command */
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reply = write_to_pipe(p, data, tdscnt);
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if (reply)
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reply = api_rpc_trans_reply(outbuf, p);
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break;
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case 0x53:
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/* Wait Named Pipe Handle state */
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reply = api_WNPHS(outbuf, p, params, tpscnt);
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break;
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case 0x01:
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/* Set Named Pipe Handle state */
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reply = api_SNPHS(outbuf, p, params, tpscnt);
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break;
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}
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if (!reply)
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return api_no_reply(outbuf, mdrcnt);
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return -1;
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}
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/****************************************************************************
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handle named pipe commands
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****************************************************************************/
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static int named_pipe(connection_struct *conn,uint16 vuid, char *outbuf,char *name,
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uint16 *setup,char *data,char *params,
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int suwcnt,int tdscnt,int tpscnt,
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int msrcnt,int mdrcnt,int mprcnt)
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{
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DEBUG(3,("named pipe command on <%s> name\n", name));
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if (strequal(name,"LANMAN"))
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return api_reply(conn,vuid,outbuf,data,params,tdscnt,tpscnt,mdrcnt,mprcnt);
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if (strequal(name,"WKSSVC") ||
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strequal(name,"SRVSVC") ||
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strequal(name,"WINREG") ||
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strequal(name,"SAMR") ||
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strequal(name,"LSARPC"))
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{
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DEBUG(4,("named pipe command from Win95 (wow!)\n"));
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return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
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}
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if (strlen(name) < 1)
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return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
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if (setup)
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DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
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return 0;
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}
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/****************************************************************************
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Reply to a SMBtrans.
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****************************************************************************/
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int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int bufsize)
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{
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fstring name;
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int name_offset = 0;
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char *data=NULL,*params=NULL;
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uint16 *setup=NULL;
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int outsize = 0;
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uint16 vuid = SVAL(inbuf,smb_uid);
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int tpscnt = SVAL(inbuf,smb_vwv0);
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int tdscnt = SVAL(inbuf,smb_vwv1);
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int mprcnt = SVAL(inbuf,smb_vwv2);
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int mdrcnt = SVAL(inbuf,smb_vwv3);
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int msrcnt = CVAL(inbuf,smb_vwv4);
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BOOL close_on_completion = BITSETW(inbuf+smb_vwv5,0);
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BOOL one_way = BITSETW(inbuf+smb_vwv5,1);
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int pscnt = SVAL(inbuf,smb_vwv9);
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int psoff = SVAL(inbuf,smb_vwv10);
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int dscnt = SVAL(inbuf,smb_vwv11);
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int dsoff = SVAL(inbuf,smb_vwv12);
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int suwcnt = CVAL(inbuf,smb_vwv13);
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START_PROFILE(SMBtrans);
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memset(name, '\0',sizeof(name));
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srvstr_pull(inbuf, name, smb_buf(inbuf), sizeof(name), -1, STR_TERMINATE);
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if (dscnt > tdscnt || pscnt > tpscnt) {
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exit_server("invalid trans parameters");
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}
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if (tdscnt) {
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if((data = (char *)malloc(tdscnt)) == NULL) {
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DEBUG(0,("reply_trans: data malloc fail for %d bytes !\n", tdscnt));
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END_PROFILE(SMBtrans);
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return(ERROR_DOS(ERRDOS,ERRnomem));
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}
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memcpy(data,smb_base(inbuf)+dsoff,dscnt);
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}
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if (tpscnt) {
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if((params = (char *)malloc(tpscnt)) == NULL) {
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DEBUG(0,("reply_trans: param malloc fail for %d bytes !\n", tpscnt));
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END_PROFILE(SMBtrans);
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return(ERROR_DOS(ERRDOS,ERRnomem));
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}
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memcpy(params,smb_base(inbuf)+psoff,pscnt);
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}
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if (suwcnt) {
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int i;
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if((setup = (uint16 *)malloc(suwcnt*sizeof(uint16))) == NULL) {
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DEBUG(0,("reply_trans: setup malloc fail for %d bytes !\n", (int)(suwcnt * sizeof(uint16))));
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END_PROFILE(SMBtrans);
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return(ERROR_DOS(ERRDOS,ERRnomem));
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}
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for (i=0;i<suwcnt;i++)
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setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
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}
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if (pscnt < tpscnt || dscnt < tdscnt) {
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/* We need to send an interim response then receive the rest
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of the parameter/data bytes */
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outsize = set_message(outbuf,0,0,True);
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show_msg(outbuf);
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if (!send_smb(smbd_server_fd(),outbuf))
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exit_server("reply_trans: send_smb failed.");
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}
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/* receive the rest of the trans packet */
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while (pscnt < tpscnt || dscnt < tdscnt) {
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BOOL ret;
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int pcnt,poff,dcnt,doff,pdisp,ddisp;
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ret = receive_next_smb(inbuf,bufsize,SMB_SECONDARY_WAIT);
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if ((ret && (CVAL(inbuf, smb_com) != SMBtranss)) || !ret) {
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if(ret) {
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DEBUG(0,("reply_trans: Invalid secondary trans packet\n"));
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} else {
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DEBUG(0,("reply_trans: %s in getting secondary trans response.\n",
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(smb_read_error == READ_ERROR) ? "error" : "timeout" ));
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}
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SAFE_FREE(params);
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SAFE_FREE(data);
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SAFE_FREE(setup);
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END_PROFILE(SMBtrans);
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return(ERROR_DOS(ERRSRV,ERRerror));
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}
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show_msg(inbuf);
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tpscnt = SVAL(inbuf,smb_vwv0);
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tdscnt = SVAL(inbuf,smb_vwv1);
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pcnt = SVAL(inbuf,smb_vwv2);
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poff = SVAL(inbuf,smb_vwv3);
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pdisp = SVAL(inbuf,smb_vwv4);
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dcnt = SVAL(inbuf,smb_vwv5);
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doff = SVAL(inbuf,smb_vwv6);
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ddisp = SVAL(inbuf,smb_vwv7);
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pscnt += pcnt;
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dscnt += dcnt;
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if (dscnt > tdscnt || pscnt > tpscnt) {
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exit_server("invalid trans parameters");
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}
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if (pcnt)
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memcpy(params+pdisp,smb_base(inbuf)+poff,pcnt);
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if (dcnt)
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memcpy(data+ddisp,smb_base(inbuf)+doff,dcnt);
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}
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DEBUG(3,("trans <%s> data=%d params=%d setup=%d\n",
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name,tdscnt,tpscnt,suwcnt));
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/*
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* WinCE wierdness....
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*/
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if (name[0] == '\\' && (StrnCaseCmp(&name[1],local_machine, strlen(local_machine)) == 0) &&
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(name[strlen(local_machine)+1] == '\\'))
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name_offset = strlen(local_machine)+1;
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if (strnequal(&name[name_offset], "\\PIPE", strlen("\\PIPE"))) {
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name_offset += strlen("\\PIPE");
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/* Win9x weirdness. When talking to a unicode server Win9x
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only sends \PIPE instead of \PIPE\ */
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if (name[name_offset] == '\\')
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name_offset++;
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DEBUG(5,("calling named_pipe\n"));
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|
outsize = named_pipe(conn,vuid,outbuf,
|
|
name+name_offset,setup,data,params,
|
|
suwcnt,tdscnt,tpscnt,msrcnt,mdrcnt,mprcnt);
|
|
} else {
|
|
DEBUG(3,("invalid pipe name\n"));
|
|
outsize = 0;
|
|
}
|
|
|
|
|
|
SAFE_FREE(data);
|
|
SAFE_FREE(params);
|
|
SAFE_FREE(setup);
|
|
|
|
if (close_on_completion)
|
|
close_cnum(conn,vuid);
|
|
|
|
if (one_way) {
|
|
END_PROFILE(SMBtrans);
|
|
return(-1);
|
|
}
|
|
|
|
if (outsize == 0) {
|
|
END_PROFILE(SMBtrans);
|
|
return(ERROR_DOS(ERRSRV,ERRnosupport));
|
|
}
|
|
|
|
END_PROFILE(SMBtrans);
|
|
return(outsize);
|
|
}
|