--- /dev/null
+/*
+ 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 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.
+ */
+/*
+ This file handles the named pipe and mailslot calls
+ in the SMBtrans protocol
+ */
+
+#include "includes.h"
+
+extern int max_send;
+
+#define NERR_notsupported 50
+
+extern int smb_read_error;
+
+/*******************************************************************
+ 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)+1;
+
+ 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]\n",
+ param_offset, param_offset + param_len,
+ data_offset , data_offset + data_len));
+
+ if (param_len)
+ memcpy(copy_into, &rparam[param_offset], param_len);
+
+ copy_into += param_len + align;
+
+ if (data_len )
+ memcpy(copy_into, &rdata[data_offset], data_len);
+}
+
+/****************************************************************************
+ Send a trans reply.
+ ****************************************************************************/
+
+void send_trans_reply(char *outbuf,
+ 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);
+
+ if (buffer_too_large) {
+ ERROR_BOTH(STATUS_BUFFER_OVERFLOW,ERRDOS,ERRmoredata);
+ }
+
+ set_message(outbuf,10,1+align+this_ldata+this_lparam,True);
+
+ copy_trans_params_and_data(outbuf, align,
+ rparam, tot_param_sent, this_lparam,
+ rdata, tot_data_sent, this_ldata);
+
+ SSVAL(outbuf,smb_vwv0,lparam);
+ SSVAL(outbuf,smb_vwv1,ldata);
+ SSVAL(outbuf,smb_vwv3,this_lparam);
+ SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
+ SSVAL(outbuf,smb_vwv5,0);
+ SSVAL(outbuf,smb_vwv6,this_ldata);
+ SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
+ SSVAL(outbuf,smb_vwv8,0);
+ SSVAL(outbuf,smb_vwv9,0);
+
+ show_msg(outbuf);
+ if (!send_smb(smbd_server_fd(),outbuf))
+ exit_server("send_trans_reply: send_smb failed.");
+
+ 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);
+
+ set_message(outbuf,10,1+this_ldata+this_lparam+align,False);
+
+ copy_trans_params_and_data(outbuf, align,
+ rparam, tot_param_sent, this_lparam,
+ rdata, tot_data_sent, this_ldata);
+
+ SSVAL(outbuf,smb_vwv3,this_lparam);
+ SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
+ SSVAL(outbuf,smb_vwv5,tot_param_sent);
+ SSVAL(outbuf,smb_vwv6,this_ldata);
+ SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
+ SSVAL(outbuf,smb_vwv8,tot_data_sent);
+ SSVAL(outbuf,smb_vwv9,0);
+
+ show_msg(outbuf);
+ if (!send_smb(smbd_server_fd(),outbuf))
+ exit_server("send_trans_reply: send_smb failed.");
+
+ tot_data_sent += this_ldata;
+ tot_param_sent += this_lparam;
+ }
+}
+
+/****************************************************************************
+ Start the first part of an RPC reply which began with an SMBtrans request.
+****************************************************************************/
+
+static BOOL api_rpc_trans_reply(char *outbuf, smb_np_struct *p)
+{
+ BOOL is_data_outstanding;
+ char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
+ int data_len;
+
+ if(rdata == NULL) {
+ DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
+ return False;
+ }
+
+ if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
+ &is_data_outstanding)) < 0) {
+ SAFE_FREE(rdata);
+ return False;
+ }
+
+ send_trans_reply(outbuf, NULL, 0, rdata, data_len, is_data_outstanding);
+
+ SAFE_FREE(rdata);
+ return True;
+}
+
+/****************************************************************************
+ WaitNamedPipeHandleState
+****************************************************************************/
+
+static BOOL api_WNPHS(char *outbuf, smb_np_struct *p, char *param, int param_len)
+{
+ uint16 priority;
+
+ if (!param || param_len < 2)
+ return False;
+
+ priority = SVAL(param,0);
+ DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
+
+ if (wait_rpc_pipe_hnd_state(p, priority)) {
+ /* now send the reply */
+ send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
+ return True;
+ }
+ return False;
+}
+
+
+/****************************************************************************
+ SetNamedPipeHandleState
+****************************************************************************/
+
+static BOOL api_SNPHS(char *outbuf, smb_np_struct *p, char *param, int param_len)
+{
+ uint16 id;
+
+ if (!param || param_len < 2)
+ return False;
+
+ id = SVAL(param,0);
+ DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
+
+ if (set_rpc_pipe_hnd_state(p, id)) {
+ /* now send the reply */
+ send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
+ return True;
+ }
+ return False;
+}
+
+
+/****************************************************************************
+ When no reply is generated, indicate unsupported.
+ ****************************************************************************/
+
+static BOOL api_no_reply(char *outbuf, int max_rdata_len)
+{
+ 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(outbuf, rparam, 4, NULL, 0, False);
+
+ return -1;
+}
+
+/****************************************************************************
+ Handle remote api calls delivered to a named pipe already opened.
+ ****************************************************************************/
+
+static int api_fd_reply(connection_struct *conn,uint16 vuid,char *outbuf,
+ uint16 *setup,char *data,char *params,
+ int suwcnt,int tdscnt,int tpscnt,int mdrcnt,int mprcnt)
+{
+ BOOL reply = False;
+ smb_np_struct *p = NULL;
+ int pnum;
+ int subcommand;
+
+ DEBUG(5,("api_fd_reply\n"));
+
+ /* First find out the name of this file. */
+ if (suwcnt != 2) {
+ DEBUG(0,("Unexpected named pipe transaction.\n"));
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+ }
+
+ /* Get the file handle and hence the file name. */
+ /*
+ * NB. The setup array has already been transformed
+ * via SVAL and so is in gost byte order.
+ */
+ pnum = ((int)setup[1]) & 0xFFFF;
+ subcommand = ((int)setup[0]) & 0xFFFF;
+
+ if(!(p = get_rpc_pipe(pnum))) {
+ 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(outbuf, NULL, 0, NULL, 0, False);
+ return -1;
+ }
+
+ DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
+ return ERROR_NT(NT_STATUS_INVALID_HANDLE);
+ }
+
+ DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
+
+ /* record maximum data length that can be transmitted in an SMBtrans */
+ p->max_trans_reply = mdrcnt;
+
+ DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
+
+ switch (subcommand) {
+ case TRANSACT_DCERPCCMD:
+ /* dce/rpc command */
+ reply = write_to_pipe(p, data, tdscnt);
+ if (reply)
+ reply = api_rpc_trans_reply(outbuf, p);
+ break;
+ case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
+ /* Wait Named Pipe Handle state */
+ reply = api_WNPHS(outbuf, p, params, tpscnt);
+ break;
+ case TRANSACT_SETNAMEDPIPEHANDLESTATE:
+ /* Set Named Pipe Handle state */
+ reply = api_SNPHS(outbuf, p, params, tpscnt);
+ break;
+ default:
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+ }
+
+ if (!reply)
+ return api_no_reply(outbuf, mdrcnt);
+
+ return -1;
+}
+
+/****************************************************************************
+ handle named pipe commands
+ ****************************************************************************/
+static int named_pipe(connection_struct *conn,uint16 vuid, char *outbuf,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"))
+ return api_reply(conn,vuid,outbuf,data,params,tdscnt,tpscnt,mdrcnt,mprcnt);
+
+ 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"));
+ return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
+ }
+
+ if (strlen(name) < 1)
+ return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
+
+ if (setup)
+ DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
+
+ return 0;
+}
+
+
+/****************************************************************************
+ Reply to a SMBtrans.
+ ****************************************************************************/
+
+int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int bufsize)
+{
+ fstring name;
+ int name_offset = 0;
+ char *data=NULL,*params=NULL;
+ uint16 *setup=NULL;
+ int outsize = 0;
+ uint16 vuid = SVAL(inbuf,smb_uid);
+ unsigned int tpscnt = SVAL(inbuf,smb_vwv0);
+ unsigned int tdscnt = SVAL(inbuf,smb_vwv1);
+ unsigned int mprcnt = SVAL(inbuf,smb_vwv2);
+ unsigned int mdrcnt = SVAL(inbuf,smb_vwv3);
+ unsigned int msrcnt = CVAL(inbuf,smb_vwv4);
+ BOOL close_on_completion = BITSETW(inbuf+smb_vwv5,0);
+ BOOL one_way = BITSETW(inbuf+smb_vwv5,1);
+ unsigned int pscnt = SVAL(inbuf,smb_vwv9);
+ unsigned int psoff = SVAL(inbuf,smb_vwv10);
+ unsigned int dscnt = SVAL(inbuf,smb_vwv11);
+ unsigned int dsoff = SVAL(inbuf,smb_vwv12);
+ unsigned int suwcnt = CVAL(inbuf,smb_vwv13);
+ fstring local_machine_name;
+ START_PROFILE(SMBtrans);
+
+ memset(name, '\0',sizeof(name));
+ srvstr_pull_buf(inbuf, name, smb_buf(inbuf), sizeof(name), STR_TERMINATE);
+
+ if (dscnt > tdscnt || pscnt > tpscnt)
+ goto bad_param;
+
+ if (tdscnt) {
+ if((data = (char *)SMB_MALLOC(tdscnt)) == NULL) {
+ DEBUG(0,("reply_trans: data malloc fail for %u bytes !\n", tdscnt));
+ END_PROFILE(SMBtrans);
+ return(ERROR_DOS(ERRDOS,ERRnomem));
+ }
+ if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
+ goto bad_param;
+ if ((smb_base(inbuf)+dsoff+dscnt > inbuf + size) ||
+ (smb_base(inbuf)+dsoff+dscnt < smb_base(inbuf)))
+ goto bad_param;
+
+ memcpy(data,smb_base(inbuf)+dsoff,dscnt);
+ }
+
+ if (tpscnt) {
+ if((params = (char *)SMB_MALLOC(tpscnt)) == NULL) {
+ DEBUG(0,("reply_trans: param malloc fail for %u bytes !\n", tpscnt));
+ SAFE_FREE(data);
+ END_PROFILE(SMBtrans);
+ return(ERROR_DOS(ERRDOS,ERRnomem));
+ }
+ if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
+ goto bad_param;
+ if ((smb_base(inbuf)+psoff+pscnt > inbuf + size) ||
+ (smb_base(inbuf)+psoff+pscnt < smb_base(inbuf)))
+ goto bad_param;
+
+ memcpy(params,smb_base(inbuf)+psoff,pscnt);
+ }
+
+ if (suwcnt) {
+ unsigned int i;
+ if((setup = SMB_MALLOC_ARRAY(uint16,suwcnt)) == NULL) {
+ DEBUG(0,("reply_trans: setup malloc fail for %u bytes !\n", (unsigned int)(suwcnt * sizeof(uint16))));
+ SAFE_FREE(data);
+ SAFE_FREE(params);
+ END_PROFILE(SMBtrans);
+ return(ERROR_DOS(ERRDOS,ERRnomem));
+ }
+ if (inbuf+smb_vwv14+(suwcnt*SIZEOFWORD) > inbuf + size)
+ goto bad_param;
+ if ((smb_vwv14+(suwcnt*SIZEOFWORD) < smb_vwv14) || (smb_vwv14+(suwcnt*SIZEOFWORD) < (suwcnt*SIZEOFWORD)))
+ goto bad_param;
+
+ for (i=0;i<suwcnt;i++)
+ setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
+ }
+
+
+ srv_signing_trans_start(SVAL(inbuf,smb_mid));
+
+ if (pscnt < tpscnt || dscnt < tdscnt) {
+ /* We need to send an interim response then receive the rest
+ of the parameter/data bytes */
+ outsize = set_message(outbuf,0,0,True);
+ show_msg(outbuf);
+ srv_signing_trans_stop();
+ if (!send_smb(smbd_server_fd(),outbuf))
+ exit_server("reply_trans: send_smb failed.");
+ }
+
+ /* receive the rest of the trans packet */
+ while (pscnt < tpscnt || dscnt < tdscnt) {
+ BOOL ret;
+ unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
+
+ ret = receive_next_smb(inbuf,bufsize,SMB_SECONDARY_WAIT);
+
+ /*
+ * The sequence number for the trans reply is always
+ * based on the last secondary received.
+ */
+
+ srv_signing_trans_start(SVAL(inbuf,smb_mid));
+
+ if ((ret && (CVAL(inbuf, smb_com) != SMBtranss)) || !ret) {
+ if(ret) {
+ DEBUG(0,("reply_trans: Invalid secondary trans packet\n"));
+ } else {
+ DEBUG(0,("reply_trans: %s in getting secondary trans response.\n",
+ (smb_read_error == READ_ERROR) ? "error" : "timeout" ));
+ }
+ SAFE_FREE(params);
+ SAFE_FREE(data);
+ SAFE_FREE(setup);
+ END_PROFILE(SMBtrans);
+ srv_signing_trans_stop();
+ return(ERROR_DOS(ERRSRV,ERRerror));
+ }
+
+ show_msg(inbuf);
+
+ /* Revise total_params and total_data in case they have changed downwards */
+ if (SVAL(inbuf,smb_vwv0) < tpscnt)
+ tpscnt = SVAL(inbuf,smb_vwv0);
+ if (SVAL(inbuf,smb_vwv1) < tdscnt)
+ tdscnt = SVAL(inbuf,smb_vwv1);
+
+ pcnt = SVAL(inbuf,smb_vwv2);
+ poff = SVAL(inbuf,smb_vwv3);
+ pdisp = SVAL(inbuf,smb_vwv4);
+
+ dcnt = SVAL(inbuf,smb_vwv5);
+ doff = SVAL(inbuf,smb_vwv6);
+ ddisp = SVAL(inbuf,smb_vwv7);
+
+ pscnt += pcnt;
+ dscnt += dcnt;
+
+ if (dscnt > tdscnt || pscnt > tpscnt)
+ goto bad_param;
+
+ if (pcnt) {
+ if (pdisp+pcnt > tpscnt)
+ goto bad_param;
+ if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
+ goto bad_param;
+ if (pdisp > tpscnt)
+ goto bad_param;
+ if ((smb_base(inbuf) + poff + pcnt >= inbuf + bufsize) ||
+ (smb_base(inbuf) + poff + pcnt < smb_base(inbuf)))
+ goto bad_param;
+ if (params + pdisp < params)
+ goto bad_param;
+
+ memcpy(params+pdisp,smb_base(inbuf)+poff,pcnt);
+ }
+
+ if (dcnt) {
+ if (ddisp+dcnt > tdscnt)
+ goto bad_param;
+ if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
+ goto bad_param;
+ if (ddisp > tdscnt)
+ goto bad_param;
+ if ((smb_base(inbuf) + doff + dcnt >= inbuf + bufsize) ||
+ (smb_base(inbuf) + doff + dcnt < smb_base(inbuf)))
+ goto bad_param;
+ if (data + ddisp < data)
+ goto bad_param;
+
+ memcpy(data+ddisp,smb_base(inbuf)+doff,dcnt);
+ }
+ }
+
+ DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
+ name,tdscnt,tpscnt,suwcnt));
+
+ /*
+ * WinCE wierdness....
+ */
+
+ fstrcpy( local_machine_name, get_local_machine_name() );
+
+ if (name[0] == '\\' && (StrnCaseCmp(&name[1],local_machine_name, strlen(local_machine_name)) == 0) &&
+ (name[strlen(local_machine_name)+1] == '\\'))
+ name_offset = strlen(local_machine_name)+1;
+
+ if (strnequal(&name[name_offset], "\\PIPE", strlen("\\PIPE"))) {
+ name_offset += strlen("\\PIPE");
+
+ /* Win9x weirdness. When talking to a unicode server Win9x
+ only sends \PIPE instead of \PIPE\ */
+
+ if (name[name_offset] == '\\')
+ name_offset++;
+
+ DEBUG(5,("calling named_pipe\n"));
+ 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);
+
+ srv_signing_trans_stop();
+
+ 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);
+
+
+ bad_param:
+
+ srv_signing_trans_stop();
+ DEBUG(0,("reply_trans: invalid trans parameters\n"));
+ SAFE_FREE(data);
+ SAFE_FREE(params);
+ SAFE_FREE(setup);
+ END_PROFILE(SMBtrans);
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+}
projects / samba / blobdiff