/* 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; extern fstring local_machine; #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_NT(STATUS_BUFFER_OVERFLOW); } 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 = 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(-1); } /* 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))) { DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum)); return api_no_reply(outbuf, mdrcnt); } DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)", 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; } 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); 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 *)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) goto bad_param; memcpy(data,smb_base(inbuf)+dsoff,dscnt); } if (tpscnt) { if((params = (char *)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) goto bad_param; memcpy(params,smb_base(inbuf)+psoff,pscnt); } if (suwcnt) { unsigned int i; if((setup = (uint16 *)malloc(suwcnt*sizeof(uint16))) == 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); } 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); 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); 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); 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 (smb_base(inbuf) + poff + pcnt >= inbuf + bufsize) 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 (smb_base(inbuf) + doff + dcnt >= inbuf + bufsize) 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.... */ if (name[0] == '\\' && (StrnCaseCmp(&name[1],local_machine, strlen(local_machine)) == 0) && (name[strlen(local_machine)+1] == '\\')) name_offset = strlen(local_machine)+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); 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: 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); }