mirror of
https://github.com/samba-team/samba.git
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afc93255d1
negotiation works.
Jeremy.
(This used to be commit d78045601a
)
332 lines
8.4 KiB
C
332 lines
8.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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Pipe SMB reply routines
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Luke Kenneth Casson Leighton 1996-1998
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Copyright (C) Paul Ashton 1997-1998.
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Copyright (C) Jeremy Allison 2005.
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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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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/*
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This file handles reply_ calls on named pipes that the server
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makes to handle specific protocols
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*/
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#include "includes.h"
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#define PIPE "\\PIPE\\"
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#define PIPELEN strlen(PIPE)
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#define MAX_PIPE_NAME_LEN 24
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/* PIPE/<name>/<pid>/<pnum> */
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#define PIPEDB_KEY_FORMAT "PIPE/%s/%u/%d"
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struct pipe_dbrec {
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struct server_id pid;
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int pnum;
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uid_t uid;
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char name[MAX_PIPE_NAME_LEN];
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fstring user;
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};
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extern struct pipe_id_info pipe_names[];
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/****************************************************************************
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Reply to an open and X on a named pipe.
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This code is basically stolen from reply_open_and_X with some
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wrinkles to handle pipes.
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****************************************************************************/
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void reply_open_pipe_and_X(connection_struct *conn, struct smb_request *req)
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{
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const char *fname = NULL;
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char *pipe_name = NULL;
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smb_np_struct *p;
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int size=0,fmode=0,mtime=0,rmode=0;
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int i;
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TALLOC_CTX *ctx = talloc_tos();
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/* XXXX we need to handle passed times, sattr and flags */
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srvstr_pull_buf_talloc(ctx, req->inbuf, req->flags2, &pipe_name,
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smb_buf(req->inbuf), STR_TERMINATE);
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if (!pipe_name) {
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reply_botherror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND,
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ERRDOS, ERRbadpipe);
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return;
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}
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/* If the name doesn't start \PIPE\ then this is directed */
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/* at a mailslot or something we really, really don't understand, */
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/* not just something we really don't understand. */
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if ( strncmp(pipe_name,PIPE,PIPELEN) != 0 ) {
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reply_doserror(req, ERRSRV, ERRaccess);
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return;
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}
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DEBUG(4,("Opening pipe %s.\n", pipe_name));
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/* See if it is one we want to handle. */
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for( i = 0; pipe_names[i].client_pipe ; i++ ) {
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if( strequal(pipe_name,pipe_names[i].client_pipe)) {
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break;
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}
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}
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if (pipe_names[i].client_pipe == NULL) {
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reply_botherror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND,
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ERRDOS, ERRbadpipe);
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return;
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}
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/* Strip \PIPE\ off the name. */
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fname = pipe_name + PIPELEN;
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#if 0
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/*
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* Hack for NT printers... JRA.
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*/
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if(should_fail_next_srvsvc_open(fname)) {
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reply_doserror(req, ERRSRV, ERRaccess);
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return;
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}
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#endif
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/* Known pipes arrive with DIR attribs. Remove it so a regular file */
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/* can be opened and add it in after the open. */
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DEBUG(3,("Known pipe %s opening.\n",fname));
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p = open_rpc_pipe_p(fname, conn, req->vuid);
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if (!p) {
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reply_doserror(req, ERRSRV, ERRnofids);
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return;
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}
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/* Prepare the reply */
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reply_outbuf(req, 15, 0);
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/* Mark the opened file as an existing named pipe in message mode. */
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SSVAL(req->outbuf,smb_vwv9,2);
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SSVAL(req->outbuf,smb_vwv10,0xc700);
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if (rmode == 2) {
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DEBUG(4,("Resetting open result to open from create.\n"));
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rmode = 1;
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}
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SSVAL(req->outbuf,smb_vwv2, p->pnum);
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SSVAL(req->outbuf,smb_vwv3,fmode);
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srv_put_dos_date3((char *)req->outbuf,smb_vwv4,mtime);
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SIVAL(req->outbuf,smb_vwv6,size);
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SSVAL(req->outbuf,smb_vwv8,rmode);
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SSVAL(req->outbuf,smb_vwv11,0x0001);
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chain_reply(req);
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return;
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}
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/****************************************************************************
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Reply to a write on a pipe.
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****************************************************************************/
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void reply_pipe_write(struct smb_request *req)
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{
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smb_np_struct *p = get_rpc_pipe_p(SVAL(req->inbuf,smb_vwv0));
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size_t numtowrite = SVAL(req->inbuf,smb_vwv1);
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int nwritten;
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char *data;
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if (!p) {
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reply_doserror(req, ERRDOS, ERRbadfid);
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return;
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}
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if (p->vuid != req->vuid) {
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reply_nterror(req, NT_STATUS_INVALID_HANDLE);
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return;
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}
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data = smb_buf(req->inbuf) + 3;
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if (numtowrite == 0) {
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nwritten = 0;
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} else {
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nwritten = write_to_pipe(p, data, numtowrite);
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}
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if ((nwritten == 0 && numtowrite != 0) || (nwritten < 0)) {
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reply_unixerror(req, ERRDOS, ERRnoaccess);
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return;
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}
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reply_outbuf(req, 1, 0);
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SSVAL(req->outbuf,smb_vwv0,nwritten);
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DEBUG(3,("write-IPC pnum=%04x nwritten=%d\n", p->pnum, nwritten));
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return;
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}
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/****************************************************************************
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Reply to a write and X.
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This code is basically stolen from reply_write_and_X with some
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wrinkles to handle pipes.
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****************************************************************************/
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void reply_pipe_write_and_X(struct smb_request *req)
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{
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smb_np_struct *p = get_rpc_pipe_p(SVAL(req->inbuf,smb_vwv2));
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size_t numtowrite = SVAL(req->inbuf,smb_vwv10);
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int nwritten = -1;
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int smb_doff = SVAL(req->inbuf, smb_vwv11);
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bool pipe_start_message_raw =
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((SVAL(req->inbuf, smb_vwv7)
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& (PIPE_START_MESSAGE|PIPE_RAW_MODE))
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== (PIPE_START_MESSAGE|PIPE_RAW_MODE));
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char *data;
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if (!p) {
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reply_doserror(req, ERRDOS, ERRbadfid);
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return;
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}
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if (p->vuid != req->vuid) {
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reply_nterror(req, NT_STATUS_INVALID_HANDLE);
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return;
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}
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data = smb_base(req->inbuf) + smb_doff;
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if (numtowrite == 0) {
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nwritten = 0;
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} else {
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if(pipe_start_message_raw) {
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/*
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* For the start of a message in named pipe byte mode,
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* the first two bytes are a length-of-pdu field. Ignore
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* them (we don't trust the client). JRA.
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*/
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if(numtowrite < 2) {
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DEBUG(0,("reply_pipe_write_and_X: start of "
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"message set and not enough data "
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"sent.(%u)\n",
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(unsigned int)numtowrite ));
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reply_unixerror(req, ERRDOS, ERRnoaccess);
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return;
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}
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data += 2;
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numtowrite -= 2;
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}
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nwritten = write_to_pipe(p, data, numtowrite);
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}
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if ((nwritten == 0 && numtowrite != 0) || (nwritten < 0)) {
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reply_unixerror(req, ERRDOS,ERRnoaccess);
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return;
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}
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reply_outbuf(req, 6, 0);
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nwritten = (pipe_start_message_raw ? nwritten + 2 : nwritten);
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SSVAL(req->outbuf,smb_vwv2,nwritten);
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DEBUG(3,("writeX-IPC pnum=%04x nwritten=%d\n", p->pnum, nwritten));
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chain_reply(req);
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}
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/****************************************************************************
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Reply to a read and X.
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This code is basically stolen from reply_read_and_X with some
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wrinkles to handle pipes.
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****************************************************************************/
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void reply_pipe_read_and_X(struct smb_request *req)
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{
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smb_np_struct *p = get_rpc_pipe_p(SVAL(req->inbuf,smb_vwv2));
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int smb_maxcnt = SVAL(req->inbuf,smb_vwv5);
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int smb_mincnt = SVAL(req->inbuf,smb_vwv6);
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int nread = -1;
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char *data;
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bool unused;
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/* we don't use the offset given to use for pipe reads. This
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is deliberate, instead we always return the next lump of
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data on the pipe */
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#if 0
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uint32 smb_offs = IVAL(req->inbuf,smb_vwv3);
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#endif
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if (!p) {
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reply_doserror(req, ERRDOS, ERRbadfid);
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return;
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}
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reply_outbuf(req, 12, smb_maxcnt);
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data = smb_buf(req->outbuf);
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nread = read_from_pipe(p, data, smb_maxcnt, &unused);
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if (nread < 0) {
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reply_doserror(req, ERRDOS, ERRnoaccess);
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return;
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}
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srv_set_message((const char *)req->inbuf,
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(char *)req->outbuf, 12, nread, False);
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SSVAL(req->outbuf,smb_vwv5,nread);
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SSVAL(req->outbuf,smb_vwv6,smb_offset(data,req->outbuf));
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SSVAL(smb_buf(req->outbuf),-2,nread);
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DEBUG(3,("readX-IPC pnum=%04x min=%d max=%d nread=%d\n",
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p->pnum, smb_mincnt, smb_maxcnt, nread));
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chain_reply(req);
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}
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/****************************************************************************
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Reply to a close.
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****************************************************************************/
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void reply_pipe_close(connection_struct *conn, struct smb_request *req)
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{
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smb_np_struct *p = get_rpc_pipe_p(SVAL(req->inbuf,smb_vwv0));
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if (!p) {
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reply_doserror(req, ERRDOS, ERRbadfid);
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return;
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}
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DEBUG(5,("reply_pipe_close: pnum:%x\n", p->pnum));
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if (!close_rpc_pipe_hnd(p)) {
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reply_doserror(req, ERRDOS, ERRbadfid);
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return;
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}
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/* TODO: REMOVE PIPE FROM DB */
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reply_outbuf(req, 0, 0);
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return;
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}
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