mirror of
https://github.com/samba-team/samba.git
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ef2e26c91b
(This used to be commit b0510b5428
)
1157 lines
32 KiB
C
1157 lines
32 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* RPC Pipe client / server 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) Jeremy Allison 1999.
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*
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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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*
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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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*
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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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#include "includes.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_RPC_SRV
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#define PIPE "\\PIPE\\"
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#define PIPELEN strlen(PIPE)
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static smb_np_struct *chain_p;
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static int pipes_open;
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/*
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* Sometimes I can't decide if I hate Windows printer driver
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* writers more than I hate the Windows spooler service driver
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* writers. This gets around a combination of bugs in the spooler
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* and the HP 8500 PCL driver that causes a spooler spin. JRA.
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*
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* bumped up from 20 -> 64 after viewing traffic from WordPerfect
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* 2002 running on NT 4.- SP6
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* bumped up from 64 -> 256 after viewing traffic from con2prt
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* for lots of printers on a WinNT 4.x SP6 box.
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*/
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#ifndef MAX_OPEN_SPOOLSS_PIPES
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#define MAX_OPEN_SPOOLSS_PIPES 256
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#endif
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static int current_spoolss_pipes_open;
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static smb_np_struct *Pipes;
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static pipes_struct *InternalPipes;
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static struct bitmap *bmap;
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/* TODO
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* the following prototypes are declared here to avoid
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* code being moved about too much for a patch to be
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* disrupted / less obvious.
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*
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* these functions, and associated functions that they
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* call, should be moved behind a .so module-loading
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* system _anyway_. so that's the next step...
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*/
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static ssize_t read_from_internal_pipe(void *np_conn, char *data, size_t n,
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BOOL *is_data_outstanding);
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static ssize_t write_to_internal_pipe(void *np_conn, char *data, size_t n);
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static BOOL close_internal_rpc_pipe_hnd(void *np_conn);
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static void *make_internal_rpc_pipe_p(char *pipe_name,
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struct tcon_context *conn, uint16 vuid);
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/****************************************************************************
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Pipe iterator functions.
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****************************************************************************/
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smb_np_struct *get_first_pipe(void)
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{
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return Pipes;
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}
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smb_np_struct *get_next_pipe(smb_np_struct *p)
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{
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return p->next;
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}
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/****************************************************************************
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Internal Pipe iterator functions.
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****************************************************************************/
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pipes_struct *get_first_internal_pipe(void)
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{
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return InternalPipes;
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}
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pipes_struct *get_next_internal_pipe(pipes_struct *p)
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{
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return p->next;
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}
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/* this must be larger than the sum of the open files and directories */
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static int pipe_handle_offset;
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/****************************************************************************
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Set the pipe_handle_offset. Called from smbd/files.c
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****************************************************************************/
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void set_pipe_handle_offset(int max_open_files)
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{
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if(max_open_files < 0x7000)
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pipe_handle_offset = 0x7000;
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else
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pipe_handle_offset = max_open_files + 10; /* For safety. :-) */
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}
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/****************************************************************************
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Reset pipe chain handle number.
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****************************************************************************/
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void reset_chain_p(void)
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{
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chain_p = NULL;
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}
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/****************************************************************************
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Initialise pipe handle states.
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****************************************************************************/
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void init_rpc_pipe_hnd(void)
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{
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bmap = bitmap_allocate(MAX_OPEN_PIPES);
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if (!bmap)
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exit_server("out of memory in init_rpc_pipe_hnd");
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}
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/****************************************************************************
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Initialise an outgoing packet.
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****************************************************************************/
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static BOOL pipe_init_outgoing_data(pipes_struct *p)
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{
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output_data *o_data = &p->out_data;
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/* Reset the offset counters. */
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o_data->data_sent_length = 0;
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o_data->current_pdu_len = 0;
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o_data->current_pdu_sent = 0;
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memset(o_data->current_pdu, '\0', sizeof(o_data->current_pdu));
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/* Free any memory in the current return data buffer. */
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prs_mem_free(&o_data->rdata);
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/*
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* Initialize the outgoing RPC data buffer.
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* we will use this as the raw data area for replying to rpc requests.
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*/
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if(!prs_init(&o_data->rdata, MAX_PDU_FRAG_LEN, p->mem_ctx, MARSHALL)) {
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DEBUG(0,("pipe_init_outgoing_data: malloc fail.\n"));
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return False;
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}
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return True;
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}
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/****************************************************************************
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Find first available pipe slot.
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****************************************************************************/
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smb_np_struct *open_rpc_pipe_p(char *pipe_name,
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struct tcon_context *conn, uint16 vuid)
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{
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int i;
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smb_np_struct *p, *p_it;
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static int next_pipe;
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BOOL is_spoolss_pipe = False;
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DEBUG(4,("Open pipe requested %s (pipes_open=%d)\n",
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pipe_name, pipes_open));
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if (strstr(pipe_name, "spoolss"))
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is_spoolss_pipe = True;
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if (is_spoolss_pipe && current_spoolss_pipes_open >= MAX_OPEN_SPOOLSS_PIPES) {
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DEBUG(10,("open_rpc_pipe_p: spooler bug workaround. Denying open on pipe %s\n",
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pipe_name ));
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return NULL;
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}
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/* not repeating pipe numbers makes it easier to track things in
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log files and prevents client bugs where pipe numbers are reused
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over connection restarts */
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if (next_pipe == 0)
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next_pipe = (sys_getpid() ^ time(NULL)) % MAX_OPEN_PIPES;
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i = bitmap_find(bmap, next_pipe);
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if (i == -1) {
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DEBUG(0,("ERROR! Out of pipe structures\n"));
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return NULL;
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}
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next_pipe = (i+1) % MAX_OPEN_PIPES;
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for (p = Pipes; p; p = p->next)
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DEBUG(5,("open_rpc_pipe_p: name %s pnum=%x\n", p->name, p->pnum));
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p = (smb_np_struct *)malloc(sizeof(*p));
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if (!p) {
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DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
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return NULL;
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}
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ZERO_STRUCTP(p);
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/* add a dso mechanism instead of this, here */
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p->namedpipe_create = make_internal_rpc_pipe_p;
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p->namedpipe_read = read_from_internal_pipe;
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p->namedpipe_write = write_to_internal_pipe;
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p->namedpipe_close = close_internal_rpc_pipe_hnd;
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p->np_state = p->namedpipe_create(pipe_name, conn, vuid);
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if (p->np_state == NULL) {
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DEBUG(0,("open_rpc_pipe_p: make_internal_rpc_pipe_p failed.\n"));
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SAFE_FREE(p);
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return NULL;
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}
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DLIST_ADD(Pipes, p);
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/*
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* Initialize the incoming RPC data buffer with one PDU worth of memory.
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* We cheat here and say we're marshalling, as we intend to add incoming
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* data directly into the prs_struct and we want it to auto grow. We will
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* change the type to UNMARSALLING before processing the stream.
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*/
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bitmap_set(bmap, i);
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i += pipe_handle_offset;
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pipes_open++;
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p->pnum = i;
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p->open = True;
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p->device_state = 0;
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p->priority = 0;
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p->conn = conn;
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p->vuid = vuid;
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p->max_trans_reply = 0;
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fstrcpy(p->name, pipe_name);
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DEBUG(4,("Opened pipe %s with handle %x (pipes_open=%d)\n",
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pipe_name, i, pipes_open));
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chain_p = p;
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/* Iterate over p_it as a temp variable, to display all open pipes */
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for (p_it = Pipes; p_it; p_it = p_it->next)
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DEBUG(5,("open pipes: name %s pnum=%x\n", p_it->name, p_it->pnum));
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return chain_p;
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}
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/****************************************************************************
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Make an internal namedpipes structure
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****************************************************************************/
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static void *make_internal_rpc_pipe_p(char *pipe_name,
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struct tcon_context *conn, uint16 vuid)
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{
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pipes_struct *p;
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user_struct *vuser = get_valid_user_struct(vuid);
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DEBUG(4,("Create pipe requested %s\n", pipe_name));
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if (!vuser && vuid != UID_FIELD_INVALID) {
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DEBUG(0,("ERROR! vuid %d did not map to a valid vuser struct!\n", vuid));
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return NULL;
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}
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p = (pipes_struct *)malloc(sizeof(*p));
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if (!p)
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{
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DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
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return NULL;
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}
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ZERO_STRUCTP(p);
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if ((p->mem_ctx = talloc_init("pipe %s %p", pipe_name, p)) == NULL) {
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DEBUG(0,("open_rpc_pipe_p: talloc_init failed.\n"));
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SAFE_FREE(p);
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return NULL;
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}
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if (!init_pipe_handle_list(p, pipe_name)) {
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DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
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talloc_destroy(p->mem_ctx);
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SAFE_FREE(p);
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return NULL;
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}
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/*
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* Initialize the incoming RPC data buffer with one PDU worth of memory.
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* We cheat here and say we're marshalling, as we intend to add incoming
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* data directly into the prs_struct and we want it to auto grow. We will
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* change the type to UNMARSALLING before processing the stream.
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*/
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if(!prs_init(&p->in_data.data, MAX_PDU_FRAG_LEN, p->mem_ctx, MARSHALL)) {
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DEBUG(0,("open_rpc_pipe_p: malloc fail for in_data struct.\n"));
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return NULL;
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}
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DLIST_ADD(InternalPipes, p);
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p->conn = conn;
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/* Ensure the connection isn't idled whilst this pipe is open. */
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p->conn->num_files_open++;
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p->vuid = vuid;
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p->ntlmssp_chal_flags = 0;
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p->ntlmssp_auth_validated = False;
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p->ntlmssp_auth_requested = False;
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p->pipe_bound = False;
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p->fault_state = False;
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p->endian = RPC_LITTLE_ENDIAN;
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ZERO_STRUCT(p->pipe_user);
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p->pipe_user.uid = (uid_t)-1;
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p->pipe_user.gid = (gid_t)-1;
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/* Store the session key and NT_TOKEN */
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if (vuser) {
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memcpy(p->session_key, vuser->session_key, sizeof(p->session_key));
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p->pipe_user.nt_user_token = dup_nt_token(vuser->nt_user_token);
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}
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/*
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* Initialize the incoming RPC struct.
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*/
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p->in_data.pdu_needed_len = 0;
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p->in_data.pdu_received_len = 0;
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/*
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* Initialize the outgoing RPC struct.
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*/
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p->out_data.current_pdu_len = 0;
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p->out_data.current_pdu_sent = 0;
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p->out_data.data_sent_length = 0;
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/*
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* Initialize the outgoing RPC data buffer with no memory.
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*/
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prs_init(&p->out_data.rdata, 0, p->mem_ctx, MARSHALL);
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fstrcpy(p->name, pipe_name);
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DEBUG(4,("Created internal pipe %s (pipes_open=%d)\n",
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pipe_name, pipes_open));
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return (void*)p;
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}
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/****************************************************************************
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Sets the fault state on incoming packets.
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****************************************************************************/
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static void set_incoming_fault(pipes_struct *p)
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{
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prs_mem_free(&p->in_data.data);
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p->in_data.pdu_needed_len = 0;
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p->in_data.pdu_received_len = 0;
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p->fault_state = True;
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DEBUG(10,("set_incoming_fault: Setting fault state on pipe %s : vuid = 0x%x\n",
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p->name, p->vuid ));
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}
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/****************************************************************************
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Ensures we have at least RPC_HEADER_LEN amount of data in the incoming buffer.
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****************************************************************************/
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static ssize_t fill_rpc_header(pipes_struct *p, char *data, size_t data_to_copy)
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{
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size_t len_needed_to_complete_hdr = MIN(data_to_copy, RPC_HEADER_LEN - p->in_data.pdu_received_len);
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DEBUG(10,("fill_rpc_header: data_to_copy = %u, len_needed_to_complete_hdr = %u, receive_len = %u\n",
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(unsigned int)data_to_copy, (unsigned int)len_needed_to_complete_hdr,
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(unsigned int)p->in_data.pdu_received_len ));
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memcpy((char *)&p->in_data.current_in_pdu[p->in_data.pdu_received_len], data, len_needed_to_complete_hdr);
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p->in_data.pdu_received_len += len_needed_to_complete_hdr;
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return (ssize_t)len_needed_to_complete_hdr;
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}
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/****************************************************************************
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Unmarshalls a new PDU header. Assumes the raw header data is in current_in_pdu.
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****************************************************************************/
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static ssize_t unmarshall_rpc_header(pipes_struct *p)
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{
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/*
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* Unmarshall the header to determine the needed length.
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*/
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prs_struct rpc_in;
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if(p->in_data.pdu_received_len != RPC_HEADER_LEN) {
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DEBUG(0,("unmarshall_rpc_header: assert on rpc header length failed.\n"));
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set_incoming_fault(p);
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return -1;
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}
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prs_init( &rpc_in, 0, p->mem_ctx, UNMARSHALL);
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prs_set_endian_data( &rpc_in, p->endian);
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prs_give_memory( &rpc_in, (char *)&p->in_data.current_in_pdu[0],
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p->in_data.pdu_received_len, False);
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/*
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* Unmarshall the header as this will tell us how much
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* data we need to read to get the complete pdu.
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* This also sets the endian flag in rpc_in.
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*/
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if(!smb_io_rpc_hdr("", &p->hdr, &rpc_in, 0)) {
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DEBUG(0,("unmarshall_rpc_header: failed to unmarshall RPC_HDR.\n"));
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set_incoming_fault(p);
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prs_mem_free(&rpc_in);
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return -1;
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}
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/*
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* Validate the RPC header.
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*/
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if(p->hdr.major != 5 && p->hdr.minor != 0) {
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DEBUG(0,("unmarshall_rpc_header: invalid major/minor numbers in RPC_HDR.\n"));
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set_incoming_fault(p);
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prs_mem_free(&rpc_in);
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return -1;
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}
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/*
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* If there's not data in the incoming buffer this should be the start of a new RPC.
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*/
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if(prs_offset(&p->in_data.data) == 0) {
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/*
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* AS/U doesn't set FIRST flag in a BIND packet it seems.
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*/
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if ((p->hdr.pkt_type == RPC_REQUEST) && !(p->hdr.flags & RPC_FLG_FIRST)) {
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/*
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* Ensure that the FIRST flag is set. If not then we have
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* a stream missmatch.
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*/
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DEBUG(0,("unmarshall_rpc_header: FIRST flag not set in first PDU !\n"));
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set_incoming_fault(p);
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prs_mem_free(&rpc_in);
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return -1;
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}
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/*
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* If this is the first PDU then set the endianness
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* flag in the pipe. We will need this when parsing all
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* data in this RPC.
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*/
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p->endian = rpc_in.bigendian_data;
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DEBUG(5,("unmarshall_rpc_header: using %sendian RPC\n",
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p->endian == RPC_LITTLE_ENDIAN ? "little-" : "big-" ));
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} else {
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/*
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* If this is *NOT* the first PDU then check the endianness
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* flag in the pipe is the same as that in the PDU.
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*/
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if (p->endian != rpc_in.bigendian_data) {
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DEBUG(0,("unmarshall_rpc_header: FIRST endianness flag (%d) different in next PDU !\n", (int)p->endian));
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set_incoming_fault(p);
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prs_mem_free(&rpc_in);
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return -1;
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}
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}
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/*
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* Ensure that the pdu length is sane.
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*/
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if((p->hdr.frag_len < RPC_HEADER_LEN) || (p->hdr.frag_len > MAX_PDU_FRAG_LEN)) {
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DEBUG(0,("unmarshall_rpc_header: assert on frag length failed.\n"));
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set_incoming_fault(p);
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prs_mem_free(&rpc_in);
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return -1;
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}
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|
|
DEBUG(10,("unmarshall_rpc_header: type = %u, flags = %u\n", (unsigned int)p->hdr.pkt_type,
|
|
(unsigned int)p->hdr.flags ));
|
|
|
|
/*
|
|
* Adjust for the header we just ate.
|
|
*/
|
|
p->in_data.pdu_received_len = 0;
|
|
p->in_data.pdu_needed_len = (uint32)p->hdr.frag_len - RPC_HEADER_LEN;
|
|
|
|
/*
|
|
* Null the data we just ate.
|
|
*/
|
|
|
|
memset((char *)&p->in_data.current_in_pdu[0], '\0', RPC_HEADER_LEN);
|
|
|
|
prs_mem_free(&rpc_in);
|
|
|
|
return 0; /* No extra data processed. */
|
|
}
|
|
|
|
/****************************************************************************
|
|
Call this to free any talloc'ed memory. Do this before and after processing
|
|
a complete PDU.
|
|
****************************************************************************/
|
|
|
|
void free_pipe_context(pipes_struct *p)
|
|
{
|
|
if (p->mem_ctx) {
|
|
DEBUG(3,("free_pipe_context: destroying talloc pool of size %u\n", talloc_pool_size(p->mem_ctx) ));
|
|
talloc_destroy_pool(p->mem_ctx);
|
|
} else {
|
|
p->mem_ctx = talloc_init("pipe %s %p", p->name, p);
|
|
if (p->mem_ctx == NULL)
|
|
p->fault_state = True;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
Processes a request pdu. This will do auth processing if needed, and
|
|
appends the data into the complete stream if the LAST flag is not set.
|
|
****************************************************************************/
|
|
|
|
static BOOL process_request_pdu(pipes_struct *p, prs_struct *rpc_in_p)
|
|
{
|
|
BOOL auth_verify = ((p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SIGN) != 0);
|
|
size_t data_len = p->hdr.frag_len - RPC_HEADER_LEN - RPC_HDR_REQ_LEN -
|
|
(auth_verify ? RPC_HDR_AUTH_LEN : 0) - p->hdr.auth_len;
|
|
|
|
if(!p->pipe_bound) {
|
|
DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Check if we need to do authentication processing.
|
|
* This is only done on requests, not binds.
|
|
*/
|
|
|
|
/*
|
|
* Read the RPC request header.
|
|
*/
|
|
|
|
if(!smb_io_rpc_hdr_req("req", &p->hdr_req, rpc_in_p, 0)) {
|
|
DEBUG(0,("process_request_pdu: failed to unmarshall RPC_HDR_REQ.\n"));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
if(p->ntlmssp_auth_validated && !api_pipe_auth_process(p, rpc_in_p)) {
|
|
DEBUG(0,("process_request_pdu: failed to do auth processing.\n"));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
if (p->ntlmssp_auth_requested && !p->ntlmssp_auth_validated) {
|
|
|
|
/*
|
|
* Authentication _was_ requested and it already failed.
|
|
*/
|
|
|
|
DEBUG(0,("process_request_pdu: RPC request received on pipe %s where \
|
|
authentication failed. Denying the request.\n", p->name));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Check the data length doesn't go over the 15Mb limit.
|
|
* increased after observing a bug in the Windows NT 4.0 SP6a
|
|
* spoolsv.exe when the response to a GETPRINTERDRIVER2 RPC
|
|
* will not fit in the initial buffer of size 0x1068 --jerry 22/01/2002
|
|
*/
|
|
|
|
if(prs_offset(&p->in_data.data) + data_len > 15*1024*1024) {
|
|
DEBUG(0,("process_request_pdu: rpc data buffer too large (%u) + (%u)\n",
|
|
(unsigned int)prs_data_size(&p->in_data.data), (unsigned int)data_len ));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Append the data portion into the buffer and return.
|
|
*/
|
|
|
|
if(!prs_append_some_prs_data(&p->in_data.data, rpc_in_p, prs_offset(rpc_in_p), data_len)) {
|
|
DEBUG(0,("process_request_pdu: Unable to append data size %u to parse buffer of size %u.\n",
|
|
(unsigned int)data_len, (unsigned int)prs_data_size(&p->in_data.data) ));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
if(p->hdr.flags & RPC_FLG_LAST) {
|
|
BOOL ret = False;
|
|
/*
|
|
* Ok - we finally have a complete RPC stream.
|
|
* Call the rpc command to process it.
|
|
*/
|
|
|
|
/*
|
|
* Ensure the internal prs buffer size is *exactly* the same
|
|
* size as the current offset.
|
|
*/
|
|
|
|
if(!prs_set_buffer_size(&p->in_data.data, prs_offset(&p->in_data.data)))
|
|
{
|
|
DEBUG(0,("process_request_pdu: Call to prs_set_buffer_size failed!\n"));
|
|
set_incoming_fault(p);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Set the parse offset to the start of the data and set the
|
|
* prs_struct to UNMARSHALL.
|
|
*/
|
|
|
|
prs_set_offset(&p->in_data.data, 0);
|
|
prs_switch_type(&p->in_data.data, UNMARSHALL);
|
|
|
|
/*
|
|
* Process the complete data stream here.
|
|
*/
|
|
|
|
free_pipe_context(p);
|
|
|
|
if(pipe_init_outgoing_data(p))
|
|
ret = api_pipe_request(p);
|
|
|
|
free_pipe_context(p);
|
|
|
|
/*
|
|
* We have consumed the whole data stream. Set back to
|
|
* marshalling and set the offset back to the start of
|
|
* the buffer to re-use it (we could also do a prs_mem_free()
|
|
* and then re_init on the next start of PDU. Not sure which
|
|
* is best here.... JRA.
|
|
*/
|
|
|
|
prs_switch_type(&p->in_data.data, MARSHALL);
|
|
prs_set_offset(&p->in_data.data, 0);
|
|
return ret;
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Processes a finished PDU stored in current_in_pdu. The RPC_HEADER has
|
|
already been parsed and stored in p->hdr.
|
|
****************************************************************************/
|
|
|
|
static ssize_t process_complete_pdu(pipes_struct *p)
|
|
{
|
|
prs_struct rpc_in;
|
|
size_t data_len = p->in_data.pdu_received_len;
|
|
char *data_p = (char *)&p->in_data.current_in_pdu[0];
|
|
BOOL reply = False;
|
|
|
|
if(p->fault_state) {
|
|
DEBUG(10,("process_complete_pdu: pipe %s in fault state.\n",
|
|
p->name ));
|
|
set_incoming_fault(p);
|
|
setup_fault_pdu(p, NT_STATUS(0x1c010002));
|
|
return (ssize_t)data_len;
|
|
}
|
|
|
|
prs_init( &rpc_in, 0, p->mem_ctx, UNMARSHALL);
|
|
|
|
/*
|
|
* Ensure we're using the corrent endianness for both the
|
|
* RPC header flags and the raw data we will be reading from.
|
|
*/
|
|
|
|
prs_set_endian_data( &rpc_in, p->endian);
|
|
prs_set_endian_data( &p->in_data.data, p->endian);
|
|
|
|
prs_give_memory( &rpc_in, data_p, (uint32)data_len, False);
|
|
|
|
DEBUG(10,("process_complete_pdu: processing packet type %u\n",
|
|
(unsigned int)p->hdr.pkt_type ));
|
|
|
|
switch (p->hdr.pkt_type) {
|
|
case RPC_BIND:
|
|
case RPC_ALTCONT:
|
|
/*
|
|
* We assume that a pipe bind is only in one pdu.
|
|
*/
|
|
if(pipe_init_outgoing_data(p))
|
|
reply = api_pipe_bind_req(p, &rpc_in);
|
|
break;
|
|
case RPC_BINDRESP:
|
|
/*
|
|
* We assume that a pipe bind_resp is only in one pdu.
|
|
*/
|
|
if(pipe_init_outgoing_data(p))
|
|
reply = api_pipe_bind_auth_resp(p, &rpc_in);
|
|
break;
|
|
case RPC_REQUEST:
|
|
reply = process_request_pdu(p, &rpc_in);
|
|
break;
|
|
default:
|
|
DEBUG(0,("process_complete_pdu: Unknown rpc type = %u received.\n", (unsigned int)p->hdr.pkt_type ));
|
|
break;
|
|
}
|
|
|
|
/* Reset to little endian. Probably don't need this but it won't hurt. */
|
|
prs_set_endian_data( &p->in_data.data, RPC_LITTLE_ENDIAN);
|
|
|
|
if (!reply) {
|
|
DEBUG(3,("process_complete_pdu: DCE/RPC fault sent on pipe %s\n", p->pipe_srv_name));
|
|
set_incoming_fault(p);
|
|
setup_fault_pdu(p, NT_STATUS(0x1c010002));
|
|
prs_mem_free(&rpc_in);
|
|
} else {
|
|
/*
|
|
* Reset the lengths. We're ready for a new pdu.
|
|
*/
|
|
p->in_data.pdu_needed_len = 0;
|
|
p->in_data.pdu_received_len = 0;
|
|
}
|
|
|
|
prs_mem_free(&rpc_in);
|
|
return (ssize_t)data_len;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Accepts incoming data on an rpc pipe. Processes the data in pdu sized units.
|
|
****************************************************************************/
|
|
|
|
static ssize_t process_incoming_data(pipes_struct *p, char *data, size_t n)
|
|
{
|
|
size_t data_to_copy = MIN(n, MAX_PDU_FRAG_LEN - p->in_data.pdu_received_len);
|
|
|
|
DEBUG(10,("process_incoming_data: Start: pdu_received_len = %u, pdu_needed_len = %u, incoming data = %u\n",
|
|
(unsigned int)p->in_data.pdu_received_len, (unsigned int)p->in_data.pdu_needed_len,
|
|
(unsigned int)n ));
|
|
|
|
if(data_to_copy == 0) {
|
|
/*
|
|
* This is an error - data is being received and there is no
|
|
* space in the PDU. Free the received data and go into the fault state.
|
|
*/
|
|
DEBUG(0,("process_incoming_data: No space in incoming pdu buffer. Current size = %u \
|
|
incoming data size = %u\n", (unsigned int)p->in_data.pdu_received_len, (unsigned int)n ));
|
|
set_incoming_fault(p);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* If we have no data already, wait until we get at least a RPC_HEADER_LEN
|
|
* number of bytes before we can do anything.
|
|
*/
|
|
|
|
if((p->in_data.pdu_needed_len == 0) && (p->in_data.pdu_received_len < RPC_HEADER_LEN)) {
|
|
/*
|
|
* Always return here. If we have more data then the RPC_HEADER
|
|
* will be processed the next time around the loop.
|
|
*/
|
|
return fill_rpc_header(p, data, data_to_copy);
|
|
}
|
|
|
|
/*
|
|
* At this point we know we have at least an RPC_HEADER_LEN amount of data
|
|
* stored in current_in_pdu.
|
|
*/
|
|
|
|
/*
|
|
* If pdu_needed_len is zero this is a new pdu.
|
|
* Unmarshall the header so we know how much more
|
|
* data we need, then loop again.
|
|
*/
|
|
|
|
if(p->in_data.pdu_needed_len == 0)
|
|
return unmarshall_rpc_header(p);
|
|
|
|
/*
|
|
* Ok - at this point we have a valid RPC_HEADER in p->hdr.
|
|
* Keep reading until we have a full pdu.
|
|
*/
|
|
|
|
data_to_copy = MIN(data_to_copy, p->in_data.pdu_needed_len);
|
|
|
|
/*
|
|
* Copy as much of the data as we need into the current_in_pdu buffer.
|
|
*/
|
|
|
|
memcpy( (char *)&p->in_data.current_in_pdu[p->in_data.pdu_received_len], data, data_to_copy);
|
|
p->in_data.pdu_received_len += data_to_copy;
|
|
|
|
/*
|
|
* Do we have a complete PDU ?
|
|
*/
|
|
|
|
if(p->in_data.pdu_received_len == p->in_data.pdu_needed_len)
|
|
return process_complete_pdu(p);
|
|
|
|
DEBUG(10,("process_incoming_data: not a complete PDU yet. pdu_received_len = %u, pdu_needed_len = %u\n",
|
|
(unsigned int)p->in_data.pdu_received_len, (unsigned int)p->in_data.pdu_needed_len ));
|
|
|
|
return (ssize_t)data_to_copy;
|
|
|
|
}
|
|
|
|
/****************************************************************************
|
|
Accepts incoming data on an rpc pipe.
|
|
****************************************************************************/
|
|
|
|
ssize_t write_to_pipe(smb_np_struct *p, char *data, size_t n)
|
|
{
|
|
DEBUG(6,("write_to_pipe: %x", p->pnum));
|
|
|
|
DEBUG(6,(" name: %s open: %s len: %d\n",
|
|
p->name, BOOLSTR(p->open), (int)n));
|
|
|
|
dump_data(50, data, n);
|
|
|
|
return p->namedpipe_write(p->np_state, data, n);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Accepts incoming data on an internal rpc pipe.
|
|
****************************************************************************/
|
|
|
|
static ssize_t write_to_internal_pipe(void *np_conn, char *data, size_t n)
|
|
{
|
|
pipes_struct *p = (pipes_struct*)np_conn;
|
|
size_t data_left = n;
|
|
|
|
while(data_left) {
|
|
ssize_t data_used;
|
|
|
|
DEBUG(10,("write_to_pipe: data_left = %u\n", (unsigned int)data_left ));
|
|
|
|
data_used = process_incoming_data(p, data, data_left);
|
|
|
|
DEBUG(10,("write_to_pipe: data_used = %d\n", (int)data_used ));
|
|
|
|
if(data_used < 0)
|
|
return -1;
|
|
|
|
data_left -= data_used;
|
|
data += data_used;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Replies to a request to read data from a pipe.
|
|
|
|
Headers are interspersed with the data at PDU intervals. By the time
|
|
this function is called, the start of the data could possibly have been
|
|
read by an SMBtrans (file_offset != 0).
|
|
|
|
Calling create_rpc_reply() here is a hack. The data should already
|
|
have been prepared into arrays of headers + data stream sections.
|
|
****************************************************************************/
|
|
|
|
ssize_t read_from_pipe(smb_np_struct *p, char *data, size_t n,
|
|
BOOL *is_data_outstanding)
|
|
{
|
|
if (!p || !p->open) {
|
|
DEBUG(0,("read_from_pipe: pipe not open\n"));
|
|
return -1;
|
|
}
|
|
|
|
DEBUG(6,("read_from_pipe: %x", p->pnum));
|
|
|
|
return p->namedpipe_read(p->np_state, data, n, is_data_outstanding);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Replies to a request to read data from a pipe.
|
|
|
|
Headers are interspersed with the data at PDU intervals. By the time
|
|
this function is called, the start of the data could possibly have been
|
|
read by an SMBtrans (file_offset != 0).
|
|
|
|
Calling create_rpc_reply() here is a hack. The data should already
|
|
have been prepared into arrays of headers + data stream sections.
|
|
****************************************************************************/
|
|
|
|
static ssize_t read_from_internal_pipe(void *np_conn, char *data, size_t n,
|
|
BOOL *is_data_outstanding)
|
|
{
|
|
pipes_struct *p = (pipes_struct*)np_conn;
|
|
uint32 pdu_remaining = 0;
|
|
ssize_t data_returned = 0;
|
|
|
|
if (!p) {
|
|
DEBUG(0,("read_from_pipe: pipe not open\n"));
|
|
return -1;
|
|
}
|
|
|
|
DEBUG(6,(" name: %s len: %u\n", p->name, (unsigned int)n));
|
|
|
|
/*
|
|
* We cannot return more than one PDU length per
|
|
* read request.
|
|
*/
|
|
|
|
/*
|
|
* This condition should result in the connection being closed.
|
|
* Netapp filers seem to set it to 0xffff which results in domain
|
|
* authentications failing. Just ignore it so things work.
|
|
*/
|
|
|
|
if(n > MAX_PDU_FRAG_LEN) {
|
|
DEBUG(5,("read_from_pipe: too large read (%u) requested on \
|
|
pipe %s. We can only service %d sized reads.\n", (unsigned int)n, p->name, MAX_PDU_FRAG_LEN ));
|
|
}
|
|
|
|
/*
|
|
* Determine if there is still data to send in the
|
|
* pipe PDU buffer. Always send this first. Never
|
|
* send more than is left in the current PDU. The
|
|
* client should send a new read request for a new
|
|
* PDU.
|
|
*/
|
|
|
|
if((pdu_remaining = p->out_data.current_pdu_len - p->out_data.current_pdu_sent) > 0) {
|
|
data_returned = (ssize_t)MIN(n, pdu_remaining);
|
|
|
|
DEBUG(10,("read_from_pipe: %s: current_pdu_len = %u, current_pdu_sent = %u \
|
|
returning %d bytes.\n", p->name, (unsigned int)p->out_data.current_pdu_len,
|
|
(unsigned int)p->out_data.current_pdu_sent, (int)data_returned));
|
|
|
|
memcpy( data, &p->out_data.current_pdu[p->out_data.current_pdu_sent], (size_t)data_returned);
|
|
p->out_data.current_pdu_sent += (uint32)data_returned;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* At this point p->current_pdu_len == p->current_pdu_sent (which
|
|
* may of course be zero if this is the first return fragment.
|
|
*/
|
|
|
|
DEBUG(10,("read_from_pipe: %s: fault_state = %d : data_sent_length \
|
|
= %u, prs_offset(&p->out_data.rdata) = %u.\n",
|
|
p->name, (int)p->fault_state, (unsigned int)p->out_data.data_sent_length, (unsigned int)prs_offset(&p->out_data.rdata) ));
|
|
|
|
if(p->out_data.data_sent_length >= prs_offset(&p->out_data.rdata)) {
|
|
/*
|
|
* We have sent all possible data, return 0.
|
|
*/
|
|
data_returned = 0;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We need to create a new PDU from the data left in p->rdata.
|
|
* Create the header/data/footers. This also sets up the fields
|
|
* p->current_pdu_len, p->current_pdu_sent, p->data_sent_length
|
|
* and stores the outgoing PDU in p->current_pdu.
|
|
*/
|
|
|
|
if(!create_next_pdu(p)) {
|
|
DEBUG(0,("read_from_pipe: %s: create_next_pdu failed.\n", p->name));
|
|
return -1;
|
|
}
|
|
|
|
data_returned = MIN(n, p->out_data.current_pdu_len);
|
|
|
|
memcpy( data, p->out_data.current_pdu, (size_t)data_returned);
|
|
p->out_data.current_pdu_sent += (uint32)data_returned;
|
|
|
|
out:
|
|
|
|
(*is_data_outstanding) = p->out_data.current_pdu_len > n;
|
|
return data_returned;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Wait device state on a pipe. Exactly what this is for is unknown...
|
|
****************************************************************************/
|
|
|
|
BOOL wait_rpc_pipe_hnd_state(smb_np_struct *p, uint16 priority)
|
|
{
|
|
if (p == NULL)
|
|
return False;
|
|
|
|
if (p->open) {
|
|
DEBUG(3,("wait_rpc_pipe_hnd_state: Setting pipe wait state priority=%x on pipe (name=%s)\n",
|
|
priority, p->name));
|
|
|
|
p->priority = priority;
|
|
|
|
return True;
|
|
}
|
|
|
|
DEBUG(3,("wait_rpc_pipe_hnd_state: Error setting pipe wait state priority=%x (name=%s)\n",
|
|
priority, p->name));
|
|
return False;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
Set device state on a pipe. Exactly what this is for is unknown...
|
|
****************************************************************************/
|
|
|
|
BOOL set_rpc_pipe_hnd_state(smb_np_struct *p, uint16 device_state)
|
|
{
|
|
if (p == NULL)
|
|
return False;
|
|
|
|
if (p->open) {
|
|
DEBUG(3,("set_rpc_pipe_hnd_state: Setting pipe device state=%x on pipe (name=%s)\n",
|
|
device_state, p->name));
|
|
|
|
p->device_state = device_state;
|
|
|
|
return True;
|
|
}
|
|
|
|
DEBUG(3,("set_rpc_pipe_hnd_state: Error setting pipe device state=%x (name=%s)\n",
|
|
device_state, p->name));
|
|
return False;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
Close an rpc pipe.
|
|
****************************************************************************/
|
|
|
|
BOOL close_rpc_pipe_hnd(smb_np_struct *p)
|
|
{
|
|
if (!p) {
|
|
DEBUG(0,("Invalid pipe in close_rpc_pipe_hnd\n"));
|
|
return False;
|
|
}
|
|
|
|
p->namedpipe_close(p->np_state);
|
|
|
|
bitmap_clear(bmap, p->pnum - pipe_handle_offset);
|
|
|
|
pipes_open--;
|
|
|
|
DEBUG(4,("closed pipe name %s pnum=%x (pipes_open=%d)\n",
|
|
p->name, p->pnum, pipes_open));
|
|
|
|
DLIST_REMOVE(Pipes, p);
|
|
|
|
ZERO_STRUCTP(p);
|
|
|
|
SAFE_FREE(p);
|
|
|
|
return True;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Close an rpc pipe.
|
|
****************************************************************************/
|
|
|
|
static BOOL close_internal_rpc_pipe_hnd(void *np_conn)
|
|
{
|
|
pipes_struct *p = (pipes_struct *)np_conn;
|
|
if (!p) {
|
|
DEBUG(0,("Invalid pipe in close_internal_rpc_pipe_hnd\n"));
|
|
return False;
|
|
}
|
|
|
|
prs_mem_free(&p->out_data.rdata);
|
|
prs_mem_free(&p->in_data.data);
|
|
|
|
if (p->mem_ctx)
|
|
talloc_destroy(p->mem_ctx);
|
|
|
|
/* Free the handles database. */
|
|
close_policy_by_pipe(p);
|
|
|
|
delete_nt_token(&p->pipe_user.nt_user_token);
|
|
SAFE_FREE(p->pipe_user.groups);
|
|
|
|
DLIST_REMOVE(InternalPipes, p);
|
|
|
|
p->conn->num_files_open--;
|
|
|
|
ZERO_STRUCTP(p);
|
|
|
|
SAFE_FREE(p);
|
|
|
|
return True;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Find an rpc pipe given a pipe handle in a buffer and an offset.
|
|
****************************************************************************/
|
|
|
|
smb_np_struct *get_rpc_pipe_p(char *buf, int where)
|
|
{
|
|
int pnum = SVAL(buf,where);
|
|
|
|
if (chain_p)
|
|
return chain_p;
|
|
|
|
return get_rpc_pipe(pnum);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Find an rpc pipe given a pipe handle.
|
|
****************************************************************************/
|
|
|
|
smb_np_struct *get_rpc_pipe(int pnum)
|
|
{
|
|
smb_np_struct *p;
|
|
|
|
DEBUG(4,("search for pipe pnum=%x\n", pnum));
|
|
|
|
for (p=Pipes;p;p=p->next)
|
|
DEBUG(5,("pipe name %s pnum=%x (pipes_open=%d)\n",
|
|
p->name, p->pnum, pipes_open));
|
|
|
|
for (p=Pipes;p;p=p->next) {
|
|
if (p->pnum == pnum) {
|
|
chain_p = p;
|
|
return p;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|