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Diffstat (limited to 'source4/libcli/raw/rawreadwrite.c')
| -rw-r--r-- | source4/libcli/raw/rawreadwrite.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/source4/libcli/raw/rawreadwrite.c b/source4/libcli/raw/rawreadwrite.c new file mode 100644 index 0000000..fb44ba4 --- /dev/null +++ b/source4/libcli/raw/rawreadwrite.c @@ -0,0 +1,345 @@ +/* + Unix SMB/CIFS implementation. + client file read/write routines + Copyright (C) Andrew Tridgell 1994-1998 + Copyright (C) James Myers 2003 + + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "libcli/raw/libcliraw.h" +#include "libcli/raw/raw_proto.h" + +#define SETUP_REQUEST(cmd, wct, buflen) do { \ + req = smbcli_request_setup(tree, cmd, wct, buflen); \ + if (!req) return NULL; \ +} while (0) + +/**************************************************************************** + low level read operation (async send) +****************************************************************************/ +_PUBLIC_ struct smbcli_request *smb_raw_read_send(struct smbcli_tree *tree, union smb_read *parms) +{ + bool bigoffset = false; + struct smbcli_request *req = NULL; + + switch (parms->generic.level) { + case RAW_READ_READBRAW: + if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) { + bigoffset = true; + } + SETUP_REQUEST(SMBreadbraw, bigoffset? 10:8, 0); + SSVAL(req->out.vwv, VWV(0), parms->readbraw.in.file.fnum); + SIVAL(req->out.vwv, VWV(1), parms->readbraw.in.offset); + SSVAL(req->out.vwv, VWV(3), parms->readbraw.in.maxcnt); + SSVAL(req->out.vwv, VWV(4), parms->readbraw.in.mincnt); + SIVAL(req->out.vwv, VWV(5), parms->readbraw.in.timeout); + SSVAL(req->out.vwv, VWV(7), 0); /* reserved */ + if (bigoffset) { + SIVAL(req->out.vwv, VWV(8),parms->readbraw.in.offset>>32); + } + break; + + case RAW_READ_LOCKREAD: + SETUP_REQUEST(SMBlockread, 5, 0); + SSVAL(req->out.vwv, VWV(0), parms->lockread.in.file.fnum); + SSVAL(req->out.vwv, VWV(1), parms->lockread.in.count); + SIVAL(req->out.vwv, VWV(2), parms->lockread.in.offset); + SSVAL(req->out.vwv, VWV(4), parms->lockread.in.remaining); + break; + + case RAW_READ_READ: + SETUP_REQUEST(SMBread, 5, 0); + SSVAL(req->out.vwv, VWV(0), parms->read.in.file.fnum); + SSVAL(req->out.vwv, VWV(1), parms->read.in.count); + SIVAL(req->out.vwv, VWV(2), parms->read.in.offset); + SSVAL(req->out.vwv, VWV(4), parms->read.in.remaining); + break; + + case RAW_READ_READX: + if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) { + bigoffset = true; + } + SETUP_REQUEST(SMBreadX, bigoffset ? 12 : 10, 0); + SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); + SSVAL(req->out.vwv, VWV(1), 0); + SSVAL(req->out.vwv, VWV(2), parms->readx.in.file.fnum); + SIVAL(req->out.vwv, VWV(3), parms->readx.in.offset); + SSVAL(req->out.vwv, VWV(5), parms->readx.in.maxcnt & 0xFFFF); + SSVAL(req->out.vwv, VWV(6), parms->readx.in.mincnt); + SIVAL(req->out.vwv, VWV(7), parms->readx.in.maxcnt >> 16); + SSVAL(req->out.vwv, VWV(9), parms->readx.in.remaining); + /* + * TODO: give an error when the offset is 64 bit + * and the server doesn't support it + */ + if (bigoffset) { + SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32); + } + if (parms->readx.in.read_for_execute) { + uint16_t flags2 = SVAL(req->out.hdr, HDR_FLG2); + flags2 |= FLAGS2_READ_PERMIT_EXECUTE; + SSVAL(req->out.hdr, HDR_FLG2, flags2); + } + break; + + case RAW_READ_SMB2: + return NULL; + } + + if (!smbcli_request_send(req)) { + smbcli_request_destroy(req); + return NULL; + } + + return req; +} + +/**************************************************************************** + low level read operation (async recv) +****************************************************************************/ +_PUBLIC_ NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms) +{ + if (!smbcli_request_receive(req) || + smbcli_request_is_error(req)) { + goto failed; + } + + switch (parms->generic.level) { + case RAW_READ_READBRAW: + parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE; + if (parms->readbraw.out.nread > + MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) { + req->status = NT_STATUS_BUFFER_TOO_SMALL; + goto failed; + } + memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread); + break; + + case RAW_READ_LOCKREAD: + SMBCLI_CHECK_WCT(req, 5); + parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0)); + if (parms->lockread.out.nread > parms->lockread.in.count || + !smbcli_raw_pull_data(&req->in.bufinfo, req->in.data+3, + parms->lockread.out.nread, parms->lockread.out.data)) { + req->status = NT_STATUS_BUFFER_TOO_SMALL; + } + break; + + case RAW_READ_READ: + /* there are 4 reserved words in the reply */ + SMBCLI_CHECK_WCT(req, 5); + parms->read.out.nread = SVAL(req->in.vwv, VWV(0)); + if (parms->read.out.nread > parms->read.in.count || + !smbcli_raw_pull_data(&req->in.bufinfo, req->in.data+3, + parms->read.out.nread, parms->read.out.data)) { + req->status = NT_STATUS_BUFFER_TOO_SMALL; + } + break; + + case RAW_READ_READX: + /* there are 5 reserved words in the reply */ + SMBCLI_CHECK_WCT(req, 12); + parms->readx.out.remaining = SVAL(req->in.vwv, VWV(2)); + parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3)); + parms->readx.out.nread = SVAL(req->in.vwv, VWV(5)); + parms->readx.out.flags2 = req->flags2; + parms->readx.out.data_offset = SVAL(req->in.vwv, VWV(6)); + + /* handle oversize replies for non-chained readx replies with + CAP_LARGE_READX. The snia spec has must to answer for. */ + if ((req->tree->session->transport->negotiate.capabilities & CAP_LARGE_READX) + && CVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE && + req->in.size >= 0x10000) { + parms->readx.out.nread += (SVAL(req->in.vwv, VWV(7)) << 16); + if (req->in.hdr + SVAL(req->in.vwv, VWV(6)) + + parms->readx.out.nread <= + req->in.buffer + req->in.size) { + req->in.data_size += (SVAL(req->in.vwv, VWV(7)) << 16); + + /* update the bufinfo with the new size */ + smb_setup_bufinfo(req); + } + } + + if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) || + !smbcli_raw_pull_data(&req->in.bufinfo, req->in.hdr + SVAL(req->in.vwv, VWV(6)), + parms->readx.out.nread, + parms->readx.out.data)) { + req->status = NT_STATUS_BUFFER_TOO_SMALL; + } + break; + + case RAW_READ_SMB2: + req->status = NT_STATUS_INTERNAL_ERROR; + break; + } + +failed: + return smbcli_request_destroy(req); +} + +/**************************************************************************** + low level read operation (sync interface) +****************************************************************************/ +_PUBLIC_ NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms) +{ + struct smbcli_request *req = smb_raw_read_send(tree, parms); + return smb_raw_read_recv(req, parms); +} + + +/**************************************************************************** + raw write interface (async send) +****************************************************************************/ +_PUBLIC_ struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms) +{ + bool bigoffset = false; + struct smbcli_request *req = NULL; + + switch (parms->generic.level) { + case RAW_WRITE_WRITEUNLOCK: + SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count); + SSVAL(req->out.vwv, VWV(0), parms->writeunlock.in.file.fnum); + SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count); + SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset); + SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining); + SCVAL(req->out.data, 0, SMB_DATA_BLOCK); + SSVAL(req->out.data, 1, parms->writeunlock.in.count); + if (parms->writeunlock.in.count > 0) { + memcpy(req->out.data+3, parms->writeunlock.in.data, + parms->writeunlock.in.count); + } + break; + + case RAW_WRITE_WRITE: + SETUP_REQUEST(SMBwrite, 5, 3 + parms->write.in.count); + SSVAL(req->out.vwv, VWV(0), parms->write.in.file.fnum); + SSVAL(req->out.vwv, VWV(1), parms->write.in.count); + SIVAL(req->out.vwv, VWV(2), parms->write.in.offset); + SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining); + SCVAL(req->out.data, 0, SMB_DATA_BLOCK); + SSVAL(req->out.data, 1, parms->write.in.count); + if (parms->write.in.count > 0) { + memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count); + } + break; + + case RAW_WRITE_WRITECLOSE: + SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count); + SSVAL(req->out.vwv, VWV(0), parms->writeclose.in.file.fnum); + SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count); + SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset); + raw_push_dos_date3(tree->session->transport, + req->out.vwv, VWV(4), parms->writeclose.in.mtime); + SCVAL(req->out.data, 0, 0); + if (parms->writeclose.in.count > 0) { + memcpy(req->out.data+1, parms->writeclose.in.data, + parms->writeclose.in.count); + } + break; + + case RAW_WRITE_WRITEX: + if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) { + bigoffset = true; + } + SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count); + SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE); + SSVAL(req->out.vwv, VWV(1), 0); + SSVAL(req->out.vwv, VWV(2), parms->writex.in.file.fnum); + SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset); + SIVAL(req->out.vwv, VWV(5), 0); /* reserved */ + SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode); + SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining); + SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16); + SSVAL(req->out.vwv, VWV(10), parms->writex.in.count); + SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr)); + if (bigoffset) { + SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32); + } + if (parms->writex.in.count > 0) { + memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count); + } + break; + + case RAW_WRITE_SPLWRITE: + SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count); + SSVAL(req->out.vwv, VWV(0), parms->splwrite.in.file.fnum); + if (parms->splwrite.in.count > 0) { + memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count); + } + break; + + case RAW_WRITE_SMB2: + return NULL; + } + + if (!smbcli_request_send(req)) { + smbcli_request_destroy(req); + return NULL; + } + + return req; +} + + +/**************************************************************************** + raw write interface (async recv) +****************************************************************************/ +_PUBLIC_ NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms) +{ + if (!smbcli_request_receive(req) || + !NT_STATUS_IS_OK(req->status)) { + goto failed; + } + + switch (parms->generic.level) { + case RAW_WRITE_WRITEUNLOCK: + SMBCLI_CHECK_WCT(req, 1); + parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0)); + break; + case RAW_WRITE_WRITE: + SMBCLI_CHECK_WCT(req, 1); + parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0)); + break; + case RAW_WRITE_WRITECLOSE: + SMBCLI_CHECK_WCT(req, 1); + parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0)); + break; + case RAW_WRITE_WRITEX: + SMBCLI_CHECK_WCT(req, 6); + parms->writex.out.nwritten = SVAL(req->in.vwv, VWV(2)); + parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16); + parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3)); + break; + case RAW_WRITE_SPLWRITE: + break; + case RAW_WRITE_SMB2: + req->status = NT_STATUS_INTERNAL_ERROR; + break; + } + +failed: + return smbcli_request_destroy(req); +} + +/**************************************************************************** + raw write interface (sync interface) +****************************************************************************/ +_PUBLIC_ NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms) +{ + struct smbcli_request *req = smb_raw_write_send(tree, parms); + return smb_raw_write_recv(req, parms); +} |