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Diffstat (limited to '')
| -rw-r--r-- | source4/smb_server/smb/nttrans.c | 815 |
1 files changed, 815 insertions, 0 deletions
diff --git a/source4/smb_server/smb/nttrans.c b/source4/smb_server/smb/nttrans.c new file mode 100644 index 0000000..8e4d004 --- /dev/null +++ b/source4/smb_server/smb/nttrans.c @@ -0,0 +1,815 @@ +/* + Unix SMB/CIFS implementation. + NT transaction handling + Copyright (C) Andrew Tridgell 2003 + Copyright (C) James J Myers 2003 <myersjj@samba.org> + + 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/>. +*/ +/* + This file handles the parsing of transact2 requests +*/ + +#include "includes.h" +#include "smb_server/smb_server.h" +#include "ntvfs/ntvfs.h" +#include "libcli/raw/libcliraw.h" +#include "libcli/raw/raw_proto.h" +#include "librpc/gen_ndr/ndr_security.h" + +/* + hold the state of a nttrans op while in progress. Needed to allow for async backend + functions. +*/ +struct nttrans_op { + struct smb_nttrans *trans; + NTSTATUS (*send_fn)(struct nttrans_op *); + void *op_info; +}; + + +/* setup a nttrans reply, given the data and params sizes */ +static NTSTATUS nttrans_setup_reply(struct nttrans_op *op, + struct smb_nttrans *trans, + uint32_t param_size, uint32_t data_size, + uint8_t setup_count) +{ + trans->out.setup_count = setup_count; + if (setup_count != 0) { + trans->out.setup = talloc_zero_array(op, uint8_t, setup_count*2); + NT_STATUS_HAVE_NO_MEMORY(trans->out.setup); + } + trans->out.params = data_blob_talloc(op, NULL, param_size); + if (param_size != 0) { + NT_STATUS_HAVE_NO_MEMORY(trans->out.params.data); + } + trans->out.data = data_blob_talloc(op, NULL, data_size); + if (data_size != 0) { + NT_STATUS_HAVE_NO_MEMORY(trans->out.data.data); + } + return NT_STATUS_OK; +} + +/* + send a nttrans create reply +*/ +static NTSTATUS nttrans_create_send(struct nttrans_op *op) +{ + union smb_open *io = talloc_get_type(op->op_info, union smb_open); + uint8_t *params; + NTSTATUS status; + + status = nttrans_setup_reply(op, op->trans, 69, 0, 0); + NT_STATUS_NOT_OK_RETURN(status); + params = op->trans->out.params.data; + + SSVAL(params, 0, io->ntcreatex.out.oplock_level); + smbsrv_push_fnum(params, 2, io->ntcreatex.out.file.ntvfs); + SIVAL(params, 4, io->ntcreatex.out.create_action); + SIVAL(params, 8, 0); /* ea error offset */ + push_nttime(params, 12, io->ntcreatex.out.create_time); + push_nttime(params, 20, io->ntcreatex.out.access_time); + push_nttime(params, 28, io->ntcreatex.out.write_time); + push_nttime(params, 36, io->ntcreatex.out.change_time); + SIVAL(params, 44, io->ntcreatex.out.attrib); + SBVAL(params, 48, io->ntcreatex.out.alloc_size); + SBVAL(params, 56, io->ntcreatex.out.size); + SSVAL(params, 64, io->ntcreatex.out.file_type); + SSVAL(params, 66, io->ntcreatex.out.ipc_state); + SCVAL(params, 68, io->ntcreatex.out.is_directory); + + return NT_STATUS_OK; +} + +/* + parse NTTRANS_CREATE request + */ +static NTSTATUS nttrans_create(struct smbsrv_request *req, + struct nttrans_op *op) +{ + struct smb_nttrans *trans = op->trans; + union smb_open *io; + uint16_t fname_len; + uint32_t sd_length, ea_length; + NTSTATUS status; + uint8_t *params; + enum ndr_err_code ndr_err; + + if (trans->in.params.length < 54) { + return NT_STATUS_INVALID_PARAMETER; + } + + /* parse the request */ + io = talloc(op, union smb_open); + NT_STATUS_HAVE_NO_MEMORY(io); + + io->ntcreatex.level = RAW_OPEN_NTTRANS_CREATE; + + params = trans->in.params.data; + + io->ntcreatex.in.flags = IVAL(params, 0); + io->ntcreatex.in.root_fid.ntvfs = smbsrv_pull_fnum(req, params, 4); + io->ntcreatex.in.access_mask = IVAL(params, 8); + io->ntcreatex.in.alloc_size = BVAL(params, 12); + io->ntcreatex.in.file_attr = IVAL(params, 20); + io->ntcreatex.in.share_access = IVAL(params, 24); + io->ntcreatex.in.open_disposition = IVAL(params, 28); + io->ntcreatex.in.create_options = IVAL(params, 32); + sd_length = IVAL(params, 36); + ea_length = IVAL(params, 40); + fname_len = IVAL(params, 44); + io->ntcreatex.in.impersonation = IVAL(params, 48); + io->ntcreatex.in.security_flags = CVAL(params, 52); + io->ntcreatex.in.sec_desc = NULL; + io->ntcreatex.in.ea_list = NULL; + io->ntcreatex.in.query_maximal_access = false; + io->ntcreatex.in.query_on_disk_id = false; + io->ntcreatex.in.private_flags = 0; + + req_pull_string(&req->in.bufinfo, &io->ntcreatex.in.fname, + params + 53, + MIN(fname_len+1, trans->in.params.length - 53), + STR_NO_RANGE_CHECK | STR_TERMINATE); + if (!io->ntcreatex.in.fname) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (sd_length > trans->in.data.length || + ea_length > trans->in.data.length || + (sd_length+ea_length) > trans->in.data.length) { + return NT_STATUS_INVALID_PARAMETER; + } + + /* this call has an optional security descriptor */ + if (sd_length != 0) { + DATA_BLOB blob; + blob.data = trans->in.data.data; + blob.length = sd_length; + io->ntcreatex.in.sec_desc = talloc(io, struct security_descriptor); + if (io->ntcreatex.in.sec_desc == NULL) { + return NT_STATUS_NO_MEMORY; + } + ndr_err = ndr_pull_struct_blob(&blob, io, + io->ntcreatex.in.sec_desc, + (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + } + + /* and an optional ea_list */ + if (ea_length > 4) { + DATA_BLOB blob; + blob.data = trans->in.data.data + sd_length; + blob.length = ea_length; + io->ntcreatex.in.ea_list = talloc(io, struct smb_ea_list); + if (io->ntcreatex.in.ea_list == NULL) { + return NT_STATUS_NO_MEMORY; + } + + status = ea_pull_list_chained(&blob, io, + &io->ntcreatex.in.ea_list->num_eas, + &io->ntcreatex.in.ea_list->eas); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + } + + op->send_fn = nttrans_create_send; + op->op_info = io; + + return ntvfs_open(req->ntvfs, io); +} + + +/* + send NTTRANS_QUERY_SEC_DESC reply + */ +static NTSTATUS nttrans_query_sec_desc_send(struct nttrans_op *op) +{ + union smb_fileinfo *io = talloc_get_type(op->op_info, union smb_fileinfo); + uint8_t *params; + NTSTATUS status; + enum ndr_err_code ndr_err; + + status = nttrans_setup_reply(op, op->trans, 4, 0, 0); + NT_STATUS_NOT_OK_RETURN(status); + params = op->trans->out.params.data; + + ndr_err = ndr_push_struct_blob(&op->trans->out.data, op, + io->query_secdesc.out.sd, + (ndr_push_flags_fn_t)ndr_push_security_descriptor); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + SIVAL(params, 0, op->trans->out.data.length); + + return NT_STATUS_OK; +} + +/* + parse NTTRANS_QUERY_SEC_DESC request + */ +static NTSTATUS nttrans_query_sec_desc(struct smbsrv_request *req, + struct nttrans_op *op) +{ + struct smb_nttrans *trans = op->trans; + union smb_fileinfo *io; + + if (trans->in.params.length < 8) { + return NT_STATUS_INVALID_PARAMETER; + } + + /* parse the request */ + io = talloc(op, union smb_fileinfo); + NT_STATUS_HAVE_NO_MEMORY(io); + + io->query_secdesc.level = RAW_FILEINFO_SEC_DESC; + io->query_secdesc.in.file.ntvfs = smbsrv_pull_fnum(req, trans->in.params.data, 0); + io->query_secdesc.in.secinfo_flags = IVAL(trans->in.params.data, 4); + + op->op_info = io; + op->send_fn = nttrans_query_sec_desc_send; + + SMBSRV_CHECK_FILE_HANDLE_NTSTATUS(io->query_secdesc.in.file.ntvfs); + return ntvfs_qfileinfo(req->ntvfs, io); +} + + +/* + parse NTTRANS_SET_SEC_DESC request + */ +static NTSTATUS nttrans_set_sec_desc(struct smbsrv_request *req, + struct nttrans_op *op) +{ + struct smb_nttrans *trans = op->trans; + union smb_setfileinfo *io; + enum ndr_err_code ndr_err; + + if (trans->in.params.length < 8) { + return NT_STATUS_INVALID_PARAMETER; + } + + /* parse the request */ + io = talloc(req, union smb_setfileinfo); + NT_STATUS_HAVE_NO_MEMORY(io); + + io->set_secdesc.level = RAW_SFILEINFO_SEC_DESC; + io->set_secdesc.in.file.ntvfs = smbsrv_pull_fnum(req, trans->in.params.data, 0); + io->set_secdesc.in.secinfo_flags = IVAL(trans->in.params.data, 4); + + io->set_secdesc.in.sd = talloc(io, struct security_descriptor); + NT_STATUS_HAVE_NO_MEMORY(io->set_secdesc.in.sd); + + ndr_err = ndr_pull_struct_blob(&trans->in.data, req, + io->set_secdesc.in.sd, + (ndr_pull_flags_fn_t)ndr_pull_security_descriptor); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + SMBSRV_CHECK_FILE_HANDLE_NTSTATUS(io->set_secdesc.in.file.ntvfs); + return ntvfs_setfileinfo(req->ntvfs, io); +} + + +/* parse NTTRANS_RENAME request + */ +static NTSTATUS nttrans_rename(struct smbsrv_request *req, + struct nttrans_op *op) +{ + struct smb_nttrans *trans = op->trans; + union smb_rename *io; + + if (trans->in.params.length < 5) { + return NT_STATUS_INVALID_PARAMETER; + } + + /* parse the request */ + io = talloc(req, union smb_rename); + NT_STATUS_HAVE_NO_MEMORY(io); + + io->nttrans.level = RAW_RENAME_NTTRANS; + io->nttrans.in.file.ntvfs = smbsrv_pull_fnum(req, trans->in.params.data, 0); + io->nttrans.in.flags = SVAL(trans->in.params.data, 2); + + smbsrv_blob_pull_string(&req->in.bufinfo, &trans->in.params, 4, + &io->nttrans.in.new_name, + STR_TERMINATE); + if (!io->nttrans.in.new_name) { + return NT_STATUS_INVALID_PARAMETER; + } + + SMBSRV_CHECK_FILE_HANDLE_NTSTATUS(io->nttrans.in.file.ntvfs); + return ntvfs_rename(req->ntvfs, io); +} + +/* + parse NTTRANS_IOCTL send + */ +static NTSTATUS nttrans_ioctl_send(struct nttrans_op *op) +{ + union smb_ioctl *info = talloc_get_type(op->op_info, union smb_ioctl); + NTSTATUS status; + + /* + * we pass 0 as data_count here, + * because we reuse the DATA_BLOB from the smb_ioctl + * struct + */ + status = nttrans_setup_reply(op, op->trans, 0, 0, 1); + NT_STATUS_NOT_OK_RETURN(status); + + op->trans->out.setup[0] = 0; + op->trans->out.data = info->ntioctl.out.blob; + + return NT_STATUS_OK; +} + + +/* + parse NTTRANS_IOCTL request + */ +static NTSTATUS nttrans_ioctl(struct smbsrv_request *req, + struct nttrans_op *op) +{ + struct smb_nttrans *trans = op->trans; + union smb_ioctl *nt; + + /* should have at least 4 setup words */ + if (trans->in.setup_count != 4) { + return NT_STATUS_INVALID_PARAMETER; + } + + nt = talloc(op, union smb_ioctl); + NT_STATUS_HAVE_NO_MEMORY(nt); + + nt->ntioctl.level = RAW_IOCTL_NTIOCTL; + nt->ntioctl.in.function = IVAL(trans->in.setup, 0); + nt->ntioctl.in.file.ntvfs = smbsrv_pull_fnum(req, (uint8_t *)trans->in.setup, 4); + nt->ntioctl.in.fsctl = CVAL(trans->in.setup, 6); + nt->ntioctl.in.filter = CVAL(trans->in.setup, 7); + nt->ntioctl.in.max_data = trans->in.max_data; + nt->ntioctl.in.blob = trans->in.data; + + op->op_info = nt; + op->send_fn = nttrans_ioctl_send; + + SMBSRV_CHECK_FILE_HANDLE_NTSTATUS(nt->ntioctl.in.file.ntvfs); + return ntvfs_ioctl(req->ntvfs, nt); +} + + +/* + send NTTRANS_NOTIFY_CHANGE reply + */ +static NTSTATUS nttrans_notify_change_send(struct nttrans_op *op) +{ + union smb_notify *info = talloc_get_type(op->op_info, union smb_notify); + size_t size = 0; + int i; + NTSTATUS status; + uint8_t *p; +#define MAX_BYTES_PER_CHAR 3 + + /* work out how big the reply buffer could be */ + for (i=0;i<info->nttrans.out.num_changes;i++) { + size += 12 + 3 + (1+strlen(info->nttrans.out.changes[i].name.s)) * MAX_BYTES_PER_CHAR; + } + + status = nttrans_setup_reply(op, op->trans, size, 0, 0); + NT_STATUS_NOT_OK_RETURN(status); + p = op->trans->out.params.data; + + /* construct the changes buffer */ + for (i=0;i<info->nttrans.out.num_changes;i++) { + uint32_t ofs; + ssize_t len; + + SIVAL(p, 4, info->nttrans.out.changes[i].action); + len = push_string(p + 12, info->nttrans.out.changes[i].name.s, + op->trans->out.params.length - + (p+12 - op->trans->out.params.data), STR_UNICODE); + SIVAL(p, 8, len); + + ofs = len + 12; + + if (ofs & 3) { + int pad = 4 - (ofs & 3); + memset(p+ofs, 0, pad); + ofs += pad; + } + + if (i == info->nttrans.out.num_changes-1) { + SIVAL(p, 0, 0); + } else { + SIVAL(p, 0, ofs); + } + + p += ofs; + } + + op->trans->out.params.length = p - op->trans->out.params.data; + + return NT_STATUS_OK; +} + +/* + parse NTTRANS_NOTIFY_CHANGE request + */ +static NTSTATUS nttrans_notify_change(struct smbsrv_request *req, + struct nttrans_op *op) +{ + struct smb_nttrans *trans = op->trans; + union smb_notify *info; + + /* should have at least 4 setup words */ + if (trans->in.setup_count != 4) { + return NT_STATUS_INVALID_PARAMETER; + } + + info = talloc(op, union smb_notify); + NT_STATUS_HAVE_NO_MEMORY(info); + + info->nttrans.level = RAW_NOTIFY_NTTRANS; + info->nttrans.in.completion_filter = IVAL(trans->in.setup, 0); + info->nttrans.in.file.ntvfs = smbsrv_pull_fnum(req, (uint8_t *)trans->in.setup, 4); + info->nttrans.in.recursive = SVAL(trans->in.setup, 6); + info->nttrans.in.buffer_size = trans->in.max_param; + + op->op_info = info; + op->send_fn = nttrans_notify_change_send; + + SMBSRV_CHECK_FILE_HANDLE_NTSTATUS(info->nttrans.in.file.ntvfs); + return ntvfs_notify(req->ntvfs, info); +} + +/* + backend for nttrans requests +*/ +static NTSTATUS nttrans_backend(struct smbsrv_request *req, + struct nttrans_op *op) +{ + /* the nttrans command is in function */ + switch (op->trans->in.function) { + case NT_TRANSACT_CREATE: + return nttrans_create(req, op); + case NT_TRANSACT_IOCTL: + return nttrans_ioctl(req, op); + case NT_TRANSACT_RENAME: + return nttrans_rename(req, op); + case NT_TRANSACT_QUERY_SECURITY_DESC: + return nttrans_query_sec_desc(req, op); + case NT_TRANSACT_SET_SECURITY_DESC: + return nttrans_set_sec_desc(req, op); + case NT_TRANSACT_NOTIFY_CHANGE: + return nttrans_notify_change(req, op); + } + + /* an unknown nttrans command */ + return NT_STATUS_DOS(ERRSRV, ERRerror); +} + + +static void reply_nttrans_send(struct ntvfs_request *ntvfs) +{ + struct smbsrv_request *req; + uint32_t params_left, data_left; + uint8_t *params, *data; + struct smb_nttrans *trans; + struct nttrans_op *op; + + SMBSRV_CHECK_ASYNC_STATUS(op, struct nttrans_op); + + trans = op->trans; + + /* if this function needs work to form the nttrans reply buffer, then + call that now */ + if (op->send_fn != NULL) { + NTSTATUS status; + status = op->send_fn(op); + if (!NT_STATUS_IS_OK(status)) { + smbsrv_send_error(req, status); + return; + } + } + + smbsrv_setup_reply(req, 18 + trans->out.setup_count, 0); + + /* note that we don't check the max_setup count (matching w2k3 + behaviour) */ + + if (trans->out.params.length > trans->in.max_param) { + smbsrv_setup_error(req, NT_STATUS_BUFFER_TOO_SMALL); + trans->out.params.length = trans->in.max_param; + } + if (trans->out.data.length > trans->in.max_data) { + smbsrv_setup_error(req, NT_STATUS_BUFFER_TOO_SMALL); + trans->out.data.length = trans->in.max_data; + } + + params_left = trans->out.params.length; + data_left = trans->out.data.length; + params = trans->out.params.data; + data = trans->out.data.data; + + /* we need to divide up the reply into chunks that fit into + the negotiated buffer size */ + do { + uint32_t this_data, this_param, max_bytes; + unsigned int align1 = 1, align2 = (params_left ? 2 : 0); + struct smbsrv_request *this_req; + + max_bytes = req_max_data(req) - (align1 + align2); + + this_param = params_left; + if (this_param > max_bytes) { + this_param = max_bytes; + } + max_bytes -= this_param; + + this_data = data_left; + if (this_data > max_bytes) { + this_data = max_bytes; + } + + /* don't destroy unless this is the last chunk */ + if (params_left - this_param != 0 || + data_left - this_data != 0) { + this_req = smbsrv_setup_secondary_request(req); + } else { + this_req = req; + } + + req_grow_data(this_req, this_param + this_data + (align1 + align2)); + + SSVAL(this_req->out.vwv, 0, 0); /* reserved */ + SCVAL(this_req->out.vwv, 2, 0); /* reserved */ + SIVAL(this_req->out.vwv, 3, trans->out.params.length); + SIVAL(this_req->out.vwv, 7, trans->out.data.length); + + SIVAL(this_req->out.vwv, 11, this_param); + SIVAL(this_req->out.vwv, 15, align1 + PTR_DIFF(this_req->out.data, this_req->out.hdr)); + SIVAL(this_req->out.vwv, 19, PTR_DIFF(params, trans->out.params.data)); + + SIVAL(this_req->out.vwv, 23, this_data); + SIVAL(this_req->out.vwv, 27, align1 + align2 + + PTR_DIFF(this_req->out.data + this_param, this_req->out.hdr)); + SIVAL(this_req->out.vwv, 31, PTR_DIFF(data, trans->out.data.data)); + + SCVAL(this_req->out.vwv, 35, trans->out.setup_count); + if (trans->out.setup_count > 0) { + memcpy((char *)(this_req->out.vwv) + VWV(18), + trans->out.setup, + sizeof(uint16_t) * trans->out.setup_count); + } + memset(this_req->out.data, 0, align1); + if (this_param != 0) { + memcpy(this_req->out.data + align1, params, this_param); + } + memset(this_req->out.data+this_param+align1, 0, align2); + if (this_data != 0) { + memcpy(this_req->out.data+this_param+align1+align2, + data, this_data); + } + + params_left -= this_param; + data_left -= this_data; + params += this_param; + data += this_data; + + smbsrv_send_reply(this_req); + } while (params_left != 0 || data_left != 0); +} + +/* + send a continue request +*/ +static void reply_nttrans_continue(struct smbsrv_request *req, struct smb_nttrans *trans) +{ + struct smbsrv_request *req2; + struct smbsrv_trans_partial *tp; + int count; + + /* make sure they don't flood us */ + for (count=0,tp=req->smb_conn->trans_partial;tp;tp=tp->next) count++; + if (count > 100) { + smbsrv_send_error(req, NT_STATUS_INSUFFICIENT_RESOURCES); + return; + } + + tp = talloc(req, struct smbsrv_trans_partial); + + tp->req = req; + tp->u.nttrans = trans; + tp->command = SMBnttrans; + + DLIST_ADD(req->smb_conn->trans_partial, tp); + talloc_set_destructor(tp, smbsrv_trans_partial_destructor); + + req2 = smbsrv_setup_secondary_request(req); + + /* send a 'please continue' reply */ + smbsrv_setup_reply(req2, 0, 0); + smbsrv_send_reply(req2); +} + + +/* + answer a reconstructed trans request +*/ +static void reply_nttrans_complete(struct smbsrv_request *req, struct smb_nttrans *trans) +{ + struct nttrans_op *op; + + SMBSRV_TALLOC_IO_PTR(op, struct nttrans_op); + SMBSRV_SETUP_NTVFS_REQUEST(reply_nttrans_send, NTVFS_ASYNC_STATE_MAY_ASYNC); + + op->trans = trans; + op->op_info = NULL; + op->send_fn = NULL; + + /* its a full request, give it to the backend */ + ZERO_STRUCT(trans->out); + SMBSRV_CALL_NTVFS_BACKEND(nttrans_backend(req, op)); +} + + +/**************************************************************************** + Reply to an SMBnttrans request +****************************************************************************/ +void smbsrv_reply_nttrans(struct smbsrv_request *req) +{ + struct smb_nttrans *trans; + uint32_t param_ofs, data_ofs; + uint32_t param_count, data_count; + uint32_t param_total, data_total; + + /* parse request */ + if (req->in.wct < 19) { + smbsrv_send_error(req, NT_STATUS_FOOBAR); + return; + } + + trans = talloc(req, struct smb_nttrans); + if (trans == NULL) { + smbsrv_send_error(req, NT_STATUS_NO_MEMORY); + return; + } + + trans->in.max_setup = CVAL(req->in.vwv, 0); + param_total = IVAL(req->in.vwv, 3); + data_total = IVAL(req->in.vwv, 7); + trans->in.max_param = IVAL(req->in.vwv, 11); + trans->in.max_data = IVAL(req->in.vwv, 15); + param_count = IVAL(req->in.vwv, 19); + param_ofs = IVAL(req->in.vwv, 23); + data_count = IVAL(req->in.vwv, 27); + data_ofs = IVAL(req->in.vwv, 31); + trans->in.setup_count= CVAL(req->in.vwv, 35); + trans->in.function = SVAL(req->in.vwv, 36); + + if (req->in.wct != 19 + trans->in.setup_count) { + smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror)); + return; + } + + /* parse out the setup words */ + trans->in.setup = talloc_array(req, uint8_t, trans->in.setup_count*2); + if (!trans->in.setup) { + smbsrv_send_error(req, NT_STATUS_NO_MEMORY); + return; + } + memcpy(trans->in.setup, (char *)(req->in.vwv) + VWV(19), + sizeof(uint16_t) * trans->in.setup_count); + + if (!req_pull_blob(&req->in.bufinfo, req->in.hdr + param_ofs, param_count, &trans->in.params) || + !req_pull_blob(&req->in.bufinfo, req->in.hdr + data_ofs, data_count, &trans->in.data)) { + smbsrv_send_error(req, NT_STATUS_FOOBAR); + return; + } + + /* is it a partial request? if so, then send a 'send more' message */ + if (param_total > param_count || data_total > data_count) { + reply_nttrans_continue(req, trans); + return; + } + + reply_nttrans_complete(req, trans); +} + + +/**************************************************************************** + Reply to an SMBnttranss request +****************************************************************************/ +void smbsrv_reply_nttranss(struct smbsrv_request *req) +{ + struct smbsrv_trans_partial *tp; + struct smb_nttrans *trans = NULL; + uint32_t param_ofs, data_ofs; + uint32_t param_count, data_count; + uint32_t param_disp, data_disp; + uint32_t param_total, data_total; + DATA_BLOB params, data; + + /* parse request */ + if (req->in.wct != 18) { + smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror)); + return; + } + + for (tp=req->smb_conn->trans_partial;tp;tp=tp->next) { + if (tp->command == SMBnttrans && + SVAL(tp->req->in.hdr, HDR_MID) == SVAL(req->in.hdr, HDR_MID)) { +/* TODO: check the VUID, PID and TID too? */ + break; + } + } + + if (tp == NULL) { + smbsrv_send_error(req, NT_STATUS_INVALID_PARAMETER); + return; + } + + trans = tp->u.nttrans; + + param_total = IVAL(req->in.vwv, 3); + data_total = IVAL(req->in.vwv, 7); + param_count = IVAL(req->in.vwv, 11); + param_ofs = IVAL(req->in.vwv, 15); + param_disp = IVAL(req->in.vwv, 19); + data_count = IVAL(req->in.vwv, 23); + data_ofs = IVAL(req->in.vwv, 27); + data_disp = IVAL(req->in.vwv, 31); + + if (!req_pull_blob(&req->in.bufinfo, req->in.hdr + param_ofs, param_count, ¶ms) || + !req_pull_blob(&req->in.bufinfo, req->in.hdr + data_ofs, data_count, &data)) { + smbsrv_send_error(req, NT_STATUS_INVALID_PARAMETER); + return; + } + + /* only allow contiguous requests */ + if ((param_count != 0 && + param_disp != trans->in.params.length) || + (data_count != 0 && + data_disp != trans->in.data.length)) { + smbsrv_send_error(req, NT_STATUS_INVALID_PARAMETER); + return; + } + + /* add to the existing request */ + if (param_count != 0) { + trans->in.params.data = talloc_realloc(trans, + trans->in.params.data, + uint8_t, + param_disp + param_count); + if (trans->in.params.data == NULL) { + smbsrv_send_error(tp->req, NT_STATUS_NO_MEMORY); + return; + } + trans->in.params.length = param_disp + param_count; + } + + if (data_count != 0) { + trans->in.data.data = talloc_realloc(trans, + trans->in.data.data, + uint8_t, + data_disp + data_count); + if (trans->in.data.data == NULL) { + smbsrv_send_error(tp->req, NT_STATUS_NO_MEMORY); + return; + } + trans->in.data.length = data_disp + data_count; + } + + memcpy(trans->in.params.data + param_disp, params.data, params.length); + memcpy(trans->in.data.data + data_disp, data.data, data.length); + + /* the sequence number of the reply is taken from the last secondary + response */ + tp->req->seq_num = req->seq_num; + + /* we don't reply to Transs2 requests */ + talloc_free(req); + + if (trans->in.params.length == param_total && + trans->in.data.length == data_total) { + /* its now complete */ + req = tp->req; + talloc_free(tp); + reply_nttrans_complete(req, trans); + } + return; +} |