diff options
Diffstat (limited to 'source4/smb_server/smb/request.c')
| -rw-r--r-- | source4/smb_server/smb/request.c | 779 |
1 files changed, 779 insertions, 0 deletions
diff --git a/source4/smb_server/smb/request.c b/source4/smb_server/smb/request.c new file mode 100644 index 0000000..0f3171f --- /dev/null +++ b/source4/smb_server/smb/request.c @@ -0,0 +1,779 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Andrew Tridgell 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/>. +*/ + +/* + this file implements functions for manipulating the 'struct smbsrv_request' structure in smbd +*/ + +#include "includes.h" +#include "smb_server/smb_server.h" +#include "samba/service_stream.h" +#include "lib/stream/packet.h" +#include "ntvfs/ntvfs.h" + + +/* we over allocate the data buffer to prevent too many realloc calls */ +#define REQ_OVER_ALLOCATION 0 + +/* setup the bufinfo used for strings and range checking */ +void smbsrv_setup_bufinfo(struct smbsrv_request *req) +{ + req->in.bufinfo.mem_ctx = req; + req->in.bufinfo.flags = 0; + if (req->flags2 & FLAGS2_UNICODE_STRINGS) { + req->in.bufinfo.flags |= BUFINFO_FLAG_UNICODE; + } + req->in.bufinfo.align_base = req->in.buffer; + req->in.bufinfo.data = req->in.data; + req->in.bufinfo.data_size = req->in.data_size; +} + + +static int smbsrv_request_destructor(struct smbsrv_request *req) +{ + DLIST_REMOVE(req->smb_conn->requests, req); + return 0; +} + +/**************************************************************************** +construct a basic request packet, mostly used to construct async packets +such as change notify and oplock break requests +****************************************************************************/ +struct smbsrv_request *smbsrv_init_request(struct smbsrv_connection *smb_conn) +{ + struct smbsrv_request *req; + + req = talloc_zero(smb_conn, struct smbsrv_request); + if (!req) { + return NULL; + } + + /* setup the request context */ + req->smb_conn = smb_conn; + + talloc_set_destructor(req, smbsrv_request_destructor); + + return req; +} + + +/* + setup a chained reply in req->out with the given word count and initial data buffer size. +*/ +static void req_setup_chain_reply(struct smbsrv_request *req, unsigned int wct, unsigned int buflen) +{ + uint32_t chain_base_size = req->out.size; + + /* we need room for the wct value, the words, the buffer length and the buffer */ + req->out.size += 1 + VWV(wct) + 2 + buflen; + + /* over allocate by a small amount */ + req->out.allocated = req->out.size + REQ_OVER_ALLOCATION; + + req->out.buffer = talloc_realloc(req, req->out.buffer, + uint8_t, req->out.allocated); + if (!req->out.buffer) { + smbsrv_terminate_connection(req->smb_conn, "allocation failed"); + return; + } + + req->out.hdr = req->out.buffer + NBT_HDR_SIZE; + req->out.vwv = req->out.buffer + chain_base_size + 1; + req->out.wct = wct; + req->out.data = req->out.vwv + VWV(wct) + 2; + req->out.data_size = buflen; + req->out.ptr = req->out.data; + + SCVAL(req->out.buffer, chain_base_size, wct); + SSVAL(req->out.vwv, VWV(wct), buflen); +} + + +/* + setup a reply in req->out with the given word count and initial data buffer size. + the caller will then fill in the command words and data before calling req_send_reply() to + send the reply on its way +*/ +void smbsrv_setup_reply(struct smbsrv_request *req, unsigned int wct, size_t buflen) +{ + uint16_t flags2; + + if (req->chain_count != 0) { + req_setup_chain_reply(req, wct, buflen); + return; + } + + req->out.size = NBT_HDR_SIZE + MIN_SMB_SIZE + VWV(wct) + buflen; + + /* over allocate by a small amount */ + req->out.allocated = req->out.size + REQ_OVER_ALLOCATION; + + req->out.buffer = talloc_size(req, req->out.allocated); + if (!req->out.buffer) { + smbsrv_terminate_connection(req->smb_conn, "allocation failed"); + return; + } + + flags2 = FLAGS2_LONG_PATH_COMPONENTS | + FLAGS2_EXTENDED_ATTRIBUTES | + FLAGS2_IS_LONG_NAME; +#define _SMB_FLAGS2_ECHOED_FLAGS ( \ + FLAGS2_UNICODE_STRINGS | \ + FLAGS2_EXTENDED_SECURITY | \ + FLAGS2_SMB_SECURITY_SIGNATURES \ +) + flags2 |= (req->flags2 & _SMB_FLAGS2_ECHOED_FLAGS); + if (req->smb_conn->negotiate.client_caps & CAP_STATUS32) { + flags2 |= FLAGS2_32_BIT_ERROR_CODES; + } + + req->out.hdr = req->out.buffer + NBT_HDR_SIZE; + req->out.vwv = req->out.hdr + HDR_VWV; + req->out.wct = wct; + req->out.data = req->out.vwv + VWV(wct) + 2; + req->out.data_size = buflen; + req->out.ptr = req->out.data; + + SIVAL(req->out.hdr, HDR_RCLS, 0); + + SCVAL(req->out.hdr, HDR_WCT, wct); + SSVAL(req->out.vwv, VWV(wct), buflen); + + memcpy(req->out.hdr, "\377SMB", 4); + SCVAL(req->out.hdr,HDR_FLG, FLAG_REPLY | FLAG_CASELESS_PATHNAMES); + SSVAL(req->out.hdr,HDR_FLG2, flags2); + SSVAL(req->out.hdr,HDR_PIDHIGH,0); + memset(req->out.hdr + HDR_SS_FIELD, 0, 10); + + if (req->in.hdr) { + /* copy the cmd, tid, pid, uid and mid from the request */ + SCVAL(req->out.hdr,HDR_COM,CVAL(req->in.hdr,HDR_COM)); + SSVAL(req->out.hdr,HDR_TID,SVAL(req->in.hdr,HDR_TID)); + SSVAL(req->out.hdr,HDR_PID,SVAL(req->in.hdr,HDR_PID)); + SSVAL(req->out.hdr,HDR_UID,SVAL(req->in.hdr,HDR_UID)); + SSVAL(req->out.hdr,HDR_MID,SVAL(req->in.hdr,HDR_MID)); + } else { + SCVAL(req->out.hdr,HDR_COM,0); + SSVAL(req->out.hdr,HDR_TID,0); + SSVAL(req->out.hdr,HDR_PID,0); + SSVAL(req->out.hdr,HDR_UID,0); + SSVAL(req->out.hdr,HDR_MID,0); + } +} + + +/* + setup a copy of a request, used when the server needs to send + more than one reply for a single request packet +*/ +struct smbsrv_request *smbsrv_setup_secondary_request(struct smbsrv_request *old_req) +{ + struct smbsrv_request *req; + ptrdiff_t diff; + + req = talloc_memdup(old_req, old_req, sizeof(struct smbsrv_request)); + if (req == NULL) { + return NULL; + } + + req->out.buffer = talloc_memdup(req, req->out.buffer, req->out.allocated); + if (req->out.buffer == NULL) { + talloc_free(req); + return NULL; + } + + diff = req->out.buffer - old_req->out.buffer; + + req->out.hdr += diff; + req->out.vwv += diff; + req->out.data += diff; + req->out.ptr += diff; + + return req; +} + +/* + work out the maximum data size we will allow for this reply, given + the negotiated max_xmit. The basic reply packet must be setup before + this call + + note that this is deliberately a signed integer reply +*/ +int req_max_data(struct smbsrv_request *req) +{ + int ret; + ret = req->smb_conn->negotiate.max_send; + ret -= PTR_DIFF(req->out.data, req->out.hdr); + if (ret < 0) ret = 0; + return ret; +} + + +/* + grow the allocation of the data buffer portion of a reply + packet. Note that as this can reallocate the packet buffer this + invalidates any local pointers into the packet. + + To cope with this req->out.ptr is supplied. This will be updated to + point at the same offset into the packet as before this call +*/ +static void req_grow_allocation(struct smbsrv_request *req, unsigned int new_size) +{ + int delta; + uint8_t *buf2; + + delta = new_size - req->out.data_size; + if (delta + req->out.size <= req->out.allocated) { + /* it fits in the preallocation */ + return; + } + + /* we need to realloc */ + req->out.allocated = req->out.size + delta + REQ_OVER_ALLOCATION; + buf2 = talloc_realloc(req, req->out.buffer, uint8_t, req->out.allocated); + if (buf2 == NULL) { + smb_panic("out of memory in req_grow_allocation"); + } + + if (buf2 == req->out.buffer) { + /* the malloc library gave us the same pointer */ + return; + } + + /* update the pointers into the packet */ + req->out.data = buf2 + PTR_DIFF(req->out.data, req->out.buffer); + req->out.ptr = buf2 + PTR_DIFF(req->out.ptr, req->out.buffer); + req->out.vwv = buf2 + PTR_DIFF(req->out.vwv, req->out.buffer); + req->out.hdr = buf2 + PTR_DIFF(req->out.hdr, req->out.buffer); + + req->out.buffer = buf2; +} + + +/* + grow the data buffer portion of a reply packet. Note that as this + can reallocate the packet buffer this invalidates any local pointers + into the packet. + + To cope with this req->out.ptr is supplied. This will be updated to + point at the same offset into the packet as before this call +*/ +void req_grow_data(struct smbsrv_request *req, size_t new_size) +{ + int delta; + + if (!(req->control_flags & SMBSRV_REQ_CONTROL_LARGE) && new_size > req_max_data(req)) { + smb_panic("reply buffer too large!"); + } + + req_grow_allocation(req, new_size); + + delta = new_size - req->out.data_size; + + req->out.size += delta; + req->out.data_size += delta; + + /* set the BCC to the new data size */ + SSVAL(req->out.vwv, VWV(req->out.wct), new_size); +} + +/* + send a reply and destroy the request buffer + + note that this only looks at req->out.buffer and req->out.size, allowing manually + constructed packets to be sent +*/ +void smbsrv_send_reply_nosign(struct smbsrv_request *req) +{ + DATA_BLOB blob; + NTSTATUS status; + + if (req->smb_conn->connection->event.fde == NULL) { + /* we are in the process of shutting down this connection */ + talloc_free(req); + return; + } + + if (req->out.size > NBT_HDR_SIZE) { + _smb_setlen_nbt(req->out.buffer, req->out.size - NBT_HDR_SIZE); + } + + blob = data_blob_const(req->out.buffer, req->out.size); + status = packet_send(req->smb_conn->packet, blob); + if (!NT_STATUS_IS_OK(status)) { + smbsrv_terminate_connection(req->smb_conn, nt_errstr(status)); + } + talloc_free(req); +} + +/* + possibly sign a message then send a reply and destroy the request buffer + + note that this only looks at req->out.buffer and req->out.size, allowing manually + constructed packets to be sent +*/ +void smbsrv_send_reply(struct smbsrv_request *req) +{ + if (req->smb_conn->connection->event.fde == NULL) { + /* we are in the process of shutting down this connection */ + talloc_free(req); + return; + } + smbsrv_sign_packet(req); + + smbsrv_send_reply_nosign(req); +} + +/* + setup the header of a reply to include an NTSTATUS code +*/ +void smbsrv_setup_error(struct smbsrv_request *req, NTSTATUS status) +{ + if (!req->smb_conn->config.nt_status_support || !(req->smb_conn->negotiate.client_caps & CAP_STATUS32)) { + /* convert to DOS error codes */ + uint8_t eclass; + uint32_t ecode; + ntstatus_to_dos(status, &eclass, &ecode); + SCVAL(req->out.hdr, HDR_RCLS, eclass); + SSVAL(req->out.hdr, HDR_ERR, ecode); + SSVAL(req->out.hdr, HDR_FLG2, SVAL(req->out.hdr, HDR_FLG2) & ~FLAGS2_32_BIT_ERROR_CODES); + return; + } + + if (NT_STATUS_IS_DOS(status)) { + /* its a encoded DOS error, using the reserved range */ + SSVAL(req->out.hdr, HDR_RCLS, NT_STATUS_DOS_CLASS(status)); + SSVAL(req->out.hdr, HDR_ERR, NT_STATUS_DOS_CODE(status)); + SSVAL(req->out.hdr, HDR_FLG2, SVAL(req->out.hdr, HDR_FLG2) & ~FLAGS2_32_BIT_ERROR_CODES); + } else { + SIVAL(req->out.hdr, HDR_RCLS, NT_STATUS_V(status)); + SSVAL(req->out.hdr, HDR_FLG2, SVAL(req->out.hdr, HDR_FLG2) | FLAGS2_32_BIT_ERROR_CODES); + } +} + +/* + construct and send an error packet, then destroy the request + auto-converts to DOS error format when appropriate +*/ +void smbsrv_send_error(struct smbsrv_request *req, NTSTATUS status) +{ + if (req->smb_conn->connection->event.fde == NULL) { + /* the socket has been destroyed - no point trying to send an error! */ + talloc_free(req); + return; + } + smbsrv_setup_reply(req, 0, 0); + + /* error returns never have any data */ + req_grow_data(req, 0); + + smbsrv_setup_error(req, status); + smbsrv_send_reply(req); +} + + +/* + push a string into the data portion of the request packet, growing it if necessary + this gets quite tricky - please be very careful to cover all cases when modifying this + + if dest is NULL, then put the string at the end of the data portion of the packet + + if dest_len is -1 then no limit applies +*/ +size_t req_push_str(struct smbsrv_request *req, uint8_t *dest, const char *str, int dest_len, size_t flags) +{ + size_t len; + unsigned int grow_size; + uint8_t *buf0; + const int max_bytes_per_char = 3; + + if (!(flags & (STR_ASCII|STR_UNICODE))) { + flags |= (req->flags2 & FLAGS2_UNICODE_STRINGS) ? STR_UNICODE : STR_ASCII; + } + + if (dest == NULL) { + dest = req->out.data + req->out.data_size; + } + + if (dest_len != -1) { + len = dest_len; + } else { + len = (strlen(str)+2) * max_bytes_per_char; + } + + grow_size = len + PTR_DIFF(dest, req->out.data); + buf0 = req->out.buffer; + + req_grow_allocation(req, grow_size); + + if (buf0 != req->out.buffer) { + dest = req->out.buffer + PTR_DIFF(dest, buf0); + } + + len = push_string(dest, str, len, flags); + + grow_size = len + PTR_DIFF(dest, req->out.data); + + if (grow_size > req->out.data_size) { + req_grow_data(req, grow_size); + } + + return len; +} + +/* + append raw bytes into the data portion of the request packet + return the number of bytes added +*/ +size_t req_append_bytes(struct smbsrv_request *req, + const uint8_t *bytes, size_t byte_len) +{ + req_grow_allocation(req, byte_len + req->out.data_size); + memcpy(req->out.data + req->out.data_size, bytes, byte_len); + req_grow_data(req, byte_len + req->out.data_size); + return byte_len; +} +/* + append variable block (type 5 buffer) into the data portion of the request packet + return the number of bytes added +*/ +size_t req_append_var_block(struct smbsrv_request *req, + const uint8_t *bytes, uint16_t byte_len) +{ + req_grow_allocation(req, byte_len + 3 + req->out.data_size); + SCVAL(req->out.data + req->out.data_size, 0, 5); + SSVAL(req->out.data + req->out.data_size, 1, byte_len); /* add field length */ + if (byte_len > 0) { + memcpy(req->out.data + req->out.data_size + 3, bytes, byte_len); + } + req_grow_data(req, byte_len + 3 + req->out.data_size); + return byte_len + 3; +} +/** + pull a UCS2 string from a request packet, returning a talloced unix string + + the string length is limited by the 3 things: + - the data size in the request (end of packet) + - the passed 'byte_len' if it is not -1 + - the end of string (null termination) + + Note that 'byte_len' is the number of bytes in the packet + + on failure zero is returned and *dest is set to NULL, otherwise the number + of bytes consumed in the packet is returned +*/ +static size_t req_pull_ucs2(struct request_bufinfo *bufinfo, const char **dest, const uint8_t *src, int byte_len, unsigned int flags) +{ + int src_len, src_len2, alignment=0; + bool ret; + char *dest2; + size_t converted_size = 0; + + if (!(flags & STR_NOALIGN) && ucs2_align(bufinfo->align_base, src, flags)) { + src++; + alignment=1; + if (byte_len != -1) { + byte_len--; + } + } + + if (flags & STR_NO_RANGE_CHECK) { + src_len = byte_len; + } else { + src_len = bufinfo->data_size - PTR_DIFF(src, bufinfo->data); + if (byte_len != -1 && src_len > byte_len) { + src_len = byte_len; + } + } + + if (src_len < 0) { + *dest = NULL; + return 0; + } + + src_len2 = utf16_len_n(src, src_len); + if (src_len2 == 0) { + *dest = talloc_strdup(bufinfo->mem_ctx, ""); + return src_len2 + alignment; + } + + ret = convert_string_talloc(bufinfo->mem_ctx, CH_UTF16, CH_UNIX, src, src_len2, (void **)&dest2, &converted_size); + + if (!ret) { + *dest = NULL; + return 0; + } + *dest = dest2; + + return src_len2 + alignment; +} + +/** + pull a ascii string from a request packet, returning a talloced string + + the string length is limited by the 3 things: + - the data size in the request (end of packet) + - the passed 'byte_len' if it is not -1 + - the end of string (null termination) + + Note that 'byte_len' is the number of bytes in the packet + + on failure zero is returned and *dest is set to NULL, otherwise the number + of bytes consumed in the packet is returned +*/ +static size_t req_pull_ascii(struct request_bufinfo *bufinfo, const char **dest, const uint8_t *src, int byte_len, unsigned int flags) +{ + int src_len, src_len2; + bool ret; + char *dest2; + size_t converted_size = 0; + + if (flags & STR_NO_RANGE_CHECK) { + src_len = byte_len; + } else { + src_len = bufinfo->data_size - PTR_DIFF(src, bufinfo->data); + if (src_len < 0) { + *dest = NULL; + return 0; + } + if (byte_len != -1 && src_len > byte_len) { + src_len = byte_len; + } + } + + src_len2 = strnlen((const char *)src, src_len); + if (src_len2 <= src_len - 1) { + /* include the termination if we didn't reach the end of the packet */ + src_len2++; + } + + ret = convert_string_talloc(bufinfo->mem_ctx, CH_DOS, CH_UNIX, src, src_len2, (void **)&dest2, &converted_size); + + if (!ret) { + *dest = NULL; + return 0; + } + *dest = dest2; + + return src_len2; +} + +/** + pull a string from a request packet, returning a talloced string + + the string length is limited by the 3 things: + - the data size in the request (end of packet) + - the passed 'byte_len' if it is not -1 + - the end of string (null termination) + + Note that 'byte_len' is the number of bytes in the packet + + on failure zero is returned and *dest is set to NULL, otherwise the number + of bytes consumed in the packet is returned +*/ +size_t req_pull_string(struct request_bufinfo *bufinfo, const char **dest, const uint8_t *src, int byte_len, unsigned int flags) +{ + if (!(flags & STR_ASCII) && + (((flags & STR_UNICODE) || (bufinfo->flags & BUFINFO_FLAG_UNICODE)))) { + return req_pull_ucs2(bufinfo, dest, src, byte_len, flags); + } + + return req_pull_ascii(bufinfo, dest, src, byte_len, flags); +} + + +/** + pull a ASCII4 string buffer from a request packet, returning a talloced string + + an ASCII4 buffer is a null terminated string that has a prefix + of the character 0x4. It tends to be used in older parts of the protocol. + + on failure *dest is set to the zero length string. This seems to + match win2000 behaviour +*/ +size_t req_pull_ascii4(struct request_bufinfo *bufinfo, const char **dest, const uint8_t *src, unsigned int flags) +{ + ssize_t ret; + + if (PTR_DIFF(src, bufinfo->data) + 1 > bufinfo->data_size) { + /* win2000 treats this as the empty string! */ + (*dest) = talloc_strdup(bufinfo->mem_ctx, ""); + return 0; + } + + /* this consumes the 0x4 byte. We don't check whether the byte + is actually 0x4 or not. This matches win2000 server + behaviour */ + src++; + + ret = req_pull_string(bufinfo, dest, src, -1, flags); + if (ret == -1) { + (*dest) = talloc_strdup(bufinfo->mem_ctx, ""); + return 1; + } + + return ret + 1; +} + +/** + pull a DATA_BLOB from a request packet, returning a talloced blob + + return false if any part is outside the data portion of the packet +*/ +bool req_pull_blob(struct request_bufinfo *bufinfo, const uint8_t *src, int len, DATA_BLOB *blob) +{ + if (len != 0 && req_data_oob(bufinfo, src, len)) { + return false; + } + + (*blob) = data_blob_talloc(bufinfo->mem_ctx, src, len); + + return true; +} + +/* check that a lump of data in a request is within the bounds of the data section of + the packet */ +bool req_data_oob(struct request_bufinfo *bufinfo, const uint8_t *ptr, uint32_t count) +{ + if (count == 0) { + return false; + } + + /* be careful with wraparound! */ + if ((uintptr_t)ptr < (uintptr_t)bufinfo->data || + (uintptr_t)ptr >= (uintptr_t)bufinfo->data + bufinfo->data_size || + count > bufinfo->data_size || + (uintptr_t)ptr + count > (uintptr_t)bufinfo->data + bufinfo->data_size) { + return true; + } + return false; +} + + +/* + pull an open file handle from a packet, taking account of the chained_fnum +*/ +static uint16_t req_fnum(struct smbsrv_request *req, const uint8_t *base, unsigned int offset) +{ + if (req->chained_fnum != -1) { + return req->chained_fnum; + } + return SVAL(base, offset); +} + +struct ntvfs_handle *smbsrv_pull_fnum(struct smbsrv_request *req, const uint8_t *base, unsigned int offset) +{ + struct smbsrv_handle *handle; + uint16_t fnum = req_fnum(req, base, offset); + + handle = smbsrv_smb_handle_find(req->tcon, fnum, req->request_time); + if (!handle) { + return NULL; + } + + /* + * For SMB tcons and sessions can be mixed! + * But we need to make sure that file handles + * are only accessed by the opening session! + * + * So check if the handle is valid for the given session! + */ + if (handle->session != req->session) { + return NULL; + } + + return handle->ntvfs; +} + +void smbsrv_push_fnum(uint8_t *base, unsigned int offset, struct ntvfs_handle *ntvfs) +{ + struct smbsrv_handle *handle = talloc_get_type(ntvfs->frontend_data.private_data, + struct smbsrv_handle); + SSVAL(base, offset, handle->hid); +} + +NTSTATUS smbsrv_handle_create_new(void *private_data, struct ntvfs_request *ntvfs, struct ntvfs_handle **_h) +{ + struct smbsrv_request *req = talloc_get_type(ntvfs->frontend_data.private_data, + struct smbsrv_request); + struct smbsrv_handle *handle; + struct ntvfs_handle *h; + + handle = smbsrv_handle_new(req->session, req->tcon, req, req->request_time); + if (!handle) return NT_STATUS_INSUFFICIENT_RESOURCES; + + h = talloc_zero(handle, struct ntvfs_handle); + if (!h) goto nomem; + + /* + * note: we don't set handle->ntvfs yet, + * this will be done by smbsrv_handle_make_valid() + * this makes sure the handle is invalid for clients + * until the ntvfs subsystem has made it valid + */ + h->ctx = ntvfs->ctx; + h->session_info = ntvfs->session_info; + h->smbpid = ntvfs->smbpid; + + h->frontend_data.private_data = handle; + + *_h = h; + return NT_STATUS_OK; +nomem: + talloc_free(handle); + return NT_STATUS_NO_MEMORY; +} + +NTSTATUS smbsrv_handle_make_valid(void *private_data, struct ntvfs_handle *h) +{ + struct smbsrv_tcon *tcon = talloc_get_type(private_data, struct smbsrv_tcon); + struct smbsrv_handle *handle = talloc_get_type(h->frontend_data.private_data, + struct smbsrv_handle); + /* this tells the frontend that the handle is valid */ + handle->ntvfs = h; + /* this moves the smbsrv_request to the smbsrv_tcon memory context */ + talloc_steal(tcon, handle); + return NT_STATUS_OK; +} + +void smbsrv_handle_destroy(void *private_data, struct ntvfs_handle *h) +{ + struct smbsrv_handle *handle = talloc_get_type(h->frontend_data.private_data, + struct smbsrv_handle); + talloc_free(handle); +} + +struct ntvfs_handle *smbsrv_handle_search_by_wire_key(void *private_data, struct ntvfs_request *ntvfs, const DATA_BLOB *key) +{ + struct smbsrv_request *req = talloc_get_type(ntvfs->frontend_data.private_data, + struct smbsrv_request); + + if (key->length != 2) return NULL; + + return smbsrv_pull_fnum(req, key->data, 0); +} + +DATA_BLOB smbsrv_handle_get_wire_key(void *private_data, struct ntvfs_handle *handle, TALLOC_CTX *mem_ctx) +{ + uint8_t key[2]; + + smbsrv_push_fnum(key, 0, handle); + + return data_blob_talloc(mem_ctx, key, sizeof(key)); +} |