diff options
Diffstat (limited to 'libcli/smb/smb2cli_create.c')
| -rw-r--r-- | libcli/smb/smb2cli_create.c | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/libcli/smb/smb2cli_create.c b/libcli/smb/smb2cli_create.c new file mode 100644 index 0000000..325bc79 --- /dev/null +++ b/libcli/smb/smb2cli_create.c @@ -0,0 +1,321 @@ +/* + Unix SMB/CIFS implementation. + smb2 lib + Copyright (C) Volker Lendecke 2011 + + 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 "system/network.h" +#include "lib/util/tevent_ntstatus.h" +#include "smb_common.h" +#include "smbXcli_base.h" +#include "smb2_create_blob.h" + +struct smb2cli_create_state { + uint8_t fixed[56]; + + uint64_t fid_persistent; + uint64_t fid_volatile; + struct smb_create_returns cr; + struct smb2_create_blobs blobs; + struct tevent_req *subreq; +}; + +static void smb2cli_create_done(struct tevent_req *subreq); +static bool smb2cli_create_cancel(struct tevent_req *req); + +struct tevent_req *smb2cli_create_send( + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct smbXcli_conn *conn, + uint32_t timeout_msec, + struct smbXcli_session *session, + struct smbXcli_tcon *tcon, + const char *filename, + uint8_t oplock_level, /* SMB2_OPLOCK_LEVEL_* */ + uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */ + uint32_t desired_access, + uint32_t file_attributes, + uint32_t share_access, + uint32_t create_disposition, + uint32_t create_options, + struct smb2_create_blobs *blobs) +{ + struct tevent_req *req, *subreq; + struct smb2cli_create_state *state; + uint8_t *fixed; + uint8_t *name_utf16; + size_t name_utf16_len; + DATA_BLOB blob; + NTSTATUS status; + size_t blobs_offset; + uint8_t *dyn; + size_t dyn_len; + size_t max_dyn_len; + uint32_t additional_flags = 0; + uint32_t clear_flags = 0; + + req = tevent_req_create(mem_ctx, &state, + struct smb2cli_create_state); + if (req == NULL) { + return NULL; + } + + if (!convert_string_talloc(state, CH_UNIX, CH_UTF16, + filename, strlen(filename), + &name_utf16, &name_utf16_len)) { + tevent_req_oom(req); + return tevent_req_post(req, ev); + } + + if (strlen(filename) == 0) { + TALLOC_FREE(name_utf16); + name_utf16_len = 0; + } + + fixed = state->fixed; + + SSVAL(fixed, 0, 57); + SCVAL(fixed, 3, oplock_level); + SIVAL(fixed, 4, impersonation_level); + SIVAL(fixed, 24, desired_access); + SIVAL(fixed, 28, file_attributes); + SIVAL(fixed, 32, share_access); + SIVAL(fixed, 36, create_disposition); + SIVAL(fixed, 40, create_options); + + SSVAL(fixed, 44, SMB2_HDR_BODY + 56); + SSVAL(fixed, 46, name_utf16_len); + + blob = data_blob_null; + + if (blobs != NULL) { + status = smb2_create_blob_push(state, &blob, *blobs); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + } + + blobs_offset = name_utf16_len; + blobs_offset = ((blobs_offset + 3) & ~3); + + if (blob.length > 0) { + blobs_offset = ((blobs_offset + 7) & ~7); + SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56); + SIVAL(fixed, 52, blob.length); + } + + dyn_len = MAX(1, blobs_offset + blob.length); + dyn = talloc_zero_array(state, uint8_t, dyn_len); + if (tevent_req_nomem(dyn, req)) { + return tevent_req_post(req, ev); + } + + if (name_utf16) { + memcpy(dyn, name_utf16, name_utf16_len); + TALLOC_FREE(name_utf16); + } + + if (blob.data != NULL) { + memcpy(dyn + blobs_offset, + blob.data, blob.length); + data_blob_free(&blob); + } + + if (smbXcli_conn_dfs_supported(conn) && + smbXcli_tcon_is_dfs_share(tcon)) + { + additional_flags |= SMB2_HDR_FLAG_DFS; + } + + /* + * We use max_dyn_len = 0 + * as we don't explicitly ask for any output length. + * + * But it's still possible for the server to return + * large create blobs. + */ + max_dyn_len = 0; + + subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_CREATE, + additional_flags, clear_flags, + timeout_msec, + tcon, + session, + state->fixed, sizeof(state->fixed), + dyn, dyn_len, + max_dyn_len); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb2cli_create_done, req); + + state->subreq = subreq; + tevent_req_set_cancel_fn(req, smb2cli_create_cancel); + + return req; +} + +static bool smb2cli_create_cancel(struct tevent_req *req) +{ + struct smb2cli_create_state *state = tevent_req_data(req, + struct smb2cli_create_state); + return tevent_req_cancel(state->subreq); +} + +static void smb2cli_create_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smb2cli_create_state *state = + tevent_req_data(req, + struct smb2cli_create_state); + NTSTATUS status; + struct iovec *iov; + uint8_t *body; + uint32_t offset, length; + static const struct smb2cli_req_expected_response expected[] = { + { + .status = NT_STATUS_OK, + .body_size = 0x59 + } + }; + + status = smb2cli_req_recv(subreq, state, &iov, + expected, ARRAY_SIZE(expected)); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + body = (uint8_t *)iov[1].iov_base; + + state->cr.oplock_level = CVAL(body, 2); + state->cr.create_action = IVAL(body, 4); + state->cr.creation_time = BVAL(body, 8); + state->cr.last_access_time = BVAL(body, 16); + state->cr.last_write_time = BVAL(body, 24); + state->cr.change_time = BVAL(body, 32); + state->cr.allocation_size = BVAL(body, 40); + state->cr.end_of_file = BVAL(body, 48); + state->cr.file_attributes = IVAL(body, 56); + state->fid_persistent = BVAL(body, 64); + state->fid_volatile = BVAL(body, 72); + + offset = IVAL(body, 80); + length = IVAL(body, 84); + + if ((offset != 0) && (length != 0)) { + if ((offset != SMB2_HDR_BODY + 88) || + (length > iov[2].iov_len)) { + tevent_req_nterror( + req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + status = smb2_create_blob_parse( + state, data_blob_const(iov[2].iov_base, length), + &state->blobs); + if (tevent_req_nterror(req, status)) { + return; + } + } + tevent_req_done(req); +} + +NTSTATUS smb2cli_create_recv(struct tevent_req *req, + uint64_t *fid_persistent, + uint64_t *fid_volatile, + struct smb_create_returns *cr, + TALLOC_CTX *mem_ctx, + struct smb2_create_blobs *blobs) +{ + struct smb2cli_create_state *state = + tevent_req_data(req, + struct smb2cli_create_state); + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + tevent_req_received(req); + return status; + } + *fid_persistent = state->fid_persistent; + *fid_volatile = state->fid_volatile; + if (cr) { + *cr = state->cr; + } + if (blobs) { + blobs->num_blobs = state->blobs.num_blobs; + blobs->blobs = talloc_move(mem_ctx, &state->blobs.blobs); + } + tevent_req_received(req); + return NT_STATUS_OK; +} + +NTSTATUS smb2cli_create(struct smbXcli_conn *conn, + uint32_t timeout_msec, + struct smbXcli_session *session, + struct smbXcli_tcon *tcon, + const char *filename, + uint8_t oplock_level, /* SMB2_OPLOCK_LEVEL_* */ + uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */ + uint32_t desired_access, + uint32_t file_attributes, + uint32_t share_access, + uint32_t create_disposition, + uint32_t create_options, + struct smb2_create_blobs *blobs, + uint64_t *fid_persistent, + uint64_t *fid_volatile, + struct smb_create_returns *cr, + TALLOC_CTX *mem_ctx, + struct smb2_create_blobs *ret_blobs) +{ + TALLOC_CTX *frame = talloc_stackframe(); + struct tevent_context *ev; + struct tevent_req *req; + NTSTATUS status = NT_STATUS_NO_MEMORY; + + if (smbXcli_conn_has_async_calls(conn)) { + /* + * Can't use sync call while an async call is in flight + */ + status = NT_STATUS_INVALID_PARAMETER; + goto fail; + } + ev = samba_tevent_context_init(frame); + if (ev == NULL) { + goto fail; + } + req = smb2cli_create_send(frame, ev, conn, timeout_msec, + session, tcon, + filename, oplock_level, + impersonation_level, desired_access, + file_attributes, share_access, + create_disposition, create_options, + blobs); + if (req == NULL) { + goto fail; + } + if (!tevent_req_poll_ntstatus(req, ev, &status)) { + goto fail; + } + status = smb2cli_create_recv(req, fid_persistent, fid_volatile, cr, + mem_ctx, ret_blobs); + fail: + TALLOC_FREE(frame); + return status; +} |