diff options
Diffstat (limited to 'source3/libsmb')
| -rw-r--r-- | source3/libsmb/smb2cli.h | 22 | ||||
| -rw-r--r-- | source3/libsmb/smb2cli_read.c | 163 |
2 files changed, 185 insertions, 0 deletions
diff --git a/source3/libsmb/smb2cli.h b/source3/libsmb/smb2cli.h index 31c593be89..ea128cf494 100644 --- a/source3/libsmb/smb2cli.h +++ b/source3/libsmb/smb2cli.h @@ -104,4 +104,26 @@ NTSTATUS smb2cli_flush(struct cli_state *cli, uint64_t fid_persistent, uint64_t fid_volatile); +struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct cli_state *cli, + uint32_t length, + uint64_t offset, + uint64_t fid_persistent, + uint64_t fid_volatile, + uint64_t minimum_count, + uint64_t remaining_bytes); +NTSTATUS smb2cli_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + uint8_t **data, uint32_t *data_length); +NTSTATUS smb2cli_read(struct cli_state *cli, + uint32_t length, + uint64_t offset, + uint64_t fid_persistent, + uint64_t fid_volatile, + uint64_t minimum_count, + uint64_t remaining_bytes, + TALLOC_CTX *mem_ctx, + uint8_t **data, + uint32_t *data_length); + #endif /* __SMB2CLI_H__ */ diff --git a/source3/libsmb/smb2cli_read.c b/source3/libsmb/smb2cli_read.c new file mode 100644 index 0000000000..79224e517a --- /dev/null +++ b/source3/libsmb/smb2cli_read.c @@ -0,0 +1,163 @@ +/* + 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 "client.h" +#include "async_smb.h" +#include "smb2cli_base.h" +#include "smb2cli.h" +#include "libsmb/proto.h" +#include "lib/util/tevent_ntstatus.h" + +struct smb2cli_read_state { + uint8_t fixed[48]; + uint8_t *inbuf; + uint8_t *data; + uint32_t data_length; +}; + +static void smb2cli_read_done(struct tevent_req *subreq); + +struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct cli_state *cli, + uint32_t length, + uint64_t offset, + uint64_t fid_persistent, + uint64_t fid_volatile, + uint64_t minimum_count, + uint64_t remaining_bytes) +{ + struct tevent_req *req, *subreq; + struct smb2cli_read_state *state; + uint8_t *fixed; + + req = tevent_req_create(mem_ctx, &state, + struct smb2cli_read_state); + if (req == NULL) { + return NULL; + } + + fixed = state->fixed; + + SSVAL(fixed, 0, 49); + SIVAL(fixed, 4, length); + SBVAL(fixed, 8, offset); + SBVAL(fixed, 16, fid_persistent); + SBVAL(fixed, 24, fid_volatile); + SBVAL(fixed, 32, minimum_count); + SBVAL(fixed, 40, remaining_bytes); + + subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_READ, 0, + state->fixed, sizeof(state->fixed), + NULL, 0); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb2cli_read_done, req); + return req; +} + +static void smb2cli_read_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct smb2cli_read_state *state = + tevent_req_data(req, + struct smb2cli_read_state); + NTSTATUS status; + struct iovec *iov; + uint8_t data_offset; + + status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 17); + if (tevent_req_nterror(req, status)) { + return; + } + + data_offset = CVAL(iov[1].iov_base, 2); + state->data_length = IVAL(iov[1].iov_base, 4); + + if ((data_offset != SMB2_HDR_BODY + 16) || + (state->data_length > iov[2].iov_len)) { + tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + state->inbuf = smb2cli_req_inbuf(subreq); + state->data = (uint8_t *)iov[2].iov_base; + tevent_req_done(req); +} + +NTSTATUS smb2cli_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + uint8_t **data, uint32_t *data_length) +{ + struct smb2cli_read_state *state = + tevent_req_data(req, + struct smb2cli_read_state); + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + return status; + } + talloc_steal(mem_ctx, state->inbuf); + *data_length = state->data_length; + *data = state->data; + return NT_STATUS_OK; +} + +NTSTATUS smb2cli_read(struct cli_state *cli, + uint32_t length, + uint64_t offset, + uint64_t fid_persistent, + uint64_t fid_volatile, + uint64_t minimum_count, + uint64_t remaining_bytes, + TALLOC_CTX *mem_ctx, + uint8_t **data, + uint32_t *data_length) +{ + TALLOC_CTX *frame = talloc_stackframe(); + struct event_context *ev; + struct tevent_req *req; + NTSTATUS status = NT_STATUS_NO_MEMORY; + + if (cli_has_async_calls(cli)) { + /* + * Can't use sync call while an async call is in flight + */ + status = NT_STATUS_INVALID_PARAMETER; + goto fail; + } + ev = event_context_init(frame); + if (ev == NULL) { + goto fail; + } + req = smb2cli_read_send(frame, ev, cli, length, offset, + fid_persistent, fid_volatile, + minimum_count, remaining_bytes); + if (req == NULL) { + goto fail; + } + if (!tevent_req_poll_ntstatus(req, ev, &status)) { + goto fail; + } + status = smb2cli_read_recv(req, mem_ctx, data, data_length); + fail: + TALLOC_FREE(frame); + return status; +} |