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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 17:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 17:47:29 +0000 |
commit | 4f5791ebd03eaec1c7da0865a383175b05102712 (patch) | |
tree | 8ce7b00f7a76baa386372422adebbe64510812d4 /source4/libcli/smb2/read.c | |
parent | Initial commit. (diff) | |
download | samba-4f5791ebd03eaec1c7da0865a383175b05102712.tar.xz samba-4f5791ebd03eaec1c7da0865a383175b05102712.zip |
Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'source4/libcli/smb2/read.c')
-rw-r--r-- | source4/libcli/smb2/read.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/source4/libcli/smb2/read.c b/source4/libcli/smb2/read.c new file mode 100644 index 0000000..ca487a7 --- /dev/null +++ b/source4/libcli/smb2/read.c @@ -0,0 +1,89 @@ +/* + Unix SMB/CIFS implementation. + + SMB2 client read call + + Copyright (C) Andrew Tridgell 2005 + + 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/smb2/smb2.h" +#include "libcli/smb2/smb2_calls.h" + +/* + send a read request +*/ +struct smb2_request *smb2_read_send(struct smb2_tree *tree, struct smb2_read *io) +{ + struct smb2_request *req; + + req = smb2_request_init_tree(tree, SMB2_OP_READ, 0x30, true, 0); + if (req == NULL) return NULL; + + SCVAL(req->out.body, 0x02, 0); /* pad */ + SCVAL(req->out.body, 0x03, 0); /* reserved */ + SIVAL(req->out.body, 0x04, io->in.length); + SBVAL(req->out.body, 0x08, io->in.offset); + smb2_push_handle(req->out.body+0x10, &io->in.file.handle); + SIVAL(req->out.body, 0x20, io->in.min_count); + SIVAL(req->out.body, 0x24, io->in.channel); + SIVAL(req->out.body, 0x28, io->in.remaining); + SSVAL(req->out.body, 0x2C, io->in.channel_offset); + SSVAL(req->out.body, 0x2E, io->in.channel_length); + + req->credit_charge = (MAX(io->in.length, 1) - 1)/ 65536 + 1; + + smb2_transport_send(req); + + return req; +} + + +/* + recv a read reply +*/ +NTSTATUS smb2_read_recv(struct smb2_request *req, + TALLOC_CTX *mem_ctx, struct smb2_read *io) +{ + NTSTATUS status; + + if (!smb2_request_receive(req) || + !smb2_request_is_ok(req)) { + return smb2_request_destroy(req); + } + + SMB2_CHECK_PACKET_RECV(req, 0x10, true); + + status = smb2_pull_o16s32_blob(&req->in, mem_ctx, req->in.body+0x02, &io->out.data); + if (!NT_STATUS_IS_OK(status)) { + smb2_request_destroy(req); + return status; + } + + io->out.remaining = IVAL(req->in.body, 0x08); + io->out.reserved = IVAL(req->in.body, 0x0C); + + return smb2_request_destroy(req); +} + +/* + sync read request +*/ +NTSTATUS smb2_read(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_read *io) +{ + struct smb2_request *req = smb2_read_send(tree, io); + return smb2_read_recv(req, mem_ctx, io); +} |